1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2020 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
13 * Support for the RISC-V ISA running on Linux has been expanded to run on
14 32-bit hardware. This is supported for the following ISA and ABI pairs:
20 The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils
23 Deprecated and removed features, and other changes affecting compatibility:
25 [Add deprecations, removals and changes affecting compatibility here]
27 Changes to build and runtime requirements:
29 [Add changes to build and runtime requirements here]
31 Security related changes:
33 [Add security related changes here]
35 The following bugs are resolved with this release:
37 [The release manager will add the list generated by
38 scripts/list-fixed-bugs.py just before the release.]
45 * Unicode 13.0.0 Support: Character encoding, character type info, and
46 transliteration tables are all updated to Unicode 13.0.0, using
47 generator scripts contributed by Mike FABIAN (Red Hat).
49 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
51 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
52 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
53 Three ABIs are supported:
59 The arc* ABI is little-endian while arceb is big-endian. All ABIs use
60 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
62 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
63 DT_DEPAUDIT dynamic section entries of the main executable.
65 * powerpc64le supports IEEE128 long double libm/libc redirects when
66 using the -mabi=ieeelongdouble to compile C code on supported GCC
67 toolchains. It is recommended to use GCC 8 or newer when testing
70 * To help detect buffer overflows and other out-of-bounds accesses
71 several APIs have been annotated with GCC 'access' attribute. This
72 should help GCC 10 issue better warnings.
74 * On Linux, functions the pthread_attr_setsigmask_np and
75 pthread_attr_getsigmask_np have been added. They allow applications
76 to specify the signal mask of a thread created with pthread_create.
78 * The GNU C Library now provides the header file <sys/single_threaded.h>
79 which declares the variable __libc_single_threaded. Applications are
80 encouraged to use this variable for single-thread optimizations,
81 instead of weak references to symbols historically defined in
84 * The functions sigabbrev_np and sigdescr_np have been added. The
85 sigabbrev_np returns the abbreviated signal name (e.g. "HUP" for SIGHUP)
86 while sigdescr_np returns a string describing the signal number (e.g
87 "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
88 attempt to translate the return description, both functions return
89 NULL for an invalid signal number.
91 They should be used instead of sys_siglist or sys_sigabbrev and they
92 are both thread and async-signal safe. These functions are GNU extensions.
94 * The functions strerrorname_np and strerrordesc_np have been added. The
95 strerroname_np returns error number name (e.g. "EINVAL" for EINVAL) while
96 strerrordesc_np returns string describing error number
97 (e.g "Invalid argument" for EINVAL). Different than strerror,
98 strerrordesc_np does not attempt to translate the return description, both
99 functions return NULL for an invalid error number.
101 They should be used instead of sys_errlist and sys_nerr, both are
102 thread and async-signal safe. These functions are GNU extensions.
104 * AArch64 now supports standard branch protection security hardening
105 in glibc when it is built with a GCC that is configured with
106 --enable-standard-branch-protection (or if -mbranch-protection=standard
107 flag is passed when building both GCC target libraries and glibc,
108 in either case a custom GCC is needed). This includes branch target
109 identification (BTI) and pointer authentication for return addresses
110 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
111 extensions respectively for the protection to be effective,
112 otherwise the used instructions are nops. User code can use PAC-RET
113 without libc support, but BTI requires a libc that is built with BTI
114 support, otherwise runtime objects linked into user code will not be
117 Deprecated and removed features, and other changes affecting compatibility:
119 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
120 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
121 RPC header files. Backward compatibility for old programs is kept
122 only for architectures and ABIs that have been added in or before
123 glibc 2.31. New programs need to use TI-RPC
124 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
125 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
127 * Remove configure option --enable-obsolete-nsl. libnsl is only built
128 as shared library for backward compatibility and the NSS modules "nis"
129 and "nisplus" are not built at all and libnsl's headers aren't
130 installed. This compatibility is kept only for architectures and ABIs
131 that have been added in or before version 2.28. Replacement
132 implementations based on TI-RPC, which additionally support IPv6, are
133 available from <https://github.com/thkukuk/>. This change does not
134 affect the "compat" NSS module, which does not depended on libnsl
135 since 2.27 and thus can be used without NIS.
137 * The deprecated <sys/sysctl.h> header and the sysctl function have been
138 removed. To support old binaries, the sysctl function continues to
139 exist as a compatibility symbol (on those architectures which had it),
140 but always fails with ENOSYS. This reflects the removal of the system
141 call from all architectures, starting with Linux 5.5.
143 * The sstk function is no longer available to newly linked binaries.
144 Its implementation always returned with a failure, and the function
145 was not declared in any header file.
147 * The legacy signal handling functions siginterrupt, sigpause, sighold,
148 sigrelse, sigignore and sigset, and the sigmask macro have been
149 deprecated. Applications should use the sigsuspend, sigprocmask and
150 sigaction functions instead.
152 * ldconfig now defaults to the new format for ld.so.cache. glibc has
153 already supported this format for almost 20 years.
155 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
156 are no longer available to newly linked binaries, and their declarations
157 have been removed from <string.h>. They are exported solely as
158 compatibility symbols to support old binaries. All programs should use
161 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
162 are no longer available to newly linked binaries, and their declarations
163 have been removed from from <stdio.h>. They are exported solely as
164 compatibility symbols to support old binaries. All programs should use
165 strerror or strerror_r instead.
167 * Both strerror and strerror_l now share the same internal buffer in the
168 calling thread, meaning that the returned string pointer may be invalided
169 or contents might be overwritten on subsequent calls in the same thread or
170 if the thread is terminated. It makes strerror MT-safe.
172 * Using weak references to libpthread functions such as pthread_create
173 or pthread_key_create to detect the singled-threaded nature of a
174 program is an obsolescent feature. Future versions of glibc will
175 define pthread_create within libc.so.6 itself, so such checks will
176 always flag the program as multi-threaded. Applications should check
177 the __libc_single_threaded variable declared in
178 <sys/single_threaded.h> instead.
180 * The "files" NSS module no longer supports the "key" database (used for
181 secure RPC). The contents of the /etc/publickey file will be ignored,
182 regardless of the settings in /etc/nsswitch.conf. (This method of
183 storing RPC keys only supported the obsolete and insecure AUTH_DES
184 flavor of secure RPC.)
186 * The __morecore and __after_morecore_hook malloc hooks and the default
187 implementation __default_morecore have been deprecated. Applications
188 should use malloc interposition to change malloc behavior, and mmap to
189 allocate anonymous memory. A future version of glibc may require that
190 applications which use the malloc hooks must preload a special shared
191 object, to enable the hooks.
193 * The hesiod NSS module has been deprecated and will be removed in a
194 future version of glibc. System administrators are encouraged to
195 switch to other approaches for networked account databases, such as
198 Changes to build and runtime requirements:
200 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
201 long double redirects.
203 Security related changes:
205 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
206 invoked with the -c option and when processing invalid multi-byte input
207 sequences. Reported by Jan Engelhardt.
209 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
210 corruption when they were passed a pseudo-zero argument. Reported by Guido
211 Vranken / ForAllSecure Mayhem.
213 CVE-2020-1752: A use-after-free vulnerability in the glob function when
214 expanding ~user has been fixed.
216 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
217 memmove functions has been fixed. Discovered by Jason Royes and Samual
218 Dytrych of the Cisco Security Assessment and Penetration Team (See
221 The following bugs are resolved with this release:
223 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
224 [10441] manual: Backtraces code example lacks error checking
225 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
226 timer_sigev_thread dangerous
227 [14231] stdio: stdio-common tests memory requirements
228 [14578] libc: /proc-based emulation for lchmod, fchmodat
229 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
230 filtee has constructor
231 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
232 sequences (CVE-2016-10228)
233 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
234 character entities for infinity & pi
235 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
236 segfaults in applications
237 [20543] libc: Please move from .gnu.linkonce to comdat
238 [22489] network: gcc warns about implicit convertion in
239 ICMP6_FILTER_SETPASS with -Wsign-conversion
240 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
241 [23294] math: Complex _FloatN functions are redirected to the wrong
242 function with -mlong-double-64
243 [23296] libc: Data race in setting function descriptor during lazy
245 [23668] dynamic-link: ldconfig: Default to the new format for
247 [23819] hurd: hurd: Add C11 thread support
248 [23990] build: test-container error out on failure to exec child.
249 [23991] build: shell-container typo in run_command_array
250 [24638] manual: Error in example of parsing a template string
251 [24654] manual: Wrong declaration of wcschr in libc manual
252 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
254 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
255 dynamically loaded dsos
256 [25098] nptl: nptl: ctype classification functions are not AS-Safe
257 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
259 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
260 restore EAX, ECX and EDX
261 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
262 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
263 [25420] network: Race condition in resolv_conf.c can result in caching
264 stale configuration forever
265 [25487] math: sinl() stack corruption from crafted input
267 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
269 [25523] libc: MIPS/Linux inline syscall template is miscompiled
270 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
272 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
273 on 32 bit and old kernel
274 [25635] libc: arm: Wrong sysdep order selection for soft-fp
275 [25639] localedata: Some names of days and months wrongly spelt in
277 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
278 amount of sigset_t bytes
279 [25691] stdio: printf: memory leak when printing long multibyte
281 [25715] libc: system() returns wrong errors when posix_spawn fails
282 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
283 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
284 state for conversions that produce two Unicode code points
285 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
286 for linux x86_64 leads to livelock
287 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
288 test failures, invalid instruction in ld.so
289 [25790] glob: Typo in tst-fnmatch.input
290 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
292 [25819] localedata: Update locale data to Unicode 13.0.0
293 [25824] libc: Abnormal function of strnlen in aarch64
294 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
295 [25896] libc: Incorrect prctl
296 [25902] libc: Bad LOADARGS_N
297 [25905] dynamic-link: VSX registers are corrupted during PLT
298 resolution when glibc is built with --disable-multi-arch and --with-
300 [25933] string: Off by one error in __strncmp_avx2 when
301 length=VEC_SIZE*4 and strings are at page boundaries can cause a
303 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
304 exiting detached thread
305 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
307 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
309 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
310 [26073] math: getpayload() has wrong return value
311 [26076] dynamic-link: dlmopen crashes after failing to load
312 dependencies in audit mode
313 [26120] localedata: column width of of some Korean
314 JUNGSEONG/JONGSEONG characters wrong (should be 0)
315 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
316 [26133] libc: Incorrect need_arch_feature_F16C
317 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
319 [26149] libc: PKU is usable only if OSPKE is set
320 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
322 [26208] libc: Incorrect bit_cpu_CLFSH
323 [26210] network: Incorrect use of hidden symbols for global sunrpc
325 [26211] stdio: printf integer overflow calculating allocation size
326 [26214] stdio: printf_fp double free
327 [26215] stdio: printf_fp memory leak
328 [26232] time: FAIL: support/tst-timespec for 32-bit targets
329 [26258] nss: nss_compat should not read input files with mmap
330 [26332] string: Incorrect cache line size load causes memory
338 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
339 enable features from the draft ISO C2X standard. Only some features from
340 this draft standard are supported by the GNU C Library, and as the draft
341 is under active development, the set of features enabled by this macro is
342 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
343 by compiling with "gcc -std=gnu2x".
345 * The <math.h> functions that round their results to a narrower type now
346 have corresponding type-generic macros in <tgmath.h>, as defined in TS
347 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
348 Clarification Request 13 to TS 18661-3.
350 * The function pthread_clockjoin_np has been added, enabling join with a
351 terminated thread with a specific clock. It allows waiting against
352 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
354 * New locale added: mnw_MM (Mon language spoken in Myanmar).
356 * The DNS stub resolver will optionally send the AD (authenticated data) bit
357 in queries if the trust-ad option is set via the options directive in
358 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
359 mode, the AD bit, as provided by the name server, is available to
360 applications which call res_search and related functions. In the default
361 mode, the AD bit is not set in queries, and it is automatically cleared in
362 responses, indicating a lack of DNSSEC validation. (Therefore, the name
363 servers and the network path to them are treated as untrusted.)
365 Deprecated and removed features, and other changes affecting compatibility:
367 * The totalorder and totalordermag functions, and the corresponding
368 functions for other floating-point types, now take pointer arguments to
369 avoid signaling NaNs possibly being converted to quiet NaNs in argument
370 passing. This is in accordance with the resolution of Clarification
371 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
372 floating-point arguments directly will continue to work.
374 * The obsolete function stime is no longer available to newly linked
375 binaries, and its declaration has been removed from <time.h>.
376 Programs that set the system time should use clock_settime instead.
378 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
379 in a future version of glibc. In this release, the header still exists
380 but calling ftime will cause a compiler warning. All programs should use
381 gettimeofday or clock_gettime instead.
383 * The gettimeofday function no longer reports information about a
384 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
385 many years, as it cannot handle the full complexity of the world's
386 timezones, but hitherto we have supported it on a best-effort basis.
387 Changes required to support 64-bit time_t on 32-bit architectures have
388 made this no longer practical.
390 As of this release, callers of gettimeofday with a non-null 'tzp' argument
391 should expect to receive a 'struct timezone' whose tz_minuteswest and
392 tz_dsttime fields are zero. (For efficiency reasons, this does not always
393 happen on a few Linux-based ports. This will be corrected in a future
396 All callers should supply a null pointer for the 'tzp' argument to
397 gettimeofday. For accurate information about the time zone associated
398 with the current time, use the localtime function.
400 gettimeofday itself is obsolescent according to POSIX. We have no plans
401 to remove access to this function, but portable programs should consider
402 using clock_gettime instead.
404 * The settimeofday function can still be used to set a system-wide time
405 zone when the operating system supports it. This is because the Linux
406 kernel reused the API, on some architectures, to describe a system-wide
407 time-zone-like offset between the software clock maintained by the kernel,
408 and the "RTC" clock that keeps time when the system is shut down.
410 However, to reduce the odds of this offset being set by accident,
411 settimeofday can no longer be used to set the time and the offset
412 simultaneously. If both of its two arguments are non-null, the call
413 will fail (setting errno to EINVAL).
415 Callers attempting to set this offset should also be prepared for the call
416 to fail and set errno to ENOSYS; this already happens on the Hurd and on
417 some Linux architectures. The Linux kernel maintainers are discussing a
418 more principled replacement for the reused API. After a replacement
419 becomes available, we will change settimeofday to fail with ENOSYS on all
420 platforms when its 'tzp' argument is not a null pointer.
422 settimeofday itself is obsolescent according to POSIX. Programs that set
423 the system time should use clock_settime and/or the adjtime family of
424 functions instead. We may cease to make settimeofday available to newly
425 linked binaries after there is a replacement for Linux's time-zone-like
428 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
429 the optional CAS instruction is implemented (for instance, LEON processors
430 are still supported, but SuperSPARC processors are not).
432 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
435 * If a lazy binding failure happens during dlopen, during the execution of
436 an ELF constructor, the process is now terminated. Previously, the
437 dynamic loader would return NULL from dlopen, with the lazy binding error
438 captured in a dlerror message. In general, this is unsafe because
439 resetting the stack in an arbitrary function call is not possible.
441 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
442 executable stack unless explicitly configured at build time to require
443 minimum kernel version 4.8 or newer. This is because executing
444 floating-point branches on a non-executable stack on Linux kernels prior to
445 4.8 can lead to application crashes for some MIPS configurations. While
446 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
447 expected to enable non-executable stack by default with PT_GNU_STACK by
448 default and is thus likely to trigger a crash on older kernels.
450 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
451 non-executable stack while dropping support for older kernels.
453 * System call wrappers for time system calls now use the new time64 system
454 calls when available. On 32-bit targets, these wrappers attempt to call
455 the new system calls first and fall back to the older 32-bit time system
456 calls if they are not present. This may cause issues in environments
457 that cannot handle unsupported system calls gracefully by returning
458 -ENOSYS. Seccomp sandboxes are affected by this issue.
460 Changes to build and runtime requirements:
462 * It is no longer necessary to have recent Linux kernel headers to build
463 working (non-stub) system call wrappers on all architectures except 64-bit
464 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
466 * The ChangeLog file is no longer present in the toplevel directory of the
467 source tree. ChangeLog files are located in the ChangeLog.old directory as
468 ChangeLog.N where the highest N has the latest entries.
470 Security related changes:
472 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
473 out-of-bounds write when executed in a signal frame context.
475 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
476 environment variable during program execution after a security
477 transition, allowing local attackers to restrict the possible mapping
478 addresses for loaded libraries and thus bypass ASLR for a setuid
479 program. Reported by Marcin Kościelnicki.
481 The following bugs are resolved with this release:
483 [12031] localedata: iconv -t ascii//translit with Greek characters
484 [15813] libc: Multiple issues in __gen_tempname
485 [17726] libc: [arm, sparc] profil_counter should be compat symbol
486 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
487 [19767] libc: vdso is not used with static linking
488 [19903] hurd: Shared mappings not being inherited by children processes
489 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
490 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
492 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
493 Symbols-A/B Unicode blocks
494 [23518] libc: Eliminate __libc_utmp_jump_table
495 [24026] malloc: malloc_info() returns wrong numbers
496 [24054] localedata: Many locales are missing date_fmt
497 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
498 [24304] dynamic-link: Lazy binding failure during ELF
499 constructors/destructors is not fatal
500 [24376] libc: RISC-V symbol size confusion with _start
501 [24682] localedata: zh_CN first weekday should be Monday per GB/T
503 [24824] libc: test-in-container does not install charmap files compatible
505 [24844] regex: regex bad pointer / leakage if malloc fails
506 [24867] malloc: Unintended malloc_info formatting changes
507 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
508 [24880] libc: login: utmp implementation uses struct flock with fcntl64
509 [24882] libc: login: pututline uses potentially outdated cache
510 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
511 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
513 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
515 [24930] dynamic-link: dlopen of PIE executable can result in
516 _dl_allocate_tls_init assertion failure
517 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
518 (stringop-overflow error)
519 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
520 functions other can lead to crashes
521 [24967] libc: jemalloc static linking causes runtime failure
522 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
524 [25035] libc: sbrk() failure handled poorly in tunables_strdup
525 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
526 [25097] libc: new -Warray-bounds with GCC 10
527 [25112] dynamic-link: dlopen must not make new objects accessible when it
528 still can fail with an error
529 [25139] localedata: Please add the new mnw_MM locale
530 [25149] regex: Array bounds violation in proceed_next_node
531 [25157] dynamic-link: Audit cookie for the dynamic loader is not
532 initialized correctly
533 [25189] libc: glibc's __glibc_has_include causes issues with clang
535 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
537 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
538 binaries (CVE-2019-19126)
539 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
541 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
543 [25232] string: <string.h> does not enable const correctness for strchr et
545 [25233] localedata: Consider "." as the thousands separator for sl_SI
547 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
548 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
549 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
551 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
552 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
554 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
555 (dl_initfirst) link map pointer
556 [25401] malloc: pvalloc must not have __attribute_alloc_size__
557 [25423] libc: Array overflow in backtrace on powerpc
558 [25425] network: Missing call to __resolv_context_put in
559 getaddrinfo.c:gethosts
566 * Unicode 12.1.0 Support: Character encoding, character type info, and
567 transliteration tables are all updated to Unicode 12.1.0, using
568 generator scripts contributed by Mike FABIAN (Red Hat).
570 * The dynamic linker accepts the --preload argument to preload shared
571 objects, in addition to the LD_PRELOAD environment variable.
573 * The twalk_r function has been added. It is similar to the existing
574 twalk function, but it passes an additional caller-supplied argument
575 to the callback function.
577 * On Linux, the getdents64, gettid, and tgkill functions have been added.
579 * Minguo (Republic of China) calendar support has been added as an
580 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
583 * The entry for the new Japanese era has been added for ja_JP locale.
585 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
586 pvalloc, memalign, and posix_memalign fail now with total object size
587 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
588 pointer subtraction within the allocated object, where results might
589 overflow the ptrdiff_t type.
591 * The dynamic linker no longer refuses to load objects which reference
592 versioned symbols whose implementation has moved to a different soname
593 since the object has been linked. The old error message, symbol
594 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
595 link time reference, is gone.
597 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
598 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
599 functions. These behave similarly to their "timed" equivalents, but also
600 accept a clockid_t parameter to determine which clock their timeout should
601 be measured against. All functions allow waiting against CLOCK_MONOTONIC
602 and CLOCK_REALTIME. The decision of which clock to be used is made at the
603 time of the wait (unlike with pthread_condattr_setclock, which requires
604 the clock choice at initialization time).
606 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
607 work, new resolvers can use a second argument which can be extended in
608 the future, currently it contains the AT_HWCAP2 value.
610 Deprecated and removed features, and other changes affecting compatibility:
612 * The copy_file_range function fails with ENOSYS if the kernel does not
613 support the system call of the same name. Previously, user space
614 emulation was performed, but its behavior did not match the kernel
615 behavior, which was deemed too confusing. Applications which use the
616 copy_file_range function can no longer rely on glibc to provide a fallback
617 on kernels that do not support the copy_file_range system call, and if
618 this function returns ENOSYS, they will need to use their own fallback.
619 Support for copy_file_range for most architectures was added in version
620 4.5 of the mainline Linux kernel.
622 * The functions clock_gettime, clock_getres, clock_settime,
623 clock_getcpuclockid, clock_nanosleep were removed from the librt library
624 for new applications (on architectures which had them). Instead, the
625 definitions in libc will be used automatically, which have been available
628 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
629 and <sys/stropts.h> have been removed.
631 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
632 resolver flag (deprecated in glibc 2.25) have been removed.
634 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
635 resolver have been removed from <resolv.h>.
637 * With --enable-bind-now, installed programs are now linked with the
640 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
641 configurations) has been removed, following the deprecation of this
642 subarchitecture in version 8 of GCC, and its removal in version 9.
644 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
645 header have been removed.
647 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
648 deprecated and will be removed from a future version of glibc.
649 Application should directly access /proc instead. For obtaining random
650 bits, the getentropy function can be used.
652 Changes to build and runtime requirements:
654 * GCC 6.2 or later is required to build the GNU C Library.
656 Older GCC versions and non-GNU compilers are still supported when
657 compiling programs that use the GNU C Library.
659 Security related changes:
661 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
662 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
663 has undefined behavior. On x32, the size_t argument may be passed
664 in the lower 32 bits of the 64-bit RDX register with non-zero upper
665 32 bits. When it happened with the sign bit of RDX register set,
666 memcmp gave the wrong result since it treated the size argument as
667 zero. Reported by H.J. Lu.
669 CVE-2019-9169: Attempted case-insensitive regular-expression match
670 via proceed_next_node in posix/regexec.c leads to heap-based buffer
671 over-read. Reported by Hongxu Chen.
673 The following bugs are resolved with this release:
675 [2872] locale: Transliteration Cyrillic -> ASCII fails
676 [6399] libc: gettid() should have a wrapper
677 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
678 [16976] glob: fnmatch unbounded stack VLA for collating symbols
679 [17396] localedata: globbing for locale by [[.collating-element.]]
680 [18035] dynamic-link: pldd does no longer work, enters infinite loop
681 [18465] malloc: memusagestat is built using system C library
682 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
683 invalid input drops valid char
684 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
685 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
686 [21897] localedata: Afar locales: Fix mon, abmon, and abday
687 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
688 [23352] malloc: __malloc_check_init still defined in public header
690 [23403] nptl: Wrong alignment of TLS variables
691 [23501] libc: nftw() doesn't return dangling symlink's inode
692 [23733] malloc: Check the count before calling tcache_get()
693 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
695 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
696 [23844] nptl: pthread_rwlock_trywrlock results in hang
697 [23983] argparse: Missing compat versions of argp_failure and argp_error
698 for long double = double
699 [23984] libc: Missing compat versions of err.h and error.h functions for
701 [23996] localedata: Dutch salutations
702 [24040] libc: riscv64: unterminated call chain in __thread_start
703 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
705 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
706 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
708 [24114] regex: regexec buffer read overrun in "grep -i
709 '\(\(\)*.\)*\(\)\(\)\1'"
710 [24122] libc: Segfaults if 0 returned from la_version
711 [24153] stdio: Some input functions do not react to stdin assignment
712 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
713 RDX is set) (CVE-2019-7309)
714 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
715 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
716 not the default "nor"
717 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
718 false positives, change to modern flexible array
719 [24180] nptl: pthread_mutex_trylock does not use the correct order of
720 instructions while maintaining the robust mutex list due to missing
722 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
723 unnecessary librt dependencies
724 [24200] localedata: Revert first_weekday removal in en_IE locale
725 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
726 [24215] nptl: pthread_timedjoin_np should be a cancellation point
727 [24216] malloc: Check for large bin list corruption when inserting
729 [24228] stdio: old x86 applications that use legacy libio crash on exit
730 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
732 [24293] localedata: Missing Minguo calendar support for TW locales
733 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
735 [24307] localedata: Update locale data to Unicode 12.0.0
736 [24323] dynamic-link: dlopen should not be able open PIE objects
737 [24335] build: "Obsolete types detected" with Linux 5.0 headers
738 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
740 [24370] localedata: Add lang_name for tt_RU locale
741 [24372] locale: Binary locale files are not architecture independent
742 [24394] time: strptime %Ey mis-parses final year of era
743 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
745 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
747 [24531] malloc: Malloc tunables give tcache assertion failures
748 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
750 [24535] localedata: Update locale data to Unicode 12.1.0
751 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
752 kernels and break testing
753 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
754 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
755 [-Werror=format-overflow=]
756 [24570] libc: alpha: compat msgctl uses __IPC_64
757 [24584] locale: Data race in __wcsmbs_clone_conv
758 [24588] stdio: Remove codecvt vtables from libio
759 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
761 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
762 [24632] stdio: Old binaries which use freopen with default stdio handles
764 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
766 [24652] localedata: szl_PL spelling correction
767 [24695] nss: nss_db: calling getpwent after endpwent crashes
768 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
769 in /etc/nsswitch.conf
770 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
771 [24740] libc: getdents64 type confusion
772 [24741] dynamic-link: ld.so should not require that a versioned symbol is
773 always implemented in the same library
774 [24744] libc: Remove copy_file_range emulation
775 [24757] malloc: memusagestat is linked against system libpthread
776 [24794] libc: Partial test suite run builds corrupt test-in-container
784 * The getcpu wrapper function has been added, which returns the currently
785 used CPU and NUMA node. This function is Linux-specific.
787 * A new convenience target has been added for distribution maintainers
788 to build and install all locales as directories with files. The new
789 target is run by issuing the following command in your build tree:
790 'make localedata/install-locale-files', with an optional DESTDIR
791 to set the install root if you wish to install into a non-default
794 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
796 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
797 for _GNU_SOURCE, to match BSD environments.
799 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
800 indicates that it will abort the transaction prior to entering the kernel
801 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
802 suspended, and this caused some undefined side-effects issues by aborting
803 transactions manually. Glibc avoided it by abort transactions manually on
804 each syscall, but it lead to performance issues on newer kernels where the
805 HTM state is saved and restore lazily (the state being saved even when the
806 process actually does not use HTM).
808 * The functions posix_spawn_file_actions_addchdir_np and
809 posix_spawn_file_actions_addfchdir_np have been added, enabling
810 posix_spawn and posix_spawnp to run the new process in a different
811 directory. These functions are GNU extensions. The function
812 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
815 * The popen and system do not run atfork handlers anymore (BZ#17490).
816 Although it is a possible POSIX violation, the POSIX rationale in
817 pthread_atfork documentation regarding atfork handlers is to handle
818 inconsistent mutex state after a fork call in a multi-threaded process.
819 In both popen and system there is no direct access to user-defined mutexes.
821 * Support for the C-SKY ABIV2 running on Linux has been added. This port
822 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
824 - C-SKY ABIV2 soft-float little-endian
825 - C-SKY ABIV2 hard-float little-endian
827 * strftime's default formatting of a locale's alternative year (%Ey)
828 has been changed to zero-pad the year to a minimum of two digits,
829 like "%y". This improves the display of Japanese era years during
830 the first nine years of a new era, and is expected to be harmless
831 for all other locales (only Japanese locales regularly have
832 alternative year numbers less than 10). Zero-padding can be
833 overridden with the '_' or '-' flags (which are GNU extensions).
835 * As a GNU extension, the '_' and '-' flags can now be applied to
836 "%EY" to control how the year number is formatted; they have the
837 same effect that they would on "%Ey".
839 Deprecated and removed features, and other changes affecting compatibility:
841 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
842 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
844 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
845 in <sys/procfs.h>, has been corrected to match the type actually used by
846 the Linux kernel. This affects the size and layout of that structure on
847 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
849 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
850 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
851 defined in <sys/procfs.h>, has been corrected to match the type actually
852 used by the Linux kernel. This affects the size and layout of those
855 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
856 meant to scan a string and allocate space for it with malloc, is now
857 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
858 defined. This extension conflicts with C99's use of '%a' to scan a
859 hexadecimal floating-point number, which is now available to programs
860 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
862 POSIX.1-2008 includes the feature of allocating a buffer for string input
863 with malloc, using the modifier letter 'm' instead. Programs using
864 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
865 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
866 C99 '%a' no longer need to avoid _GNU_SOURCE.
868 GCC's -Wformat warnings can detect most uses of this extension, as long
869 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
870 __attribute__ ((format (scanf, ...))).
872 Changes to build and runtime requirements:
874 * Python 3.4 or later is required to build the GNU C Library.
876 * On most architectures, GCC 5 or later is required to build the GNU C
877 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
879 Older GCC versions and non-GNU compilers are still supported when
880 compiling programs that use the GNU C Library.
882 Security related changes:
884 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
885 denial of service due to resource exhaustion when processing getaddrinfo
886 calls with crafted host names. Reported by Guido Vranken.
888 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
889 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
890 happened, accessing the 32-bit size_t value as the full 64-bit register
891 in the assembly string/memory functions would cause a buffer overflow.
894 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
895 addresses with arbitrary trailing characters, potentially leading to data
896 or command injection issues in applications.
898 The following bugs are resolved with this release:
900 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
901 [10496] localedata: 12h time representation in multiple locales faulty
902 [10797] localedata: it_IT locale numeric does not have a separator for
904 [11319] libc: dprintf doesn't handle errors properly
905 [16346] time: mktime: potentially unsafe use of localtime_offset
906 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
908 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
909 posix_spawn_file_actions_addfchdir_np
910 [17426] localedata: Indian locales: set the correct date format
911 [17490] stdio: popen should not invoke atfork handlers
912 [17783] libc: TIOCSER_TEMT conditions inconsistent
913 [18040] regex: use-after-free in regexec/get_subexp
914 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
915 [20018] network: getaddrinfo should reject IP addresses with trailing
916 characters (CVE-2016-10739)
917 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
918 [20271] libc: Missing "\n" in __libc_fatal calls
919 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
920 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
921 pointer argument is non-NULL
922 [21037] stdio: open_memstream and freopen
923 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
924 [21716] time: Crash in glibc's mktime in low-memory situations
925 [22834] stdio: Subprocess forked by popen may crash in Linux when
926 multithreads call popen
927 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
928 and pthread_create fails.
929 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
930 [23125] libc: riscv64: endless loop when throwing an exception from a
932 [23275] nptl: Race in pthread_mutex_lock while promoting to
933 PTHREAD_MUTEX_ELISION_NP.
934 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
936 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
938 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
940 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
941 [23509] dynamic-link: CET enabled glibc is incompatible with the older
943 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
944 [23521] nss: get_next_alias nss_files file stream leak
945 [23538] nptl: Hang in pthread_cond_broadcast
946 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
947 [23578] regex: Invalid memory access if regex pattern contains NUL byte
948 [23579] libc: Errors misreported in preadv2
949 [23597] build: support/test-container.c doesn't work with different
951 [23603] time: mktime signed integer overflow on large timestamps
952 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
953 [23614] libc: powerpc: missing CFI register information in __mpn_*
955 [23637] string: Generic strstr/strcasestr fails with huge needles
956 [23640] libc: no way to easily clear FD_CLOEXEC in
957 posix_spawn_file_actions_adddup2()
958 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
960 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
962 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
963 [23689] libc: Bug in documentation for rusage.ru_ixrss in
964 bits/types/struct_rusage.h
965 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
967 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
969 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
970 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
971 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
973 [23724] localedata: Albanian date formats are incorrect
974 [23735] math: libnldbl_nonshared.a references internal libm symbols
975 [23740] localedata: kl_GL: Month names and date formats need update
976 [23744] regex: regex refactorings to remove BE, avoid duplication
977 [23745] time: mktime fix for Gnulib + coreutils
978 [23758] time: Improve the width of alternate representation for year in
980 [23783] libc: [mips] Missing CMSPAR bits/termios.h
981 [23789] time: mktime does not set errno on failure
982 [23791] localedata: Wrong monetary format for ca_ES locale
983 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
984 [23794] locale: c16rtomb does not handle surrogate pairs
985 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
986 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
987 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
988 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
989 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
990 [23862] libc: [sh] missing kernel-features.h undefines
991 [23864] libc: [riscv] missing kernel-features.h undefines
992 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
993 [23907] malloc: Incorrect double-free malloc tcache check disregards
995 [23913] libc: off-by-one in function maybe_script_execute in
996 sysdeps/posix/spawni.c
997 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
998 [23923] locale: Add --no-hard-links option to localedef
999 [23927] network: Linux if_nametoindex() does not close descriptor
1001 [23961] math: powf can overflow to inf without setting errno in non-
1002 nearest rounding mode
1003 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
1004 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
1005 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
1006 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
1007 [24011] localedata: Fixed small type in comment for locale bs_BA
1008 [24018] libc: gettext() may return NULL
1009 [24022] build: riscv build failure with Linux kernel 4.20-rc7
1010 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
1011 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
1013 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
1014 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
1016 [24046] localedata: en_US locale doesn't define date_fmt
1017 [24063] manual: @var{errno} should be @code{errno}
1018 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
1019 [24088] libc: VSCR field is not being correctly read in ucontext_t on
1021 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
1023 [24097] string: Can't use 64-bit register for size_t in assembly codes for
1025 [24110] hurd: SS_DISABLE never set in stack_t value returned by
1027 [24112] network: Do not send DNS queries for non-host names (where all
1028 answers will be rejected)
1029 [24130] libc: alpha __remqu corrupts $f3 register
1036 * The localization data for ISO 14651 is updated to match the 2016
1037 Edition 4 release of the standard, this matches data provided by
1038 Unicode 9.0.0. This update introduces significant improvements to the
1039 collation of Unicode characters. This release deviates slightly from
1040 the standard in that the collation element ordering for lowercase and
1041 uppercase LATIN script characters is adjusted to ensure that regular
1042 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
1043 is not matched by [a-z]. With the update many locales have been
1044 updated to take advantage of the new collation information. The new
1045 collation information has increased the size of the compiled locale
1046 archive or binary locales.
1048 * The GNU C Library can now be compiled with support for Intel CET, AKA
1049 Intel Control-flow Enforcement Technology. When the library is built
1050 with --enable-cet, the resulting glibc is protected with indirect
1051 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
1052 compatible with all existing executables and shared libraries. This
1053 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
1054 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
1055 capable of multi-byte NOPs, like x86-64 processors as well as Intel
1056 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
1057 x86_64 and x32 on non-CET processors. --enable-cet has been tested
1058 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
1061 * The GNU C Library now has correct support for ABSOLUTE symbols
1062 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
1063 relocated incorrectly or in some cases discarded. The GNU linker can
1064 make use of the newer semantics, but it must communicate it to the
1065 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
1066 field) to indicate such support is required.
1068 * Unicode 11.0.0 Support: Character encoding, character type info, and
1069 transliteration tables are all updated to Unicode 11.0.0, using
1070 generator scripts contributed by Mike FABIAN (Red Hat).
1072 * <math.h> functions that round their results to a narrower type are added
1073 from TS 18661-1:2014 and TS 18661-3:2015:
1075 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
1076 fMxaddfNx functions.
1078 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
1079 fMxsubfNx functions.
1081 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
1082 fMxmulfNx functions.
1084 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
1085 fMxdivfNx functions.
1087 * Two grammatical forms of month names are now supported for the following
1088 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
1089 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
1090 support two grammatical forms in abbreviated month names: Catalan, Greek,
1093 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
1094 include the support for two grammatical forms of month names.
1096 * Building and running on GNU/Hurd systems now works without out-of-tree
1099 * The renameat2 function has been added, a variant of the renameat function
1100 which has a flags argument. If the flags are zero, the renameat2 function
1101 acts like renameat. If the flag is not zero and there is no kernel
1102 support for renameat2, the function will fail with an errno value of
1103 EINVAL. This is different from the existing gnulib function renameatu,
1104 which performs a plain rename operation in case of a RENAME_NOREPLACE
1105 flags and a non-existing destination (and therefore has a race condition
1106 that can clobber the destination inadvertently).
1108 * The statx function has been added, a variant of the fstatat64
1109 function with an additional flags argument. If there is no direct
1110 kernel support for statx, glibc provides basic stat support based on
1111 the fstatat64 function.
1113 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
1114 library if installed. libidn2 version 2.0.5 or later is recommended. If
1115 libidn2 is not available, internationalized domain names are not encoded
1116 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
1117 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
1118 with an encoding error.) Flags which used to change the IDN encoding and
1119 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
1120 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
1121 deprecated. They no longer have any effect.
1123 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
1124 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
1125 range of ELF gABI expressions including such constructs as
1126 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
1127 have been further restricted, and where in the past a dynamic string
1128 token sequence may have been interpreted as a literal string it will
1129 now cause a load failure. These load failures were always considered
1130 unspecified behaviour from the perspective of the dynamic loader, and
1131 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
1132 results in a load failure now.
1134 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
1135 implementation includes all the standard functions provided by
1138 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
1139 thrd_detach, thrd_exit, and thrd_join for thread management.
1141 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
1142 mtx_destroy for mutual exclusion.
1144 - call_once for function call synchronization.
1146 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
1147 cnd_wait for conditional variables.
1149 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
1151 Application developers must link against libpthread to use ISO C threads.
1153 Deprecated and removed features, and other changes affecting compatibility:
1155 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
1156 installed. Software that was using either header should be updated to
1157 use standard <stdio.h> interfaces instead.
1159 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
1160 This was never required by the C standard, and the macros just expanded
1161 to call alternative names for the same functions. If you hoped getc and
1162 putc would provide performance improvements over fgetc and fputc, instead
1163 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
1164 necessary, flockfile and funlockfile.
1166 * All stdio functions now treat end-of-file as a sticky condition. If you
1167 read from a file until EOF, and then the file is enlarged by another
1168 process, you must call clearerr or another function with the same effect
1169 (e.g. fseek, rewind) before you can read the additional data. This
1170 corrects a longstanding C99 conformance bug. It is most likely to affect
1171 programs that use stdio to read interactive input from a terminal.
1174 * The macros 'major', 'minor', and 'makedev' are now only available from
1175 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
1176 headers that happen to include <sys/types.h>. These macros are rarely
1177 used, not part of POSIX nor XSI, and their names frequently collide with
1178 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
1179 further explanation.
1181 <sys/sysmacros.h> is a GNU extension. Portable programs that require
1182 these macros should first include <sys/types.h>, and then include
1183 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
1185 * The tilegx*-*-linux-gnu configurations are no longer supported.
1187 * The obsolete function ustat is no longer available to newly linked
1188 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
1189 function has been deprecated in favor of fstatfs and statfs.
1191 * The obsolete function nfsservctl is no longer available to newly linked
1192 binaries. This function was specific to systems using the Linux kernel
1193 and could not usefully be used with the GNU C Library on systems with
1194 version 3.1 or later of the Linux kernel.
1196 * The obsolete function name llseek is no longer available to newly linked
1197 binaries. This function was specific to systems using the Linux kernel
1198 and was not declared in a header. Programs should use the lseek64 name
1199 for this function instead.
1201 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
1202 getaddrinfo and getnameinfo functions have been deprecated. The behavior
1203 previously selected by them is now always enabled.
1205 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
1206 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
1207 restriction (rejecting '_' in host names, among other things) has been
1208 removed, for increased compatibility with non-IDN name resolution.
1210 * The fcntl function now have a Long File Support variant named fcntl64. It
1211 is added to fix some Linux Open File Description (OFD) locks usage on non
1212 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
1213 fcntl and LFS support is handled transparently. Also for Linux, the OFD
1214 locks act as a cancellation entrypoint.
1216 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
1217 ecb_crypt, and des_setparity are no longer available to newly linked
1218 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
1219 longer installed. These functions encrypted and decrypted data with the
1220 DES block cipher, which is no longer considered secure. Software that
1221 still uses these functions should switch to a modern cryptography library,
1224 * Reflecting the removal of the encrypt and setkey functions above, the
1225 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
1226 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1229 * The obsolete function fcrypt is no longer available to newly linked
1230 binaries. It was just another name for the standard function crypt,
1231 and it has not appeared in any header file in many years.
1233 * We have tentative plans to hand off maintenance of the passphrase-hashing
1234 library, libcrypt, to a separate development project that will, we hope,
1235 keep up better with new passphrase-hashing algorithms. We will continue
1236 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1237 'crypt_r' should not need to change at all; however, distributions will
1238 need to install <crypt.h> and libcrypt from a separate project.
1240 In this release, if the configure option --disable-crypt is used, glibc
1241 will not install <crypt.h> or libcrypt, making room for the separate
1242 project's versions of these files. The plan is to make this the default
1243 behavior in a future release.
1245 Changes to build and runtime requirements:
1247 GNU make 4.0 or later is now required to build glibc.
1249 Security related changes:
1251 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1252 been fixed by removing the glibc-internal IDNA implementation and using
1253 the system-provided libidn2 library instead. Originally reported by Hanno
1254 Böck and Christian Weisgerber.
1256 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1257 architecture could corrupt memory. Reported by Max Horn.
1259 CVE-2018-11236: Very long pathname arguments to realpath function could
1260 result in an integer overflow and buffer overflow. Reported by Alexey
1263 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1264 architecture could write beyond the target buffer, resulting in a buffer
1265 overflow. Reported by Andreas Schwab.
1267 The following bugs are resolved with this release:
1269 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1270 [6889] manual: 'PWD' mentioned but not specified
1271 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1272 when __WORDSIZE != 64
1273 [13762] regex: re_search etc. should return -2 on memory exhaustion
1274 [13888] build: /tmp usage during testing
1275 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1276 [14092] nptl: Support C11 threads
1277 [14095] localedata: Review / update collation data from Unicode / ISO
1279 [14508] libc: -Wformat warnings
1280 [14553] libc: Namespace pollution loff_t in sys/types.h
1281 [14890] libc: Make NT_PRFPREG canonical.
1282 [15105] libc: Extra PLT references with -Os
1283 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1285 [16335] manual: Feature test macro documentation incomplete and out of
1287 [16552] libc: Unify umount implementations in terms of umount2
1288 [17082] libc: htons et al.: statement-expressions prevent use on global
1289 scope with -O1 and higher
1290 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1291 [17438] localedata: pt_BR: wrong d_fmt delimiter
1292 [17662] libc: please implement binding for the new renameat2 syscall
1293 [17721] libc: __restrict defined as /* Ignore */ even in c11
1294 [17979] libc: inconsistency between uchar.h and stdint.h
1295 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1296 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1297 horrible machine code)
1298 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1300 [18471] libc: llseek should be a compat symbol
1301 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1303 [18991] nss: nss_files skips large entry in database
1304 [19239] libc: Including stdlib.h ends up with macros major and minor being
1306 [19463] libc: linknamespace failures when compiled with -Os
1307 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1308 [19527] locale: Normalized charset name not recognized by setlocale
1309 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1310 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1312 [19728] network: out of bounds stack read in libidn function
1313 idna_to_ascii_4i (CVE-2016-6261)
1314 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1315 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1316 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1318 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1319 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1320 [20419] dynamic-link: files with large allocated notes crash in
1322 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1323 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1324 [20980] manual: CFLAGS environment variable replaces vital options
1325 [21163] regex: Assertion failure in pop_fail_stack when executing a
1326 malformed regexp (CVE-2015-8985)
1327 [21234] manual: use of CFLAGS makes glibc detect no optimization
1328 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1329 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1330 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1331 [21508] locale: intl/tst-gettext failure with latest msgfmt
1332 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1333 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1334 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1336 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1338 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1339 [22247] network: Integer overflow in the decode_digit function in
1340 puny_decode.c in libidn (CVE-2017-14062)
1341 [22342] nscd: NSCD not properly caching netgroup
1342 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1343 [22550] localedata: es_ES locale (and other es_* locales): collation
1344 should treat ñ as a primary different character, sync the collation
1345 for Spanish with CLDR
1346 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1347 by gcc configured with --enable-default-pie
1348 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1349 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1350 crossing 2GB threshold (CVE-2017-18269)
1351 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1353 [22735] time: Misleading typo in time.h source comment regarding
1355 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1356 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1357 `__assert_perror_fail ()' to `__assert_fail_base ()'
1358 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1360 [22786] libc: Stack buffer overflow in realpath() if input size is close
1361 to SSIZE_MAX (CVE-2018-11236)
1362 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1363 through an absolute DT_NEEDED path
1364 [22792] build: tcb-offsets.h dependency dropped
1365 [22797] libc: pkey_get() uses non-reserved name of argument
1366 [22807] libc: PTRACE_* constants missing for powerpc
1367 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1368 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1369 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1370 [22848] localedata: ca_ES: update date definitions from CLDR
1371 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1372 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1373 [22896] localedata: Update locale data for an_ES
1374 [22902] math: float128 test failures with GCC 8
1375 [22918] libc: multiple common of `__nss_shadow_database'
1376 [22919] libc: sparc32: backtrace yields infinite backtrace with
1378 [22926] libc: FTBFS on powerpcspe
1379 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1381 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1382 [22947] libc: FAIL: misc/tst-preadvwritev2
1383 [22963] localedata: cs_CZ: Add alternative month names
1384 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1385 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1386 [22998] dynamic-link: execstack tests are disabled when SELinux is
1388 [23005] network: Crash in __res_context_send after memory allocation
1390 [23007] math: strtod cannot handle -nan
1391 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1392 [23036] regex: regex equivalence class regression
1393 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1394 [23069] libc: sigaction broken on riscv64-linux-gnu
1395 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1396 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1397 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1398 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1399 and libc build with -Os)
1400 [23140] localedata: More languages need two forms of month names
1401 [23145] libc: _init/_fini aren't marked as hidden
1402 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1403 [23171] math: C++ iseqsig for long double converts arguments to double
1404 [23178] nscd: sudo will fail when it is run in concurrent with commands
1405 that changes /etc/passwd
1406 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1408 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1409 [23208] localedata: New locale - Lower Sorbian (dsb)
1410 [23233] regex: Memory leak in build_charclass_op function in file
1412 [23236] stdio: Harden function pointers in _IO_str_fields
1413 [23250] nptl: Offset of __private_ss differs from GCC
1414 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1415 -mtune=generic -mfpmath=sse
1416 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1418 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1419 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1421 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1422 [23277] math: nan function should not have const attribute
1423 [23279] math: scanf and strtod wrong for some hex floating-point
1424 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1426 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1427 [23303] build: undefined reference to symbol
1428 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1429 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1431 [23313] stdio: libio vtables validation and standard file object
1433 [23329] libc: The __libc_freeres infrastructure is not properly run across
1435 [23349] libc: Various glibc headers no longer compatible with
1437 [23351] malloc: Remove unused code related to heap dumps and malloc
1439 [23363] stdio: stdio-common/tst-printf.c has non-free license
1440 [23396] regex: Regex equivalence regression in single-byte locales
1441 [23422] localedata: oc_FR: More updates of locale data
1442 [23442] build: New warning with GCC 8
1443 [23448] libc: Out of bounds access in IBM-1390 converter
1444 [23456] libc: Wrong index_cpu_LZCNT
1445 [23458] build: tst-get-cpu-features-static isn't added to tests
1446 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1448 [23467] dynamic-link: x86/CET: A property note parser bug
1455 * The GNU C Library can now be compiled with support for building static
1456 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1457 executables are like static executables but can be loaded at any address
1458 and provide additional security hardening benefits at the cost of some
1459 memory and performance. When the library is built with --enable-static-pie
1460 the resulting libc.a is usable with GCC 8 and above to create static PIE
1461 executables using the GCC option '-static-pie'. This feature is currently
1462 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1463 aarch64 with binutils 2.30 or later.
1465 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1466 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1469 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1471 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1473 * In order to support faster and safer process termination the malloc API
1474 family of functions will no longer print a failure address and stack
1475 backtrace after detecting heap corruption. The goal is to minimize the
1476 amount of work done after corruption is detected and to avoid potential
1477 security issues in continued process execution. Reducing shutdown time
1478 leads to lower overall process restart latency, so there is benefit both
1479 from a security and performance perspective.
1481 * The abort function terminates the process immediately, without flushing
1482 stdio streams. Previous glibc versions used to flush streams, resulting
1483 in deadlocks and further data corruption. This change also affects
1484 process aborts as the result of assertion failures.
1486 * On platforms where long double has the IEEE binary128 format (aarch64,
1487 alpha, mips64, riscv, s390 and sparc), the math library now implements
1488 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1489 These are the same interfaces added in version 2.26 for some platforms where
1490 this format is supported but is not the format of long double.
1492 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1493 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1494 implements interfaces for that type, as defined by ISO/IEC TS
1495 18661-3:2015. These are corresponding interfaces to those supported for
1498 * The math library now implements interfaces for the _Float32, _Float64 and
1499 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1500 corresponding interfaces to those supported for _Float128.
1502 * glibc now implements the memfd_create and mlock2 functions on Linux.
1504 * Support for memory protection keys was added. The <sys/mman.h> header now
1505 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1508 * The copy_file_range function was added.
1510 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1512 * The ldconfig utility now processes `include' directives using the C/POSIX
1513 collation ordering. Previous glibc versions used locale-specific
1514 ordering, the change might break systems that relied on that.
1516 * Support for two grammatical forms of month names has been added.
1517 In a call to strftime, the "%B" and "%b" format specifiers will now
1518 produce the grammatical form required when the month is used as part
1519 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1520 required when the month is named by itself. For instance, in Greek
1521 and in many Slavic and Baltic languages, "%B" will produce the month
1522 in genitive case, and "%OB" will produce the month in nominative case.
1524 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1525 are all valid and will all accept any known form of month
1526 name---standalone or complete, abbreviated or full. In a call to
1527 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1528 the strings used by "%B" and "%b", respectively. New query
1529 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1530 used by "%OB" and "%Ob", respectively.
1532 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1533 define the strings for %OB and %Ob, respectively; these have the
1534 same syntax as "mon" and "abmon". These arrays are optional; if they
1535 are not provided then they have the same content as "mon" and "abmon",
1538 These features are provided for locales which define "alt_mon" and/or
1539 "ab_alt_mon" in their locale source data. This release includes such
1540 alternative month name data for the following languages: Belarusian,
1541 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1543 This feature is currently a GNU extension, but it is expected to
1544 be added to the next revision of POSIX, and it is also already
1545 available on some BSD-derived operating systems.
1547 This feature will cause existing statically compiled applications
1548 to fail to load locales and fall back to the builtin C/POSIX locales.
1549 See notes below for other changes affecting compatibility.
1551 * Support for the RISC-V ISA running on Linux has been added. This port
1552 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1553 for the following ISA and ABI pairs:
1559 Deprecated and removed features, and other changes affecting compatibility:
1561 * Statically compiled applications attempting to load locales compiled for the
1562 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1563 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1564 support for two grammatical forms of the month names, also extends the locale
1565 data binary format. Static applications needing locale support must be
1566 recompiled to match the runtime and data they are deployed with. In some
1567 distributions there is an upgrade window where dynamically linked applications
1568 may use a new library but the old locale data and also fall back to the
1569 builtin C/POSIX locales; restarting the application process is sufficient to
1572 * Support for statically linked applications which call dlopen is deprecated
1573 and will be removed in a future version of glibc. Applications which call
1574 dlopen need to be linked dynamically instead.
1576 * Support for old programs which use internal stdio data structures and
1577 functions is deprecated. This includes programs which use the C++ streams
1578 provided by libstdc++ in GCC 2.95. Programs which use the internal
1579 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1580 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1581 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1582 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1583 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1584 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1585 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1586 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1587 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1588 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1589 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1590 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1591 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1592 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1593 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1594 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1595 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1596 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1597 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1598 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1599 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1600 future version of glibc. Unlike other symbol removals, these old
1601 applications will not be supported using compatibility symbols.
1603 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1604 defined by <sys/ptrace.h>.
1606 * libm no longer supports SVID error handling (calling a user-provided
1607 matherr function on error) or the _LIB_VERSION variable to control error
1608 handling. (SVID error handling and the _LIB_VERSION variable still work
1609 for binaries linked against older versions of the GNU C Library.) The
1610 libieee.a library is no longer provided. math.h no longer defines struct
1611 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1612 TLOSS, PLOSS and HUGE.
1614 * The libm functions pow10, pow10f and pow10l are no longer supported for
1615 new programs. Programs should use the standard names exp10, exp10f and
1616 exp10l for these functions instead.
1618 * The mcontext_t type is no longer the same as struct sigcontext. On
1619 platforms where it was previously the same, this changes the C++ name
1620 mangling for interfaces involving this type.
1622 * The add-ons mechanism for building additional packages at the same time as
1623 glibc has been removed. The --enable-add-ons configure option is now
1626 * The --without-fp configure option is now ignored. Whether hardware
1627 floating-point instructions are used is now configured based on whether
1628 the compiler used at configure time (without any options implied by a
1629 --with-cpu= configure option) uses such instructions.
1631 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1632 the specified string can be parsed as a domain name.
1634 * In the malloc_info output, the <heap> element may contain another <aspace>
1635 element, "subheaps", which contains the number of sub-heaps.
1637 * The libresolv function p_secstodate is no longer supported for new
1640 * The tilepro-*-linux-gnu configuration is no longer supported.
1642 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1643 and will be removed in a future release. Software that is still using
1644 either header should be updated to use standard <stdio.h> interfaces
1647 libio.h was originally the header for a set of supported GNU extensions,
1648 but they have not been maintained as such in many years, they are now
1649 standing in the way of improvements to stdio, and we don't think there are
1650 any remaining external users. _G_config.h was never intended for public
1651 use, but predates the bits convention.
1653 Changes to build and runtime requirements:
1655 * bison version 2.7 or later is required to generate code in the 'intl'
1658 Security related changes:
1660 CVE-2009-5064: The ldd script would sometimes run the program under
1661 examination directly, without preventing code execution through the
1662 dynamic linker. (The glibc project disputes that this is a security
1663 vulnerability; only trusted binaries must be examined using the ldd
1666 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1667 suffered from a one-byte overflow during ~ operator processing (either
1668 on the stack or the heap, depending on the length of the user name).
1669 Reported by Tim Rühsen.
1671 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1672 would sometimes fail to free memory allocated during ~ operator
1673 processing, leading to a memory leak and, potentially, to a denial
1676 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1677 without GLOB_NOESCAPE, could write past the end of a buffer while
1678 unescaping user names. Reported by Tim Rühsen.
1680 CVE-2017-17426: The malloc function, when called with an object size near
1681 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1682 instead of NULL. This was a regression introduced with the new malloc
1683 thread cache in glibc 2.26. Reported by Iain Buclaw.
1685 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1686 to the allocation of too much memory. (This is not a security bug per se,
1687 it is mentioned here only because of the CVE assignment.) Reported by
1690 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1691 of the number of search path components. (This is not a security
1692 vulnerability per se because no trust boundary is crossed if the fix for
1693 CVE-2017-1000366 has been applied, but it is mentioned here only because
1694 of the CVE assignment.) Reported by Qualys.
1696 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1697 for AT_SECURE or SUID binaries could be used to load libraries from the
1700 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1701 succeeds without returning an absolute path due to unexpected behaviour
1702 of the Linux kernel getcwd syscall. Reported by halfdog.
1704 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1705 an object size near the value of SIZE_MAX, would return a pointer to a
1706 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1708 CVE-2018-6551: The malloc function, when called with an object size near
1709 the value of SIZE_MAX, would return a pointer to a buffer which is too
1710 small, instead of NULL.
1712 The following bugs are resolved with this release:
1714 [866] glob: glob should match dangling symlinks
1715 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1716 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1718 [5997] math: Very slow execution of sinf function
1719 [10580] localedata: hr_HR: updated locale
1720 [10871] locale: 'mon' array should contain both nominative and genitive
1722 [12349] localedata: eu_ES: incorrect thousands separator
1723 [13605] localedata: shn_MM: new Shan locale
1724 [13805] localedata: ru_RU: currency should use ',' as radix point
1725 [13953] localedata: km_KH: locale update
1726 [13994] localedata: mjw_IN: new locale
1727 [14121] build: make writes .mo files in po directory
1728 [14333] libc: Fix the race between atexit() and exit()
1729 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1730 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1732 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1733 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1734 width Latin characters
1735 [15332] localedata: es_CU: locale update
1736 [15436] stdio: Don't close or flush stdio streams on abort
1737 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1739 [16148] localedata: ca_ES: incorrect thousands separator
1740 [16750] dynamic-link: ldd should not try to execute the binaries
1742 [16777] localedata: pl_PL: incorrect thousands separator in locale
1743 [16905] localedata: hanzi: new collation
1744 [17563] localedata: cmn_TW: add hanzi collation
1745 [17750] localedata: wrong collation order of diacritics in most locales
1746 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1748 [17956] build: Build fails on missing definitions from header file
1749 nss/nss.h when Mozilla NSS is used for cryptography
1750 [18203] libc: realpath() does not handle unreachable paths correctly
1751 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1752 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1753 [18822] libc: Internal functions are called via PLT
1754 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1755 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1756 [19574] libc: glibc should support building static PIE binaries
1757 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1759 [19971] glob: glob: Do not skip entries with zero d_ino values
1760 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1761 [20008] localedata: km_KH: convert to translit_neutral
1762 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1763 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1764 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1765 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1766 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1768 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1769 they're set, wrong errors returned by gaih_inet when lookup functions
1771 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1772 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1774 [20952] localedata: yuw_PG: new locale
1775 [21084] localedata: charmaps/IBM858: new codepage
1776 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1777 [21242] libc: assert gives pedantic warning in old gcc versions
1778 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1779 __regcall calling convention
1780 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1781 [21326] libc: C99 functions are not declared for C++11 and later if
1782 _GNU_SOURCE is not predefined by g++
1783 [21457] libc: sys/ucontext.h namespace
1784 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1785 [21660] math: GCC fails to compile a formula with tgmath.h
1786 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1787 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1788 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1789 [21684] math: tgmath.h handling of complex integers
1790 [21685] math: tgmath.h handling of bit-fields
1791 [21686] math: tgmath.h handling of __int128
1792 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1794 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1796 [21750] localedata: column width of characters incompatible with classical
1798 [21754] malloc: malloc: Perform as little work as possible after heap
1799 consistency check failures
1800 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1801 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1802 [21791] string: Unused XXX_chk_XXX functions in libc.a
1803 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1805 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1807 [21845] localedata: Added new Locale bho_NP
1808 [21853] localedata: Fix abday Which looks same as day in zh_SG
1809 [21854] localedata: Added New Locale en_SC
1810 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1811 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1812 _dl_runtime_resolve_avx_slow
1813 [21885] network: getaddrinfo: gethosts does not release resolver context
1814 on memory allocation failure
1815 [21899] libc: XPG4.2 sigaction namespace
1816 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1818 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1820 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1821 errno value, causing getaddrinfo to fail
1822 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1823 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1824 instead of EAI_NODATA
1825 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1826 constant PTRACE_SEIZE_DEVEL
1827 [21930] math: C-only gcc builtins used in <math.h> isinf
1828 [21932] network: Unpaired __resolv_context_get in generic get*_r
1830 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1831 [21944] libc: sigval namespace
1832 [21951] localedata: Update hanzi collation by stroke
1833 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1834 sysdeps/x86_64/fpu/e_expf.S
1835 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1836 allocation in syscall loops)
1837 [21959] localedata: Fix Country name for xh_ZA
1838 [21960] localedata: Fix abmon for bem_ZM
1839 [21966] math: AVX2 mathvec functions use FMA without checking
1840 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1841 [21971] localedata: Added New Locale for mfe_MU
1842 [21972] libc: assert macro requires operator== (int) for its argument type
1843 [21973] math: [sparc] libm missing sqrtl compat symbol
1844 [21974] libc: Remove __bb_init_func and __bb_exit_func
1845 [21982] string: stratcliff.c: error: assuming signed overflow does not
1847 [21986] stdio: __guess_grouping is called incorrectly
1848 [21987] math: [sparc32] wrong bits/long-double.h installed
1849 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1851 [22022] localedata: Missing country_name for mni_IN
1852 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1854 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1856 [22026] locale: iconv_open: heap overflow on gconv_init failure
1857 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1858 [22035] math: [m68k] bits/math-inline.h macro namespace
1859 [22038] localedata: Fix abbreviated weeks and months for Somali
1860 [22044] localedata: Remove redundant data for Limburgish Language
1861 [22050] malloc: Linking with -lmcheck does not hook
1862 __malloc_initialize_hook correctly
1863 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1864 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1865 [22070] localedata: charmaps/UTF-8: wcwidth for
1866 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1867 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1868 Jungseong and Jongseong) should be 0
1869 [22078] nss: nss_files performance issue in multi mode
1870 [22082] math: bits/math-finite.h exp10 condition
1871 [22086] libc: pcprofiledump incorrect cross-endian condition
1872 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1873 [22095] network: Name server address allocation memory leak in resolv.conf
1875 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1877 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1878 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1880 [22111] malloc: malloc: per thread cache is not returned when thread exits
1881 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1882 [22134] libc: [linux] implement fexecve with execveat
1883 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1885 [22145] libc: ttyname() gives up too early in the face of namespaces
1886 [22146] math: C++ build issue with float128 on x86_64
1887 [22153] nptl: nptl: save error code before process termination
1888 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1889 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1890 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1891 [22165] libc: [hppa] Text relocations in libc.so
1892 [22180] libc: destructor registered via __cxa_atexit is called twice
1893 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1894 symlinks") cause "make" segfaults
1895 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1897 [22207] libc: FAIL: stdlib/test-atexit-race
1898 [22225] math: nearbyint arithmetic moved before feholdexcept
1899 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1900 [22235] math: iscanonical in C++ and float128
1901 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1902 the svid compat wrapper
1903 [22244] math: ynf and yn are wrong without the svid compat wrapper
1904 [22273] libc: Improper assert in Linux posix_spawn implementation
1905 [22284] libc: -pg -pie doesn't work
1906 [22292] locale: localedef exits with error 4 when it should be error 1
1907 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1908 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1910 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1911 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1913 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1914 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1915 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1916 [22322] libc: [mips64] wrong bits/long-double.h installed
1917 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1918 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1920 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1921 [22343] malloc: Integer overflow in posix_memalign
1922 [22347] libc: getrandom() returns the number of bytes that were copied to
1923 the buffer even though the comments say "Return 0 on success and -1 on
1925 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1926 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1928 [22370] dynamic-link: Incorrect note padding check
1929 [22375] libc: malloc returns pointer from tcache_get when should return
1930 NULL (CVE-2017-17426)
1931 [22377] math: iseqsig, float128 and C++
1932 [22382] localedata: Error in tpi_PG locale
1933 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1934 inside the ASCII printable range
1935 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1937 [22403] localedata: Slash needs escaping in some locales
1938 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1939 [22409] network: res_hnok does not accept some host names used on the
1941 [22412] network: res_dnok, res_hnok should perform syntax checks
1942 [22413] network: ns_name_pton ignores syntactically invalid trailing
1944 [22415] stdio: setvbuf can lead to invalid free/segfault
1945 [22432] build: Non-deterministic build
1946 [22439] malloc: malloc_info should compute summary statistics for all sub-
1948 [22442] network: if_nametoindex could report index for the wrong
1949 networking interface
1950 [22446] build: aliasing violation calling readlink in handle_request
1951 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1952 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1953 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1954 __nscd_hash/__nss_hash
1955 [22463] network: p_secstodate overflow handling
1956 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1957 [22478] libc: sigwait can fail with EINTR
1958 [22505] libc: ldconfig processes include directive in locale-specific
1960 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1961 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1962 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1963 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1964 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1965 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1966 same as for Croatian
1967 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1968 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1969 [22577] libc: missing newline after "cannot allocate TLS data structures
1971 [22588] manual: manual/conf.texi: missing underscore in front of
1973 [22593] math: nextafter and nexttoward are declared with const attribute
1974 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1975 [22603] string: ia64 memchr overflows internal pointer check
1976 [22605] libc: SH clone does not set the exit code correctly
1977 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1979 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1980 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1981 modified in case of success
1982 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
1983 [22615] manual: manual: ambiguous wording about errno value in case of
1985 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1987 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1988 binaries or if /proc is not mounted (CVE-2017-16997)
1989 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1990 [22630] build: $(no-pie-ldflag) is no longer effective
1991 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1992 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1993 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1994 [22637] nptl: guard size is subtracted from thread stack size instead of
1996 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1997 [22657] localedata: hu_HU: Avoid double space in date
1998 [22660] math: fmax, fmin sNaN handling on alpha
1999 [22664] libc: New warning of GCC8
2000 [22665] math: alpha: ceil and floor raise inexact exceptions
2001 [22666] math: alpha: trunc raise inexact exceptions
2002 [22667] libc: makecontext lacks stack alignment on i386
2003 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
2004 [22679] libc: getcwd(3) can succeed without returning an absolute path
2006 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
2007 elision and tunables
2008 [22687] math: [powerpc-nofpu] complex long double functions spurious
2010 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
2011 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
2012 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
2014 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
2015 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
2017 [22701] nis: Incomplete removal of libnsl
2018 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
2019 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
2020 [22715] dynamic-link: FAIL: elf/tst-audit10
2021 [22719] libc: Backtrace tests fail on hppa
2022 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
2023 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
2024 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
2025 before the first call to crypt_r () in crypt/badsalttest.c
2032 * A per-thread cache has been added to malloc. Access to the cache requires
2033 no locks and therefore significantly accelerates the fast path to allocate
2034 and free small amounts of memory. Refilling an empty cache requires locking
2035 the underlying arena. Performance measurements show significant gains in a
2036 wide variety of user workloads. Workloads were captured using a special
2037 instrumented malloc and analyzed with a malloc simulator. Contributed by
2038 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
2040 * Unicode 10.0.0 Support: Character encoding, character type info, and
2041 transliteration tables are all updated to Unicode 10.0.0, using
2042 generator scripts contributed by Mike FABIAN (Red Hat).
2043 These updates cause user visible changes, especially the changes in
2044 wcwidth for many emoji characters cause problems when emoji sequences
2045 are rendered with pango, see for example:
2046 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
2048 * Collation of Hungarian has been overhauled and is now consistent with "The
2049 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
2052 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
2054 - The GNU C Library will now detect when /etc/resolv.conf has been
2055 modified and reload the changed configuration. The new resolver option
2056 “no-reload” (RES_NORELOAD) disables this behavior.
2058 - The GNU C Library now supports an arbitrary number of search domains
2059 (configured using the “search” directive in /etc/resolv.conf);
2060 previously, there was a hard limit of six domains. For backward
2061 compatibility, applications that directly modify the ‘_res’ global
2062 object are still limited to six search domains.
2064 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
2065 Library will now randomly pick a name server from the configuration as a
2066 starting point. (Previously, the second name server was always used.)
2068 * The tunables feature is now enabled by default. This allows users to tweak
2069 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
2071 * New function reallocarray, which resizes an allocated block (like realloc)
2072 to the product of two sizes, with a guaranteed clean failure upon integer
2073 overflow in the multiplication. Originally from OpenBSD, contributed by
2074 Dennis Wölfing and Rüdiger Sonderfeld.
2076 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
2077 These are extended versions of preadv and pwritev, respectively, taking an
2078 additional flags argument. The set of supported flags depends on the
2079 running kernel; full support currently requires kernel 4.7 or later.
2081 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
2082 create a new session ID for the spawned process. This feature is
2083 scheduled to be added to the next major revision of POSIX; for the time
2084 being, it is available under _GNU_SOURCE.
2086 * errno.h is now safe to use from C-preprocessed assembly language on all
2087 supported operating systems. In this context, it will only define the
2088 Exxxx constants, as preprocessor macros expanding to integer literals.
2090 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
2091 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
2092 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
2093 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
2095 To compile programs that use this feature, the compiler must support
2096 128-bit floating point with the type name _Float128 (as defined by TS
2097 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
2098 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
2099 must be defined to make the new interfaces visible.
2101 The new functions and macros correspond to those present for other
2102 floating-point types (except for a few obsolescent interfaces not
2103 supported for the new type), with F128 or f128 suffixes; for example,
2104 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
2105 printf or scanf formats for the new type; the strfromf128 and strtof128
2106 interfaces should be used instead.
2108 Deprecated and removed features, and other changes affecting compatibility:
2110 * The synchronization that pthread_spin_unlock performs has been changed to
2111 now be equivalent to a C11 atomic store with release memory order to the
2112 spin lock's memory location. Previously, several (but not all)
2113 architectures used stronger synchronization (e.g., containing what is
2114 often called a full barrier). This change can improve performance, but
2115 may affect odd fringe uses of spin locks that depend on the previous
2116 behavior (e.g., using spin locks as atomic variables to try to implement
2117 Dekker's mutual exclusion algorithm).
2119 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
2122 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
2123 will only be built and installed when the GNU C Library is configured with
2124 --enable-obsolete-rpc. This allows alternative RPC implementations, such
2125 as TIRPC or rpcsvc-proto, to be used.
2127 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
2128 libnss_compat, are deprecated, and will not be built or installed by
2131 The NIS(+) support library, libnsl, is also deprecated. By default, a
2132 compatibility shared library will be built and installed, but not headers
2133 or development libraries. Only a few NIS-related programs require this
2134 library. (In particular, the GNU C Library has never required programs
2135 that use 'gethostbyname' to be linked with libnsl.)
2137 Replacement implementations based on TIRPC, which additionally support
2138 IPv6, are available from <https://github.com/thkukuk/>. The configure
2139 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
2140 name service modules, to be built and installed.
2142 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
2143 support is enabled, the configured recursive resolver must support EDNS.
2144 (Responding to EDNS-enabled queries with responses which are not
2145 EDNS-enabled is fine, but FORMERR responses are not.)
2147 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
2148 servers have not supported this opcode for a long time.
2150 * The _res_opcodes variable has been removed from libresolv. It had been
2151 exported by accident.
2153 * <string.h> no longer includes inline versions of any string functions,
2154 as this kind of optimization is better done by the compiler. The macros
2155 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
2157 * The nonstandard header <xlocale.h> has been removed. Most programs should
2158 use <locale.h> instead. If you have a specific need for the definition of
2159 locale_t with no other declarations, please contact
2160 libc-alpha@sourceware.org and explain.
2162 * The obsolete header <sys/ultrasound.h> has been removed.
2164 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
2166 * The obsolete function cfree has been removed. Applications should use
2169 * The stack_t type no longer has the name struct sigaltstack. This changes
2170 the C++ name mangling for interfaces involving this type.
2172 * The ucontext_t type no longer has the name struct ucontext. This changes
2173 the C++ name mangling for interfaces involving this type.
2175 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
2176 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
2177 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
2178 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
2179 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
2180 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
2181 fpregset_t type no longer has the name struct fpu. This changes the C++
2182 name mangling for interfaces involving those types.
2184 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
2185 synced with the kernel:
2187 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
2188 are not supported on this architecture and have been removed.
2190 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
2191 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
2192 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
2194 Programs that assume the GET/SETREGS ptrace requests are universally
2195 available will now fail to build, instead of malfunctioning at runtime.
2197 Changes to build and runtime requirements:
2199 * Linux kernel 3.2 or later is required at runtime, on all architectures
2200 supported by that kernel. (This is a change from version 2.25 only for
2203 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
2205 * On most architectures, GCC 4.9 or later is required to build the GNU C
2206 Library. On powerpc64le, GCC 6.2 or later is required.
2208 Older GCC versions and non-GNU compilers are still supported when
2209 compiling programs that use the GNU C Library. (We do not know exactly
2210 how old, and some GNU extensions to C may be _de facto_ required. If you
2211 are interested in helping us make this statement less vague, please
2212 contact libc-alpha@sourceware.org.)
2214 Security related changes:
2216 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
2217 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
2219 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
2220 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
2222 * Avoid printing a backtrace from the __stack_chk_fail function since it is
2223 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
2226 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
2227 fixed (CVE-2017-12133).
2229 The following bugs are resolved with this release:
2231 [984] network: Respond to changed resolv.conf in gethostbyname
2232 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2233 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2235 [12189] libc: __stack_chk_fail should not attempt a backtrace
2237 [14096] time: Race condition on timezone/tst-timezone.out
2238 [14172] localedata: az_IR: new locale
2239 [14995] build: glibc fails to build if gold is the default linker, even if
2241 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2242 [16637] network: inet_pton function is accepting IPv6 with bad format
2243 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2244 x86 and other generic code
2245 [16875] localedata: ko_KR: fix lang_name
2246 [17225] localedata: ar_SY: localized month names for May and June are
2248 [17297] localedata: da_DK: wrong date_fmt string
2249 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2250 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2251 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2252 [19066] localedata: ar_SA abbreviated day and month names are in English
2253 [19569] network: resolv: Support an arbitrary number of search domains
2254 [19570] network: Implement random DNS server selection in the stub
2256 [19838] locale: localedef fails on PA-RISC
2257 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2258 order of 0D36 and 0D37
2259 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2261 [20098] libc: FAIL: debug/backtrace-tst on hppa
2262 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2264 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2266 [20313] localedata: Update locale data to Unicode 9.0
2267 [20424] manual: Document how to provide a malloc replacement
2268 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2270 [20686] locale: Add el_GR@euro to SUPPORTED.
2271 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2272 failures consistently
2273 [21015] dynamic-link: Document and fix --enable-bind-now
2274 [21016] nptl: pthread_cond support is broken on hppa
2275 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2276 frame-pointer on i386
2277 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2279 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2280 [21088] libc: Build fails with --enable-static-nss
2281 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2282 generic c code is used
2283 [21109] libc: Tunables broken on big-endian
2284 [21112] math: powf has large ulp errors with base close to 1 and exponent
2286 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2288 [21120] malloc: glibc malloc is incompatible with GCC 7
2289 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2291 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2292 (-0.0) when linking with -lieee
2293 [21171] math: log10, log2 and lgamma return incorrect results
2294 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2295 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2296 [21207] localedata: ce_RU: update weekdays from CLDR
2297 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2298 [21217] localedata: Update months from CLDR-31
2299 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2300 [21243] libc: support_delete_temp_file should issue warning for failed
2302 [21244] libc: support resolv_test_start() socket fd close should be
2304 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2305 new posix_spawn implementation
2306 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2307 leads to lower CPU frequency
2308 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2309 [21261] libc: [sparc64] bits/setjmp.h namespace
2310 [21267] network: [mips] bits/socket.h IOC* namespace
2311 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2312 [21270] libc: mmap64 silently truncates large offset values
2313 [21275] libc: posix_spawn always crashes on ia64 now
2314 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2315 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2316 [21289] libc: Incorrect declaration for 32-bit platforms with
2317 _FILE_OFFSET_BITS=64 causes build error
2318 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2319 not support gethostbyname4_r
2320 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2322 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2324 [21340] libc: Support POSIX_SPAWN_SETSID
2325 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2326 [21359] network: ns_name_pack needs additional byte in destination buffer
2327 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2328 against fragmentation attacks (CVE-2017-12132)
2329 [21369] network: resolv: Remove EDNS fallback
2330 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2332 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2333 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2334 [21393] stdio: Missing dup3 error check in freopen, freopen64
2335 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2336 [21399] localedata: Bad description for U00EC in
2337 localedata/charmaps/CP1254
2338 [21411] malloc: realloc documentation error
2339 [21426] network: sys/socket.h uio.h namespace
2340 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2341 [21445] libc: signal.h bsd_signal namespace
2342 [21455] network: Network headers stdint.h namespace
2343 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2345 [21475] network: resolv: Overlong search path is truncated mid-label
2346 [21511] libc: sigstack namespace
2347 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2348 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2349 bits/syscall.h: No such file or directory
2350 [21517] libc: struct sigaltstack namespace
2351 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2352 [21533] localedata: Update locale data to Unicode 10.0
2354 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2355 junk at end of line, first unrecognized character is `@'
2356 [21538] libc: SIG_HOLD missing for XPG4
2357 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2358 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2359 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2360 [21543] libc: sigevent namespace
2361 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2362 size for general purpose registers in mcontext_t structure
2363 [21550] libc: sigwait namespace
2364 [21552] libc: XPG4 bsd_signal namespace
2365 [21554] libc: sigpause namespace
2366 [21560] libc: sys/wait.h signal.h namespace
2367 [21561] libc: waitid namespace
2368 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2369 '/usr/include/stdlib.h': Permission denied
2370 [21575] libc: sys/wait.h missing struct rusage definition
2371 [21584] libc: sigaltstack etc namespace
2372 [21597] libc: siginterrupt namespace
2373 [21607] math: hppa: FAIL: math/test-tgmath
2374 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2376 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2377 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2378 stack and heap (CVE-2017-1000366)
2379 [21625] libc: wait3 namespace
2380 [21654] nss: Incorrect pointer alignment in NSS group merge result
2382 [21657] network: Parse interface zone id for node-local multicast
2383 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2385 [21666] libc: .symver is used on common symbol
2386 [21668] network: resolv: res_init cross-thread broadcast introduces race
2388 [21687] math: tgmath.h totalorder, totalordermag return type
2389 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2391 [21696] libc: Incorrect assumption of of __cpu_mask in
2392 posix/sched_cpucount.c
2393 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2394 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2396 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2397 leading to relocation crash
2398 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2399 `resolv_conf_matches (resp, conf)' failed.
2400 [21710] localedata: Added Samoan language locale for Samoa
2401 [21711] localedata: Pashto yesstr/nostr locale are missing
2402 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2403 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
2404 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2405 [21723] localedata: yesstr/nostr missing for Chinese language locale
2406 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2408 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2410 [21728] localedata: New Locale for Tongan language
2411 [21729] localedata: incorrect LC_NAME fields for hi_IN
2412 [21733] localedata: yesstr and nostr are missing for zh_HK
2413 [21734] localedata: Missing yesstr and nostr are for kw_GB
2414 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2415 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2416 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2417 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2419 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2421 [21749] localedata: Wrong abbreviated day name (“abday”) for
2423 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2424 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2425 [21759] localedata: missing yesstr and nostr for Tigrinya
2426 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2427 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2428 [21767] localedata: Missing Bislama locales
2429 [21768] localedata: Missing yesstr and nostr for aa_ET
2430 [21770] localedata: Missing Field in li_NL
2431 [21778] nptl: Robust mutex may deadlock
2432 [21779] libc: MicroBlaze segfaults when loading libpthread
2433 [21783] localedata: Fix int_select international_call_prefixes
2434 [21784] localedata: Inconsistency in country_isbn
2435 [21788] localedata: Missing Country Postal Abbreviations
2436 [21794] localedata: Added-country_isbn-for-Italy
2437 [21795] localedata: Add/Fix country_isbn for France
2438 [21796] localedata: Added country_isbn for Republic of Korea
2439 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2440 [21799] localedata: Added int_select international_call_prefixes
2441 [21801] localedata: Added int_select international_call_prefixes
2442 [21804] nptl: Double semicolon in thread-shared-types.h
2443 [21807] localedata: LC_ADDRESS fix for pap_CW
2444 [21808] localedata: Fix LC_ADDRESS for pap_AW
2445 [21821] localedata: Added country_name in mai_IN
2446 [21822] localedata: Fix LC_TIME for mai_IN
2447 [21823] localedata: missing yesstr, nostr for sa_IN
2448 [21825] localedata: Fix name_mrs for mag_IN
2449 [21828] localedata: 2.26 changelog should mention user visible changes
2451 [21835] localedata: Added Maithili language locale for Nepal
2452 [21838] localedata: Removed redundant data for the_NP
2453 [21839] localedata: Fix LC_MONETARY for ta_LK
2454 [21844] localedata: Fix Latin characters and Months Sequence.
2455 [21848] localedata: Fix mai_NP Title Name
2460 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2461 24731-2:2010, is supported to enable declarations of functions from that
2462 TR. Note that not all functions from that TR are supported by the GNU C
2465 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2466 18661-1:2014, is supported to enable declarations of functions and macros
2467 from that TS. Note that not all features from that TS are supported by
2470 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2471 18661-4:2015, is supported to enable declarations of functions and macros
2472 from that TS. Note that most features from that TS are not supported by
2475 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2476 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2477 Since the GNU C Library defaults to a much newer revision of POSIX, this
2478 will only affect programs that specifically request an old conformance
2479 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2480 see a change in the visible declarations, but a program compiled with
2481 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2484 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2485 defined by all multithreaded code, but glibc has not required this for
2488 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2489 means that in a future release, the macros “major”, “minor”, and “makedev”
2490 will only be available from <sys/sysmacros.h>.
2492 These macros are not part of POSIX nor XSI, and their names frequently
2493 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2494 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2495 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2498 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2499 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2500 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2502 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2503 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2504 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2505 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2506 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2507 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2508 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2509 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2510 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2511 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2512 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2515 * New <math.h> features are added from TS 18661-1:2014:
2517 - Signaling NaN macros: SNANF, SNAN, SNANL.
2519 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2520 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2521 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2523 - llogb functions: the llogb, llogbf and llogbl functions, and the
2524 FP_LLOGB0 and FP_LLOGBNAN macros.
2526 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2529 - Comparison macros: iseqsig.
2531 - Classification macros: iscanonical, issubnormal, iszero.
2533 - Total order functions: totalorder, totalorderf, totalorderl,
2534 totalordermag, totalordermagf, totalordermagl.
2536 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2538 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2539 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2541 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2542 are added to libc. They convert a floating-point number into string.
2544 * Most of glibc can now be built with the stack smashing protector enabled.
2545 It is recommended to build glibc with --enable-stack-protector=strong.
2546 Implemented by Nick Alcock (Oracle).
2548 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2549 intended to be used instead of memset() to erase sensitive data after use;
2550 the compiler will not optimize out calls to explicit_bzero even if they
2551 are "unnecessary" (in the sense that no _correct_ program can observe the
2552 effects of the memory clear).
2554 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2555 to float instead of double. This does not affect the ABI of any libraries
2556 that are part of the GNU C Library, but may affect the ABI of other
2557 libraries that use this type in their interfaces.
2559 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2560 float_t and double_t types are now defined to long double instead of float
2561 and double. These options are not the default, and this does not affect
2562 the ABI of any libraries that are part of the GNU C Library, but it may
2563 affect the ABI of other libraries that use this type in their interfaces,
2564 if they are compiled or used with those options.
2566 * The getentropy and getrandom functions, and the <sys/random.h> header file
2569 * The buffer size for byte-oriented stdio streams is now limited to 8192
2570 bytes by default. Previously, on Linux, the default buffer size on most
2571 file systems was 4096 bytes (and thus remains unchanged), except on
2572 network file systems, where the buffer size was unpredictable and could be
2573 as large as several megabytes.
2575 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2576 for the Linux quota interface which predates kernel version 2.4.22 has
2579 * The malloc_get_state and malloc_set_state functions have been removed.
2580 Already-existing binaries that dynamically link to these functions will
2581 get a hidden implementation in which malloc_get_state is a stub. As far
2582 as we know, these functions are used only by GNU Emacs and this change
2583 will not adversely affect already-built Emacs executables. Any undumped
2584 Emacs executables, which normally exist only during an Emacs build, should
2585 be rebuilt by re-running “./configure; make” in the Emacs build tree.
2587 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
2588 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2589 “no-ip6-dotint” had already been the default, and support for the
2590 “ip6-dotint” option was removed from the Internet in 2006.
2592 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2593 flag from <resolv.h> have been removed. The option relied on a
2594 backwards-incompatible DNS extension which was never deployed on the
2597 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2598 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2599 They were already unimplemented.
2601 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2602 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2603 removed again from the IETF name lookup interface specification in RFC
2604 2553. Applications should use getaddrinfo instead.
2606 * DNSSEC-related declarations and definitions have been removed from the
2607 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2608 decode the data part of DNSSEC record types. Previous versions of glibc
2609 only implemented minimal support for the previous version of DNSSEC, which
2610 is incompatible with the currently deployed version.
2612 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2613 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2614 <arpa/nameser.h> header file because the distinction between RR types and
2615 meta-RR types is not officially standardized, subject to revision, and
2616 thus not suitable for encoding in a macro.
2618 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2619 and rhook members of the res_state type in <resolv.h> have been removed.
2620 The glibc stub resolver did not support these hooks, but the header file
2621 did not reflect that.
2623 * For multi-arch support it is recommended to use a GCC which has
2624 been built with support for GNU indirect functions. This ensures
2625 that correct debugging information is generated for functions
2626 selected by IFUNC resolvers. This support can either be enabled by
2627 configuring GCC with '--enable-gnu-indirect-function', or by
2628 enabling it by default by setting 'default_gnu_indirect_function'
2629 variable for a particular architecture in the GCC source file
2632 * GDB pretty printers have been added for mutex and condition variable
2633 structures in POSIX Threads. When installed and loaded in gdb these pretty
2634 printers show various pthread variables in human-readable form when read
2635 using the 'print' or 'display' commands in gdb.
2637 * Tunables feature added to allow tweaking of the runtime for an application
2638 program. This feature can be enabled with the '--enable-tunables' configure
2639 flag. The GNU C Library manual has details on usage and README.tunables has
2640 instructions on adding new tunables to the library.
2642 * A new version of condition variables functions have been implemented in
2643 the NPTL implementation of POSIX Threads to provide stronger ordering
2646 * A new version of pthread_rwlock functions have been implemented to use a more
2647 scalable algorithm primarily through not using a critical section anymore to
2650 Security related changes:
2652 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2653 have been created with makecontext could fail to terminate due to a
2654 missing .cantunwind annotation. This has been observed to lead to a hang
2655 (denial of service) in some Go applications compiled with gccgo. Reported
2656 by Andreas Schwab. (CVE-2016-6323)
2658 * The DNS stub resolver functions would crash due to a NULL pointer
2659 dereference when processing a query with a valid DNS question type which
2660 was used internally in the implementation. The stub resolver now uses a
2661 question type which is outside the range of valid question type values.
2664 The following bugs are resolved with this release:
2666 [4099] stdio: Overly agressive caching by stream i/o functions.
2667 [7065] build: Support building glibc with -fstack-protector or -fstack-
2669 [9842] localedata: en_CA: incorrect date format
2670 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2671 before it started waiting
2672 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2673 [15765] nptl: sem_open is wrongly a cancellation point
2674 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2675 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2677 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2678 library linked with pthread
2679 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2680 "FIXME: Ingo" issue)
2681 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2682 [17252] libc: getrandom and getentropy syscall
2683 [17730] malloc: thread-local storage is sometimes improperly free()'d
2684 after being __libc_memalign()'d
2685 [18241] stdio: failed fseek on memstream does not set errno and can fail
2687 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2689 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2690 PTHREAD_PRIO_INHERIT mutex on ARM
2691 [18784] network: res_query and related function crash for special record
2692 type queries (CVE-2015-5180)
2693 [19380] math: strtod does not raise "inexact"
2694 [19387] string: Integer overflow in memchr
2695 [19390] string: Integer overflow in strncat
2696 [19398] build: linknamespace tests fail with massively parallel build
2697 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2699 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2700 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2701 [19514] libc: [PATCH] Fix spelling errors in spelling
2702 "implement"/"implementation" in several places
2703 [19582] network: Deprecate RES_USE_INET6
2704 [19673] manual: clog10 docs appear to be erroneous
2705 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2706 causes a segmentation fault
2707 [19826] libc: invalid pointer returned from __tls_get_addr with static
2709 [20016] network: resolv: Remove hooks support from the API
2710 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2712 [20033] math: [x86_64] vectorized math function don't call the __finite
2714 [20116] nptl: use after free in pthread_create
2715 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2716 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2718 [20311] nptl: please install proc_service.h
2719 [20366] libc: Compilation errors in installed headers in strict-compliance
2721 [20370] malloc: malloc: Arena free list management is still racy
2722 (incorrect fix in bug 19243)
2723 [20386] libc: assert (X = 0) does not result in GCC warning
2724 [20432] malloc: malloc: Minimize interface required for interposition
2725 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2726 in _Unwind_Backtrace (CVE-2016-6323)
2727 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2728 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2730 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2731 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2732 [20477] network: resolv: incorrect double-checked locking related to
2734 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2736 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2738 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2739 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2740 cause transition penalty
2741 [20517] math: sparcv9 missing fdiml compat symbol
2742 [20524] manual: strverscmp is inconsistent
2743 [20525] libc: <sys/quota.h> should be based on kernel headers
2744 [20539] math: GCC 7 -static -lm fails to link at -O3
2745 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2747 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2749 [20591] network: Remove obsolete DNSSEC support
2750 [20592] network: DNS resource record type classification macros in
2751 <arpa/nameser.h> are incorrect
2752 [20593] network: Update DNS RR type definitions
2753 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2754 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2756 [20629] network: libresolv: Remove support for bitstring labels
2758 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2759 assertion: "maxidx >= 2"
2760 [20660] math: [arm] Use VSQRT
2761 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2762 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2763 [20689] libc: Test for FMA should also check for AVX.
2764 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2765 [20715] math: iszero macro breaks existing code
2766 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2767 [20728] libc: powerpc: Missing TOC stub in clone
2768 [20729] build: glibc-2.24 fails to build for i486 with -Os
2769 [20750] build: Build fails with default PIE enabled gcc-6.x
2770 [20768] math: [alpha] sqrt fegetenv namespace
2771 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2773 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2774 __FLT_EVAL_METHOD__ is 2
2775 [20790] network: rpcgen buffer overrun in get_prog_declaration
2776 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2777 [20829] libc: crypt snprintf namespace
2778 [20847] libc: tst-vfork3 failure
2779 [20855] math: Default bits/mathdef.h has inappropriate float_t
2780 [20859] math: [sh4] FP_ILOGB0 invalid
2781 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2782 U+20AC), not same as GBK
2783 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2784 [20916] math: pow handling of sNaN arguments
2785 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2786 [20919] math: Bad pow (qNaN, 0) result with -lieee
2787 [20940] math: hypot sNaN handling
2788 [20947] math: fmax, fmin sNaN handling
2789 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2790 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2792 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2793 [20973] nptl: robust mutexes: Lost wake-ups
2794 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2795 [20978] nis: strlen on null pointer in nss_nisplus
2796 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2798 [21014] string: i686 memchr overflows internal pointer check
2799 [21019] libc: [mips] n32 lseek incorrect on overflow
2800 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2801 [21026] libc: [MIPS] readahead syscall is broken on n64
2802 [21028] math: Fallback fesetexceptflag should always succeed
2803 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2804 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2806 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2807 [21061] librt: [microblaze] librt lost clock_* exports
2808 [21073] libc: tunables: insecure environment variables passed to
2809 subprocesses with AT_SECURE
2810 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2814 * The minimum Linux kernel version that this version of the GNU C Library
2815 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2816 kernel version 2.6.32 or later suffices (on architectures that already
2817 required kernel versions more recent than 3.2, those requirements remain
2818 unchanged). Linux 3.2 or later kernel headers are required on all
2821 * The pap_AN locale has been deleted. This has been deprecated for a long
2822 time. It has been replaced by pap_AW & pap_CW, both of which have long
2823 been included in previous releases.
2825 * The readdir_r and readdir64_r functions have been deprecated. It is
2826 recommended to use readdir and readdir64 instead.
2828 * The type “union wait” has been removed. It was deprecated in the early
2829 1990s and never part of POSIX. Application code should use the int type
2830 instead of “union wait”.
2832 * A new NSS action is added to facilitate large distributed system
2833 administration. The action, MERGE, allows remote user stores like LDAP
2834 to be merged into local user stores like /etc/groups in order to provide
2835 easy to use, updated, and managed sets of merged credentials. The new
2836 action can be used by configuring it in /etc/nsswitch.conf:
2837 group: files [SUCCESS=merge] nis
2838 Implemented by Stephen Gallagher (Red Hat).
2840 * The deprecated __malloc_initialize_hook variable has been removed from the
2843 * The long unused localedef --old-style option has been removed. It hasn't
2844 done anything in over 16 years. Scripts using this option can safely
2847 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2848 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2849 return the next representable value in the direction of positive infinity
2850 and the nextdown functions return the next representable value in the
2851 direction of negative infinity. These are currently enabled as GNU
2854 Security related changes:
2856 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2857 could result in a stack overflow when getnetbyname was called with an
2858 overly long name. (CVE-2016-3075)
2860 * Previously, getaddrinfo copied large amounts of address data to the stack,
2861 even after the fix for CVE-2013-4458 has been applied, potentially
2862 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2863 instead. Reported by Michael Petlan. (CVE-2016-3706)
2865 * The glob function suffered from a stack-based buffer overflow when it was
2866 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2867 Reported by Alexander Cherepanov. (CVE-2016-1234)
2869 * The Sun RPC UDP client could exhaust all available stack space when
2870 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2871 alloca plugin for GCC. (CVE-2016-4429)
2873 * The IPv6 name server management code in libresolv could result in a memory
2874 leak for each thread which is created, performs a failing naming lookup,
2875 and exits. Over time, this could result in a denial of service due to
2876 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2878 The following bugs are resolved with this release:
2880 [1170] localedata: ne_NP: update Nepali locale definition file
2881 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2883 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2884 [6796] math: fdim() does not set errno on overflow
2885 [10354] libc: posix_spawn should use vfork() in more cases than presently
2886 [11213] localedata: localedata: add copyright disclaimer to locale files
2887 [12143] localedata: chr_US: new Cherokee locale
2888 [12450] localedata: sgs_LT: new locale
2889 [12676] localedata: ln_CD: new locale
2890 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2892 [13304] math: fma, fmaf, fmal produce wrong results
2893 [14259] build: --localedir arg to configure is ignored
2894 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2895 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2896 [14934] localedata: es_CL: wrong first weekday chilean locale
2897 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2899 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2901 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2902 [15368] nptl: raise() is not async-signal-safe
2903 [15479] math: ceil, floor, round and trunc raise inexact exception
2904 [15578] localedata: kk_KZ: various updates
2905 [16003] localedata: pap_AN: punt old locale
2906 [16137] localedata: iw_IL: punt old locale
2907 [16190] localedata: eo: new esperanto locale
2908 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2909 [16742] malloc: race condition: pthread_atfork() called before first
2910 malloc() results in unexpected locking behaviour/deadlocks
2911 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2913 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2914 [17565] localedata: pt_PT: wrong (work-)week start
2915 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2916 [17950] build: Build fails with -msse
2917 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2918 [18433] libc: posix_spawn does not return correctly upon failure to
2920 [18453] localedata: charmaps/IBM875: incorrect codes
2921 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2923 [18896] localedata: he_IL: improvements for currency
2924 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2925 Romanian locale data
2926 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2928 [19056] libc: Deprecate readdir_r
2929 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2931 [19198] localedata: nl_NL: small improvements for Dutch locales
2932 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2933 nameservers (CVE-2016-5417)
2934 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2936 [19400] locale: Language missing in "iso-639.def", trivial fix in
2938 [19431] malloc: Deadlock between fflush, getdelim, and fork
2939 [19505] libc: Incorrect file descriptor validity checks in
2940 posix_spawn_file_actions_add{open,close,dup2}
2941 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2942 when using RTLD_NEXT
2943 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2944 `intl/{gettextP,loadinfo}.h'
2945 [19534] libc: execle, execlp may use malloc
2946 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2947 [19573] network: res_nclose and __res_maybe_init disagree about name
2948 server initialization, breaking Hesiod
2949 [19575] localedata: Status of GB18030 tables
2950 [19581] localedata: sr_* date_fmt string contains additional newline
2951 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2953 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2954 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2955 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2956 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2958 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2960 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2962 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2963 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2964 [19633] locale: strfmon_l applies global locale to number formatting
2965 [19642] network: Memory leak in getnameinfo
2966 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2967 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2969 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2970 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2972 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2973 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2975 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2977 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2979 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2980 pointers and lengths in error-case.
2981 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2982 report errors on UTF-16 surrogates values.
2983 [19755] nscd: nscd assertion failure in gc
2984 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2985 [19759] libc: mempcpy shouldn't be inlined
2986 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2987 [19765] libc: s390 needs an optimized mempcpy
2988 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2989 NAME_MAX limit assumption (CVE-2016-1234)
2990 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2991 [19787] network: Missing and incorrect truncation checks in getnameinfo
2992 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2994 [19791] network: Assertion failure in res_query.c with un-connectable name
2996 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2997 [19822] math: libm.so install clobbers old version
2998 [19825] network: resolv: send_vc can return uninitialized data in second
2999 response to getaddrinfo
3000 [19830] network: nss_dns: should check RDATA length against buffer length
3001 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
3002 confronted with A/AAAA records of invalid size
3003 [19837] nss: nss_db: No retries for some long lines with a larger buffer
3004 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
3005 [19853] stdio: Printing IBM long double in decimal with high precision is
3007 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
3008 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
3009 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
3011 [19865] network: Assertion failure or memory leak in
3012 _nss_dns_getcanonname_r
3013 [19868] network: nss_dns: netent code does not skip over non-PTR records
3014 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
3016 [19881] string: Improve x86-64 memset
3017 [19907] string: Incorrect memcpy tests
3018 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
3020 [19925] libc: termios.h XCASE namespace
3021 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
3022 [19929] libc: limits.h NL_NMAX namespace
3023 [19931] stdio: Memory leak in vfprintf
3024 [19957] libc: clone(CLONE_VM) access invalid parent memory
3025 [19963] localedata: en_IL: New locale
3026 [19989] stdio: stdio.h cuserid namespace
3027 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
3029 [19996] locale: langinfo.h nl_langinfo_l namespace
3030 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
3031 [20010] network: getaddrinfo: Stack overflow in hostent translation
3033 [20012] stdio: libio: fmemopen append mode failure
3034 [20014] stdio: stdio.h namespace for pre-threads POSIX
3035 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
3036 [20023] libc: fcntl.h timespec namespace
3037 [20024] math: [x86_64] vectorized sincos trashes the stack
3038 [20031] network: nss_hesiod: Heap overflow in get_txt_records
3039 [20041] time: sys/time.h timespec namespace
3040 [20043] libc: unistd.h missing cuserid for UNIX98 and before
3041 [20044] libc: unistd.h missing pthread_atfork for UNIX98
3042 [20051] libc: ttyslot in wrong header under wrong conditions
3043 [20054] libc: gethostname not declared for XPG4
3044 [20055] libc: termios.h missing tcgetsid for XPG4
3045 [20072] dynamic-link: x86 init_cpu_features is called twice in static
3047 [20073] libc: sys/stat.h fchmod namespace
3048 [20074] libc: stdlib.h rand_r namespace
3049 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
3050 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
3052 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
3053 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
3055 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
3056 [20119] libc: Wrong mask for processors level type from CPUID
3057 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
3058 AS not supporting AVX512
3059 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
3061 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
3062 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
3064 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
3065 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
3066 [20178] libc: posix_spawn{p} should not call exit
3067 [20191] stdio: libio: vtables hardening
3068 [20195] string: FMA4 detection requires CPUID execution with register
3070 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
3071 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
3073 [20212] math: acos (sNaN) returns sNaN
3074 [20213] math: asin (sNaN) returns sNaN
3075 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
3076 [20218] math: [i386] asinhl (sNaN) returns sNaN
3077 [20219] math: [i386] atanhl (sNaN) returns sNaN
3078 [20222] stdio: fopencookie: Mangle function pointers
3079 [20224] math: [i386] cbrtl (sNaN) returns sNaN
3080 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
3081 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
3083 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
3084 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
3085 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
3086 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
3087 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
3088 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
3089 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
3090 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
3091 [20240] math: modf (sNaN) returns sNaN
3092 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
3093 [20250] math: frexp (sNaN) returns sNaN
3094 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
3095 [20255] math: [i386] fdim, fdimf return with excess range and precision /
3097 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
3098 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
3099 subscript is below array bounds [-Werror=array-bounds]
3100 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
3101 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
3103 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
3104 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
3106 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
3107 "invalid" exceptions
3108 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
3109 [20316] localedata: id_ID: Februari instead of Pebruari
3110 [20327] string: POWER8 strcasecmp returns incorrect result
3111 [20347] math: Failure: Test: j0_downward (0xap+0)
3112 [20348] libc: FAIL: misc/tst-preadvwritev64
3113 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
3114 [20350] libc: There is no test for p{read,write}64
3115 [20357] math: Incorrect cos result for 1.5174239687223976
3116 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
3120 * Unicode 8.0.0 Support: Character encoding, character type info, and
3121 transliteration tables are all updated to Unicode 8.0.0, using new
3122 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
3123 These updates cause user visible changes, such as the fixes for bugs
3124 89, 16061, and 18568.
3126 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
3127 kernel-internal CPU set size. This means that requests that change the
3128 CPU affinity which failed before (for example, an all-ones CPU mask) will
3129 now succeed. Applications that need to determine the effective CPU
3130 affinities need to call sched_getaffinity or pthread_getaffinity_np after
3131 setting it because the kernel can adjust it (and the previous size check
3132 would not detect this in the majority of cases).
3134 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
3135 the following new symbols are used: fts64_children, fts64_close,
3136 fts64_open, fts64_read and fts64_set.
3138 * getaddrinfo now detects certain invalid responses on an internal netlink
3139 socket. If such responses are received, an affected process will
3140 terminate with an error message of "Unexpected error <number> on netlink
3141 descriptor <number>" or "Unexpected netlink response of size <number> on
3142 descriptor <number>". The most likely cause for these errors is a
3143 multi-threaded application which erroneously closes and reuses the netlink
3144 file descriptor while it is used by getaddrinfo.
3146 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
3147 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
3148 unnecessary serialization of memory allocation requests across threads.
3149 The defect is now corrected. Users should see a substantial increase in
3150 the concurent throughput of allocation requests for applications which
3151 trigger this bug. Affected applications typically create and
3152 destroy threads frequently. (Bug 19048 was reported and analyzed by
3155 * There is now a --disable-timezone-tools configure option for disabling the
3156 building and installing of the timezone related utilities (zic, zdump, and
3157 tzselect). This is useful for people who build the timezone data and code
3158 independent of the GNU C Library.
3160 * The obsolete header <regexp.h> has been removed. Programs that require
3161 this header must be updated to use <regex.h> instead.
3163 * The obsolete functions bdflush, create_module, get_kernel_syms,
3164 query_module and uselib are no longer available to newly linked binaries;
3165 the header <sys/kdaemon.h> has been removed. These functions and header
3166 were specific to systems using the Linux kernel and could not usefully be
3167 used with the GNU C Library on systems with version 2.6 or later of the
3170 * Optimized string, wcsmbs and memory functions for IBM z13.
3171 Implemented by Stefan Liebler.
3173 * Newly linked programs that define a variable called signgam will no longer
3174 have it set by the lgamma, lgammaf and lgammal functions. Programs that
3175 require signgam to be set by those functions must ensure that they use the
3176 variable provided by the GNU C Library and declared in <math.h>, without
3177 defining their own copy.
3179 * The minimum GCC version that can be used to build this version of the GNU
3180 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
3181 still be used to compile programs using the GNU C Library.
3183 Security related changes:
3185 * An out-of-bounds value in a broken-out struct tm argument to strftime no
3186 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
3188 * The LD_POINTER_GUARD environment variable can no longer be used to disable
3189 the pointer guard feature. It is always enabled. Previously,
3190 LD_POINTER_GUARD could be used to disable security hardening in binaries
3191 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
3194 * An integer overflow in hcreate and hcreate_r could lead to an
3195 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
3197 * The catopen function no longer has unbounded stack usage. Reported by
3198 Max. (CVE-2015-8779)
3200 * The nan, nanf and nanl functions no longer have unbounded stack usage
3201 depending on the length of the string passed as an argument to the
3202 functions. Reported by Joseph Myers. (CVE-2014-9761)
3204 * A stack-based buffer overflow was found in libresolv when invoked from
3205 libnss_dns, allowing specially crafted DNS responses to seize control
3206 of execution flow in the DNS client. The buffer overflow occurs in
3207 the functions send_dg (send datagram) and send_vc (send TCP) for the
3208 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
3209 family. The use of AF_UNSPEC triggers the low-level resolver code to
3210 send out two parallel queries for A and AAAA. A mismanagement of the
3211 buffers used for those queries could result in the response of a query
3212 writing beyond the alloca allocated buffer created by
3213 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
3214 the overflow. Thanks to the Google Security Team and Red Hat for
3215 reporting the security impact of this issue, and Robert Holiday of
3216 Ciena for reporting the related bug 18665. (CVE-2015-7547)
3218 The following bugs are resolved with this release:
3220 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
3221 [887] math: Math library function "logb" and "nextafter" inconsistent
3222 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
3223 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
3224 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
3225 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
3227 [4404] localedata: German translation of "Alarm clock" is misleading
3228 [6799] math: nextafter() and nexttoward() doen't set errno on
3229 overflow/underflow errors
3230 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3232 [10432] nis: _nss_nis_setnetgrent assertion failure
3233 [11460] libc: fts has no LFS support
3234 [12926] network: getaddrinfo()/make_request() may spin forever
3235 [13065] nptl: Race condition in pthread barriers
3236 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3237 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3239 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3240 [14912] libc: Rename non-installed bits/*.h headers
3241 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3242 [15367] math: Let gcc use __builtin_isinf
3243 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3244 [15421] math: lgamma wrongly sets signgam for ISO C
3245 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3246 FE_INVALID with argument out of range
3247 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3249 [15786] dynamic-link: ifunc resolver functions can smash function
3251 [15918] math: Unnecessary check for equality in hypotf()
3252 [16061] localedata: Review / update transliteration data
3253 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3255 [16141] time: strptime %z offset restriction
3256 [16171] math: drem should be alias of remainder
3257 [16296] math: fegetround is pure?
3258 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3259 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3261 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3262 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3264 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3265 "Exception "Inexact" set" on ppc32
3266 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3267 [16517] math: Missing underflow exception from tanf/tan/tanl
3268 [16519] math: Missing underflow exception from sinhf
3269 [16520] math: Missing underflow exception from tanhf
3270 [16521] math: Missing underflow exception from exp2
3271 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3273 [16734] stdio: fopen calls mmap to allocate its buffer
3274 [16961] math: nan function incorrect handling of bad sequences
3275 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3276 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3277 [16985] locale: localedef: confusing error message when opening output
3279 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3280 [17197] locale: Redundant shift character in iconv conversion output at
3282 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3283 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3284 [17250] dynamic-link: static linking breaks nss loading
3285 (getaddrinfo/getpwnam/etc...)
3286 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3288 [17441] math: isnan() should use __builtin_isnan() in GCC
3289 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3290 (related to lock elision)
3291 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3292 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3293 [17887] time: strptime should be able to parse "+01:00" style timezones
3294 [17905] libc: catopen() Multiple unbounded stack allocations
3296 [18084] libc: backtrace (..., 0) dumps core on x86
3297 [18086] libc: nice() sets errno to 0 on success
3298 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3299 is too large (CVE-2015-8778)
3300 [18251] dynamic-link: SONAME missing when audit modules provides path
3301 [18265] libc: add attributes for wchar string and memory functions
3302 [18370] math: csqrt missing underflows
3303 [18421] libc: [hppa] read-only segment has dynamic relocations
3304 [18472] libc: Obsolete syscall wrappers should be compat symbols
3305 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3306 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3307 [18525] localedata: Remove locale timezone information
3308 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3309 [18568] localedata: Update locale data to Unicode 8.0
3310 [18589] locale: sort-test.sh fails at random
3311 [18595] math: ctan, ctanh missing underflows
3312 [18604] libc: assert macro-expands its argument
3313 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3314 contains a vector instruction exception.
3315 [18611] math: j1, jn missing errno setting on underflow
3316 [18618] localedata: sync Chechen locale definitions with other *_RU
3318 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3319 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3320 [18665] network: In send_dg, the recvfrom function is NOT always using the
3321 buffer size of a newly created buffer (CVE-2015-7547)
3322 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3324 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3326 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3327 [18699] math: tilegx cproj() for various complex infinities does not yield
3329 [18724] libc: Harden put*ent functions against data injection
3330 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3331 [18755] build: build errors with -DNDEBUG
3332 [18757] stdio: fmemopen fails to set errno on failure
3333 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3335 [18781] libc: openat64 lacks O_LARGEFILE
3336 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3337 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3338 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3339 [18790] math: [ldbl-128ibm] tanhl inaccurate
3340 [18795] libc: stpncpy fortification misses buffer lengths that are
3341 statically too large
3342 [18796] build: build fails for --disable-mathvec
3343 [18803] math: hypot missing underflows
3344 [18820] stdio: fmemopen may leak memory on failure
3345 [18823] math: csqrt spurious underflows
3346 [18824] math: fma spurious underflows
3347 [18825] math: pow missing underflows
3348 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3349 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3350 [18870] build: sem_open.c fails to compile with missing symbol
3352 [18872] stdio: Fix memory leak in printf_positional
3353 [18873] libc: posix_fallocate overflow check ineffective
3354 [18875] math: Excess precision leads incorrect libm
3355 [18877] libc: arm: mmap offset regression
3356 [18887] libc: memory corruption when using getmntent on blank lines
3357 [18918] localedata: hu_HU: change time to HH:MM:SS format
3358 [18921] libc: Regression: extraneous stat() and fstat() performed by
3360 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3361 binaries (CVE-2015-8777)
3362 [18951] math: tgamma missing underflows
3363 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3365 [18953] localedata: lt_LT: change currency symbol to the euro
3366 [18956] math: powf inaccuracy
3367 [18961] math: [i386] exp missing underflows
3368 [18966] math: [i386] exp10 missing underflows
3369 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3370 [18969] build: multiple string test failures due to missing locale
3372 [18970] libc: Reference of pthread_setcancelstate in libc.a
3373 [18977] math: float / long double Bessel functions not in XSI POSIX
3374 [18980] math: i386 libm functions return with excess range and precision
3375 [18981] math: i386 scalb*, ldexp return with excess range and precision
3376 [18982] stdio: va_list and vprintf
3377 [18985] time: Passing out of range data to strftime() causes a segfault
3379 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3380 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3381 [19012] locale: iconv_open leaks memory on error path
3382 [19016] math: clog, clog10 inaccuracy
3383 [19018] nptl: Mangle function pointers in tls_dtor_list
3384 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3385 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3386 [19048] malloc: malloc: arena free list can become cyclic, increasing
3388 [19049] math: [powerpc] erfc incorrect zero sign
3389 [19050] math: [powerpc] log* incorrect zero sign
3390 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3391 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3392 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3393 [19074] network: Data race in _res_hconf_reorder_addrs
3394 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3395 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3396 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3398 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3400 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3401 [19086] manual: posix_fallocate64 documented argument order is wrong.
3402 [19088] math: lround, llround missing exceptions close to overflow
3404 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3405 [19095] math: dbl-64 lrint incorrect for 64-bit long
3406 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3407 [19124] dynamic-link: ld.so failed to build with older assmebler
3408 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3409 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3410 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3411 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3412 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3413 pthread_setaffinity_np
3414 [19156] math: [ldbl-128] j0l spurious underflows
3415 [19164] nptl: tst-getcpu fails with many possible CPUs
3416 [19168] math: math/test-ildoubl and math/test-ldouble failure
3417 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3418 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3420 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3421 (FE_NOMASK_ENV) do not clear SSE exceptions
3422 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3423 _int_new_arena/reused_arena
3424 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3425 [19201] math: dbl-64 remainder incorrect sign of zero result
3426 [19205] math: bits/math-finite.h conditions do not match math.h and
3428 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3429 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3430 for C99-based standards
3431 [19212] libc: features.h not -Wundef clean
3432 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3434 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3435 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3436 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3438 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3439 "inexact" exceptions
3440 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3442 [19242] libc: strtol incorrect in Turkish locales
3443 [19243] malloc: reused_arena can pick an arena on the free list, leading
3444 to an assertion failure and reference count corruption
3445 [19253] time: tzset() ineffective when temporary TZ did not include DST
3447 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3448 [19270] math: [hppa] Shared libm missing __isnanl
3449 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3450 MAP_HUGETLB and MAP_STACK defines
3451 [19313] nptl: Wrong __cpu_mask for x32
3452 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3453 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3454 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3455 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3456 [19363] time: x32: times() return value wrongly truncates/sign extends
3458 [19367] dynamic-link: Improve branch prediction on Silvermont
3459 [19369] network: Default domain name not reset by res_ninit when "search"
3460 / "domain" entry is removed from resolv.conf
3461 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3463 [19385] localedata: bg_BG: time separator should be colon, not comma
3464 [19408] libc: linux personality syscall wrapper may erroneously return an
3465 error on 32-bit architectures
3466 [19415] libc: dladdr returns wrong names on hppa
3467 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3468 IBM905, IBM907, and IBM909
3469 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3470 [19443] build: build failures with -DDEBUG
3471 [19451] build: Make check fails on test-double-vlen2
3472 [19462] libc: Glibc failed to build with -Os
3473 [19465] math: Wrong code with -Os
3474 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3476 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3478 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3479 [19486] math: S390: Math tests fail with "Exception Inexact set".
3480 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3481 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3483 [19590] math: Fail to build shared objects that use libmvec.so functions.
3487 * The following bugs are resolved with this release:
3489 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3490 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3491 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3492 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3493 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3494 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3495 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3496 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3497 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3498 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3499 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3500 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3501 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3502 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3503 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3504 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3505 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3506 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3507 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3508 18657, 18676, 18694, 18696, 18887.
3510 * Cache information can be queried via sysconf() function on s390 e.g. with
3511 _SC_LEVEL1_ICACHE_SIZE as argument.
3513 * A buffer overflow in gethostbyname_r and related functions performing DNS
3514 requests has been fixed. If the NSS functions were called with a
3515 misaligned buffer, the buffer length change due to pointer alignment was
3516 not taken into account. This could result in application crashes or,
3517 potentially arbitrary code execution, using crafted, but syntactically
3518 valid DNS responses. (CVE-2015-1781)
3520 * The time zone file parser has been made more robust against crafted time
3521 zone files, avoiding heap buffer overflows related to the processing of
3522 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3523 large time zone data files. Overly long time zone specifiers in the TZ
3524 variable no longer result in stack overflows and crashes.
3526 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3527 for LD and GD on x86 and x86-64, has been implemented. You will need
3528 binutils-2.24 or later to enable this optimization.
3530 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3531 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3532 Hat). These updates cause user visible changes, such as the fix for bug
3535 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3536 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3537 condition in some applications.
3539 * Added vector math library named libmvec with the following vectorized x86_64
3540 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3542 The library can be disabled with --disable-mathvec. Use of the functions is
3543 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3544 Shared library libmvec.so is linked in as needed when using -lm (no need to
3545 specify -lmvec explicitly for not static builds).
3546 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3548 * A new fmemopen implementation has been added with the goal of POSIX
3549 compliance. The new implementation fixes the following long-standing
3550 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3551 old implementation is still present for use be by existing binaries.
3553 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3554 releases. It has been fixed to match 2.19 and older, but binaries built
3555 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3557 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3558 Contributed by Roland McGrath (Google).
3560 * The header <regexp.h> is deprecated, and will be removed in a future
3561 release. Use of this header will trigger a deprecation warning.
3562 Application developers should update their code to use <regex.h> instead.
3564 This header was formerly part of SUS, but was deprecated in 1994 and
3565 removed from the standard in 2001. Also, the glibc implementation
3566 leaks memory. See BZ#18681 for more details.
3570 * The following bugs are resolved with this release:
3572 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3573 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3574 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3575 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3576 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3577 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3578 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3579 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3580 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3581 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3584 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3585 too little memory for the to-be-scanned arguments and overflow the
3586 allocated buffer. The implementation now correctly computes the required
3587 buffer size when using malloc, and switches to malloc from alloca as
3590 * A new semaphore algorithm has been implemented in generic C code for all
3591 machines. Previous custom assembly implementations of semaphore were
3592 difficult to reason about or ensure that they were safe. The new version
3593 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3594 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3595 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3597 * Port to Altera Nios II has been contributed by Mentor Graphics.
3599 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3600 implementations for powerpc64/powerpc64le.
3601 Implemented by Adhemerval Zanella (IBM).
3603 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3604 and powerpc64le. This may improve lock scaling of existing programs on
3605 HTM capable systems. The lock elision code is only enabled with
3606 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3607 powerpc will issue a transaction abort on every syscall to avoid side
3608 effects being visible outside transactions.
3610 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3611 AArch64. Contributed by ARM Ltd.
3613 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3615 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3616 under certain input conditions resulting in the execution of a shell for
3617 command substitution when the application did not request it. The
3618 implementation now checks WRDE_NOCMD immediately before executing the
3619 shell and returns the error WRDE_CMDSUB as expected.
3621 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3622 processing format strings with a large number of format specifiers.
3624 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3625 infinite loop if the DNS response contained a PTR record of an unexpected
3628 * The minimum GCC version that can be used to build this version of the GNU
3629 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3630 still be used to compile programs using the GNU C Library.
3632 * The GNU C Library is now built with -Werror by default. This can be
3633 disabled by configuring with --disable-werror.
3635 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3637 * The obsolete sigvec function has been removed. This was the original
3638 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3639 programs have been using instead for about 25 years. Of course, ABI
3640 compatibility for old binaries using sigvec remains intact.
3642 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3643 with newer versions of bison.
3645 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3646 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3647 registers overlay two consecutive single-precision registers. MIPS32R2
3648 introduced a new FPU mode (FR=1) where double-precision registers extend the
3649 corresponding single-precision registers which is incompatible with the
3650 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3651 require the use of FR=1 making a transition necessary. New o32 ABI
3652 extensions enable users to migrate over time from the original o32 ABI
3653 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3654 tracks the ABI of any loaded object and verifies that new objects are
3655 compatible. Mode transitions will also be requested as required and
3656 unsupportable objects will be rejected. The ABI checks include both soft and
3657 hard float ABIs for o32, n32 and n64.
3659 GCC 5 with GNU binutils 2.25 onwards:
3660 It is strongly recommended that all o32 system libraries are built using the
3661 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3662 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3663 compiler using --with-fp-32=xx to set this by default.
3667 * The following bugs are resolved with this release:
3669 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3670 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3671 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3672 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3673 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3674 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3675 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3676 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3677 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3678 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3679 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3680 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3681 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3682 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3683 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3685 * Reverted change of ABI data structures for s390 and s390x:
3686 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3687 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3688 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3689 are preserved pointing straight to the same implementation as the old ones.
3690 Given that, new callers will simply provide a too-big buffer to these
3691 functions. Any applications/libraries out there that embed jmp_buf or
3692 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3693 against 2.19 headers will have to rebuilt again. This is necessary in any
3694 case to revert the breakage in their ABI caused by the glibc change.
3696 * Support for file description locks is added to systems running the
3697 Linux kernel. The standard file locking interfaces are extended to
3698 operate on file descriptions, not file descriptors, via the use of
3699 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3700 are associated with an open file instead of a process.
3702 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3704 * The minimum Linux kernel version that this version of the GNU C Library
3705 can be used with is 2.6.32.
3707 * Running the testsuite no longer terminates as soon as a test fails.
3708 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3709 with PASS or FAIL lines for individual tests. A summary of the results is
3710 printed, including a list of failing lists, and "make check" exits with
3711 error status if there were any unexpected failures. "make check
3712 stop-on-test-failure=y" may be used to keep the old behavior.
3714 * The am33 port, which had not worked for several years, has been removed
3717 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3718 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3719 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3720 conflicted with POSIX (support for which was removed in 2.19), the
3721 interfaces those macros enabled remain available when compiling with
3722 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3723 test macros defined.
3725 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3727 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3728 This may improve lock scaling of existing programs on TX capable systems.
3729 The lock elision code is only built with --enable-lock-elision=yes and
3730 then requires a GCC version supporting the TX builtins. With lock elision
3731 default mutexes are elided via __builtin_tbegin, if the cpu supports
3732 transactions. By default lock elision is not enabled and the elision code
3735 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3736 copy the path argument. This allowed programs to cause posix_spawn to
3737 deference a dangling pointer, or use an unexpected pathname argument if
3738 the string was modified after the posix_spawn_file_actions_addopen
3741 * All supported architectures now use the main glibc sysdeps directory
3742 instead of some being in a separate "ports" directory (which was
3743 distributed separately before glibc 2.17).
3745 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3746 On configurations that support it (all Linux configurations), it's now
3747 used regardless of the --enable-add-ons switch to configure. It is no
3748 longer possible to build such configurations without pthreads support.
3750 * Locale names, including those obtained from environment variables (LANG
3751 and the LC_* variables), are more tightly checked for proper syntax.
3752 setlocale will now fail (with EINVAL) for locale names that are overly
3753 long, contain slashes without starting with a slash, or contain ".." path
3754 components. (CVE-2014-0475) Previously, some valid locale names were
3755 silently replaced with the "C" locale when running in AT_SECURE mode
3756 (e.g., in a SUID program). This is no longer necessary because of the
3759 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3760 with application code using Intel MPX instructions. (With all previous
3761 versions, the MPX register state could be clobbered when making calls
3762 into or out of a shared library.) Note that while the new dynamic
3763 linker is compatible with all known x86 hardware whether or not it
3764 supports Intel MPX, some x86 instruction-set emulators might fail to
3765 handle the new instruction encodings. This is known to affect Valgrind
3766 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3767 release), and might affect other tools that do instruction emulation.
3769 * Support for loadable gconv transliteration modules has been removed.
3770 The support for transliteration modules has been non-functional for
3771 over a decade, and the removal is prompted by security defects. The
3772 normal gconv conversion modules are still supported. Transliteration
3773 with //TRANSLIT is still possible, and the //IGNORE specifier
3774 continues to be supported. (CVE-2014-5119)
3776 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3777 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3778 resulting a denial-of-service security vulnerability in applications which
3779 use functions related to iconv. (CVE-2014-6040)
3783 * The following bugs are resolved with this release:
3785 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3786 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3787 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3788 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3789 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3790 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3791 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3792 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3793 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3794 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3795 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3796 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3797 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3798 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3799 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3800 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3801 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3802 16431, 16453, 16474, 16506, 16510, 16529
3804 * Slovenian translations for glibc messages have been contributed by the
3805 Translation Project's Slovenian team of translators.
3807 * The public headers no longer use __unused nor __block. This change is to
3808 support compiling programs that are derived from BSD sources and use
3809 __unused internally, and to support compiling with Clang's -fblock
3810 extension which uses __block.
3812 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3813 large collation sequences to optimize multiple passes. This cache
3814 computation may overflow for large collation sequences and may cause a
3815 stack or buffer overflow. This is now fixed to use a slower algorithm
3816 which does not use a cache if there is an integer overflow.
3818 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3819 rules for large collation sequences to optimize multiple passes and falls
3820 back to alloca if malloc fails, resulting in a possible stack overflow.
3821 The implementation now falls back to an uncached collation sequence lookup
3824 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3825 initialized for static applications resulting in the security feature
3826 being disabled. The pointer guard is now correctly initialized to a
3827 random value for static applications. Existing static applications need
3828 to be recompiled to take advantage of the fix (bug 15754).
3830 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3831 to the d_name member of struct dirent, or omit the terminating NUL
3832 character. (Bugzilla #14699).
3834 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3835 aligned_alloc functions could allocate too few bytes or corrupt the
3836 heap when passed very large allocation size values (Bugzilla #15855,
3839 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3840 for AF_INET6 has been fixed (Bugzilla #16072).
3842 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3843 pap_CW, quz_PE, the_NP.
3845 * Substantially revised locales: gd_GB, ht_HT
3847 * The LC_ADDRESS field was updated to support country_car for almost all
3850 * ISO 1427 definitions were updated.
3852 * ISO 3166 definitions were updated.
3854 * The localedef utility now supports --big-endian and --little-endian
3855 command-line options to generate locales for a different system from that
3856 for which the C library was built.
3858 * Binary locale files now only depend on the endianness of the system for
3859 which they are generated and not on other properties of that system. As a
3860 consequence, binary files generated with new localedef may be incompatible
3861 with old versions of the GNU C Library, and binary files generated with
3862 old localedef may be incompatible with this version of the GNU C Library,
3863 in the following circumstances:
3865 + Locale files may be incompatible on m68k systems.
3867 + Locale archive files (but not separate files for individual locales) may
3868 be incompatible on systems where plain "char" is signed.
3870 * The configure option --disable-versioning has been removed. Builds with
3871 --disable-versioning had not worked for several years.
3873 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3874 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3876 * SystemTap probes for malloc have been introduced.
3878 * SystemTap probes for slow multiple precision fallback paths of
3879 transcendental functions have been introduced.
3881 * Support for powerpc64le has been added.
3883 * The soft-float powerpc port now supports e500 processors.
3885 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3887 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3888 set of header declarations that are enabled by default, even when other
3889 feature test macros or compiler options such as -std=c99 would otherwise
3890 disable some of those declarations.
3892 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3893 conflict with POSIX. The libbsd-compat library (which was a dummy library
3894 that did nothing) has also been removed.
3896 * Preliminary documentation about Multi-Thread, Async-Signal and
3897 Async-Cancel Safety has been added.
3899 * Change of ABI data structures for s390 and s390x:
3900 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3901 allow for future hardware extensions. All library functions that accept or
3902 return these structures were versioned in order to provide backwards
3903 compatibility with existing code. However, not all cases can be handled
3904 with interface versioning. If an application embeds either structure into
3905 another structure and that structure is passed to another compilation unit
3906 which expects the newer larger-sized object then any access to the new
3907 fields will result in undefined behaviour. Similarly any access to fields
3908 that were moved by the enlarging of the structures will cause undefined
3909 behaviour. To fix the undefined behaviour all objects that are part of the
3910 final in-memory image must agree on the size of structures, and this may
3911 require recompilation.
3915 * The following bugs are resolved with this release:
3917 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3918 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3919 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3920 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3921 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3922 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3923 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3924 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3925 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3926 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3927 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3928 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3929 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3932 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3933 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3934 Distributions can re-enable building and using pt_chown via the new configure
3935 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3936 considerable security risks and should only be used if the distribution
3937 understands and accepts the risks.
3939 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3942 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3943 fixed (Bugzilla #15330).
3945 * Add support for calling C++11 thread_local object destructors on thread
3946 and program exit. This needs compiler support for offloading C++11
3947 destructor calls to glibc.
3949 * Improved worst case performance of libm functions with double inputs and
3952 * Support for priority inherited mutexes in pthread condition variables on
3953 non-x86 architectures.
3955 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3957 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3959 * Optimized string functions for ARM. Implemented by Will Newton and
3962 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3964 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3967 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3968 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3970 * Added a benchmark framework to track performance of functions in glibc.
3972 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3973 It is based on draft TS 18661 and currently enabled as a GNU extension.
3975 * On Linux, the clock function now uses the clock_gettime system call
3976 for improved precision, rather than old times system call.
3978 * Added support for version-3 tz format files. This is needed when using
3979 the tz database release 2013e or later, and affects a few unusual cases --
3980 currently only TZ='America/Godthab' for time stamps after 2037.
3982 * Added new API functions pthread_getattr_default_np and
3983 pthread_setattr_default_np to get and set the default pthread
3984 attributes of a process.
3986 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3987 This may improve lock scaling of existing programs on TSX capable systems.
3988 When the --enable-lock-elision=yes parameter is specified at configure
3989 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3992 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3993 availability). Implemented by Ryan S. Arnold.
3995 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3999 * The following bugs are resolved with this release:
4001 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
4002 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
4003 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
4004 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
4005 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
4006 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
4007 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
4008 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
4009 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
4010 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
4011 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
4012 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
4013 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
4014 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
4015 14879, 14889, 14893, 14898, 14914.
4017 * Optimization of memcpy for MIPS.
4019 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
4020 EMFILE has been fixed (Bugzilla #14889).
4022 * The add-on ports collection is now distributed in the "ports" subdirectory
4023 of the main GNU C Library distribution, rather than separately.
4025 * Port to ARM AArch64 contributed by Linaro.
4027 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
4028 Optimized versions of memcpy, memset, and memcmp added for System z10 and
4030 Implemented by Andreas Krebbel.
4032 * The new function secure_getenv allows secure access to the environment,
4033 returning NULL if running in a SUID/SGID process. This function replaces
4034 the internal function __secure_getenv.
4036 * SystemTap static probes have been added into the dynamic linker.
4037 Implemented by Gary Benson.
4039 * Optimizations of string functions strstr, strcasestr and memmem.
4040 Implemented by Maxim Kuvyrkov.
4042 * The minimum Linux kernel version that this version of the GNU C Library
4043 can be used with is 2.6.16.
4045 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
4046 powerpc POWER7. Implemented by Will Schmidt.
4048 * New configure option --disable-nscd builds the C library such that it
4049 never attempts to contact the Name Service Caching Daemon (nscd).
4050 New configure option --disable-build-nscd avoids building nscd itself;
4051 this is the default if --disable-nscd is used.
4053 * Improved support for cross-compilation, including cross-testing and
4054 bootstrap builds without a previously built glibc.
4056 * Several testsuite tests are now able to test multiple IFUNC variants of an
4057 interface, rather than just testing the one that would be chooen by
4060 * New configure options --with-bugurl and --with-pkgversion, for
4061 distributors to use to embed their bug-reporting and package version
4062 information in --help and --version output.
4064 * The ttyname and ttyname_r functions on Linux now fall back to searching for
4065 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
4066 allows creation of chroots without the procfs mounted on /proc.
4068 * The `crypt' function now fails if passed salt bytes that violate the
4069 specification for those values. On Linux, the `crypt' function will
4070 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
4071 enabled, and fail on encrypted strings using the MD5 or DES algorithm
4072 when the mode is enabled.
4074 * The `clock_*' suite of functions (declared in <time.h>) is now available
4075 directly in the main C library. Previously it was necessary to link with
4076 -lrt to use these functions. This change has the effect that a
4077 single-threaded program that uses a function such as `clock_gettime' (and
4078 is not linked with -lrt) will no longer implicitly load the pthreads
4079 library at runtime and so will not suffer the overheads associated with
4080 multi-thread support in other code such as the C++ runtime library.
4082 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
4087 * The following bugs are resolved with this release:
4089 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
4090 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
4091 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
4092 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
4093 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
4094 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
4095 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
4096 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
4097 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
4098 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
4099 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
4100 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
4101 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
4102 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
4103 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
4104 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
4105 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
4106 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
4107 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
4108 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
4109 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
4110 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
4113 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
4114 configuring glibc with:
4115 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
4116 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
4117 Implemented by H.J. Lu.
4121 + define static_assert
4123 + do not declare gets
4125 + declare at_quick_exit and quick_exit also for ISO C11
4127 + aligned_alloc. NB: The code is deliberately allows the size parameter
4128 to not be a multiple of the alignment. This is a moronic requirement
4129 in the standard but it is only a requirement on the caller, not the
4132 + timespec_get added
4134 + uchar.h support added
4136 + CMPLX, CMPLXF, CMPLXL added
4138 Implemented by Ulrich Drepper.
4140 * Support for the IA-64 has been moved to ports.
4142 * Remove support for anything but ELF binary format
4144 * Checking versions of poll, ppoll added.
4145 Implemented by Ulrich Drepper.
4147 * More generic and 64-bit performance optimizations to math functions.
4148 Implemented by Ulrich Drepper.
4150 * New configure option --enable-obsolete-rpc makes the deprecated RPC
4151 headers and functions available at compile time as they were before
4152 version 2.14. This option will be removed at some time in the future
4153 after the TI-RPC library becomes fully sufficient for the needs of
4154 existing applications.
4156 * Compatibility code for Linux kernel versions before 2.4 has been removed.
4157 Note that glibc is not expected to work with any Linux kernel version
4160 * New header <sys/auxv.h> and function getauxval allowing easy access to
4161 the AT_* key-value pairs passed from the Linux kernel. The header also
4162 defines the HWCAP_* bits associated with the AT_HWCAP key.
4164 * New locales: mag_IN
4166 * New configure option --enable-systemtap builds SystemTap static probes
4167 into libc for setjmp and longjmp and into libpthread for various operations.
4168 So far the setjmp/longjmp probes and some of the libpthread probes are
4169 provided only for i*86 and x86_64.
4170 Implemented by Roland McGrath and Rayson Ho.
4172 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
4174 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
4177 * More optimized functions for SPARC. Implemented by David S. Miller.
4179 * Improved support for cross-compilation, especially bootstrap builds
4180 without a previously built glibc.
4182 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
4183 Chris Metcalf from Tilera.
4185 * Support for the old ARM ABI has been removed from ports. Only the EABI is
4186 now supported for ARM processors.
4188 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
4189 as the name of the dynamic linker, to distinguish it from the
4190 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
4192 * Support for CRIS has been removed from ports.
4194 * A new class of installed header has been documented for low-level
4195 platform-specific functionality. PowerPC added the first instance with a
4196 function to provide time base register access. Contributed by Tulio
4197 Magno Quites Machado Filho.
4199 * ix86 configurations now install header files that are consistent with
4200 what x86-64 configurations install. These same header files can be used
4201 for -m32, -m64, or -mx32 builds.
4202 Contributed by H.J. Lu.
4204 * Math library bug fixes. A thorough audit of all open math library bugs was
4205 conducted by Joseph Myers. Significant progress was made on many math
4206 library bugs resulting in more accurate exceptions and function results.
4207 Many thanks to all those that contributed including Andreas Jaeger for his
4208 patch review and work on the x87 trigonometric instruction issues.
4210 * Timezone data is no longer installed. Timezone-related binaries and scripts
4211 will continue to be installed. Users should obtain their timezone data from
4212 their distribution provider or from the tzdata package at
4213 <ftp://munnari.oz.au/pub/>.
4217 * The following bugs are resolved with this release:
4219 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
4220 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
4221 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
4222 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
4223 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
4224 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
4225 13484, 13506, 13515, 13523, 13524, 13538, 13540
4227 * New program pldd to list loaded object of a process
4228 Implemented by Ulrich Drepper.
4230 * Add nss_db support back to glibc. No more dependency on Berkeley db
4231 and support for initgroups lookups.
4232 Implemented by Ulrich Drepper.
4234 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4235 Contributed by HJ Lu.
4237 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4238 Contributed by HJ Lu.
4240 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4241 on x86-32 and x86-64.
4242 Contributed by Liubov Dmitrieva.
4244 * Optimized strchr and strrchr for SSE on x86-32.
4245 Contributed by Liubov Dmitrieva.
4247 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4248 for x86-64 and x86-32.
4249 Contributed by Liubov Dmitrieva.
4251 * New interfaces: scandirat, scandirat64
4252 Implemented by Ulrich Drepper.
4254 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4255 Implemented by Ulrich Drepper.
4257 * nscd now also caches the netgroup database.
4258 Implemented by Ulrich Drepper.
4260 * Integrate libm with gcc's -ffinite-math-only option.
4261 Implemented by Ulrich Drepper.
4263 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4264 to math functions. Implemented by Ulrich Drepper.
4266 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4267 Implemented by Ulrich Drepper.
4269 * New Linux interfaces: process_vm_readv, process_vm_writev
4271 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4272 Implemented by Ulrich Drepper.
4274 * Optimized nearbyint and strcasecmp for PPC.
4275 Implemented by Adhemerval Zanella.
4277 * New locales: bho_IN, unm_US, es_CU, ta_LK
4281 * The following bugs are resolved with this release:
4283 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4284 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4285 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4286 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4287 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4288 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4289 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4290 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4291 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4292 12795, 12811, 12813, 12814, 12841
4294 * The RPC implementation in libc is obsoleted. Old programs keep working
4295 but new programs cannot be linked with the routines in libc anymore.
4296 Programs in need of RPC functionality must be linked against TI-RPC.
4297 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4299 Visible changes of this change include (obviously) the inability to link
4300 programs using RPC functions without referencing the TI-RPC library and the
4301 removal of the RPC headers from the glibc headers.
4302 Implemented by Ulrich Drepper.
4304 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4305 syncfs, setns, sendmmsg
4307 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4308 yue_HK, lij_IT, mhr_RU
4310 * New encodings: CP770, CP771, CP772, CP773, CP774
4312 * New program sotruss to trace calls through PLTs
4313 Implemented by Ulrich Drepper.
4315 * The malloc hook implementation is marked deprecated and will be removed
4316 from the default implementation in the next version. The design never
4317 worked ever since the introduction of threads. Even programs which do
4318 not create threads themselves can use multiple threads created internally.
4322 * The following bugs are resolved with this release:
4324 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4325 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4326 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4327 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4330 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4332 * POWER7 optimizations: memset, memcmp, strncmp
4334 * New optimized string functions for x86-64: strnlen (SSE2),
4335 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4336 Implemented by Ulrich Drepper.
4340 * The following bugs are resolved with this release:
4342 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4343 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4344 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4345 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4346 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4347 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4348 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4349 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4351 * New interfaces: pthread_getname_np, pthread_setname_np
4353 * New Linux interface: recvmmsg
4355 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4357 * The dynamic linker now recognizes supported ABI versions from the
4358 EI_ABIVERSION field in the ELF header.
4359 Implemented by Ulrich Drepper.
4361 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4362 will not be used to fill in password fields in the passwd.byname replies.
4363 Instead it is used to synthesize the shadow.byname table, should it be
4364 missing. This is a useful mode in some installations involving Solaris.
4365 Implemented by Ulrich Drepper.
4367 * New locales: kok_IN, sq_MK, cv_RU
4371 * The following bugs are resolved with this release:
4373 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4374 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4375 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4376 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4377 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4378 10789, 10817, 10823, 10840, 10847
4380 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4382 Implemented by Ulrich Drepper.
4384 * Checking version of longjmp added that fails if an uninitialized stack
4385 frame would be created. Implemented by Ulrich Drepper.
4387 * STT_GNU_IFUNC is now supported in static executables.
4388 Implemented by H.J. Lu.
4390 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4392 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4393 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4394 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4395 Contributed by H.J. Lu.
4397 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4398 Implemented by Ulrich Drepper.
4400 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4402 Contributed by H.J. Lu.
4404 * Support for fma instruction in AVX on x86-64.
4405 Implemented by H.J. Lu and Ulrich Drepper.
4407 * AVX support in x86-64 auditing support in ld.so.
4408 Implemented by H.J. Lu.
4410 * STB_GNU_UNIQUE support added.
4411 Implemented by Ulrich Drepper.
4413 * Implement second fallback mode for optimized DNS lookup for even more
4414 broken environments. If two requests from the same port are not
4415 handled correctly close the socket and open a new one before sending
4416 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4417 can be used to select this mode right away, instead of rediscovering the
4418 necessity is every process again.
4419 Implemented by Ulrich Drepper.
4421 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4422 Implemented by Adam Tkac.
4424 * Optimized iconv conversions for S390x.
4425 Implemented by Andreas Krebbel.
4427 * Using condvars with PI mutexes is now more efficient due to kernel
4428 support for requeueing to PI futexes. NPTL support added for x86-64.
4429 Implemented by Ulrich Drepper.
4431 * New locales: ps_AF, my_MM
4435 * The following bugs are resolved with this release:
4437 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4438 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4439 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4440 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4441 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4443 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4444 Implemented by Ulrich Drepper.
4446 * New Linux interfaces: accept4, fallocate, fallocate64.
4447 Implemented by Ulrich Drepper.
4449 * Correct declarations of string function when used in C++ code. This
4450 could lead to compile errors for invalid C++ code.
4452 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4455 * New POSIX 2008 interface: psiginfo
4456 Implemented by Ulrich Drepper.
4458 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4459 Implemented by Ulrich Drepper.
4461 * Support for selecting between multiple function definitions at runtime
4462 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4464 * The libcrypt library can now use the hash function implementations in
4465 NSS. Implemented by Ulrich Drepper.
4467 * The malloc implementation can be compiled to be less memory efficient
4468 but higher performing in multi-threaded programs.
4469 Implemented by Ulrich Drepper.
4471 * New locales: nan_TW@latin, ks_IN
4473 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4474 Implemented by Ulrich Drepper.
4476 * Extended printf hook support. It is possible to use user-defined types
4477 and extend existing format specifiers.
4478 Implemented by Ulrich Drepper.
4480 * Handling for group shadow files has been added.
4481 Implemented by Ulrich Drepper.
4483 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4484 servers (the case, e.g., for some people using the built-in DNS
4485 server in ADSL modems/routers). There is a once-per-process timeout
4486 in case of a broken server. To avoid it, users can run nscd or put
4487 'options single-request' in /etc/resolv.conf.
4488 Implemented by Ulrich Drepper.
4492 * The following bugs are resolved with this release:
4494 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4495 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4496 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4497 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4498 6968, 6974, 6980, 6995, 7008, 7009, 7029
4500 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4501 up at the same time. Implemented by Ulrich Drepper.
4503 * TLS descriptors for LD and GD on x86 and x86-64.
4504 Implemented by Alexandre Oliva.
4506 * getaddrinfo now handles DCCP and UDPlite.
4507 Implemented by Ulrich Drepper.
4509 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4510 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4511 Implemented by Ulrich Drepper.
4513 * New implementation of memmem, strstr, and strcasestr which is O(n).
4514 Implemented by Eric Blake.
4516 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4518 * Implement "e" option for popen to open file descriptor with the
4519 close-on-exec flag set. Implemented by Ulrich Drepper.
4521 * Implement "b" mode for fmemopen. In this mode writes writes don't
4522 implicitly add a NUL byte and seeks from the end of the buffer really
4523 use the buffer end, not the string length as the basis.
4524 Implemented by Ulrich Drepper.
4526 * Many functions, exported and internal, now atomically set the close-on-exec
4527 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4529 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4531 Implemented by Pravin Satpute.
4533 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4537 * The following bugs are resolved with this release:
4539 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4540 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4541 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4542 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4543 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4544 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4545 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4547 * New locales: bo_CN, bo_IN, shs_CA.
4549 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4551 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4552 Implemented by Pravin Satpute.
4554 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4556 * nscd caches now all timeouts for DNS entries
4557 Implemented by Ulrich Drepper.
4559 * nscd is more efficient and wakes up less often.
4560 Implemented by Ulrich Drepper.
4562 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4563 vdprintf, and obstack_vprintf.
4564 Implemented by Jakub Jelinek.
4566 * Faster memset for x86-64.
4567 Implemented by Harsha Jagasia and H.J. Lu.
4569 * Faster memcpy on x86.
4570 Implemented by Ulrich Drepper.
4572 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4573 Implemented by Ulrich Drepper.
4575 * Faster sqrt and sqrtf implemention for some PPC variants.
4576 Implemented by Steven Munroe.
4580 * The following bugs are resolved with this release:
4582 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4583 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4584 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4585 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4586 5071, 5103, 5104, 5112, 5113, 5184, 5186
4588 * More checking functions: fread, fread_unlocked, open*, mq_open.
4589 Implemented by Jakub Jelinek and Ulrich Drepper.
4591 * Extend fortification to C++. Implemented by Jakub Jelinek.
4593 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4594 by not recognizing 'a' as a modifier when those specs are requested.
4595 Implemented by Jakub Jelinek.
4597 * PPC optimizations to math and string functions.
4598 Implemented by Steven Munroe.
4600 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4601 options to be passed. Implemented by Ulrich Drepper.
4603 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4605 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4606 Implemented by Ulrich Drepper.
4608 * Handle private futexes in the NPTL implementation.
4609 Implemented by Jakub Jelinek and Ulrich Drepper.
4611 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4612 Implemented by Roland McGrath and Ulrich Drepper.
4614 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4616 * SHA-256 and SHA-512 based password encryption.
4617 Implemented by Ulrich Drepper.
4619 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4620 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4623 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4624 Implemented by Ulrich Drepper.
4628 * The following bugs are resolved with this release:
4630 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4631 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4632 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4633 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4634 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4635 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4636 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4639 * New Linux interfaces: epoll_pwait, sched_getcpu.
4641 * New generic interfaces: strerror_l.
4643 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4647 * The following bugs are resolved with this release:
4649 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4650 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4651 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4652 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4653 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4654 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4655 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4656 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4657 3225, 3251, 3252, 3253, 3273
4659 * For Linux, the sorting of addresses returned by getaddrinfo now also
4660 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4661 Implemented by Ulrich Drepper.
4663 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4664 Implemented by Ulrich Drepper.
4666 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4668 * New iconv module for MIK. Contributed by Alexander Shopov.
4670 * For sites with broken group and/or passwd database, the auto-propagate
4671 option of nscd can prevent creating ID lookup entries from the results
4672 of a name lookup and vice versa. This usually is no problem but some
4673 site might have problems with the default behavior.
4674 Implemented by Ulrich Drepper.
4676 * Iterating over entire database in NIS can be slow. With the
4677 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4678 to trade time for memory. The entire database will be read at once.
4679 Implemented by Ulrich Drepper.
4681 * The interfaces introduced in RFC 3542 have been implemented by
4684 * Support for the new ELF hash table format was added by Ulrich Drepper.
4686 * Support for priority inheritance mutexes added by Jakub Jelinek and
4689 * Support for priority protected mutexes added by Jakub Jelinek.
4691 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4692 or_IN, csb_PL, fy_NL, sr_ME.
4696 * More overflow detection functions.
4698 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4699 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4701 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4702 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4703 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4704 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4705 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4706 by Masahide Washizawa.
4708 * It is now possible to install audit libraries for the dynamic linker using
4709 LD_AUDIT. Implemented by Ulrich Drepper.
4711 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4712 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4713 For a libc and libpthread that works well on Linux 2.4 kernels, we
4714 recommend using the stable 2.3 branch.
4716 * The new function open_wmemstream acts like open_memstream,
4717 but uses a wchar_t wide character buffer.
4719 * The new function ppoll is an improved version of poll, similar to pselect.
4721 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4722 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4723 renameat, unlinkat, linkat, symlinkat, readlinkat.
4725 * New Linux kernel system calls: unshare,
4726 inotify_init, inotify_add_watch, inotify_rm_watch.
4728 * The euidaccess function is now also known by the alias eaccess,
4729 for compatibility with some other systems.
4731 * Timezone data updated to 2006b version.
4735 * The following bugs are resolved with this release:
4737 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4738 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4739 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4740 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4741 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4742 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4744 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4746 * As of this release, GCC 4 can be used to compile the C Library.
4748 * Timezone data updated to 2005m version.
4752 * The following bugs are resolved with this release:
4754 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4755 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4756 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4757 777, 787, 821, 822, 823, 825
4759 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4763 * Support for RFC 3678. Real implementations exist only for Linux so far.
4764 Implemented by Ulrich Drepper.
4766 * nscd can now cache entries persistently. Expiring entries are reloaded.
4767 For speedups the cache can be shared in memory with client processes.
4768 Implemented by Ulrich Drepper.
4770 * nscd can now perform SELinux checks.
4771 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4773 * getaddrinfo queries are now cached. Canonical name lookup is performed
4775 Implemented by Ulrich Drepper.
4777 * The nothrow function attribute is used when headers are used by gcc when
4778 compiling C code. This can avoid significant amounts of exception
4781 * The malloc functions perform more error checking and are stricter when
4782 it comes to reacting on errors. The default action is to terminate
4783 the process after showing an error message. Implemented by Ulrich Drepper.
4785 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4786 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4788 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4789 namespaces using the new function dlmopen(). This feature is of course,
4790 like most other dynamic loading functionality, not available in statically
4791 linked applications. Implemented by Ulrich Drepper.
4793 * Low-overhead boundary checking variants of string and some stdio functions
4794 were added. These are to be used in conjunction with a gcc patch by
4795 Jakub Jelinek which adds calls to these functions if possible.
4796 Implemented by Jakub Jelinek and Ulrich Drepper.
4798 * Old code for several operating systems and machine architectures that
4799 have not been in working condition in a long time have been removed from
4800 the main source tree maintained by the GNU C Library's maintainers.
4801 These files are now reside in the separate `ports' source module
4802 that is usable as an add-on when building the library.
4806 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4807 interrogate the dynamic linker, compatible with the Solaris interface.
4809 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4810 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4812 * getifaddrs now uses the netlink interface on Linux to get its information.
4813 Implemented by Thorsten Kukuk.
4815 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4816 Implemented by Ulrich Drepper.
4818 * support for non-executable stacks on x86 has been added. Changes mostly
4821 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4824 * getaddrinfo now performs destination address selection according to
4829 * Thread-safe interfaces for many functions that access locale data
4830 were added in version 2.3, but these features were omitted from NEWS.
4831 Many functions have variants with an `_l' suffix that take a `locale_t'
4832 object as a parameter rather than consulting the current locale.
4833 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4834 create and maintain `locale_t' objects. Additionally, the new function
4835 `uselocale' sets "the current locale" (as used by functions not so
4836 parameterized) set for an individual thread. These features were added
4837 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4839 * The functions getresuid, getresgid, setresuid, and setresgid, which
4840 have long been available on Linux, are now declared in <unistd.h>
4841 and are now also available on the Hurd.
4843 * ELF thread-local storage support (TLS) now works on x86-64.
4845 * The new dynamic string token $LIB is expanded in shared library names.
4846 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4848 * Aldy Hernandez contributed complete software floating point support for
4849 PowerPC machines with no FPU.
4851 * fexecve is implemented on Linux.
4853 * The `btowc' function should work at least twice as fast due to
4854 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4856 * With approriate thread add-ons cancelable functions are now implemented
4857 in libc.so as well. No need to call the function in libpthread. This
4858 change allowed to finally disable the incorrect and expensive handling
4859 of weak definition in ld.so.
4861 * Yet more PLT entries in libc.so have been removed. We finally arrived
4862 at the bare minimum. Startup times improved appropriately.
4864 * Support for the new Linux/x86 system call interface was added. The
4865 AT_SYSINFO auxiliary vector entry is recognized and handled.
4869 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4872 * iconv (the program and the interface) now accepts empty names (excluding
4873 options like //TRANSLIT) to mean "use charset of current locale".
4875 * localedef can now transliterate characters in strings which are not in
4876 the provided charmap. The information from the input locale is used.
4878 * Prelinking support was added for ELF targets. This requires additional
4879 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4881 * Read-only stdio streams now use mmap to speed up operation by eliminating
4882 copying and buffer underflows. To use add 'm' to the mode string of
4883 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4885 * The malloc functions were completely rewritten by Wolfram Gloger based
4886 on Doug Lea's malloc-2.7.0.c.
4888 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4889 implementation of regex.
4891 * Bruno Haible upgraded the iconv and locale implementation to support
4894 * Contents of the LC_* and LANG environment variables in the CEN style are
4895 not recognized anymore. It never was used. Change by Ulrich Drepper.
4897 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4898 thread-local storage (TLS) ABI on some platforms.
4899 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4901 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4902 EUC-JISX0213, and TSCII.
4904 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4905 BSD-compatible interface for getting all network interface addresses.
4906 Implementation for IPv4 by Roland McGrath.
4908 * Loading of locale data is faster due to the introduction of a locale
4909 archive. Implemented by Roland McGrath and Ulrich Drepper.
4911 * Startup times are significantly reduced by not using exported functions
4912 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4915 * Steven Munroe contributed a port to PowerPC64/Linux.
4919 * The Hurd now uses the GNU libio implementation of stdio rather than the
4920 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4922 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4923 with the same behavior as the Linux system call of the same name.
4927 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4928 128-bit long double format.
4930 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4931 IBM1161, and IBM1162 charsets.
4933 * Andreas Jaeger contributed a port to x86-64/Linux.
4935 * Peter Bruin contributed a port to PowerPC/Hurd.
4937 * libc functions using I/O streams now can handle wide-oriented streams
4940 * optimizations in the dynamic linker. Binaries created by recent binutils
4941 versions start up quicker due to reduced time spent on relocations.
4943 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4947 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4948 asinh, atanh, j0 for the 128-bit long double format.
4950 * Bruno Haible updated all the code handling Unicode in some form to
4951 support Unicode 3.1.
4953 * Speed of regex for single-byte locales is back to previous levels.
4954 Patch by Isamu Hasegawa.
4956 * Alpha, SPARC, and IA-64 now also using floating stacks.
4958 * Startup time of internationalized applications greatly improved through
4959 iconv cache. Use iconvconfig to generate the cache file.
4960 Contributed by Ulrich Drepper.
4962 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4963 severe performance problems. Patch by David Mosberger.
4965 * The Hurd port got a lot more functionality like AIO, various stdio
4966 extensions, etc. Mainly done by Roland McGrath.
4968 * mtrace can now lookup symbols in shared libraries.
4972 * Intel's IA-64 math library is largely integrated. It provides fast and
4973 accurate implementatations for most basic and standard math functions
4974 in float, double, and long double format.
4976 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4977 and asin for the 96-bit long double format and asin, log, tan for the
4978 128-bit long double format.
4980 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4981 The basic double functions exist today. Contributed by Abraham Ziv
4982 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4983 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4985 * An asynchronous name lookup library was added. The interface is designed
4986 after POSIX AIO. The proposal was circulated beforehand to get comments.
4987 No negative ones came in. Implemented by Ulrich Drepper.
4989 * Port to S390/64bit contributed by Martin Schwidefsky
4990 <schwidefsky@de.ibm.com>.
4992 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4993 of functions for Linux/IA-64.
4995 * The RPC code is now thread safe. Threads can now use the same service
4996 of different services at the same time. Patch by Eric Norum
4997 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4999 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
5000 family of functions for Linux/S390.
5002 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
5003 of functions for Linux/x86.
5005 * Port to Linux/CRIS contributed by Axis Communications.
5009 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
5010 we can now check for namespace violations and missing declarations. The
5011 result is that almost all headers are now Unix-compliant (as defined in
5012 the upcoming XPG6). The negative side is that some programs might need
5013 corrections, too, if they depend on the incorrect form of the headers in
5014 previous versions which defined too many symbols and included too many
5017 * regex now handles multibyte character sets correctly.
5018 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
5020 * iconv (the program) does now conform to the upcoming XPG6 and handles
5021 charmaps. Instead of the charset names the path of charmaps can be
5022 provided and the conversion happens based on this data.
5023 Contributed by Ulrich Drepper.
5025 * The locale program now provides detailed information about the installed
5030 only lists the names of the supported locales
5034 provides details such as country, language, and codeset name.
5035 Contributed by Ulrich Drepper.
5039 * The gencat program now parses the input file according to the charset
5040 selected by the LC_CTYPE category. This is important for stateful
5041 character sets. To make generating catalogs easier there is a way
5042 to overwrite the charset selected by the locale: before the first
5043 message or $ quote line the catalog can contain a line like
5045 $ codeset=ISO-8859-2
5047 to select the charset (ISO-8859-2 in this case).
5049 Implemented by Shinya Hanataka and Ulrich Drepper.
5051 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
5052 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
5053 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
5055 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
5056 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
5058 * The LANGUAGE environment variable is now ignored unless the locale is
5059 changed from the default "C" locale.
5061 * The usual bug fixes.
5065 * Greg McGary added runtime support for bounds checking using gcc's
5066 new -fbounded-pointers option. ix86 target is complete. PowerPC
5069 * Thorsten Kukuk added secure mode support to nscd.
5071 * The Berkeley db libraries have been removed.
5073 Related, the nss_db module is now in a separate package since it
5074 obviously requires a database library being available.
5076 * Wide character I/O streams implemented by Ulrich Drepper.
5078 * Functions from the extended socket API added by Ulrich Drepper.
5080 * Functions feenableexcept and fedisableexcept to control the
5081 behaviour of individual exceptions have been added by Andreas Jaeger.
5083 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
5085 * The resolver code has been updated from bind 8.2.3-T5B which supports
5086 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
5089 This change could in some situations effect backward compatibility. Since
5090 now `_res' is a thread-local instead of a global variable, modifying it
5091 in one thread does not have any effect in other threads.
5093 The resolver library was also extended to allow IPv6 as the transport
5094 protocol for the requests. This work was done by Stig Venaas.
5096 * Compatibility code for K&R C compilers has been removed from the
5097 header files. A ISO C compiler is needed to use the library
5098 (conforming to either C89 or C99 standard).
5100 * Complete rewrite of the localedef program to support multibyte character
5101 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
5102 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
5103 Implemented by Ulrich Drepper.
5105 Bruno Haible significantly improved the generation and use of the data
5106 structures for the wide character tables.
5108 * Plural handling in gettext implemented by Ulrich Drepper.
5110 * The utmp daemon has been removed.
5112 * The port to MIPS-Linux has been finished by Andreas Jaeger.
5114 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
5117 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
5119 * POSIX barriers implemented by Kaz Kylheku.
5121 * POSIX spawn function family implemented by Ulrich Drepper.
5123 * POSIX spinlocks are now available.
5125 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
5127 * the configure option --enable-kernel=X.Y.Z allows to strip out
5128 compatibility for kernel versions before X.Y.Z. This is currently only
5129 implemented for Linux.
5131 * the sockaddr_in6 structure changed. The IPv6 working group added a new
5132 field sin6_scope_id. This means that all programs using IPv6 should be
5133 recompiled. Don't expect binary compatibility with previous glibc
5136 * various conversion modules for IBM character sets contributed by
5139 * IA-64 port by Jes Sorensen and HJ Lu.
5153 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
5155 * New xdr functions are added; some rpc functions are now 64bit clean.
5157 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
5159 * Fixed known incompatibilities with glibc 2.0.
5161 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
5163 * Optimized a number of functions (especially the ELF dynamic loader).
5165 * Update timezone data files.
5167 * lots of charmaps corrections
5169 * some new locale definitions and charmaps
5174 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
5175 conform to POSIX member type requirements. Symbol versions have been
5176 adjusted as needed within the library, and for direct use by applications,
5177 but there is potential for problems if third-party libraries use
5178 struct timeval as part of their interface. This does not present
5179 a problem for X and other "essential" system libraries.
5181 * An additional locale model to support C++ Standard Library locale
5182 model and probably more was implemented by Ulrich Drepper.
5184 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
5187 * Miles Bader provided the `argp' function family to support hierachical
5188 command line argument parsing, layered on top of getopt.
5190 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
5192 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
5195 * scanf recognizes the %a and %A format for scanning floating point numbers.
5197 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
5198 information and interfaces for the available integer types.
5200 * about 130 new math functions were added to implement the ISO C9x math
5203 * the new header <complex.h> contains definitions of the complex math
5204 functions from ISO C 9X.
5206 * the new header <tgmath.h> defines generic macros to use complex or
5207 real valued functions.
5209 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
5211 * Andreas Jaeger provided a test suite for the math library.
5213 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
5215 * Ulrich Drepper added character set conversion functions (iconv).
5217 * Optimized string functions have been added.
5219 * The localedata addon is now part of glibc.
5221 * An implementation of profiling shared libraries was added by Ulrich Drepper.
5223 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
5224 daemon for NSS (nscd).
5226 Missing a better place here are some numbers on improvements. Under
5227 Linux 2.1.125 un-tar-ing the kernel sources takes
5231 using local files 12.19s 6.88s 22.91s
5233 using NIS 13.92s 8.91s 26.34s
5235 using NIS & nscd 10.37s 7.34s 25.30s
5237 using NIS+ 27.57s 30.37s 640.46s
5239 using NIS+ & nscd 10.25s 7.83s 26.51s
5241 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5243 Keep in mind that non-namelookup related operations dominate above times.
5244 It was just a common complain that using NIS+ unpacking the kernel is
5247 [1] The old nscd implementation is not available anymore since it was
5248 distributed with glibc up to version 2.0.98 and thus is now replaced.
5250 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5252 * Mark Kettenis provided a Hesiod NSS module.
5254 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5255 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5257 * rcmd can now handle netgroups (Dick Streefland).
5259 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5262 * Support for the IPv6 protocol has been added to the socket API, as per the
5263 latest draft standards.
5265 * Support for Linux 2.2 has been added.
5267 * Interface changes relative to the latest 2.0.x release:
5268 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5269 addseverity NEW: Unix98
5270 alphasort64 NEW: LFS
5271 argp_err_exit_status NEW: argp, GNU ext
5272 argp_error NEW: argp, GNU ext
5273 argp_failure NEW: argp, GNU ext
5274 argp_help NEW: argp, GNU ext
5275 argp_parse NEW: argp, GNU ext
5276 argp_program_bug_address NEW: argp, GNU ext
5277 argp_program_version NEW: argp, GNU ext
5278 argp_program_version_hook NEW: argp, GNU ext
5279 argp_state_help NEW: argp, GNU ext
5280 argp_usage NEW: argp, GNU ext
5281 authdes_create NEW: Secure RPC
5282 authdes_getucred NEW: Secure RPC
5283 authdes_pk_create NEW: Secure RPC
5284 backtrace NEW: GNU ext.
5285 backtrace_symbols NEW: GNU ext.
5286 backtrace_symbols_fd NEW: GNU ext.
5288 cacosf NEW: ISO C 9x
5289 cacosh NEW: ISO C 9x
5290 cacoshf NEW: ISO C 9x
5291 cacoshl NEW: ISO C 9x
5292 cacosl NEW: ISO C 9x
5299 casinf NEW: ISO C 9x
5300 casinh NEW: ISO C 9x
5301 casinhf NEW: ISO C 9x
5302 casinhl NEW: ISO C 9x
5303 casinl NEW: ISO C 9x
5305 catanf NEW: ISO C 9x
5306 catanh NEW: ISO C 9x
5307 catanhf NEW: ISO C 9x
5308 catanhl NEW: ISO C 9x
5309 catanl NEW: ISO C 9x
5310 cbc_crypt NEW: Secure RPC
5314 ccoshf NEW: ISO C 9x
5315 ccoshl NEW: ISO C 9x
5321 cimagf NEW: ISO C 9x
5322 cimagl NEW: ISO C 9x
5323 clearerr_locked REMOVED
5324 clntunix_create NEW: sunrpc ext
5326 clog10 NEW: ISO C 9x
5327 clog10f NEW: ISO C 9x
5328 clog10l NEW: ISO C 9x
5338 cprojf NEW: ISO C 9x
5339 cprojl NEW: ISO C 9x
5341 crealf NEW: ISO C 9x
5342 creall NEW: ISO C 9x
5347 csinhf NEW: ISO C 9x
5348 csinhl NEW: ISO C 9x
5351 csqrtf NEW: ISO C 9x
5352 csqrtl NEW: ISO C 9x
5356 ctanhf NEW: ISO C 9x
5357 ctanhl NEW: ISO C 9x
5359 des_setparity NEW: Secure RPC
5360 ecb_crypt NEW: Secure RPC
5361 endutxent NEW: Unix98
5363 exp10f NEW: ISO C 9x
5364 exp10l NEW: ISO C 9x
5368 fattach NEW: STREAMS
5369 fdetach NEW: STREAMS
5373 feclearexcept NEW: ISO C 9x
5374 fegetenv NEW: ISO C 9x
5375 fegetexceptflag NEW: ISO C 9x
5376 fegetround NEW: ISO C 9x
5377 feholdexcept NEW: ISO C 9x
5379 feraiseexcept NEW: ISO C 9x
5380 ferror_locked REMOVED
5381 fesetenv NEW: ISO C 9x
5382 fesetexceptflag NEW: ISO C 9x
5383 fesetround NEW: ISO C 9x
5384 fetestexcept NEW: ISO C 9x
5385 feupdateenv NEW: ISO C 9x
5386 fflush_locked REMOVED
5390 fgets_unlocked NEW: GNU ext.
5391 fileno_locked REMOVED
5403 fputc_locked REMOVED
5404 fputs_unlocked NEW: GNU ext.
5405 fread_unlocked NEW: GNU ext.
5410 fstatvfs NEW: Unix98
5414 ftruncate64 NEW: LFS
5416 fwrite_unlocked NEW: GNU ext.
5417 gai_strerror NEW: IPv6
5421 getchar_locked REMOVED
5423 getdate_err NEW: Unix98
5424 getdate_r NEW: GNU ext.
5426 getnameinfo NEW: IPv6
5427 getnetname NEW: Secure RPC
5428 getpmsg NEW: STREAMS
5429 getpt NEW: Unix98 PTY
5430 getrlimit64 NEW: LFS
5431 getutxent NEW: Unix98
5432 getutxid NEW: Unix98
5433 getutxline NEW: Unix98
5434 glob64 NEW: GNU ext.
5435 globfree64 NEW: GNU ext.
5436 gnu_get_libc_release NEW: GNU ext.
5437 gnu_get_libc_version NEW: GNU ext.
5438 grantpt NEW: Unix98 PTY
5439 host2netname NEW: Secure RPC
5441 iconv_close NEW: iconv
5442 iconv_open NEW: iconv
5443 if_freenameindex NEW: IPv6
5444 if_indextoname NEW: IPv6
5445 if_nameindex NEW: IPv6
5446 if_nametoindex NEW: IPv6
5447 in6addr_any NEW: IPv6
5448 in6addr_loopback NEW: IPv6
5449 inet6_isipv4mapped NEW: IPv6
5450 isastream NEW: STREAMS
5451 iswblank NEW: GNU ext.
5452 key_decryptsession NEW: Secure RPC
5453 key_decryptsession_pk NEW: Secure RPC
5454 key_encryptsession NEW: Secure RPC
5455 key_encryptsession_pk NEW: Secure RPC
5456 key_gendes NEW: Secure RPC
5457 key_get_conv NEW: Secure RPC
5458 key_secretkey_is_set NEW: Secure RPC
5459 key_setnet NEW: Secure RPC
5460 key_setsecret NEW: Secure RPC
5461 llrint NEW: ISO C 9x
5462 llrintf NEW: ISO C 9x
5463 llrintl NEW: ISO C 9x
5464 llround NEW: ISO C 9x
5465 llroundf NEW: ISO C 9x
5466 llroundl NEW: ISO C 9x
5471 lrintf NEW: ISO C 9x
5472 lrintl NEW: ISO C 9x
5473 lround NEW: ISO C 9x
5474 lroundf NEW: ISO C 9x
5475 lroundl NEW: ISO C 9x
5477 makecontext NEW: Unix98
5478 mempcpy NEW: GNU ext.
5481 modify_ldt NEW: kernel
5485 nearbyint NEW: ISO C 9x
5486 nearbyintf NEW: ISO C 9x
5487 nearbyintl NEW: ISO C 9x
5488 netname2host NEW: Secure RPC
5489 netname2user NEW: Secure RPC
5490 nexttoward NEW: ISO C 9x
5491 nexttowardf NEW: ISO C 9x
5492 nexttowardl NEW: ISO C 9x
5496 passwd2des NEW: Secure RPC
5498 pow10f NEW: GNU ext.
5499 pow10l NEW: GNU ext.
5502 printf_size NEW: GNU ext.
5503 printf_size_info NEW: GNU ext.
5504 profil_counter REMOVED
5505 pthread_mutexattr_getkind_np REPLACED
5506 pthread_mutexattr_setkind_np REPLACED
5507 ptsname NEW: Unix98 PTY
5508 ptsname_r NEW: Unix98 PTY
5510 putchar_locked REMOVED
5511 putgrent NEW: GNU ext.
5513 putpmsg NEW: STREAMS
5514 pututxline NEW: Unix98
5518 readdir64_r NEW: LFS
5519 remquo NEW: ISO C 9x
5520 remquof NEW: ISO C 9x
5521 remquol NEW: ISO C 9x
5523 roundf NEW: ISO C 9x
5524 roundl NEW: ISO C 9x
5526 scalbln NEW: ISO C 9x
5527 scalblnf NEW: ISO C 9x
5528 scalblnl NEW: ISO C 9x
5530 sendfile NEW: kernel
5531 setcontext NEW: Unix98
5532 setrlimit64 NEW: LFS
5533 setutxent NEW: Unix98
5535 sigignore NEW: Unix98
5536 sigqueue NEW: POSIX.1b
5537 sigrelse NEW: Unix98
5538 sigset NEW: POSIX.1b
5539 sigtimedwait NEW: POSIX.1b
5540 sigwaitinfo NEW: POSIX.1b
5541 sincos NEW: GNU ext.
5542 sincosf NEW: GNU ext.
5543 sincosl NEW: GNU ext.
5547 strcasestr NEW: GNU ext.
5548 strtoimax NEW: ISO C 9x
5549 strtoumax NEW: ISO C 9x
5550 strverscmp NEW: GNU ext.
5551 svcauthdes_stats NEW: Secure RPC
5552 svcunix_create NEW: sunrpc etx
5553 svcunixfd_create NEW: sunrpc ext
5554 swapcontext NEW: Unix98
5555 tcgetsid NEW: Unix98 PTY
5556 tdestroy NEW: GNU ext.
5557 tgamma NEW: ISO C 9x
5558 tgammaf NEW: ISO C 9x
5559 tgammal NEW: ISO C 9x
5563 truncf NEW: ISO C 9x
5564 truncl NEW: ISO C 9x
5566 unlockpt NEW: Unix98 PTY
5567 updwtmpx NEW: Unix98
5568 user2netname NEW: Secure RPC
5569 utmpxname NEW: Unix98
5570 versionsort NEW: GNU ext.
5571 versionsort64 NEW: GNU ext.
5573 wcscasecmp NEW: GNU ext.
5574 wcsncasecmp NEW: GNU ext.
5575 wcsnlen NEW: GNU ext.
5576 wcstoimax NEW: ISO C 9x
5577 wcstoll NEW: ISO C 9x
5578 wcstoull NEW: ISO C 9x
5579 wcstoumax NEW: ISO C 9x
5581 wordexp NEW: POSIX.2
5582 wordfree NEW: POSIX.2
5583 write_profiling REMOVED
5584 xdecrypt NEW: Secure RPC
5585 xdr_authdes_cred NEW: Secure RPC
5586 xdr_authdes_verf NEW: Secure RPC
5587 xdr_cryptkeyarg NEW: Secure RPC
5588 xdr_cryptkeyarg2 NEW: Secure RPC
5589 xdr_cryptkeyres NEW: Secure RPC
5590 xdr_getcredres NEW: Secure RPC
5591 xdr_key_netstarg NEW: Secure RPC
5592 xdr_key_netstres NEW: Secure RPC
5593 xdr_keybuf NEW: Secure RPC
5594 xdr_keystatus NEW: Secure RPC
5595 xdr_netnamestr NEW: Secure RPC
5596 xdr_sizeof NEW: Secure RPC
5597 xdr_unixcred NEW: sunrpc ext
5598 xencrypt NEW: Secure RPC
5599 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5610 * inet_ntoa is thread-safe
5612 * updwtmp is moved from libutil to libc
5614 * rewrite of cbrt function
5616 * update of timezone data
5630 * add atoll function
5632 * fix complex problems in Berkeley DB code
5634 * fix math functions
5638 * fixed lots of header problems (especially Linux/GNU specific)
5640 * dynamic loader preserves all registers
5642 * Roland McGrath provided support for handling of auxiliary objects in
5643 the ELF dynamic loader.
5645 * support for parallel builds is improved
5649 * GNU extensions are no longer declared by default. To enable them you
5650 must define the macro `_GNU_SOURCE' in your program or compile with
5653 * The library has changed from using GNU ld symbol aliases to using weak
5654 symbols where available. The ELF object file format supports weak
5655 symbols; GNU ld also supports weak symbols in the a.out format. (There
5656 is also now support for other GNU ld extensions in ELF. Use the
5657 `--with-elf' option to configure to indicate you have ELF, and
5658 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5659 of many files which contained only symbol aliases, reducing the size of
5660 the source and the compiled library; many other files were renamed to
5661 less cryptic names previously occupied by the symbol alias files.
5662 There is a new header file <elf.h> for programs which operate on
5663 files in the ELF format.
5665 * Converted to Autoconf version 2, so `configure' has more options.
5666 Run `configure --help' to see the details.
5668 * The library can now be configured to build profiling, highly-optimized
5669 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5670 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5671 `configure' enable building these extra libraries. The shared library is
5672 built by default when using both ELF and GNU ld. When shared libraries
5673 are enabled, the new library `-ldl' is available for arbitrary run-time
5674 loading of shared objects; its interface is defined in <dlfcn.h>. The
5675 new header file <link.h> gives access to the internals of the run-time
5676 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5677 application of same name on other systems and it provides information
5678 about dynamically linked binaries.
5680 * The C library now provides the run-time support code for profiling
5681 executables compiled with `-pg'. Programs can control the profiling code
5682 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5683 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5684 the support for this file format was contributed by David Mosberger-Tang.
5686 * The math code has been replaced with a math library based on fdlibm from
5687 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5688 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5689 functions. The math functions now reside in a separate library, so
5690 programs using them will need to use `-lm' their linking commands.
5692 * John C. Bowman contributed optimized ix87 assembler inline functions.
5694 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5695 mechanism similar to that found in Solaris 2. This is now used for the
5696 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5697 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5698 file controls what services are used for each individual database. This
5699 works by loading shared libraries with names specified in `nsswitch.conf',
5700 so service modules can be changed or added at any time without even
5701 relinking any program. Currently there are the file, db, and NIS based
5702 NSS services available.
5704 * The new functions `strtoq' and `strtouq' parse integer values from
5705 strings, like `strtol' and `strtoul', but they return `long long int' and
5706 `unsigned long long int' values, respectively (64-bit quantities).
5708 * The new functions `strtof' and `strtold' parse floating-point values from
5709 strings, like `strtod', but they return `float' and `long double' values,
5710 respectively (on some machines `double' and `long double' are the same).
5712 * Ulrich Drepper has contributed new implementations of the floating-point
5713 printing and reading code used in the `printf' family of functions and
5714 `strtod', `strtof', and `strtold'. These new functions are perfectly
5715 accurate, and much faster than the old ones.
5717 * The implementation of the POSIX locale model was completely rewritten by
5718 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5719 to compile the POSIX locale definition.
5721 * The former dummy implementations of the strcoll and strxfrm function are
5722 now replaced by fully functional code contributed by Ulrich Drepper. The
5723 collation information comes from the POSIX locale definitions.
5725 * The new header <langinfo.h> defines an interface for accessing
5726 various locale-dependent data (using the locale chosen with `setlocale').
5728 * Ulrich Drepper has contributed a new suite of functions for operation on
5729 wide-character and multibyte-character strings, in <wchar.h>;
5730 and classification and case conversion of wide characters, in <wctype.h>.
5731 These new functions are conforming to the ISO C, Amendement 1 specification.
5733 * There is now a second implementation of the standard I/O library available.
5734 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5735 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5737 * You can now use positional parameter specifications in format strings
5738 for the `printf' and `scanf' families of functions. For example,
5739 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5740 ``Number 6, Mr Jones''. This is mainly useful when providing different
5741 format strings for different languages, whose grammars may dictate
5742 different orderings of the values being printed. To support this
5743 feature, the interface for `register_printf_handler' has changed; see
5744 the header file <printf.h> for details.
5746 * The `printf' and `scanf' families of functions now understand a new
5747 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5748 to group numbers as indicated by the locale; for `scanf' and friends, this
5749 says to accept as valid only a number with all the proper grouping
5750 separators in the right places. In the default "C" locale, numbers are
5751 not grouped; but locales for specific countries will define the usual
5752 conventions (i.e. separate thousands with `,' in the US locale).
5754 * The pgrp functions have been regularized, slightly incompatibly but much
5755 less confusingly. The core functions are now `getpgid' and `setpgid',
5756 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5757 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5758 provided for compatibility. There is no longer an incompatible `getpgrp'
5759 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5761 * The new header file <fts.h> and suite of functions simplify programs that
5762 operate on directory trees. This code comes from 4.4 BSD.
5764 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5765 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5766 NSS scheme used in glibc.
5768 * There is a new malloc debugging hook `__memalign_hook'.
5770 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5771 `unsigned int' in <sys/types.h>. These are for compatibility only and
5772 their use is discouraged.
5774 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5775 done differently, so that it works even without GNU ld.
5777 * New function `euidaccess' checks allowed access to a file like `access',
5778 but using the effective IDs instead of the real IDs.
5780 * The time zone data files have been updated for the latest and greatest
5781 local time conventions of the countries of the world.
5783 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5786 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5787 for formatting floating-point numbers. They are provided only for
5788 compatibility; new programs should use `sprintf' instead. There are
5789 also equivalent function for the `long double' floating-point type and
5790 all functions also exist in a reentrant form.
5792 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5793 functions for maintaining the login-record files (primarily of use to
5794 system programs such as `login'), and convenient functions for
5795 allocating and initializing a pseudo-terminal (pty) device.
5797 * Ulrich Drepper has contributed new support for System V style
5798 shared memory and IPC on systems that support it.
5800 * Ulrich Drepper has contributed several miscellaneous new functions found
5801 in System V: The `hsearch' family of functions provide an effective
5802 implementation of hash tables; `a64l' and `l64a' provide a very simple
5803 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5806 * Ulrich Drepper has contributed new reentrant counterparts for the
5807 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5809 * Ulrich Drepper has contributed new, highly-optimized versions of several
5810 string functions for the i486/Pentium family of processors.
5812 * Ulrich Drepper has updated the Linux-specific code, based largely
5813 on work done in Hongjiu Lu's version of GNU libc for Linux.
5814 The GNU library now supports Linux versions 2.0.10 and later,
5815 using the ELF object file format (i[3456]86-*-linux).
5817 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5819 * David Mosberger-Tang and Richard Henderson have ported the C library
5820 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5821 dynamic linking support for ELF/Alpha.
5823 * Richard Henderson contributed several Alpha optimized assembler function
5824 for arithmetic and string handling.
5826 * Ulrich Drepper has contributed a new set of message catalog functions to
5827 support multiple languages using the <libintl.h> interface, for use with
5828 his new package GNU gettext. Translation volunteers have contributed
5829 catalogs of the library's messages in Spanish, German, and Korean.
5831 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5832 program and the `catgets' function for reading the catalog files it
5833 creates. (The <libintl.h> interface is preferred; we include the
5834 <nl_types.h> interface using `catgets' only for source compatibility with
5835 programs already written to use it.)
5837 * New header file <values.h> gives SVID-compatible names for <limits.h>
5840 * Various new macros, declarations, and small header files for compatibility
5843 * New function `group_member' is a convenient way to check if a process has
5844 a given effective group ID.
5846 * When using GCC 2.7 and later, the socket functions are now declared in a
5847 special way so that passing an argument of type `struct sockaddr_in *',
5848 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5849 `struct sockaddr *' type, does not generate a type-clash warning.
5851 * New function `error' declared in header file <error.h> is a convenient
5852 function for printing error messages and optionally exiting; this is the
5853 canonical function used in GNU programs. The new functions `err', `warn',
5854 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5855 doing the same thing.
5857 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5858 POSIX.2 `glob' function to do ~ and {...} expansion.
5860 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5861 `clearenv' which is used in POSIX.9 is also available.
5863 * New function `getsid' returns session ID number on systems that support it.
5865 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5866 files <db.h> and <mpool.h> provide a rich set of functions for several
5867 types of simple databases stored in memory and in files, and <ndbm.h> is
5868 an old `ndbm'-compatible interface using the `db' functions. Link with
5869 `-ldb' to get these functions.
5871 * New macro `strdupa' copies a string like `strdup', but uses local stack
5872 space from `alloca' instead of dynamic heap space from `malloc'.
5874 * New function `strnlen' is like `strlen' but searches only a given maximum
5875 number of characters for the null terminator. `stpncpy', `strndup' and
5876 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5879 * New function `statfs' in header <sys/statfs.h>.
5881 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5882 provide convenient functions for operating on blocks of null-terminated
5885 * A new suite of functions in <utmp.h> handle all the details of reading
5886 and writing the utmp file.
5888 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5891 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5892 completely POSIX compliant and also implemented the extended functionality
5893 to handle alternate digit representation and alternate era date formats.
5895 * Ulrich Drepper provided an implementation of the `strptime' function
5896 defined in XPG4.2 which transforms a string into a `struct tm' value.
5898 * Paul Eggert provided the tzselect shell script as part of the timezone
5899 code. The shell script makes it easy to select the correct timezone
5902 * The implementation of the malloc family of functions is completely replaced
5903 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5904 The implementation uses the mmap function (if available) and it is
5905 optimized for the use in multi threaded programs.
5907 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5908 functions. This new functionality is usable by specifying a special
5909 salt string and it is compatible with implementation on *BSD systems.
5911 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5912 `getsubopt' to handle second level command line options, `bsd_signal'
5913 to access BSD style `signal' functionality, the obsolete `regexp' style
5916 * the `lchown' function is available on system which support this
5919 * The implementation of the shadow password handling function was contributed
5922 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5924 * POSIX.1g support was added. The <sys/select.h> header is available,
5925 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5926 implementation of `getaddrinfo'.
5930 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5932 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5933 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5935 * The new function `daemon' from 4.4 BSD is useful for server programs that
5936 want to put themselves in the background.
5938 * Joel Sherrill has contributed support for several standalone boards that
5939 run without an operating system.
5941 * `printf', `scanf' and friends now accept a `q' type modifier for long
5942 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5944 * All of the code taken from BSD (notably most of the math and networking
5945 routines) has been updated from the BSD 4.4-Lite release.
5947 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5949 * The new functions `getdomainname' and `setdomainname' fetch or change the
5950 YP/NIS domain name. These are system calls which exist on systems which
5953 * The time zone data files have been updated for the latest international
5956 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5957 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5961 * The C library now includes support for Sun RPC, from Sun's free
5962 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5963 are included. (There is still no support for YP.)
5965 * Tom Quinn has contributed a port of the C library to SGI machines running
5966 Irix 4 (mips-sgi-irix4).
5968 * The new `lockf' function is a simplified interface to the locking
5969 facilities of `fcntl', included for compatibility.
5971 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5973 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5975 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5978 * The error message printed by `assert' for a failed assertion now includes
5979 the name of the program (if using GNU ld) and the name of the calling
5980 function (with versions of GCC that support this).
5982 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5984 * The library now includes the <sys/mman.h> header file and memory
5985 management functions `mmap', `munmap', `mprotect', `msync', and
5986 `madvise', on systems that support those facilities.
5988 * The interface for `mcheck' has changed slightly: the function called to
5989 abort the program when an allocation inconsistency is detected now takes
5990 an argument that indicates the type of failure. The new function
5991 `mprobe' lets you request a consistency check for a particular block at
5992 any time (checks are normally done only when you call `free' or `realloc'
5995 * It is now possible to easily cross-compile the C library, building on one
5996 system a library to run on another machine and/or operating system. All
5997 you need to do is set the variable `HOST_CC' in `configparms' to the
5998 native compiler for programs to run on the machine you are building on (a
5999 few generator programs are used on Unix systems); set `CC' to the
6002 * The new function `fexecve' (only implemented on the GNU system) executes
6003 a program file given a file descriptor already open on the file.
6007 * Brendan Kehoe has contributed most of a port to the DEC Alpha
6008 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
6010 * You can set the variable `libprefix' in `configparms' to specify a prefix
6011 to be prepended to installed library files; this makes it easy to install
6012 the GNU C library to be linked as `-lgnuc' or whatever.
6014 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
6015 copies a limited number of characters from a string, and returns the
6016 address of the last character written.
6018 * You no longer need to check for whether the installed `stddef.h' is
6019 compatible with the GNU C library. configure now checks for you.
6021 * You can now define a per-stream `fileno' function to convert the
6022 stream's cookie into an integral file descriptor.
6024 * ``malloc (0)'' no longer returns a null pointer. Instead, it
6025 allocates zero bytes of storage, and returns a unique pointer which
6026 you can pass to `realloc' or `free'. The behavior is undefined if
6027 you dereference this pointer.
6029 * The C library now runs on Sony NEWS m68k machines running either
6030 NewsOS 3 or NewsOS 4.
6032 * The new `syscall' function is a system-dependent primitive function
6033 for invoking system calls. It has the canonical behavior on Unix
6034 systems, including unreliable return values for some calls (such as
6035 `pipe', `fork' and `getppid').
6037 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
6038 to `EAGAIN', which is the preferred name. On systems whose kernels
6039 use two distinct codes, the C library now translates EWOULDBLOCK to
6040 EAGAIN in every system call function.
6044 * The GNU C Library Reference Manual is now distributed with the library.
6045 `make dvi' will produce a DVI file of the printed manual.
6046 `make info' will produce Info files that you can read on line using C-h i
6047 in Emacs or the `info' program.
6048 Please send comments on the manual to bug-glibc-manual@gnu.org.
6050 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
6052 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
6054 * Jason Merrill has contributed a port to the Sequent Symmetry running
6055 Dynix version 3 (i386-sequent-dynix).
6057 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
6058 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
6060 * New function `memory_warnings' lets you arrange to get warnings when
6061 malloc is running out of memory to allocate, like Emacs gives you.
6063 * The C library now contains the relocating allocator used in Emacs 19 for
6064 its editing buffers. This allocator (ralloc) minimizes allocation
6065 overhead and fragmentation by moving allocated regions around whenever it
6066 needs to. You always refer to a ralloc'd region with a "handle" (a
6067 pointer to a pointer--an object of type `void **').
6069 * There is a new `printf' format: `%m' gives you the string corresponding
6070 to the error code in `errno'.
6072 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
6073 or `%[' conversion, but instead of filling in a fixed-sized buffer you
6074 pass, the `a' modifier says to fill in a `char **' you pass with a
6077 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
6078 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
6079 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
6081 * `mkstemp' is a traditional Unix function to atomically create and open a
6082 uniquely-named temporary file.
6086 * The standard location for the file that says what the local timezone is
6087 has changed again. It is now `/usr/local/etc/localtime' (or more
6088 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
6090 * The distribution no longer contains any files with names longer than 14
6093 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
6094 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
6096 * New functions `ttyslot' and `syslog' from 4.4 BSD.
6100 * The configuration process has changed quite a bit. The `configure'
6101 script is now used just like the configuration scripts for other GNU
6102 packages. The `sysdeps' directory hierarchy is much rearranged.
6103 The file `INSTALL' explains the new scheme in detail.
6105 * The header files no longer need to be processed into ANSI C and
6106 traditional C versions. There is just one set of files to install, and
6107 it will work with ANSI or old C compilers (including `gcc -traditional').
6109 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
6110 MIPS DECStation running Ultrix 4.
6112 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
6113 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
6114 made itself into a shared library.
6116 * Yet further improved support for the i386, running 4.3 BSD-like systems
6117 (such as Mach 3 with the Unix single-server), or System V.
6119 * New function `strncasecmp' to do case-insensitive string comparison
6120 with limited length.
6122 * New function `strsep' is a reentrant alternative to `strtok'.
6124 * New functions `scandir' and `alphasort' for searching directories.
6126 * New function `setenv' is a better interface to `putenv'.
6128 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
6129 function for traversing a directory tree.
6131 * The GNU obstack package is now also part of the C library.
6132 The new function `open_obstack_stream' creates a stdio stream that
6133 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
6134 formatted output directly to an obstack.
6136 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
6137 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
6139 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
6141 * The new functions `strfry' and `memfrob' do mysterious and wonderful
6142 things to your strings.
6144 * There are some new test programs: test-fseek, testmb, and testrand.
6146 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
6147 These ports are not finished, but are a good starting place for really
6148 supporting those systems.
6150 * `/etc/localtime' is now the standard location for the file that says what
6151 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
6152 This follows the general principle that `/etc' is the place for all local
6153 configuration files.
6155 * The C library header files now use `extern "C"' when used by the C++
6156 compiler, so the C library should now work with C++ code.
6158 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
6159 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
6162 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
6163 function which uses the `merge sort' algorithm, and is said to be
6164 significantly faster than the old GNU `qsort' function. Merge sort is
6165 now the standard `qsort' function. The new algorithm can require a lot
6166 of temporary storage; so, the old sorting function is called when the
6167 required storage is not available.
6169 * The C library now includes Michael Glad's Ultra Fast Crypt, which
6170 provides the Unix `crypt' function, plus some other entry points.
6172 * The code and header files taken from 4.4 BSD have been updated with the
6173 latest files released from Berkeley.
6175 ----------------------------------------------------------------------
6176 Copyright information:
6178 Copyright (C) 1992-2020 Free Software Foundation, Inc.
6180 Permission is granted to anyone to make or distribute verbatim copies
6181 of this document as received, in any medium, provided that the
6182 copyright notice and this permission notice are preserved,
6183 thus giving the recipient permission to redistribute in turn.
6185 Permission is granted to distribute modified versions
6186 of this document, or of portions of it,
6187 under the above conditions, provided also that they
6188 carry prominent notices stating who last changed them.
6191 version-control: never