1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2020 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 [Add new features here]
14 Deprecated and removed features, and other changes affecting compatibility:
16 [Add deprecations, removals and changes affecting compatibility here]
18 Changes to build and runtime requirements:
20 [Add changes to build and runtime requirements here]
22 Security related changes:
24 [Add security related changes here]
26 The following bugs are resolved with this release:
28 [The release manager will add the list generated by
29 scripts/list-fixed-bugs.py just before the release.]
36 * Unicode 13.0.0 Support: Character encoding, character type info, and
37 transliteration tables are all updated to Unicode 13.0.0, using
38 generator scripts contributed by Mike FABIAN (Red Hat).
40 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
42 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
43 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
44 Three ABIs are supported:
50 The arc* ABI is little-endian while arceb is big-endian. All ABIs use
51 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
53 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
54 DT_DEPAUDIT dynamic section entries of the main executable.
56 * powerpc64le supports IEEE128 long double libm/libc redirects when
57 using the -mabi=ieeelongdouble to compile C code on supported GCC
58 toolchains. It is recommended to use GCC 8 or newer when testing
61 * To help detect buffer overflows and other out-of-bounds accesses
62 several APIs have been annotated with GCC 'access' attribute. This
63 should help GCC 10 issue better warnings.
65 * On Linux, functions the pthread_attr_setsigmask_np and
66 pthread_attr_getsigmask_np have been added. They allow applications
67 to specify the signal mask of a thread created with pthread_create.
69 * The GNU C Library now provides the header file <sys/single_threaded.h>
70 which declares the variable __libc_single_threaded. Applications are
71 encouraged to use this variable for single-thread optimizations,
72 instead of weak references to symbols historically defined in
75 * The functions sigabbrev_np and sigdescr_np have been added. The
76 sigabbrev_np returns the abbreviated signal name (e.g. "HUP" for SIGHUP)
77 while sigdescr_np returns a string describing the signal number (e.g
78 "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
79 attempt to translate the return description, both functions return
80 NULL for an invalid signal number.
82 They should be used instead of sys_siglist or sys_sigabbrev and they
83 are both thread and async-signal safe. These functions are GNU extensions.
85 * The functions strerrorname_np and strerrordesc_np have been added. The
86 strerroname_np returns error number name (e.g. "EINVAL" for EINVAL) while
87 strerrordesc_np returns string describing error number
88 (e.g "Invalid argument" for EINVAL). Different than strerror,
89 strerrordesc_np does not attempt to translate the return description, both
90 functions return NULL for an invalid error number.
92 They should be used instead of sys_errlist and sys_nerr, both are
93 thread and async-signal safe. These functions are GNU extensions.
95 * AArch64 now supports standard branch protection security hardening
96 in glibc when it is built with a GCC that is configured with
97 --enable-standard-branch-protection (or if -mbranch-protection=standard
98 flag is passed when building both GCC target libraries and glibc,
99 in either case a custom GCC is needed). This includes branch target
100 identification (BTI) and pointer authentication for return addresses
101 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
102 extensions respectively for the protection to be effective,
103 otherwise the used instructions are nops. User code can use PAC-RET
104 without libc support, but BTI requires a libc that is built with BTI
105 support, otherwise runtime objects linked into user code will not be
108 Deprecated and removed features, and other changes affecting compatibility:
110 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
111 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
112 RPC header files. Backward compatibility for old programs is kept
113 only for architectures and ABIs that have been added in or before
114 glibc 2.31. New programs need to use TI-RPC
115 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
116 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
118 * Remove configure option --enable-obsolete-nsl. libnsl is only built
119 as shared library for backward compatibility and the NSS modules "nis"
120 and "nisplus" are not built at all and libnsl's headers aren't
121 installed. This compatibility is kept only for architectures and ABIs
122 that have been added in or before version 2.28. Replacement
123 implementations based on TI-RPC, which additionally support IPv6, are
124 available from <https://github.com/thkukuk/>. This change does not
125 affect the "compat" NSS module, which does not depended on libnsl
126 since 2.27 and thus can be used without NIS.
128 * The deprecated <sys/sysctl.h> header and the sysctl function have been
129 removed. To support old binaries, the sysctl function continues to
130 exist as a compatibility symbol (on those architectures which had it),
131 but always fails with ENOSYS. This reflects the removal of the system
132 call from all architectures, starting with Linux 5.5.
134 * The sstk function is no longer available to newly linked binaries.
135 Its implementation always returned with a failure, and the function
136 was not declared in any header file.
138 * The legacy signal handling functions siginterrupt, sigpause, sighold,
139 sigrelse, sigignore and sigset, and the sigmask macro have been
140 deprecated. Applications should use the sigsuspend, sigprocmask and
141 sigaction functions instead.
143 * ldconfig now defaults to the new format for ld.so.cache. glibc has
144 already supported this format for almost 20 years.
146 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
147 are no longer available to newly linked binaries, and their declarations
148 have been removed from <string.h>. They are exported solely as
149 compatibility symbols to support old binaries. All programs should use
152 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
153 are no longer available to newly linked binaries, and their declarations
154 have been removed from from <stdio.h>. They are exported solely as
155 compatibility symbols to support old binaries. All programs should use
156 strerror or strerror_r instead.
158 * Both strerror and strerror_l now share the same internal buffer in the
159 calling thread, meaning that the returned string pointer may be invalided
160 or contents might be overwritten on subsequent calls in the same thread or
161 if the thread is terminated. It makes strerror MT-safe.
163 * Using weak references to libpthread functions such as pthread_create
164 or pthread_key_create to detect the singled-threaded nature of a
165 program is an obsolescent feature. Future versions of glibc will
166 define pthread_create within libc.so.6 itself, so such checks will
167 always flag the program as multi-threaded. Applications should check
168 the __libc_single_threaded variable declared in
169 <sys/single_threaded.h> instead.
171 * The "files" NSS module no longer supports the "key" database (used for
172 secure RPC). The contents of the /etc/publickey file will be ignored,
173 regardless of the settings in /etc/nsswitch.conf. (This method of
174 storing RPC keys only supported the obsolete and insecure AUTH_DES
175 flavor of secure RPC.)
177 * The __morecore and __after_morecore_hook malloc hooks and the default
178 implementation __default_morecore have been deprecated. Applications
179 should use malloc interposition to change malloc behavior, and mmap to
180 allocate anonymous memory. A future version of glibc may require that
181 applications which use the malloc hooks must preload a special shared
182 object, to enable the hooks.
184 * The hesiod NSS module has been deprecated and will be removed in a
185 future version of glibc. System administrators are encouraged to
186 switch to other approaches for networked account databases, such as
189 Changes to build and runtime requirements:
191 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
192 long double redirects.
194 Security related changes:
196 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
197 invoked with the -c option and when processing invalid multi-byte input
198 sequences. Reported by Jan Engelhardt.
200 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
201 corruption when they were passed a pseudo-zero argument. Reported by Guido
202 Vranken / ForAllSecure Mayhem.
204 CVE-2020-1752: A use-after-free vulnerability in the glob function when
205 expanding ~user has been fixed.
207 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
208 memmove functions has been fixed. Discovered by Jason Royes and Samual
209 Dytrych of the Cisco Security Assessment and Penetration Team (See
212 The following bugs are resolved with this release:
214 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
215 [10441] manual: Backtraces code example lacks error checking
216 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
217 timer_sigev_thread dangerous
218 [14231] stdio: stdio-common tests memory requirements
219 [14578] libc: /proc-based emulation for lchmod, fchmodat
220 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
221 filtee has constructor
222 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
223 sequences (CVE-2016-10228)
224 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
225 character entities for infinity & pi
226 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
227 segfaults in applications
228 [20543] libc: Please move from .gnu.linkonce to comdat
229 [22489] network: gcc warns about implicit convertion in
230 ICMP6_FILTER_SETPASS with -Wsign-conversion
231 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
232 [23294] math: Complex _FloatN functions are redirected to the wrong
233 function with -mlong-double-64
234 [23296] libc: Data race in setting function descriptor during lazy
236 [23668] dynamic-link: ldconfig: Default to the new format for
238 [23819] hurd: hurd: Add C11 thread support
239 [23990] build: test-container error out on failure to exec child.
240 [23991] build: shell-container typo in run_command_array
241 [24638] manual: Error in example of parsing a template string
242 [24654] manual: Wrong declaration of wcschr in libc manual
243 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
245 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
246 dynamically loaded dsos
247 [25098] nptl: nptl: ctype classification functions are not AS-Safe
248 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
250 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
251 restore EAX, ECX and EDX
252 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
253 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
254 [25420] network: Race condition in resolv_conf.c can result in caching
255 stale configuration forever
256 [25487] math: sinl() stack corruption from crafted input
258 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
260 [25523] libc: MIPS/Linux inline syscall template is miscompiled
261 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
263 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
264 on 32 bit and old kernel
265 [25635] libc: arm: Wrong sysdep order selection for soft-fp
266 [25639] localedata: Some names of days and months wrongly spelt in
268 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
269 amount of sigset_t bytes
270 [25691] stdio: printf: memory leak when printing long multibyte
272 [25715] libc: system() returns wrong errors when posix_spawn fails
273 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
274 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
275 state for conversions that produce two Unicode code points
276 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
277 for linux x86_64 leads to livelock
278 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
279 test failures, invalid instruction in ld.so
280 [25790] glob: Typo in tst-fnmatch.input
281 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
283 [25819] localedata: Update locale data to Unicode 13.0.0
284 [25824] libc: Abnormal function of strnlen in aarch64
285 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
286 [25896] libc: Incorrect prctl
287 [25902] libc: Bad LOADARGS_N
288 [25905] dynamic-link: VSX registers are corrupted during PLT
289 resolution when glibc is built with --disable-multi-arch and --with-
291 [25933] string: Off by one error in __strncmp_avx2 when
292 length=VEC_SIZE*4 and strings are at page boundaries can cause a
294 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
295 exiting detached thread
296 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
298 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
300 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
301 [26073] math: getpayload() has wrong return value
302 [26076] dynamic-link: dlmopen crashes after failing to load
303 dependencies in audit mode
304 [26120] localedata: column width of of some Korean
305 JUNGSEONG/JONGSEONG characters wrong (should be 0)
306 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
307 [26133] libc: Incorrect need_arch_feature_F16C
308 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
310 [26149] libc: PKU is usable only if OSPKE is set
311 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
313 [26208] libc: Incorrect bit_cpu_CLFSH
314 [26210] network: Incorrect use of hidden symbols for global sunrpc
316 [26211] stdio: printf integer overflow calculating allocation size
317 [26214] stdio: printf_fp double free
318 [26215] stdio: printf_fp memory leak
319 [26232] time: FAIL: support/tst-timespec for 32-bit targets
320 [26258] nss: nss_compat should not read input files with mmap
321 [26332] string: Incorrect cache line size load causes memory
329 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
330 enable features from the draft ISO C2X standard. Only some features from
331 this draft standard are supported by the GNU C Library, and as the draft
332 is under active development, the set of features enabled by this macro is
333 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
334 by compiling with "gcc -std=gnu2x".
336 * The <math.h> functions that round their results to a narrower type now
337 have corresponding type-generic macros in <tgmath.h>, as defined in TS
338 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
339 Clarification Request 13 to TS 18661-3.
341 * The function pthread_clockjoin_np has been added, enabling join with a
342 terminated thread with a specific clock. It allows waiting against
343 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
345 * New locale added: mnw_MM (Mon language spoken in Myanmar).
347 * The DNS stub resolver will optionally send the AD (authenticated data) bit
348 in queries if the trust-ad option is set via the options directive in
349 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
350 mode, the AD bit, as provided by the name server, is available to
351 applications which call res_search and related functions. In the default
352 mode, the AD bit is not set in queries, and it is automatically cleared in
353 responses, indicating a lack of DNSSEC validation. (Therefore, the name
354 servers and the network path to them are treated as untrusted.)
356 Deprecated and removed features, and other changes affecting compatibility:
358 * The totalorder and totalordermag functions, and the corresponding
359 functions for other floating-point types, now take pointer arguments to
360 avoid signaling NaNs possibly being converted to quiet NaNs in argument
361 passing. This is in accordance with the resolution of Clarification
362 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
363 floating-point arguments directly will continue to work.
365 * The obsolete function stime is no longer available to newly linked
366 binaries, and its declaration has been removed from <time.h>.
367 Programs that set the system time should use clock_settime instead.
369 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
370 in a future version of glibc. In this release, the header still exists
371 but calling ftime will cause a compiler warning. All programs should use
372 gettimeofday or clock_gettime instead.
374 * The gettimeofday function no longer reports information about a
375 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
376 many years, as it cannot handle the full complexity of the world's
377 timezones, but hitherto we have supported it on a best-effort basis.
378 Changes required to support 64-bit time_t on 32-bit architectures have
379 made this no longer practical.
381 As of this release, callers of gettimeofday with a non-null 'tzp' argument
382 should expect to receive a 'struct timezone' whose tz_minuteswest and
383 tz_dsttime fields are zero. (For efficiency reasons, this does not always
384 happen on a few Linux-based ports. This will be corrected in a future
387 All callers should supply a null pointer for the 'tzp' argument to
388 gettimeofday. For accurate information about the time zone associated
389 with the current time, use the localtime function.
391 gettimeofday itself is obsolescent according to POSIX. We have no plans
392 to remove access to this function, but portable programs should consider
393 using clock_gettime instead.
395 * The settimeofday function can still be used to set a system-wide time
396 zone when the operating system supports it. This is because the Linux
397 kernel reused the API, on some architectures, to describe a system-wide
398 time-zone-like offset between the software clock maintained by the kernel,
399 and the "RTC" clock that keeps time when the system is shut down.
401 However, to reduce the odds of this offset being set by accident,
402 settimeofday can no longer be used to set the time and the offset
403 simultaneously. If both of its two arguments are non-null, the call
404 will fail (setting errno to EINVAL).
406 Callers attempting to set this offset should also be prepared for the call
407 to fail and set errno to ENOSYS; this already happens on the Hurd and on
408 some Linux architectures. The Linux kernel maintainers are discussing a
409 more principled replacement for the reused API. After a replacement
410 becomes available, we will change settimeofday to fail with ENOSYS on all
411 platforms when its 'tzp' argument is not a null pointer.
413 settimeofday itself is obsolescent according to POSIX. Programs that set
414 the system time should use clock_settime and/or the adjtime family of
415 functions instead. We may cease to make settimeofday available to newly
416 linked binaries after there is a replacement for Linux's time-zone-like
419 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
420 the optional CAS instruction is implemented (for instance, LEON processors
421 are still supported, but SuperSPARC processors are not).
423 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
426 * If a lazy binding failure happens during dlopen, during the execution of
427 an ELF constructor, the process is now terminated. Previously, the
428 dynamic loader would return NULL from dlopen, with the lazy binding error
429 captured in a dlerror message. In general, this is unsafe because
430 resetting the stack in an arbitrary function call is not possible.
432 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
433 executable stack unless explicitly configured at build time to require
434 minimum kernel version 4.8 or newer. This is because executing
435 floating-point branches on a non-executable stack on Linux kernels prior to
436 4.8 can lead to application crashes for some MIPS configurations. While
437 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
438 expected to enable non-executable stack by default with PT_GNU_STACK by
439 default and is thus likely to trigger a crash on older kernels.
441 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
442 non-executable stack while dropping support for older kernels.
444 * System call wrappers for time system calls now use the new time64 system
445 calls when available. On 32-bit targets, these wrappers attempt to call
446 the new system calls first and fall back to the older 32-bit time system
447 calls if they are not present. This may cause issues in environments
448 that cannot handle unsupported system calls gracefully by returning
449 -ENOSYS. Seccomp sandboxes are affected by this issue.
451 Changes to build and runtime requirements:
453 * It is no longer necessary to have recent Linux kernel headers to build
454 working (non-stub) system call wrappers on all architectures except 64-bit
455 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
457 * The ChangeLog file is no longer present in the toplevel directory of the
458 source tree. ChangeLog files are located in the ChangeLog.old directory as
459 ChangeLog.N where the highest N has the latest entries.
461 Security related changes:
463 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
464 out-of-bounds write when executed in a signal frame context.
466 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
467 environment variable during program execution after a security
468 transition, allowing local attackers to restrict the possible mapping
469 addresses for loaded libraries and thus bypass ASLR for a setuid
470 program. Reported by Marcin Kościelnicki.
472 The following bugs are resolved with this release:
474 [12031] localedata: iconv -t ascii//translit with Greek characters
475 [15813] libc: Multiple issues in __gen_tempname
476 [17726] libc: [arm, sparc] profil_counter should be compat symbol
477 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
478 [19767] libc: vdso is not used with static linking
479 [19903] hurd: Shared mappings not being inherited by children processes
480 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
481 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
483 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
484 Symbols-A/B Unicode blocks
485 [23518] libc: Eliminate __libc_utmp_jump_table
486 [24026] malloc: malloc_info() returns wrong numbers
487 [24054] localedata: Many locales are missing date_fmt
488 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
489 [24304] dynamic-link: Lazy binding failure during ELF
490 constructors/destructors is not fatal
491 [24376] libc: RISC-V symbol size confusion with _start
492 [24682] localedata: zh_CN first weekday should be Monday per GB/T
494 [24824] libc: test-in-container does not install charmap files compatible
496 [24844] regex: regex bad pointer / leakage if malloc fails
497 [24867] malloc: Unintended malloc_info formatting changes
498 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
499 [24880] libc: login: utmp implementation uses struct flock with fcntl64
500 [24882] libc: login: pututline uses potentially outdated cache
501 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
502 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
504 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
506 [24930] dynamic-link: dlopen of PIE executable can result in
507 _dl_allocate_tls_init assertion failure
508 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
509 (stringop-overflow error)
510 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
511 functions other can lead to crashes
512 [24967] libc: jemalloc static linking causes runtime failure
513 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
515 [25035] libc: sbrk() failure handled poorly in tunables_strdup
516 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
517 [25097] libc: new -Warray-bounds with GCC 10
518 [25112] dynamic-link: dlopen must not make new objects accessible when it
519 still can fail with an error
520 [25139] localedata: Please add the new mnw_MM locale
521 [25149] regex: Array bounds violation in proceed_next_node
522 [25157] dynamic-link: Audit cookie for the dynamic loader is not
523 initialized correctly
524 [25189] libc: glibc's __glibc_has_include causes issues with clang
526 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
528 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
529 binaries (CVE-2019-19126)
530 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
532 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
534 [25232] string: <string.h> does not enable const correctness for strchr et
536 [25233] localedata: Consider "." as the thousands separator for sl_SI
538 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
539 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
540 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
542 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
543 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
545 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
546 (dl_initfirst) link map pointer
547 [25401] malloc: pvalloc must not have __attribute_alloc_size__
548 [25423] libc: Array overflow in backtrace on powerpc
549 [25425] network: Missing call to __resolv_context_put in
550 getaddrinfo.c:gethosts
557 * Unicode 12.1.0 Support: Character encoding, character type info, and
558 transliteration tables are all updated to Unicode 12.1.0, using
559 generator scripts contributed by Mike FABIAN (Red Hat).
561 * The dynamic linker accepts the --preload argument to preload shared
562 objects, in addition to the LD_PRELOAD environment variable.
564 * The twalk_r function has been added. It is similar to the existing
565 twalk function, but it passes an additional caller-supplied argument
566 to the callback function.
568 * On Linux, the getdents64, gettid, and tgkill functions have been added.
570 * Minguo (Republic of China) calendar support has been added as an
571 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
574 * The entry for the new Japanese era has been added for ja_JP locale.
576 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
577 pvalloc, memalign, and posix_memalign fail now with total object size
578 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
579 pointer subtraction within the allocated object, where results might
580 overflow the ptrdiff_t type.
582 * The dynamic linker no longer refuses to load objects which reference
583 versioned symbols whose implementation has moved to a different soname
584 since the object has been linked. The old error message, symbol
585 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
586 link time reference, is gone.
588 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
589 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
590 functions. These behave similarly to their "timed" equivalents, but also
591 accept a clockid_t parameter to determine which clock their timeout should
592 be measured against. All functions allow waiting against CLOCK_MONOTONIC
593 and CLOCK_REALTIME. The decision of which clock to be used is made at the
594 time of the wait (unlike with pthread_condattr_setclock, which requires
595 the clock choice at initialization time).
597 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
598 work, new resolvers can use a second argument which can be extended in
599 the future, currently it contains the AT_HWCAP2 value.
601 Deprecated and removed features, and other changes affecting compatibility:
603 * The copy_file_range function fails with ENOSYS if the kernel does not
604 support the system call of the same name. Previously, user space
605 emulation was performed, but its behavior did not match the kernel
606 behavior, which was deemed too confusing. Applications which use the
607 copy_file_range function can no longer rely on glibc to provide a fallback
608 on kernels that do not support the copy_file_range system call, and if
609 this function returns ENOSYS, they will need to use their own fallback.
610 Support for copy_file_range for most architectures was added in version
611 4.5 of the mainline Linux kernel.
613 * The functions clock_gettime, clock_getres, clock_settime,
614 clock_getcpuclockid, clock_nanosleep were removed from the librt library
615 for new applications (on architectures which had them). Instead, the
616 definitions in libc will be used automatically, which have been available
619 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
620 and <sys/stropts.h> have been removed.
622 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
623 resolver flag (deprecated in glibc 2.25) have been removed.
625 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
626 resolver have been removed from <resolv.h>.
628 * With --enable-bind-now, installed programs are now linked with the
631 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
632 configurations) has been removed, following the deprecation of this
633 subarchitecture in version 8 of GCC, and its removal in version 9.
635 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
636 header have been removed.
638 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
639 deprecated and will be removed from a future version of glibc.
640 Application should directly access /proc instead. For obtaining random
641 bits, the getentropy function can be used.
643 Changes to build and runtime requirements:
645 * GCC 6.2 or later is required to build the GNU C Library.
647 Older GCC versions and non-GNU compilers are still supported when
648 compiling programs that use the GNU C Library.
650 Security related changes:
652 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
653 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
654 has undefined behavior. On x32, the size_t argument may be passed
655 in the lower 32 bits of the 64-bit RDX register with non-zero upper
656 32 bits. When it happened with the sign bit of RDX register set,
657 memcmp gave the wrong result since it treated the size argument as
658 zero. Reported by H.J. Lu.
660 CVE-2019-9169: Attempted case-insensitive regular-expression match
661 via proceed_next_node in posix/regexec.c leads to heap-based buffer
662 over-read. Reported by Hongxu Chen.
664 The following bugs are resolved with this release:
666 [2872] locale: Transliteration Cyrillic -> ASCII fails
667 [6399] libc: gettid() should have a wrapper
668 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
669 [16976] glob: fnmatch unbounded stack VLA for collating symbols
670 [17396] localedata: globbing for locale by [[.collating-element.]]
671 [18035] dynamic-link: pldd does no longer work, enters infinite loop
672 [18465] malloc: memusagestat is built using system C library
673 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
674 invalid input drops valid char
675 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
676 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
677 [21897] localedata: Afar locales: Fix mon, abmon, and abday
678 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
679 [23352] malloc: __malloc_check_init still defined in public header
681 [23403] nptl: Wrong alignment of TLS variables
682 [23501] libc: nftw() doesn't return dangling symlink's inode
683 [23733] malloc: Check the count before calling tcache_get()
684 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
686 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
687 [23844] nptl: pthread_rwlock_trywrlock results in hang
688 [23983] argparse: Missing compat versions of argp_failure and argp_error
689 for long double = double
690 [23984] libc: Missing compat versions of err.h and error.h functions for
692 [23996] localedata: Dutch salutations
693 [24040] libc: riscv64: unterminated call chain in __thread_start
694 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
696 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
697 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
699 [24114] regex: regexec buffer read overrun in "grep -i
700 '\(\(\)*.\)*\(\)\(\)\1'"
701 [24122] libc: Segfaults if 0 returned from la_version
702 [24153] stdio: Some input functions do not react to stdin assignment
703 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
704 RDX is set) (CVE-2019-7309)
705 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
706 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
707 not the default "nor"
708 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
709 false positives, change to modern flexible array
710 [24180] nptl: pthread_mutex_trylock does not use the correct order of
711 instructions while maintaining the robust mutex list due to missing
713 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
714 unnecessary librt dependencies
715 [24200] localedata: Revert first_weekday removal in en_IE locale
716 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
717 [24215] nptl: pthread_timedjoin_np should be a cancellation point
718 [24216] malloc: Check for large bin list corruption when inserting
720 [24228] stdio: old x86 applications that use legacy libio crash on exit
721 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
723 [24293] localedata: Missing Minguo calendar support for TW locales
724 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
726 [24307] localedata: Update locale data to Unicode 12.0.0
727 [24323] dynamic-link: dlopen should not be able open PIE objects
728 [24335] build: "Obsolete types detected" with Linux 5.0 headers
729 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
731 [24370] localedata: Add lang_name for tt_RU locale
732 [24372] locale: Binary locale files are not architecture independent
733 [24394] time: strptime %Ey mis-parses final year of era
734 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
736 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
738 [24531] malloc: Malloc tunables give tcache assertion failures
739 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
741 [24535] localedata: Update locale data to Unicode 12.1.0
742 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
743 kernels and break testing
744 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
745 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
746 [-Werror=format-overflow=]
747 [24570] libc: alpha: compat msgctl uses __IPC_64
748 [24584] locale: Data race in __wcsmbs_clone_conv
749 [24588] stdio: Remove codecvt vtables from libio
750 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
752 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
753 [24632] stdio: Old binaries which use freopen with default stdio handles
755 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
757 [24652] localedata: szl_PL spelling correction
758 [24695] nss: nss_db: calling getpwent after endpwent crashes
759 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
760 in /etc/nsswitch.conf
761 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
762 [24740] libc: getdents64 type confusion
763 [24741] dynamic-link: ld.so should not require that a versioned symbol is
764 always implemented in the same library
765 [24744] libc: Remove copy_file_range emulation
766 [24757] malloc: memusagestat is linked against system libpthread
767 [24794] libc: Partial test suite run builds corrupt test-in-container
775 * The getcpu wrapper function has been added, which returns the currently
776 used CPU and NUMA node. This function is Linux-specific.
778 * A new convenience target has been added for distribution maintainers
779 to build and install all locales as directories with files. The new
780 target is run by issuing the following command in your build tree:
781 'make localedata/install-locale-files', with an optional DESTDIR
782 to set the install root if you wish to install into a non-default
785 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
787 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
788 for _GNU_SOURCE, to match BSD environments.
790 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
791 indicates that it will abort the transaction prior to entering the kernel
792 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
793 suspended, and this caused some undefined side-effects issues by aborting
794 transactions manually. Glibc avoided it by abort transactions manually on
795 each syscall, but it lead to performance issues on newer kernels where the
796 HTM state is saved and restore lazily (the state being saved even when the
797 process actually does not use HTM).
799 * The functions posix_spawn_file_actions_addchdir_np and
800 posix_spawn_file_actions_addfchdir_np have been added, enabling
801 posix_spawn and posix_spawnp to run the new process in a different
802 directory. These functions are GNU extensions. The function
803 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
806 * The popen and system do not run atfork handlers anymore (BZ#17490).
807 Although it is a possible POSIX violation, the POSIX rationale in
808 pthread_atfork documentation regarding atfork handlers is to handle
809 inconsistent mutex state after a fork call in a multi-threaded process.
810 In both popen and system there is no direct access to user-defined mutexes.
812 * Support for the C-SKY ABIV2 running on Linux has been added. This port
813 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
815 - C-SKY ABIV2 soft-float little-endian
816 - C-SKY ABIV2 hard-float little-endian
818 * strftime's default formatting of a locale's alternative year (%Ey)
819 has been changed to zero-pad the year to a minimum of two digits,
820 like "%y". This improves the display of Japanese era years during
821 the first nine years of a new era, and is expected to be harmless
822 for all other locales (only Japanese locales regularly have
823 alternative year numbers less than 10). Zero-padding can be
824 overridden with the '_' or '-' flags (which are GNU extensions).
826 * As a GNU extension, the '_' and '-' flags can now be applied to
827 "%EY" to control how the year number is formatted; they have the
828 same effect that they would on "%Ey".
830 Deprecated and removed features, and other changes affecting compatibility:
832 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
833 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
835 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
836 in <sys/procfs.h>, has been corrected to match the type actually used by
837 the Linux kernel. This affects the size and layout of that structure on
838 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
840 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
841 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
842 defined in <sys/procfs.h>, has been corrected to match the type actually
843 used by the Linux kernel. This affects the size and layout of those
846 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
847 meant to scan a string and allocate space for it with malloc, is now
848 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
849 defined. This extension conflicts with C99's use of '%a' to scan a
850 hexadecimal floating-point number, which is now available to programs
851 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
853 POSIX.1-2008 includes the feature of allocating a buffer for string input
854 with malloc, using the modifier letter 'm' instead. Programs using
855 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
856 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
857 C99 '%a' no longer need to avoid _GNU_SOURCE.
859 GCC's -Wformat warnings can detect most uses of this extension, as long
860 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
861 __attribute__ ((format (scanf, ...))).
863 Changes to build and runtime requirements:
865 * Python 3.4 or later is required to build the GNU C Library.
867 * On most architectures, GCC 5 or later is required to build the GNU C
868 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
870 Older GCC versions and non-GNU compilers are still supported when
871 compiling programs that use the GNU C Library.
873 Security related changes:
875 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
876 denial of service due to resource exhaustion when processing getaddrinfo
877 calls with crafted host names. Reported by Guido Vranken.
879 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
880 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
881 happened, accessing the 32-bit size_t value as the full 64-bit register
882 in the assembly string/memory functions would cause a buffer overflow.
885 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
886 addresses with arbitrary trailing characters, potentially leading to data
887 or command injection issues in applications.
889 The following bugs are resolved with this release:
891 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
892 [10496] localedata: 12h time representation in multiple locales faulty
893 [10797] localedata: it_IT locale numeric does not have a separator for
895 [11319] libc: dprintf doesn't handle errors properly
896 [16346] time: mktime: potentially unsafe use of localtime_offset
897 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
899 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
900 posix_spawn_file_actions_addfchdir_np
901 [17426] localedata: Indian locales: set the correct date format
902 [17490] stdio: popen should not invoke atfork handlers
903 [17783] libc: TIOCSER_TEMT conditions inconsistent
904 [18040] regex: use-after-free in regexec/get_subexp
905 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
906 [20018] network: getaddrinfo should reject IP addresses with trailing
907 characters (CVE-2016-10739)
908 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
909 [20271] libc: Missing "\n" in __libc_fatal calls
910 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
911 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
912 pointer argument is non-NULL
913 [21037] stdio: open_memstream and freopen
914 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
915 [21716] time: Crash in glibc's mktime in low-memory situations
916 [22834] stdio: Subprocess forked by popen may crash in Linux when
917 multithreads call popen
918 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
919 and pthread_create fails.
920 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
921 [23125] libc: riscv64: endless loop when throwing an exception from a
923 [23275] nptl: Race in pthread_mutex_lock while promoting to
924 PTHREAD_MUTEX_ELISION_NP.
925 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
927 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
929 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
931 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
932 [23509] dynamic-link: CET enabled glibc is incompatible with the older
934 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
935 [23521] nss: get_next_alias nss_files file stream leak
936 [23538] nptl: Hang in pthread_cond_broadcast
937 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
938 [23578] regex: Invalid memory access if regex pattern contains NUL byte
939 [23579] libc: Errors misreported in preadv2
940 [23597] build: support/test-container.c doesn't work with different
942 [23603] time: mktime signed integer overflow on large timestamps
943 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
944 [23614] libc: powerpc: missing CFI register information in __mpn_*
946 [23637] string: Generic strstr/strcasestr fails with huge needles
947 [23640] libc: no way to easily clear FD_CLOEXEC in
948 posix_spawn_file_actions_adddup2()
949 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
951 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
953 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
954 [23689] libc: Bug in documentation for rusage.ru_ixrss in
955 bits/types/struct_rusage.h
956 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
958 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
960 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
961 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
962 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
964 [23724] localedata: Albanian date formats are incorrect
965 [23735] math: libnldbl_nonshared.a references internal libm symbols
966 [23740] localedata: kl_GL: Month names and date formats need update
967 [23744] regex: regex refactorings to remove BE, avoid duplication
968 [23745] time: mktime fix for Gnulib + coreutils
969 [23758] time: Improve the width of alternate representation for year in
971 [23783] libc: [mips] Missing CMSPAR bits/termios.h
972 [23789] time: mktime does not set errno on failure
973 [23791] localedata: Wrong monetary format for ca_ES locale
974 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
975 [23794] locale: c16rtomb does not handle surrogate pairs
976 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
977 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
978 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
979 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
980 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
981 [23862] libc: [sh] missing kernel-features.h undefines
982 [23864] libc: [riscv] missing kernel-features.h undefines
983 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
984 [23907] malloc: Incorrect double-free malloc tcache check disregards
986 [23913] libc: off-by-one in function maybe_script_execute in
987 sysdeps/posix/spawni.c
988 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
989 [23923] locale: Add --no-hard-links option to localedef
990 [23927] network: Linux if_nametoindex() does not close descriptor
992 [23961] math: powf can overflow to inf without setting errno in non-
993 nearest rounding mode
994 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
995 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
996 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
997 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
998 [24011] localedata: Fixed small type in comment for locale bs_BA
999 [24018] libc: gettext() may return NULL
1000 [24022] build: riscv build failure with Linux kernel 4.20-rc7
1001 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
1002 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
1004 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
1005 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
1007 [24046] localedata: en_US locale doesn't define date_fmt
1008 [24063] manual: @var{errno} should be @code{errno}
1009 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
1010 [24088] libc: VSCR field is not being correctly read in ucontext_t on
1012 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
1014 [24097] string: Can't use 64-bit register for size_t in assembly codes for
1016 [24110] hurd: SS_DISABLE never set in stack_t value returned by
1018 [24112] network: Do not send DNS queries for non-host names (where all
1019 answers will be rejected)
1020 [24130] libc: alpha __remqu corrupts $f3 register
1027 * The localization data for ISO 14651 is updated to match the 2016
1028 Edition 4 release of the standard, this matches data provided by
1029 Unicode 9.0.0. This update introduces significant improvements to the
1030 collation of Unicode characters. This release deviates slightly from
1031 the standard in that the collation element ordering for lowercase and
1032 uppercase LATIN script characters is adjusted to ensure that regular
1033 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
1034 is not matched by [a-z]. With the update many locales have been
1035 updated to take advantage of the new collation information. The new
1036 collation information has increased the size of the compiled locale
1037 archive or binary locales.
1039 * The GNU C Library can now be compiled with support for Intel CET, AKA
1040 Intel Control-flow Enforcement Technology. When the library is built
1041 with --enable-cet, the resulting glibc is protected with indirect
1042 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
1043 compatible with all existing executables and shared libraries. This
1044 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
1045 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
1046 capable of multi-byte NOPs, like x86-64 processors as well as Intel
1047 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
1048 x86_64 and x32 on non-CET processors. --enable-cet has been tested
1049 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
1052 * The GNU C Library now has correct support for ABSOLUTE symbols
1053 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
1054 relocated incorrectly or in some cases discarded. The GNU linker can
1055 make use of the newer semantics, but it must communicate it to the
1056 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
1057 field) to indicate such support is required.
1059 * Unicode 11.0.0 Support: Character encoding, character type info, and
1060 transliteration tables are all updated to Unicode 11.0.0, using
1061 generator scripts contributed by Mike FABIAN (Red Hat).
1063 * <math.h> functions that round their results to a narrower type are added
1064 from TS 18661-1:2014 and TS 18661-3:2015:
1066 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
1067 fMxaddfNx functions.
1069 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
1070 fMxsubfNx functions.
1072 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
1073 fMxmulfNx functions.
1075 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
1076 fMxdivfNx functions.
1078 * Two grammatical forms of month names are now supported for the following
1079 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
1080 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
1081 support two grammatical forms in abbreviated month names: Catalan, Greek,
1084 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
1085 include the support for two grammatical forms of month names.
1087 * Building and running on GNU/Hurd systems now works without out-of-tree
1090 * The renameat2 function has been added, a variant of the renameat function
1091 which has a flags argument. If the flags are zero, the renameat2 function
1092 acts like renameat. If the flag is not zero and there is no kernel
1093 support for renameat2, the function will fail with an errno value of
1094 EINVAL. This is different from the existing gnulib function renameatu,
1095 which performs a plain rename operation in case of a RENAME_NOREPLACE
1096 flags and a non-existing destination (and therefore has a race condition
1097 that can clobber the destination inadvertently).
1099 * The statx function has been added, a variant of the fstatat64
1100 function with an additional flags argument. If there is no direct
1101 kernel support for statx, glibc provides basic stat support based on
1102 the fstatat64 function.
1104 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
1105 library if installed. libidn2 version 2.0.5 or later is recommended. If
1106 libidn2 is not available, internationalized domain names are not encoded
1107 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
1108 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
1109 with an encoding error.) Flags which used to change the IDN encoding and
1110 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
1111 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
1112 deprecated. They no longer have any effect.
1114 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
1115 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
1116 range of ELF gABI expressions including such constructs as
1117 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
1118 have been further restricted, and where in the past a dynamic string
1119 token sequence may have been interpreted as a literal string it will
1120 now cause a load failure. These load failures were always considered
1121 unspecified behaviour from the perspective of the dynamic loader, and
1122 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
1123 results in a load failure now.
1125 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
1126 implementation includes all the standard functions provided by
1129 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
1130 thrd_detach, thrd_exit, and thrd_join for thread management.
1132 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
1133 mtx_destroy for mutual exclusion.
1135 - call_once for function call synchronization.
1137 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
1138 cnd_wait for conditional variables.
1140 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
1142 Application developers must link against libpthread to use ISO C threads.
1144 Deprecated and removed features, and other changes affecting compatibility:
1146 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
1147 installed. Software that was using either header should be updated to
1148 use standard <stdio.h> interfaces instead.
1150 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
1151 This was never required by the C standard, and the macros just expanded
1152 to call alternative names for the same functions. If you hoped getc and
1153 putc would provide performance improvements over fgetc and fputc, instead
1154 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
1155 necessary, flockfile and funlockfile.
1157 * All stdio functions now treat end-of-file as a sticky condition. If you
1158 read from a file until EOF, and then the file is enlarged by another
1159 process, you must call clearerr or another function with the same effect
1160 (e.g. fseek, rewind) before you can read the additional data. This
1161 corrects a longstanding C99 conformance bug. It is most likely to affect
1162 programs that use stdio to read interactive input from a terminal.
1165 * The macros 'major', 'minor', and 'makedev' are now only available from
1166 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
1167 headers that happen to include <sys/types.h>. These macros are rarely
1168 used, not part of POSIX nor XSI, and their names frequently collide with
1169 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
1170 further explanation.
1172 <sys/sysmacros.h> is a GNU extension. Portable programs that require
1173 these macros should first include <sys/types.h>, and then include
1174 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
1176 * The tilegx*-*-linux-gnu configurations are no longer supported.
1178 * The obsolete function ustat is no longer available to newly linked
1179 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
1180 function has been deprecated in favor of fstatfs and statfs.
1182 * The obsolete function nfsservctl is no longer available to newly linked
1183 binaries. This function was specific to systems using the Linux kernel
1184 and could not usefully be used with the GNU C Library on systems with
1185 version 3.1 or later of the Linux kernel.
1187 * The obsolete function name llseek is no longer available to newly linked
1188 binaries. This function was specific to systems using the Linux kernel
1189 and was not declared in a header. Programs should use the lseek64 name
1190 for this function instead.
1192 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
1193 getaddrinfo and getnameinfo functions have been deprecated. The behavior
1194 previously selected by them is now always enabled.
1196 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
1197 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
1198 restriction (rejecting '_' in host names, among other things) has been
1199 removed, for increased compatibility with non-IDN name resolution.
1201 * The fcntl function now have a Long File Support variant named fcntl64. It
1202 is added to fix some Linux Open File Description (OFD) locks usage on non
1203 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
1204 fcntl and LFS support is handled transparently. Also for Linux, the OFD
1205 locks act as a cancellation entrypoint.
1207 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
1208 ecb_crypt, and des_setparity are no longer available to newly linked
1209 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
1210 longer installed. These functions encrypted and decrypted data with the
1211 DES block cipher, which is no longer considered secure. Software that
1212 still uses these functions should switch to a modern cryptography library,
1215 * Reflecting the removal of the encrypt and setkey functions above, the
1216 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
1217 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1220 * The obsolete function fcrypt is no longer available to newly linked
1221 binaries. It was just another name for the standard function crypt,
1222 and it has not appeared in any header file in many years.
1224 * We have tentative plans to hand off maintenance of the passphrase-hashing
1225 library, libcrypt, to a separate development project that will, we hope,
1226 keep up better with new passphrase-hashing algorithms. We will continue
1227 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1228 'crypt_r' should not need to change at all; however, distributions will
1229 need to install <crypt.h> and libcrypt from a separate project.
1231 In this release, if the configure option --disable-crypt is used, glibc
1232 will not install <crypt.h> or libcrypt, making room for the separate
1233 project's versions of these files. The plan is to make this the default
1234 behavior in a future release.
1236 Changes to build and runtime requirements:
1238 GNU make 4.0 or later is now required to build glibc.
1240 Security related changes:
1242 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1243 been fixed by removing the glibc-internal IDNA implementation and using
1244 the system-provided libidn2 library instead. Originally reported by Hanno
1245 Böck and Christian Weisgerber.
1247 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1248 architecture could corrupt memory. Reported by Max Horn.
1250 CVE-2018-11236: Very long pathname arguments to realpath function could
1251 result in an integer overflow and buffer overflow. Reported by Alexey
1254 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1255 architecture could write beyond the target buffer, resulting in a buffer
1256 overflow. Reported by Andreas Schwab.
1258 The following bugs are resolved with this release:
1260 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1261 [6889] manual: 'PWD' mentioned but not specified
1262 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1263 when __WORDSIZE != 64
1264 [13762] regex: re_search etc. should return -2 on memory exhaustion
1265 [13888] build: /tmp usage during testing
1266 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1267 [14092] nptl: Support C11 threads
1268 [14095] localedata: Review / update collation data from Unicode / ISO
1270 [14508] libc: -Wformat warnings
1271 [14553] libc: Namespace pollution loff_t in sys/types.h
1272 [14890] libc: Make NT_PRFPREG canonical.
1273 [15105] libc: Extra PLT references with -Os
1274 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1276 [16335] manual: Feature test macro documentation incomplete and out of
1278 [16552] libc: Unify umount implementations in terms of umount2
1279 [17082] libc: htons et al.: statement-expressions prevent use on global
1280 scope with -O1 and higher
1281 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1282 [17438] localedata: pt_BR: wrong d_fmt delimiter
1283 [17662] libc: please implement binding for the new renameat2 syscall
1284 [17721] libc: __restrict defined as /* Ignore */ even in c11
1285 [17979] libc: inconsistency between uchar.h and stdint.h
1286 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1287 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1288 horrible machine code)
1289 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1291 [18471] libc: llseek should be a compat symbol
1292 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1294 [18991] nss: nss_files skips large entry in database
1295 [19239] libc: Including stdlib.h ends up with macros major and minor being
1297 [19463] libc: linknamespace failures when compiled with -Os
1298 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1299 [19527] locale: Normalized charset name not recognized by setlocale
1300 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1301 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1303 [19728] network: out of bounds stack read in libidn function
1304 idna_to_ascii_4i (CVE-2016-6261)
1305 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1306 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1307 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1309 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1310 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1311 [20419] dynamic-link: files with large allocated notes crash in
1313 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1314 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1315 [20980] manual: CFLAGS environment variable replaces vital options
1316 [21163] regex: Assertion failure in pop_fail_stack when executing a
1317 malformed regexp (CVE-2015-8985)
1318 [21234] manual: use of CFLAGS makes glibc detect no optimization
1319 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1320 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1321 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1322 [21508] locale: intl/tst-gettext failure with latest msgfmt
1323 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1324 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1325 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1327 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1329 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1330 [22247] network: Integer overflow in the decode_digit function in
1331 puny_decode.c in libidn (CVE-2017-14062)
1332 [22342] nscd: NSCD not properly caching netgroup
1333 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1334 [22550] localedata: es_ES locale (and other es_* locales): collation
1335 should treat ñ as a primary different character, sync the collation
1336 for Spanish with CLDR
1337 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1338 by gcc configured with --enable-default-pie
1339 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1340 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1341 crossing 2GB threshold (CVE-2017-18269)
1342 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1344 [22735] time: Misleading typo in time.h source comment regarding
1346 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1347 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1348 `__assert_perror_fail ()' to `__assert_fail_base ()'
1349 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1351 [22786] libc: Stack buffer overflow in realpath() if input size is close
1352 to SSIZE_MAX (CVE-2018-11236)
1353 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1354 through an absolute DT_NEEDED path
1355 [22792] build: tcb-offsets.h dependency dropped
1356 [22797] libc: pkey_get() uses non-reserved name of argument
1357 [22807] libc: PTRACE_* constants missing for powerpc
1358 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1359 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1360 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1361 [22848] localedata: ca_ES: update date definitions from CLDR
1362 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1363 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1364 [22896] localedata: Update locale data for an_ES
1365 [22902] math: float128 test failures with GCC 8
1366 [22918] libc: multiple common of `__nss_shadow_database'
1367 [22919] libc: sparc32: backtrace yields infinite backtrace with
1369 [22926] libc: FTBFS on powerpcspe
1370 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1372 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1373 [22947] libc: FAIL: misc/tst-preadvwritev2
1374 [22963] localedata: cs_CZ: Add alternative month names
1375 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1376 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1377 [22998] dynamic-link: execstack tests are disabled when SELinux is
1379 [23005] network: Crash in __res_context_send after memory allocation
1381 [23007] math: strtod cannot handle -nan
1382 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1383 [23036] regex: regex equivalence class regression
1384 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1385 [23069] libc: sigaction broken on riscv64-linux-gnu
1386 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1387 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1388 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1389 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1390 and libc build with -Os)
1391 [23140] localedata: More languages need two forms of month names
1392 [23145] libc: _init/_fini aren't marked as hidden
1393 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1394 [23171] math: C++ iseqsig for long double converts arguments to double
1395 [23178] nscd: sudo will fail when it is run in concurrent with commands
1396 that changes /etc/passwd
1397 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1399 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1400 [23208] localedata: New locale - Lower Sorbian (dsb)
1401 [23233] regex: Memory leak in build_charclass_op function in file
1403 [23236] stdio: Harden function pointers in _IO_str_fields
1404 [23250] nptl: Offset of __private_ss differs from GCC
1405 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1406 -mtune=generic -mfpmath=sse
1407 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1409 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1410 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1412 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1413 [23277] math: nan function should not have const attribute
1414 [23279] math: scanf and strtod wrong for some hex floating-point
1415 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1417 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1418 [23303] build: undefined reference to symbol
1419 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1420 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1422 [23313] stdio: libio vtables validation and standard file object
1424 [23329] libc: The __libc_freeres infrastructure is not properly run across
1426 [23349] libc: Various glibc headers no longer compatible with
1428 [23351] malloc: Remove unused code related to heap dumps and malloc
1430 [23363] stdio: stdio-common/tst-printf.c has non-free license
1431 [23396] regex: Regex equivalence regression in single-byte locales
1432 [23422] localedata: oc_FR: More updates of locale data
1433 [23442] build: New warning with GCC 8
1434 [23448] libc: Out of bounds access in IBM-1390 converter
1435 [23456] libc: Wrong index_cpu_LZCNT
1436 [23458] build: tst-get-cpu-features-static isn't added to tests
1437 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1439 [23467] dynamic-link: x86/CET: A property note parser bug
1446 * The GNU C Library can now be compiled with support for building static
1447 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1448 executables are like static executables but can be loaded at any address
1449 and provide additional security hardening benefits at the cost of some
1450 memory and performance. When the library is built with --enable-static-pie
1451 the resulting libc.a is usable with GCC 8 and above to create static PIE
1452 executables using the GCC option '-static-pie'. This feature is currently
1453 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1454 aarch64 with binutils 2.30 or later.
1456 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1457 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1460 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1462 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1464 * In order to support faster and safer process termination the malloc API
1465 family of functions will no longer print a failure address and stack
1466 backtrace after detecting heap corruption. The goal is to minimize the
1467 amount of work done after corruption is detected and to avoid potential
1468 security issues in continued process execution. Reducing shutdown time
1469 leads to lower overall process restart latency, so there is benefit both
1470 from a security and performance perspective.
1472 * The abort function terminates the process immediately, without flushing
1473 stdio streams. Previous glibc versions used to flush streams, resulting
1474 in deadlocks and further data corruption. This change also affects
1475 process aborts as the result of assertion failures.
1477 * On platforms where long double has the IEEE binary128 format (aarch64,
1478 alpha, mips64, riscv, s390 and sparc), the math library now implements
1479 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1480 These are the same interfaces added in version 2.26 for some platforms where
1481 this format is supported but is not the format of long double.
1483 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1484 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1485 implements interfaces for that type, as defined by ISO/IEC TS
1486 18661-3:2015. These are corresponding interfaces to those supported for
1489 * The math library now implements interfaces for the _Float32, _Float64 and
1490 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1491 corresponding interfaces to those supported for _Float128.
1493 * glibc now implements the memfd_create and mlock2 functions on Linux.
1495 * Support for memory protection keys was added. The <sys/mman.h> header now
1496 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1499 * The copy_file_range function was added.
1501 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1503 * The ldconfig utility now processes `include' directives using the C/POSIX
1504 collation ordering. Previous glibc versions used locale-specific
1505 ordering, the change might break systems that relied on that.
1507 * Support for two grammatical forms of month names has been added.
1508 In a call to strftime, the "%B" and "%b" format specifiers will now
1509 produce the grammatical form required when the month is used as part
1510 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1511 required when the month is named by itself. For instance, in Greek
1512 and in many Slavic and Baltic languages, "%B" will produce the month
1513 in genitive case, and "%OB" will produce the month in nominative case.
1515 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1516 are all valid and will all accept any known form of month
1517 name---standalone or complete, abbreviated or full. In a call to
1518 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1519 the strings used by "%B" and "%b", respectively. New query
1520 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1521 used by "%OB" and "%Ob", respectively.
1523 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1524 define the strings for %OB and %Ob, respectively; these have the
1525 same syntax as "mon" and "abmon". These arrays are optional; if they
1526 are not provided then they have the same content as "mon" and "abmon",
1529 These features are provided for locales which define "alt_mon" and/or
1530 "ab_alt_mon" in their locale source data. This release includes such
1531 alternative month name data for the following languages: Belarusian,
1532 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1534 This feature is currently a GNU extension, but it is expected to
1535 be added to the next revision of POSIX, and it is also already
1536 available on some BSD-derived operating systems.
1538 This feature will cause existing statically compiled applications
1539 to fail to load locales and fall back to the builtin C/POSIX locales.
1540 See notes below for other changes affecting compatibility.
1542 * Support for the RISC-V ISA running on Linux has been added. This port
1543 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1544 for the following ISA and ABI pairs:
1550 Deprecated and removed features, and other changes affecting compatibility:
1552 * Statically compiled applications attempting to load locales compiled for the
1553 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1554 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1555 support for two grammatical forms of the month names, also extends the locale
1556 data binary format. Static applications needing locale support must be
1557 recompiled to match the runtime and data they are deployed with. In some
1558 distributions there is an upgrade window where dynamically linked applications
1559 may use a new library but the old locale data and also fall back to the
1560 builtin C/POSIX locales; restarting the application process is sufficient to
1563 * Support for statically linked applications which call dlopen is deprecated
1564 and will be removed in a future version of glibc. Applications which call
1565 dlopen need to be linked dynamically instead.
1567 * Support for old programs which use internal stdio data structures and
1568 functions is deprecated. This includes programs which use the C++ streams
1569 provided by libstdc++ in GCC 2.95. Programs which use the internal
1570 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1571 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1572 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1573 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1574 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1575 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1576 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1577 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1578 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1579 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1580 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1581 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1582 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1583 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1584 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1585 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1586 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1587 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1588 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1589 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1590 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1591 future version of glibc. Unlike other symbol removals, these old
1592 applications will not be supported using compatibility symbols.
1594 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1595 defined by <sys/ptrace.h>.
1597 * libm no longer supports SVID error handling (calling a user-provided
1598 matherr function on error) or the _LIB_VERSION variable to control error
1599 handling. (SVID error handling and the _LIB_VERSION variable still work
1600 for binaries linked against older versions of the GNU C Library.) The
1601 libieee.a library is no longer provided. math.h no longer defines struct
1602 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1603 TLOSS, PLOSS and HUGE.
1605 * The libm functions pow10, pow10f and pow10l are no longer supported for
1606 new programs. Programs should use the standard names exp10, exp10f and
1607 exp10l for these functions instead.
1609 * The mcontext_t type is no longer the same as struct sigcontext. On
1610 platforms where it was previously the same, this changes the C++ name
1611 mangling for interfaces involving this type.
1613 * The add-ons mechanism for building additional packages at the same time as
1614 glibc has been removed. The --enable-add-ons configure option is now
1617 * The --without-fp configure option is now ignored. Whether hardware
1618 floating-point instructions are used is now configured based on whether
1619 the compiler used at configure time (without any options implied by a
1620 --with-cpu= configure option) uses such instructions.
1622 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1623 the specified string can be parsed as a domain name.
1625 * In the malloc_info output, the <heap> element may contain another <aspace>
1626 element, "subheaps", which contains the number of sub-heaps.
1628 * The libresolv function p_secstodate is no longer supported for new
1631 * The tilepro-*-linux-gnu configuration is no longer supported.
1633 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1634 and will be removed in a future release. Software that is still using
1635 either header should be updated to use standard <stdio.h> interfaces
1638 libio.h was originally the header for a set of supported GNU extensions,
1639 but they have not been maintained as such in many years, they are now
1640 standing in the way of improvements to stdio, and we don't think there are
1641 any remaining external users. _G_config.h was never intended for public
1642 use, but predates the bits convention.
1644 Changes to build and runtime requirements:
1646 * bison version 2.7 or later is required to generate code in the 'intl'
1649 Security related changes:
1651 CVE-2009-5064: The ldd script would sometimes run the program under
1652 examination directly, without preventing code execution through the
1653 dynamic linker. (The glibc project disputes that this is a security
1654 vulnerability; only trusted binaries must be examined using the ldd
1657 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1658 suffered from a one-byte overflow during ~ operator processing (either
1659 on the stack or the heap, depending on the length of the user name).
1660 Reported by Tim Rühsen.
1662 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1663 would sometimes fail to free memory allocated during ~ operator
1664 processing, leading to a memory leak and, potentially, to a denial
1667 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1668 without GLOB_NOESCAPE, could write past the end of a buffer while
1669 unescaping user names. Reported by Tim Rühsen.
1671 CVE-2017-17426: The malloc function, when called with an object size near
1672 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1673 instead of NULL. This was a regression introduced with the new malloc
1674 thread cache in glibc 2.26. Reported by Iain Buclaw.
1676 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1677 to the allocation of too much memory. (This is not a security bug per se,
1678 it is mentioned here only because of the CVE assignment.) Reported by
1681 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1682 of the number of search path components. (This is not a security
1683 vulnerability per se because no trust boundary is crossed if the fix for
1684 CVE-2017-1000366 has been applied, but it is mentioned here only because
1685 of the CVE assignment.) Reported by Qualys.
1687 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1688 for AT_SECURE or SUID binaries could be used to load libraries from the
1691 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1692 succeeds without returning an absolute path due to unexpected behaviour
1693 of the Linux kernel getcwd syscall. Reported by halfdog.
1695 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1696 an object size near the value of SIZE_MAX, would return a pointer to a
1697 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1699 CVE-2018-6551: The malloc function, when called with an object size near
1700 the value of SIZE_MAX, would return a pointer to a buffer which is too
1701 small, instead of NULL.
1703 The following bugs are resolved with this release:
1705 [866] glob: glob should match dangling symlinks
1706 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1707 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1709 [5997] math: Very slow execution of sinf function
1710 [10580] localedata: hr_HR: updated locale
1711 [10871] locale: 'mon' array should contain both nominative and genitive
1713 [12349] localedata: eu_ES: incorrect thousands separator
1714 [13605] localedata: shn_MM: new Shan locale
1715 [13805] localedata: ru_RU: currency should use ',' as radix point
1716 [13953] localedata: km_KH: locale update
1717 [13994] localedata: mjw_IN: new locale
1718 [14121] build: make writes .mo files in po directory
1719 [14333] libc: Fix the race between atexit() and exit()
1720 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1721 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1723 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1724 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1725 width Latin characters
1726 [15332] localedata: es_CU: locale update
1727 [15436] stdio: Don't close or flush stdio streams on abort
1728 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1730 [16148] localedata: ca_ES: incorrect thousands separator
1731 [16750] dynamic-link: ldd should not try to execute the binaries
1733 [16777] localedata: pl_PL: incorrect thousands separator in locale
1734 [16905] localedata: hanzi: new collation
1735 [17563] localedata: cmn_TW: add hanzi collation
1736 [17750] localedata: wrong collation order of diacritics in most locales
1737 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1739 [17956] build: Build fails on missing definitions from header file
1740 nss/nss.h when Mozilla NSS is used for cryptography
1741 [18203] libc: realpath() does not handle unreachable paths correctly
1742 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1743 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1744 [18822] libc: Internal functions are called via PLT
1745 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1746 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1747 [19574] libc: glibc should support building static PIE binaries
1748 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1750 [19971] glob: glob: Do not skip entries with zero d_ino values
1751 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1752 [20008] localedata: km_KH: convert to translit_neutral
1753 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1754 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1755 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1756 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1757 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1759 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1760 they're set, wrong errors returned by gaih_inet when lookup functions
1762 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1763 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1765 [20952] localedata: yuw_PG: new locale
1766 [21084] localedata: charmaps/IBM858: new codepage
1767 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1768 [21242] libc: assert gives pedantic warning in old gcc versions
1769 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1770 __regcall calling convention
1771 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1772 [21326] libc: C99 functions are not declared for C++11 and later if
1773 _GNU_SOURCE is not predefined by g++
1774 [21457] libc: sys/ucontext.h namespace
1775 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1776 [21660] math: GCC fails to compile a formula with tgmath.h
1777 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1778 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1779 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1780 [21684] math: tgmath.h handling of complex integers
1781 [21685] math: tgmath.h handling of bit-fields
1782 [21686] math: tgmath.h handling of __int128
1783 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1785 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1787 [21750] localedata: column width of characters incompatible with classical
1789 [21754] malloc: malloc: Perform as little work as possible after heap
1790 consistency check failures
1791 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1792 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1793 [21791] string: Unused XXX_chk_XXX functions in libc.a
1794 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1796 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1798 [21845] localedata: Added new Locale bho_NP
1799 [21853] localedata: Fix abday Which looks same as day in zh_SG
1800 [21854] localedata: Added New Locale en_SC
1801 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1802 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1803 _dl_runtime_resolve_avx_slow
1804 [21885] network: getaddrinfo: gethosts does not release resolver context
1805 on memory allocation failure
1806 [21899] libc: XPG4.2 sigaction namespace
1807 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1809 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1811 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1812 errno value, causing getaddrinfo to fail
1813 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1814 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1815 instead of EAI_NODATA
1816 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1817 constant PTRACE_SEIZE_DEVEL
1818 [21930] math: C-only gcc builtins used in <math.h> isinf
1819 [21932] network: Unpaired __resolv_context_get in generic get*_r
1821 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1822 [21944] libc: sigval namespace
1823 [21951] localedata: Update hanzi collation by stroke
1824 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1825 sysdeps/x86_64/fpu/e_expf.S
1826 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1827 allocation in syscall loops)
1828 [21959] localedata: Fix Country name for xh_ZA
1829 [21960] localedata: Fix abmon for bem_ZM
1830 [21966] math: AVX2 mathvec functions use FMA without checking
1831 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1832 [21971] localedata: Added New Locale for mfe_MU
1833 [21972] libc: assert macro requires operator== (int) for its argument type
1834 [21973] math: [sparc] libm missing sqrtl compat symbol
1835 [21974] libc: Remove __bb_init_func and __bb_exit_func
1836 [21982] string: stratcliff.c: error: assuming signed overflow does not
1838 [21986] stdio: __guess_grouping is called incorrectly
1839 [21987] math: [sparc32] wrong bits/long-double.h installed
1840 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1842 [22022] localedata: Missing country_name for mni_IN
1843 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1845 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1847 [22026] locale: iconv_open: heap overflow on gconv_init failure
1848 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1849 [22035] math: [m68k] bits/math-inline.h macro namespace
1850 [22038] localedata: Fix abbreviated weeks and months for Somali
1851 [22044] localedata: Remove redundant data for Limburgish Language
1852 [22050] malloc: Linking with -lmcheck does not hook
1853 __malloc_initialize_hook correctly
1854 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1855 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1856 [22070] localedata: charmaps/UTF-8: wcwidth for
1857 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1858 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1859 Jungseong and Jongseong) should be 0
1860 [22078] nss: nss_files performance issue in multi mode
1861 [22082] math: bits/math-finite.h exp10 condition
1862 [22086] libc: pcprofiledump incorrect cross-endian condition
1863 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1864 [22095] network: Name server address allocation memory leak in resolv.conf
1866 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1868 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1869 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1871 [22111] malloc: malloc: per thread cache is not returned when thread exits
1872 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1873 [22134] libc: [linux] implement fexecve with execveat
1874 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1876 [22145] libc: ttyname() gives up too early in the face of namespaces
1877 [22146] math: C++ build issue with float128 on x86_64
1878 [22153] nptl: nptl: save error code before process termination
1879 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1880 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1881 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1882 [22165] libc: [hppa] Text relocations in libc.so
1883 [22180] libc: destructor registered via __cxa_atexit is called twice
1884 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1885 symlinks") cause "make" segfaults
1886 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1888 [22207] libc: FAIL: stdlib/test-atexit-race
1889 [22225] math: nearbyint arithmetic moved before feholdexcept
1890 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1891 [22235] math: iscanonical in C++ and float128
1892 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1893 the svid compat wrapper
1894 [22244] math: ynf and yn are wrong without the svid compat wrapper
1895 [22273] libc: Improper assert in Linux posix_spawn implementation
1896 [22284] libc: -pg -pie doesn't work
1897 [22292] locale: localedef exits with error 4 when it should be error 1
1898 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1899 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1901 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1902 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1904 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1905 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1906 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1907 [22322] libc: [mips64] wrong bits/long-double.h installed
1908 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1909 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1911 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1912 [22343] malloc: Integer overflow in posix_memalign
1913 [22347] libc: getrandom() returns the number of bytes that were copied to
1914 the buffer even though the comments say "Return 0 on success and -1 on
1916 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1917 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1919 [22370] dynamic-link: Incorrect note padding check
1920 [22375] libc: malloc returns pointer from tcache_get when should return
1921 NULL (CVE-2017-17426)
1922 [22377] math: iseqsig, float128 and C++
1923 [22382] localedata: Error in tpi_PG locale
1924 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1925 inside the ASCII printable range
1926 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1928 [22403] localedata: Slash needs escaping in some locales
1929 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1930 [22409] network: res_hnok does not accept some host names used on the
1932 [22412] network: res_dnok, res_hnok should perform syntax checks
1933 [22413] network: ns_name_pton ignores syntactically invalid trailing
1935 [22415] stdio: setvbuf can lead to invalid free/segfault
1936 [22432] build: Non-deterministic build
1937 [22439] malloc: malloc_info should compute summary statistics for all sub-
1939 [22442] network: if_nametoindex could report index for the wrong
1940 networking interface
1941 [22446] build: aliasing violation calling readlink in handle_request
1942 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1943 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1944 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1945 __nscd_hash/__nss_hash
1946 [22463] network: p_secstodate overflow handling
1947 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1948 [22478] libc: sigwait can fail with EINTR
1949 [22505] libc: ldconfig processes include directive in locale-specific
1951 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1952 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1953 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1954 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1955 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1956 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1957 same as for Croatian
1958 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1959 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1960 [22577] libc: missing newline after "cannot allocate TLS data structures
1962 [22588] manual: manual/conf.texi: missing underscore in front of
1964 [22593] math: nextafter and nexttoward are declared with const attribute
1965 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1966 [22603] string: ia64 memchr overflows internal pointer check
1967 [22605] libc: SH clone does not set the exit code correctly
1968 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1970 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1971 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1972 modified in case of success
1973 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
1974 [22615] manual: manual: ambiguous wording about errno value in case of
1976 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1978 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1979 binaries or if /proc is not mounted (CVE-2017-16997)
1980 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1981 [22630] build: $(no-pie-ldflag) is no longer effective
1982 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1983 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1984 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1985 [22637] nptl: guard size is subtracted from thread stack size instead of
1987 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1988 [22657] localedata: hu_HU: Avoid double space in date
1989 [22660] math: fmax, fmin sNaN handling on alpha
1990 [22664] libc: New warning of GCC8
1991 [22665] math: alpha: ceil and floor raise inexact exceptions
1992 [22666] math: alpha: trunc raise inexact exceptions
1993 [22667] libc: makecontext lacks stack alignment on i386
1994 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1995 [22679] libc: getcwd(3) can succeed without returning an absolute path
1997 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1998 elision and tunables
1999 [22687] math: [powerpc-nofpu] complex long double functions spurious
2001 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
2002 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
2003 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
2005 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
2006 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
2008 [22701] nis: Incomplete removal of libnsl
2009 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
2010 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
2011 [22715] dynamic-link: FAIL: elf/tst-audit10
2012 [22719] libc: Backtrace tests fail on hppa
2013 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
2014 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
2015 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
2016 before the first call to crypt_r () in crypt/badsalttest.c
2023 * A per-thread cache has been added to malloc. Access to the cache requires
2024 no locks and therefore significantly accelerates the fast path to allocate
2025 and free small amounts of memory. Refilling an empty cache requires locking
2026 the underlying arena. Performance measurements show significant gains in a
2027 wide variety of user workloads. Workloads were captured using a special
2028 instrumented malloc and analyzed with a malloc simulator. Contributed by
2029 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
2031 * Unicode 10.0.0 Support: Character encoding, character type info, and
2032 transliteration tables are all updated to Unicode 10.0.0, using
2033 generator scripts contributed by Mike FABIAN (Red Hat).
2034 These updates cause user visible changes, especially the changes in
2035 wcwidth for many emoji characters cause problems when emoji sequences
2036 are rendered with pango, see for example:
2037 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
2039 * Collation of Hungarian has been overhauled and is now consistent with "The
2040 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
2043 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
2045 - The GNU C Library will now detect when /etc/resolv.conf has been
2046 modified and reload the changed configuration. The new resolver option
2047 “no-reload” (RES_NORELOAD) disables this behavior.
2049 - The GNU C Library now supports an arbitrary number of search domains
2050 (configured using the “search” directive in /etc/resolv.conf);
2051 previously, there was a hard limit of six domains. For backward
2052 compatibility, applications that directly modify the ‘_res’ global
2053 object are still limited to six search domains.
2055 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
2056 Library will now randomly pick a name server from the configuration as a
2057 starting point. (Previously, the second name server was always used.)
2059 * The tunables feature is now enabled by default. This allows users to tweak
2060 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
2062 * New function reallocarray, which resizes an allocated block (like realloc)
2063 to the product of two sizes, with a guaranteed clean failure upon integer
2064 overflow in the multiplication. Originally from OpenBSD, contributed by
2065 Dennis Wölfing and Rüdiger Sonderfeld.
2067 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
2068 These are extended versions of preadv and pwritev, respectively, taking an
2069 additional flags argument. The set of supported flags depends on the
2070 running kernel; full support currently requires kernel 4.7 or later.
2072 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
2073 create a new session ID for the spawned process. This feature is
2074 scheduled to be added to the next major revision of POSIX; for the time
2075 being, it is available under _GNU_SOURCE.
2077 * errno.h is now safe to use from C-preprocessed assembly language on all
2078 supported operating systems. In this context, it will only define the
2079 Exxxx constants, as preprocessor macros expanding to integer literals.
2081 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
2082 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
2083 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
2084 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
2086 To compile programs that use this feature, the compiler must support
2087 128-bit floating point with the type name _Float128 (as defined by TS
2088 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
2089 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
2090 must be defined to make the new interfaces visible.
2092 The new functions and macros correspond to those present for other
2093 floating-point types (except for a few obsolescent interfaces not
2094 supported for the new type), with F128 or f128 suffixes; for example,
2095 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
2096 printf or scanf formats for the new type; the strfromf128 and strtof128
2097 interfaces should be used instead.
2099 Deprecated and removed features, and other changes affecting compatibility:
2101 * The synchronization that pthread_spin_unlock performs has been changed to
2102 now be equivalent to a C11 atomic store with release memory order to the
2103 spin lock's memory location. Previously, several (but not all)
2104 architectures used stronger synchronization (e.g., containing what is
2105 often called a full barrier). This change can improve performance, but
2106 may affect odd fringe uses of spin locks that depend on the previous
2107 behavior (e.g., using spin locks as atomic variables to try to implement
2108 Dekker's mutual exclusion algorithm).
2110 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
2113 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
2114 will only be built and installed when the GNU C Library is configured with
2115 --enable-obsolete-rpc. This allows alternative RPC implementations, such
2116 as TIRPC or rpcsvc-proto, to be used.
2118 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
2119 libnss_compat, are deprecated, and will not be built or installed by
2122 The NIS(+) support library, libnsl, is also deprecated. By default, a
2123 compatibility shared library will be built and installed, but not headers
2124 or development libraries. Only a few NIS-related programs require this
2125 library. (In particular, the GNU C Library has never required programs
2126 that use 'gethostbyname' to be linked with libnsl.)
2128 Replacement implementations based on TIRPC, which additionally support
2129 IPv6, are available from <https://github.com/thkukuk/>. The configure
2130 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
2131 name service modules, to be built and installed.
2133 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
2134 support is enabled, the configured recursive resolver must support EDNS.
2135 (Responding to EDNS-enabled queries with responses which are not
2136 EDNS-enabled is fine, but FORMERR responses are not.)
2138 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
2139 servers have not supported this opcode for a long time.
2141 * The _res_opcodes variable has been removed from libresolv. It had been
2142 exported by accident.
2144 * <string.h> no longer includes inline versions of any string functions,
2145 as this kind of optimization is better done by the compiler. The macros
2146 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
2148 * The nonstandard header <xlocale.h> has been removed. Most programs should
2149 use <locale.h> instead. If you have a specific need for the definition of
2150 locale_t with no other declarations, please contact
2151 libc-alpha@sourceware.org and explain.
2153 * The obsolete header <sys/ultrasound.h> has been removed.
2155 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
2157 * The obsolete function cfree has been removed. Applications should use
2160 * The stack_t type no longer has the name struct sigaltstack. This changes
2161 the C++ name mangling for interfaces involving this type.
2163 * The ucontext_t type no longer has the name struct ucontext. This changes
2164 the C++ name mangling for interfaces involving this type.
2166 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
2167 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
2168 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
2169 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
2170 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
2171 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
2172 fpregset_t type no longer has the name struct fpu. This changes the C++
2173 name mangling for interfaces involving those types.
2175 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
2176 synced with the kernel:
2178 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
2179 are not supported on this architecture and have been removed.
2181 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
2182 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
2183 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
2185 Programs that assume the GET/SETREGS ptrace requests are universally
2186 available will now fail to build, instead of malfunctioning at runtime.
2188 Changes to build and runtime requirements:
2190 * Linux kernel 3.2 or later is required at runtime, on all architectures
2191 supported by that kernel. (This is a change from version 2.25 only for
2194 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
2196 * On most architectures, GCC 4.9 or later is required to build the GNU C
2197 Library. On powerpc64le, GCC 6.2 or later is required.
2199 Older GCC versions and non-GNU compilers are still supported when
2200 compiling programs that use the GNU C Library. (We do not know exactly
2201 how old, and some GNU extensions to C may be _de facto_ required. If you
2202 are interested in helping us make this statement less vague, please
2203 contact libc-alpha@sourceware.org.)
2205 Security related changes:
2207 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
2208 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
2210 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
2211 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
2213 * Avoid printing a backtrace from the __stack_chk_fail function since it is
2214 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
2217 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
2218 fixed (CVE-2017-12133).
2220 The following bugs are resolved with this release:
2222 [984] network: Respond to changed resolv.conf in gethostbyname
2223 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2224 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2226 [12189] libc: __stack_chk_fail should not attempt a backtrace
2228 [14096] time: Race condition on timezone/tst-timezone.out
2229 [14172] localedata: az_IR: new locale
2230 [14995] build: glibc fails to build if gold is the default linker, even if
2232 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2233 [16637] network: inet_pton function is accepting IPv6 with bad format
2234 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2235 x86 and other generic code
2236 [16875] localedata: ko_KR: fix lang_name
2237 [17225] localedata: ar_SY: localized month names for May and June are
2239 [17297] localedata: da_DK: wrong date_fmt string
2240 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2241 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2242 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2243 [19066] localedata: ar_SA abbreviated day and month names are in English
2244 [19569] network: resolv: Support an arbitrary number of search domains
2245 [19570] network: Implement random DNS server selection in the stub
2247 [19838] locale: localedef fails on PA-RISC
2248 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2249 order of 0D36 and 0D37
2250 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2252 [20098] libc: FAIL: debug/backtrace-tst on hppa
2253 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2255 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2257 [20313] localedata: Update locale data to Unicode 9.0
2258 [20424] manual: Document how to provide a malloc replacement
2259 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2261 [20686] locale: Add el_GR@euro to SUPPORTED.
2262 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2263 failures consistently
2264 [21015] dynamic-link: Document and fix --enable-bind-now
2265 [21016] nptl: pthread_cond support is broken on hppa
2266 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2267 frame-pointer on i386
2268 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2270 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2271 [21088] libc: Build fails with --enable-static-nss
2272 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2273 generic c code is used
2274 [21109] libc: Tunables broken on big-endian
2275 [21112] math: powf has large ulp errors with base close to 1 and exponent
2277 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2279 [21120] malloc: glibc malloc is incompatible with GCC 7
2280 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2282 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2283 (-0.0) when linking with -lieee
2284 [21171] math: log10, log2 and lgamma return incorrect results
2285 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2286 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2287 [21207] localedata: ce_RU: update weekdays from CLDR
2288 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2289 [21217] localedata: Update months from CLDR-31
2290 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2291 [21243] libc: support_delete_temp_file should issue warning for failed
2293 [21244] libc: support resolv_test_start() socket fd close should be
2295 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2296 new posix_spawn implementation
2297 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2298 leads to lower CPU frequency
2299 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2300 [21261] libc: [sparc64] bits/setjmp.h namespace
2301 [21267] network: [mips] bits/socket.h IOC* namespace
2302 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2303 [21270] libc: mmap64 silently truncates large offset values
2304 [21275] libc: posix_spawn always crashes on ia64 now
2305 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2306 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2307 [21289] libc: Incorrect declaration for 32-bit platforms with
2308 _FILE_OFFSET_BITS=64 causes build error
2309 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2310 not support gethostbyname4_r
2311 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2313 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2315 [21340] libc: Support POSIX_SPAWN_SETSID
2316 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2317 [21359] network: ns_name_pack needs additional byte in destination buffer
2318 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2319 against fragmentation attacks (CVE-2017-12132)
2320 [21369] network: resolv: Remove EDNS fallback
2321 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2323 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2324 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2325 [21393] stdio: Missing dup3 error check in freopen, freopen64
2326 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2327 [21399] localedata: Bad description for U00EC in
2328 localedata/charmaps/CP1254
2329 [21411] malloc: realloc documentation error
2330 [21426] network: sys/socket.h uio.h namespace
2331 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2332 [21445] libc: signal.h bsd_signal namespace
2333 [21455] network: Network headers stdint.h namespace
2334 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2336 [21475] network: resolv: Overlong search path is truncated mid-label
2337 [21511] libc: sigstack namespace
2338 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2339 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2340 bits/syscall.h: No such file or directory
2341 [21517] libc: struct sigaltstack namespace
2342 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2343 [21533] localedata: Update locale data to Unicode 10.0
2345 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2346 junk at end of line, first unrecognized character is `@'
2347 [21538] libc: SIG_HOLD missing for XPG4
2348 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2349 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2350 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2351 [21543] libc: sigevent namespace
2352 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2353 size for general purpose registers in mcontext_t structure
2354 [21550] libc: sigwait namespace
2355 [21552] libc: XPG4 bsd_signal namespace
2356 [21554] libc: sigpause namespace
2357 [21560] libc: sys/wait.h signal.h namespace
2358 [21561] libc: waitid namespace
2359 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2360 '/usr/include/stdlib.h': Permission denied
2361 [21575] libc: sys/wait.h missing struct rusage definition
2362 [21584] libc: sigaltstack etc namespace
2363 [21597] libc: siginterrupt namespace
2364 [21607] math: hppa: FAIL: math/test-tgmath
2365 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2367 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2368 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2369 stack and heap (CVE-2017-1000366)
2370 [21625] libc: wait3 namespace
2371 [21654] nss: Incorrect pointer alignment in NSS group merge result
2373 [21657] network: Parse interface zone id for node-local multicast
2374 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2376 [21666] libc: .symver is used on common symbol
2377 [21668] network: resolv: res_init cross-thread broadcast introduces race
2379 [21687] math: tgmath.h totalorder, totalordermag return type
2380 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2382 [21696] libc: Incorrect assumption of of __cpu_mask in
2383 posix/sched_cpucount.c
2384 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2385 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2387 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2388 leading to relocation crash
2389 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2390 `resolv_conf_matches (resp, conf)' failed.
2391 [21710] localedata: Added Samoan language locale for Samoa
2392 [21711] localedata: Pashto yesstr/nostr locale are missing
2393 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2394 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
2395 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2396 [21723] localedata: yesstr/nostr missing for Chinese language locale
2397 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2399 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2401 [21728] localedata: New Locale for Tongan language
2402 [21729] localedata: incorrect LC_NAME fields for hi_IN
2403 [21733] localedata: yesstr and nostr are missing for zh_HK
2404 [21734] localedata: Missing yesstr and nostr are for kw_GB
2405 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2406 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2407 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2408 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2410 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2412 [21749] localedata: Wrong abbreviated day name (“abday”) for
2414 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2415 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2416 [21759] localedata: missing yesstr and nostr for Tigrinya
2417 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2418 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2419 [21767] localedata: Missing Bislama locales
2420 [21768] localedata: Missing yesstr and nostr for aa_ET
2421 [21770] localedata: Missing Field in li_NL
2422 [21778] nptl: Robust mutex may deadlock
2423 [21779] libc: MicroBlaze segfaults when loading libpthread
2424 [21783] localedata: Fix int_select international_call_prefixes
2425 [21784] localedata: Inconsistency in country_isbn
2426 [21788] localedata: Missing Country Postal Abbreviations
2427 [21794] localedata: Added-country_isbn-for-Italy
2428 [21795] localedata: Add/Fix country_isbn for France
2429 [21796] localedata: Added country_isbn for Republic of Korea
2430 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2431 [21799] localedata: Added int_select international_call_prefixes
2432 [21801] localedata: Added int_select international_call_prefixes
2433 [21804] nptl: Double semicolon in thread-shared-types.h
2434 [21807] localedata: LC_ADDRESS fix for pap_CW
2435 [21808] localedata: Fix LC_ADDRESS for pap_AW
2436 [21821] localedata: Added country_name in mai_IN
2437 [21822] localedata: Fix LC_TIME for mai_IN
2438 [21823] localedata: missing yesstr, nostr for sa_IN
2439 [21825] localedata: Fix name_mrs for mag_IN
2440 [21828] localedata: 2.26 changelog should mention user visible changes
2442 [21835] localedata: Added Maithili language locale for Nepal
2443 [21838] localedata: Removed redundant data for the_NP
2444 [21839] localedata: Fix LC_MONETARY for ta_LK
2445 [21844] localedata: Fix Latin characters and Months Sequence.
2446 [21848] localedata: Fix mai_NP Title Name
2451 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2452 24731-2:2010, is supported to enable declarations of functions from that
2453 TR. Note that not all functions from that TR are supported by the GNU C
2456 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2457 18661-1:2014, is supported to enable declarations of functions and macros
2458 from that TS. Note that not all features from that TS are supported by
2461 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2462 18661-4:2015, is supported to enable declarations of functions and macros
2463 from that TS. Note that most features from that TS are not supported by
2466 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2467 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2468 Since the GNU C Library defaults to a much newer revision of POSIX, this
2469 will only affect programs that specifically request an old conformance
2470 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2471 see a change in the visible declarations, but a program compiled with
2472 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2475 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2476 defined by all multithreaded code, but glibc has not required this for
2479 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2480 means that in a future release, the macros “major”, “minor”, and “makedev”
2481 will only be available from <sys/sysmacros.h>.
2483 These macros are not part of POSIX nor XSI, and their names frequently
2484 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2485 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2486 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2489 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2490 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2491 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2493 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2494 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2495 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2496 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2497 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2498 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2499 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2500 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2501 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2502 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2503 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2506 * New <math.h> features are added from TS 18661-1:2014:
2508 - Signaling NaN macros: SNANF, SNAN, SNANL.
2510 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2511 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2512 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2514 - llogb functions: the llogb, llogbf and llogbl functions, and the
2515 FP_LLOGB0 and FP_LLOGBNAN macros.
2517 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2520 - Comparison macros: iseqsig.
2522 - Classification macros: iscanonical, issubnormal, iszero.
2524 - Total order functions: totalorder, totalorderf, totalorderl,
2525 totalordermag, totalordermagf, totalordermagl.
2527 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2529 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2530 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2532 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2533 are added to libc. They convert a floating-point number into string.
2535 * Most of glibc can now be built with the stack smashing protector enabled.
2536 It is recommended to build glibc with --enable-stack-protector=strong.
2537 Implemented by Nick Alcock (Oracle).
2539 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2540 intended to be used instead of memset() to erase sensitive data after use;
2541 the compiler will not optimize out calls to explicit_bzero even if they
2542 are "unnecessary" (in the sense that no _correct_ program can observe the
2543 effects of the memory clear).
2545 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2546 to float instead of double. This does not affect the ABI of any libraries
2547 that are part of the GNU C Library, but may affect the ABI of other
2548 libraries that use this type in their interfaces.
2550 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2551 float_t and double_t types are now defined to long double instead of float
2552 and double. These options are not the default, and this does not affect
2553 the ABI of any libraries that are part of the GNU C Library, but it may
2554 affect the ABI of other libraries that use this type in their interfaces,
2555 if they are compiled or used with those options.
2557 * The getentropy and getrandom functions, and the <sys/random.h> header file
2560 * The buffer size for byte-oriented stdio streams is now limited to 8192
2561 bytes by default. Previously, on Linux, the default buffer size on most
2562 file systems was 4096 bytes (and thus remains unchanged), except on
2563 network file systems, where the buffer size was unpredictable and could be
2564 as large as several megabytes.
2566 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2567 for the Linux quota interface which predates kernel version 2.4.22 has
2570 * The malloc_get_state and malloc_set_state functions have been removed.
2571 Already-existing binaries that dynamically link to these functions will
2572 get a hidden implementation in which malloc_get_state is a stub. As far
2573 as we know, these functions are used only by GNU Emacs and this change
2574 will not adversely affect already-built Emacs executables. Any undumped
2575 Emacs executables, which normally exist only during an Emacs build, should
2576 be rebuilt by re-running “./configure; make” in the Emacs build tree.
2578 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
2579 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2580 “no-ip6-dotint” had already been the default, and support for the
2581 “ip6-dotint” option was removed from the Internet in 2006.
2583 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2584 flag from <resolv.h> have been removed. The option relied on a
2585 backwards-incompatible DNS extension which was never deployed on the
2588 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2589 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2590 They were already unimplemented.
2592 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2593 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2594 removed again from the IETF name lookup interface specification in RFC
2595 2553. Applications should use getaddrinfo instead.
2597 * DNSSEC-related declarations and definitions have been removed from the
2598 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2599 decode the data part of DNSSEC record types. Previous versions of glibc
2600 only implemented minimal support for the previous version of DNSSEC, which
2601 is incompatible with the currently deployed version.
2603 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2604 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2605 <arpa/nameser.h> header file because the distinction between RR types and
2606 meta-RR types is not officially standardized, subject to revision, and
2607 thus not suitable for encoding in a macro.
2609 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2610 and rhook members of the res_state type in <resolv.h> have been removed.
2611 The glibc stub resolver did not support these hooks, but the header file
2612 did not reflect that.
2614 * For multi-arch support it is recommended to use a GCC which has
2615 been built with support for GNU indirect functions. This ensures
2616 that correct debugging information is generated for functions
2617 selected by IFUNC resolvers. This support can either be enabled by
2618 configuring GCC with '--enable-gnu-indirect-function', or by
2619 enabling it by default by setting 'default_gnu_indirect_function'
2620 variable for a particular architecture in the GCC source file
2623 * GDB pretty printers have been added for mutex and condition variable
2624 structures in POSIX Threads. When installed and loaded in gdb these pretty
2625 printers show various pthread variables in human-readable form when read
2626 using the 'print' or 'display' commands in gdb.
2628 * Tunables feature added to allow tweaking of the runtime for an application
2629 program. This feature can be enabled with the '--enable-tunables' configure
2630 flag. The GNU C Library manual has details on usage and README.tunables has
2631 instructions on adding new tunables to the library.
2633 * A new version of condition variables functions have been implemented in
2634 the NPTL implementation of POSIX Threads to provide stronger ordering
2637 * A new version of pthread_rwlock functions have been implemented to use a more
2638 scalable algorithm primarily through not using a critical section anymore to
2641 Security related changes:
2643 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2644 have been created with makecontext could fail to terminate due to a
2645 missing .cantunwind annotation. This has been observed to lead to a hang
2646 (denial of service) in some Go applications compiled with gccgo. Reported
2647 by Andreas Schwab. (CVE-2016-6323)
2649 * The DNS stub resolver functions would crash due to a NULL pointer
2650 dereference when processing a query with a valid DNS question type which
2651 was used internally in the implementation. The stub resolver now uses a
2652 question type which is outside the range of valid question type values.
2655 The following bugs are resolved with this release:
2657 [4099] stdio: Overly agressive caching by stream i/o functions.
2658 [7065] build: Support building glibc with -fstack-protector or -fstack-
2660 [9842] localedata: en_CA: incorrect date format
2661 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2662 before it started waiting
2663 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2664 [15765] nptl: sem_open is wrongly a cancellation point
2665 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2666 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2668 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2669 library linked with pthread
2670 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2671 "FIXME: Ingo" issue)
2672 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2673 [17252] libc: getrandom and getentropy syscall
2674 [17730] malloc: thread-local storage is sometimes improperly free()'d
2675 after being __libc_memalign()'d
2676 [18241] stdio: failed fseek on memstream does not set errno and can fail
2678 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2680 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2681 PTHREAD_PRIO_INHERIT mutex on ARM
2682 [18784] network: res_query and related function crash for special record
2683 type queries (CVE-2015-5180)
2684 [19380] math: strtod does not raise "inexact"
2685 [19387] string: Integer overflow in memchr
2686 [19390] string: Integer overflow in strncat
2687 [19398] build: linknamespace tests fail with massively parallel build
2688 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2690 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2691 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2692 [19514] libc: [PATCH] Fix spelling errors in spelling
2693 "implement"/"implementation" in several places
2694 [19582] network: Deprecate RES_USE_INET6
2695 [19673] manual: clog10 docs appear to be erroneous
2696 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2697 causes a segmentation fault
2698 [19826] libc: invalid pointer returned from __tls_get_addr with static
2700 [20016] network: resolv: Remove hooks support from the API
2701 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2703 [20033] math: [x86_64] vectorized math function don't call the __finite
2705 [20116] nptl: use after free in pthread_create
2706 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2707 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2709 [20311] nptl: please install proc_service.h
2710 [20366] libc: Compilation errors in installed headers in strict-compliance
2712 [20370] malloc: malloc: Arena free list management is still racy
2713 (incorrect fix in bug 19243)
2714 [20386] libc: assert (X = 0) does not result in GCC warning
2715 [20432] malloc: malloc: Minimize interface required for interposition
2716 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2717 in _Unwind_Backtrace (CVE-2016-6323)
2718 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2719 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2721 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2722 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2723 [20477] network: resolv: incorrect double-checked locking related to
2725 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2727 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2729 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2730 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2731 cause transition penalty
2732 [20517] math: sparcv9 missing fdiml compat symbol
2733 [20524] manual: strverscmp is inconsistent
2734 [20525] libc: <sys/quota.h> should be based on kernel headers
2735 [20539] math: GCC 7 -static -lm fails to link at -O3
2736 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2738 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2740 [20591] network: Remove obsolete DNSSEC support
2741 [20592] network: DNS resource record type classification macros in
2742 <arpa/nameser.h> are incorrect
2743 [20593] network: Update DNS RR type definitions
2744 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2745 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2747 [20629] network: libresolv: Remove support for bitstring labels
2749 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2750 assertion: "maxidx >= 2"
2751 [20660] math: [arm] Use VSQRT
2752 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2753 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2754 [20689] libc: Test for FMA should also check for AVX.
2755 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2756 [20715] math: iszero macro breaks existing code
2757 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2758 [20728] libc: powerpc: Missing TOC stub in clone
2759 [20729] build: glibc-2.24 fails to build for i486 with -Os
2760 [20750] build: Build fails with default PIE enabled gcc-6.x
2761 [20768] math: [alpha] sqrt fegetenv namespace
2762 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2764 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2765 __FLT_EVAL_METHOD__ is 2
2766 [20790] network: rpcgen buffer overrun in get_prog_declaration
2767 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2768 [20829] libc: crypt snprintf namespace
2769 [20847] libc: tst-vfork3 failure
2770 [20855] math: Default bits/mathdef.h has inappropriate float_t
2771 [20859] math: [sh4] FP_ILOGB0 invalid
2772 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2773 U+20AC), not same as GBK
2774 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2775 [20916] math: pow handling of sNaN arguments
2776 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2777 [20919] math: Bad pow (qNaN, 0) result with -lieee
2778 [20940] math: hypot sNaN handling
2779 [20947] math: fmax, fmin sNaN handling
2780 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2781 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2783 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2784 [20973] nptl: robust mutexes: Lost wake-ups
2785 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2786 [20978] nis: strlen on null pointer in nss_nisplus
2787 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2789 [21014] string: i686 memchr overflows internal pointer check
2790 [21019] libc: [mips] n32 lseek incorrect on overflow
2791 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2792 [21026] libc: [MIPS] readahead syscall is broken on n64
2793 [21028] math: Fallback fesetexceptflag should always succeed
2794 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2795 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2797 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2798 [21061] librt: [microblaze] librt lost clock_* exports
2799 [21073] libc: tunables: insecure environment variables passed to
2800 subprocesses with AT_SECURE
2801 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2805 * The minimum Linux kernel version that this version of the GNU C Library
2806 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2807 kernel version 2.6.32 or later suffices (on architectures that already
2808 required kernel versions more recent than 3.2, those requirements remain
2809 unchanged). Linux 3.2 or later kernel headers are required on all
2812 * The pap_AN locale has been deleted. This has been deprecated for a long
2813 time. It has been replaced by pap_AW & pap_CW, both of which have long
2814 been included in previous releases.
2816 * The readdir_r and readdir64_r functions have been deprecated. It is
2817 recommended to use readdir and readdir64 instead.
2819 * The type “union wait” has been removed. It was deprecated in the early
2820 1990s and never part of POSIX. Application code should use the int type
2821 instead of “union wait”.
2823 * A new NSS action is added to facilitate large distributed system
2824 administration. The action, MERGE, allows remote user stores like LDAP
2825 to be merged into local user stores like /etc/groups in order to provide
2826 easy to use, updated, and managed sets of merged credentials. The new
2827 action can be used by configuring it in /etc/nsswitch.conf:
2828 group: files [SUCCESS=merge] nis
2829 Implemented by Stephen Gallagher (Red Hat).
2831 * The deprecated __malloc_initialize_hook variable has been removed from the
2834 * The long unused localedef --old-style option has been removed. It hasn't
2835 done anything in over 16 years. Scripts using this option can safely
2838 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2839 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2840 return the next representable value in the direction of positive infinity
2841 and the nextdown functions return the next representable value in the
2842 direction of negative infinity. These are currently enabled as GNU
2845 Security related changes:
2847 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2848 could result in a stack overflow when getnetbyname was called with an
2849 overly long name. (CVE-2016-3075)
2851 * Previously, getaddrinfo copied large amounts of address data to the stack,
2852 even after the fix for CVE-2013-4458 has been applied, potentially
2853 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2854 instead. Reported by Michael Petlan. (CVE-2016-3706)
2856 * The glob function suffered from a stack-based buffer overflow when it was
2857 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2858 Reported by Alexander Cherepanov. (CVE-2016-1234)
2860 * The Sun RPC UDP client could exhaust all available stack space when
2861 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2862 alloca plugin for GCC. (CVE-2016-4429)
2864 * The IPv6 name server management code in libresolv could result in a memory
2865 leak for each thread which is created, performs a failing naming lookup,
2866 and exits. Over time, this could result in a denial of service due to
2867 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2869 The following bugs are resolved with this release:
2871 [1170] localedata: ne_NP: update Nepali locale definition file
2872 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2874 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2875 [6796] math: fdim() does not set errno on overflow
2876 [10354] libc: posix_spawn should use vfork() in more cases than presently
2877 [11213] localedata: localedata: add copyright disclaimer to locale files
2878 [12143] localedata: chr_US: new Cherokee locale
2879 [12450] localedata: sgs_LT: new locale
2880 [12676] localedata: ln_CD: new locale
2881 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2883 [13304] math: fma, fmaf, fmal produce wrong results
2884 [14259] build: --localedir arg to configure is ignored
2885 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2886 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2887 [14934] localedata: es_CL: wrong first weekday chilean locale
2888 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2890 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2892 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2893 [15368] nptl: raise() is not async-signal-safe
2894 [15479] math: ceil, floor, round and trunc raise inexact exception
2895 [15578] localedata: kk_KZ: various updates
2896 [16003] localedata: pap_AN: punt old locale
2897 [16137] localedata: iw_IL: punt old locale
2898 [16190] localedata: eo: new esperanto locale
2899 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2900 [16742] malloc: race condition: pthread_atfork() called before first
2901 malloc() results in unexpected locking behaviour/deadlocks
2902 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2904 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2905 [17565] localedata: pt_PT: wrong (work-)week start
2906 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2907 [17950] build: Build fails with -msse
2908 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2909 [18433] libc: posix_spawn does not return correctly upon failure to
2911 [18453] localedata: charmaps/IBM875: incorrect codes
2912 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2914 [18896] localedata: he_IL: improvements for currency
2915 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2916 Romanian locale data
2917 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2919 [19056] libc: Deprecate readdir_r
2920 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2922 [19198] localedata: nl_NL: small improvements for Dutch locales
2923 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2924 nameservers (CVE-2016-5417)
2925 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2927 [19400] locale: Language missing in "iso-639.def", trivial fix in
2929 [19431] malloc: Deadlock between fflush, getdelim, and fork
2930 [19505] libc: Incorrect file descriptor validity checks in
2931 posix_spawn_file_actions_add{open,close,dup2}
2932 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2933 when using RTLD_NEXT
2934 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2935 `intl/{gettextP,loadinfo}.h'
2936 [19534] libc: execle, execlp may use malloc
2937 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2938 [19573] network: res_nclose and __res_maybe_init disagree about name
2939 server initialization, breaking Hesiod
2940 [19575] localedata: Status of GB18030 tables
2941 [19581] localedata: sr_* date_fmt string contains additional newline
2942 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2944 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2945 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2946 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2947 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2949 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2951 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2953 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2954 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2955 [19633] locale: strfmon_l applies global locale to number formatting
2956 [19642] network: Memory leak in getnameinfo
2957 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2958 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2960 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2961 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2963 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2964 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2966 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2968 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2970 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2971 pointers and lengths in error-case.
2972 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2973 report errors on UTF-16 surrogates values.
2974 [19755] nscd: nscd assertion failure in gc
2975 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2976 [19759] libc: mempcpy shouldn't be inlined
2977 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2978 [19765] libc: s390 needs an optimized mempcpy
2979 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2980 NAME_MAX limit assumption (CVE-2016-1234)
2981 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2982 [19787] network: Missing and incorrect truncation checks in getnameinfo
2983 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2985 [19791] network: Assertion failure in res_query.c with un-connectable name
2987 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2988 [19822] math: libm.so install clobbers old version
2989 [19825] network: resolv: send_vc can return uninitialized data in second
2990 response to getaddrinfo
2991 [19830] network: nss_dns: should check RDATA length against buffer length
2992 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2993 confronted with A/AAAA records of invalid size
2994 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2995 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2996 [19853] stdio: Printing IBM long double in decimal with high precision is
2998 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2999 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
3000 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
3002 [19865] network: Assertion failure or memory leak in
3003 _nss_dns_getcanonname_r
3004 [19868] network: nss_dns: netent code does not skip over non-PTR records
3005 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
3007 [19881] string: Improve x86-64 memset
3008 [19907] string: Incorrect memcpy tests
3009 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
3011 [19925] libc: termios.h XCASE namespace
3012 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
3013 [19929] libc: limits.h NL_NMAX namespace
3014 [19931] stdio: Memory leak in vfprintf
3015 [19957] libc: clone(CLONE_VM) access invalid parent memory
3016 [19963] localedata: en_IL: New locale
3017 [19989] stdio: stdio.h cuserid namespace
3018 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
3020 [19996] locale: langinfo.h nl_langinfo_l namespace
3021 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
3022 [20010] network: getaddrinfo: Stack overflow in hostent translation
3024 [20012] stdio: libio: fmemopen append mode failure
3025 [20014] stdio: stdio.h namespace for pre-threads POSIX
3026 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
3027 [20023] libc: fcntl.h timespec namespace
3028 [20024] math: [x86_64] vectorized sincos trashes the stack
3029 [20031] network: nss_hesiod: Heap overflow in get_txt_records
3030 [20041] time: sys/time.h timespec namespace
3031 [20043] libc: unistd.h missing cuserid for UNIX98 and before
3032 [20044] libc: unistd.h missing pthread_atfork for UNIX98
3033 [20051] libc: ttyslot in wrong header under wrong conditions
3034 [20054] libc: gethostname not declared for XPG4
3035 [20055] libc: termios.h missing tcgetsid for XPG4
3036 [20072] dynamic-link: x86 init_cpu_features is called twice in static
3038 [20073] libc: sys/stat.h fchmod namespace
3039 [20074] libc: stdlib.h rand_r namespace
3040 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
3041 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
3043 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
3044 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
3046 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
3047 [20119] libc: Wrong mask for processors level type from CPUID
3048 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
3049 AS not supporting AVX512
3050 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
3052 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
3053 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
3055 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
3056 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
3057 [20178] libc: posix_spawn{p} should not call exit
3058 [20191] stdio: libio: vtables hardening
3059 [20195] string: FMA4 detection requires CPUID execution with register
3061 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
3062 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
3064 [20212] math: acos (sNaN) returns sNaN
3065 [20213] math: asin (sNaN) returns sNaN
3066 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
3067 [20218] math: [i386] asinhl (sNaN) returns sNaN
3068 [20219] math: [i386] atanhl (sNaN) returns sNaN
3069 [20222] stdio: fopencookie: Mangle function pointers
3070 [20224] math: [i386] cbrtl (sNaN) returns sNaN
3071 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
3072 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
3074 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
3075 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
3076 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
3077 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
3078 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
3079 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
3080 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
3081 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
3082 [20240] math: modf (sNaN) returns sNaN
3083 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
3084 [20250] math: frexp (sNaN) returns sNaN
3085 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
3086 [20255] math: [i386] fdim, fdimf return with excess range and precision /
3088 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
3089 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
3090 subscript is below array bounds [-Werror=array-bounds]
3091 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
3092 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
3094 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
3095 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
3097 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
3098 "invalid" exceptions
3099 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
3100 [20316] localedata: id_ID: Februari instead of Pebruari
3101 [20327] string: POWER8 strcasecmp returns incorrect result
3102 [20347] math: Failure: Test: j0_downward (0xap+0)
3103 [20348] libc: FAIL: misc/tst-preadvwritev64
3104 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
3105 [20350] libc: There is no test for p{read,write}64
3106 [20357] math: Incorrect cos result for 1.5174239687223976
3107 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
3111 * Unicode 8.0.0 Support: Character encoding, character type info, and
3112 transliteration tables are all updated to Unicode 8.0.0, using new
3113 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
3114 These updates cause user visible changes, such as the fixes for bugs
3115 89, 16061, and 18568.
3117 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
3118 kernel-internal CPU set size. This means that requests that change the
3119 CPU affinity which failed before (for example, an all-ones CPU mask) will
3120 now succeed. Applications that need to determine the effective CPU
3121 affinities need to call sched_getaffinity or pthread_getaffinity_np after
3122 setting it because the kernel can adjust it (and the previous size check
3123 would not detect this in the majority of cases).
3125 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
3126 the following new symbols are used: fts64_children, fts64_close,
3127 fts64_open, fts64_read and fts64_set.
3129 * getaddrinfo now detects certain invalid responses on an internal netlink
3130 socket. If such responses are received, an affected process will
3131 terminate with an error message of "Unexpected error <number> on netlink
3132 descriptor <number>" or "Unexpected netlink response of size <number> on
3133 descriptor <number>". The most likely cause for these errors is a
3134 multi-threaded application which erroneously closes and reuses the netlink
3135 file descriptor while it is used by getaddrinfo.
3137 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
3138 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
3139 unnecessary serialization of memory allocation requests across threads.
3140 The defect is now corrected. Users should see a substantial increase in
3141 the concurent throughput of allocation requests for applications which
3142 trigger this bug. Affected applications typically create and
3143 destroy threads frequently. (Bug 19048 was reported and analyzed by
3146 * There is now a --disable-timezone-tools configure option for disabling the
3147 building and installing of the timezone related utilities (zic, zdump, and
3148 tzselect). This is useful for people who build the timezone data and code
3149 independent of the GNU C Library.
3151 * The obsolete header <regexp.h> has been removed. Programs that require
3152 this header must be updated to use <regex.h> instead.
3154 * The obsolete functions bdflush, create_module, get_kernel_syms,
3155 query_module and uselib are no longer available to newly linked binaries;
3156 the header <sys/kdaemon.h> has been removed. These functions and header
3157 were specific to systems using the Linux kernel and could not usefully be
3158 used with the GNU C Library on systems with version 2.6 or later of the
3161 * Optimized string, wcsmbs and memory functions for IBM z13.
3162 Implemented by Stefan Liebler.
3164 * Newly linked programs that define a variable called signgam will no longer
3165 have it set by the lgamma, lgammaf and lgammal functions. Programs that
3166 require signgam to be set by those functions must ensure that they use the
3167 variable provided by the GNU C Library and declared in <math.h>, without
3168 defining their own copy.
3170 * The minimum GCC version that can be used to build this version of the GNU
3171 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
3172 still be used to compile programs using the GNU C Library.
3174 Security related changes:
3176 * An out-of-bounds value in a broken-out struct tm argument to strftime no
3177 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
3179 * The LD_POINTER_GUARD environment variable can no longer be used to disable
3180 the pointer guard feature. It is always enabled. Previously,
3181 LD_POINTER_GUARD could be used to disable security hardening in binaries
3182 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
3185 * An integer overflow in hcreate and hcreate_r could lead to an
3186 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
3188 * The catopen function no longer has unbounded stack usage. Reported by
3189 Max. (CVE-2015-8779)
3191 * The nan, nanf and nanl functions no longer have unbounded stack usage
3192 depending on the length of the string passed as an argument to the
3193 functions. Reported by Joseph Myers. (CVE-2014-9761)
3195 * A stack-based buffer overflow was found in libresolv when invoked from
3196 libnss_dns, allowing specially crafted DNS responses to seize control
3197 of execution flow in the DNS client. The buffer overflow occurs in
3198 the functions send_dg (send datagram) and send_vc (send TCP) for the
3199 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
3200 family. The use of AF_UNSPEC triggers the low-level resolver code to
3201 send out two parallel queries for A and AAAA. A mismanagement of the
3202 buffers used for those queries could result in the response of a query
3203 writing beyond the alloca allocated buffer created by
3204 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
3205 the overflow. Thanks to the Google Security Team and Red Hat for
3206 reporting the security impact of this issue, and Robert Holiday of
3207 Ciena for reporting the related bug 18665. (CVE-2015-7547)
3209 The following bugs are resolved with this release:
3211 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
3212 [887] math: Math library function "logb" and "nextafter" inconsistent
3213 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
3214 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
3215 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
3216 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
3218 [4404] localedata: German translation of "Alarm clock" is misleading
3219 [6799] math: nextafter() and nexttoward() doen't set errno on
3220 overflow/underflow errors
3221 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3223 [10432] nis: _nss_nis_setnetgrent assertion failure
3224 [11460] libc: fts has no LFS support
3225 [12926] network: getaddrinfo()/make_request() may spin forever
3226 [13065] nptl: Race condition in pthread barriers
3227 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3228 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3230 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3231 [14912] libc: Rename non-installed bits/*.h headers
3232 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3233 [15367] math: Let gcc use __builtin_isinf
3234 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3235 [15421] math: lgamma wrongly sets signgam for ISO C
3236 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3237 FE_INVALID with argument out of range
3238 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3240 [15786] dynamic-link: ifunc resolver functions can smash function
3242 [15918] math: Unnecessary check for equality in hypotf()
3243 [16061] localedata: Review / update transliteration data
3244 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3246 [16141] time: strptime %z offset restriction
3247 [16171] math: drem should be alias of remainder
3248 [16296] math: fegetround is pure?
3249 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3250 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3252 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3253 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3255 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3256 "Exception "Inexact" set" on ppc32
3257 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3258 [16517] math: Missing underflow exception from tanf/tan/tanl
3259 [16519] math: Missing underflow exception from sinhf
3260 [16520] math: Missing underflow exception from tanhf
3261 [16521] math: Missing underflow exception from exp2
3262 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3264 [16734] stdio: fopen calls mmap to allocate its buffer
3265 [16961] math: nan function incorrect handling of bad sequences
3266 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3267 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3268 [16985] locale: localedef: confusing error message when opening output
3270 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3271 [17197] locale: Redundant shift character in iconv conversion output at
3273 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3274 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3275 [17250] dynamic-link: static linking breaks nss loading
3276 (getaddrinfo/getpwnam/etc...)
3277 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3279 [17441] math: isnan() should use __builtin_isnan() in GCC
3280 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3281 (related to lock elision)
3282 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3283 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3284 [17887] time: strptime should be able to parse "+01:00" style timezones
3285 [17905] libc: catopen() Multiple unbounded stack allocations
3287 [18084] libc: backtrace (..., 0) dumps core on x86
3288 [18086] libc: nice() sets errno to 0 on success
3289 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3290 is too large (CVE-2015-8778)
3291 [18251] dynamic-link: SONAME missing when audit modules provides path
3292 [18265] libc: add attributes for wchar string and memory functions
3293 [18370] math: csqrt missing underflows
3294 [18421] libc: [hppa] read-only segment has dynamic relocations
3295 [18472] libc: Obsolete syscall wrappers should be compat symbols
3296 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3297 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3298 [18525] localedata: Remove locale timezone information
3299 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3300 [18568] localedata: Update locale data to Unicode 8.0
3301 [18589] locale: sort-test.sh fails at random
3302 [18595] math: ctan, ctanh missing underflows
3303 [18604] libc: assert macro-expands its argument
3304 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3305 contains a vector instruction exception.
3306 [18611] math: j1, jn missing errno setting on underflow
3307 [18618] localedata: sync Chechen locale definitions with other *_RU
3309 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3310 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3311 [18665] network: In send_dg, the recvfrom function is NOT always using the
3312 buffer size of a newly created buffer (CVE-2015-7547)
3313 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3315 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3317 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3318 [18699] math: tilegx cproj() for various complex infinities does not yield
3320 [18724] libc: Harden put*ent functions against data injection
3321 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3322 [18755] build: build errors with -DNDEBUG
3323 [18757] stdio: fmemopen fails to set errno on failure
3324 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3326 [18781] libc: openat64 lacks O_LARGEFILE
3327 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3328 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3329 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3330 [18790] math: [ldbl-128ibm] tanhl inaccurate
3331 [18795] libc: stpncpy fortification misses buffer lengths that are
3332 statically too large
3333 [18796] build: build fails for --disable-mathvec
3334 [18803] math: hypot missing underflows
3335 [18820] stdio: fmemopen may leak memory on failure
3336 [18823] math: csqrt spurious underflows
3337 [18824] math: fma spurious underflows
3338 [18825] math: pow missing underflows
3339 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3340 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3341 [18870] build: sem_open.c fails to compile with missing symbol
3343 [18872] stdio: Fix memory leak in printf_positional
3344 [18873] libc: posix_fallocate overflow check ineffective
3345 [18875] math: Excess precision leads incorrect libm
3346 [18877] libc: arm: mmap offset regression
3347 [18887] libc: memory corruption when using getmntent on blank lines
3348 [18918] localedata: hu_HU: change time to HH:MM:SS format
3349 [18921] libc: Regression: extraneous stat() and fstat() performed by
3351 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3352 binaries (CVE-2015-8777)
3353 [18951] math: tgamma missing underflows
3354 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3356 [18953] localedata: lt_LT: change currency symbol to the euro
3357 [18956] math: powf inaccuracy
3358 [18961] math: [i386] exp missing underflows
3359 [18966] math: [i386] exp10 missing underflows
3360 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3361 [18969] build: multiple string test failures due to missing locale
3363 [18970] libc: Reference of pthread_setcancelstate in libc.a
3364 [18977] math: float / long double Bessel functions not in XSI POSIX
3365 [18980] math: i386 libm functions return with excess range and precision
3366 [18981] math: i386 scalb*, ldexp return with excess range and precision
3367 [18982] stdio: va_list and vprintf
3368 [18985] time: Passing out of range data to strftime() causes a segfault
3370 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3371 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3372 [19012] locale: iconv_open leaks memory on error path
3373 [19016] math: clog, clog10 inaccuracy
3374 [19018] nptl: Mangle function pointers in tls_dtor_list
3375 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3376 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3377 [19048] malloc: malloc: arena free list can become cyclic, increasing
3379 [19049] math: [powerpc] erfc incorrect zero sign
3380 [19050] math: [powerpc] log* incorrect zero sign
3381 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3382 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3383 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3384 [19074] network: Data race in _res_hconf_reorder_addrs
3385 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3386 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3387 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3389 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3391 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3392 [19086] manual: posix_fallocate64 documented argument order is wrong.
3393 [19088] math: lround, llround missing exceptions close to overflow
3395 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3396 [19095] math: dbl-64 lrint incorrect for 64-bit long
3397 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3398 [19124] dynamic-link: ld.so failed to build with older assmebler
3399 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3400 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3401 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3402 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3403 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3404 pthread_setaffinity_np
3405 [19156] math: [ldbl-128] j0l spurious underflows
3406 [19164] nptl: tst-getcpu fails with many possible CPUs
3407 [19168] math: math/test-ildoubl and math/test-ldouble failure
3408 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3409 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3411 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3412 (FE_NOMASK_ENV) do not clear SSE exceptions
3413 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3414 _int_new_arena/reused_arena
3415 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3416 [19201] math: dbl-64 remainder incorrect sign of zero result
3417 [19205] math: bits/math-finite.h conditions do not match math.h and
3419 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3420 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3421 for C99-based standards
3422 [19212] libc: features.h not -Wundef clean
3423 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3425 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3426 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3427 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3429 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3430 "inexact" exceptions
3431 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3433 [19242] libc: strtol incorrect in Turkish locales
3434 [19243] malloc: reused_arena can pick an arena on the free list, leading
3435 to an assertion failure and reference count corruption
3436 [19253] time: tzset() ineffective when temporary TZ did not include DST
3438 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3439 [19270] math: [hppa] Shared libm missing __isnanl
3440 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3441 MAP_HUGETLB and MAP_STACK defines
3442 [19313] nptl: Wrong __cpu_mask for x32
3443 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3444 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3445 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3446 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3447 [19363] time: x32: times() return value wrongly truncates/sign extends
3449 [19367] dynamic-link: Improve branch prediction on Silvermont
3450 [19369] network: Default domain name not reset by res_ninit when "search"
3451 / "domain" entry is removed from resolv.conf
3452 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3454 [19385] localedata: bg_BG: time separator should be colon, not comma
3455 [19408] libc: linux personality syscall wrapper may erroneously return an
3456 error on 32-bit architectures
3457 [19415] libc: dladdr returns wrong names on hppa
3458 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3459 IBM905, IBM907, and IBM909
3460 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3461 [19443] build: build failures with -DDEBUG
3462 [19451] build: Make check fails on test-double-vlen2
3463 [19462] libc: Glibc failed to build with -Os
3464 [19465] math: Wrong code with -Os
3465 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3467 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3469 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3470 [19486] math: S390: Math tests fail with "Exception Inexact set".
3471 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3472 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3474 [19590] math: Fail to build shared objects that use libmvec.so functions.
3478 * The following bugs are resolved with this release:
3480 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3481 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3482 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3483 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3484 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3485 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3486 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3487 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3488 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3489 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3490 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3491 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3492 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3493 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3494 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3495 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3496 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3497 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3498 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3499 18657, 18676, 18694, 18696, 18887.
3501 * Cache information can be queried via sysconf() function on s390 e.g. with
3502 _SC_LEVEL1_ICACHE_SIZE as argument.
3504 * A buffer overflow in gethostbyname_r and related functions performing DNS
3505 requests has been fixed. If the NSS functions were called with a
3506 misaligned buffer, the buffer length change due to pointer alignment was
3507 not taken into account. This could result in application crashes or,
3508 potentially arbitrary code execution, using crafted, but syntactically
3509 valid DNS responses. (CVE-2015-1781)
3511 * The time zone file parser has been made more robust against crafted time
3512 zone files, avoiding heap buffer overflows related to the processing of
3513 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3514 large time zone data files. Overly long time zone specifiers in the TZ
3515 variable no longer result in stack overflows and crashes.
3517 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3518 for LD and GD on x86 and x86-64, has been implemented. You will need
3519 binutils-2.24 or later to enable this optimization.
3521 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3522 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3523 Hat). These updates cause user visible changes, such as the fix for bug
3526 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3527 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3528 condition in some applications.
3530 * Added vector math library named libmvec with the following vectorized x86_64
3531 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3533 The library can be disabled with --disable-mathvec. Use of the functions is
3534 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3535 Shared library libmvec.so is linked in as needed when using -lm (no need to
3536 specify -lmvec explicitly for not static builds).
3537 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3539 * A new fmemopen implementation has been added with the goal of POSIX
3540 compliance. The new implementation fixes the following long-standing
3541 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3542 old implementation is still present for use be by existing binaries.
3544 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3545 releases. It has been fixed to match 2.19 and older, but binaries built
3546 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3548 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3549 Contributed by Roland McGrath (Google).
3551 * The header <regexp.h> is deprecated, and will be removed in a future
3552 release. Use of this header will trigger a deprecation warning.
3553 Application developers should update their code to use <regex.h> instead.
3555 This header was formerly part of SUS, but was deprecated in 1994 and
3556 removed from the standard in 2001. Also, the glibc implementation
3557 leaks memory. See BZ#18681 for more details.
3561 * The following bugs are resolved with this release:
3563 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3564 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3565 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3566 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3567 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3568 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3569 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3570 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3571 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3572 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3575 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3576 too little memory for the to-be-scanned arguments and overflow the
3577 allocated buffer. The implementation now correctly computes the required
3578 buffer size when using malloc, and switches to malloc from alloca as
3581 * A new semaphore algorithm has been implemented in generic C code for all
3582 machines. Previous custom assembly implementations of semaphore were
3583 difficult to reason about or ensure that they were safe. The new version
3584 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3585 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3586 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3588 * Port to Altera Nios II has been contributed by Mentor Graphics.
3590 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3591 implementations for powerpc64/powerpc64le.
3592 Implemented by Adhemerval Zanella (IBM).
3594 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3595 and powerpc64le. This may improve lock scaling of existing programs on
3596 HTM capable systems. The lock elision code is only enabled with
3597 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3598 powerpc will issue a transaction abort on every syscall to avoid side
3599 effects being visible outside transactions.
3601 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3602 AArch64. Contributed by ARM Ltd.
3604 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3606 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3607 under certain input conditions resulting in the execution of a shell for
3608 command substitution when the application did not request it. The
3609 implementation now checks WRDE_NOCMD immediately before executing the
3610 shell and returns the error WRDE_CMDSUB as expected.
3612 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3613 processing format strings with a large number of format specifiers.
3615 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3616 infinite loop if the DNS response contained a PTR record of an unexpected
3619 * The minimum GCC version that can be used to build this version of the GNU
3620 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3621 still be used to compile programs using the GNU C Library.
3623 * The GNU C Library is now built with -Werror by default. This can be
3624 disabled by configuring with --disable-werror.
3626 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3628 * The obsolete sigvec function has been removed. This was the original
3629 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3630 programs have been using instead for about 25 years. Of course, ABI
3631 compatibility for old binaries using sigvec remains intact.
3633 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3634 with newer versions of bison.
3636 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3637 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3638 registers overlay two consecutive single-precision registers. MIPS32R2
3639 introduced a new FPU mode (FR=1) where double-precision registers extend the
3640 corresponding single-precision registers which is incompatible with the
3641 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3642 require the use of FR=1 making a transition necessary. New o32 ABI
3643 extensions enable users to migrate over time from the original o32 ABI
3644 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3645 tracks the ABI of any loaded object and verifies that new objects are
3646 compatible. Mode transitions will also be requested as required and
3647 unsupportable objects will be rejected. The ABI checks include both soft and
3648 hard float ABIs for o32, n32 and n64.
3650 GCC 5 with GNU binutils 2.25 onwards:
3651 It is strongly recommended that all o32 system libraries are built using the
3652 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3653 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3654 compiler using --with-fp-32=xx to set this by default.
3658 * The following bugs are resolved with this release:
3660 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3661 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3662 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3663 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3664 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3665 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3666 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3667 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3668 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3669 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3670 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3671 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3672 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3673 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3674 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3676 * Reverted change of ABI data structures for s390 and s390x:
3677 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3678 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3679 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3680 are preserved pointing straight to the same implementation as the old ones.
3681 Given that, new callers will simply provide a too-big buffer to these
3682 functions. Any applications/libraries out there that embed jmp_buf or
3683 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3684 against 2.19 headers will have to rebuilt again. This is necessary in any
3685 case to revert the breakage in their ABI caused by the glibc change.
3687 * Support for file description locks is added to systems running the
3688 Linux kernel. The standard file locking interfaces are extended to
3689 operate on file descriptions, not file descriptors, via the use of
3690 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3691 are associated with an open file instead of a process.
3693 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3695 * The minimum Linux kernel version that this version of the GNU C Library
3696 can be used with is 2.6.32.
3698 * Running the testsuite no longer terminates as soon as a test fails.
3699 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3700 with PASS or FAIL lines for individual tests. A summary of the results is
3701 printed, including a list of failing lists, and "make check" exits with
3702 error status if there were any unexpected failures. "make check
3703 stop-on-test-failure=y" may be used to keep the old behavior.
3705 * The am33 port, which had not worked for several years, has been removed
3708 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3709 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3710 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3711 conflicted with POSIX (support for which was removed in 2.19), the
3712 interfaces those macros enabled remain available when compiling with
3713 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3714 test macros defined.
3716 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3718 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3719 This may improve lock scaling of existing programs on TX capable systems.
3720 The lock elision code is only built with --enable-lock-elision=yes and
3721 then requires a GCC version supporting the TX builtins. With lock elision
3722 default mutexes are elided via __builtin_tbegin, if the cpu supports
3723 transactions. By default lock elision is not enabled and the elision code
3726 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3727 copy the path argument. This allowed programs to cause posix_spawn to
3728 deference a dangling pointer, or use an unexpected pathname argument if
3729 the string was modified after the posix_spawn_file_actions_addopen
3732 * All supported architectures now use the main glibc sysdeps directory
3733 instead of some being in a separate "ports" directory (which was
3734 distributed separately before glibc 2.17).
3736 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3737 On configurations that support it (all Linux configurations), it's now
3738 used regardless of the --enable-add-ons switch to configure. It is no
3739 longer possible to build such configurations without pthreads support.
3741 * Locale names, including those obtained from environment variables (LANG
3742 and the LC_* variables), are more tightly checked for proper syntax.
3743 setlocale will now fail (with EINVAL) for locale names that are overly
3744 long, contain slashes without starting with a slash, or contain ".." path
3745 components. (CVE-2014-0475) Previously, some valid locale names were
3746 silently replaced with the "C" locale when running in AT_SECURE mode
3747 (e.g., in a SUID program). This is no longer necessary because of the
3750 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3751 with application code using Intel MPX instructions. (With all previous
3752 versions, the MPX register state could be clobbered when making calls
3753 into or out of a shared library.) Note that while the new dynamic
3754 linker is compatible with all known x86 hardware whether or not it
3755 supports Intel MPX, some x86 instruction-set emulators might fail to
3756 handle the new instruction encodings. This is known to affect Valgrind
3757 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3758 release), and might affect other tools that do instruction emulation.
3760 * Support for loadable gconv transliteration modules has been removed.
3761 The support for transliteration modules has been non-functional for
3762 over a decade, and the removal is prompted by security defects. The
3763 normal gconv conversion modules are still supported. Transliteration
3764 with //TRANSLIT is still possible, and the //IGNORE specifier
3765 continues to be supported. (CVE-2014-5119)
3767 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3768 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3769 resulting a denial-of-service security vulnerability in applications which
3770 use functions related to iconv. (CVE-2014-6040)
3774 * The following bugs are resolved with this release:
3776 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3777 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3778 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3779 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3780 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3781 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3782 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3783 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3784 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3785 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3786 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3787 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3788 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3789 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3790 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3791 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3792 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3793 16431, 16453, 16474, 16506, 16510, 16529
3795 * Slovenian translations for glibc messages have been contributed by the
3796 Translation Project's Slovenian team of translators.
3798 * The public headers no longer use __unused nor __block. This change is to
3799 support compiling programs that are derived from BSD sources and use
3800 __unused internally, and to support compiling with Clang's -fblock
3801 extension which uses __block.
3803 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3804 large collation sequences to optimize multiple passes. This cache
3805 computation may overflow for large collation sequences and may cause a
3806 stack or buffer overflow. This is now fixed to use a slower algorithm
3807 which does not use a cache if there is an integer overflow.
3809 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3810 rules for large collation sequences to optimize multiple passes and falls
3811 back to alloca if malloc fails, resulting in a possible stack overflow.
3812 The implementation now falls back to an uncached collation sequence lookup
3815 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3816 initialized for static applications resulting in the security feature
3817 being disabled. The pointer guard is now correctly initialized to a
3818 random value for static applications. Existing static applications need
3819 to be recompiled to take advantage of the fix (bug 15754).
3821 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3822 to the d_name member of struct dirent, or omit the terminating NUL
3823 character. (Bugzilla #14699).
3825 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3826 aligned_alloc functions could allocate too few bytes or corrupt the
3827 heap when passed very large allocation size values (Bugzilla #15855,
3830 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3831 for AF_INET6 has been fixed (Bugzilla #16072).
3833 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3834 pap_CW, quz_PE, the_NP.
3836 * Substantially revised locales: gd_GB, ht_HT
3838 * The LC_ADDRESS field was updated to support country_car for almost all
3841 * ISO 1427 definitions were updated.
3843 * ISO 3166 definitions were updated.
3845 * The localedef utility now supports --big-endian and --little-endian
3846 command-line options to generate locales for a different system from that
3847 for which the C library was built.
3849 * Binary locale files now only depend on the endianness of the system for
3850 which they are generated and not on other properties of that system. As a
3851 consequence, binary files generated with new localedef may be incompatible
3852 with old versions of the GNU C Library, and binary files generated with
3853 old localedef may be incompatible with this version of the GNU C Library,
3854 in the following circumstances:
3856 + Locale files may be incompatible on m68k systems.
3858 + Locale archive files (but not separate files for individual locales) may
3859 be incompatible on systems where plain "char" is signed.
3861 * The configure option --disable-versioning has been removed. Builds with
3862 --disable-versioning had not worked for several years.
3864 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3865 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3867 * SystemTap probes for malloc have been introduced.
3869 * SystemTap probes for slow multiple precision fallback paths of
3870 transcendental functions have been introduced.
3872 * Support for powerpc64le has been added.
3874 * The soft-float powerpc port now supports e500 processors.
3876 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3878 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3879 set of header declarations that are enabled by default, even when other
3880 feature test macros or compiler options such as -std=c99 would otherwise
3881 disable some of those declarations.
3883 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3884 conflict with POSIX. The libbsd-compat library (which was a dummy library
3885 that did nothing) has also been removed.
3887 * Preliminary documentation about Multi-Thread, Async-Signal and
3888 Async-Cancel Safety has been added.
3890 * Change of ABI data structures for s390 and s390x:
3891 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3892 allow for future hardware extensions. All library functions that accept or
3893 return these structures were versioned in order to provide backwards
3894 compatibility with existing code. However, not all cases can be handled
3895 with interface versioning. If an application embeds either structure into
3896 another structure and that structure is passed to another compilation unit
3897 which expects the newer larger-sized object then any access to the new
3898 fields will result in undefined behaviour. Similarly any access to fields
3899 that were moved by the enlarging of the structures will cause undefined
3900 behaviour. To fix the undefined behaviour all objects that are part of the
3901 final in-memory image must agree on the size of structures, and this may
3902 require recompilation.
3906 * The following bugs are resolved with this release:
3908 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3909 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3910 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3911 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3912 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3913 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3914 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3915 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3916 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3917 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3918 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3919 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3920 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3923 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3924 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3925 Distributions can re-enable building and using pt_chown via the new configure
3926 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3927 considerable security risks and should only be used if the distribution
3928 understands and accepts the risks.
3930 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3933 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3934 fixed (Bugzilla #15330).
3936 * Add support for calling C++11 thread_local object destructors on thread
3937 and program exit. This needs compiler support for offloading C++11
3938 destructor calls to glibc.
3940 * Improved worst case performance of libm functions with double inputs and
3943 * Support for priority inherited mutexes in pthread condition variables on
3944 non-x86 architectures.
3946 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3948 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3950 * Optimized string functions for ARM. Implemented by Will Newton and
3953 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3955 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3958 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3959 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3961 * Added a benchmark framework to track performance of functions in glibc.
3963 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3964 It is based on draft TS 18661 and currently enabled as a GNU extension.
3966 * On Linux, the clock function now uses the clock_gettime system call
3967 for improved precision, rather than old times system call.
3969 * Added support for version-3 tz format files. This is needed when using
3970 the tz database release 2013e or later, and affects a few unusual cases --
3971 currently only TZ='America/Godthab' for time stamps after 2037.
3973 * Added new API functions pthread_getattr_default_np and
3974 pthread_setattr_default_np to get and set the default pthread
3975 attributes of a process.
3977 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3978 This may improve lock scaling of existing programs on TSX capable systems.
3979 When the --enable-lock-elision=yes parameter is specified at configure
3980 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3983 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3984 availability). Implemented by Ryan S. Arnold.
3986 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3990 * The following bugs are resolved with this release:
3992 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3993 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3994 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3995 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3996 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3997 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3998 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3999 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
4000 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
4001 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
4002 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
4003 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
4004 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
4005 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
4006 14879, 14889, 14893, 14898, 14914.
4008 * Optimization of memcpy for MIPS.
4010 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
4011 EMFILE has been fixed (Bugzilla #14889).
4013 * The add-on ports collection is now distributed in the "ports" subdirectory
4014 of the main GNU C Library distribution, rather than separately.
4016 * Port to ARM AArch64 contributed by Linaro.
4018 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
4019 Optimized versions of memcpy, memset, and memcmp added for System z10 and
4021 Implemented by Andreas Krebbel.
4023 * The new function secure_getenv allows secure access to the environment,
4024 returning NULL if running in a SUID/SGID process. This function replaces
4025 the internal function __secure_getenv.
4027 * SystemTap static probes have been added into the dynamic linker.
4028 Implemented by Gary Benson.
4030 * Optimizations of string functions strstr, strcasestr and memmem.
4031 Implemented by Maxim Kuvyrkov.
4033 * The minimum Linux kernel version that this version of the GNU C Library
4034 can be used with is 2.6.16.
4036 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
4037 powerpc POWER7. Implemented by Will Schmidt.
4039 * New configure option --disable-nscd builds the C library such that it
4040 never attempts to contact the Name Service Caching Daemon (nscd).
4041 New configure option --disable-build-nscd avoids building nscd itself;
4042 this is the default if --disable-nscd is used.
4044 * Improved support for cross-compilation, including cross-testing and
4045 bootstrap builds without a previously built glibc.
4047 * Several testsuite tests are now able to test multiple IFUNC variants of an
4048 interface, rather than just testing the one that would be chooen by
4051 * New configure options --with-bugurl and --with-pkgversion, for
4052 distributors to use to embed their bug-reporting and package version
4053 information in --help and --version output.
4055 * The ttyname and ttyname_r functions on Linux now fall back to searching for
4056 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
4057 allows creation of chroots without the procfs mounted on /proc.
4059 * The `crypt' function now fails if passed salt bytes that violate the
4060 specification for those values. On Linux, the `crypt' function will
4061 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
4062 enabled, and fail on encrypted strings using the MD5 or DES algorithm
4063 when the mode is enabled.
4065 * The `clock_*' suite of functions (declared in <time.h>) is now available
4066 directly in the main C library. Previously it was necessary to link with
4067 -lrt to use these functions. This change has the effect that a
4068 single-threaded program that uses a function such as `clock_gettime' (and
4069 is not linked with -lrt) will no longer implicitly load the pthreads
4070 library at runtime and so will not suffer the overheads associated with
4071 multi-thread support in other code such as the C++ runtime library.
4073 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
4078 * The following bugs are resolved with this release:
4080 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
4081 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
4082 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
4083 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
4084 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
4085 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
4086 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
4087 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
4088 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
4089 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
4090 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
4091 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
4092 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
4093 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
4094 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
4095 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
4096 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
4097 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
4098 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
4099 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
4100 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
4101 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
4104 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
4105 configuring glibc with:
4106 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
4107 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
4108 Implemented by H.J. Lu.
4112 + define static_assert
4114 + do not declare gets
4116 + declare at_quick_exit and quick_exit also for ISO C11
4118 + aligned_alloc. NB: The code is deliberately allows the size parameter
4119 to not be a multiple of the alignment. This is a moronic requirement
4120 in the standard but it is only a requirement on the caller, not the
4123 + timespec_get added
4125 + uchar.h support added
4127 + CMPLX, CMPLXF, CMPLXL added
4129 Implemented by Ulrich Drepper.
4131 * Support for the IA-64 has been moved to ports.
4133 * Remove support for anything but ELF binary format
4135 * Checking versions of poll, ppoll added.
4136 Implemented by Ulrich Drepper.
4138 * More generic and 64-bit performance optimizations to math functions.
4139 Implemented by Ulrich Drepper.
4141 * New configure option --enable-obsolete-rpc makes the deprecated RPC
4142 headers and functions available at compile time as they were before
4143 version 2.14. This option will be removed at some time in the future
4144 after the TI-RPC library becomes fully sufficient for the needs of
4145 existing applications.
4147 * Compatibility code for Linux kernel versions before 2.4 has been removed.
4148 Note that glibc is not expected to work with any Linux kernel version
4151 * New header <sys/auxv.h> and function getauxval allowing easy access to
4152 the AT_* key-value pairs passed from the Linux kernel. The header also
4153 defines the HWCAP_* bits associated with the AT_HWCAP key.
4155 * New locales: mag_IN
4157 * New configure option --enable-systemtap builds SystemTap static probes
4158 into libc for setjmp and longjmp and into libpthread for various operations.
4159 So far the setjmp/longjmp probes and some of the libpthread probes are
4160 provided only for i*86 and x86_64.
4161 Implemented by Roland McGrath and Rayson Ho.
4163 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
4165 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
4168 * More optimized functions for SPARC. Implemented by David S. Miller.
4170 * Improved support for cross-compilation, especially bootstrap builds
4171 without a previously built glibc.
4173 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
4174 Chris Metcalf from Tilera.
4176 * Support for the old ARM ABI has been removed from ports. Only the EABI is
4177 now supported for ARM processors.
4179 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
4180 as the name of the dynamic linker, to distinguish it from the
4181 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
4183 * Support for CRIS has been removed from ports.
4185 * A new class of installed header has been documented for low-level
4186 platform-specific functionality. PowerPC added the first instance with a
4187 function to provide time base register access. Contributed by Tulio
4188 Magno Quites Machado Filho.
4190 * ix86 configurations now install header files that are consistent with
4191 what x86-64 configurations install. These same header files can be used
4192 for -m32, -m64, or -mx32 builds.
4193 Contributed by H.J. Lu.
4195 * Math library bug fixes. A thorough audit of all open math library bugs was
4196 conducted by Joseph Myers. Significant progress was made on many math
4197 library bugs resulting in more accurate exceptions and function results.
4198 Many thanks to all those that contributed including Andreas Jaeger for his
4199 patch review and work on the x87 trigonometric instruction issues.
4201 * Timezone data is no longer installed. Timezone-related binaries and scripts
4202 will continue to be installed. Users should obtain their timezone data from
4203 their distribution provider or from the tzdata package at
4204 <ftp://munnari.oz.au/pub/>.
4208 * The following bugs are resolved with this release:
4210 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
4211 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
4212 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
4213 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
4214 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
4215 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
4216 13484, 13506, 13515, 13523, 13524, 13538, 13540
4218 * New program pldd to list loaded object of a process
4219 Implemented by Ulrich Drepper.
4221 * Add nss_db support back to glibc. No more dependency on Berkeley db
4222 and support for initgroups lookups.
4223 Implemented by Ulrich Drepper.
4225 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4226 Contributed by HJ Lu.
4228 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4229 Contributed by HJ Lu.
4231 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4232 on x86-32 and x86-64.
4233 Contributed by Liubov Dmitrieva.
4235 * Optimized strchr and strrchr for SSE on x86-32.
4236 Contributed by Liubov Dmitrieva.
4238 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4239 for x86-64 and x86-32.
4240 Contributed by Liubov Dmitrieva.
4242 * New interfaces: scandirat, scandirat64
4243 Implemented by Ulrich Drepper.
4245 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4246 Implemented by Ulrich Drepper.
4248 * nscd now also caches the netgroup database.
4249 Implemented by Ulrich Drepper.
4251 * Integrate libm with gcc's -ffinite-math-only option.
4252 Implemented by Ulrich Drepper.
4254 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4255 to math functions. Implemented by Ulrich Drepper.
4257 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4258 Implemented by Ulrich Drepper.
4260 * New Linux interfaces: process_vm_readv, process_vm_writev
4262 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4263 Implemented by Ulrich Drepper.
4265 * Optimized nearbyint and strcasecmp for PPC.
4266 Implemented by Adhemerval Zanella.
4268 * New locales: bho_IN, unm_US, es_CU, ta_LK
4272 * The following bugs are resolved with this release:
4274 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4275 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4276 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4277 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4278 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4279 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4280 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4281 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4282 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4283 12795, 12811, 12813, 12814, 12841
4285 * The RPC implementation in libc is obsoleted. Old programs keep working
4286 but new programs cannot be linked with the routines in libc anymore.
4287 Programs in need of RPC functionality must be linked against TI-RPC.
4288 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4290 Visible changes of this change include (obviously) the inability to link
4291 programs using RPC functions without referencing the TI-RPC library and the
4292 removal of the RPC headers from the glibc headers.
4293 Implemented by Ulrich Drepper.
4295 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4296 syncfs, setns, sendmmsg
4298 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4299 yue_HK, lij_IT, mhr_RU
4301 * New encodings: CP770, CP771, CP772, CP773, CP774
4303 * New program sotruss to trace calls through PLTs
4304 Implemented by Ulrich Drepper.
4306 * The malloc hook implementation is marked deprecated and will be removed
4307 from the default implementation in the next version. The design never
4308 worked ever since the introduction of threads. Even programs which do
4309 not create threads themselves can use multiple threads created internally.
4313 * The following bugs are resolved with this release:
4315 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4316 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4317 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4318 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4321 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4323 * POWER7 optimizations: memset, memcmp, strncmp
4325 * New optimized string functions for x86-64: strnlen (SSE2),
4326 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4327 Implemented by Ulrich Drepper.
4331 * The following bugs are resolved with this release:
4333 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4334 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4335 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4336 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4337 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4338 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4339 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4340 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4342 * New interfaces: pthread_getname_np, pthread_setname_np
4344 * New Linux interface: recvmmsg
4346 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4348 * The dynamic linker now recognizes supported ABI versions from the
4349 EI_ABIVERSION field in the ELF header.
4350 Implemented by Ulrich Drepper.
4352 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4353 will not be used to fill in password fields in the passwd.byname replies.
4354 Instead it is used to synthesize the shadow.byname table, should it be
4355 missing. This is a useful mode in some installations involving Solaris.
4356 Implemented by Ulrich Drepper.
4358 * New locales: kok_IN, sq_MK, cv_RU
4362 * The following bugs are resolved with this release:
4364 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4365 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4366 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4367 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4368 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4369 10789, 10817, 10823, 10840, 10847
4371 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4373 Implemented by Ulrich Drepper.
4375 * Checking version of longjmp added that fails if an uninitialized stack
4376 frame would be created. Implemented by Ulrich Drepper.
4378 * STT_GNU_IFUNC is now supported in static executables.
4379 Implemented by H.J. Lu.
4381 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4383 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4384 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4385 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4386 Contributed by H.J. Lu.
4388 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4389 Implemented by Ulrich Drepper.
4391 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4393 Contributed by H.J. Lu.
4395 * Support for fma instruction in AVX on x86-64.
4396 Implemented by H.J. Lu and Ulrich Drepper.
4398 * AVX support in x86-64 auditing support in ld.so.
4399 Implemented by H.J. Lu.
4401 * STB_GNU_UNIQUE support added.
4402 Implemented by Ulrich Drepper.
4404 * Implement second fallback mode for optimized DNS lookup for even more
4405 broken environments. If two requests from the same port are not
4406 handled correctly close the socket and open a new one before sending
4407 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4408 can be used to select this mode right away, instead of rediscovering the
4409 necessity is every process again.
4410 Implemented by Ulrich Drepper.
4412 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4413 Implemented by Adam Tkac.
4415 * Optimized iconv conversions for S390x.
4416 Implemented by Andreas Krebbel.
4418 * Using condvars with PI mutexes is now more efficient due to kernel
4419 support for requeueing to PI futexes. NPTL support added for x86-64.
4420 Implemented by Ulrich Drepper.
4422 * New locales: ps_AF, my_MM
4426 * The following bugs are resolved with this release:
4428 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4429 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4430 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4431 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4432 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4434 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4435 Implemented by Ulrich Drepper.
4437 * New Linux interfaces: accept4, fallocate, fallocate64.
4438 Implemented by Ulrich Drepper.
4440 * Correct declarations of string function when used in C++ code. This
4441 could lead to compile errors for invalid C++ code.
4443 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4446 * New POSIX 2008 interface: psiginfo
4447 Implemented by Ulrich Drepper.
4449 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4450 Implemented by Ulrich Drepper.
4452 * Support for selecting between multiple function definitions at runtime
4453 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4455 * The libcrypt library can now use the hash function implementations in
4456 NSS. Implemented by Ulrich Drepper.
4458 * The malloc implementation can be compiled to be less memory efficient
4459 but higher performing in multi-threaded programs.
4460 Implemented by Ulrich Drepper.
4462 * New locales: nan_TW@latin, ks_IN
4464 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4465 Implemented by Ulrich Drepper.
4467 * Extended printf hook support. It is possible to use user-defined types
4468 and extend existing format specifiers.
4469 Implemented by Ulrich Drepper.
4471 * Handling for group shadow files has been added.
4472 Implemented by Ulrich Drepper.
4474 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4475 servers (the case, e.g., for some people using the built-in DNS
4476 server in ADSL modems/routers). There is a once-per-process timeout
4477 in case of a broken server. To avoid it, users can run nscd or put
4478 'options single-request' in /etc/resolv.conf.
4479 Implemented by Ulrich Drepper.
4483 * The following bugs are resolved with this release:
4485 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4486 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4487 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4488 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4489 6968, 6974, 6980, 6995, 7008, 7009, 7029
4491 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4492 up at the same time. Implemented by Ulrich Drepper.
4494 * TLS descriptors for LD and GD on x86 and x86-64.
4495 Implemented by Alexandre Oliva.
4497 * getaddrinfo now handles DCCP and UDPlite.
4498 Implemented by Ulrich Drepper.
4500 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4501 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4502 Implemented by Ulrich Drepper.
4504 * New implementation of memmem, strstr, and strcasestr which is O(n).
4505 Implemented by Eric Blake.
4507 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4509 * Implement "e" option for popen to open file descriptor with the
4510 close-on-exec flag set. Implemented by Ulrich Drepper.
4512 * Implement "b" mode for fmemopen. In this mode writes writes don't
4513 implicitly add a NUL byte and seeks from the end of the buffer really
4514 use the buffer end, not the string length as the basis.
4515 Implemented by Ulrich Drepper.
4517 * Many functions, exported and internal, now atomically set the close-on-exec
4518 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4520 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4522 Implemented by Pravin Satpute.
4524 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4528 * The following bugs are resolved with this release:
4530 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4531 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4532 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4533 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4534 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4535 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4536 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4538 * New locales: bo_CN, bo_IN, shs_CA.
4540 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4542 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4543 Implemented by Pravin Satpute.
4545 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4547 * nscd caches now all timeouts for DNS entries
4548 Implemented by Ulrich Drepper.
4550 * nscd is more efficient and wakes up less often.
4551 Implemented by Ulrich Drepper.
4553 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4554 vdprintf, and obstack_vprintf.
4555 Implemented by Jakub Jelinek.
4557 * Faster memset for x86-64.
4558 Implemented by Harsha Jagasia and H.J. Lu.
4560 * Faster memcpy on x86.
4561 Implemented by Ulrich Drepper.
4563 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4564 Implemented by Ulrich Drepper.
4566 * Faster sqrt and sqrtf implemention for some PPC variants.
4567 Implemented by Steven Munroe.
4571 * The following bugs are resolved with this release:
4573 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4574 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4575 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4576 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4577 5071, 5103, 5104, 5112, 5113, 5184, 5186
4579 * More checking functions: fread, fread_unlocked, open*, mq_open.
4580 Implemented by Jakub Jelinek and Ulrich Drepper.
4582 * Extend fortification to C++. Implemented by Jakub Jelinek.
4584 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4585 by not recognizing 'a' as a modifier when those specs are requested.
4586 Implemented by Jakub Jelinek.
4588 * PPC optimizations to math and string functions.
4589 Implemented by Steven Munroe.
4591 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4592 options to be passed. Implemented by Ulrich Drepper.
4594 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4596 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4597 Implemented by Ulrich Drepper.
4599 * Handle private futexes in the NPTL implementation.
4600 Implemented by Jakub Jelinek and Ulrich Drepper.
4602 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4603 Implemented by Roland McGrath and Ulrich Drepper.
4605 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4607 * SHA-256 and SHA-512 based password encryption.
4608 Implemented by Ulrich Drepper.
4610 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4611 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4614 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4615 Implemented by Ulrich Drepper.
4619 * The following bugs are resolved with this release:
4621 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4622 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4623 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4624 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4625 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4626 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4627 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4630 * New Linux interfaces: epoll_pwait, sched_getcpu.
4632 * New generic interfaces: strerror_l.
4634 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4638 * The following bugs are resolved with this release:
4640 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4641 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4642 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4643 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4644 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4645 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4646 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4647 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4648 3225, 3251, 3252, 3253, 3273
4650 * For Linux, the sorting of addresses returned by getaddrinfo now also
4651 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4652 Implemented by Ulrich Drepper.
4654 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4655 Implemented by Ulrich Drepper.
4657 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4659 * New iconv module for MIK. Contributed by Alexander Shopov.
4661 * For sites with broken group and/or passwd database, the auto-propagate
4662 option of nscd can prevent creating ID lookup entries from the results
4663 of a name lookup and vice versa. This usually is no problem but some
4664 site might have problems with the default behavior.
4665 Implemented by Ulrich Drepper.
4667 * Iterating over entire database in NIS can be slow. With the
4668 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4669 to trade time for memory. The entire database will be read at once.
4670 Implemented by Ulrich Drepper.
4672 * The interfaces introduced in RFC 3542 have been implemented by
4675 * Support for the new ELF hash table format was added by Ulrich Drepper.
4677 * Support for priority inheritance mutexes added by Jakub Jelinek and
4680 * Support for priority protected mutexes added by Jakub Jelinek.
4682 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4683 or_IN, csb_PL, fy_NL, sr_ME.
4687 * More overflow detection functions.
4689 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4690 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4692 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4693 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4694 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4695 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4696 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4697 by Masahide Washizawa.
4699 * It is now possible to install audit libraries for the dynamic linker using
4700 LD_AUDIT. Implemented by Ulrich Drepper.
4702 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4703 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4704 For a libc and libpthread that works well on Linux 2.4 kernels, we
4705 recommend using the stable 2.3 branch.
4707 * The new function open_wmemstream acts like open_memstream,
4708 but uses a wchar_t wide character buffer.
4710 * The new function ppoll is an improved version of poll, similar to pselect.
4712 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4713 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4714 renameat, unlinkat, linkat, symlinkat, readlinkat.
4716 * New Linux kernel system calls: unshare,
4717 inotify_init, inotify_add_watch, inotify_rm_watch.
4719 * The euidaccess function is now also known by the alias eaccess,
4720 for compatibility with some other systems.
4722 * Timezone data updated to 2006b version.
4726 * The following bugs are resolved with this release:
4728 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4729 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4730 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4731 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4732 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4733 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4735 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4737 * As of this release, GCC 4 can be used to compile the C Library.
4739 * Timezone data updated to 2005m version.
4743 * The following bugs are resolved with this release:
4745 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4746 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4747 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4748 777, 787, 821, 822, 823, 825
4750 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4754 * Support for RFC 3678. Real implementations exist only for Linux so far.
4755 Implemented by Ulrich Drepper.
4757 * nscd can now cache entries persistently. Expiring entries are reloaded.
4758 For speedups the cache can be shared in memory with client processes.
4759 Implemented by Ulrich Drepper.
4761 * nscd can now perform SELinux checks.
4762 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4764 * getaddrinfo queries are now cached. Canonical name lookup is performed
4766 Implemented by Ulrich Drepper.
4768 * The nothrow function attribute is used when headers are used by gcc when
4769 compiling C code. This can avoid significant amounts of exception
4772 * The malloc functions perform more error checking and are stricter when
4773 it comes to reacting on errors. The default action is to terminate
4774 the process after showing an error message. Implemented by Ulrich Drepper.
4776 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4777 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4779 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4780 namespaces using the new function dlmopen(). This feature is of course,
4781 like most other dynamic loading functionality, not available in statically
4782 linked applications. Implemented by Ulrich Drepper.
4784 * Low-overhead boundary checking variants of string and some stdio functions
4785 were added. These are to be used in conjunction with a gcc patch by
4786 Jakub Jelinek which adds calls to these functions if possible.
4787 Implemented by Jakub Jelinek and Ulrich Drepper.
4789 * Old code for several operating systems and machine architectures that
4790 have not been in working condition in a long time have been removed from
4791 the main source tree maintained by the GNU C Library's maintainers.
4792 These files are now reside in the separate `ports' source module
4793 that is usable as an add-on when building the library.
4797 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4798 interrogate the dynamic linker, compatible with the Solaris interface.
4800 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4801 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4803 * getifaddrs now uses the netlink interface on Linux to get its information.
4804 Implemented by Thorsten Kukuk.
4806 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4807 Implemented by Ulrich Drepper.
4809 * support for non-executable stacks on x86 has been added. Changes mostly
4812 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4815 * getaddrinfo now performs destination address selection according to
4820 * Thread-safe interfaces for many functions that access locale data
4821 were added in version 2.3, but these features were omitted from NEWS.
4822 Many functions have variants with an `_l' suffix that take a `locale_t'
4823 object as a parameter rather than consulting the current locale.
4824 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4825 create and maintain `locale_t' objects. Additionally, the new function
4826 `uselocale' sets "the current locale" (as used by functions not so
4827 parameterized) set for an individual thread. These features were added
4828 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4830 * The functions getresuid, getresgid, setresuid, and setresgid, which
4831 have long been available on Linux, are now declared in <unistd.h>
4832 and are now also available on the Hurd.
4834 * ELF thread-local storage support (TLS) now works on x86-64.
4836 * The new dynamic string token $LIB is expanded in shared library names.
4837 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4839 * Aldy Hernandez contributed complete software floating point support for
4840 PowerPC machines with no FPU.
4842 * fexecve is implemented on Linux.
4844 * The `btowc' function should work at least twice as fast due to
4845 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4847 * With approriate thread add-ons cancelable functions are now implemented
4848 in libc.so as well. No need to call the function in libpthread. This
4849 change allowed to finally disable the incorrect and expensive handling
4850 of weak definition in ld.so.
4852 * Yet more PLT entries in libc.so have been removed. We finally arrived
4853 at the bare minimum. Startup times improved appropriately.
4855 * Support for the new Linux/x86 system call interface was added. The
4856 AT_SYSINFO auxiliary vector entry is recognized and handled.
4860 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4863 * iconv (the program and the interface) now accepts empty names (excluding
4864 options like //TRANSLIT) to mean "use charset of current locale".
4866 * localedef can now transliterate characters in strings which are not in
4867 the provided charmap. The information from the input locale is used.
4869 * Prelinking support was added for ELF targets. This requires additional
4870 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4872 * Read-only stdio streams now use mmap to speed up operation by eliminating
4873 copying and buffer underflows. To use add 'm' to the mode string of
4874 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4876 * The malloc functions were completely rewritten by Wolfram Gloger based
4877 on Doug Lea's malloc-2.7.0.c.
4879 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4880 implementation of regex.
4882 * Bruno Haible upgraded the iconv and locale implementation to support
4885 * Contents of the LC_* and LANG environment variables in the CEN style are
4886 not recognized anymore. It never was used. Change by Ulrich Drepper.
4888 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4889 thread-local storage (TLS) ABI on some platforms.
4890 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4892 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4893 EUC-JISX0213, and TSCII.
4895 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4896 BSD-compatible interface for getting all network interface addresses.
4897 Implementation for IPv4 by Roland McGrath.
4899 * Loading of locale data is faster due to the introduction of a locale
4900 archive. Implemented by Roland McGrath and Ulrich Drepper.
4902 * Startup times are significantly reduced by not using exported functions
4903 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4906 * Steven Munroe contributed a port to PowerPC64/Linux.
4910 * The Hurd now uses the GNU libio implementation of stdio rather than the
4911 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4913 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4914 with the same behavior as the Linux system call of the same name.
4918 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4919 128-bit long double format.
4921 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4922 IBM1161, and IBM1162 charsets.
4924 * Andreas Jaeger contributed a port to x86-64/Linux.
4926 * Peter Bruin contributed a port to PowerPC/Hurd.
4928 * libc functions using I/O streams now can handle wide-oriented streams
4931 * optimizations in the dynamic linker. Binaries created by recent binutils
4932 versions start up quicker due to reduced time spent on relocations.
4934 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4938 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4939 asinh, atanh, j0 for the 128-bit long double format.
4941 * Bruno Haible updated all the code handling Unicode in some form to
4942 support Unicode 3.1.
4944 * Speed of regex for single-byte locales is back to previous levels.
4945 Patch by Isamu Hasegawa.
4947 * Alpha, SPARC, and IA-64 now also using floating stacks.
4949 * Startup time of internationalized applications greatly improved through
4950 iconv cache. Use iconvconfig to generate the cache file.
4951 Contributed by Ulrich Drepper.
4953 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4954 severe performance problems. Patch by David Mosberger.
4956 * The Hurd port got a lot more functionality like AIO, various stdio
4957 extensions, etc. Mainly done by Roland McGrath.
4959 * mtrace can now lookup symbols in shared libraries.
4963 * Intel's IA-64 math library is largely integrated. It provides fast and
4964 accurate implementatations for most basic and standard math functions
4965 in float, double, and long double format.
4967 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4968 and asin for the 96-bit long double format and asin, log, tan for the
4969 128-bit long double format.
4971 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4972 The basic double functions exist today. Contributed by Abraham Ziv
4973 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4974 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4976 * An asynchronous name lookup library was added. The interface is designed
4977 after POSIX AIO. The proposal was circulated beforehand to get comments.
4978 No negative ones came in. Implemented by Ulrich Drepper.
4980 * Port to S390/64bit contributed by Martin Schwidefsky
4981 <schwidefsky@de.ibm.com>.
4983 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4984 of functions for Linux/IA-64.
4986 * The RPC code is now thread safe. Threads can now use the same service
4987 of different services at the same time. Patch by Eric Norum
4988 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4990 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4991 family of functions for Linux/S390.
4993 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4994 of functions for Linux/x86.
4996 * Port to Linux/CRIS contributed by Axis Communications.
5000 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
5001 we can now check for namespace violations and missing declarations. The
5002 result is that almost all headers are now Unix-compliant (as defined in
5003 the upcoming XPG6). The negative side is that some programs might need
5004 corrections, too, if they depend on the incorrect form of the headers in
5005 previous versions which defined too many symbols and included too many
5008 * regex now handles multibyte character sets correctly.
5009 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
5011 * iconv (the program) does now conform to the upcoming XPG6 and handles
5012 charmaps. Instead of the charset names the path of charmaps can be
5013 provided and the conversion happens based on this data.
5014 Contributed by Ulrich Drepper.
5016 * The locale program now provides detailed information about the installed
5021 only lists the names of the supported locales
5025 provides details such as country, language, and codeset name.
5026 Contributed by Ulrich Drepper.
5030 * The gencat program now parses the input file according to the charset
5031 selected by the LC_CTYPE category. This is important for stateful
5032 character sets. To make generating catalogs easier there is a way
5033 to overwrite the charset selected by the locale: before the first
5034 message or $ quote line the catalog can contain a line like
5036 $ codeset=ISO-8859-2
5038 to select the charset (ISO-8859-2 in this case).
5040 Implemented by Shinya Hanataka and Ulrich Drepper.
5042 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
5043 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
5044 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
5046 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
5047 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
5049 * The LANGUAGE environment variable is now ignored unless the locale is
5050 changed from the default "C" locale.
5052 * The usual bug fixes.
5056 * Greg McGary added runtime support for bounds checking using gcc's
5057 new -fbounded-pointers option. ix86 target is complete. PowerPC
5060 * Thorsten Kukuk added secure mode support to nscd.
5062 * The Berkeley db libraries have been removed.
5064 Related, the nss_db module is now in a separate package since it
5065 obviously requires a database library being available.
5067 * Wide character I/O streams implemented by Ulrich Drepper.
5069 * Functions from the extended socket API added by Ulrich Drepper.
5071 * Functions feenableexcept and fedisableexcept to control the
5072 behaviour of individual exceptions have been added by Andreas Jaeger.
5074 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
5076 * The resolver code has been updated from bind 8.2.3-T5B which supports
5077 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
5080 This change could in some situations effect backward compatibility. Since
5081 now `_res' is a thread-local instead of a global variable, modifying it
5082 in one thread does not have any effect in other threads.
5084 The resolver library was also extended to allow IPv6 as the transport
5085 protocol for the requests. This work was done by Stig Venaas.
5087 * Compatibility code for K&R C compilers has been removed from the
5088 header files. A ISO C compiler is needed to use the library
5089 (conforming to either C89 or C99 standard).
5091 * Complete rewrite of the localedef program to support multibyte character
5092 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
5093 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
5094 Implemented by Ulrich Drepper.
5096 Bruno Haible significantly improved the generation and use of the data
5097 structures for the wide character tables.
5099 * Plural handling in gettext implemented by Ulrich Drepper.
5101 * The utmp daemon has been removed.
5103 * The port to MIPS-Linux has been finished by Andreas Jaeger.
5105 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
5108 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
5110 * POSIX barriers implemented by Kaz Kylheku.
5112 * POSIX spawn function family implemented by Ulrich Drepper.
5114 * POSIX spinlocks are now available.
5116 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
5118 * the configure option --enable-kernel=X.Y.Z allows to strip out
5119 compatibility for kernel versions before X.Y.Z. This is currently only
5120 implemented for Linux.
5122 * the sockaddr_in6 structure changed. The IPv6 working group added a new
5123 field sin6_scope_id. This means that all programs using IPv6 should be
5124 recompiled. Don't expect binary compatibility with previous glibc
5127 * various conversion modules for IBM character sets contributed by
5130 * IA-64 port by Jes Sorensen and HJ Lu.
5144 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
5146 * New xdr functions are added; some rpc functions are now 64bit clean.
5148 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
5150 * Fixed known incompatibilities with glibc 2.0.
5152 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
5154 * Optimized a number of functions (especially the ELF dynamic loader).
5156 * Update timezone data files.
5158 * lots of charmaps corrections
5160 * some new locale definitions and charmaps
5165 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
5166 conform to POSIX member type requirements. Symbol versions have been
5167 adjusted as needed within the library, and for direct use by applications,
5168 but there is potential for problems if third-party libraries use
5169 struct timeval as part of their interface. This does not present
5170 a problem for X and other "essential" system libraries.
5172 * An additional locale model to support C++ Standard Library locale
5173 model and probably more was implemented by Ulrich Drepper.
5175 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
5178 * Miles Bader provided the `argp' function family to support hierachical
5179 command line argument parsing, layered on top of getopt.
5181 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
5183 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
5186 * scanf recognizes the %a and %A format for scanning floating point numbers.
5188 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
5189 information and interfaces for the available integer types.
5191 * about 130 new math functions were added to implement the ISO C9x math
5194 * the new header <complex.h> contains definitions of the complex math
5195 functions from ISO C 9X.
5197 * the new header <tgmath.h> defines generic macros to use complex or
5198 real valued functions.
5200 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
5202 * Andreas Jaeger provided a test suite for the math library.
5204 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
5206 * Ulrich Drepper added character set conversion functions (iconv).
5208 * Optimized string functions have been added.
5210 * The localedata addon is now part of glibc.
5212 * An implementation of profiling shared libraries was added by Ulrich Drepper.
5214 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
5215 daemon for NSS (nscd).
5217 Missing a better place here are some numbers on improvements. Under
5218 Linux 2.1.125 un-tar-ing the kernel sources takes
5222 using local files 12.19s 6.88s 22.91s
5224 using NIS 13.92s 8.91s 26.34s
5226 using NIS & nscd 10.37s 7.34s 25.30s
5228 using NIS+ 27.57s 30.37s 640.46s
5230 using NIS+ & nscd 10.25s 7.83s 26.51s
5232 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5234 Keep in mind that non-namelookup related operations dominate above times.
5235 It was just a common complain that using NIS+ unpacking the kernel is
5238 [1] The old nscd implementation is not available anymore since it was
5239 distributed with glibc up to version 2.0.98 and thus is now replaced.
5241 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5243 * Mark Kettenis provided a Hesiod NSS module.
5245 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5246 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5248 * rcmd can now handle netgroups (Dick Streefland).
5250 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5253 * Support for the IPv6 protocol has been added to the socket API, as per the
5254 latest draft standards.
5256 * Support for Linux 2.2 has been added.
5258 * Interface changes relative to the latest 2.0.x release:
5259 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5260 addseverity NEW: Unix98
5261 alphasort64 NEW: LFS
5262 argp_err_exit_status NEW: argp, GNU ext
5263 argp_error NEW: argp, GNU ext
5264 argp_failure NEW: argp, GNU ext
5265 argp_help NEW: argp, GNU ext
5266 argp_parse NEW: argp, GNU ext
5267 argp_program_bug_address NEW: argp, GNU ext
5268 argp_program_version NEW: argp, GNU ext
5269 argp_program_version_hook NEW: argp, GNU ext
5270 argp_state_help NEW: argp, GNU ext
5271 argp_usage NEW: argp, GNU ext
5272 authdes_create NEW: Secure RPC
5273 authdes_getucred NEW: Secure RPC
5274 authdes_pk_create NEW: Secure RPC
5275 backtrace NEW: GNU ext.
5276 backtrace_symbols NEW: GNU ext.
5277 backtrace_symbols_fd NEW: GNU ext.
5279 cacosf NEW: ISO C 9x
5280 cacosh NEW: ISO C 9x
5281 cacoshf NEW: ISO C 9x
5282 cacoshl NEW: ISO C 9x
5283 cacosl NEW: ISO C 9x
5290 casinf NEW: ISO C 9x
5291 casinh NEW: ISO C 9x
5292 casinhf NEW: ISO C 9x
5293 casinhl NEW: ISO C 9x
5294 casinl NEW: ISO C 9x
5296 catanf NEW: ISO C 9x
5297 catanh NEW: ISO C 9x
5298 catanhf NEW: ISO C 9x
5299 catanhl NEW: ISO C 9x
5300 catanl NEW: ISO C 9x
5301 cbc_crypt NEW: Secure RPC
5305 ccoshf NEW: ISO C 9x
5306 ccoshl NEW: ISO C 9x
5312 cimagf NEW: ISO C 9x
5313 cimagl NEW: ISO C 9x
5314 clearerr_locked REMOVED
5315 clntunix_create NEW: sunrpc ext
5317 clog10 NEW: ISO C 9x
5318 clog10f NEW: ISO C 9x
5319 clog10l NEW: ISO C 9x
5329 cprojf NEW: ISO C 9x
5330 cprojl NEW: ISO C 9x
5332 crealf NEW: ISO C 9x
5333 creall NEW: ISO C 9x
5338 csinhf NEW: ISO C 9x
5339 csinhl NEW: ISO C 9x
5342 csqrtf NEW: ISO C 9x
5343 csqrtl NEW: ISO C 9x
5347 ctanhf NEW: ISO C 9x
5348 ctanhl NEW: ISO C 9x
5350 des_setparity NEW: Secure RPC
5351 ecb_crypt NEW: Secure RPC
5352 endutxent NEW: Unix98
5354 exp10f NEW: ISO C 9x
5355 exp10l NEW: ISO C 9x
5359 fattach NEW: STREAMS
5360 fdetach NEW: STREAMS
5364 feclearexcept NEW: ISO C 9x
5365 fegetenv NEW: ISO C 9x
5366 fegetexceptflag NEW: ISO C 9x
5367 fegetround NEW: ISO C 9x
5368 feholdexcept NEW: ISO C 9x
5370 feraiseexcept NEW: ISO C 9x
5371 ferror_locked REMOVED
5372 fesetenv NEW: ISO C 9x
5373 fesetexceptflag NEW: ISO C 9x
5374 fesetround NEW: ISO C 9x
5375 fetestexcept NEW: ISO C 9x
5376 feupdateenv NEW: ISO C 9x
5377 fflush_locked REMOVED
5381 fgets_unlocked NEW: GNU ext.
5382 fileno_locked REMOVED
5394 fputc_locked REMOVED
5395 fputs_unlocked NEW: GNU ext.
5396 fread_unlocked NEW: GNU ext.
5401 fstatvfs NEW: Unix98
5405 ftruncate64 NEW: LFS
5407 fwrite_unlocked NEW: GNU ext.
5408 gai_strerror NEW: IPv6
5412 getchar_locked REMOVED
5414 getdate_err NEW: Unix98
5415 getdate_r NEW: GNU ext.
5417 getnameinfo NEW: IPv6
5418 getnetname NEW: Secure RPC
5419 getpmsg NEW: STREAMS
5420 getpt NEW: Unix98 PTY
5421 getrlimit64 NEW: LFS
5422 getutxent NEW: Unix98
5423 getutxid NEW: Unix98
5424 getutxline NEW: Unix98
5425 glob64 NEW: GNU ext.
5426 globfree64 NEW: GNU ext.
5427 gnu_get_libc_release NEW: GNU ext.
5428 gnu_get_libc_version NEW: GNU ext.
5429 grantpt NEW: Unix98 PTY
5430 host2netname NEW: Secure RPC
5432 iconv_close NEW: iconv
5433 iconv_open NEW: iconv
5434 if_freenameindex NEW: IPv6
5435 if_indextoname NEW: IPv6
5436 if_nameindex NEW: IPv6
5437 if_nametoindex NEW: IPv6
5438 in6addr_any NEW: IPv6
5439 in6addr_loopback NEW: IPv6
5440 inet6_isipv4mapped NEW: IPv6
5441 isastream NEW: STREAMS
5442 iswblank NEW: GNU ext.
5443 key_decryptsession NEW: Secure RPC
5444 key_decryptsession_pk NEW: Secure RPC
5445 key_encryptsession NEW: Secure RPC
5446 key_encryptsession_pk NEW: Secure RPC
5447 key_gendes NEW: Secure RPC
5448 key_get_conv NEW: Secure RPC
5449 key_secretkey_is_set NEW: Secure RPC
5450 key_setnet NEW: Secure RPC
5451 key_setsecret NEW: Secure RPC
5452 llrint NEW: ISO C 9x
5453 llrintf NEW: ISO C 9x
5454 llrintl NEW: ISO C 9x
5455 llround NEW: ISO C 9x
5456 llroundf NEW: ISO C 9x
5457 llroundl NEW: ISO C 9x
5462 lrintf NEW: ISO C 9x
5463 lrintl NEW: ISO C 9x
5464 lround NEW: ISO C 9x
5465 lroundf NEW: ISO C 9x
5466 lroundl NEW: ISO C 9x
5468 makecontext NEW: Unix98
5469 mempcpy NEW: GNU ext.
5472 modify_ldt NEW: kernel
5476 nearbyint NEW: ISO C 9x
5477 nearbyintf NEW: ISO C 9x
5478 nearbyintl NEW: ISO C 9x
5479 netname2host NEW: Secure RPC
5480 netname2user NEW: Secure RPC
5481 nexttoward NEW: ISO C 9x
5482 nexttowardf NEW: ISO C 9x
5483 nexttowardl NEW: ISO C 9x
5487 passwd2des NEW: Secure RPC
5489 pow10f NEW: GNU ext.
5490 pow10l NEW: GNU ext.
5493 printf_size NEW: GNU ext.
5494 printf_size_info NEW: GNU ext.
5495 profil_counter REMOVED
5496 pthread_mutexattr_getkind_np REPLACED
5497 pthread_mutexattr_setkind_np REPLACED
5498 ptsname NEW: Unix98 PTY
5499 ptsname_r NEW: Unix98 PTY
5501 putchar_locked REMOVED
5502 putgrent NEW: GNU ext.
5504 putpmsg NEW: STREAMS
5505 pututxline NEW: Unix98
5509 readdir64_r NEW: LFS
5510 remquo NEW: ISO C 9x
5511 remquof NEW: ISO C 9x
5512 remquol NEW: ISO C 9x
5514 roundf NEW: ISO C 9x
5515 roundl NEW: ISO C 9x
5517 scalbln NEW: ISO C 9x
5518 scalblnf NEW: ISO C 9x
5519 scalblnl NEW: ISO C 9x
5521 sendfile NEW: kernel
5522 setcontext NEW: Unix98
5523 setrlimit64 NEW: LFS
5524 setutxent NEW: Unix98
5526 sigignore NEW: Unix98
5527 sigqueue NEW: POSIX.1b
5528 sigrelse NEW: Unix98
5529 sigset NEW: POSIX.1b
5530 sigtimedwait NEW: POSIX.1b
5531 sigwaitinfo NEW: POSIX.1b
5532 sincos NEW: GNU ext.
5533 sincosf NEW: GNU ext.
5534 sincosl NEW: GNU ext.
5538 strcasestr NEW: GNU ext.
5539 strtoimax NEW: ISO C 9x
5540 strtoumax NEW: ISO C 9x
5541 strverscmp NEW: GNU ext.
5542 svcauthdes_stats NEW: Secure RPC
5543 svcunix_create NEW: sunrpc etx
5544 svcunixfd_create NEW: sunrpc ext
5545 swapcontext NEW: Unix98
5546 tcgetsid NEW: Unix98 PTY
5547 tdestroy NEW: GNU ext.
5548 tgamma NEW: ISO C 9x
5549 tgammaf NEW: ISO C 9x
5550 tgammal NEW: ISO C 9x
5554 truncf NEW: ISO C 9x
5555 truncl NEW: ISO C 9x
5557 unlockpt NEW: Unix98 PTY
5558 updwtmpx NEW: Unix98
5559 user2netname NEW: Secure RPC
5560 utmpxname NEW: Unix98
5561 versionsort NEW: GNU ext.
5562 versionsort64 NEW: GNU ext.
5564 wcscasecmp NEW: GNU ext.
5565 wcsncasecmp NEW: GNU ext.
5566 wcsnlen NEW: GNU ext.
5567 wcstoimax NEW: ISO C 9x
5568 wcstoll NEW: ISO C 9x
5569 wcstoull NEW: ISO C 9x
5570 wcstoumax NEW: ISO C 9x
5572 wordexp NEW: POSIX.2
5573 wordfree NEW: POSIX.2
5574 write_profiling REMOVED
5575 xdecrypt NEW: Secure RPC
5576 xdr_authdes_cred NEW: Secure RPC
5577 xdr_authdes_verf NEW: Secure RPC
5578 xdr_cryptkeyarg NEW: Secure RPC
5579 xdr_cryptkeyarg2 NEW: Secure RPC
5580 xdr_cryptkeyres NEW: Secure RPC
5581 xdr_getcredres NEW: Secure RPC
5582 xdr_key_netstarg NEW: Secure RPC
5583 xdr_key_netstres NEW: Secure RPC
5584 xdr_keybuf NEW: Secure RPC
5585 xdr_keystatus NEW: Secure RPC
5586 xdr_netnamestr NEW: Secure RPC
5587 xdr_sizeof NEW: Secure RPC
5588 xdr_unixcred NEW: sunrpc ext
5589 xencrypt NEW: Secure RPC
5590 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5601 * inet_ntoa is thread-safe
5603 * updwtmp is moved from libutil to libc
5605 * rewrite of cbrt function
5607 * update of timezone data
5621 * add atoll function
5623 * fix complex problems in Berkeley DB code
5625 * fix math functions
5629 * fixed lots of header problems (especially Linux/GNU specific)
5631 * dynamic loader preserves all registers
5633 * Roland McGrath provided support for handling of auxiliary objects in
5634 the ELF dynamic loader.
5636 * support for parallel builds is improved
5640 * GNU extensions are no longer declared by default. To enable them you
5641 must define the macro `_GNU_SOURCE' in your program or compile with
5644 * The library has changed from using GNU ld symbol aliases to using weak
5645 symbols where available. The ELF object file format supports weak
5646 symbols; GNU ld also supports weak symbols in the a.out format. (There
5647 is also now support for other GNU ld extensions in ELF. Use the
5648 `--with-elf' option to configure to indicate you have ELF, and
5649 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5650 of many files which contained only symbol aliases, reducing the size of
5651 the source and the compiled library; many other files were renamed to
5652 less cryptic names previously occupied by the symbol alias files.
5653 There is a new header file <elf.h> for programs which operate on
5654 files in the ELF format.
5656 * Converted to Autoconf version 2, so `configure' has more options.
5657 Run `configure --help' to see the details.
5659 * The library can now be configured to build profiling, highly-optimized
5660 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5661 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5662 `configure' enable building these extra libraries. The shared library is
5663 built by default when using both ELF and GNU ld. When shared libraries
5664 are enabled, the new library `-ldl' is available for arbitrary run-time
5665 loading of shared objects; its interface is defined in <dlfcn.h>. The
5666 new header file <link.h> gives access to the internals of the run-time
5667 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5668 application of same name on other systems and it provides information
5669 about dynamically linked binaries.
5671 * The C library now provides the run-time support code for profiling
5672 executables compiled with `-pg'. Programs can control the profiling code
5673 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5674 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5675 the support for this file format was contributed by David Mosberger-Tang.
5677 * The math code has been replaced with a math library based on fdlibm from
5678 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5679 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5680 functions. The math functions now reside in a separate library, so
5681 programs using them will need to use `-lm' their linking commands.
5683 * John C. Bowman contributed optimized ix87 assembler inline functions.
5685 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5686 mechanism similar to that found in Solaris 2. This is now used for the
5687 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5688 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5689 file controls what services are used for each individual database. This
5690 works by loading shared libraries with names specified in `nsswitch.conf',
5691 so service modules can be changed or added at any time without even
5692 relinking any program. Currently there are the file, db, and NIS based
5693 NSS services available.
5695 * The new functions `strtoq' and `strtouq' parse integer values from
5696 strings, like `strtol' and `strtoul', but they return `long long int' and
5697 `unsigned long long int' values, respectively (64-bit quantities).
5699 * The new functions `strtof' and `strtold' parse floating-point values from
5700 strings, like `strtod', but they return `float' and `long double' values,
5701 respectively (on some machines `double' and `long double' are the same).
5703 * Ulrich Drepper has contributed new implementations of the floating-point
5704 printing and reading code used in the `printf' family of functions and
5705 `strtod', `strtof', and `strtold'. These new functions are perfectly
5706 accurate, and much faster than the old ones.
5708 * The implementation of the POSIX locale model was completely rewritten by
5709 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5710 to compile the POSIX locale definition.
5712 * The former dummy implementations of the strcoll and strxfrm function are
5713 now replaced by fully functional code contributed by Ulrich Drepper. The
5714 collation information comes from the POSIX locale definitions.
5716 * The new header <langinfo.h> defines an interface for accessing
5717 various locale-dependent data (using the locale chosen with `setlocale').
5719 * Ulrich Drepper has contributed a new suite of functions for operation on
5720 wide-character and multibyte-character strings, in <wchar.h>;
5721 and classification and case conversion of wide characters, in <wctype.h>.
5722 These new functions are conforming to the ISO C, Amendement 1 specification.
5724 * There is now a second implementation of the standard I/O library available.
5725 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5726 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5728 * You can now use positional parameter specifications in format strings
5729 for the `printf' and `scanf' families of functions. For example,
5730 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5731 ``Number 6, Mr Jones''. This is mainly useful when providing different
5732 format strings for different languages, whose grammars may dictate
5733 different orderings of the values being printed. To support this
5734 feature, the interface for `register_printf_handler' has changed; see
5735 the header file <printf.h> for details.
5737 * The `printf' and `scanf' families of functions now understand a new
5738 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5739 to group numbers as indicated by the locale; for `scanf' and friends, this
5740 says to accept as valid only a number with all the proper grouping
5741 separators in the right places. In the default "C" locale, numbers are
5742 not grouped; but locales for specific countries will define the usual
5743 conventions (i.e. separate thousands with `,' in the US locale).
5745 * The pgrp functions have been regularized, slightly incompatibly but much
5746 less confusingly. The core functions are now `getpgid' and `setpgid',
5747 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5748 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5749 provided for compatibility. There is no longer an incompatible `getpgrp'
5750 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5752 * The new header file <fts.h> and suite of functions simplify programs that
5753 operate on directory trees. This code comes from 4.4 BSD.
5755 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5756 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5757 NSS scheme used in glibc.
5759 * There is a new malloc debugging hook `__memalign_hook'.
5761 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5762 `unsigned int' in <sys/types.h>. These are for compatibility only and
5763 their use is discouraged.
5765 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5766 done differently, so that it works even without GNU ld.
5768 * New function `euidaccess' checks allowed access to a file like `access',
5769 but using the effective IDs instead of the real IDs.
5771 * The time zone data files have been updated for the latest and greatest
5772 local time conventions of the countries of the world.
5774 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5777 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5778 for formatting floating-point numbers. They are provided only for
5779 compatibility; new programs should use `sprintf' instead. There are
5780 also equivalent function for the `long double' floating-point type and
5781 all functions also exist in a reentrant form.
5783 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5784 functions for maintaining the login-record files (primarily of use to
5785 system programs such as `login'), and convenient functions for
5786 allocating and initializing a pseudo-terminal (pty) device.
5788 * Ulrich Drepper has contributed new support for System V style
5789 shared memory and IPC on systems that support it.
5791 * Ulrich Drepper has contributed several miscellaneous new functions found
5792 in System V: The `hsearch' family of functions provide an effective
5793 implementation of hash tables; `a64l' and `l64a' provide a very simple
5794 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5797 * Ulrich Drepper has contributed new reentrant counterparts for the
5798 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5800 * Ulrich Drepper has contributed new, highly-optimized versions of several
5801 string functions for the i486/Pentium family of processors.
5803 * Ulrich Drepper has updated the Linux-specific code, based largely
5804 on work done in Hongjiu Lu's version of GNU libc for Linux.
5805 The GNU library now supports Linux versions 2.0.10 and later,
5806 using the ELF object file format (i[3456]86-*-linux).
5808 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5810 * David Mosberger-Tang and Richard Henderson have ported the C library
5811 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5812 dynamic linking support for ELF/Alpha.
5814 * Richard Henderson contributed several Alpha optimized assembler function
5815 for arithmetic and string handling.
5817 * Ulrich Drepper has contributed a new set of message catalog functions to
5818 support multiple languages using the <libintl.h> interface, for use with
5819 his new package GNU gettext. Translation volunteers have contributed
5820 catalogs of the library's messages in Spanish, German, and Korean.
5822 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5823 program and the `catgets' function for reading the catalog files it
5824 creates. (The <libintl.h> interface is preferred; we include the
5825 <nl_types.h> interface using `catgets' only for source compatibility with
5826 programs already written to use it.)
5828 * New header file <values.h> gives SVID-compatible names for <limits.h>
5831 * Various new macros, declarations, and small header files for compatibility
5834 * New function `group_member' is a convenient way to check if a process has
5835 a given effective group ID.
5837 * When using GCC 2.7 and later, the socket functions are now declared in a
5838 special way so that passing an argument of type `struct sockaddr_in *',
5839 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5840 `struct sockaddr *' type, does not generate a type-clash warning.
5842 * New function `error' declared in header file <error.h> is a convenient
5843 function for printing error messages and optionally exiting; this is the
5844 canonical function used in GNU programs. The new functions `err', `warn',
5845 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5846 doing the same thing.
5848 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5849 POSIX.2 `glob' function to do ~ and {...} expansion.
5851 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5852 `clearenv' which is used in POSIX.9 is also available.
5854 * New function `getsid' returns session ID number on systems that support it.
5856 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5857 files <db.h> and <mpool.h> provide a rich set of functions for several
5858 types of simple databases stored in memory and in files, and <ndbm.h> is
5859 an old `ndbm'-compatible interface using the `db' functions. Link with
5860 `-ldb' to get these functions.
5862 * New macro `strdupa' copies a string like `strdup', but uses local stack
5863 space from `alloca' instead of dynamic heap space from `malloc'.
5865 * New function `strnlen' is like `strlen' but searches only a given maximum
5866 number of characters for the null terminator. `stpncpy', `strndup' and
5867 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5870 * New function `statfs' in header <sys/statfs.h>.
5872 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5873 provide convenient functions for operating on blocks of null-terminated
5876 * A new suite of functions in <utmp.h> handle all the details of reading
5877 and writing the utmp file.
5879 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5882 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5883 completely POSIX compliant and also implemented the extended functionality
5884 to handle alternate digit representation and alternate era date formats.
5886 * Ulrich Drepper provided an implementation of the `strptime' function
5887 defined in XPG4.2 which transforms a string into a `struct tm' value.
5889 * Paul Eggert provided the tzselect shell script as part of the timezone
5890 code. The shell script makes it easy to select the correct timezone
5893 * The implementation of the malloc family of functions is completely replaced
5894 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5895 The implementation uses the mmap function (if available) and it is
5896 optimized for the use in multi threaded programs.
5898 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5899 functions. This new functionality is usable by specifying a special
5900 salt string and it is compatible with implementation on *BSD systems.
5902 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5903 `getsubopt' to handle second level command line options, `bsd_signal'
5904 to access BSD style `signal' functionality, the obsolete `regexp' style
5907 * the `lchown' function is available on system which support this
5910 * The implementation of the shadow password handling function was contributed
5913 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5915 * POSIX.1g support was added. The <sys/select.h> header is available,
5916 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5917 implementation of `getaddrinfo'.
5921 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5923 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5924 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5926 * The new function `daemon' from 4.4 BSD is useful for server programs that
5927 want to put themselves in the background.
5929 * Joel Sherrill has contributed support for several standalone boards that
5930 run without an operating system.
5932 * `printf', `scanf' and friends now accept a `q' type modifier for long
5933 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5935 * All of the code taken from BSD (notably most of the math and networking
5936 routines) has been updated from the BSD 4.4-Lite release.
5938 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5940 * The new functions `getdomainname' and `setdomainname' fetch or change the
5941 YP/NIS domain name. These are system calls which exist on systems which
5944 * The time zone data files have been updated for the latest international
5947 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5948 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5952 * The C library now includes support for Sun RPC, from Sun's free
5953 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5954 are included. (There is still no support for YP.)
5956 * Tom Quinn has contributed a port of the C library to SGI machines running
5957 Irix 4 (mips-sgi-irix4).
5959 * The new `lockf' function is a simplified interface to the locking
5960 facilities of `fcntl', included for compatibility.
5962 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5964 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5966 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5969 * The error message printed by `assert' for a failed assertion now includes
5970 the name of the program (if using GNU ld) and the name of the calling
5971 function (with versions of GCC that support this).
5973 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5975 * The library now includes the <sys/mman.h> header file and memory
5976 management functions `mmap', `munmap', `mprotect', `msync', and
5977 `madvise', on systems that support those facilities.
5979 * The interface for `mcheck' has changed slightly: the function called to
5980 abort the program when an allocation inconsistency is detected now takes
5981 an argument that indicates the type of failure. The new function
5982 `mprobe' lets you request a consistency check for a particular block at
5983 any time (checks are normally done only when you call `free' or `realloc'
5986 * It is now possible to easily cross-compile the C library, building on one
5987 system a library to run on another machine and/or operating system. All
5988 you need to do is set the variable `HOST_CC' in `configparms' to the
5989 native compiler for programs to run on the machine you are building on (a
5990 few generator programs are used on Unix systems); set `CC' to the
5993 * The new function `fexecve' (only implemented on the GNU system) executes
5994 a program file given a file descriptor already open on the file.
5998 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5999 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
6001 * You can set the variable `libprefix' in `configparms' to specify a prefix
6002 to be prepended to installed library files; this makes it easy to install
6003 the GNU C library to be linked as `-lgnuc' or whatever.
6005 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
6006 copies a limited number of characters from a string, and returns the
6007 address of the last character written.
6009 * You no longer need to check for whether the installed `stddef.h' is
6010 compatible with the GNU C library. configure now checks for you.
6012 * You can now define a per-stream `fileno' function to convert the
6013 stream's cookie into an integral file descriptor.
6015 * ``malloc (0)'' no longer returns a null pointer. Instead, it
6016 allocates zero bytes of storage, and returns a unique pointer which
6017 you can pass to `realloc' or `free'. The behavior is undefined if
6018 you dereference this pointer.
6020 * The C library now runs on Sony NEWS m68k machines running either
6021 NewsOS 3 or NewsOS 4.
6023 * The new `syscall' function is a system-dependent primitive function
6024 for invoking system calls. It has the canonical behavior on Unix
6025 systems, including unreliable return values for some calls (such as
6026 `pipe', `fork' and `getppid').
6028 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
6029 to `EAGAIN', which is the preferred name. On systems whose kernels
6030 use two distinct codes, the C library now translates EWOULDBLOCK to
6031 EAGAIN in every system call function.
6035 * The GNU C Library Reference Manual is now distributed with the library.
6036 `make dvi' will produce a DVI file of the printed manual.
6037 `make info' will produce Info files that you can read on line using C-h i
6038 in Emacs or the `info' program.
6039 Please send comments on the manual to bug-glibc-manual@gnu.org.
6041 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
6043 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
6045 * Jason Merrill has contributed a port to the Sequent Symmetry running
6046 Dynix version 3 (i386-sequent-dynix).
6048 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
6049 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
6051 * New function `memory_warnings' lets you arrange to get warnings when
6052 malloc is running out of memory to allocate, like Emacs gives you.
6054 * The C library now contains the relocating allocator used in Emacs 19 for
6055 its editing buffers. This allocator (ralloc) minimizes allocation
6056 overhead and fragmentation by moving allocated regions around whenever it
6057 needs to. You always refer to a ralloc'd region with a "handle" (a
6058 pointer to a pointer--an object of type `void **').
6060 * There is a new `printf' format: `%m' gives you the string corresponding
6061 to the error code in `errno'.
6063 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
6064 or `%[' conversion, but instead of filling in a fixed-sized buffer you
6065 pass, the `a' modifier says to fill in a `char **' you pass with a
6068 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
6069 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
6070 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
6072 * `mkstemp' is a traditional Unix function to atomically create and open a
6073 uniquely-named temporary file.
6077 * The standard location for the file that says what the local timezone is
6078 has changed again. It is now `/usr/local/etc/localtime' (or more
6079 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
6081 * The distribution no longer contains any files with names longer than 14
6084 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
6085 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
6087 * New functions `ttyslot' and `syslog' from 4.4 BSD.
6091 * The configuration process has changed quite a bit. The `configure'
6092 script is now used just like the configuration scripts for other GNU
6093 packages. The `sysdeps' directory hierarchy is much rearranged.
6094 The file `INSTALL' explains the new scheme in detail.
6096 * The header files no longer need to be processed into ANSI C and
6097 traditional C versions. There is just one set of files to install, and
6098 it will work with ANSI or old C compilers (including `gcc -traditional').
6100 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
6101 MIPS DECStation running Ultrix 4.
6103 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
6104 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
6105 made itself into a shared library.
6107 * Yet further improved support for the i386, running 4.3 BSD-like systems
6108 (such as Mach 3 with the Unix single-server), or System V.
6110 * New function `strncasecmp' to do case-insensitive string comparison
6111 with limited length.
6113 * New function `strsep' is a reentrant alternative to `strtok'.
6115 * New functions `scandir' and `alphasort' for searching directories.
6117 * New function `setenv' is a better interface to `putenv'.
6119 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
6120 function for traversing a directory tree.
6122 * The GNU obstack package is now also part of the C library.
6123 The new function `open_obstack_stream' creates a stdio stream that
6124 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
6125 formatted output directly to an obstack.
6127 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
6128 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
6130 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
6132 * The new functions `strfry' and `memfrob' do mysterious and wonderful
6133 things to your strings.
6135 * There are some new test programs: test-fseek, testmb, and testrand.
6137 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
6138 These ports are not finished, but are a good starting place for really
6139 supporting those systems.
6141 * `/etc/localtime' is now the standard location for the file that says what
6142 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
6143 This follows the general principle that `/etc' is the place for all local
6144 configuration files.
6146 * The C library header files now use `extern "C"' when used by the C++
6147 compiler, so the C library should now work with C++ code.
6149 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
6150 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
6153 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
6154 function which uses the `merge sort' algorithm, and is said to be
6155 significantly faster than the old GNU `qsort' function. Merge sort is
6156 now the standard `qsort' function. The new algorithm can require a lot
6157 of temporary storage; so, the old sorting function is called when the
6158 required storage is not available.
6160 * The C library now includes Michael Glad's Ultra Fast Crypt, which
6161 provides the Unix `crypt' function, plus some other entry points.
6163 * The code and header files taken from 4.4 BSD have been updated with the
6164 latest files released from Berkeley.
6166 ----------------------------------------------------------------------
6167 Copyright information:
6169 Copyright (C) 1992-2020 Free Software Foundation, Inc.
6171 Permission is granted to anyone to make or distribute verbatim copies
6172 of this document as received, in any medium, provided that the
6173 copyright notice and this permission notice are preserved,
6174 thus giving the recipient permission to redistribute in turn.
6176 Permission is granted to distribute modified versions
6177 of this document, or of portions of it,
6178 under the above conditions, provided also that they
6179 carry prominent notices stating who last changed them.
6182 version-control: never