1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2021 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ. When _SC_SIGSTKSZ_SOURCE or
13 _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer
14 constant on Linux. MINSIGSTKSZ is redefined to sysconf(_SC_MINSIGSTKSZ)
15 and SIGSTKSZ is redefined to sysconf (_SC_SIGSTKSZ).
17 * The dynamic linker implements the --list-diagnostics option, printing
18 a dump of information related to IFUNC resolver operation and
19 glibc-hwcaps subdirectory selection.
21 * On Linux, the function execveat has been added. It operates similar to
22 execve and it is is already used to implement fexecve without requiring
23 /proc to be mounted. However, different than fexecve, if the syscall is not
24 supported by the kernel an error is returned instead of trying a fallback.
26 * The ISO C2X function timespec_getres has been added.
28 Deprecated and removed features, and other changes affecting compatibility:
30 * The function pthread_mutex_consistent_np has been deprecated; programs
31 should use the equivalent standard function pthread_mutex_consistent
34 * The function pthread_mutexattr_getrobust_np has been deprecated;
35 programs should use the equivalent standard function
36 pthread_mutexattr_getrobust instead.
38 * The function pthread_mutexattr_setrobust_np has been deprecated;
39 programs should use the equivalent standard function
40 pthread_mutexattr_setrobust instead.
42 * The function pthread_yield has been deprecated; programs should use
43 the equivalent standard function sched_yield instead.
45 Changes to build and runtime requirements:
47 * On Linux, the shm_open, sem_open, and related functions now expect the
48 file shared memory file system to be mounted at /dev/shm. These functions
49 no longer search among the system's mount points for a suitable
50 replacement if /dev/shm is not available.
52 Security related changes:
54 CVE-2021-27645: The nameserver caching daemon (nscd), when processing
55 a request for netgroup lookup, may crash due to a double-free,
56 potentially resulting in degraded service or Denial of Service on the
57 local system. Reported by Chris Schanzle.
59 The following bugs are resolved with this release:
61 [The release manager will add the list generated by
62 scripts/list-fixed-bugs.py just before the release.]
69 * The dynamic linker accepts the --list-tunables argument which prints
70 all the supported tunables. This option is disable if glibc is
71 configured with tunables disabled (--enable-tunables=no).
73 * The dynamic linker accepts the --argv0 argument and provides opportunity
74 to change argv[0] string.
76 * The dynamic linker loads optimized implementations of shared objects
77 from subdirectories under the glibc-hwcaps directory on the library
78 search path if the system's capabilities meet the requirements for
79 that subdirectory. Initially supported subdirectories include
80 "power9" and "power10" for the powerpc64le-linux-gnu architecture,
81 "z13", "z14", "z15" for s390x-linux-gnu, and "x86-64-v2", "x86-64-v3",
82 "x86-64-v4" for x86_64-linux-gnu. In the x86_64-linux-gnu case, the
83 subdirectory names correspond to the vendor-independent x86-64
84 microarchitecture levels defined in the x86-64 psABI supplement.
86 * The new --help option of the dynamic linker provides usage and
87 information and library search path diagnostics.
89 * The mallinfo2 function is added to report statistics as per mallinfo,
90 but with larger field widths to accurately report values that are
91 larger than fit in an integer.
93 * Add <sys/platform/x86.h> to provide query macros for x86 CPU features.
95 * Support for the RISC-V ISA running on Linux has been expanded to run on
96 32-bit hardware. This is supported for the following ISA and ABI pairs:
102 The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils
105 * A new fortification level _FORTIFY_SOURCE=3 is available. At this level,
106 glibc may use additional checks that may have an additional performance
107 overhead. At present these checks are available only on LLVM 9 and later.
108 The latest GCC available at this time (10.2) does not support this level of
111 Deprecated and removed features, and other changes affecting compatibility:
113 * The mallinfo function is marked deprecated. Callers should call
116 * When dlopen is used in statically linked programs, alternative library
117 implementations from HWCAP subdirectories are no longer loaded.
118 Instead, the default implementation is used.
120 * The deprecated <sys/vtimes.h> header and the function vtimes have been
121 removed. To support old binaries, the vtimes function continues to exist
122 as a compatibility symbol. Applications should use the getrlimit or
125 * Following a change in the tzdata 2018a release upstream, the zdump
126 program is now installed in the /usr/bin subdirectory. Previously,
127 the /usr/sbin subdirectory was used.
129 * On s390(x), the type float_t is now derived from the macro
130 __FLT_EVAL_METHOD__ that is defined by the compiler, instead of being
131 hardcoded to double. This does not affect the ABI of any libraries
132 that are part of the GNU C Library, but may affect the ABI of other
133 libraries that use this type in their interfaces. The new definition
134 improves consistency with compiler behavior in many scenarios.
136 * A future version of glibc will stop loading shared objects from the
137 "tls" subdirectories on the library search path, the subdirectory that
138 corresponds to the AT_PLATFORM system name, and also stop employing
139 the legacy AT_HWCAP search mechanism. Applications should switch to
140 the new glibc-hwcaps mechanism instead; if they do not do that, only
141 the baseline version (directly from the search path directory) will be
144 Changes to build and runtime requirements:
146 * On Linux, the system administrator needs to configure /dev/pts with
147 the intended access modes for pseudo-terminals. glibc no longer
148 attemps to adjust permissions of terminal devices. The previous glibc
149 defaults ("tty" group, user read/write and group write) already
150 corresponded to what most systems used, so that grantpt did not
151 perform any adjustments.
153 * On Linux, the posix_openpt and getpt functions no longer attempt to
154 use legacy (BSD) pseudo-terminals and assume that if /dev/ptmx exists
155 (and pseudo-terminals are supported), a devpts file system is mounted
156 on /dev/pts. Current systems already meet these requirements.
158 * s390x requires GCC 7.1 or newer. See gcc Bug 98269.
160 Security related changes:
162 CVE-2021-3326: An assertion failure during conversion from the
163 ISO-20220-JP-3 character set using the iconv function has been fixed.
164 This assertion was triggered by certain valid inputs in which the
165 converted output contains a combined sequence of two wide characters
166 crossing a buffer boundary. Reported by Tavis Ormandy.
168 CVE-2020-27618: An infinite loop has been fixed in the iconv program when
169 invoked with input containing redundant shift sequences in the IBM1364,
170 IBM1371, IBM1388, IBM1390, or IBM1399 character sets.
172 CVE-2020-29562: An assertion failure has been fixed in the iconv function
173 when invoked with UCS4 input containing an invalid character.
175 CVE-2019-25013: A buffer overflow has been fixed in the iconv function when
176 invoked with EUC-KR input containing invalid multibyte input sequences.
178 The following bugs are resolved with this release:
180 [10635] libc: realpath portability patches
181 [16124] dynamic-link: ld.so should allow to change argv[0]
182 [17924] malloc: 'free' should not set errno
183 [18683] libc: Linux faccessat implementation can incorrectly ignore
185 [22899] libc: Use 64-bit readdir() in generic POSIX getcwd()
186 [23091] hurd: missing waitid support
187 [23249] libc: Epyc and other current AMD CPUs do not select the
188 "haswell" platform subdirectory
189 [24080] dynamic-link: Definition of "haswell" platform is inconsistent
191 [24202] libc: m68k setjmp() saves incorrect 'a5' register in --enable-
193 [24941] libc: Make grantpt usable after multi-threaded fork in more
195 [24970] libc: realpath mishandles EOVERFLOW; stat not needed anyway
196 [24973] locale: iconv encounters segmentation fault when converting
197 0x00 0xfe in EUC-KR to UTF-8 (CVE-2019-25013)
198 [25399] string: undefined reference to `__warn_memset_zero_len' when
199 changing gnuc version
200 [25859] libc: glibc parser for /sys/devices/system/cpu/online is
202 [25938] dynamic-link: ld.so.cache should store meaning of hwcap mask
204 [25971] libc: s390 bits/hwcap.h out of sync with kernel
205 [26053] libc: unlockpt fails with ENOTTY for non-ptmx descriptors
206 [26100] libc: Race in syslog(3) with regards to tag printing.
207 [26124] libc: Export <cpu-features.h>
208 [26130] nscd: Inconsistent nscd cache during pruning
209 [26203] libc: GLRO(dl_x86_cpu_features) may not be intialized
210 [26224] locale: iconv hangs when converting some invalid inputs from
211 several IBM character sets (CVE-2020-27618)
212 [26341] libc: realpath cyclically call __alloca(path_max) to consume
214 [26343] manual: invalid documented return type for strerrorname_np(),
215 strerrordesc_np(), sigdescr_np(), sigabbrev_np()
216 [26376] libc: Namespace violation in stdio.h and sys/stat.h if build
218 [26383] locale: bind_textdomain_codeset doesn't accept //TRANSLIT
220 [26394] time: [2.33 Regression] FAIL: nptl/tst-join14
221 [26534] math: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on
223 [26552] dynamic-link: CPU_FEATURE_USABLE_P should be more conservative
224 [26553] libc: mtx_init allows type set to "mtx_recursive" only
225 [26555] string: strerrorname_np does not return the documented value
226 [26592] libc: pointer arithmetic overflows in realpath
227 [26600] network: Transaction ID collisions cause slow DNS lookups in
229 [26606] libc: [2.33 Regression] pselect is broken on x32
230 [26615] libc: powerpc: libc segfaults when LD_PRELOADed with libgcc
231 [26620] glob: fnmatch with collating symbols results in segmentation
233 [26625] libc: [2.33 Regression] CET is disabled
234 [26636] libc: 32-bit shmctl(IPC_INFO) crashes when shminfo struct is
235 at the end of a memory mapping
236 [26637] libc: semctl SEM_STAT_ANY fails to pass the buffer specified
237 by the caller to the kernel
238 [26639] libc: msgctl IPC_INFO and MSG_INFO return garbage
239 [26647] build: [-Werror=array-parameter=] due to different
240 declarations for __sigsetjmp
241 [26648] libc: mkstemp is likely to fail on systems with non-stricly-
243 [26649] stdio: printf should handle non-normal x86 long double numbers
244 gracefully (CVE-2020-29573)
245 [26686] build: -Warray-parameter instances building with GCC 11
246 [26687] build: -Warray-bounds instances building with GCC 11
247 [26690] stdio: Aliasing violation in __vfscanf_internal
248 [26691] nptl: Use a minimum guard size of 64 KiB on aarch64
249 [26726] build: GCC warning calling new_composite_name with an array of
251 [26736] libc: FAIL: misc/tst-sysvshm-linux
252 [26737] libc: Random FAIL: rt/tst-shm
253 [26791] libc: Missing O_CLOEXEC in sysconf.c
254 [26798] dynamic-link: aarch64: variant PCS symbols may be incorrectly
256 [26801] nptl: pthread_mutex_clocklock with CLOCK_MONOTONIC can fail on
258 [26818] string: aarch64: string tests may run ifunc variants that are
260 [26821] libc: Memory leak test failures on Fedora 33
261 [26824] libc: FAIL: elf/tst-cpu-features-supports with recent trunk:
262 FSGSBASE/LM/RDRAND check failure
263 [26833] time: adjtime() with delta == NULL segfaults on armv7 32bit
265 [26853] libc: aarch64: Missing unwind information in statically linked
267 [26923] locale: Assertion failure in iconv when converting invalid
268 UCS4 (CVE-2020-29562)
269 [26926] dynamic-link: aarch64: library dependencies are not bti
271 [26932] libc: sh: Multiple floating point functions defined as stubs
273 [26964] nptl: pthread_mutex_timedlock returning EAGAIN after futex is
275 [26988] dynamic-link: aarch64: BTI mprotect address is not page
277 [27002] build: libc_freeres_fn build failure with GCC 11
278 [27004] dynamic-link: ld.so is miscompiled by GCC 11
279 [27008] dynamic-link: ld.so.cache should have endianness markup
280 [27042] libc: [alpha] anonymous union in struct stat confuses
282 [27053] libc: Conformance regression in system(3) (and probably also
284 [27072] dynamic-link: static pie ifunc resolvers run before hwcap is
286 [27077] network: Do not reload /etc/nsswitch.conf from chroot
287 [27083] libc: Unsafe unbounded alloca in addmntent
288 [27104] dynamic-link: The COMMON_CPUID_INDEX_MAX handshake does not
290 [27130] string: "rep movsb" performance issue
291 [27150] libc: alpha: wait4() is unavailable in static linking
292 [27177] dynamic-link:
293 GLIBC_TUNABLES=glibc.cpu.x86_ibt=on:glibc.cpu.x86_shstk=on doesn't
295 [27222] dynamic-link: Incorrect sysdeps/x86/tst-cpu-features-cpuinfo.c
296 [27237] malloc: deadlock in malloc/tst-malloc-stats-cancellation
297 [27256] locale: Assertion failure in ISO-2022-JP-3 gconv module
298 related to combining characters (CVE-2021-3326)
305 * Unicode 13.0.0 Support: Character encoding, character type info, and
306 transliteration tables are all updated to Unicode 13.0.0, using
307 generator scripts contributed by Mike FABIAN (Red Hat).
309 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
311 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
312 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
313 Three ABIs are supported:
319 The arc* ABIs are little-endian while arceb is big-endian. All ABIs use
320 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
322 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
323 DT_DEPAUDIT dynamic section entries of the main executable.
325 * powerpc64le supports IEEE128 long double libm/libc redirects when
326 using -mabi=ieeelongdouble to compile C code on supported GCC
327 toolchains. It is recommended to use GCC 8 or newer when testing
330 * To help detect buffer overflows and other out-of-bounds accesses
331 several APIs have been annotated with GCC 'access' attribute. This
332 should help GCC 10 issue better warnings.
334 * On Linux, functions pthread_attr_setsigmask_np and
335 pthread_attr_getsigmask_np have been added. They allow applications
336 to specify the signal mask of a thread created with pthread_create.
338 * The GNU C Library now provides the header file <sys/single_threaded.h>
339 which declares the variable __libc_single_threaded. Applications are
340 encouraged to use this variable for single-thread optimizations,
341 instead of weak references to symbols historically defined in
344 * The functions sigabbrev_np and sigdescr_np have been added. The
345 sigabbrev_np function returns the abbreviated signal name (e.g. "HUP" for
346 SIGHUP) while sigdescr_np returns a string describing the signal number
347 (e.g "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
348 attempt to translate the return description, both functions return
349 NULL for an invalid signal number.
351 They should be used instead of sys_siglist or sys_sigabbrev and they
352 are both thread and async-signal safe. These functions are GNU extensions.
354 * The functions strerrorname_np and strerrordesc_np have been added. The
355 strerroname_np function returns error number name (e.g. "EINVAL" for EINVAL)
356 while strerrordesc_np returns a string describing the error number
357 (e.g "Invalid argument" for EINVAL). Different than strerror,
358 strerrordesc_np does not attempt to translate the return description, both
359 functions return NULL for an invalid error number.
361 They should be used instead of sys_errlist and sys_nerr, both are
362 thread and async-signal safe. These functions are GNU extensions.
364 * AArch64 now supports standard branch protection security hardening
365 in glibc when it is built with a GCC that is configured with
366 --enable-standard-branch-protection (or if -mbranch-protection=standard
367 flag is passed when building both GCC target libraries and glibc,
368 in either case a custom GCC is needed). This includes branch target
369 identification (BTI) and pointer authentication for return addresses
370 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
371 extensions respectively for the protection to be effective,
372 otherwise the used instructions are nops. User code can use PAC-RET
373 without libc support, but BTI requires a libc that is built with BTI
374 support, otherwise runtime objects linked into user code will not be
377 Deprecated and removed features, and other changes affecting compatibility:
379 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
380 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
381 RPC header files. Backward compatibility for old programs is kept
382 only for architectures and ABIs that have been added in or before
383 glibc 2.31. New programs need to use TI-RPC
384 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
385 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
387 * Remove configure option --enable-obsolete-nsl. libnsl is only built
388 as shared library for backward compatibility and the NSS modules "nis"
389 and "nisplus" are not built at all and libnsl's headers aren't
390 installed. This compatibility is kept only for architectures and ABIs
391 that have been added in or before version 2.28. Replacement
392 implementations based on TI-RPC, which additionally support IPv6, are
393 available from <https://github.com/thkukuk/>. This change does not
394 affect the "compat" NSS module, which does not depend on libnsl
395 since 2.27 and thus can be used without NIS.
397 * The deprecated <sys/sysctl.h> header and the sysctl function have been
398 removed. To support old binaries, the sysctl function continues to
399 exist as a compatibility symbol (on those architectures which had it),
400 but always fails with ENOSYS. This reflects the removal of the system
401 call from all architectures, starting with Linux 5.5.
403 * The sstk function is no longer available to newly linked binaries.
404 Its implementation always returned with a failure, and the function
405 was not declared in any header file.
407 * The legacy signal handling functions siginterrupt, sigpause, sighold,
408 sigrelse, sigignore and sigset, and the sigmask macro have been
409 deprecated. Applications should use the sigsuspend, sigprocmask and
410 sigaction functions instead.
412 * ldconfig now defaults to the new format for ld.so.cache. glibc has
413 already supported this format for almost 20 years.
415 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
416 are no longer available to newly linked binaries, and their declarations
417 have been removed from <string.h>. They are exported solely as
418 compatibility symbols to support old binaries. All programs should use
421 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
422 are no longer available to newly linked binaries, and their declarations
423 have been removed from <stdio.h>. They are exported solely as
424 compatibility symbols to support old binaries. All programs should use
425 strerror or strerror_r instead.
427 * Both strerror and strerror_l now share the same internal buffer in the
428 calling thread, meaning that the returned string pointer may be invalided
429 or contents might be overwritten on subsequent calls in the same thread or
430 if the thread is terminated. It makes strerror MT-safe.
432 * Using weak references to libpthread functions such as pthread_create
433 or pthread_key_create to detect the singled-threaded nature of a
434 program is an obsolescent feature. Future versions of glibc will
435 define pthread_create within libc.so.6 itself, so such checks will
436 always flag the program as multi-threaded. Applications should check
437 the __libc_single_threaded variable declared in
438 <sys/single_threaded.h> instead.
440 * The "files" NSS module no longer supports the "key" database (used for
441 secure RPC). The contents of the /etc/publickey file will be ignored,
442 regardless of the settings in /etc/nsswitch.conf. (This method of
443 storing RPC keys only supported the obsolete and insecure AUTH_DES
444 flavor of secure RPC.)
446 * The __morecore and __after_morecore_hook malloc hooks and the default
447 implementation __default_morecore have been deprecated. Applications
448 should use malloc interposition to change malloc behavior, and mmap to
449 allocate anonymous memory. A future version of glibc may require that
450 applications which use the malloc hooks must preload a special shared
451 object, to enable the hooks.
453 * The hesiod NSS module has been deprecated and will be removed in a
454 future version of glibc. System administrators are encouraged to
455 switch to other approaches for networked account databases, such as
458 Changes to build and runtime requirements:
460 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
461 long double redirects.
463 Security related changes:
465 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
466 invoked with the -c option and when processing invalid multi-byte input
467 sequences. Reported by Jan Engelhardt.
469 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
470 corruption when they were passed a pseudo-zero argument. Reported by Guido
471 Vranken / ForAllSecure Mayhem.
473 CVE-2020-1752: A use-after-free vulnerability in the glob function when
474 expanding ~user has been fixed.
476 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
477 memmove functions has been fixed. Discovered by Jason Royes and Samual
478 Dytrych of the Cisco Security Assessment and Penetration Team (See
481 The following bugs are resolved with this release:
483 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
484 [10441] manual: Backtraces code example lacks error checking
485 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
486 timer_sigev_thread dangerous
487 [14231] stdio: stdio-common tests memory requirements
488 [14578] libc: /proc-based emulation for lchmod, fchmodat
489 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
490 filtee has constructor
491 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
492 sequences (CVE-2016-10228)
493 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
494 character entities for infinity & pi
495 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
496 segfaults in applications
497 [20543] libc: Please move from .gnu.linkonce to comdat
498 [22489] network: gcc warns about implicit convertion in
499 ICMP6_FILTER_SETPASS with -Wsign-conversion
500 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
501 [23294] math: Complex _FloatN functions are redirected to the wrong
502 function with -mlong-double-64
503 [23296] libc: Data race in setting function descriptor during lazy
505 [23668] dynamic-link: ldconfig: Default to the new format for
507 [23819] hurd: hurd: Add C11 thread support
508 [23990] build: test-container error out on failure to exec child.
509 [23991] build: shell-container typo in run_command_array
510 [24638] manual: Error in example of parsing a template string
511 [24654] manual: Wrong declaration of wcschr in libc manual
512 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
514 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
515 dynamically loaded dsos
516 [25098] nptl: nptl: ctype classification functions are not AS-Safe
517 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
519 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
520 restore EAX, ECX and EDX
521 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
522 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
523 [25420] network: Race condition in resolv_conf.c can result in caching
524 stale configuration forever
525 [25487] math: sinl() stack corruption from crafted input
527 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
529 [25523] libc: MIPS/Linux inline syscall template is miscompiled
530 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
532 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
533 on 32 bit and old kernel
534 [25635] libc: arm: Wrong sysdep order selection for soft-fp
535 [25639] localedata: Some names of days and months wrongly spelt in
537 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
538 amount of sigset_t bytes
539 [25691] stdio: printf: memory leak when printing long multibyte
541 [25715] libc: system() returns wrong errors when posix_spawn fails
542 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
543 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
544 state for conversions that produce two Unicode code points
545 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
546 for linux x86_64 leads to livelock
547 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
548 test failures, invalid instruction in ld.so
549 [25790] glob: Typo in tst-fnmatch.input
550 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
552 [25819] localedata: Update locale data to Unicode 13.0.0
553 [25824] libc: Abnormal function of strnlen in aarch64
554 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
555 [25896] libc: Incorrect prctl
556 [25902] libc: Bad LOADARGS_N
557 [25905] dynamic-link: VSX registers are corrupted during PLT
558 resolution when glibc is built with --disable-multi-arch and --with-
560 [25933] string: Off by one error in __strncmp_avx2 when
561 length=VEC_SIZE*4 and strings are at page boundaries can cause a
563 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
564 exiting detached thread
565 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
567 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
569 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
570 [26073] math: getpayload() has wrong return value
571 [26076] dynamic-link: dlmopen crashes after failing to load
572 dependencies in audit mode
573 [26120] localedata: column width of of some Korean
574 JUNGSEONG/JONGSEONG characters wrong (should be 0)
575 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
576 [26133] libc: Incorrect need_arch_feature_F16C
577 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
579 [26149] libc: PKU is usable only if OSPKE is set
580 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
582 [26208] libc: Incorrect bit_cpu_CLFSH
583 [26210] network: Incorrect use of hidden symbols for global sunrpc
585 [26211] stdio: printf integer overflow calculating allocation size
586 [26214] stdio: printf_fp double free
587 [26215] stdio: printf_fp memory leak
588 [26232] time: FAIL: support/tst-timespec for 32-bit targets
589 [26258] nss: nss_compat should not read input files with mmap
590 [26332] string: Incorrect cache line size load causes memory
598 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
599 enable features from the draft ISO C2X standard. Only some features from
600 this draft standard are supported by the GNU C Library, and as the draft
601 is under active development, the set of features enabled by this macro is
602 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
603 by compiling with "gcc -std=gnu2x".
605 * The <math.h> functions that round their results to a narrower type now
606 have corresponding type-generic macros in <tgmath.h>, as defined in TS
607 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
608 Clarification Request 13 to TS 18661-3.
610 * The function pthread_clockjoin_np has been added, enabling join with a
611 terminated thread with a specific clock. It allows waiting against
612 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
614 * New locale added: mnw_MM (Mon language spoken in Myanmar).
616 * The DNS stub resolver will optionally send the AD (authenticated data) bit
617 in queries if the trust-ad option is set via the options directive in
618 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
619 mode, the AD bit, as provided by the name server, is available to
620 applications which call res_search and related functions. In the default
621 mode, the AD bit is not set in queries, and it is automatically cleared in
622 responses, indicating a lack of DNSSEC validation. (Therefore, the name
623 servers and the network path to them are treated as untrusted.)
625 Deprecated and removed features, and other changes affecting compatibility:
627 * The totalorder and totalordermag functions, and the corresponding
628 functions for other floating-point types, now take pointer arguments to
629 avoid signaling NaNs possibly being converted to quiet NaNs in argument
630 passing. This is in accordance with the resolution of Clarification
631 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
632 floating-point arguments directly will continue to work.
634 * The obsolete function stime is no longer available to newly linked
635 binaries, and its declaration has been removed from <time.h>.
636 Programs that set the system time should use clock_settime instead.
638 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
639 in a future version of glibc. In this release, the header still exists
640 but calling ftime will cause a compiler warning. All programs should use
641 gettimeofday or clock_gettime instead.
643 * The gettimeofday function no longer reports information about a
644 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
645 many years, as it cannot handle the full complexity of the world's
646 timezones, but hitherto we have supported it on a best-effort basis.
647 Changes required to support 64-bit time_t on 32-bit architectures have
648 made this no longer practical.
650 As of this release, callers of gettimeofday with a non-null 'tzp' argument
651 should expect to receive a 'struct timezone' whose tz_minuteswest and
652 tz_dsttime fields are zero. (For efficiency reasons, this does not always
653 happen on a few Linux-based ports. This will be corrected in a future
656 All callers should supply a null pointer for the 'tzp' argument to
657 gettimeofday. For accurate information about the time zone associated
658 with the current time, use the localtime function.
660 gettimeofday itself is obsolescent according to POSIX. We have no plans
661 to remove access to this function, but portable programs should consider
662 using clock_gettime instead.
664 * The settimeofday function can still be used to set a system-wide time
665 zone when the operating system supports it. This is because the Linux
666 kernel reused the API, on some architectures, to describe a system-wide
667 time-zone-like offset between the software clock maintained by the kernel,
668 and the "RTC" clock that keeps time when the system is shut down.
670 However, to reduce the odds of this offset being set by accident,
671 settimeofday can no longer be used to set the time and the offset
672 simultaneously. If both of its two arguments are non-null, the call
673 will fail (setting errno to EINVAL).
675 Callers attempting to set this offset should also be prepared for the call
676 to fail and set errno to ENOSYS; this already happens on the Hurd and on
677 some Linux architectures. The Linux kernel maintainers are discussing a
678 more principled replacement for the reused API. After a replacement
679 becomes available, we will change settimeofday to fail with ENOSYS on all
680 platforms when its 'tzp' argument is not a null pointer.
682 settimeofday itself is obsolescent according to POSIX. Programs that set
683 the system time should use clock_settime and/or the adjtime family of
684 functions instead. We may cease to make settimeofday available to newly
685 linked binaries after there is a replacement for Linux's time-zone-like
688 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
689 the optional CAS instruction is implemented (for instance, LEON processors
690 are still supported, but SuperSPARC processors are not).
692 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
695 * If a lazy binding failure happens during dlopen, during the execution of
696 an ELF constructor, the process is now terminated. Previously, the
697 dynamic loader would return NULL from dlopen, with the lazy binding error
698 captured in a dlerror message. In general, this is unsafe because
699 resetting the stack in an arbitrary function call is not possible.
701 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
702 executable stack unless explicitly configured at build time to require
703 minimum kernel version 4.8 or newer. This is because executing
704 floating-point branches on a non-executable stack on Linux kernels prior to
705 4.8 can lead to application crashes for some MIPS configurations. While
706 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
707 expected to enable non-executable stack by default with PT_GNU_STACK by
708 default and is thus likely to trigger a crash on older kernels.
710 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
711 non-executable stack while dropping support for older kernels.
713 * System call wrappers for time system calls now use the new time64 system
714 calls when available. On 32-bit targets, these wrappers attempt to call
715 the new system calls first and fall back to the older 32-bit time system
716 calls if they are not present. This may cause issues in environments
717 that cannot handle unsupported system calls gracefully by returning
718 -ENOSYS. Seccomp sandboxes are affected by this issue.
720 Changes to build and runtime requirements:
722 * It is no longer necessary to have recent Linux kernel headers to build
723 working (non-stub) system call wrappers on all architectures except 64-bit
724 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
726 * The ChangeLog file is no longer present in the toplevel directory of the
727 source tree. ChangeLog files are located in the ChangeLog.old directory as
728 ChangeLog.N where the highest N has the latest entries.
730 Security related changes:
732 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
733 out-of-bounds write when executed in a signal frame context.
735 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
736 environment variable during program execution after a security
737 transition, allowing local attackers to restrict the possible mapping
738 addresses for loaded libraries and thus bypass ASLR for a setuid
739 program. Reported by Marcin Kościelnicki.
741 The following bugs are resolved with this release:
743 [12031] localedata: iconv -t ascii//translit with Greek characters
744 [15813] libc: Multiple issues in __gen_tempname
745 [17726] libc: [arm, sparc] profil_counter should be compat symbol
746 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
747 [19767] libc: vdso is not used with static linking
748 [19903] hurd: Shared mappings not being inherited by children processes
749 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
750 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
752 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
753 Symbols-A/B Unicode blocks
754 [23518] libc: Eliminate __libc_utmp_jump_table
755 [24026] malloc: malloc_info() returns wrong numbers
756 [24054] localedata: Many locales are missing date_fmt
757 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
758 [24304] dynamic-link: Lazy binding failure during ELF
759 constructors/destructors is not fatal
760 [24376] libc: RISC-V symbol size confusion with _start
761 [24682] localedata: zh_CN first weekday should be Monday per GB/T
763 [24824] libc: test-in-container does not install charmap files compatible
765 [24844] regex: regex bad pointer / leakage if malloc fails
766 [24867] malloc: Unintended malloc_info formatting changes
767 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
768 [24880] libc: login: utmp implementation uses struct flock with fcntl64
769 [24882] libc: login: pututline uses potentially outdated cache
770 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
771 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
773 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
775 [24930] dynamic-link: dlopen of PIE executable can result in
776 _dl_allocate_tls_init assertion failure
777 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
778 (stringop-overflow error)
779 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
780 functions other can lead to crashes
781 [24967] libc: jemalloc static linking causes runtime failure
782 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
784 [25035] libc: sbrk() failure handled poorly in tunables_strdup
785 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
786 [25097] libc: new -Warray-bounds with GCC 10
787 [25112] dynamic-link: dlopen must not make new objects accessible when it
788 still can fail with an error
789 [25139] localedata: Please add the new mnw_MM locale
790 [25149] regex: Array bounds violation in proceed_next_node
791 [25157] dynamic-link: Audit cookie for the dynamic loader is not
792 initialized correctly
793 [25189] libc: glibc's __glibc_has_include causes issues with clang
795 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
797 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
798 binaries (CVE-2019-19126)
799 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
801 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
803 [25232] string: <string.h> does not enable const correctness for strchr et
805 [25233] localedata: Consider "." as the thousands separator for sl_SI
807 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
808 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
809 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
811 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
812 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
814 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
815 (dl_initfirst) link map pointer
816 [25401] malloc: pvalloc must not have __attribute_alloc_size__
817 [25423] libc: Array overflow in backtrace on powerpc
818 [25425] network: Missing call to __resolv_context_put in
819 getaddrinfo.c:gethosts
826 * Unicode 12.1.0 Support: Character encoding, character type info, and
827 transliteration tables are all updated to Unicode 12.1.0, using
828 generator scripts contributed by Mike FABIAN (Red Hat).
830 * The dynamic linker accepts the --preload argument to preload shared
831 objects, in addition to the LD_PRELOAD environment variable.
833 * The twalk_r function has been added. It is similar to the existing
834 twalk function, but it passes an additional caller-supplied argument
835 to the callback function.
837 * On Linux, the getdents64, gettid, and tgkill functions have been added.
839 * Minguo (Republic of China) calendar support has been added as an
840 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
843 * The entry for the new Japanese era has been added for ja_JP locale.
845 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
846 pvalloc, memalign, and posix_memalign fail now with total object size
847 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
848 pointer subtraction within the allocated object, where results might
849 overflow the ptrdiff_t type.
851 * The dynamic linker no longer refuses to load objects which reference
852 versioned symbols whose implementation has moved to a different soname
853 since the object has been linked. The old error message, symbol
854 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
855 link time reference, is gone.
857 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
858 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
859 functions. These behave similarly to their "timed" equivalents, but also
860 accept a clockid_t parameter to determine which clock their timeout should
861 be measured against. All functions allow waiting against CLOCK_MONOTONIC
862 and CLOCK_REALTIME. The decision of which clock to be used is made at the
863 time of the wait (unlike with pthread_condattr_setclock, which requires
864 the clock choice at initialization time).
866 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
867 work, new resolvers can use a second argument which can be extended in
868 the future, currently it contains the AT_HWCAP2 value.
870 Deprecated and removed features, and other changes affecting compatibility:
872 * The copy_file_range function fails with ENOSYS if the kernel does not
873 support the system call of the same name. Previously, user space
874 emulation was performed, but its behavior did not match the kernel
875 behavior, which was deemed too confusing. Applications which use the
876 copy_file_range function can no longer rely on glibc to provide a fallback
877 on kernels that do not support the copy_file_range system call, and if
878 this function returns ENOSYS, they will need to use their own fallback.
879 Support for copy_file_range for most architectures was added in version
880 4.5 of the mainline Linux kernel.
882 * The functions clock_gettime, clock_getres, clock_settime,
883 clock_getcpuclockid, clock_nanosleep were removed from the librt library
884 for new applications (on architectures which had them). Instead, the
885 definitions in libc will be used automatically, which have been available
888 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
889 and <sys/stropts.h> have been removed.
891 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
892 resolver flag (deprecated in glibc 2.25) have been removed.
894 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
895 resolver have been removed from <resolv.h>.
897 * With --enable-bind-now, installed programs are now linked with the
900 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
901 configurations) has been removed, following the deprecation of this
902 subarchitecture in version 8 of GCC, and its removal in version 9.
904 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
905 header have been removed.
907 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
908 deprecated and will be removed from a future version of glibc.
909 Application should directly access /proc instead. For obtaining random
910 bits, the getentropy function can be used.
912 Changes to build and runtime requirements:
914 * GCC 6.2 or later is required to build the GNU C Library.
916 Older GCC versions and non-GNU compilers are still supported when
917 compiling programs that use the GNU C Library.
919 Security related changes:
921 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
922 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
923 has undefined behavior. On x32, the size_t argument may be passed
924 in the lower 32 bits of the 64-bit RDX register with non-zero upper
925 32 bits. When it happened with the sign bit of RDX register set,
926 memcmp gave the wrong result since it treated the size argument as
927 zero. Reported by H.J. Lu.
929 CVE-2019-9169: Attempted case-insensitive regular-expression match
930 via proceed_next_node in posix/regexec.c leads to heap-based buffer
931 over-read. Reported by Hongxu Chen.
933 The following bugs are resolved with this release:
935 [2872] locale: Transliteration Cyrillic -> ASCII fails
936 [6399] libc: gettid() should have a wrapper
937 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
938 [16976] glob: fnmatch unbounded stack VLA for collating symbols
939 [17396] localedata: globbing for locale by [[.collating-element.]]
940 [18035] dynamic-link: pldd does no longer work, enters infinite loop
941 [18465] malloc: memusagestat is built using system C library
942 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
943 invalid input drops valid char
944 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
945 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
946 [21897] localedata: Afar locales: Fix mon, abmon, and abday
947 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
948 [23352] malloc: __malloc_check_init still defined in public header
950 [23403] nptl: Wrong alignment of TLS variables
951 [23501] libc: nftw() doesn't return dangling symlink's inode
952 [23733] malloc: Check the count before calling tcache_get()
953 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
955 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
956 [23844] nptl: pthread_rwlock_trywrlock results in hang
957 [23983] argparse: Missing compat versions of argp_failure and argp_error
958 for long double = double
959 [23984] libc: Missing compat versions of err.h and error.h functions for
961 [23996] localedata: Dutch salutations
962 [24040] libc: riscv64: unterminated call chain in __thread_start
963 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
965 [24051] stdio: puts and putchar output to _IO_stdout instead of stdout
966 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
968 [24114] regex: regexec buffer read overrun in "grep -i
969 '\(\(\)*.\)*\(\)\(\)\1'"
970 [24122] libc: Segfaults if 0 returned from la_version
971 [24153] stdio: Some input functions do not react to stdin assignment
972 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
973 RDX is set) (CVE-2019-7309)
974 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
975 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
976 not the default "nor"
977 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
978 false positives, change to modern flexible array
979 [24180] nptl: pthread_mutex_trylock does not use the correct order of
980 instructions while maintaining the robust mutex list due to missing
982 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
983 unnecessary librt dependencies
984 [24200] localedata: Revert first_weekday removal in en_IE locale
985 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
986 [24215] nptl: pthread_timedjoin_np should be a cancellation point
987 [24216] malloc: Check for large bin list corruption when inserting
989 [24228] stdio: old x86 applications that use legacy libio crash on exit
990 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
992 [24293] localedata: Missing Minguo calendar support for TW locales
993 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
995 [24307] localedata: Update locale data to Unicode 12.0.0
996 [24323] dynamic-link: dlopen should not be able open PIE objects
997 [24335] build: "Obsolete types detected" with Linux 5.0 headers
998 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
1000 [24370] localedata: Add lang_name for tt_RU locale
1001 [24372] locale: Binary locale files are not architecture independent
1002 [24394] time: strptime %Ey mis-parses final year of era
1003 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
1005 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
1007 [24531] malloc: Malloc tunables give tcache assertion failures
1008 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
1010 [24535] localedata: Update locale data to Unicode 12.1.0
1011 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
1012 kernels and break testing
1013 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
1014 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
1015 [-Werror=format-overflow=]
1016 [24570] libc: alpha: compat msgctl uses __IPC_64
1017 [24584] locale: Data race in __wcsmbs_clone_conv
1018 [24588] stdio: Remove codecvt vtables from libio
1019 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
1021 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
1022 [24632] stdio: Old binaries which use freopen with default stdio handles
1024 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
1026 [24652] localedata: szl_PL spelling correction
1027 [24695] nss: nss_db: calling getpwent after endpwent crashes
1028 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
1029 in /etc/nsswitch.conf
1030 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
1031 [24740] libc: getdents64 type confusion
1032 [24741] dynamic-link: ld.so should not require that a versioned symbol is
1033 always implemented in the same library
1034 [24744] libc: Remove copy_file_range emulation
1035 [24757] malloc: memusagestat is linked against system libpthread
1036 [24794] libc: Partial test suite run builds corrupt test-in-container
1044 * The getcpu wrapper function has been added, which returns the currently
1045 used CPU and NUMA node. This function is Linux-specific.
1047 * A new convenience target has been added for distribution maintainers
1048 to build and install all locales as directories with files. The new
1049 target is run by issuing the following command in your build tree:
1050 'make localedata/install-locale-files', with an optional DESTDIR
1051 to set the install root if you wish to install into a non-default
1052 configured location.
1054 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
1056 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
1057 for _GNU_SOURCE, to match BSD environments.
1059 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
1060 indicates that it will abort the transaction prior to entering the kernel
1061 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
1062 suspended, and this caused some undefined side-effects issues by aborting
1063 transactions manually. Glibc avoided it by abort transactions manually on
1064 each syscall, but it lead to performance issues on newer kernels where the
1065 HTM state is saved and restore lazily (the state being saved even when the
1066 process actually does not use HTM).
1068 * The functions posix_spawn_file_actions_addchdir_np and
1069 posix_spawn_file_actions_addfchdir_np have been added, enabling
1070 posix_spawn and posix_spawnp to run the new process in a different
1071 directory. These functions are GNU extensions. The function
1072 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
1075 * The popen and system do not run atfork handlers anymore (BZ#17490).
1076 Although it is a possible POSIX violation, the POSIX rationale in
1077 pthread_atfork documentation regarding atfork handlers is to handle
1078 inconsistent mutex state after a fork call in a multi-threaded process.
1079 In both popen and system there is no direct access to user-defined mutexes.
1081 * Support for the C-SKY ABIV2 running on Linux has been added. This port
1082 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
1084 - C-SKY ABIV2 soft-float little-endian
1085 - C-SKY ABIV2 hard-float little-endian
1087 * strftime's default formatting of a locale's alternative year (%Ey)
1088 has been changed to zero-pad the year to a minimum of two digits,
1089 like "%y". This improves the display of Japanese era years during
1090 the first nine years of a new era, and is expected to be harmless
1091 for all other locales (only Japanese locales regularly have
1092 alternative year numbers less than 10). Zero-padding can be
1093 overridden with the '_' or '-' flags (which are GNU extensions).
1095 * As a GNU extension, the '_' and '-' flags can now be applied to
1096 "%EY" to control how the year number is formatted; they have the
1097 same effect that they would on "%Ey".
1099 Deprecated and removed features, and other changes affecting compatibility:
1101 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
1102 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
1104 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
1105 in <sys/procfs.h>, has been corrected to match the type actually used by
1106 the Linux kernel. This affects the size and layout of that structure on
1107 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
1109 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
1110 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
1111 defined in <sys/procfs.h>, has been corrected to match the type actually
1112 used by the Linux kernel. This affects the size and layout of those
1115 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
1116 meant to scan a string and allocate space for it with malloc, is now
1117 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
1118 defined. This extension conflicts with C99's use of '%a' to scan a
1119 hexadecimal floating-point number, which is now available to programs
1120 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
1122 POSIX.1-2008 includes the feature of allocating a buffer for string input
1123 with malloc, using the modifier letter 'm' instead. Programs using
1124 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
1125 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
1126 C99 '%a' no longer need to avoid _GNU_SOURCE.
1128 GCC's -Wformat warnings can detect most uses of this extension, as long
1129 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
1130 __attribute__ ((format (scanf, ...))).
1132 Changes to build and runtime requirements:
1134 * Python 3.4 or later is required to build the GNU C Library.
1136 * On most architectures, GCC 5 or later is required to build the GNU C
1137 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
1139 Older GCC versions and non-GNU compilers are still supported when
1140 compiling programs that use the GNU C Library.
1142 Security related changes:
1144 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
1145 denial of service due to resource exhaustion when processing getaddrinfo
1146 calls with crafted host names. Reported by Guido Vranken.
1148 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
1149 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
1150 happened, accessing the 32-bit size_t value as the full 64-bit register
1151 in the assembly string/memory functions would cause a buffer overflow.
1152 Reported by H.J. Lu.
1154 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
1155 addresses with arbitrary trailing characters, potentially leading to data
1156 or command injection issues in applications.
1158 The following bugs are resolved with this release:
1160 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
1161 [10496] localedata: 12h time representation in multiple locales faulty
1162 [10797] localedata: it_IT locale numeric does not have a separator for
1164 [11319] libc: dprintf doesn't handle errors properly
1165 [16346] time: mktime: potentially unsafe use of localtime_offset
1166 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
1168 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
1169 posix_spawn_file_actions_addfchdir_np
1170 [17426] localedata: Indian locales: set the correct date format
1171 [17490] stdio: popen should not invoke atfork handlers
1172 [17783] libc: TIOCSER_TEMT conditions inconsistent
1173 [18040] regex: use-after-free in regexec/get_subexp
1174 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
1175 [20018] network: getaddrinfo should reject IP addresses with trailing
1176 characters (CVE-2016-10739)
1177 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
1178 [20271] libc: Missing "\n" in __libc_fatal calls
1179 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
1180 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
1181 pointer argument is non-NULL
1182 [21037] stdio: open_memstream and freopen
1183 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
1184 [21716] time: Crash in glibc's mktime in low-memory situations
1185 [22834] stdio: Subprocess forked by popen may crash in Linux when
1186 multithreads call popen
1187 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
1188 and pthread_create fails.
1189 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
1190 [23125] libc: riscv64: endless loop when throwing an exception from a
1192 [23275] nptl: Race in pthread_mutex_lock while promoting to
1193 PTHREAD_MUTEX_ELISION_NP.
1194 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
1196 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
1198 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
1200 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
1201 [23509] dynamic-link: CET enabled glibc is incompatible with the older
1203 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
1204 [23521] nss: get_next_alias nss_files file stream leak
1205 [23538] nptl: Hang in pthread_cond_broadcast
1206 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
1207 [23578] regex: Invalid memory access if regex pattern contains NUL byte
1208 [23579] libc: Errors misreported in preadv2
1209 [23597] build: support/test-container.c doesn't work with different
1211 [23603] time: mktime signed integer overflow on large timestamps
1212 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
1213 [23614] libc: powerpc: missing CFI register information in __mpn_*
1215 [23637] string: Generic strstr/strcasestr fails with huge needles
1216 [23640] libc: no way to easily clear FD_CLOEXEC in
1217 posix_spawn_file_actions_adddup2()
1218 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
1220 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
1222 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
1223 [23689] libc: Bug in documentation for rusage.ru_ixrss in
1224 bits/types/struct_rusage.h
1225 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
1227 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
1229 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
1230 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
1231 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
1233 [23724] localedata: Albanian date formats are incorrect
1234 [23735] math: libnldbl_nonshared.a references internal libm symbols
1235 [23740] localedata: kl_GL: Month names and date formats need update
1236 [23744] regex: regex refactorings to remove BE, avoid duplication
1237 [23745] time: mktime fix for Gnulib + coreutils
1238 [23758] time: Improve the width of alternate representation for year in
1240 [23783] libc: [mips] Missing CMSPAR bits/termios.h
1241 [23789] time: mktime does not set errno on failure
1242 [23791] localedata: Wrong monetary format for ca_ES locale
1243 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
1244 [23794] locale: c16rtomb does not handle surrogate pairs
1245 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
1246 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
1247 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
1248 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
1249 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
1250 [23862] libc: [sh] missing kernel-features.h undefines
1251 [23864] libc: [riscv] missing kernel-features.h undefines
1252 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
1253 [23907] malloc: Incorrect double-free malloc tcache check disregards
1255 [23913] libc: off-by-one in function maybe_script_execute in
1256 sysdeps/posix/spawni.c
1257 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
1258 [23923] locale: Add --no-hard-links option to localedef
1259 [23927] network: Linux if_nametoindex() does not close descriptor
1261 [23961] math: powf can overflow to inf without setting errno in non-
1262 nearest rounding mode
1263 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
1264 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
1265 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
1266 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
1267 [24011] localedata: Fixed small type in comment for locale bs_BA
1268 [24018] libc: gettext() may return NULL
1269 [24022] build: riscv build failure with Linux kernel 4.20-rc7
1270 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
1271 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
1273 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
1274 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
1276 [24046] localedata: en_US locale doesn't define date_fmt
1277 [24063] manual: @var{errno} should be @code{errno}
1278 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
1279 [24088] libc: VSCR field is not being correctly read in ucontext_t on
1281 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
1283 [24097] string: Can't use 64-bit register for size_t in assembly codes for
1285 [24110] hurd: SS_DISABLE never set in stack_t value returned by
1287 [24112] network: Do not send DNS queries for non-host names (where all
1288 answers will be rejected)
1289 [24130] libc: alpha __remqu corrupts $f3 register
1296 * The localization data for ISO 14651 is updated to match the 2016
1297 Edition 4 release of the standard, this matches data provided by
1298 Unicode 9.0.0. This update introduces significant improvements to the
1299 collation of Unicode characters. This release deviates slightly from
1300 the standard in that the collation element ordering for lowercase and
1301 uppercase LATIN script characters is adjusted to ensure that regular
1302 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
1303 is not matched by [a-z]. With the update many locales have been
1304 updated to take advantage of the new collation information. The new
1305 collation information has increased the size of the compiled locale
1306 archive or binary locales.
1308 * The GNU C Library can now be compiled with support for Intel CET, AKA
1309 Intel Control-flow Enforcement Technology. When the library is built
1310 with --enable-cet, the resulting glibc is protected with indirect
1311 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
1312 compatible with all existing executables and shared libraries. This
1313 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
1314 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
1315 capable of multi-byte NOPs, like x86-64 processors as well as Intel
1316 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
1317 x86_64 and x32 on non-CET processors. --enable-cet has been tested
1318 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
1321 * The GNU C Library now has correct support for ABSOLUTE symbols
1322 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
1323 relocated incorrectly or in some cases discarded. The GNU linker can
1324 make use of the newer semantics, but it must communicate it to the
1325 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
1326 field) to indicate such support is required.
1328 * Unicode 11.0.0 Support: Character encoding, character type info, and
1329 transliteration tables are all updated to Unicode 11.0.0, using
1330 generator scripts contributed by Mike FABIAN (Red Hat).
1332 * <math.h> functions that round their results to a narrower type are added
1333 from TS 18661-1:2014 and TS 18661-3:2015:
1335 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
1336 fMxaddfNx functions.
1338 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
1339 fMxsubfNx functions.
1341 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
1342 fMxmulfNx functions.
1344 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
1345 fMxdivfNx functions.
1347 * Two grammatical forms of month names are now supported for the following
1348 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
1349 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
1350 support two grammatical forms in abbreviated month names: Catalan, Greek,
1353 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
1354 include the support for two grammatical forms of month names.
1356 * Building and running on GNU/Hurd systems now works without out-of-tree
1359 * The renameat2 function has been added, a variant of the renameat function
1360 which has a flags argument. If the flags are zero, the renameat2 function
1361 acts like renameat. If the flag is not zero and there is no kernel
1362 support for renameat2, the function will fail with an errno value of
1363 EINVAL. This is different from the existing gnulib function renameatu,
1364 which performs a plain rename operation in case of a RENAME_NOREPLACE
1365 flags and a non-existing destination (and therefore has a race condition
1366 that can clobber the destination inadvertently).
1368 * The statx function has been added, a variant of the fstatat64
1369 function with an additional flags argument. If there is no direct
1370 kernel support for statx, glibc provides basic stat support based on
1371 the fstatat64 function.
1373 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
1374 library if installed. libidn2 version 2.0.5 or later is recommended. If
1375 libidn2 is not available, internationalized domain names are not encoded
1376 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
1377 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
1378 with an encoding error.) Flags which used to change the IDN encoding and
1379 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
1380 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
1381 deprecated. They no longer have any effect.
1383 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
1384 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
1385 range of ELF gABI expressions including such constructs as
1386 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
1387 have been further restricted, and where in the past a dynamic string
1388 token sequence may have been interpreted as a literal string it will
1389 now cause a load failure. These load failures were always considered
1390 unspecified behaviour from the perspective of the dynamic loader, and
1391 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
1392 results in a load failure now.
1394 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
1395 implementation includes all the standard functions provided by
1398 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
1399 thrd_detach, thrd_exit, and thrd_join for thread management.
1401 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
1402 mtx_destroy for mutual exclusion.
1404 - call_once for function call synchronization.
1406 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
1407 cnd_wait for conditional variables.
1409 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
1411 Application developers must link against libpthread to use ISO C threads.
1413 Deprecated and removed features, and other changes affecting compatibility:
1415 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
1416 installed. Software that was using either header should be updated to
1417 use standard <stdio.h> interfaces instead.
1419 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
1420 This was never required by the C standard, and the macros just expanded
1421 to call alternative names for the same functions. If you hoped getc and
1422 putc would provide performance improvements over fgetc and fputc, instead
1423 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
1424 necessary, flockfile and funlockfile.
1426 * All stdio functions now treat end-of-file as a sticky condition. If you
1427 read from a file until EOF, and then the file is enlarged by another
1428 process, you must call clearerr or another function with the same effect
1429 (e.g. fseek, rewind) before you can read the additional data. This
1430 corrects a longstanding C99 conformance bug. It is most likely to affect
1431 programs that use stdio to read interactive input from a terminal.
1434 * The macros 'major', 'minor', and 'makedev' are now only available from
1435 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
1436 headers that happen to include <sys/types.h>. These macros are rarely
1437 used, not part of POSIX nor XSI, and their names frequently collide with
1438 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
1439 further explanation.
1441 <sys/sysmacros.h> is a GNU extension. Portable programs that require
1442 these macros should first include <sys/types.h>, and then include
1443 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
1445 * The tilegx*-*-linux-gnu configurations are no longer supported.
1447 * The obsolete function ustat is no longer available to newly linked
1448 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
1449 function has been deprecated in favor of fstatfs and statfs.
1451 * The obsolete function nfsservctl is no longer available to newly linked
1452 binaries. This function was specific to systems using the Linux kernel
1453 and could not usefully be used with the GNU C Library on systems with
1454 version 3.1 or later of the Linux kernel.
1456 * The obsolete function name llseek is no longer available to newly linked
1457 binaries. This function was specific to systems using the Linux kernel
1458 and was not declared in a header. Programs should use the lseek64 name
1459 for this function instead.
1461 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
1462 getaddrinfo and getnameinfo functions have been deprecated. The behavior
1463 previously selected by them is now always enabled.
1465 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
1466 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
1467 restriction (rejecting '_' in host names, among other things) has been
1468 removed, for increased compatibility with non-IDN name resolution.
1470 * The fcntl function now have a Long File Support variant named fcntl64. It
1471 is added to fix some Linux Open File Description (OFD) locks usage on non
1472 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
1473 fcntl and LFS support is handled transparently. Also for Linux, the OFD
1474 locks act as a cancellation entrypoint.
1476 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
1477 ecb_crypt, and des_setparity are no longer available to newly linked
1478 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
1479 longer installed. These functions encrypted and decrypted data with the
1480 DES block cipher, which is no longer considered secure. Software that
1481 still uses these functions should switch to a modern cryptography library,
1484 * Reflecting the removal of the encrypt and setkey functions above, the
1485 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
1486 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1489 * The obsolete function fcrypt is no longer available to newly linked
1490 binaries. It was just another name for the standard function crypt,
1491 and it has not appeared in any header file in many years.
1493 * We have tentative plans to hand off maintenance of the passphrase-hashing
1494 library, libcrypt, to a separate development project that will, we hope,
1495 keep up better with new passphrase-hashing algorithms. We will continue
1496 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1497 'crypt_r' should not need to change at all; however, distributions will
1498 need to install <crypt.h> and libcrypt from a separate project.
1500 In this release, if the configure option --disable-crypt is used, glibc
1501 will not install <crypt.h> or libcrypt, making room for the separate
1502 project's versions of these files. The plan is to make this the default
1503 behavior in a future release.
1505 Changes to build and runtime requirements:
1507 GNU make 4.0 or later is now required to build glibc.
1509 Security related changes:
1511 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1512 been fixed by removing the glibc-internal IDNA implementation and using
1513 the system-provided libidn2 library instead. Originally reported by Hanno
1514 Böck and Christian Weisgerber.
1516 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1517 architecture could corrupt memory. Reported by Max Horn.
1519 CVE-2018-11236: Very long pathname arguments to realpath function could
1520 result in an integer overflow and buffer overflow. Reported by Alexey
1523 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1524 architecture could write beyond the target buffer, resulting in a buffer
1525 overflow. Reported by Andreas Schwab.
1527 The following bugs are resolved with this release:
1529 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1530 [6889] manual: 'PWD' mentioned but not specified
1531 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1532 when __WORDSIZE != 64
1533 [13762] regex: re_search etc. should return -2 on memory exhaustion
1534 [13888] build: /tmp usage during testing
1535 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1536 [14092] nptl: Support C11 threads
1537 [14095] localedata: Review / update collation data from Unicode / ISO
1539 [14508] libc: -Wformat warnings
1540 [14553] libc: Namespace pollution loff_t in sys/types.h
1541 [14890] libc: Make NT_PRFPREG canonical.
1542 [15105] libc: Extra PLT references with -Os
1543 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1545 [16335] manual: Feature test macro documentation incomplete and out of
1547 [16552] libc: Unify umount implementations in terms of umount2
1548 [17082] libc: htons et al.: statement-expressions prevent use on global
1549 scope with -O1 and higher
1550 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1551 [17438] localedata: pt_BR: wrong d_fmt delimiter
1552 [17662] libc: please implement binding for the new renameat2 syscall
1553 [17721] libc: __restrict defined as /* Ignore */ even in c11
1554 [17979] libc: inconsistency between uchar.h and stdint.h
1555 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1556 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1557 horrible machine code)
1558 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1560 [18471] libc: llseek should be a compat symbol
1561 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1563 [18991] nss: nss_files skips large entry in database
1564 [19239] libc: Including stdlib.h ends up with macros major and minor being
1566 [19463] libc: linknamespace failures when compiled with -Os
1567 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1568 [19527] locale: Normalized charset name not recognized by setlocale
1569 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1570 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1572 [19728] network: out of bounds stack read in libidn function
1573 idna_to_ascii_4i (CVE-2016-6261)
1574 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1575 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1576 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1578 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1579 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1580 [20419] dynamic-link: files with large allocated notes crash in
1582 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1583 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1584 [20980] manual: CFLAGS environment variable replaces vital options
1585 [21163] regex: Assertion failure in pop_fail_stack when executing a
1586 malformed regexp (CVE-2015-8985)
1587 [21234] manual: use of CFLAGS makes glibc detect no optimization
1588 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1589 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1590 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1591 [21508] locale: intl/tst-gettext failure with latest msgfmt
1592 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1593 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1594 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1596 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1598 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1599 [22247] network: Integer overflow in the decode_digit function in
1600 puny_decode.c in libidn (CVE-2017-14062)
1601 [22342] nscd: NSCD not properly caching netgroup
1602 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1603 [22550] localedata: es_ES locale (and other es_* locales): collation
1604 should treat ñ as a primary different character, sync the collation
1605 for Spanish with CLDR
1606 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1607 by gcc configured with --enable-default-pie
1608 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1609 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1610 crossing 2GB threshold (CVE-2017-18269)
1611 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1613 [22735] time: Misleading typo in time.h source comment regarding
1615 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1616 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1617 `__assert_perror_fail ()' to `__assert_fail_base ()'
1618 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1620 [22786] libc: Stack buffer overflow in realpath() if input size is close
1621 to SSIZE_MAX (CVE-2018-11236)
1622 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1623 through an absolute DT_NEEDED path
1624 [22792] build: tcb-offsets.h dependency dropped
1625 [22797] libc: pkey_get() uses non-reserved name of argument
1626 [22807] libc: PTRACE_* constants missing for powerpc
1627 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1628 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1629 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1630 [22848] localedata: ca_ES: update date definitions from CLDR
1631 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1632 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1633 [22896] localedata: Update locale data for an_ES
1634 [22902] math: float128 test failures with GCC 8
1635 [22918] libc: multiple common of `__nss_shadow_database'
1636 [22919] libc: sparc32: backtrace yields infinite backtrace with
1638 [22926] libc: FTBFS on powerpcspe
1639 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1641 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1642 [22947] libc: FAIL: misc/tst-preadvwritev2
1643 [22963] localedata: cs_CZ: Add alternative month names
1644 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1645 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1646 [22998] dynamic-link: execstack tests are disabled when SELinux is
1648 [23005] network: Crash in __res_context_send after memory allocation
1650 [23007] math: strtod cannot handle -nan
1651 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1652 [23036] regex: regex equivalence class regression
1653 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1654 [23069] libc: sigaction broken on riscv64-linux-gnu
1655 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1656 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1657 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1658 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1659 and libc build with -Os)
1660 [23140] localedata: More languages need two forms of month names
1661 [23145] libc: _init/_fini aren't marked as hidden
1662 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1663 [23171] math: C++ iseqsig for long double converts arguments to double
1664 [23178] nscd: sudo will fail when it is run in concurrent with commands
1665 that changes /etc/passwd
1666 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1668 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1669 [23208] localedata: New locale - Lower Sorbian (dsb)
1670 [23233] regex: Memory leak in build_charclass_op function in file
1672 [23236] stdio: Harden function pointers in _IO_str_fields
1673 [23250] nptl: Offset of __private_ss differs from GCC
1674 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1675 -mtune=generic -mfpmath=sse
1676 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1678 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1679 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1681 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1682 [23277] math: nan function should not have const attribute
1683 [23279] math: scanf and strtod wrong for some hex floating-point
1684 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1686 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1687 [23303] build: undefined reference to symbol
1688 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1689 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1691 [23313] stdio: libio vtables validation and standard file object
1693 [23329] libc: The __libc_freeres infrastructure is not properly run across
1695 [23349] libc: Various glibc headers no longer compatible with
1697 [23351] malloc: Remove unused code related to heap dumps and malloc
1699 [23363] stdio: stdio-common/tst-printf.c has non-free license
1700 [23396] regex: Regex equivalence regression in single-byte locales
1701 [23422] localedata: oc_FR: More updates of locale data
1702 [23442] build: New warning with GCC 8
1703 [23448] libc: Out of bounds access in IBM-1390 converter
1704 [23456] libc: Wrong index_cpu_LZCNT
1705 [23458] build: tst-get-cpu-features-static isn't added to tests
1706 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1708 [23467] dynamic-link: x86/CET: A property note parser bug
1715 * The GNU C Library can now be compiled with support for building static
1716 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1717 executables are like static executables but can be loaded at any address
1718 and provide additional security hardening benefits at the cost of some
1719 memory and performance. When the library is built with --enable-static-pie
1720 the resulting libc.a is usable with GCC 8 and above to create static PIE
1721 executables using the GCC option '-static-pie'. This feature is currently
1722 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1723 aarch64 with binutils 2.30 or later.
1725 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1726 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1729 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1731 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1733 * In order to support faster and safer process termination the malloc API
1734 family of functions will no longer print a failure address and stack
1735 backtrace after detecting heap corruption. The goal is to minimize the
1736 amount of work done after corruption is detected and to avoid potential
1737 security issues in continued process execution. Reducing shutdown time
1738 leads to lower overall process restart latency, so there is benefit both
1739 from a security and performance perspective.
1741 * The abort function terminates the process immediately, without flushing
1742 stdio streams. Previous glibc versions used to flush streams, resulting
1743 in deadlocks and further data corruption. This change also affects
1744 process aborts as the result of assertion failures.
1746 * On platforms where long double has the IEEE binary128 format (aarch64,
1747 alpha, mips64, riscv, s390 and sparc), the math library now implements
1748 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1749 These are the same interfaces added in version 2.26 for some platforms where
1750 this format is supported but is not the format of long double.
1752 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1753 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1754 implements interfaces for that type, as defined by ISO/IEC TS
1755 18661-3:2015. These are corresponding interfaces to those supported for
1758 * The math library now implements interfaces for the _Float32, _Float64 and
1759 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1760 corresponding interfaces to those supported for _Float128.
1762 * glibc now implements the memfd_create and mlock2 functions on Linux.
1764 * Support for memory protection keys was added. The <sys/mman.h> header now
1765 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1768 * The copy_file_range function was added.
1770 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1772 * The ldconfig utility now processes `include' directives using the C/POSIX
1773 collation ordering. Previous glibc versions used locale-specific
1774 ordering, the change might break systems that relied on that.
1776 * Support for two grammatical forms of month names has been added.
1777 In a call to strftime, the "%B" and "%b" format specifiers will now
1778 produce the grammatical form required when the month is used as part
1779 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1780 required when the month is named by itself. For instance, in Greek
1781 and in many Slavic and Baltic languages, "%B" will produce the month
1782 in genitive case, and "%OB" will produce the month in nominative case.
1784 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1785 are all valid and will all accept any known form of month
1786 name---standalone or complete, abbreviated or full. In a call to
1787 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1788 the strings used by "%B" and "%b", respectively. New query
1789 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1790 used by "%OB" and "%Ob", respectively.
1792 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1793 define the strings for %OB and %Ob, respectively; these have the
1794 same syntax as "mon" and "abmon". These arrays are optional; if they
1795 are not provided then they have the same content as "mon" and "abmon",
1798 These features are provided for locales which define "alt_mon" and/or
1799 "ab_alt_mon" in their locale source data. This release includes such
1800 alternative month name data for the following languages: Belarusian,
1801 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1803 This feature is currently a GNU extension, but it is expected to
1804 be added to the next revision of POSIX, and it is also already
1805 available on some BSD-derived operating systems.
1807 This feature will cause existing statically compiled applications
1808 to fail to load locales and fall back to the builtin C/POSIX locales.
1809 See notes below for other changes affecting compatibility.
1811 * Support for the RISC-V ISA running on Linux has been added. This port
1812 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1813 for the following ISA and ABI pairs:
1819 Deprecated and removed features, and other changes affecting compatibility:
1821 * Statically compiled applications attempting to load locales compiled for the
1822 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1823 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1824 support for two grammatical forms of the month names, also extends the locale
1825 data binary format. Static applications needing locale support must be
1826 recompiled to match the runtime and data they are deployed with. In some
1827 distributions there is an upgrade window where dynamically linked applications
1828 may use a new library but the old locale data and also fall back to the
1829 builtin C/POSIX locales; restarting the application process is sufficient to
1832 * Support for statically linked applications which call dlopen is deprecated
1833 and will be removed in a future version of glibc. Applications which call
1834 dlopen need to be linked dynamically instead.
1836 * Support for old programs which use internal stdio data structures and
1837 functions is deprecated. This includes programs which use the C++ streams
1838 provided by libstdc++ in GCC 2.95. Programs which use the internal
1839 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1840 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1841 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1842 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1843 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1844 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1845 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1846 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1847 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1848 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1849 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1850 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1851 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1852 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1853 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1854 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1855 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1856 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1857 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1858 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1859 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1860 future version of glibc. Unlike other symbol removals, these old
1861 applications will not be supported using compatibility symbols.
1863 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1864 defined by <sys/ptrace.h>.
1866 * libm no longer supports SVID error handling (calling a user-provided
1867 matherr function on error) or the _LIB_VERSION variable to control error
1868 handling. (SVID error handling and the _LIB_VERSION variable still work
1869 for binaries linked against older versions of the GNU C Library.) The
1870 libieee.a library is no longer provided. math.h no longer defines struct
1871 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1872 TLOSS, PLOSS and HUGE.
1874 * The libm functions pow10, pow10f and pow10l are no longer supported for
1875 new programs. Programs should use the standard names exp10, exp10f and
1876 exp10l for these functions instead.
1878 * The mcontext_t type is no longer the same as struct sigcontext. On
1879 platforms where it was previously the same, this changes the C++ name
1880 mangling for interfaces involving this type.
1882 * The add-ons mechanism for building additional packages at the same time as
1883 glibc has been removed. The --enable-add-ons configure option is now
1886 * The --without-fp configure option is now ignored. Whether hardware
1887 floating-point instructions are used is now configured based on whether
1888 the compiler used at configure time (without any options implied by a
1889 --with-cpu= configure option) uses such instructions.
1891 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1892 the specified string can be parsed as a domain name.
1894 * In the malloc_info output, the <heap> element may contain another <aspace>
1895 element, "subheaps", which contains the number of sub-heaps.
1897 * The libresolv function p_secstodate is no longer supported for new
1900 * The tilepro-*-linux-gnu configuration is no longer supported.
1902 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1903 and will be removed in a future release. Software that is still using
1904 either header should be updated to use standard <stdio.h> interfaces
1907 libio.h was originally the header for a set of supported GNU extensions,
1908 but they have not been maintained as such in many years, they are now
1909 standing in the way of improvements to stdio, and we don't think there are
1910 any remaining external users. _G_config.h was never intended for public
1911 use, but predates the bits convention.
1913 Changes to build and runtime requirements:
1915 * bison version 2.7 or later is required to generate code in the 'intl'
1918 Security related changes:
1920 CVE-2009-5064: The ldd script would sometimes run the program under
1921 examination directly, without preventing code execution through the
1922 dynamic linker. (The glibc project disputes that this is a security
1923 vulnerability; only trusted binaries must be examined using the ldd
1926 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1927 suffered from a one-byte overflow during ~ operator processing (either
1928 on the stack or the heap, depending on the length of the user name).
1929 Reported by Tim Rühsen.
1931 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1932 would sometimes fail to free memory allocated during ~ operator
1933 processing, leading to a memory leak and, potentially, to a denial
1936 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1937 without GLOB_NOESCAPE, could write past the end of a buffer while
1938 unescaping user names. Reported by Tim Rühsen.
1940 CVE-2017-17426: The malloc function, when called with an object size near
1941 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1942 instead of NULL. This was a regression introduced with the new malloc
1943 thread cache in glibc 2.26. Reported by Iain Buclaw.
1945 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1946 to the allocation of too much memory. (This is not a security bug per se,
1947 it is mentioned here only because of the CVE assignment.) Reported by
1950 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1951 of the number of search path components. (This is not a security
1952 vulnerability per se because no trust boundary is crossed if the fix for
1953 CVE-2017-1000366 has been applied, but it is mentioned here only because
1954 of the CVE assignment.) Reported by Qualys.
1956 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1957 for AT_SECURE or SUID binaries could be used to load libraries from the
1960 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1961 succeeds without returning an absolute path due to unexpected behaviour
1962 of the Linux kernel getcwd syscall. Reported by halfdog.
1964 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1965 an object size near the value of SIZE_MAX, would return a pointer to a
1966 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1968 CVE-2018-6551: The malloc function, when called with an object size near
1969 the value of SIZE_MAX, would return a pointer to a buffer which is too
1970 small, instead of NULL.
1972 The following bugs are resolved with this release:
1974 [866] glob: glob should match dangling symlinks
1975 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1976 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1978 [5997] math: Very slow execution of sinf function
1979 [10580] localedata: hr_HR: updated locale
1980 [10871] locale: 'mon' array should contain both nominative and genitive
1982 [12349] localedata: eu_ES: incorrect thousands separator
1983 [13605] localedata: shn_MM: new Shan locale
1984 [13805] localedata: ru_RU: currency should use ',' as radix point
1985 [13953] localedata: km_KH: locale update
1986 [13994] localedata: mjw_IN: new locale
1987 [14121] build: make writes .mo files in po directory
1988 [14333] libc: Fix the race between atexit() and exit()
1989 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1990 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1992 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1993 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1994 width Latin characters
1995 [15332] localedata: es_CU: locale update
1996 [15436] stdio: Don't close or flush stdio streams on abort
1997 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1999 [16148] localedata: ca_ES: incorrect thousands separator
2000 [16750] dynamic-link: ldd should not try to execute the binaries
2002 [16777] localedata: pl_PL: incorrect thousands separator in locale
2003 [16905] localedata: hanzi: new collation
2004 [17563] localedata: cmn_TW: add hanzi collation
2005 [17750] localedata: wrong collation order of diacritics in most locales
2006 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
2008 [17956] build: Build fails on missing definitions from header file
2009 nss/nss.h when Mozilla NSS is used for cryptography
2010 [18203] libc: realpath() does not handle unreachable paths correctly
2011 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
2012 [18812] localedata: kab_DZ: new Kabyle Algeria locale
2013 [18822] libc: Internal functions are called via PLT
2014 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
2015 [19170] libc: __gmon_start__ defined in hppa in crtn.S
2016 [19574] libc: glibc should support building static PIE binaries
2017 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
2019 [19971] glob: glob: Do not skip entries with zero d_ino values
2020 [19982] localedata: fr.po: spelling mistake for error code EXDEV
2021 [20008] localedata: km_KH: convert to translit_neutral
2022 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
2023 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
2024 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
2025 [20482] localedata: de_CH: abbreviated weekdays should be two letters
2026 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
2028 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
2029 they're set, wrong errors returned by gaih_inet when lookup functions
2031 [20756] localedata: [PATCH] Use Unicode wise thousands separator
2032 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
2034 [20952] localedata: yuw_PG: new locale
2035 [21084] localedata: charmaps/IBM858: new codepage
2036 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
2037 [21242] libc: assert gives pedantic warning in old gcc versions
2038 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
2039 __regcall calling convention
2040 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
2041 [21326] libc: C99 functions are not declared for C++11 and later if
2042 _GNU_SOURCE is not predefined by g++
2043 [21457] libc: sys/ucontext.h namespace
2044 [21530] libc: tmpfile() should be implemented using O_TMPFILE
2045 [21660] math: GCC fails to compile a formula with tgmath.h
2046 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
2047 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
2048 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
2049 [21684] math: tgmath.h handling of complex integers
2050 [21685] math: tgmath.h handling of bit-fields
2051 [21686] math: tgmath.h handling of __int128
2052 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2054 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
2056 [21750] localedata: column width of characters incompatible with classical
2058 [21754] malloc: malloc: Perform as little work as possible after heap
2059 consistency check failures
2060 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
2061 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
2062 [21791] string: Unused XXX_chk_XXX functions in libc.a
2063 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
2065 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
2067 [21845] localedata: Added new Locale bho_NP
2068 [21853] localedata: Fix abday Which looks same as day in zh_SG
2069 [21854] localedata: Added New Locale en_SC
2070 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
2071 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
2072 _dl_runtime_resolve_avx_slow
2073 [21885] network: getaddrinfo: gethosts does not release resolver context
2074 on memory allocation failure
2075 [21899] libc: XPG4.2 sigaction namespace
2076 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
2078 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
2080 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
2081 errno value, causing getaddrinfo to fail
2082 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
2083 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
2084 instead of EAI_NODATA
2085 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
2086 constant PTRACE_SEIZE_DEVEL
2087 [21930] math: C-only gcc builtins used in <math.h> isinf
2088 [21932] network: Unpaired __resolv_context_get in generic get*_r
2090 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
2091 [21944] libc: sigval namespace
2092 [21951] localedata: Update hanzi collation by stroke
2093 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
2094 sysdeps/x86_64/fpu/e_expf.S
2095 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
2096 allocation in syscall loops)
2097 [21959] localedata: Fix Country name for xh_ZA
2098 [21960] localedata: Fix abmon for bem_ZM
2099 [21966] math: AVX2 mathvec functions use FMA without checking
2100 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
2101 [21971] localedata: Added New Locale for mfe_MU
2102 [21972] libc: assert macro requires operator== (int) for its argument type
2103 [21973] math: [sparc] libm missing sqrtl compat symbol
2104 [21974] libc: Remove __bb_init_func and __bb_exit_func
2105 [21982] string: stratcliff.c: error: assuming signed overflow does not
2107 [21986] stdio: __guess_grouping is called incorrectly
2108 [21987] math: [sparc32] wrong bits/long-double.h installed
2109 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
2111 [22022] localedata: Missing country_name for mni_IN
2112 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
2114 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
2116 [22026] locale: iconv_open: heap overflow on gconv_init failure
2117 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
2118 [22035] math: [m68k] bits/math-inline.h macro namespace
2119 [22038] localedata: Fix abbreviated weeks and months for Somali
2120 [22044] localedata: Remove redundant data for Limburgish Language
2121 [22050] malloc: Linking with -lmcheck does not hook
2122 __malloc_initialize_hook correctly
2123 [22051] libc: zero terminator in the middle of glibc's .eh_frame
2124 [22052] malloc: malloc failed to compile with GCC 7 and -O3
2125 [22070] localedata: charmaps/UTF-8: wcwidth for
2126 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
2127 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
2128 Jungseong and Jongseong) should be 0
2129 [22078] nss: nss_files performance issue in multi mode
2130 [22082] math: bits/math-finite.h exp10 condition
2131 [22086] libc: pcprofiledump incorrect cross-endian condition
2132 [22093] dynamic-link: ld.so no longer searches in .../x86_64
2133 [22095] network: Name server address allocation memory leak in resolv.conf
2135 [22096] network: __resolv_conf_attach can incorrectly free passed conf
2137 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
2138 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
2140 [22111] malloc: malloc: per thread cache is not returned when thread exits
2141 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
2142 [22134] libc: [linux] implement fexecve with execveat
2143 [22142] libc: [powerpc] printf outputs a wrong value of DBL_MAX on ppc64 and
2145 [22145] libc: ttyname() gives up too early in the face of namespaces
2146 [22146] math: C++ build issue with float128 on x86_64
2147 [22153] nptl: nptl: save error code before process termination
2148 [22156] libc: [hppa,ia64,microblaze] Executable stack default
2149 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
2150 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
2151 [22165] libc: [hppa] Text relocations in libc.so
2152 [22180] libc: destructor registered via __cxa_atexit is called twice
2153 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
2154 symlinks") cause "make" segfaults
2155 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
2157 [22207] libc: FAIL: stdlib/test-atexit-race
2158 [22225] math: nearbyint arithmetic moved before feholdexcept
2159 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
2160 [22235] math: iscanonical in C++ and float128
2161 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
2162 the svid compat wrapper
2163 [22244] math: ynf and yn are wrong without the svid compat wrapper
2164 [22273] libc: Improper assert in Linux posix_spawn implementation
2165 [22284] libc: -pg -pie doesn't work
2166 [22292] locale: localedef exits with error 4 when it should be error 1
2167 [22294] locale: Allow "" for int_currency_symbol definition in locales.
2168 [22295] locale: Don't warn on non-symbolic characters in locale sources in
2170 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
2171 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
2173 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
2174 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
2175 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
2176 [22322] libc: [mips64] wrong bits/long-double.h installed
2177 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
2178 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
2180 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
2181 [22343] malloc: Integer overflow in posix_memalign
2182 [22347] libc: getrandom() returns the number of bytes that were copied to
2183 the buffer even though the comments say "Return 0 on success and -1 on
2185 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
2186 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
2188 [22370] dynamic-link: Incorrect note padding check
2189 [22375] libc: malloc returns pointer from tcache_get when should return
2190 NULL (CVE-2017-17426)
2191 [22377] math: iseqsig, float128 and C++
2192 [22382] localedata: Error in tpi_PG locale
2193 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
2194 inside the ASCII printable range
2195 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
2197 [22403] localedata: Slash needs escaping in some locales
2198 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
2199 [22409] network: res_hnok does not accept some host names used on the
2201 [22412] network: res_dnok, res_hnok should perform syntax checks
2202 [22413] network: ns_name_pton ignores syntactically invalid trailing
2204 [22415] stdio: setvbuf can lead to invalid free/segfault
2205 [22432] build: Non-deterministic build
2206 [22439] malloc: malloc_info should compute summary statistics for all sub-
2208 [22442] network: if_nametoindex could report index for the wrong
2209 networking interface
2210 [22446] build: aliasing violation calling readlink in handle_request
2211 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
2212 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
2213 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
2214 __nscd_hash/__nss_hash
2215 [22463] network: p_secstodate overflow handling
2216 [22469] localedata: pl_PL LC_COLLATE does not use i18n
2217 [22478] libc: sigwait can fail with EINTR
2218 [22505] libc: ldconfig processes include directive in locale-specific
2220 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
2221 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
2222 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
2223 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
2224 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
2225 [22534] localedata: Collation rules for Serbian and Bosnian should be the
2226 same as for Croatian
2227 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
2228 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
2229 [22577] libc: missing newline after "cannot allocate TLS data structures
2231 [22588] manual: manual/conf.texi: missing underscore in front of
2233 [22593] math: nextafter and nexttoward are declared with const attribute
2234 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
2235 [22603] string: ia64 memchr overflows internal pointer check
2236 [22605] libc: SH clone does not set the exit code correctly
2237 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
2239 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
2240 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
2241 modified in case of success
2242 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
2243 [22615] manual: manual: ambiguous wording about errno value in case of
2245 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
2247 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
2248 binaries or if /proc is not mounted (CVE-2017-16997)
2249 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
2250 [22630] build: $(no-pie-ldflag) is no longer effective
2251 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
2252 [22635] nptl: pthread_self returns NULL before libpthread is loaded
2253 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
2254 [22637] nptl: guard size is subtracted from thread stack size instead of
2256 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
2257 [22657] localedata: hu_HU: Avoid double space in date
2258 [22660] math: fmax, fmin sNaN handling on alpha
2259 [22664] libc: New warning of GCC8
2260 [22665] math: alpha: ceil and floor raise inexact exceptions
2261 [22666] math: alpha: trunc raise inexact exceptions
2262 [22667] libc: makecontext lacks stack alignment on i386
2263 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
2264 [22679] libc: getcwd(3) can succeed without returning an absolute path
2266 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
2267 elision and tunables
2268 [22687] math: [powerpc-nofpu] complex long double functions spurious
2270 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
2271 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
2272 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
2274 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
2275 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
2277 [22701] nis: Incomplete removal of libnsl
2278 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
2279 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
2280 [22715] dynamic-link: FAIL: elf/tst-audit10
2281 [22719] libc: Backtrace tests fail on hppa
2282 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
2283 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
2284 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
2285 before the first call to crypt_r () in crypt/badsalttest.c
2292 * A per-thread cache has been added to malloc. Access to the cache requires
2293 no locks and therefore significantly accelerates the fast path to allocate
2294 and free small amounts of memory. Refilling an empty cache requires locking
2295 the underlying arena. Performance measurements show significant gains in a
2296 wide variety of user workloads. Workloads were captured using a special
2297 instrumented malloc and analyzed with a malloc simulator. Contributed by
2298 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
2300 * Unicode 10.0.0 Support: Character encoding, character type info, and
2301 transliteration tables are all updated to Unicode 10.0.0, using
2302 generator scripts contributed by Mike FABIAN (Red Hat).
2303 These updates cause user visible changes, especially the changes in
2304 wcwidth for many emoji characters cause problems when emoji sequences
2305 are rendered with pango, see for example:
2306 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
2308 * Collation of Hungarian has been overhauled and is now consistent with "The
2309 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
2312 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
2314 - The GNU C Library will now detect when /etc/resolv.conf has been
2315 modified and reload the changed configuration. The new resolver option
2316 “no-reload” (RES_NORELOAD) disables this behavior.
2318 - The GNU C Library now supports an arbitrary number of search domains
2319 (configured using the “search” directive in /etc/resolv.conf);
2320 previously, there was a hard limit of six domains. For backward
2321 compatibility, applications that directly modify the ‘_res’ global
2322 object are still limited to six search domains.
2324 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
2325 Library will now randomly pick a name server from the configuration as a
2326 starting point. (Previously, the second name server was always used.)
2328 * The tunables feature is now enabled by default. This allows users to tweak
2329 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
2331 * New function reallocarray, which resizes an allocated block (like realloc)
2332 to the product of two sizes, with a guaranteed clean failure upon integer
2333 overflow in the multiplication. Originally from OpenBSD, contributed by
2334 Dennis Wölfing and Rüdiger Sonderfeld.
2336 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
2337 These are extended versions of preadv and pwritev, respectively, taking an
2338 additional flags argument. The set of supported flags depends on the
2339 running kernel; full support currently requires kernel 4.7 or later.
2341 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
2342 create a new session ID for the spawned process. This feature is
2343 scheduled to be added to the next major revision of POSIX; for the time
2344 being, it is available under _GNU_SOURCE.
2346 * errno.h is now safe to use from C-preprocessed assembly language on all
2347 supported operating systems. In this context, it will only define the
2348 Exxxx constants, as preprocessor macros expanding to integer literals.
2350 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
2351 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
2352 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
2353 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
2355 To compile programs that use this feature, the compiler must support
2356 128-bit floating point with the type name _Float128 (as defined by TS
2357 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
2358 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
2359 must be defined to make the new interfaces visible.
2361 The new functions and macros correspond to those present for other
2362 floating-point types (except for a few obsolescent interfaces not
2363 supported for the new type), with F128 or f128 suffixes; for example,
2364 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
2365 printf or scanf formats for the new type; the strfromf128 and strtof128
2366 interfaces should be used instead.
2368 Deprecated and removed features, and other changes affecting compatibility:
2370 * The synchronization that pthread_spin_unlock performs has been changed to
2371 now be equivalent to a C11 atomic store with release memory order to the
2372 spin lock's memory location. Previously, several (but not all)
2373 architectures used stronger synchronization (e.g., containing what is
2374 often called a full barrier). This change can improve performance, but
2375 may affect odd fringe uses of spin locks that depend on the previous
2376 behavior (e.g., using spin locks as atomic variables to try to implement
2377 Dekker's mutual exclusion algorithm).
2379 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
2382 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
2383 will only be built and installed when the GNU C Library is configured with
2384 --enable-obsolete-rpc. This allows alternative RPC implementations, such
2385 as TIRPC or rpcsvc-proto, to be used.
2387 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
2388 libnss_compat, are deprecated, and will not be built or installed by
2391 The NIS(+) support library, libnsl, is also deprecated. By default, a
2392 compatibility shared library will be built and installed, but not headers
2393 or development libraries. Only a few NIS-related programs require this
2394 library. (In particular, the GNU C Library has never required programs
2395 that use 'gethostbyname' to be linked with libnsl.)
2397 Replacement implementations based on TIRPC, which additionally support
2398 IPv6, are available from <https://github.com/thkukuk/>. The configure
2399 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
2400 name service modules, to be built and installed.
2402 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
2403 support is enabled, the configured recursive resolver must support EDNS.
2404 (Responding to EDNS-enabled queries with responses which are not
2405 EDNS-enabled is fine, but FORMERR responses are not.)
2407 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
2408 servers have not supported this opcode for a long time.
2410 * The _res_opcodes variable has been removed from libresolv. It had been
2411 exported by accident.
2413 * <string.h> no longer includes inline versions of any string functions,
2414 as this kind of optimization is better done by the compiler. The macros
2415 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
2417 * The nonstandard header <xlocale.h> has been removed. Most programs should
2418 use <locale.h> instead. If you have a specific need for the definition of
2419 locale_t with no other declarations, please contact
2420 libc-alpha@sourceware.org and explain.
2422 * The obsolete header <sys/ultrasound.h> has been removed.
2424 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
2426 * The obsolete function cfree has been removed. Applications should use
2429 * The stack_t type no longer has the name struct sigaltstack. This changes
2430 the C++ name mangling for interfaces involving this type.
2432 * The ucontext_t type no longer has the name struct ucontext. This changes
2433 the C++ name mangling for interfaces involving this type.
2435 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
2436 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
2437 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
2438 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
2439 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
2440 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
2441 fpregset_t type no longer has the name struct fpu. This changes the C++
2442 name mangling for interfaces involving those types.
2444 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
2445 synced with the kernel:
2447 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
2448 are not supported on this architecture and have been removed.
2450 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
2451 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
2452 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
2454 Programs that assume the GET/SETREGS ptrace requests are universally
2455 available will now fail to build, instead of malfunctioning at runtime.
2457 Changes to build and runtime requirements:
2459 * Linux kernel 3.2 or later is required at runtime, on all architectures
2460 supported by that kernel. (This is a change from version 2.25 only for
2463 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
2465 * On most architectures, GCC 4.9 or later is required to build the GNU C
2466 Library. On powerpc64le, GCC 6.2 or later is required.
2468 Older GCC versions and non-GNU compilers are still supported when
2469 compiling programs that use the GNU C Library. (We do not know exactly
2470 how old, and some GNU extensions to C may be _de facto_ required. If you
2471 are interested in helping us make this statement less vague, please
2472 contact libc-alpha@sourceware.org.)
2474 Security related changes:
2476 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
2477 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
2479 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
2480 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
2482 * Avoid printing a backtrace from the __stack_chk_fail function since it is
2483 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
2486 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
2487 fixed (CVE-2017-12133).
2489 The following bugs are resolved with this release:
2491 [984] network: Respond to changed resolv.conf in gethostbyname
2492 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2493 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2495 [12189] libc: __stack_chk_fail should not attempt a backtrace
2497 [14096] time: Race condition on timezone/tst-timezone.out
2498 [14172] localedata: az_IR: new locale
2499 [14995] build: glibc fails to build if gold is the default linker, even if
2501 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2502 [16637] network: inet_pton function is accepting IPv6 with bad format
2503 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2504 x86 and other generic code
2505 [16875] localedata: ko_KR: fix lang_name
2506 [17225] localedata: ar_SY: localized month names for May and June are
2508 [17297] localedata: da_DK: wrong date_fmt string
2509 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2510 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2511 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2512 [19066] localedata: ar_SA abbreviated day and month names are in English
2513 [19569] network: resolv: Support an arbitrary number of search domains
2514 [19570] network: Implement random DNS server selection in the stub
2516 [19838] locale: localedef fails on PA-RISC
2517 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2518 order of 0D36 and 0D37
2519 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2521 [20098] libc: FAIL: debug/backtrace-tst on hppa
2522 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2524 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2526 [20313] localedata: Update locale data to Unicode 9.0
2527 [20424] manual: Document how to provide a malloc replacement
2528 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2530 [20686] locale: Add el_GR@euro to SUPPORTED.
2531 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2532 failures consistently
2533 [21015] dynamic-link: Document and fix --enable-bind-now
2534 [21016] nptl: pthread_cond support is broken on hppa
2535 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2536 frame-pointer on i386
2537 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2539 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2540 [21088] libc: Build fails with --enable-static-nss
2541 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2542 generic c code is used
2543 [21109] libc: Tunables broken on big-endian
2544 [21112] math: powf has large ulp errors with base close to 1 and exponent
2546 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2548 [21120] malloc: glibc malloc is incompatible with GCC 7
2549 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2551 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2552 (-0.0) when linking with -lieee
2553 [21171] math: log10, log2 and lgamma return incorrect results
2554 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2555 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2556 [21207] localedata: ce_RU: update weekdays from CLDR
2557 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2558 [21217] localedata: Update months from CLDR-31
2559 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2560 [21243] libc: support_delete_temp_file should issue warning for failed
2562 [21244] libc: support resolv_test_start() socket fd close should be
2564 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2565 new posix_spawn implementation
2566 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2567 leads to lower CPU frequency
2568 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2569 [21261] libc: [sparc64] bits/setjmp.h namespace
2570 [21267] network: [mips] bits/socket.h IOC* namespace
2571 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2572 [21270] libc: mmap64 silently truncates large offset values
2573 [21275] libc: posix_spawn always crashes on ia64 now
2574 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2575 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2576 [21289] libc: Incorrect declaration for 32-bit platforms with
2577 _FILE_OFFSET_BITS=64 causes build error
2578 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2579 not support gethostbyname4_r
2580 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2582 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2584 [21340] libc: Support POSIX_SPAWN_SETSID
2585 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2586 [21359] network: ns_name_pack needs additional byte in destination buffer
2587 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2588 against fragmentation attacks (CVE-2017-12132)
2589 [21369] network: resolv: Remove EDNS fallback
2590 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2592 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2593 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2594 [21393] stdio: Missing dup3 error check in freopen, freopen64
2595 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2596 [21399] localedata: Bad description for U00EC in
2597 localedata/charmaps/CP1254
2598 [21411] malloc: realloc documentation error
2599 [21426] network: sys/socket.h uio.h namespace
2600 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2601 [21445] libc: signal.h bsd_signal namespace
2602 [21455] network: Network headers stdint.h namespace
2603 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2605 [21475] network: resolv: Overlong search path is truncated mid-label
2606 [21511] libc: sigstack namespace
2607 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2608 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2609 bits/syscall.h: No such file or directory
2610 [21517] libc: struct sigaltstack namespace
2611 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2612 [21533] localedata: Update locale data to Unicode 10.0
2614 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2615 junk at end of line, first unrecognized character is `@'
2616 [21538] libc: SIG_HOLD missing for XPG4
2617 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2618 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2619 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2620 [21543] libc: sigevent namespace
2621 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2622 size for general purpose registers in mcontext_t structure
2623 [21550] libc: sigwait namespace
2624 [21552] libc: XPG4 bsd_signal namespace
2625 [21554] libc: sigpause namespace
2626 [21560] libc: sys/wait.h signal.h namespace
2627 [21561] libc: waitid namespace
2628 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2629 '/usr/include/stdlib.h': Permission denied
2630 [21575] libc: sys/wait.h missing struct rusage definition
2631 [21584] libc: sigaltstack etc namespace
2632 [21597] libc: siginterrupt namespace
2633 [21607] math: hppa: FAIL: math/test-tgmath
2634 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2636 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2637 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2638 stack and heap (CVE-2017-1000366)
2639 [21625] libc: wait3 namespace
2640 [21654] nss: Incorrect pointer alignment in NSS group merge result
2642 [21657] network: Parse interface zone id for node-local multicast
2643 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2645 [21666] libc: .symver is used on common symbol
2646 [21668] network: resolv: res_init cross-thread broadcast introduces race
2648 [21687] math: tgmath.h totalorder, totalordermag return type
2649 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2651 [21696] libc: Incorrect assumption of of __cpu_mask in
2652 posix/sched_cpucount.c
2653 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2654 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2656 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2657 leading to relocation crash
2658 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2659 `resolv_conf_matches (resp, conf)' failed.
2660 [21710] localedata: Added Samoan language locale for Samoa
2661 [21711] localedata: Pashto yesstr/nostr locale are missing
2662 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2663 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
2664 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2665 [21723] localedata: yesstr/nostr missing for Chinese language locale
2666 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2668 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2670 [21728] localedata: New Locale for Tongan language
2671 [21729] localedata: incorrect LC_NAME fields for hi_IN
2672 [21733] localedata: yesstr and nostr are missing for zh_HK
2673 [21734] localedata: Missing yesstr and nostr are for kw_GB
2674 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2675 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2676 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2677 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2679 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2681 [21749] localedata: Wrong abbreviated day name (“abday”) for
2683 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2684 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2685 [21759] localedata: missing yesstr and nostr for Tigrinya
2686 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2687 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2688 [21767] localedata: Missing Bislama locales
2689 [21768] localedata: Missing yesstr and nostr for aa_ET
2690 [21770] localedata: Missing Field in li_NL
2691 [21778] nptl: Robust mutex may deadlock
2692 [21779] libc: MicroBlaze segfaults when loading libpthread
2693 [21783] localedata: Fix int_select international_call_prefixes
2694 [21784] localedata: Inconsistency in country_isbn
2695 [21788] localedata: Missing Country Postal Abbreviations
2696 [21794] localedata: Added-country_isbn-for-Italy
2697 [21795] localedata: Add/Fix country_isbn for France
2698 [21796] localedata: Added country_isbn for Republic of Korea
2699 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2700 [21799] localedata: Added int_select international_call_prefixes
2701 [21801] localedata: Added int_select international_call_prefixes
2702 [21804] nptl: Double semicolon in thread-shared-types.h
2703 [21807] localedata: LC_ADDRESS fix for pap_CW
2704 [21808] localedata: Fix LC_ADDRESS for pap_AW
2705 [21821] localedata: Added country_name in mai_IN
2706 [21822] localedata: Fix LC_TIME for mai_IN
2707 [21823] localedata: missing yesstr, nostr for sa_IN
2708 [21825] localedata: Fix name_mrs for mag_IN
2709 [21828] localedata: 2.26 changelog should mention user visible changes
2711 [21835] localedata: Added Maithili language locale for Nepal
2712 [21838] localedata: Removed redundant data for the_NP
2713 [21839] localedata: Fix LC_MONETARY for ta_LK
2714 [21844] localedata: Fix Latin characters and Months Sequence.
2715 [21848] localedata: Fix mai_NP Title Name
2720 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2721 24731-2:2010, is supported to enable declarations of functions from that
2722 TR. Note that not all functions from that TR are supported by the GNU C
2725 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2726 18661-1:2014, is supported to enable declarations of functions and macros
2727 from that TS. Note that not all features from that TS are supported by
2730 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2731 18661-4:2015, is supported to enable declarations of functions and macros
2732 from that TS. Note that most features from that TS are not supported by
2735 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2736 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2737 Since the GNU C Library defaults to a much newer revision of POSIX, this
2738 will only affect programs that specifically request an old conformance
2739 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2740 see a change in the visible declarations, but a program compiled with
2741 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2744 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2745 defined by all multithreaded code, but glibc has not required this for
2748 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2749 means that in a future release, the macros “major”, “minor”, and “makedev”
2750 will only be available from <sys/sysmacros.h>.
2752 These macros are not part of POSIX nor XSI, and their names frequently
2753 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2754 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2755 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2758 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2759 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2760 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2762 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2763 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2764 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2765 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2766 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2767 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2768 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2769 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2770 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2771 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2772 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2775 * New <math.h> features are added from TS 18661-1:2014:
2777 - Signaling NaN macros: SNANF, SNAN, SNANL.
2779 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2780 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2781 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2783 - llogb functions: the llogb, llogbf and llogbl functions, and the
2784 FP_LLOGB0 and FP_LLOGBNAN macros.
2786 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2789 - Comparison macros: iseqsig.
2791 - Classification macros: iscanonical, issubnormal, iszero.
2793 - Total order functions: totalorder, totalorderf, totalorderl,
2794 totalordermag, totalordermagf, totalordermagl.
2796 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2798 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2799 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2801 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2802 are added to libc. They convert a floating-point number into string.
2804 * Most of glibc can now be built with the stack smashing protector enabled.
2805 It is recommended to build glibc with --enable-stack-protector=strong.
2806 Implemented by Nick Alcock (Oracle).
2808 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2809 intended to be used instead of memset() to erase sensitive data after use;
2810 the compiler will not optimize out calls to explicit_bzero even if they
2811 are "unnecessary" (in the sense that no _correct_ program can observe the
2812 effects of the memory clear).
2814 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2815 to float instead of double. This does not affect the ABI of any libraries
2816 that are part of the GNU C Library, but may affect the ABI of other
2817 libraries that use this type in their interfaces.
2819 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2820 float_t and double_t types are now defined to long double instead of float
2821 and double. These options are not the default, and this does not affect
2822 the ABI of any libraries that are part of the GNU C Library, but it may
2823 affect the ABI of other libraries that use this type in their interfaces,
2824 if they are compiled or used with those options.
2826 * The getentropy and getrandom functions, and the <sys/random.h> header file
2829 * The buffer size for byte-oriented stdio streams is now limited to 8192
2830 bytes by default. Previously, on Linux, the default buffer size on most
2831 file systems was 4096 bytes (and thus remains unchanged), except on
2832 network file systems, where the buffer size was unpredictable and could be
2833 as large as several megabytes.
2835 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2836 for the Linux quota interface which predates kernel version 2.4.22 has
2839 * The malloc_get_state and malloc_set_state functions have been removed.
2840 Already-existing binaries that dynamically link to these functions will
2841 get a hidden implementation in which malloc_get_state is a stub. As far
2842 as we know, these functions are used only by GNU Emacs and this change
2843 will not adversely affect already-built Emacs executables. Any undumped
2844 Emacs executables, which normally exist only during an Emacs build, should
2845 be rebuilt by re-running “./configure; make” in the Emacs build tree.
2847 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
2848 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2849 “no-ip6-dotint” had already been the default, and support for the
2850 “ip6-dotint” option was removed from the Internet in 2006.
2852 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2853 flag from <resolv.h> have been removed. The option relied on a
2854 backwards-incompatible DNS extension which was never deployed on the
2857 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2858 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2859 They were already unimplemented.
2861 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2862 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2863 removed again from the IETF name lookup interface specification in RFC
2864 2553. Applications should use getaddrinfo instead.
2866 * DNSSEC-related declarations and definitions have been removed from the
2867 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2868 decode the data part of DNSSEC record types. Previous versions of glibc
2869 only implemented minimal support for the previous version of DNSSEC, which
2870 is incompatible with the currently deployed version.
2872 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2873 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2874 <arpa/nameser.h> header file because the distinction between RR types and
2875 meta-RR types is not officially standardized, subject to revision, and
2876 thus not suitable for encoding in a macro.
2878 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2879 and rhook members of the res_state type in <resolv.h> have been removed.
2880 The glibc stub resolver did not support these hooks, but the header file
2881 did not reflect that.
2883 * For multi-arch support it is recommended to use a GCC which has
2884 been built with support for GNU indirect functions. This ensures
2885 that correct debugging information is generated for functions
2886 selected by IFUNC resolvers. This support can either be enabled by
2887 configuring GCC with '--enable-gnu-indirect-function', or by
2888 enabling it by default by setting 'default_gnu_indirect_function'
2889 variable for a particular architecture in the GCC source file
2892 * GDB pretty printers have been added for mutex and condition variable
2893 structures in POSIX Threads. When installed and loaded in gdb these pretty
2894 printers show various pthread variables in human-readable form when read
2895 using the 'print' or 'display' commands in gdb.
2897 * Tunables feature added to allow tweaking of the runtime for an application
2898 program. This feature can be enabled with the '--enable-tunables' configure
2899 flag. The GNU C Library manual has details on usage and README.tunables has
2900 instructions on adding new tunables to the library.
2902 * A new version of condition variables functions have been implemented in
2903 the NPTL implementation of POSIX Threads to provide stronger ordering
2906 * A new version of pthread_rwlock functions have been implemented to use a more
2907 scalable algorithm primarily through not using a critical section anymore to
2910 Security related changes:
2912 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2913 have been created with makecontext could fail to terminate due to a
2914 missing .cantunwind annotation. This has been observed to lead to a hang
2915 (denial of service) in some Go applications compiled with gccgo. Reported
2916 by Andreas Schwab. (CVE-2016-6323)
2918 * The DNS stub resolver functions would crash due to a NULL pointer
2919 dereference when processing a query with a valid DNS question type which
2920 was used internally in the implementation. The stub resolver now uses a
2921 question type which is outside the range of valid question type values.
2924 The following bugs are resolved with this release:
2926 [4099] stdio: Overly aggressive caching by stream i/o functions.
2927 [7065] build: Support building glibc with -fstack-protector or -fstack-
2929 [9842] localedata: en_CA: incorrect date format
2930 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2931 before it started waiting
2932 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2933 [15765] nptl: sem_open is wrongly a cancellation point
2934 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2935 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2937 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2938 library linked with pthread
2939 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2940 "FIXME: Ingo" issue)
2941 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2942 [17252] libc: getrandom and getentropy syscall
2943 [17730] malloc: thread-local storage is sometimes improperly free()'d
2944 after being __libc_memalign()'d
2945 [18241] stdio: failed fseek on memstream does not set errno and can fail
2947 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2949 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2950 PTHREAD_PRIO_INHERIT mutex on ARM
2951 [18784] network: res_query and related function crash for special record
2952 type queries (CVE-2015-5180)
2953 [19380] math: strtod does not raise "inexact"
2954 [19387] string: Integer overflow in memchr
2955 [19390] string: Integer overflow in strncat
2956 [19398] build: linknamespace tests fail with massively parallel build
2957 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2959 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2960 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2961 [19514] libc: [PATCH] Fix spelling errors in spelling
2962 "implement"/"implementation" in several places
2963 [19582] network: Deprecate RES_USE_INET6
2964 [19673] manual: clog10 docs appear to be erroneous
2965 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2966 causes a segmentation fault
2967 [19826] libc: invalid pointer returned from __tls_get_addr with static
2969 [20016] network: resolv: Remove hooks support from the API
2970 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2972 [20033] math: [x86_64] vectorized math function don't call the __finite
2974 [20116] nptl: use after free in pthread_create
2975 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2976 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2978 [20311] nptl: please install proc_service.h
2979 [20366] libc: Compilation errors in installed headers in strict-compliance
2981 [20370] malloc: malloc: Arena free list management is still racy
2982 (incorrect fix in bug 19243)
2983 [20386] libc: assert (X = 0) does not result in GCC warning
2984 [20432] malloc: malloc: Minimize interface required for interposition
2985 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2986 in _Unwind_Backtrace (CVE-2016-6323)
2987 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2988 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2990 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2991 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2992 [20477] network: resolv: incorrect double-checked locking related to
2994 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2996 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2998 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2999 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
3000 cause transition penalty
3001 [20517] math: sparcv9 missing fdiml compat symbol
3002 [20524] manual: strverscmp is inconsistent
3003 [20525] libc: <sys/quota.h> should be based on kernel headers
3004 [20539] math: GCC 7 -static -lm fails to link at -O3
3005 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
3007 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
3009 [20591] network: Remove obsolete DNSSEC support
3010 [20592] network: DNS resource record type classification macros in
3011 <arpa/nameser.h> are incorrect
3012 [20593] network: Update DNS RR type definitions
3013 [20611] network: getaddrinfo accepts invalid numeric scope IDs
3014 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
3016 [20629] network: libresolv: Remove support for bitstring labels
3018 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
3019 assertion: "maxidx >= 2"
3020 [20660] math: [arm] Use VSQRT
3021 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
3022 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
3023 [20689] libc: Test for FMA should also check for AVX.
3024 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
3025 [20715] math: iszero macro breaks existing code
3026 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
3027 [20728] libc: powerpc: Missing TOC stub in clone
3028 [20729] build: glibc-2.24 fails to build for i486 with -Os
3029 [20750] build: Build fails with default PIE enabled gcc-6.x
3030 [20768] math: [alpha] sqrt fegetenv namespace
3031 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
3033 [20787] math: float_t is defined as float incorrectly on x86_64 even if
3034 __FLT_EVAL_METHOD__ is 2
3035 [20790] network: rpcgen buffer overrun in get_prog_declaration
3036 [20822] nptl: race condition in __lll_unlock_elision on powerpc
3037 [20829] libc: crypt snprintf namespace
3038 [20847] libc: tst-vfork3 failure
3039 [20855] math: Default bits/mathdef.h has inappropriate float_t
3040 [20859] math: [sh4] FP_ILOGB0 invalid
3041 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
3042 U+20AC), not same as GBK
3043 [20915] dynamic-link: global-dynamic TLS broken on aarch64
3044 [20916] math: pow handling of sNaN arguments
3045 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
3046 [20919] math: Bad pow (qNaN, 0) result with -lieee
3047 [20940] math: hypot sNaN handling
3048 [20947] math: fmax, fmin sNaN handling
3049 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
3050 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
3052 [20971] string: powerpc64/power7 memchr overflows internal pointer check
3053 [20973] nptl: robust mutexes: Lost wake-ups
3054 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
3055 [20978] nis: strlen on null pointer in nss_nisplus
3056 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
3058 [21014] string: i686 memchr overflows internal pointer check
3059 [21019] libc: [mips] n32 lseek incorrect on overflow
3060 [21022] libc: [microblaze] __backtrace get_frame_size namespace
3061 [21026] libc: [MIPS] readahead syscall is broken on n64
3062 [21028] math: Fallback fesetexceptflag should always succeed
3063 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
3064 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
3066 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
3067 [21061] librt: [microblaze] librt lost clock_* exports
3068 [21073] libc: tunables: insecure environment variables passed to
3069 subprocesses with AT_SECURE
3070 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
3074 * The minimum Linux kernel version that this version of the GNU C Library
3075 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
3076 kernel version 2.6.32 or later suffices (on architectures that already
3077 required kernel versions more recent than 3.2, those requirements remain
3078 unchanged). Linux 3.2 or later kernel headers are required on all
3081 * The pap_AN locale has been deleted. This has been deprecated for a long
3082 time. It has been replaced by pap_AW & pap_CW, both of which have long
3083 been included in previous releases.
3085 * The readdir_r and readdir64_r functions have been deprecated. It is
3086 recommended to use readdir and readdir64 instead.
3088 * The type “union wait” has been removed. It was deprecated in the early
3089 1990s and never part of POSIX. Application code should use the int type
3090 instead of “union wait”.
3092 * A new NSS action is added to facilitate large distributed system
3093 administration. The action, MERGE, allows remote user stores like LDAP
3094 to be merged into local user stores like /etc/groups in order to provide
3095 easy to use, updated, and managed sets of merged credentials. The new
3096 action can be used by configuring it in /etc/nsswitch.conf:
3097 group: files [SUCCESS=merge] nis
3098 Implemented by Stephen Gallagher (Red Hat).
3100 * The deprecated __malloc_initialize_hook variable has been removed from the
3103 * The long unused localedef --old-style option has been removed. It hasn't
3104 done anything in over 16 years. Scripts using this option can safely
3107 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
3108 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
3109 return the next representable value in the direction of positive infinity
3110 and the nextdown functions return the next representable value in the
3111 direction of negative infinity. These are currently enabled as GNU
3114 Security related changes:
3116 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
3117 could result in a stack overflow when getnetbyname was called with an
3118 overly long name. (CVE-2016-3075)
3120 * Previously, getaddrinfo copied large amounts of address data to the stack,
3121 even after the fix for CVE-2013-4458 has been applied, potentially
3122 resulting in a stack overflow. getaddrinfo now uses a heap allocation
3123 instead. Reported by Michael Petlan. (CVE-2016-3706)
3125 * The glob function suffered from a stack-based buffer overflow when it was
3126 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
3127 Reported by Alexander Cherepanov. (CVE-2016-1234)
3129 * The Sun RPC UDP client could exhaust all available stack space when
3130 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
3131 alloca plugin for GCC. (CVE-2016-4429)
3133 * The IPv6 name server management code in libresolv could result in a memory
3134 leak for each thread which is created, performs a failing naming lookup,
3135 and exits. Over time, this could result in a denial of service due to
3136 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
3138 The following bugs are resolved with this release:
3140 [1170] localedata: ne_NP: update Nepali locale definition file
3141 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
3143 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
3144 [6796] math: fdim() does not set errno on overflow
3145 [10354] libc: posix_spawn should use vfork() in more cases than presently
3146 [11213] localedata: localedata: add copyright disclaimer to locale files
3147 [12143] localedata: chr_US: new Cherokee locale
3148 [12450] localedata: sgs_LT: new locale
3149 [12676] localedata: ln_CD: new locale
3150 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
3152 [13304] math: fma, fmaf, fmal produce wrong results
3153 [14259] build: --localedir arg to configure is ignored
3154 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
3155 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
3156 [14934] localedata: es_CL: wrong first weekday chilean locale
3157 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
3159 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
3161 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
3162 [15368] nptl: raise() is not async-signal-safe
3163 [15479] math: ceil, floor, round and trunc raise inexact exception
3164 [15578] localedata: kk_KZ: various updates
3165 [16003] localedata: pap_AN: punt old locale
3166 [16137] localedata: iw_IL: punt old locale
3167 [16190] localedata: eo: new esperanto locale
3168 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
3169 [16742] malloc: race condition: pthread_atfork() called before first
3170 malloc() results in unexpected locking behaviour/deadlocks
3171 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
3173 [16983] localedata: postal_fmt does not allow %l and %n modifiers
3174 [17565] localedata: pt_PT: wrong (work-)week start
3175 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
3176 [17950] build: Build fails with -msse
3177 [18205] localedata: be_BY*: wrong first_weekday and first_workday
3178 [18433] libc: posix_spawn does not return correctly upon failure to
3180 [18453] localedata: charmaps/IBM875: incorrect codes
3181 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
3183 [18896] localedata: he_IL: improvements for currency
3184 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
3185 Romanian locale data
3186 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
3188 [19056] libc: Deprecate readdir_r
3189 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
3191 [19198] localedata: nl_NL: small improvements for Dutch locales
3192 [19257] network: Per-thread memory leak in __res_vinit with IPv6
3193 nameservers (CVE-2016-5417)
3194 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
3196 [19400] locale: Language missing in "iso-639.def", trivial fix in
3198 [19431] malloc: Deadlock between fflush, getdelim, and fork
3199 [19505] libc: Incorrect file descriptor validity checks in
3200 posix_spawn_file_actions_add{open,close,dup2}
3201 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
3202 when using RTLD_NEXT
3203 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
3204 `intl/{gettextP,loadinfo}.h'
3205 [19534] libc: execle, execlp may use malloc
3206 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
3207 [19573] network: res_nclose and __res_maybe_init disagree about name
3208 server initialization, breaking Hesiod
3209 [19575] localedata: Status of GB18030 tables
3210 [19581] localedata: sr_* date_fmt string contains additional newline
3211 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
3213 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
3214 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
3215 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
3216 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
3218 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
3220 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
3222 [19610] dynamic-link: ldconfig -X removes stale symbolic links
3223 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
3224 [19633] locale: strfmon_l applies global locale to number formatting
3225 [19642] network: Memory leak in getnameinfo
3226 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
3227 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
3229 [19654] math: [x86_64] Need testcase for BZ #19590 fix
3230 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
3232 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
3233 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
3235 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
3237 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
3239 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
3240 pointers and lengths in error-case.
3241 [19727] locale: Converting from/to UTF-xx with iconv() does not always
3242 report errors on UTF-16 surrogates values.
3243 [19755] nscd: nscd assertion failure in gc
3244 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
3245 [19759] libc: mempcpy shouldn't be inlined
3246 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
3247 [19765] libc: s390 needs an optimized mempcpy
3248 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
3249 NAME_MAX limit assumption (CVE-2016-1234)
3250 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
3251 [19787] network: Missing and incorrect truncation checks in getnameinfo
3252 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
3254 [19791] network: Assertion failure in res_query.c with un-connectable name
3256 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
3257 [19822] math: libm.so install clobbers old version
3258 [19825] network: resolv: send_vc can return uninitialized data in second
3259 response to getaddrinfo
3260 [19830] network: nss_dns: should check RDATA length against buffer length
3261 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
3262 confronted with A/AAAA records of invalid size
3263 [19837] nss: nss_db: No retries for some long lines with a larger buffer
3264 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
3265 [19853] stdio: Printing IBM long double in decimal with high precision is
3267 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
3268 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
3269 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
3271 [19865] network: Assertion failure or memory leak in
3272 _nss_dns_getcanonname_r
3273 [19868] network: nss_dns: netent code does not skip over non-PTR records
3274 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
3276 [19881] string: Improve x86-64 memset
3277 [19907] string: Incorrect memcpy tests
3278 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
3280 [19925] libc: termios.h XCASE namespace
3281 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
3282 [19929] libc: limits.h NL_NMAX namespace
3283 [19931] stdio: Memory leak in vfprintf
3284 [19957] libc: clone(CLONE_VM) access invalid parent memory
3285 [19963] localedata: en_IL: New locale
3286 [19989] stdio: stdio.h cuserid namespace
3287 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
3289 [19996] locale: langinfo.h nl_langinfo_l namespace
3290 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
3291 [20010] network: getaddrinfo: Stack overflow in hostent translation
3293 [20012] stdio: libio: fmemopen append mode failure
3294 [20014] stdio: stdio.h namespace for pre-threads POSIX
3295 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
3296 [20023] libc: fcntl.h timespec namespace
3297 [20024] math: [x86_64] vectorized sincos trashes the stack
3298 [20031] network: nss_hesiod: Heap overflow in get_txt_records
3299 [20041] time: sys/time.h timespec namespace
3300 [20043] libc: unistd.h missing cuserid for UNIX98 and before
3301 [20044] libc: unistd.h missing pthread_atfork for UNIX98
3302 [20051] libc: ttyslot in wrong header under wrong conditions
3303 [20054] libc: gethostname not declared for XPG4
3304 [20055] libc: termios.h missing tcgetsid for XPG4
3305 [20072] dynamic-link: x86 init_cpu_features is called twice in static
3307 [20073] libc: sys/stat.h fchmod namespace
3308 [20074] libc: stdlib.h rand_r namespace
3309 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
3310 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
3312 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
3313 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
3315 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
3316 [20119] libc: Wrong mask for processors level type from CPUID
3317 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
3318 AS not supporting AVX512
3319 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
3321 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
3322 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
3324 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
3325 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
3326 [20178] libc: posix_spawn{p} should not call exit
3327 [20191] stdio: libio: vtables hardening
3328 [20195] string: FMA4 detection requires CPUID execution with register
3330 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
3331 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
3333 [20212] math: acos (sNaN) returns sNaN
3334 [20213] math: asin (sNaN) returns sNaN
3335 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
3336 [20218] math: [i386] asinhl (sNaN) returns sNaN
3337 [20219] math: [i386] atanhl (sNaN) returns sNaN
3338 [20222] stdio: fopencookie: Mangle function pointers
3339 [20224] math: [i386] cbrtl (sNaN) returns sNaN
3340 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
3341 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
3343 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
3344 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
3345 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
3346 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
3347 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
3348 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
3349 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
3350 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
3351 [20240] math: modf (sNaN) returns sNaN
3352 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
3353 [20250] math: frexp (sNaN) returns sNaN
3354 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
3355 [20255] math: [i386] fdim, fdimf return with excess range and precision /
3357 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
3358 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
3359 subscript is below array bounds [-Werror=array-bounds]
3360 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
3361 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
3363 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
3364 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
3366 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
3367 "invalid" exceptions
3368 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
3369 [20316] localedata: id_ID: Februari instead of Pebruari
3370 [20327] string: POWER8 strcasecmp returns incorrect result
3371 [20347] math: Failure: Test: j0_downward (0xap+0)
3372 [20348] libc: FAIL: misc/tst-preadvwritev64
3373 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
3374 [20350] libc: There is no test for p{read,write}64
3375 [20357] math: Incorrect cos result for 1.5174239687223976
3376 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
3380 * Unicode 8.0.0 Support: Character encoding, character type info, and
3381 transliteration tables are all updated to Unicode 8.0.0, using new
3382 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
3383 These updates cause user visible changes, such as the fixes for bugs
3384 89, 16061, and 18568.
3386 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
3387 kernel-internal CPU set size. This means that requests that change the
3388 CPU affinity which failed before (for example, an all-ones CPU mask) will
3389 now succeed. Applications that need to determine the effective CPU
3390 affinities need to call sched_getaffinity or pthread_getaffinity_np after
3391 setting it because the kernel can adjust it (and the previous size check
3392 would not detect this in the majority of cases).
3394 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
3395 the following new symbols are used: fts64_children, fts64_close,
3396 fts64_open, fts64_read and fts64_set.
3398 * getaddrinfo now detects certain invalid responses on an internal netlink
3399 socket. If such responses are received, an affected process will
3400 terminate with an error message of "Unexpected error <number> on netlink
3401 descriptor <number>" or "Unexpected netlink response of size <number> on
3402 descriptor <number>". The most likely cause for these errors is a
3403 multi-threaded application which erroneously closes and reuses the netlink
3404 file descriptor while it is used by getaddrinfo.
3406 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
3407 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
3408 unnecessary serialization of memory allocation requests across threads.
3409 The defect is now corrected. Users should see a substantial increase in
3410 the concurent throughput of allocation requests for applications which
3411 trigger this bug. Affected applications typically create and
3412 destroy threads frequently. (Bug 19048 was reported and analyzed by
3415 * There is now a --disable-timezone-tools configure option for disabling the
3416 building and installing of the timezone related utilities (zic, zdump, and
3417 tzselect). This is useful for people who build the timezone data and code
3418 independent of the GNU C Library.
3420 * The obsolete header <regexp.h> has been removed. Programs that require
3421 this header must be updated to use <regex.h> instead.
3423 * The obsolete functions bdflush, create_module, get_kernel_syms,
3424 query_module and uselib are no longer available to newly linked binaries;
3425 the header <sys/kdaemon.h> has been removed. These functions and header
3426 were specific to systems using the Linux kernel and could not usefully be
3427 used with the GNU C Library on systems with version 2.6 or later of the
3430 * Optimized string, wcsmbs and memory functions for IBM z13.
3431 Implemented by Stefan Liebler.
3433 * Newly linked programs that define a variable called signgam will no longer
3434 have it set by the lgamma, lgammaf and lgammal functions. Programs that
3435 require signgam to be set by those functions must ensure that they use the
3436 variable provided by the GNU C Library and declared in <math.h>, without
3437 defining their own copy.
3439 * The minimum GCC version that can be used to build this version of the GNU
3440 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
3441 still be used to compile programs using the GNU C Library.
3443 Security related changes:
3445 * An out-of-bounds value in a broken-out struct tm argument to strftime no
3446 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
3448 * The LD_POINTER_GUARD environment variable can no longer be used to disable
3449 the pointer guard feature. It is always enabled. Previously,
3450 LD_POINTER_GUARD could be used to disable security hardening in binaries
3451 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
3454 * An integer overflow in hcreate and hcreate_r could lead to an
3455 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
3457 * The catopen function no longer has unbounded stack usage. Reported by
3458 Max. (CVE-2015-8779)
3460 * The nan, nanf and nanl functions no longer have unbounded stack usage
3461 depending on the length of the string passed as an argument to the
3462 functions. Reported by Joseph Myers. (CVE-2014-9761)
3464 * A stack-based buffer overflow was found in libresolv when invoked from
3465 libnss_dns, allowing specially crafted DNS responses to seize control
3466 of execution flow in the DNS client. The buffer overflow occurs in
3467 the functions send_dg (send datagram) and send_vc (send TCP) for the
3468 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
3469 family. The use of AF_UNSPEC triggers the low-level resolver code to
3470 send out two parallel queries for A and AAAA. A mismanagement of the
3471 buffers used for those queries could result in the response of a query
3472 writing beyond the alloca allocated buffer created by
3473 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
3474 the overflow. Thanks to the Google Security Team and Red Hat for
3475 reporting the security impact of this issue, and Robert Holiday of
3476 Ciena for reporting the related bug 18665. (CVE-2015-7547)
3478 The following bugs are resolved with this release:
3480 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
3481 [887] math: Math library function "logb" and "nextafter" inconsistent
3482 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
3483 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
3484 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
3485 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
3487 [4404] localedata: German translation of "Alarm clock" is misleading
3488 [6799] math: nextafter() and nexttoward() doen't set errno on
3489 overflow/underflow errors
3490 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3492 [10432] nis: _nss_nis_setnetgrent assertion failure
3493 [11460] libc: fts has no LFS support
3494 [12926] network: getaddrinfo()/make_request() may spin forever
3495 [13065] nptl: Race condition in pthread barriers
3496 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3497 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3499 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3500 [14912] libc: Rename non-installed bits/*.h headers
3501 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3502 [15367] math: Let gcc use __builtin_isinf
3503 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3504 [15421] math: lgamma wrongly sets signgam for ISO C
3505 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3506 FE_INVALID with argument out of range
3507 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3509 [15786] dynamic-link: ifunc resolver functions can smash function
3511 [15918] math: Unnecessary check for equality in hypotf()
3512 [16061] localedata: Review / update transliteration data
3513 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3515 [16141] time: strptime %z offset restriction
3516 [16171] math: drem should be alias of remainder
3517 [16296] math: fegetround is pure?
3518 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3519 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3521 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3522 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3524 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3525 "Exception "Inexact" set" on ppc32
3526 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3527 [16517] math: Missing underflow exception from tanf/tan/tanl
3528 [16519] math: Missing underflow exception from sinhf
3529 [16520] math: Missing underflow exception from tanhf
3530 [16521] math: Missing underflow exception from exp2
3531 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3533 [16734] stdio: fopen calls mmap to allocate its buffer
3534 [16961] math: nan function incorrect handling of bad sequences
3535 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3536 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3537 [16985] locale: localedef: confusing error message when opening output
3539 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3540 [17197] locale: Redundant shift character in iconv conversion output at
3542 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3543 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3544 [17250] dynamic-link: static linking breaks nss loading
3545 (getaddrinfo/getpwnam/etc...)
3546 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3548 [17441] math: isnan() should use __builtin_isnan() in GCC
3549 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3550 (related to lock elision)
3551 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3552 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3553 [17887] time: strptime should be able to parse "+01:00" style timezones
3554 [17905] libc: catopen() Multiple unbounded stack allocations
3556 [18084] libc: backtrace (..., 0) dumps core on x86
3557 [18086] libc: nice() sets errno to 0 on success
3558 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3559 is too large (CVE-2015-8778)
3560 [18251] dynamic-link: SONAME missing when audit modules provides path
3561 [18265] libc: add attributes for wchar string and memory functions
3562 [18370] math: csqrt missing underflows
3563 [18421] libc: [hppa] read-only segment has dynamic relocations
3564 [18472] libc: Obsolete syscall wrappers should be compat symbols
3565 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3566 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3567 [18525] localedata: Remove locale timezone information
3568 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3569 [18568] localedata: Update locale data to Unicode 8.0
3570 [18589] locale: sort-test.sh fails at random
3571 [18595] math: ctan, ctanh missing underflows
3572 [18604] libc: assert macro-expands its argument
3573 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3574 contains a vector instruction exception.
3575 [18611] math: j1, jn missing errno setting on underflow
3576 [18618] localedata: sync Chechen locale definitions with other *_RU
3578 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3579 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3580 [18665] network: In send_dg, the recvfrom function is NOT always using the
3581 buffer size of a newly created buffer (CVE-2015-7547)
3582 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3584 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3586 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3587 [18699] math: tilegx cproj() for various complex infinities does not yield
3589 [18724] libc: Harden put*ent functions against data injection
3590 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3591 [18755] build: build errors with -DNDEBUG
3592 [18757] stdio: fmemopen fails to set errno on failure
3593 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3595 [18781] libc: openat64 lacks O_LARGEFILE
3596 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3597 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3598 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3599 [18790] math: [ldbl-128ibm] tanhl inaccurate
3600 [18795] libc: stpncpy fortification misses buffer lengths that are
3601 statically too large
3602 [18796] build: build fails for --disable-mathvec
3603 [18803] math: hypot missing underflows
3604 [18820] stdio: fmemopen may leak memory on failure
3605 [18823] math: csqrt spurious underflows
3606 [18824] math: fma spurious underflows
3607 [18825] math: pow missing underflows
3608 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3609 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3610 [18870] build: sem_open.c fails to compile with missing symbol
3612 [18872] stdio: Fix memory leak in printf_positional
3613 [18873] libc: posix_fallocate overflow check ineffective
3614 [18875] math: Excess precision leads incorrect libm
3615 [18877] libc: arm: mmap offset regression
3616 [18887] libc: memory corruption when using getmntent on blank lines
3617 [18918] localedata: hu_HU: change time to HH:MM:SS format
3618 [18921] libc: Regression: extraneous stat() and fstat() performed by
3620 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3621 binaries (CVE-2015-8777)
3622 [18951] math: tgamma missing underflows
3623 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3625 [18953] localedata: lt_LT: change currency symbol to the euro
3626 [18956] math: powf inaccuracy
3627 [18961] math: [i386] exp missing underflows
3628 [18966] math: [i386] exp10 missing underflows
3629 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3630 [18969] build: multiple string test failures due to missing locale
3632 [18970] libc: Reference of pthread_setcancelstate in libc.a
3633 [18977] math: float / long double Bessel functions not in XSI POSIX
3634 [18980] math: i386 libm functions return with excess range and precision
3635 [18981] math: i386 scalb*, ldexp return with excess range and precision
3636 [18982] stdio: va_list and vprintf
3637 [18985] time: Passing out of range data to strftime() causes a segfault
3639 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3640 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3641 [19012] locale: iconv_open leaks memory on error path
3642 [19016] math: clog, clog10 inaccuracy
3643 [19018] nptl: Mangle function pointers in tls_dtor_list
3644 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3645 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3646 [19048] malloc: malloc: arena free list can become cyclic, increasing
3648 [19049] math: [powerpc] erfc incorrect zero sign
3649 [19050] math: [powerpc] log* incorrect zero sign
3650 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3651 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3652 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3653 [19074] network: Data race in _res_hconf_reorder_addrs
3654 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3655 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3656 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3658 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3660 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3661 [19086] manual: posix_fallocate64 documented argument order is wrong.
3662 [19088] math: lround, llround missing exceptions close to overflow
3664 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3665 [19095] math: dbl-64 lrint incorrect for 64-bit long
3666 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3667 [19124] dynamic-link: ld.so failed to build with older assmebler
3668 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3669 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3670 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3671 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3672 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3673 pthread_setaffinity_np
3674 [19156] math: [ldbl-128] j0l spurious underflows
3675 [19164] nptl: tst-getcpu fails with many possible CPUs
3676 [19168] math: math/test-ildoubl and math/test-ldouble failure
3677 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3678 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3680 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3681 (FE_NOMASK_ENV) do not clear SSE exceptions
3682 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3683 _int_new_arena/reused_arena
3684 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3685 [19201] math: dbl-64 remainder incorrect sign of zero result
3686 [19205] math: bits/math-finite.h conditions do not match math.h and
3688 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3689 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3690 for C99-based standards
3691 [19212] libc: features.h not -Wundef clean
3692 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3694 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3695 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3696 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3698 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3699 "inexact" exceptions
3700 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3702 [19242] libc: strtol incorrect in Turkish locales
3703 [19243] malloc: reused_arena can pick an arena on the free list, leading
3704 to an assertion failure and reference count corruption
3705 [19253] time: tzset() ineffective when temporary TZ did not include DST
3707 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3708 [19270] math: [hppa] Shared libm missing __isnanl
3709 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3710 MAP_HUGETLB and MAP_STACK defines
3711 [19313] nptl: Wrong __cpu_mask for x32
3712 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3713 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3714 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3715 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3716 [19363] time: x32: times() return value wrongly truncates/sign extends
3718 [19367] dynamic-link: Improve branch prediction on Silvermont
3719 [19369] network: Default domain name not reset by res_ninit when "search"
3720 / "domain" entry is removed from resolv.conf
3721 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3723 [19385] localedata: bg_BG: time separator should be colon, not comma
3724 [19408] libc: linux personality syscall wrapper may erroneously return an
3725 error on 32-bit architectures
3726 [19415] libc: dladdr returns wrong names on hppa
3727 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3728 IBM905, IBM907, and IBM909
3729 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3730 [19443] build: build failures with -DDEBUG
3731 [19451] build: Make check fails on test-double-vlen2
3732 [19462] libc: Glibc failed to build with -Os
3733 [19465] math: Wrong code with -Os
3734 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3736 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3738 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3739 [19486] math: S390: Math tests fail with "Exception Inexact set".
3740 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3741 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3743 [19590] math: Fail to build shared objects that use libmvec.so functions.
3747 * The following bugs are resolved with this release:
3749 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3750 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3751 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3752 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3753 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3754 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3755 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3756 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3757 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3758 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3759 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3760 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3761 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3762 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3763 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3764 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3765 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3766 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3767 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3768 18657, 18676, 18694, 18696, 18887.
3770 * Cache information can be queried via sysconf() function on s390 e.g. with
3771 _SC_LEVEL1_ICACHE_SIZE as argument.
3773 * A buffer overflow in gethostbyname_r and related functions performing DNS
3774 requests has been fixed. If the NSS functions were called with a
3775 misaligned buffer, the buffer length change due to pointer alignment was
3776 not taken into account. This could result in application crashes or,
3777 potentially arbitrary code execution, using crafted, but syntactically
3778 valid DNS responses. (CVE-2015-1781)
3780 * The time zone file parser has been made more robust against crafted time
3781 zone files, avoiding heap buffer overflows related to the processing of
3782 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3783 large time zone data files. Overly long time zone specifiers in the TZ
3784 variable no longer result in stack overflows and crashes.
3786 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3787 for LD and GD on x86 and x86-64, has been implemented. You will need
3788 binutils-2.24 or later to enable this optimization.
3790 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3791 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3792 Hat). These updates cause user visible changes, such as the fix for bug
3795 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3796 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3797 condition in some applications.
3799 * Added vector math library named libmvec with the following vectorized x86_64
3800 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3802 The library can be disabled with --disable-mathvec. Use of the functions is
3803 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3804 Shared library libmvec.so is linked in as needed when using -lm (no need to
3805 specify -lmvec explicitly for not static builds).
3806 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3808 * A new fmemopen implementation has been added with the goal of POSIX
3809 compliance. The new implementation fixes the following long-standing
3810 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3811 old implementation is still present for use be by existing binaries.
3813 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3814 releases. It has been fixed to match 2.19 and older, but binaries built
3815 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3817 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3818 Contributed by Roland McGrath (Google).
3820 * The header <regexp.h> is deprecated, and will be removed in a future
3821 release. Use of this header will trigger a deprecation warning.
3822 Application developers should update their code to use <regex.h> instead.
3824 This header was formerly part of SUS, but was deprecated in 1994 and
3825 removed from the standard in 2001. Also, the glibc implementation
3826 leaks memory. See BZ#18681 for more details.
3830 * The following bugs are resolved with this release:
3832 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3833 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3834 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3835 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3836 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3837 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3838 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3839 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3840 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3841 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3844 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3845 too little memory for the to-be-scanned arguments and overflow the
3846 allocated buffer. The implementation now correctly computes the required
3847 buffer size when using malloc, and switches to malloc from alloca as
3850 * A new semaphore algorithm has been implemented in generic C code for all
3851 machines. Previous custom assembly implementations of semaphore were
3852 difficult to reason about or ensure that they were safe. The new version
3853 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3854 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3855 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3857 * Port to Altera Nios II has been contributed by Mentor Graphics.
3859 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3860 implementations for powerpc64/powerpc64le.
3861 Implemented by Adhemerval Zanella (IBM).
3863 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3864 and powerpc64le. This may improve lock scaling of existing programs on
3865 HTM capable systems. The lock elision code is only enabled with
3866 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3867 powerpc will issue a transaction abort on every syscall to avoid side
3868 effects being visible outside transactions.
3870 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3871 AArch64. Contributed by ARM Ltd.
3873 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3875 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3876 under certain input conditions resulting in the execution of a shell for
3877 command substitution when the application did not request it. The
3878 implementation now checks WRDE_NOCMD immediately before executing the
3879 shell and returns the error WRDE_CMDSUB as expected.
3881 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3882 processing format strings with a large number of format specifiers.
3884 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3885 infinite loop if the DNS response contained a PTR record of an unexpected
3888 * The minimum GCC version that can be used to build this version of the GNU
3889 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3890 still be used to compile programs using the GNU C Library.
3892 * The GNU C Library is now built with -Werror by default. This can be
3893 disabled by configuring with --disable-werror.
3895 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3897 * The obsolete sigvec function has been removed. This was the original
3898 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3899 programs have been using instead for about 25 years. Of course, ABI
3900 compatibility for old binaries using sigvec remains intact.
3902 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3903 with newer versions of bison.
3905 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3906 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3907 registers overlay two consecutive single-precision registers. MIPS32R2
3908 introduced a new FPU mode (FR=1) where double-precision registers extend the
3909 corresponding single-precision registers which is incompatible with the
3910 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3911 require the use of FR=1 making a transition necessary. New o32 ABI
3912 extensions enable users to migrate over time from the original o32 ABI
3913 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3914 tracks the ABI of any loaded object and verifies that new objects are
3915 compatible. Mode transitions will also be requested as required and
3916 unsupportable objects will be rejected. The ABI checks include both soft and
3917 hard float ABIs for o32, n32 and n64.
3919 GCC 5 with GNU binutils 2.25 onwards:
3920 It is strongly recommended that all o32 system libraries are built using the
3921 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3922 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3923 compiler using --with-fp-32=xx to set this by default.
3927 * The following bugs are resolved with this release:
3929 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3930 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3931 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3932 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3933 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3934 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3935 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3936 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3937 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3938 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3939 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3940 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3941 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3942 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3943 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3945 * Reverted change of ABI data structures for s390 and s390x:
3946 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3947 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3948 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3949 are preserved pointing straight to the same implementation as the old ones.
3950 Given that, new callers will simply provide a too-big buffer to these
3951 functions. Any applications/libraries out there that embed jmp_buf or
3952 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3953 against 2.19 headers will have to rebuilt again. This is necessary in any
3954 case to revert the breakage in their ABI caused by the glibc change.
3956 * Support for file description locks is added to systems running the
3957 Linux kernel. The standard file locking interfaces are extended to
3958 operate on file descriptions, not file descriptors, via the use of
3959 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3960 are associated with an open file instead of a process.
3962 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3964 * The minimum Linux kernel version that this version of the GNU C Library
3965 can be used with is 2.6.32.
3967 * Running the testsuite no longer terminates as soon as a test fails.
3968 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3969 with PASS or FAIL lines for individual tests. A summary of the results is
3970 printed, including a list of failing lists, and "make check" exits with
3971 error status if there were any unexpected failures. "make check
3972 stop-on-test-failure=y" may be used to keep the old behavior.
3974 * The am33 port, which had not worked for several years, has been removed
3977 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3978 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3979 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3980 conflicted with POSIX (support for which was removed in 2.19), the
3981 interfaces those macros enabled remain available when compiling with
3982 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3983 test macros defined.
3985 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3987 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3988 This may improve lock scaling of existing programs on TX capable systems.
3989 The lock elision code is only built with --enable-lock-elision=yes and
3990 then requires a GCC version supporting the TX builtins. With lock elision
3991 default mutexes are elided via __builtin_tbegin, if the cpu supports
3992 transactions. By default lock elision is not enabled and the elision code
3995 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3996 copy the path argument. This allowed programs to cause posix_spawn to
3997 deference a dangling pointer, or use an unexpected pathname argument if
3998 the string was modified after the posix_spawn_file_actions_addopen
4001 * All supported architectures now use the main glibc sysdeps directory
4002 instead of some being in a separate "ports" directory (which was
4003 distributed separately before glibc 2.17).
4005 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
4006 On configurations that support it (all Linux configurations), it's now
4007 used regardless of the --enable-add-ons switch to configure. It is no
4008 longer possible to build such configurations without pthreads support.
4010 * Locale names, including those obtained from environment variables (LANG
4011 and the LC_* variables), are more tightly checked for proper syntax.
4012 setlocale will now fail (with EINVAL) for locale names that are overly
4013 long, contain slashes without starting with a slash, or contain ".." path
4014 components. (CVE-2014-0475) Previously, some valid locale names were
4015 silently replaced with the "C" locale when running in AT_SECURE mode
4016 (e.g., in a SUID program). This is no longer necessary because of the
4019 * On x86-64, the dynamic linker's lazy-binding support is now compatible
4020 with application code using Intel MPX instructions. (With all previous
4021 versions, the MPX register state could be clobbered when making calls
4022 into or out of a shared library.) Note that while the new dynamic
4023 linker is compatible with all known x86 hardware whether or not it
4024 supports Intel MPX, some x86 instruction-set emulators might fail to
4025 handle the new instruction encodings. This is known to affect Valgrind
4026 versions up through 3.9 (but will be fixed in the forthcoming 3.10
4027 release), and might affect other tools that do instruction emulation.
4029 * Support for loadable gconv transliteration modules has been removed.
4030 The support for transliteration modules has been non-functional for
4031 over a decade, and the removal is prompted by security defects. The
4032 normal gconv conversion modules are still supported. Transliteration
4033 with //TRANSLIT is still possible, and the //IGNORE specifier
4034 continues to be supported. (CVE-2014-5119)
4036 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
4037 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
4038 resulting a denial-of-service security vulnerability in applications which
4039 use functions related to iconv. (CVE-2014-6040)
4043 * The following bugs are resolved with this release:
4045 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
4046 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
4047 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
4048 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
4049 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
4050 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
4051 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
4052 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
4053 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
4054 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
4055 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
4056 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
4057 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
4058 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
4059 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
4060 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
4061 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
4062 16431, 16453, 16474, 16506, 16510, 16529
4064 * Slovenian translations for glibc messages have been contributed by the
4065 Translation Project's Slovenian team of translators.
4067 * The public headers no longer use __unused nor __block. This change is to
4068 support compiling programs that are derived from BSD sources and use
4069 __unused internally, and to support compiling with Clang's -fblock
4070 extension which uses __block.
4072 * CVE-2012-4412 The strcoll implementation caches indices and rules for
4073 large collation sequences to optimize multiple passes. This cache
4074 computation may overflow for large collation sequences and may cause a
4075 stack or buffer overflow. This is now fixed to use a slower algorithm
4076 which does not use a cache if there is an integer overflow.
4078 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
4079 rules for large collation sequences to optimize multiple passes and falls
4080 back to alloca if malloc fails, resulting in a possible stack overflow.
4081 The implementation now falls back to an uncached collation sequence lookup
4084 * CVE-2013-4788 The pointer guard used for pointer mangling was not
4085 initialized for static applications resulting in the security feature
4086 being disabled. The pointer guard is now correctly initialized to a
4087 random value for static applications. Existing static applications need
4088 to be recompiled to take advantage of the fix (bug 15754).
4090 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
4091 to the d_name member of struct dirent, or omit the terminating NUL
4092 character. (Bugzilla #14699).
4094 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
4095 aligned_alloc functions could allocate too few bytes or corrupt the
4096 heap when passed very large allocation size values (Bugzilla #15855,
4099 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
4100 for AF_INET6 has been fixed (Bugzilla #16072).
4102 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
4103 pap_CW, quz_PE, the_NP.
4105 * Substantially revised locales: gd_GB, ht_HT
4107 * The LC_ADDRESS field was updated to support country_car for almost all
4110 * ISO 1427 definitions were updated.
4112 * ISO 3166 definitions were updated.
4114 * The localedef utility now supports --big-endian and --little-endian
4115 command-line options to generate locales for a different system from that
4116 for which the C library was built.
4118 * Binary locale files now only depend on the endianness of the system for
4119 which they are generated and not on other properties of that system. As a
4120 consequence, binary files generated with new localedef may be incompatible
4121 with old versions of the GNU C Library, and binary files generated with
4122 old localedef may be incompatible with this version of the GNU C Library,
4123 in the following circumstances:
4125 + Locale files may be incompatible on m68k systems.
4127 + Locale archive files (but not separate files for individual locales) may
4128 be incompatible on systems where plain "char" is signed.
4130 * The configure option --disable-versioning has been removed. Builds with
4131 --disable-versioning had not worked for several years.
4133 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
4134 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
4136 * SystemTap probes for malloc have been introduced.
4138 * SystemTap probes for slow multiple precision fallback paths of
4139 transcendental functions have been introduced.
4141 * Support for powerpc64le has been added.
4143 * The soft-float powerpc port now supports e500 processors.
4145 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
4147 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
4148 set of header declarations that are enabled by default, even when other
4149 feature test macros or compiler options such as -std=c99 would otherwise
4150 disable some of those declarations.
4152 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
4153 conflict with POSIX. The libbsd-compat library (which was a dummy library
4154 that did nothing) has also been removed.
4156 * Preliminary documentation about Multi-Thread, Async-Signal and
4157 Async-Cancel Safety has been added.
4159 * Change of ABI data structures for s390 and s390x:
4160 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
4161 allow for future hardware extensions. All library functions that accept or
4162 return these structures were versioned in order to provide backwards
4163 compatibility with existing code. However, not all cases can be handled
4164 with interface versioning. If an application embeds either structure into
4165 another structure and that structure is passed to another compilation unit
4166 which expects the newer larger-sized object then any access to the new
4167 fields will result in undefined behaviour. Similarly any access to fields
4168 that were moved by the enlarging of the structures will cause undefined
4169 behaviour. To fix the undefined behaviour all objects that are part of the
4170 final in-memory image must agree on the size of structures, and this may
4171 require recompilation.
4175 * The following bugs are resolved with this release:
4177 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
4178 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
4179 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
4180 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
4181 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
4182 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
4183 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
4184 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
4185 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
4186 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
4187 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
4188 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
4189 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
4192 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
4193 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
4194 Distributions can re-enable building and using pt_chown via the new configure
4195 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
4196 considerable security risks and should only be used if the distribution
4197 understands and accepts the risks.
4199 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
4202 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
4203 fixed (Bugzilla #15330).
4205 * Add support for calling C++11 thread_local object destructors on thread
4206 and program exit. This needs compiler support for offloading C++11
4207 destructor calls to glibc.
4209 * Improved worst case performance of libm functions with double inputs and
4212 * Support for priority inherited mutexes in pthread condition variables on
4213 non-x86 architectures.
4215 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
4217 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
4219 * Optimized string functions for ARM. Implemented by Will Newton and
4222 * Optimized libm functions for SPARC. Implemented by David S. Miller.
4224 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
4227 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
4228 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
4230 * Added a benchmark framework to track performance of functions in glibc.
4232 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
4233 It is based on draft TS 18661 and currently enabled as a GNU extension.
4235 * On Linux, the clock function now uses the clock_gettime system call
4236 for improved precision, rather than old times system call.
4238 * Added support for version-3 tz format files. This is needed when using
4239 the tz database release 2013e or later, and affects a few unusual cases --
4240 currently only TZ='America/Godthab' for time stamps after 2037.
4242 * Added new API functions pthread_getattr_default_np and
4243 pthread_setattr_default_np to get and set the default pthread
4244 attributes of a process.
4246 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
4247 This may improve lock scaling of existing programs on TSX capable systems.
4248 When the --enable-lock-elision=yes parameter is specified at configure
4249 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
4252 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
4253 availability). Implemented by Ryan S. Arnold.
4255 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
4259 * The following bugs are resolved with this release:
4261 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
4262 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
4263 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
4264 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
4265 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
4266 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
4267 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
4268 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
4269 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
4270 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
4271 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
4272 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
4273 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
4274 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
4275 14879, 14889, 14893, 14898, 14914.
4277 * Optimization of memcpy for MIPS.
4279 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
4280 EMFILE has been fixed (Bugzilla #14889).
4282 * The add-on ports collection is now distributed in the "ports" subdirectory
4283 of the main GNU C Library distribution, rather than separately.
4285 * Port to ARM AArch64 contributed by Linaro.
4287 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
4288 Optimized versions of memcpy, memset, and memcmp added for System z10 and
4290 Implemented by Andreas Krebbel.
4292 * The new function secure_getenv allows secure access to the environment,
4293 returning NULL if running in a SUID/SGID process. This function replaces
4294 the internal function __secure_getenv.
4296 * SystemTap static probes have been added into the dynamic linker.
4297 Implemented by Gary Benson.
4299 * Optimizations of string functions strstr, strcasestr and memmem.
4300 Implemented by Maxim Kuvyrkov.
4302 * The minimum Linux kernel version that this version of the GNU C Library
4303 can be used with is 2.6.16.
4305 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
4306 powerpc POWER7. Implemented by Will Schmidt.
4308 * New configure option --disable-nscd builds the C library such that it
4309 never attempts to contact the Name Service Caching Daemon (nscd).
4310 New configure option --disable-build-nscd avoids building nscd itself;
4311 this is the default if --disable-nscd is used.
4313 * Improved support for cross-compilation, including cross-testing and
4314 bootstrap builds without a previously built glibc.
4316 * Several testsuite tests are now able to test multiple IFUNC variants of an
4317 interface, rather than just testing the one that would be chooen by
4320 * New configure options --with-bugurl and --with-pkgversion, for
4321 distributors to use to embed their bug-reporting and package version
4322 information in --help and --version output.
4324 * The ttyname and ttyname_r functions on Linux now fall back to searching for
4325 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
4326 allows creation of chroots without the procfs mounted on /proc.
4328 * The `crypt' function now fails if passed salt bytes that violate the
4329 specification for those values. On Linux, the `crypt' function will
4330 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
4331 enabled, and fail on encrypted strings using the MD5 or DES algorithm
4332 when the mode is enabled.
4334 * The `clock_*' suite of functions (declared in <time.h>) is now available
4335 directly in the main C library. Previously it was necessary to link with
4336 -lrt to use these functions. This change has the effect that a
4337 single-threaded program that uses a function such as `clock_gettime' (and
4338 is not linked with -lrt) will no longer implicitly load the pthreads
4339 library at runtime and so will not suffer the overheads associated with
4340 multi-thread support in other code such as the C++ runtime library.
4342 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
4347 * The following bugs are resolved with this release:
4349 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
4350 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
4351 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
4352 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
4353 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
4354 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
4355 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
4356 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
4357 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
4358 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
4359 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
4360 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
4361 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
4362 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
4363 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
4364 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
4365 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
4366 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
4367 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
4368 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
4369 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
4370 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
4373 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
4374 configuring glibc with:
4375 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
4376 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
4377 Implemented by H.J. Lu.
4381 + define static_assert
4383 + do not declare gets
4385 + declare at_quick_exit and quick_exit also for ISO C11
4387 + aligned_alloc. NB: The code is deliberately allows the size parameter
4388 to not be a multiple of the alignment. This is a moronic requirement
4389 in the standard but it is only a requirement on the caller, not the
4392 + timespec_get added
4394 + uchar.h support added
4396 + CMPLX, CMPLXF, CMPLXL added
4398 Implemented by Ulrich Drepper.
4400 * Support for the IA-64 has been moved to ports.
4402 * Remove support for anything but ELF binary format
4404 * Checking versions of poll, ppoll added.
4405 Implemented by Ulrich Drepper.
4407 * More generic and 64-bit performance optimizations to math functions.
4408 Implemented by Ulrich Drepper.
4410 * New configure option --enable-obsolete-rpc makes the deprecated RPC
4411 headers and functions available at compile time as they were before
4412 version 2.14. This option will be removed at some time in the future
4413 after the TI-RPC library becomes fully sufficient for the needs of
4414 existing applications.
4416 * Compatibility code for Linux kernel versions before 2.4 has been removed.
4417 Note that glibc is not expected to work with any Linux kernel version
4420 * New header <sys/auxv.h> and function getauxval allowing easy access to
4421 the AT_* key-value pairs passed from the Linux kernel. The header also
4422 defines the HWCAP_* bits associated with the AT_HWCAP key.
4424 * New locales: mag_IN
4426 * New configure option --enable-systemtap builds SystemTap static probes
4427 into libc for setjmp and longjmp and into libpthread for various operations.
4428 So far the setjmp/longjmp probes and some of the libpthread probes are
4429 provided only for i*86 and x86_64.
4430 Implemented by Roland McGrath and Rayson Ho.
4432 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
4434 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
4437 * More optimized functions for SPARC. Implemented by David S. Miller.
4439 * Improved support for cross-compilation, especially bootstrap builds
4440 without a previously built glibc.
4442 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
4443 Chris Metcalf from Tilera.
4445 * Support for the old ARM ABI has been removed from ports. Only the EABI is
4446 now supported for ARM processors.
4448 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
4449 as the name of the dynamic linker, to distinguish it from the
4450 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
4452 * Support for CRIS has been removed from ports.
4454 * A new class of installed header has been documented for low-level
4455 platform-specific functionality. PowerPC added the first instance with a
4456 function to provide time base register access. Contributed by Tulio
4457 Magno Quites Machado Filho.
4459 * ix86 configurations now install header files that are consistent with
4460 what x86-64 configurations install. These same header files can be used
4461 for -m32, -m64, or -mx32 builds.
4462 Contributed by H.J. Lu.
4464 * Math library bug fixes. A thorough audit of all open math library bugs was
4465 conducted by Joseph Myers. Significant progress was made on many math
4466 library bugs resulting in more accurate exceptions and function results.
4467 Many thanks to all those that contributed including Andreas Jaeger for his
4468 patch review and work on the x87 trigonometric instruction issues.
4470 * Timezone data is no longer installed. Timezone-related binaries and scripts
4471 will continue to be installed. Users should obtain their timezone data from
4472 their distribution provider or from the tzdata package at
4473 <ftp://munnari.oz.au/pub/>.
4477 * The following bugs are resolved with this release:
4479 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
4480 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
4481 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
4482 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
4483 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
4484 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
4485 13484, 13506, 13515, 13523, 13524, 13538, 13540
4487 * New program pldd to list loaded object of a process
4488 Implemented by Ulrich Drepper.
4490 * Add nss_db support back to glibc. No more dependency on Berkeley db
4491 and support for initgroups lookups.
4492 Implemented by Ulrich Drepper.
4494 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4495 Contributed by HJ Lu.
4497 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4498 Contributed by HJ Lu.
4500 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4501 on x86-32 and x86-64.
4502 Contributed by Liubov Dmitrieva.
4504 * Optimized strchr and strrchr for SSE on x86-32.
4505 Contributed by Liubov Dmitrieva.
4507 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4508 for x86-64 and x86-32.
4509 Contributed by Liubov Dmitrieva.
4511 * New interfaces: scandirat, scandirat64
4512 Implemented by Ulrich Drepper.
4514 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4515 Implemented by Ulrich Drepper.
4517 * nscd now also caches the netgroup database.
4518 Implemented by Ulrich Drepper.
4520 * Integrate libm with gcc's -ffinite-math-only option.
4521 Implemented by Ulrich Drepper.
4523 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4524 to math functions. Implemented by Ulrich Drepper.
4526 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4527 Implemented by Ulrich Drepper.
4529 * New Linux interfaces: process_vm_readv, process_vm_writev
4531 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4532 Implemented by Ulrich Drepper.
4534 * Optimized nearbyint and strcasecmp for PPC.
4535 Implemented by Adhemerval Zanella.
4537 * New locales: bho_IN, unm_US, es_CU, ta_LK
4541 * The following bugs are resolved with this release:
4543 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4544 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4545 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4546 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4547 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4548 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4549 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4550 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4551 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4552 12795, 12811, 12813, 12814, 12841
4554 * The RPC implementation in libc is obsoleted. Old programs keep working
4555 but new programs cannot be linked with the routines in libc anymore.
4556 Programs in need of RPC functionality must be linked against TI-RPC.
4557 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4559 Visible changes of this change include (obviously) the inability to link
4560 programs using RPC functions without referencing the TI-RPC library and the
4561 removal of the RPC headers from the glibc headers.
4562 Implemented by Ulrich Drepper.
4564 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4565 syncfs, setns, sendmmsg
4567 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4568 yue_HK, lij_IT, mhr_RU
4570 * New encodings: CP770, CP771, CP772, CP773, CP774
4572 * New program sotruss to trace calls through PLTs
4573 Implemented by Ulrich Drepper.
4575 * The malloc hook implementation is marked deprecated and will be removed
4576 from the default implementation in the next version. The design never
4577 worked ever since the introduction of threads. Even programs which do
4578 not create threads themselves can use multiple threads created internally.
4582 * The following bugs are resolved with this release:
4584 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4585 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4586 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4587 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4590 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4592 * POWER7 optimizations: memset, memcmp, strncmp
4594 * New optimized string functions for x86-64: strnlen (SSE2),
4595 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4596 Implemented by Ulrich Drepper.
4600 * The following bugs are resolved with this release:
4602 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4603 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4604 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4605 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4606 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4607 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4608 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4609 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4611 * New interfaces: pthread_getname_np, pthread_setname_np
4613 * New Linux interface: recvmmsg
4615 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4617 * The dynamic linker now recognizes supported ABI versions from the
4618 EI_ABIVERSION field in the ELF header.
4619 Implemented by Ulrich Drepper.
4621 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4622 will not be used to fill in password fields in the passwd.byname replies.
4623 Instead it is used to synthesize the shadow.byname table, should it be
4624 missing. This is a useful mode in some installations involving Solaris.
4625 Implemented by Ulrich Drepper.
4627 * New locales: kok_IN, sq_MK, cv_RU
4631 * The following bugs are resolved with this release:
4633 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4634 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4635 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4636 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4637 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4638 10789, 10817, 10823, 10840, 10847
4640 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4642 Implemented by Ulrich Drepper.
4644 * Checking version of longjmp added that fails if an uninitialized stack
4645 frame would be created. Implemented by Ulrich Drepper.
4647 * STT_GNU_IFUNC is now supported in static executables.
4648 Implemented by H.J. Lu.
4650 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4652 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4653 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4654 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4655 Contributed by H.J. Lu.
4657 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4658 Implemented by Ulrich Drepper.
4660 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4662 Contributed by H.J. Lu.
4664 * Support for fma instruction in AVX on x86-64.
4665 Implemented by H.J. Lu and Ulrich Drepper.
4667 * AVX support in x86-64 auditing support in ld.so.
4668 Implemented by H.J. Lu.
4670 * STB_GNU_UNIQUE support added.
4671 Implemented by Ulrich Drepper.
4673 * Implement second fallback mode for optimized DNS lookup for even more
4674 broken environments. If two requests from the same port are not
4675 handled correctly close the socket and open a new one before sending
4676 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4677 can be used to select this mode right away, instead of rediscovering the
4678 necessity is every process again.
4679 Implemented by Ulrich Drepper.
4681 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4682 Implemented by Adam Tkac.
4684 * Optimized iconv conversions for S390x.
4685 Implemented by Andreas Krebbel.
4687 * Using condvars with PI mutexes is now more efficient due to kernel
4688 support for requeueing to PI futexes. NPTL support added for x86-64.
4689 Implemented by Ulrich Drepper.
4691 * New locales: ps_AF, my_MM
4695 * The following bugs are resolved with this release:
4697 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4698 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4699 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4700 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4701 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4703 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4704 Implemented by Ulrich Drepper.
4706 * New Linux interfaces: accept4, fallocate, fallocate64.
4707 Implemented by Ulrich Drepper.
4709 * Correct declarations of string function when used in C++ code. This
4710 could lead to compile errors for invalid C++ code.
4712 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4715 * New POSIX 2008 interface: psiginfo
4716 Implemented by Ulrich Drepper.
4718 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4719 Implemented by Ulrich Drepper.
4721 * Support for selecting between multiple function definitions at runtime
4722 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4724 * The libcrypt library can now use the hash function implementations in
4725 NSS. Implemented by Ulrich Drepper.
4727 * The malloc implementation can be compiled to be less memory efficient
4728 but higher performing in multi-threaded programs.
4729 Implemented by Ulrich Drepper.
4731 * New locales: nan_TW@latin, ks_IN
4733 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4734 Implemented by Ulrich Drepper.
4736 * Extended printf hook support. It is possible to use user-defined types
4737 and extend existing format specifiers.
4738 Implemented by Ulrich Drepper.
4740 * Handling for group shadow files has been added.
4741 Implemented by Ulrich Drepper.
4743 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4744 servers (the case, e.g., for some people using the built-in DNS
4745 server in ADSL modems/routers). There is a once-per-process timeout
4746 in case of a broken server. To avoid it, users can run nscd or put
4747 'options single-request' in /etc/resolv.conf.
4748 Implemented by Ulrich Drepper.
4752 * The following bugs are resolved with this release:
4754 2447, 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447,
4755 6461, 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712,
4756 6713, 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839,
4757 6843, 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955,
4758 6966, 6968, 6974, 6980, 6995, 7008, 7009, 7029
4760 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4761 up at the same time. Implemented by Ulrich Drepper.
4763 * TLS descriptors for LD and GD on x86 and x86-64.
4764 Implemented by Alexandre Oliva.
4766 * getaddrinfo now handles DCCP and UDPlite.
4767 Implemented by Ulrich Drepper.
4769 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4770 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4771 Implemented by Ulrich Drepper.
4773 * New implementation of memmem, strstr, and strcasestr which is O(n).
4774 Implemented by Eric Blake.
4776 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4778 * Implement "e" option for popen to open file descriptor with the
4779 close-on-exec flag set. Implemented by Ulrich Drepper.
4781 * Implement "b" mode for fmemopen. In this mode writes writes don't
4782 implicitly add a NUL byte and seeks from the end of the buffer really
4783 use the buffer end, not the string length as the basis.
4784 Implemented by Ulrich Drepper.
4786 * Many functions, exported and internal, now atomically set the close-on-exec
4787 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4789 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4791 Implemented by Pravin Satpute.
4793 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4797 * The following bugs are resolved with this release:
4799 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4800 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4801 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4802 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4803 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4804 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4805 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4807 * New locales: bo_CN, bo_IN, shs_CA.
4809 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4811 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4812 Implemented by Pravin Satpute.
4814 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4816 * nscd caches now all timeouts for DNS entries
4817 Implemented by Ulrich Drepper.
4819 * nscd is more efficient and wakes up less often.
4820 Implemented by Ulrich Drepper.
4822 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4823 vdprintf, and obstack_vprintf.
4824 Implemented by Jakub Jelinek.
4826 * Faster memset for x86-64.
4827 Implemented by Harsha Jagasia and H.J. Lu.
4829 * Faster memcpy on x86.
4830 Implemented by Ulrich Drepper.
4832 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4833 Implemented by Ulrich Drepper.
4835 * Faster sqrt and sqrtf implemention for some PPC variants.
4836 Implemented by Steven Munroe.
4840 * The following bugs are resolved with this release:
4842 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4843 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4844 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4845 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4846 5071, 5103, 5104, 5112, 5113, 5184, 5186
4848 * More checking functions: fread, fread_unlocked, open*, mq_open.
4849 Implemented by Jakub Jelinek and Ulrich Drepper.
4851 * Extend fortification to C++. Implemented by Jakub Jelinek.
4853 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4854 by not recognizing 'a' as a modifier when those specs are requested.
4855 Implemented by Jakub Jelinek.
4857 * PPC optimizations to math and string functions.
4858 Implemented by Steven Munroe.
4860 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4861 options to be passed. Implemented by Ulrich Drepper.
4863 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4865 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4866 Implemented by Ulrich Drepper.
4868 * Handle private futexes in the NPTL implementation.
4869 Implemented by Jakub Jelinek and Ulrich Drepper.
4871 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4872 Implemented by Roland McGrath and Ulrich Drepper.
4874 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4876 * SHA-256 and SHA-512 based password encryption.
4877 Implemented by Ulrich Drepper.
4879 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4880 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4883 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4884 Implemented by Ulrich Drepper.
4888 * The following bugs are resolved with this release:
4890 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4891 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4892 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4893 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4894 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4895 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4896 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4899 * New Linux interfaces: epoll_pwait, sched_getcpu.
4901 * New generic interfaces: strerror_l.
4903 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4907 * The following bugs are resolved with this release:
4909 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4910 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4911 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4912 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4913 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4914 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4915 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4916 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4917 3225, 3251, 3252, 3253, 3273
4919 * For Linux, the sorting of addresses returned by getaddrinfo now also
4920 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4921 Implemented by Ulrich Drepper.
4923 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4924 Implemented by Ulrich Drepper.
4926 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4928 * New iconv module for MIK. Contributed by Alexander Shopov.
4930 * For sites with broken group and/or passwd database, the auto-propagate
4931 option of nscd can prevent creating ID lookup entries from the results
4932 of a name lookup and vice versa. This usually is no problem but some
4933 site might have problems with the default behavior.
4934 Implemented by Ulrich Drepper.
4936 * Iterating over entire database in NIS can be slow. With the
4937 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4938 to trade time for memory. The entire database will be read at once.
4939 Implemented by Ulrich Drepper.
4941 * The interfaces introduced in RFC 3542 have been implemented by
4944 * Support for the new ELF hash table format was added by Ulrich Drepper.
4946 * Support for priority inheritance mutexes added by Jakub Jelinek and
4949 * Support for priority protected mutexes added by Jakub Jelinek.
4951 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4952 or_IN, csb_PL, fy_NL, sr_ME.
4956 * More overflow detection functions.
4958 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4959 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4961 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4962 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4963 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4964 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4965 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4966 by Masahide Washizawa.
4968 * It is now possible to install audit libraries for the dynamic linker using
4969 LD_AUDIT. Implemented by Ulrich Drepper.
4971 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4972 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4973 For a libc and libpthread that works well on Linux 2.4 kernels, we
4974 recommend using the stable 2.3 branch.
4976 * The new function open_wmemstream acts like open_memstream,
4977 but uses a wchar_t wide character buffer.
4979 * The new function ppoll is an improved version of poll, similar to pselect.
4981 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4982 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4983 renameat, unlinkat, linkat, symlinkat, readlinkat.
4985 * New Linux kernel system calls: unshare,
4986 inotify_init, inotify_add_watch, inotify_rm_watch.
4988 * The euidaccess function is now also known by the alias eaccess,
4989 for compatibility with some other systems.
4991 * Timezone data updated to 2006b version.
4995 * The following bugs are resolved with this release:
4997 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4998 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4999 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
5000 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
5001 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
5002 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
5004 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5006 * As of this release, GCC 4 can be used to compile the C Library.
5008 * Timezone data updated to 2005m version.
5012 * The following bugs are resolved with this release:
5014 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
5015 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
5016 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
5017 777, 787, 821, 822, 823, 825
5019 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5023 * Support for RFC 3678. Real implementations exist only for Linux so far.
5024 Implemented by Ulrich Drepper.
5026 * nscd can now cache entries persistently. Expiring entries are reloaded.
5027 For speedups the cache can be shared in memory with client processes.
5028 Implemented by Ulrich Drepper.
5030 * nscd can now perform SELinux checks.
5031 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
5033 * getaddrinfo queries are now cached. Canonical name lookup is performed
5035 Implemented by Ulrich Drepper.
5037 * The nothrow function attribute is used when headers are used by gcc when
5038 compiling C code. This can avoid significant amounts of exception
5041 * The malloc functions perform more error checking and are stricter when
5042 it comes to reacting on errors. The default action is to terminate
5043 the process after showing an error message. Implemented by Ulrich Drepper.
5045 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
5046 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
5048 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
5049 namespaces using the new function dlmopen(). This feature is of course,
5050 like most other dynamic loading functionality, not available in statically
5051 linked applications. Implemented by Ulrich Drepper.
5053 * Low-overhead boundary checking variants of string and some stdio functions
5054 were added. These are to be used in conjunction with a gcc patch by
5055 Jakub Jelinek which adds calls to these functions if possible.
5056 Implemented by Jakub Jelinek and Ulrich Drepper.
5058 * Old code for several operating systems and machine architectures that
5059 have not been in working condition in a long time have been removed from
5060 the main source tree maintained by the GNU C Library's maintainers.
5061 These files are now reside in the separate `ports' source module
5062 that is usable as an add-on when building the library.
5066 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
5067 interrogate the dynamic linker, compatible with the Solaris interface.
5069 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
5070 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
5072 * getifaddrs now uses the netlink interface on Linux to get its information.
5073 Implemented by Thorsten Kukuk.
5075 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
5076 Implemented by Ulrich Drepper.
5078 * support for non-executable stacks on x86 has been added. Changes mostly
5081 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
5084 * getaddrinfo now performs destination address selection according to
5089 * Thread-safe interfaces for many functions that access locale data
5090 were added in version 2.3, but these features were omitted from NEWS.
5091 Many functions have variants with an `_l' suffix that take a `locale_t'
5092 object as a parameter rather than consulting the current locale.
5093 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
5094 create and maintain `locale_t' objects. Additionally, the new function
5095 `uselocale' sets "the current locale" (as used by functions not so
5096 parameterized) set for an individual thread. These features were added
5097 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
5099 * The functions getresuid, getresgid, setresuid, and setresgid, which
5100 have long been available on Linux, are now declared in <unistd.h>
5101 and are now also available on the Hurd.
5103 * ELF thread-local storage support (TLS) now works on x86-64.
5105 * The new dynamic string token $LIB is expanded in shared library names.
5106 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
5108 * Aldy Hernandez contributed complete software floating point support for
5109 PowerPC machines with no FPU.
5111 * fexecve is implemented on Linux.
5113 * The `btowc' function should work at least twice as fast due to
5114 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
5116 * With approriate thread add-ons cancelable functions are now implemented
5117 in libc.so as well. No need to call the function in libpthread. This
5118 change allowed to finally disable the incorrect and expensive handling
5119 of weak definition in ld.so.
5121 * Yet more PLT entries in libc.so have been removed. We finally arrived
5122 at the bare minimum. Startup times improved appropriately.
5124 * Support for the new Linux/x86 system call interface was added. The
5125 AT_SYSINFO auxiliary vector entry is recognized and handled.
5129 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
5132 * iconv (the program and the interface) now accepts empty names (excluding
5133 options like //TRANSLIT) to mean "use charset of current locale".
5135 * localedef can now transliterate characters in strings which are not in
5136 the provided charmap. The information from the input locale is used.
5138 * Prelinking support was added for ELF targets. This requires additional
5139 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
5141 * Read-only stdio streams now use mmap to speed up operation by eliminating
5142 copying and buffer underflows. To use add 'm' to the mode string of
5143 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
5145 * The malloc functions were completely rewritten by Wolfram Gloger based
5146 on Doug Lea's malloc-2.7.0.c.
5148 * Isamu Hasegawa contributed a completely new and POSIX-conformant
5149 implementation of regex.
5151 * Bruno Haible upgraded the iconv and locale implementation to support
5154 * Contents of the LC_* and LANG environment variables in the CEN style are
5155 not recognized anymore. It never was used. Change by Ulrich Drepper.
5157 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
5158 thread-local storage (TLS) ABI on some platforms.
5159 Changes by Ulrich Drepper. SH support by Kaz Kojima.
5161 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
5162 EUC-JISX0213, and TSCII.
5164 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
5165 BSD-compatible interface for getting all network interface addresses.
5166 Implementation for IPv4 by Roland McGrath.
5168 * Loading of locale data is faster due to the introduction of a locale
5169 archive. Implemented by Roland McGrath and Ulrich Drepper.
5171 * Startup times are significantly reduced by not using exported functions
5172 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
5175 * Steven Munroe contributed a port to PowerPC64/Linux.
5179 * The Hurd now uses the GNU libio implementation of stdio rather than the
5180 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
5182 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
5183 with the same behavior as the Linux system call of the same name.
5187 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
5188 128-bit long double format.
5190 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
5191 IBM1161, and IBM1162 charsets.
5193 * Andreas Jaeger contributed a port to x86-64/Linux.
5195 * Peter Bruin contributed a port to PowerPC/Hurd.
5197 * libc functions using I/O streams now can handle wide-oriented streams
5200 * optimizations in the dynamic linker. Binaries created by recent binutils
5201 versions start up quicker due to reduced time spent on relocations.
5203 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
5207 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
5208 asinh, atanh, j0 for the 128-bit long double format.
5210 * Bruno Haible updated all the code handling Unicode in some form to
5211 support Unicode 3.1.
5213 * Speed of regex for single-byte locales is back to previous levels.
5214 Patch by Isamu Hasegawa.
5216 * Alpha, SPARC, and IA-64 now also using floating stacks.
5218 * Startup time of internationalized applications greatly improved through
5219 iconv cache. Use iconvconfig to generate the cache file.
5220 Contributed by Ulrich Drepper.
5222 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
5223 severe performance problems. Patch by David Mosberger.
5225 * The Hurd port got a lot more functionality like AIO, various stdio
5226 extensions, etc. Mainly done by Roland McGrath.
5228 * mtrace can now lookup symbols in shared libraries.
5232 * Intel's IA-64 math library is largely integrated. It provides fast and
5233 accurate implementatations for most basic and standard math functions
5234 in float, double, and long double format.
5236 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
5237 and asin for the 96-bit long double format and asin, log, tan for the
5238 128-bit long double format.
5240 * The beginning of a last-bit accurate math library by IBM Haifa were added.
5241 The basic double functions exist today. Contributed by Abraham Ziv
5242 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
5243 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
5245 * An asynchronous name lookup library was added. The interface is designed
5246 after POSIX AIO. The proposal was circulated beforehand to get comments.
5247 No negative ones came in. Implemented by Ulrich Drepper.
5249 * Port to S390/64bit contributed by Martin Schwidefsky
5250 <schwidefsky@de.ibm.com>.
5252 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
5253 of functions for Linux/IA-64.
5255 * The RPC code is now thread safe. Threads can now use the same service
5256 of different services at the same time. Patch by Eric Norum
5257 <eric.norum@usask.ca> with some help by Ulrich Drepper.
5259 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
5260 family of functions for Linux/S390.
5262 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
5263 of functions for Linux/x86.
5265 * Port to Linux/CRIS contributed by Axis Communications.
5269 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
5270 we can now check for namespace violations and missing declarations. The
5271 result is that almost all headers are now Unix-compliant (as defined in
5272 the upcoming XPG6). The negative side is that some programs might need
5273 corrections, too, if they depend on the incorrect form of the headers in
5274 previous versions which defined too many symbols and included too many
5277 * regex now handles multibyte character sets correctly.
5278 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
5280 * iconv (the program) does now conform to the upcoming XPG6 and handles
5281 charmaps. Instead of the charset names the path of charmaps can be
5282 provided and the conversion happens based on this data.
5283 Contributed by Ulrich Drepper.
5285 * The locale program now provides detailed information about the installed
5290 only lists the names of the supported locales
5294 provides details such as country, language, and codeset name.
5295 Contributed by Ulrich Drepper.
5299 * The gencat program now parses the input file according to the charset
5300 selected by the LC_CTYPE category. This is important for stateful
5301 character sets. To make generating catalogs easier there is a way
5302 to overwrite the charset selected by the locale: before the first
5303 message or $ quote line the catalog can contain a line like
5305 $ codeset=ISO-8859-2
5307 to select the charset (ISO-8859-2 in this case).
5309 Implemented by Shinya Hanataka and Ulrich Drepper.
5311 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
5312 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
5313 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
5315 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
5316 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
5318 * The LANGUAGE environment variable is now ignored unless the locale is
5319 changed from the default "C" locale.
5321 * The usual bug fixes.
5325 * Greg McGary added runtime support for bounds checking using gcc's
5326 new -fbounded-pointers option. ix86 target is complete. PowerPC
5329 * Thorsten Kukuk added secure mode support to nscd.
5331 * The Berkeley db libraries have been removed.
5333 Related, the nss_db module is now in a separate package since it
5334 obviously requires a database library being available.
5336 * Wide character I/O streams implemented by Ulrich Drepper.
5338 * Functions from the extended socket API added by Ulrich Drepper.
5340 * Functions feenableexcept and fedisableexcept to control the
5341 behaviour of individual exceptions have been added by Andreas Jaeger.
5343 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
5345 * The resolver code has been updated from bind 8.2.3-T5B which supports
5346 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
5349 This change could in some situations effect backward compatibility. Since
5350 now `_res' is a thread-local instead of a global variable, modifying it
5351 in one thread does not have any effect in other threads.
5353 The resolver library was also extended to allow IPv6 as the transport
5354 protocol for the requests. This work was done by Stig Venaas.
5356 * Compatibility code for K&R C compilers has been removed from the
5357 header files. A ISO C compiler is needed to use the library
5358 (conforming to either C89 or C99 standard).
5360 * Complete rewrite of the localedef program to support multibyte character
5361 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
5362 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
5363 Implemented by Ulrich Drepper.
5365 Bruno Haible significantly improved the generation and use of the data
5366 structures for the wide character tables.
5368 * Plural handling in gettext implemented by Ulrich Drepper.
5370 * The utmp daemon has been removed.
5372 * The port to MIPS-Linux has been finished by Andreas Jaeger.
5374 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
5377 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
5379 * POSIX barriers implemented by Kaz Kylheku.
5381 * POSIX spawn function family implemented by Ulrich Drepper.
5383 * POSIX spinlocks are now available.
5385 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
5387 * the configure option --enable-kernel=X.Y.Z allows to strip out
5388 compatibility for kernel versions before X.Y.Z. This is currently only
5389 implemented for Linux.
5391 * the sockaddr_in6 structure changed. The IPv6 working group added a new
5392 field sin6_scope_id. This means that all programs using IPv6 should be
5393 recompiled. Don't expect binary compatibility with previous glibc
5396 * various conversion modules for IBM character sets contributed by
5399 * IA-64 port by Jes Sorensen and HJ Lu.
5413 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
5415 * New xdr functions are added; some rpc functions are now 64bit clean.
5417 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
5419 * Fixed known incompatibilities with glibc 2.0.
5421 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
5423 * Optimized a number of functions (especially the ELF dynamic loader).
5425 * Update timezone data files.
5427 * lots of charmaps corrections
5429 * some new locale definitions and charmaps
5434 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
5435 conform to POSIX member type requirements. Symbol versions have been
5436 adjusted as needed within the library, and for direct use by applications,
5437 but there is potential for problems if third-party libraries use
5438 struct timeval as part of their interface. This does not present
5439 a problem for X and other "essential" system libraries.
5441 * An additional locale model to support C++ Standard Library locale
5442 model and probably more was implemented by Ulrich Drepper.
5444 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
5447 * Miles Bader provided the `argp' function family to support hierachical
5448 command line argument parsing, layered on top of getopt.
5450 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
5452 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
5455 * scanf recognizes the %a and %A format for scanning floating point numbers.
5457 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
5458 information and interfaces for the available integer types.
5460 * about 130 new math functions were added to implement the ISO C9x math
5463 * the new header <complex.h> contains definitions of the complex math
5464 functions from ISO C 9X.
5466 * the new header <tgmath.h> defines generic macros to use complex or
5467 real valued functions.
5469 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
5471 * Andreas Jaeger provided a test suite for the math library.
5473 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
5475 * Ulrich Drepper added character set conversion functions (iconv).
5477 * Optimized string functions have been added.
5479 * The localedata addon is now part of glibc.
5481 * An implementation of profiling shared libraries was added by Ulrich Drepper.
5483 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
5484 daemon for NSS (nscd).
5486 Missing a better place here are some numbers on improvements. Under
5487 Linux 2.1.125 un-tar-ing the kernel sources takes
5491 using local files 12.19s 6.88s 22.91s
5493 using NIS 13.92s 8.91s 26.34s
5495 using NIS & nscd 10.37s 7.34s 25.30s
5497 using NIS+ 27.57s 30.37s 640.46s
5499 using NIS+ & nscd 10.25s 7.83s 26.51s
5501 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5503 Keep in mind that non-namelookup related operations dominate above times.
5504 It was just a common complain that using NIS+ unpacking the kernel is
5507 [1] The old nscd implementation is not available anymore since it was
5508 distributed with glibc up to version 2.0.98 and thus is now replaced.
5510 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5512 * Mark Kettenis provided a Hesiod NSS module.
5514 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5515 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5517 * rcmd can now handle netgroups (Dick Streefland).
5519 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5522 * Support for the IPv6 protocol has been added to the socket API, as per the
5523 latest draft standards.
5525 * Support for Linux 2.2 has been added.
5527 * Interface changes relative to the latest 2.0.x release:
5528 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5529 addseverity NEW: Unix98
5530 alphasort64 NEW: LFS
5531 argp_err_exit_status NEW: argp, GNU ext
5532 argp_error NEW: argp, GNU ext
5533 argp_failure NEW: argp, GNU ext
5534 argp_help NEW: argp, GNU ext
5535 argp_parse NEW: argp, GNU ext
5536 argp_program_bug_address NEW: argp, GNU ext
5537 argp_program_version NEW: argp, GNU ext
5538 argp_program_version_hook NEW: argp, GNU ext
5539 argp_state_help NEW: argp, GNU ext
5540 argp_usage NEW: argp, GNU ext
5541 authdes_create NEW: Secure RPC
5542 authdes_getucred NEW: Secure RPC
5543 authdes_pk_create NEW: Secure RPC
5544 backtrace NEW: GNU ext.
5545 backtrace_symbols NEW: GNU ext.
5546 backtrace_symbols_fd NEW: GNU ext.
5548 cacosf NEW: ISO C 9x
5549 cacosh NEW: ISO C 9x
5550 cacoshf NEW: ISO C 9x
5551 cacoshl NEW: ISO C 9x
5552 cacosl NEW: ISO C 9x
5559 casinf NEW: ISO C 9x
5560 casinh NEW: ISO C 9x
5561 casinhf NEW: ISO C 9x
5562 casinhl NEW: ISO C 9x
5563 casinl NEW: ISO C 9x
5565 catanf NEW: ISO C 9x
5566 catanh NEW: ISO C 9x
5567 catanhf NEW: ISO C 9x
5568 catanhl NEW: ISO C 9x
5569 catanl NEW: ISO C 9x
5570 cbc_crypt NEW: Secure RPC
5574 ccoshf NEW: ISO C 9x
5575 ccoshl NEW: ISO C 9x
5581 cimagf NEW: ISO C 9x
5582 cimagl NEW: ISO C 9x
5583 clearerr_locked REMOVED
5584 clntunix_create NEW: sunrpc ext
5586 clog10 NEW: ISO C 9x
5587 clog10f NEW: ISO C 9x
5588 clog10l NEW: ISO C 9x
5598 cprojf NEW: ISO C 9x
5599 cprojl NEW: ISO C 9x
5601 crealf NEW: ISO C 9x
5602 creall NEW: ISO C 9x
5607 csinhf NEW: ISO C 9x
5608 csinhl NEW: ISO C 9x
5611 csqrtf NEW: ISO C 9x
5612 csqrtl NEW: ISO C 9x
5616 ctanhf NEW: ISO C 9x
5617 ctanhl NEW: ISO C 9x
5619 des_setparity NEW: Secure RPC
5620 ecb_crypt NEW: Secure RPC
5621 endutxent NEW: Unix98
5623 exp10f NEW: ISO C 9x
5624 exp10l NEW: ISO C 9x
5628 fattach NEW: STREAMS
5629 fdetach NEW: STREAMS
5633 feclearexcept NEW: ISO C 9x
5634 fegetenv NEW: ISO C 9x
5635 fegetexceptflag NEW: ISO C 9x
5636 fegetround NEW: ISO C 9x
5637 feholdexcept NEW: ISO C 9x
5639 feraiseexcept NEW: ISO C 9x
5640 ferror_locked REMOVED
5641 fesetenv NEW: ISO C 9x
5642 fesetexceptflag NEW: ISO C 9x
5643 fesetround NEW: ISO C 9x
5644 fetestexcept NEW: ISO C 9x
5645 feupdateenv NEW: ISO C 9x
5646 fflush_locked REMOVED
5650 fgets_unlocked NEW: GNU ext.
5651 fileno_locked REMOVED
5663 fputc_locked REMOVED
5664 fputs_unlocked NEW: GNU ext.
5665 fread_unlocked NEW: GNU ext.
5670 fstatvfs NEW: Unix98
5674 ftruncate64 NEW: LFS
5676 fwrite_unlocked NEW: GNU ext.
5677 gai_strerror NEW: IPv6
5681 getchar_locked REMOVED
5683 getdate_err NEW: Unix98
5684 getdate_r NEW: GNU ext.
5686 getnameinfo NEW: IPv6
5687 getnetname NEW: Secure RPC
5688 getpmsg NEW: STREAMS
5689 getpt NEW: Unix98 PTY
5690 getrlimit64 NEW: LFS
5691 getutxent NEW: Unix98
5692 getutxid NEW: Unix98
5693 getutxline NEW: Unix98
5694 glob64 NEW: GNU ext.
5695 globfree64 NEW: GNU ext.
5696 gnu_get_libc_release NEW: GNU ext.
5697 gnu_get_libc_version NEW: GNU ext.
5698 grantpt NEW: Unix98 PTY
5699 host2netname NEW: Secure RPC
5701 iconv_close NEW: iconv
5702 iconv_open NEW: iconv
5703 if_freenameindex NEW: IPv6
5704 if_indextoname NEW: IPv6
5705 if_nameindex NEW: IPv6
5706 if_nametoindex NEW: IPv6
5707 in6addr_any NEW: IPv6
5708 in6addr_loopback NEW: IPv6
5709 inet6_isipv4mapped NEW: IPv6
5710 isastream NEW: STREAMS
5711 iswblank NEW: GNU ext.
5712 key_decryptsession NEW: Secure RPC
5713 key_decryptsession_pk NEW: Secure RPC
5714 key_encryptsession NEW: Secure RPC
5715 key_encryptsession_pk NEW: Secure RPC
5716 key_gendes NEW: Secure RPC
5717 key_get_conv NEW: Secure RPC
5718 key_secretkey_is_set NEW: Secure RPC
5719 key_setnet NEW: Secure RPC
5720 key_setsecret NEW: Secure RPC
5721 llrint NEW: ISO C 9x
5722 llrintf NEW: ISO C 9x
5723 llrintl NEW: ISO C 9x
5724 llround NEW: ISO C 9x
5725 llroundf NEW: ISO C 9x
5726 llroundl NEW: ISO C 9x
5731 lrintf NEW: ISO C 9x
5732 lrintl NEW: ISO C 9x
5733 lround NEW: ISO C 9x
5734 lroundf NEW: ISO C 9x
5735 lroundl NEW: ISO C 9x
5737 makecontext NEW: Unix98
5738 mempcpy NEW: GNU ext.
5741 modify_ldt NEW: kernel
5745 nearbyint NEW: ISO C 9x
5746 nearbyintf NEW: ISO C 9x
5747 nearbyintl NEW: ISO C 9x
5748 netname2host NEW: Secure RPC
5749 netname2user NEW: Secure RPC
5750 nexttoward NEW: ISO C 9x
5751 nexttowardf NEW: ISO C 9x
5752 nexttowardl NEW: ISO C 9x
5756 passwd2des NEW: Secure RPC
5758 pow10f NEW: GNU ext.
5759 pow10l NEW: GNU ext.
5762 printf_size NEW: GNU ext.
5763 printf_size_info NEW: GNU ext.
5764 profil_counter REMOVED
5765 pthread_mutexattr_getkind_np REPLACED
5766 pthread_mutexattr_setkind_np REPLACED
5767 ptsname NEW: Unix98 PTY
5768 ptsname_r NEW: Unix98 PTY
5770 putchar_locked REMOVED
5771 putgrent NEW: GNU ext.
5773 putpmsg NEW: STREAMS
5774 pututxline NEW: Unix98
5778 readdir64_r NEW: LFS
5779 remquo NEW: ISO C 9x
5780 remquof NEW: ISO C 9x
5781 remquol NEW: ISO C 9x
5783 roundf NEW: ISO C 9x
5784 roundl NEW: ISO C 9x
5786 scalbln NEW: ISO C 9x
5787 scalblnf NEW: ISO C 9x
5788 scalblnl NEW: ISO C 9x
5790 sendfile NEW: kernel
5791 setcontext NEW: Unix98
5792 setrlimit64 NEW: LFS
5793 setutxent NEW: Unix98
5795 sigignore NEW: Unix98
5796 sigqueue NEW: POSIX.1b
5797 sigrelse NEW: Unix98
5798 sigset NEW: POSIX.1b
5799 sigtimedwait NEW: POSIX.1b
5800 sigwaitinfo NEW: POSIX.1b
5801 sincos NEW: GNU ext.
5802 sincosf NEW: GNU ext.
5803 sincosl NEW: GNU ext.
5807 strcasestr NEW: GNU ext.
5808 strtoimax NEW: ISO C 9x
5809 strtoumax NEW: ISO C 9x
5810 strverscmp NEW: GNU ext.
5811 svcauthdes_stats NEW: Secure RPC
5812 svcunix_create NEW: sunrpc etx
5813 svcunixfd_create NEW: sunrpc ext
5814 swapcontext NEW: Unix98
5815 tcgetsid NEW: Unix98 PTY
5816 tdestroy NEW: GNU ext.
5817 tgamma NEW: ISO C 9x
5818 tgammaf NEW: ISO C 9x
5819 tgammal NEW: ISO C 9x
5823 truncf NEW: ISO C 9x
5824 truncl NEW: ISO C 9x
5826 unlockpt NEW: Unix98 PTY
5827 updwtmpx NEW: Unix98
5828 user2netname NEW: Secure RPC
5829 utmpxname NEW: Unix98
5830 versionsort NEW: GNU ext.
5831 versionsort64 NEW: GNU ext.
5833 wcscasecmp NEW: GNU ext.
5834 wcsncasecmp NEW: GNU ext.
5835 wcsnlen NEW: GNU ext.
5836 wcstoimax NEW: ISO C 9x
5837 wcstoll NEW: ISO C 9x
5838 wcstoull NEW: ISO C 9x
5839 wcstoumax NEW: ISO C 9x
5841 wordexp NEW: POSIX.2
5842 wordfree NEW: POSIX.2
5843 write_profiling REMOVED
5844 xdecrypt NEW: Secure RPC
5845 xdr_authdes_cred NEW: Secure RPC
5846 xdr_authdes_verf NEW: Secure RPC
5847 xdr_cryptkeyarg NEW: Secure RPC
5848 xdr_cryptkeyarg2 NEW: Secure RPC
5849 xdr_cryptkeyres NEW: Secure RPC
5850 xdr_getcredres NEW: Secure RPC
5851 xdr_key_netstarg NEW: Secure RPC
5852 xdr_key_netstres NEW: Secure RPC
5853 xdr_keybuf NEW: Secure RPC
5854 xdr_keystatus NEW: Secure RPC
5855 xdr_netnamestr NEW: Secure RPC
5856 xdr_sizeof NEW: Secure RPC
5857 xdr_unixcred NEW: sunrpc ext
5858 xencrypt NEW: Secure RPC
5859 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5870 * inet_ntoa is thread-safe
5872 * updwtmp is moved from libutil to libc
5874 * rewrite of cbrt function
5876 * update of timezone data
5890 * add atoll function
5892 * fix complex problems in Berkeley DB code
5894 * fix math functions
5898 * fixed lots of header problems (especially Linux/GNU specific)
5900 * dynamic loader preserves all registers
5902 * Roland McGrath provided support for handling of auxiliary objects in
5903 the ELF dynamic loader.
5905 * support for parallel builds is improved
5909 * GNU extensions are no longer declared by default. To enable them you
5910 must define the macro `_GNU_SOURCE' in your program or compile with
5913 * The library has changed from using GNU ld symbol aliases to using weak
5914 symbols where available. The ELF object file format supports weak
5915 symbols; GNU ld also supports weak symbols in the a.out format. (There
5916 is also now support for other GNU ld extensions in ELF. Use the
5917 `--with-elf' option to configure to indicate you have ELF, and
5918 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5919 of many files which contained only symbol aliases, reducing the size of
5920 the source and the compiled library; many other files were renamed to
5921 less cryptic names previously occupied by the symbol alias files.
5922 There is a new header file <elf.h> for programs which operate on
5923 files in the ELF format.
5925 * Converted to Autoconf version 2, so `configure' has more options.
5926 Run `configure --help' to see the details.
5928 * The library can now be configured to build profiling, highly-optimized
5929 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5930 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5931 `configure' enable building these extra libraries. The shared library is
5932 built by default when using both ELF and GNU ld. When shared libraries
5933 are enabled, the new library `-ldl' is available for arbitrary run-time
5934 loading of shared objects; its interface is defined in <dlfcn.h>. The
5935 new header file <link.h> gives access to the internals of the run-time
5936 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5937 application of same name on other systems and it provides information
5938 about dynamically linked binaries.
5940 * The C library now provides the run-time support code for profiling
5941 executables compiled with `-pg'. Programs can control the profiling code
5942 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5943 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5944 the support for this file format was contributed by David Mosberger-Tang.
5946 * The math code has been replaced with a math library based on fdlibm from
5947 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5948 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5949 functions. The math functions now reside in a separate library, so
5950 programs using them will need to use `-lm' their linking commands.
5952 * John C. Bowman contributed optimized ix87 assembler inline functions.
5954 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5955 mechanism similar to that found in Solaris 2. This is now used for the
5956 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5957 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5958 file controls what services are used for each individual database. This
5959 works by loading shared libraries with names specified in `nsswitch.conf',
5960 so service modules can be changed or added at any time without even
5961 relinking any program. Currently there are the file, db, and NIS based
5962 NSS services available.
5964 * The new functions `strtoq' and `strtouq' parse integer values from
5965 strings, like `strtol' and `strtoul', but they return `long long int' and
5966 `unsigned long long int' values, respectively (64-bit quantities).
5968 * The new functions `strtof' and `strtold' parse floating-point values from
5969 strings, like `strtod', but they return `float' and `long double' values,
5970 respectively (on some machines `double' and `long double' are the same).
5972 * Ulrich Drepper has contributed new implementations of the floating-point
5973 printing and reading code used in the `printf' family of functions and
5974 `strtod', `strtof', and `strtold'. These new functions are perfectly
5975 accurate, and much faster than the old ones.
5977 * The implementation of the POSIX locale model was completely rewritten by
5978 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5979 to compile the POSIX locale definition.
5981 * The former dummy implementations of the strcoll and strxfrm function are
5982 now replaced by fully functional code contributed by Ulrich Drepper. The
5983 collation information comes from the POSIX locale definitions.
5985 * The new header <langinfo.h> defines an interface for accessing
5986 various locale-dependent data (using the locale chosen with `setlocale').
5988 * Ulrich Drepper has contributed a new suite of functions for operation on
5989 wide-character and multibyte-character strings, in <wchar.h>;
5990 and classification and case conversion of wide characters, in <wctype.h>.
5991 These new functions are conforming to the ISO C, Amendement 1 specification.
5993 * There is now a second implementation of the standard I/O library available.
5994 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5995 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5997 * You can now use positional parameter specifications in format strings
5998 for the `printf' and `scanf' families of functions. For example,
5999 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
6000 ``Number 6, Mr Jones''. This is mainly useful when providing different
6001 format strings for different languages, whose grammars may dictate
6002 different orderings of the values being printed. To support this
6003 feature, the interface for `register_printf_handler' has changed; see
6004 the header file <printf.h> for details.
6006 * The `printf' and `scanf' families of functions now understand a new
6007 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
6008 to group numbers as indicated by the locale; for `scanf' and friends, this
6009 says to accept as valid only a number with all the proper grouping
6010 separators in the right places. In the default "C" locale, numbers are
6011 not grouped; but locales for specific countries will define the usual
6012 conventions (i.e. separate thousands with `,' in the US locale).
6014 * The pgrp functions have been regularized, slightly incompatibly but much
6015 less confusingly. The core functions are now `getpgid' and `setpgid',
6016 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
6017 argument) and BSD `setpgrp' (identical to `setpgid') functions are
6018 provided for compatibility. There is no longer an incompatible `getpgrp'
6019 with an argument declared under _BSD_SOURCE; no BSD code uses it.
6021 * The new header file <fts.h> and suite of functions simplify programs that
6022 operate on directory trees. This code comes from 4.4 BSD.
6024 * The resolver code has been updated from the BIND 4.9.5-P1 release.
6025 Parts of the code were heavily modified by Ulrich Drepper to fit in the
6026 NSS scheme used in glibc.
6028 * There is a new malloc debugging hook `__memalign_hook'.
6030 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
6031 `unsigned int' in <sys/types.h>. These are for compatibility only and
6032 their use is discouraged.
6034 * The `-lmcheck' library to enable standard malloc debugging hooks is now
6035 done differently, so that it works even without GNU ld.
6037 * New function `euidaccess' checks allowed access to a file like `access',
6038 but using the effective IDs instead of the real IDs.
6040 * The time zone data files have been updated for the latest and greatest
6041 local time conventions of the countries of the world.
6043 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
6046 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
6047 for formatting floating-point numbers. They are provided only for
6048 compatibility; new programs should use `sprintf' instead. There are
6049 also equivalent function for the `long double' floating-point type and
6050 all functions also exist in a reentrant form.
6052 * The new auxiliary library `-lutil' from 4.4 BSD contains various
6053 functions for maintaining the login-record files (primarily of use to
6054 system programs such as `login'), and convenient functions for
6055 allocating and initializing a pseudo-terminal (pty) device.
6057 * Ulrich Drepper has contributed new support for System V style
6058 shared memory and IPC on systems that support it.
6060 * Ulrich Drepper has contributed several miscellaneous new functions found
6061 in System V: The `hsearch' family of functions provide an effective
6062 implementation of hash tables; `a64l' and `l64a' provide a very simple
6063 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
6066 * Ulrich Drepper has contributed new reentrant counterparts for the
6067 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
6069 * Ulrich Drepper has contributed new, highly-optimized versions of several
6070 string functions for the i486/Pentium family of processors.
6072 * Ulrich Drepper has updated the Linux-specific code, based largely
6073 on work done in Hongjiu Lu's version of GNU libc for Linux.
6074 The GNU library now supports Linux versions 2.0.10 and later,
6075 using the ELF object file format (i[3456]86-*-linux).
6077 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
6079 * David Mosberger-Tang and Richard Henderson have ported the C library
6080 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
6081 dynamic linking support for ELF/Alpha.
6083 * Richard Henderson contributed several Alpha optimized assembler function
6084 for arithmetic and string handling.
6086 * Ulrich Drepper has contributed a new set of message catalog functions to
6087 support multiple languages using the <libintl.h> interface, for use with
6088 his new package GNU gettext. Translation volunteers have contributed
6089 catalogs of the library's messages in Spanish, German, and Korean.
6091 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
6092 program and the `catgets' function for reading the catalog files it
6093 creates. (The <libintl.h> interface is preferred; we include the
6094 <nl_types.h> interface using `catgets' only for source compatibility with
6095 programs already written to use it.)
6097 * New header file <values.h> gives SVID-compatible names for <limits.h>
6100 * Various new macros, declarations, and small header files for compatibility
6103 * New function `group_member' is a convenient way to check if a process has
6104 a given effective group ID.
6106 * When using GCC 2.7 and later, the socket functions are now declared in a
6107 special way so that passing an argument of type `struct sockaddr_in *',
6108 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
6109 `struct sockaddr *' type, does not generate a type-clash warning.
6111 * New function `error' declared in header file <error.h> is a convenient
6112 function for printing error messages and optionally exiting; this is the
6113 canonical function used in GNU programs. The new functions `err', `warn',
6114 and friends in header file <err.h> are the canonical 4.4 BSD interface for
6115 doing the same thing.
6117 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
6118 POSIX.2 `glob' function to do ~ and {...} expansion.
6120 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
6121 `clearenv' which is used in POSIX.9 is also available.
6123 * New function `getsid' returns session ID number on systems that support it.
6125 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
6126 files <db.h> and <mpool.h> provide a rich set of functions for several
6127 types of simple databases stored in memory and in files, and <ndbm.h> is
6128 an old `ndbm'-compatible interface using the `db' functions. Link with
6129 `-ldb' to get these functions.
6131 * New macro `strdupa' copies a string like `strdup', but uses local stack
6132 space from `alloca' instead of dynamic heap space from `malloc'.
6134 * New function `strnlen' is like `strlen' but searches only a given maximum
6135 number of characters for the null terminator. `stpncpy', `strndup' and
6136 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
6139 * New function `statfs' in header <sys/statfs.h>.
6141 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
6142 provide convenient functions for operating on blocks of null-terminated
6145 * A new suite of functions in <utmp.h> handle all the details of reading
6146 and writing the utmp file.
6148 * An implementation of the NIS/YP(tm) based NSS service was contributed by
6151 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
6152 completely POSIX compliant and also implemented the extended functionality
6153 to handle alternate digit representation and alternate era date formats.
6155 * Ulrich Drepper provided an implementation of the `strptime' function
6156 defined in XPG4.2 which transforms a string into a `struct tm' value.
6158 * Paul Eggert provided the tzselect shell script as part of the timezone
6159 code. The shell script makes it easy to select the correct timezone
6162 * The implementation of the malloc family of functions is completely replaced
6163 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
6164 The implementation uses the mmap function (if available) and it is
6165 optimized for the use in multi threaded programs.
6167 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
6168 functions. This new functionality is usable by specifying a special
6169 salt string and it is compatible with implementation on *BSD systems.
6171 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
6172 `getsubopt' to handle second level command line options, `bsd_signal'
6173 to access BSD style `signal' functionality, the obsolete `regexp' style
6176 * the `lchown' function is available on system which support this
6179 * The implementation of the shadow password handling function was contributed
6182 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
6184 * POSIX.1g support was added. The <sys/select.h> header is available,
6185 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
6186 implementation of `getaddrinfo'.
6190 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
6192 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
6193 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
6195 * The new function `daemon' from 4.4 BSD is useful for server programs that
6196 want to put themselves in the background.
6198 * Joel Sherrill has contributed support for several standalone boards that
6199 run without an operating system.
6201 * `printf', `scanf' and friends now accept a `q' type modifier for long
6202 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
6204 * All of the code taken from BSD (notably most of the math and networking
6205 routines) has been updated from the BSD 4.4-Lite release.
6207 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
6209 * The new functions `getdomainname' and `setdomainname' fetch or change the
6210 YP/NIS domain name. These are system calls which exist on systems which
6213 * The time zone data files have been updated for the latest international
6216 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
6217 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
6221 * The C library now includes support for Sun RPC, from Sun's free
6222 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
6223 are included. (There is still no support for YP.)
6225 * Tom Quinn has contributed a port of the C library to SGI machines running
6226 Irix 4 (mips-sgi-irix4).
6228 * The new `lockf' function is a simplified interface to the locking
6229 facilities of `fcntl', included for compatibility.
6231 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
6233 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
6235 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
6238 * The error message printed by `assert' for a failed assertion now includes
6239 the name of the program (if using GNU ld) and the name of the calling
6240 function (with versions of GCC that support this).
6242 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
6244 * The library now includes the <sys/mman.h> header file and memory
6245 management functions `mmap', `munmap', `mprotect', `msync', and
6246 `madvise', on systems that support those facilities.
6248 * The interface for `mcheck' has changed slightly: the function called to
6249 abort the program when an allocation inconsistency is detected now takes
6250 an argument that indicates the type of failure. The new function
6251 `mprobe' lets you request a consistency check for a particular block at
6252 any time (checks are normally done only when you call `free' or `realloc'
6255 * It is now possible to easily cross-compile the C library, building on one
6256 system a library to run on another machine and/or operating system. All
6257 you need to do is set the variable `HOST_CC' in `configparms' to the
6258 native compiler for programs to run on the machine you are building on (a
6259 few generator programs are used on Unix systems); set `CC' to the
6262 * The new function `fexecve' (only implemented on the GNU system) executes
6263 a program file given a file descriptor already open on the file.
6267 * Brendan Kehoe has contributed most of a port to the DEC Alpha
6268 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
6270 * You can set the variable `libprefix' in `configparms' to specify a prefix
6271 to be prepended to installed library files; this makes it easy to install
6272 the GNU C library to be linked as `-lgnuc' or whatever.
6274 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
6275 copies a limited number of characters from a string, and returns the
6276 address of the last character written.
6278 * You no longer need to check for whether the installed `stddef.h' is
6279 compatible with the GNU C library. configure now checks for you.
6281 * You can now define a per-stream `fileno' function to convert the
6282 stream's cookie into an integral file descriptor.
6284 * ``malloc (0)'' no longer returns a null pointer. Instead, it
6285 allocates zero bytes of storage, and returns a unique pointer which
6286 you can pass to `realloc' or `free'. The behavior is undefined if
6287 you dereference this pointer.
6289 * The C library now runs on Sony NEWS m68k machines running either
6290 NewsOS 3 or NewsOS 4.
6292 * The new `syscall' function is a system-dependent primitive function
6293 for invoking system calls. It has the canonical behavior on Unix
6294 systems, including unreliable return values for some calls (such as
6295 `pipe', `fork' and `getppid').
6297 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
6298 to `EAGAIN', which is the preferred name. On systems whose kernels
6299 use two distinct codes, the C library now translates EWOULDBLOCK to
6300 EAGAIN in every system call function.
6304 * The GNU C Library Reference Manual is now distributed with the library.
6305 `make dvi' will produce a DVI file of the printed manual.
6306 `make info' will produce Info files that you can read on line using C-h i
6307 in Emacs or the `info' program.
6308 Please send comments on the manual to bug-glibc-manual@gnu.org.
6310 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
6312 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
6314 * Jason Merrill has contributed a port to the Sequent Symmetry running
6315 Dynix version 3 (i386-sequent-dynix).
6317 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
6318 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
6320 * New function `memory_warnings' lets you arrange to get warnings when
6321 malloc is running out of memory to allocate, like Emacs gives you.
6323 * The C library now contains the relocating allocator used in Emacs 19 for
6324 its editing buffers. This allocator (ralloc) minimizes allocation
6325 overhead and fragmentation by moving allocated regions around whenever it
6326 needs to. You always refer to a ralloc'd region with a "handle" (a
6327 pointer to a pointer--an object of type `void **').
6329 * There is a new `printf' format: `%m' gives you the string corresponding
6330 to the error code in `errno'.
6332 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
6333 or `%[' conversion, but instead of filling in a fixed-sized buffer you
6334 pass, the `a' modifier says to fill in a `char **' you pass with a
6337 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
6338 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
6339 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
6341 * `mkstemp' is a traditional Unix function to atomically create and open a
6342 uniquely-named temporary file.
6346 * The standard location for the file that says what the local timezone is
6347 has changed again. It is now `/usr/local/etc/localtime' (or more
6348 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
6350 * The distribution no longer contains any files with names longer than 14
6353 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
6354 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
6356 * New functions `ttyslot' and `syslog' from 4.4 BSD.
6360 * The configuration process has changed quite a bit. The `configure'
6361 script is now used just like the configuration scripts for other GNU
6362 packages. The `sysdeps' directory hierarchy is much rearranged.
6363 The file `INSTALL' explains the new scheme in detail.
6365 * The header files no longer need to be processed into ANSI C and
6366 traditional C versions. There is just one set of files to install, and
6367 it will work with ANSI or old C compilers (including `gcc -traditional').
6369 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
6370 MIPS DECStation running Ultrix 4.
6372 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
6373 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
6374 made itself into a shared library.
6376 * Yet further improved support for the i386, running 4.3 BSD-like systems
6377 (such as Mach 3 with the Unix single-server), or System V.
6379 * New function `strncasecmp' to do case-insensitive string comparison
6380 with limited length.
6382 * New function `strsep' is a reentrant alternative to `strtok'.
6384 * New functions `scandir' and `alphasort' for searching directories.
6386 * New function `setenv' is a better interface to `putenv'.
6388 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
6389 function for traversing a directory tree.
6391 * The GNU obstack package is now also part of the C library.
6392 The new function `open_obstack_stream' creates a stdio stream that
6393 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
6394 formatted output directly to an obstack.
6396 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
6397 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
6399 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
6401 * The new functions `strfry' and `memfrob' do mysterious and wonderful
6402 things to your strings.
6404 * There are some new test programs: test-fseek, testmb, and testrand.
6406 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
6407 These ports are not finished, but are a good starting place for really
6408 supporting those systems.
6410 * `/etc/localtime' is now the standard location for the file that says what
6411 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
6412 This follows the general principle that `/etc' is the place for all local
6413 configuration files.
6415 * The C library header files now use `extern "C"' when used by the C++
6416 compiler, so the C library should now work with C++ code.
6418 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
6419 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
6422 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
6423 function which uses the `merge sort' algorithm, and is said to be
6424 significantly faster than the old GNU `qsort' function. Merge sort is
6425 now the standard `qsort' function. The new algorithm can require a lot
6426 of temporary storage; so, the old sorting function is called when the
6427 required storage is not available.
6429 * The C library now includes Michael Glad's Ultra Fast Crypt, which
6430 provides the Unix `crypt' function, plus some other entry points.
6432 * The code and header files taken from 4.4 BSD have been updated with the
6433 latest files released from Berkeley.
6435 ----------------------------------------------------------------------
6438 Permission is granted to anyone to make or distribute verbatim copies
6439 of this document as received, in any medium, provided that the
6440 copyright notice and this permission notice are preserved,
6441 thus giving the recipient permission to redistribute in turn.
6443 Permission is granted to distribute modified versions
6444 of this document, or of portions of it,
6445 under the above conditions, provided also that they
6446 carry prominent notices stating who last changed them.
6449 version-control: never