1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2021 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * Bump r_version in the debugger interface to 2 and add a new field,
13 r_next, support multiple namespaces.
15 * Support for the C.UTF-8 locale has been added to glibc. The locale
16 supports full code-point sorting for all valid Unicode code points. A
17 limitation in the framework for fnmatch, regexec, and regcomp requires
18 a compromise to save space and only ASCII-based range expressions are
19 supported for now (see bug 28255). The full size of the locale is
20 only ~400KiB, with 346KiB coming from LC_CTYPE information for
21 Unicode. This locale harmonizes downstream C.UTF-8 already shipping
22 in various downstream distributions. The locale is not built into
23 glibc, and must be installed.
25 * <math.h> functions that round their results to a narrower type, and
26 corresponding <tgmath.h> macros, are added from TS 18661-1:2014, TS
27 18661-3:2015 and draft ISO C2X:
29 - fsqrt, fsqrtl, dsqrtl and corresponding fMsqrtfN, fMsqrtfNx,
30 fMxsqrtfN and fMxsqrtfNx functions.
32 - ffma, ffmal, dfmal and corresponding fMfmafN, fMfmafNx, fMxfmafN and
35 * <math.h> functions for floating-point maximum and minimum,
36 corresponding to new operations in IEEE 754-2019, and corresponding
37 <tgmath.h> macros, are added from draft ISO C2X: fmaximum,
38 fmaximum_num, fmaximum_mag, fmaximum_mag_num, fminimum, fminimum_num,
39 fminimum_mag, fminimum_mag_num and corresponding functions for float,
40 long double, _FloatN and _FloatNx.
42 * The __STDC_IEC_60559_BFP__ and __STDC_IEC_60559_COMPLEX__ macros are
43 predefined as specified in TS 18661-1:2014.
45 * The exp10 functions in <math.h> now have a corresponding type-generic
48 * The ISO C2X macro _PRINTF_NAN_LEN_MAX has been added to <stdio.h>.
50 Deprecated and removed features, and other changes affecting compatibility:
52 * The r_version update in the debugger interface makes the glibc binary
53 incompatible with GDB binaries built without the following commits:
55 c0154a4a21a gdb: Don't assume r_ldsomap when r_version > 1 on Linux
56 4eb629d50d4 gdbserver: Check r_version < 1 for Linux debugger interface
58 when audit modules or dlmopen are used.
60 Changes to build and runtime requirements:
62 [Add changes to build and runtime requirements here]
64 Security related changes:
66 [Add security related changes here]
68 The following bugs are resolved with this release:
70 [The release manager will add the list generated by
71 scripts/list-fixed-bugs.py just before the release.]
78 * In order to support smoother in-place-upgrades and to simplify
79 the implementation of the runtime all functionality formerly
80 implemented in the libraries libpthread, libdl, libutil, libanl has
81 been integrated into libc. New applications do not need to link with
82 -lpthread, -ldl, -lutil, -lanl anymore. For backwards compatibility,
83 empty static archives libpthread.a, libdl.a, libutil.a, libanl.a are
84 provided, so that the linker options keep working. Applications which
85 have been linked against glibc 2.33 or earlier continue to load the
86 corresponding shared objects (which are now empty). The integration
87 of those libraries into libc means that additional symbols become
88 available by default. This can cause applications that contain weak
89 references to take unexpected code paths that would only have been
90 used in previous glibc versions when e.g. preloading libpthread.so.0,
91 potentially exposing application bugs.
93 * When _DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined,
94 PTHREAD_STACK_MIN is no longer constant and is redefined to
95 sysconf(_SC_THREAD_STACK_MIN). This supports dynamic sized register
96 sets for modern architectural features like Arm SVE.
98 * Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ. When _DYNAMIC_STACK_SIZE_SOURCE
99 or _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer
100 constant on Linux. MINSIGSTKSZ is redefined to sysconf(_SC_MINSIGSTKSZ)
101 and SIGSTKSZ is redefined to sysconf (_SC_SIGSTKSZ). This supports
102 dynamic sized register sets for modern architectural features like
105 * The dynamic linker implements the --list-diagnostics option, printing
106 a dump of information related to IFUNC resolver operation and
107 glibc-hwcaps subdirectory selection.
109 * On Linux, the function execveat has been added. It operates similar to
110 execve and it is is already used to implement fexecve without requiring
111 /proc to be mounted. However, different than fexecve, if the syscall is not
112 supported by the kernel an error is returned instead of trying a fallback.
114 * The ISO C2X function timespec_getres has been added.
116 * The feature test macro __STDC_WANT_IEC_60559_EXT__, from draft ISO
117 C2X, is supported to enable declarations of functions defined in Annex F
118 of C2X. Those declarations are also enabled when
119 __STDC_WANT_IEC_60559_BFP_EXT__, as specified in TS 18661-1, is
120 defined, and when _GNU_SOURCE is defined.
122 * On powerpc64*, glibc can now be compiled without scv support using the
123 --disable-scv configure option.
125 * Add support for 64-bit time_t on configurations like x86 where time_t
126 is traditionally 32-bit. Although time_t still defaults to 32-bit on
127 these configurations, this default may change in future versions.
128 This is enabled with the _TIME_BITS preprocessor macro set to 64 and is
129 only supported when LFS (_FILE_OFFSET_BITS=64) is also enabled. It is
130 only enabled for Linux and the full support requires a minimum kernel
133 * The main gconv-modules file in glibc now contains only a small set of
134 essential converter modules and the rest have been moved into a supplementary
135 configuration file gconv-modules-extra.conf in the gconv-modules.d directory
136 in the same GCONV_PATH. Similarly, external converter modules directories
137 may have supplementary configuration files in a gconv-modules.d directory
138 with names ending with .conf to logically classify the converter modules in
141 * On Linux, a new tunable, glibc.pthread.stack_cache_size, can be used
142 to configure the size of the thread stack cache.
144 * The function _Fork has been added as an async-signal-safe fork replacement
145 since Austin Group issue 62 droped the async-signal-safe requirement for
146 fork (and it will be included in the future POSIX standard). The new _Fork
147 function does not run any atfork function neither resets any internal state
148 or lock (such as the malloc one), and only sets up a minimal state required
149 to call async-signal-safe functions (such as raise or execve). This function
150 is currently a GNU extension.
152 * On Linux, the close_range function has been added. It allows efficiently
153 closing a range of file descriptors on recent kernels (version 5.9).
155 * The function closefrom has been added. It closes all file descriptors
156 greater than or equal to a given integer. This function is a GNU extension,
157 although it is also present in other systems.
159 * The posix_spawn_file_actions_addclosefrom_np function has been added,
160 enabling posix_spawn and posix_spawnp to close all file descriptors greater
161 than or equal to a given integer. This function is a GNU extension,
162 although Solaris also provides a similar function.
164 Deprecated and removed features, and other changes affecting compatibility:
166 * The function pthread_mutex_consistent_np has been deprecated; programs
167 should use the equivalent standard function pthread_mutex_consistent
170 * The function pthread_mutexattr_getrobust_np has been deprecated;
171 programs should use the equivalent standard function
172 pthread_mutexattr_getrobust instead.
174 * The function pthread_mutexattr_setrobust_np has been deprecated;
175 programs should use the equivalent standard function
176 pthread_mutexattr_setrobust instead.
178 * The function pthread_yield has been deprecated; programs should use
179 the equivalent standard function sched_yield instead.
181 * The function inet_neta declared in <arpa/inet.h> has been deprecated.
183 * Various rarely-used functions declared in <resolv.h> and
184 <arpa/nameser.h> have been deprecated. Applications are encouraged to
185 use dedicated DNS processing libraries if applicable. For <resolv.h>,
186 this affects the functions dn_count_labels, fp_nquery, fp_query,
187 fp_resstat, hostalias, loc_aton, loc_ntoa, p_cdname, p_cdnname,
188 p_class, p_fqname, p_fqnname, p_option, p_query, p_rcode, p_time,
189 p_type, putlong, putshort, res_hostalias, res_isourserver,
190 res_nameinquery, res_queriesmatch, res_randomid, sym_ntop, sym_ntos,
191 sym_ston. For <arpa/nameser.h>, the functions ns_datetosecs,
192 ns_format_ttl, ns_makecanon, ns_parse_ttl, ns_samedomain, ns_samename,
193 ns_sprintrr, ns_sprintrrf, ns_subdomain have been deprecated.
195 * Various symbols previously defined in libresolv have been moved to libc
196 in order to prepare for libresolv moving entirely into libc (see earlier
197 entry for merging libraries into libc). The symbols __dn_comp,
198 __dn_expand, __dn_skipname, __res_dnok, __res_hnok, __res_mailok,
199 __res_mkquery, __res_nmkquery, __res_nquery, __res_nquerydomain,
200 __res_nsearch, __res_nsend, __res_ownok, __res_query, __res_querydomain,
201 __res_search, __res_send formerly in libresolv have been renamed and no
202 longer have a __ prefix. They are now available in libc.
204 * The pthread cancellation handler is now installed with SA_RESTART and
205 pthread_cancel will always send the internal SIGCANCEL on a cancellation
206 request. It should not be visible to applications since the cancellation
207 handler should either act upon cancellation (if asynchronous cancellation
208 is enabled) or ignore the cancellation internal signal. However there are
209 buggy kernel interfaces (for instance some CIFS versions) that could still
210 see a spurious EINTR error when cancellation interrupts a blocking syscall.
212 * Previously, glibc installed its various shared objects under versioned
213 file names such as libc-2.33.so. The ABI sonames (e.g., libc.so.6)
214 were provided as symbolic links. Starting with glibc 2.34, the shared
215 objects are installed under their ABI sonames directly, without
216 symbolic links. This increases compatibility with distribution
217 package managers that delete removed files late during the package
218 upgrade or downgrade process.
220 * The symbols mallwatch and tr_break are now deprecated and no longer used in
221 mtrace. Similar functionality can be achieved by using conditional
222 breakpoints within mtrace functions from within gdb.
224 * The __morecore and __after_morecore_hook malloc hooks and the default
225 implementation __default_morecore have been removed from the API. Existing
226 applications will continue to link against these symbols but the interfaces
227 no longer have any effect on malloc.
229 * Debugging features in malloc such as the MALLOC_CHECK_ environment variable
230 (or the glibc.malloc.check tunable), mtrace() and mcheck() have now been
231 disabled by default in the main C library. Users looking to use these
232 features now need to preload a new debugging DSO libc_malloc_debug.so to get
233 this functionality back.
235 * The deprecated functions malloc_get_state and malloc_set_state have been
236 moved from the core C library into libc_malloc_debug.so. Legacy applications
237 that still use these functions will now need to preload libc_malloc_debug.so
238 in their environment using the LD_PRELOAD environment variable.
240 * The deprecated memory allocation hooks __malloc_hook, __realloc_hook,
241 __memalign_hook and __free_hook are now removed from the API. Compatibility
242 symbols are present to support legacy programs but new applications can no
243 longer link to these symbols. These hooks no longer have any effect on glibc
244 functionality. The malloc debugging DSO libc_malloc_debug.so currently
245 supports hooks and can be preloaded to get this functionality back for older
246 programs. However this is a transitional measure and may be removed in a
247 future release of the GNU C Library. Users may port away from these hooks by
248 writing and preloading their own malloc interposition library.
250 Changes to build and runtime requirements:
252 * On Linux, the shm_open, sem_open, and related functions now expect the
253 file shared memory file system to be mounted at /dev/shm. These functions
254 no longer search among the system's mount points for a suitable
255 replacement if /dev/shm is not available.
257 Security related changes:
259 CVE-2021-27645: The nameserver caching daemon (nscd), when processing
260 a request for netgroup lookup, may crash due to a double-free,
261 potentially resulting in degraded service or Denial of Service on the
262 local system. Reported by Chris Schanzle.
264 CVE-2021-33574: The mq_notify function has a potential use-after-free
265 issue when using a notification type of SIGEV_THREAD and a thread
266 attribute with a non-default affinity mask.
268 CVE-2021-35942: The wordexp function may overflow the positional
269 parameter number when processing the expansion resulting in a crash.
270 Reported by Philippe Antoine.
272 The following bugs are resolved with this release:
274 [4737] libc: fork is not async-signal-safe
275 [5781] math: Slow dbl-64 sin/cos/sincos for special values
276 [10353] libc: Methods for deleting all file descriptors greater than
277 given integer (closefrom)
278 [14185] glob: fnmatch() fails when '*' wildcard is applied on the file
279 name containing multi-byte character(s)
280 [14469] math: Inaccurate j0f function
281 [14470] math: Inaccurate j1f function
282 [14471] math: Inaccurate y0f function
283 [14472] math: Inaccurate y1f function
284 [14744] nptl: kill -32 $pid or kill -33 $pid on a process cancels a
286 [15271] dynamic-link: dlmopen()ed shared library with LM_ID_NEWLM
287 crashes if it fails dlsym() twice
288 [15648] nptl: multiple definition of `__lll_lock_wait_private'
289 [16063] nptl: Provide a pthread_once variant in libc directly
290 [17144] libc: syslog is not thread-safe if NO_SIGPIPE is not defined
291 [17145] libc: syslog with LOG_CONS leaks console file descriptor
292 [17183] manual: description of ENTRY struct in <search.h> in glibc
294 [18435] nptl: pthread_once hangs when init routine throws an exception
295 [18524] nptl: Missing calloc error checking in
296 __cxa_thread_atexit_impl
297 [19329] dynamic-link: dl-tls.c assert failure at concurrent
298 pthread_create and dlopen
299 [19366] nptl: returning from a thread should disable cancellation
300 [19511] nptl: 8MB memory leak in pthread_create in case of failure
301 when non-root user changes priority
302 [20802] dynamic-link: getauxval NULL pointer dereference after static
304 [20813] nptl: pthread_exit is inconsistent between libc and libpthread
305 [22057] malloc: malloc_usable_size is broken with mcheck
306 [22668] locale: LC_COLLATE: the last character of ellipsis is not
308 [23323] libc: [RFE] CSU startup hardening.
309 [23328] malloc: Remove malloc hooks and ensure related APIs return no
311 [23462] dynamic-link: Static binary with dynamic string tokens ($LIB,
312 $PLATFORM, $ORIGIN) crashes
313 [23489] libc: "gcc -lmcheck" aborts on free when using posix_memalign
314 [23554] nptl: pthread_getattr_np reports wrong stack size with
316 [24106] libc: Bash interpreter in ldd script is taken from host
317 [24773] dynamic-link: dlerror in an secondary namespace does not use
318 the right free implementation
319 [25036] localedata: Update collation order for Swedish
320 [25383] libc: where_is_shmfs/__shm_directory/SHM_GET_NAME may cause
321 shm_open to pick wrong directory
322 [25680] dynamic-link: ifuncmain9picstatic and ifuncmain9picstatic
323 crash in IFUNC resolver due to stack canary (--enable-stack-
325 [26874] build: -Warray-bounds in _IO_wdefault_doallocate
326 [26983] math: [x86_64] x86_64 tgamma has too large ULP error
327 [27111] dynamic-link: pthread_create and tls access use link_map
328 objects that may be concurrently freed by dlclose
329 [27132] malloc: memusagestat is linked to system librt, leading to
330 undefined symbols on major version upgrade
331 [27136] dynamic-link: dtv setup at thread creation may leave an entry
333 [27249] libc: libSegFault.so does not output signal number properly
334 [27304] nptl: pthread_cond_destroy does not pass private flag to futex
336 [27318] dynamic-link: glibc fails to load binaries when built with
337 -march=sandybridge: CPU ISA level is lower than required
338 [27343] nss: initgroups() SIGSEGVs when called on a system without
339 nsswich.conf (in a chroot)
340 [27346] dynamic-link: x86: PTWRITE feature check is missing
341 [27389] network: NSS chroot hardening causes regressions in chroot
343 [27403] dynamic-link: aarch64: tlsdesc htab is not freed on dlclose
344 [27444] libc: sysconf reports unsupported option (-1) for
345 _SC_LEVEL1_ICACHE_LINESIZE on X86 since v2.33
346 [27462] nscd: double-free in nscd (CVE-2021-27645)
347 [27468] malloc: aarch64: realloc crash with heap tagging: FAIL:
348 malloc/tst-malloc-thread-fail
349 [27498] dynamic-link: __dl_iterate_phdr lacks unwinding information
350 [27511] libc: S390 memmove assumes Vector Facility when MIE Facility 3
352 [27522] glob: glob, glob64 incorrectly marked as __THROW
353 [27555] dynamic-link: Static tests fail with --enable-stack-
355 [27559] libc: fstat(AT_FDCWD) succeeds (it shouldn't) and returns
356 information for the current directory
357 [27577] dynamic-link: elf/ld.so --help doesn't work
358 [27605] libc: tunables can't control xsave/xsavec selection in
360 [27623] libc: powerpc: Missing registers in sc[v] clobbers list
361 [27645] libc: [linux] sysconf(_SC_NPROCESSOR...) breaks down on
363 [27646] dynamic-link: Linker error for non-existing NSS symbols (e.g.
364 _nss_files_getcanonname_r) from within a dlmopen namespace.
365 [27648] libc: FAIL: misc/tst-select
366 [27650] stdio: vfscanf returns too early if a match is longer than
368 [27651] libc: Performance regression after updating to 2.33
369 [27655] string: Wrong size calculation in string/test-strnlen.c
370 [27706] libc: select fails to update timeout on error
371 [27709] libc: arm: FAIL: debug/tst-longjmp_chk2
372 [27721] dynamic-link: x86: ld_audit ignores bind now for TLSDESC and
373 tries resolving them lazily
374 [27744] nptl: Support different libpthread/ld.so load orders in
376 [27749] libc: Data race __run_exit_handlers
377 [27761] libc: getconf: Segmentation fault when passing '-vq' as
379 [27832] nss: makedb.c:797:7: error: 'writev' specified size 4294967295
380 exceeds maximum object size 2147483647
381 [27870] malloc: MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to
383 [27872] build: Obsolete configure option --enable-stackguard-
385 [27873] build: tst-cpu-features-cpuinfo fail when building on AMD cpu
386 [27882] localedata: Use U+00AF MACRON in more EBCDIC charsets
387 [27892] libc: powerpc: scv ABI error handling fails to check
389 [27896] nptl: mq_notify does not handle separately allocated thread
390 attributes (CVE-2021-33574)
391 [27901] libc: TEST_STACK_ALIGN doesn't work
392 [27902] libc: The x86-64 clone wrapper fails to align child stack
393 [27914] nptl: Install SIGSETXID handler with SA_ONSTACK
394 [27939] libc: aarch64: clone does not align the stack
395 [27968] libc: s390x: clone does not align the stack
396 [28011] libc: Wild read in wordexp (parse_param) (CVE-2021-35942)
397 [28024] string: s390(31bit): Wrong result of memchr (MEMCHR_Z900_G5)
399 [28028] malloc: malloc: tcache shutdown sequence does not work if the
400 thread never allocated anything
401 [28033] libc: Need to check RTM_ALWAYS_ABORT for RTM
402 [28064] string: x86_64:wcslen implementation list has wcsnlen
403 [28067] libc: FAIL: posix/tst-spawn5
404 [28068] malloc: FAIL: malloc/tst-mallocalign1-mcheck
405 [28071] time: clock_gettime, gettimeofday, time lost vDSO acceleration
407 [28075] nis: Out-of-bounds static buffer read in nis_local_domain
408 [28089] build: tst-tls20 fails when linker defaults to --as-needed
409 [28090] build: elf/tst-cpu-features-cpuinfo-static fails on certain
411 [28091] network: ns_name_skip may return 0 for domain names without
419 * The dynamic linker accepts the --list-tunables argument which prints
420 all the supported tunables. This option is disable if glibc is
421 configured with tunables disabled (--enable-tunables=no).
423 * The dynamic linker accepts the --argv0 argument and provides opportunity
424 to change argv[0] string.
426 * The dynamic linker loads optimized implementations of shared objects
427 from subdirectories under the glibc-hwcaps directory on the library
428 search path if the system's capabilities meet the requirements for
429 that subdirectory. Initially supported subdirectories include
430 "power9" and "power10" for the powerpc64le-linux-gnu architecture,
431 "z13", "z14", "z15" for s390x-linux-gnu, and "x86-64-v2", "x86-64-v3",
432 "x86-64-v4" for x86_64-linux-gnu. In the x86_64-linux-gnu case, the
433 subdirectory names correspond to the vendor-independent x86-64
434 microarchitecture levels defined in the x86-64 psABI supplement.
436 * The new --help option of the dynamic linker provides usage and
437 information and library search path diagnostics.
439 * The mallinfo2 function is added to report statistics as per mallinfo,
440 but with larger field widths to accurately report values that are
441 larger than fit in an integer.
443 * Add <sys/platform/x86.h> to provide query macros for x86 CPU features.
445 * Support for the RISC-V ISA running on Linux has been expanded to run on
446 32-bit hardware. This is supported for the following ISA and ABI pairs:
452 The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils
455 * A new fortification level _FORTIFY_SOURCE=3 is available. At this level,
456 glibc may use additional checks that may have an additional performance
457 overhead. At present these checks are available only on LLVM 9 and later.
458 The latest GCC available at this time (10.2) does not support this level of
461 Deprecated and removed features, and other changes affecting compatibility:
463 * The mallinfo function is marked deprecated. Callers should call
466 * When dlopen is used in statically linked programs, alternative library
467 implementations from HWCAP subdirectories are no longer loaded.
468 Instead, the default implementation is used.
470 * The deprecated <sys/vtimes.h> header and the function vtimes have been
471 removed. To support old binaries, the vtimes function continues to exist
472 as a compatibility symbol. Applications should use the getrlimit or
475 * Following a change in the tzdata 2018a release upstream, the zdump
476 program is now installed in the /usr/bin subdirectory. Previously,
477 the /usr/sbin subdirectory was used.
479 * On s390(x), the type float_t is now derived from the macro
480 __FLT_EVAL_METHOD__ that is defined by the compiler, instead of being
481 hardcoded to double. This does not affect the ABI of any libraries
482 that are part of the GNU C Library, but may affect the ABI of other
483 libraries that use this type in their interfaces. The new definition
484 improves consistency with compiler behavior in many scenarios.
486 * A future version of glibc will stop loading shared objects from the
487 "tls" subdirectories on the library search path, the subdirectory that
488 corresponds to the AT_PLATFORM system name, and also stop employing
489 the legacy AT_HWCAP search mechanism. Applications should switch to
490 the new glibc-hwcaps mechanism instead; if they do not do that, only
491 the baseline version (directly from the search path directory) will be
494 Changes to build and runtime requirements:
496 * On Linux, the system administrator needs to configure /dev/pts with
497 the intended access modes for pseudo-terminals. glibc no longer
498 attemps to adjust permissions of terminal devices. The previous glibc
499 defaults ("tty" group, user read/write and group write) already
500 corresponded to what most systems used, so that grantpt did not
501 perform any adjustments.
503 * On Linux, the posix_openpt and getpt functions no longer attempt to
504 use legacy (BSD) pseudo-terminals and assume that if /dev/ptmx exists
505 (and pseudo-terminals are supported), a devpts file system is mounted
506 on /dev/pts. Current systems already meet these requirements.
508 * s390x requires GCC 7.1 or newer. See gcc Bug 98269.
510 Security related changes:
512 CVE-2021-3326: An assertion failure during conversion from the
513 ISO-20220-JP-3 character set using the iconv function has been fixed.
514 This assertion was triggered by certain valid inputs in which the
515 converted output contains a combined sequence of two wide characters
516 crossing a buffer boundary. Reported by Tavis Ormandy.
518 CVE-2020-27618: An infinite loop has been fixed in the iconv program when
519 invoked with input containing redundant shift sequences in the IBM1364,
520 IBM1371, IBM1388, IBM1390, or IBM1399 character sets.
522 CVE-2020-29562: An assertion failure has been fixed in the iconv function
523 when invoked with UCS4 input containing an invalid character.
525 CVE-2019-25013: A buffer overflow has been fixed in the iconv function when
526 invoked with EUC-KR input containing invalid multibyte input sequences.
528 The following bugs are resolved with this release:
530 [10635] libc: realpath portability patches
531 [16124] dynamic-link: ld.so should allow to change argv[0]
532 [17924] malloc: 'free' should not set errno
533 [18683] libc: Linux faccessat implementation can incorrectly ignore
535 [22899] libc: Use 64-bit readdir() in generic POSIX getcwd()
536 [23091] hurd: missing waitid support
537 [23249] libc: Epyc and other current AMD CPUs do not select the
538 "haswell" platform subdirectory
539 [24080] dynamic-link: Definition of "haswell" platform is inconsistent
541 [24202] libc: m68k setjmp() saves incorrect 'a5' register in --enable-
543 [24941] libc: Make grantpt usable after multi-threaded fork in more
545 [24970] libc: realpath mishandles EOVERFLOW; stat not needed anyway
546 [24973] locale: iconv encounters segmentation fault when converting
547 0x00 0xfe in EUC-KR to UTF-8 (CVE-2019-25013)
548 [25399] string: undefined reference to `__warn_memset_zero_len' when
549 changing gnuc version
550 [25859] libc: glibc parser for /sys/devices/system/cpu/online is
552 [25938] dynamic-link: ld.so.cache should store meaning of hwcap mask
554 [25971] libc: s390 bits/hwcap.h out of sync with kernel
555 [26053] libc: unlockpt fails with ENOTTY for non-ptmx descriptors
556 [26100] libc: Race in syslog(3) with regards to tag printing.
557 [26124] libc: Export <cpu-features.h>
558 [26130] nscd: Inconsistent nscd cache during pruning
559 [26203] libc: GLRO(dl_x86_cpu_features) may not be intialized
560 [26224] locale: iconv hangs when converting some invalid inputs from
561 several IBM character sets (CVE-2020-27618)
562 [26341] libc: realpath cyclically call __alloca(path_max) to consume
564 [26343] manual: invalid documented return type for strerrorname_np(),
565 strerrordesc_np(), sigdescr_np(), sigabbrev_np()
566 [26376] libc: Namespace violation in stdio.h and sys/stat.h if build
568 [26383] locale: bind_textdomain_codeset doesn't accept //TRANSLIT
570 [26394] time: [2.33 Regression] FAIL: nptl/tst-join14
571 [26534] math: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on
573 [26552] dynamic-link: CPU_FEATURE_USABLE_P should be more conservative
574 [26553] libc: mtx_init allows type set to "mtx_recursive" only
575 [26555] string: strerrorname_np does not return the documented value
576 [26592] libc: pointer arithmetic overflows in realpath
577 [26600] network: Transaction ID collisions cause slow DNS lookups in
579 [26606] libc: [2.33 Regression] pselect is broken on x32
580 [26615] libc: powerpc: libc segfaults when LD_PRELOADed with libgcc
581 [26620] glob: fnmatch with collating symbols results in segmentation
583 [26625] libc: [2.33 Regression] CET is disabled
584 [26636] libc: 32-bit shmctl(IPC_INFO) crashes when shminfo struct is
585 at the end of a memory mapping
586 [26637] libc: semctl SEM_STAT_ANY fails to pass the buffer specified
587 by the caller to the kernel
588 [26639] libc: msgctl IPC_INFO and MSG_INFO return garbage
589 [26647] build: [-Werror=array-parameter=] due to different
590 declarations for __sigsetjmp
591 [26648] libc: mkstemp is likely to fail on systems with non-stricly-
593 [26649] stdio: printf should handle non-normal x86 long double numbers
594 gracefully (CVE-2020-29573)
595 [26686] build: -Warray-parameter instances building with GCC 11
596 [26687] build: -Warray-bounds instances building with GCC 11
597 [26690] stdio: Aliasing violation in __vfscanf_internal
598 [26691] nptl: Use a minimum guard size of 64 KiB on aarch64
599 [26726] build: GCC warning calling new_composite_name with an array of
601 [26736] libc: FAIL: misc/tst-sysvshm-linux
602 [26737] libc: Random FAIL: rt/tst-shm
603 [26791] libc: Missing O_CLOEXEC in sysconf.c
604 [26798] dynamic-link: aarch64: variant PCS symbols may be incorrectly
606 [26801] nptl: pthread_mutex_clocklock with CLOCK_MONOTONIC can fail on
608 [26818] string: aarch64: string tests may run ifunc variants that are
610 [26821] libc: Memory leak test failures on Fedora 33
611 [26824] libc: FAIL: elf/tst-cpu-features-supports with recent trunk:
612 FSGSBASE/LM/RDRAND check failure
613 [26833] time: adjtime() with delta == NULL segfaults on armv7 32bit
615 [26853] libc: aarch64: Missing unwind information in statically linked
617 [26923] locale: Assertion failure in iconv when converting invalid
618 UCS4 (CVE-2020-29562)
619 [26926] dynamic-link: aarch64: library dependencies are not bti
621 [26932] libc: sh: Multiple floating point functions defined as stubs
623 [26964] nptl: pthread_mutex_timedlock returning EAGAIN after futex is
625 [26988] dynamic-link: aarch64: BTI mprotect address is not page
627 [27002] build: libc_freeres_fn build failure with GCC 11
628 [27004] dynamic-link: ld.so is miscompiled by GCC 11
629 [27008] dynamic-link: ld.so.cache should have endianness markup
630 [27042] libc: [alpha] anonymous union in struct stat confuses
632 [27053] libc: Conformance regression in system(3) (and probably also
634 [27072] dynamic-link: static pie ifunc resolvers run before hwcap is
636 [27077] network: Do not reload /etc/nsswitch.conf from chroot
637 [27083] libc: Unsafe unbounded alloca in addmntent
638 [27104] dynamic-link: The COMMON_CPUID_INDEX_MAX handshake does not
640 [27130] string: "rep movsb" performance issue
641 [27150] libc: alpha: wait4() is unavailable in static linking
642 [27177] dynamic-link:
643 GLIBC_TUNABLES=glibc.cpu.x86_ibt=on:glibc.cpu.x86_shstk=on doesn't
645 [27222] dynamic-link: Incorrect sysdeps/x86/tst-cpu-features-cpuinfo.c
646 [27237] malloc: deadlock in malloc/tst-malloc-stats-cancellation
647 [27256] locale: Assertion failure in ISO-2022-JP-3 gconv module
648 related to combining characters (CVE-2021-3326)
655 * Unicode 13.0.0 Support: Character encoding, character type info, and
656 transliteration tables are all updated to Unicode 13.0.0, using
657 generator scripts contributed by Mike FABIAN (Red Hat).
659 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
661 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
662 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
663 Three ABIs are supported:
669 The arc* ABIs are little-endian while arceb is big-endian. All ABIs use
670 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
672 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
673 DT_DEPAUDIT dynamic section entries of the main executable.
675 * powerpc64le supports IEEE128 long double libm/libc redirects when
676 using -mabi=ieeelongdouble to compile C code on supported GCC
677 toolchains. It is recommended to use GCC 8 or newer when testing
680 * To help detect buffer overflows and other out-of-bounds accesses
681 several APIs have been annotated with GCC 'access' attribute. This
682 should help GCC 10 issue better warnings.
684 * On Linux, functions pthread_attr_setsigmask_np and
685 pthread_attr_getsigmask_np have been added. They allow applications
686 to specify the signal mask of a thread created with pthread_create.
688 * The GNU C Library now provides the header file <sys/single_threaded.h>
689 which declares the variable __libc_single_threaded. Applications are
690 encouraged to use this variable for single-thread optimizations,
691 instead of weak references to symbols historically defined in
694 * The functions sigabbrev_np and sigdescr_np have been added. The
695 sigabbrev_np function returns the abbreviated signal name (e.g. "HUP" for
696 SIGHUP) while sigdescr_np returns a string describing the signal number
697 (e.g "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
698 attempt to translate the return description, both functions return
699 NULL for an invalid signal number.
701 They should be used instead of sys_siglist or sys_sigabbrev and they
702 are both thread and async-signal safe. These functions are GNU extensions.
704 * The functions strerrorname_np and strerrordesc_np have been added. The
705 strerroname_np function returns error number name (e.g. "EINVAL" for EINVAL)
706 while strerrordesc_np returns a string describing the error number
707 (e.g "Invalid argument" for EINVAL). Different than strerror,
708 strerrordesc_np does not attempt to translate the return description, both
709 functions return NULL for an invalid error number.
711 They should be used instead of sys_errlist and sys_nerr, both are
712 thread and async-signal safe. These functions are GNU extensions.
714 * AArch64 now supports standard branch protection security hardening
715 in glibc when it is built with a GCC that is configured with
716 --enable-standard-branch-protection (or if -mbranch-protection=standard
717 flag is passed when building both GCC target libraries and glibc,
718 in either case a custom GCC is needed). This includes branch target
719 identification (BTI) and pointer authentication for return addresses
720 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
721 extensions respectively for the protection to be effective,
722 otherwise the used instructions are nops. User code can use PAC-RET
723 without libc support, but BTI requires a libc that is built with BTI
724 support, otherwise runtime objects linked into user code will not be
727 Deprecated and removed features, and other changes affecting compatibility:
729 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
730 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
731 RPC header files. Backward compatibility for old programs is kept
732 only for architectures and ABIs that have been added in or before
733 glibc 2.31. New programs need to use TI-RPC
734 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
735 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
737 * Remove configure option --enable-obsolete-nsl. libnsl is only built
738 as shared library for backward compatibility and the NSS modules "nis"
739 and "nisplus" are not built at all and libnsl's headers aren't
740 installed. This compatibility is kept only for architectures and ABIs
741 that have been added in or before version 2.28. Replacement
742 implementations based on TI-RPC, which additionally support IPv6, are
743 available from <https://github.com/thkukuk/>. This change does not
744 affect the "compat" NSS module, which does not depend on libnsl
745 since 2.27 and thus can be used without NIS.
747 * The deprecated <sys/sysctl.h> header and the sysctl function have been
748 removed. To support old binaries, the sysctl function continues to
749 exist as a compatibility symbol (on those architectures which had it),
750 but always fails with ENOSYS. This reflects the removal of the system
751 call from all architectures, starting with Linux 5.5.
753 * The sstk function is no longer available to newly linked binaries.
754 Its implementation always returned with a failure, and the function
755 was not declared in any header file.
757 * The legacy signal handling functions siginterrupt, sigpause, sighold,
758 sigrelse, sigignore and sigset, and the sigmask macro have been
759 deprecated. Applications should use the sigsuspend, sigprocmask and
760 sigaction functions instead.
762 * ldconfig now defaults to the new format for ld.so.cache. glibc has
763 already supported this format for almost 20 years.
765 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
766 are no longer available to newly linked binaries, and their declarations
767 have been removed from <string.h>. They are exported solely as
768 compatibility symbols to support old binaries. All programs should use
771 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
772 are no longer available to newly linked binaries, and their declarations
773 have been removed from <stdio.h>. They are exported solely as
774 compatibility symbols to support old binaries. All programs should use
775 strerror or strerror_r instead.
777 * Both strerror and strerror_l now share the same internal buffer in the
778 calling thread, meaning that the returned string pointer may be invalided
779 or contents might be overwritten on subsequent calls in the same thread or
780 if the thread is terminated. It makes strerror MT-safe.
782 * Using weak references to libpthread functions such as pthread_create
783 or pthread_key_create to detect the singled-threaded nature of a
784 program is an obsolescent feature. Future versions of glibc will
785 define pthread_create within libc.so.6 itself, so such checks will
786 always flag the program as multi-threaded. Applications should check
787 the __libc_single_threaded variable declared in
788 <sys/single_threaded.h> instead.
790 * The "files" NSS module no longer supports the "key" database (used for
791 secure RPC). The contents of the /etc/publickey file will be ignored,
792 regardless of the settings in /etc/nsswitch.conf. (This method of
793 storing RPC keys only supported the obsolete and insecure AUTH_DES
794 flavor of secure RPC.)
796 * The __morecore and __after_morecore_hook malloc hooks and the default
797 implementation __default_morecore have been deprecated. Applications
798 should use malloc interposition to change malloc behavior, and mmap to
799 allocate anonymous memory. A future version of glibc may require that
800 applications which use the malloc hooks must preload a special shared
801 object, to enable the hooks.
803 * The hesiod NSS module has been deprecated and will be removed in a
804 future version of glibc. System administrators are encouraged to
805 switch to other approaches for networked account databases, such as
808 Changes to build and runtime requirements:
810 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
811 long double redirects.
813 Security related changes:
815 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
816 invoked with the -c option and when processing invalid multi-byte input
817 sequences. Reported by Jan Engelhardt.
819 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
820 corruption when they were passed a pseudo-zero argument. Reported by Guido
821 Vranken / ForAllSecure Mayhem.
823 CVE-2020-1752: A use-after-free vulnerability in the glob function when
824 expanding ~user has been fixed.
826 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
827 memmove functions has been fixed. Discovered by Jason Royes and Samual
828 Dytrych of the Cisco Security Assessment and Penetration Team (See
831 The following bugs are resolved with this release:
833 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
834 [10441] manual: Backtraces code example lacks error checking
835 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
836 timer_sigev_thread dangerous
837 [14231] stdio: stdio-common tests memory requirements
838 [14578] libc: /proc-based emulation for lchmod, fchmodat
839 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
840 filtee has constructor
841 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
842 sequences (CVE-2016-10228)
843 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
844 character entities for infinity & pi
845 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
846 segfaults in applications
847 [20543] libc: Please move from .gnu.linkonce to comdat
848 [22489] network: gcc warns about implicit convertion in
849 ICMP6_FILTER_SETPASS with -Wsign-conversion
850 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
851 [23294] math: Complex _FloatN functions are redirected to the wrong
852 function with -mlong-double-64
853 [23296] libc: Data race in setting function descriptor during lazy
855 [23668] dynamic-link: ldconfig: Default to the new format for
857 [23819] hurd: hurd: Add C11 thread support
858 [23990] build: test-container error out on failure to exec child.
859 [23991] build: shell-container typo in run_command_array
860 [24638] manual: Error in example of parsing a template string
861 [24654] manual: Wrong declaration of wcschr in libc manual
862 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
864 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
865 dynamically loaded dsos
866 [25098] nptl: nptl: ctype classification functions are not AS-Safe
867 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
869 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
870 restore EAX, ECX and EDX
871 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
872 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
873 [25420] network: Race condition in resolv_conf.c can result in caching
874 stale configuration forever
875 [25487] math: sinl() stack corruption from crafted input
877 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
879 [25523] libc: MIPS/Linux inline syscall template is miscompiled
880 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
882 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
883 on 32 bit and old kernel
884 [25635] libc: arm: Wrong sysdep order selection for soft-fp
885 [25639] localedata: Some names of days and months wrongly spelt in
887 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
888 amount of sigset_t bytes
889 [25691] stdio: printf: memory leak when printing long multibyte
891 [25715] libc: system() returns wrong errors when posix_spawn fails
892 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
893 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
894 state for conversions that produce two Unicode code points
895 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
896 for linux x86_64 leads to livelock
897 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
898 test failures, invalid instruction in ld.so
899 [25790] glob: Typo in tst-fnmatch.input
900 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
902 [25819] localedata: Update locale data to Unicode 13.0.0
903 [25824] libc: Abnormal function of strnlen in aarch64
904 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
905 [25896] libc: Incorrect prctl
906 [25902] libc: Bad LOADARGS_N
907 [25905] dynamic-link: VSX registers are corrupted during PLT
908 resolution when glibc is built with --disable-multi-arch and --with-
910 [25933] string: Off by one error in __strncmp_avx2 when
911 length=VEC_SIZE*4 and strings are at page boundaries can cause a
913 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
914 exiting detached thread
915 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
917 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
919 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
920 [26073] math: getpayload() has wrong return value
921 [26076] dynamic-link: dlmopen crashes after failing to load
922 dependencies in audit mode
923 [26120] localedata: column width of of some Korean
924 JUNGSEONG/JONGSEONG characters wrong (should be 0)
925 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
926 [26133] libc: Incorrect need_arch_feature_F16C
927 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
929 [26149] libc: PKU is usable only if OSPKE is set
930 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
932 [26208] libc: Incorrect bit_cpu_CLFSH
933 [26210] network: Incorrect use of hidden symbols for global sunrpc
935 [26211] stdio: printf integer overflow calculating allocation size
936 [26214] stdio: printf_fp double free
937 [26215] stdio: printf_fp memory leak
938 [26232] time: FAIL: support/tst-timespec for 32-bit targets
939 [26258] nss: nss_compat should not read input files with mmap
940 [26332] string: Incorrect cache line size load causes memory
948 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
949 enable features from the draft ISO C2X standard. Only some features from
950 this draft standard are supported by the GNU C Library, and as the draft
951 is under active development, the set of features enabled by this macro is
952 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
953 by compiling with "gcc -std=gnu2x".
955 * The <math.h> functions that round their results to a narrower type now
956 have corresponding type-generic macros in <tgmath.h>, as defined in TS
957 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
958 Clarification Request 13 to TS 18661-3.
960 * The function pthread_clockjoin_np has been added, enabling join with a
961 terminated thread with a specific clock. It allows waiting against
962 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
964 * New locale added: mnw_MM (Mon language spoken in Myanmar).
966 * The DNS stub resolver will optionally send the AD (authenticated data) bit
967 in queries if the trust-ad option is set via the options directive in
968 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
969 mode, the AD bit, as provided by the name server, is available to
970 applications which call res_search and related functions. In the default
971 mode, the AD bit is not set in queries, and it is automatically cleared in
972 responses, indicating a lack of DNSSEC validation. (Therefore, the name
973 servers and the network path to them are treated as untrusted.)
975 Deprecated and removed features, and other changes affecting compatibility:
977 * The totalorder and totalordermag functions, and the corresponding
978 functions for other floating-point types, now take pointer arguments to
979 avoid signaling NaNs possibly being converted to quiet NaNs in argument
980 passing. This is in accordance with the resolution of Clarification
981 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
982 floating-point arguments directly will continue to work.
984 * The obsolete function stime is no longer available to newly linked
985 binaries, and its declaration has been removed from <time.h>.
986 Programs that set the system time should use clock_settime instead.
988 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
989 in a future version of glibc. In this release, the header still exists
990 but calling ftime will cause a compiler warning. All programs should use
991 gettimeofday or clock_gettime instead.
993 * The gettimeofday function no longer reports information about a
994 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
995 many years, as it cannot handle the full complexity of the world's
996 timezones, but hitherto we have supported it on a best-effort basis.
997 Changes required to support 64-bit time_t on 32-bit architectures have
998 made this no longer practical.
1000 As of this release, callers of gettimeofday with a non-null 'tzp' argument
1001 should expect to receive a 'struct timezone' whose tz_minuteswest and
1002 tz_dsttime fields are zero. (For efficiency reasons, this does not always
1003 happen on a few Linux-based ports. This will be corrected in a future
1006 All callers should supply a null pointer for the 'tzp' argument to
1007 gettimeofday. For accurate information about the time zone associated
1008 with the current time, use the localtime function.
1010 gettimeofday itself is obsolescent according to POSIX. We have no plans
1011 to remove access to this function, but portable programs should consider
1012 using clock_gettime instead.
1014 * The settimeofday function can still be used to set a system-wide time
1015 zone when the operating system supports it. This is because the Linux
1016 kernel reused the API, on some architectures, to describe a system-wide
1017 time-zone-like offset between the software clock maintained by the kernel,
1018 and the "RTC" clock that keeps time when the system is shut down.
1020 However, to reduce the odds of this offset being set by accident,
1021 settimeofday can no longer be used to set the time and the offset
1022 simultaneously. If both of its two arguments are non-null, the call
1023 will fail (setting errno to EINVAL).
1025 Callers attempting to set this offset should also be prepared for the call
1026 to fail and set errno to ENOSYS; this already happens on the Hurd and on
1027 some Linux architectures. The Linux kernel maintainers are discussing a
1028 more principled replacement for the reused API. After a replacement
1029 becomes available, we will change settimeofday to fail with ENOSYS on all
1030 platforms when its 'tzp' argument is not a null pointer.
1032 settimeofday itself is obsolescent according to POSIX. Programs that set
1033 the system time should use clock_settime and/or the adjtime family of
1034 functions instead. We may cease to make settimeofday available to newly
1035 linked binaries after there is a replacement for Linux's time-zone-like
1038 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
1039 the optional CAS instruction is implemented (for instance, LEON processors
1040 are still supported, but SuperSPARC processors are not).
1042 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
1045 * If a lazy binding failure happens during dlopen, during the execution of
1046 an ELF constructor, the process is now terminated. Previously, the
1047 dynamic loader would return NULL from dlopen, with the lazy binding error
1048 captured in a dlerror message. In general, this is unsafe because
1049 resetting the stack in an arbitrary function call is not possible.
1051 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
1052 executable stack unless explicitly configured at build time to require
1053 minimum kernel version 4.8 or newer. This is because executing
1054 floating-point branches on a non-executable stack on Linux kernels prior to
1055 4.8 can lead to application crashes for some MIPS configurations. While
1056 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
1057 expected to enable non-executable stack by default with PT_GNU_STACK by
1058 default and is thus likely to trigger a crash on older kernels.
1060 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
1061 non-executable stack while dropping support for older kernels.
1063 * System call wrappers for time system calls now use the new time64 system
1064 calls when available. On 32-bit targets, these wrappers attempt to call
1065 the new system calls first and fall back to the older 32-bit time system
1066 calls if they are not present. This may cause issues in environments
1067 that cannot handle unsupported system calls gracefully by returning
1068 -ENOSYS. Seccomp sandboxes are affected by this issue.
1070 Changes to build and runtime requirements:
1072 * It is no longer necessary to have recent Linux kernel headers to build
1073 working (non-stub) system call wrappers on all architectures except 64-bit
1074 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
1076 * The ChangeLog file is no longer present in the toplevel directory of the
1077 source tree. ChangeLog files are located in the ChangeLog.old directory as
1078 ChangeLog.N where the highest N has the latest entries.
1080 Security related changes:
1082 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
1083 out-of-bounds write when executed in a signal frame context.
1085 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
1086 environment variable during program execution after a security
1087 transition, allowing local attackers to restrict the possible mapping
1088 addresses for loaded libraries and thus bypass ASLR for a setuid
1089 program. Reported by Marcin Kościelnicki.
1091 The following bugs are resolved with this release:
1093 [12031] localedata: iconv -t ascii//translit with Greek characters
1094 [15813] libc: Multiple issues in __gen_tempname
1095 [17726] libc: [arm, sparc] profil_counter should be compat symbol
1096 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
1097 [19767] libc: vdso is not used with static linking
1098 [19903] hurd: Shared mappings not being inherited by children processes
1099 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
1100 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
1102 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
1103 Symbols-A/B Unicode blocks
1104 [23518] libc: Eliminate __libc_utmp_jump_table
1105 [24026] malloc: malloc_info() returns wrong numbers
1106 [24054] localedata: Many locales are missing date_fmt
1107 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
1108 [24304] dynamic-link: Lazy binding failure during ELF
1109 constructors/destructors is not fatal
1110 [24376] libc: RISC-V symbol size confusion with _start
1111 [24682] localedata: zh_CN first weekday should be Monday per GB/T
1113 [24824] libc: test-in-container does not install charmap files compatible
1115 [24844] regex: regex bad pointer / leakage if malloc fails
1116 [24867] malloc: Unintended malloc_info formatting changes
1117 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
1118 [24880] libc: login: utmp implementation uses struct flock with fcntl64
1119 [24882] libc: login: pututline uses potentially outdated cache
1120 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
1121 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
1123 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
1125 [24930] dynamic-link: dlopen of PIE executable can result in
1126 _dl_allocate_tls_init assertion failure
1127 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
1128 (stringop-overflow error)
1129 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
1130 functions other can lead to crashes
1131 [24967] libc: jemalloc static linking causes runtime failure
1132 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
1134 [25035] libc: sbrk() failure handled poorly in tunables_strdup
1135 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
1136 [25097] libc: new -Warray-bounds with GCC 10
1137 [25112] dynamic-link: dlopen must not make new objects accessible when it
1138 still can fail with an error
1139 [25139] localedata: Please add the new mnw_MM locale
1140 [25149] regex: Array bounds violation in proceed_next_node
1141 [25157] dynamic-link: Audit cookie for the dynamic loader is not
1142 initialized correctly
1143 [25189] libc: glibc's __glibc_has_include causes issues with clang
1145 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
1146 value to an unsigned
1147 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
1148 binaries (CVE-2019-19126)
1149 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
1151 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
1153 [25232] string: <string.h> does not enable const correctness for strchr et
1155 [25233] localedata: Consider "." as the thousands separator for sl_SI
1157 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
1158 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
1159 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
1161 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
1162 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
1164 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
1165 (dl_initfirst) link map pointer
1166 [25401] malloc: pvalloc must not have __attribute_alloc_size__
1167 [25423] libc: Array overflow in backtrace on powerpc
1168 [25425] network: Missing call to __resolv_context_put in
1169 getaddrinfo.c:gethosts
1176 * Unicode 12.1.0 Support: Character encoding, character type info, and
1177 transliteration tables are all updated to Unicode 12.1.0, using
1178 generator scripts contributed by Mike FABIAN (Red Hat).
1180 * The dynamic linker accepts the --preload argument to preload shared
1181 objects, in addition to the LD_PRELOAD environment variable.
1183 * The twalk_r function has been added. It is similar to the existing
1184 twalk function, but it passes an additional caller-supplied argument
1185 to the callback function.
1187 * On Linux, the getdents64, gettid, and tgkill functions have been added.
1189 * Minguo (Republic of China) calendar support has been added as an
1190 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
1193 * The entry for the new Japanese era has been added for ja_JP locale.
1195 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
1196 pvalloc, memalign, and posix_memalign fail now with total object size
1197 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
1198 pointer subtraction within the allocated object, where results might
1199 overflow the ptrdiff_t type.
1201 * The dynamic linker no longer refuses to load objects which reference
1202 versioned symbols whose implementation has moved to a different soname
1203 since the object has been linked. The old error message, symbol
1204 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
1205 link time reference, is gone.
1207 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
1208 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
1209 functions. These behave similarly to their "timed" equivalents, but also
1210 accept a clockid_t parameter to determine which clock their timeout should
1211 be measured against. All functions allow waiting against CLOCK_MONOTONIC
1212 and CLOCK_REALTIME. The decision of which clock to be used is made at the
1213 time of the wait (unlike with pthread_condattr_setclock, which requires
1214 the clock choice at initialization time).
1216 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
1217 work, new resolvers can use a second argument which can be extended in
1218 the future, currently it contains the AT_HWCAP2 value.
1220 Deprecated and removed features, and other changes affecting compatibility:
1222 * The copy_file_range function fails with ENOSYS if the kernel does not
1223 support the system call of the same name. Previously, user space
1224 emulation was performed, but its behavior did not match the kernel
1225 behavior, which was deemed too confusing. Applications which use the
1226 copy_file_range function can no longer rely on glibc to provide a fallback
1227 on kernels that do not support the copy_file_range system call, and if
1228 this function returns ENOSYS, they will need to use their own fallback.
1229 Support for copy_file_range for most architectures was added in version
1230 4.5 of the mainline Linux kernel.
1232 * The functions clock_gettime, clock_getres, clock_settime,
1233 clock_getcpuclockid, clock_nanosleep were removed from the librt library
1234 for new applications (on architectures which had them). Instead, the
1235 definitions in libc will be used automatically, which have been available
1238 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
1239 and <sys/stropts.h> have been removed.
1241 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
1242 resolver flag (deprecated in glibc 2.25) have been removed.
1244 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
1245 resolver have been removed from <resolv.h>.
1247 * With --enable-bind-now, installed programs are now linked with the
1250 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
1251 configurations) has been removed, following the deprecation of this
1252 subarchitecture in version 8 of GCC, and its removal in version 9.
1254 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
1255 header have been removed.
1257 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
1258 deprecated and will be removed from a future version of glibc.
1259 Application should directly access /proc instead. For obtaining random
1260 bits, the getentropy function can be used.
1262 Changes to build and runtime requirements:
1264 * GCC 6.2 or later is required to build the GNU C Library.
1266 Older GCC versions and non-GNU compilers are still supported when
1267 compiling programs that use the GNU C Library.
1269 Security related changes:
1271 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
1272 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
1273 has undefined behavior. On x32, the size_t argument may be passed
1274 in the lower 32 bits of the 64-bit RDX register with non-zero upper
1275 32 bits. When it happened with the sign bit of RDX register set,
1276 memcmp gave the wrong result since it treated the size argument as
1277 zero. Reported by H.J. Lu.
1279 CVE-2019-9169: Attempted case-insensitive regular-expression match
1280 via proceed_next_node in posix/regexec.c leads to heap-based buffer
1281 over-read. Reported by Hongxu Chen.
1283 The following bugs are resolved with this release:
1285 [2872] locale: Transliteration Cyrillic -> ASCII fails
1286 [6399] libc: gettid() should have a wrapper
1287 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
1288 [16976] glob: fnmatch unbounded stack VLA for collating symbols
1289 [17396] localedata: globbing for locale by [[.collating-element.]]
1290 [18035] dynamic-link: pldd does no longer work, enters infinite loop
1291 [18465] malloc: memusagestat is built using system C library
1292 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
1293 invalid input drops valid char
1294 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
1295 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
1296 [21897] localedata: Afar locales: Fix mon, abmon, and abday
1297 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
1298 [23352] malloc: __malloc_check_init still defined in public header
1300 [23403] nptl: Wrong alignment of TLS variables
1301 [23501] libc: nftw() doesn't return dangling symlink's inode
1302 [23733] malloc: Check the count before calling tcache_get()
1303 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
1305 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
1306 [23844] nptl: pthread_rwlock_trywrlock results in hang
1307 [23983] argparse: Missing compat versions of argp_failure and argp_error
1308 for long double = double
1309 [23984] libc: Missing compat versions of err.h and error.h functions for
1310 long double = double
1311 [23996] localedata: Dutch salutations
1312 [24040] libc: riscv64: unterminated call chain in __thread_start
1313 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
1315 [24051] stdio: puts and putchar output to _IO_stdout instead of stdout
1316 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
1318 [24114] regex: regexec buffer read overrun in "grep -i
1319 '\(\(\)*.\)*\(\)\(\)\1'"
1320 [24122] libc: Segfaults if 0 returned from la_version
1321 [24153] stdio: Some input functions do not react to stdin assignment
1322 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
1323 RDX is set) (CVE-2019-7309)
1324 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
1325 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
1326 not the default "nor"
1327 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
1328 false positives, change to modern flexible array
1329 [24180] nptl: pthread_mutex_trylock does not use the correct order of
1330 instructions while maintaining the robust mutex list due to missing
1332 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
1333 unnecessary librt dependencies
1334 [24200] localedata: Revert first_weekday removal in en_IE locale
1335 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
1336 [24215] nptl: pthread_timedjoin_np should be a cancellation point
1337 [24216] malloc: Check for large bin list corruption when inserting
1339 [24228] stdio: old x86 applications that use legacy libio crash on exit
1340 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
1342 [24293] localedata: Missing Minguo calendar support for TW locales
1343 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
1344 tt_RU (Tatar) locale
1345 [24307] localedata: Update locale data to Unicode 12.0.0
1346 [24323] dynamic-link: dlopen should not be able open PIE objects
1347 [24335] build: "Obsolete types detected" with Linux 5.0 headers
1348 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
1349 tt_RU (Tatar) locale
1350 [24370] localedata: Add lang_name for tt_RU locale
1351 [24372] locale: Binary locale files are not architecture independent
1352 [24394] time: strptime %Ey mis-parses final year of era
1353 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
1355 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
1357 [24531] malloc: Malloc tunables give tcache assertion failures
1358 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
1360 [24535] localedata: Update locale data to Unicode 12.1.0
1361 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
1362 kernels and break testing
1363 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
1364 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
1365 [-Werror=format-overflow=]
1366 [24570] libc: alpha: compat msgctl uses __IPC_64
1367 [24584] locale: Data race in __wcsmbs_clone_conv
1368 [24588] stdio: Remove codecvt vtables from libio
1369 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
1371 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
1372 [24632] stdio: Old binaries which use freopen with default stdio handles
1374 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
1376 [24652] localedata: szl_PL spelling correction
1377 [24695] nss: nss_db: calling getpwent after endpwent crashes
1378 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
1379 in /etc/nsswitch.conf
1380 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
1381 [24740] libc: getdents64 type confusion
1382 [24741] dynamic-link: ld.so should not require that a versioned symbol is
1383 always implemented in the same library
1384 [24744] libc: Remove copy_file_range emulation
1385 [24757] malloc: memusagestat is linked against system libpthread
1386 [24794] libc: Partial test suite run builds corrupt test-in-container
1394 * The getcpu wrapper function has been added, which returns the currently
1395 used CPU and NUMA node. This function is Linux-specific.
1397 * A new convenience target has been added for distribution maintainers
1398 to build and install all locales as directories with files. The new
1399 target is run by issuing the following command in your build tree:
1400 'make localedata/install-locale-files', with an optional DESTDIR
1401 to set the install root if you wish to install into a non-default
1402 configured location.
1404 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
1406 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
1407 for _GNU_SOURCE, to match BSD environments.
1409 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
1410 indicates that it will abort the transaction prior to entering the kernel
1411 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
1412 suspended, and this caused some undefined side-effects issues by aborting
1413 transactions manually. Glibc avoided it by abort transactions manually on
1414 each syscall, but it lead to performance issues on newer kernels where the
1415 HTM state is saved and restore lazily (the state being saved even when the
1416 process actually does not use HTM).
1418 * The functions posix_spawn_file_actions_addchdir_np and
1419 posix_spawn_file_actions_addfchdir_np have been added, enabling
1420 posix_spawn and posix_spawnp to run the new process in a different
1421 directory. These functions are GNU extensions. The function
1422 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
1425 * The popen and system do not run atfork handlers anymore (BZ#17490).
1426 Although it is a possible POSIX violation, the POSIX rationale in
1427 pthread_atfork documentation regarding atfork handlers is to handle
1428 inconsistent mutex state after a fork call in a multi-threaded process.
1429 In both popen and system there is no direct access to user-defined mutexes.
1431 * Support for the C-SKY ABIV2 running on Linux has been added. This port
1432 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
1434 - C-SKY ABIV2 soft-float little-endian
1435 - C-SKY ABIV2 hard-float little-endian
1437 * strftime's default formatting of a locale's alternative year (%Ey)
1438 has been changed to zero-pad the year to a minimum of two digits,
1439 like "%y". This improves the display of Japanese era years during
1440 the first nine years of a new era, and is expected to be harmless
1441 for all other locales (only Japanese locales regularly have
1442 alternative year numbers less than 10). Zero-padding can be
1443 overridden with the '_' or '-' flags (which are GNU extensions).
1445 * As a GNU extension, the '_' and '-' flags can now be applied to
1446 "%EY" to control how the year number is formatted; they have the
1447 same effect that they would on "%Ey".
1449 Deprecated and removed features, and other changes affecting compatibility:
1451 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
1452 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
1454 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
1455 in <sys/procfs.h>, has been corrected to match the type actually used by
1456 the Linux kernel. This affects the size and layout of that structure on
1457 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
1459 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
1460 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
1461 defined in <sys/procfs.h>, has been corrected to match the type actually
1462 used by the Linux kernel. This affects the size and layout of those
1465 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
1466 meant to scan a string and allocate space for it with malloc, is now
1467 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
1468 defined. This extension conflicts with C99's use of '%a' to scan a
1469 hexadecimal floating-point number, which is now available to programs
1470 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
1472 POSIX.1-2008 includes the feature of allocating a buffer for string input
1473 with malloc, using the modifier letter 'm' instead. Programs using
1474 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
1475 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
1476 C99 '%a' no longer need to avoid _GNU_SOURCE.
1478 GCC's -Wformat warnings can detect most uses of this extension, as long
1479 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
1480 __attribute__ ((format (scanf, ...))).
1482 Changes to build and runtime requirements:
1484 * Python 3.4 or later is required to build the GNU C Library.
1486 * On most architectures, GCC 5 or later is required to build the GNU C
1487 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
1489 Older GCC versions and non-GNU compilers are still supported when
1490 compiling programs that use the GNU C Library.
1492 Security related changes:
1494 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
1495 denial of service due to resource exhaustion when processing getaddrinfo
1496 calls with crafted host names. Reported by Guido Vranken.
1498 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
1499 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
1500 happened, accessing the 32-bit size_t value as the full 64-bit register
1501 in the assembly string/memory functions would cause a buffer overflow.
1502 Reported by H.J. Lu.
1504 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
1505 addresses with arbitrary trailing characters, potentially leading to data
1506 or command injection issues in applications.
1508 The following bugs are resolved with this release:
1510 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
1511 [10496] localedata: 12h time representation in multiple locales faulty
1512 [10797] localedata: it_IT locale numeric does not have a separator for
1514 [11319] libc: dprintf doesn't handle errors properly
1515 [16346] time: mktime: potentially unsafe use of localtime_offset
1516 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
1518 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
1519 posix_spawn_file_actions_addfchdir_np
1520 [17426] localedata: Indian locales: set the correct date format
1521 [17490] stdio: popen should not invoke atfork handlers
1522 [17783] libc: TIOCSER_TEMT conditions inconsistent
1523 [18040] regex: use-after-free in regexec/get_subexp
1524 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
1525 [20018] network: getaddrinfo should reject IP addresses with trailing
1526 characters (CVE-2016-10739)
1527 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
1528 [20271] libc: Missing "\n" in __libc_fatal calls
1529 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
1530 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
1531 pointer argument is non-NULL
1532 [21037] stdio: open_memstream and freopen
1533 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
1534 [21716] time: Crash in glibc's mktime in low-memory situations
1535 [22834] stdio: Subprocess forked by popen may crash in Linux when
1536 multithreads call popen
1537 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
1538 and pthread_create fails.
1539 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
1540 [23125] libc: riscv64: endless loop when throwing an exception from a
1542 [23275] nptl: Race in pthread_mutex_lock while promoting to
1543 PTHREAD_MUTEX_ELISION_NP.
1544 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
1546 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
1548 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
1550 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
1551 [23509] dynamic-link: CET enabled glibc is incompatible with the older
1553 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
1554 [23521] nss: get_next_alias nss_files file stream leak
1555 [23538] nptl: Hang in pthread_cond_broadcast
1556 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
1557 [23578] regex: Invalid memory access if regex pattern contains NUL byte
1558 [23579] libc: Errors misreported in preadv2
1559 [23597] build: support/test-container.c doesn't work with different
1561 [23603] time: mktime signed integer overflow on large timestamps
1562 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
1563 [23614] libc: powerpc: missing CFI register information in __mpn_*
1565 [23637] string: Generic strstr/strcasestr fails with huge needles
1566 [23640] libc: no way to easily clear FD_CLOEXEC in
1567 posix_spawn_file_actions_adddup2()
1568 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
1570 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
1572 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
1573 [23689] libc: Bug in documentation for rusage.ru_ixrss in
1574 bits/types/struct_rusage.h
1575 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
1577 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
1579 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
1580 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
1581 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
1583 [23724] localedata: Albanian date formats are incorrect
1584 [23735] math: libnldbl_nonshared.a references internal libm symbols
1585 [23740] localedata: kl_GL: Month names and date formats need update
1586 [23744] regex: regex refactorings to remove BE, avoid duplication
1587 [23745] time: mktime fix for Gnulib + coreutils
1588 [23758] time: Improve the width of alternate representation for year in
1590 [23783] libc: [mips] Missing CMSPAR bits/termios.h
1591 [23789] time: mktime does not set errno on failure
1592 [23791] localedata: Wrong monetary format for ca_ES locale
1593 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
1594 [23794] locale: c16rtomb does not handle surrogate pairs
1595 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
1596 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
1597 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
1598 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
1599 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
1600 [23862] libc: [sh] missing kernel-features.h undefines
1601 [23864] libc: [riscv] missing kernel-features.h undefines
1602 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
1603 [23907] malloc: Incorrect double-free malloc tcache check disregards
1605 [23913] libc: off-by-one in function maybe_script_execute in
1606 sysdeps/posix/spawni.c
1607 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
1608 [23923] locale: Add --no-hard-links option to localedef
1609 [23927] network: Linux if_nametoindex() does not close descriptor
1611 [23961] math: powf can overflow to inf without setting errno in non-
1612 nearest rounding mode
1613 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
1614 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
1615 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
1616 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
1617 [24011] localedata: Fixed small type in comment for locale bs_BA
1618 [24018] libc: gettext() may return NULL
1619 [24022] build: riscv build failure with Linux kernel 4.20-rc7
1620 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
1621 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
1623 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
1624 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
1626 [24046] localedata: en_US locale doesn't define date_fmt
1627 [24063] manual: @var{errno} should be @code{errno}
1628 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
1629 [24088] libc: VSCR field is not being correctly read in ucontext_t on
1631 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
1633 [24097] string: Can't use 64-bit register for size_t in assembly codes for
1635 [24110] hurd: SS_DISABLE never set in stack_t value returned by
1637 [24112] network: Do not send DNS queries for non-host names (where all
1638 answers will be rejected)
1639 [24130] libc: alpha __remqu corrupts $f3 register
1646 * The localization data for ISO 14651 is updated to match the 2016
1647 Edition 4 release of the standard, this matches data provided by
1648 Unicode 9.0.0. This update introduces significant improvements to the
1649 collation of Unicode characters. This release deviates slightly from
1650 the standard in that the collation element ordering for lowercase and
1651 uppercase LATIN script characters is adjusted to ensure that regular
1652 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
1653 is not matched by [a-z]. With the update many locales have been
1654 updated to take advantage of the new collation information. The new
1655 collation information has increased the size of the compiled locale
1656 archive or binary locales.
1658 * The GNU C Library can now be compiled with support for Intel CET, AKA
1659 Intel Control-flow Enforcement Technology. When the library is built
1660 with --enable-cet, the resulting glibc is protected with indirect
1661 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
1662 compatible with all existing executables and shared libraries. This
1663 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
1664 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
1665 capable of multi-byte NOPs, like x86-64 processors as well as Intel
1666 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
1667 x86_64 and x32 on non-CET processors. --enable-cet has been tested
1668 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
1671 * The GNU C Library now has correct support for ABSOLUTE symbols
1672 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
1673 relocated incorrectly or in some cases discarded. The GNU linker can
1674 make use of the newer semantics, but it must communicate it to the
1675 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
1676 field) to indicate such support is required.
1678 * Unicode 11.0.0 Support: Character encoding, character type info, and
1679 transliteration tables are all updated to Unicode 11.0.0, using
1680 generator scripts contributed by Mike FABIAN (Red Hat).
1682 * <math.h> functions that round their results to a narrower type are added
1683 from TS 18661-1:2014 and TS 18661-3:2015:
1685 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
1686 fMxaddfNx functions.
1688 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
1689 fMxsubfNx functions.
1691 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
1692 fMxmulfNx functions.
1694 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
1695 fMxdivfNx functions.
1697 * Two grammatical forms of month names are now supported for the following
1698 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
1699 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
1700 support two grammatical forms in abbreviated month names: Catalan, Greek,
1703 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
1704 include the support for two grammatical forms of month names.
1706 * Building and running on GNU/Hurd systems now works without out-of-tree
1709 * The renameat2 function has been added, a variant of the renameat function
1710 which has a flags argument. If the flags are zero, the renameat2 function
1711 acts like renameat. If the flag is not zero and there is no kernel
1712 support for renameat2, the function will fail with an errno value of
1713 EINVAL. This is different from the existing gnulib function renameatu,
1714 which performs a plain rename operation in case of a RENAME_NOREPLACE
1715 flags and a non-existing destination (and therefore has a race condition
1716 that can clobber the destination inadvertently).
1718 * The statx function has been added, a variant of the fstatat64
1719 function with an additional flags argument. If there is no direct
1720 kernel support for statx, glibc provides basic stat support based on
1721 the fstatat64 function.
1723 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
1724 library if installed. libidn2 version 2.0.5 or later is recommended. If
1725 libidn2 is not available, internationalized domain names are not encoded
1726 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
1727 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
1728 with an encoding error.) Flags which used to change the IDN encoding and
1729 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
1730 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
1731 deprecated. They no longer have any effect.
1733 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
1734 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
1735 range of ELF gABI expressions including such constructs as
1736 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
1737 have been further restricted, and where in the past a dynamic string
1738 token sequence may have been interpreted as a literal string it will
1739 now cause a load failure. These load failures were always considered
1740 unspecified behaviour from the perspective of the dynamic loader, and
1741 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
1742 results in a load failure now.
1744 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
1745 implementation includes all the standard functions provided by
1748 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
1749 thrd_detach, thrd_exit, and thrd_join for thread management.
1751 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
1752 mtx_destroy for mutual exclusion.
1754 - call_once for function call synchronization.
1756 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
1757 cnd_wait for conditional variables.
1759 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
1761 Application developers must link against libpthread to use ISO C threads.
1763 Deprecated and removed features, and other changes affecting compatibility:
1765 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
1766 installed. Software that was using either header should be updated to
1767 use standard <stdio.h> interfaces instead.
1769 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
1770 This was never required by the C standard, and the macros just expanded
1771 to call alternative names for the same functions. If you hoped getc and
1772 putc would provide performance improvements over fgetc and fputc, instead
1773 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
1774 necessary, flockfile and funlockfile.
1776 * All stdio functions now treat end-of-file as a sticky condition. If you
1777 read from a file until EOF, and then the file is enlarged by another
1778 process, you must call clearerr or another function with the same effect
1779 (e.g. fseek, rewind) before you can read the additional data. This
1780 corrects a longstanding C99 conformance bug. It is most likely to affect
1781 programs that use stdio to read interactive input from a terminal.
1784 * The macros 'major', 'minor', and 'makedev' are now only available from
1785 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
1786 headers that happen to include <sys/types.h>. These macros are rarely
1787 used, not part of POSIX nor XSI, and their names frequently collide with
1788 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
1789 further explanation.
1791 <sys/sysmacros.h> is a GNU extension. Portable programs that require
1792 these macros should first include <sys/types.h>, and then include
1793 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
1795 * The tilegx*-*-linux-gnu configurations are no longer supported.
1797 * The obsolete function ustat is no longer available to newly linked
1798 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
1799 function has been deprecated in favor of fstatfs and statfs.
1801 * The obsolete function nfsservctl is no longer available to newly linked
1802 binaries. This function was specific to systems using the Linux kernel
1803 and could not usefully be used with the GNU C Library on systems with
1804 version 3.1 or later of the Linux kernel.
1806 * The obsolete function name llseek is no longer available to newly linked
1807 binaries. This function was specific to systems using the Linux kernel
1808 and was not declared in a header. Programs should use the lseek64 name
1809 for this function instead.
1811 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
1812 getaddrinfo and getnameinfo functions have been deprecated. The behavior
1813 previously selected by them is now always enabled.
1815 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
1816 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
1817 restriction (rejecting '_' in host names, among other things) has been
1818 removed, for increased compatibility with non-IDN name resolution.
1820 * The fcntl function now have a Long File Support variant named fcntl64. It
1821 is added to fix some Linux Open File Description (OFD) locks usage on non
1822 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
1823 fcntl and LFS support is handled transparently. Also for Linux, the OFD
1824 locks act as a cancellation entrypoint.
1826 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
1827 ecb_crypt, and des_setparity are no longer available to newly linked
1828 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
1829 longer installed. These functions encrypted and decrypted data with the
1830 DES block cipher, which is no longer considered secure. Software that
1831 still uses these functions should switch to a modern cryptography library,
1834 * Reflecting the removal of the encrypt and setkey functions above, the
1835 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
1836 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1839 * The obsolete function fcrypt is no longer available to newly linked
1840 binaries. It was just another name for the standard function crypt,
1841 and it has not appeared in any header file in many years.
1843 * We have tentative plans to hand off maintenance of the passphrase-hashing
1844 library, libcrypt, to a separate development project that will, we hope,
1845 keep up better with new passphrase-hashing algorithms. We will continue
1846 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1847 'crypt_r' should not need to change at all; however, distributions will
1848 need to install <crypt.h> and libcrypt from a separate project.
1850 In this release, if the configure option --disable-crypt is used, glibc
1851 will not install <crypt.h> or libcrypt, making room for the separate
1852 project's versions of these files. The plan is to make this the default
1853 behavior in a future release.
1855 Changes to build and runtime requirements:
1857 GNU make 4.0 or later is now required to build glibc.
1859 Security related changes:
1861 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1862 been fixed by removing the glibc-internal IDNA implementation and using
1863 the system-provided libidn2 library instead. Originally reported by Hanno
1864 Böck and Christian Weisgerber.
1866 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1867 architecture could corrupt memory. Reported by Max Horn.
1869 CVE-2018-11236: Very long pathname arguments to realpath function could
1870 result in an integer overflow and buffer overflow. Reported by Alexey
1873 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1874 architecture could write beyond the target buffer, resulting in a buffer
1875 overflow. Reported by Andreas Schwab.
1877 The following bugs are resolved with this release:
1879 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1880 [6889] manual: 'PWD' mentioned but not specified
1881 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1882 when __WORDSIZE != 64
1883 [13762] regex: re_search etc. should return -2 on memory exhaustion
1884 [13888] build: /tmp usage during testing
1885 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1886 [14092] nptl: Support C11 threads
1887 [14095] localedata: Review / update collation data from Unicode / ISO
1889 [14508] libc: -Wformat warnings
1890 [14553] libc: Namespace pollution loff_t in sys/types.h
1891 [14890] libc: Make NT_PRFPREG canonical.
1892 [15105] libc: Extra PLT references with -Os
1893 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1895 [16335] manual: Feature test macro documentation incomplete and out of
1897 [16552] libc: Unify umount implementations in terms of umount2
1898 [17082] libc: htons et al.: statement-expressions prevent use on global
1899 scope with -O1 and higher
1900 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1901 [17438] localedata: pt_BR: wrong d_fmt delimiter
1902 [17662] libc: please implement binding for the new renameat2 syscall
1903 [17721] libc: __restrict defined as /* Ignore */ even in c11
1904 [17979] libc: inconsistency between uchar.h and stdint.h
1905 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1906 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1907 horrible machine code)
1908 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1910 [18471] libc: llseek should be a compat symbol
1911 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1913 [18991] nss: nss_files skips large entry in database
1914 [19239] libc: Including stdlib.h ends up with macros major and minor being
1916 [19463] libc: linknamespace failures when compiled with -Os
1917 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1918 [19527] locale: Normalized charset name not recognized by setlocale
1919 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1920 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1922 [19728] network: out of bounds stack read in libidn function
1923 idna_to_ascii_4i (CVE-2016-6261)
1924 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1925 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1926 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1928 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1929 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1930 [20419] dynamic-link: files with large allocated notes crash in
1932 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1933 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1934 [20980] manual: CFLAGS environment variable replaces vital options
1935 [21163] regex: Assertion failure in pop_fail_stack when executing a
1936 malformed regexp (CVE-2015-8985)
1937 [21234] manual: use of CFLAGS makes glibc detect no optimization
1938 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1939 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1940 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1941 [21508] locale: intl/tst-gettext failure with latest msgfmt
1942 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1943 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1944 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1946 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1948 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1949 [22247] network: Integer overflow in the decode_digit function in
1950 puny_decode.c in libidn (CVE-2017-14062)
1951 [22342] nscd: NSCD not properly caching netgroup
1952 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1953 [22550] localedata: es_ES locale (and other es_* locales): collation
1954 should treat ñ as a primary different character, sync the collation
1955 for Spanish with CLDR
1956 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1957 by gcc configured with --enable-default-pie
1958 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1959 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1960 crossing 2GB threshold (CVE-2017-18269)
1961 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1963 [22735] time: Misleading typo in time.h source comment regarding
1965 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1966 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1967 `__assert_perror_fail ()' to `__assert_fail_base ()'
1968 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1970 [22786] libc: Stack buffer overflow in realpath() if input size is close
1971 to SSIZE_MAX (CVE-2018-11236)
1972 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1973 through an absolute DT_NEEDED path
1974 [22792] build: tcb-offsets.h dependency dropped
1975 [22797] libc: pkey_get() uses non-reserved name of argument
1976 [22807] libc: PTRACE_* constants missing for powerpc
1977 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1978 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1979 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1980 [22848] localedata: ca_ES: update date definitions from CLDR
1981 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1982 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1983 [22896] localedata: Update locale data for an_ES
1984 [22902] math: float128 test failures with GCC 8
1985 [22918] libc: multiple common of `__nss_shadow_database'
1986 [22919] libc: sparc32: backtrace yields infinite backtrace with
1988 [22926] libc: FTBFS on powerpcspe
1989 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1991 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1992 [22947] libc: FAIL: misc/tst-preadvwritev2
1993 [22963] localedata: cs_CZ: Add alternative month names
1994 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1995 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1996 [22998] dynamic-link: execstack tests are disabled when SELinux is
1998 [23005] network: Crash in __res_context_send after memory allocation
2000 [23007] math: strtod cannot handle -nan
2001 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
2002 [23036] regex: regex equivalence class regression
2003 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
2004 [23069] libc: sigaction broken on riscv64-linux-gnu
2005 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
2006 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
2007 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
2008 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
2009 and libc build with -Os)
2010 [23140] localedata: More languages need two forms of month names
2011 [23145] libc: _init/_fini aren't marked as hidden
2012 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
2013 [23171] math: C++ iseqsig for long double converts arguments to double
2014 [23178] nscd: sudo will fail when it is run in concurrent with commands
2015 that changes /etc/passwd
2016 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
2018 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
2019 [23208] localedata: New locale - Lower Sorbian (dsb)
2020 [23233] regex: Memory leak in build_charclass_op function in file
2022 [23236] stdio: Harden function pointers in _IO_str_fields
2023 [23250] nptl: Offset of __private_ss differs from GCC
2024 [23253] math: tgamma test suite failures on i686 with -march=x86-64
2025 -mtune=generic -mfpmath=sse
2026 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
2028 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
2029 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
2031 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
2032 [23277] math: nan function should not have const attribute
2033 [23279] math: scanf and strtod wrong for some hex floating-point
2034 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
2036 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
2037 [23303] build: undefined reference to symbol
2038 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
2039 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
2041 [23313] stdio: libio vtables validation and standard file object
2043 [23329] libc: The __libc_freeres infrastructure is not properly run across
2045 [23349] libc: Various glibc headers no longer compatible with
2047 [23351] malloc: Remove unused code related to heap dumps and malloc
2049 [23363] stdio: stdio-common/tst-printf.c has non-free license
2050 [23396] regex: Regex equivalence regression in single-byte locales
2051 [23422] localedata: oc_FR: More updates of locale data
2052 [23442] build: New warning with GCC 8
2053 [23448] libc: Out of bounds access in IBM-1390 converter
2054 [23456] libc: Wrong index_cpu_LZCNT
2055 [23458] build: tst-get-cpu-features-static isn't added to tests
2056 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
2058 [23467] dynamic-link: x86/CET: A property note parser bug
2065 * The GNU C Library can now be compiled with support for building static
2066 PIE executables (See --enable-static-pie in INSTALL). These static PIE
2067 executables are like static executables but can be loaded at any address
2068 and provide additional security hardening benefits at the cost of some
2069 memory and performance. When the library is built with --enable-static-pie
2070 the resulting libc.a is usable with GCC 8 and above to create static PIE
2071 executables using the GCC option '-static-pie'. This feature is currently
2072 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
2073 aarch64 with binutils 2.30 or later.
2075 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
2076 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
2079 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
2081 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
2083 * In order to support faster and safer process termination the malloc API
2084 family of functions will no longer print a failure address and stack
2085 backtrace after detecting heap corruption. The goal is to minimize the
2086 amount of work done after corruption is detected and to avoid potential
2087 security issues in continued process execution. Reducing shutdown time
2088 leads to lower overall process restart latency, so there is benefit both
2089 from a security and performance perspective.
2091 * The abort function terminates the process immediately, without flushing
2092 stdio streams. Previous glibc versions used to flush streams, resulting
2093 in deadlocks and further data corruption. This change also affects
2094 process aborts as the result of assertion failures.
2096 * On platforms where long double has the IEEE binary128 format (aarch64,
2097 alpha, mips64, riscv, s390 and sparc), the math library now implements
2098 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
2099 These are the same interfaces added in version 2.26 for some platforms where
2100 this format is supported but is not the format of long double.
2102 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
2103 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
2104 implements interfaces for that type, as defined by ISO/IEC TS
2105 18661-3:2015. These are corresponding interfaces to those supported for
2108 * The math library now implements interfaces for the _Float32, _Float64 and
2109 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
2110 corresponding interfaces to those supported for _Float128.
2112 * glibc now implements the memfd_create and mlock2 functions on Linux.
2114 * Support for memory protection keys was added. The <sys/mman.h> header now
2115 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
2118 * The copy_file_range function was added.
2120 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
2122 * The ldconfig utility now processes `include' directives using the C/POSIX
2123 collation ordering. Previous glibc versions used locale-specific
2124 ordering, the change might break systems that relied on that.
2126 * Support for two grammatical forms of month names has been added.
2127 In a call to strftime, the "%B" and "%b" format specifiers will now
2128 produce the grammatical form required when the month is used as part
2129 of a complete date. New "%OB" and "%Ob" specifiers produce the form
2130 required when the month is named by itself. For instance, in Greek
2131 and in many Slavic and Baltic languages, "%B" will produce the month
2132 in genitive case, and "%OB" will produce the month in nominative case.
2134 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
2135 are all valid and will all accept any known form of month
2136 name---standalone or complete, abbreviated or full. In a call to
2137 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
2138 the strings used by "%B" and "%b", respectively. New query
2139 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
2140 used by "%OB" and "%Ob", respectively.
2142 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
2143 define the strings for %OB and %Ob, respectively; these have the
2144 same syntax as "mon" and "abmon". These arrays are optional; if they
2145 are not provided then they have the same content as "mon" and "abmon",
2148 These features are provided for locales which define "alt_mon" and/or
2149 "ab_alt_mon" in their locale source data. This release includes such
2150 alternative month name data for the following languages: Belarusian,
2151 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
2153 This feature is currently a GNU extension, but it is expected to
2154 be added to the next revision of POSIX, and it is also already
2155 available on some BSD-derived operating systems.
2157 This feature will cause existing statically compiled applications
2158 to fail to load locales and fall back to the builtin C/POSIX locales.
2159 See notes below for other changes affecting compatibility.
2161 * Support for the RISC-V ISA running on Linux has been added. This port
2162 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
2163 for the following ISA and ABI pairs:
2169 Deprecated and removed features, and other changes affecting compatibility:
2171 * Statically compiled applications attempting to load locales compiled for the
2172 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
2173 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
2174 support for two grammatical forms of the month names, also extends the locale
2175 data binary format. Static applications needing locale support must be
2176 recompiled to match the runtime and data they are deployed with. In some
2177 distributions there is an upgrade window where dynamically linked applications
2178 may use a new library but the old locale data and also fall back to the
2179 builtin C/POSIX locales; restarting the application process is sufficient to
2182 * Support for statically linked applications which call dlopen is deprecated
2183 and will be removed in a future version of glibc. Applications which call
2184 dlopen need to be linked dynamically instead.
2186 * Support for old programs which use internal stdio data structures and
2187 functions is deprecated. This includes programs which use the C++ streams
2188 provided by libstdc++ in GCC 2.95. Programs which use the internal
2189 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
2190 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
2191 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
2192 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
2193 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
2194 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
2195 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
2196 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
2197 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
2198 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
2199 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
2200 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
2201 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
2202 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
2203 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
2204 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
2205 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
2206 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
2207 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
2208 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
2209 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
2210 future version of glibc. Unlike other symbol removals, these old
2211 applications will not be supported using compatibility symbols.
2213 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
2214 defined by <sys/ptrace.h>.
2216 * libm no longer supports SVID error handling (calling a user-provided
2217 matherr function on error) or the _LIB_VERSION variable to control error
2218 handling. (SVID error handling and the _LIB_VERSION variable still work
2219 for binaries linked against older versions of the GNU C Library.) The
2220 libieee.a library is no longer provided. math.h no longer defines struct
2221 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
2222 TLOSS, PLOSS and HUGE.
2224 * The libm functions pow10, pow10f and pow10l are no longer supported for
2225 new programs. Programs should use the standard names exp10, exp10f and
2226 exp10l for these functions instead.
2228 * The mcontext_t type is no longer the same as struct sigcontext. On
2229 platforms where it was previously the same, this changes the C++ name
2230 mangling for interfaces involving this type.
2232 * The add-ons mechanism for building additional packages at the same time as
2233 glibc has been removed. The --enable-add-ons configure option is now
2236 * The --without-fp configure option is now ignored. Whether hardware
2237 floating-point instructions are used is now configured based on whether
2238 the compiler used at configure time (without any options implied by a
2239 --with-cpu= configure option) uses such instructions.
2241 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
2242 the specified string can be parsed as a domain name.
2244 * In the malloc_info output, the <heap> element may contain another <aspace>
2245 element, "subheaps", which contains the number of sub-heaps.
2247 * The libresolv function p_secstodate is no longer supported for new
2250 * The tilepro-*-linux-gnu configuration is no longer supported.
2252 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
2253 and will be removed in a future release. Software that is still using
2254 either header should be updated to use standard <stdio.h> interfaces
2257 libio.h was originally the header for a set of supported GNU extensions,
2258 but they have not been maintained as such in many years, they are now
2259 standing in the way of improvements to stdio, and we don't think there are
2260 any remaining external users. _G_config.h was never intended for public
2261 use, but predates the bits convention.
2263 Changes to build and runtime requirements:
2265 * bison version 2.7 or later is required to generate code in the 'intl'
2268 Security related changes:
2270 CVE-2009-5064: The ldd script would sometimes run the program under
2271 examination directly, without preventing code execution through the
2272 dynamic linker. (The glibc project disputes that this is a security
2273 vulnerability; only trusted binaries must be examined using the ldd
2276 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
2277 suffered from a one-byte overflow during ~ operator processing (either
2278 on the stack or the heap, depending on the length of the user name).
2279 Reported by Tim Rühsen.
2281 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
2282 would sometimes fail to free memory allocated during ~ operator
2283 processing, leading to a memory leak and, potentially, to a denial
2286 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
2287 without GLOB_NOESCAPE, could write past the end of a buffer while
2288 unescaping user names. Reported by Tim Rühsen.
2290 CVE-2017-17426: The malloc function, when called with an object size near
2291 the value SIZE_MAX, would return a pointer to a buffer which is too small,
2292 instead of NULL. This was a regression introduced with the new malloc
2293 thread cache in glibc 2.26. Reported by Iain Buclaw.
2295 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
2296 to the allocation of too much memory. (This is not a security bug per se,
2297 it is mentioned here only because of the CVE assignment.) Reported by
2300 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
2301 of the number of search path components. (This is not a security
2302 vulnerability per se because no trust boundary is crossed if the fix for
2303 CVE-2017-1000366 has been applied, but it is mentioned here only because
2304 of the CVE assignment.) Reported by Qualys.
2306 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
2307 for AT_SECURE or SUID binaries could be used to load libraries from the
2310 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
2311 succeeds without returning an absolute path due to unexpected behaviour
2312 of the Linux kernel getcwd syscall. Reported by halfdog.
2314 CVE-2018-6485: The posix_memalign and memalign functions, when called with
2315 an object size near the value of SIZE_MAX, would return a pointer to a
2316 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
2318 CVE-2018-6551: The malloc function, when called with an object size near
2319 the value of SIZE_MAX, would return a pointer to a buffer which is too
2320 small, instead of NULL.
2322 The following bugs are resolved with this release:
2324 [866] glob: glob should match dangling symlinks
2325 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
2326 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
2328 [5997] math: Very slow execution of sinf function
2329 [10580] localedata: hr_HR: updated locale
2330 [10871] locale: 'mon' array should contain both nominative and genitive
2332 [12349] localedata: eu_ES: incorrect thousands separator
2333 [13605] localedata: shn_MM: new Shan locale
2334 [13805] localedata: ru_RU: currency should use ',' as radix point
2335 [13953] localedata: km_KH: locale update
2336 [13994] localedata: mjw_IN: new locale
2337 [14121] build: make writes .mo files in po directory
2338 [14333] libc: Fix the race between atexit() and exit()
2339 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
2340 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
2342 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
2343 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
2344 width Latin characters
2345 [15332] localedata: es_CU: locale update
2346 [15436] stdio: Don't close or flush stdio streams on abort
2347 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
2349 [16148] localedata: ca_ES: incorrect thousands separator
2350 [16750] dynamic-link: ldd should not try to execute the binaries
2352 [16777] localedata: pl_PL: incorrect thousands separator in locale
2353 [16905] localedata: hanzi: new collation
2354 [17563] localedata: cmn_TW: add hanzi collation
2355 [17750] localedata: wrong collation order of diacritics in most locales
2356 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
2358 [17956] build: Build fails on missing definitions from header file
2359 nss/nss.h when Mozilla NSS is used for cryptography
2360 [18203] libc: realpath() does not handle unreachable paths correctly
2361 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
2362 [18812] localedata: kab_DZ: new Kabyle Algeria locale
2363 [18822] libc: Internal functions are called via PLT
2364 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
2365 [19170] libc: __gmon_start__ defined in hppa in crtn.S
2366 [19574] libc: glibc should support building static PIE binaries
2367 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
2369 [19971] glob: glob: Do not skip entries with zero d_ino values
2370 [19982] localedata: fr.po: spelling mistake for error code EXDEV
2371 [20008] localedata: km_KH: convert to translit_neutral
2372 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
2373 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
2374 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
2375 [20482] localedata: de_CH: abbreviated weekdays should be two letters
2376 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
2378 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
2379 they're set, wrong errors returned by gaih_inet when lookup functions
2381 [20756] localedata: [PATCH] Use Unicode wise thousands separator
2382 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
2384 [20952] localedata: yuw_PG: new locale
2385 [21084] localedata: charmaps/IBM858: new codepage
2386 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
2387 [21242] libc: assert gives pedantic warning in old gcc versions
2388 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
2389 __regcall calling convention
2390 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
2391 [21326] libc: C99 functions are not declared for C++11 and later if
2392 _GNU_SOURCE is not predefined by g++
2393 [21457] libc: sys/ucontext.h namespace
2394 [21530] libc: tmpfile() should be implemented using O_TMPFILE
2395 [21660] math: GCC fails to compile a formula with tgmath.h
2396 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
2397 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
2398 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
2399 [21684] math: tgmath.h handling of complex integers
2400 [21685] math: tgmath.h handling of bit-fields
2401 [21686] math: tgmath.h handling of __int128
2402 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2404 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
2406 [21750] localedata: column width of characters incompatible with classical
2408 [21754] malloc: malloc: Perform as little work as possible after heap
2409 consistency check failures
2410 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
2411 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
2412 [21791] string: Unused XXX_chk_XXX functions in libc.a
2413 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
2415 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
2417 [21845] localedata: Added new Locale bho_NP
2418 [21853] localedata: Fix abday Which looks same as day in zh_SG
2419 [21854] localedata: Added New Locale en_SC
2420 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
2421 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
2422 _dl_runtime_resolve_avx_slow
2423 [21885] network: getaddrinfo: gethosts does not release resolver context
2424 on memory allocation failure
2425 [21899] libc: XPG4.2 sigaction namespace
2426 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
2428 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
2430 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
2431 errno value, causing getaddrinfo to fail
2432 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
2433 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
2434 instead of EAI_NODATA
2435 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
2436 constant PTRACE_SEIZE_DEVEL
2437 [21930] math: C-only gcc builtins used in <math.h> isinf
2438 [21932] network: Unpaired __resolv_context_get in generic get*_r
2440 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
2441 [21944] libc: sigval namespace
2442 [21951] localedata: Update hanzi collation by stroke
2443 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
2444 sysdeps/x86_64/fpu/e_expf.S
2445 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
2446 allocation in syscall loops)
2447 [21959] localedata: Fix Country name for xh_ZA
2448 [21960] localedata: Fix abmon for bem_ZM
2449 [21966] math: AVX2 mathvec functions use FMA without checking
2450 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
2451 [21971] localedata: Added New Locale for mfe_MU
2452 [21972] libc: assert macro requires operator== (int) for its argument type
2453 [21973] math: [sparc] libm missing sqrtl compat symbol
2454 [21974] libc: Remove __bb_init_func and __bb_exit_func
2455 [21982] string: stratcliff.c: error: assuming signed overflow does not
2457 [21986] stdio: __guess_grouping is called incorrectly
2458 [21987] math: [sparc32] wrong bits/long-double.h installed
2459 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
2461 [22022] localedata: Missing country_name for mni_IN
2462 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
2464 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
2466 [22026] locale: iconv_open: heap overflow on gconv_init failure
2467 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
2468 [22035] math: [m68k] bits/math-inline.h macro namespace
2469 [22038] localedata: Fix abbreviated weeks and months for Somali
2470 [22044] localedata: Remove redundant data for Limburgish Language
2471 [22050] malloc: Linking with -lmcheck does not hook
2472 __malloc_initialize_hook correctly
2473 [22051] libc: zero terminator in the middle of glibc's .eh_frame
2474 [22052] malloc: malloc failed to compile with GCC 7 and -O3
2475 [22070] localedata: charmaps/UTF-8: wcwidth for
2476 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
2477 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
2478 Jungseong and Jongseong) should be 0
2479 [22078] nss: nss_files performance issue in multi mode
2480 [22082] math: bits/math-finite.h exp10 condition
2481 [22086] libc: pcprofiledump incorrect cross-endian condition
2482 [22093] dynamic-link: ld.so no longer searches in .../x86_64
2483 [22095] network: Name server address allocation memory leak in resolv.conf
2485 [22096] network: __resolv_conf_attach can incorrectly free passed conf
2487 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
2488 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
2490 [22111] malloc: malloc: per thread cache is not returned when thread exits
2491 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
2492 [22134] libc: [linux] implement fexecve with execveat
2493 [22142] libc: [powerpc] printf outputs a wrong value of DBL_MAX on ppc64 and
2495 [22145] libc: ttyname() gives up too early in the face of namespaces
2496 [22146] math: C++ build issue with float128 on x86_64
2497 [22153] nptl: nptl: save error code before process termination
2498 [22156] libc: [hppa,ia64,microblaze] Executable stack default
2499 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
2500 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
2501 [22165] libc: [hppa] Text relocations in libc.so
2502 [22180] libc: destructor registered via __cxa_atexit is called twice
2503 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
2504 symlinks") cause "make" segfaults
2505 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
2507 [22207] libc: FAIL: stdlib/test-atexit-race
2508 [22225] math: nearbyint arithmetic moved before feholdexcept
2509 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
2510 [22235] math: iscanonical in C++ and float128
2511 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
2512 the svid compat wrapper
2513 [22244] math: ynf and yn are wrong without the svid compat wrapper
2514 [22273] libc: Improper assert in Linux posix_spawn implementation
2515 [22284] libc: -pg -pie doesn't work
2516 [22292] locale: localedef exits with error 4 when it should be error 1
2517 [22294] locale: Allow "" for int_currency_symbol definition in locales.
2518 [22295] locale: Don't warn on non-symbolic characters in locale sources in
2520 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
2521 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
2523 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
2524 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
2525 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
2526 [22322] libc: [mips64] wrong bits/long-double.h installed
2527 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
2528 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
2530 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
2531 [22343] malloc: Integer overflow in posix_memalign
2532 [22347] libc: getrandom() returns the number of bytes that were copied to
2533 the buffer even though the comments say "Return 0 on success and -1 on
2535 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
2536 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
2538 [22370] dynamic-link: Incorrect note padding check
2539 [22375] libc: malloc returns pointer from tcache_get when should return
2540 NULL (CVE-2017-17426)
2541 [22377] math: iseqsig, float128 and C++
2542 [22382] localedata: Error in tpi_PG locale
2543 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
2544 inside the ASCII printable range
2545 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
2547 [22403] localedata: Slash needs escaping in some locales
2548 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
2549 [22409] network: res_hnok does not accept some host names used on the
2551 [22412] network: res_dnok, res_hnok should perform syntax checks
2552 [22413] network: ns_name_pton ignores syntactically invalid trailing
2554 [22415] stdio: setvbuf can lead to invalid free/segfault
2555 [22432] build: Non-deterministic build
2556 [22439] malloc: malloc_info should compute summary statistics for all sub-
2558 [22442] network: if_nametoindex could report index for the wrong
2559 networking interface
2560 [22446] build: aliasing violation calling readlink in handle_request
2561 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
2562 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
2563 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
2564 __nscd_hash/__nss_hash
2565 [22463] network: p_secstodate overflow handling
2566 [22469] localedata: pl_PL LC_COLLATE does not use i18n
2567 [22478] libc: sigwait can fail with EINTR
2568 [22505] libc: ldconfig processes include directive in locale-specific
2570 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
2571 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
2572 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
2573 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
2574 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
2575 [22534] localedata: Collation rules for Serbian and Bosnian should be the
2576 same as for Croatian
2577 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
2578 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
2579 [22577] libc: missing newline after "cannot allocate TLS data structures
2581 [22588] manual: manual/conf.texi: missing underscore in front of
2583 [22593] math: nextafter and nexttoward are declared with const attribute
2584 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
2585 [22603] string: ia64 memchr overflows internal pointer check
2586 [22605] libc: SH clone does not set the exit code correctly
2587 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
2589 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
2590 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
2591 modified in case of success
2592 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
2593 [22615] manual: manual: ambiguous wording about errno value in case of
2595 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
2597 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
2598 binaries or if /proc is not mounted (CVE-2017-16997)
2599 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
2600 [22630] build: $(no-pie-ldflag) is no longer effective
2601 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
2602 [22635] nptl: pthread_self returns NULL before libpthread is loaded
2603 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
2604 [22637] nptl: guard size is subtracted from thread stack size instead of
2606 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
2607 [22657] localedata: hu_HU: Avoid double space in date
2608 [22660] math: fmax, fmin sNaN handling on alpha
2609 [22664] libc: New warning of GCC8
2610 [22665] math: alpha: ceil and floor raise inexact exceptions
2611 [22666] math: alpha: trunc raise inexact exceptions
2612 [22667] libc: makecontext lacks stack alignment on i386
2613 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
2614 [22679] libc: getcwd(3) can succeed without returning an absolute path
2616 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
2617 elision and tunables
2618 [22687] math: [powerpc-nofpu] complex long double functions spurious
2620 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
2621 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
2622 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
2624 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
2625 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
2627 [22701] nis: Incomplete removal of libnsl
2628 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
2629 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
2630 [22715] dynamic-link: FAIL: elf/tst-audit10
2631 [22719] libc: Backtrace tests fail on hppa
2632 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
2633 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
2634 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
2635 before the first call to crypt_r () in crypt/badsalttest.c
2642 * A per-thread cache has been added to malloc. Access to the cache requires
2643 no locks and therefore significantly accelerates the fast path to allocate
2644 and free small amounts of memory. Refilling an empty cache requires locking
2645 the underlying arena. Performance measurements show significant gains in a
2646 wide variety of user workloads. Workloads were captured using a special
2647 instrumented malloc and analyzed with a malloc simulator. Contributed by
2648 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
2650 * Unicode 10.0.0 Support: Character encoding, character type info, and
2651 transliteration tables are all updated to Unicode 10.0.0, using
2652 generator scripts contributed by Mike FABIAN (Red Hat).
2653 These updates cause user visible changes, especially the changes in
2654 wcwidth for many emoji characters cause problems when emoji sequences
2655 are rendered with pango, see for example:
2656 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
2658 * Collation of Hungarian has been overhauled and is now consistent with "The
2659 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
2662 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
2664 - The GNU C Library will now detect when /etc/resolv.conf has been
2665 modified and reload the changed configuration. The new resolver option
2666 “no-reload” (RES_NORELOAD) disables this behavior.
2668 - The GNU C Library now supports an arbitrary number of search domains
2669 (configured using the “search” directive in /etc/resolv.conf);
2670 previously, there was a hard limit of six domains. For backward
2671 compatibility, applications that directly modify the ‘_res’ global
2672 object are still limited to six search domains.
2674 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
2675 Library will now randomly pick a name server from the configuration as a
2676 starting point. (Previously, the second name server was always used.)
2678 * The tunables feature is now enabled by default. This allows users to tweak
2679 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
2681 * New function reallocarray, which resizes an allocated block (like realloc)
2682 to the product of two sizes, with a guaranteed clean failure upon integer
2683 overflow in the multiplication. Originally from OpenBSD, contributed by
2684 Dennis Wölfing and Rüdiger Sonderfeld.
2686 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
2687 These are extended versions of preadv and pwritev, respectively, taking an
2688 additional flags argument. The set of supported flags depends on the
2689 running kernel; full support currently requires kernel 4.7 or later.
2691 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
2692 create a new session ID for the spawned process. This feature is
2693 scheduled to be added to the next major revision of POSIX; for the time
2694 being, it is available under _GNU_SOURCE.
2696 * errno.h is now safe to use from C-preprocessed assembly language on all
2697 supported operating systems. In this context, it will only define the
2698 Exxxx constants, as preprocessor macros expanding to integer literals.
2700 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
2701 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
2702 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
2703 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
2705 To compile programs that use this feature, the compiler must support
2706 128-bit floating point with the type name _Float128 (as defined by TS
2707 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
2708 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
2709 must be defined to make the new interfaces visible.
2711 The new functions and macros correspond to those present for other
2712 floating-point types (except for a few obsolescent interfaces not
2713 supported for the new type), with F128 or f128 suffixes; for example,
2714 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
2715 printf or scanf formats for the new type; the strfromf128 and strtof128
2716 interfaces should be used instead.
2718 Deprecated and removed features, and other changes affecting compatibility:
2720 * The synchronization that pthread_spin_unlock performs has been changed to
2721 now be equivalent to a C11 atomic store with release memory order to the
2722 spin lock's memory location. Previously, several (but not all)
2723 architectures used stronger synchronization (e.g., containing what is
2724 often called a full barrier). This change can improve performance, but
2725 may affect odd fringe uses of spin locks that depend on the previous
2726 behavior (e.g., using spin locks as atomic variables to try to implement
2727 Dekker's mutual exclusion algorithm).
2729 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
2732 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
2733 will only be built and installed when the GNU C Library is configured with
2734 --enable-obsolete-rpc. This allows alternative RPC implementations, such
2735 as TIRPC or rpcsvc-proto, to be used.
2737 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
2738 libnss_compat, are deprecated, and will not be built or installed by
2741 The NIS(+) support library, libnsl, is also deprecated. By default, a
2742 compatibility shared library will be built and installed, but not headers
2743 or development libraries. Only a few NIS-related programs require this
2744 library. (In particular, the GNU C Library has never required programs
2745 that use 'gethostbyname' to be linked with libnsl.)
2747 Replacement implementations based on TIRPC, which additionally support
2748 IPv6, are available from <https://github.com/thkukuk/>. The configure
2749 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
2750 name service modules, to be built and installed.
2752 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
2753 support is enabled, the configured recursive resolver must support EDNS.
2754 (Responding to EDNS-enabled queries with responses which are not
2755 EDNS-enabled is fine, but FORMERR responses are not.)
2757 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
2758 servers have not supported this opcode for a long time.
2760 * The _res_opcodes variable has been removed from libresolv. It had been
2761 exported by accident.
2763 * <string.h> no longer includes inline versions of any string functions,
2764 as this kind of optimization is better done by the compiler. The macros
2765 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
2767 * The nonstandard header <xlocale.h> has been removed. Most programs should
2768 use <locale.h> instead. If you have a specific need for the definition of
2769 locale_t with no other declarations, please contact
2770 libc-alpha@sourceware.org and explain.
2772 * The obsolete header <sys/ultrasound.h> has been removed.
2774 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
2776 * The obsolete function cfree has been removed. Applications should use
2779 * The stack_t type no longer has the name struct sigaltstack. This changes
2780 the C++ name mangling for interfaces involving this type.
2782 * The ucontext_t type no longer has the name struct ucontext. This changes
2783 the C++ name mangling for interfaces involving this type.
2785 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
2786 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
2787 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
2788 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
2789 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
2790 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
2791 fpregset_t type no longer has the name struct fpu. This changes the C++
2792 name mangling for interfaces involving those types.
2794 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
2795 synced with the kernel:
2797 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
2798 are not supported on this architecture and have been removed.
2800 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
2801 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
2802 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
2804 Programs that assume the GET/SETREGS ptrace requests are universally
2805 available will now fail to build, instead of malfunctioning at runtime.
2807 Changes to build and runtime requirements:
2809 * Linux kernel 3.2 or later is required at runtime, on all architectures
2810 supported by that kernel. (This is a change from version 2.25 only for
2813 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
2815 * On most architectures, GCC 4.9 or later is required to build the GNU C
2816 Library. On powerpc64le, GCC 6.2 or later is required.
2818 Older GCC versions and non-GNU compilers are still supported when
2819 compiling programs that use the GNU C Library. (We do not know exactly
2820 how old, and some GNU extensions to C may be _de facto_ required. If you
2821 are interested in helping us make this statement less vague, please
2822 contact libc-alpha@sourceware.org.)
2824 Security related changes:
2826 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
2827 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
2829 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
2830 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
2832 * Avoid printing a backtrace from the __stack_chk_fail function since it is
2833 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
2836 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
2837 fixed (CVE-2017-12133).
2839 The following bugs are resolved with this release:
2841 [984] network: Respond to changed resolv.conf in gethostbyname
2842 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2843 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2845 [12189] libc: __stack_chk_fail should not attempt a backtrace
2847 [14096] time: Race condition on timezone/tst-timezone.out
2848 [14172] localedata: az_IR: new locale
2849 [14995] build: glibc fails to build if gold is the default linker, even if
2851 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2852 [16637] network: inet_pton function is accepting IPv6 with bad format
2853 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2854 x86 and other generic code
2855 [16875] localedata: ko_KR: fix lang_name
2856 [17225] localedata: ar_SY: localized month names for May and June are
2858 [17297] localedata: da_DK: wrong date_fmt string
2859 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2860 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2861 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2862 [19066] localedata: ar_SA abbreviated day and month names are in English
2863 [19569] network: resolv: Support an arbitrary number of search domains
2864 [19570] network: Implement random DNS server selection in the stub
2866 [19838] locale: localedef fails on PA-RISC
2867 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2868 order of 0D36 and 0D37
2869 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2871 [20098] libc: FAIL: debug/backtrace-tst on hppa
2872 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2874 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2876 [20313] localedata: Update locale data to Unicode 9.0
2877 [20424] manual: Document how to provide a malloc replacement
2878 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2880 [20686] locale: Add el_GR@euro to SUPPORTED.
2881 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2882 failures consistently
2883 [21015] dynamic-link: Document and fix --enable-bind-now
2884 [21016] nptl: pthread_cond support is broken on hppa
2885 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2886 frame-pointer on i386
2887 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2889 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2890 [21088] libc: Build fails with --enable-static-nss
2891 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2892 generic c code is used
2893 [21109] libc: Tunables broken on big-endian
2894 [21112] math: powf has large ulp errors with base close to 1 and exponent
2896 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2898 [21120] malloc: glibc malloc is incompatible with GCC 7
2899 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2901 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2902 (-0.0) when linking with -lieee
2903 [21171] math: log10, log2 and lgamma return incorrect results
2904 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2905 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2906 [21207] localedata: ce_RU: update weekdays from CLDR
2907 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2908 [21217] localedata: Update months from CLDR-31
2909 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2910 [21243] libc: support_delete_temp_file should issue warning for failed
2912 [21244] libc: support resolv_test_start() socket fd close should be
2914 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2915 new posix_spawn implementation
2916 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2917 leads to lower CPU frequency
2918 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2919 [21261] libc: [sparc64] bits/setjmp.h namespace
2920 [21267] network: [mips] bits/socket.h IOC* namespace
2921 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2922 [21270] libc: mmap64 silently truncates large offset values
2923 [21275] libc: posix_spawn always crashes on ia64 now
2924 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2925 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2926 [21289] libc: Incorrect declaration for 32-bit platforms with
2927 _FILE_OFFSET_BITS=64 causes build error
2928 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2929 not support gethostbyname4_r
2930 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2932 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2934 [21340] libc: Support POSIX_SPAWN_SETSID
2935 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2936 [21359] network: ns_name_pack needs additional byte in destination buffer
2937 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2938 against fragmentation attacks (CVE-2017-12132)
2939 [21369] network: resolv: Remove EDNS fallback
2940 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2942 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2943 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2944 [21393] stdio: Missing dup3 error check in freopen, freopen64
2945 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2946 [21399] localedata: Bad description for U00EC in
2947 localedata/charmaps/CP1254
2948 [21411] malloc: realloc documentation error
2949 [21426] network: sys/socket.h uio.h namespace
2950 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2951 [21445] libc: signal.h bsd_signal namespace
2952 [21455] network: Network headers stdint.h namespace
2953 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2955 [21475] network: resolv: Overlong search path is truncated mid-label
2956 [21511] libc: sigstack namespace
2957 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2958 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2959 bits/syscall.h: No such file or directory
2960 [21517] libc: struct sigaltstack namespace
2961 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2962 [21533] localedata: Update locale data to Unicode 10.0
2964 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2965 junk at end of line, first unrecognized character is `@'
2966 [21538] libc: SIG_HOLD missing for XPG4
2967 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2968 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2969 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2970 [21543] libc: sigevent namespace
2971 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2972 size for general purpose registers in mcontext_t structure
2973 [21550] libc: sigwait namespace
2974 [21552] libc: XPG4 bsd_signal namespace
2975 [21554] libc: sigpause namespace
2976 [21560] libc: sys/wait.h signal.h namespace
2977 [21561] libc: waitid namespace
2978 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2979 '/usr/include/stdlib.h': Permission denied
2980 [21575] libc: sys/wait.h missing struct rusage definition
2981 [21584] libc: sigaltstack etc namespace
2982 [21597] libc: siginterrupt namespace
2983 [21607] math: hppa: FAIL: math/test-tgmath
2984 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2986 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2987 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2988 stack and heap (CVE-2017-1000366)
2989 [21625] libc: wait3 namespace
2990 [21654] nss: Incorrect pointer alignment in NSS group merge result
2992 [21657] network: Parse interface zone id for node-local multicast
2993 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2995 [21666] libc: .symver is used on common symbol
2996 [21668] network: resolv: res_init cross-thread broadcast introduces race
2998 [21687] math: tgmath.h totalorder, totalordermag return type
2999 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
3001 [21696] libc: Incorrect assumption of of __cpu_mask in
3002 posix/sched_cpucount.c
3003 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
3004 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
3006 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
3007 leading to relocation crash
3008 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
3009 `resolv_conf_matches (resp, conf)' failed.
3010 [21710] localedata: Added Samoan language locale for Samoa
3011 [21711] localedata: Pashto yesstr/nostr locale are missing
3012 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
3013 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
3014 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
3015 [21723] localedata: yesstr/nostr missing for Chinese language locale
3016 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
3018 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
3020 [21728] localedata: New Locale for Tongan language
3021 [21729] localedata: incorrect LC_NAME fields for hi_IN
3022 [21733] localedata: yesstr and nostr are missing for zh_HK
3023 [21734] localedata: Missing yesstr and nostr are for kw_GB
3024 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
3025 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
3026 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
3027 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
3029 [21744] libc: Tests failing on --enable-tunables --enable-stack-
3031 [21749] localedata: Wrong abbreviated day name (“abday”) for
3033 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
3034 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
3035 [21759] localedata: missing yesstr and nostr for Tigrinya
3036 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
3037 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
3038 [21767] localedata: Missing Bislama locales
3039 [21768] localedata: Missing yesstr and nostr for aa_ET
3040 [21770] localedata: Missing Field in li_NL
3041 [21778] nptl: Robust mutex may deadlock
3042 [21779] libc: MicroBlaze segfaults when loading libpthread
3043 [21783] localedata: Fix int_select international_call_prefixes
3044 [21784] localedata: Inconsistency in country_isbn
3045 [21788] localedata: Missing Country Postal Abbreviations
3046 [21794] localedata: Added-country_isbn-for-Italy
3047 [21795] localedata: Add/Fix country_isbn for France
3048 [21796] localedata: Added country_isbn for Republic of Korea
3049 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
3050 [21799] localedata: Added int_select international_call_prefixes
3051 [21801] localedata: Added int_select international_call_prefixes
3052 [21804] nptl: Double semicolon in thread-shared-types.h
3053 [21807] localedata: LC_ADDRESS fix for pap_CW
3054 [21808] localedata: Fix LC_ADDRESS for pap_AW
3055 [21821] localedata: Added country_name in mai_IN
3056 [21822] localedata: Fix LC_TIME for mai_IN
3057 [21823] localedata: missing yesstr, nostr for sa_IN
3058 [21825] localedata: Fix name_mrs for mag_IN
3059 [21828] localedata: 2.26 changelog should mention user visible changes
3061 [21835] localedata: Added Maithili language locale for Nepal
3062 [21838] localedata: Removed redundant data for the_NP
3063 [21839] localedata: Fix LC_MONETARY for ta_LK
3064 [21844] localedata: Fix Latin characters and Months Sequence.
3065 [21848] localedata: Fix mai_NP Title Name
3070 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
3071 24731-2:2010, is supported to enable declarations of functions from that
3072 TR. Note that not all functions from that TR are supported by the GNU C
3075 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
3076 18661-1:2014, is supported to enable declarations of functions and macros
3077 from that TS. Note that not all features from that TS are supported by
3080 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
3081 18661-4:2015, is supported to enable declarations of functions and macros
3082 from that TS. Note that most features from that TS are not supported by
3085 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
3086 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
3087 Since the GNU C Library defaults to a much newer revision of POSIX, this
3088 will only affect programs that specifically request an old conformance
3089 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
3090 see a change in the visible declarations, but a program compiled with
3091 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
3094 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
3095 defined by all multithreaded code, but glibc has not required this for
3098 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
3099 means that in a future release, the macros “major”, “minor”, and “makedev”
3100 will only be available from <sys/sysmacros.h>.
3102 These macros are not part of POSIX nor XSI, and their names frequently
3103 collide with user code; see for instance glibc bug 19239 and Red Hat bug
3104 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
3105 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
3108 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
3109 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
3110 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
3112 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
3113 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
3114 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
3115 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
3116 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
3117 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
3118 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
3119 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
3120 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
3121 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
3122 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
3125 * New <math.h> features are added from TS 18661-1:2014:
3127 - Signaling NaN macros: SNANF, SNAN, SNANL.
3129 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
3130 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
3131 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
3133 - llogb functions: the llogb, llogbf and llogbl functions, and the
3134 FP_LLOGB0 and FP_LLOGBNAN macros.
3136 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
3139 - Comparison macros: iseqsig.
3141 - Classification macros: iscanonical, issubnormal, iszero.
3143 - Total order functions: totalorder, totalorderf, totalorderl,
3144 totalordermag, totalordermagf, totalordermagl.
3146 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
3148 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
3149 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
3151 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
3152 are added to libc. They convert a floating-point number into string.
3154 * Most of glibc can now be built with the stack smashing protector enabled.
3155 It is recommended to build glibc with --enable-stack-protector=strong.
3156 Implemented by Nick Alcock (Oracle).
3158 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
3159 intended to be used instead of memset() to erase sensitive data after use;
3160 the compiler will not optimize out calls to explicit_bzero even if they
3161 are "unnecessary" (in the sense that no _correct_ program can observe the
3162 effects of the memory clear).
3164 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
3165 to float instead of double. This does not affect the ABI of any libraries
3166 that are part of the GNU C Library, but may affect the ABI of other
3167 libraries that use this type in their interfaces.
3169 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
3170 float_t and double_t types are now defined to long double instead of float
3171 and double. These options are not the default, and this does not affect
3172 the ABI of any libraries that are part of the GNU C Library, but it may
3173 affect the ABI of other libraries that use this type in their interfaces,
3174 if they are compiled or used with those options.
3176 * The getentropy and getrandom functions, and the <sys/random.h> header file
3179 * The buffer size for byte-oriented stdio streams is now limited to 8192
3180 bytes by default. Previously, on Linux, the default buffer size on most
3181 file systems was 4096 bytes (and thus remains unchanged), except on
3182 network file systems, where the buffer size was unpredictable and could be
3183 as large as several megabytes.
3185 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
3186 for the Linux quota interface which predates kernel version 2.4.22 has
3189 * The malloc_get_state and malloc_set_state functions have been removed.
3190 Already-existing binaries that dynamically link to these functions will
3191 get a hidden implementation in which malloc_get_state is a stub. As far
3192 as we know, these functions are used only by GNU Emacs and this change
3193 will not adversely affect already-built Emacs executables. Any undumped
3194 Emacs executables, which normally exist only during an Emacs build, should
3195 be rebuilt by re-running “./configure; make” in the Emacs build tree.
3197 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
3198 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
3199 “no-ip6-dotint” had already been the default, and support for the
3200 “ip6-dotint” option was removed from the Internet in 2006.
3202 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
3203 flag from <resolv.h> have been removed. The option relied on a
3204 backwards-incompatible DNS extension which was never deployed on the
3207 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
3208 RES_BLAST defined in the <resolv.h> header file have been deprecated.
3209 They were already unimplemented.
3211 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
3212 _res.flags are deprecated. The flag was standardized in RFC 2133, but
3213 removed again from the IETF name lookup interface specification in RFC
3214 2553. Applications should use getaddrinfo instead.
3216 * DNSSEC-related declarations and definitions have been removed from the
3217 <arpa/nameser.h> header file, and libresolv will no longer attempt to
3218 decode the data part of DNSSEC record types. Previous versions of glibc
3219 only implemented minimal support for the previous version of DNSSEC, which
3220 is incompatible with the currently deployed version.
3222 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
3223 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
3224 <arpa/nameser.h> header file because the distinction between RR types and
3225 meta-RR types is not officially standardized, subject to revision, and
3226 thus not suitable for encoding in a macro.
3228 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
3229 and rhook members of the res_state type in <resolv.h> have been removed.
3230 The glibc stub resolver did not support these hooks, but the header file
3231 did not reflect that.
3233 * For multi-arch support it is recommended to use a GCC which has
3234 been built with support for GNU indirect functions. This ensures
3235 that correct debugging information is generated for functions
3236 selected by IFUNC resolvers. This support can either be enabled by
3237 configuring GCC with '--enable-gnu-indirect-function', or by
3238 enabling it by default by setting 'default_gnu_indirect_function'
3239 variable for a particular architecture in the GCC source file
3242 * GDB pretty printers have been added for mutex and condition variable
3243 structures in POSIX Threads. When installed and loaded in gdb these pretty
3244 printers show various pthread variables in human-readable form when read
3245 using the 'print' or 'display' commands in gdb.
3247 * Tunables feature added to allow tweaking of the runtime for an application
3248 program. This feature can be enabled with the '--enable-tunables' configure
3249 flag. The GNU C Library manual has details on usage and README.tunables has
3250 instructions on adding new tunables to the library.
3252 * A new version of condition variables functions have been implemented in
3253 the NPTL implementation of POSIX Threads to provide stronger ordering
3256 * A new version of pthread_rwlock functions have been implemented to use a more
3257 scalable algorithm primarily through not using a critical section anymore to
3260 Security related changes:
3262 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
3263 have been created with makecontext could fail to terminate due to a
3264 missing .cantunwind annotation. This has been observed to lead to a hang
3265 (denial of service) in some Go applications compiled with gccgo. Reported
3266 by Andreas Schwab. (CVE-2016-6323)
3268 * The DNS stub resolver functions would crash due to a NULL pointer
3269 dereference when processing a query with a valid DNS question type which
3270 was used internally in the implementation. The stub resolver now uses a
3271 question type which is outside the range of valid question type values.
3274 The following bugs are resolved with this release:
3276 [4099] stdio: Overly aggressive caching by stream i/o functions.
3277 [7065] build: Support building glibc with -fstack-protector or -fstack-
3279 [9842] localedata: en_CA: incorrect date format
3280 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
3281 before it started waiting
3282 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
3283 [15765] nptl: sem_open is wrongly a cancellation point
3284 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
3285 [16458] libc: endian.h and netinet/in.h byte order macros return values of
3287 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
3288 library linked with pthread
3289 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
3290 "FIXME: Ingo" issue)
3291 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
3292 [17252] libc: getrandom and getentropy syscall
3293 [17730] malloc: thread-local storage is sometimes improperly free()'d
3294 after being __libc_memalign()'d
3295 [18241] stdio: failed fseek on memstream does not set errno and can fail
3297 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
3299 [18463] nptl: pthread_cond_broadcast issue when surrounded by
3300 PTHREAD_PRIO_INHERIT mutex on ARM
3301 [18784] network: res_query and related function crash for special record
3302 type queries (CVE-2015-5180)
3303 [19380] math: strtod does not raise "inexact"
3304 [19387] string: Integer overflow in memchr
3305 [19390] string: Integer overflow in strncat
3306 [19398] build: linknamespace tests fail with massively parallel build
3307 [19402] nptl: Deadlock with robust shared mutex and asynchronous
3309 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
3310 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
3311 [19514] libc: [PATCH] Fix spelling errors in spelling
3312 "implement"/"implementation" in several places
3313 [19582] network: Deprecate RES_USE_INET6
3314 [19673] manual: clog10 docs appear to be erroneous
3315 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
3316 causes a segmentation fault
3317 [19826] libc: invalid pointer returned from __tls_get_addr with static
3319 [20016] network: resolv: Remove hooks support from the API
3320 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
3322 [20033] math: [x86_64] vectorized math function don't call the __finite
3324 [20116] nptl: use after free in pthread_create
3325 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
3326 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
3328 [20311] nptl: please install proc_service.h
3329 [20366] libc: Compilation errors in installed headers in strict-compliance
3331 [20370] malloc: malloc: Arena free list management is still racy
3332 (incorrect fix in bug 19243)
3333 [20386] libc: assert (X = 0) does not result in GCC warning
3334 [20432] malloc: malloc: Minimize interface required for interposition
3335 [20435] libc: Missing unwind info in __startcontext causes infinite loop
3336 in _Unwind_Backtrace (CVE-2016-6323)
3337 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
3338 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
3340 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
3341 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
3342 [20477] network: resolv: incorrect double-checked locking related to
3344 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
3346 [20495] math: x86_64 performance degradation due to AVX/SSE transition
3348 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
3349 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
3350 cause transition penalty
3351 [20517] math: sparcv9 missing fdiml compat symbol
3352 [20524] manual: strverscmp is inconsistent
3353 [20525] libc: <sys/quota.h> should be based on kernel headers
3354 [20539] math: GCC 7 -static -lm fails to link at -O3
3355 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
3357 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
3359 [20591] network: Remove obsolete DNSSEC support
3360 [20592] network: DNS resource record type classification macros in
3361 <arpa/nameser.h> are incorrect
3362 [20593] network: Update DNS RR type definitions
3363 [20611] network: getaddrinfo accepts invalid numeric scope IDs
3364 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
3366 [20629] network: libresolv: Remove support for bitstring labels
3368 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
3369 assertion: "maxidx >= 2"
3370 [20660] math: [arm] Use VSQRT
3371 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
3372 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
3373 [20689] libc: Test for FMA should also check for AVX.
3374 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
3375 [20715] math: iszero macro breaks existing code
3376 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
3377 [20728] libc: powerpc: Missing TOC stub in clone
3378 [20729] build: glibc-2.24 fails to build for i486 with -Os
3379 [20750] build: Build fails with default PIE enabled gcc-6.x
3380 [20768] math: [alpha] sqrt fegetenv namespace
3381 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
3383 [20787] math: float_t is defined as float incorrectly on x86_64 even if
3384 __FLT_EVAL_METHOD__ is 2
3385 [20790] network: rpcgen buffer overrun in get_prog_declaration
3386 [20822] nptl: race condition in __lll_unlock_elision on powerpc
3387 [20829] libc: crypt snprintf namespace
3388 [20847] libc: tst-vfork3 failure
3389 [20855] math: Default bits/mathdef.h has inappropriate float_t
3390 [20859] math: [sh4] FP_ILOGB0 invalid
3391 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
3392 U+20AC), not same as GBK
3393 [20915] dynamic-link: global-dynamic TLS broken on aarch64
3394 [20916] math: pow handling of sNaN arguments
3395 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
3396 [20919] math: Bad pow (qNaN, 0) result with -lieee
3397 [20940] math: hypot sNaN handling
3398 [20947] math: fmax, fmin sNaN handling
3399 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
3400 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
3402 [20971] string: powerpc64/power7 memchr overflows internal pointer check
3403 [20973] nptl: robust mutexes: Lost wake-ups
3404 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
3405 [20978] nis: strlen on null pointer in nss_nisplus
3406 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
3408 [21014] string: i686 memchr overflows internal pointer check
3409 [21019] libc: [mips] n32 lseek incorrect on overflow
3410 [21022] libc: [microblaze] __backtrace get_frame_size namespace
3411 [21026] libc: [MIPS] readahead syscall is broken on n64
3412 [21028] math: Fallback fesetexceptflag should always succeed
3413 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
3414 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
3416 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
3417 [21061] librt: [microblaze] librt lost clock_* exports
3418 [21073] libc: tunables: insecure environment variables passed to
3419 subprocesses with AT_SECURE
3420 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
3424 * The minimum Linux kernel version that this version of the GNU C Library
3425 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
3426 kernel version 2.6.32 or later suffices (on architectures that already
3427 required kernel versions more recent than 3.2, those requirements remain
3428 unchanged). Linux 3.2 or later kernel headers are required on all
3431 * The pap_AN locale has been deleted. This has been deprecated for a long
3432 time. It has been replaced by pap_AW & pap_CW, both of which have long
3433 been included in previous releases.
3435 * The readdir_r and readdir64_r functions have been deprecated. It is
3436 recommended to use readdir and readdir64 instead.
3438 * The type “union wait” has been removed. It was deprecated in the early
3439 1990s and never part of POSIX. Application code should use the int type
3440 instead of “union wait”.
3442 * A new NSS action is added to facilitate large distributed system
3443 administration. The action, MERGE, allows remote user stores like LDAP
3444 to be merged into local user stores like /etc/groups in order to provide
3445 easy to use, updated, and managed sets of merged credentials. The new
3446 action can be used by configuring it in /etc/nsswitch.conf:
3447 group: files [SUCCESS=merge] nis
3448 Implemented by Stephen Gallagher (Red Hat).
3450 * The deprecated __malloc_initialize_hook variable has been removed from the
3453 * The long unused localedef --old-style option has been removed. It hasn't
3454 done anything in over 16 years. Scripts using this option can safely
3457 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
3458 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
3459 return the next representable value in the direction of positive infinity
3460 and the nextdown functions return the next representable value in the
3461 direction of negative infinity. These are currently enabled as GNU
3464 Security related changes:
3466 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
3467 could result in a stack overflow when getnetbyname was called with an
3468 overly long name. (CVE-2016-3075)
3470 * Previously, getaddrinfo copied large amounts of address data to the stack,
3471 even after the fix for CVE-2013-4458 has been applied, potentially
3472 resulting in a stack overflow. getaddrinfo now uses a heap allocation
3473 instead. Reported by Michael Petlan. (CVE-2016-3706)
3475 * The glob function suffered from a stack-based buffer overflow when it was
3476 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
3477 Reported by Alexander Cherepanov. (CVE-2016-1234)
3479 * The Sun RPC UDP client could exhaust all available stack space when
3480 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
3481 alloca plugin for GCC. (CVE-2016-4429)
3483 * The IPv6 name server management code in libresolv could result in a memory
3484 leak for each thread which is created, performs a failing naming lookup,
3485 and exits. Over time, this could result in a denial of service due to
3486 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
3488 The following bugs are resolved with this release:
3490 [1170] localedata: ne_NP: update Nepali locale definition file
3491 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
3493 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
3494 [6796] math: fdim() does not set errno on overflow
3495 [10354] libc: posix_spawn should use vfork() in more cases than presently
3496 [11213] localedata: localedata: add copyright disclaimer to locale files
3497 [12143] localedata: chr_US: new Cherokee locale
3498 [12450] localedata: sgs_LT: new locale
3499 [12676] localedata: ln_CD: new locale
3500 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
3502 [13304] math: fma, fmaf, fmal produce wrong results
3503 [14259] build: --localedir arg to configure is ignored
3504 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
3505 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
3506 [14934] localedata: es_CL: wrong first weekday chilean locale
3507 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
3509 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
3511 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
3512 [15368] nptl: raise() is not async-signal-safe
3513 [15479] math: ceil, floor, round and trunc raise inexact exception
3514 [15578] localedata: kk_KZ: various updates
3515 [16003] localedata: pap_AN: punt old locale
3516 [16137] localedata: iw_IL: punt old locale
3517 [16190] localedata: eo: new esperanto locale
3518 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
3519 [16742] malloc: race condition: pthread_atfork() called before first
3520 malloc() results in unexpected locking behaviour/deadlocks
3521 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
3523 [16983] localedata: postal_fmt does not allow %l and %n modifiers
3524 [17565] localedata: pt_PT: wrong (work-)week start
3525 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
3526 [17950] build: Build fails with -msse
3527 [18205] localedata: be_BY*: wrong first_weekday and first_workday
3528 [18433] libc: posix_spawn does not return correctly upon failure to
3530 [18453] localedata: charmaps/IBM875: incorrect codes
3531 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
3533 [18896] localedata: he_IL: improvements for currency
3534 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
3535 Romanian locale data
3536 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
3538 [19056] libc: Deprecate readdir_r
3539 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
3541 [19198] localedata: nl_NL: small improvements for Dutch locales
3542 [19257] network: Per-thread memory leak in __res_vinit with IPv6
3543 nameservers (CVE-2016-5417)
3544 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
3546 [19400] locale: Language missing in "iso-639.def", trivial fix in
3548 [19431] malloc: Deadlock between fflush, getdelim, and fork
3549 [19505] libc: Incorrect file descriptor validity checks in
3550 posix_spawn_file_actions_add{open,close,dup2}
3551 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
3552 when using RTLD_NEXT
3553 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
3554 `intl/{gettextP,loadinfo}.h'
3555 [19534] libc: execle, execlp may use malloc
3556 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
3557 [19573] network: res_nclose and __res_maybe_init disagree about name
3558 server initialization, breaking Hesiod
3559 [19575] localedata: Status of GB18030 tables
3560 [19581] localedata: sr_* date_fmt string contains additional newline
3561 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
3563 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
3564 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
3565 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
3566 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
3568 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
3570 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
3572 [19610] dynamic-link: ldconfig -X removes stale symbolic links
3573 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
3574 [19633] locale: strfmon_l applies global locale to number formatting
3575 [19642] network: Memory leak in getnameinfo
3576 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
3577 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
3579 [19654] math: [x86_64] Need testcase for BZ #19590 fix
3580 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
3582 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
3583 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
3585 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
3587 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
3589 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
3590 pointers and lengths in error-case.
3591 [19727] locale: Converting from/to UTF-xx with iconv() does not always
3592 report errors on UTF-16 surrogates values.
3593 [19755] nscd: nscd assertion failure in gc
3594 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
3595 [19759] libc: mempcpy shouldn't be inlined
3596 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
3597 [19765] libc: s390 needs an optimized mempcpy
3598 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
3599 NAME_MAX limit assumption (CVE-2016-1234)
3600 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
3601 [19787] network: Missing and incorrect truncation checks in getnameinfo
3602 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
3604 [19791] network: Assertion failure in res_query.c with un-connectable name
3606 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
3607 [19822] math: libm.so install clobbers old version
3608 [19825] network: resolv: send_vc can return uninitialized data in second
3609 response to getaddrinfo
3610 [19830] network: nss_dns: should check RDATA length against buffer length
3611 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
3612 confronted with A/AAAA records of invalid size
3613 [19837] nss: nss_db: No retries for some long lines with a larger buffer
3614 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
3615 [19853] stdio: Printing IBM long double in decimal with high precision is
3617 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
3618 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
3619 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
3621 [19865] network: Assertion failure or memory leak in
3622 _nss_dns_getcanonname_r
3623 [19868] network: nss_dns: netent code does not skip over non-PTR records
3624 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
3626 [19881] string: Improve x86-64 memset
3627 [19907] string: Incorrect memcpy tests
3628 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
3630 [19925] libc: termios.h XCASE namespace
3631 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
3632 [19929] libc: limits.h NL_NMAX namespace
3633 [19931] stdio: Memory leak in vfprintf
3634 [19957] libc: clone(CLONE_VM) access invalid parent memory
3635 [19963] localedata: en_IL: New locale
3636 [19989] stdio: stdio.h cuserid namespace
3637 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
3639 [19996] locale: langinfo.h nl_langinfo_l namespace
3640 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
3641 [20010] network: getaddrinfo: Stack overflow in hostent translation
3643 [20012] stdio: libio: fmemopen append mode failure
3644 [20014] stdio: stdio.h namespace for pre-threads POSIX
3645 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
3646 [20023] libc: fcntl.h timespec namespace
3647 [20024] math: [x86_64] vectorized sincos trashes the stack
3648 [20031] network: nss_hesiod: Heap overflow in get_txt_records
3649 [20041] time: sys/time.h timespec namespace
3650 [20043] libc: unistd.h missing cuserid for UNIX98 and before
3651 [20044] libc: unistd.h missing pthread_atfork for UNIX98
3652 [20051] libc: ttyslot in wrong header under wrong conditions
3653 [20054] libc: gethostname not declared for XPG4
3654 [20055] libc: termios.h missing tcgetsid for XPG4
3655 [20072] dynamic-link: x86 init_cpu_features is called twice in static
3657 [20073] libc: sys/stat.h fchmod namespace
3658 [20074] libc: stdlib.h rand_r namespace
3659 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
3660 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
3662 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
3663 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
3665 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
3666 [20119] libc: Wrong mask for processors level type from CPUID
3667 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
3668 AS not supporting AVX512
3669 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
3671 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
3672 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
3674 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
3675 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
3676 [20178] libc: posix_spawn{p} should not call exit
3677 [20191] stdio: libio: vtables hardening
3678 [20195] string: FMA4 detection requires CPUID execution with register
3680 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
3681 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
3683 [20212] math: acos (sNaN) returns sNaN
3684 [20213] math: asin (sNaN) returns sNaN
3685 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
3686 [20218] math: [i386] asinhl (sNaN) returns sNaN
3687 [20219] math: [i386] atanhl (sNaN) returns sNaN
3688 [20222] stdio: fopencookie: Mangle function pointers
3689 [20224] math: [i386] cbrtl (sNaN) returns sNaN
3690 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
3691 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
3693 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
3694 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
3695 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
3696 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
3697 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
3698 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
3699 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
3700 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
3701 [20240] math: modf (sNaN) returns sNaN
3702 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
3703 [20250] math: frexp (sNaN) returns sNaN
3704 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
3705 [20255] math: [i386] fdim, fdimf return with excess range and precision /
3707 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
3708 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
3709 subscript is below array bounds [-Werror=array-bounds]
3710 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
3711 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
3713 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
3714 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
3716 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
3717 "invalid" exceptions
3718 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
3719 [20316] localedata: id_ID: Februari instead of Pebruari
3720 [20327] string: POWER8 strcasecmp returns incorrect result
3721 [20347] math: Failure: Test: j0_downward (0xap+0)
3722 [20348] libc: FAIL: misc/tst-preadvwritev64
3723 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
3724 [20350] libc: There is no test for p{read,write}64
3725 [20357] math: Incorrect cos result for 1.5174239687223976
3726 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
3730 * Unicode 8.0.0 Support: Character encoding, character type info, and
3731 transliteration tables are all updated to Unicode 8.0.0, using new
3732 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
3733 These updates cause user visible changes, such as the fixes for bugs
3734 89, 16061, and 18568.
3736 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
3737 kernel-internal CPU set size. This means that requests that change the
3738 CPU affinity which failed before (for example, an all-ones CPU mask) will
3739 now succeed. Applications that need to determine the effective CPU
3740 affinities need to call sched_getaffinity or pthread_getaffinity_np after
3741 setting it because the kernel can adjust it (and the previous size check
3742 would not detect this in the majority of cases).
3744 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
3745 the following new symbols are used: fts64_children, fts64_close,
3746 fts64_open, fts64_read and fts64_set.
3748 * getaddrinfo now detects certain invalid responses on an internal netlink
3749 socket. If such responses are received, an affected process will
3750 terminate with an error message of "Unexpected error <number> on netlink
3751 descriptor <number>" or "Unexpected netlink response of size <number> on
3752 descriptor <number>". The most likely cause for these errors is a
3753 multi-threaded application which erroneously closes and reuses the netlink
3754 file descriptor while it is used by getaddrinfo.
3756 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
3757 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
3758 unnecessary serialization of memory allocation requests across threads.
3759 The defect is now corrected. Users should see a substantial increase in
3760 the concurent throughput of allocation requests for applications which
3761 trigger this bug. Affected applications typically create and
3762 destroy threads frequently. (Bug 19048 was reported and analyzed by
3765 * There is now a --disable-timezone-tools configure option for disabling the
3766 building and installing of the timezone related utilities (zic, zdump, and
3767 tzselect). This is useful for people who build the timezone data and code
3768 independent of the GNU C Library.
3770 * The obsolete header <regexp.h> has been removed. Programs that require
3771 this header must be updated to use <regex.h> instead.
3773 * The obsolete functions bdflush, create_module, get_kernel_syms,
3774 query_module and uselib are no longer available to newly linked binaries;
3775 the header <sys/kdaemon.h> has been removed. These functions and header
3776 were specific to systems using the Linux kernel and could not usefully be
3777 used with the GNU C Library on systems with version 2.6 or later of the
3780 * Optimized string, wcsmbs and memory functions for IBM z13.
3781 Implemented by Stefan Liebler.
3783 * Newly linked programs that define a variable called signgam will no longer
3784 have it set by the lgamma, lgammaf and lgammal functions. Programs that
3785 require signgam to be set by those functions must ensure that they use the
3786 variable provided by the GNU C Library and declared in <math.h>, without
3787 defining their own copy.
3789 * The minimum GCC version that can be used to build this version of the GNU
3790 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
3791 still be used to compile programs using the GNU C Library.
3793 Security related changes:
3795 * An out-of-bounds value in a broken-out struct tm argument to strftime no
3796 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
3798 * The LD_POINTER_GUARD environment variable can no longer be used to disable
3799 the pointer guard feature. It is always enabled. Previously,
3800 LD_POINTER_GUARD could be used to disable security hardening in binaries
3801 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
3804 * An integer overflow in hcreate and hcreate_r could lead to an
3805 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
3807 * The catopen function no longer has unbounded stack usage. Reported by
3808 Max. (CVE-2015-8779)
3810 * The nan, nanf and nanl functions no longer have unbounded stack usage
3811 depending on the length of the string passed as an argument to the
3812 functions. Reported by Joseph Myers. (CVE-2014-9761)
3814 * A stack-based buffer overflow was found in libresolv when invoked from
3815 libnss_dns, allowing specially crafted DNS responses to seize control
3816 of execution flow in the DNS client. The buffer overflow occurs in
3817 the functions send_dg (send datagram) and send_vc (send TCP) for the
3818 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
3819 family. The use of AF_UNSPEC triggers the low-level resolver code to
3820 send out two parallel queries for A and AAAA. A mismanagement of the
3821 buffers used for those queries could result in the response of a query
3822 writing beyond the alloca allocated buffer created by
3823 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
3824 the overflow. Thanks to the Google Security Team and Red Hat for
3825 reporting the security impact of this issue, and Robert Holiday of
3826 Ciena for reporting the related bug 18665. (CVE-2015-7547)
3828 The following bugs are resolved with this release:
3830 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
3831 [887] math: Math library function "logb" and "nextafter" inconsistent
3832 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
3833 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
3834 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
3835 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
3837 [4404] localedata: German translation of "Alarm clock" is misleading
3838 [6799] math: nextafter() and nexttoward() doen't set errno on
3839 overflow/underflow errors
3840 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3842 [10432] nis: _nss_nis_setnetgrent assertion failure
3843 [11460] libc: fts has no LFS support
3844 [12926] network: getaddrinfo()/make_request() may spin forever
3845 [13065] nptl: Race condition in pthread barriers
3846 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3847 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3849 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3850 [14912] libc: Rename non-installed bits/*.h headers
3851 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3852 [15367] math: Let gcc use __builtin_isinf
3853 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3854 [15421] math: lgamma wrongly sets signgam for ISO C
3855 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3856 FE_INVALID with argument out of range
3857 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3859 [15786] dynamic-link: ifunc resolver functions can smash function
3861 [15918] math: Unnecessary check for equality in hypotf()
3862 [16061] localedata: Review / update transliteration data
3863 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3865 [16141] time: strptime %z offset restriction
3866 [16171] math: drem should be alias of remainder
3867 [16296] math: fegetround is pure?
3868 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3869 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3871 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3872 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3874 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3875 "Exception "Inexact" set" on ppc32
3876 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3877 [16517] math: Missing underflow exception from tanf/tan/tanl
3878 [16519] math: Missing underflow exception from sinhf
3879 [16520] math: Missing underflow exception from tanhf
3880 [16521] math: Missing underflow exception from exp2
3881 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3883 [16734] stdio: fopen calls mmap to allocate its buffer
3884 [16961] math: nan function incorrect handling of bad sequences
3885 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3886 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3887 [16985] locale: localedef: confusing error message when opening output
3889 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3890 [17197] locale: Redundant shift character in iconv conversion output at
3892 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3893 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3894 [17250] dynamic-link: static linking breaks nss loading
3895 (getaddrinfo/getpwnam/etc...)
3896 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3898 [17441] math: isnan() should use __builtin_isnan() in GCC
3899 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3900 (related to lock elision)
3901 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3902 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3903 [17887] time: strptime should be able to parse "+01:00" style timezones
3904 [17905] libc: catopen() Multiple unbounded stack allocations
3906 [18084] libc: backtrace (..., 0) dumps core on x86
3907 [18086] libc: nice() sets errno to 0 on success
3908 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3909 is too large (CVE-2015-8778)
3910 [18251] dynamic-link: SONAME missing when audit modules provides path
3911 [18265] libc: add attributes for wchar string and memory functions
3912 [18370] math: csqrt missing underflows
3913 [18421] libc: [hppa] read-only segment has dynamic relocations
3914 [18472] libc: Obsolete syscall wrappers should be compat symbols
3915 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3916 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3917 [18525] localedata: Remove locale timezone information
3918 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3919 [18568] localedata: Update locale data to Unicode 8.0
3920 [18589] locale: sort-test.sh fails at random
3921 [18595] math: ctan, ctanh missing underflows
3922 [18604] libc: assert macro-expands its argument
3923 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3924 contains a vector instruction exception.
3925 [18611] math: j1, jn missing errno setting on underflow
3926 [18618] localedata: sync Chechen locale definitions with other *_RU
3928 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3929 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3930 [18665] network: In send_dg, the recvfrom function is NOT always using the
3931 buffer size of a newly created buffer (CVE-2015-7547)
3932 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3934 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3936 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3937 [18699] math: tilegx cproj() for various complex infinities does not yield
3939 [18724] libc: Harden put*ent functions against data injection
3940 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3941 [18755] build: build errors with -DNDEBUG
3942 [18757] stdio: fmemopen fails to set errno on failure
3943 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3945 [18781] libc: openat64 lacks O_LARGEFILE
3946 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3947 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3948 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3949 [18790] math: [ldbl-128ibm] tanhl inaccurate
3950 [18795] libc: stpncpy fortification misses buffer lengths that are
3951 statically too large
3952 [18796] build: build fails for --disable-mathvec
3953 [18803] math: hypot missing underflows
3954 [18820] stdio: fmemopen may leak memory on failure
3955 [18823] math: csqrt spurious underflows
3956 [18824] math: fma spurious underflows
3957 [18825] math: pow missing underflows
3958 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3959 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3960 [18870] build: sem_open.c fails to compile with missing symbol
3962 [18872] stdio: Fix memory leak in printf_positional
3963 [18873] libc: posix_fallocate overflow check ineffective
3964 [18875] math: Excess precision leads incorrect libm
3965 [18877] libc: arm: mmap offset regression
3966 [18887] libc: memory corruption when using getmntent on blank lines
3967 [18918] localedata: hu_HU: change time to HH:MM:SS format
3968 [18921] libc: Regression: extraneous stat() and fstat() performed by
3970 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3971 binaries (CVE-2015-8777)
3972 [18951] math: tgamma missing underflows
3973 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3975 [18953] localedata: lt_LT: change currency symbol to the euro
3976 [18956] math: powf inaccuracy
3977 [18961] math: [i386] exp missing underflows
3978 [18966] math: [i386] exp10 missing underflows
3979 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3980 [18969] build: multiple string test failures due to missing locale
3982 [18970] libc: Reference of pthread_setcancelstate in libc.a
3983 [18977] math: float / long double Bessel functions not in XSI POSIX
3984 [18980] math: i386 libm functions return with excess range and precision
3985 [18981] math: i386 scalb*, ldexp return with excess range and precision
3986 [18982] stdio: va_list and vprintf
3987 [18985] time: Passing out of range data to strftime() causes a segfault
3989 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3990 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3991 [19012] locale: iconv_open leaks memory on error path
3992 [19016] math: clog, clog10 inaccuracy
3993 [19018] nptl: Mangle function pointers in tls_dtor_list
3994 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3995 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3996 [19048] malloc: malloc: arena free list can become cyclic, increasing
3998 [19049] math: [powerpc] erfc incorrect zero sign
3999 [19050] math: [powerpc] log* incorrect zero sign
4000 [19058] math: [x86_64] Link fail with -fopenmp and -flto
4001 [19059] math: nexttoward overflow incorrect in non-default rounding modes
4002 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
4003 [19074] network: Data race in _res_hconf_reorder_addrs
4004 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
4005 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
4006 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
4008 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
4010 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
4011 [19086] manual: posix_fallocate64 documented argument order is wrong.
4012 [19088] math: lround, llround missing exceptions close to overflow
4014 [19094] math: lrint, llrint missing exceptions close to overflow threshold
4015 [19095] math: dbl-64 lrint incorrect for 64-bit long
4016 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
4017 [19124] dynamic-link: ld.so failed to build with older assmebler
4018 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
4019 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
4020 [19134] math: [powerpc32] lround, lroundf spurious exceptions
4021 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
4022 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
4023 pthread_setaffinity_np
4024 [19156] math: [ldbl-128] j0l spurious underflows
4025 [19164] nptl: tst-getcpu fails with many possible CPUs
4026 [19168] math: math/test-ildoubl and math/test-ldouble failure
4027 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
4028 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
4030 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
4031 (FE_NOMASK_ENV) do not clear SSE exceptions
4032 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
4033 _int_new_arena/reused_arena
4034 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
4035 [19201] math: dbl-64 remainder incorrect sign of zero result
4036 [19205] math: bits/math-finite.h conditions do not match math.h and
4038 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
4039 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
4040 for C99-based standards
4041 [19212] libc: features.h not -Wundef clean
4042 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
4044 [19214] libc: Family and model identification for AMD CPU's are incorrect.
4045 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
4046 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
4048 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
4049 "inexact" exceptions
4050 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
4052 [19242] libc: strtol incorrect in Turkish locales
4053 [19243] malloc: reused_arena can pick an arena on the free list, leading
4054 to an assertion failure and reference count corruption
4055 [19253] time: tzset() ineffective when temporary TZ did not include DST
4057 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
4058 [19270] math: [hppa] Shared libm missing __isnanl
4059 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
4060 MAP_HUGETLB and MAP_STACK defines
4061 [19313] nptl: Wrong __cpu_mask for x32
4062 [19347] libc: grantpt: try to force a specific gid even without pt_chown
4063 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
4064 [19350] math: [ldbl-128ibm] sinhl spurious overflows
4065 [19351] math: [ldbl-128ibm] logl inaccurate near 1
4066 [19363] time: x32: times() return value wrongly truncates/sign extends
4068 [19367] dynamic-link: Improve branch prediction on Silvermont
4069 [19369] network: Default domain name not reset by res_ninit when "search"
4070 / "domain" entry is removed from resolv.conf
4071 [19375] math: powerpc: incorrect results for POWER7 logb with negative
4073 [19385] localedata: bg_BG: time separator should be colon, not comma
4074 [19408] libc: linux personality syscall wrapper may erroneously return an
4075 error on 32-bit architectures
4076 [19415] libc: dladdr returns wrong names on hppa
4077 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
4078 IBM905, IBM907, and IBM909
4079 [19439] math: Unix98 isinf and isnan functions conflict with C++11
4080 [19443] build: build failures with -DDEBUG
4081 [19451] build: Make check fails on test-double-vlen2
4082 [19462] libc: Glibc failed to build with -Os
4083 [19465] math: Wrong code with -Os
4084 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
4086 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
4088 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
4089 [19486] math: S390: Math tests fail with "Exception Inexact set".
4090 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
4091 [19550] libc: [mips] mmap negative offset handling inconsistent with other
4093 [19590] math: Fail to build shared objects that use libmvec.so functions.
4097 * The following bugs are resolved with this release:
4099 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
4100 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
4101 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
4102 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
4103 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
4104 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
4105 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
4106 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
4107 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
4108 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
4109 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
4110 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
4111 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
4112 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
4113 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
4114 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
4115 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
4116 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
4117 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
4118 18657, 18676, 18694, 18696, 18887.
4120 * Cache information can be queried via sysconf() function on s390 e.g. with
4121 _SC_LEVEL1_ICACHE_SIZE as argument.
4123 * A buffer overflow in gethostbyname_r and related functions performing DNS
4124 requests has been fixed. If the NSS functions were called with a
4125 misaligned buffer, the buffer length change due to pointer alignment was
4126 not taken into account. This could result in application crashes or,
4127 potentially arbitrary code execution, using crafted, but syntactically
4128 valid DNS responses. (CVE-2015-1781)
4130 * The time zone file parser has been made more robust against crafted time
4131 zone files, avoiding heap buffer overflows related to the processing of
4132 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
4133 large time zone data files. Overly long time zone specifiers in the TZ
4134 variable no longer result in stack overflows and crashes.
4136 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
4137 for LD and GD on x86 and x86-64, has been implemented. You will need
4138 binutils-2.24 or later to enable this optimization.
4140 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
4141 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
4142 Hat). These updates cause user visible changes, such as the fix for bug
4145 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
4146 and getXXbyYY NSS calls for the same database, causing a denial-of-service
4147 condition in some applications.
4149 * Added vector math library named libmvec with the following vectorized x86_64
4150 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
4152 The library can be disabled with --disable-mathvec. Use of the functions is
4153 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
4154 Shared library libmvec.so is linked in as needed when using -lm (no need to
4155 specify -lmvec explicitly for not static builds).
4156 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
4158 * A new fmemopen implementation has been added with the goal of POSIX
4159 compliance. The new implementation fixes the following long-standing
4160 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
4161 old implementation is still present for use be by existing binaries.
4163 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
4164 releases. It has been fixed to match 2.19 and older, but binaries built
4165 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
4167 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
4168 Contributed by Roland McGrath (Google).
4170 * The header <regexp.h> is deprecated, and will be removed in a future
4171 release. Use of this header will trigger a deprecation warning.
4172 Application developers should update their code to use <regex.h> instead.
4174 This header was formerly part of SUS, but was deprecated in 1994 and
4175 removed from the standard in 2001. Also, the glibc implementation
4176 leaks memory. See BZ#18681 for more details.
4180 * The following bugs are resolved with this release:
4182 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
4183 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
4184 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
4185 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
4186 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
4187 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
4188 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
4189 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
4190 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
4191 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
4194 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
4195 too little memory for the to-be-scanned arguments and overflow the
4196 allocated buffer. The implementation now correctly computes the required
4197 buffer size when using malloc, and switches to malloc from alloca as
4200 * A new semaphore algorithm has been implemented in generic C code for all
4201 machines. Previous custom assembly implementations of semaphore were
4202 difficult to reason about or ensure that they were safe. The new version
4203 of semaphore supports machines with 64-bit or 32-bit atomic operations.
4204 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
4205 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
4207 * Port to Altera Nios II has been contributed by Mentor Graphics.
4209 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
4210 implementations for powerpc64/powerpc64le.
4211 Implemented by Adhemerval Zanella (IBM).
4213 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
4214 and powerpc64le. This may improve lock scaling of existing programs on
4215 HTM capable systems. The lock elision code is only enabled with
4216 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
4217 powerpc will issue a transaction abort on every syscall to avoid side
4218 effects being visible outside transactions.
4220 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
4221 AArch64. Contributed by ARM Ltd.
4223 * i386 memcpy functions optimized with SSE2 unaligned load/store.
4225 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
4226 under certain input conditions resulting in the execution of a shell for
4227 command substitution when the application did not request it. The
4228 implementation now checks WRDE_NOCMD immediately before executing the
4229 shell and returns the error WRDE_CMDSUB as expected.
4231 * CVE-2012-3406 printf-style functions could run into a stack overflow when
4232 processing format strings with a large number of format specifiers.
4234 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
4235 infinite loop if the DNS response contained a PTR record of an unexpected
4238 * The minimum GCC version that can be used to build this version of the GNU
4239 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
4240 still be used to compile programs using the GNU C Library.
4242 * The GNU C Library is now built with -Werror by default. This can be
4243 disabled by configuring with --disable-werror.
4245 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
4247 * The obsolete sigvec function has been removed. This was the original
4248 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
4249 programs have been using instead for about 25 years. Of course, ABI
4250 compatibility for old binaries using sigvec remains intact.
4252 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
4253 with newer versions of bison.
4255 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
4256 The original MIPS o32 hard-float ABI requires an FPU where double-precision
4257 registers overlay two consecutive single-precision registers. MIPS32R2
4258 introduced a new FPU mode (FR=1) where double-precision registers extend the
4259 corresponding single-precision registers which is incompatible with the
4260 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
4261 require the use of FR=1 making a transition necessary. New o32 ABI
4262 extensions enable users to migrate over time from the original o32 ABI
4263 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
4264 tracks the ABI of any loaded object and verifies that new objects are
4265 compatible. Mode transitions will also be requested as required and
4266 unsupportable objects will be rejected. The ABI checks include both soft and
4267 hard float ABIs for o32, n32 and n64.
4269 GCC 5 with GNU binutils 2.25 onwards:
4270 It is strongly recommended that all o32 system libraries are built using the
4271 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
4272 with the original and all new o32 ABI extensions. Configure a MIPS GCC
4273 compiler using --with-fp-32=xx to set this by default.
4277 * The following bugs are resolved with this release:
4279 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
4280 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
4281 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
4282 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
4283 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
4284 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
4285 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
4286 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
4287 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
4288 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
4289 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
4290 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
4291 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
4292 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
4293 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
4295 * Reverted change of ABI data structures for s390 and s390x:
4296 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
4297 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
4298 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
4299 are preserved pointing straight to the same implementation as the old ones.
4300 Given that, new callers will simply provide a too-big buffer to these
4301 functions. Any applications/libraries out there that embed jmp_buf or
4302 ucontext_t in an ABI-relevant data structure that have already been rebuilt
4303 against 2.19 headers will have to rebuilt again. This is necessary in any
4304 case to revert the breakage in their ABI caused by the glibc change.
4306 * Support for file description locks is added to systems running the
4307 Linux kernel. The standard file locking interfaces are extended to
4308 operate on file descriptions, not file descriptors, via the use of
4309 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
4310 are associated with an open file instead of a process.
4312 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
4314 * The minimum Linux kernel version that this version of the GNU C Library
4315 can be used with is 2.6.32.
4317 * Running the testsuite no longer terminates as soon as a test fails.
4318 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
4319 with PASS or FAIL lines for individual tests. A summary of the results is
4320 printed, including a list of failing lists, and "make check" exits with
4321 error status if there were any unexpected failures. "make check
4322 stop-on-test-failure=y" may be used to keep the old behavior.
4324 * The am33 port, which had not worked for several years, has been removed
4327 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
4328 supported; they now act the same as _DEFAULT_SOURCE (but generate a
4329 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
4330 conflicted with POSIX (support for which was removed in 2.19), the
4331 interfaces those macros enabled remain available when compiling with
4332 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
4333 test macros defined.
4335 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
4337 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
4338 This may improve lock scaling of existing programs on TX capable systems.
4339 The lock elision code is only built with --enable-lock-elision=yes and
4340 then requires a GCC version supporting the TX builtins. With lock elision
4341 default mutexes are elided via __builtin_tbegin, if the cpu supports
4342 transactions. By default lock elision is not enabled and the elision code
4345 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
4346 copy the path argument. This allowed programs to cause posix_spawn to
4347 deference a dangling pointer, or use an unexpected pathname argument if
4348 the string was modified after the posix_spawn_file_actions_addopen
4351 * All supported architectures now use the main glibc sysdeps directory
4352 instead of some being in a separate "ports" directory (which was
4353 distributed separately before glibc 2.17).
4355 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
4356 On configurations that support it (all Linux configurations), it's now
4357 used regardless of the --enable-add-ons switch to configure. It is no
4358 longer possible to build such configurations without pthreads support.
4360 * Locale names, including those obtained from environment variables (LANG
4361 and the LC_* variables), are more tightly checked for proper syntax.
4362 setlocale will now fail (with EINVAL) for locale names that are overly
4363 long, contain slashes without starting with a slash, or contain ".." path
4364 components. (CVE-2014-0475) Previously, some valid locale names were
4365 silently replaced with the "C" locale when running in AT_SECURE mode
4366 (e.g., in a SUID program). This is no longer necessary because of the
4369 * On x86-64, the dynamic linker's lazy-binding support is now compatible
4370 with application code using Intel MPX instructions. (With all previous
4371 versions, the MPX register state could be clobbered when making calls
4372 into or out of a shared library.) Note that while the new dynamic
4373 linker is compatible with all known x86 hardware whether or not it
4374 supports Intel MPX, some x86 instruction-set emulators might fail to
4375 handle the new instruction encodings. This is known to affect Valgrind
4376 versions up through 3.9 (but will be fixed in the forthcoming 3.10
4377 release), and might affect other tools that do instruction emulation.
4379 * Support for loadable gconv transliteration modules has been removed.
4380 The support for transliteration modules has been non-functional for
4381 over a decade, and the removal is prompted by security defects. The
4382 normal gconv conversion modules are still supported. Transliteration
4383 with //TRANSLIT is still possible, and the //IGNORE specifier
4384 continues to be supported. (CVE-2014-5119)
4386 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
4387 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
4388 resulting a denial-of-service security vulnerability in applications which
4389 use functions related to iconv. (CVE-2014-6040)
4393 * The following bugs are resolved with this release:
4395 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
4396 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
4397 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
4398 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
4399 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
4400 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
4401 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
4402 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
4403 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
4404 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
4405 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
4406 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
4407 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
4408 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
4409 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
4410 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
4411 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
4412 16431, 16453, 16474, 16506, 16510, 16529
4414 * Slovenian translations for glibc messages have been contributed by the
4415 Translation Project's Slovenian team of translators.
4417 * The public headers no longer use __unused nor __block. This change is to
4418 support compiling programs that are derived from BSD sources and use
4419 __unused internally, and to support compiling with Clang's -fblock
4420 extension which uses __block.
4422 * CVE-2012-4412 The strcoll implementation caches indices and rules for
4423 large collation sequences to optimize multiple passes. This cache
4424 computation may overflow for large collation sequences and may cause a
4425 stack or buffer overflow. This is now fixed to use a slower algorithm
4426 which does not use a cache if there is an integer overflow.
4428 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
4429 rules for large collation sequences to optimize multiple passes and falls
4430 back to alloca if malloc fails, resulting in a possible stack overflow.
4431 The implementation now falls back to an uncached collation sequence lookup
4434 * CVE-2013-4788 The pointer guard used for pointer mangling was not
4435 initialized for static applications resulting in the security feature
4436 being disabled. The pointer guard is now correctly initialized to a
4437 random value for static applications. Existing static applications need
4438 to be recompiled to take advantage of the fix (bug 15754).
4440 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
4441 to the d_name member of struct dirent, or omit the terminating NUL
4442 character. (Bugzilla #14699).
4444 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
4445 aligned_alloc functions could allocate too few bytes or corrupt the
4446 heap when passed very large allocation size values (Bugzilla #15855,
4449 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
4450 for AF_INET6 has been fixed (Bugzilla #16072).
4452 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
4453 pap_CW, quz_PE, the_NP.
4455 * Substantially revised locales: gd_GB, ht_HT
4457 * The LC_ADDRESS field was updated to support country_car for almost all
4460 * ISO 1427 definitions were updated.
4462 * ISO 3166 definitions were updated.
4464 * The localedef utility now supports --big-endian and --little-endian
4465 command-line options to generate locales for a different system from that
4466 for which the C library was built.
4468 * Binary locale files now only depend on the endianness of the system for
4469 which they are generated and not on other properties of that system. As a
4470 consequence, binary files generated with new localedef may be incompatible
4471 with old versions of the GNU C Library, and binary files generated with
4472 old localedef may be incompatible with this version of the GNU C Library,
4473 in the following circumstances:
4475 + Locale files may be incompatible on m68k systems.
4477 + Locale archive files (but not separate files for individual locales) may
4478 be incompatible on systems where plain "char" is signed.
4480 * The configure option --disable-versioning has been removed. Builds with
4481 --disable-versioning had not worked for several years.
4483 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
4484 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
4486 * SystemTap probes for malloc have been introduced.
4488 * SystemTap probes for slow multiple precision fallback paths of
4489 transcendental functions have been introduced.
4491 * Support for powerpc64le has been added.
4493 * The soft-float powerpc port now supports e500 processors.
4495 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
4497 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
4498 set of header declarations that are enabled by default, even when other
4499 feature test macros or compiler options such as -std=c99 would otherwise
4500 disable some of those declarations.
4502 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
4503 conflict with POSIX. The libbsd-compat library (which was a dummy library
4504 that did nothing) has also been removed.
4506 * Preliminary documentation about Multi-Thread, Async-Signal and
4507 Async-Cancel Safety has been added.
4509 * Change of ABI data structures for s390 and s390x:
4510 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
4511 allow for future hardware extensions. All library functions that accept or
4512 return these structures were versioned in order to provide backwards
4513 compatibility with existing code. However, not all cases can be handled
4514 with interface versioning. If an application embeds either structure into
4515 another structure and that structure is passed to another compilation unit
4516 which expects the newer larger-sized object then any access to the new
4517 fields will result in undefined behaviour. Similarly any access to fields
4518 that were moved by the enlarging of the structures will cause undefined
4519 behaviour. To fix the undefined behaviour all objects that are part of the
4520 final in-memory image must agree on the size of structures, and this may
4521 require recompilation.
4525 * The following bugs are resolved with this release:
4527 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
4528 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
4529 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
4530 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
4531 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
4532 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
4533 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
4534 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
4535 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
4536 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
4537 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
4538 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
4539 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
4542 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
4543 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
4544 Distributions can re-enable building and using pt_chown via the new configure
4545 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
4546 considerable security risks and should only be used if the distribution
4547 understands and accepts the risks.
4549 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
4552 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
4553 fixed (Bugzilla #15330).
4555 * Add support for calling C++11 thread_local object destructors on thread
4556 and program exit. This needs compiler support for offloading C++11
4557 destructor calls to glibc.
4559 * Improved worst case performance of libm functions with double inputs and
4562 * Support for priority inherited mutexes in pthread condition variables on
4563 non-x86 architectures.
4565 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
4567 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
4569 * Optimized string functions for ARM. Implemented by Will Newton and
4572 * Optimized libm functions for SPARC. Implemented by David S. Miller.
4574 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
4577 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
4578 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
4580 * Added a benchmark framework to track performance of functions in glibc.
4582 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
4583 It is based on draft TS 18661 and currently enabled as a GNU extension.
4585 * On Linux, the clock function now uses the clock_gettime system call
4586 for improved precision, rather than old times system call.
4588 * Added support for version-3 tz format files. This is needed when using
4589 the tz database release 2013e or later, and affects a few unusual cases --
4590 currently only TZ='America/Godthab' for time stamps after 2037.
4592 * Added new API functions pthread_getattr_default_np and
4593 pthread_setattr_default_np to get and set the default pthread
4594 attributes of a process.
4596 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
4597 This may improve lock scaling of existing programs on TSX capable systems.
4598 When the --enable-lock-elision=yes parameter is specified at configure
4599 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
4602 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
4603 availability). Implemented by Ryan S. Arnold.
4605 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
4609 * The following bugs are resolved with this release:
4611 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
4612 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
4613 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
4614 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
4615 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
4616 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
4617 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
4618 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
4619 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
4620 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
4621 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
4622 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
4623 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
4624 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
4625 14879, 14889, 14893, 14898, 14914.
4627 * Optimization of memcpy for MIPS.
4629 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
4630 EMFILE has been fixed (Bugzilla #14889).
4632 * The add-on ports collection is now distributed in the "ports" subdirectory
4633 of the main GNU C Library distribution, rather than separately.
4635 * Port to ARM AArch64 contributed by Linaro.
4637 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
4638 Optimized versions of memcpy, memset, and memcmp added for System z10 and
4640 Implemented by Andreas Krebbel.
4642 * The new function secure_getenv allows secure access to the environment,
4643 returning NULL if running in a SUID/SGID process. This function replaces
4644 the internal function __secure_getenv.
4646 * SystemTap static probes have been added into the dynamic linker.
4647 Implemented by Gary Benson.
4649 * Optimizations of string functions strstr, strcasestr and memmem.
4650 Implemented by Maxim Kuvyrkov.
4652 * The minimum Linux kernel version that this version of the GNU C Library
4653 can be used with is 2.6.16.
4655 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
4656 powerpc POWER7. Implemented by Will Schmidt.
4658 * New configure option --disable-nscd builds the C library such that it
4659 never attempts to contact the Name Service Caching Daemon (nscd).
4660 New configure option --disable-build-nscd avoids building nscd itself;
4661 this is the default if --disable-nscd is used.
4663 * Improved support for cross-compilation, including cross-testing and
4664 bootstrap builds without a previously built glibc.
4666 * Several testsuite tests are now able to test multiple IFUNC variants of an
4667 interface, rather than just testing the one that would be chooen by
4670 * New configure options --with-bugurl and --with-pkgversion, for
4671 distributors to use to embed their bug-reporting and package version
4672 information in --help and --version output.
4674 * The ttyname and ttyname_r functions on Linux now fall back to searching for
4675 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
4676 allows creation of chroots without the procfs mounted on /proc.
4678 * The `crypt' function now fails if passed salt bytes that violate the
4679 specification for those values. On Linux, the `crypt' function will
4680 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
4681 enabled, and fail on encrypted strings using the MD5 or DES algorithm
4682 when the mode is enabled.
4684 * The `clock_*' suite of functions (declared in <time.h>) is now available
4685 directly in the main C library. Previously it was necessary to link with
4686 -lrt to use these functions. This change has the effect that a
4687 single-threaded program that uses a function such as `clock_gettime' (and
4688 is not linked with -lrt) will no longer implicitly load the pthreads
4689 library at runtime and so will not suffer the overheads associated with
4690 multi-thread support in other code such as the C++ runtime library.
4692 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
4697 * The following bugs are resolved with this release:
4699 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
4700 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
4701 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
4702 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
4703 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
4704 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
4705 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
4706 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
4707 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
4708 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
4709 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
4710 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
4711 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
4712 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
4713 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
4714 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
4715 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
4716 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
4717 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
4718 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
4719 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
4720 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
4723 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
4724 configuring glibc with:
4725 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
4726 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
4727 Implemented by H.J. Lu.
4731 + define static_assert
4733 + do not declare gets
4735 + declare at_quick_exit and quick_exit also for ISO C11
4737 + aligned_alloc. NB: The code is deliberately allows the size parameter
4738 to not be a multiple of the alignment. This is a moronic requirement
4739 in the standard but it is only a requirement on the caller, not the
4742 + timespec_get added
4744 + uchar.h support added
4746 + CMPLX, CMPLXF, CMPLXL added
4748 Implemented by Ulrich Drepper.
4750 * Support for the IA-64 has been moved to ports.
4752 * Remove support for anything but ELF binary format
4754 * Checking versions of poll, ppoll added.
4755 Implemented by Ulrich Drepper.
4757 * More generic and 64-bit performance optimizations to math functions.
4758 Implemented by Ulrich Drepper.
4760 * New configure option --enable-obsolete-rpc makes the deprecated RPC
4761 headers and functions available at compile time as they were before
4762 version 2.14. This option will be removed at some time in the future
4763 after the TI-RPC library becomes fully sufficient for the needs of
4764 existing applications.
4766 * Compatibility code for Linux kernel versions before 2.4 has been removed.
4767 Note that glibc is not expected to work with any Linux kernel version
4770 * New header <sys/auxv.h> and function getauxval allowing easy access to
4771 the AT_* key-value pairs passed from the Linux kernel. The header also
4772 defines the HWCAP_* bits associated with the AT_HWCAP key.
4774 * New locales: mag_IN
4776 * New configure option --enable-systemtap builds SystemTap static probes
4777 into libc for setjmp and longjmp and into libpthread for various operations.
4778 So far the setjmp/longjmp probes and some of the libpthread probes are
4779 provided only for i*86 and x86_64.
4780 Implemented by Roland McGrath and Rayson Ho.
4782 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
4784 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
4787 * More optimized functions for SPARC. Implemented by David S. Miller.
4789 * Improved support for cross-compilation, especially bootstrap builds
4790 without a previously built glibc.
4792 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
4793 Chris Metcalf from Tilera.
4795 * Support for the old ARM ABI has been removed from ports. Only the EABI is
4796 now supported for ARM processors.
4798 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
4799 as the name of the dynamic linker, to distinguish it from the
4800 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
4802 * Support for CRIS has been removed from ports.
4804 * A new class of installed header has been documented for low-level
4805 platform-specific functionality. PowerPC added the first instance with a
4806 function to provide time base register access. Contributed by Tulio
4807 Magno Quites Machado Filho.
4809 * ix86 configurations now install header files that are consistent with
4810 what x86-64 configurations install. These same header files can be used
4811 for -m32, -m64, or -mx32 builds.
4812 Contributed by H.J. Lu.
4814 * Math library bug fixes. A thorough audit of all open math library bugs was
4815 conducted by Joseph Myers. Significant progress was made on many math
4816 library bugs resulting in more accurate exceptions and function results.
4817 Many thanks to all those that contributed including Andreas Jaeger for his
4818 patch review and work on the x87 trigonometric instruction issues.
4820 * Timezone data is no longer installed. Timezone-related binaries and scripts
4821 will continue to be installed. Users should obtain their timezone data from
4822 their distribution provider or from the tzdata package at
4823 <ftp://munnari.oz.au/pub/>.
4827 * The following bugs are resolved with this release:
4829 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
4830 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
4831 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
4832 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
4833 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
4834 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
4835 13484, 13506, 13515, 13523, 13524, 13538, 13540
4837 * New program pldd to list loaded object of a process
4838 Implemented by Ulrich Drepper.
4840 * Add nss_db support back to glibc. No more dependency on Berkeley db
4841 and support for initgroups lookups.
4842 Implemented by Ulrich Drepper.
4844 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4845 Contributed by HJ Lu.
4847 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4848 Contributed by HJ Lu.
4850 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4851 on x86-32 and x86-64.
4852 Contributed by Liubov Dmitrieva.
4854 * Optimized strchr and strrchr for SSE on x86-32.
4855 Contributed by Liubov Dmitrieva.
4857 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4858 for x86-64 and x86-32.
4859 Contributed by Liubov Dmitrieva.
4861 * New interfaces: scandirat, scandirat64
4862 Implemented by Ulrich Drepper.
4864 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4865 Implemented by Ulrich Drepper.
4867 * nscd now also caches the netgroup database.
4868 Implemented by Ulrich Drepper.
4870 * Integrate libm with gcc's -ffinite-math-only option.
4871 Implemented by Ulrich Drepper.
4873 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4874 to math functions. Implemented by Ulrich Drepper.
4876 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4877 Implemented by Ulrich Drepper.
4879 * New Linux interfaces: process_vm_readv, process_vm_writev
4881 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4882 Implemented by Ulrich Drepper.
4884 * Optimized nearbyint and strcasecmp for PPC.
4885 Implemented by Adhemerval Zanella.
4887 * New locales: bho_IN, unm_US, es_CU, ta_LK
4891 * The following bugs are resolved with this release:
4893 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4894 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4895 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4896 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4897 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4898 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4899 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4900 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4901 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4902 12795, 12811, 12813, 12814, 12841
4904 * The RPC implementation in libc is obsoleted. Old programs keep working
4905 but new programs cannot be linked with the routines in libc anymore.
4906 Programs in need of RPC functionality must be linked against TI-RPC.
4907 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4909 Visible changes of this change include (obviously) the inability to link
4910 programs using RPC functions without referencing the TI-RPC library and the
4911 removal of the RPC headers from the glibc headers.
4912 Implemented by Ulrich Drepper.
4914 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4915 syncfs, setns, sendmmsg
4917 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4918 yue_HK, lij_IT, mhr_RU
4920 * New encodings: CP770, CP771, CP772, CP773, CP774
4922 * New program sotruss to trace calls through PLTs
4923 Implemented by Ulrich Drepper.
4925 * The malloc hook implementation is marked deprecated and will be removed
4926 from the default implementation in the next version. The design never
4927 worked ever since the introduction of threads. Even programs which do
4928 not create threads themselves can use multiple threads created internally.
4932 * The following bugs are resolved with this release:
4934 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4935 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4936 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4937 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4940 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4942 * POWER7 optimizations: memset, memcmp, strncmp
4944 * New optimized string functions for x86-64: strnlen (SSE2),
4945 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4946 Implemented by Ulrich Drepper.
4950 * The following bugs are resolved with this release:
4952 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4953 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4954 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4955 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4956 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4957 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4958 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4959 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4961 * New interfaces: pthread_getname_np, pthread_setname_np
4963 * New Linux interface: recvmmsg
4965 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4967 * The dynamic linker now recognizes supported ABI versions from the
4968 EI_ABIVERSION field in the ELF header.
4969 Implemented by Ulrich Drepper.
4971 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4972 will not be used to fill in password fields in the passwd.byname replies.
4973 Instead it is used to synthesize the shadow.byname table, should it be
4974 missing. This is a useful mode in some installations involving Solaris.
4975 Implemented by Ulrich Drepper.
4977 * New locales: kok_IN, sq_MK, cv_RU
4981 * The following bugs are resolved with this release:
4983 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4984 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4985 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4986 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4987 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4988 10789, 10817, 10823, 10840, 10847
4990 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4992 Implemented by Ulrich Drepper.
4994 * Checking version of longjmp added that fails if an uninitialized stack
4995 frame would be created. Implemented by Ulrich Drepper.
4997 * STT_GNU_IFUNC is now supported in static executables.
4998 Implemented by H.J. Lu.
5000 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
5002 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
5003 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
5004 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
5005 Contributed by H.J. Lu.
5007 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
5008 Implemented by Ulrich Drepper.
5010 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
5012 Contributed by H.J. Lu.
5014 * Support for fma instruction in AVX on x86-64.
5015 Implemented by H.J. Lu and Ulrich Drepper.
5017 * AVX support in x86-64 auditing support in ld.so.
5018 Implemented by H.J. Lu.
5020 * STB_GNU_UNIQUE support added.
5021 Implemented by Ulrich Drepper.
5023 * Implement second fallback mode for optimized DNS lookup for even more
5024 broken environments. If two requests from the same port are not
5025 handled correctly close the socket and open a new one before sending
5026 the second request. The 'single-request-reopen' option in /etc/resolv.conf
5027 can be used to select this mode right away, instead of rediscovering the
5028 necessity is every process again.
5029 Implemented by Ulrich Drepper.
5031 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
5032 Implemented by Adam Tkac.
5034 * Optimized iconv conversions for S390x.
5035 Implemented by Andreas Krebbel.
5037 * Using condvars with PI mutexes is now more efficient due to kernel
5038 support for requeueing to PI futexes. NPTL support added for x86-64.
5039 Implemented by Ulrich Drepper.
5041 * New locales: ps_AF, my_MM
5045 * The following bugs are resolved with this release:
5047 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
5048 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
5049 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
5050 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
5051 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
5053 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
5054 Implemented by Ulrich Drepper.
5056 * New Linux interfaces: accept4, fallocate, fallocate64.
5057 Implemented by Ulrich Drepper.
5059 * Correct declarations of string function when used in C++ code. This
5060 could lead to compile errors for invalid C++ code.
5062 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
5065 * New POSIX 2008 interface: psiginfo
5066 Implemented by Ulrich Drepper.
5068 * New ISO C++1x interfaces: quick_exit, at_quick_exit
5069 Implemented by Ulrich Drepper.
5071 * Support for selecting between multiple function definitions at runtime
5072 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
5074 * The libcrypt library can now use the hash function implementations in
5075 NSS. Implemented by Ulrich Drepper.
5077 * The malloc implementation can be compiled to be less memory efficient
5078 but higher performing in multi-threaded programs.
5079 Implemented by Ulrich Drepper.
5081 * New locales: nan_TW@latin, ks_IN
5083 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
5084 Implemented by Ulrich Drepper.
5086 * Extended printf hook support. It is possible to use user-defined types
5087 and extend existing format specifiers.
5088 Implemented by Ulrich Drepper.
5090 * Handling for group shadow files has been added.
5091 Implemented by Ulrich Drepper.
5093 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
5094 servers (the case, e.g., for some people using the built-in DNS
5095 server in ADSL modems/routers). There is a once-per-process timeout
5096 in case of a broken server. To avoid it, users can run nscd or put
5097 'options single-request' in /etc/resolv.conf.
5098 Implemented by Ulrich Drepper.
5102 * The following bugs are resolved with this release:
5104 2447, 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447,
5105 6461, 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712,
5106 6713, 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839,
5107 6843, 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955,
5108 6966, 6968, 6974, 6980, 6995, 7008, 7009, 7029
5110 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
5111 up at the same time. Implemented by Ulrich Drepper.
5113 * TLS descriptors for LD and GD on x86 and x86-64.
5114 Implemented by Alexandre Oliva.
5116 * getaddrinfo now handles DCCP and UDPlite.
5117 Implemented by Ulrich Drepper.
5119 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
5120 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
5121 Implemented by Ulrich Drepper.
5123 * New implementation of memmem, strstr, and strcasestr which is O(n).
5124 Implemented by Eric Blake.
5126 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
5128 * Implement "e" option for popen to open file descriptor with the
5129 close-on-exec flag set. Implemented by Ulrich Drepper.
5131 * Implement "b" mode for fmemopen. In this mode writes writes don't
5132 implicitly add a NUL byte and seeks from the end of the buffer really
5133 use the buffer end, not the string length as the basis.
5134 Implemented by Ulrich Drepper.
5136 * Many functions, exported and internal, now atomically set the close-on-exec
5137 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
5139 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
5141 Implemented by Pravin Satpute.
5143 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
5147 * The following bugs are resolved with this release:
5149 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
5150 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
5151 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
5152 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
5153 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
5154 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
5155 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
5157 * New locales: bo_CN, bo_IN, shs_CA.
5159 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
5161 * Sorting rules for some Indian languages (Devanagari and Gujarati).
5162 Implemented by Pravin Satpute.
5164 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
5166 * nscd caches now all timeouts for DNS entries
5167 Implemented by Ulrich Drepper.
5169 * nscd is more efficient and wakes up less often.
5170 Implemented by Ulrich Drepper.
5172 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
5173 vdprintf, and obstack_vprintf.
5174 Implemented by Jakub Jelinek.
5176 * Faster memset for x86-64.
5177 Implemented by Harsha Jagasia and H.J. Lu.
5179 * Faster memcpy on x86.
5180 Implemented by Ulrich Drepper.
5182 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
5183 Implemented by Ulrich Drepper.
5185 * Faster sqrt and sqrtf implemention for some PPC variants.
5186 Implemented by Steven Munroe.
5190 * The following bugs are resolved with this release:
5192 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
5193 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
5194 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
5195 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
5196 5071, 5103, 5104, 5112, 5113, 5184, 5186
5198 * More checking functions: fread, fread_unlocked, open*, mq_open.
5199 Implemented by Jakub Jelinek and Ulrich Drepper.
5201 * Extend fortification to C++. Implemented by Jakub Jelinek.
5203 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
5204 by not recognizing 'a' as a modifier when those specs are requested.
5205 Implemented by Jakub Jelinek.
5207 * PPC optimizations to math and string functions.
5208 Implemented by Steven Munroe.
5210 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
5211 options to be passed. Implemented by Ulrich Drepper.
5213 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
5215 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
5216 Implemented by Ulrich Drepper.
5218 * Handle private futexes in the NPTL implementation.
5219 Implemented by Jakub Jelinek and Ulrich Drepper.
5221 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
5222 Implemented by Roland McGrath and Ulrich Drepper.
5224 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
5226 * SHA-256 and SHA-512 based password encryption.
5227 Implemented by Ulrich Drepper.
5229 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
5230 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
5233 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
5234 Implemented by Ulrich Drepper.
5238 * The following bugs are resolved with this release:
5240 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
5241 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
5242 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
5243 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
5244 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
5245 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
5246 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
5249 * New Linux interfaces: epoll_pwait, sched_getcpu.
5251 * New generic interfaces: strerror_l.
5253 * nscd can now cache the services database. Implemented by Ulrich Drepper.
5257 * The following bugs are resolved with this release:
5259 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
5260 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
5261 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
5262 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
5263 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
5264 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
5265 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
5266 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
5267 3225, 3251, 3252, 3253, 3273
5269 * For Linux, the sorting of addresses returned by getaddrinfo now also
5270 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
5271 Implemented by Ulrich Drepper.
5273 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
5274 Implemented by Ulrich Drepper.
5276 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
5278 * New iconv module for MIK. Contributed by Alexander Shopov.
5280 * For sites with broken group and/or passwd database, the auto-propagate
5281 option of nscd can prevent creating ID lookup entries from the results
5282 of a name lookup and vice versa. This usually is no problem but some
5283 site might have problems with the default behavior.
5284 Implemented by Ulrich Drepper.
5286 * Iterating over entire database in NIS can be slow. With the
5287 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
5288 to trade time for memory. The entire database will be read at once.
5289 Implemented by Ulrich Drepper.
5291 * The interfaces introduced in RFC 3542 have been implemented by
5294 * Support for the new ELF hash table format was added by Ulrich Drepper.
5296 * Support for priority inheritance mutexes added by Jakub Jelinek and
5299 * Support for priority protected mutexes added by Jakub Jelinek.
5301 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
5302 or_IN, csb_PL, fy_NL, sr_ME.
5306 * More overflow detection functions.
5308 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
5309 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
5311 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
5312 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
5313 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
5314 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
5315 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
5316 by Masahide Washizawa.
5318 * It is now possible to install audit libraries for the dynamic linker using
5319 LD_AUDIT. Implemented by Ulrich Drepper.
5321 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
5322 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
5323 For a libc and libpthread that works well on Linux 2.4 kernels, we
5324 recommend using the stable 2.3 branch.
5326 * The new function open_wmemstream acts like open_memstream,
5327 but uses a wchar_t wide character buffer.
5329 * The new function ppoll is an improved version of poll, similar to pselect.
5331 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
5332 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
5333 renameat, unlinkat, linkat, symlinkat, readlinkat.
5335 * New Linux kernel system calls: unshare,
5336 inotify_init, inotify_add_watch, inotify_rm_watch.
5338 * The euidaccess function is now also known by the alias eaccess,
5339 for compatibility with some other systems.
5341 * Timezone data updated to 2006b version.
5345 * The following bugs are resolved with this release:
5347 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
5348 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
5349 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
5350 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
5351 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
5352 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
5354 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5356 * As of this release, GCC 4 can be used to compile the C Library.
5358 * Timezone data updated to 2005m version.
5362 * The following bugs are resolved with this release:
5364 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
5365 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
5366 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
5367 777, 787, 821, 822, 823, 825
5369 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5373 * Support for RFC 3678. Real implementations exist only for Linux so far.
5374 Implemented by Ulrich Drepper.
5376 * nscd can now cache entries persistently. Expiring entries are reloaded.
5377 For speedups the cache can be shared in memory with client processes.
5378 Implemented by Ulrich Drepper.
5380 * nscd can now perform SELinux checks.
5381 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
5383 * getaddrinfo queries are now cached. Canonical name lookup is performed
5385 Implemented by Ulrich Drepper.
5387 * The nothrow function attribute is used when headers are used by gcc when
5388 compiling C code. This can avoid significant amounts of exception
5391 * The malloc functions perform more error checking and are stricter when
5392 it comes to reacting on errors. The default action is to terminate
5393 the process after showing an error message. Implemented by Ulrich Drepper.
5395 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
5396 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
5398 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
5399 namespaces using the new function dlmopen(). This feature is of course,
5400 like most other dynamic loading functionality, not available in statically
5401 linked applications. Implemented by Ulrich Drepper.
5403 * Low-overhead boundary checking variants of string and some stdio functions
5404 were added. These are to be used in conjunction with a gcc patch by
5405 Jakub Jelinek which adds calls to these functions if possible.
5406 Implemented by Jakub Jelinek and Ulrich Drepper.
5408 * Old code for several operating systems and machine architectures that
5409 have not been in working condition in a long time have been removed from
5410 the main source tree maintained by the GNU C Library's maintainers.
5411 These files are now reside in the separate `ports' source module
5412 that is usable as an add-on when building the library.
5416 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
5417 interrogate the dynamic linker, compatible with the Solaris interface.
5419 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
5420 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
5422 * getifaddrs now uses the netlink interface on Linux to get its information.
5423 Implemented by Thorsten Kukuk.
5425 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
5426 Implemented by Ulrich Drepper.
5428 * support for non-executable stacks on x86 has been added. Changes mostly
5431 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
5434 * getaddrinfo now performs destination address selection according to
5439 * Thread-safe interfaces for many functions that access locale data
5440 were added in version 2.3, but these features were omitted from NEWS.
5441 Many functions have variants with an `_l' suffix that take a `locale_t'
5442 object as a parameter rather than consulting the current locale.
5443 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
5444 create and maintain `locale_t' objects. Additionally, the new function
5445 `uselocale' sets "the current locale" (as used by functions not so
5446 parameterized) set for an individual thread. These features were added
5447 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
5449 * The functions getresuid, getresgid, setresuid, and setresgid, which
5450 have long been available on Linux, are now declared in <unistd.h>
5451 and are now also available on the Hurd.
5453 * ELF thread-local storage support (TLS) now works on x86-64.
5455 * The new dynamic string token $LIB is expanded in shared library names.
5456 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
5458 * Aldy Hernandez contributed complete software floating point support for
5459 PowerPC machines with no FPU.
5461 * fexecve is implemented on Linux.
5463 * The `btowc' function should work at least twice as fast due to
5464 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
5466 * With approriate thread add-ons cancelable functions are now implemented
5467 in libc.so as well. No need to call the function in libpthread. This
5468 change allowed to finally disable the incorrect and expensive handling
5469 of weak definition in ld.so.
5471 * Yet more PLT entries in libc.so have been removed. We finally arrived
5472 at the bare minimum. Startup times improved appropriately.
5474 * Support for the new Linux/x86 system call interface was added. The
5475 AT_SYSINFO auxiliary vector entry is recognized and handled.
5479 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
5482 * iconv (the program and the interface) now accepts empty names (excluding
5483 options like //TRANSLIT) to mean "use charset of current locale".
5485 * localedef can now transliterate characters in strings which are not in
5486 the provided charmap. The information from the input locale is used.
5488 * Prelinking support was added for ELF targets. This requires additional
5489 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
5491 * Read-only stdio streams now use mmap to speed up operation by eliminating
5492 copying and buffer underflows. To use add 'm' to the mode string of
5493 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
5495 * The malloc functions were completely rewritten by Wolfram Gloger based
5496 on Doug Lea's malloc-2.7.0.c.
5498 * Isamu Hasegawa contributed a completely new and POSIX-conformant
5499 implementation of regex.
5501 * Bruno Haible upgraded the iconv and locale implementation to support
5504 * Contents of the LC_* and LANG environment variables in the CEN style are
5505 not recognized anymore. It never was used. Change by Ulrich Drepper.
5507 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
5508 thread-local storage (TLS) ABI on some platforms.
5509 Changes by Ulrich Drepper. SH support by Kaz Kojima.
5511 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
5512 EUC-JISX0213, and TSCII.
5514 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
5515 BSD-compatible interface for getting all network interface addresses.
5516 Implementation for IPv4 by Roland McGrath.
5518 * Loading of locale data is faster due to the introduction of a locale
5519 archive. Implemented by Roland McGrath and Ulrich Drepper.
5521 * Startup times are significantly reduced by not using exported functions
5522 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
5525 * Steven Munroe contributed a port to PowerPC64/Linux.
5529 * The Hurd now uses the GNU libio implementation of stdio rather than the
5530 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
5532 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
5533 with the same behavior as the Linux system call of the same name.
5537 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
5538 128-bit long double format.
5540 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
5541 IBM1161, and IBM1162 charsets.
5543 * Andreas Jaeger contributed a port to x86-64/Linux.
5545 * Peter Bruin contributed a port to PowerPC/Hurd.
5547 * libc functions using I/O streams now can handle wide-oriented streams
5550 * optimizations in the dynamic linker. Binaries created by recent binutils
5551 versions start up quicker due to reduced time spent on relocations.
5553 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
5557 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
5558 asinh, atanh, j0 for the 128-bit long double format.
5560 * Bruno Haible updated all the code handling Unicode in some form to
5561 support Unicode 3.1.
5563 * Speed of regex for single-byte locales is back to previous levels.
5564 Patch by Isamu Hasegawa.
5566 * Alpha, SPARC, and IA-64 now also using floating stacks.
5568 * Startup time of internationalized applications greatly improved through
5569 iconv cache. Use iconvconfig to generate the cache file.
5570 Contributed by Ulrich Drepper.
5572 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
5573 severe performance problems. Patch by David Mosberger.
5575 * The Hurd port got a lot more functionality like AIO, various stdio
5576 extensions, etc. Mainly done by Roland McGrath.
5578 * mtrace can now lookup symbols in shared libraries.
5582 * Intel's IA-64 math library is largely integrated. It provides fast and
5583 accurate implementatations for most basic and standard math functions
5584 in float, double, and long double format.
5586 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
5587 and asin for the 96-bit long double format and asin, log, tan for the
5588 128-bit long double format.
5590 * The beginning of a last-bit accurate math library by IBM Haifa were added.
5591 The basic double functions exist today. Contributed by Abraham Ziv
5592 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
5593 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
5595 * An asynchronous name lookup library was added. The interface is designed
5596 after POSIX AIO. The proposal was circulated beforehand to get comments.
5597 No negative ones came in. Implemented by Ulrich Drepper.
5599 * Port to S390/64bit contributed by Martin Schwidefsky
5600 <schwidefsky@de.ibm.com>.
5602 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
5603 of functions for Linux/IA-64.
5605 * The RPC code is now thread safe. Threads can now use the same service
5606 of different services at the same time. Patch by Eric Norum
5607 <eric.norum@usask.ca> with some help by Ulrich Drepper.
5609 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
5610 family of functions for Linux/S390.
5612 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
5613 of functions for Linux/x86.
5615 * Port to Linux/CRIS contributed by Axis Communications.
5619 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
5620 we can now check for namespace violations and missing declarations. The
5621 result is that almost all headers are now Unix-compliant (as defined in
5622 the upcoming XPG6). The negative side is that some programs might need
5623 corrections, too, if they depend on the incorrect form of the headers in
5624 previous versions which defined too many symbols and included too many
5627 * regex now handles multibyte character sets correctly.
5628 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
5630 * iconv (the program) does now conform to the upcoming XPG6 and handles
5631 charmaps. Instead of the charset names the path of charmaps can be
5632 provided and the conversion happens based on this data.
5633 Contributed by Ulrich Drepper.
5635 * The locale program now provides detailed information about the installed
5640 only lists the names of the supported locales
5644 provides details such as country, language, and codeset name.
5645 Contributed by Ulrich Drepper.
5649 * The gencat program now parses the input file according to the charset
5650 selected by the LC_CTYPE category. This is important for stateful
5651 character sets. To make generating catalogs easier there is a way
5652 to overwrite the charset selected by the locale: before the first
5653 message or $ quote line the catalog can contain a line like
5655 $ codeset=ISO-8859-2
5657 to select the charset (ISO-8859-2 in this case).
5659 Implemented by Shinya Hanataka and Ulrich Drepper.
5661 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
5662 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
5663 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
5665 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
5666 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
5668 * The LANGUAGE environment variable is now ignored unless the locale is
5669 changed from the default "C" locale.
5671 * The usual bug fixes.
5675 * Greg McGary added runtime support for bounds checking using gcc's
5676 new -fbounded-pointers option. ix86 target is complete. PowerPC
5679 * Thorsten Kukuk added secure mode support to nscd.
5681 * The Berkeley db libraries have been removed.
5683 Related, the nss_db module is now in a separate package since it
5684 obviously requires a database library being available.
5686 * Wide character I/O streams implemented by Ulrich Drepper.
5688 * Functions from the extended socket API added by Ulrich Drepper.
5690 * Functions feenableexcept and fedisableexcept to control the
5691 behaviour of individual exceptions have been added by Andreas Jaeger.
5693 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
5695 * The resolver code has been updated from bind 8.2.3-T5B which supports
5696 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
5699 This change could in some situations effect backward compatibility. Since
5700 now `_res' is a thread-local instead of a global variable, modifying it
5701 in one thread does not have any effect in other threads.
5703 The resolver library was also extended to allow IPv6 as the transport
5704 protocol for the requests. This work was done by Stig Venaas.
5706 * Compatibility code for K&R C compilers has been removed from the
5707 header files. A ISO C compiler is needed to use the library
5708 (conforming to either C89 or C99 standard).
5710 * Complete rewrite of the localedef program to support multibyte character
5711 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
5712 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
5713 Implemented by Ulrich Drepper.
5715 Bruno Haible significantly improved the generation and use of the data
5716 structures for the wide character tables.
5718 * Plural handling in gettext implemented by Ulrich Drepper.
5720 * The utmp daemon has been removed.
5722 * The port to MIPS-Linux has been finished by Andreas Jaeger.
5724 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
5727 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
5729 * POSIX barriers implemented by Kaz Kylheku.
5731 * POSIX spawn function family implemented by Ulrich Drepper.
5733 * POSIX spinlocks are now available.
5735 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
5737 * the configure option --enable-kernel=X.Y.Z allows to strip out
5738 compatibility for kernel versions before X.Y.Z. This is currently only
5739 implemented for Linux.
5741 * the sockaddr_in6 structure changed. The IPv6 working group added a new
5742 field sin6_scope_id. This means that all programs using IPv6 should be
5743 recompiled. Don't expect binary compatibility with previous glibc
5746 * various conversion modules for IBM character sets contributed by
5749 * IA-64 port by Jes Sorensen and HJ Lu.
5763 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
5765 * New xdr functions are added; some rpc functions are now 64bit clean.
5767 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
5769 * Fixed known incompatibilities with glibc 2.0.
5771 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
5773 * Optimized a number of functions (especially the ELF dynamic loader).
5775 * Update timezone data files.
5777 * lots of charmaps corrections
5779 * some new locale definitions and charmaps
5784 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
5785 conform to POSIX member type requirements. Symbol versions have been
5786 adjusted as needed within the library, and for direct use by applications,
5787 but there is potential for problems if third-party libraries use
5788 struct timeval as part of their interface. This does not present
5789 a problem for X and other "essential" system libraries.
5791 * An additional locale model to support C++ Standard Library locale
5792 model and probably more was implemented by Ulrich Drepper.
5794 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
5797 * Miles Bader provided the `argp' function family to support hierachical
5798 command line argument parsing, layered on top of getopt.
5800 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
5802 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
5805 * scanf recognizes the %a and %A format for scanning floating point numbers.
5807 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
5808 information and interfaces for the available integer types.
5810 * about 130 new math functions were added to implement the ISO C9x math
5813 * the new header <complex.h> contains definitions of the complex math
5814 functions from ISO C 9X.
5816 * the new header <tgmath.h> defines generic macros to use complex or
5817 real valued functions.
5819 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
5821 * Andreas Jaeger provided a test suite for the math library.
5823 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
5825 * Ulrich Drepper added character set conversion functions (iconv).
5827 * Optimized string functions have been added.
5829 * The localedata addon is now part of glibc.
5831 * An implementation of profiling shared libraries was added by Ulrich Drepper.
5833 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
5834 daemon for NSS (nscd).
5836 Missing a better place here are some numbers on improvements. Under
5837 Linux 2.1.125 un-tar-ing the kernel sources takes
5841 using local files 12.19s 6.88s 22.91s
5843 using NIS 13.92s 8.91s 26.34s
5845 using NIS & nscd 10.37s 7.34s 25.30s
5847 using NIS+ 27.57s 30.37s 640.46s
5849 using NIS+ & nscd 10.25s 7.83s 26.51s
5851 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5853 Keep in mind that non-namelookup related operations dominate above times.
5854 It was just a common complain that using NIS+ unpacking the kernel is
5857 [1] The old nscd implementation is not available anymore since it was
5858 distributed with glibc up to version 2.0.98 and thus is now replaced.
5860 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5862 * Mark Kettenis provided a Hesiod NSS module.
5864 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5865 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5867 * rcmd can now handle netgroups (Dick Streefland).
5869 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5872 * Support for the IPv6 protocol has been added to the socket API, as per the
5873 latest draft standards.
5875 * Support for Linux 2.2 has been added.
5877 * Interface changes relative to the latest 2.0.x release:
5878 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5879 addseverity NEW: Unix98
5880 alphasort64 NEW: LFS
5881 argp_err_exit_status NEW: argp, GNU ext
5882 argp_error NEW: argp, GNU ext
5883 argp_failure NEW: argp, GNU ext
5884 argp_help NEW: argp, GNU ext
5885 argp_parse NEW: argp, GNU ext
5886 argp_program_bug_address NEW: argp, GNU ext
5887 argp_program_version NEW: argp, GNU ext
5888 argp_program_version_hook NEW: argp, GNU ext
5889 argp_state_help NEW: argp, GNU ext
5890 argp_usage NEW: argp, GNU ext
5891 authdes_create NEW: Secure RPC
5892 authdes_getucred NEW: Secure RPC
5893 authdes_pk_create NEW: Secure RPC
5894 backtrace NEW: GNU ext.
5895 backtrace_symbols NEW: GNU ext.
5896 backtrace_symbols_fd NEW: GNU ext.
5898 cacosf NEW: ISO C 9x
5899 cacosh NEW: ISO C 9x
5900 cacoshf NEW: ISO C 9x
5901 cacoshl NEW: ISO C 9x
5902 cacosl NEW: ISO C 9x
5909 casinf NEW: ISO C 9x
5910 casinh NEW: ISO C 9x
5911 casinhf NEW: ISO C 9x
5912 casinhl NEW: ISO C 9x
5913 casinl NEW: ISO C 9x
5915 catanf NEW: ISO C 9x
5916 catanh NEW: ISO C 9x
5917 catanhf NEW: ISO C 9x
5918 catanhl NEW: ISO C 9x
5919 catanl NEW: ISO C 9x
5920 cbc_crypt NEW: Secure RPC
5924 ccoshf NEW: ISO C 9x
5925 ccoshl NEW: ISO C 9x
5931 cimagf NEW: ISO C 9x
5932 cimagl NEW: ISO C 9x
5933 clearerr_locked REMOVED
5934 clntunix_create NEW: sunrpc ext
5936 clog10 NEW: ISO C 9x
5937 clog10f NEW: ISO C 9x
5938 clog10l NEW: ISO C 9x
5948 cprojf NEW: ISO C 9x
5949 cprojl NEW: ISO C 9x
5951 crealf NEW: ISO C 9x
5952 creall NEW: ISO C 9x
5957 csinhf NEW: ISO C 9x
5958 csinhl NEW: ISO C 9x
5961 csqrtf NEW: ISO C 9x
5962 csqrtl NEW: ISO C 9x
5966 ctanhf NEW: ISO C 9x
5967 ctanhl NEW: ISO C 9x
5969 des_setparity NEW: Secure RPC
5970 ecb_crypt NEW: Secure RPC
5971 endutxent NEW: Unix98
5973 exp10f NEW: ISO C 9x
5974 exp10l NEW: ISO C 9x
5978 fattach NEW: STREAMS
5979 fdetach NEW: STREAMS
5983 feclearexcept NEW: ISO C 9x
5984 fegetenv NEW: ISO C 9x
5985 fegetexceptflag NEW: ISO C 9x
5986 fegetround NEW: ISO C 9x
5987 feholdexcept NEW: ISO C 9x
5989 feraiseexcept NEW: ISO C 9x
5990 ferror_locked REMOVED
5991 fesetenv NEW: ISO C 9x
5992 fesetexceptflag NEW: ISO C 9x
5993 fesetround NEW: ISO C 9x
5994 fetestexcept NEW: ISO C 9x
5995 feupdateenv NEW: ISO C 9x
5996 fflush_locked REMOVED
6000 fgets_unlocked NEW: GNU ext.
6001 fileno_locked REMOVED
6013 fputc_locked REMOVED
6014 fputs_unlocked NEW: GNU ext.
6015 fread_unlocked NEW: GNU ext.
6020 fstatvfs NEW: Unix98
6024 ftruncate64 NEW: LFS
6026 fwrite_unlocked NEW: GNU ext.
6027 gai_strerror NEW: IPv6
6031 getchar_locked REMOVED
6033 getdate_err NEW: Unix98
6034 getdate_r NEW: GNU ext.
6036 getnameinfo NEW: IPv6
6037 getnetname NEW: Secure RPC
6038 getpmsg NEW: STREAMS
6039 getpt NEW: Unix98 PTY
6040 getrlimit64 NEW: LFS
6041 getutxent NEW: Unix98
6042 getutxid NEW: Unix98
6043 getutxline NEW: Unix98
6044 glob64 NEW: GNU ext.
6045 globfree64 NEW: GNU ext.
6046 gnu_get_libc_release NEW: GNU ext.
6047 gnu_get_libc_version NEW: GNU ext.
6048 grantpt NEW: Unix98 PTY
6049 host2netname NEW: Secure RPC
6051 iconv_close NEW: iconv
6052 iconv_open NEW: iconv
6053 if_freenameindex NEW: IPv6
6054 if_indextoname NEW: IPv6
6055 if_nameindex NEW: IPv6
6056 if_nametoindex NEW: IPv6
6057 in6addr_any NEW: IPv6
6058 in6addr_loopback NEW: IPv6
6059 inet6_isipv4mapped NEW: IPv6
6060 isastream NEW: STREAMS
6061 iswblank NEW: GNU ext.
6062 key_decryptsession NEW: Secure RPC
6063 key_decryptsession_pk NEW: Secure RPC
6064 key_encryptsession NEW: Secure RPC
6065 key_encryptsession_pk NEW: Secure RPC
6066 key_gendes NEW: Secure RPC
6067 key_get_conv NEW: Secure RPC
6068 key_secretkey_is_set NEW: Secure RPC
6069 key_setnet NEW: Secure RPC
6070 key_setsecret NEW: Secure RPC
6071 llrint NEW: ISO C 9x
6072 llrintf NEW: ISO C 9x
6073 llrintl NEW: ISO C 9x
6074 llround NEW: ISO C 9x
6075 llroundf NEW: ISO C 9x
6076 llroundl NEW: ISO C 9x
6081 lrintf NEW: ISO C 9x
6082 lrintl NEW: ISO C 9x
6083 lround NEW: ISO C 9x
6084 lroundf NEW: ISO C 9x
6085 lroundl NEW: ISO C 9x
6087 makecontext NEW: Unix98
6088 mempcpy NEW: GNU ext.
6091 modify_ldt NEW: kernel
6095 nearbyint NEW: ISO C 9x
6096 nearbyintf NEW: ISO C 9x
6097 nearbyintl NEW: ISO C 9x
6098 netname2host NEW: Secure RPC
6099 netname2user NEW: Secure RPC
6100 nexttoward NEW: ISO C 9x
6101 nexttowardf NEW: ISO C 9x
6102 nexttowardl NEW: ISO C 9x
6106 passwd2des NEW: Secure RPC
6108 pow10f NEW: GNU ext.
6109 pow10l NEW: GNU ext.
6112 printf_size NEW: GNU ext.
6113 printf_size_info NEW: GNU ext.
6114 profil_counter REMOVED
6115 pthread_mutexattr_getkind_np REPLACED
6116 pthread_mutexattr_setkind_np REPLACED
6117 ptsname NEW: Unix98 PTY
6118 ptsname_r NEW: Unix98 PTY
6120 putchar_locked REMOVED
6121 putgrent NEW: GNU ext.
6123 putpmsg NEW: STREAMS
6124 pututxline NEW: Unix98
6128 readdir64_r NEW: LFS
6129 remquo NEW: ISO C 9x
6130 remquof NEW: ISO C 9x
6131 remquol NEW: ISO C 9x
6133 roundf NEW: ISO C 9x
6134 roundl NEW: ISO C 9x
6136 scalbln NEW: ISO C 9x
6137 scalblnf NEW: ISO C 9x
6138 scalblnl NEW: ISO C 9x
6140 sendfile NEW: kernel
6141 setcontext NEW: Unix98
6142 setrlimit64 NEW: LFS
6143 setutxent NEW: Unix98
6145 sigignore NEW: Unix98
6146 sigqueue NEW: POSIX.1b
6147 sigrelse NEW: Unix98
6148 sigset NEW: POSIX.1b
6149 sigtimedwait NEW: POSIX.1b
6150 sigwaitinfo NEW: POSIX.1b
6151 sincos NEW: GNU ext.
6152 sincosf NEW: GNU ext.
6153 sincosl NEW: GNU ext.
6157 strcasestr NEW: GNU ext.
6158 strtoimax NEW: ISO C 9x
6159 strtoumax NEW: ISO C 9x
6160 strverscmp NEW: GNU ext.
6161 svcauthdes_stats NEW: Secure RPC
6162 svcunix_create NEW: sunrpc etx
6163 svcunixfd_create NEW: sunrpc ext
6164 swapcontext NEW: Unix98
6165 tcgetsid NEW: Unix98 PTY
6166 tdestroy NEW: GNU ext.
6167 tgamma NEW: ISO C 9x
6168 tgammaf NEW: ISO C 9x
6169 tgammal NEW: ISO C 9x
6173 truncf NEW: ISO C 9x
6174 truncl NEW: ISO C 9x
6176 unlockpt NEW: Unix98 PTY
6177 updwtmpx NEW: Unix98
6178 user2netname NEW: Secure RPC
6179 utmpxname NEW: Unix98
6180 versionsort NEW: GNU ext.
6181 versionsort64 NEW: GNU ext.
6183 wcscasecmp NEW: GNU ext.
6184 wcsncasecmp NEW: GNU ext.
6185 wcsnlen NEW: GNU ext.
6186 wcstoimax NEW: ISO C 9x
6187 wcstoll NEW: ISO C 9x
6188 wcstoull NEW: ISO C 9x
6189 wcstoumax NEW: ISO C 9x
6191 wordexp NEW: POSIX.2
6192 wordfree NEW: POSIX.2
6193 write_profiling REMOVED
6194 xdecrypt NEW: Secure RPC
6195 xdr_authdes_cred NEW: Secure RPC
6196 xdr_authdes_verf NEW: Secure RPC
6197 xdr_cryptkeyarg NEW: Secure RPC
6198 xdr_cryptkeyarg2 NEW: Secure RPC
6199 xdr_cryptkeyres NEW: Secure RPC
6200 xdr_getcredres NEW: Secure RPC
6201 xdr_key_netstarg NEW: Secure RPC
6202 xdr_key_netstres NEW: Secure RPC
6203 xdr_keybuf NEW: Secure RPC
6204 xdr_keystatus NEW: Secure RPC
6205 xdr_netnamestr NEW: Secure RPC
6206 xdr_sizeof NEW: Secure RPC
6207 xdr_unixcred NEW: sunrpc ext
6208 xencrypt NEW: Secure RPC
6209 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6220 * inet_ntoa is thread-safe
6222 * updwtmp is moved from libutil to libc
6224 * rewrite of cbrt function
6226 * update of timezone data
6240 * add atoll function
6242 * fix complex problems in Berkeley DB code
6244 * fix math functions
6248 * fixed lots of header problems (especially Linux/GNU specific)
6250 * dynamic loader preserves all registers
6252 * Roland McGrath provided support for handling of auxiliary objects in
6253 the ELF dynamic loader.
6255 * support for parallel builds is improved
6259 * GNU extensions are no longer declared by default. To enable them you
6260 must define the macro `_GNU_SOURCE' in your program or compile with
6263 * The library has changed from using GNU ld symbol aliases to using weak
6264 symbols where available. The ELF object file format supports weak
6265 symbols; GNU ld also supports weak symbols in the a.out format. (There
6266 is also now support for other GNU ld extensions in ELF. Use the
6267 `--with-elf' option to configure to indicate you have ELF, and
6268 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
6269 of many files which contained only symbol aliases, reducing the size of
6270 the source and the compiled library; many other files were renamed to
6271 less cryptic names previously occupied by the symbol alias files.
6272 There is a new header file <elf.h> for programs which operate on
6273 files in the ELF format.
6275 * Converted to Autoconf version 2, so `configure' has more options.
6276 Run `configure --help' to see the details.
6278 * The library can now be configured to build profiling, highly-optimized
6279 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
6280 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
6281 `configure' enable building these extra libraries. The shared library is
6282 built by default when using both ELF and GNU ld. When shared libraries
6283 are enabled, the new library `-ldl' is available for arbitrary run-time
6284 loading of shared objects; its interface is defined in <dlfcn.h>. The
6285 new header file <link.h> gives access to the internals of the run-time
6286 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
6287 application of same name on other systems and it provides information
6288 about dynamically linked binaries.
6290 * The C library now provides the run-time support code for profiling
6291 executables compiled with `-pg'. Programs can control the profiling code
6292 through the interface in <sys/gmon.h>. The `gmon.out' files written by
6293 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
6294 the support for this file format was contributed by David Mosberger-Tang.
6296 * The math code has been replaced with a math library based on fdlibm from
6297 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
6298 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
6299 functions. The math functions now reside in a separate library, so
6300 programs using them will need to use `-lm' their linking commands.
6302 * John C. Bowman contributed optimized ix87 assembler inline functions.
6304 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
6305 mechanism similar to that found in Solaris 2. This is now used for the
6306 group, passwd, hosts, networks, services, protocols, rpc, ethers,
6307 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
6308 file controls what services are used for each individual database. This
6309 works by loading shared libraries with names specified in `nsswitch.conf',
6310 so service modules can be changed or added at any time without even
6311 relinking any program. Currently there are the file, db, and NIS based
6312 NSS services available.
6314 * The new functions `strtoq' and `strtouq' parse integer values from
6315 strings, like `strtol' and `strtoul', but they return `long long int' and
6316 `unsigned long long int' values, respectively (64-bit quantities).
6318 * The new functions `strtof' and `strtold' parse floating-point values from
6319 strings, like `strtod', but they return `float' and `long double' values,
6320 respectively (on some machines `double' and `long double' are the same).
6322 * Ulrich Drepper has contributed new implementations of the floating-point
6323 printing and reading code used in the `printf' family of functions and
6324 `strtod', `strtof', and `strtold'. These new functions are perfectly
6325 accurate, and much faster than the old ones.
6327 * The implementation of the POSIX locale model was completely rewritten by
6328 Ulrich Drepper. This includes the new programs `localedef' and `locale'
6329 to compile the POSIX locale definition.
6331 * The former dummy implementations of the strcoll and strxfrm function are
6332 now replaced by fully functional code contributed by Ulrich Drepper. The
6333 collation information comes from the POSIX locale definitions.
6335 * The new header <langinfo.h> defines an interface for accessing
6336 various locale-dependent data (using the locale chosen with `setlocale').
6338 * Ulrich Drepper has contributed a new suite of functions for operation on
6339 wide-character and multibyte-character strings, in <wchar.h>;
6340 and classification and case conversion of wide characters, in <wctype.h>.
6341 These new functions are conforming to the ISO C, Amendement 1 specification.
6343 * There is now a second implementation of the standard I/O library available.
6344 It comes from GNU libg++ as was written by Per Bothner, heavily modified
6345 by Hongjiu Lu and made thread safe by Ulrich Drepper.
6347 * You can now use positional parameter specifications in format strings
6348 for the `printf' and `scanf' families of functions. For example,
6349 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
6350 ``Number 6, Mr Jones''. This is mainly useful when providing different
6351 format strings for different languages, whose grammars may dictate
6352 different orderings of the values being printed. To support this
6353 feature, the interface for `register_printf_handler' has changed; see
6354 the header file <printf.h> for details.
6356 * The `printf' and `scanf' families of functions now understand a new
6357 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
6358 to group numbers as indicated by the locale; for `scanf' and friends, this
6359 says to accept as valid only a number with all the proper grouping
6360 separators in the right places. In the default "C" locale, numbers are
6361 not grouped; but locales for specific countries will define the usual
6362 conventions (i.e. separate thousands with `,' in the US locale).
6364 * The pgrp functions have been regularized, slightly incompatibly but much
6365 less confusingly. The core functions are now `getpgid' and `setpgid',
6366 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
6367 argument) and BSD `setpgrp' (identical to `setpgid') functions are
6368 provided for compatibility. There is no longer an incompatible `getpgrp'
6369 with an argument declared under _BSD_SOURCE; no BSD code uses it.
6371 * The new header file <fts.h> and suite of functions simplify programs that
6372 operate on directory trees. This code comes from 4.4 BSD.
6374 * The resolver code has been updated from the BIND 4.9.5-P1 release.
6375 Parts of the code were heavily modified by Ulrich Drepper to fit in the
6376 NSS scheme used in glibc.
6378 * There is a new malloc debugging hook `__memalign_hook'.
6380 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
6381 `unsigned int' in <sys/types.h>. These are for compatibility only and
6382 their use is discouraged.
6384 * The `-lmcheck' library to enable standard malloc debugging hooks is now
6385 done differently, so that it works even without GNU ld.
6387 * New function `euidaccess' checks allowed access to a file like `access',
6388 but using the effective IDs instead of the real IDs.
6390 * The time zone data files have been updated for the latest and greatest
6391 local time conventions of the countries of the world.
6393 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
6396 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
6397 for formatting floating-point numbers. They are provided only for
6398 compatibility; new programs should use `sprintf' instead. There are
6399 also equivalent function for the `long double' floating-point type and
6400 all functions also exist in a reentrant form.
6402 * The new auxiliary library `-lutil' from 4.4 BSD contains various
6403 functions for maintaining the login-record files (primarily of use to
6404 system programs such as `login'), and convenient functions for
6405 allocating and initializing a pseudo-terminal (pty) device.
6407 * Ulrich Drepper has contributed new support for System V style
6408 shared memory and IPC on systems that support it.
6410 * Ulrich Drepper has contributed several miscellaneous new functions found
6411 in System V: The `hsearch' family of functions provide an effective
6412 implementation of hash tables; `a64l' and `l64a' provide a very simple
6413 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
6416 * Ulrich Drepper has contributed new reentrant counterparts for the
6417 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
6419 * Ulrich Drepper has contributed new, highly-optimized versions of several
6420 string functions for the i486/Pentium family of processors.
6422 * Ulrich Drepper has updated the Linux-specific code, based largely
6423 on work done in Hongjiu Lu's version of GNU libc for Linux.
6424 The GNU library now supports Linux versions 2.0.10 and later,
6425 using the ELF object file format (i[3456]86-*-linux).
6427 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
6429 * David Mosberger-Tang and Richard Henderson have ported the C library
6430 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
6431 dynamic linking support for ELF/Alpha.
6433 * Richard Henderson contributed several Alpha optimized assembler function
6434 for arithmetic and string handling.
6436 * Ulrich Drepper has contributed a new set of message catalog functions to
6437 support multiple languages using the <libintl.h> interface, for use with
6438 his new package GNU gettext. Translation volunteers have contributed
6439 catalogs of the library's messages in Spanish, German, and Korean.
6441 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
6442 program and the `catgets' function for reading the catalog files it
6443 creates. (The <libintl.h> interface is preferred; we include the
6444 <nl_types.h> interface using `catgets' only for source compatibility with
6445 programs already written to use it.)
6447 * New header file <values.h> gives SVID-compatible names for <limits.h>
6450 * Various new macros, declarations, and small header files for compatibility
6453 * New function `group_member' is a convenient way to check if a process has
6454 a given effective group ID.
6456 * When using GCC 2.7 and later, the socket functions are now declared in a
6457 special way so that passing an argument of type `struct sockaddr_in *',
6458 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
6459 `struct sockaddr *' type, does not generate a type-clash warning.
6461 * New function `error' declared in header file <error.h> is a convenient
6462 function for printing error messages and optionally exiting; this is the
6463 canonical function used in GNU programs. The new functions `err', `warn',
6464 and friends in header file <err.h> are the canonical 4.4 BSD interface for
6465 doing the same thing.
6467 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
6468 POSIX.2 `glob' function to do ~ and {...} expansion.
6470 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
6471 `clearenv' which is used in POSIX.9 is also available.
6473 * New function `getsid' returns session ID number on systems that support it.
6475 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
6476 files <db.h> and <mpool.h> provide a rich set of functions for several
6477 types of simple databases stored in memory and in files, and <ndbm.h> is
6478 an old `ndbm'-compatible interface using the `db' functions. Link with
6479 `-ldb' to get these functions.
6481 * New macro `strdupa' copies a string like `strdup', but uses local stack
6482 space from `alloca' instead of dynamic heap space from `malloc'.
6484 * New function `strnlen' is like `strlen' but searches only a given maximum
6485 number of characters for the null terminator. `stpncpy', `strndup' and
6486 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
6489 * New function `statfs' in header <sys/statfs.h>.
6491 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
6492 provide convenient functions for operating on blocks of null-terminated
6495 * A new suite of functions in <utmp.h> handle all the details of reading
6496 and writing the utmp file.
6498 * An implementation of the NIS/YP(tm) based NSS service was contributed by
6501 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
6502 completely POSIX compliant and also implemented the extended functionality
6503 to handle alternate digit representation and alternate era date formats.
6505 * Ulrich Drepper provided an implementation of the `strptime' function
6506 defined in XPG4.2 which transforms a string into a `struct tm' value.
6508 * Paul Eggert provided the tzselect shell script as part of the timezone
6509 code. The shell script makes it easy to select the correct timezone
6512 * The implementation of the malloc family of functions is completely replaced
6513 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
6514 The implementation uses the mmap function (if available) and it is
6515 optimized for the use in multi threaded programs.
6517 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
6518 functions. This new functionality is usable by specifying a special
6519 salt string and it is compatible with implementation on *BSD systems.
6521 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
6522 `getsubopt' to handle second level command line options, `bsd_signal'
6523 to access BSD style `signal' functionality, the obsolete `regexp' style
6526 * the `lchown' function is available on system which support this
6529 * The implementation of the shadow password handling function was contributed
6532 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
6534 * POSIX.1g support was added. The <sys/select.h> header is available,
6535 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
6536 implementation of `getaddrinfo'.
6540 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
6542 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
6543 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
6545 * The new function `daemon' from 4.4 BSD is useful for server programs that
6546 want to put themselves in the background.
6548 * Joel Sherrill has contributed support for several standalone boards that
6549 run without an operating system.
6551 * `printf', `scanf' and friends now accept a `q' type modifier for long
6552 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
6554 * All of the code taken from BSD (notably most of the math and networking
6555 routines) has been updated from the BSD 4.4-Lite release.
6557 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
6559 * The new functions `getdomainname' and `setdomainname' fetch or change the
6560 YP/NIS domain name. These are system calls which exist on systems which
6563 * The time zone data files have been updated for the latest international
6566 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
6567 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
6571 * The C library now includes support for Sun RPC, from Sun's free
6572 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
6573 are included. (There is still no support for YP.)
6575 * Tom Quinn has contributed a port of the C library to SGI machines running
6576 Irix 4 (mips-sgi-irix4).
6578 * The new `lockf' function is a simplified interface to the locking
6579 facilities of `fcntl', included for compatibility.
6581 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
6583 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
6585 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
6588 * The error message printed by `assert' for a failed assertion now includes
6589 the name of the program (if using GNU ld) and the name of the calling
6590 function (with versions of GCC that support this).
6592 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
6594 * The library now includes the <sys/mman.h> header file and memory
6595 management functions `mmap', `munmap', `mprotect', `msync', and
6596 `madvise', on systems that support those facilities.
6598 * The interface for `mcheck' has changed slightly: the function called to
6599 abort the program when an allocation inconsistency is detected now takes
6600 an argument that indicates the type of failure. The new function
6601 `mprobe' lets you request a consistency check for a particular block at
6602 any time (checks are normally done only when you call `free' or `realloc'
6605 * It is now possible to easily cross-compile the C library, building on one
6606 system a library to run on another machine and/or operating system. All
6607 you need to do is set the variable `HOST_CC' in `configparms' to the
6608 native compiler for programs to run on the machine you are building on (a
6609 few generator programs are used on Unix systems); set `CC' to the
6612 * The new function `fexecve' (only implemented on the GNU system) executes
6613 a program file given a file descriptor already open on the file.
6617 * Brendan Kehoe has contributed most of a port to the DEC Alpha
6618 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
6620 * You can set the variable `libprefix' in `configparms' to specify a prefix
6621 to be prepended to installed library files; this makes it easy to install
6622 the GNU C library to be linked as `-lgnuc' or whatever.
6624 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
6625 copies a limited number of characters from a string, and returns the
6626 address of the last character written.
6628 * You no longer need to check for whether the installed `stddef.h' is
6629 compatible with the GNU C library. configure now checks for you.
6631 * You can now define a per-stream `fileno' function to convert the
6632 stream's cookie into an integral file descriptor.
6634 * ``malloc (0)'' no longer returns a null pointer. Instead, it
6635 allocates zero bytes of storage, and returns a unique pointer which
6636 you can pass to `realloc' or `free'. The behavior is undefined if
6637 you dereference this pointer.
6639 * The C library now runs on Sony NEWS m68k machines running either
6640 NewsOS 3 or NewsOS 4.
6642 * The new `syscall' function is a system-dependent primitive function
6643 for invoking system calls. It has the canonical behavior on Unix
6644 systems, including unreliable return values for some calls (such as
6645 `pipe', `fork' and `getppid').
6647 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
6648 to `EAGAIN', which is the preferred name. On systems whose kernels
6649 use two distinct codes, the C library now translates EWOULDBLOCK to
6650 EAGAIN in every system call function.
6654 * The GNU C Library Reference Manual is now distributed with the library.
6655 `make dvi' will produce a DVI file of the printed manual.
6656 `make info' will produce Info files that you can read on line using C-h i
6657 in Emacs or the `info' program.
6658 Please send comments on the manual to bug-glibc-manual@gnu.org.
6660 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
6662 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
6664 * Jason Merrill has contributed a port to the Sequent Symmetry running
6665 Dynix version 3 (i386-sequent-dynix).
6667 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
6668 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
6670 * New function `memory_warnings' lets you arrange to get warnings when
6671 malloc is running out of memory to allocate, like Emacs gives you.
6673 * The C library now contains the relocating allocator used in Emacs 19 for
6674 its editing buffers. This allocator (ralloc) minimizes allocation
6675 overhead and fragmentation by moving allocated regions around whenever it
6676 needs to. You always refer to a ralloc'd region with a "handle" (a
6677 pointer to a pointer--an object of type `void **').
6679 * There is a new `printf' format: `%m' gives you the string corresponding
6680 to the error code in `errno'.
6682 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
6683 or `%[' conversion, but instead of filling in a fixed-sized buffer you
6684 pass, the `a' modifier says to fill in a `char **' you pass with a
6687 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
6688 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
6689 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
6691 * `mkstemp' is a traditional Unix function to atomically create and open a
6692 uniquely-named temporary file.
6696 * The standard location for the file that says what the local timezone is
6697 has changed again. It is now `/usr/local/etc/localtime' (or more
6698 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
6700 * The distribution no longer contains any files with names longer than 14
6703 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
6704 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
6706 * New functions `ttyslot' and `syslog' from 4.4 BSD.
6710 * The configuration process has changed quite a bit. The `configure'
6711 script is now used just like the configuration scripts for other GNU
6712 packages. The `sysdeps' directory hierarchy is much rearranged.
6713 The file `INSTALL' explains the new scheme in detail.
6715 * The header files no longer need to be processed into ANSI C and
6716 traditional C versions. There is just one set of files to install, and
6717 it will work with ANSI or old C compilers (including `gcc -traditional').
6719 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
6720 MIPS DECStation running Ultrix 4.
6722 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
6723 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
6724 made itself into a shared library.
6726 * Yet further improved support for the i386, running 4.3 BSD-like systems
6727 (such as Mach 3 with the Unix single-server), or System V.
6729 * New function `strncasecmp' to do case-insensitive string comparison
6730 with limited length.
6732 * New function `strsep' is a reentrant alternative to `strtok'.
6734 * New functions `scandir' and `alphasort' for searching directories.
6736 * New function `setenv' is a better interface to `putenv'.
6738 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
6739 function for traversing a directory tree.
6741 * The GNU obstack package is now also part of the C library.
6742 The new function `open_obstack_stream' creates a stdio stream that
6743 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
6744 formatted output directly to an obstack.
6746 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
6747 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
6749 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
6751 * The new functions `strfry' and `memfrob' do mysterious and wonderful
6752 things to your strings.
6754 * There are some new test programs: test-fseek, testmb, and testrand.
6756 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
6757 These ports are not finished, but are a good starting place for really
6758 supporting those systems.
6760 * `/etc/localtime' is now the standard location for the file that says what
6761 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
6762 This follows the general principle that `/etc' is the place for all local
6763 configuration files.
6765 * The C library header files now use `extern "C"' when used by the C++
6766 compiler, so the C library should now work with C++ code.
6768 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
6769 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
6772 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
6773 function which uses the `merge sort' algorithm, and is said to be
6774 significantly faster than the old GNU `qsort' function. Merge sort is
6775 now the standard `qsort' function. The new algorithm can require a lot
6776 of temporary storage; so, the old sorting function is called when the
6777 required storage is not available.
6779 * The C library now includes Michael Glad's Ultra Fast Crypt, which
6780 provides the Unix `crypt' function, plus some other entry points.
6782 * The code and header files taken from 4.4 BSD have been updated with the
6783 latest files released from Berkeley.
6785 ----------------------------------------------------------------------
6788 Permission is granted to anyone to make or distribute verbatim copies
6789 of this document as received, in any medium, provided that the
6790 copyright notice and this permission notice are preserved,
6791 thus giving the recipient permission to redistribute in turn.
6793 Permission is granted to distribute modified versions
6794 of this document, or of portions of it,
6795 under the above conditions, provided also that they
6796 carry prominent notices stating who last changed them.
6799 version-control: never