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 * Support for the C.UTF-8 locale has been added to glibc. The locale
13 supports full code-point sorting for all valid Unicode code points. A
14 limitation in the framework for fnmatch, regexec, and regcomp requires
15 a compromise to save space and only ASCII-based range expressions are
16 supported for now (see bug 28255). The full size of the locale is
17 only ~400KiB, with 346KiB coming from LC_CTYPE information for
18 Unicode. This locale harmonizes downstream C.UTF-8 already shipping
19 in various downstream distributions. The locale is not built into
20 glibc, and must be installed.
22 Deprecated and removed features, and other changes affecting compatibility:
24 [Add deprecations, removals and changes affecting compatibility here]
26 Changes to build and runtime requirements:
28 [Add changes to build and runtime requirements here]
30 Security related changes:
32 [Add security related changes here]
34 The following bugs are resolved with this release:
36 [The release manager will add the list generated by
37 scripts/list-fixed-bugs.py just before the release.]
44 * In order to support smoother in-place-upgrades and to simplify
45 the implementation of the runtime all functionality formerly
46 implemented in the libraries libpthread, libdl, libutil, libanl has
47 been integrated into libc. New applications do not need to link with
48 -lpthread, -ldl, -lutil, -lanl anymore. For backwards compatibility,
49 empty static archives libpthread.a, libdl.a, libutil.a, libanl.a are
50 provided, so that the linker options keep working. Applications which
51 have been linked against glibc 2.33 or earlier continue to load the
52 corresponding shared objects (which are now empty). The integration
53 of those libraries into libc means that additional symbols become
54 available by default. This can cause applications that contain weak
55 references to take unexpected code paths that would only have been
56 used in previous glibc versions when e.g. preloading libpthread.so.0,
57 potentially exposing application bugs.
59 * When _DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined,
60 PTHREAD_STACK_MIN is no longer constant and is redefined to
61 sysconf(_SC_THREAD_STACK_MIN). This supports dynamic sized register
62 sets for modern architectural features like Arm SVE.
64 * Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ. When _DYNAMIC_STACK_SIZE_SOURCE
65 or _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer
66 constant on Linux. MINSIGSTKSZ is redefined to sysconf(_SC_MINSIGSTKSZ)
67 and SIGSTKSZ is redefined to sysconf (_SC_SIGSTKSZ). This supports
68 dynamic sized register sets for modern architectural features like
71 * The dynamic linker implements the --list-diagnostics option, printing
72 a dump of information related to IFUNC resolver operation and
73 glibc-hwcaps subdirectory selection.
75 * On Linux, the function execveat has been added. It operates similar to
76 execve and it is is already used to implement fexecve without requiring
77 /proc to be mounted. However, different than fexecve, if the syscall is not
78 supported by the kernel an error is returned instead of trying a fallback.
80 * The ISO C2X function timespec_getres has been added.
82 * The feature test macro __STDC_WANT_IEC_60559_EXT__, from draft ISO
83 C2X, is supported to enable declarations of functions defined in Annex F
84 of C2X. Those declarations are also enabled when
85 __STDC_WANT_IEC_60559_BFP_EXT__, as specified in TS 18661-1, is
86 defined, and when _GNU_SOURCE is defined.
88 * On powerpc64*, glibc can now be compiled without scv support using the
89 --disable-scv configure option.
91 * Add support for 64-bit time_t on configurations like x86 where time_t
92 is traditionally 32-bit. Although time_t still defaults to 32-bit on
93 these configurations, this default may change in future versions.
94 This is enabled with the _TIME_BITS preprocessor macro set to 64 and is
95 only supported when LFS (_FILE_OFFSET_BITS=64) is also enabled. It is
96 only enabled for Linux and the full support requires a minimum kernel
99 * The main gconv-modules file in glibc now contains only a small set of
100 essential converter modules and the rest have been moved into a supplementary
101 configuration file gconv-modules-extra.conf in the gconv-modules.d directory
102 in the same GCONV_PATH. Similarly, external converter modules directories
103 may have supplementary configuration files in a gconv-modules.d directory
104 with names ending with .conf to logically classify the converter modules in
107 * On Linux, a new tunable, glibc.pthread.stack_cache_size, can be used
108 to configure the size of the thread stack cache.
110 * The function _Fork has been added as an async-signal-safe fork replacement
111 since Austin Group issue 62 droped the async-signal-safe requirement for
112 fork (and it will be included in the future POSIX standard). The new _Fork
113 function does not run any atfork function neither resets any internal state
114 or lock (such as the malloc one), and only sets up a minimal state required
115 to call async-signal-safe functions (such as raise or execve). This function
116 is currently a GNU extension.
118 * On Linux, the close_range function has been added. It allows efficiently
119 closing a range of file descriptors on recent kernels (version 5.9).
121 * The function closefrom has been added. It closes all file descriptors
122 greater than or equal to a given integer. This function is a GNU extension,
123 although it is also present in other systems.
125 * The posix_spawn_file_actions_addclosefrom_np function has been added,
126 enabling posix_spawn and posix_spawnp to close all file descriptors greater
127 than or equal to a given integer. This function is a GNU extension,
128 although Solaris also provides a similar function.
130 Deprecated and removed features, and other changes affecting compatibility:
132 * The function pthread_mutex_consistent_np has been deprecated; programs
133 should use the equivalent standard function pthread_mutex_consistent
136 * The function pthread_mutexattr_getrobust_np has been deprecated;
137 programs should use the equivalent standard function
138 pthread_mutexattr_getrobust instead.
140 * The function pthread_mutexattr_setrobust_np has been deprecated;
141 programs should use the equivalent standard function
142 pthread_mutexattr_setrobust instead.
144 * The function pthread_yield has been deprecated; programs should use
145 the equivalent standard function sched_yield instead.
147 * The function inet_neta declared in <arpa/inet.h> has been deprecated.
149 * Various rarely-used functions declared in <resolv.h> and
150 <arpa/nameser.h> have been deprecated. Applications are encouraged to
151 use dedicated DNS processing libraries if applicable. For <resolv.h>,
152 this affects the functions dn_count_labels, fp_nquery, fp_query,
153 fp_resstat, hostalias, loc_aton, loc_ntoa, p_cdname, p_cdnname,
154 p_class, p_fqname, p_fqnname, p_option, p_query, p_rcode, p_time,
155 p_type, putlong, putshort, res_hostalias, res_isourserver,
156 res_nameinquery, res_queriesmatch, res_randomid, sym_ntop, sym_ntos,
157 sym_ston. For <arpa/nameser.h>, the functions ns_datetosecs,
158 ns_format_ttl, ns_makecanon, ns_parse_ttl, ns_samedomain, ns_samename,
159 ns_sprintrr, ns_sprintrrf, ns_subdomain have been deprecated.
161 * Various symbols previously defined in libresolv have been moved to libc
162 in order to prepare for libresolv moving entirely into libc (see earlier
163 entry for merging libraries into libc). The symbols __dn_comp,
164 __dn_expand, __dn_skipname, __res_dnok, __res_hnok, __res_mailok,
165 __res_mkquery, __res_nmkquery, __res_nquery, __res_nquerydomain,
166 __res_nsearch, __res_nsend, __res_ownok, __res_query, __res_querydomain,
167 __res_search, __res_send formerly in libresolv have been renamed and no
168 longer have a __ prefix. They are now available in libc.
170 * The pthread cancellation handler is now installed with SA_RESTART and
171 pthread_cancel will always send the internal SIGCANCEL on a cancellation
172 request. It should not be visible to applications since the cancellation
173 handler should either act upon cancellation (if asynchronous cancellation
174 is enabled) or ignore the cancellation internal signal. However there are
175 buggy kernel interfaces (for instance some CIFS versions) that could still
176 see a spurious EINTR error when cancellation interrupts a blocking syscall.
178 * Previously, glibc installed its various shared objects under versioned
179 file names such as libc-2.33.so. The ABI sonames (e.g., libc.so.6)
180 were provided as symbolic links. Starting with glibc 2.34, the shared
181 objects are installed under their ABI sonames directly, without
182 symbolic links. This increases compatibility with distribution
183 package managers that delete removed files late during the package
184 upgrade or downgrade process.
186 * The symbols mallwatch and tr_break are now deprecated and no longer used in
187 mtrace. Similar functionality can be achieved by using conditional
188 breakpoints within mtrace functions from within gdb.
190 * The __morecore and __after_morecore_hook malloc hooks and the default
191 implementation __default_morecore have been removed from the API. Existing
192 applications will continue to link against these symbols but the interfaces
193 no longer have any effect on malloc.
195 * Debugging features in malloc such as the MALLOC_CHECK_ environment variable
196 (or the glibc.malloc.check tunable), mtrace() and mcheck() have now been
197 disabled by default in the main C library. Users looking to use these
198 features now need to preload a new debugging DSO libc_malloc_debug.so to get
199 this functionality back.
201 * The deprecated functions malloc_get_state and malloc_set_state have been
202 moved from the core C library into libc_malloc_debug.so. Legacy applications
203 that still use these functions will now need to preload libc_malloc_debug.so
204 in their environment using the LD_PRELOAD environment variable.
206 * The deprecated memory allocation hooks __malloc_hook, __realloc_hook,
207 __memalign_hook and __free_hook are now removed from the API. Compatibility
208 symbols are present to support legacy programs but new applications can no
209 longer link to these symbols. These hooks no longer have any effect on glibc
210 functionality. The malloc debugging DSO libc_malloc_debug.so currently
211 supports hooks and can be preloaded to get this functionality back for older
212 programs. However this is a transitional measure and may be removed in a
213 future release of the GNU C Library. Users may port away from these hooks by
214 writing and preloading their own malloc interposition library.
216 Changes to build and runtime requirements:
218 * On Linux, the shm_open, sem_open, and related functions now expect the
219 file shared memory file system to be mounted at /dev/shm. These functions
220 no longer search among the system's mount points for a suitable
221 replacement if /dev/shm is not available.
223 Security related changes:
225 CVE-2021-27645: The nameserver caching daemon (nscd), when processing
226 a request for netgroup lookup, may crash due to a double-free,
227 potentially resulting in degraded service or Denial of Service on the
228 local system. Reported by Chris Schanzle.
230 CVE-2021-33574: The mq_notify function has a potential use-after-free
231 issue when using a notification type of SIGEV_THREAD and a thread
232 attribute with a non-default affinity mask.
234 CVE-2021-35942: The wordexp function may overflow the positional
235 parameter number when processing the expansion resulting in a crash.
236 Reported by Philippe Antoine.
238 The following bugs are resolved with this release:
240 [4737] libc: fork is not async-signal-safe
241 [5781] math: Slow dbl-64 sin/cos/sincos for special values
242 [10353] libc: Methods for deleting all file descriptors greater than
243 given integer (closefrom)
244 [14185] glob: fnmatch() fails when '*' wildcard is applied on the file
245 name containing multi-byte character(s)
246 [14469] math: Inaccurate j0f function
247 [14470] math: Inaccurate j1f function
248 [14471] math: Inaccurate y0f function
249 [14472] math: Inaccurate y1f function
250 [14744] nptl: kill -32 $pid or kill -33 $pid on a process cancels a
252 [15271] dynamic-link: dlmopen()ed shared library with LM_ID_NEWLM
253 crashes if it fails dlsym() twice
254 [15648] nptl: multiple definition of `__lll_lock_wait_private'
255 [16063] nptl: Provide a pthread_once variant in libc directly
256 [17144] libc: syslog is not thread-safe if NO_SIGPIPE is not defined
257 [17145] libc: syslog with LOG_CONS leaks console file descriptor
258 [17183] manual: description of ENTRY struct in <search.h> in glibc
260 [18435] nptl: pthread_once hangs when init routine throws an exception
261 [18524] nptl: Missing calloc error checking in
262 __cxa_thread_atexit_impl
263 [19329] dynamic-link: dl-tls.c assert failure at concurrent
264 pthread_create and dlopen
265 [19366] nptl: returning from a thread should disable cancellation
266 [19511] nptl: 8MB memory leak in pthread_create in case of failure
267 when non-root user changes priority
268 [20802] dynamic-link: getauxval NULL pointer dereference after static
270 [20813] nptl: pthread_exit is inconsistent between libc and libpthread
271 [22057] malloc: malloc_usable_size is broken with mcheck
272 [22668] locale: LC_COLLATE: the last character of ellipsis is not
274 [23323] libc: [RFE] CSU startup hardening.
275 [23328] malloc: Remove malloc hooks and ensure related APIs return no
277 [23462] dynamic-link: Static binary with dynamic string tokens ($LIB,
278 $PLATFORM, $ORIGIN) crashes
279 [23489] libc: "gcc -lmcheck" aborts on free when using posix_memalign
280 [23554] nptl: pthread_getattr_np reports wrong stack size with
282 [24106] libc: Bash interpreter in ldd script is taken from host
283 [24773] dynamic-link: dlerror in an secondary namespace does not use
284 the right free implementation
285 [25036] localedata: Update collation order for Swedish
286 [25383] libc: where_is_shmfs/__shm_directory/SHM_GET_NAME may cause
287 shm_open to pick wrong directory
288 [25680] dynamic-link: ifuncmain9picstatic and ifuncmain9picstatic
289 crash in IFUNC resolver due to stack canary (--enable-stack-
291 [26874] build: -Warray-bounds in _IO_wdefault_doallocate
292 [26983] math: [x86_64] x86_64 tgamma has too large ULP error
293 [27111] dynamic-link: pthread_create and tls access use link_map
294 objects that may be concurrently freed by dlclose
295 [27132] malloc: memusagestat is linked to system librt, leading to
296 undefined symbols on major version upgrade
297 [27136] dynamic-link: dtv setup at thread creation may leave an entry
299 [27249] libc: libSegFault.so does not output signal number properly
300 [27304] nptl: pthread_cond_destroy does not pass private flag to futex
302 [27318] dynamic-link: glibc fails to load binaries when built with
303 -march=sandybridge: CPU ISA level is lower than required
304 [27343] nss: initgroups() SIGSEGVs when called on a system without
305 nsswich.conf (in a chroot)
306 [27346] dynamic-link: x86: PTWRITE feature check is missing
307 [27389] network: NSS chroot hardening causes regressions in chroot
309 [27403] dynamic-link: aarch64: tlsdesc htab is not freed on dlclose
310 [27444] libc: sysconf reports unsupported option (-1) for
311 _SC_LEVEL1_ICACHE_LINESIZE on X86 since v2.33
312 [27462] nscd: double-free in nscd (CVE-2021-27645)
313 [27468] malloc: aarch64: realloc crash with heap tagging: FAIL:
314 malloc/tst-malloc-thread-fail
315 [27498] dynamic-link: __dl_iterate_phdr lacks unwinding information
316 [27511] libc: S390 memmove assumes Vector Facility when MIE Facility 3
318 [27522] glob: glob, glob64 incorrectly marked as __THROW
319 [27555] dynamic-link: Static tests fail with --enable-stack-
321 [27559] libc: fstat(AT_FDCWD) succeeds (it shouldn't) and returns
322 information for the current directory
323 [27577] dynamic-link: elf/ld.so --help doesn't work
324 [27605] libc: tunables can't control xsave/xsavec selection in
326 [27623] libc: powerpc: Missing registers in sc[v] clobbers list
327 [27645] libc: [linux] sysconf(_SC_NPROCESSOR...) breaks down on
329 [27646] dynamic-link: Linker error for non-existing NSS symbols (e.g.
330 _nss_files_getcanonname_r) from within a dlmopen namespace.
331 [27648] libc: FAIL: misc/tst-select
332 [27650] stdio: vfscanf returns too early if a match is longer than
334 [27651] libc: Performance regression after updating to 2.33
335 [27655] string: Wrong size calculation in string/test-strnlen.c
336 [27706] libc: select fails to update timeout on error
337 [27709] libc: arm: FAIL: debug/tst-longjmp_chk2
338 [27721] dynamic-link: x86: ld_audit ignores bind now for TLSDESC and
339 tries resolving them lazily
340 [27744] nptl: Support different libpthread/ld.so load orders in
342 [27749] libc: Data race __run_exit_handlers
343 [27761] libc: getconf: Segmentation fault when passing '-vq' as
345 [27832] nss: makedb.c:797:7: error: 'writev' specified size 4294967295
346 exceeds maximum object size 2147483647
347 [27870] malloc: MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to
349 [27872] build: Obsolete configure option --enable-stackguard-
351 [27873] build: tst-cpu-features-cpuinfo fail when building on AMD cpu
352 [27882] localedata: Use U+00AF MACRON in more EBCDIC charsets
353 [27892] libc: powerpc: scv ABI error handling fails to check
355 [27896] nptl: mq_notify does not handle separately allocated thread
356 attributes (CVE-2021-33574)
357 [27901] libc: TEST_STACK_ALIGN doesn't work
358 [27902] libc: The x86-64 clone wrapper fails to align child stack
359 [27914] nptl: Install SIGSETXID handler with SA_ONSTACK
360 [27939] libc: aarch64: clone does not align the stack
361 [27968] libc: s390x: clone does not align the stack
362 [28011] libc: Wild read in wordexp (parse_param) (CVE-2021-35942)
363 [28024] string: s390(31bit): Wrong result of memchr (MEMCHR_Z900_G5)
365 [28028] malloc: malloc: tcache shutdown sequence does not work if the
366 thread never allocated anything
367 [28033] libc: Need to check RTM_ALWAYS_ABORT for RTM
368 [28064] string: x86_64:wcslen implementation list has wcsnlen
369 [28067] libc: FAIL: posix/tst-spawn5
370 [28068] malloc: FAIL: malloc/tst-mallocalign1-mcheck
371 [28071] time: clock_gettime, gettimeofday, time lost vDSO acceleration
373 [28075] nis: Out-of-bounds static buffer read in nis_local_domain
374 [28089] build: tst-tls20 fails when linker defaults to --as-needed
375 [28090] build: elf/tst-cpu-features-cpuinfo-static fails on certain
377 [28091] network: ns_name_skip may return 0 for domain names without
385 * The dynamic linker accepts the --list-tunables argument which prints
386 all the supported tunables. This option is disable if glibc is
387 configured with tunables disabled (--enable-tunables=no).
389 * The dynamic linker accepts the --argv0 argument and provides opportunity
390 to change argv[0] string.
392 * The dynamic linker loads optimized implementations of shared objects
393 from subdirectories under the glibc-hwcaps directory on the library
394 search path if the system's capabilities meet the requirements for
395 that subdirectory. Initially supported subdirectories include
396 "power9" and "power10" for the powerpc64le-linux-gnu architecture,
397 "z13", "z14", "z15" for s390x-linux-gnu, and "x86-64-v2", "x86-64-v3",
398 "x86-64-v4" for x86_64-linux-gnu. In the x86_64-linux-gnu case, the
399 subdirectory names correspond to the vendor-independent x86-64
400 microarchitecture levels defined in the x86-64 psABI supplement.
402 * The new --help option of the dynamic linker provides usage and
403 information and library search path diagnostics.
405 * The mallinfo2 function is added to report statistics as per mallinfo,
406 but with larger field widths to accurately report values that are
407 larger than fit in an integer.
409 * Add <sys/platform/x86.h> to provide query macros for x86 CPU features.
411 * Support for the RISC-V ISA running on Linux has been expanded to run on
412 32-bit hardware. This is supported for the following ISA and ABI pairs:
418 The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils
421 * A new fortification level _FORTIFY_SOURCE=3 is available. At this level,
422 glibc may use additional checks that may have an additional performance
423 overhead. At present these checks are available only on LLVM 9 and later.
424 The latest GCC available at this time (10.2) does not support this level of
427 Deprecated and removed features, and other changes affecting compatibility:
429 * The mallinfo function is marked deprecated. Callers should call
432 * When dlopen is used in statically linked programs, alternative library
433 implementations from HWCAP subdirectories are no longer loaded.
434 Instead, the default implementation is used.
436 * The deprecated <sys/vtimes.h> header and the function vtimes have been
437 removed. To support old binaries, the vtimes function continues to exist
438 as a compatibility symbol. Applications should use the getrlimit or
441 * Following a change in the tzdata 2018a release upstream, the zdump
442 program is now installed in the /usr/bin subdirectory. Previously,
443 the /usr/sbin subdirectory was used.
445 * On s390(x), the type float_t is now derived from the macro
446 __FLT_EVAL_METHOD__ that is defined by the compiler, instead of being
447 hardcoded to double. This does not affect the ABI of any libraries
448 that are part of the GNU C Library, but may affect the ABI of other
449 libraries that use this type in their interfaces. The new definition
450 improves consistency with compiler behavior in many scenarios.
452 * A future version of glibc will stop loading shared objects from the
453 "tls" subdirectories on the library search path, the subdirectory that
454 corresponds to the AT_PLATFORM system name, and also stop employing
455 the legacy AT_HWCAP search mechanism. Applications should switch to
456 the new glibc-hwcaps mechanism instead; if they do not do that, only
457 the baseline version (directly from the search path directory) will be
460 Changes to build and runtime requirements:
462 * On Linux, the system administrator needs to configure /dev/pts with
463 the intended access modes for pseudo-terminals. glibc no longer
464 attemps to adjust permissions of terminal devices. The previous glibc
465 defaults ("tty" group, user read/write and group write) already
466 corresponded to what most systems used, so that grantpt did not
467 perform any adjustments.
469 * On Linux, the posix_openpt and getpt functions no longer attempt to
470 use legacy (BSD) pseudo-terminals and assume that if /dev/ptmx exists
471 (and pseudo-terminals are supported), a devpts file system is mounted
472 on /dev/pts. Current systems already meet these requirements.
474 * s390x requires GCC 7.1 or newer. See gcc Bug 98269.
476 Security related changes:
478 CVE-2021-3326: An assertion failure during conversion from the
479 ISO-20220-JP-3 character set using the iconv function has been fixed.
480 This assertion was triggered by certain valid inputs in which the
481 converted output contains a combined sequence of two wide characters
482 crossing a buffer boundary. Reported by Tavis Ormandy.
484 CVE-2020-27618: An infinite loop has been fixed in the iconv program when
485 invoked with input containing redundant shift sequences in the IBM1364,
486 IBM1371, IBM1388, IBM1390, or IBM1399 character sets.
488 CVE-2020-29562: An assertion failure has been fixed in the iconv function
489 when invoked with UCS4 input containing an invalid character.
491 CVE-2019-25013: A buffer overflow has been fixed in the iconv function when
492 invoked with EUC-KR input containing invalid multibyte input sequences.
494 The following bugs are resolved with this release:
496 [10635] libc: realpath portability patches
497 [16124] dynamic-link: ld.so should allow to change argv[0]
498 [17924] malloc: 'free' should not set errno
499 [18683] libc: Linux faccessat implementation can incorrectly ignore
501 [22899] libc: Use 64-bit readdir() in generic POSIX getcwd()
502 [23091] hurd: missing waitid support
503 [23249] libc: Epyc and other current AMD CPUs do not select the
504 "haswell" platform subdirectory
505 [24080] dynamic-link: Definition of "haswell" platform is inconsistent
507 [24202] libc: m68k setjmp() saves incorrect 'a5' register in --enable-
509 [24941] libc: Make grantpt usable after multi-threaded fork in more
511 [24970] libc: realpath mishandles EOVERFLOW; stat not needed anyway
512 [24973] locale: iconv encounters segmentation fault when converting
513 0x00 0xfe in EUC-KR to UTF-8 (CVE-2019-25013)
514 [25399] string: undefined reference to `__warn_memset_zero_len' when
515 changing gnuc version
516 [25859] libc: glibc parser for /sys/devices/system/cpu/online is
518 [25938] dynamic-link: ld.so.cache should store meaning of hwcap mask
520 [25971] libc: s390 bits/hwcap.h out of sync with kernel
521 [26053] libc: unlockpt fails with ENOTTY for non-ptmx descriptors
522 [26100] libc: Race in syslog(3) with regards to tag printing.
523 [26124] libc: Export <cpu-features.h>
524 [26130] nscd: Inconsistent nscd cache during pruning
525 [26203] libc: GLRO(dl_x86_cpu_features) may not be intialized
526 [26224] locale: iconv hangs when converting some invalid inputs from
527 several IBM character sets (CVE-2020-27618)
528 [26341] libc: realpath cyclically call __alloca(path_max) to consume
530 [26343] manual: invalid documented return type for strerrorname_np(),
531 strerrordesc_np(), sigdescr_np(), sigabbrev_np()
532 [26376] libc: Namespace violation in stdio.h and sys/stat.h if build
534 [26383] locale: bind_textdomain_codeset doesn't accept //TRANSLIT
536 [26394] time: [2.33 Regression] FAIL: nptl/tst-join14
537 [26534] math: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on
539 [26552] dynamic-link: CPU_FEATURE_USABLE_P should be more conservative
540 [26553] libc: mtx_init allows type set to "mtx_recursive" only
541 [26555] string: strerrorname_np does not return the documented value
542 [26592] libc: pointer arithmetic overflows in realpath
543 [26600] network: Transaction ID collisions cause slow DNS lookups in
545 [26606] libc: [2.33 Regression] pselect is broken on x32
546 [26615] libc: powerpc: libc segfaults when LD_PRELOADed with libgcc
547 [26620] glob: fnmatch with collating symbols results in segmentation
549 [26625] libc: [2.33 Regression] CET is disabled
550 [26636] libc: 32-bit shmctl(IPC_INFO) crashes when shminfo struct is
551 at the end of a memory mapping
552 [26637] libc: semctl SEM_STAT_ANY fails to pass the buffer specified
553 by the caller to the kernel
554 [26639] libc: msgctl IPC_INFO and MSG_INFO return garbage
555 [26647] build: [-Werror=array-parameter=] due to different
556 declarations for __sigsetjmp
557 [26648] libc: mkstemp is likely to fail on systems with non-stricly-
559 [26649] stdio: printf should handle non-normal x86 long double numbers
560 gracefully (CVE-2020-29573)
561 [26686] build: -Warray-parameter instances building with GCC 11
562 [26687] build: -Warray-bounds instances building with GCC 11
563 [26690] stdio: Aliasing violation in __vfscanf_internal
564 [26691] nptl: Use a minimum guard size of 64 KiB on aarch64
565 [26726] build: GCC warning calling new_composite_name with an array of
567 [26736] libc: FAIL: misc/tst-sysvshm-linux
568 [26737] libc: Random FAIL: rt/tst-shm
569 [26791] libc: Missing O_CLOEXEC in sysconf.c
570 [26798] dynamic-link: aarch64: variant PCS symbols may be incorrectly
572 [26801] nptl: pthread_mutex_clocklock with CLOCK_MONOTONIC can fail on
574 [26818] string: aarch64: string tests may run ifunc variants that are
576 [26821] libc: Memory leak test failures on Fedora 33
577 [26824] libc: FAIL: elf/tst-cpu-features-supports with recent trunk:
578 FSGSBASE/LM/RDRAND check failure
579 [26833] time: adjtime() with delta == NULL segfaults on armv7 32bit
581 [26853] libc: aarch64: Missing unwind information in statically linked
583 [26923] locale: Assertion failure in iconv when converting invalid
584 UCS4 (CVE-2020-29562)
585 [26926] dynamic-link: aarch64: library dependencies are not bti
587 [26932] libc: sh: Multiple floating point functions defined as stubs
589 [26964] nptl: pthread_mutex_timedlock returning EAGAIN after futex is
591 [26988] dynamic-link: aarch64: BTI mprotect address is not page
593 [27002] build: libc_freeres_fn build failure with GCC 11
594 [27004] dynamic-link: ld.so is miscompiled by GCC 11
595 [27008] dynamic-link: ld.so.cache should have endianness markup
596 [27042] libc: [alpha] anonymous union in struct stat confuses
598 [27053] libc: Conformance regression in system(3) (and probably also
600 [27072] dynamic-link: static pie ifunc resolvers run before hwcap is
602 [27077] network: Do not reload /etc/nsswitch.conf from chroot
603 [27083] libc: Unsafe unbounded alloca in addmntent
604 [27104] dynamic-link: The COMMON_CPUID_INDEX_MAX handshake does not
606 [27130] string: "rep movsb" performance issue
607 [27150] libc: alpha: wait4() is unavailable in static linking
608 [27177] dynamic-link:
609 GLIBC_TUNABLES=glibc.cpu.x86_ibt=on:glibc.cpu.x86_shstk=on doesn't
611 [27222] dynamic-link: Incorrect sysdeps/x86/tst-cpu-features-cpuinfo.c
612 [27237] malloc: deadlock in malloc/tst-malloc-stats-cancellation
613 [27256] locale: Assertion failure in ISO-2022-JP-3 gconv module
614 related to combining characters (CVE-2021-3326)
621 * Unicode 13.0.0 Support: Character encoding, character type info, and
622 transliteration tables are all updated to Unicode 13.0.0, using
623 generator scripts contributed by Mike FABIAN (Red Hat).
625 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
627 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
628 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
629 Three ABIs are supported:
635 The arc* ABIs are little-endian while arceb is big-endian. All ABIs use
636 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
638 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
639 DT_DEPAUDIT dynamic section entries of the main executable.
641 * powerpc64le supports IEEE128 long double libm/libc redirects when
642 using -mabi=ieeelongdouble to compile C code on supported GCC
643 toolchains. It is recommended to use GCC 8 or newer when testing
646 * To help detect buffer overflows and other out-of-bounds accesses
647 several APIs have been annotated with GCC 'access' attribute. This
648 should help GCC 10 issue better warnings.
650 * On Linux, functions pthread_attr_setsigmask_np and
651 pthread_attr_getsigmask_np have been added. They allow applications
652 to specify the signal mask of a thread created with pthread_create.
654 * The GNU C Library now provides the header file <sys/single_threaded.h>
655 which declares the variable __libc_single_threaded. Applications are
656 encouraged to use this variable for single-thread optimizations,
657 instead of weak references to symbols historically defined in
660 * The functions sigabbrev_np and sigdescr_np have been added. The
661 sigabbrev_np function returns the abbreviated signal name (e.g. "HUP" for
662 SIGHUP) while sigdescr_np returns a string describing the signal number
663 (e.g "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
664 attempt to translate the return description, both functions return
665 NULL for an invalid signal number.
667 They should be used instead of sys_siglist or sys_sigabbrev and they
668 are both thread and async-signal safe. These functions are GNU extensions.
670 * The functions strerrorname_np and strerrordesc_np have been added. The
671 strerroname_np function returns error number name (e.g. "EINVAL" for EINVAL)
672 while strerrordesc_np returns a string describing the error number
673 (e.g "Invalid argument" for EINVAL). Different than strerror,
674 strerrordesc_np does not attempt to translate the return description, both
675 functions return NULL for an invalid error number.
677 They should be used instead of sys_errlist and sys_nerr, both are
678 thread and async-signal safe. These functions are GNU extensions.
680 * AArch64 now supports standard branch protection security hardening
681 in glibc when it is built with a GCC that is configured with
682 --enable-standard-branch-protection (or if -mbranch-protection=standard
683 flag is passed when building both GCC target libraries and glibc,
684 in either case a custom GCC is needed). This includes branch target
685 identification (BTI) and pointer authentication for return addresses
686 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
687 extensions respectively for the protection to be effective,
688 otherwise the used instructions are nops. User code can use PAC-RET
689 without libc support, but BTI requires a libc that is built with BTI
690 support, otherwise runtime objects linked into user code will not be
693 Deprecated and removed features, and other changes affecting compatibility:
695 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
696 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
697 RPC header files. Backward compatibility for old programs is kept
698 only for architectures and ABIs that have been added in or before
699 glibc 2.31. New programs need to use TI-RPC
700 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
701 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
703 * Remove configure option --enable-obsolete-nsl. libnsl is only built
704 as shared library for backward compatibility and the NSS modules "nis"
705 and "nisplus" are not built at all and libnsl's headers aren't
706 installed. This compatibility is kept only for architectures and ABIs
707 that have been added in or before version 2.28. Replacement
708 implementations based on TI-RPC, which additionally support IPv6, are
709 available from <https://github.com/thkukuk/>. This change does not
710 affect the "compat" NSS module, which does not depend on libnsl
711 since 2.27 and thus can be used without NIS.
713 * The deprecated <sys/sysctl.h> header and the sysctl function have been
714 removed. To support old binaries, the sysctl function continues to
715 exist as a compatibility symbol (on those architectures which had it),
716 but always fails with ENOSYS. This reflects the removal of the system
717 call from all architectures, starting with Linux 5.5.
719 * The sstk function is no longer available to newly linked binaries.
720 Its implementation always returned with a failure, and the function
721 was not declared in any header file.
723 * The legacy signal handling functions siginterrupt, sigpause, sighold,
724 sigrelse, sigignore and sigset, and the sigmask macro have been
725 deprecated. Applications should use the sigsuspend, sigprocmask and
726 sigaction functions instead.
728 * ldconfig now defaults to the new format for ld.so.cache. glibc has
729 already supported this format for almost 20 years.
731 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
732 are no longer available to newly linked binaries, and their declarations
733 have been removed from <string.h>. They are exported solely as
734 compatibility symbols to support old binaries. All programs should use
737 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
738 are no longer available to newly linked binaries, and their declarations
739 have been removed from <stdio.h>. They are exported solely as
740 compatibility symbols to support old binaries. All programs should use
741 strerror or strerror_r instead.
743 * Both strerror and strerror_l now share the same internal buffer in the
744 calling thread, meaning that the returned string pointer may be invalided
745 or contents might be overwritten on subsequent calls in the same thread or
746 if the thread is terminated. It makes strerror MT-safe.
748 * Using weak references to libpthread functions such as pthread_create
749 or pthread_key_create to detect the singled-threaded nature of a
750 program is an obsolescent feature. Future versions of glibc will
751 define pthread_create within libc.so.6 itself, so such checks will
752 always flag the program as multi-threaded. Applications should check
753 the __libc_single_threaded variable declared in
754 <sys/single_threaded.h> instead.
756 * The "files" NSS module no longer supports the "key" database (used for
757 secure RPC). The contents of the /etc/publickey file will be ignored,
758 regardless of the settings in /etc/nsswitch.conf. (This method of
759 storing RPC keys only supported the obsolete and insecure AUTH_DES
760 flavor of secure RPC.)
762 * The __morecore and __after_morecore_hook malloc hooks and the default
763 implementation __default_morecore have been deprecated. Applications
764 should use malloc interposition to change malloc behavior, and mmap to
765 allocate anonymous memory. A future version of glibc may require that
766 applications which use the malloc hooks must preload a special shared
767 object, to enable the hooks.
769 * The hesiod NSS module has been deprecated and will be removed in a
770 future version of glibc. System administrators are encouraged to
771 switch to other approaches for networked account databases, such as
774 Changes to build and runtime requirements:
776 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
777 long double redirects.
779 Security related changes:
781 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
782 invoked with the -c option and when processing invalid multi-byte input
783 sequences. Reported by Jan Engelhardt.
785 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
786 corruption when they were passed a pseudo-zero argument. Reported by Guido
787 Vranken / ForAllSecure Mayhem.
789 CVE-2020-1752: A use-after-free vulnerability in the glob function when
790 expanding ~user has been fixed.
792 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
793 memmove functions has been fixed. Discovered by Jason Royes and Samual
794 Dytrych of the Cisco Security Assessment and Penetration Team (See
797 The following bugs are resolved with this release:
799 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
800 [10441] manual: Backtraces code example lacks error checking
801 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
802 timer_sigev_thread dangerous
803 [14231] stdio: stdio-common tests memory requirements
804 [14578] libc: /proc-based emulation for lchmod, fchmodat
805 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
806 filtee has constructor
807 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
808 sequences (CVE-2016-10228)
809 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
810 character entities for infinity & pi
811 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
812 segfaults in applications
813 [20543] libc: Please move from .gnu.linkonce to comdat
814 [22489] network: gcc warns about implicit convertion in
815 ICMP6_FILTER_SETPASS with -Wsign-conversion
816 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
817 [23294] math: Complex _FloatN functions are redirected to the wrong
818 function with -mlong-double-64
819 [23296] libc: Data race in setting function descriptor during lazy
821 [23668] dynamic-link: ldconfig: Default to the new format for
823 [23819] hurd: hurd: Add C11 thread support
824 [23990] build: test-container error out on failure to exec child.
825 [23991] build: shell-container typo in run_command_array
826 [24638] manual: Error in example of parsing a template string
827 [24654] manual: Wrong declaration of wcschr in libc manual
828 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
830 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
831 dynamically loaded dsos
832 [25098] nptl: nptl: ctype classification functions are not AS-Safe
833 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
835 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
836 restore EAX, ECX and EDX
837 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
838 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
839 [25420] network: Race condition in resolv_conf.c can result in caching
840 stale configuration forever
841 [25487] math: sinl() stack corruption from crafted input
843 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
845 [25523] libc: MIPS/Linux inline syscall template is miscompiled
846 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
848 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
849 on 32 bit and old kernel
850 [25635] libc: arm: Wrong sysdep order selection for soft-fp
851 [25639] localedata: Some names of days and months wrongly spelt in
853 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
854 amount of sigset_t bytes
855 [25691] stdio: printf: memory leak when printing long multibyte
857 [25715] libc: system() returns wrong errors when posix_spawn fails
858 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
859 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
860 state for conversions that produce two Unicode code points
861 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
862 for linux x86_64 leads to livelock
863 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
864 test failures, invalid instruction in ld.so
865 [25790] glob: Typo in tst-fnmatch.input
866 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
868 [25819] localedata: Update locale data to Unicode 13.0.0
869 [25824] libc: Abnormal function of strnlen in aarch64
870 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
871 [25896] libc: Incorrect prctl
872 [25902] libc: Bad LOADARGS_N
873 [25905] dynamic-link: VSX registers are corrupted during PLT
874 resolution when glibc is built with --disable-multi-arch and --with-
876 [25933] string: Off by one error in __strncmp_avx2 when
877 length=VEC_SIZE*4 and strings are at page boundaries can cause a
879 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
880 exiting detached thread
881 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
883 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
885 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
886 [26073] math: getpayload() has wrong return value
887 [26076] dynamic-link: dlmopen crashes after failing to load
888 dependencies in audit mode
889 [26120] localedata: column width of of some Korean
890 JUNGSEONG/JONGSEONG characters wrong (should be 0)
891 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
892 [26133] libc: Incorrect need_arch_feature_F16C
893 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
895 [26149] libc: PKU is usable only if OSPKE is set
896 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
898 [26208] libc: Incorrect bit_cpu_CLFSH
899 [26210] network: Incorrect use of hidden symbols for global sunrpc
901 [26211] stdio: printf integer overflow calculating allocation size
902 [26214] stdio: printf_fp double free
903 [26215] stdio: printf_fp memory leak
904 [26232] time: FAIL: support/tst-timespec for 32-bit targets
905 [26258] nss: nss_compat should not read input files with mmap
906 [26332] string: Incorrect cache line size load causes memory
914 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
915 enable features from the draft ISO C2X standard. Only some features from
916 this draft standard are supported by the GNU C Library, and as the draft
917 is under active development, the set of features enabled by this macro is
918 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
919 by compiling with "gcc -std=gnu2x".
921 * The <math.h> functions that round their results to a narrower type now
922 have corresponding type-generic macros in <tgmath.h>, as defined in TS
923 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
924 Clarification Request 13 to TS 18661-3.
926 * The function pthread_clockjoin_np has been added, enabling join with a
927 terminated thread with a specific clock. It allows waiting against
928 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
930 * New locale added: mnw_MM (Mon language spoken in Myanmar).
932 * The DNS stub resolver will optionally send the AD (authenticated data) bit
933 in queries if the trust-ad option is set via the options directive in
934 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
935 mode, the AD bit, as provided by the name server, is available to
936 applications which call res_search and related functions. In the default
937 mode, the AD bit is not set in queries, and it is automatically cleared in
938 responses, indicating a lack of DNSSEC validation. (Therefore, the name
939 servers and the network path to them are treated as untrusted.)
941 Deprecated and removed features, and other changes affecting compatibility:
943 * The totalorder and totalordermag functions, and the corresponding
944 functions for other floating-point types, now take pointer arguments to
945 avoid signaling NaNs possibly being converted to quiet NaNs in argument
946 passing. This is in accordance with the resolution of Clarification
947 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
948 floating-point arguments directly will continue to work.
950 * The obsolete function stime is no longer available to newly linked
951 binaries, and its declaration has been removed from <time.h>.
952 Programs that set the system time should use clock_settime instead.
954 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
955 in a future version of glibc. In this release, the header still exists
956 but calling ftime will cause a compiler warning. All programs should use
957 gettimeofday or clock_gettime instead.
959 * The gettimeofday function no longer reports information about a
960 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
961 many years, as it cannot handle the full complexity of the world's
962 timezones, but hitherto we have supported it on a best-effort basis.
963 Changes required to support 64-bit time_t on 32-bit architectures have
964 made this no longer practical.
966 As of this release, callers of gettimeofday with a non-null 'tzp' argument
967 should expect to receive a 'struct timezone' whose tz_minuteswest and
968 tz_dsttime fields are zero. (For efficiency reasons, this does not always
969 happen on a few Linux-based ports. This will be corrected in a future
972 All callers should supply a null pointer for the 'tzp' argument to
973 gettimeofday. For accurate information about the time zone associated
974 with the current time, use the localtime function.
976 gettimeofday itself is obsolescent according to POSIX. We have no plans
977 to remove access to this function, but portable programs should consider
978 using clock_gettime instead.
980 * The settimeofday function can still be used to set a system-wide time
981 zone when the operating system supports it. This is because the Linux
982 kernel reused the API, on some architectures, to describe a system-wide
983 time-zone-like offset between the software clock maintained by the kernel,
984 and the "RTC" clock that keeps time when the system is shut down.
986 However, to reduce the odds of this offset being set by accident,
987 settimeofday can no longer be used to set the time and the offset
988 simultaneously. If both of its two arguments are non-null, the call
989 will fail (setting errno to EINVAL).
991 Callers attempting to set this offset should also be prepared for the call
992 to fail and set errno to ENOSYS; this already happens on the Hurd and on
993 some Linux architectures. The Linux kernel maintainers are discussing a
994 more principled replacement for the reused API. After a replacement
995 becomes available, we will change settimeofday to fail with ENOSYS on all
996 platforms when its 'tzp' argument is not a null pointer.
998 settimeofday itself is obsolescent according to POSIX. Programs that set
999 the system time should use clock_settime and/or the adjtime family of
1000 functions instead. We may cease to make settimeofday available to newly
1001 linked binaries after there is a replacement for Linux's time-zone-like
1004 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
1005 the optional CAS instruction is implemented (for instance, LEON processors
1006 are still supported, but SuperSPARC processors are not).
1008 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
1011 * If a lazy binding failure happens during dlopen, during the execution of
1012 an ELF constructor, the process is now terminated. Previously, the
1013 dynamic loader would return NULL from dlopen, with the lazy binding error
1014 captured in a dlerror message. In general, this is unsafe because
1015 resetting the stack in an arbitrary function call is not possible.
1017 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
1018 executable stack unless explicitly configured at build time to require
1019 minimum kernel version 4.8 or newer. This is because executing
1020 floating-point branches on a non-executable stack on Linux kernels prior to
1021 4.8 can lead to application crashes for some MIPS configurations. While
1022 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
1023 expected to enable non-executable stack by default with PT_GNU_STACK by
1024 default and is thus likely to trigger a crash on older kernels.
1026 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
1027 non-executable stack while dropping support for older kernels.
1029 * System call wrappers for time system calls now use the new time64 system
1030 calls when available. On 32-bit targets, these wrappers attempt to call
1031 the new system calls first and fall back to the older 32-bit time system
1032 calls if they are not present. This may cause issues in environments
1033 that cannot handle unsupported system calls gracefully by returning
1034 -ENOSYS. Seccomp sandboxes are affected by this issue.
1036 Changes to build and runtime requirements:
1038 * It is no longer necessary to have recent Linux kernel headers to build
1039 working (non-stub) system call wrappers on all architectures except 64-bit
1040 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
1042 * The ChangeLog file is no longer present in the toplevel directory of the
1043 source tree. ChangeLog files are located in the ChangeLog.old directory as
1044 ChangeLog.N where the highest N has the latest entries.
1046 Security related changes:
1048 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
1049 out-of-bounds write when executed in a signal frame context.
1051 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
1052 environment variable during program execution after a security
1053 transition, allowing local attackers to restrict the possible mapping
1054 addresses for loaded libraries and thus bypass ASLR for a setuid
1055 program. Reported by Marcin Kościelnicki.
1057 The following bugs are resolved with this release:
1059 [12031] localedata: iconv -t ascii//translit with Greek characters
1060 [15813] libc: Multiple issues in __gen_tempname
1061 [17726] libc: [arm, sparc] profil_counter should be compat symbol
1062 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
1063 [19767] libc: vdso is not used with static linking
1064 [19903] hurd: Shared mappings not being inherited by children processes
1065 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
1066 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
1068 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
1069 Symbols-A/B Unicode blocks
1070 [23518] libc: Eliminate __libc_utmp_jump_table
1071 [24026] malloc: malloc_info() returns wrong numbers
1072 [24054] localedata: Many locales are missing date_fmt
1073 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
1074 [24304] dynamic-link: Lazy binding failure during ELF
1075 constructors/destructors is not fatal
1076 [24376] libc: RISC-V symbol size confusion with _start
1077 [24682] localedata: zh_CN first weekday should be Monday per GB/T
1079 [24824] libc: test-in-container does not install charmap files compatible
1081 [24844] regex: regex bad pointer / leakage if malloc fails
1082 [24867] malloc: Unintended malloc_info formatting changes
1083 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
1084 [24880] libc: login: utmp implementation uses struct flock with fcntl64
1085 [24882] libc: login: pututline uses potentially outdated cache
1086 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
1087 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
1089 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
1091 [24930] dynamic-link: dlopen of PIE executable can result in
1092 _dl_allocate_tls_init assertion failure
1093 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
1094 (stringop-overflow error)
1095 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
1096 functions other can lead to crashes
1097 [24967] libc: jemalloc static linking causes runtime failure
1098 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
1100 [25035] libc: sbrk() failure handled poorly in tunables_strdup
1101 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
1102 [25097] libc: new -Warray-bounds with GCC 10
1103 [25112] dynamic-link: dlopen must not make new objects accessible when it
1104 still can fail with an error
1105 [25139] localedata: Please add the new mnw_MM locale
1106 [25149] regex: Array bounds violation in proceed_next_node
1107 [25157] dynamic-link: Audit cookie for the dynamic loader is not
1108 initialized correctly
1109 [25189] libc: glibc's __glibc_has_include causes issues with clang
1111 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
1112 value to an unsigned
1113 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
1114 binaries (CVE-2019-19126)
1115 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
1117 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
1119 [25232] string: <string.h> does not enable const correctness for strchr et
1121 [25233] localedata: Consider "." as the thousands separator for sl_SI
1123 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
1124 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
1125 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
1127 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
1128 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
1130 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
1131 (dl_initfirst) link map pointer
1132 [25401] malloc: pvalloc must not have __attribute_alloc_size__
1133 [25423] libc: Array overflow in backtrace on powerpc
1134 [25425] network: Missing call to __resolv_context_put in
1135 getaddrinfo.c:gethosts
1142 * Unicode 12.1.0 Support: Character encoding, character type info, and
1143 transliteration tables are all updated to Unicode 12.1.0, using
1144 generator scripts contributed by Mike FABIAN (Red Hat).
1146 * The dynamic linker accepts the --preload argument to preload shared
1147 objects, in addition to the LD_PRELOAD environment variable.
1149 * The twalk_r function has been added. It is similar to the existing
1150 twalk function, but it passes an additional caller-supplied argument
1151 to the callback function.
1153 * On Linux, the getdents64, gettid, and tgkill functions have been added.
1155 * Minguo (Republic of China) calendar support has been added as an
1156 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
1159 * The entry for the new Japanese era has been added for ja_JP locale.
1161 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
1162 pvalloc, memalign, and posix_memalign fail now with total object size
1163 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
1164 pointer subtraction within the allocated object, where results might
1165 overflow the ptrdiff_t type.
1167 * The dynamic linker no longer refuses to load objects which reference
1168 versioned symbols whose implementation has moved to a different soname
1169 since the object has been linked. The old error message, symbol
1170 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
1171 link time reference, is gone.
1173 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
1174 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
1175 functions. These behave similarly to their "timed" equivalents, but also
1176 accept a clockid_t parameter to determine which clock their timeout should
1177 be measured against. All functions allow waiting against CLOCK_MONOTONIC
1178 and CLOCK_REALTIME. The decision of which clock to be used is made at the
1179 time of the wait (unlike with pthread_condattr_setclock, which requires
1180 the clock choice at initialization time).
1182 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
1183 work, new resolvers can use a second argument which can be extended in
1184 the future, currently it contains the AT_HWCAP2 value.
1186 Deprecated and removed features, and other changes affecting compatibility:
1188 * The copy_file_range function fails with ENOSYS if the kernel does not
1189 support the system call of the same name. Previously, user space
1190 emulation was performed, but its behavior did not match the kernel
1191 behavior, which was deemed too confusing. Applications which use the
1192 copy_file_range function can no longer rely on glibc to provide a fallback
1193 on kernels that do not support the copy_file_range system call, and if
1194 this function returns ENOSYS, they will need to use their own fallback.
1195 Support for copy_file_range for most architectures was added in version
1196 4.5 of the mainline Linux kernel.
1198 * The functions clock_gettime, clock_getres, clock_settime,
1199 clock_getcpuclockid, clock_nanosleep were removed from the librt library
1200 for new applications (on architectures which had them). Instead, the
1201 definitions in libc will be used automatically, which have been available
1204 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
1205 and <sys/stropts.h> have been removed.
1207 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
1208 resolver flag (deprecated in glibc 2.25) have been removed.
1210 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
1211 resolver have been removed from <resolv.h>.
1213 * With --enable-bind-now, installed programs are now linked with the
1216 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
1217 configurations) has been removed, following the deprecation of this
1218 subarchitecture in version 8 of GCC, and its removal in version 9.
1220 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
1221 header have been removed.
1223 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
1224 deprecated and will be removed from a future version of glibc.
1225 Application should directly access /proc instead. For obtaining random
1226 bits, the getentropy function can be used.
1228 Changes to build and runtime requirements:
1230 * GCC 6.2 or later is required to build the GNU C Library.
1232 Older GCC versions and non-GNU compilers are still supported when
1233 compiling programs that use the GNU C Library.
1235 Security related changes:
1237 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
1238 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
1239 has undefined behavior. On x32, the size_t argument may be passed
1240 in the lower 32 bits of the 64-bit RDX register with non-zero upper
1241 32 bits. When it happened with the sign bit of RDX register set,
1242 memcmp gave the wrong result since it treated the size argument as
1243 zero. Reported by H.J. Lu.
1245 CVE-2019-9169: Attempted case-insensitive regular-expression match
1246 via proceed_next_node in posix/regexec.c leads to heap-based buffer
1247 over-read. Reported by Hongxu Chen.
1249 The following bugs are resolved with this release:
1251 [2872] locale: Transliteration Cyrillic -> ASCII fails
1252 [6399] libc: gettid() should have a wrapper
1253 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
1254 [16976] glob: fnmatch unbounded stack VLA for collating symbols
1255 [17396] localedata: globbing for locale by [[.collating-element.]]
1256 [18035] dynamic-link: pldd does no longer work, enters infinite loop
1257 [18465] malloc: memusagestat is built using system C library
1258 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
1259 invalid input drops valid char
1260 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
1261 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
1262 [21897] localedata: Afar locales: Fix mon, abmon, and abday
1263 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
1264 [23352] malloc: __malloc_check_init still defined in public header
1266 [23403] nptl: Wrong alignment of TLS variables
1267 [23501] libc: nftw() doesn't return dangling symlink's inode
1268 [23733] malloc: Check the count before calling tcache_get()
1269 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
1271 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
1272 [23844] nptl: pthread_rwlock_trywrlock results in hang
1273 [23983] argparse: Missing compat versions of argp_failure and argp_error
1274 for long double = double
1275 [23984] libc: Missing compat versions of err.h and error.h functions for
1276 long double = double
1277 [23996] localedata: Dutch salutations
1278 [24040] libc: riscv64: unterminated call chain in __thread_start
1279 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
1281 [24051] stdio: puts and putchar output to _IO_stdout instead of stdout
1282 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
1284 [24114] regex: regexec buffer read overrun in "grep -i
1285 '\(\(\)*.\)*\(\)\(\)\1'"
1286 [24122] libc: Segfaults if 0 returned from la_version
1287 [24153] stdio: Some input functions do not react to stdin assignment
1288 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
1289 RDX is set) (CVE-2019-7309)
1290 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
1291 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
1292 not the default "nor"
1293 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
1294 false positives, change to modern flexible array
1295 [24180] nptl: pthread_mutex_trylock does not use the correct order of
1296 instructions while maintaining the robust mutex list due to missing
1298 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
1299 unnecessary librt dependencies
1300 [24200] localedata: Revert first_weekday removal in en_IE locale
1301 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
1302 [24215] nptl: pthread_timedjoin_np should be a cancellation point
1303 [24216] malloc: Check for large bin list corruption when inserting
1305 [24228] stdio: old x86 applications that use legacy libio crash on exit
1306 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
1308 [24293] localedata: Missing Minguo calendar support for TW locales
1309 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
1310 tt_RU (Tatar) locale
1311 [24307] localedata: Update locale data to Unicode 12.0.0
1312 [24323] dynamic-link: dlopen should not be able open PIE objects
1313 [24335] build: "Obsolete types detected" with Linux 5.0 headers
1314 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
1315 tt_RU (Tatar) locale
1316 [24370] localedata: Add lang_name for tt_RU locale
1317 [24372] locale: Binary locale files are not architecture independent
1318 [24394] time: strptime %Ey mis-parses final year of era
1319 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
1321 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
1323 [24531] malloc: Malloc tunables give tcache assertion failures
1324 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
1326 [24535] localedata: Update locale data to Unicode 12.1.0
1327 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
1328 kernels and break testing
1329 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
1330 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
1331 [-Werror=format-overflow=]
1332 [24570] libc: alpha: compat msgctl uses __IPC_64
1333 [24584] locale: Data race in __wcsmbs_clone_conv
1334 [24588] stdio: Remove codecvt vtables from libio
1335 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
1337 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
1338 [24632] stdio: Old binaries which use freopen with default stdio handles
1340 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
1342 [24652] localedata: szl_PL spelling correction
1343 [24695] nss: nss_db: calling getpwent after endpwent crashes
1344 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
1345 in /etc/nsswitch.conf
1346 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
1347 [24740] libc: getdents64 type confusion
1348 [24741] dynamic-link: ld.so should not require that a versioned symbol is
1349 always implemented in the same library
1350 [24744] libc: Remove copy_file_range emulation
1351 [24757] malloc: memusagestat is linked against system libpthread
1352 [24794] libc: Partial test suite run builds corrupt test-in-container
1360 * The getcpu wrapper function has been added, which returns the currently
1361 used CPU and NUMA node. This function is Linux-specific.
1363 * A new convenience target has been added for distribution maintainers
1364 to build and install all locales as directories with files. The new
1365 target is run by issuing the following command in your build tree:
1366 'make localedata/install-locale-files', with an optional DESTDIR
1367 to set the install root if you wish to install into a non-default
1368 configured location.
1370 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
1372 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
1373 for _GNU_SOURCE, to match BSD environments.
1375 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
1376 indicates that it will abort the transaction prior to entering the kernel
1377 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
1378 suspended, and this caused some undefined side-effects issues by aborting
1379 transactions manually. Glibc avoided it by abort transactions manually on
1380 each syscall, but it lead to performance issues on newer kernels where the
1381 HTM state is saved and restore lazily (the state being saved even when the
1382 process actually does not use HTM).
1384 * The functions posix_spawn_file_actions_addchdir_np and
1385 posix_spawn_file_actions_addfchdir_np have been added, enabling
1386 posix_spawn and posix_spawnp to run the new process in a different
1387 directory. These functions are GNU extensions. The function
1388 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
1391 * The popen and system do not run atfork handlers anymore (BZ#17490).
1392 Although it is a possible POSIX violation, the POSIX rationale in
1393 pthread_atfork documentation regarding atfork handlers is to handle
1394 inconsistent mutex state after a fork call in a multi-threaded process.
1395 In both popen and system there is no direct access to user-defined mutexes.
1397 * Support for the C-SKY ABIV2 running on Linux has been added. This port
1398 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
1400 - C-SKY ABIV2 soft-float little-endian
1401 - C-SKY ABIV2 hard-float little-endian
1403 * strftime's default formatting of a locale's alternative year (%Ey)
1404 has been changed to zero-pad the year to a minimum of two digits,
1405 like "%y". This improves the display of Japanese era years during
1406 the first nine years of a new era, and is expected to be harmless
1407 for all other locales (only Japanese locales regularly have
1408 alternative year numbers less than 10). Zero-padding can be
1409 overridden with the '_' or '-' flags (which are GNU extensions).
1411 * As a GNU extension, the '_' and '-' flags can now be applied to
1412 "%EY" to control how the year number is formatted; they have the
1413 same effect that they would on "%Ey".
1415 Deprecated and removed features, and other changes affecting compatibility:
1417 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
1418 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
1420 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
1421 in <sys/procfs.h>, has been corrected to match the type actually used by
1422 the Linux kernel. This affects the size and layout of that structure on
1423 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
1425 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
1426 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
1427 defined in <sys/procfs.h>, has been corrected to match the type actually
1428 used by the Linux kernel. This affects the size and layout of those
1431 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
1432 meant to scan a string and allocate space for it with malloc, is now
1433 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
1434 defined. This extension conflicts with C99's use of '%a' to scan a
1435 hexadecimal floating-point number, which is now available to programs
1436 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
1438 POSIX.1-2008 includes the feature of allocating a buffer for string input
1439 with malloc, using the modifier letter 'm' instead. Programs using
1440 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
1441 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
1442 C99 '%a' no longer need to avoid _GNU_SOURCE.
1444 GCC's -Wformat warnings can detect most uses of this extension, as long
1445 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
1446 __attribute__ ((format (scanf, ...))).
1448 Changes to build and runtime requirements:
1450 * Python 3.4 or later is required to build the GNU C Library.
1452 * On most architectures, GCC 5 or later is required to build the GNU C
1453 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
1455 Older GCC versions and non-GNU compilers are still supported when
1456 compiling programs that use the GNU C Library.
1458 Security related changes:
1460 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
1461 denial of service due to resource exhaustion when processing getaddrinfo
1462 calls with crafted host names. Reported by Guido Vranken.
1464 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
1465 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
1466 happened, accessing the 32-bit size_t value as the full 64-bit register
1467 in the assembly string/memory functions would cause a buffer overflow.
1468 Reported by H.J. Lu.
1470 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
1471 addresses with arbitrary trailing characters, potentially leading to data
1472 or command injection issues in applications.
1474 The following bugs are resolved with this release:
1476 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
1477 [10496] localedata: 12h time representation in multiple locales faulty
1478 [10797] localedata: it_IT locale numeric does not have a separator for
1480 [11319] libc: dprintf doesn't handle errors properly
1481 [16346] time: mktime: potentially unsafe use of localtime_offset
1482 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
1484 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
1485 posix_spawn_file_actions_addfchdir_np
1486 [17426] localedata: Indian locales: set the correct date format
1487 [17490] stdio: popen should not invoke atfork handlers
1488 [17783] libc: TIOCSER_TEMT conditions inconsistent
1489 [18040] regex: use-after-free in regexec/get_subexp
1490 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
1491 [20018] network: getaddrinfo should reject IP addresses with trailing
1492 characters (CVE-2016-10739)
1493 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
1494 [20271] libc: Missing "\n" in __libc_fatal calls
1495 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
1496 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
1497 pointer argument is non-NULL
1498 [21037] stdio: open_memstream and freopen
1499 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
1500 [21716] time: Crash in glibc's mktime in low-memory situations
1501 [22834] stdio: Subprocess forked by popen may crash in Linux when
1502 multithreads call popen
1503 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
1504 and pthread_create fails.
1505 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
1506 [23125] libc: riscv64: endless loop when throwing an exception from a
1508 [23275] nptl: Race in pthread_mutex_lock while promoting to
1509 PTHREAD_MUTEX_ELISION_NP.
1510 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
1512 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
1514 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
1516 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
1517 [23509] dynamic-link: CET enabled glibc is incompatible with the older
1519 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
1520 [23521] nss: get_next_alias nss_files file stream leak
1521 [23538] nptl: Hang in pthread_cond_broadcast
1522 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
1523 [23578] regex: Invalid memory access if regex pattern contains NUL byte
1524 [23579] libc: Errors misreported in preadv2
1525 [23597] build: support/test-container.c doesn't work with different
1527 [23603] time: mktime signed integer overflow on large timestamps
1528 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
1529 [23614] libc: powerpc: missing CFI register information in __mpn_*
1531 [23637] string: Generic strstr/strcasestr fails with huge needles
1532 [23640] libc: no way to easily clear FD_CLOEXEC in
1533 posix_spawn_file_actions_adddup2()
1534 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
1536 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
1538 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
1539 [23689] libc: Bug in documentation for rusage.ru_ixrss in
1540 bits/types/struct_rusage.h
1541 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
1543 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
1545 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
1546 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
1547 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
1549 [23724] localedata: Albanian date formats are incorrect
1550 [23735] math: libnldbl_nonshared.a references internal libm symbols
1551 [23740] localedata: kl_GL: Month names and date formats need update
1552 [23744] regex: regex refactorings to remove BE, avoid duplication
1553 [23745] time: mktime fix for Gnulib + coreutils
1554 [23758] time: Improve the width of alternate representation for year in
1556 [23783] libc: [mips] Missing CMSPAR bits/termios.h
1557 [23789] time: mktime does not set errno on failure
1558 [23791] localedata: Wrong monetary format for ca_ES locale
1559 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
1560 [23794] locale: c16rtomb does not handle surrogate pairs
1561 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
1562 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
1563 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
1564 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
1565 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
1566 [23862] libc: [sh] missing kernel-features.h undefines
1567 [23864] libc: [riscv] missing kernel-features.h undefines
1568 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
1569 [23907] malloc: Incorrect double-free malloc tcache check disregards
1571 [23913] libc: off-by-one in function maybe_script_execute in
1572 sysdeps/posix/spawni.c
1573 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
1574 [23923] locale: Add --no-hard-links option to localedef
1575 [23927] network: Linux if_nametoindex() does not close descriptor
1577 [23961] math: powf can overflow to inf without setting errno in non-
1578 nearest rounding mode
1579 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
1580 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
1581 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
1582 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
1583 [24011] localedata: Fixed small type in comment for locale bs_BA
1584 [24018] libc: gettext() may return NULL
1585 [24022] build: riscv build failure with Linux kernel 4.20-rc7
1586 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
1587 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
1589 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
1590 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
1592 [24046] localedata: en_US locale doesn't define date_fmt
1593 [24063] manual: @var{errno} should be @code{errno}
1594 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
1595 [24088] libc: VSCR field is not being correctly read in ucontext_t on
1597 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
1599 [24097] string: Can't use 64-bit register for size_t in assembly codes for
1601 [24110] hurd: SS_DISABLE never set in stack_t value returned by
1603 [24112] network: Do not send DNS queries for non-host names (where all
1604 answers will be rejected)
1605 [24130] libc: alpha __remqu corrupts $f3 register
1612 * The localization data for ISO 14651 is updated to match the 2016
1613 Edition 4 release of the standard, this matches data provided by
1614 Unicode 9.0.0. This update introduces significant improvements to the
1615 collation of Unicode characters. This release deviates slightly from
1616 the standard in that the collation element ordering for lowercase and
1617 uppercase LATIN script characters is adjusted to ensure that regular
1618 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
1619 is not matched by [a-z]. With the update many locales have been
1620 updated to take advantage of the new collation information. The new
1621 collation information has increased the size of the compiled locale
1622 archive or binary locales.
1624 * The GNU C Library can now be compiled with support for Intel CET, AKA
1625 Intel Control-flow Enforcement Technology. When the library is built
1626 with --enable-cet, the resulting glibc is protected with indirect
1627 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
1628 compatible with all existing executables and shared libraries. This
1629 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
1630 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
1631 capable of multi-byte NOPs, like x86-64 processors as well as Intel
1632 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
1633 x86_64 and x32 on non-CET processors. --enable-cet has been tested
1634 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
1637 * The GNU C Library now has correct support for ABSOLUTE symbols
1638 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
1639 relocated incorrectly or in some cases discarded. The GNU linker can
1640 make use of the newer semantics, but it must communicate it to the
1641 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
1642 field) to indicate such support is required.
1644 * Unicode 11.0.0 Support: Character encoding, character type info, and
1645 transliteration tables are all updated to Unicode 11.0.0, using
1646 generator scripts contributed by Mike FABIAN (Red Hat).
1648 * <math.h> functions that round their results to a narrower type are added
1649 from TS 18661-1:2014 and TS 18661-3:2015:
1651 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
1652 fMxaddfNx functions.
1654 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
1655 fMxsubfNx functions.
1657 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
1658 fMxmulfNx functions.
1660 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
1661 fMxdivfNx functions.
1663 * Two grammatical forms of month names are now supported for the following
1664 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
1665 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
1666 support two grammatical forms in abbreviated month names: Catalan, Greek,
1669 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
1670 include the support for two grammatical forms of month names.
1672 * Building and running on GNU/Hurd systems now works without out-of-tree
1675 * The renameat2 function has been added, a variant of the renameat function
1676 which has a flags argument. If the flags are zero, the renameat2 function
1677 acts like renameat. If the flag is not zero and there is no kernel
1678 support for renameat2, the function will fail with an errno value of
1679 EINVAL. This is different from the existing gnulib function renameatu,
1680 which performs a plain rename operation in case of a RENAME_NOREPLACE
1681 flags and a non-existing destination (and therefore has a race condition
1682 that can clobber the destination inadvertently).
1684 * The statx function has been added, a variant of the fstatat64
1685 function with an additional flags argument. If there is no direct
1686 kernel support for statx, glibc provides basic stat support based on
1687 the fstatat64 function.
1689 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
1690 library if installed. libidn2 version 2.0.5 or later is recommended. If
1691 libidn2 is not available, internationalized domain names are not encoded
1692 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
1693 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
1694 with an encoding error.) Flags which used to change the IDN encoding and
1695 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
1696 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
1697 deprecated. They no longer have any effect.
1699 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
1700 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
1701 range of ELF gABI expressions including such constructs as
1702 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
1703 have been further restricted, and where in the past a dynamic string
1704 token sequence may have been interpreted as a literal string it will
1705 now cause a load failure. These load failures were always considered
1706 unspecified behaviour from the perspective of the dynamic loader, and
1707 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
1708 results in a load failure now.
1710 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
1711 implementation includes all the standard functions provided by
1714 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
1715 thrd_detach, thrd_exit, and thrd_join for thread management.
1717 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
1718 mtx_destroy for mutual exclusion.
1720 - call_once for function call synchronization.
1722 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
1723 cnd_wait for conditional variables.
1725 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
1727 Application developers must link against libpthread to use ISO C threads.
1729 Deprecated and removed features, and other changes affecting compatibility:
1731 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
1732 installed. Software that was using either header should be updated to
1733 use standard <stdio.h> interfaces instead.
1735 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
1736 This was never required by the C standard, and the macros just expanded
1737 to call alternative names for the same functions. If you hoped getc and
1738 putc would provide performance improvements over fgetc and fputc, instead
1739 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
1740 necessary, flockfile and funlockfile.
1742 * All stdio functions now treat end-of-file as a sticky condition. If you
1743 read from a file until EOF, and then the file is enlarged by another
1744 process, you must call clearerr or another function with the same effect
1745 (e.g. fseek, rewind) before you can read the additional data. This
1746 corrects a longstanding C99 conformance bug. It is most likely to affect
1747 programs that use stdio to read interactive input from a terminal.
1750 * The macros 'major', 'minor', and 'makedev' are now only available from
1751 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
1752 headers that happen to include <sys/types.h>. These macros are rarely
1753 used, not part of POSIX nor XSI, and their names frequently collide with
1754 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
1755 further explanation.
1757 <sys/sysmacros.h> is a GNU extension. Portable programs that require
1758 these macros should first include <sys/types.h>, and then include
1759 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
1761 * The tilegx*-*-linux-gnu configurations are no longer supported.
1763 * The obsolete function ustat is no longer available to newly linked
1764 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
1765 function has been deprecated in favor of fstatfs and statfs.
1767 * The obsolete function nfsservctl is no longer available to newly linked
1768 binaries. This function was specific to systems using the Linux kernel
1769 and could not usefully be used with the GNU C Library on systems with
1770 version 3.1 or later of the Linux kernel.
1772 * The obsolete function name llseek is no longer available to newly linked
1773 binaries. This function was specific to systems using the Linux kernel
1774 and was not declared in a header. Programs should use the lseek64 name
1775 for this function instead.
1777 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
1778 getaddrinfo and getnameinfo functions have been deprecated. The behavior
1779 previously selected by them is now always enabled.
1781 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
1782 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
1783 restriction (rejecting '_' in host names, among other things) has been
1784 removed, for increased compatibility with non-IDN name resolution.
1786 * The fcntl function now have a Long File Support variant named fcntl64. It
1787 is added to fix some Linux Open File Description (OFD) locks usage on non
1788 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
1789 fcntl and LFS support is handled transparently. Also for Linux, the OFD
1790 locks act as a cancellation entrypoint.
1792 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
1793 ecb_crypt, and des_setparity are no longer available to newly linked
1794 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
1795 longer installed. These functions encrypted and decrypted data with the
1796 DES block cipher, which is no longer considered secure. Software that
1797 still uses these functions should switch to a modern cryptography library,
1800 * Reflecting the removal of the encrypt and setkey functions above, the
1801 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
1802 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1805 * The obsolete function fcrypt is no longer available to newly linked
1806 binaries. It was just another name for the standard function crypt,
1807 and it has not appeared in any header file in many years.
1809 * We have tentative plans to hand off maintenance of the passphrase-hashing
1810 library, libcrypt, to a separate development project that will, we hope,
1811 keep up better with new passphrase-hashing algorithms. We will continue
1812 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1813 'crypt_r' should not need to change at all; however, distributions will
1814 need to install <crypt.h> and libcrypt from a separate project.
1816 In this release, if the configure option --disable-crypt is used, glibc
1817 will not install <crypt.h> or libcrypt, making room for the separate
1818 project's versions of these files. The plan is to make this the default
1819 behavior in a future release.
1821 Changes to build and runtime requirements:
1823 GNU make 4.0 or later is now required to build glibc.
1825 Security related changes:
1827 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1828 been fixed by removing the glibc-internal IDNA implementation and using
1829 the system-provided libidn2 library instead. Originally reported by Hanno
1830 Böck and Christian Weisgerber.
1832 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1833 architecture could corrupt memory. Reported by Max Horn.
1835 CVE-2018-11236: Very long pathname arguments to realpath function could
1836 result in an integer overflow and buffer overflow. Reported by Alexey
1839 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1840 architecture could write beyond the target buffer, resulting in a buffer
1841 overflow. Reported by Andreas Schwab.
1843 The following bugs are resolved with this release:
1845 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1846 [6889] manual: 'PWD' mentioned but not specified
1847 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1848 when __WORDSIZE != 64
1849 [13762] regex: re_search etc. should return -2 on memory exhaustion
1850 [13888] build: /tmp usage during testing
1851 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1852 [14092] nptl: Support C11 threads
1853 [14095] localedata: Review / update collation data from Unicode / ISO
1855 [14508] libc: -Wformat warnings
1856 [14553] libc: Namespace pollution loff_t in sys/types.h
1857 [14890] libc: Make NT_PRFPREG canonical.
1858 [15105] libc: Extra PLT references with -Os
1859 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1861 [16335] manual: Feature test macro documentation incomplete and out of
1863 [16552] libc: Unify umount implementations in terms of umount2
1864 [17082] libc: htons et al.: statement-expressions prevent use on global
1865 scope with -O1 and higher
1866 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1867 [17438] localedata: pt_BR: wrong d_fmt delimiter
1868 [17662] libc: please implement binding for the new renameat2 syscall
1869 [17721] libc: __restrict defined as /* Ignore */ even in c11
1870 [17979] libc: inconsistency between uchar.h and stdint.h
1871 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1872 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1873 horrible machine code)
1874 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1876 [18471] libc: llseek should be a compat symbol
1877 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1879 [18991] nss: nss_files skips large entry in database
1880 [19239] libc: Including stdlib.h ends up with macros major and minor being
1882 [19463] libc: linknamespace failures when compiled with -Os
1883 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1884 [19527] locale: Normalized charset name not recognized by setlocale
1885 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1886 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1888 [19728] network: out of bounds stack read in libidn function
1889 idna_to_ascii_4i (CVE-2016-6261)
1890 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1891 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1892 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1894 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1895 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1896 [20419] dynamic-link: files with large allocated notes crash in
1898 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1899 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1900 [20980] manual: CFLAGS environment variable replaces vital options
1901 [21163] regex: Assertion failure in pop_fail_stack when executing a
1902 malformed regexp (CVE-2015-8985)
1903 [21234] manual: use of CFLAGS makes glibc detect no optimization
1904 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1905 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1906 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1907 [21508] locale: intl/tst-gettext failure with latest msgfmt
1908 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1909 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1910 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1912 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1914 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1915 [22247] network: Integer overflow in the decode_digit function in
1916 puny_decode.c in libidn (CVE-2017-14062)
1917 [22342] nscd: NSCD not properly caching netgroup
1918 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1919 [22550] localedata: es_ES locale (and other es_* locales): collation
1920 should treat ñ as a primary different character, sync the collation
1921 for Spanish with CLDR
1922 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1923 by gcc configured with --enable-default-pie
1924 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1925 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1926 crossing 2GB threshold (CVE-2017-18269)
1927 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1929 [22735] time: Misleading typo in time.h source comment regarding
1931 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1932 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1933 `__assert_perror_fail ()' to `__assert_fail_base ()'
1934 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1936 [22786] libc: Stack buffer overflow in realpath() if input size is close
1937 to SSIZE_MAX (CVE-2018-11236)
1938 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1939 through an absolute DT_NEEDED path
1940 [22792] build: tcb-offsets.h dependency dropped
1941 [22797] libc: pkey_get() uses non-reserved name of argument
1942 [22807] libc: PTRACE_* constants missing for powerpc
1943 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1944 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1945 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1946 [22848] localedata: ca_ES: update date definitions from CLDR
1947 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1948 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1949 [22896] localedata: Update locale data for an_ES
1950 [22902] math: float128 test failures with GCC 8
1951 [22918] libc: multiple common of `__nss_shadow_database'
1952 [22919] libc: sparc32: backtrace yields infinite backtrace with
1954 [22926] libc: FTBFS on powerpcspe
1955 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1957 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1958 [22947] libc: FAIL: misc/tst-preadvwritev2
1959 [22963] localedata: cs_CZ: Add alternative month names
1960 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1961 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1962 [22998] dynamic-link: execstack tests are disabled when SELinux is
1964 [23005] network: Crash in __res_context_send after memory allocation
1966 [23007] math: strtod cannot handle -nan
1967 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1968 [23036] regex: regex equivalence class regression
1969 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1970 [23069] libc: sigaction broken on riscv64-linux-gnu
1971 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1972 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1973 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1974 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1975 and libc build with -Os)
1976 [23140] localedata: More languages need two forms of month names
1977 [23145] libc: _init/_fini aren't marked as hidden
1978 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1979 [23171] math: C++ iseqsig for long double converts arguments to double
1980 [23178] nscd: sudo will fail when it is run in concurrent with commands
1981 that changes /etc/passwd
1982 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1984 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1985 [23208] localedata: New locale - Lower Sorbian (dsb)
1986 [23233] regex: Memory leak in build_charclass_op function in file
1988 [23236] stdio: Harden function pointers in _IO_str_fields
1989 [23250] nptl: Offset of __private_ss differs from GCC
1990 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1991 -mtune=generic -mfpmath=sse
1992 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1994 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1995 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1997 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1998 [23277] math: nan function should not have const attribute
1999 [23279] math: scanf and strtod wrong for some hex floating-point
2000 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
2002 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
2003 [23303] build: undefined reference to symbol
2004 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
2005 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
2007 [23313] stdio: libio vtables validation and standard file object
2009 [23329] libc: The __libc_freeres infrastructure is not properly run across
2011 [23349] libc: Various glibc headers no longer compatible with
2013 [23351] malloc: Remove unused code related to heap dumps and malloc
2015 [23363] stdio: stdio-common/tst-printf.c has non-free license
2016 [23396] regex: Regex equivalence regression in single-byte locales
2017 [23422] localedata: oc_FR: More updates of locale data
2018 [23442] build: New warning with GCC 8
2019 [23448] libc: Out of bounds access in IBM-1390 converter
2020 [23456] libc: Wrong index_cpu_LZCNT
2021 [23458] build: tst-get-cpu-features-static isn't added to tests
2022 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
2024 [23467] dynamic-link: x86/CET: A property note parser bug
2031 * The GNU C Library can now be compiled with support for building static
2032 PIE executables (See --enable-static-pie in INSTALL). These static PIE
2033 executables are like static executables but can be loaded at any address
2034 and provide additional security hardening benefits at the cost of some
2035 memory and performance. When the library is built with --enable-static-pie
2036 the resulting libc.a is usable with GCC 8 and above to create static PIE
2037 executables using the GCC option '-static-pie'. This feature is currently
2038 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
2039 aarch64 with binutils 2.30 or later.
2041 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
2042 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
2045 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
2047 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
2049 * In order to support faster and safer process termination the malloc API
2050 family of functions will no longer print a failure address and stack
2051 backtrace after detecting heap corruption. The goal is to minimize the
2052 amount of work done after corruption is detected and to avoid potential
2053 security issues in continued process execution. Reducing shutdown time
2054 leads to lower overall process restart latency, so there is benefit both
2055 from a security and performance perspective.
2057 * The abort function terminates the process immediately, without flushing
2058 stdio streams. Previous glibc versions used to flush streams, resulting
2059 in deadlocks and further data corruption. This change also affects
2060 process aborts as the result of assertion failures.
2062 * On platforms where long double has the IEEE binary128 format (aarch64,
2063 alpha, mips64, riscv, s390 and sparc), the math library now implements
2064 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
2065 These are the same interfaces added in version 2.26 for some platforms where
2066 this format is supported but is not the format of long double.
2068 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
2069 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
2070 implements interfaces for that type, as defined by ISO/IEC TS
2071 18661-3:2015. These are corresponding interfaces to those supported for
2074 * The math library now implements interfaces for the _Float32, _Float64 and
2075 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
2076 corresponding interfaces to those supported for _Float128.
2078 * glibc now implements the memfd_create and mlock2 functions on Linux.
2080 * Support for memory protection keys was added. The <sys/mman.h> header now
2081 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
2084 * The copy_file_range function was added.
2086 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
2088 * The ldconfig utility now processes `include' directives using the C/POSIX
2089 collation ordering. Previous glibc versions used locale-specific
2090 ordering, the change might break systems that relied on that.
2092 * Support for two grammatical forms of month names has been added.
2093 In a call to strftime, the "%B" and "%b" format specifiers will now
2094 produce the grammatical form required when the month is used as part
2095 of a complete date. New "%OB" and "%Ob" specifiers produce the form
2096 required when the month is named by itself. For instance, in Greek
2097 and in many Slavic and Baltic languages, "%B" will produce the month
2098 in genitive case, and "%OB" will produce the month in nominative case.
2100 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
2101 are all valid and will all accept any known form of month
2102 name---standalone or complete, abbreviated or full. In a call to
2103 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
2104 the strings used by "%B" and "%b", respectively. New query
2105 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
2106 used by "%OB" and "%Ob", respectively.
2108 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
2109 define the strings for %OB and %Ob, respectively; these have the
2110 same syntax as "mon" and "abmon". These arrays are optional; if they
2111 are not provided then they have the same content as "mon" and "abmon",
2114 These features are provided for locales which define "alt_mon" and/or
2115 "ab_alt_mon" in their locale source data. This release includes such
2116 alternative month name data for the following languages: Belarusian,
2117 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
2119 This feature is currently a GNU extension, but it is expected to
2120 be added to the next revision of POSIX, and it is also already
2121 available on some BSD-derived operating systems.
2123 This feature will cause existing statically compiled applications
2124 to fail to load locales and fall back to the builtin C/POSIX locales.
2125 See notes below for other changes affecting compatibility.
2127 * Support for the RISC-V ISA running on Linux has been added. This port
2128 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
2129 for the following ISA and ABI pairs:
2135 Deprecated and removed features, and other changes affecting compatibility:
2137 * Statically compiled applications attempting to load locales compiled for the
2138 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
2139 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
2140 support for two grammatical forms of the month names, also extends the locale
2141 data binary format. Static applications needing locale support must be
2142 recompiled to match the runtime and data they are deployed with. In some
2143 distributions there is an upgrade window where dynamically linked applications
2144 may use a new library but the old locale data and also fall back to the
2145 builtin C/POSIX locales; restarting the application process is sufficient to
2148 * Support for statically linked applications which call dlopen is deprecated
2149 and will be removed in a future version of glibc. Applications which call
2150 dlopen need to be linked dynamically instead.
2152 * Support for old programs which use internal stdio data structures and
2153 functions is deprecated. This includes programs which use the C++ streams
2154 provided by libstdc++ in GCC 2.95. Programs which use the internal
2155 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
2156 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
2157 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
2158 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
2159 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
2160 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
2161 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
2162 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
2163 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
2164 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
2165 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
2166 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
2167 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
2168 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
2169 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
2170 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
2171 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
2172 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
2173 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
2174 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
2175 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
2176 future version of glibc. Unlike other symbol removals, these old
2177 applications will not be supported using compatibility symbols.
2179 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
2180 defined by <sys/ptrace.h>.
2182 * libm no longer supports SVID error handling (calling a user-provided
2183 matherr function on error) or the _LIB_VERSION variable to control error
2184 handling. (SVID error handling and the _LIB_VERSION variable still work
2185 for binaries linked against older versions of the GNU C Library.) The
2186 libieee.a library is no longer provided. math.h no longer defines struct
2187 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
2188 TLOSS, PLOSS and HUGE.
2190 * The libm functions pow10, pow10f and pow10l are no longer supported for
2191 new programs. Programs should use the standard names exp10, exp10f and
2192 exp10l for these functions instead.
2194 * The mcontext_t type is no longer the same as struct sigcontext. On
2195 platforms where it was previously the same, this changes the C++ name
2196 mangling for interfaces involving this type.
2198 * The add-ons mechanism for building additional packages at the same time as
2199 glibc has been removed. The --enable-add-ons configure option is now
2202 * The --without-fp configure option is now ignored. Whether hardware
2203 floating-point instructions are used is now configured based on whether
2204 the compiler used at configure time (without any options implied by a
2205 --with-cpu= configure option) uses such instructions.
2207 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
2208 the specified string can be parsed as a domain name.
2210 * In the malloc_info output, the <heap> element may contain another <aspace>
2211 element, "subheaps", which contains the number of sub-heaps.
2213 * The libresolv function p_secstodate is no longer supported for new
2216 * The tilepro-*-linux-gnu configuration is no longer supported.
2218 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
2219 and will be removed in a future release. Software that is still using
2220 either header should be updated to use standard <stdio.h> interfaces
2223 libio.h was originally the header for a set of supported GNU extensions,
2224 but they have not been maintained as such in many years, they are now
2225 standing in the way of improvements to stdio, and we don't think there are
2226 any remaining external users. _G_config.h was never intended for public
2227 use, but predates the bits convention.
2229 Changes to build and runtime requirements:
2231 * bison version 2.7 or later is required to generate code in the 'intl'
2234 Security related changes:
2236 CVE-2009-5064: The ldd script would sometimes run the program under
2237 examination directly, without preventing code execution through the
2238 dynamic linker. (The glibc project disputes that this is a security
2239 vulnerability; only trusted binaries must be examined using the ldd
2242 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
2243 suffered from a one-byte overflow during ~ operator processing (either
2244 on the stack or the heap, depending on the length of the user name).
2245 Reported by Tim Rühsen.
2247 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
2248 would sometimes fail to free memory allocated during ~ operator
2249 processing, leading to a memory leak and, potentially, to a denial
2252 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
2253 without GLOB_NOESCAPE, could write past the end of a buffer while
2254 unescaping user names. Reported by Tim Rühsen.
2256 CVE-2017-17426: The malloc function, when called with an object size near
2257 the value SIZE_MAX, would return a pointer to a buffer which is too small,
2258 instead of NULL. This was a regression introduced with the new malloc
2259 thread cache in glibc 2.26. Reported by Iain Buclaw.
2261 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
2262 to the allocation of too much memory. (This is not a security bug per se,
2263 it is mentioned here only because of the CVE assignment.) Reported by
2266 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
2267 of the number of search path components. (This is not a security
2268 vulnerability per se because no trust boundary is crossed if the fix for
2269 CVE-2017-1000366 has been applied, but it is mentioned here only because
2270 of the CVE assignment.) Reported by Qualys.
2272 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
2273 for AT_SECURE or SUID binaries could be used to load libraries from the
2276 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
2277 succeeds without returning an absolute path due to unexpected behaviour
2278 of the Linux kernel getcwd syscall. Reported by halfdog.
2280 CVE-2018-6485: The posix_memalign and memalign functions, when called with
2281 an object size near the value of SIZE_MAX, would return a pointer to a
2282 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
2284 CVE-2018-6551: The malloc function, when called with an object size near
2285 the value of SIZE_MAX, would return a pointer to a buffer which is too
2286 small, instead of NULL.
2288 The following bugs are resolved with this release:
2290 [866] glob: glob should match dangling symlinks
2291 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
2292 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
2294 [5997] math: Very slow execution of sinf function
2295 [10580] localedata: hr_HR: updated locale
2296 [10871] locale: 'mon' array should contain both nominative and genitive
2298 [12349] localedata: eu_ES: incorrect thousands separator
2299 [13605] localedata: shn_MM: new Shan locale
2300 [13805] localedata: ru_RU: currency should use ',' as radix point
2301 [13953] localedata: km_KH: locale update
2302 [13994] localedata: mjw_IN: new locale
2303 [14121] build: make writes .mo files in po directory
2304 [14333] libc: Fix the race between atexit() and exit()
2305 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
2306 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
2308 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
2309 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
2310 width Latin characters
2311 [15332] localedata: es_CU: locale update
2312 [15436] stdio: Don't close or flush stdio streams on abort
2313 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
2315 [16148] localedata: ca_ES: incorrect thousands separator
2316 [16750] dynamic-link: ldd should not try to execute the binaries
2318 [16777] localedata: pl_PL: incorrect thousands separator in locale
2319 [16905] localedata: hanzi: new collation
2320 [17563] localedata: cmn_TW: add hanzi collation
2321 [17750] localedata: wrong collation order of diacritics in most locales
2322 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
2324 [17956] build: Build fails on missing definitions from header file
2325 nss/nss.h when Mozilla NSS is used for cryptography
2326 [18203] libc: realpath() does not handle unreachable paths correctly
2327 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
2328 [18812] localedata: kab_DZ: new Kabyle Algeria locale
2329 [18822] libc: Internal functions are called via PLT
2330 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
2331 [19170] libc: __gmon_start__ defined in hppa in crtn.S
2332 [19574] libc: glibc should support building static PIE binaries
2333 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
2335 [19971] glob: glob: Do not skip entries with zero d_ino values
2336 [19982] localedata: fr.po: spelling mistake for error code EXDEV
2337 [20008] localedata: km_KH: convert to translit_neutral
2338 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
2339 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
2340 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
2341 [20482] localedata: de_CH: abbreviated weekdays should be two letters
2342 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
2344 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
2345 they're set, wrong errors returned by gaih_inet when lookup functions
2347 [20756] localedata: [PATCH] Use Unicode wise thousands separator
2348 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
2350 [20952] localedata: yuw_PG: new locale
2351 [21084] localedata: charmaps/IBM858: new codepage
2352 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
2353 [21242] libc: assert gives pedantic warning in old gcc versions
2354 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
2355 __regcall calling convention
2356 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
2357 [21326] libc: C99 functions are not declared for C++11 and later if
2358 _GNU_SOURCE is not predefined by g++
2359 [21457] libc: sys/ucontext.h namespace
2360 [21530] libc: tmpfile() should be implemented using O_TMPFILE
2361 [21660] math: GCC fails to compile a formula with tgmath.h
2362 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
2363 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
2364 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
2365 [21684] math: tgmath.h handling of complex integers
2366 [21685] math: tgmath.h handling of bit-fields
2367 [21686] math: tgmath.h handling of __int128
2368 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2370 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
2372 [21750] localedata: column width of characters incompatible with classical
2374 [21754] malloc: malloc: Perform as little work as possible after heap
2375 consistency check failures
2376 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
2377 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
2378 [21791] string: Unused XXX_chk_XXX functions in libc.a
2379 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
2381 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
2383 [21845] localedata: Added new Locale bho_NP
2384 [21853] localedata: Fix abday Which looks same as day in zh_SG
2385 [21854] localedata: Added New Locale en_SC
2386 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
2387 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
2388 _dl_runtime_resolve_avx_slow
2389 [21885] network: getaddrinfo: gethosts does not release resolver context
2390 on memory allocation failure
2391 [21899] libc: XPG4.2 sigaction namespace
2392 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
2394 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
2396 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
2397 errno value, causing getaddrinfo to fail
2398 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
2399 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
2400 instead of EAI_NODATA
2401 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
2402 constant PTRACE_SEIZE_DEVEL
2403 [21930] math: C-only gcc builtins used in <math.h> isinf
2404 [21932] network: Unpaired __resolv_context_get in generic get*_r
2406 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
2407 [21944] libc: sigval namespace
2408 [21951] localedata: Update hanzi collation by stroke
2409 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
2410 sysdeps/x86_64/fpu/e_expf.S
2411 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
2412 allocation in syscall loops)
2413 [21959] localedata: Fix Country name for xh_ZA
2414 [21960] localedata: Fix abmon for bem_ZM
2415 [21966] math: AVX2 mathvec functions use FMA without checking
2416 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
2417 [21971] localedata: Added New Locale for mfe_MU
2418 [21972] libc: assert macro requires operator== (int) for its argument type
2419 [21973] math: [sparc] libm missing sqrtl compat symbol
2420 [21974] libc: Remove __bb_init_func and __bb_exit_func
2421 [21982] string: stratcliff.c: error: assuming signed overflow does not
2423 [21986] stdio: __guess_grouping is called incorrectly
2424 [21987] math: [sparc32] wrong bits/long-double.h installed
2425 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
2427 [22022] localedata: Missing country_name for mni_IN
2428 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
2430 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
2432 [22026] locale: iconv_open: heap overflow on gconv_init failure
2433 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
2434 [22035] math: [m68k] bits/math-inline.h macro namespace
2435 [22038] localedata: Fix abbreviated weeks and months for Somali
2436 [22044] localedata: Remove redundant data for Limburgish Language
2437 [22050] malloc: Linking with -lmcheck does not hook
2438 __malloc_initialize_hook correctly
2439 [22051] libc: zero terminator in the middle of glibc's .eh_frame
2440 [22052] malloc: malloc failed to compile with GCC 7 and -O3
2441 [22070] localedata: charmaps/UTF-8: wcwidth for
2442 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
2443 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
2444 Jungseong and Jongseong) should be 0
2445 [22078] nss: nss_files performance issue in multi mode
2446 [22082] math: bits/math-finite.h exp10 condition
2447 [22086] libc: pcprofiledump incorrect cross-endian condition
2448 [22093] dynamic-link: ld.so no longer searches in .../x86_64
2449 [22095] network: Name server address allocation memory leak in resolv.conf
2451 [22096] network: __resolv_conf_attach can incorrectly free passed conf
2453 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
2454 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
2456 [22111] malloc: malloc: per thread cache is not returned when thread exits
2457 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
2458 [22134] libc: [linux] implement fexecve with execveat
2459 [22142] libc: [powerpc] printf outputs a wrong value of DBL_MAX on ppc64 and
2461 [22145] libc: ttyname() gives up too early in the face of namespaces
2462 [22146] math: C++ build issue with float128 on x86_64
2463 [22153] nptl: nptl: save error code before process termination
2464 [22156] libc: [hppa,ia64,microblaze] Executable stack default
2465 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
2466 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
2467 [22165] libc: [hppa] Text relocations in libc.so
2468 [22180] libc: destructor registered via __cxa_atexit is called twice
2469 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
2470 symlinks") cause "make" segfaults
2471 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
2473 [22207] libc: FAIL: stdlib/test-atexit-race
2474 [22225] math: nearbyint arithmetic moved before feholdexcept
2475 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
2476 [22235] math: iscanonical in C++ and float128
2477 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
2478 the svid compat wrapper
2479 [22244] math: ynf and yn are wrong without the svid compat wrapper
2480 [22273] libc: Improper assert in Linux posix_spawn implementation
2481 [22284] libc: -pg -pie doesn't work
2482 [22292] locale: localedef exits with error 4 when it should be error 1
2483 [22294] locale: Allow "" for int_currency_symbol definition in locales.
2484 [22295] locale: Don't warn on non-symbolic characters in locale sources in
2486 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
2487 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
2489 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
2490 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
2491 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
2492 [22322] libc: [mips64] wrong bits/long-double.h installed
2493 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
2494 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
2496 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
2497 [22343] malloc: Integer overflow in posix_memalign
2498 [22347] libc: getrandom() returns the number of bytes that were copied to
2499 the buffer even though the comments say "Return 0 on success and -1 on
2501 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
2502 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
2504 [22370] dynamic-link: Incorrect note padding check
2505 [22375] libc: malloc returns pointer from tcache_get when should return
2506 NULL (CVE-2017-17426)
2507 [22377] math: iseqsig, float128 and C++
2508 [22382] localedata: Error in tpi_PG locale
2509 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
2510 inside the ASCII printable range
2511 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
2513 [22403] localedata: Slash needs escaping in some locales
2514 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
2515 [22409] network: res_hnok does not accept some host names used on the
2517 [22412] network: res_dnok, res_hnok should perform syntax checks
2518 [22413] network: ns_name_pton ignores syntactically invalid trailing
2520 [22415] stdio: setvbuf can lead to invalid free/segfault
2521 [22432] build: Non-deterministic build
2522 [22439] malloc: malloc_info should compute summary statistics for all sub-
2524 [22442] network: if_nametoindex could report index for the wrong
2525 networking interface
2526 [22446] build: aliasing violation calling readlink in handle_request
2527 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
2528 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
2529 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
2530 __nscd_hash/__nss_hash
2531 [22463] network: p_secstodate overflow handling
2532 [22469] localedata: pl_PL LC_COLLATE does not use i18n
2533 [22478] libc: sigwait can fail with EINTR
2534 [22505] libc: ldconfig processes include directive in locale-specific
2536 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
2537 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
2538 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
2539 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
2540 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
2541 [22534] localedata: Collation rules for Serbian and Bosnian should be the
2542 same as for Croatian
2543 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
2544 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
2545 [22577] libc: missing newline after "cannot allocate TLS data structures
2547 [22588] manual: manual/conf.texi: missing underscore in front of
2549 [22593] math: nextafter and nexttoward are declared with const attribute
2550 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
2551 [22603] string: ia64 memchr overflows internal pointer check
2552 [22605] libc: SH clone does not set the exit code correctly
2553 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
2555 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
2556 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
2557 modified in case of success
2558 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
2559 [22615] manual: manual: ambiguous wording about errno value in case of
2561 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
2563 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
2564 binaries or if /proc is not mounted (CVE-2017-16997)
2565 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
2566 [22630] build: $(no-pie-ldflag) is no longer effective
2567 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
2568 [22635] nptl: pthread_self returns NULL before libpthread is loaded
2569 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
2570 [22637] nptl: guard size is subtracted from thread stack size instead of
2572 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
2573 [22657] localedata: hu_HU: Avoid double space in date
2574 [22660] math: fmax, fmin sNaN handling on alpha
2575 [22664] libc: New warning of GCC8
2576 [22665] math: alpha: ceil and floor raise inexact exceptions
2577 [22666] math: alpha: trunc raise inexact exceptions
2578 [22667] libc: makecontext lacks stack alignment on i386
2579 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
2580 [22679] libc: getcwd(3) can succeed without returning an absolute path
2582 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
2583 elision and tunables
2584 [22687] math: [powerpc-nofpu] complex long double functions spurious
2586 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
2587 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
2588 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
2590 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
2591 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
2593 [22701] nis: Incomplete removal of libnsl
2594 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
2595 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
2596 [22715] dynamic-link: FAIL: elf/tst-audit10
2597 [22719] libc: Backtrace tests fail on hppa
2598 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
2599 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
2600 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
2601 before the first call to crypt_r () in crypt/badsalttest.c
2608 * A per-thread cache has been added to malloc. Access to the cache requires
2609 no locks and therefore significantly accelerates the fast path to allocate
2610 and free small amounts of memory. Refilling an empty cache requires locking
2611 the underlying arena. Performance measurements show significant gains in a
2612 wide variety of user workloads. Workloads were captured using a special
2613 instrumented malloc and analyzed with a malloc simulator. Contributed by
2614 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
2616 * Unicode 10.0.0 Support: Character encoding, character type info, and
2617 transliteration tables are all updated to Unicode 10.0.0, using
2618 generator scripts contributed by Mike FABIAN (Red Hat).
2619 These updates cause user visible changes, especially the changes in
2620 wcwidth for many emoji characters cause problems when emoji sequences
2621 are rendered with pango, see for example:
2622 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
2624 * Collation of Hungarian has been overhauled and is now consistent with "The
2625 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
2628 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
2630 - The GNU C Library will now detect when /etc/resolv.conf has been
2631 modified and reload the changed configuration. The new resolver option
2632 “no-reload” (RES_NORELOAD) disables this behavior.
2634 - The GNU C Library now supports an arbitrary number of search domains
2635 (configured using the “search” directive in /etc/resolv.conf);
2636 previously, there was a hard limit of six domains. For backward
2637 compatibility, applications that directly modify the ‘_res’ global
2638 object are still limited to six search domains.
2640 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
2641 Library will now randomly pick a name server from the configuration as a
2642 starting point. (Previously, the second name server was always used.)
2644 * The tunables feature is now enabled by default. This allows users to tweak
2645 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
2647 * New function reallocarray, which resizes an allocated block (like realloc)
2648 to the product of two sizes, with a guaranteed clean failure upon integer
2649 overflow in the multiplication. Originally from OpenBSD, contributed by
2650 Dennis Wölfing and Rüdiger Sonderfeld.
2652 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
2653 These are extended versions of preadv and pwritev, respectively, taking an
2654 additional flags argument. The set of supported flags depends on the
2655 running kernel; full support currently requires kernel 4.7 or later.
2657 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
2658 create a new session ID for the spawned process. This feature is
2659 scheduled to be added to the next major revision of POSIX; for the time
2660 being, it is available under _GNU_SOURCE.
2662 * errno.h is now safe to use from C-preprocessed assembly language on all
2663 supported operating systems. In this context, it will only define the
2664 Exxxx constants, as preprocessor macros expanding to integer literals.
2666 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
2667 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
2668 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
2669 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
2671 To compile programs that use this feature, the compiler must support
2672 128-bit floating point with the type name _Float128 (as defined by TS
2673 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
2674 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
2675 must be defined to make the new interfaces visible.
2677 The new functions and macros correspond to those present for other
2678 floating-point types (except for a few obsolescent interfaces not
2679 supported for the new type), with F128 or f128 suffixes; for example,
2680 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
2681 printf or scanf formats for the new type; the strfromf128 and strtof128
2682 interfaces should be used instead.
2684 Deprecated and removed features, and other changes affecting compatibility:
2686 * The synchronization that pthread_spin_unlock performs has been changed to
2687 now be equivalent to a C11 atomic store with release memory order to the
2688 spin lock's memory location. Previously, several (but not all)
2689 architectures used stronger synchronization (e.g., containing what is
2690 often called a full barrier). This change can improve performance, but
2691 may affect odd fringe uses of spin locks that depend on the previous
2692 behavior (e.g., using spin locks as atomic variables to try to implement
2693 Dekker's mutual exclusion algorithm).
2695 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
2698 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
2699 will only be built and installed when the GNU C Library is configured with
2700 --enable-obsolete-rpc. This allows alternative RPC implementations, such
2701 as TIRPC or rpcsvc-proto, to be used.
2703 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
2704 libnss_compat, are deprecated, and will not be built or installed by
2707 The NIS(+) support library, libnsl, is also deprecated. By default, a
2708 compatibility shared library will be built and installed, but not headers
2709 or development libraries. Only a few NIS-related programs require this
2710 library. (In particular, the GNU C Library has never required programs
2711 that use 'gethostbyname' to be linked with libnsl.)
2713 Replacement implementations based on TIRPC, which additionally support
2714 IPv6, are available from <https://github.com/thkukuk/>. The configure
2715 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
2716 name service modules, to be built and installed.
2718 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
2719 support is enabled, the configured recursive resolver must support EDNS.
2720 (Responding to EDNS-enabled queries with responses which are not
2721 EDNS-enabled is fine, but FORMERR responses are not.)
2723 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
2724 servers have not supported this opcode for a long time.
2726 * The _res_opcodes variable has been removed from libresolv. It had been
2727 exported by accident.
2729 * <string.h> no longer includes inline versions of any string functions,
2730 as this kind of optimization is better done by the compiler. The macros
2731 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
2733 * The nonstandard header <xlocale.h> has been removed. Most programs should
2734 use <locale.h> instead. If you have a specific need for the definition of
2735 locale_t with no other declarations, please contact
2736 libc-alpha@sourceware.org and explain.
2738 * The obsolete header <sys/ultrasound.h> has been removed.
2740 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
2742 * The obsolete function cfree has been removed. Applications should use
2745 * The stack_t type no longer has the name struct sigaltstack. This changes
2746 the C++ name mangling for interfaces involving this type.
2748 * The ucontext_t type no longer has the name struct ucontext. This changes
2749 the C++ name mangling for interfaces involving this type.
2751 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
2752 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
2753 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
2754 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
2755 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
2756 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
2757 fpregset_t type no longer has the name struct fpu. This changes the C++
2758 name mangling for interfaces involving those types.
2760 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
2761 synced with the kernel:
2763 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
2764 are not supported on this architecture and have been removed.
2766 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
2767 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
2768 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
2770 Programs that assume the GET/SETREGS ptrace requests are universally
2771 available will now fail to build, instead of malfunctioning at runtime.
2773 Changes to build and runtime requirements:
2775 * Linux kernel 3.2 or later is required at runtime, on all architectures
2776 supported by that kernel. (This is a change from version 2.25 only for
2779 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
2781 * On most architectures, GCC 4.9 or later is required to build the GNU C
2782 Library. On powerpc64le, GCC 6.2 or later is required.
2784 Older GCC versions and non-GNU compilers are still supported when
2785 compiling programs that use the GNU C Library. (We do not know exactly
2786 how old, and some GNU extensions to C may be _de facto_ required. If you
2787 are interested in helping us make this statement less vague, please
2788 contact libc-alpha@sourceware.org.)
2790 Security related changes:
2792 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
2793 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
2795 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
2796 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
2798 * Avoid printing a backtrace from the __stack_chk_fail function since it is
2799 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
2802 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
2803 fixed (CVE-2017-12133).
2805 The following bugs are resolved with this release:
2807 [984] network: Respond to changed resolv.conf in gethostbyname
2808 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2809 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2811 [12189] libc: __stack_chk_fail should not attempt a backtrace
2813 [14096] time: Race condition on timezone/tst-timezone.out
2814 [14172] localedata: az_IR: new locale
2815 [14995] build: glibc fails to build if gold is the default linker, even if
2817 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2818 [16637] network: inet_pton function is accepting IPv6 with bad format
2819 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2820 x86 and other generic code
2821 [16875] localedata: ko_KR: fix lang_name
2822 [17225] localedata: ar_SY: localized month names for May and June are
2824 [17297] localedata: da_DK: wrong date_fmt string
2825 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2826 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2827 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2828 [19066] localedata: ar_SA abbreviated day and month names are in English
2829 [19569] network: resolv: Support an arbitrary number of search domains
2830 [19570] network: Implement random DNS server selection in the stub
2832 [19838] locale: localedef fails on PA-RISC
2833 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2834 order of 0D36 and 0D37
2835 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2837 [20098] libc: FAIL: debug/backtrace-tst on hppa
2838 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2840 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2842 [20313] localedata: Update locale data to Unicode 9.0
2843 [20424] manual: Document how to provide a malloc replacement
2844 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2846 [20686] locale: Add el_GR@euro to SUPPORTED.
2847 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2848 failures consistently
2849 [21015] dynamic-link: Document and fix --enable-bind-now
2850 [21016] nptl: pthread_cond support is broken on hppa
2851 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2852 frame-pointer on i386
2853 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2855 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2856 [21088] libc: Build fails with --enable-static-nss
2857 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2858 generic c code is used
2859 [21109] libc: Tunables broken on big-endian
2860 [21112] math: powf has large ulp errors with base close to 1 and exponent
2862 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2864 [21120] malloc: glibc malloc is incompatible with GCC 7
2865 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2867 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2868 (-0.0) when linking with -lieee
2869 [21171] math: log10, log2 and lgamma return incorrect results
2870 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2871 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2872 [21207] localedata: ce_RU: update weekdays from CLDR
2873 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2874 [21217] localedata: Update months from CLDR-31
2875 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2876 [21243] libc: support_delete_temp_file should issue warning for failed
2878 [21244] libc: support resolv_test_start() socket fd close should be
2880 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2881 new posix_spawn implementation
2882 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2883 leads to lower CPU frequency
2884 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2885 [21261] libc: [sparc64] bits/setjmp.h namespace
2886 [21267] network: [mips] bits/socket.h IOC* namespace
2887 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2888 [21270] libc: mmap64 silently truncates large offset values
2889 [21275] libc: posix_spawn always crashes on ia64 now
2890 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2891 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2892 [21289] libc: Incorrect declaration for 32-bit platforms with
2893 _FILE_OFFSET_BITS=64 causes build error
2894 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2895 not support gethostbyname4_r
2896 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2898 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2900 [21340] libc: Support POSIX_SPAWN_SETSID
2901 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2902 [21359] network: ns_name_pack needs additional byte in destination buffer
2903 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2904 against fragmentation attacks (CVE-2017-12132)
2905 [21369] network: resolv: Remove EDNS fallback
2906 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2908 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2909 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2910 [21393] stdio: Missing dup3 error check in freopen, freopen64
2911 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2912 [21399] localedata: Bad description for U00EC in
2913 localedata/charmaps/CP1254
2914 [21411] malloc: realloc documentation error
2915 [21426] network: sys/socket.h uio.h namespace
2916 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2917 [21445] libc: signal.h bsd_signal namespace
2918 [21455] network: Network headers stdint.h namespace
2919 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2921 [21475] network: resolv: Overlong search path is truncated mid-label
2922 [21511] libc: sigstack namespace
2923 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2924 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2925 bits/syscall.h: No such file or directory
2926 [21517] libc: struct sigaltstack namespace
2927 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2928 [21533] localedata: Update locale data to Unicode 10.0
2930 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2931 junk at end of line, first unrecognized character is `@'
2932 [21538] libc: SIG_HOLD missing for XPG4
2933 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2934 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2935 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2936 [21543] libc: sigevent namespace
2937 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2938 size for general purpose registers in mcontext_t structure
2939 [21550] libc: sigwait namespace
2940 [21552] libc: XPG4 bsd_signal namespace
2941 [21554] libc: sigpause namespace
2942 [21560] libc: sys/wait.h signal.h namespace
2943 [21561] libc: waitid namespace
2944 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2945 '/usr/include/stdlib.h': Permission denied
2946 [21575] libc: sys/wait.h missing struct rusage definition
2947 [21584] libc: sigaltstack etc namespace
2948 [21597] libc: siginterrupt namespace
2949 [21607] math: hppa: FAIL: math/test-tgmath
2950 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2952 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2953 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2954 stack and heap (CVE-2017-1000366)
2955 [21625] libc: wait3 namespace
2956 [21654] nss: Incorrect pointer alignment in NSS group merge result
2958 [21657] network: Parse interface zone id for node-local multicast
2959 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2961 [21666] libc: .symver is used on common symbol
2962 [21668] network: resolv: res_init cross-thread broadcast introduces race
2964 [21687] math: tgmath.h totalorder, totalordermag return type
2965 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2967 [21696] libc: Incorrect assumption of of __cpu_mask in
2968 posix/sched_cpucount.c
2969 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2970 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2972 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2973 leading to relocation crash
2974 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2975 `resolv_conf_matches (resp, conf)' failed.
2976 [21710] localedata: Added Samoan language locale for Samoa
2977 [21711] localedata: Pashto yesstr/nostr locale are missing
2978 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2979 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
2980 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2981 [21723] localedata: yesstr/nostr missing for Chinese language locale
2982 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2984 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2986 [21728] localedata: New Locale for Tongan language
2987 [21729] localedata: incorrect LC_NAME fields for hi_IN
2988 [21733] localedata: yesstr and nostr are missing for zh_HK
2989 [21734] localedata: Missing yesstr and nostr are for kw_GB
2990 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2991 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2992 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2993 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2995 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2997 [21749] localedata: Wrong abbreviated day name (“abday”) for
2999 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
3000 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
3001 [21759] localedata: missing yesstr and nostr for Tigrinya
3002 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
3003 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
3004 [21767] localedata: Missing Bislama locales
3005 [21768] localedata: Missing yesstr and nostr for aa_ET
3006 [21770] localedata: Missing Field in li_NL
3007 [21778] nptl: Robust mutex may deadlock
3008 [21779] libc: MicroBlaze segfaults when loading libpthread
3009 [21783] localedata: Fix int_select international_call_prefixes
3010 [21784] localedata: Inconsistency in country_isbn
3011 [21788] localedata: Missing Country Postal Abbreviations
3012 [21794] localedata: Added-country_isbn-for-Italy
3013 [21795] localedata: Add/Fix country_isbn for France
3014 [21796] localedata: Added country_isbn for Republic of Korea
3015 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
3016 [21799] localedata: Added int_select international_call_prefixes
3017 [21801] localedata: Added int_select international_call_prefixes
3018 [21804] nptl: Double semicolon in thread-shared-types.h
3019 [21807] localedata: LC_ADDRESS fix for pap_CW
3020 [21808] localedata: Fix LC_ADDRESS for pap_AW
3021 [21821] localedata: Added country_name in mai_IN
3022 [21822] localedata: Fix LC_TIME for mai_IN
3023 [21823] localedata: missing yesstr, nostr for sa_IN
3024 [21825] localedata: Fix name_mrs for mag_IN
3025 [21828] localedata: 2.26 changelog should mention user visible changes
3027 [21835] localedata: Added Maithili language locale for Nepal
3028 [21838] localedata: Removed redundant data for the_NP
3029 [21839] localedata: Fix LC_MONETARY for ta_LK
3030 [21844] localedata: Fix Latin characters and Months Sequence.
3031 [21848] localedata: Fix mai_NP Title Name
3036 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
3037 24731-2:2010, is supported to enable declarations of functions from that
3038 TR. Note that not all functions from that TR are supported by the GNU C
3041 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
3042 18661-1:2014, is supported to enable declarations of functions and macros
3043 from that TS. Note that not all features from that TS are supported by
3046 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
3047 18661-4:2015, is supported to enable declarations of functions and macros
3048 from that TS. Note that most features from that TS are not supported by
3051 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
3052 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
3053 Since the GNU C Library defaults to a much newer revision of POSIX, this
3054 will only affect programs that specifically request an old conformance
3055 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
3056 see a change in the visible declarations, but a program compiled with
3057 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
3060 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
3061 defined by all multithreaded code, but glibc has not required this for
3064 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
3065 means that in a future release, the macros “major”, “minor”, and “makedev”
3066 will only be available from <sys/sysmacros.h>.
3068 These macros are not part of POSIX nor XSI, and their names frequently
3069 collide with user code; see for instance glibc bug 19239 and Red Hat bug
3070 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
3071 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
3074 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
3075 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
3076 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
3078 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
3079 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
3080 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
3081 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
3082 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
3083 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
3084 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
3085 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
3086 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
3087 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
3088 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
3091 * New <math.h> features are added from TS 18661-1:2014:
3093 - Signaling NaN macros: SNANF, SNAN, SNANL.
3095 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
3096 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
3097 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
3099 - llogb functions: the llogb, llogbf and llogbl functions, and the
3100 FP_LLOGB0 and FP_LLOGBNAN macros.
3102 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
3105 - Comparison macros: iseqsig.
3107 - Classification macros: iscanonical, issubnormal, iszero.
3109 - Total order functions: totalorder, totalorderf, totalorderl,
3110 totalordermag, totalordermagf, totalordermagl.
3112 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
3114 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
3115 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
3117 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
3118 are added to libc. They convert a floating-point number into string.
3120 * Most of glibc can now be built with the stack smashing protector enabled.
3121 It is recommended to build glibc with --enable-stack-protector=strong.
3122 Implemented by Nick Alcock (Oracle).
3124 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
3125 intended to be used instead of memset() to erase sensitive data after use;
3126 the compiler will not optimize out calls to explicit_bzero even if they
3127 are "unnecessary" (in the sense that no _correct_ program can observe the
3128 effects of the memory clear).
3130 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
3131 to float instead of double. This does not affect the ABI of any libraries
3132 that are part of the GNU C Library, but may affect the ABI of other
3133 libraries that use this type in their interfaces.
3135 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
3136 float_t and double_t types are now defined to long double instead of float
3137 and double. These options are not the default, and this does not affect
3138 the ABI of any libraries that are part of the GNU C Library, but it may
3139 affect the ABI of other libraries that use this type in their interfaces,
3140 if they are compiled or used with those options.
3142 * The getentropy and getrandom functions, and the <sys/random.h> header file
3145 * The buffer size for byte-oriented stdio streams is now limited to 8192
3146 bytes by default. Previously, on Linux, the default buffer size on most
3147 file systems was 4096 bytes (and thus remains unchanged), except on
3148 network file systems, where the buffer size was unpredictable and could be
3149 as large as several megabytes.
3151 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
3152 for the Linux quota interface which predates kernel version 2.4.22 has
3155 * The malloc_get_state and malloc_set_state functions have been removed.
3156 Already-existing binaries that dynamically link to these functions will
3157 get a hidden implementation in which malloc_get_state is a stub. As far
3158 as we know, these functions are used only by GNU Emacs and this change
3159 will not adversely affect already-built Emacs executables. Any undumped
3160 Emacs executables, which normally exist only during an Emacs build, should
3161 be rebuilt by re-running “./configure; make” in the Emacs build tree.
3163 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
3164 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
3165 “no-ip6-dotint” had already been the default, and support for the
3166 “ip6-dotint” option was removed from the Internet in 2006.
3168 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
3169 flag from <resolv.h> have been removed. The option relied on a
3170 backwards-incompatible DNS extension which was never deployed on the
3173 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
3174 RES_BLAST defined in the <resolv.h> header file have been deprecated.
3175 They were already unimplemented.
3177 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
3178 _res.flags are deprecated. The flag was standardized in RFC 2133, but
3179 removed again from the IETF name lookup interface specification in RFC
3180 2553. Applications should use getaddrinfo instead.
3182 * DNSSEC-related declarations and definitions have been removed from the
3183 <arpa/nameser.h> header file, and libresolv will no longer attempt to
3184 decode the data part of DNSSEC record types. Previous versions of glibc
3185 only implemented minimal support for the previous version of DNSSEC, which
3186 is incompatible with the currently deployed version.
3188 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
3189 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
3190 <arpa/nameser.h> header file because the distinction between RR types and
3191 meta-RR types is not officially standardized, subject to revision, and
3192 thus not suitable for encoding in a macro.
3194 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
3195 and rhook members of the res_state type in <resolv.h> have been removed.
3196 The glibc stub resolver did not support these hooks, but the header file
3197 did not reflect that.
3199 * For multi-arch support it is recommended to use a GCC which has
3200 been built with support for GNU indirect functions. This ensures
3201 that correct debugging information is generated for functions
3202 selected by IFUNC resolvers. This support can either be enabled by
3203 configuring GCC with '--enable-gnu-indirect-function', or by
3204 enabling it by default by setting 'default_gnu_indirect_function'
3205 variable for a particular architecture in the GCC source file
3208 * GDB pretty printers have been added for mutex and condition variable
3209 structures in POSIX Threads. When installed and loaded in gdb these pretty
3210 printers show various pthread variables in human-readable form when read
3211 using the 'print' or 'display' commands in gdb.
3213 * Tunables feature added to allow tweaking of the runtime for an application
3214 program. This feature can be enabled with the '--enable-tunables' configure
3215 flag. The GNU C Library manual has details on usage and README.tunables has
3216 instructions on adding new tunables to the library.
3218 * A new version of condition variables functions have been implemented in
3219 the NPTL implementation of POSIX Threads to provide stronger ordering
3222 * A new version of pthread_rwlock functions have been implemented to use a more
3223 scalable algorithm primarily through not using a critical section anymore to
3226 Security related changes:
3228 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
3229 have been created with makecontext could fail to terminate due to a
3230 missing .cantunwind annotation. This has been observed to lead to a hang
3231 (denial of service) in some Go applications compiled with gccgo. Reported
3232 by Andreas Schwab. (CVE-2016-6323)
3234 * The DNS stub resolver functions would crash due to a NULL pointer
3235 dereference when processing a query with a valid DNS question type which
3236 was used internally in the implementation. The stub resolver now uses a
3237 question type which is outside the range of valid question type values.
3240 The following bugs are resolved with this release:
3242 [4099] stdio: Overly aggressive caching by stream i/o functions.
3243 [7065] build: Support building glibc with -fstack-protector or -fstack-
3245 [9842] localedata: en_CA: incorrect date format
3246 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
3247 before it started waiting
3248 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
3249 [15765] nptl: sem_open is wrongly a cancellation point
3250 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
3251 [16458] libc: endian.h and netinet/in.h byte order macros return values of
3253 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
3254 library linked with pthread
3255 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
3256 "FIXME: Ingo" issue)
3257 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
3258 [17252] libc: getrandom and getentropy syscall
3259 [17730] malloc: thread-local storage is sometimes improperly free()'d
3260 after being __libc_memalign()'d
3261 [18241] stdio: failed fseek on memstream does not set errno and can fail
3263 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
3265 [18463] nptl: pthread_cond_broadcast issue when surrounded by
3266 PTHREAD_PRIO_INHERIT mutex on ARM
3267 [18784] network: res_query and related function crash for special record
3268 type queries (CVE-2015-5180)
3269 [19380] math: strtod does not raise "inexact"
3270 [19387] string: Integer overflow in memchr
3271 [19390] string: Integer overflow in strncat
3272 [19398] build: linknamespace tests fail with massively parallel build
3273 [19402] nptl: Deadlock with robust shared mutex and asynchronous
3275 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
3276 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
3277 [19514] libc: [PATCH] Fix spelling errors in spelling
3278 "implement"/"implementation" in several places
3279 [19582] network: Deprecate RES_USE_INET6
3280 [19673] manual: clog10 docs appear to be erroneous
3281 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
3282 causes a segmentation fault
3283 [19826] libc: invalid pointer returned from __tls_get_addr with static
3285 [20016] network: resolv: Remove hooks support from the API
3286 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
3288 [20033] math: [x86_64] vectorized math function don't call the __finite
3290 [20116] nptl: use after free in pthread_create
3291 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
3292 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
3294 [20311] nptl: please install proc_service.h
3295 [20366] libc: Compilation errors in installed headers in strict-compliance
3297 [20370] malloc: malloc: Arena free list management is still racy
3298 (incorrect fix in bug 19243)
3299 [20386] libc: assert (X = 0) does not result in GCC warning
3300 [20432] malloc: malloc: Minimize interface required for interposition
3301 [20435] libc: Missing unwind info in __startcontext causes infinite loop
3302 in _Unwind_Backtrace (CVE-2016-6323)
3303 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
3304 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
3306 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
3307 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
3308 [20477] network: resolv: incorrect double-checked locking related to
3310 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
3312 [20495] math: x86_64 performance degradation due to AVX/SSE transition
3314 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
3315 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
3316 cause transition penalty
3317 [20517] math: sparcv9 missing fdiml compat symbol
3318 [20524] manual: strverscmp is inconsistent
3319 [20525] libc: <sys/quota.h> should be based on kernel headers
3320 [20539] math: GCC 7 -static -lm fails to link at -O3
3321 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
3323 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
3325 [20591] network: Remove obsolete DNSSEC support
3326 [20592] network: DNS resource record type classification macros in
3327 <arpa/nameser.h> are incorrect
3328 [20593] network: Update DNS RR type definitions
3329 [20611] network: getaddrinfo accepts invalid numeric scope IDs
3330 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
3332 [20629] network: libresolv: Remove support for bitstring labels
3334 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
3335 assertion: "maxidx >= 2"
3336 [20660] math: [arm] Use VSQRT
3337 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
3338 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
3339 [20689] libc: Test for FMA should also check for AVX.
3340 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
3341 [20715] math: iszero macro breaks existing code
3342 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
3343 [20728] libc: powerpc: Missing TOC stub in clone
3344 [20729] build: glibc-2.24 fails to build for i486 with -Os
3345 [20750] build: Build fails with default PIE enabled gcc-6.x
3346 [20768] math: [alpha] sqrt fegetenv namespace
3347 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
3349 [20787] math: float_t is defined as float incorrectly on x86_64 even if
3350 __FLT_EVAL_METHOD__ is 2
3351 [20790] network: rpcgen buffer overrun in get_prog_declaration
3352 [20822] nptl: race condition in __lll_unlock_elision on powerpc
3353 [20829] libc: crypt snprintf namespace
3354 [20847] libc: tst-vfork3 failure
3355 [20855] math: Default bits/mathdef.h has inappropriate float_t
3356 [20859] math: [sh4] FP_ILOGB0 invalid
3357 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
3358 U+20AC), not same as GBK
3359 [20915] dynamic-link: global-dynamic TLS broken on aarch64
3360 [20916] math: pow handling of sNaN arguments
3361 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
3362 [20919] math: Bad pow (qNaN, 0) result with -lieee
3363 [20940] math: hypot sNaN handling
3364 [20947] math: fmax, fmin sNaN handling
3365 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
3366 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
3368 [20971] string: powerpc64/power7 memchr overflows internal pointer check
3369 [20973] nptl: robust mutexes: Lost wake-ups
3370 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
3371 [20978] nis: strlen on null pointer in nss_nisplus
3372 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
3374 [21014] string: i686 memchr overflows internal pointer check
3375 [21019] libc: [mips] n32 lseek incorrect on overflow
3376 [21022] libc: [microblaze] __backtrace get_frame_size namespace
3377 [21026] libc: [MIPS] readahead syscall is broken on n64
3378 [21028] math: Fallback fesetexceptflag should always succeed
3379 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
3380 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
3382 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
3383 [21061] librt: [microblaze] librt lost clock_* exports
3384 [21073] libc: tunables: insecure environment variables passed to
3385 subprocesses with AT_SECURE
3386 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
3390 * The minimum Linux kernel version that this version of the GNU C Library
3391 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
3392 kernel version 2.6.32 or later suffices (on architectures that already
3393 required kernel versions more recent than 3.2, those requirements remain
3394 unchanged). Linux 3.2 or later kernel headers are required on all
3397 * The pap_AN locale has been deleted. This has been deprecated for a long
3398 time. It has been replaced by pap_AW & pap_CW, both of which have long
3399 been included in previous releases.
3401 * The readdir_r and readdir64_r functions have been deprecated. It is
3402 recommended to use readdir and readdir64 instead.
3404 * The type “union wait” has been removed. It was deprecated in the early
3405 1990s and never part of POSIX. Application code should use the int type
3406 instead of “union wait”.
3408 * A new NSS action is added to facilitate large distributed system
3409 administration. The action, MERGE, allows remote user stores like LDAP
3410 to be merged into local user stores like /etc/groups in order to provide
3411 easy to use, updated, and managed sets of merged credentials. The new
3412 action can be used by configuring it in /etc/nsswitch.conf:
3413 group: files [SUCCESS=merge] nis
3414 Implemented by Stephen Gallagher (Red Hat).
3416 * The deprecated __malloc_initialize_hook variable has been removed from the
3419 * The long unused localedef --old-style option has been removed. It hasn't
3420 done anything in over 16 years. Scripts using this option can safely
3423 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
3424 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
3425 return the next representable value in the direction of positive infinity
3426 and the nextdown functions return the next representable value in the
3427 direction of negative infinity. These are currently enabled as GNU
3430 Security related changes:
3432 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
3433 could result in a stack overflow when getnetbyname was called with an
3434 overly long name. (CVE-2016-3075)
3436 * Previously, getaddrinfo copied large amounts of address data to the stack,
3437 even after the fix for CVE-2013-4458 has been applied, potentially
3438 resulting in a stack overflow. getaddrinfo now uses a heap allocation
3439 instead. Reported by Michael Petlan. (CVE-2016-3706)
3441 * The glob function suffered from a stack-based buffer overflow when it was
3442 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
3443 Reported by Alexander Cherepanov. (CVE-2016-1234)
3445 * The Sun RPC UDP client could exhaust all available stack space when
3446 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
3447 alloca plugin for GCC. (CVE-2016-4429)
3449 * The IPv6 name server management code in libresolv could result in a memory
3450 leak for each thread which is created, performs a failing naming lookup,
3451 and exits. Over time, this could result in a denial of service due to
3452 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
3454 The following bugs are resolved with this release:
3456 [1170] localedata: ne_NP: update Nepali locale definition file
3457 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
3459 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
3460 [6796] math: fdim() does not set errno on overflow
3461 [10354] libc: posix_spawn should use vfork() in more cases than presently
3462 [11213] localedata: localedata: add copyright disclaimer to locale files
3463 [12143] localedata: chr_US: new Cherokee locale
3464 [12450] localedata: sgs_LT: new locale
3465 [12676] localedata: ln_CD: new locale
3466 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
3468 [13304] math: fma, fmaf, fmal produce wrong results
3469 [14259] build: --localedir arg to configure is ignored
3470 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
3471 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
3472 [14934] localedata: es_CL: wrong first weekday chilean locale
3473 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
3475 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
3477 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
3478 [15368] nptl: raise() is not async-signal-safe
3479 [15479] math: ceil, floor, round and trunc raise inexact exception
3480 [15578] localedata: kk_KZ: various updates
3481 [16003] localedata: pap_AN: punt old locale
3482 [16137] localedata: iw_IL: punt old locale
3483 [16190] localedata: eo: new esperanto locale
3484 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
3485 [16742] malloc: race condition: pthread_atfork() called before first
3486 malloc() results in unexpected locking behaviour/deadlocks
3487 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
3489 [16983] localedata: postal_fmt does not allow %l and %n modifiers
3490 [17565] localedata: pt_PT: wrong (work-)week start
3491 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
3492 [17950] build: Build fails with -msse
3493 [18205] localedata: be_BY*: wrong first_weekday and first_workday
3494 [18433] libc: posix_spawn does not return correctly upon failure to
3496 [18453] localedata: charmaps/IBM875: incorrect codes
3497 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
3499 [18896] localedata: he_IL: improvements for currency
3500 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
3501 Romanian locale data
3502 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
3504 [19056] libc: Deprecate readdir_r
3505 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
3507 [19198] localedata: nl_NL: small improvements for Dutch locales
3508 [19257] network: Per-thread memory leak in __res_vinit with IPv6
3509 nameservers (CVE-2016-5417)
3510 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
3512 [19400] locale: Language missing in "iso-639.def", trivial fix in
3514 [19431] malloc: Deadlock between fflush, getdelim, and fork
3515 [19505] libc: Incorrect file descriptor validity checks in
3516 posix_spawn_file_actions_add{open,close,dup2}
3517 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
3518 when using RTLD_NEXT
3519 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
3520 `intl/{gettextP,loadinfo}.h'
3521 [19534] libc: execle, execlp may use malloc
3522 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
3523 [19573] network: res_nclose and __res_maybe_init disagree about name
3524 server initialization, breaking Hesiod
3525 [19575] localedata: Status of GB18030 tables
3526 [19581] localedata: sr_* date_fmt string contains additional newline
3527 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
3529 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
3530 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
3531 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
3532 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
3534 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
3536 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
3538 [19610] dynamic-link: ldconfig -X removes stale symbolic links
3539 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
3540 [19633] locale: strfmon_l applies global locale to number formatting
3541 [19642] network: Memory leak in getnameinfo
3542 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
3543 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
3545 [19654] math: [x86_64] Need testcase for BZ #19590 fix
3546 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
3548 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
3549 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
3551 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
3553 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
3555 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
3556 pointers and lengths in error-case.
3557 [19727] locale: Converting from/to UTF-xx with iconv() does not always
3558 report errors on UTF-16 surrogates values.
3559 [19755] nscd: nscd assertion failure in gc
3560 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
3561 [19759] libc: mempcpy shouldn't be inlined
3562 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
3563 [19765] libc: s390 needs an optimized mempcpy
3564 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
3565 NAME_MAX limit assumption (CVE-2016-1234)
3566 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
3567 [19787] network: Missing and incorrect truncation checks in getnameinfo
3568 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
3570 [19791] network: Assertion failure in res_query.c with un-connectable name
3572 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
3573 [19822] math: libm.so install clobbers old version
3574 [19825] network: resolv: send_vc can return uninitialized data in second
3575 response to getaddrinfo
3576 [19830] network: nss_dns: should check RDATA length against buffer length
3577 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
3578 confronted with A/AAAA records of invalid size
3579 [19837] nss: nss_db: No retries for some long lines with a larger buffer
3580 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
3581 [19853] stdio: Printing IBM long double in decimal with high precision is
3583 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
3584 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
3585 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
3587 [19865] network: Assertion failure or memory leak in
3588 _nss_dns_getcanonname_r
3589 [19868] network: nss_dns: netent code does not skip over non-PTR records
3590 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
3592 [19881] string: Improve x86-64 memset
3593 [19907] string: Incorrect memcpy tests
3594 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
3596 [19925] libc: termios.h XCASE namespace
3597 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
3598 [19929] libc: limits.h NL_NMAX namespace
3599 [19931] stdio: Memory leak in vfprintf
3600 [19957] libc: clone(CLONE_VM) access invalid parent memory
3601 [19963] localedata: en_IL: New locale
3602 [19989] stdio: stdio.h cuserid namespace
3603 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
3605 [19996] locale: langinfo.h nl_langinfo_l namespace
3606 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
3607 [20010] network: getaddrinfo: Stack overflow in hostent translation
3609 [20012] stdio: libio: fmemopen append mode failure
3610 [20014] stdio: stdio.h namespace for pre-threads POSIX
3611 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
3612 [20023] libc: fcntl.h timespec namespace
3613 [20024] math: [x86_64] vectorized sincos trashes the stack
3614 [20031] network: nss_hesiod: Heap overflow in get_txt_records
3615 [20041] time: sys/time.h timespec namespace
3616 [20043] libc: unistd.h missing cuserid for UNIX98 and before
3617 [20044] libc: unistd.h missing pthread_atfork for UNIX98
3618 [20051] libc: ttyslot in wrong header under wrong conditions
3619 [20054] libc: gethostname not declared for XPG4
3620 [20055] libc: termios.h missing tcgetsid for XPG4
3621 [20072] dynamic-link: x86 init_cpu_features is called twice in static
3623 [20073] libc: sys/stat.h fchmod namespace
3624 [20074] libc: stdlib.h rand_r namespace
3625 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
3626 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
3628 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
3629 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
3631 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
3632 [20119] libc: Wrong mask for processors level type from CPUID
3633 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
3634 AS not supporting AVX512
3635 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
3637 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
3638 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
3640 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
3641 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
3642 [20178] libc: posix_spawn{p} should not call exit
3643 [20191] stdio: libio: vtables hardening
3644 [20195] string: FMA4 detection requires CPUID execution with register
3646 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
3647 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
3649 [20212] math: acos (sNaN) returns sNaN
3650 [20213] math: asin (sNaN) returns sNaN
3651 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
3652 [20218] math: [i386] asinhl (sNaN) returns sNaN
3653 [20219] math: [i386] atanhl (sNaN) returns sNaN
3654 [20222] stdio: fopencookie: Mangle function pointers
3655 [20224] math: [i386] cbrtl (sNaN) returns sNaN
3656 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
3657 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
3659 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
3660 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
3661 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
3662 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
3663 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
3664 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
3665 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
3666 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
3667 [20240] math: modf (sNaN) returns sNaN
3668 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
3669 [20250] math: frexp (sNaN) returns sNaN
3670 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
3671 [20255] math: [i386] fdim, fdimf return with excess range and precision /
3673 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
3674 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
3675 subscript is below array bounds [-Werror=array-bounds]
3676 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
3677 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
3679 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
3680 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
3682 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
3683 "invalid" exceptions
3684 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
3685 [20316] localedata: id_ID: Februari instead of Pebruari
3686 [20327] string: POWER8 strcasecmp returns incorrect result
3687 [20347] math: Failure: Test: j0_downward (0xap+0)
3688 [20348] libc: FAIL: misc/tst-preadvwritev64
3689 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
3690 [20350] libc: There is no test for p{read,write}64
3691 [20357] math: Incorrect cos result for 1.5174239687223976
3692 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
3696 * Unicode 8.0.0 Support: Character encoding, character type info, and
3697 transliteration tables are all updated to Unicode 8.0.0, using new
3698 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
3699 These updates cause user visible changes, such as the fixes for bugs
3700 89, 16061, and 18568.
3702 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
3703 kernel-internal CPU set size. This means that requests that change the
3704 CPU affinity which failed before (for example, an all-ones CPU mask) will
3705 now succeed. Applications that need to determine the effective CPU
3706 affinities need to call sched_getaffinity or pthread_getaffinity_np after
3707 setting it because the kernel can adjust it (and the previous size check
3708 would not detect this in the majority of cases).
3710 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
3711 the following new symbols are used: fts64_children, fts64_close,
3712 fts64_open, fts64_read and fts64_set.
3714 * getaddrinfo now detects certain invalid responses on an internal netlink
3715 socket. If such responses are received, an affected process will
3716 terminate with an error message of "Unexpected error <number> on netlink
3717 descriptor <number>" or "Unexpected netlink response of size <number> on
3718 descriptor <number>". The most likely cause for these errors is a
3719 multi-threaded application which erroneously closes and reuses the netlink
3720 file descriptor while it is used by getaddrinfo.
3722 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
3723 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
3724 unnecessary serialization of memory allocation requests across threads.
3725 The defect is now corrected. Users should see a substantial increase in
3726 the concurent throughput of allocation requests for applications which
3727 trigger this bug. Affected applications typically create and
3728 destroy threads frequently. (Bug 19048 was reported and analyzed by
3731 * There is now a --disable-timezone-tools configure option for disabling the
3732 building and installing of the timezone related utilities (zic, zdump, and
3733 tzselect). This is useful for people who build the timezone data and code
3734 independent of the GNU C Library.
3736 * The obsolete header <regexp.h> has been removed. Programs that require
3737 this header must be updated to use <regex.h> instead.
3739 * The obsolete functions bdflush, create_module, get_kernel_syms,
3740 query_module and uselib are no longer available to newly linked binaries;
3741 the header <sys/kdaemon.h> has been removed. These functions and header
3742 were specific to systems using the Linux kernel and could not usefully be
3743 used with the GNU C Library on systems with version 2.6 or later of the
3746 * Optimized string, wcsmbs and memory functions for IBM z13.
3747 Implemented by Stefan Liebler.
3749 * Newly linked programs that define a variable called signgam will no longer
3750 have it set by the lgamma, lgammaf and lgammal functions. Programs that
3751 require signgam to be set by those functions must ensure that they use the
3752 variable provided by the GNU C Library and declared in <math.h>, without
3753 defining their own copy.
3755 * The minimum GCC version that can be used to build this version of the GNU
3756 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
3757 still be used to compile programs using the GNU C Library.
3759 Security related changes:
3761 * An out-of-bounds value in a broken-out struct tm argument to strftime no
3762 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
3764 * The LD_POINTER_GUARD environment variable can no longer be used to disable
3765 the pointer guard feature. It is always enabled. Previously,
3766 LD_POINTER_GUARD could be used to disable security hardening in binaries
3767 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
3770 * An integer overflow in hcreate and hcreate_r could lead to an
3771 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
3773 * The catopen function no longer has unbounded stack usage. Reported by
3774 Max. (CVE-2015-8779)
3776 * The nan, nanf and nanl functions no longer have unbounded stack usage
3777 depending on the length of the string passed as an argument to the
3778 functions. Reported by Joseph Myers. (CVE-2014-9761)
3780 * A stack-based buffer overflow was found in libresolv when invoked from
3781 libnss_dns, allowing specially crafted DNS responses to seize control
3782 of execution flow in the DNS client. The buffer overflow occurs in
3783 the functions send_dg (send datagram) and send_vc (send TCP) for the
3784 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
3785 family. The use of AF_UNSPEC triggers the low-level resolver code to
3786 send out two parallel queries for A and AAAA. A mismanagement of the
3787 buffers used for those queries could result in the response of a query
3788 writing beyond the alloca allocated buffer created by
3789 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
3790 the overflow. Thanks to the Google Security Team and Red Hat for
3791 reporting the security impact of this issue, and Robert Holiday of
3792 Ciena for reporting the related bug 18665. (CVE-2015-7547)
3794 The following bugs are resolved with this release:
3796 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
3797 [887] math: Math library function "logb" and "nextafter" inconsistent
3798 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
3799 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
3800 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
3801 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
3803 [4404] localedata: German translation of "Alarm clock" is misleading
3804 [6799] math: nextafter() and nexttoward() doen't set errno on
3805 overflow/underflow errors
3806 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3808 [10432] nis: _nss_nis_setnetgrent assertion failure
3809 [11460] libc: fts has no LFS support
3810 [12926] network: getaddrinfo()/make_request() may spin forever
3811 [13065] nptl: Race condition in pthread barriers
3812 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3813 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3815 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3816 [14912] libc: Rename non-installed bits/*.h headers
3817 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3818 [15367] math: Let gcc use __builtin_isinf
3819 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3820 [15421] math: lgamma wrongly sets signgam for ISO C
3821 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3822 FE_INVALID with argument out of range
3823 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3825 [15786] dynamic-link: ifunc resolver functions can smash function
3827 [15918] math: Unnecessary check for equality in hypotf()
3828 [16061] localedata: Review / update transliteration data
3829 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3831 [16141] time: strptime %z offset restriction
3832 [16171] math: drem should be alias of remainder
3833 [16296] math: fegetround is pure?
3834 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3835 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3837 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3838 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3840 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3841 "Exception "Inexact" set" on ppc32
3842 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3843 [16517] math: Missing underflow exception from tanf/tan/tanl
3844 [16519] math: Missing underflow exception from sinhf
3845 [16520] math: Missing underflow exception from tanhf
3846 [16521] math: Missing underflow exception from exp2
3847 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3849 [16734] stdio: fopen calls mmap to allocate its buffer
3850 [16961] math: nan function incorrect handling of bad sequences
3851 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3852 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3853 [16985] locale: localedef: confusing error message when opening output
3855 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3856 [17197] locale: Redundant shift character in iconv conversion output at
3858 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3859 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3860 [17250] dynamic-link: static linking breaks nss loading
3861 (getaddrinfo/getpwnam/etc...)
3862 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3864 [17441] math: isnan() should use __builtin_isnan() in GCC
3865 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3866 (related to lock elision)
3867 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3868 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3869 [17887] time: strptime should be able to parse "+01:00" style timezones
3870 [17905] libc: catopen() Multiple unbounded stack allocations
3872 [18084] libc: backtrace (..., 0) dumps core on x86
3873 [18086] libc: nice() sets errno to 0 on success
3874 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3875 is too large (CVE-2015-8778)
3876 [18251] dynamic-link: SONAME missing when audit modules provides path
3877 [18265] libc: add attributes for wchar string and memory functions
3878 [18370] math: csqrt missing underflows
3879 [18421] libc: [hppa] read-only segment has dynamic relocations
3880 [18472] libc: Obsolete syscall wrappers should be compat symbols
3881 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3882 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3883 [18525] localedata: Remove locale timezone information
3884 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3885 [18568] localedata: Update locale data to Unicode 8.0
3886 [18589] locale: sort-test.sh fails at random
3887 [18595] math: ctan, ctanh missing underflows
3888 [18604] libc: assert macro-expands its argument
3889 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3890 contains a vector instruction exception.
3891 [18611] math: j1, jn missing errno setting on underflow
3892 [18618] localedata: sync Chechen locale definitions with other *_RU
3894 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3895 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3896 [18665] network: In send_dg, the recvfrom function is NOT always using the
3897 buffer size of a newly created buffer (CVE-2015-7547)
3898 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3900 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3902 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3903 [18699] math: tilegx cproj() for various complex infinities does not yield
3905 [18724] libc: Harden put*ent functions against data injection
3906 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3907 [18755] build: build errors with -DNDEBUG
3908 [18757] stdio: fmemopen fails to set errno on failure
3909 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3911 [18781] libc: openat64 lacks O_LARGEFILE
3912 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3913 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3914 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3915 [18790] math: [ldbl-128ibm] tanhl inaccurate
3916 [18795] libc: stpncpy fortification misses buffer lengths that are
3917 statically too large
3918 [18796] build: build fails for --disable-mathvec
3919 [18803] math: hypot missing underflows
3920 [18820] stdio: fmemopen may leak memory on failure
3921 [18823] math: csqrt spurious underflows
3922 [18824] math: fma spurious underflows
3923 [18825] math: pow missing underflows
3924 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3925 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3926 [18870] build: sem_open.c fails to compile with missing symbol
3928 [18872] stdio: Fix memory leak in printf_positional
3929 [18873] libc: posix_fallocate overflow check ineffective
3930 [18875] math: Excess precision leads incorrect libm
3931 [18877] libc: arm: mmap offset regression
3932 [18887] libc: memory corruption when using getmntent on blank lines
3933 [18918] localedata: hu_HU: change time to HH:MM:SS format
3934 [18921] libc: Regression: extraneous stat() and fstat() performed by
3936 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3937 binaries (CVE-2015-8777)
3938 [18951] math: tgamma missing underflows
3939 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3941 [18953] localedata: lt_LT: change currency symbol to the euro
3942 [18956] math: powf inaccuracy
3943 [18961] math: [i386] exp missing underflows
3944 [18966] math: [i386] exp10 missing underflows
3945 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3946 [18969] build: multiple string test failures due to missing locale
3948 [18970] libc: Reference of pthread_setcancelstate in libc.a
3949 [18977] math: float / long double Bessel functions not in XSI POSIX
3950 [18980] math: i386 libm functions return with excess range and precision
3951 [18981] math: i386 scalb*, ldexp return with excess range and precision
3952 [18982] stdio: va_list and vprintf
3953 [18985] time: Passing out of range data to strftime() causes a segfault
3955 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3956 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3957 [19012] locale: iconv_open leaks memory on error path
3958 [19016] math: clog, clog10 inaccuracy
3959 [19018] nptl: Mangle function pointers in tls_dtor_list
3960 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3961 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3962 [19048] malloc: malloc: arena free list can become cyclic, increasing
3964 [19049] math: [powerpc] erfc incorrect zero sign
3965 [19050] math: [powerpc] log* incorrect zero sign
3966 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3967 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3968 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3969 [19074] network: Data race in _res_hconf_reorder_addrs
3970 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3971 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3972 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3974 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3976 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3977 [19086] manual: posix_fallocate64 documented argument order is wrong.
3978 [19088] math: lround, llround missing exceptions close to overflow
3980 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3981 [19095] math: dbl-64 lrint incorrect for 64-bit long
3982 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3983 [19124] dynamic-link: ld.so failed to build with older assmebler
3984 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3985 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3986 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3987 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3988 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3989 pthread_setaffinity_np
3990 [19156] math: [ldbl-128] j0l spurious underflows
3991 [19164] nptl: tst-getcpu fails with many possible CPUs
3992 [19168] math: math/test-ildoubl and math/test-ldouble failure
3993 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3994 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3996 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3997 (FE_NOMASK_ENV) do not clear SSE exceptions
3998 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3999 _int_new_arena/reused_arena
4000 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
4001 [19201] math: dbl-64 remainder incorrect sign of zero result
4002 [19205] math: bits/math-finite.h conditions do not match math.h and
4004 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
4005 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
4006 for C99-based standards
4007 [19212] libc: features.h not -Wundef clean
4008 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
4010 [19214] libc: Family and model identification for AMD CPU's are incorrect.
4011 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
4012 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
4014 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
4015 "inexact" exceptions
4016 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
4018 [19242] libc: strtol incorrect in Turkish locales
4019 [19243] malloc: reused_arena can pick an arena on the free list, leading
4020 to an assertion failure and reference count corruption
4021 [19253] time: tzset() ineffective when temporary TZ did not include DST
4023 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
4024 [19270] math: [hppa] Shared libm missing __isnanl
4025 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
4026 MAP_HUGETLB and MAP_STACK defines
4027 [19313] nptl: Wrong __cpu_mask for x32
4028 [19347] libc: grantpt: try to force a specific gid even without pt_chown
4029 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
4030 [19350] math: [ldbl-128ibm] sinhl spurious overflows
4031 [19351] math: [ldbl-128ibm] logl inaccurate near 1
4032 [19363] time: x32: times() return value wrongly truncates/sign extends
4034 [19367] dynamic-link: Improve branch prediction on Silvermont
4035 [19369] network: Default domain name not reset by res_ninit when "search"
4036 / "domain" entry is removed from resolv.conf
4037 [19375] math: powerpc: incorrect results for POWER7 logb with negative
4039 [19385] localedata: bg_BG: time separator should be colon, not comma
4040 [19408] libc: linux personality syscall wrapper may erroneously return an
4041 error on 32-bit architectures
4042 [19415] libc: dladdr returns wrong names on hppa
4043 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
4044 IBM905, IBM907, and IBM909
4045 [19439] math: Unix98 isinf and isnan functions conflict with C++11
4046 [19443] build: build failures with -DDEBUG
4047 [19451] build: Make check fails on test-double-vlen2
4048 [19462] libc: Glibc failed to build with -Os
4049 [19465] math: Wrong code with -Os
4050 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
4052 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
4054 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
4055 [19486] math: S390: Math tests fail with "Exception Inexact set".
4056 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
4057 [19550] libc: [mips] mmap negative offset handling inconsistent with other
4059 [19590] math: Fail to build shared objects that use libmvec.so functions.
4063 * The following bugs are resolved with this release:
4065 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
4066 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
4067 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
4068 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
4069 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
4070 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
4071 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
4072 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
4073 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
4074 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
4075 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
4076 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
4077 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
4078 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
4079 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
4080 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
4081 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
4082 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
4083 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
4084 18657, 18676, 18694, 18696, 18887.
4086 * Cache information can be queried via sysconf() function on s390 e.g. with
4087 _SC_LEVEL1_ICACHE_SIZE as argument.
4089 * A buffer overflow in gethostbyname_r and related functions performing DNS
4090 requests has been fixed. If the NSS functions were called with a
4091 misaligned buffer, the buffer length change due to pointer alignment was
4092 not taken into account. This could result in application crashes or,
4093 potentially arbitrary code execution, using crafted, but syntactically
4094 valid DNS responses. (CVE-2015-1781)
4096 * The time zone file parser has been made more robust against crafted time
4097 zone files, avoiding heap buffer overflows related to the processing of
4098 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
4099 large time zone data files. Overly long time zone specifiers in the TZ
4100 variable no longer result in stack overflows and crashes.
4102 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
4103 for LD and GD on x86 and x86-64, has been implemented. You will need
4104 binutils-2.24 or later to enable this optimization.
4106 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
4107 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
4108 Hat). These updates cause user visible changes, such as the fix for bug
4111 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
4112 and getXXbyYY NSS calls for the same database, causing a denial-of-service
4113 condition in some applications.
4115 * Added vector math library named libmvec with the following vectorized x86_64
4116 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
4118 The library can be disabled with --disable-mathvec. Use of the functions is
4119 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
4120 Shared library libmvec.so is linked in as needed when using -lm (no need to
4121 specify -lmvec explicitly for not static builds).
4122 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
4124 * A new fmemopen implementation has been added with the goal of POSIX
4125 compliance. The new implementation fixes the following long-standing
4126 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
4127 old implementation is still present for use be by existing binaries.
4129 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
4130 releases. It has been fixed to match 2.19 and older, but binaries built
4131 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
4133 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
4134 Contributed by Roland McGrath (Google).
4136 * The header <regexp.h> is deprecated, and will be removed in a future
4137 release. Use of this header will trigger a deprecation warning.
4138 Application developers should update their code to use <regex.h> instead.
4140 This header was formerly part of SUS, but was deprecated in 1994 and
4141 removed from the standard in 2001. Also, the glibc implementation
4142 leaks memory. See BZ#18681 for more details.
4146 * The following bugs are resolved with this release:
4148 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
4149 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
4150 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
4151 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
4152 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
4153 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
4154 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
4155 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
4156 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
4157 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
4160 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
4161 too little memory for the to-be-scanned arguments and overflow the
4162 allocated buffer. The implementation now correctly computes the required
4163 buffer size when using malloc, and switches to malloc from alloca as
4166 * A new semaphore algorithm has been implemented in generic C code for all
4167 machines. Previous custom assembly implementations of semaphore were
4168 difficult to reason about or ensure that they were safe. The new version
4169 of semaphore supports machines with 64-bit or 32-bit atomic operations.
4170 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
4171 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
4173 * Port to Altera Nios II has been contributed by Mentor Graphics.
4175 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
4176 implementations for powerpc64/powerpc64le.
4177 Implemented by Adhemerval Zanella (IBM).
4179 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
4180 and powerpc64le. This may improve lock scaling of existing programs on
4181 HTM capable systems. The lock elision code is only enabled with
4182 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
4183 powerpc will issue a transaction abort on every syscall to avoid side
4184 effects being visible outside transactions.
4186 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
4187 AArch64. Contributed by ARM Ltd.
4189 * i386 memcpy functions optimized with SSE2 unaligned load/store.
4191 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
4192 under certain input conditions resulting in the execution of a shell for
4193 command substitution when the application did not request it. The
4194 implementation now checks WRDE_NOCMD immediately before executing the
4195 shell and returns the error WRDE_CMDSUB as expected.
4197 * CVE-2012-3406 printf-style functions could run into a stack overflow when
4198 processing format strings with a large number of format specifiers.
4200 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
4201 infinite loop if the DNS response contained a PTR record of an unexpected
4204 * The minimum GCC version that can be used to build this version of the GNU
4205 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
4206 still be used to compile programs using the GNU C Library.
4208 * The GNU C Library is now built with -Werror by default. This can be
4209 disabled by configuring with --disable-werror.
4211 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
4213 * The obsolete sigvec function has been removed. This was the original
4214 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
4215 programs have been using instead for about 25 years. Of course, ABI
4216 compatibility for old binaries using sigvec remains intact.
4218 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
4219 with newer versions of bison.
4221 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
4222 The original MIPS o32 hard-float ABI requires an FPU where double-precision
4223 registers overlay two consecutive single-precision registers. MIPS32R2
4224 introduced a new FPU mode (FR=1) where double-precision registers extend the
4225 corresponding single-precision registers which is incompatible with the
4226 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
4227 require the use of FR=1 making a transition necessary. New o32 ABI
4228 extensions enable users to migrate over time from the original o32 ABI
4229 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
4230 tracks the ABI of any loaded object and verifies that new objects are
4231 compatible. Mode transitions will also be requested as required and
4232 unsupportable objects will be rejected. The ABI checks include both soft and
4233 hard float ABIs for o32, n32 and n64.
4235 GCC 5 with GNU binutils 2.25 onwards:
4236 It is strongly recommended that all o32 system libraries are built using the
4237 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
4238 with the original and all new o32 ABI extensions. Configure a MIPS GCC
4239 compiler using --with-fp-32=xx to set this by default.
4243 * The following bugs are resolved with this release:
4245 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
4246 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
4247 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
4248 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
4249 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
4250 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
4251 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
4252 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
4253 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
4254 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
4255 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
4256 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
4257 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
4258 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
4259 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
4261 * Reverted change of ABI data structures for s390 and s390x:
4262 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
4263 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
4264 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
4265 are preserved pointing straight to the same implementation as the old ones.
4266 Given that, new callers will simply provide a too-big buffer to these
4267 functions. Any applications/libraries out there that embed jmp_buf or
4268 ucontext_t in an ABI-relevant data structure that have already been rebuilt
4269 against 2.19 headers will have to rebuilt again. This is necessary in any
4270 case to revert the breakage in their ABI caused by the glibc change.
4272 * Support for file description locks is added to systems running the
4273 Linux kernel. The standard file locking interfaces are extended to
4274 operate on file descriptions, not file descriptors, via the use of
4275 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
4276 are associated with an open file instead of a process.
4278 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
4280 * The minimum Linux kernel version that this version of the GNU C Library
4281 can be used with is 2.6.32.
4283 * Running the testsuite no longer terminates as soon as a test fails.
4284 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
4285 with PASS or FAIL lines for individual tests. A summary of the results is
4286 printed, including a list of failing lists, and "make check" exits with
4287 error status if there were any unexpected failures. "make check
4288 stop-on-test-failure=y" may be used to keep the old behavior.
4290 * The am33 port, which had not worked for several years, has been removed
4293 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
4294 supported; they now act the same as _DEFAULT_SOURCE (but generate a
4295 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
4296 conflicted with POSIX (support for which was removed in 2.19), the
4297 interfaces those macros enabled remain available when compiling with
4298 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
4299 test macros defined.
4301 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
4303 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
4304 This may improve lock scaling of existing programs on TX capable systems.
4305 The lock elision code is only built with --enable-lock-elision=yes and
4306 then requires a GCC version supporting the TX builtins. With lock elision
4307 default mutexes are elided via __builtin_tbegin, if the cpu supports
4308 transactions. By default lock elision is not enabled and the elision code
4311 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
4312 copy the path argument. This allowed programs to cause posix_spawn to
4313 deference a dangling pointer, or use an unexpected pathname argument if
4314 the string was modified after the posix_spawn_file_actions_addopen
4317 * All supported architectures now use the main glibc sysdeps directory
4318 instead of some being in a separate "ports" directory (which was
4319 distributed separately before glibc 2.17).
4321 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
4322 On configurations that support it (all Linux configurations), it's now
4323 used regardless of the --enable-add-ons switch to configure. It is no
4324 longer possible to build such configurations without pthreads support.
4326 * Locale names, including those obtained from environment variables (LANG
4327 and the LC_* variables), are more tightly checked for proper syntax.
4328 setlocale will now fail (with EINVAL) for locale names that are overly
4329 long, contain slashes without starting with a slash, or contain ".." path
4330 components. (CVE-2014-0475) Previously, some valid locale names were
4331 silently replaced with the "C" locale when running in AT_SECURE mode
4332 (e.g., in a SUID program). This is no longer necessary because of the
4335 * On x86-64, the dynamic linker's lazy-binding support is now compatible
4336 with application code using Intel MPX instructions. (With all previous
4337 versions, the MPX register state could be clobbered when making calls
4338 into or out of a shared library.) Note that while the new dynamic
4339 linker is compatible with all known x86 hardware whether or not it
4340 supports Intel MPX, some x86 instruction-set emulators might fail to
4341 handle the new instruction encodings. This is known to affect Valgrind
4342 versions up through 3.9 (but will be fixed in the forthcoming 3.10
4343 release), and might affect other tools that do instruction emulation.
4345 * Support for loadable gconv transliteration modules has been removed.
4346 The support for transliteration modules has been non-functional for
4347 over a decade, and the removal is prompted by security defects. The
4348 normal gconv conversion modules are still supported. Transliteration
4349 with //TRANSLIT is still possible, and the //IGNORE specifier
4350 continues to be supported. (CVE-2014-5119)
4352 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
4353 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
4354 resulting a denial-of-service security vulnerability in applications which
4355 use functions related to iconv. (CVE-2014-6040)
4359 * The following bugs are resolved with this release:
4361 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
4362 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
4363 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
4364 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
4365 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
4366 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
4367 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
4368 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
4369 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
4370 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
4371 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
4372 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
4373 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
4374 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
4375 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
4376 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
4377 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
4378 16431, 16453, 16474, 16506, 16510, 16529
4380 * Slovenian translations for glibc messages have been contributed by the
4381 Translation Project's Slovenian team of translators.
4383 * The public headers no longer use __unused nor __block. This change is to
4384 support compiling programs that are derived from BSD sources and use
4385 __unused internally, and to support compiling with Clang's -fblock
4386 extension which uses __block.
4388 * CVE-2012-4412 The strcoll implementation caches indices and rules for
4389 large collation sequences to optimize multiple passes. This cache
4390 computation may overflow for large collation sequences and may cause a
4391 stack or buffer overflow. This is now fixed to use a slower algorithm
4392 which does not use a cache if there is an integer overflow.
4394 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
4395 rules for large collation sequences to optimize multiple passes and falls
4396 back to alloca if malloc fails, resulting in a possible stack overflow.
4397 The implementation now falls back to an uncached collation sequence lookup
4400 * CVE-2013-4788 The pointer guard used for pointer mangling was not
4401 initialized for static applications resulting in the security feature
4402 being disabled. The pointer guard is now correctly initialized to a
4403 random value for static applications. Existing static applications need
4404 to be recompiled to take advantage of the fix (bug 15754).
4406 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
4407 to the d_name member of struct dirent, or omit the terminating NUL
4408 character. (Bugzilla #14699).
4410 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
4411 aligned_alloc functions could allocate too few bytes or corrupt the
4412 heap when passed very large allocation size values (Bugzilla #15855,
4415 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
4416 for AF_INET6 has been fixed (Bugzilla #16072).
4418 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
4419 pap_CW, quz_PE, the_NP.
4421 * Substantially revised locales: gd_GB, ht_HT
4423 * The LC_ADDRESS field was updated to support country_car for almost all
4426 * ISO 1427 definitions were updated.
4428 * ISO 3166 definitions were updated.
4430 * The localedef utility now supports --big-endian and --little-endian
4431 command-line options to generate locales for a different system from that
4432 for which the C library was built.
4434 * Binary locale files now only depend on the endianness of the system for
4435 which they are generated and not on other properties of that system. As a
4436 consequence, binary files generated with new localedef may be incompatible
4437 with old versions of the GNU C Library, and binary files generated with
4438 old localedef may be incompatible with this version of the GNU C Library,
4439 in the following circumstances:
4441 + Locale files may be incompatible on m68k systems.
4443 + Locale archive files (but not separate files for individual locales) may
4444 be incompatible on systems where plain "char" is signed.
4446 * The configure option --disable-versioning has been removed. Builds with
4447 --disable-versioning had not worked for several years.
4449 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
4450 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
4452 * SystemTap probes for malloc have been introduced.
4454 * SystemTap probes for slow multiple precision fallback paths of
4455 transcendental functions have been introduced.
4457 * Support for powerpc64le has been added.
4459 * The soft-float powerpc port now supports e500 processors.
4461 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
4463 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
4464 set of header declarations that are enabled by default, even when other
4465 feature test macros or compiler options such as -std=c99 would otherwise
4466 disable some of those declarations.
4468 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
4469 conflict with POSIX. The libbsd-compat library (which was a dummy library
4470 that did nothing) has also been removed.
4472 * Preliminary documentation about Multi-Thread, Async-Signal and
4473 Async-Cancel Safety has been added.
4475 * Change of ABI data structures for s390 and s390x:
4476 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
4477 allow for future hardware extensions. All library functions that accept or
4478 return these structures were versioned in order to provide backwards
4479 compatibility with existing code. However, not all cases can be handled
4480 with interface versioning. If an application embeds either structure into
4481 another structure and that structure is passed to another compilation unit
4482 which expects the newer larger-sized object then any access to the new
4483 fields will result in undefined behaviour. Similarly any access to fields
4484 that were moved by the enlarging of the structures will cause undefined
4485 behaviour. To fix the undefined behaviour all objects that are part of the
4486 final in-memory image must agree on the size of structures, and this may
4487 require recompilation.
4491 * The following bugs are resolved with this release:
4493 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
4494 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
4495 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
4496 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
4497 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
4498 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
4499 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
4500 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
4501 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
4502 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
4503 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
4504 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
4505 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
4508 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
4509 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
4510 Distributions can re-enable building and using pt_chown via the new configure
4511 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
4512 considerable security risks and should only be used if the distribution
4513 understands and accepts the risks.
4515 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
4518 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
4519 fixed (Bugzilla #15330).
4521 * Add support for calling C++11 thread_local object destructors on thread
4522 and program exit. This needs compiler support for offloading C++11
4523 destructor calls to glibc.
4525 * Improved worst case performance of libm functions with double inputs and
4528 * Support for priority inherited mutexes in pthread condition variables on
4529 non-x86 architectures.
4531 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
4533 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
4535 * Optimized string functions for ARM. Implemented by Will Newton and
4538 * Optimized libm functions for SPARC. Implemented by David S. Miller.
4540 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
4543 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
4544 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
4546 * Added a benchmark framework to track performance of functions in glibc.
4548 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
4549 It is based on draft TS 18661 and currently enabled as a GNU extension.
4551 * On Linux, the clock function now uses the clock_gettime system call
4552 for improved precision, rather than old times system call.
4554 * Added support for version-3 tz format files. This is needed when using
4555 the tz database release 2013e or later, and affects a few unusual cases --
4556 currently only TZ='America/Godthab' for time stamps after 2037.
4558 * Added new API functions pthread_getattr_default_np and
4559 pthread_setattr_default_np to get and set the default pthread
4560 attributes of a process.
4562 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
4563 This may improve lock scaling of existing programs on TSX capable systems.
4564 When the --enable-lock-elision=yes parameter is specified at configure
4565 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
4568 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
4569 availability). Implemented by Ryan S. Arnold.
4571 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
4575 * The following bugs are resolved with this release:
4577 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
4578 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
4579 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
4580 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
4581 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
4582 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
4583 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
4584 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
4585 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
4586 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
4587 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
4588 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
4589 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
4590 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
4591 14879, 14889, 14893, 14898, 14914.
4593 * Optimization of memcpy for MIPS.
4595 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
4596 EMFILE has been fixed (Bugzilla #14889).
4598 * The add-on ports collection is now distributed in the "ports" subdirectory
4599 of the main GNU C Library distribution, rather than separately.
4601 * Port to ARM AArch64 contributed by Linaro.
4603 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
4604 Optimized versions of memcpy, memset, and memcmp added for System z10 and
4606 Implemented by Andreas Krebbel.
4608 * The new function secure_getenv allows secure access to the environment,
4609 returning NULL if running in a SUID/SGID process. This function replaces
4610 the internal function __secure_getenv.
4612 * SystemTap static probes have been added into the dynamic linker.
4613 Implemented by Gary Benson.
4615 * Optimizations of string functions strstr, strcasestr and memmem.
4616 Implemented by Maxim Kuvyrkov.
4618 * The minimum Linux kernel version that this version of the GNU C Library
4619 can be used with is 2.6.16.
4621 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
4622 powerpc POWER7. Implemented by Will Schmidt.
4624 * New configure option --disable-nscd builds the C library such that it
4625 never attempts to contact the Name Service Caching Daemon (nscd).
4626 New configure option --disable-build-nscd avoids building nscd itself;
4627 this is the default if --disable-nscd is used.
4629 * Improved support for cross-compilation, including cross-testing and
4630 bootstrap builds without a previously built glibc.
4632 * Several testsuite tests are now able to test multiple IFUNC variants of an
4633 interface, rather than just testing the one that would be chooen by
4636 * New configure options --with-bugurl and --with-pkgversion, for
4637 distributors to use to embed their bug-reporting and package version
4638 information in --help and --version output.
4640 * The ttyname and ttyname_r functions on Linux now fall back to searching for
4641 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
4642 allows creation of chroots without the procfs mounted on /proc.
4644 * The `crypt' function now fails if passed salt bytes that violate the
4645 specification for those values. On Linux, the `crypt' function will
4646 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
4647 enabled, and fail on encrypted strings using the MD5 or DES algorithm
4648 when the mode is enabled.
4650 * The `clock_*' suite of functions (declared in <time.h>) is now available
4651 directly in the main C library. Previously it was necessary to link with
4652 -lrt to use these functions. This change has the effect that a
4653 single-threaded program that uses a function such as `clock_gettime' (and
4654 is not linked with -lrt) will no longer implicitly load the pthreads
4655 library at runtime and so will not suffer the overheads associated with
4656 multi-thread support in other code such as the C++ runtime library.
4658 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
4663 * The following bugs are resolved with this release:
4665 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
4666 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
4667 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
4668 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
4669 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
4670 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
4671 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
4672 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
4673 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
4674 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
4675 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
4676 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
4677 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
4678 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
4679 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
4680 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
4681 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
4682 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
4683 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
4684 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
4685 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
4686 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
4689 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
4690 configuring glibc with:
4691 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
4692 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
4693 Implemented by H.J. Lu.
4697 + define static_assert
4699 + do not declare gets
4701 + declare at_quick_exit and quick_exit also for ISO C11
4703 + aligned_alloc. NB: The code is deliberately allows the size parameter
4704 to not be a multiple of the alignment. This is a moronic requirement
4705 in the standard but it is only a requirement on the caller, not the
4708 + timespec_get added
4710 + uchar.h support added
4712 + CMPLX, CMPLXF, CMPLXL added
4714 Implemented by Ulrich Drepper.
4716 * Support for the IA-64 has been moved to ports.
4718 * Remove support for anything but ELF binary format
4720 * Checking versions of poll, ppoll added.
4721 Implemented by Ulrich Drepper.
4723 * More generic and 64-bit performance optimizations to math functions.
4724 Implemented by Ulrich Drepper.
4726 * New configure option --enable-obsolete-rpc makes the deprecated RPC
4727 headers and functions available at compile time as they were before
4728 version 2.14. This option will be removed at some time in the future
4729 after the TI-RPC library becomes fully sufficient for the needs of
4730 existing applications.
4732 * Compatibility code for Linux kernel versions before 2.4 has been removed.
4733 Note that glibc is not expected to work with any Linux kernel version
4736 * New header <sys/auxv.h> and function getauxval allowing easy access to
4737 the AT_* key-value pairs passed from the Linux kernel. The header also
4738 defines the HWCAP_* bits associated with the AT_HWCAP key.
4740 * New locales: mag_IN
4742 * New configure option --enable-systemtap builds SystemTap static probes
4743 into libc for setjmp and longjmp and into libpthread for various operations.
4744 So far the setjmp/longjmp probes and some of the libpthread probes are
4745 provided only for i*86 and x86_64.
4746 Implemented by Roland McGrath and Rayson Ho.
4748 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
4750 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
4753 * More optimized functions for SPARC. Implemented by David S. Miller.
4755 * Improved support for cross-compilation, especially bootstrap builds
4756 without a previously built glibc.
4758 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
4759 Chris Metcalf from Tilera.
4761 * Support for the old ARM ABI has been removed from ports. Only the EABI is
4762 now supported for ARM processors.
4764 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
4765 as the name of the dynamic linker, to distinguish it from the
4766 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
4768 * Support for CRIS has been removed from ports.
4770 * A new class of installed header has been documented for low-level
4771 platform-specific functionality. PowerPC added the first instance with a
4772 function to provide time base register access. Contributed by Tulio
4773 Magno Quites Machado Filho.
4775 * ix86 configurations now install header files that are consistent with
4776 what x86-64 configurations install. These same header files can be used
4777 for -m32, -m64, or -mx32 builds.
4778 Contributed by H.J. Lu.
4780 * Math library bug fixes. A thorough audit of all open math library bugs was
4781 conducted by Joseph Myers. Significant progress was made on many math
4782 library bugs resulting in more accurate exceptions and function results.
4783 Many thanks to all those that contributed including Andreas Jaeger for his
4784 patch review and work on the x87 trigonometric instruction issues.
4786 * Timezone data is no longer installed. Timezone-related binaries and scripts
4787 will continue to be installed. Users should obtain their timezone data from
4788 their distribution provider or from the tzdata package at
4789 <ftp://munnari.oz.au/pub/>.
4793 * The following bugs are resolved with this release:
4795 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
4796 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
4797 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
4798 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
4799 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
4800 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
4801 13484, 13506, 13515, 13523, 13524, 13538, 13540
4803 * New program pldd to list loaded object of a process
4804 Implemented by Ulrich Drepper.
4806 * Add nss_db support back to glibc. No more dependency on Berkeley db
4807 and support for initgroups lookups.
4808 Implemented by Ulrich Drepper.
4810 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4811 Contributed by HJ Lu.
4813 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4814 Contributed by HJ Lu.
4816 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4817 on x86-32 and x86-64.
4818 Contributed by Liubov Dmitrieva.
4820 * Optimized strchr and strrchr for SSE on x86-32.
4821 Contributed by Liubov Dmitrieva.
4823 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4824 for x86-64 and x86-32.
4825 Contributed by Liubov Dmitrieva.
4827 * New interfaces: scandirat, scandirat64
4828 Implemented by Ulrich Drepper.
4830 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4831 Implemented by Ulrich Drepper.
4833 * nscd now also caches the netgroup database.
4834 Implemented by Ulrich Drepper.
4836 * Integrate libm with gcc's -ffinite-math-only option.
4837 Implemented by Ulrich Drepper.
4839 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4840 to math functions. Implemented by Ulrich Drepper.
4842 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4843 Implemented by Ulrich Drepper.
4845 * New Linux interfaces: process_vm_readv, process_vm_writev
4847 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4848 Implemented by Ulrich Drepper.
4850 * Optimized nearbyint and strcasecmp for PPC.
4851 Implemented by Adhemerval Zanella.
4853 * New locales: bho_IN, unm_US, es_CU, ta_LK
4857 * The following bugs are resolved with this release:
4859 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4860 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4861 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4862 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4863 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4864 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4865 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4866 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4867 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4868 12795, 12811, 12813, 12814, 12841
4870 * The RPC implementation in libc is obsoleted. Old programs keep working
4871 but new programs cannot be linked with the routines in libc anymore.
4872 Programs in need of RPC functionality must be linked against TI-RPC.
4873 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4875 Visible changes of this change include (obviously) the inability to link
4876 programs using RPC functions without referencing the TI-RPC library and the
4877 removal of the RPC headers from the glibc headers.
4878 Implemented by Ulrich Drepper.
4880 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4881 syncfs, setns, sendmmsg
4883 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4884 yue_HK, lij_IT, mhr_RU
4886 * New encodings: CP770, CP771, CP772, CP773, CP774
4888 * New program sotruss to trace calls through PLTs
4889 Implemented by Ulrich Drepper.
4891 * The malloc hook implementation is marked deprecated and will be removed
4892 from the default implementation in the next version. The design never
4893 worked ever since the introduction of threads. Even programs which do
4894 not create threads themselves can use multiple threads created internally.
4898 * The following bugs are resolved with this release:
4900 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4901 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4902 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4903 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4906 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4908 * POWER7 optimizations: memset, memcmp, strncmp
4910 * New optimized string functions for x86-64: strnlen (SSE2),
4911 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4912 Implemented by Ulrich Drepper.
4916 * The following bugs are resolved with this release:
4918 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4919 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4920 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4921 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4922 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4923 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4924 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4925 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4927 * New interfaces: pthread_getname_np, pthread_setname_np
4929 * New Linux interface: recvmmsg
4931 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4933 * The dynamic linker now recognizes supported ABI versions from the
4934 EI_ABIVERSION field in the ELF header.
4935 Implemented by Ulrich Drepper.
4937 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4938 will not be used to fill in password fields in the passwd.byname replies.
4939 Instead it is used to synthesize the shadow.byname table, should it be
4940 missing. This is a useful mode in some installations involving Solaris.
4941 Implemented by Ulrich Drepper.
4943 * New locales: kok_IN, sq_MK, cv_RU
4947 * The following bugs are resolved with this release:
4949 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4950 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4951 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4952 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4953 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4954 10789, 10817, 10823, 10840, 10847
4956 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4958 Implemented by Ulrich Drepper.
4960 * Checking version of longjmp added that fails if an uninitialized stack
4961 frame would be created. Implemented by Ulrich Drepper.
4963 * STT_GNU_IFUNC is now supported in static executables.
4964 Implemented by H.J. Lu.
4966 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4968 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4969 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4970 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4971 Contributed by H.J. Lu.
4973 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4974 Implemented by Ulrich Drepper.
4976 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4978 Contributed by H.J. Lu.
4980 * Support for fma instruction in AVX on x86-64.
4981 Implemented by H.J. Lu and Ulrich Drepper.
4983 * AVX support in x86-64 auditing support in ld.so.
4984 Implemented by H.J. Lu.
4986 * STB_GNU_UNIQUE support added.
4987 Implemented by Ulrich Drepper.
4989 * Implement second fallback mode for optimized DNS lookup for even more
4990 broken environments. If two requests from the same port are not
4991 handled correctly close the socket and open a new one before sending
4992 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4993 can be used to select this mode right away, instead of rediscovering the
4994 necessity is every process again.
4995 Implemented by Ulrich Drepper.
4997 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4998 Implemented by Adam Tkac.
5000 * Optimized iconv conversions for S390x.
5001 Implemented by Andreas Krebbel.
5003 * Using condvars with PI mutexes is now more efficient due to kernel
5004 support for requeueing to PI futexes. NPTL support added for x86-64.
5005 Implemented by Ulrich Drepper.
5007 * New locales: ps_AF, my_MM
5011 * The following bugs are resolved with this release:
5013 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
5014 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
5015 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
5016 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
5017 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
5019 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
5020 Implemented by Ulrich Drepper.
5022 * New Linux interfaces: accept4, fallocate, fallocate64.
5023 Implemented by Ulrich Drepper.
5025 * Correct declarations of string function when used in C++ code. This
5026 could lead to compile errors for invalid C++ code.
5028 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
5031 * New POSIX 2008 interface: psiginfo
5032 Implemented by Ulrich Drepper.
5034 * New ISO C++1x interfaces: quick_exit, at_quick_exit
5035 Implemented by Ulrich Drepper.
5037 * Support for selecting between multiple function definitions at runtime
5038 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
5040 * The libcrypt library can now use the hash function implementations in
5041 NSS. Implemented by Ulrich Drepper.
5043 * The malloc implementation can be compiled to be less memory efficient
5044 but higher performing in multi-threaded programs.
5045 Implemented by Ulrich Drepper.
5047 * New locales: nan_TW@latin, ks_IN
5049 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
5050 Implemented by Ulrich Drepper.
5052 * Extended printf hook support. It is possible to use user-defined types
5053 and extend existing format specifiers.
5054 Implemented by Ulrich Drepper.
5056 * Handling for group shadow files has been added.
5057 Implemented by Ulrich Drepper.
5059 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
5060 servers (the case, e.g., for some people using the built-in DNS
5061 server in ADSL modems/routers). There is a once-per-process timeout
5062 in case of a broken server. To avoid it, users can run nscd or put
5063 'options single-request' in /etc/resolv.conf.
5064 Implemented by Ulrich Drepper.
5068 * The following bugs are resolved with this release:
5070 2447, 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447,
5071 6461, 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712,
5072 6713, 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839,
5073 6843, 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955,
5074 6966, 6968, 6974, 6980, 6995, 7008, 7009, 7029
5076 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
5077 up at the same time. Implemented by Ulrich Drepper.
5079 * TLS descriptors for LD and GD on x86 and x86-64.
5080 Implemented by Alexandre Oliva.
5082 * getaddrinfo now handles DCCP and UDPlite.
5083 Implemented by Ulrich Drepper.
5085 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
5086 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
5087 Implemented by Ulrich Drepper.
5089 * New implementation of memmem, strstr, and strcasestr which is O(n).
5090 Implemented by Eric Blake.
5092 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
5094 * Implement "e" option for popen to open file descriptor with the
5095 close-on-exec flag set. Implemented by Ulrich Drepper.
5097 * Implement "b" mode for fmemopen. In this mode writes writes don't
5098 implicitly add a NUL byte and seeks from the end of the buffer really
5099 use the buffer end, not the string length as the basis.
5100 Implemented by Ulrich Drepper.
5102 * Many functions, exported and internal, now atomically set the close-on-exec
5103 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
5105 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
5107 Implemented by Pravin Satpute.
5109 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
5113 * The following bugs are resolved with this release:
5115 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
5116 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
5117 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
5118 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
5119 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
5120 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
5121 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
5123 * New locales: bo_CN, bo_IN, shs_CA.
5125 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
5127 * Sorting rules for some Indian languages (Devanagari and Gujarati).
5128 Implemented by Pravin Satpute.
5130 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
5132 * nscd caches now all timeouts for DNS entries
5133 Implemented by Ulrich Drepper.
5135 * nscd is more efficient and wakes up less often.
5136 Implemented by Ulrich Drepper.
5138 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
5139 vdprintf, and obstack_vprintf.
5140 Implemented by Jakub Jelinek.
5142 * Faster memset for x86-64.
5143 Implemented by Harsha Jagasia and H.J. Lu.
5145 * Faster memcpy on x86.
5146 Implemented by Ulrich Drepper.
5148 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
5149 Implemented by Ulrich Drepper.
5151 * Faster sqrt and sqrtf implemention for some PPC variants.
5152 Implemented by Steven Munroe.
5156 * The following bugs are resolved with this release:
5158 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
5159 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
5160 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
5161 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
5162 5071, 5103, 5104, 5112, 5113, 5184, 5186
5164 * More checking functions: fread, fread_unlocked, open*, mq_open.
5165 Implemented by Jakub Jelinek and Ulrich Drepper.
5167 * Extend fortification to C++. Implemented by Jakub Jelinek.
5169 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
5170 by not recognizing 'a' as a modifier when those specs are requested.
5171 Implemented by Jakub Jelinek.
5173 * PPC optimizations to math and string functions.
5174 Implemented by Steven Munroe.
5176 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
5177 options to be passed. Implemented by Ulrich Drepper.
5179 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
5181 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
5182 Implemented by Ulrich Drepper.
5184 * Handle private futexes in the NPTL implementation.
5185 Implemented by Jakub Jelinek and Ulrich Drepper.
5187 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
5188 Implemented by Roland McGrath and Ulrich Drepper.
5190 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
5192 * SHA-256 and SHA-512 based password encryption.
5193 Implemented by Ulrich Drepper.
5195 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
5196 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
5199 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
5200 Implemented by Ulrich Drepper.
5204 * The following bugs are resolved with this release:
5206 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
5207 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
5208 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
5209 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
5210 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
5211 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
5212 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
5215 * New Linux interfaces: epoll_pwait, sched_getcpu.
5217 * New generic interfaces: strerror_l.
5219 * nscd can now cache the services database. Implemented by Ulrich Drepper.
5223 * The following bugs are resolved with this release:
5225 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
5226 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
5227 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
5228 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
5229 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
5230 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
5231 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
5232 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
5233 3225, 3251, 3252, 3253, 3273
5235 * For Linux, the sorting of addresses returned by getaddrinfo now also
5236 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
5237 Implemented by Ulrich Drepper.
5239 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
5240 Implemented by Ulrich Drepper.
5242 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
5244 * New iconv module for MIK. Contributed by Alexander Shopov.
5246 * For sites with broken group and/or passwd database, the auto-propagate
5247 option of nscd can prevent creating ID lookup entries from the results
5248 of a name lookup and vice versa. This usually is no problem but some
5249 site might have problems with the default behavior.
5250 Implemented by Ulrich Drepper.
5252 * Iterating over entire database in NIS can be slow. With the
5253 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
5254 to trade time for memory. The entire database will be read at once.
5255 Implemented by Ulrich Drepper.
5257 * The interfaces introduced in RFC 3542 have been implemented by
5260 * Support for the new ELF hash table format was added by Ulrich Drepper.
5262 * Support for priority inheritance mutexes added by Jakub Jelinek and
5265 * Support for priority protected mutexes added by Jakub Jelinek.
5267 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
5268 or_IN, csb_PL, fy_NL, sr_ME.
5272 * More overflow detection functions.
5274 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
5275 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
5277 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
5278 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
5279 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
5280 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
5281 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
5282 by Masahide Washizawa.
5284 * It is now possible to install audit libraries for the dynamic linker using
5285 LD_AUDIT. Implemented by Ulrich Drepper.
5287 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
5288 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
5289 For a libc and libpthread that works well on Linux 2.4 kernels, we
5290 recommend using the stable 2.3 branch.
5292 * The new function open_wmemstream acts like open_memstream,
5293 but uses a wchar_t wide character buffer.
5295 * The new function ppoll is an improved version of poll, similar to pselect.
5297 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
5298 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
5299 renameat, unlinkat, linkat, symlinkat, readlinkat.
5301 * New Linux kernel system calls: unshare,
5302 inotify_init, inotify_add_watch, inotify_rm_watch.
5304 * The euidaccess function is now also known by the alias eaccess,
5305 for compatibility with some other systems.
5307 * Timezone data updated to 2006b version.
5311 * The following bugs are resolved with this release:
5313 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
5314 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
5315 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
5316 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
5317 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
5318 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
5320 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5322 * As of this release, GCC 4 can be used to compile the C Library.
5324 * Timezone data updated to 2005m version.
5328 * The following bugs are resolved with this release:
5330 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
5331 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
5332 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
5333 777, 787, 821, 822, 823, 825
5335 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5339 * Support for RFC 3678. Real implementations exist only for Linux so far.
5340 Implemented by Ulrich Drepper.
5342 * nscd can now cache entries persistently. Expiring entries are reloaded.
5343 For speedups the cache can be shared in memory with client processes.
5344 Implemented by Ulrich Drepper.
5346 * nscd can now perform SELinux checks.
5347 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
5349 * getaddrinfo queries are now cached. Canonical name lookup is performed
5351 Implemented by Ulrich Drepper.
5353 * The nothrow function attribute is used when headers are used by gcc when
5354 compiling C code. This can avoid significant amounts of exception
5357 * The malloc functions perform more error checking and are stricter when
5358 it comes to reacting on errors. The default action is to terminate
5359 the process after showing an error message. Implemented by Ulrich Drepper.
5361 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
5362 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
5364 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
5365 namespaces using the new function dlmopen(). This feature is of course,
5366 like most other dynamic loading functionality, not available in statically
5367 linked applications. Implemented by Ulrich Drepper.
5369 * Low-overhead boundary checking variants of string and some stdio functions
5370 were added. These are to be used in conjunction with a gcc patch by
5371 Jakub Jelinek which adds calls to these functions if possible.
5372 Implemented by Jakub Jelinek and Ulrich Drepper.
5374 * Old code for several operating systems and machine architectures that
5375 have not been in working condition in a long time have been removed from
5376 the main source tree maintained by the GNU C Library's maintainers.
5377 These files are now reside in the separate `ports' source module
5378 that is usable as an add-on when building the library.
5382 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
5383 interrogate the dynamic linker, compatible with the Solaris interface.
5385 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
5386 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
5388 * getifaddrs now uses the netlink interface on Linux to get its information.
5389 Implemented by Thorsten Kukuk.
5391 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
5392 Implemented by Ulrich Drepper.
5394 * support for non-executable stacks on x86 has been added. Changes mostly
5397 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
5400 * getaddrinfo now performs destination address selection according to
5405 * Thread-safe interfaces for many functions that access locale data
5406 were added in version 2.3, but these features were omitted from NEWS.
5407 Many functions have variants with an `_l' suffix that take a `locale_t'
5408 object as a parameter rather than consulting the current locale.
5409 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
5410 create and maintain `locale_t' objects. Additionally, the new function
5411 `uselocale' sets "the current locale" (as used by functions not so
5412 parameterized) set for an individual thread. These features were added
5413 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
5415 * The functions getresuid, getresgid, setresuid, and setresgid, which
5416 have long been available on Linux, are now declared in <unistd.h>
5417 and are now also available on the Hurd.
5419 * ELF thread-local storage support (TLS) now works on x86-64.
5421 * The new dynamic string token $LIB is expanded in shared library names.
5422 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
5424 * Aldy Hernandez contributed complete software floating point support for
5425 PowerPC machines with no FPU.
5427 * fexecve is implemented on Linux.
5429 * The `btowc' function should work at least twice as fast due to
5430 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
5432 * With approriate thread add-ons cancelable functions are now implemented
5433 in libc.so as well. No need to call the function in libpthread. This
5434 change allowed to finally disable the incorrect and expensive handling
5435 of weak definition in ld.so.
5437 * Yet more PLT entries in libc.so have been removed. We finally arrived
5438 at the bare minimum. Startup times improved appropriately.
5440 * Support for the new Linux/x86 system call interface was added. The
5441 AT_SYSINFO auxiliary vector entry is recognized and handled.
5445 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
5448 * iconv (the program and the interface) now accepts empty names (excluding
5449 options like //TRANSLIT) to mean "use charset of current locale".
5451 * localedef can now transliterate characters in strings which are not in
5452 the provided charmap. The information from the input locale is used.
5454 * Prelinking support was added for ELF targets. This requires additional
5455 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
5457 * Read-only stdio streams now use mmap to speed up operation by eliminating
5458 copying and buffer underflows. To use add 'm' to the mode string of
5459 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
5461 * The malloc functions were completely rewritten by Wolfram Gloger based
5462 on Doug Lea's malloc-2.7.0.c.
5464 * Isamu Hasegawa contributed a completely new and POSIX-conformant
5465 implementation of regex.
5467 * Bruno Haible upgraded the iconv and locale implementation to support
5470 * Contents of the LC_* and LANG environment variables in the CEN style are
5471 not recognized anymore. It never was used. Change by Ulrich Drepper.
5473 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
5474 thread-local storage (TLS) ABI on some platforms.
5475 Changes by Ulrich Drepper. SH support by Kaz Kojima.
5477 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
5478 EUC-JISX0213, and TSCII.
5480 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
5481 BSD-compatible interface for getting all network interface addresses.
5482 Implementation for IPv4 by Roland McGrath.
5484 * Loading of locale data is faster due to the introduction of a locale
5485 archive. Implemented by Roland McGrath and Ulrich Drepper.
5487 * Startup times are significantly reduced by not using exported functions
5488 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
5491 * Steven Munroe contributed a port to PowerPC64/Linux.
5495 * The Hurd now uses the GNU libio implementation of stdio rather than the
5496 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
5498 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
5499 with the same behavior as the Linux system call of the same name.
5503 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
5504 128-bit long double format.
5506 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
5507 IBM1161, and IBM1162 charsets.
5509 * Andreas Jaeger contributed a port to x86-64/Linux.
5511 * Peter Bruin contributed a port to PowerPC/Hurd.
5513 * libc functions using I/O streams now can handle wide-oriented streams
5516 * optimizations in the dynamic linker. Binaries created by recent binutils
5517 versions start up quicker due to reduced time spent on relocations.
5519 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
5523 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
5524 asinh, atanh, j0 for the 128-bit long double format.
5526 * Bruno Haible updated all the code handling Unicode in some form to
5527 support Unicode 3.1.
5529 * Speed of regex for single-byte locales is back to previous levels.
5530 Patch by Isamu Hasegawa.
5532 * Alpha, SPARC, and IA-64 now also using floating stacks.
5534 * Startup time of internationalized applications greatly improved through
5535 iconv cache. Use iconvconfig to generate the cache file.
5536 Contributed by Ulrich Drepper.
5538 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
5539 severe performance problems. Patch by David Mosberger.
5541 * The Hurd port got a lot more functionality like AIO, various stdio
5542 extensions, etc. Mainly done by Roland McGrath.
5544 * mtrace can now lookup symbols in shared libraries.
5548 * Intel's IA-64 math library is largely integrated. It provides fast and
5549 accurate implementatations for most basic and standard math functions
5550 in float, double, and long double format.
5552 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
5553 and asin for the 96-bit long double format and asin, log, tan for the
5554 128-bit long double format.
5556 * The beginning of a last-bit accurate math library by IBM Haifa were added.
5557 The basic double functions exist today. Contributed by Abraham Ziv
5558 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
5559 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
5561 * An asynchronous name lookup library was added. The interface is designed
5562 after POSIX AIO. The proposal was circulated beforehand to get comments.
5563 No negative ones came in. Implemented by Ulrich Drepper.
5565 * Port to S390/64bit contributed by Martin Schwidefsky
5566 <schwidefsky@de.ibm.com>.
5568 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
5569 of functions for Linux/IA-64.
5571 * The RPC code is now thread safe. Threads can now use the same service
5572 of different services at the same time. Patch by Eric Norum
5573 <eric.norum@usask.ca> with some help by Ulrich Drepper.
5575 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
5576 family of functions for Linux/S390.
5578 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
5579 of functions for Linux/x86.
5581 * Port to Linux/CRIS contributed by Axis Communications.
5585 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
5586 we can now check for namespace violations and missing declarations. The
5587 result is that almost all headers are now Unix-compliant (as defined in
5588 the upcoming XPG6). The negative side is that some programs might need
5589 corrections, too, if they depend on the incorrect form of the headers in
5590 previous versions which defined too many symbols and included too many
5593 * regex now handles multibyte character sets correctly.
5594 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
5596 * iconv (the program) does now conform to the upcoming XPG6 and handles
5597 charmaps. Instead of the charset names the path of charmaps can be
5598 provided and the conversion happens based on this data.
5599 Contributed by Ulrich Drepper.
5601 * The locale program now provides detailed information about the installed
5606 only lists the names of the supported locales
5610 provides details such as country, language, and codeset name.
5611 Contributed by Ulrich Drepper.
5615 * The gencat program now parses the input file according to the charset
5616 selected by the LC_CTYPE category. This is important for stateful
5617 character sets. To make generating catalogs easier there is a way
5618 to overwrite the charset selected by the locale: before the first
5619 message or $ quote line the catalog can contain a line like
5621 $ codeset=ISO-8859-2
5623 to select the charset (ISO-8859-2 in this case).
5625 Implemented by Shinya Hanataka and Ulrich Drepper.
5627 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
5628 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
5629 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
5631 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
5632 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
5634 * The LANGUAGE environment variable is now ignored unless the locale is
5635 changed from the default "C" locale.
5637 * The usual bug fixes.
5641 * Greg McGary added runtime support for bounds checking using gcc's
5642 new -fbounded-pointers option. ix86 target is complete. PowerPC
5645 * Thorsten Kukuk added secure mode support to nscd.
5647 * The Berkeley db libraries have been removed.
5649 Related, the nss_db module is now in a separate package since it
5650 obviously requires a database library being available.
5652 * Wide character I/O streams implemented by Ulrich Drepper.
5654 * Functions from the extended socket API added by Ulrich Drepper.
5656 * Functions feenableexcept and fedisableexcept to control the
5657 behaviour of individual exceptions have been added by Andreas Jaeger.
5659 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
5661 * The resolver code has been updated from bind 8.2.3-T5B which supports
5662 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
5665 This change could in some situations effect backward compatibility. Since
5666 now `_res' is a thread-local instead of a global variable, modifying it
5667 in one thread does not have any effect in other threads.
5669 The resolver library was also extended to allow IPv6 as the transport
5670 protocol for the requests. This work was done by Stig Venaas.
5672 * Compatibility code for K&R C compilers has been removed from the
5673 header files. A ISO C compiler is needed to use the library
5674 (conforming to either C89 or C99 standard).
5676 * Complete rewrite of the localedef program to support multibyte character
5677 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
5678 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
5679 Implemented by Ulrich Drepper.
5681 Bruno Haible significantly improved the generation and use of the data
5682 structures for the wide character tables.
5684 * Plural handling in gettext implemented by Ulrich Drepper.
5686 * The utmp daemon has been removed.
5688 * The port to MIPS-Linux has been finished by Andreas Jaeger.
5690 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
5693 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
5695 * POSIX barriers implemented by Kaz Kylheku.
5697 * POSIX spawn function family implemented by Ulrich Drepper.
5699 * POSIX spinlocks are now available.
5701 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
5703 * the configure option --enable-kernel=X.Y.Z allows to strip out
5704 compatibility for kernel versions before X.Y.Z. This is currently only
5705 implemented for Linux.
5707 * the sockaddr_in6 structure changed. The IPv6 working group added a new
5708 field sin6_scope_id. This means that all programs using IPv6 should be
5709 recompiled. Don't expect binary compatibility with previous glibc
5712 * various conversion modules for IBM character sets contributed by
5715 * IA-64 port by Jes Sorensen and HJ Lu.
5729 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
5731 * New xdr functions are added; some rpc functions are now 64bit clean.
5733 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
5735 * Fixed known incompatibilities with glibc 2.0.
5737 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
5739 * Optimized a number of functions (especially the ELF dynamic loader).
5741 * Update timezone data files.
5743 * lots of charmaps corrections
5745 * some new locale definitions and charmaps
5750 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
5751 conform to POSIX member type requirements. Symbol versions have been
5752 adjusted as needed within the library, and for direct use by applications,
5753 but there is potential for problems if third-party libraries use
5754 struct timeval as part of their interface. This does not present
5755 a problem for X and other "essential" system libraries.
5757 * An additional locale model to support C++ Standard Library locale
5758 model and probably more was implemented by Ulrich Drepper.
5760 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
5763 * Miles Bader provided the `argp' function family to support hierachical
5764 command line argument parsing, layered on top of getopt.
5766 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
5768 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
5771 * scanf recognizes the %a and %A format for scanning floating point numbers.
5773 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
5774 information and interfaces for the available integer types.
5776 * about 130 new math functions were added to implement the ISO C9x math
5779 * the new header <complex.h> contains definitions of the complex math
5780 functions from ISO C 9X.
5782 * the new header <tgmath.h> defines generic macros to use complex or
5783 real valued functions.
5785 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
5787 * Andreas Jaeger provided a test suite for the math library.
5789 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
5791 * Ulrich Drepper added character set conversion functions (iconv).
5793 * Optimized string functions have been added.
5795 * The localedata addon is now part of glibc.
5797 * An implementation of profiling shared libraries was added by Ulrich Drepper.
5799 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
5800 daemon for NSS (nscd).
5802 Missing a better place here are some numbers on improvements. Under
5803 Linux 2.1.125 un-tar-ing the kernel sources takes
5807 using local files 12.19s 6.88s 22.91s
5809 using NIS 13.92s 8.91s 26.34s
5811 using NIS & nscd 10.37s 7.34s 25.30s
5813 using NIS+ 27.57s 30.37s 640.46s
5815 using NIS+ & nscd 10.25s 7.83s 26.51s
5817 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5819 Keep in mind that non-namelookup related operations dominate above times.
5820 It was just a common complain that using NIS+ unpacking the kernel is
5823 [1] The old nscd implementation is not available anymore since it was
5824 distributed with glibc up to version 2.0.98 and thus is now replaced.
5826 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5828 * Mark Kettenis provided a Hesiod NSS module.
5830 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5831 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5833 * rcmd can now handle netgroups (Dick Streefland).
5835 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5838 * Support for the IPv6 protocol has been added to the socket API, as per the
5839 latest draft standards.
5841 * Support for Linux 2.2 has been added.
5843 * Interface changes relative to the latest 2.0.x release:
5844 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5845 addseverity NEW: Unix98
5846 alphasort64 NEW: LFS
5847 argp_err_exit_status NEW: argp, GNU ext
5848 argp_error NEW: argp, GNU ext
5849 argp_failure NEW: argp, GNU ext
5850 argp_help NEW: argp, GNU ext
5851 argp_parse NEW: argp, GNU ext
5852 argp_program_bug_address NEW: argp, GNU ext
5853 argp_program_version NEW: argp, GNU ext
5854 argp_program_version_hook NEW: argp, GNU ext
5855 argp_state_help NEW: argp, GNU ext
5856 argp_usage NEW: argp, GNU ext
5857 authdes_create NEW: Secure RPC
5858 authdes_getucred NEW: Secure RPC
5859 authdes_pk_create NEW: Secure RPC
5860 backtrace NEW: GNU ext.
5861 backtrace_symbols NEW: GNU ext.
5862 backtrace_symbols_fd NEW: GNU ext.
5864 cacosf NEW: ISO C 9x
5865 cacosh NEW: ISO C 9x
5866 cacoshf NEW: ISO C 9x
5867 cacoshl NEW: ISO C 9x
5868 cacosl NEW: ISO C 9x
5875 casinf NEW: ISO C 9x
5876 casinh NEW: ISO C 9x
5877 casinhf NEW: ISO C 9x
5878 casinhl NEW: ISO C 9x
5879 casinl NEW: ISO C 9x
5881 catanf NEW: ISO C 9x
5882 catanh NEW: ISO C 9x
5883 catanhf NEW: ISO C 9x
5884 catanhl NEW: ISO C 9x
5885 catanl NEW: ISO C 9x
5886 cbc_crypt NEW: Secure RPC
5890 ccoshf NEW: ISO C 9x
5891 ccoshl NEW: ISO C 9x
5897 cimagf NEW: ISO C 9x
5898 cimagl NEW: ISO C 9x
5899 clearerr_locked REMOVED
5900 clntunix_create NEW: sunrpc ext
5902 clog10 NEW: ISO C 9x
5903 clog10f NEW: ISO C 9x
5904 clog10l NEW: ISO C 9x
5914 cprojf NEW: ISO C 9x
5915 cprojl NEW: ISO C 9x
5917 crealf NEW: ISO C 9x
5918 creall NEW: ISO C 9x
5923 csinhf NEW: ISO C 9x
5924 csinhl NEW: ISO C 9x
5927 csqrtf NEW: ISO C 9x
5928 csqrtl NEW: ISO C 9x
5932 ctanhf NEW: ISO C 9x
5933 ctanhl NEW: ISO C 9x
5935 des_setparity NEW: Secure RPC
5936 ecb_crypt NEW: Secure RPC
5937 endutxent NEW: Unix98
5939 exp10f NEW: ISO C 9x
5940 exp10l NEW: ISO C 9x
5944 fattach NEW: STREAMS
5945 fdetach NEW: STREAMS
5949 feclearexcept NEW: ISO C 9x
5950 fegetenv NEW: ISO C 9x
5951 fegetexceptflag NEW: ISO C 9x
5952 fegetround NEW: ISO C 9x
5953 feholdexcept NEW: ISO C 9x
5955 feraiseexcept NEW: ISO C 9x
5956 ferror_locked REMOVED
5957 fesetenv NEW: ISO C 9x
5958 fesetexceptflag NEW: ISO C 9x
5959 fesetround NEW: ISO C 9x
5960 fetestexcept NEW: ISO C 9x
5961 feupdateenv NEW: ISO C 9x
5962 fflush_locked REMOVED
5966 fgets_unlocked NEW: GNU ext.
5967 fileno_locked REMOVED
5979 fputc_locked REMOVED
5980 fputs_unlocked NEW: GNU ext.
5981 fread_unlocked NEW: GNU ext.
5986 fstatvfs NEW: Unix98
5990 ftruncate64 NEW: LFS
5992 fwrite_unlocked NEW: GNU ext.
5993 gai_strerror NEW: IPv6
5997 getchar_locked REMOVED
5999 getdate_err NEW: Unix98
6000 getdate_r NEW: GNU ext.
6002 getnameinfo NEW: IPv6
6003 getnetname NEW: Secure RPC
6004 getpmsg NEW: STREAMS
6005 getpt NEW: Unix98 PTY
6006 getrlimit64 NEW: LFS
6007 getutxent NEW: Unix98
6008 getutxid NEW: Unix98
6009 getutxline NEW: Unix98
6010 glob64 NEW: GNU ext.
6011 globfree64 NEW: GNU ext.
6012 gnu_get_libc_release NEW: GNU ext.
6013 gnu_get_libc_version NEW: GNU ext.
6014 grantpt NEW: Unix98 PTY
6015 host2netname NEW: Secure RPC
6017 iconv_close NEW: iconv
6018 iconv_open NEW: iconv
6019 if_freenameindex NEW: IPv6
6020 if_indextoname NEW: IPv6
6021 if_nameindex NEW: IPv6
6022 if_nametoindex NEW: IPv6
6023 in6addr_any NEW: IPv6
6024 in6addr_loopback NEW: IPv6
6025 inet6_isipv4mapped NEW: IPv6
6026 isastream NEW: STREAMS
6027 iswblank NEW: GNU ext.
6028 key_decryptsession NEW: Secure RPC
6029 key_decryptsession_pk NEW: Secure RPC
6030 key_encryptsession NEW: Secure RPC
6031 key_encryptsession_pk NEW: Secure RPC
6032 key_gendes NEW: Secure RPC
6033 key_get_conv NEW: Secure RPC
6034 key_secretkey_is_set NEW: Secure RPC
6035 key_setnet NEW: Secure RPC
6036 key_setsecret NEW: Secure RPC
6037 llrint NEW: ISO C 9x
6038 llrintf NEW: ISO C 9x
6039 llrintl NEW: ISO C 9x
6040 llround NEW: ISO C 9x
6041 llroundf NEW: ISO C 9x
6042 llroundl NEW: ISO C 9x
6047 lrintf NEW: ISO C 9x
6048 lrintl NEW: ISO C 9x
6049 lround NEW: ISO C 9x
6050 lroundf NEW: ISO C 9x
6051 lroundl NEW: ISO C 9x
6053 makecontext NEW: Unix98
6054 mempcpy NEW: GNU ext.
6057 modify_ldt NEW: kernel
6061 nearbyint NEW: ISO C 9x
6062 nearbyintf NEW: ISO C 9x
6063 nearbyintl NEW: ISO C 9x
6064 netname2host NEW: Secure RPC
6065 netname2user NEW: Secure RPC
6066 nexttoward NEW: ISO C 9x
6067 nexttowardf NEW: ISO C 9x
6068 nexttowardl NEW: ISO C 9x
6072 passwd2des NEW: Secure RPC
6074 pow10f NEW: GNU ext.
6075 pow10l NEW: GNU ext.
6078 printf_size NEW: GNU ext.
6079 printf_size_info NEW: GNU ext.
6080 profil_counter REMOVED
6081 pthread_mutexattr_getkind_np REPLACED
6082 pthread_mutexattr_setkind_np REPLACED
6083 ptsname NEW: Unix98 PTY
6084 ptsname_r NEW: Unix98 PTY
6086 putchar_locked REMOVED
6087 putgrent NEW: GNU ext.
6089 putpmsg NEW: STREAMS
6090 pututxline NEW: Unix98
6094 readdir64_r NEW: LFS
6095 remquo NEW: ISO C 9x
6096 remquof NEW: ISO C 9x
6097 remquol NEW: ISO C 9x
6099 roundf NEW: ISO C 9x
6100 roundl NEW: ISO C 9x
6102 scalbln NEW: ISO C 9x
6103 scalblnf NEW: ISO C 9x
6104 scalblnl NEW: ISO C 9x
6106 sendfile NEW: kernel
6107 setcontext NEW: Unix98
6108 setrlimit64 NEW: LFS
6109 setutxent NEW: Unix98
6111 sigignore NEW: Unix98
6112 sigqueue NEW: POSIX.1b
6113 sigrelse NEW: Unix98
6114 sigset NEW: POSIX.1b
6115 sigtimedwait NEW: POSIX.1b
6116 sigwaitinfo NEW: POSIX.1b
6117 sincos NEW: GNU ext.
6118 sincosf NEW: GNU ext.
6119 sincosl NEW: GNU ext.
6123 strcasestr NEW: GNU ext.
6124 strtoimax NEW: ISO C 9x
6125 strtoumax NEW: ISO C 9x
6126 strverscmp NEW: GNU ext.
6127 svcauthdes_stats NEW: Secure RPC
6128 svcunix_create NEW: sunrpc etx
6129 svcunixfd_create NEW: sunrpc ext
6130 swapcontext NEW: Unix98
6131 tcgetsid NEW: Unix98 PTY
6132 tdestroy NEW: GNU ext.
6133 tgamma NEW: ISO C 9x
6134 tgammaf NEW: ISO C 9x
6135 tgammal NEW: ISO C 9x
6139 truncf NEW: ISO C 9x
6140 truncl NEW: ISO C 9x
6142 unlockpt NEW: Unix98 PTY
6143 updwtmpx NEW: Unix98
6144 user2netname NEW: Secure RPC
6145 utmpxname NEW: Unix98
6146 versionsort NEW: GNU ext.
6147 versionsort64 NEW: GNU ext.
6149 wcscasecmp NEW: GNU ext.
6150 wcsncasecmp NEW: GNU ext.
6151 wcsnlen NEW: GNU ext.
6152 wcstoimax NEW: ISO C 9x
6153 wcstoll NEW: ISO C 9x
6154 wcstoull NEW: ISO C 9x
6155 wcstoumax NEW: ISO C 9x
6157 wordexp NEW: POSIX.2
6158 wordfree NEW: POSIX.2
6159 write_profiling REMOVED
6160 xdecrypt NEW: Secure RPC
6161 xdr_authdes_cred NEW: Secure RPC
6162 xdr_authdes_verf NEW: Secure RPC
6163 xdr_cryptkeyarg NEW: Secure RPC
6164 xdr_cryptkeyarg2 NEW: Secure RPC
6165 xdr_cryptkeyres NEW: Secure RPC
6166 xdr_getcredres NEW: Secure RPC
6167 xdr_key_netstarg NEW: Secure RPC
6168 xdr_key_netstres NEW: Secure RPC
6169 xdr_keybuf NEW: Secure RPC
6170 xdr_keystatus NEW: Secure RPC
6171 xdr_netnamestr NEW: Secure RPC
6172 xdr_sizeof NEW: Secure RPC
6173 xdr_unixcred NEW: sunrpc ext
6174 xencrypt NEW: Secure RPC
6175 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6186 * inet_ntoa is thread-safe
6188 * updwtmp is moved from libutil to libc
6190 * rewrite of cbrt function
6192 * update of timezone data
6206 * add atoll function
6208 * fix complex problems in Berkeley DB code
6210 * fix math functions
6214 * fixed lots of header problems (especially Linux/GNU specific)
6216 * dynamic loader preserves all registers
6218 * Roland McGrath provided support for handling of auxiliary objects in
6219 the ELF dynamic loader.
6221 * support for parallel builds is improved
6225 * GNU extensions are no longer declared by default. To enable them you
6226 must define the macro `_GNU_SOURCE' in your program or compile with
6229 * The library has changed from using GNU ld symbol aliases to using weak
6230 symbols where available. The ELF object file format supports weak
6231 symbols; GNU ld also supports weak symbols in the a.out format. (There
6232 is also now support for other GNU ld extensions in ELF. Use the
6233 `--with-elf' option to configure to indicate you have ELF, and
6234 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
6235 of many files which contained only symbol aliases, reducing the size of
6236 the source and the compiled library; many other files were renamed to
6237 less cryptic names previously occupied by the symbol alias files.
6238 There is a new header file <elf.h> for programs which operate on
6239 files in the ELF format.
6241 * Converted to Autoconf version 2, so `configure' has more options.
6242 Run `configure --help' to see the details.
6244 * The library can now be configured to build profiling, highly-optimized
6245 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
6246 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
6247 `configure' enable building these extra libraries. The shared library is
6248 built by default when using both ELF and GNU ld. When shared libraries
6249 are enabled, the new library `-ldl' is available for arbitrary run-time
6250 loading of shared objects; its interface is defined in <dlfcn.h>. The
6251 new header file <link.h> gives access to the internals of the run-time
6252 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
6253 application of same name on other systems and it provides information
6254 about dynamically linked binaries.
6256 * The C library now provides the run-time support code for profiling
6257 executables compiled with `-pg'. Programs can control the profiling code
6258 through the interface in <sys/gmon.h>. The `gmon.out' files written by
6259 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
6260 the support for this file format was contributed by David Mosberger-Tang.
6262 * The math code has been replaced with a math library based on fdlibm from
6263 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
6264 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
6265 functions. The math functions now reside in a separate library, so
6266 programs using them will need to use `-lm' their linking commands.
6268 * John C. Bowman contributed optimized ix87 assembler inline functions.
6270 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
6271 mechanism similar to that found in Solaris 2. This is now used for the
6272 group, passwd, hosts, networks, services, protocols, rpc, ethers,
6273 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
6274 file controls what services are used for each individual database. This
6275 works by loading shared libraries with names specified in `nsswitch.conf',
6276 so service modules can be changed or added at any time without even
6277 relinking any program. Currently there are the file, db, and NIS based
6278 NSS services available.
6280 * The new functions `strtoq' and `strtouq' parse integer values from
6281 strings, like `strtol' and `strtoul', but they return `long long int' and
6282 `unsigned long long int' values, respectively (64-bit quantities).
6284 * The new functions `strtof' and `strtold' parse floating-point values from
6285 strings, like `strtod', but they return `float' and `long double' values,
6286 respectively (on some machines `double' and `long double' are the same).
6288 * Ulrich Drepper has contributed new implementations of the floating-point
6289 printing and reading code used in the `printf' family of functions and
6290 `strtod', `strtof', and `strtold'. These new functions are perfectly
6291 accurate, and much faster than the old ones.
6293 * The implementation of the POSIX locale model was completely rewritten by
6294 Ulrich Drepper. This includes the new programs `localedef' and `locale'
6295 to compile the POSIX locale definition.
6297 * The former dummy implementations of the strcoll and strxfrm function are
6298 now replaced by fully functional code contributed by Ulrich Drepper. The
6299 collation information comes from the POSIX locale definitions.
6301 * The new header <langinfo.h> defines an interface for accessing
6302 various locale-dependent data (using the locale chosen with `setlocale').
6304 * Ulrich Drepper has contributed a new suite of functions for operation on
6305 wide-character and multibyte-character strings, in <wchar.h>;
6306 and classification and case conversion of wide characters, in <wctype.h>.
6307 These new functions are conforming to the ISO C, Amendement 1 specification.
6309 * There is now a second implementation of the standard I/O library available.
6310 It comes from GNU libg++ as was written by Per Bothner, heavily modified
6311 by Hongjiu Lu and made thread safe by Ulrich Drepper.
6313 * You can now use positional parameter specifications in format strings
6314 for the `printf' and `scanf' families of functions. For example,
6315 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
6316 ``Number 6, Mr Jones''. This is mainly useful when providing different
6317 format strings for different languages, whose grammars may dictate
6318 different orderings of the values being printed. To support this
6319 feature, the interface for `register_printf_handler' has changed; see
6320 the header file <printf.h> for details.
6322 * The `printf' and `scanf' families of functions now understand a new
6323 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
6324 to group numbers as indicated by the locale; for `scanf' and friends, this
6325 says to accept as valid only a number with all the proper grouping
6326 separators in the right places. In the default "C" locale, numbers are
6327 not grouped; but locales for specific countries will define the usual
6328 conventions (i.e. separate thousands with `,' in the US locale).
6330 * The pgrp functions have been regularized, slightly incompatibly but much
6331 less confusingly. The core functions are now `getpgid' and `setpgid',
6332 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
6333 argument) and BSD `setpgrp' (identical to `setpgid') functions are
6334 provided for compatibility. There is no longer an incompatible `getpgrp'
6335 with an argument declared under _BSD_SOURCE; no BSD code uses it.
6337 * The new header file <fts.h> and suite of functions simplify programs that
6338 operate on directory trees. This code comes from 4.4 BSD.
6340 * The resolver code has been updated from the BIND 4.9.5-P1 release.
6341 Parts of the code were heavily modified by Ulrich Drepper to fit in the
6342 NSS scheme used in glibc.
6344 * There is a new malloc debugging hook `__memalign_hook'.
6346 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
6347 `unsigned int' in <sys/types.h>. These are for compatibility only and
6348 their use is discouraged.
6350 * The `-lmcheck' library to enable standard malloc debugging hooks is now
6351 done differently, so that it works even without GNU ld.
6353 * New function `euidaccess' checks allowed access to a file like `access',
6354 but using the effective IDs instead of the real IDs.
6356 * The time zone data files have been updated for the latest and greatest
6357 local time conventions of the countries of the world.
6359 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
6362 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
6363 for formatting floating-point numbers. They are provided only for
6364 compatibility; new programs should use `sprintf' instead. There are
6365 also equivalent function for the `long double' floating-point type and
6366 all functions also exist in a reentrant form.
6368 * The new auxiliary library `-lutil' from 4.4 BSD contains various
6369 functions for maintaining the login-record files (primarily of use to
6370 system programs such as `login'), and convenient functions for
6371 allocating and initializing a pseudo-terminal (pty) device.
6373 * Ulrich Drepper has contributed new support for System V style
6374 shared memory and IPC on systems that support it.
6376 * Ulrich Drepper has contributed several miscellaneous new functions found
6377 in System V: The `hsearch' family of functions provide an effective
6378 implementation of hash tables; `a64l' and `l64a' provide a very simple
6379 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
6382 * Ulrich Drepper has contributed new reentrant counterparts for the
6383 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
6385 * Ulrich Drepper has contributed new, highly-optimized versions of several
6386 string functions for the i486/Pentium family of processors.
6388 * Ulrich Drepper has updated the Linux-specific code, based largely
6389 on work done in Hongjiu Lu's version of GNU libc for Linux.
6390 The GNU library now supports Linux versions 2.0.10 and later,
6391 using the ELF object file format (i[3456]86-*-linux).
6393 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
6395 * David Mosberger-Tang and Richard Henderson have ported the C library
6396 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
6397 dynamic linking support for ELF/Alpha.
6399 * Richard Henderson contributed several Alpha optimized assembler function
6400 for arithmetic and string handling.
6402 * Ulrich Drepper has contributed a new set of message catalog functions to
6403 support multiple languages using the <libintl.h> interface, for use with
6404 his new package GNU gettext. Translation volunteers have contributed
6405 catalogs of the library's messages in Spanish, German, and Korean.
6407 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
6408 program and the `catgets' function for reading the catalog files it
6409 creates. (The <libintl.h> interface is preferred; we include the
6410 <nl_types.h> interface using `catgets' only for source compatibility with
6411 programs already written to use it.)
6413 * New header file <values.h> gives SVID-compatible names for <limits.h>
6416 * Various new macros, declarations, and small header files for compatibility
6419 * New function `group_member' is a convenient way to check if a process has
6420 a given effective group ID.
6422 * When using GCC 2.7 and later, the socket functions are now declared in a
6423 special way so that passing an argument of type `struct sockaddr_in *',
6424 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
6425 `struct sockaddr *' type, does not generate a type-clash warning.
6427 * New function `error' declared in header file <error.h> is a convenient
6428 function for printing error messages and optionally exiting; this is the
6429 canonical function used in GNU programs. The new functions `err', `warn',
6430 and friends in header file <err.h> are the canonical 4.4 BSD interface for
6431 doing the same thing.
6433 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
6434 POSIX.2 `glob' function to do ~ and {...} expansion.
6436 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
6437 `clearenv' which is used in POSIX.9 is also available.
6439 * New function `getsid' returns session ID number on systems that support it.
6441 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
6442 files <db.h> and <mpool.h> provide a rich set of functions for several
6443 types of simple databases stored in memory and in files, and <ndbm.h> is
6444 an old `ndbm'-compatible interface using the `db' functions. Link with
6445 `-ldb' to get these functions.
6447 * New macro `strdupa' copies a string like `strdup', but uses local stack
6448 space from `alloca' instead of dynamic heap space from `malloc'.
6450 * New function `strnlen' is like `strlen' but searches only a given maximum
6451 number of characters for the null terminator. `stpncpy', `strndup' and
6452 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
6455 * New function `statfs' in header <sys/statfs.h>.
6457 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
6458 provide convenient functions for operating on blocks of null-terminated
6461 * A new suite of functions in <utmp.h> handle all the details of reading
6462 and writing the utmp file.
6464 * An implementation of the NIS/YP(tm) based NSS service was contributed by
6467 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
6468 completely POSIX compliant and also implemented the extended functionality
6469 to handle alternate digit representation and alternate era date formats.
6471 * Ulrich Drepper provided an implementation of the `strptime' function
6472 defined in XPG4.2 which transforms a string into a `struct tm' value.
6474 * Paul Eggert provided the tzselect shell script as part of the timezone
6475 code. The shell script makes it easy to select the correct timezone
6478 * The implementation of the malloc family of functions is completely replaced
6479 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
6480 The implementation uses the mmap function (if available) and it is
6481 optimized for the use in multi threaded programs.
6483 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
6484 functions. This new functionality is usable by specifying a special
6485 salt string and it is compatible with implementation on *BSD systems.
6487 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
6488 `getsubopt' to handle second level command line options, `bsd_signal'
6489 to access BSD style `signal' functionality, the obsolete `regexp' style
6492 * the `lchown' function is available on system which support this
6495 * The implementation of the shadow password handling function was contributed
6498 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
6500 * POSIX.1g support was added. The <sys/select.h> header is available,
6501 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
6502 implementation of `getaddrinfo'.
6506 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
6508 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
6509 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
6511 * The new function `daemon' from 4.4 BSD is useful for server programs that
6512 want to put themselves in the background.
6514 * Joel Sherrill has contributed support for several standalone boards that
6515 run without an operating system.
6517 * `printf', `scanf' and friends now accept a `q' type modifier for long
6518 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
6520 * All of the code taken from BSD (notably most of the math and networking
6521 routines) has been updated from the BSD 4.4-Lite release.
6523 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
6525 * The new functions `getdomainname' and `setdomainname' fetch or change the
6526 YP/NIS domain name. These are system calls which exist on systems which
6529 * The time zone data files have been updated for the latest international
6532 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
6533 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
6537 * The C library now includes support for Sun RPC, from Sun's free
6538 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
6539 are included. (There is still no support for YP.)
6541 * Tom Quinn has contributed a port of the C library to SGI machines running
6542 Irix 4 (mips-sgi-irix4).
6544 * The new `lockf' function is a simplified interface to the locking
6545 facilities of `fcntl', included for compatibility.
6547 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
6549 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
6551 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
6554 * The error message printed by `assert' for a failed assertion now includes
6555 the name of the program (if using GNU ld) and the name of the calling
6556 function (with versions of GCC that support this).
6558 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
6560 * The library now includes the <sys/mman.h> header file and memory
6561 management functions `mmap', `munmap', `mprotect', `msync', and
6562 `madvise', on systems that support those facilities.
6564 * The interface for `mcheck' has changed slightly: the function called to
6565 abort the program when an allocation inconsistency is detected now takes
6566 an argument that indicates the type of failure. The new function
6567 `mprobe' lets you request a consistency check for a particular block at
6568 any time (checks are normally done only when you call `free' or `realloc'
6571 * It is now possible to easily cross-compile the C library, building on one
6572 system a library to run on another machine and/or operating system. All
6573 you need to do is set the variable `HOST_CC' in `configparms' to the
6574 native compiler for programs to run on the machine you are building on (a
6575 few generator programs are used on Unix systems); set `CC' to the
6578 * The new function `fexecve' (only implemented on the GNU system) executes
6579 a program file given a file descriptor already open on the file.
6583 * Brendan Kehoe has contributed most of a port to the DEC Alpha
6584 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
6586 * You can set the variable `libprefix' in `configparms' to specify a prefix
6587 to be prepended to installed library files; this makes it easy to install
6588 the GNU C library to be linked as `-lgnuc' or whatever.
6590 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
6591 copies a limited number of characters from a string, and returns the
6592 address of the last character written.
6594 * You no longer need to check for whether the installed `stddef.h' is
6595 compatible with the GNU C library. configure now checks for you.
6597 * You can now define a per-stream `fileno' function to convert the
6598 stream's cookie into an integral file descriptor.
6600 * ``malloc (0)'' no longer returns a null pointer. Instead, it
6601 allocates zero bytes of storage, and returns a unique pointer which
6602 you can pass to `realloc' or `free'. The behavior is undefined if
6603 you dereference this pointer.
6605 * The C library now runs on Sony NEWS m68k machines running either
6606 NewsOS 3 or NewsOS 4.
6608 * The new `syscall' function is a system-dependent primitive function
6609 for invoking system calls. It has the canonical behavior on Unix
6610 systems, including unreliable return values for some calls (such as
6611 `pipe', `fork' and `getppid').
6613 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
6614 to `EAGAIN', which is the preferred name. On systems whose kernels
6615 use two distinct codes, the C library now translates EWOULDBLOCK to
6616 EAGAIN in every system call function.
6620 * The GNU C Library Reference Manual is now distributed with the library.
6621 `make dvi' will produce a DVI file of the printed manual.
6622 `make info' will produce Info files that you can read on line using C-h i
6623 in Emacs or the `info' program.
6624 Please send comments on the manual to bug-glibc-manual@gnu.org.
6626 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
6628 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
6630 * Jason Merrill has contributed a port to the Sequent Symmetry running
6631 Dynix version 3 (i386-sequent-dynix).
6633 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
6634 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
6636 * New function `memory_warnings' lets you arrange to get warnings when
6637 malloc is running out of memory to allocate, like Emacs gives you.
6639 * The C library now contains the relocating allocator used in Emacs 19 for
6640 its editing buffers. This allocator (ralloc) minimizes allocation
6641 overhead and fragmentation by moving allocated regions around whenever it
6642 needs to. You always refer to a ralloc'd region with a "handle" (a
6643 pointer to a pointer--an object of type `void **').
6645 * There is a new `printf' format: `%m' gives you the string corresponding
6646 to the error code in `errno'.
6648 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
6649 or `%[' conversion, but instead of filling in a fixed-sized buffer you
6650 pass, the `a' modifier says to fill in a `char **' you pass with a
6653 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
6654 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
6655 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
6657 * `mkstemp' is a traditional Unix function to atomically create and open a
6658 uniquely-named temporary file.
6662 * The standard location for the file that says what the local timezone is
6663 has changed again. It is now `/usr/local/etc/localtime' (or more
6664 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
6666 * The distribution no longer contains any files with names longer than 14
6669 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
6670 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
6672 * New functions `ttyslot' and `syslog' from 4.4 BSD.
6676 * The configuration process has changed quite a bit. The `configure'
6677 script is now used just like the configuration scripts for other GNU
6678 packages. The `sysdeps' directory hierarchy is much rearranged.
6679 The file `INSTALL' explains the new scheme in detail.
6681 * The header files no longer need to be processed into ANSI C and
6682 traditional C versions. There is just one set of files to install, and
6683 it will work with ANSI or old C compilers (including `gcc -traditional').
6685 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
6686 MIPS DECStation running Ultrix 4.
6688 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
6689 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
6690 made itself into a shared library.
6692 * Yet further improved support for the i386, running 4.3 BSD-like systems
6693 (such as Mach 3 with the Unix single-server), or System V.
6695 * New function `strncasecmp' to do case-insensitive string comparison
6696 with limited length.
6698 * New function `strsep' is a reentrant alternative to `strtok'.
6700 * New functions `scandir' and `alphasort' for searching directories.
6702 * New function `setenv' is a better interface to `putenv'.
6704 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
6705 function for traversing a directory tree.
6707 * The GNU obstack package is now also part of the C library.
6708 The new function `open_obstack_stream' creates a stdio stream that
6709 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
6710 formatted output directly to an obstack.
6712 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
6713 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
6715 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
6717 * The new functions `strfry' and `memfrob' do mysterious and wonderful
6718 things to your strings.
6720 * There are some new test programs: test-fseek, testmb, and testrand.
6722 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
6723 These ports are not finished, but are a good starting place for really
6724 supporting those systems.
6726 * `/etc/localtime' is now the standard location for the file that says what
6727 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
6728 This follows the general principle that `/etc' is the place for all local
6729 configuration files.
6731 * The C library header files now use `extern "C"' when used by the C++
6732 compiler, so the C library should now work with C++ code.
6734 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
6735 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
6738 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
6739 function which uses the `merge sort' algorithm, and is said to be
6740 significantly faster than the old GNU `qsort' function. Merge sort is
6741 now the standard `qsort' function. The new algorithm can require a lot
6742 of temporary storage; so, the old sorting function is called when the
6743 required storage is not available.
6745 * The C library now includes Michael Glad's Ultra Fast Crypt, which
6746 provides the Unix `crypt' function, plus some other entry points.
6748 * The code and header files taken from 4.4 BSD have been updated with the
6749 latest files released from Berkeley.
6751 ----------------------------------------------------------------------
6754 Permission is granted to anyone to make or distribute verbatim copies
6755 of this document as received, in any medium, provided that the
6756 copyright notice and this permission notice are preserved,
6757 thus giving the recipient permission to redistribute in turn.
6759 Permission is granted to distribute modified versions
6760 of this document, or of portions of it,
6761 under the above conditions, provided also that they
6762 carry prominent notices stating who last changed them.
6765 version-control: never