1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2020 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * The mallinfo2 function is added to report statistics as per mallinfo,
13 but with larger field widths to accurately report values that are
14 larger than fit in an integer.
16 * Add <sys/platform/x86.h> to provide query macros for x86 CPU features.
18 * Support for the RISC-V ISA running on Linux has been expanded to run on
19 32-bit hardware. This is supported for the following ISA and ABI pairs:
25 The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils
28 Deprecated and removed features, and other changes affecting compatibility:
30 * The mallinfo function is marked deprecated. Callers should call
33 Changes to build and runtime requirements:
35 [Add changes to build and runtime requirements here]
37 Security related changes:
39 [Add security related changes here]
41 The following bugs are resolved with this release:
43 [The release manager will add the list generated by
44 scripts/list-fixed-bugs.py just before the release.]
51 * Unicode 13.0.0 Support: Character encoding, character type info, and
52 transliteration tables are all updated to Unicode 13.0.0, using
53 generator scripts contributed by Mike FABIAN (Red Hat).
55 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
57 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
58 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
59 Three ABIs are supported:
65 The arc* ABI is little-endian while arceb is big-endian. All ABIs use
66 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
68 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
69 DT_DEPAUDIT dynamic section entries of the main executable.
71 * powerpc64le supports IEEE128 long double libm/libc redirects when
72 using the -mabi=ieeelongdouble to compile C code on supported GCC
73 toolchains. It is recommended to use GCC 8 or newer when testing
76 * To help detect buffer overflows and other out-of-bounds accesses
77 several APIs have been annotated with GCC 'access' attribute. This
78 should help GCC 10 issue better warnings.
80 * On Linux, functions the pthread_attr_setsigmask_np and
81 pthread_attr_getsigmask_np have been added. They allow applications
82 to specify the signal mask of a thread created with pthread_create.
84 * The GNU C Library now provides the header file <sys/single_threaded.h>
85 which declares the variable __libc_single_threaded. Applications are
86 encouraged to use this variable for single-thread optimizations,
87 instead of weak references to symbols historically defined in
90 * The functions sigabbrev_np and sigdescr_np have been added. The
91 sigabbrev_np returns the abbreviated signal name (e.g. "HUP" for SIGHUP)
92 while sigdescr_np returns a string describing the signal number (e.g
93 "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
94 attempt to translate the return description, both functions return
95 NULL for an invalid signal number.
97 They should be used instead of sys_siglist or sys_sigabbrev and they
98 are both thread and async-signal safe. These functions are GNU extensions.
100 * The functions strerrorname_np and strerrordesc_np have been added. The
101 strerroname_np returns error number name (e.g. "EINVAL" for EINVAL) while
102 strerrordesc_np returns string describing error number
103 (e.g "Invalid argument" for EINVAL). Different than strerror,
104 strerrordesc_np does not attempt to translate the return description, both
105 functions return NULL for an invalid error number.
107 They should be used instead of sys_errlist and sys_nerr, both are
108 thread and async-signal safe. These functions are GNU extensions.
110 * AArch64 now supports standard branch protection security hardening
111 in glibc when it is built with a GCC that is configured with
112 --enable-standard-branch-protection (or if -mbranch-protection=standard
113 flag is passed when building both GCC target libraries and glibc,
114 in either case a custom GCC is needed). This includes branch target
115 identification (BTI) and pointer authentication for return addresses
116 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
117 extensions respectively for the protection to be effective,
118 otherwise the used instructions are nops. User code can use PAC-RET
119 without libc support, but BTI requires a libc that is built with BTI
120 support, otherwise runtime objects linked into user code will not be
123 Deprecated and removed features, and other changes affecting compatibility:
125 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
126 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
127 RPC header files. Backward compatibility for old programs is kept
128 only for architectures and ABIs that have been added in or before
129 glibc 2.31. New programs need to use TI-RPC
130 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
131 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
133 * Remove configure option --enable-obsolete-nsl. libnsl is only built
134 as shared library for backward compatibility and the NSS modules "nis"
135 and "nisplus" are not built at all and libnsl's headers aren't
136 installed. This compatibility is kept only for architectures and ABIs
137 that have been added in or before version 2.28. Replacement
138 implementations based on TI-RPC, which additionally support IPv6, are
139 available from <https://github.com/thkukuk/>. This change does not
140 affect the "compat" NSS module, which does not depended on libnsl
141 since 2.27 and thus can be used without NIS.
143 * The deprecated <sys/sysctl.h> header and the sysctl function have been
144 removed. To support old binaries, the sysctl function continues to
145 exist as a compatibility symbol (on those architectures which had it),
146 but always fails with ENOSYS. This reflects the removal of the system
147 call from all architectures, starting with Linux 5.5.
149 * The sstk function is no longer available to newly linked binaries.
150 Its implementation always returned with a failure, and the function
151 was not declared in any header file.
153 * The legacy signal handling functions siginterrupt, sigpause, sighold,
154 sigrelse, sigignore and sigset, and the sigmask macro have been
155 deprecated. Applications should use the sigsuspend, sigprocmask and
156 sigaction functions instead.
158 * ldconfig now defaults to the new format for ld.so.cache. glibc has
159 already supported this format for almost 20 years.
161 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
162 are no longer available to newly linked binaries, and their declarations
163 have been removed from <string.h>. They are exported solely as
164 compatibility symbols to support old binaries. All programs should use
167 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
168 are no longer available to newly linked binaries, and their declarations
169 have been removed from from <stdio.h>. They are exported solely as
170 compatibility symbols to support old binaries. All programs should use
171 strerror or strerror_r instead.
173 * Both strerror and strerror_l now share the same internal buffer in the
174 calling thread, meaning that the returned string pointer may be invalided
175 or contents might be overwritten on subsequent calls in the same thread or
176 if the thread is terminated. It makes strerror MT-safe.
178 * Using weak references to libpthread functions such as pthread_create
179 or pthread_key_create to detect the singled-threaded nature of a
180 program is an obsolescent feature. Future versions of glibc will
181 define pthread_create within libc.so.6 itself, so such checks will
182 always flag the program as multi-threaded. Applications should check
183 the __libc_single_threaded variable declared in
184 <sys/single_threaded.h> instead.
186 * The "files" NSS module no longer supports the "key" database (used for
187 secure RPC). The contents of the /etc/publickey file will be ignored,
188 regardless of the settings in /etc/nsswitch.conf. (This method of
189 storing RPC keys only supported the obsolete and insecure AUTH_DES
190 flavor of secure RPC.)
192 * The __morecore and __after_morecore_hook malloc hooks and the default
193 implementation __default_morecore have been deprecated. Applications
194 should use malloc interposition to change malloc behavior, and mmap to
195 allocate anonymous memory. A future version of glibc may require that
196 applications which use the malloc hooks must preload a special shared
197 object, to enable the hooks.
199 * The hesiod NSS module has been deprecated and will be removed in a
200 future version of glibc. System administrators are encouraged to
201 switch to other approaches for networked account databases, such as
204 Changes to build and runtime requirements:
206 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
207 long double redirects.
209 Security related changes:
211 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
212 invoked with the -c option and when processing invalid multi-byte input
213 sequences. Reported by Jan Engelhardt.
215 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
216 corruption when they were passed a pseudo-zero argument. Reported by Guido
217 Vranken / ForAllSecure Mayhem.
219 CVE-2020-1752: A use-after-free vulnerability in the glob function when
220 expanding ~user has been fixed.
222 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
223 memmove functions has been fixed. Discovered by Jason Royes and Samual
224 Dytrych of the Cisco Security Assessment and Penetration Team (See
227 The following bugs are resolved with this release:
229 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
230 [10441] manual: Backtraces code example lacks error checking
231 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
232 timer_sigev_thread dangerous
233 [14231] stdio: stdio-common tests memory requirements
234 [14578] libc: /proc-based emulation for lchmod, fchmodat
235 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
236 filtee has constructor
237 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
238 sequences (CVE-2016-10228)
239 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
240 character entities for infinity & pi
241 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
242 segfaults in applications
243 [20543] libc: Please move from .gnu.linkonce to comdat
244 [22489] network: gcc warns about implicit convertion in
245 ICMP6_FILTER_SETPASS with -Wsign-conversion
246 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
247 [23294] math: Complex _FloatN functions are redirected to the wrong
248 function with -mlong-double-64
249 [23296] libc: Data race in setting function descriptor during lazy
251 [23668] dynamic-link: ldconfig: Default to the new format for
253 [23819] hurd: hurd: Add C11 thread support
254 [23990] build: test-container error out on failure to exec child.
255 [23991] build: shell-container typo in run_command_array
256 [24638] manual: Error in example of parsing a template string
257 [24654] manual: Wrong declaration of wcschr in libc manual
258 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
260 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
261 dynamically loaded dsos
262 [25098] nptl: nptl: ctype classification functions are not AS-Safe
263 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
265 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
266 restore EAX, ECX and EDX
267 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
268 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
269 [25420] network: Race condition in resolv_conf.c can result in caching
270 stale configuration forever
271 [25487] math: sinl() stack corruption from crafted input
273 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
275 [25523] libc: MIPS/Linux inline syscall template is miscompiled
276 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
278 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
279 on 32 bit and old kernel
280 [25635] libc: arm: Wrong sysdep order selection for soft-fp
281 [25639] localedata: Some names of days and months wrongly spelt in
283 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
284 amount of sigset_t bytes
285 [25691] stdio: printf: memory leak when printing long multibyte
287 [25715] libc: system() returns wrong errors when posix_spawn fails
288 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
289 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
290 state for conversions that produce two Unicode code points
291 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
292 for linux x86_64 leads to livelock
293 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
294 test failures, invalid instruction in ld.so
295 [25790] glob: Typo in tst-fnmatch.input
296 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
298 [25819] localedata: Update locale data to Unicode 13.0.0
299 [25824] libc: Abnormal function of strnlen in aarch64
300 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
301 [25896] libc: Incorrect prctl
302 [25902] libc: Bad LOADARGS_N
303 [25905] dynamic-link: VSX registers are corrupted during PLT
304 resolution when glibc is built with --disable-multi-arch and --with-
306 [25933] string: Off by one error in __strncmp_avx2 when
307 length=VEC_SIZE*4 and strings are at page boundaries can cause a
309 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
310 exiting detached thread
311 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
313 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
315 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
316 [26073] math: getpayload() has wrong return value
317 [26076] dynamic-link: dlmopen crashes after failing to load
318 dependencies in audit mode
319 [26120] localedata: column width of of some Korean
320 JUNGSEONG/JONGSEONG characters wrong (should be 0)
321 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
322 [26133] libc: Incorrect need_arch_feature_F16C
323 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
325 [26149] libc: PKU is usable only if OSPKE is set
326 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
328 [26208] libc: Incorrect bit_cpu_CLFSH
329 [26210] network: Incorrect use of hidden symbols for global sunrpc
331 [26211] stdio: printf integer overflow calculating allocation size
332 [26214] stdio: printf_fp double free
333 [26215] stdio: printf_fp memory leak
334 [26232] time: FAIL: support/tst-timespec for 32-bit targets
335 [26258] nss: nss_compat should not read input files with mmap
336 [26332] string: Incorrect cache line size load causes memory
344 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
345 enable features from the draft ISO C2X standard. Only some features from
346 this draft standard are supported by the GNU C Library, and as the draft
347 is under active development, the set of features enabled by this macro is
348 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
349 by compiling with "gcc -std=gnu2x".
351 * The <math.h> functions that round their results to a narrower type now
352 have corresponding type-generic macros in <tgmath.h>, as defined in TS
353 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
354 Clarification Request 13 to TS 18661-3.
356 * The function pthread_clockjoin_np has been added, enabling join with a
357 terminated thread with a specific clock. It allows waiting against
358 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
360 * New locale added: mnw_MM (Mon language spoken in Myanmar).
362 * The DNS stub resolver will optionally send the AD (authenticated data) bit
363 in queries if the trust-ad option is set via the options directive in
364 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
365 mode, the AD bit, as provided by the name server, is available to
366 applications which call res_search and related functions. In the default
367 mode, the AD bit is not set in queries, and it is automatically cleared in
368 responses, indicating a lack of DNSSEC validation. (Therefore, the name
369 servers and the network path to them are treated as untrusted.)
371 Deprecated and removed features, and other changes affecting compatibility:
373 * The totalorder and totalordermag functions, and the corresponding
374 functions for other floating-point types, now take pointer arguments to
375 avoid signaling NaNs possibly being converted to quiet NaNs in argument
376 passing. This is in accordance with the resolution of Clarification
377 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
378 floating-point arguments directly will continue to work.
380 * The obsolete function stime is no longer available to newly linked
381 binaries, and its declaration has been removed from <time.h>.
382 Programs that set the system time should use clock_settime instead.
384 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
385 in a future version of glibc. In this release, the header still exists
386 but calling ftime will cause a compiler warning. All programs should use
387 gettimeofday or clock_gettime instead.
389 * The gettimeofday function no longer reports information about a
390 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
391 many years, as it cannot handle the full complexity of the world's
392 timezones, but hitherto we have supported it on a best-effort basis.
393 Changes required to support 64-bit time_t on 32-bit architectures have
394 made this no longer practical.
396 As of this release, callers of gettimeofday with a non-null 'tzp' argument
397 should expect to receive a 'struct timezone' whose tz_minuteswest and
398 tz_dsttime fields are zero. (For efficiency reasons, this does not always
399 happen on a few Linux-based ports. This will be corrected in a future
402 All callers should supply a null pointer for the 'tzp' argument to
403 gettimeofday. For accurate information about the time zone associated
404 with the current time, use the localtime function.
406 gettimeofday itself is obsolescent according to POSIX. We have no plans
407 to remove access to this function, but portable programs should consider
408 using clock_gettime instead.
410 * The settimeofday function can still be used to set a system-wide time
411 zone when the operating system supports it. This is because the Linux
412 kernel reused the API, on some architectures, to describe a system-wide
413 time-zone-like offset between the software clock maintained by the kernel,
414 and the "RTC" clock that keeps time when the system is shut down.
416 However, to reduce the odds of this offset being set by accident,
417 settimeofday can no longer be used to set the time and the offset
418 simultaneously. If both of its two arguments are non-null, the call
419 will fail (setting errno to EINVAL).
421 Callers attempting to set this offset should also be prepared for the call
422 to fail and set errno to ENOSYS; this already happens on the Hurd and on
423 some Linux architectures. The Linux kernel maintainers are discussing a
424 more principled replacement for the reused API. After a replacement
425 becomes available, we will change settimeofday to fail with ENOSYS on all
426 platforms when its 'tzp' argument is not a null pointer.
428 settimeofday itself is obsolescent according to POSIX. Programs that set
429 the system time should use clock_settime and/or the adjtime family of
430 functions instead. We may cease to make settimeofday available to newly
431 linked binaries after there is a replacement for Linux's time-zone-like
434 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
435 the optional CAS instruction is implemented (for instance, LEON processors
436 are still supported, but SuperSPARC processors are not).
438 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
441 * If a lazy binding failure happens during dlopen, during the execution of
442 an ELF constructor, the process is now terminated. Previously, the
443 dynamic loader would return NULL from dlopen, with the lazy binding error
444 captured in a dlerror message. In general, this is unsafe because
445 resetting the stack in an arbitrary function call is not possible.
447 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
448 executable stack unless explicitly configured at build time to require
449 minimum kernel version 4.8 or newer. This is because executing
450 floating-point branches on a non-executable stack on Linux kernels prior to
451 4.8 can lead to application crashes for some MIPS configurations. While
452 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
453 expected to enable non-executable stack by default with PT_GNU_STACK by
454 default and is thus likely to trigger a crash on older kernels.
456 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
457 non-executable stack while dropping support for older kernels.
459 * System call wrappers for time system calls now use the new time64 system
460 calls when available. On 32-bit targets, these wrappers attempt to call
461 the new system calls first and fall back to the older 32-bit time system
462 calls if they are not present. This may cause issues in environments
463 that cannot handle unsupported system calls gracefully by returning
464 -ENOSYS. Seccomp sandboxes are affected by this issue.
466 Changes to build and runtime requirements:
468 * It is no longer necessary to have recent Linux kernel headers to build
469 working (non-stub) system call wrappers on all architectures except 64-bit
470 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
472 * The ChangeLog file is no longer present in the toplevel directory of the
473 source tree. ChangeLog files are located in the ChangeLog.old directory as
474 ChangeLog.N where the highest N has the latest entries.
476 Security related changes:
478 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
479 out-of-bounds write when executed in a signal frame context.
481 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
482 environment variable during program execution after a security
483 transition, allowing local attackers to restrict the possible mapping
484 addresses for loaded libraries and thus bypass ASLR for a setuid
485 program. Reported by Marcin Kościelnicki.
487 The following bugs are resolved with this release:
489 [12031] localedata: iconv -t ascii//translit with Greek characters
490 [15813] libc: Multiple issues in __gen_tempname
491 [17726] libc: [arm, sparc] profil_counter should be compat symbol
492 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
493 [19767] libc: vdso is not used with static linking
494 [19903] hurd: Shared mappings not being inherited by children processes
495 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
496 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
498 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
499 Symbols-A/B Unicode blocks
500 [23518] libc: Eliminate __libc_utmp_jump_table
501 [24026] malloc: malloc_info() returns wrong numbers
502 [24054] localedata: Many locales are missing date_fmt
503 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
504 [24304] dynamic-link: Lazy binding failure during ELF
505 constructors/destructors is not fatal
506 [24376] libc: RISC-V symbol size confusion with _start
507 [24682] localedata: zh_CN first weekday should be Monday per GB/T
509 [24824] libc: test-in-container does not install charmap files compatible
511 [24844] regex: regex bad pointer / leakage if malloc fails
512 [24867] malloc: Unintended malloc_info formatting changes
513 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
514 [24880] libc: login: utmp implementation uses struct flock with fcntl64
515 [24882] libc: login: pututline uses potentially outdated cache
516 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
517 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
519 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
521 [24930] dynamic-link: dlopen of PIE executable can result in
522 _dl_allocate_tls_init assertion failure
523 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
524 (stringop-overflow error)
525 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
526 functions other can lead to crashes
527 [24967] libc: jemalloc static linking causes runtime failure
528 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
530 [25035] libc: sbrk() failure handled poorly in tunables_strdup
531 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
532 [25097] libc: new -Warray-bounds with GCC 10
533 [25112] dynamic-link: dlopen must not make new objects accessible when it
534 still can fail with an error
535 [25139] localedata: Please add the new mnw_MM locale
536 [25149] regex: Array bounds violation in proceed_next_node
537 [25157] dynamic-link: Audit cookie for the dynamic loader is not
538 initialized correctly
539 [25189] libc: glibc's __glibc_has_include causes issues with clang
541 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
543 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
544 binaries (CVE-2019-19126)
545 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
547 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
549 [25232] string: <string.h> does not enable const correctness for strchr et
551 [25233] localedata: Consider "." as the thousands separator for sl_SI
553 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
554 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
555 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
557 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
558 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
560 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
561 (dl_initfirst) link map pointer
562 [25401] malloc: pvalloc must not have __attribute_alloc_size__
563 [25423] libc: Array overflow in backtrace on powerpc
564 [25425] network: Missing call to __resolv_context_put in
565 getaddrinfo.c:gethosts
572 * Unicode 12.1.0 Support: Character encoding, character type info, and
573 transliteration tables are all updated to Unicode 12.1.0, using
574 generator scripts contributed by Mike FABIAN (Red Hat).
576 * The dynamic linker accepts the --preload argument to preload shared
577 objects, in addition to the LD_PRELOAD environment variable.
579 * The twalk_r function has been added. It is similar to the existing
580 twalk function, but it passes an additional caller-supplied argument
581 to the callback function.
583 * On Linux, the getdents64, gettid, and tgkill functions have been added.
585 * Minguo (Republic of China) calendar support has been added as an
586 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
589 * The entry for the new Japanese era has been added for ja_JP locale.
591 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
592 pvalloc, memalign, and posix_memalign fail now with total object size
593 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
594 pointer subtraction within the allocated object, where results might
595 overflow the ptrdiff_t type.
597 * The dynamic linker no longer refuses to load objects which reference
598 versioned symbols whose implementation has moved to a different soname
599 since the object has been linked. The old error message, symbol
600 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
601 link time reference, is gone.
603 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
604 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
605 functions. These behave similarly to their "timed" equivalents, but also
606 accept a clockid_t parameter to determine which clock their timeout should
607 be measured against. All functions allow waiting against CLOCK_MONOTONIC
608 and CLOCK_REALTIME. The decision of which clock to be used is made at the
609 time of the wait (unlike with pthread_condattr_setclock, which requires
610 the clock choice at initialization time).
612 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
613 work, new resolvers can use a second argument which can be extended in
614 the future, currently it contains the AT_HWCAP2 value.
616 Deprecated and removed features, and other changes affecting compatibility:
618 * The copy_file_range function fails with ENOSYS if the kernel does not
619 support the system call of the same name. Previously, user space
620 emulation was performed, but its behavior did not match the kernel
621 behavior, which was deemed too confusing. Applications which use the
622 copy_file_range function can no longer rely on glibc to provide a fallback
623 on kernels that do not support the copy_file_range system call, and if
624 this function returns ENOSYS, they will need to use their own fallback.
625 Support for copy_file_range for most architectures was added in version
626 4.5 of the mainline Linux kernel.
628 * The functions clock_gettime, clock_getres, clock_settime,
629 clock_getcpuclockid, clock_nanosleep were removed from the librt library
630 for new applications (on architectures which had them). Instead, the
631 definitions in libc will be used automatically, which have been available
634 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
635 and <sys/stropts.h> have been removed.
637 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
638 resolver flag (deprecated in glibc 2.25) have been removed.
640 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
641 resolver have been removed from <resolv.h>.
643 * With --enable-bind-now, installed programs are now linked with the
646 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
647 configurations) has been removed, following the deprecation of this
648 subarchitecture in version 8 of GCC, and its removal in version 9.
650 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
651 header have been removed.
653 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
654 deprecated and will be removed from a future version of glibc.
655 Application should directly access /proc instead. For obtaining random
656 bits, the getentropy function can be used.
658 Changes to build and runtime requirements:
660 * GCC 6.2 or later is required to build the GNU C Library.
662 Older GCC versions and non-GNU compilers are still supported when
663 compiling programs that use the GNU C Library.
665 Security related changes:
667 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
668 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
669 has undefined behavior. On x32, the size_t argument may be passed
670 in the lower 32 bits of the 64-bit RDX register with non-zero upper
671 32 bits. When it happened with the sign bit of RDX register set,
672 memcmp gave the wrong result since it treated the size argument as
673 zero. Reported by H.J. Lu.
675 CVE-2019-9169: Attempted case-insensitive regular-expression match
676 via proceed_next_node in posix/regexec.c leads to heap-based buffer
677 over-read. Reported by Hongxu Chen.
679 The following bugs are resolved with this release:
681 [2872] locale: Transliteration Cyrillic -> ASCII fails
682 [6399] libc: gettid() should have a wrapper
683 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
684 [16976] glob: fnmatch unbounded stack VLA for collating symbols
685 [17396] localedata: globbing for locale by [[.collating-element.]]
686 [18035] dynamic-link: pldd does no longer work, enters infinite loop
687 [18465] malloc: memusagestat is built using system C library
688 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
689 invalid input drops valid char
690 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
691 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
692 [21897] localedata: Afar locales: Fix mon, abmon, and abday
693 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
694 [23352] malloc: __malloc_check_init still defined in public header
696 [23403] nptl: Wrong alignment of TLS variables
697 [23501] libc: nftw() doesn't return dangling symlink's inode
698 [23733] malloc: Check the count before calling tcache_get()
699 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
701 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
702 [23844] nptl: pthread_rwlock_trywrlock results in hang
703 [23983] argparse: Missing compat versions of argp_failure and argp_error
704 for long double = double
705 [23984] libc: Missing compat versions of err.h and error.h functions for
707 [23996] localedata: Dutch salutations
708 [24040] libc: riscv64: unterminated call chain in __thread_start
709 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
711 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
712 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
714 [24114] regex: regexec buffer read overrun in "grep -i
715 '\(\(\)*.\)*\(\)\(\)\1'"
716 [24122] libc: Segfaults if 0 returned from la_version
717 [24153] stdio: Some input functions do not react to stdin assignment
718 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
719 RDX is set) (CVE-2019-7309)
720 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
721 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
722 not the default "nor"
723 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
724 false positives, change to modern flexible array
725 [24180] nptl: pthread_mutex_trylock does not use the correct order of
726 instructions while maintaining the robust mutex list due to missing
728 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
729 unnecessary librt dependencies
730 [24200] localedata: Revert first_weekday removal in en_IE locale
731 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
732 [24215] nptl: pthread_timedjoin_np should be a cancellation point
733 [24216] malloc: Check for large bin list corruption when inserting
735 [24228] stdio: old x86 applications that use legacy libio crash on exit
736 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
738 [24293] localedata: Missing Minguo calendar support for TW locales
739 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
741 [24307] localedata: Update locale data to Unicode 12.0.0
742 [24323] dynamic-link: dlopen should not be able open PIE objects
743 [24335] build: "Obsolete types detected" with Linux 5.0 headers
744 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
746 [24370] localedata: Add lang_name for tt_RU locale
747 [24372] locale: Binary locale files are not architecture independent
748 [24394] time: strptime %Ey mis-parses final year of era
749 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
751 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
753 [24531] malloc: Malloc tunables give tcache assertion failures
754 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
756 [24535] localedata: Update locale data to Unicode 12.1.0
757 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
758 kernels and break testing
759 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
760 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
761 [-Werror=format-overflow=]
762 [24570] libc: alpha: compat msgctl uses __IPC_64
763 [24584] locale: Data race in __wcsmbs_clone_conv
764 [24588] stdio: Remove codecvt vtables from libio
765 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
767 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
768 [24632] stdio: Old binaries which use freopen with default stdio handles
770 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
772 [24652] localedata: szl_PL spelling correction
773 [24695] nss: nss_db: calling getpwent after endpwent crashes
774 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
775 in /etc/nsswitch.conf
776 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
777 [24740] libc: getdents64 type confusion
778 [24741] dynamic-link: ld.so should not require that a versioned symbol is
779 always implemented in the same library
780 [24744] libc: Remove copy_file_range emulation
781 [24757] malloc: memusagestat is linked against system libpthread
782 [24794] libc: Partial test suite run builds corrupt test-in-container
790 * The getcpu wrapper function has been added, which returns the currently
791 used CPU and NUMA node. This function is Linux-specific.
793 * A new convenience target has been added for distribution maintainers
794 to build and install all locales as directories with files. The new
795 target is run by issuing the following command in your build tree:
796 'make localedata/install-locale-files', with an optional DESTDIR
797 to set the install root if you wish to install into a non-default
800 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
802 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
803 for _GNU_SOURCE, to match BSD environments.
805 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
806 indicates that it will abort the transaction prior to entering the kernel
807 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
808 suspended, and this caused some undefined side-effects issues by aborting
809 transactions manually. Glibc avoided it by abort transactions manually on
810 each syscall, but it lead to performance issues on newer kernels where the
811 HTM state is saved and restore lazily (the state being saved even when the
812 process actually does not use HTM).
814 * The functions posix_spawn_file_actions_addchdir_np and
815 posix_spawn_file_actions_addfchdir_np have been added, enabling
816 posix_spawn and posix_spawnp to run the new process in a different
817 directory. These functions are GNU extensions. The function
818 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
821 * The popen and system do not run atfork handlers anymore (BZ#17490).
822 Although it is a possible POSIX violation, the POSIX rationale in
823 pthread_atfork documentation regarding atfork handlers is to handle
824 inconsistent mutex state after a fork call in a multi-threaded process.
825 In both popen and system there is no direct access to user-defined mutexes.
827 * Support for the C-SKY ABIV2 running on Linux has been added. This port
828 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
830 - C-SKY ABIV2 soft-float little-endian
831 - C-SKY ABIV2 hard-float little-endian
833 * strftime's default formatting of a locale's alternative year (%Ey)
834 has been changed to zero-pad the year to a minimum of two digits,
835 like "%y". This improves the display of Japanese era years during
836 the first nine years of a new era, and is expected to be harmless
837 for all other locales (only Japanese locales regularly have
838 alternative year numbers less than 10). Zero-padding can be
839 overridden with the '_' or '-' flags (which are GNU extensions).
841 * As a GNU extension, the '_' and '-' flags can now be applied to
842 "%EY" to control how the year number is formatted; they have the
843 same effect that they would on "%Ey".
845 Deprecated and removed features, and other changes affecting compatibility:
847 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
848 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
850 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
851 in <sys/procfs.h>, has been corrected to match the type actually used by
852 the Linux kernel. This affects the size and layout of that structure on
853 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
855 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
856 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
857 defined in <sys/procfs.h>, has been corrected to match the type actually
858 used by the Linux kernel. This affects the size and layout of those
861 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
862 meant to scan a string and allocate space for it with malloc, is now
863 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
864 defined. This extension conflicts with C99's use of '%a' to scan a
865 hexadecimal floating-point number, which is now available to programs
866 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
868 POSIX.1-2008 includes the feature of allocating a buffer for string input
869 with malloc, using the modifier letter 'm' instead. Programs using
870 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
871 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
872 C99 '%a' no longer need to avoid _GNU_SOURCE.
874 GCC's -Wformat warnings can detect most uses of this extension, as long
875 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
876 __attribute__ ((format (scanf, ...))).
878 Changes to build and runtime requirements:
880 * Python 3.4 or later is required to build the GNU C Library.
882 * On most architectures, GCC 5 or later is required to build the GNU C
883 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
885 Older GCC versions and non-GNU compilers are still supported when
886 compiling programs that use the GNU C Library.
888 Security related changes:
890 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
891 denial of service due to resource exhaustion when processing getaddrinfo
892 calls with crafted host names. Reported by Guido Vranken.
894 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
895 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
896 happened, accessing the 32-bit size_t value as the full 64-bit register
897 in the assembly string/memory functions would cause a buffer overflow.
900 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
901 addresses with arbitrary trailing characters, potentially leading to data
902 or command injection issues in applications.
904 The following bugs are resolved with this release:
906 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
907 [10496] localedata: 12h time representation in multiple locales faulty
908 [10797] localedata: it_IT locale numeric does not have a separator for
910 [11319] libc: dprintf doesn't handle errors properly
911 [16346] time: mktime: potentially unsafe use of localtime_offset
912 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
914 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
915 posix_spawn_file_actions_addfchdir_np
916 [17426] localedata: Indian locales: set the correct date format
917 [17490] stdio: popen should not invoke atfork handlers
918 [17783] libc: TIOCSER_TEMT conditions inconsistent
919 [18040] regex: use-after-free in regexec/get_subexp
920 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
921 [20018] network: getaddrinfo should reject IP addresses with trailing
922 characters (CVE-2016-10739)
923 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
924 [20271] libc: Missing "\n" in __libc_fatal calls
925 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
926 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
927 pointer argument is non-NULL
928 [21037] stdio: open_memstream and freopen
929 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
930 [21716] time: Crash in glibc's mktime in low-memory situations
931 [22834] stdio: Subprocess forked by popen may crash in Linux when
932 multithreads call popen
933 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
934 and pthread_create fails.
935 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
936 [23125] libc: riscv64: endless loop when throwing an exception from a
938 [23275] nptl: Race in pthread_mutex_lock while promoting to
939 PTHREAD_MUTEX_ELISION_NP.
940 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
942 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
944 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
946 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
947 [23509] dynamic-link: CET enabled glibc is incompatible with the older
949 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
950 [23521] nss: get_next_alias nss_files file stream leak
951 [23538] nptl: Hang in pthread_cond_broadcast
952 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
953 [23578] regex: Invalid memory access if regex pattern contains NUL byte
954 [23579] libc: Errors misreported in preadv2
955 [23597] build: support/test-container.c doesn't work with different
957 [23603] time: mktime signed integer overflow on large timestamps
958 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
959 [23614] libc: powerpc: missing CFI register information in __mpn_*
961 [23637] string: Generic strstr/strcasestr fails with huge needles
962 [23640] libc: no way to easily clear FD_CLOEXEC in
963 posix_spawn_file_actions_adddup2()
964 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
966 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
968 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
969 [23689] libc: Bug in documentation for rusage.ru_ixrss in
970 bits/types/struct_rusage.h
971 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
973 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
975 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
976 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
977 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
979 [23724] localedata: Albanian date formats are incorrect
980 [23735] math: libnldbl_nonshared.a references internal libm symbols
981 [23740] localedata: kl_GL: Month names and date formats need update
982 [23744] regex: regex refactorings to remove BE, avoid duplication
983 [23745] time: mktime fix for Gnulib + coreutils
984 [23758] time: Improve the width of alternate representation for year in
986 [23783] libc: [mips] Missing CMSPAR bits/termios.h
987 [23789] time: mktime does not set errno on failure
988 [23791] localedata: Wrong monetary format for ca_ES locale
989 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
990 [23794] locale: c16rtomb does not handle surrogate pairs
991 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
992 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
993 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
994 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
995 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
996 [23862] libc: [sh] missing kernel-features.h undefines
997 [23864] libc: [riscv] missing kernel-features.h undefines
998 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
999 [23907] malloc: Incorrect double-free malloc tcache check disregards
1001 [23913] libc: off-by-one in function maybe_script_execute in
1002 sysdeps/posix/spawni.c
1003 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
1004 [23923] locale: Add --no-hard-links option to localedef
1005 [23927] network: Linux if_nametoindex() does not close descriptor
1007 [23961] math: powf can overflow to inf without setting errno in non-
1008 nearest rounding mode
1009 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
1010 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
1011 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
1012 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
1013 [24011] localedata: Fixed small type in comment for locale bs_BA
1014 [24018] libc: gettext() may return NULL
1015 [24022] build: riscv build failure with Linux kernel 4.20-rc7
1016 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
1017 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
1019 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
1020 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
1022 [24046] localedata: en_US locale doesn't define date_fmt
1023 [24063] manual: @var{errno} should be @code{errno}
1024 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
1025 [24088] libc: VSCR field is not being correctly read in ucontext_t on
1027 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
1029 [24097] string: Can't use 64-bit register for size_t in assembly codes for
1031 [24110] hurd: SS_DISABLE never set in stack_t value returned by
1033 [24112] network: Do not send DNS queries for non-host names (where all
1034 answers will be rejected)
1035 [24130] libc: alpha __remqu corrupts $f3 register
1042 * The localization data for ISO 14651 is updated to match the 2016
1043 Edition 4 release of the standard, this matches data provided by
1044 Unicode 9.0.0. This update introduces significant improvements to the
1045 collation of Unicode characters. This release deviates slightly from
1046 the standard in that the collation element ordering for lowercase and
1047 uppercase LATIN script characters is adjusted to ensure that regular
1048 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
1049 is not matched by [a-z]. With the update many locales have been
1050 updated to take advantage of the new collation information. The new
1051 collation information has increased the size of the compiled locale
1052 archive or binary locales.
1054 * The GNU C Library can now be compiled with support for Intel CET, AKA
1055 Intel Control-flow Enforcement Technology. When the library is built
1056 with --enable-cet, the resulting glibc is protected with indirect
1057 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
1058 compatible with all existing executables and shared libraries. This
1059 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
1060 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
1061 capable of multi-byte NOPs, like x86-64 processors as well as Intel
1062 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
1063 x86_64 and x32 on non-CET processors. --enable-cet has been tested
1064 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
1067 * The GNU C Library now has correct support for ABSOLUTE symbols
1068 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
1069 relocated incorrectly or in some cases discarded. The GNU linker can
1070 make use of the newer semantics, but it must communicate it to the
1071 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
1072 field) to indicate such support is required.
1074 * Unicode 11.0.0 Support: Character encoding, character type info, and
1075 transliteration tables are all updated to Unicode 11.0.0, using
1076 generator scripts contributed by Mike FABIAN (Red Hat).
1078 * <math.h> functions that round their results to a narrower type are added
1079 from TS 18661-1:2014 and TS 18661-3:2015:
1081 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
1082 fMxaddfNx functions.
1084 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
1085 fMxsubfNx functions.
1087 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
1088 fMxmulfNx functions.
1090 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
1091 fMxdivfNx functions.
1093 * Two grammatical forms of month names are now supported for the following
1094 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
1095 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
1096 support two grammatical forms in abbreviated month names: Catalan, Greek,
1099 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
1100 include the support for two grammatical forms of month names.
1102 * Building and running on GNU/Hurd systems now works without out-of-tree
1105 * The renameat2 function has been added, a variant of the renameat function
1106 which has a flags argument. If the flags are zero, the renameat2 function
1107 acts like renameat. If the flag is not zero and there is no kernel
1108 support for renameat2, the function will fail with an errno value of
1109 EINVAL. This is different from the existing gnulib function renameatu,
1110 which performs a plain rename operation in case of a RENAME_NOREPLACE
1111 flags and a non-existing destination (and therefore has a race condition
1112 that can clobber the destination inadvertently).
1114 * The statx function has been added, a variant of the fstatat64
1115 function with an additional flags argument. If there is no direct
1116 kernel support for statx, glibc provides basic stat support based on
1117 the fstatat64 function.
1119 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
1120 library if installed. libidn2 version 2.0.5 or later is recommended. If
1121 libidn2 is not available, internationalized domain names are not encoded
1122 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
1123 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
1124 with an encoding error.) Flags which used to change the IDN encoding and
1125 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
1126 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
1127 deprecated. They no longer have any effect.
1129 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
1130 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
1131 range of ELF gABI expressions including such constructs as
1132 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
1133 have been further restricted, and where in the past a dynamic string
1134 token sequence may have been interpreted as a literal string it will
1135 now cause a load failure. These load failures were always considered
1136 unspecified behaviour from the perspective of the dynamic loader, and
1137 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
1138 results in a load failure now.
1140 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
1141 implementation includes all the standard functions provided by
1144 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
1145 thrd_detach, thrd_exit, and thrd_join for thread management.
1147 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
1148 mtx_destroy for mutual exclusion.
1150 - call_once for function call synchronization.
1152 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
1153 cnd_wait for conditional variables.
1155 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
1157 Application developers must link against libpthread to use ISO C threads.
1159 Deprecated and removed features, and other changes affecting compatibility:
1161 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
1162 installed. Software that was using either header should be updated to
1163 use standard <stdio.h> interfaces instead.
1165 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
1166 This was never required by the C standard, and the macros just expanded
1167 to call alternative names for the same functions. If you hoped getc and
1168 putc would provide performance improvements over fgetc and fputc, instead
1169 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
1170 necessary, flockfile and funlockfile.
1172 * All stdio functions now treat end-of-file as a sticky condition. If you
1173 read from a file until EOF, and then the file is enlarged by another
1174 process, you must call clearerr or another function with the same effect
1175 (e.g. fseek, rewind) before you can read the additional data. This
1176 corrects a longstanding C99 conformance bug. It is most likely to affect
1177 programs that use stdio to read interactive input from a terminal.
1180 * The macros 'major', 'minor', and 'makedev' are now only available from
1181 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
1182 headers that happen to include <sys/types.h>. These macros are rarely
1183 used, not part of POSIX nor XSI, and their names frequently collide with
1184 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
1185 further explanation.
1187 <sys/sysmacros.h> is a GNU extension. Portable programs that require
1188 these macros should first include <sys/types.h>, and then include
1189 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
1191 * The tilegx*-*-linux-gnu configurations are no longer supported.
1193 * The obsolete function ustat is no longer available to newly linked
1194 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
1195 function has been deprecated in favor of fstatfs and statfs.
1197 * The obsolete function nfsservctl is no longer available to newly linked
1198 binaries. This function was specific to systems using the Linux kernel
1199 and could not usefully be used with the GNU C Library on systems with
1200 version 3.1 or later of the Linux kernel.
1202 * The obsolete function name llseek is no longer available to newly linked
1203 binaries. This function was specific to systems using the Linux kernel
1204 and was not declared in a header. Programs should use the lseek64 name
1205 for this function instead.
1207 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
1208 getaddrinfo and getnameinfo functions have been deprecated. The behavior
1209 previously selected by them is now always enabled.
1211 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
1212 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
1213 restriction (rejecting '_' in host names, among other things) has been
1214 removed, for increased compatibility with non-IDN name resolution.
1216 * The fcntl function now have a Long File Support variant named fcntl64. It
1217 is added to fix some Linux Open File Description (OFD) locks usage on non
1218 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
1219 fcntl and LFS support is handled transparently. Also for Linux, the OFD
1220 locks act as a cancellation entrypoint.
1222 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
1223 ecb_crypt, and des_setparity are no longer available to newly linked
1224 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
1225 longer installed. These functions encrypted and decrypted data with the
1226 DES block cipher, which is no longer considered secure. Software that
1227 still uses these functions should switch to a modern cryptography library,
1230 * Reflecting the removal of the encrypt and setkey functions above, the
1231 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
1232 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1235 * The obsolete function fcrypt is no longer available to newly linked
1236 binaries. It was just another name for the standard function crypt,
1237 and it has not appeared in any header file in many years.
1239 * We have tentative plans to hand off maintenance of the passphrase-hashing
1240 library, libcrypt, to a separate development project that will, we hope,
1241 keep up better with new passphrase-hashing algorithms. We will continue
1242 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1243 'crypt_r' should not need to change at all; however, distributions will
1244 need to install <crypt.h> and libcrypt from a separate project.
1246 In this release, if the configure option --disable-crypt is used, glibc
1247 will not install <crypt.h> or libcrypt, making room for the separate
1248 project's versions of these files. The plan is to make this the default
1249 behavior in a future release.
1251 Changes to build and runtime requirements:
1253 GNU make 4.0 or later is now required to build glibc.
1255 Security related changes:
1257 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1258 been fixed by removing the glibc-internal IDNA implementation and using
1259 the system-provided libidn2 library instead. Originally reported by Hanno
1260 Böck and Christian Weisgerber.
1262 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1263 architecture could corrupt memory. Reported by Max Horn.
1265 CVE-2018-11236: Very long pathname arguments to realpath function could
1266 result in an integer overflow and buffer overflow. Reported by Alexey
1269 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1270 architecture could write beyond the target buffer, resulting in a buffer
1271 overflow. Reported by Andreas Schwab.
1273 The following bugs are resolved with this release:
1275 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1276 [6889] manual: 'PWD' mentioned but not specified
1277 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1278 when __WORDSIZE != 64
1279 [13762] regex: re_search etc. should return -2 on memory exhaustion
1280 [13888] build: /tmp usage during testing
1281 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1282 [14092] nptl: Support C11 threads
1283 [14095] localedata: Review / update collation data from Unicode / ISO
1285 [14508] libc: -Wformat warnings
1286 [14553] libc: Namespace pollution loff_t in sys/types.h
1287 [14890] libc: Make NT_PRFPREG canonical.
1288 [15105] libc: Extra PLT references with -Os
1289 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1291 [16335] manual: Feature test macro documentation incomplete and out of
1293 [16552] libc: Unify umount implementations in terms of umount2
1294 [17082] libc: htons et al.: statement-expressions prevent use on global
1295 scope with -O1 and higher
1296 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1297 [17438] localedata: pt_BR: wrong d_fmt delimiter
1298 [17662] libc: please implement binding for the new renameat2 syscall
1299 [17721] libc: __restrict defined as /* Ignore */ even in c11
1300 [17979] libc: inconsistency between uchar.h and stdint.h
1301 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1302 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1303 horrible machine code)
1304 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1306 [18471] libc: llseek should be a compat symbol
1307 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1309 [18991] nss: nss_files skips large entry in database
1310 [19239] libc: Including stdlib.h ends up with macros major and minor being
1312 [19463] libc: linknamespace failures when compiled with -Os
1313 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1314 [19527] locale: Normalized charset name not recognized by setlocale
1315 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1316 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1318 [19728] network: out of bounds stack read in libidn function
1319 idna_to_ascii_4i (CVE-2016-6261)
1320 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1321 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1322 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1324 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1325 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1326 [20419] dynamic-link: files with large allocated notes crash in
1328 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1329 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1330 [20980] manual: CFLAGS environment variable replaces vital options
1331 [21163] regex: Assertion failure in pop_fail_stack when executing a
1332 malformed regexp (CVE-2015-8985)
1333 [21234] manual: use of CFLAGS makes glibc detect no optimization
1334 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1335 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1336 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1337 [21508] locale: intl/tst-gettext failure with latest msgfmt
1338 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1339 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1340 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1342 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1344 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1345 [22247] network: Integer overflow in the decode_digit function in
1346 puny_decode.c in libidn (CVE-2017-14062)
1347 [22342] nscd: NSCD not properly caching netgroup
1348 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1349 [22550] localedata: es_ES locale (and other es_* locales): collation
1350 should treat ñ as a primary different character, sync the collation
1351 for Spanish with CLDR
1352 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1353 by gcc configured with --enable-default-pie
1354 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1355 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1356 crossing 2GB threshold (CVE-2017-18269)
1357 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1359 [22735] time: Misleading typo in time.h source comment regarding
1361 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1362 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1363 `__assert_perror_fail ()' to `__assert_fail_base ()'
1364 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1366 [22786] libc: Stack buffer overflow in realpath() if input size is close
1367 to SSIZE_MAX (CVE-2018-11236)
1368 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1369 through an absolute DT_NEEDED path
1370 [22792] build: tcb-offsets.h dependency dropped
1371 [22797] libc: pkey_get() uses non-reserved name of argument
1372 [22807] libc: PTRACE_* constants missing for powerpc
1373 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1374 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1375 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1376 [22848] localedata: ca_ES: update date definitions from CLDR
1377 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1378 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1379 [22896] localedata: Update locale data for an_ES
1380 [22902] math: float128 test failures with GCC 8
1381 [22918] libc: multiple common of `__nss_shadow_database'
1382 [22919] libc: sparc32: backtrace yields infinite backtrace with
1384 [22926] libc: FTBFS on powerpcspe
1385 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1387 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1388 [22947] libc: FAIL: misc/tst-preadvwritev2
1389 [22963] localedata: cs_CZ: Add alternative month names
1390 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1391 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1392 [22998] dynamic-link: execstack tests are disabled when SELinux is
1394 [23005] network: Crash in __res_context_send after memory allocation
1396 [23007] math: strtod cannot handle -nan
1397 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1398 [23036] regex: regex equivalence class regression
1399 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1400 [23069] libc: sigaction broken on riscv64-linux-gnu
1401 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1402 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1403 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1404 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1405 and libc build with -Os)
1406 [23140] localedata: More languages need two forms of month names
1407 [23145] libc: _init/_fini aren't marked as hidden
1408 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1409 [23171] math: C++ iseqsig for long double converts arguments to double
1410 [23178] nscd: sudo will fail when it is run in concurrent with commands
1411 that changes /etc/passwd
1412 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1414 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1415 [23208] localedata: New locale - Lower Sorbian (dsb)
1416 [23233] regex: Memory leak in build_charclass_op function in file
1418 [23236] stdio: Harden function pointers in _IO_str_fields
1419 [23250] nptl: Offset of __private_ss differs from GCC
1420 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1421 -mtune=generic -mfpmath=sse
1422 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1424 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1425 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1427 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1428 [23277] math: nan function should not have const attribute
1429 [23279] math: scanf and strtod wrong for some hex floating-point
1430 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1432 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1433 [23303] build: undefined reference to symbol
1434 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1435 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1437 [23313] stdio: libio vtables validation and standard file object
1439 [23329] libc: The __libc_freeres infrastructure is not properly run across
1441 [23349] libc: Various glibc headers no longer compatible with
1443 [23351] malloc: Remove unused code related to heap dumps and malloc
1445 [23363] stdio: stdio-common/tst-printf.c has non-free license
1446 [23396] regex: Regex equivalence regression in single-byte locales
1447 [23422] localedata: oc_FR: More updates of locale data
1448 [23442] build: New warning with GCC 8
1449 [23448] libc: Out of bounds access in IBM-1390 converter
1450 [23456] libc: Wrong index_cpu_LZCNT
1451 [23458] build: tst-get-cpu-features-static isn't added to tests
1452 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1454 [23467] dynamic-link: x86/CET: A property note parser bug
1461 * The GNU C Library can now be compiled with support for building static
1462 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1463 executables are like static executables but can be loaded at any address
1464 and provide additional security hardening benefits at the cost of some
1465 memory and performance. When the library is built with --enable-static-pie
1466 the resulting libc.a is usable with GCC 8 and above to create static PIE
1467 executables using the GCC option '-static-pie'. This feature is currently
1468 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1469 aarch64 with binutils 2.30 or later.
1471 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1472 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1475 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1477 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1479 * In order to support faster and safer process termination the malloc API
1480 family of functions will no longer print a failure address and stack
1481 backtrace after detecting heap corruption. The goal is to minimize the
1482 amount of work done after corruption is detected and to avoid potential
1483 security issues in continued process execution. Reducing shutdown time
1484 leads to lower overall process restart latency, so there is benefit both
1485 from a security and performance perspective.
1487 * The abort function terminates the process immediately, without flushing
1488 stdio streams. Previous glibc versions used to flush streams, resulting
1489 in deadlocks and further data corruption. This change also affects
1490 process aborts as the result of assertion failures.
1492 * On platforms where long double has the IEEE binary128 format (aarch64,
1493 alpha, mips64, riscv, s390 and sparc), the math library now implements
1494 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1495 These are the same interfaces added in version 2.26 for some platforms where
1496 this format is supported but is not the format of long double.
1498 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1499 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1500 implements interfaces for that type, as defined by ISO/IEC TS
1501 18661-3:2015. These are corresponding interfaces to those supported for
1504 * The math library now implements interfaces for the _Float32, _Float64 and
1505 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1506 corresponding interfaces to those supported for _Float128.
1508 * glibc now implements the memfd_create and mlock2 functions on Linux.
1510 * Support for memory protection keys was added. The <sys/mman.h> header now
1511 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1514 * The copy_file_range function was added.
1516 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1518 * The ldconfig utility now processes `include' directives using the C/POSIX
1519 collation ordering. Previous glibc versions used locale-specific
1520 ordering, the change might break systems that relied on that.
1522 * Support for two grammatical forms of month names has been added.
1523 In a call to strftime, the "%B" and "%b" format specifiers will now
1524 produce the grammatical form required when the month is used as part
1525 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1526 required when the month is named by itself. For instance, in Greek
1527 and in many Slavic and Baltic languages, "%B" will produce the month
1528 in genitive case, and "%OB" will produce the month in nominative case.
1530 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1531 are all valid and will all accept any known form of month
1532 name---standalone or complete, abbreviated or full. In a call to
1533 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1534 the strings used by "%B" and "%b", respectively. New query
1535 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1536 used by "%OB" and "%Ob", respectively.
1538 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1539 define the strings for %OB and %Ob, respectively; these have the
1540 same syntax as "mon" and "abmon". These arrays are optional; if they
1541 are not provided then they have the same content as "mon" and "abmon",
1544 These features are provided for locales which define "alt_mon" and/or
1545 "ab_alt_mon" in their locale source data. This release includes such
1546 alternative month name data for the following languages: Belarusian,
1547 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1549 This feature is currently a GNU extension, but it is expected to
1550 be added to the next revision of POSIX, and it is also already
1551 available on some BSD-derived operating systems.
1553 This feature will cause existing statically compiled applications
1554 to fail to load locales and fall back to the builtin C/POSIX locales.
1555 See notes below for other changes affecting compatibility.
1557 * Support for the RISC-V ISA running on Linux has been added. This port
1558 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1559 for the following ISA and ABI pairs:
1565 Deprecated and removed features, and other changes affecting compatibility:
1567 * Statically compiled applications attempting to load locales compiled for the
1568 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1569 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1570 support for two grammatical forms of the month names, also extends the locale
1571 data binary format. Static applications needing locale support must be
1572 recompiled to match the runtime and data they are deployed with. In some
1573 distributions there is an upgrade window where dynamically linked applications
1574 may use a new library but the old locale data and also fall back to the
1575 builtin C/POSIX locales; restarting the application process is sufficient to
1578 * Support for statically linked applications which call dlopen is deprecated
1579 and will be removed in a future version of glibc. Applications which call
1580 dlopen need to be linked dynamically instead.
1582 * Support for old programs which use internal stdio data structures and
1583 functions is deprecated. This includes programs which use the C++ streams
1584 provided by libstdc++ in GCC 2.95. Programs which use the internal
1585 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1586 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1587 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1588 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1589 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1590 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1591 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1592 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1593 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1594 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1595 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1596 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1597 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1598 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1599 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1600 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1601 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1602 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1603 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1604 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1605 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1606 future version of glibc. Unlike other symbol removals, these old
1607 applications will not be supported using compatibility symbols.
1609 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1610 defined by <sys/ptrace.h>.
1612 * libm no longer supports SVID error handling (calling a user-provided
1613 matherr function on error) or the _LIB_VERSION variable to control error
1614 handling. (SVID error handling and the _LIB_VERSION variable still work
1615 for binaries linked against older versions of the GNU C Library.) The
1616 libieee.a library is no longer provided. math.h no longer defines struct
1617 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1618 TLOSS, PLOSS and HUGE.
1620 * The libm functions pow10, pow10f and pow10l are no longer supported for
1621 new programs. Programs should use the standard names exp10, exp10f and
1622 exp10l for these functions instead.
1624 * The mcontext_t type is no longer the same as struct sigcontext. On
1625 platforms where it was previously the same, this changes the C++ name
1626 mangling for interfaces involving this type.
1628 * The add-ons mechanism for building additional packages at the same time as
1629 glibc has been removed. The --enable-add-ons configure option is now
1632 * The --without-fp configure option is now ignored. Whether hardware
1633 floating-point instructions are used is now configured based on whether
1634 the compiler used at configure time (without any options implied by a
1635 --with-cpu= configure option) uses such instructions.
1637 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1638 the specified string can be parsed as a domain name.
1640 * In the malloc_info output, the <heap> element may contain another <aspace>
1641 element, "subheaps", which contains the number of sub-heaps.
1643 * The libresolv function p_secstodate is no longer supported for new
1646 * The tilepro-*-linux-gnu configuration is no longer supported.
1648 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1649 and will be removed in a future release. Software that is still using
1650 either header should be updated to use standard <stdio.h> interfaces
1653 libio.h was originally the header for a set of supported GNU extensions,
1654 but they have not been maintained as such in many years, they are now
1655 standing in the way of improvements to stdio, and we don't think there are
1656 any remaining external users. _G_config.h was never intended for public
1657 use, but predates the bits convention.
1659 Changes to build and runtime requirements:
1661 * bison version 2.7 or later is required to generate code in the 'intl'
1664 Security related changes:
1666 CVE-2009-5064: The ldd script would sometimes run the program under
1667 examination directly, without preventing code execution through the
1668 dynamic linker. (The glibc project disputes that this is a security
1669 vulnerability; only trusted binaries must be examined using the ldd
1672 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1673 suffered from a one-byte overflow during ~ operator processing (either
1674 on the stack or the heap, depending on the length of the user name).
1675 Reported by Tim Rühsen.
1677 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1678 would sometimes fail to free memory allocated during ~ operator
1679 processing, leading to a memory leak and, potentially, to a denial
1682 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1683 without GLOB_NOESCAPE, could write past the end of a buffer while
1684 unescaping user names. Reported by Tim Rühsen.
1686 CVE-2017-17426: The malloc function, when called with an object size near
1687 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1688 instead of NULL. This was a regression introduced with the new malloc
1689 thread cache in glibc 2.26. Reported by Iain Buclaw.
1691 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1692 to the allocation of too much memory. (This is not a security bug per se,
1693 it is mentioned here only because of the CVE assignment.) Reported by
1696 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1697 of the number of search path components. (This is not a security
1698 vulnerability per se because no trust boundary is crossed if the fix for
1699 CVE-2017-1000366 has been applied, but it is mentioned here only because
1700 of the CVE assignment.) Reported by Qualys.
1702 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1703 for AT_SECURE or SUID binaries could be used to load libraries from the
1706 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1707 succeeds without returning an absolute path due to unexpected behaviour
1708 of the Linux kernel getcwd syscall. Reported by halfdog.
1710 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1711 an object size near the value of SIZE_MAX, would return a pointer to a
1712 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1714 CVE-2018-6551: The malloc function, when called with an object size near
1715 the value of SIZE_MAX, would return a pointer to a buffer which is too
1716 small, instead of NULL.
1718 The following bugs are resolved with this release:
1720 [866] glob: glob should match dangling symlinks
1721 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1722 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1724 [5997] math: Very slow execution of sinf function
1725 [10580] localedata: hr_HR: updated locale
1726 [10871] locale: 'mon' array should contain both nominative and genitive
1728 [12349] localedata: eu_ES: incorrect thousands separator
1729 [13605] localedata: shn_MM: new Shan locale
1730 [13805] localedata: ru_RU: currency should use ',' as radix point
1731 [13953] localedata: km_KH: locale update
1732 [13994] localedata: mjw_IN: new locale
1733 [14121] build: make writes .mo files in po directory
1734 [14333] libc: Fix the race between atexit() and exit()
1735 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1736 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1738 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1739 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1740 width Latin characters
1741 [15332] localedata: es_CU: locale update
1742 [15436] stdio: Don't close or flush stdio streams on abort
1743 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1745 [16148] localedata: ca_ES: incorrect thousands separator
1746 [16750] dynamic-link: ldd should not try to execute the binaries
1748 [16777] localedata: pl_PL: incorrect thousands separator in locale
1749 [16905] localedata: hanzi: new collation
1750 [17563] localedata: cmn_TW: add hanzi collation
1751 [17750] localedata: wrong collation order of diacritics in most locales
1752 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1754 [17956] build: Build fails on missing definitions from header file
1755 nss/nss.h when Mozilla NSS is used for cryptography
1756 [18203] libc: realpath() does not handle unreachable paths correctly
1757 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1758 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1759 [18822] libc: Internal functions are called via PLT
1760 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1761 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1762 [19574] libc: glibc should support building static PIE binaries
1763 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1765 [19971] glob: glob: Do not skip entries with zero d_ino values
1766 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1767 [20008] localedata: km_KH: convert to translit_neutral
1768 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1769 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1770 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1771 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1772 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1774 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1775 they're set, wrong errors returned by gaih_inet when lookup functions
1777 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1778 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1780 [20952] localedata: yuw_PG: new locale
1781 [21084] localedata: charmaps/IBM858: new codepage
1782 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1783 [21242] libc: assert gives pedantic warning in old gcc versions
1784 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1785 __regcall calling convention
1786 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1787 [21326] libc: C99 functions are not declared for C++11 and later if
1788 _GNU_SOURCE is not predefined by g++
1789 [21457] libc: sys/ucontext.h namespace
1790 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1791 [21660] math: GCC fails to compile a formula with tgmath.h
1792 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1793 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1794 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1795 [21684] math: tgmath.h handling of complex integers
1796 [21685] math: tgmath.h handling of bit-fields
1797 [21686] math: tgmath.h handling of __int128
1798 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1800 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1802 [21750] localedata: column width of characters incompatible with classical
1804 [21754] malloc: malloc: Perform as little work as possible after heap
1805 consistency check failures
1806 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1807 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1808 [21791] string: Unused XXX_chk_XXX functions in libc.a
1809 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1811 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1813 [21845] localedata: Added new Locale bho_NP
1814 [21853] localedata: Fix abday Which looks same as day in zh_SG
1815 [21854] localedata: Added New Locale en_SC
1816 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1817 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1818 _dl_runtime_resolve_avx_slow
1819 [21885] network: getaddrinfo: gethosts does not release resolver context
1820 on memory allocation failure
1821 [21899] libc: XPG4.2 sigaction namespace
1822 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1824 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1826 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1827 errno value, causing getaddrinfo to fail
1828 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1829 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1830 instead of EAI_NODATA
1831 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1832 constant PTRACE_SEIZE_DEVEL
1833 [21930] math: C-only gcc builtins used in <math.h> isinf
1834 [21932] network: Unpaired __resolv_context_get in generic get*_r
1836 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1837 [21944] libc: sigval namespace
1838 [21951] localedata: Update hanzi collation by stroke
1839 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1840 sysdeps/x86_64/fpu/e_expf.S
1841 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1842 allocation in syscall loops)
1843 [21959] localedata: Fix Country name for xh_ZA
1844 [21960] localedata: Fix abmon for bem_ZM
1845 [21966] math: AVX2 mathvec functions use FMA without checking
1846 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1847 [21971] localedata: Added New Locale for mfe_MU
1848 [21972] libc: assert macro requires operator== (int) for its argument type
1849 [21973] math: [sparc] libm missing sqrtl compat symbol
1850 [21974] libc: Remove __bb_init_func and __bb_exit_func
1851 [21982] string: stratcliff.c: error: assuming signed overflow does not
1853 [21986] stdio: __guess_grouping is called incorrectly
1854 [21987] math: [sparc32] wrong bits/long-double.h installed
1855 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1857 [22022] localedata: Missing country_name for mni_IN
1858 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1860 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1862 [22026] locale: iconv_open: heap overflow on gconv_init failure
1863 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1864 [22035] math: [m68k] bits/math-inline.h macro namespace
1865 [22038] localedata: Fix abbreviated weeks and months for Somali
1866 [22044] localedata: Remove redundant data for Limburgish Language
1867 [22050] malloc: Linking with -lmcheck does not hook
1868 __malloc_initialize_hook correctly
1869 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1870 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1871 [22070] localedata: charmaps/UTF-8: wcwidth for
1872 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1873 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1874 Jungseong and Jongseong) should be 0
1875 [22078] nss: nss_files performance issue in multi mode
1876 [22082] math: bits/math-finite.h exp10 condition
1877 [22086] libc: pcprofiledump incorrect cross-endian condition
1878 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1879 [22095] network: Name server address allocation memory leak in resolv.conf
1881 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1883 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1884 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1886 [22111] malloc: malloc: per thread cache is not returned when thread exits
1887 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1888 [22134] libc: [linux] implement fexecve with execveat
1889 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1891 [22145] libc: ttyname() gives up too early in the face of namespaces
1892 [22146] math: C++ build issue with float128 on x86_64
1893 [22153] nptl: nptl: save error code before process termination
1894 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1895 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1896 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1897 [22165] libc: [hppa] Text relocations in libc.so
1898 [22180] libc: destructor registered via __cxa_atexit is called twice
1899 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1900 symlinks") cause "make" segfaults
1901 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1903 [22207] libc: FAIL: stdlib/test-atexit-race
1904 [22225] math: nearbyint arithmetic moved before feholdexcept
1905 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1906 [22235] math: iscanonical in C++ and float128
1907 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1908 the svid compat wrapper
1909 [22244] math: ynf and yn are wrong without the svid compat wrapper
1910 [22273] libc: Improper assert in Linux posix_spawn implementation
1911 [22284] libc: -pg -pie doesn't work
1912 [22292] locale: localedef exits with error 4 when it should be error 1
1913 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1914 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1916 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1917 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1919 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1920 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1921 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1922 [22322] libc: [mips64] wrong bits/long-double.h installed
1923 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1924 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1926 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1927 [22343] malloc: Integer overflow in posix_memalign
1928 [22347] libc: getrandom() returns the number of bytes that were copied to
1929 the buffer even though the comments say "Return 0 on success and -1 on
1931 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1932 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1934 [22370] dynamic-link: Incorrect note padding check
1935 [22375] libc: malloc returns pointer from tcache_get when should return
1936 NULL (CVE-2017-17426)
1937 [22377] math: iseqsig, float128 and C++
1938 [22382] localedata: Error in tpi_PG locale
1939 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1940 inside the ASCII printable range
1941 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1943 [22403] localedata: Slash needs escaping in some locales
1944 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1945 [22409] network: res_hnok does not accept some host names used on the
1947 [22412] network: res_dnok, res_hnok should perform syntax checks
1948 [22413] network: ns_name_pton ignores syntactically invalid trailing
1950 [22415] stdio: setvbuf can lead to invalid free/segfault
1951 [22432] build: Non-deterministic build
1952 [22439] malloc: malloc_info should compute summary statistics for all sub-
1954 [22442] network: if_nametoindex could report index for the wrong
1955 networking interface
1956 [22446] build: aliasing violation calling readlink in handle_request
1957 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1958 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1959 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1960 __nscd_hash/__nss_hash
1961 [22463] network: p_secstodate overflow handling
1962 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1963 [22478] libc: sigwait can fail with EINTR
1964 [22505] libc: ldconfig processes include directive in locale-specific
1966 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1967 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1968 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1969 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1970 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1971 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1972 same as for Croatian
1973 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1974 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1975 [22577] libc: missing newline after "cannot allocate TLS data structures
1977 [22588] manual: manual/conf.texi: missing underscore in front of
1979 [22593] math: nextafter and nexttoward are declared with const attribute
1980 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1981 [22603] string: ia64 memchr overflows internal pointer check
1982 [22605] libc: SH clone does not set the exit code correctly
1983 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1985 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1986 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1987 modified in case of success
1988 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
1989 [22615] manual: manual: ambiguous wording about errno value in case of
1991 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1993 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1994 binaries or if /proc is not mounted (CVE-2017-16997)
1995 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1996 [22630] build: $(no-pie-ldflag) is no longer effective
1997 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1998 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1999 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
2000 [22637] nptl: guard size is subtracted from thread stack size instead of
2002 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
2003 [22657] localedata: hu_HU: Avoid double space in date
2004 [22660] math: fmax, fmin sNaN handling on alpha
2005 [22664] libc: New warning of GCC8
2006 [22665] math: alpha: ceil and floor raise inexact exceptions
2007 [22666] math: alpha: trunc raise inexact exceptions
2008 [22667] libc: makecontext lacks stack alignment on i386
2009 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
2010 [22679] libc: getcwd(3) can succeed without returning an absolute path
2012 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
2013 elision and tunables
2014 [22687] math: [powerpc-nofpu] complex long double functions spurious
2016 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
2017 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
2018 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
2020 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
2021 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
2023 [22701] nis: Incomplete removal of libnsl
2024 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
2025 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
2026 [22715] dynamic-link: FAIL: elf/tst-audit10
2027 [22719] libc: Backtrace tests fail on hppa
2028 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
2029 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
2030 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
2031 before the first call to crypt_r () in crypt/badsalttest.c
2038 * A per-thread cache has been added to malloc. Access to the cache requires
2039 no locks and therefore significantly accelerates the fast path to allocate
2040 and free small amounts of memory. Refilling an empty cache requires locking
2041 the underlying arena. Performance measurements show significant gains in a
2042 wide variety of user workloads. Workloads were captured using a special
2043 instrumented malloc and analyzed with a malloc simulator. Contributed by
2044 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
2046 * Unicode 10.0.0 Support: Character encoding, character type info, and
2047 transliteration tables are all updated to Unicode 10.0.0, using
2048 generator scripts contributed by Mike FABIAN (Red Hat).
2049 These updates cause user visible changes, especially the changes in
2050 wcwidth for many emoji characters cause problems when emoji sequences
2051 are rendered with pango, see for example:
2052 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
2054 * Collation of Hungarian has been overhauled and is now consistent with "The
2055 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
2058 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
2060 - The GNU C Library will now detect when /etc/resolv.conf has been
2061 modified and reload the changed configuration. The new resolver option
2062 “no-reload” (RES_NORELOAD) disables this behavior.
2064 - The GNU C Library now supports an arbitrary number of search domains
2065 (configured using the “search” directive in /etc/resolv.conf);
2066 previously, there was a hard limit of six domains. For backward
2067 compatibility, applications that directly modify the ‘_res’ global
2068 object are still limited to six search domains.
2070 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
2071 Library will now randomly pick a name server from the configuration as a
2072 starting point. (Previously, the second name server was always used.)
2074 * The tunables feature is now enabled by default. This allows users to tweak
2075 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
2077 * New function reallocarray, which resizes an allocated block (like realloc)
2078 to the product of two sizes, with a guaranteed clean failure upon integer
2079 overflow in the multiplication. Originally from OpenBSD, contributed by
2080 Dennis Wölfing and Rüdiger Sonderfeld.
2082 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
2083 These are extended versions of preadv and pwritev, respectively, taking an
2084 additional flags argument. The set of supported flags depends on the
2085 running kernel; full support currently requires kernel 4.7 or later.
2087 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
2088 create a new session ID for the spawned process. This feature is
2089 scheduled to be added to the next major revision of POSIX; for the time
2090 being, it is available under _GNU_SOURCE.
2092 * errno.h is now safe to use from C-preprocessed assembly language on all
2093 supported operating systems. In this context, it will only define the
2094 Exxxx constants, as preprocessor macros expanding to integer literals.
2096 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
2097 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
2098 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
2099 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
2101 To compile programs that use this feature, the compiler must support
2102 128-bit floating point with the type name _Float128 (as defined by TS
2103 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
2104 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
2105 must be defined to make the new interfaces visible.
2107 The new functions and macros correspond to those present for other
2108 floating-point types (except for a few obsolescent interfaces not
2109 supported for the new type), with F128 or f128 suffixes; for example,
2110 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
2111 printf or scanf formats for the new type; the strfromf128 and strtof128
2112 interfaces should be used instead.
2114 Deprecated and removed features, and other changes affecting compatibility:
2116 * The synchronization that pthread_spin_unlock performs has been changed to
2117 now be equivalent to a C11 atomic store with release memory order to the
2118 spin lock's memory location. Previously, several (but not all)
2119 architectures used stronger synchronization (e.g., containing what is
2120 often called a full barrier). This change can improve performance, but
2121 may affect odd fringe uses of spin locks that depend on the previous
2122 behavior (e.g., using spin locks as atomic variables to try to implement
2123 Dekker's mutual exclusion algorithm).
2125 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
2128 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
2129 will only be built and installed when the GNU C Library is configured with
2130 --enable-obsolete-rpc. This allows alternative RPC implementations, such
2131 as TIRPC or rpcsvc-proto, to be used.
2133 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
2134 libnss_compat, are deprecated, and will not be built or installed by
2137 The NIS(+) support library, libnsl, is also deprecated. By default, a
2138 compatibility shared library will be built and installed, but not headers
2139 or development libraries. Only a few NIS-related programs require this
2140 library. (In particular, the GNU C Library has never required programs
2141 that use 'gethostbyname' to be linked with libnsl.)
2143 Replacement implementations based on TIRPC, which additionally support
2144 IPv6, are available from <https://github.com/thkukuk/>. The configure
2145 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
2146 name service modules, to be built and installed.
2148 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
2149 support is enabled, the configured recursive resolver must support EDNS.
2150 (Responding to EDNS-enabled queries with responses which are not
2151 EDNS-enabled is fine, but FORMERR responses are not.)
2153 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
2154 servers have not supported this opcode for a long time.
2156 * The _res_opcodes variable has been removed from libresolv. It had been
2157 exported by accident.
2159 * <string.h> no longer includes inline versions of any string functions,
2160 as this kind of optimization is better done by the compiler. The macros
2161 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
2163 * The nonstandard header <xlocale.h> has been removed. Most programs should
2164 use <locale.h> instead. If you have a specific need for the definition of
2165 locale_t with no other declarations, please contact
2166 libc-alpha@sourceware.org and explain.
2168 * The obsolete header <sys/ultrasound.h> has been removed.
2170 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
2172 * The obsolete function cfree has been removed. Applications should use
2175 * The stack_t type no longer has the name struct sigaltstack. This changes
2176 the C++ name mangling for interfaces involving this type.
2178 * The ucontext_t type no longer has the name struct ucontext. This changes
2179 the C++ name mangling for interfaces involving this type.
2181 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
2182 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
2183 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
2184 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
2185 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
2186 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
2187 fpregset_t type no longer has the name struct fpu. This changes the C++
2188 name mangling for interfaces involving those types.
2190 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
2191 synced with the kernel:
2193 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
2194 are not supported on this architecture and have been removed.
2196 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
2197 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
2198 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
2200 Programs that assume the GET/SETREGS ptrace requests are universally
2201 available will now fail to build, instead of malfunctioning at runtime.
2203 Changes to build and runtime requirements:
2205 * Linux kernel 3.2 or later is required at runtime, on all architectures
2206 supported by that kernel. (This is a change from version 2.25 only for
2209 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
2211 * On most architectures, GCC 4.9 or later is required to build the GNU C
2212 Library. On powerpc64le, GCC 6.2 or later is required.
2214 Older GCC versions and non-GNU compilers are still supported when
2215 compiling programs that use the GNU C Library. (We do not know exactly
2216 how old, and some GNU extensions to C may be _de facto_ required. If you
2217 are interested in helping us make this statement less vague, please
2218 contact libc-alpha@sourceware.org.)
2220 Security related changes:
2222 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
2223 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
2225 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
2226 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
2228 * Avoid printing a backtrace from the __stack_chk_fail function since it is
2229 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
2232 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
2233 fixed (CVE-2017-12133).
2235 The following bugs are resolved with this release:
2237 [984] network: Respond to changed resolv.conf in gethostbyname
2238 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2239 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2241 [12189] libc: __stack_chk_fail should not attempt a backtrace
2243 [14096] time: Race condition on timezone/tst-timezone.out
2244 [14172] localedata: az_IR: new locale
2245 [14995] build: glibc fails to build if gold is the default linker, even if
2247 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2248 [16637] network: inet_pton function is accepting IPv6 with bad format
2249 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2250 x86 and other generic code
2251 [16875] localedata: ko_KR: fix lang_name
2252 [17225] localedata: ar_SY: localized month names for May and June are
2254 [17297] localedata: da_DK: wrong date_fmt string
2255 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2256 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2257 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2258 [19066] localedata: ar_SA abbreviated day and month names are in English
2259 [19569] network: resolv: Support an arbitrary number of search domains
2260 [19570] network: Implement random DNS server selection in the stub
2262 [19838] locale: localedef fails on PA-RISC
2263 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2264 order of 0D36 and 0D37
2265 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2267 [20098] libc: FAIL: debug/backtrace-tst on hppa
2268 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2270 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2272 [20313] localedata: Update locale data to Unicode 9.0
2273 [20424] manual: Document how to provide a malloc replacement
2274 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2276 [20686] locale: Add el_GR@euro to SUPPORTED.
2277 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2278 failures consistently
2279 [21015] dynamic-link: Document and fix --enable-bind-now
2280 [21016] nptl: pthread_cond support is broken on hppa
2281 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2282 frame-pointer on i386
2283 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2285 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2286 [21088] libc: Build fails with --enable-static-nss
2287 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2288 generic c code is used
2289 [21109] libc: Tunables broken on big-endian
2290 [21112] math: powf has large ulp errors with base close to 1 and exponent
2292 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2294 [21120] malloc: glibc malloc is incompatible with GCC 7
2295 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2297 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2298 (-0.0) when linking with -lieee
2299 [21171] math: log10, log2 and lgamma return incorrect results
2300 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2301 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2302 [21207] localedata: ce_RU: update weekdays from CLDR
2303 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2304 [21217] localedata: Update months from CLDR-31
2305 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2306 [21243] libc: support_delete_temp_file should issue warning for failed
2308 [21244] libc: support resolv_test_start() socket fd close should be
2310 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2311 new posix_spawn implementation
2312 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2313 leads to lower CPU frequency
2314 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2315 [21261] libc: [sparc64] bits/setjmp.h namespace
2316 [21267] network: [mips] bits/socket.h IOC* namespace
2317 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2318 [21270] libc: mmap64 silently truncates large offset values
2319 [21275] libc: posix_spawn always crashes on ia64 now
2320 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2321 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2322 [21289] libc: Incorrect declaration for 32-bit platforms with
2323 _FILE_OFFSET_BITS=64 causes build error
2324 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2325 not support gethostbyname4_r
2326 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2328 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2330 [21340] libc: Support POSIX_SPAWN_SETSID
2331 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2332 [21359] network: ns_name_pack needs additional byte in destination buffer
2333 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2334 against fragmentation attacks (CVE-2017-12132)
2335 [21369] network: resolv: Remove EDNS fallback
2336 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2338 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2339 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2340 [21393] stdio: Missing dup3 error check in freopen, freopen64
2341 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2342 [21399] localedata: Bad description for U00EC in
2343 localedata/charmaps/CP1254
2344 [21411] malloc: realloc documentation error
2345 [21426] network: sys/socket.h uio.h namespace
2346 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2347 [21445] libc: signal.h bsd_signal namespace
2348 [21455] network: Network headers stdint.h namespace
2349 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2351 [21475] network: resolv: Overlong search path is truncated mid-label
2352 [21511] libc: sigstack namespace
2353 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2354 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2355 bits/syscall.h: No such file or directory
2356 [21517] libc: struct sigaltstack namespace
2357 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2358 [21533] localedata: Update locale data to Unicode 10.0
2360 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2361 junk at end of line, first unrecognized character is `@'
2362 [21538] libc: SIG_HOLD missing for XPG4
2363 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2364 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2365 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2366 [21543] libc: sigevent namespace
2367 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2368 size for general purpose registers in mcontext_t structure
2369 [21550] libc: sigwait namespace
2370 [21552] libc: XPG4 bsd_signal namespace
2371 [21554] libc: sigpause namespace
2372 [21560] libc: sys/wait.h signal.h namespace
2373 [21561] libc: waitid namespace
2374 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2375 '/usr/include/stdlib.h': Permission denied
2376 [21575] libc: sys/wait.h missing struct rusage definition
2377 [21584] libc: sigaltstack etc namespace
2378 [21597] libc: siginterrupt namespace
2379 [21607] math: hppa: FAIL: math/test-tgmath
2380 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2382 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2383 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2384 stack and heap (CVE-2017-1000366)
2385 [21625] libc: wait3 namespace
2386 [21654] nss: Incorrect pointer alignment in NSS group merge result
2388 [21657] network: Parse interface zone id for node-local multicast
2389 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2391 [21666] libc: .symver is used on common symbol
2392 [21668] network: resolv: res_init cross-thread broadcast introduces race
2394 [21687] math: tgmath.h totalorder, totalordermag return type
2395 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2397 [21696] libc: Incorrect assumption of of __cpu_mask in
2398 posix/sched_cpucount.c
2399 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2400 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2402 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2403 leading to relocation crash
2404 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2405 `resolv_conf_matches (resp, conf)' failed.
2406 [21710] localedata: Added Samoan language locale for Samoa
2407 [21711] localedata: Pashto yesstr/nostr locale are missing
2408 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2409 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
2410 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2411 [21723] localedata: yesstr/nostr missing for Chinese language locale
2412 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2414 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2416 [21728] localedata: New Locale for Tongan language
2417 [21729] localedata: incorrect LC_NAME fields for hi_IN
2418 [21733] localedata: yesstr and nostr are missing for zh_HK
2419 [21734] localedata: Missing yesstr and nostr are for kw_GB
2420 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2421 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2422 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2423 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2425 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2427 [21749] localedata: Wrong abbreviated day name (“abday”) for
2429 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2430 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2431 [21759] localedata: missing yesstr and nostr for Tigrinya
2432 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2433 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2434 [21767] localedata: Missing Bislama locales
2435 [21768] localedata: Missing yesstr and nostr for aa_ET
2436 [21770] localedata: Missing Field in li_NL
2437 [21778] nptl: Robust mutex may deadlock
2438 [21779] libc: MicroBlaze segfaults when loading libpthread
2439 [21783] localedata: Fix int_select international_call_prefixes
2440 [21784] localedata: Inconsistency in country_isbn
2441 [21788] localedata: Missing Country Postal Abbreviations
2442 [21794] localedata: Added-country_isbn-for-Italy
2443 [21795] localedata: Add/Fix country_isbn for France
2444 [21796] localedata: Added country_isbn for Republic of Korea
2445 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2446 [21799] localedata: Added int_select international_call_prefixes
2447 [21801] localedata: Added int_select international_call_prefixes
2448 [21804] nptl: Double semicolon in thread-shared-types.h
2449 [21807] localedata: LC_ADDRESS fix for pap_CW
2450 [21808] localedata: Fix LC_ADDRESS for pap_AW
2451 [21821] localedata: Added country_name in mai_IN
2452 [21822] localedata: Fix LC_TIME for mai_IN
2453 [21823] localedata: missing yesstr, nostr for sa_IN
2454 [21825] localedata: Fix name_mrs for mag_IN
2455 [21828] localedata: 2.26 changelog should mention user visible changes
2457 [21835] localedata: Added Maithili language locale for Nepal
2458 [21838] localedata: Removed redundant data for the_NP
2459 [21839] localedata: Fix LC_MONETARY for ta_LK
2460 [21844] localedata: Fix Latin characters and Months Sequence.
2461 [21848] localedata: Fix mai_NP Title Name
2466 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2467 24731-2:2010, is supported to enable declarations of functions from that
2468 TR. Note that not all functions from that TR are supported by the GNU C
2471 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2472 18661-1:2014, is supported to enable declarations of functions and macros
2473 from that TS. Note that not all features from that TS are supported by
2476 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2477 18661-4:2015, is supported to enable declarations of functions and macros
2478 from that TS. Note that most features from that TS are not supported by
2481 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2482 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2483 Since the GNU C Library defaults to a much newer revision of POSIX, this
2484 will only affect programs that specifically request an old conformance
2485 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2486 see a change in the visible declarations, but a program compiled with
2487 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2490 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2491 defined by all multithreaded code, but glibc has not required this for
2494 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2495 means that in a future release, the macros “major”, “minor”, and “makedev”
2496 will only be available from <sys/sysmacros.h>.
2498 These macros are not part of POSIX nor XSI, and their names frequently
2499 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2500 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2501 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2504 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2505 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2506 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2508 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2509 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2510 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2511 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2512 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2513 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2514 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2515 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2516 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2517 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2518 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2521 * New <math.h> features are added from TS 18661-1:2014:
2523 - Signaling NaN macros: SNANF, SNAN, SNANL.
2525 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2526 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2527 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2529 - llogb functions: the llogb, llogbf and llogbl functions, and the
2530 FP_LLOGB0 and FP_LLOGBNAN macros.
2532 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2535 - Comparison macros: iseqsig.
2537 - Classification macros: iscanonical, issubnormal, iszero.
2539 - Total order functions: totalorder, totalorderf, totalorderl,
2540 totalordermag, totalordermagf, totalordermagl.
2542 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2544 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2545 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2547 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2548 are added to libc. They convert a floating-point number into string.
2550 * Most of glibc can now be built with the stack smashing protector enabled.
2551 It is recommended to build glibc with --enable-stack-protector=strong.
2552 Implemented by Nick Alcock (Oracle).
2554 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2555 intended to be used instead of memset() to erase sensitive data after use;
2556 the compiler will not optimize out calls to explicit_bzero even if they
2557 are "unnecessary" (in the sense that no _correct_ program can observe the
2558 effects of the memory clear).
2560 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2561 to float instead of double. This does not affect the ABI of any libraries
2562 that are part of the GNU C Library, but may affect the ABI of other
2563 libraries that use this type in their interfaces.
2565 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2566 float_t and double_t types are now defined to long double instead of float
2567 and double. These options are not the default, and this does not affect
2568 the ABI of any libraries that are part of the GNU C Library, but it may
2569 affect the ABI of other libraries that use this type in their interfaces,
2570 if they are compiled or used with those options.
2572 * The getentropy and getrandom functions, and the <sys/random.h> header file
2575 * The buffer size for byte-oriented stdio streams is now limited to 8192
2576 bytes by default. Previously, on Linux, the default buffer size on most
2577 file systems was 4096 bytes (and thus remains unchanged), except on
2578 network file systems, where the buffer size was unpredictable and could be
2579 as large as several megabytes.
2581 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2582 for the Linux quota interface which predates kernel version 2.4.22 has
2585 * The malloc_get_state and malloc_set_state functions have been removed.
2586 Already-existing binaries that dynamically link to these functions will
2587 get a hidden implementation in which malloc_get_state is a stub. As far
2588 as we know, these functions are used only by GNU Emacs and this change
2589 will not adversely affect already-built Emacs executables. Any undumped
2590 Emacs executables, which normally exist only during an Emacs build, should
2591 be rebuilt by re-running “./configure; make” in the Emacs build tree.
2593 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
2594 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2595 “no-ip6-dotint” had already been the default, and support for the
2596 “ip6-dotint” option was removed from the Internet in 2006.
2598 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2599 flag from <resolv.h> have been removed. The option relied on a
2600 backwards-incompatible DNS extension which was never deployed on the
2603 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2604 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2605 They were already unimplemented.
2607 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2608 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2609 removed again from the IETF name lookup interface specification in RFC
2610 2553. Applications should use getaddrinfo instead.
2612 * DNSSEC-related declarations and definitions have been removed from the
2613 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2614 decode the data part of DNSSEC record types. Previous versions of glibc
2615 only implemented minimal support for the previous version of DNSSEC, which
2616 is incompatible with the currently deployed version.
2618 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2619 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2620 <arpa/nameser.h> header file because the distinction between RR types and
2621 meta-RR types is not officially standardized, subject to revision, and
2622 thus not suitable for encoding in a macro.
2624 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2625 and rhook members of the res_state type in <resolv.h> have been removed.
2626 The glibc stub resolver did not support these hooks, but the header file
2627 did not reflect that.
2629 * For multi-arch support it is recommended to use a GCC which has
2630 been built with support for GNU indirect functions. This ensures
2631 that correct debugging information is generated for functions
2632 selected by IFUNC resolvers. This support can either be enabled by
2633 configuring GCC with '--enable-gnu-indirect-function', or by
2634 enabling it by default by setting 'default_gnu_indirect_function'
2635 variable for a particular architecture in the GCC source file
2638 * GDB pretty printers have been added for mutex and condition variable
2639 structures in POSIX Threads. When installed and loaded in gdb these pretty
2640 printers show various pthread variables in human-readable form when read
2641 using the 'print' or 'display' commands in gdb.
2643 * Tunables feature added to allow tweaking of the runtime for an application
2644 program. This feature can be enabled with the '--enable-tunables' configure
2645 flag. The GNU C Library manual has details on usage and README.tunables has
2646 instructions on adding new tunables to the library.
2648 * A new version of condition variables functions have been implemented in
2649 the NPTL implementation of POSIX Threads to provide stronger ordering
2652 * A new version of pthread_rwlock functions have been implemented to use a more
2653 scalable algorithm primarily through not using a critical section anymore to
2656 Security related changes:
2658 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2659 have been created with makecontext could fail to terminate due to a
2660 missing .cantunwind annotation. This has been observed to lead to a hang
2661 (denial of service) in some Go applications compiled with gccgo. Reported
2662 by Andreas Schwab. (CVE-2016-6323)
2664 * The DNS stub resolver functions would crash due to a NULL pointer
2665 dereference when processing a query with a valid DNS question type which
2666 was used internally in the implementation. The stub resolver now uses a
2667 question type which is outside the range of valid question type values.
2670 The following bugs are resolved with this release:
2672 [4099] stdio: Overly agressive caching by stream i/o functions.
2673 [7065] build: Support building glibc with -fstack-protector or -fstack-
2675 [9842] localedata: en_CA: incorrect date format
2676 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2677 before it started waiting
2678 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2679 [15765] nptl: sem_open is wrongly a cancellation point
2680 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2681 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2683 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2684 library linked with pthread
2685 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2686 "FIXME: Ingo" issue)
2687 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2688 [17252] libc: getrandom and getentropy syscall
2689 [17730] malloc: thread-local storage is sometimes improperly free()'d
2690 after being __libc_memalign()'d
2691 [18241] stdio: failed fseek on memstream does not set errno and can fail
2693 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2695 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2696 PTHREAD_PRIO_INHERIT mutex on ARM
2697 [18784] network: res_query and related function crash for special record
2698 type queries (CVE-2015-5180)
2699 [19380] math: strtod does not raise "inexact"
2700 [19387] string: Integer overflow in memchr
2701 [19390] string: Integer overflow in strncat
2702 [19398] build: linknamespace tests fail with massively parallel build
2703 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2705 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2706 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2707 [19514] libc: [PATCH] Fix spelling errors in spelling
2708 "implement"/"implementation" in several places
2709 [19582] network: Deprecate RES_USE_INET6
2710 [19673] manual: clog10 docs appear to be erroneous
2711 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2712 causes a segmentation fault
2713 [19826] libc: invalid pointer returned from __tls_get_addr with static
2715 [20016] network: resolv: Remove hooks support from the API
2716 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2718 [20033] math: [x86_64] vectorized math function don't call the __finite
2720 [20116] nptl: use after free in pthread_create
2721 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2722 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2724 [20311] nptl: please install proc_service.h
2725 [20366] libc: Compilation errors in installed headers in strict-compliance
2727 [20370] malloc: malloc: Arena free list management is still racy
2728 (incorrect fix in bug 19243)
2729 [20386] libc: assert (X = 0) does not result in GCC warning
2730 [20432] malloc: malloc: Minimize interface required for interposition
2731 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2732 in _Unwind_Backtrace (CVE-2016-6323)
2733 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2734 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2736 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2737 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2738 [20477] network: resolv: incorrect double-checked locking related to
2740 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2742 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2744 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2745 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2746 cause transition penalty
2747 [20517] math: sparcv9 missing fdiml compat symbol
2748 [20524] manual: strverscmp is inconsistent
2749 [20525] libc: <sys/quota.h> should be based on kernel headers
2750 [20539] math: GCC 7 -static -lm fails to link at -O3
2751 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2753 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2755 [20591] network: Remove obsolete DNSSEC support
2756 [20592] network: DNS resource record type classification macros in
2757 <arpa/nameser.h> are incorrect
2758 [20593] network: Update DNS RR type definitions
2759 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2760 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2762 [20629] network: libresolv: Remove support for bitstring labels
2764 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2765 assertion: "maxidx >= 2"
2766 [20660] math: [arm] Use VSQRT
2767 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2768 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2769 [20689] libc: Test for FMA should also check for AVX.
2770 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2771 [20715] math: iszero macro breaks existing code
2772 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2773 [20728] libc: powerpc: Missing TOC stub in clone
2774 [20729] build: glibc-2.24 fails to build for i486 with -Os
2775 [20750] build: Build fails with default PIE enabled gcc-6.x
2776 [20768] math: [alpha] sqrt fegetenv namespace
2777 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2779 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2780 __FLT_EVAL_METHOD__ is 2
2781 [20790] network: rpcgen buffer overrun in get_prog_declaration
2782 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2783 [20829] libc: crypt snprintf namespace
2784 [20847] libc: tst-vfork3 failure
2785 [20855] math: Default bits/mathdef.h has inappropriate float_t
2786 [20859] math: [sh4] FP_ILOGB0 invalid
2787 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2788 U+20AC), not same as GBK
2789 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2790 [20916] math: pow handling of sNaN arguments
2791 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2792 [20919] math: Bad pow (qNaN, 0) result with -lieee
2793 [20940] math: hypot sNaN handling
2794 [20947] math: fmax, fmin sNaN handling
2795 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2796 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2798 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2799 [20973] nptl: robust mutexes: Lost wake-ups
2800 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2801 [20978] nis: strlen on null pointer in nss_nisplus
2802 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2804 [21014] string: i686 memchr overflows internal pointer check
2805 [21019] libc: [mips] n32 lseek incorrect on overflow
2806 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2807 [21026] libc: [MIPS] readahead syscall is broken on n64
2808 [21028] math: Fallback fesetexceptflag should always succeed
2809 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2810 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2812 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2813 [21061] librt: [microblaze] librt lost clock_* exports
2814 [21073] libc: tunables: insecure environment variables passed to
2815 subprocesses with AT_SECURE
2816 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2820 * The minimum Linux kernel version that this version of the GNU C Library
2821 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2822 kernel version 2.6.32 or later suffices (on architectures that already
2823 required kernel versions more recent than 3.2, those requirements remain
2824 unchanged). Linux 3.2 or later kernel headers are required on all
2827 * The pap_AN locale has been deleted. This has been deprecated for a long
2828 time. It has been replaced by pap_AW & pap_CW, both of which have long
2829 been included in previous releases.
2831 * The readdir_r and readdir64_r functions have been deprecated. It is
2832 recommended to use readdir and readdir64 instead.
2834 * The type “union wait” has been removed. It was deprecated in the early
2835 1990s and never part of POSIX. Application code should use the int type
2836 instead of “union wait”.
2838 * A new NSS action is added to facilitate large distributed system
2839 administration. The action, MERGE, allows remote user stores like LDAP
2840 to be merged into local user stores like /etc/groups in order to provide
2841 easy to use, updated, and managed sets of merged credentials. The new
2842 action can be used by configuring it in /etc/nsswitch.conf:
2843 group: files [SUCCESS=merge] nis
2844 Implemented by Stephen Gallagher (Red Hat).
2846 * The deprecated __malloc_initialize_hook variable has been removed from the
2849 * The long unused localedef --old-style option has been removed. It hasn't
2850 done anything in over 16 years. Scripts using this option can safely
2853 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2854 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2855 return the next representable value in the direction of positive infinity
2856 and the nextdown functions return the next representable value in the
2857 direction of negative infinity. These are currently enabled as GNU
2860 Security related changes:
2862 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2863 could result in a stack overflow when getnetbyname was called with an
2864 overly long name. (CVE-2016-3075)
2866 * Previously, getaddrinfo copied large amounts of address data to the stack,
2867 even after the fix for CVE-2013-4458 has been applied, potentially
2868 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2869 instead. Reported by Michael Petlan. (CVE-2016-3706)
2871 * The glob function suffered from a stack-based buffer overflow when it was
2872 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2873 Reported by Alexander Cherepanov. (CVE-2016-1234)
2875 * The Sun RPC UDP client could exhaust all available stack space when
2876 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2877 alloca plugin for GCC. (CVE-2016-4429)
2879 * The IPv6 name server management code in libresolv could result in a memory
2880 leak for each thread which is created, performs a failing naming lookup,
2881 and exits. Over time, this could result in a denial of service due to
2882 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2884 The following bugs are resolved with this release:
2886 [1170] localedata: ne_NP: update Nepali locale definition file
2887 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2889 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2890 [6796] math: fdim() does not set errno on overflow
2891 [10354] libc: posix_spawn should use vfork() in more cases than presently
2892 [11213] localedata: localedata: add copyright disclaimer to locale files
2893 [12143] localedata: chr_US: new Cherokee locale
2894 [12450] localedata: sgs_LT: new locale
2895 [12676] localedata: ln_CD: new locale
2896 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2898 [13304] math: fma, fmaf, fmal produce wrong results
2899 [14259] build: --localedir arg to configure is ignored
2900 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2901 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2902 [14934] localedata: es_CL: wrong first weekday chilean locale
2903 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2905 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2907 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2908 [15368] nptl: raise() is not async-signal-safe
2909 [15479] math: ceil, floor, round and trunc raise inexact exception
2910 [15578] localedata: kk_KZ: various updates
2911 [16003] localedata: pap_AN: punt old locale
2912 [16137] localedata: iw_IL: punt old locale
2913 [16190] localedata: eo: new esperanto locale
2914 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2915 [16742] malloc: race condition: pthread_atfork() called before first
2916 malloc() results in unexpected locking behaviour/deadlocks
2917 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2919 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2920 [17565] localedata: pt_PT: wrong (work-)week start
2921 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2922 [17950] build: Build fails with -msse
2923 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2924 [18433] libc: posix_spawn does not return correctly upon failure to
2926 [18453] localedata: charmaps/IBM875: incorrect codes
2927 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2929 [18896] localedata: he_IL: improvements for currency
2930 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2931 Romanian locale data
2932 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2934 [19056] libc: Deprecate readdir_r
2935 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2937 [19198] localedata: nl_NL: small improvements for Dutch locales
2938 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2939 nameservers (CVE-2016-5417)
2940 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2942 [19400] locale: Language missing in "iso-639.def", trivial fix in
2944 [19431] malloc: Deadlock between fflush, getdelim, and fork
2945 [19505] libc: Incorrect file descriptor validity checks in
2946 posix_spawn_file_actions_add{open,close,dup2}
2947 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2948 when using RTLD_NEXT
2949 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2950 `intl/{gettextP,loadinfo}.h'
2951 [19534] libc: execle, execlp may use malloc
2952 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2953 [19573] network: res_nclose and __res_maybe_init disagree about name
2954 server initialization, breaking Hesiod
2955 [19575] localedata: Status of GB18030 tables
2956 [19581] localedata: sr_* date_fmt string contains additional newline
2957 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2959 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2960 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2961 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2962 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2964 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2966 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2968 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2969 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2970 [19633] locale: strfmon_l applies global locale to number formatting
2971 [19642] network: Memory leak in getnameinfo
2972 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2973 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2975 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2976 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2978 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2979 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2981 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2983 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2985 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2986 pointers and lengths in error-case.
2987 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2988 report errors on UTF-16 surrogates values.
2989 [19755] nscd: nscd assertion failure in gc
2990 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2991 [19759] libc: mempcpy shouldn't be inlined
2992 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2993 [19765] libc: s390 needs an optimized mempcpy
2994 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2995 NAME_MAX limit assumption (CVE-2016-1234)
2996 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2997 [19787] network: Missing and incorrect truncation checks in getnameinfo
2998 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
3000 [19791] network: Assertion failure in res_query.c with un-connectable name
3002 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
3003 [19822] math: libm.so install clobbers old version
3004 [19825] network: resolv: send_vc can return uninitialized data in second
3005 response to getaddrinfo
3006 [19830] network: nss_dns: should check RDATA length against buffer length
3007 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
3008 confronted with A/AAAA records of invalid size
3009 [19837] nss: nss_db: No retries for some long lines with a larger buffer
3010 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
3011 [19853] stdio: Printing IBM long double in decimal with high precision is
3013 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
3014 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
3015 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
3017 [19865] network: Assertion failure or memory leak in
3018 _nss_dns_getcanonname_r
3019 [19868] network: nss_dns: netent code does not skip over non-PTR records
3020 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
3022 [19881] string: Improve x86-64 memset
3023 [19907] string: Incorrect memcpy tests
3024 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
3026 [19925] libc: termios.h XCASE namespace
3027 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
3028 [19929] libc: limits.h NL_NMAX namespace
3029 [19931] stdio: Memory leak in vfprintf
3030 [19957] libc: clone(CLONE_VM) access invalid parent memory
3031 [19963] localedata: en_IL: New locale
3032 [19989] stdio: stdio.h cuserid namespace
3033 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
3035 [19996] locale: langinfo.h nl_langinfo_l namespace
3036 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
3037 [20010] network: getaddrinfo: Stack overflow in hostent translation
3039 [20012] stdio: libio: fmemopen append mode failure
3040 [20014] stdio: stdio.h namespace for pre-threads POSIX
3041 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
3042 [20023] libc: fcntl.h timespec namespace
3043 [20024] math: [x86_64] vectorized sincos trashes the stack
3044 [20031] network: nss_hesiod: Heap overflow in get_txt_records
3045 [20041] time: sys/time.h timespec namespace
3046 [20043] libc: unistd.h missing cuserid for UNIX98 and before
3047 [20044] libc: unistd.h missing pthread_atfork for UNIX98
3048 [20051] libc: ttyslot in wrong header under wrong conditions
3049 [20054] libc: gethostname not declared for XPG4
3050 [20055] libc: termios.h missing tcgetsid for XPG4
3051 [20072] dynamic-link: x86 init_cpu_features is called twice in static
3053 [20073] libc: sys/stat.h fchmod namespace
3054 [20074] libc: stdlib.h rand_r namespace
3055 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
3056 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
3058 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
3059 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
3061 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
3062 [20119] libc: Wrong mask for processors level type from CPUID
3063 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
3064 AS not supporting AVX512
3065 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
3067 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
3068 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
3070 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
3071 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
3072 [20178] libc: posix_spawn{p} should not call exit
3073 [20191] stdio: libio: vtables hardening
3074 [20195] string: FMA4 detection requires CPUID execution with register
3076 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
3077 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
3079 [20212] math: acos (sNaN) returns sNaN
3080 [20213] math: asin (sNaN) returns sNaN
3081 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
3082 [20218] math: [i386] asinhl (sNaN) returns sNaN
3083 [20219] math: [i386] atanhl (sNaN) returns sNaN
3084 [20222] stdio: fopencookie: Mangle function pointers
3085 [20224] math: [i386] cbrtl (sNaN) returns sNaN
3086 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
3087 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
3089 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
3090 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
3091 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
3092 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
3093 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
3094 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
3095 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
3096 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
3097 [20240] math: modf (sNaN) returns sNaN
3098 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
3099 [20250] math: frexp (sNaN) returns sNaN
3100 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
3101 [20255] math: [i386] fdim, fdimf return with excess range and precision /
3103 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
3104 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
3105 subscript is below array bounds [-Werror=array-bounds]
3106 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
3107 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
3109 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
3110 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
3112 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
3113 "invalid" exceptions
3114 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
3115 [20316] localedata: id_ID: Februari instead of Pebruari
3116 [20327] string: POWER8 strcasecmp returns incorrect result
3117 [20347] math: Failure: Test: j0_downward (0xap+0)
3118 [20348] libc: FAIL: misc/tst-preadvwritev64
3119 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
3120 [20350] libc: There is no test for p{read,write}64
3121 [20357] math: Incorrect cos result for 1.5174239687223976
3122 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
3126 * Unicode 8.0.0 Support: Character encoding, character type info, and
3127 transliteration tables are all updated to Unicode 8.0.0, using new
3128 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
3129 These updates cause user visible changes, such as the fixes for bugs
3130 89, 16061, and 18568.
3132 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
3133 kernel-internal CPU set size. This means that requests that change the
3134 CPU affinity which failed before (for example, an all-ones CPU mask) will
3135 now succeed. Applications that need to determine the effective CPU
3136 affinities need to call sched_getaffinity or pthread_getaffinity_np after
3137 setting it because the kernel can adjust it (and the previous size check
3138 would not detect this in the majority of cases).
3140 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
3141 the following new symbols are used: fts64_children, fts64_close,
3142 fts64_open, fts64_read and fts64_set.
3144 * getaddrinfo now detects certain invalid responses on an internal netlink
3145 socket. If such responses are received, an affected process will
3146 terminate with an error message of "Unexpected error <number> on netlink
3147 descriptor <number>" or "Unexpected netlink response of size <number> on
3148 descriptor <number>". The most likely cause for these errors is a
3149 multi-threaded application which erroneously closes and reuses the netlink
3150 file descriptor while it is used by getaddrinfo.
3152 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
3153 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
3154 unnecessary serialization of memory allocation requests across threads.
3155 The defect is now corrected. Users should see a substantial increase in
3156 the concurent throughput of allocation requests for applications which
3157 trigger this bug. Affected applications typically create and
3158 destroy threads frequently. (Bug 19048 was reported and analyzed by
3161 * There is now a --disable-timezone-tools configure option for disabling the
3162 building and installing of the timezone related utilities (zic, zdump, and
3163 tzselect). This is useful for people who build the timezone data and code
3164 independent of the GNU C Library.
3166 * The obsolete header <regexp.h> has been removed. Programs that require
3167 this header must be updated to use <regex.h> instead.
3169 * The obsolete functions bdflush, create_module, get_kernel_syms,
3170 query_module and uselib are no longer available to newly linked binaries;
3171 the header <sys/kdaemon.h> has been removed. These functions and header
3172 were specific to systems using the Linux kernel and could not usefully be
3173 used with the GNU C Library on systems with version 2.6 or later of the
3176 * Optimized string, wcsmbs and memory functions for IBM z13.
3177 Implemented by Stefan Liebler.
3179 * Newly linked programs that define a variable called signgam will no longer
3180 have it set by the lgamma, lgammaf and lgammal functions. Programs that
3181 require signgam to be set by those functions must ensure that they use the
3182 variable provided by the GNU C Library and declared in <math.h>, without
3183 defining their own copy.
3185 * The minimum GCC version that can be used to build this version of the GNU
3186 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
3187 still be used to compile programs using the GNU C Library.
3189 Security related changes:
3191 * An out-of-bounds value in a broken-out struct tm argument to strftime no
3192 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
3194 * The LD_POINTER_GUARD environment variable can no longer be used to disable
3195 the pointer guard feature. It is always enabled. Previously,
3196 LD_POINTER_GUARD could be used to disable security hardening in binaries
3197 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
3200 * An integer overflow in hcreate and hcreate_r could lead to an
3201 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
3203 * The catopen function no longer has unbounded stack usage. Reported by
3204 Max. (CVE-2015-8779)
3206 * The nan, nanf and nanl functions no longer have unbounded stack usage
3207 depending on the length of the string passed as an argument to the
3208 functions. Reported by Joseph Myers. (CVE-2014-9761)
3210 * A stack-based buffer overflow was found in libresolv when invoked from
3211 libnss_dns, allowing specially crafted DNS responses to seize control
3212 of execution flow in the DNS client. The buffer overflow occurs in
3213 the functions send_dg (send datagram) and send_vc (send TCP) for the
3214 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
3215 family. The use of AF_UNSPEC triggers the low-level resolver code to
3216 send out two parallel queries for A and AAAA. A mismanagement of the
3217 buffers used for those queries could result in the response of a query
3218 writing beyond the alloca allocated buffer created by
3219 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
3220 the overflow. Thanks to the Google Security Team and Red Hat for
3221 reporting the security impact of this issue, and Robert Holiday of
3222 Ciena for reporting the related bug 18665. (CVE-2015-7547)
3224 The following bugs are resolved with this release:
3226 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
3227 [887] math: Math library function "logb" and "nextafter" inconsistent
3228 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
3229 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
3230 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
3231 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
3233 [4404] localedata: German translation of "Alarm clock" is misleading
3234 [6799] math: nextafter() and nexttoward() doen't set errno on
3235 overflow/underflow errors
3236 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3238 [10432] nis: _nss_nis_setnetgrent assertion failure
3239 [11460] libc: fts has no LFS support
3240 [12926] network: getaddrinfo()/make_request() may spin forever
3241 [13065] nptl: Race condition in pthread barriers
3242 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3243 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3245 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3246 [14912] libc: Rename non-installed bits/*.h headers
3247 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3248 [15367] math: Let gcc use __builtin_isinf
3249 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3250 [15421] math: lgamma wrongly sets signgam for ISO C
3251 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3252 FE_INVALID with argument out of range
3253 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3255 [15786] dynamic-link: ifunc resolver functions can smash function
3257 [15918] math: Unnecessary check for equality in hypotf()
3258 [16061] localedata: Review / update transliteration data
3259 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3261 [16141] time: strptime %z offset restriction
3262 [16171] math: drem should be alias of remainder
3263 [16296] math: fegetround is pure?
3264 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3265 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3267 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3268 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3270 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3271 "Exception "Inexact" set" on ppc32
3272 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3273 [16517] math: Missing underflow exception from tanf/tan/tanl
3274 [16519] math: Missing underflow exception from sinhf
3275 [16520] math: Missing underflow exception from tanhf
3276 [16521] math: Missing underflow exception from exp2
3277 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3279 [16734] stdio: fopen calls mmap to allocate its buffer
3280 [16961] math: nan function incorrect handling of bad sequences
3281 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3282 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3283 [16985] locale: localedef: confusing error message when opening output
3285 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3286 [17197] locale: Redundant shift character in iconv conversion output at
3288 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3289 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3290 [17250] dynamic-link: static linking breaks nss loading
3291 (getaddrinfo/getpwnam/etc...)
3292 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3294 [17441] math: isnan() should use __builtin_isnan() in GCC
3295 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3296 (related to lock elision)
3297 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3298 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3299 [17887] time: strptime should be able to parse "+01:00" style timezones
3300 [17905] libc: catopen() Multiple unbounded stack allocations
3302 [18084] libc: backtrace (..., 0) dumps core on x86
3303 [18086] libc: nice() sets errno to 0 on success
3304 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3305 is too large (CVE-2015-8778)
3306 [18251] dynamic-link: SONAME missing when audit modules provides path
3307 [18265] libc: add attributes for wchar string and memory functions
3308 [18370] math: csqrt missing underflows
3309 [18421] libc: [hppa] read-only segment has dynamic relocations
3310 [18472] libc: Obsolete syscall wrappers should be compat symbols
3311 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3312 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3313 [18525] localedata: Remove locale timezone information
3314 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3315 [18568] localedata: Update locale data to Unicode 8.0
3316 [18589] locale: sort-test.sh fails at random
3317 [18595] math: ctan, ctanh missing underflows
3318 [18604] libc: assert macro-expands its argument
3319 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3320 contains a vector instruction exception.
3321 [18611] math: j1, jn missing errno setting on underflow
3322 [18618] localedata: sync Chechen locale definitions with other *_RU
3324 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3325 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3326 [18665] network: In send_dg, the recvfrom function is NOT always using the
3327 buffer size of a newly created buffer (CVE-2015-7547)
3328 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3330 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3332 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3333 [18699] math: tilegx cproj() for various complex infinities does not yield
3335 [18724] libc: Harden put*ent functions against data injection
3336 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3337 [18755] build: build errors with -DNDEBUG
3338 [18757] stdio: fmemopen fails to set errno on failure
3339 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3341 [18781] libc: openat64 lacks O_LARGEFILE
3342 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3343 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3344 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3345 [18790] math: [ldbl-128ibm] tanhl inaccurate
3346 [18795] libc: stpncpy fortification misses buffer lengths that are
3347 statically too large
3348 [18796] build: build fails for --disable-mathvec
3349 [18803] math: hypot missing underflows
3350 [18820] stdio: fmemopen may leak memory on failure
3351 [18823] math: csqrt spurious underflows
3352 [18824] math: fma spurious underflows
3353 [18825] math: pow missing underflows
3354 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3355 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3356 [18870] build: sem_open.c fails to compile with missing symbol
3358 [18872] stdio: Fix memory leak in printf_positional
3359 [18873] libc: posix_fallocate overflow check ineffective
3360 [18875] math: Excess precision leads incorrect libm
3361 [18877] libc: arm: mmap offset regression
3362 [18887] libc: memory corruption when using getmntent on blank lines
3363 [18918] localedata: hu_HU: change time to HH:MM:SS format
3364 [18921] libc: Regression: extraneous stat() and fstat() performed by
3366 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3367 binaries (CVE-2015-8777)
3368 [18951] math: tgamma missing underflows
3369 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3371 [18953] localedata: lt_LT: change currency symbol to the euro
3372 [18956] math: powf inaccuracy
3373 [18961] math: [i386] exp missing underflows
3374 [18966] math: [i386] exp10 missing underflows
3375 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3376 [18969] build: multiple string test failures due to missing locale
3378 [18970] libc: Reference of pthread_setcancelstate in libc.a
3379 [18977] math: float / long double Bessel functions not in XSI POSIX
3380 [18980] math: i386 libm functions return with excess range and precision
3381 [18981] math: i386 scalb*, ldexp return with excess range and precision
3382 [18982] stdio: va_list and vprintf
3383 [18985] time: Passing out of range data to strftime() causes a segfault
3385 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3386 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3387 [19012] locale: iconv_open leaks memory on error path
3388 [19016] math: clog, clog10 inaccuracy
3389 [19018] nptl: Mangle function pointers in tls_dtor_list
3390 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3391 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3392 [19048] malloc: malloc: arena free list can become cyclic, increasing
3394 [19049] math: [powerpc] erfc incorrect zero sign
3395 [19050] math: [powerpc] log* incorrect zero sign
3396 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3397 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3398 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3399 [19074] network: Data race in _res_hconf_reorder_addrs
3400 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3401 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3402 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3404 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3406 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3407 [19086] manual: posix_fallocate64 documented argument order is wrong.
3408 [19088] math: lround, llround missing exceptions close to overflow
3410 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3411 [19095] math: dbl-64 lrint incorrect for 64-bit long
3412 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3413 [19124] dynamic-link: ld.so failed to build with older assmebler
3414 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3415 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3416 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3417 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3418 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3419 pthread_setaffinity_np
3420 [19156] math: [ldbl-128] j0l spurious underflows
3421 [19164] nptl: tst-getcpu fails with many possible CPUs
3422 [19168] math: math/test-ildoubl and math/test-ldouble failure
3423 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3424 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3426 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3427 (FE_NOMASK_ENV) do not clear SSE exceptions
3428 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3429 _int_new_arena/reused_arena
3430 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3431 [19201] math: dbl-64 remainder incorrect sign of zero result
3432 [19205] math: bits/math-finite.h conditions do not match math.h and
3434 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3435 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3436 for C99-based standards
3437 [19212] libc: features.h not -Wundef clean
3438 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3440 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3441 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3442 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3444 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3445 "inexact" exceptions
3446 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3448 [19242] libc: strtol incorrect in Turkish locales
3449 [19243] malloc: reused_arena can pick an arena on the free list, leading
3450 to an assertion failure and reference count corruption
3451 [19253] time: tzset() ineffective when temporary TZ did not include DST
3453 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3454 [19270] math: [hppa] Shared libm missing __isnanl
3455 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3456 MAP_HUGETLB and MAP_STACK defines
3457 [19313] nptl: Wrong __cpu_mask for x32
3458 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3459 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3460 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3461 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3462 [19363] time: x32: times() return value wrongly truncates/sign extends
3464 [19367] dynamic-link: Improve branch prediction on Silvermont
3465 [19369] network: Default domain name not reset by res_ninit when "search"
3466 / "domain" entry is removed from resolv.conf
3467 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3469 [19385] localedata: bg_BG: time separator should be colon, not comma
3470 [19408] libc: linux personality syscall wrapper may erroneously return an
3471 error on 32-bit architectures
3472 [19415] libc: dladdr returns wrong names on hppa
3473 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3474 IBM905, IBM907, and IBM909
3475 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3476 [19443] build: build failures with -DDEBUG
3477 [19451] build: Make check fails on test-double-vlen2
3478 [19462] libc: Glibc failed to build with -Os
3479 [19465] math: Wrong code with -Os
3480 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3482 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3484 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3485 [19486] math: S390: Math tests fail with "Exception Inexact set".
3486 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3487 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3489 [19590] math: Fail to build shared objects that use libmvec.so functions.
3493 * The following bugs are resolved with this release:
3495 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3496 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3497 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3498 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3499 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3500 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3501 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3502 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3503 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3504 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3505 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3506 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3507 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3508 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3509 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3510 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3511 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3512 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3513 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3514 18657, 18676, 18694, 18696, 18887.
3516 * Cache information can be queried via sysconf() function on s390 e.g. with
3517 _SC_LEVEL1_ICACHE_SIZE as argument.
3519 * A buffer overflow in gethostbyname_r and related functions performing DNS
3520 requests has been fixed. If the NSS functions were called with a
3521 misaligned buffer, the buffer length change due to pointer alignment was
3522 not taken into account. This could result in application crashes or,
3523 potentially arbitrary code execution, using crafted, but syntactically
3524 valid DNS responses. (CVE-2015-1781)
3526 * The time zone file parser has been made more robust against crafted time
3527 zone files, avoiding heap buffer overflows related to the processing of
3528 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3529 large time zone data files. Overly long time zone specifiers in the TZ
3530 variable no longer result in stack overflows and crashes.
3532 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3533 for LD and GD on x86 and x86-64, has been implemented. You will need
3534 binutils-2.24 or later to enable this optimization.
3536 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3537 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3538 Hat). These updates cause user visible changes, such as the fix for bug
3541 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3542 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3543 condition in some applications.
3545 * Added vector math library named libmvec with the following vectorized x86_64
3546 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3548 The library can be disabled with --disable-mathvec. Use of the functions is
3549 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3550 Shared library libmvec.so is linked in as needed when using -lm (no need to
3551 specify -lmvec explicitly for not static builds).
3552 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3554 * A new fmemopen implementation has been added with the goal of POSIX
3555 compliance. The new implementation fixes the following long-standing
3556 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3557 old implementation is still present for use be by existing binaries.
3559 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3560 releases. It has been fixed to match 2.19 and older, but binaries built
3561 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3563 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3564 Contributed by Roland McGrath (Google).
3566 * The header <regexp.h> is deprecated, and will be removed in a future
3567 release. Use of this header will trigger a deprecation warning.
3568 Application developers should update their code to use <regex.h> instead.
3570 This header was formerly part of SUS, but was deprecated in 1994 and
3571 removed from the standard in 2001. Also, the glibc implementation
3572 leaks memory. See BZ#18681 for more details.
3576 * The following bugs are resolved with this release:
3578 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3579 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3580 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3581 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3582 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3583 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3584 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3585 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3586 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3587 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3590 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3591 too little memory for the to-be-scanned arguments and overflow the
3592 allocated buffer. The implementation now correctly computes the required
3593 buffer size when using malloc, and switches to malloc from alloca as
3596 * A new semaphore algorithm has been implemented in generic C code for all
3597 machines. Previous custom assembly implementations of semaphore were
3598 difficult to reason about or ensure that they were safe. The new version
3599 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3600 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3601 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3603 * Port to Altera Nios II has been contributed by Mentor Graphics.
3605 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3606 implementations for powerpc64/powerpc64le.
3607 Implemented by Adhemerval Zanella (IBM).
3609 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3610 and powerpc64le. This may improve lock scaling of existing programs on
3611 HTM capable systems. The lock elision code is only enabled with
3612 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3613 powerpc will issue a transaction abort on every syscall to avoid side
3614 effects being visible outside transactions.
3616 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3617 AArch64. Contributed by ARM Ltd.
3619 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3621 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3622 under certain input conditions resulting in the execution of a shell for
3623 command substitution when the application did not request it. The
3624 implementation now checks WRDE_NOCMD immediately before executing the
3625 shell and returns the error WRDE_CMDSUB as expected.
3627 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3628 processing format strings with a large number of format specifiers.
3630 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3631 infinite loop if the DNS response contained a PTR record of an unexpected
3634 * The minimum GCC version that can be used to build this version of the GNU
3635 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3636 still be used to compile programs using the GNU C Library.
3638 * The GNU C Library is now built with -Werror by default. This can be
3639 disabled by configuring with --disable-werror.
3641 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3643 * The obsolete sigvec function has been removed. This was the original
3644 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3645 programs have been using instead for about 25 years. Of course, ABI
3646 compatibility for old binaries using sigvec remains intact.
3648 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3649 with newer versions of bison.
3651 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3652 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3653 registers overlay two consecutive single-precision registers. MIPS32R2
3654 introduced a new FPU mode (FR=1) where double-precision registers extend the
3655 corresponding single-precision registers which is incompatible with the
3656 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3657 require the use of FR=1 making a transition necessary. New o32 ABI
3658 extensions enable users to migrate over time from the original o32 ABI
3659 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3660 tracks the ABI of any loaded object and verifies that new objects are
3661 compatible. Mode transitions will also be requested as required and
3662 unsupportable objects will be rejected. The ABI checks include both soft and
3663 hard float ABIs for o32, n32 and n64.
3665 GCC 5 with GNU binutils 2.25 onwards:
3666 It is strongly recommended that all o32 system libraries are built using the
3667 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3668 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3669 compiler using --with-fp-32=xx to set this by default.
3673 * The following bugs are resolved with this release:
3675 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3676 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3677 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3678 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3679 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3680 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3681 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3682 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3683 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3684 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3685 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3686 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3687 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3688 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3689 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3691 * Reverted change of ABI data structures for s390 and s390x:
3692 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3693 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3694 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3695 are preserved pointing straight to the same implementation as the old ones.
3696 Given that, new callers will simply provide a too-big buffer to these
3697 functions. Any applications/libraries out there that embed jmp_buf or
3698 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3699 against 2.19 headers will have to rebuilt again. This is necessary in any
3700 case to revert the breakage in their ABI caused by the glibc change.
3702 * Support for file description locks is added to systems running the
3703 Linux kernel. The standard file locking interfaces are extended to
3704 operate on file descriptions, not file descriptors, via the use of
3705 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3706 are associated with an open file instead of a process.
3708 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3710 * The minimum Linux kernel version that this version of the GNU C Library
3711 can be used with is 2.6.32.
3713 * Running the testsuite no longer terminates as soon as a test fails.
3714 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3715 with PASS or FAIL lines for individual tests. A summary of the results is
3716 printed, including a list of failing lists, and "make check" exits with
3717 error status if there were any unexpected failures. "make check
3718 stop-on-test-failure=y" may be used to keep the old behavior.
3720 * The am33 port, which had not worked for several years, has been removed
3723 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3724 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3725 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3726 conflicted with POSIX (support for which was removed in 2.19), the
3727 interfaces those macros enabled remain available when compiling with
3728 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3729 test macros defined.
3731 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3733 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3734 This may improve lock scaling of existing programs on TX capable systems.
3735 The lock elision code is only built with --enable-lock-elision=yes and
3736 then requires a GCC version supporting the TX builtins. With lock elision
3737 default mutexes are elided via __builtin_tbegin, if the cpu supports
3738 transactions. By default lock elision is not enabled and the elision code
3741 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3742 copy the path argument. This allowed programs to cause posix_spawn to
3743 deference a dangling pointer, or use an unexpected pathname argument if
3744 the string was modified after the posix_spawn_file_actions_addopen
3747 * All supported architectures now use the main glibc sysdeps directory
3748 instead of some being in a separate "ports" directory (which was
3749 distributed separately before glibc 2.17).
3751 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3752 On configurations that support it (all Linux configurations), it's now
3753 used regardless of the --enable-add-ons switch to configure. It is no
3754 longer possible to build such configurations without pthreads support.
3756 * Locale names, including those obtained from environment variables (LANG
3757 and the LC_* variables), are more tightly checked for proper syntax.
3758 setlocale will now fail (with EINVAL) for locale names that are overly
3759 long, contain slashes without starting with a slash, or contain ".." path
3760 components. (CVE-2014-0475) Previously, some valid locale names were
3761 silently replaced with the "C" locale when running in AT_SECURE mode
3762 (e.g., in a SUID program). This is no longer necessary because of the
3765 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3766 with application code using Intel MPX instructions. (With all previous
3767 versions, the MPX register state could be clobbered when making calls
3768 into or out of a shared library.) Note that while the new dynamic
3769 linker is compatible with all known x86 hardware whether or not it
3770 supports Intel MPX, some x86 instruction-set emulators might fail to
3771 handle the new instruction encodings. This is known to affect Valgrind
3772 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3773 release), and might affect other tools that do instruction emulation.
3775 * Support for loadable gconv transliteration modules has been removed.
3776 The support for transliteration modules has been non-functional for
3777 over a decade, and the removal is prompted by security defects. The
3778 normal gconv conversion modules are still supported. Transliteration
3779 with //TRANSLIT is still possible, and the //IGNORE specifier
3780 continues to be supported. (CVE-2014-5119)
3782 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3783 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3784 resulting a denial-of-service security vulnerability in applications which
3785 use functions related to iconv. (CVE-2014-6040)
3789 * The following bugs are resolved with this release:
3791 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3792 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3793 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3794 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3795 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3796 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3797 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3798 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3799 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3800 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3801 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3802 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3803 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3804 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3805 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3806 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3807 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3808 16431, 16453, 16474, 16506, 16510, 16529
3810 * Slovenian translations for glibc messages have been contributed by the
3811 Translation Project's Slovenian team of translators.
3813 * The public headers no longer use __unused nor __block. This change is to
3814 support compiling programs that are derived from BSD sources and use
3815 __unused internally, and to support compiling with Clang's -fblock
3816 extension which uses __block.
3818 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3819 large collation sequences to optimize multiple passes. This cache
3820 computation may overflow for large collation sequences and may cause a
3821 stack or buffer overflow. This is now fixed to use a slower algorithm
3822 which does not use a cache if there is an integer overflow.
3824 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3825 rules for large collation sequences to optimize multiple passes and falls
3826 back to alloca if malloc fails, resulting in a possible stack overflow.
3827 The implementation now falls back to an uncached collation sequence lookup
3830 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3831 initialized for static applications resulting in the security feature
3832 being disabled. The pointer guard is now correctly initialized to a
3833 random value for static applications. Existing static applications need
3834 to be recompiled to take advantage of the fix (bug 15754).
3836 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3837 to the d_name member of struct dirent, or omit the terminating NUL
3838 character. (Bugzilla #14699).
3840 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3841 aligned_alloc functions could allocate too few bytes or corrupt the
3842 heap when passed very large allocation size values (Bugzilla #15855,
3845 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3846 for AF_INET6 has been fixed (Bugzilla #16072).
3848 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3849 pap_CW, quz_PE, the_NP.
3851 * Substantially revised locales: gd_GB, ht_HT
3853 * The LC_ADDRESS field was updated to support country_car for almost all
3856 * ISO 1427 definitions were updated.
3858 * ISO 3166 definitions were updated.
3860 * The localedef utility now supports --big-endian and --little-endian
3861 command-line options to generate locales for a different system from that
3862 for which the C library was built.
3864 * Binary locale files now only depend on the endianness of the system for
3865 which they are generated and not on other properties of that system. As a
3866 consequence, binary files generated with new localedef may be incompatible
3867 with old versions of the GNU C Library, and binary files generated with
3868 old localedef may be incompatible with this version of the GNU C Library,
3869 in the following circumstances:
3871 + Locale files may be incompatible on m68k systems.
3873 + Locale archive files (but not separate files for individual locales) may
3874 be incompatible on systems where plain "char" is signed.
3876 * The configure option --disable-versioning has been removed. Builds with
3877 --disable-versioning had not worked for several years.
3879 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3880 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3882 * SystemTap probes for malloc have been introduced.
3884 * SystemTap probes for slow multiple precision fallback paths of
3885 transcendental functions have been introduced.
3887 * Support for powerpc64le has been added.
3889 * The soft-float powerpc port now supports e500 processors.
3891 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3893 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3894 set of header declarations that are enabled by default, even when other
3895 feature test macros or compiler options such as -std=c99 would otherwise
3896 disable some of those declarations.
3898 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3899 conflict with POSIX. The libbsd-compat library (which was a dummy library
3900 that did nothing) has also been removed.
3902 * Preliminary documentation about Multi-Thread, Async-Signal and
3903 Async-Cancel Safety has been added.
3905 * Change of ABI data structures for s390 and s390x:
3906 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3907 allow for future hardware extensions. All library functions that accept or
3908 return these structures were versioned in order to provide backwards
3909 compatibility with existing code. However, not all cases can be handled
3910 with interface versioning. If an application embeds either structure into
3911 another structure and that structure is passed to another compilation unit
3912 which expects the newer larger-sized object then any access to the new
3913 fields will result in undefined behaviour. Similarly any access to fields
3914 that were moved by the enlarging of the structures will cause undefined
3915 behaviour. To fix the undefined behaviour all objects that are part of the
3916 final in-memory image must agree on the size of structures, and this may
3917 require recompilation.
3921 * The following bugs are resolved with this release:
3923 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3924 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3925 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3926 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3927 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3928 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3929 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3930 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3931 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3932 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3933 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3934 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3935 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3938 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3939 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3940 Distributions can re-enable building and using pt_chown via the new configure
3941 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3942 considerable security risks and should only be used if the distribution
3943 understands and accepts the risks.
3945 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3948 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3949 fixed (Bugzilla #15330).
3951 * Add support for calling C++11 thread_local object destructors on thread
3952 and program exit. This needs compiler support for offloading C++11
3953 destructor calls to glibc.
3955 * Improved worst case performance of libm functions with double inputs and
3958 * Support for priority inherited mutexes in pthread condition variables on
3959 non-x86 architectures.
3961 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3963 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3965 * Optimized string functions for ARM. Implemented by Will Newton and
3968 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3970 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3973 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3974 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3976 * Added a benchmark framework to track performance of functions in glibc.
3978 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3979 It is based on draft TS 18661 and currently enabled as a GNU extension.
3981 * On Linux, the clock function now uses the clock_gettime system call
3982 for improved precision, rather than old times system call.
3984 * Added support for version-3 tz format files. This is needed when using
3985 the tz database release 2013e or later, and affects a few unusual cases --
3986 currently only TZ='America/Godthab' for time stamps after 2037.
3988 * Added new API functions pthread_getattr_default_np and
3989 pthread_setattr_default_np to get and set the default pthread
3990 attributes of a process.
3992 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3993 This may improve lock scaling of existing programs on TSX capable systems.
3994 When the --enable-lock-elision=yes parameter is specified at configure
3995 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3998 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3999 availability). Implemented by Ryan S. Arnold.
4001 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
4005 * The following bugs are resolved with this release:
4007 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
4008 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
4009 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
4010 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
4011 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
4012 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
4013 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
4014 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
4015 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
4016 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
4017 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
4018 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
4019 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
4020 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
4021 14879, 14889, 14893, 14898, 14914.
4023 * Optimization of memcpy for MIPS.
4025 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
4026 EMFILE has been fixed (Bugzilla #14889).
4028 * The add-on ports collection is now distributed in the "ports" subdirectory
4029 of the main GNU C Library distribution, rather than separately.
4031 * Port to ARM AArch64 contributed by Linaro.
4033 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
4034 Optimized versions of memcpy, memset, and memcmp added for System z10 and
4036 Implemented by Andreas Krebbel.
4038 * The new function secure_getenv allows secure access to the environment,
4039 returning NULL if running in a SUID/SGID process. This function replaces
4040 the internal function __secure_getenv.
4042 * SystemTap static probes have been added into the dynamic linker.
4043 Implemented by Gary Benson.
4045 * Optimizations of string functions strstr, strcasestr and memmem.
4046 Implemented by Maxim Kuvyrkov.
4048 * The minimum Linux kernel version that this version of the GNU C Library
4049 can be used with is 2.6.16.
4051 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
4052 powerpc POWER7. Implemented by Will Schmidt.
4054 * New configure option --disable-nscd builds the C library such that it
4055 never attempts to contact the Name Service Caching Daemon (nscd).
4056 New configure option --disable-build-nscd avoids building nscd itself;
4057 this is the default if --disable-nscd is used.
4059 * Improved support for cross-compilation, including cross-testing and
4060 bootstrap builds without a previously built glibc.
4062 * Several testsuite tests are now able to test multiple IFUNC variants of an
4063 interface, rather than just testing the one that would be chooen by
4066 * New configure options --with-bugurl and --with-pkgversion, for
4067 distributors to use to embed their bug-reporting and package version
4068 information in --help and --version output.
4070 * The ttyname and ttyname_r functions on Linux now fall back to searching for
4071 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
4072 allows creation of chroots without the procfs mounted on /proc.
4074 * The `crypt' function now fails if passed salt bytes that violate the
4075 specification for those values. On Linux, the `crypt' function will
4076 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
4077 enabled, and fail on encrypted strings using the MD5 or DES algorithm
4078 when the mode is enabled.
4080 * The `clock_*' suite of functions (declared in <time.h>) is now available
4081 directly in the main C library. Previously it was necessary to link with
4082 -lrt to use these functions. This change has the effect that a
4083 single-threaded program that uses a function such as `clock_gettime' (and
4084 is not linked with -lrt) will no longer implicitly load the pthreads
4085 library at runtime and so will not suffer the overheads associated with
4086 multi-thread support in other code such as the C++ runtime library.
4088 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
4093 * The following bugs are resolved with this release:
4095 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
4096 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
4097 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
4098 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
4099 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
4100 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
4101 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
4102 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
4103 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
4104 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
4105 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
4106 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
4107 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
4108 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
4109 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
4110 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
4111 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
4112 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
4113 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
4114 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
4115 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
4116 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
4119 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
4120 configuring glibc with:
4121 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
4122 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
4123 Implemented by H.J. Lu.
4127 + define static_assert
4129 + do not declare gets
4131 + declare at_quick_exit and quick_exit also for ISO C11
4133 + aligned_alloc. NB: The code is deliberately allows the size parameter
4134 to not be a multiple of the alignment. This is a moronic requirement
4135 in the standard but it is only a requirement on the caller, not the
4138 + timespec_get added
4140 + uchar.h support added
4142 + CMPLX, CMPLXF, CMPLXL added
4144 Implemented by Ulrich Drepper.
4146 * Support for the IA-64 has been moved to ports.
4148 * Remove support for anything but ELF binary format
4150 * Checking versions of poll, ppoll added.
4151 Implemented by Ulrich Drepper.
4153 * More generic and 64-bit performance optimizations to math functions.
4154 Implemented by Ulrich Drepper.
4156 * New configure option --enable-obsolete-rpc makes the deprecated RPC
4157 headers and functions available at compile time as they were before
4158 version 2.14. This option will be removed at some time in the future
4159 after the TI-RPC library becomes fully sufficient for the needs of
4160 existing applications.
4162 * Compatibility code for Linux kernel versions before 2.4 has been removed.
4163 Note that glibc is not expected to work with any Linux kernel version
4166 * New header <sys/auxv.h> and function getauxval allowing easy access to
4167 the AT_* key-value pairs passed from the Linux kernel. The header also
4168 defines the HWCAP_* bits associated with the AT_HWCAP key.
4170 * New locales: mag_IN
4172 * New configure option --enable-systemtap builds SystemTap static probes
4173 into libc for setjmp and longjmp and into libpthread for various operations.
4174 So far the setjmp/longjmp probes and some of the libpthread probes are
4175 provided only for i*86 and x86_64.
4176 Implemented by Roland McGrath and Rayson Ho.
4178 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
4180 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
4183 * More optimized functions for SPARC. Implemented by David S. Miller.
4185 * Improved support for cross-compilation, especially bootstrap builds
4186 without a previously built glibc.
4188 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
4189 Chris Metcalf from Tilera.
4191 * Support for the old ARM ABI has been removed from ports. Only the EABI is
4192 now supported for ARM processors.
4194 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
4195 as the name of the dynamic linker, to distinguish it from the
4196 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
4198 * Support for CRIS has been removed from ports.
4200 * A new class of installed header has been documented for low-level
4201 platform-specific functionality. PowerPC added the first instance with a
4202 function to provide time base register access. Contributed by Tulio
4203 Magno Quites Machado Filho.
4205 * ix86 configurations now install header files that are consistent with
4206 what x86-64 configurations install. These same header files can be used
4207 for -m32, -m64, or -mx32 builds.
4208 Contributed by H.J. Lu.
4210 * Math library bug fixes. A thorough audit of all open math library bugs was
4211 conducted by Joseph Myers. Significant progress was made on many math
4212 library bugs resulting in more accurate exceptions and function results.
4213 Many thanks to all those that contributed including Andreas Jaeger for his
4214 patch review and work on the x87 trigonometric instruction issues.
4216 * Timezone data is no longer installed. Timezone-related binaries and scripts
4217 will continue to be installed. Users should obtain their timezone data from
4218 their distribution provider or from the tzdata package at
4219 <ftp://munnari.oz.au/pub/>.
4223 * The following bugs are resolved with this release:
4225 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
4226 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
4227 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
4228 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
4229 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
4230 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
4231 13484, 13506, 13515, 13523, 13524, 13538, 13540
4233 * New program pldd to list loaded object of a process
4234 Implemented by Ulrich Drepper.
4236 * Add nss_db support back to glibc. No more dependency on Berkeley db
4237 and support for initgroups lookups.
4238 Implemented by Ulrich Drepper.
4240 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4241 Contributed by HJ Lu.
4243 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4244 Contributed by HJ Lu.
4246 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4247 on x86-32 and x86-64.
4248 Contributed by Liubov Dmitrieva.
4250 * Optimized strchr and strrchr for SSE on x86-32.
4251 Contributed by Liubov Dmitrieva.
4253 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4254 for x86-64 and x86-32.
4255 Contributed by Liubov Dmitrieva.
4257 * New interfaces: scandirat, scandirat64
4258 Implemented by Ulrich Drepper.
4260 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4261 Implemented by Ulrich Drepper.
4263 * nscd now also caches the netgroup database.
4264 Implemented by Ulrich Drepper.
4266 * Integrate libm with gcc's -ffinite-math-only option.
4267 Implemented by Ulrich Drepper.
4269 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4270 to math functions. Implemented by Ulrich Drepper.
4272 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4273 Implemented by Ulrich Drepper.
4275 * New Linux interfaces: process_vm_readv, process_vm_writev
4277 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4278 Implemented by Ulrich Drepper.
4280 * Optimized nearbyint and strcasecmp for PPC.
4281 Implemented by Adhemerval Zanella.
4283 * New locales: bho_IN, unm_US, es_CU, ta_LK
4287 * The following bugs are resolved with this release:
4289 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4290 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4291 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4292 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4293 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4294 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4295 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4296 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4297 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4298 12795, 12811, 12813, 12814, 12841
4300 * The RPC implementation in libc is obsoleted. Old programs keep working
4301 but new programs cannot be linked with the routines in libc anymore.
4302 Programs in need of RPC functionality must be linked against TI-RPC.
4303 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4305 Visible changes of this change include (obviously) the inability to link
4306 programs using RPC functions without referencing the TI-RPC library and the
4307 removal of the RPC headers from the glibc headers.
4308 Implemented by Ulrich Drepper.
4310 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4311 syncfs, setns, sendmmsg
4313 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4314 yue_HK, lij_IT, mhr_RU
4316 * New encodings: CP770, CP771, CP772, CP773, CP774
4318 * New program sotruss to trace calls through PLTs
4319 Implemented by Ulrich Drepper.
4321 * The malloc hook implementation is marked deprecated and will be removed
4322 from the default implementation in the next version. The design never
4323 worked ever since the introduction of threads. Even programs which do
4324 not create threads themselves can use multiple threads created internally.
4328 * The following bugs are resolved with this release:
4330 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4331 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4332 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4333 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4336 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4338 * POWER7 optimizations: memset, memcmp, strncmp
4340 * New optimized string functions for x86-64: strnlen (SSE2),
4341 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4342 Implemented by Ulrich Drepper.
4346 * The following bugs are resolved with this release:
4348 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4349 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4350 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4351 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4352 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4353 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4354 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4355 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4357 * New interfaces: pthread_getname_np, pthread_setname_np
4359 * New Linux interface: recvmmsg
4361 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4363 * The dynamic linker now recognizes supported ABI versions from the
4364 EI_ABIVERSION field in the ELF header.
4365 Implemented by Ulrich Drepper.
4367 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4368 will not be used to fill in password fields in the passwd.byname replies.
4369 Instead it is used to synthesize the shadow.byname table, should it be
4370 missing. This is a useful mode in some installations involving Solaris.
4371 Implemented by Ulrich Drepper.
4373 * New locales: kok_IN, sq_MK, cv_RU
4377 * The following bugs are resolved with this release:
4379 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4380 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4381 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4382 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4383 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4384 10789, 10817, 10823, 10840, 10847
4386 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4388 Implemented by Ulrich Drepper.
4390 * Checking version of longjmp added that fails if an uninitialized stack
4391 frame would be created. Implemented by Ulrich Drepper.
4393 * STT_GNU_IFUNC is now supported in static executables.
4394 Implemented by H.J. Lu.
4396 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4398 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4399 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4400 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4401 Contributed by H.J. Lu.
4403 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4404 Implemented by Ulrich Drepper.
4406 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4408 Contributed by H.J. Lu.
4410 * Support for fma instruction in AVX on x86-64.
4411 Implemented by H.J. Lu and Ulrich Drepper.
4413 * AVX support in x86-64 auditing support in ld.so.
4414 Implemented by H.J. Lu.
4416 * STB_GNU_UNIQUE support added.
4417 Implemented by Ulrich Drepper.
4419 * Implement second fallback mode for optimized DNS lookup for even more
4420 broken environments. If two requests from the same port are not
4421 handled correctly close the socket and open a new one before sending
4422 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4423 can be used to select this mode right away, instead of rediscovering the
4424 necessity is every process again.
4425 Implemented by Ulrich Drepper.
4427 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4428 Implemented by Adam Tkac.
4430 * Optimized iconv conversions for S390x.
4431 Implemented by Andreas Krebbel.
4433 * Using condvars with PI mutexes is now more efficient due to kernel
4434 support for requeueing to PI futexes. NPTL support added for x86-64.
4435 Implemented by Ulrich Drepper.
4437 * New locales: ps_AF, my_MM
4441 * The following bugs are resolved with this release:
4443 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4444 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4445 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4446 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4447 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4449 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4450 Implemented by Ulrich Drepper.
4452 * New Linux interfaces: accept4, fallocate, fallocate64.
4453 Implemented by Ulrich Drepper.
4455 * Correct declarations of string function when used in C++ code. This
4456 could lead to compile errors for invalid C++ code.
4458 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4461 * New POSIX 2008 interface: psiginfo
4462 Implemented by Ulrich Drepper.
4464 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4465 Implemented by Ulrich Drepper.
4467 * Support for selecting between multiple function definitions at runtime
4468 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4470 * The libcrypt library can now use the hash function implementations in
4471 NSS. Implemented by Ulrich Drepper.
4473 * The malloc implementation can be compiled to be less memory efficient
4474 but higher performing in multi-threaded programs.
4475 Implemented by Ulrich Drepper.
4477 * New locales: nan_TW@latin, ks_IN
4479 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4480 Implemented by Ulrich Drepper.
4482 * Extended printf hook support. It is possible to use user-defined types
4483 and extend existing format specifiers.
4484 Implemented by Ulrich Drepper.
4486 * Handling for group shadow files has been added.
4487 Implemented by Ulrich Drepper.
4489 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4490 servers (the case, e.g., for some people using the built-in DNS
4491 server in ADSL modems/routers). There is a once-per-process timeout
4492 in case of a broken server. To avoid it, users can run nscd or put
4493 'options single-request' in /etc/resolv.conf.
4494 Implemented by Ulrich Drepper.
4498 * The following bugs are resolved with this release:
4500 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4501 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4502 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4503 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4504 6968, 6974, 6980, 6995, 7008, 7009, 7029
4506 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4507 up at the same time. Implemented by Ulrich Drepper.
4509 * TLS descriptors for LD and GD on x86 and x86-64.
4510 Implemented by Alexandre Oliva.
4512 * getaddrinfo now handles DCCP and UDPlite.
4513 Implemented by Ulrich Drepper.
4515 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4516 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4517 Implemented by Ulrich Drepper.
4519 * New implementation of memmem, strstr, and strcasestr which is O(n).
4520 Implemented by Eric Blake.
4522 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4524 * Implement "e" option for popen to open file descriptor with the
4525 close-on-exec flag set. Implemented by Ulrich Drepper.
4527 * Implement "b" mode for fmemopen. In this mode writes writes don't
4528 implicitly add a NUL byte and seeks from the end of the buffer really
4529 use the buffer end, not the string length as the basis.
4530 Implemented by Ulrich Drepper.
4532 * Many functions, exported and internal, now atomically set the close-on-exec
4533 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4535 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4537 Implemented by Pravin Satpute.
4539 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4543 * The following bugs are resolved with this release:
4545 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4546 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4547 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4548 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4549 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4550 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4551 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4553 * New locales: bo_CN, bo_IN, shs_CA.
4555 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4557 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4558 Implemented by Pravin Satpute.
4560 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4562 * nscd caches now all timeouts for DNS entries
4563 Implemented by Ulrich Drepper.
4565 * nscd is more efficient and wakes up less often.
4566 Implemented by Ulrich Drepper.
4568 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4569 vdprintf, and obstack_vprintf.
4570 Implemented by Jakub Jelinek.
4572 * Faster memset for x86-64.
4573 Implemented by Harsha Jagasia and H.J. Lu.
4575 * Faster memcpy on x86.
4576 Implemented by Ulrich Drepper.
4578 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4579 Implemented by Ulrich Drepper.
4581 * Faster sqrt and sqrtf implemention for some PPC variants.
4582 Implemented by Steven Munroe.
4586 * The following bugs are resolved with this release:
4588 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4589 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4590 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4591 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4592 5071, 5103, 5104, 5112, 5113, 5184, 5186
4594 * More checking functions: fread, fread_unlocked, open*, mq_open.
4595 Implemented by Jakub Jelinek and Ulrich Drepper.
4597 * Extend fortification to C++. Implemented by Jakub Jelinek.
4599 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4600 by not recognizing 'a' as a modifier when those specs are requested.
4601 Implemented by Jakub Jelinek.
4603 * PPC optimizations to math and string functions.
4604 Implemented by Steven Munroe.
4606 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4607 options to be passed. Implemented by Ulrich Drepper.
4609 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4611 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4612 Implemented by Ulrich Drepper.
4614 * Handle private futexes in the NPTL implementation.
4615 Implemented by Jakub Jelinek and Ulrich Drepper.
4617 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4618 Implemented by Roland McGrath and Ulrich Drepper.
4620 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4622 * SHA-256 and SHA-512 based password encryption.
4623 Implemented by Ulrich Drepper.
4625 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4626 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4629 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4630 Implemented by Ulrich Drepper.
4634 * The following bugs are resolved with this release:
4636 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4637 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4638 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4639 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4640 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4641 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4642 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4645 * New Linux interfaces: epoll_pwait, sched_getcpu.
4647 * New generic interfaces: strerror_l.
4649 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4653 * The following bugs are resolved with this release:
4655 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4656 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4657 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4658 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4659 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4660 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4661 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4662 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4663 3225, 3251, 3252, 3253, 3273
4665 * For Linux, the sorting of addresses returned by getaddrinfo now also
4666 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4667 Implemented by Ulrich Drepper.
4669 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4670 Implemented by Ulrich Drepper.
4672 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4674 * New iconv module for MIK. Contributed by Alexander Shopov.
4676 * For sites with broken group and/or passwd database, the auto-propagate
4677 option of nscd can prevent creating ID lookup entries from the results
4678 of a name lookup and vice versa. This usually is no problem but some
4679 site might have problems with the default behavior.
4680 Implemented by Ulrich Drepper.
4682 * Iterating over entire database in NIS can be slow. With the
4683 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4684 to trade time for memory. The entire database will be read at once.
4685 Implemented by Ulrich Drepper.
4687 * The interfaces introduced in RFC 3542 have been implemented by
4690 * Support for the new ELF hash table format was added by Ulrich Drepper.
4692 * Support for priority inheritance mutexes added by Jakub Jelinek and
4695 * Support for priority protected mutexes added by Jakub Jelinek.
4697 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4698 or_IN, csb_PL, fy_NL, sr_ME.
4702 * More overflow detection functions.
4704 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4705 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4707 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4708 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4709 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4710 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4711 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4712 by Masahide Washizawa.
4714 * It is now possible to install audit libraries for the dynamic linker using
4715 LD_AUDIT. Implemented by Ulrich Drepper.
4717 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4718 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4719 For a libc and libpthread that works well on Linux 2.4 kernels, we
4720 recommend using the stable 2.3 branch.
4722 * The new function open_wmemstream acts like open_memstream,
4723 but uses a wchar_t wide character buffer.
4725 * The new function ppoll is an improved version of poll, similar to pselect.
4727 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4728 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4729 renameat, unlinkat, linkat, symlinkat, readlinkat.
4731 * New Linux kernel system calls: unshare,
4732 inotify_init, inotify_add_watch, inotify_rm_watch.
4734 * The euidaccess function is now also known by the alias eaccess,
4735 for compatibility with some other systems.
4737 * Timezone data updated to 2006b version.
4741 * The following bugs are resolved with this release:
4743 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4744 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4745 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4746 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4747 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4748 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4750 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4752 * As of this release, GCC 4 can be used to compile the C Library.
4754 * Timezone data updated to 2005m version.
4758 * The following bugs are resolved with this release:
4760 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4761 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4762 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4763 777, 787, 821, 822, 823, 825
4765 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4769 * Support for RFC 3678. Real implementations exist only for Linux so far.
4770 Implemented by Ulrich Drepper.
4772 * nscd can now cache entries persistently. Expiring entries are reloaded.
4773 For speedups the cache can be shared in memory with client processes.
4774 Implemented by Ulrich Drepper.
4776 * nscd can now perform SELinux checks.
4777 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4779 * getaddrinfo queries are now cached. Canonical name lookup is performed
4781 Implemented by Ulrich Drepper.
4783 * The nothrow function attribute is used when headers are used by gcc when
4784 compiling C code. This can avoid significant amounts of exception
4787 * The malloc functions perform more error checking and are stricter when
4788 it comes to reacting on errors. The default action is to terminate
4789 the process after showing an error message. Implemented by Ulrich Drepper.
4791 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4792 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4794 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4795 namespaces using the new function dlmopen(). This feature is of course,
4796 like most other dynamic loading functionality, not available in statically
4797 linked applications. Implemented by Ulrich Drepper.
4799 * Low-overhead boundary checking variants of string and some stdio functions
4800 were added. These are to be used in conjunction with a gcc patch by
4801 Jakub Jelinek which adds calls to these functions if possible.
4802 Implemented by Jakub Jelinek and Ulrich Drepper.
4804 * Old code for several operating systems and machine architectures that
4805 have not been in working condition in a long time have been removed from
4806 the main source tree maintained by the GNU C Library's maintainers.
4807 These files are now reside in the separate `ports' source module
4808 that is usable as an add-on when building the library.
4812 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4813 interrogate the dynamic linker, compatible with the Solaris interface.
4815 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4816 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4818 * getifaddrs now uses the netlink interface on Linux to get its information.
4819 Implemented by Thorsten Kukuk.
4821 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4822 Implemented by Ulrich Drepper.
4824 * support for non-executable stacks on x86 has been added. Changes mostly
4827 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4830 * getaddrinfo now performs destination address selection according to
4835 * Thread-safe interfaces for many functions that access locale data
4836 were added in version 2.3, but these features were omitted from NEWS.
4837 Many functions have variants with an `_l' suffix that take a `locale_t'
4838 object as a parameter rather than consulting the current locale.
4839 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4840 create and maintain `locale_t' objects. Additionally, the new function
4841 `uselocale' sets "the current locale" (as used by functions not so
4842 parameterized) set for an individual thread. These features were added
4843 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4845 * The functions getresuid, getresgid, setresuid, and setresgid, which
4846 have long been available on Linux, are now declared in <unistd.h>
4847 and are now also available on the Hurd.
4849 * ELF thread-local storage support (TLS) now works on x86-64.
4851 * The new dynamic string token $LIB is expanded in shared library names.
4852 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4854 * Aldy Hernandez contributed complete software floating point support for
4855 PowerPC machines with no FPU.
4857 * fexecve is implemented on Linux.
4859 * The `btowc' function should work at least twice as fast due to
4860 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4862 * With approriate thread add-ons cancelable functions are now implemented
4863 in libc.so as well. No need to call the function in libpthread. This
4864 change allowed to finally disable the incorrect and expensive handling
4865 of weak definition in ld.so.
4867 * Yet more PLT entries in libc.so have been removed. We finally arrived
4868 at the bare minimum. Startup times improved appropriately.
4870 * Support for the new Linux/x86 system call interface was added. The
4871 AT_SYSINFO auxiliary vector entry is recognized and handled.
4875 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4878 * iconv (the program and the interface) now accepts empty names (excluding
4879 options like //TRANSLIT) to mean "use charset of current locale".
4881 * localedef can now transliterate characters in strings which are not in
4882 the provided charmap. The information from the input locale is used.
4884 * Prelinking support was added for ELF targets. This requires additional
4885 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4887 * Read-only stdio streams now use mmap to speed up operation by eliminating
4888 copying and buffer underflows. To use add 'm' to the mode string of
4889 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4891 * The malloc functions were completely rewritten by Wolfram Gloger based
4892 on Doug Lea's malloc-2.7.0.c.
4894 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4895 implementation of regex.
4897 * Bruno Haible upgraded the iconv and locale implementation to support
4900 * Contents of the LC_* and LANG environment variables in the CEN style are
4901 not recognized anymore. It never was used. Change by Ulrich Drepper.
4903 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4904 thread-local storage (TLS) ABI on some platforms.
4905 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4907 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4908 EUC-JISX0213, and TSCII.
4910 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4911 BSD-compatible interface for getting all network interface addresses.
4912 Implementation for IPv4 by Roland McGrath.
4914 * Loading of locale data is faster due to the introduction of a locale
4915 archive. Implemented by Roland McGrath and Ulrich Drepper.
4917 * Startup times are significantly reduced by not using exported functions
4918 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4921 * Steven Munroe contributed a port to PowerPC64/Linux.
4925 * The Hurd now uses the GNU libio implementation of stdio rather than the
4926 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4928 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4929 with the same behavior as the Linux system call of the same name.
4933 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4934 128-bit long double format.
4936 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4937 IBM1161, and IBM1162 charsets.
4939 * Andreas Jaeger contributed a port to x86-64/Linux.
4941 * Peter Bruin contributed a port to PowerPC/Hurd.
4943 * libc functions using I/O streams now can handle wide-oriented streams
4946 * optimizations in the dynamic linker. Binaries created by recent binutils
4947 versions start up quicker due to reduced time spent on relocations.
4949 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4953 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4954 asinh, atanh, j0 for the 128-bit long double format.
4956 * Bruno Haible updated all the code handling Unicode in some form to
4957 support Unicode 3.1.
4959 * Speed of regex for single-byte locales is back to previous levels.
4960 Patch by Isamu Hasegawa.
4962 * Alpha, SPARC, and IA-64 now also using floating stacks.
4964 * Startup time of internationalized applications greatly improved through
4965 iconv cache. Use iconvconfig to generate the cache file.
4966 Contributed by Ulrich Drepper.
4968 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4969 severe performance problems. Patch by David Mosberger.
4971 * The Hurd port got a lot more functionality like AIO, various stdio
4972 extensions, etc. Mainly done by Roland McGrath.
4974 * mtrace can now lookup symbols in shared libraries.
4978 * Intel's IA-64 math library is largely integrated. It provides fast and
4979 accurate implementatations for most basic and standard math functions
4980 in float, double, and long double format.
4982 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4983 and asin for the 96-bit long double format and asin, log, tan for the
4984 128-bit long double format.
4986 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4987 The basic double functions exist today. Contributed by Abraham Ziv
4988 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4989 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4991 * An asynchronous name lookup library was added. The interface is designed
4992 after POSIX AIO. The proposal was circulated beforehand to get comments.
4993 No negative ones came in. Implemented by Ulrich Drepper.
4995 * Port to S390/64bit contributed by Martin Schwidefsky
4996 <schwidefsky@de.ibm.com>.
4998 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4999 of functions for Linux/IA-64.
5001 * The RPC code is now thread safe. Threads can now use the same service
5002 of different services at the same time. Patch by Eric Norum
5003 <eric.norum@usask.ca> with some help by Ulrich Drepper.
5005 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
5006 family of functions for Linux/S390.
5008 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
5009 of functions for Linux/x86.
5011 * Port to Linux/CRIS contributed by Axis Communications.
5015 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
5016 we can now check for namespace violations and missing declarations. The
5017 result is that almost all headers are now Unix-compliant (as defined in
5018 the upcoming XPG6). The negative side is that some programs might need
5019 corrections, too, if they depend on the incorrect form of the headers in
5020 previous versions which defined too many symbols and included too many
5023 * regex now handles multibyte character sets correctly.
5024 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
5026 * iconv (the program) does now conform to the upcoming XPG6 and handles
5027 charmaps. Instead of the charset names the path of charmaps can be
5028 provided and the conversion happens based on this data.
5029 Contributed by Ulrich Drepper.
5031 * The locale program now provides detailed information about the installed
5036 only lists the names of the supported locales
5040 provides details such as country, language, and codeset name.
5041 Contributed by Ulrich Drepper.
5045 * The gencat program now parses the input file according to the charset
5046 selected by the LC_CTYPE category. This is important for stateful
5047 character sets. To make generating catalogs easier there is a way
5048 to overwrite the charset selected by the locale: before the first
5049 message or $ quote line the catalog can contain a line like
5051 $ codeset=ISO-8859-2
5053 to select the charset (ISO-8859-2 in this case).
5055 Implemented by Shinya Hanataka and Ulrich Drepper.
5057 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
5058 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
5059 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
5061 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
5062 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
5064 * The LANGUAGE environment variable is now ignored unless the locale is
5065 changed from the default "C" locale.
5067 * The usual bug fixes.
5071 * Greg McGary added runtime support for bounds checking using gcc's
5072 new -fbounded-pointers option. ix86 target is complete. PowerPC
5075 * Thorsten Kukuk added secure mode support to nscd.
5077 * The Berkeley db libraries have been removed.
5079 Related, the nss_db module is now in a separate package since it
5080 obviously requires a database library being available.
5082 * Wide character I/O streams implemented by Ulrich Drepper.
5084 * Functions from the extended socket API added by Ulrich Drepper.
5086 * Functions feenableexcept and fedisableexcept to control the
5087 behaviour of individual exceptions have been added by Andreas Jaeger.
5089 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
5091 * The resolver code has been updated from bind 8.2.3-T5B which supports
5092 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
5095 This change could in some situations effect backward compatibility. Since
5096 now `_res' is a thread-local instead of a global variable, modifying it
5097 in one thread does not have any effect in other threads.
5099 The resolver library was also extended to allow IPv6 as the transport
5100 protocol for the requests. This work was done by Stig Venaas.
5102 * Compatibility code for K&R C compilers has been removed from the
5103 header files. A ISO C compiler is needed to use the library
5104 (conforming to either C89 or C99 standard).
5106 * Complete rewrite of the localedef program to support multibyte character
5107 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
5108 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
5109 Implemented by Ulrich Drepper.
5111 Bruno Haible significantly improved the generation and use of the data
5112 structures for the wide character tables.
5114 * Plural handling in gettext implemented by Ulrich Drepper.
5116 * The utmp daemon has been removed.
5118 * The port to MIPS-Linux has been finished by Andreas Jaeger.
5120 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
5123 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
5125 * POSIX barriers implemented by Kaz Kylheku.
5127 * POSIX spawn function family implemented by Ulrich Drepper.
5129 * POSIX spinlocks are now available.
5131 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
5133 * the configure option --enable-kernel=X.Y.Z allows to strip out
5134 compatibility for kernel versions before X.Y.Z. This is currently only
5135 implemented for Linux.
5137 * the sockaddr_in6 structure changed. The IPv6 working group added a new
5138 field sin6_scope_id. This means that all programs using IPv6 should be
5139 recompiled. Don't expect binary compatibility with previous glibc
5142 * various conversion modules for IBM character sets contributed by
5145 * IA-64 port by Jes Sorensen and HJ Lu.
5159 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
5161 * New xdr functions are added; some rpc functions are now 64bit clean.
5163 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
5165 * Fixed known incompatibilities with glibc 2.0.
5167 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
5169 * Optimized a number of functions (especially the ELF dynamic loader).
5171 * Update timezone data files.
5173 * lots of charmaps corrections
5175 * some new locale definitions and charmaps
5180 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
5181 conform to POSIX member type requirements. Symbol versions have been
5182 adjusted as needed within the library, and for direct use by applications,
5183 but there is potential for problems if third-party libraries use
5184 struct timeval as part of their interface. This does not present
5185 a problem for X and other "essential" system libraries.
5187 * An additional locale model to support C++ Standard Library locale
5188 model and probably more was implemented by Ulrich Drepper.
5190 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
5193 * Miles Bader provided the `argp' function family to support hierachical
5194 command line argument parsing, layered on top of getopt.
5196 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
5198 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
5201 * scanf recognizes the %a and %A format for scanning floating point numbers.
5203 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
5204 information and interfaces for the available integer types.
5206 * about 130 new math functions were added to implement the ISO C9x math
5209 * the new header <complex.h> contains definitions of the complex math
5210 functions from ISO C 9X.
5212 * the new header <tgmath.h> defines generic macros to use complex or
5213 real valued functions.
5215 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
5217 * Andreas Jaeger provided a test suite for the math library.
5219 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
5221 * Ulrich Drepper added character set conversion functions (iconv).
5223 * Optimized string functions have been added.
5225 * The localedata addon is now part of glibc.
5227 * An implementation of profiling shared libraries was added by Ulrich Drepper.
5229 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
5230 daemon for NSS (nscd).
5232 Missing a better place here are some numbers on improvements. Under
5233 Linux 2.1.125 un-tar-ing the kernel sources takes
5237 using local files 12.19s 6.88s 22.91s
5239 using NIS 13.92s 8.91s 26.34s
5241 using NIS & nscd 10.37s 7.34s 25.30s
5243 using NIS+ 27.57s 30.37s 640.46s
5245 using NIS+ & nscd 10.25s 7.83s 26.51s
5247 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5249 Keep in mind that non-namelookup related operations dominate above times.
5250 It was just a common complain that using NIS+ unpacking the kernel is
5253 [1] The old nscd implementation is not available anymore since it was
5254 distributed with glibc up to version 2.0.98 and thus is now replaced.
5256 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5258 * Mark Kettenis provided a Hesiod NSS module.
5260 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5261 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5263 * rcmd can now handle netgroups (Dick Streefland).
5265 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5268 * Support for the IPv6 protocol has been added to the socket API, as per the
5269 latest draft standards.
5271 * Support for Linux 2.2 has been added.
5273 * Interface changes relative to the latest 2.0.x release:
5274 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5275 addseverity NEW: Unix98
5276 alphasort64 NEW: LFS
5277 argp_err_exit_status NEW: argp, GNU ext
5278 argp_error NEW: argp, GNU ext
5279 argp_failure NEW: argp, GNU ext
5280 argp_help NEW: argp, GNU ext
5281 argp_parse NEW: argp, GNU ext
5282 argp_program_bug_address NEW: argp, GNU ext
5283 argp_program_version NEW: argp, GNU ext
5284 argp_program_version_hook NEW: argp, GNU ext
5285 argp_state_help NEW: argp, GNU ext
5286 argp_usage NEW: argp, GNU ext
5287 authdes_create NEW: Secure RPC
5288 authdes_getucred NEW: Secure RPC
5289 authdes_pk_create NEW: Secure RPC
5290 backtrace NEW: GNU ext.
5291 backtrace_symbols NEW: GNU ext.
5292 backtrace_symbols_fd NEW: GNU ext.
5294 cacosf NEW: ISO C 9x
5295 cacosh NEW: ISO C 9x
5296 cacoshf NEW: ISO C 9x
5297 cacoshl NEW: ISO C 9x
5298 cacosl NEW: ISO C 9x
5305 casinf NEW: ISO C 9x
5306 casinh NEW: ISO C 9x
5307 casinhf NEW: ISO C 9x
5308 casinhl NEW: ISO C 9x
5309 casinl NEW: ISO C 9x
5311 catanf NEW: ISO C 9x
5312 catanh NEW: ISO C 9x
5313 catanhf NEW: ISO C 9x
5314 catanhl NEW: ISO C 9x
5315 catanl NEW: ISO C 9x
5316 cbc_crypt NEW: Secure RPC
5320 ccoshf NEW: ISO C 9x
5321 ccoshl NEW: ISO C 9x
5327 cimagf NEW: ISO C 9x
5328 cimagl NEW: ISO C 9x
5329 clearerr_locked REMOVED
5330 clntunix_create NEW: sunrpc ext
5332 clog10 NEW: ISO C 9x
5333 clog10f NEW: ISO C 9x
5334 clog10l NEW: ISO C 9x
5344 cprojf NEW: ISO C 9x
5345 cprojl NEW: ISO C 9x
5347 crealf NEW: ISO C 9x
5348 creall NEW: ISO C 9x
5353 csinhf NEW: ISO C 9x
5354 csinhl NEW: ISO C 9x
5357 csqrtf NEW: ISO C 9x
5358 csqrtl NEW: ISO C 9x
5362 ctanhf NEW: ISO C 9x
5363 ctanhl NEW: ISO C 9x
5365 des_setparity NEW: Secure RPC
5366 ecb_crypt NEW: Secure RPC
5367 endutxent NEW: Unix98
5369 exp10f NEW: ISO C 9x
5370 exp10l NEW: ISO C 9x
5374 fattach NEW: STREAMS
5375 fdetach NEW: STREAMS
5379 feclearexcept NEW: ISO C 9x
5380 fegetenv NEW: ISO C 9x
5381 fegetexceptflag NEW: ISO C 9x
5382 fegetround NEW: ISO C 9x
5383 feholdexcept NEW: ISO C 9x
5385 feraiseexcept NEW: ISO C 9x
5386 ferror_locked REMOVED
5387 fesetenv NEW: ISO C 9x
5388 fesetexceptflag NEW: ISO C 9x
5389 fesetround NEW: ISO C 9x
5390 fetestexcept NEW: ISO C 9x
5391 feupdateenv NEW: ISO C 9x
5392 fflush_locked REMOVED
5396 fgets_unlocked NEW: GNU ext.
5397 fileno_locked REMOVED
5409 fputc_locked REMOVED
5410 fputs_unlocked NEW: GNU ext.
5411 fread_unlocked NEW: GNU ext.
5416 fstatvfs NEW: Unix98
5420 ftruncate64 NEW: LFS
5422 fwrite_unlocked NEW: GNU ext.
5423 gai_strerror NEW: IPv6
5427 getchar_locked REMOVED
5429 getdate_err NEW: Unix98
5430 getdate_r NEW: GNU ext.
5432 getnameinfo NEW: IPv6
5433 getnetname NEW: Secure RPC
5434 getpmsg NEW: STREAMS
5435 getpt NEW: Unix98 PTY
5436 getrlimit64 NEW: LFS
5437 getutxent NEW: Unix98
5438 getutxid NEW: Unix98
5439 getutxline NEW: Unix98
5440 glob64 NEW: GNU ext.
5441 globfree64 NEW: GNU ext.
5442 gnu_get_libc_release NEW: GNU ext.
5443 gnu_get_libc_version NEW: GNU ext.
5444 grantpt NEW: Unix98 PTY
5445 host2netname NEW: Secure RPC
5447 iconv_close NEW: iconv
5448 iconv_open NEW: iconv
5449 if_freenameindex NEW: IPv6
5450 if_indextoname NEW: IPv6
5451 if_nameindex NEW: IPv6
5452 if_nametoindex NEW: IPv6
5453 in6addr_any NEW: IPv6
5454 in6addr_loopback NEW: IPv6
5455 inet6_isipv4mapped NEW: IPv6
5456 isastream NEW: STREAMS
5457 iswblank NEW: GNU ext.
5458 key_decryptsession NEW: Secure RPC
5459 key_decryptsession_pk NEW: Secure RPC
5460 key_encryptsession NEW: Secure RPC
5461 key_encryptsession_pk NEW: Secure RPC
5462 key_gendes NEW: Secure RPC
5463 key_get_conv NEW: Secure RPC
5464 key_secretkey_is_set NEW: Secure RPC
5465 key_setnet NEW: Secure RPC
5466 key_setsecret NEW: Secure RPC
5467 llrint NEW: ISO C 9x
5468 llrintf NEW: ISO C 9x
5469 llrintl NEW: ISO C 9x
5470 llround NEW: ISO C 9x
5471 llroundf NEW: ISO C 9x
5472 llroundl NEW: ISO C 9x
5477 lrintf NEW: ISO C 9x
5478 lrintl NEW: ISO C 9x
5479 lround NEW: ISO C 9x
5480 lroundf NEW: ISO C 9x
5481 lroundl NEW: ISO C 9x
5483 makecontext NEW: Unix98
5484 mempcpy NEW: GNU ext.
5487 modify_ldt NEW: kernel
5491 nearbyint NEW: ISO C 9x
5492 nearbyintf NEW: ISO C 9x
5493 nearbyintl NEW: ISO C 9x
5494 netname2host NEW: Secure RPC
5495 netname2user NEW: Secure RPC
5496 nexttoward NEW: ISO C 9x
5497 nexttowardf NEW: ISO C 9x
5498 nexttowardl NEW: ISO C 9x
5502 passwd2des NEW: Secure RPC
5504 pow10f NEW: GNU ext.
5505 pow10l NEW: GNU ext.
5508 printf_size NEW: GNU ext.
5509 printf_size_info NEW: GNU ext.
5510 profil_counter REMOVED
5511 pthread_mutexattr_getkind_np REPLACED
5512 pthread_mutexattr_setkind_np REPLACED
5513 ptsname NEW: Unix98 PTY
5514 ptsname_r NEW: Unix98 PTY
5516 putchar_locked REMOVED
5517 putgrent NEW: GNU ext.
5519 putpmsg NEW: STREAMS
5520 pututxline NEW: Unix98
5524 readdir64_r NEW: LFS
5525 remquo NEW: ISO C 9x
5526 remquof NEW: ISO C 9x
5527 remquol NEW: ISO C 9x
5529 roundf NEW: ISO C 9x
5530 roundl NEW: ISO C 9x
5532 scalbln NEW: ISO C 9x
5533 scalblnf NEW: ISO C 9x
5534 scalblnl NEW: ISO C 9x
5536 sendfile NEW: kernel
5537 setcontext NEW: Unix98
5538 setrlimit64 NEW: LFS
5539 setutxent NEW: Unix98
5541 sigignore NEW: Unix98
5542 sigqueue NEW: POSIX.1b
5543 sigrelse NEW: Unix98
5544 sigset NEW: POSIX.1b
5545 sigtimedwait NEW: POSIX.1b
5546 sigwaitinfo NEW: POSIX.1b
5547 sincos NEW: GNU ext.
5548 sincosf NEW: GNU ext.
5549 sincosl NEW: GNU ext.
5553 strcasestr NEW: GNU ext.
5554 strtoimax NEW: ISO C 9x
5555 strtoumax NEW: ISO C 9x
5556 strverscmp NEW: GNU ext.
5557 svcauthdes_stats NEW: Secure RPC
5558 svcunix_create NEW: sunrpc etx
5559 svcunixfd_create NEW: sunrpc ext
5560 swapcontext NEW: Unix98
5561 tcgetsid NEW: Unix98 PTY
5562 tdestroy NEW: GNU ext.
5563 tgamma NEW: ISO C 9x
5564 tgammaf NEW: ISO C 9x
5565 tgammal NEW: ISO C 9x
5569 truncf NEW: ISO C 9x
5570 truncl NEW: ISO C 9x
5572 unlockpt NEW: Unix98 PTY
5573 updwtmpx NEW: Unix98
5574 user2netname NEW: Secure RPC
5575 utmpxname NEW: Unix98
5576 versionsort NEW: GNU ext.
5577 versionsort64 NEW: GNU ext.
5579 wcscasecmp NEW: GNU ext.
5580 wcsncasecmp NEW: GNU ext.
5581 wcsnlen NEW: GNU ext.
5582 wcstoimax NEW: ISO C 9x
5583 wcstoll NEW: ISO C 9x
5584 wcstoull NEW: ISO C 9x
5585 wcstoumax NEW: ISO C 9x
5587 wordexp NEW: POSIX.2
5588 wordfree NEW: POSIX.2
5589 write_profiling REMOVED
5590 xdecrypt NEW: Secure RPC
5591 xdr_authdes_cred NEW: Secure RPC
5592 xdr_authdes_verf NEW: Secure RPC
5593 xdr_cryptkeyarg NEW: Secure RPC
5594 xdr_cryptkeyarg2 NEW: Secure RPC
5595 xdr_cryptkeyres NEW: Secure RPC
5596 xdr_getcredres NEW: Secure RPC
5597 xdr_key_netstarg NEW: Secure RPC
5598 xdr_key_netstres NEW: Secure RPC
5599 xdr_keybuf NEW: Secure RPC
5600 xdr_keystatus NEW: Secure RPC
5601 xdr_netnamestr NEW: Secure RPC
5602 xdr_sizeof NEW: Secure RPC
5603 xdr_unixcred NEW: sunrpc ext
5604 xencrypt NEW: Secure RPC
5605 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5616 * inet_ntoa is thread-safe
5618 * updwtmp is moved from libutil to libc
5620 * rewrite of cbrt function
5622 * update of timezone data
5636 * add atoll function
5638 * fix complex problems in Berkeley DB code
5640 * fix math functions
5644 * fixed lots of header problems (especially Linux/GNU specific)
5646 * dynamic loader preserves all registers
5648 * Roland McGrath provided support for handling of auxiliary objects in
5649 the ELF dynamic loader.
5651 * support for parallel builds is improved
5655 * GNU extensions are no longer declared by default. To enable them you
5656 must define the macro `_GNU_SOURCE' in your program or compile with
5659 * The library has changed from using GNU ld symbol aliases to using weak
5660 symbols where available. The ELF object file format supports weak
5661 symbols; GNU ld also supports weak symbols in the a.out format. (There
5662 is also now support for other GNU ld extensions in ELF. Use the
5663 `--with-elf' option to configure to indicate you have ELF, and
5664 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5665 of many files which contained only symbol aliases, reducing the size of
5666 the source and the compiled library; many other files were renamed to
5667 less cryptic names previously occupied by the symbol alias files.
5668 There is a new header file <elf.h> for programs which operate on
5669 files in the ELF format.
5671 * Converted to Autoconf version 2, so `configure' has more options.
5672 Run `configure --help' to see the details.
5674 * The library can now be configured to build profiling, highly-optimized
5675 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5676 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5677 `configure' enable building these extra libraries. The shared library is
5678 built by default when using both ELF and GNU ld. When shared libraries
5679 are enabled, the new library `-ldl' is available for arbitrary run-time
5680 loading of shared objects; its interface is defined in <dlfcn.h>. The
5681 new header file <link.h> gives access to the internals of the run-time
5682 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5683 application of same name on other systems and it provides information
5684 about dynamically linked binaries.
5686 * The C library now provides the run-time support code for profiling
5687 executables compiled with `-pg'. Programs can control the profiling code
5688 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5689 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5690 the support for this file format was contributed by David Mosberger-Tang.
5692 * The math code has been replaced with a math library based on fdlibm from
5693 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5694 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5695 functions. The math functions now reside in a separate library, so
5696 programs using them will need to use `-lm' their linking commands.
5698 * John C. Bowman contributed optimized ix87 assembler inline functions.
5700 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5701 mechanism similar to that found in Solaris 2. This is now used for the
5702 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5703 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5704 file controls what services are used for each individual database. This
5705 works by loading shared libraries with names specified in `nsswitch.conf',
5706 so service modules can be changed or added at any time without even
5707 relinking any program. Currently there are the file, db, and NIS based
5708 NSS services available.
5710 * The new functions `strtoq' and `strtouq' parse integer values from
5711 strings, like `strtol' and `strtoul', but they return `long long int' and
5712 `unsigned long long int' values, respectively (64-bit quantities).
5714 * The new functions `strtof' and `strtold' parse floating-point values from
5715 strings, like `strtod', but they return `float' and `long double' values,
5716 respectively (on some machines `double' and `long double' are the same).
5718 * Ulrich Drepper has contributed new implementations of the floating-point
5719 printing and reading code used in the `printf' family of functions and
5720 `strtod', `strtof', and `strtold'. These new functions are perfectly
5721 accurate, and much faster than the old ones.
5723 * The implementation of the POSIX locale model was completely rewritten by
5724 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5725 to compile the POSIX locale definition.
5727 * The former dummy implementations of the strcoll and strxfrm function are
5728 now replaced by fully functional code contributed by Ulrich Drepper. The
5729 collation information comes from the POSIX locale definitions.
5731 * The new header <langinfo.h> defines an interface for accessing
5732 various locale-dependent data (using the locale chosen with `setlocale').
5734 * Ulrich Drepper has contributed a new suite of functions for operation on
5735 wide-character and multibyte-character strings, in <wchar.h>;
5736 and classification and case conversion of wide characters, in <wctype.h>.
5737 These new functions are conforming to the ISO C, Amendement 1 specification.
5739 * There is now a second implementation of the standard I/O library available.
5740 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5741 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5743 * You can now use positional parameter specifications in format strings
5744 for the `printf' and `scanf' families of functions. For example,
5745 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5746 ``Number 6, Mr Jones''. This is mainly useful when providing different
5747 format strings for different languages, whose grammars may dictate
5748 different orderings of the values being printed. To support this
5749 feature, the interface for `register_printf_handler' has changed; see
5750 the header file <printf.h> for details.
5752 * The `printf' and `scanf' families of functions now understand a new
5753 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5754 to group numbers as indicated by the locale; for `scanf' and friends, this
5755 says to accept as valid only a number with all the proper grouping
5756 separators in the right places. In the default "C" locale, numbers are
5757 not grouped; but locales for specific countries will define the usual
5758 conventions (i.e. separate thousands with `,' in the US locale).
5760 * The pgrp functions have been regularized, slightly incompatibly but much
5761 less confusingly. The core functions are now `getpgid' and `setpgid',
5762 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5763 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5764 provided for compatibility. There is no longer an incompatible `getpgrp'
5765 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5767 * The new header file <fts.h> and suite of functions simplify programs that
5768 operate on directory trees. This code comes from 4.4 BSD.
5770 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5771 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5772 NSS scheme used in glibc.
5774 * There is a new malloc debugging hook `__memalign_hook'.
5776 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5777 `unsigned int' in <sys/types.h>. These are for compatibility only and
5778 their use is discouraged.
5780 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5781 done differently, so that it works even without GNU ld.
5783 * New function `euidaccess' checks allowed access to a file like `access',
5784 but using the effective IDs instead of the real IDs.
5786 * The time zone data files have been updated for the latest and greatest
5787 local time conventions of the countries of the world.
5789 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5792 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5793 for formatting floating-point numbers. They are provided only for
5794 compatibility; new programs should use `sprintf' instead. There are
5795 also equivalent function for the `long double' floating-point type and
5796 all functions also exist in a reentrant form.
5798 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5799 functions for maintaining the login-record files (primarily of use to
5800 system programs such as `login'), and convenient functions for
5801 allocating and initializing a pseudo-terminal (pty) device.
5803 * Ulrich Drepper has contributed new support for System V style
5804 shared memory and IPC on systems that support it.
5806 * Ulrich Drepper has contributed several miscellaneous new functions found
5807 in System V: The `hsearch' family of functions provide an effective
5808 implementation of hash tables; `a64l' and `l64a' provide a very simple
5809 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5812 * Ulrich Drepper has contributed new reentrant counterparts for the
5813 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5815 * Ulrich Drepper has contributed new, highly-optimized versions of several
5816 string functions for the i486/Pentium family of processors.
5818 * Ulrich Drepper has updated the Linux-specific code, based largely
5819 on work done in Hongjiu Lu's version of GNU libc for Linux.
5820 The GNU library now supports Linux versions 2.0.10 and later,
5821 using the ELF object file format (i[3456]86-*-linux).
5823 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5825 * David Mosberger-Tang and Richard Henderson have ported the C library
5826 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5827 dynamic linking support for ELF/Alpha.
5829 * Richard Henderson contributed several Alpha optimized assembler function
5830 for arithmetic and string handling.
5832 * Ulrich Drepper has contributed a new set of message catalog functions to
5833 support multiple languages using the <libintl.h> interface, for use with
5834 his new package GNU gettext. Translation volunteers have contributed
5835 catalogs of the library's messages in Spanish, German, and Korean.
5837 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5838 program and the `catgets' function for reading the catalog files it
5839 creates. (The <libintl.h> interface is preferred; we include the
5840 <nl_types.h> interface using `catgets' only for source compatibility with
5841 programs already written to use it.)
5843 * New header file <values.h> gives SVID-compatible names for <limits.h>
5846 * Various new macros, declarations, and small header files for compatibility
5849 * New function `group_member' is a convenient way to check if a process has
5850 a given effective group ID.
5852 * When using GCC 2.7 and later, the socket functions are now declared in a
5853 special way so that passing an argument of type `struct sockaddr_in *',
5854 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5855 `struct sockaddr *' type, does not generate a type-clash warning.
5857 * New function `error' declared in header file <error.h> is a convenient
5858 function for printing error messages and optionally exiting; this is the
5859 canonical function used in GNU programs. The new functions `err', `warn',
5860 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5861 doing the same thing.
5863 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5864 POSIX.2 `glob' function to do ~ and {...} expansion.
5866 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5867 `clearenv' which is used in POSIX.9 is also available.
5869 * New function `getsid' returns session ID number on systems that support it.
5871 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5872 files <db.h> and <mpool.h> provide a rich set of functions for several
5873 types of simple databases stored in memory and in files, and <ndbm.h> is
5874 an old `ndbm'-compatible interface using the `db' functions. Link with
5875 `-ldb' to get these functions.
5877 * New macro `strdupa' copies a string like `strdup', but uses local stack
5878 space from `alloca' instead of dynamic heap space from `malloc'.
5880 * New function `strnlen' is like `strlen' but searches only a given maximum
5881 number of characters for the null terminator. `stpncpy', `strndup' and
5882 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5885 * New function `statfs' in header <sys/statfs.h>.
5887 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5888 provide convenient functions for operating on blocks of null-terminated
5891 * A new suite of functions in <utmp.h> handle all the details of reading
5892 and writing the utmp file.
5894 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5897 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5898 completely POSIX compliant and also implemented the extended functionality
5899 to handle alternate digit representation and alternate era date formats.
5901 * Ulrich Drepper provided an implementation of the `strptime' function
5902 defined in XPG4.2 which transforms a string into a `struct tm' value.
5904 * Paul Eggert provided the tzselect shell script as part of the timezone
5905 code. The shell script makes it easy to select the correct timezone
5908 * The implementation of the malloc family of functions is completely replaced
5909 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5910 The implementation uses the mmap function (if available) and it is
5911 optimized for the use in multi threaded programs.
5913 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5914 functions. This new functionality is usable by specifying a special
5915 salt string and it is compatible with implementation on *BSD systems.
5917 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5918 `getsubopt' to handle second level command line options, `bsd_signal'
5919 to access BSD style `signal' functionality, the obsolete `regexp' style
5922 * the `lchown' function is available on system which support this
5925 * The implementation of the shadow password handling function was contributed
5928 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5930 * POSIX.1g support was added. The <sys/select.h> header is available,
5931 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5932 implementation of `getaddrinfo'.
5936 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5938 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5939 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5941 * The new function `daemon' from 4.4 BSD is useful for server programs that
5942 want to put themselves in the background.
5944 * Joel Sherrill has contributed support for several standalone boards that
5945 run without an operating system.
5947 * `printf', `scanf' and friends now accept a `q' type modifier for long
5948 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5950 * All of the code taken from BSD (notably most of the math and networking
5951 routines) has been updated from the BSD 4.4-Lite release.
5953 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5955 * The new functions `getdomainname' and `setdomainname' fetch or change the
5956 YP/NIS domain name. These are system calls which exist on systems which
5959 * The time zone data files have been updated for the latest international
5962 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5963 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5967 * The C library now includes support for Sun RPC, from Sun's free
5968 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5969 are included. (There is still no support for YP.)
5971 * Tom Quinn has contributed a port of the C library to SGI machines running
5972 Irix 4 (mips-sgi-irix4).
5974 * The new `lockf' function is a simplified interface to the locking
5975 facilities of `fcntl', included for compatibility.
5977 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5979 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5981 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5984 * The error message printed by `assert' for a failed assertion now includes
5985 the name of the program (if using GNU ld) and the name of the calling
5986 function (with versions of GCC that support this).
5988 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5990 * The library now includes the <sys/mman.h> header file and memory
5991 management functions `mmap', `munmap', `mprotect', `msync', and
5992 `madvise', on systems that support those facilities.
5994 * The interface for `mcheck' has changed slightly: the function called to
5995 abort the program when an allocation inconsistency is detected now takes
5996 an argument that indicates the type of failure. The new function
5997 `mprobe' lets you request a consistency check for a particular block at
5998 any time (checks are normally done only when you call `free' or `realloc'
6001 * It is now possible to easily cross-compile the C library, building on one
6002 system a library to run on another machine and/or operating system. All
6003 you need to do is set the variable `HOST_CC' in `configparms' to the
6004 native compiler for programs to run on the machine you are building on (a
6005 few generator programs are used on Unix systems); set `CC' to the
6008 * The new function `fexecve' (only implemented on the GNU system) executes
6009 a program file given a file descriptor already open on the file.
6013 * Brendan Kehoe has contributed most of a port to the DEC Alpha
6014 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
6016 * You can set the variable `libprefix' in `configparms' to specify a prefix
6017 to be prepended to installed library files; this makes it easy to install
6018 the GNU C library to be linked as `-lgnuc' or whatever.
6020 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
6021 copies a limited number of characters from a string, and returns the
6022 address of the last character written.
6024 * You no longer need to check for whether the installed `stddef.h' is
6025 compatible with the GNU C library. configure now checks for you.
6027 * You can now define a per-stream `fileno' function to convert the
6028 stream's cookie into an integral file descriptor.
6030 * ``malloc (0)'' no longer returns a null pointer. Instead, it
6031 allocates zero bytes of storage, and returns a unique pointer which
6032 you can pass to `realloc' or `free'. The behavior is undefined if
6033 you dereference this pointer.
6035 * The C library now runs on Sony NEWS m68k machines running either
6036 NewsOS 3 or NewsOS 4.
6038 * The new `syscall' function is a system-dependent primitive function
6039 for invoking system calls. It has the canonical behavior on Unix
6040 systems, including unreliable return values for some calls (such as
6041 `pipe', `fork' and `getppid').
6043 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
6044 to `EAGAIN', which is the preferred name. On systems whose kernels
6045 use two distinct codes, the C library now translates EWOULDBLOCK to
6046 EAGAIN in every system call function.
6050 * The GNU C Library Reference Manual is now distributed with the library.
6051 `make dvi' will produce a DVI file of the printed manual.
6052 `make info' will produce Info files that you can read on line using C-h i
6053 in Emacs or the `info' program.
6054 Please send comments on the manual to bug-glibc-manual@gnu.org.
6056 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
6058 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
6060 * Jason Merrill has contributed a port to the Sequent Symmetry running
6061 Dynix version 3 (i386-sequent-dynix).
6063 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
6064 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
6066 * New function `memory_warnings' lets you arrange to get warnings when
6067 malloc is running out of memory to allocate, like Emacs gives you.
6069 * The C library now contains the relocating allocator used in Emacs 19 for
6070 its editing buffers. This allocator (ralloc) minimizes allocation
6071 overhead and fragmentation by moving allocated regions around whenever it
6072 needs to. You always refer to a ralloc'd region with a "handle" (a
6073 pointer to a pointer--an object of type `void **').
6075 * There is a new `printf' format: `%m' gives you the string corresponding
6076 to the error code in `errno'.
6078 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
6079 or `%[' conversion, but instead of filling in a fixed-sized buffer you
6080 pass, the `a' modifier says to fill in a `char **' you pass with a
6083 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
6084 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
6085 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
6087 * `mkstemp' is a traditional Unix function to atomically create and open a
6088 uniquely-named temporary file.
6092 * The standard location for the file that says what the local timezone is
6093 has changed again. It is now `/usr/local/etc/localtime' (or more
6094 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
6096 * The distribution no longer contains any files with names longer than 14
6099 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
6100 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
6102 * New functions `ttyslot' and `syslog' from 4.4 BSD.
6106 * The configuration process has changed quite a bit. The `configure'
6107 script is now used just like the configuration scripts for other GNU
6108 packages. The `sysdeps' directory hierarchy is much rearranged.
6109 The file `INSTALL' explains the new scheme in detail.
6111 * The header files no longer need to be processed into ANSI C and
6112 traditional C versions. There is just one set of files to install, and
6113 it will work with ANSI or old C compilers (including `gcc -traditional').
6115 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
6116 MIPS DECStation running Ultrix 4.
6118 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
6119 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
6120 made itself into a shared library.
6122 * Yet further improved support for the i386, running 4.3 BSD-like systems
6123 (such as Mach 3 with the Unix single-server), or System V.
6125 * New function `strncasecmp' to do case-insensitive string comparison
6126 with limited length.
6128 * New function `strsep' is a reentrant alternative to `strtok'.
6130 * New functions `scandir' and `alphasort' for searching directories.
6132 * New function `setenv' is a better interface to `putenv'.
6134 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
6135 function for traversing a directory tree.
6137 * The GNU obstack package is now also part of the C library.
6138 The new function `open_obstack_stream' creates a stdio stream that
6139 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
6140 formatted output directly to an obstack.
6142 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
6143 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
6145 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
6147 * The new functions `strfry' and `memfrob' do mysterious and wonderful
6148 things to your strings.
6150 * There are some new test programs: test-fseek, testmb, and testrand.
6152 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
6153 These ports are not finished, but are a good starting place for really
6154 supporting those systems.
6156 * `/etc/localtime' is now the standard location for the file that says what
6157 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
6158 This follows the general principle that `/etc' is the place for all local
6159 configuration files.
6161 * The C library header files now use `extern "C"' when used by the C++
6162 compiler, so the C library should now work with C++ code.
6164 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
6165 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
6168 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
6169 function which uses the `merge sort' algorithm, and is said to be
6170 significantly faster than the old GNU `qsort' function. Merge sort is
6171 now the standard `qsort' function. The new algorithm can require a lot
6172 of temporary storage; so, the old sorting function is called when the
6173 required storage is not available.
6175 * The C library now includes Michael Glad's Ultra Fast Crypt, which
6176 provides the Unix `crypt' function, plus some other entry points.
6178 * The code and header files taken from 4.4 BSD have been updated with the
6179 latest files released from Berkeley.
6181 ----------------------------------------------------------------------
6182 Copyright information:
6184 Copyright (C) 1992-2020 Free Software Foundation, Inc.
6186 Permission is granted to anyone to make or distribute verbatim copies
6187 of this document as received, in any medium, provided that the
6188 copyright notice and this permission notice are preserved,
6189 thus giving the recipient permission to redistribute in turn.
6191 Permission is granted to distribute modified versions
6192 of this document, or of portions of it,
6193 under the above conditions, provided also that they
6194 carry prominent notices stating who last changed them.
6197 version-control: never