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 dynamic linker accepts the --argv0 argument and provides opportunity
13 to change argv[0] string.
15 * The mallinfo2 function is added to report statistics as per mallinfo,
16 but with larger field widths to accurately report values that are
17 larger than fit in an integer.
19 * Add <sys/platform/x86.h> to provide query macros for x86 CPU features.
21 * Support for the RISC-V ISA running on Linux has been expanded to run on
22 32-bit hardware. This is supported for the following ISA and ABI pairs:
28 The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils
31 Deprecated and removed features, and other changes affecting compatibility:
33 * The mallinfo function is marked deprecated. Callers should call
36 * When dlopen is used in statically linked programs, alternative library
37 implementations from HWCAP subdirectories are no longer loaded.
38 Instead, the default implementation is used.
40 * The deprecated <sys/vtimes.h> header and the function vtimes have been
41 removed. To support old binaries, the vtimes function continues to exist
42 as a compatibility symbol. Applications should use the getrlimit or
45 Changes to build and runtime requirements:
47 * On Linux, the system administrator needs to configure /dev/pts with
48 the intended access modes for pseudo-terminals. glibc no longer
49 attemps to adjust permissions of terminal devices. The previous glibc
50 defaults ("tty" group, user read/write and group write) already
51 corresponded to what most systems used, so that grantpt did not
52 perform any adjustments.
54 * On Linux, the posix_openpt and getpt functions no longer attempt to
55 use legacy (BSD) pseudo-terminals and assume that if /dev/ptmx exists
56 (and pseudo-terminals are supported), a devpts file system is mounted
57 on /dev/pts. Current systems already meet these requirements.
59 Security related changes:
61 [Add security related changes here]
63 The following bugs are resolved with this release:
65 [The release manager will add the list generated by
66 scripts/list-fixed-bugs.py just before the release.]
73 * Unicode 13.0.0 Support: Character encoding, character type info, and
74 transliteration tables are all updated to Unicode 13.0.0, using
75 generator scripts contributed by Mike FABIAN (Red Hat).
77 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
79 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
80 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
81 Three ABIs are supported:
87 The arc* ABI is little-endian while arceb is big-endian. All ABIs use
88 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
90 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
91 DT_DEPAUDIT dynamic section entries of the main executable.
93 * powerpc64le supports IEEE128 long double libm/libc redirects when
94 using the -mabi=ieeelongdouble to compile C code on supported GCC
95 toolchains. It is recommended to use GCC 8 or newer when testing
98 * To help detect buffer overflows and other out-of-bounds accesses
99 several APIs have been annotated with GCC 'access' attribute. This
100 should help GCC 10 issue better warnings.
102 * On Linux, functions the pthread_attr_setsigmask_np and
103 pthread_attr_getsigmask_np have been added. They allow applications
104 to specify the signal mask of a thread created with pthread_create.
106 * The GNU C Library now provides the header file <sys/single_threaded.h>
107 which declares the variable __libc_single_threaded. Applications are
108 encouraged to use this variable for single-thread optimizations,
109 instead of weak references to symbols historically defined in
112 * The functions sigabbrev_np and sigdescr_np have been added. The
113 sigabbrev_np returns the abbreviated signal name (e.g. "HUP" for SIGHUP)
114 while sigdescr_np returns a string describing the signal number (e.g
115 "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
116 attempt to translate the return description, both functions return
117 NULL for an invalid signal number.
119 They should be used instead of sys_siglist or sys_sigabbrev and they
120 are both thread and async-signal safe. These functions are GNU extensions.
122 * The functions strerrorname_np and strerrordesc_np have been added. The
123 strerroname_np returns error number name (e.g. "EINVAL" for EINVAL) while
124 strerrordesc_np returns string describing error number
125 (e.g "Invalid argument" for EINVAL). Different than strerror,
126 strerrordesc_np does not attempt to translate the return description, both
127 functions return NULL for an invalid error number.
129 They should be used instead of sys_errlist and sys_nerr, both are
130 thread and async-signal safe. These functions are GNU extensions.
132 * AArch64 now supports standard branch protection security hardening
133 in glibc when it is built with a GCC that is configured with
134 --enable-standard-branch-protection (or if -mbranch-protection=standard
135 flag is passed when building both GCC target libraries and glibc,
136 in either case a custom GCC is needed). This includes branch target
137 identification (BTI) and pointer authentication for return addresses
138 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
139 extensions respectively for the protection to be effective,
140 otherwise the used instructions are nops. User code can use PAC-RET
141 without libc support, but BTI requires a libc that is built with BTI
142 support, otherwise runtime objects linked into user code will not be
145 Deprecated and removed features, and other changes affecting compatibility:
147 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
148 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
149 RPC header files. Backward compatibility for old programs is kept
150 only for architectures and ABIs that have been added in or before
151 glibc 2.31. New programs need to use TI-RPC
152 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
153 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
155 * Remove configure option --enable-obsolete-nsl. libnsl is only built
156 as shared library for backward compatibility and the NSS modules "nis"
157 and "nisplus" are not built at all and libnsl's headers aren't
158 installed. This compatibility is kept only for architectures and ABIs
159 that have been added in or before version 2.28. Replacement
160 implementations based on TI-RPC, which additionally support IPv6, are
161 available from <https://github.com/thkukuk/>. This change does not
162 affect the "compat" NSS module, which does not depended on libnsl
163 since 2.27 and thus can be used without NIS.
165 * The deprecated <sys/sysctl.h> header and the sysctl function have been
166 removed. To support old binaries, the sysctl function continues to
167 exist as a compatibility symbol (on those architectures which had it),
168 but always fails with ENOSYS. This reflects the removal of the system
169 call from all architectures, starting with Linux 5.5.
171 * The sstk function is no longer available to newly linked binaries.
172 Its implementation always returned with a failure, and the function
173 was not declared in any header file.
175 * The legacy signal handling functions siginterrupt, sigpause, sighold,
176 sigrelse, sigignore and sigset, and the sigmask macro have been
177 deprecated. Applications should use the sigsuspend, sigprocmask and
178 sigaction functions instead.
180 * ldconfig now defaults to the new format for ld.so.cache. glibc has
181 already supported this format for almost 20 years.
183 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
184 are no longer available to newly linked binaries, and their declarations
185 have been removed from <string.h>. They are exported solely as
186 compatibility symbols to support old binaries. All programs should use
189 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
190 are no longer available to newly linked binaries, and their declarations
191 have been removed from from <stdio.h>. They are exported solely as
192 compatibility symbols to support old binaries. All programs should use
193 strerror or strerror_r instead.
195 * Both strerror and strerror_l now share the same internal buffer in the
196 calling thread, meaning that the returned string pointer may be invalided
197 or contents might be overwritten on subsequent calls in the same thread or
198 if the thread is terminated. It makes strerror MT-safe.
200 * Using weak references to libpthread functions such as pthread_create
201 or pthread_key_create to detect the singled-threaded nature of a
202 program is an obsolescent feature. Future versions of glibc will
203 define pthread_create within libc.so.6 itself, so such checks will
204 always flag the program as multi-threaded. Applications should check
205 the __libc_single_threaded variable declared in
206 <sys/single_threaded.h> instead.
208 * The "files" NSS module no longer supports the "key" database (used for
209 secure RPC). The contents of the /etc/publickey file will be ignored,
210 regardless of the settings in /etc/nsswitch.conf. (This method of
211 storing RPC keys only supported the obsolete and insecure AUTH_DES
212 flavor of secure RPC.)
214 * The __morecore and __after_morecore_hook malloc hooks and the default
215 implementation __default_morecore have been deprecated. Applications
216 should use malloc interposition to change malloc behavior, and mmap to
217 allocate anonymous memory. A future version of glibc may require that
218 applications which use the malloc hooks must preload a special shared
219 object, to enable the hooks.
221 * The hesiod NSS module has been deprecated and will be removed in a
222 future version of glibc. System administrators are encouraged to
223 switch to other approaches for networked account databases, such as
226 Changes to build and runtime requirements:
228 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
229 long double redirects.
231 Security related changes:
233 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
234 invoked with the -c option and when processing invalid multi-byte input
235 sequences. Reported by Jan Engelhardt.
237 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
238 corruption when they were passed a pseudo-zero argument. Reported by Guido
239 Vranken / ForAllSecure Mayhem.
241 CVE-2020-1752: A use-after-free vulnerability in the glob function when
242 expanding ~user has been fixed.
244 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
245 memmove functions has been fixed. Discovered by Jason Royes and Samual
246 Dytrych of the Cisco Security Assessment and Penetration Team (See
249 The following bugs are resolved with this release:
251 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
252 [10441] manual: Backtraces code example lacks error checking
253 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
254 timer_sigev_thread dangerous
255 [14231] stdio: stdio-common tests memory requirements
256 [14578] libc: /proc-based emulation for lchmod, fchmodat
257 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
258 filtee has constructor
259 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
260 sequences (CVE-2016-10228)
261 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
262 character entities for infinity & pi
263 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
264 segfaults in applications
265 [20543] libc: Please move from .gnu.linkonce to comdat
266 [22489] network: gcc warns about implicit convertion in
267 ICMP6_FILTER_SETPASS with -Wsign-conversion
268 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
269 [23294] math: Complex _FloatN functions are redirected to the wrong
270 function with -mlong-double-64
271 [23296] libc: Data race in setting function descriptor during lazy
273 [23668] dynamic-link: ldconfig: Default to the new format for
275 [23819] hurd: hurd: Add C11 thread support
276 [23990] build: test-container error out on failure to exec child.
277 [23991] build: shell-container typo in run_command_array
278 [24638] manual: Error in example of parsing a template string
279 [24654] manual: Wrong declaration of wcschr in libc manual
280 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
282 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
283 dynamically loaded dsos
284 [25098] nptl: nptl: ctype classification functions are not AS-Safe
285 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
287 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
288 restore EAX, ECX and EDX
289 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
290 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
291 [25420] network: Race condition in resolv_conf.c can result in caching
292 stale configuration forever
293 [25487] math: sinl() stack corruption from crafted input
295 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
297 [25523] libc: MIPS/Linux inline syscall template is miscompiled
298 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
300 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
301 on 32 bit and old kernel
302 [25635] libc: arm: Wrong sysdep order selection for soft-fp
303 [25639] localedata: Some names of days and months wrongly spelt in
305 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
306 amount of sigset_t bytes
307 [25691] stdio: printf: memory leak when printing long multibyte
309 [25715] libc: system() returns wrong errors when posix_spawn fails
310 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
311 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
312 state for conversions that produce two Unicode code points
313 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
314 for linux x86_64 leads to livelock
315 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
316 test failures, invalid instruction in ld.so
317 [25790] glob: Typo in tst-fnmatch.input
318 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
320 [25819] localedata: Update locale data to Unicode 13.0.0
321 [25824] libc: Abnormal function of strnlen in aarch64
322 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
323 [25896] libc: Incorrect prctl
324 [25902] libc: Bad LOADARGS_N
325 [25905] dynamic-link: VSX registers are corrupted during PLT
326 resolution when glibc is built with --disable-multi-arch and --with-
328 [25933] string: Off by one error in __strncmp_avx2 when
329 length=VEC_SIZE*4 and strings are at page boundaries can cause a
331 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
332 exiting detached thread
333 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
335 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
337 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
338 [26073] math: getpayload() has wrong return value
339 [26076] dynamic-link: dlmopen crashes after failing to load
340 dependencies in audit mode
341 [26120] localedata: column width of of some Korean
342 JUNGSEONG/JONGSEONG characters wrong (should be 0)
343 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
344 [26133] libc: Incorrect need_arch_feature_F16C
345 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
347 [26149] libc: PKU is usable only if OSPKE is set
348 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
350 [26208] libc: Incorrect bit_cpu_CLFSH
351 [26210] network: Incorrect use of hidden symbols for global sunrpc
353 [26211] stdio: printf integer overflow calculating allocation size
354 [26214] stdio: printf_fp double free
355 [26215] stdio: printf_fp memory leak
356 [26232] time: FAIL: support/tst-timespec for 32-bit targets
357 [26258] nss: nss_compat should not read input files with mmap
358 [26332] string: Incorrect cache line size load causes memory
366 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
367 enable features from the draft ISO C2X standard. Only some features from
368 this draft standard are supported by the GNU C Library, and as the draft
369 is under active development, the set of features enabled by this macro is
370 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
371 by compiling with "gcc -std=gnu2x".
373 * The <math.h> functions that round their results to a narrower type now
374 have corresponding type-generic macros in <tgmath.h>, as defined in TS
375 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
376 Clarification Request 13 to TS 18661-3.
378 * The function pthread_clockjoin_np has been added, enabling join with a
379 terminated thread with a specific clock. It allows waiting against
380 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
382 * New locale added: mnw_MM (Mon language spoken in Myanmar).
384 * The DNS stub resolver will optionally send the AD (authenticated data) bit
385 in queries if the trust-ad option is set via the options directive in
386 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
387 mode, the AD bit, as provided by the name server, is available to
388 applications which call res_search and related functions. In the default
389 mode, the AD bit is not set in queries, and it is automatically cleared in
390 responses, indicating a lack of DNSSEC validation. (Therefore, the name
391 servers and the network path to them are treated as untrusted.)
393 Deprecated and removed features, and other changes affecting compatibility:
395 * The totalorder and totalordermag functions, and the corresponding
396 functions for other floating-point types, now take pointer arguments to
397 avoid signaling NaNs possibly being converted to quiet NaNs in argument
398 passing. This is in accordance with the resolution of Clarification
399 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
400 floating-point arguments directly will continue to work.
402 * The obsolete function stime is no longer available to newly linked
403 binaries, and its declaration has been removed from <time.h>.
404 Programs that set the system time should use clock_settime instead.
406 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
407 in a future version of glibc. In this release, the header still exists
408 but calling ftime will cause a compiler warning. All programs should use
409 gettimeofday or clock_gettime instead.
411 * The gettimeofday function no longer reports information about a
412 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
413 many years, as it cannot handle the full complexity of the world's
414 timezones, but hitherto we have supported it on a best-effort basis.
415 Changes required to support 64-bit time_t on 32-bit architectures have
416 made this no longer practical.
418 As of this release, callers of gettimeofday with a non-null 'tzp' argument
419 should expect to receive a 'struct timezone' whose tz_minuteswest and
420 tz_dsttime fields are zero. (For efficiency reasons, this does not always
421 happen on a few Linux-based ports. This will be corrected in a future
424 All callers should supply a null pointer for the 'tzp' argument to
425 gettimeofday. For accurate information about the time zone associated
426 with the current time, use the localtime function.
428 gettimeofday itself is obsolescent according to POSIX. We have no plans
429 to remove access to this function, but portable programs should consider
430 using clock_gettime instead.
432 * The settimeofday function can still be used to set a system-wide time
433 zone when the operating system supports it. This is because the Linux
434 kernel reused the API, on some architectures, to describe a system-wide
435 time-zone-like offset between the software clock maintained by the kernel,
436 and the "RTC" clock that keeps time when the system is shut down.
438 However, to reduce the odds of this offset being set by accident,
439 settimeofday can no longer be used to set the time and the offset
440 simultaneously. If both of its two arguments are non-null, the call
441 will fail (setting errno to EINVAL).
443 Callers attempting to set this offset should also be prepared for the call
444 to fail and set errno to ENOSYS; this already happens on the Hurd and on
445 some Linux architectures. The Linux kernel maintainers are discussing a
446 more principled replacement for the reused API. After a replacement
447 becomes available, we will change settimeofday to fail with ENOSYS on all
448 platforms when its 'tzp' argument is not a null pointer.
450 settimeofday itself is obsolescent according to POSIX. Programs that set
451 the system time should use clock_settime and/or the adjtime family of
452 functions instead. We may cease to make settimeofday available to newly
453 linked binaries after there is a replacement for Linux's time-zone-like
456 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
457 the optional CAS instruction is implemented (for instance, LEON processors
458 are still supported, but SuperSPARC processors are not).
460 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
463 * If a lazy binding failure happens during dlopen, during the execution of
464 an ELF constructor, the process is now terminated. Previously, the
465 dynamic loader would return NULL from dlopen, with the lazy binding error
466 captured in a dlerror message. In general, this is unsafe because
467 resetting the stack in an arbitrary function call is not possible.
469 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
470 executable stack unless explicitly configured at build time to require
471 minimum kernel version 4.8 or newer. This is because executing
472 floating-point branches on a non-executable stack on Linux kernels prior to
473 4.8 can lead to application crashes for some MIPS configurations. While
474 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
475 expected to enable non-executable stack by default with PT_GNU_STACK by
476 default and is thus likely to trigger a crash on older kernels.
478 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
479 non-executable stack while dropping support for older kernels.
481 * System call wrappers for time system calls now use the new time64 system
482 calls when available. On 32-bit targets, these wrappers attempt to call
483 the new system calls first and fall back to the older 32-bit time system
484 calls if they are not present. This may cause issues in environments
485 that cannot handle unsupported system calls gracefully by returning
486 -ENOSYS. Seccomp sandboxes are affected by this issue.
488 Changes to build and runtime requirements:
490 * It is no longer necessary to have recent Linux kernel headers to build
491 working (non-stub) system call wrappers on all architectures except 64-bit
492 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
494 * The ChangeLog file is no longer present in the toplevel directory of the
495 source tree. ChangeLog files are located in the ChangeLog.old directory as
496 ChangeLog.N where the highest N has the latest entries.
498 Security related changes:
500 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
501 out-of-bounds write when executed in a signal frame context.
503 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
504 environment variable during program execution after a security
505 transition, allowing local attackers to restrict the possible mapping
506 addresses for loaded libraries and thus bypass ASLR for a setuid
507 program. Reported by Marcin Kościelnicki.
509 The following bugs are resolved with this release:
511 [12031] localedata: iconv -t ascii//translit with Greek characters
512 [15813] libc: Multiple issues in __gen_tempname
513 [17726] libc: [arm, sparc] profil_counter should be compat symbol
514 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
515 [19767] libc: vdso is not used with static linking
516 [19903] hurd: Shared mappings not being inherited by children processes
517 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
518 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
520 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
521 Symbols-A/B Unicode blocks
522 [23518] libc: Eliminate __libc_utmp_jump_table
523 [24026] malloc: malloc_info() returns wrong numbers
524 [24054] localedata: Many locales are missing date_fmt
525 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
526 [24304] dynamic-link: Lazy binding failure during ELF
527 constructors/destructors is not fatal
528 [24376] libc: RISC-V symbol size confusion with _start
529 [24682] localedata: zh_CN first weekday should be Monday per GB/T
531 [24824] libc: test-in-container does not install charmap files compatible
533 [24844] regex: regex bad pointer / leakage if malloc fails
534 [24867] malloc: Unintended malloc_info formatting changes
535 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
536 [24880] libc: login: utmp implementation uses struct flock with fcntl64
537 [24882] libc: login: pututline uses potentially outdated cache
538 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
539 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
541 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
543 [24930] dynamic-link: dlopen of PIE executable can result in
544 _dl_allocate_tls_init assertion failure
545 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
546 (stringop-overflow error)
547 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
548 functions other can lead to crashes
549 [24967] libc: jemalloc static linking causes runtime failure
550 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
552 [25035] libc: sbrk() failure handled poorly in tunables_strdup
553 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
554 [25097] libc: new -Warray-bounds with GCC 10
555 [25112] dynamic-link: dlopen must not make new objects accessible when it
556 still can fail with an error
557 [25139] localedata: Please add the new mnw_MM locale
558 [25149] regex: Array bounds violation in proceed_next_node
559 [25157] dynamic-link: Audit cookie for the dynamic loader is not
560 initialized correctly
561 [25189] libc: glibc's __glibc_has_include causes issues with clang
563 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
565 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
566 binaries (CVE-2019-19126)
567 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
569 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
571 [25232] string: <string.h> does not enable const correctness for strchr et
573 [25233] localedata: Consider "." as the thousands separator for sl_SI
575 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
576 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
577 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
579 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
580 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
582 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
583 (dl_initfirst) link map pointer
584 [25401] malloc: pvalloc must not have __attribute_alloc_size__
585 [25423] libc: Array overflow in backtrace on powerpc
586 [25425] network: Missing call to __resolv_context_put in
587 getaddrinfo.c:gethosts
594 * Unicode 12.1.0 Support: Character encoding, character type info, and
595 transliteration tables are all updated to Unicode 12.1.0, using
596 generator scripts contributed by Mike FABIAN (Red Hat).
598 * The dynamic linker accepts the --preload argument to preload shared
599 objects, in addition to the LD_PRELOAD environment variable.
601 * The twalk_r function has been added. It is similar to the existing
602 twalk function, but it passes an additional caller-supplied argument
603 to the callback function.
605 * On Linux, the getdents64, gettid, and tgkill functions have been added.
607 * Minguo (Republic of China) calendar support has been added as an
608 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
611 * The entry for the new Japanese era has been added for ja_JP locale.
613 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
614 pvalloc, memalign, and posix_memalign fail now with total object size
615 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
616 pointer subtraction within the allocated object, where results might
617 overflow the ptrdiff_t type.
619 * The dynamic linker no longer refuses to load objects which reference
620 versioned symbols whose implementation has moved to a different soname
621 since the object has been linked. The old error message, symbol
622 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
623 link time reference, is gone.
625 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
626 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
627 functions. These behave similarly to their "timed" equivalents, but also
628 accept a clockid_t parameter to determine which clock their timeout should
629 be measured against. All functions allow waiting against CLOCK_MONOTONIC
630 and CLOCK_REALTIME. The decision of which clock to be used is made at the
631 time of the wait (unlike with pthread_condattr_setclock, which requires
632 the clock choice at initialization time).
634 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
635 work, new resolvers can use a second argument which can be extended in
636 the future, currently it contains the AT_HWCAP2 value.
638 Deprecated and removed features, and other changes affecting compatibility:
640 * The copy_file_range function fails with ENOSYS if the kernel does not
641 support the system call of the same name. Previously, user space
642 emulation was performed, but its behavior did not match the kernel
643 behavior, which was deemed too confusing. Applications which use the
644 copy_file_range function can no longer rely on glibc to provide a fallback
645 on kernels that do not support the copy_file_range system call, and if
646 this function returns ENOSYS, they will need to use their own fallback.
647 Support for copy_file_range for most architectures was added in version
648 4.5 of the mainline Linux kernel.
650 * The functions clock_gettime, clock_getres, clock_settime,
651 clock_getcpuclockid, clock_nanosleep were removed from the librt library
652 for new applications (on architectures which had them). Instead, the
653 definitions in libc will be used automatically, which have been available
656 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
657 and <sys/stropts.h> have been removed.
659 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
660 resolver flag (deprecated in glibc 2.25) have been removed.
662 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
663 resolver have been removed from <resolv.h>.
665 * With --enable-bind-now, installed programs are now linked with the
668 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
669 configurations) has been removed, following the deprecation of this
670 subarchitecture in version 8 of GCC, and its removal in version 9.
672 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
673 header have been removed.
675 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
676 deprecated and will be removed from a future version of glibc.
677 Application should directly access /proc instead. For obtaining random
678 bits, the getentropy function can be used.
680 Changes to build and runtime requirements:
682 * GCC 6.2 or later is required to build the GNU C Library.
684 Older GCC versions and non-GNU compilers are still supported when
685 compiling programs that use the GNU C Library.
687 Security related changes:
689 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
690 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
691 has undefined behavior. On x32, the size_t argument may be passed
692 in the lower 32 bits of the 64-bit RDX register with non-zero upper
693 32 bits. When it happened with the sign bit of RDX register set,
694 memcmp gave the wrong result since it treated the size argument as
695 zero. Reported by H.J. Lu.
697 CVE-2019-9169: Attempted case-insensitive regular-expression match
698 via proceed_next_node in posix/regexec.c leads to heap-based buffer
699 over-read. Reported by Hongxu Chen.
701 The following bugs are resolved with this release:
703 [2872] locale: Transliteration Cyrillic -> ASCII fails
704 [6399] libc: gettid() should have a wrapper
705 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
706 [16976] glob: fnmatch unbounded stack VLA for collating symbols
707 [17396] localedata: globbing for locale by [[.collating-element.]]
708 [18035] dynamic-link: pldd does no longer work, enters infinite loop
709 [18465] malloc: memusagestat is built using system C library
710 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
711 invalid input drops valid char
712 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
713 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
714 [21897] localedata: Afar locales: Fix mon, abmon, and abday
715 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
716 [23352] malloc: __malloc_check_init still defined in public header
718 [23403] nptl: Wrong alignment of TLS variables
719 [23501] libc: nftw() doesn't return dangling symlink's inode
720 [23733] malloc: Check the count before calling tcache_get()
721 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
723 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
724 [23844] nptl: pthread_rwlock_trywrlock results in hang
725 [23983] argparse: Missing compat versions of argp_failure and argp_error
726 for long double = double
727 [23984] libc: Missing compat versions of err.h and error.h functions for
729 [23996] localedata: Dutch salutations
730 [24040] libc: riscv64: unterminated call chain in __thread_start
731 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
733 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
734 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
736 [24114] regex: regexec buffer read overrun in "grep -i
737 '\(\(\)*.\)*\(\)\(\)\1'"
738 [24122] libc: Segfaults if 0 returned from la_version
739 [24153] stdio: Some input functions do not react to stdin assignment
740 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
741 RDX is set) (CVE-2019-7309)
742 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
743 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
744 not the default "nor"
745 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
746 false positives, change to modern flexible array
747 [24180] nptl: pthread_mutex_trylock does not use the correct order of
748 instructions while maintaining the robust mutex list due to missing
750 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
751 unnecessary librt dependencies
752 [24200] localedata: Revert first_weekday removal in en_IE locale
753 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
754 [24215] nptl: pthread_timedjoin_np should be a cancellation point
755 [24216] malloc: Check for large bin list corruption when inserting
757 [24228] stdio: old x86 applications that use legacy libio crash on exit
758 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
760 [24293] localedata: Missing Minguo calendar support for TW locales
761 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
763 [24307] localedata: Update locale data to Unicode 12.0.0
764 [24323] dynamic-link: dlopen should not be able open PIE objects
765 [24335] build: "Obsolete types detected" with Linux 5.0 headers
766 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
768 [24370] localedata: Add lang_name for tt_RU locale
769 [24372] locale: Binary locale files are not architecture independent
770 [24394] time: strptime %Ey mis-parses final year of era
771 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
773 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
775 [24531] malloc: Malloc tunables give tcache assertion failures
776 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
778 [24535] localedata: Update locale data to Unicode 12.1.0
779 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
780 kernels and break testing
781 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
782 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
783 [-Werror=format-overflow=]
784 [24570] libc: alpha: compat msgctl uses __IPC_64
785 [24584] locale: Data race in __wcsmbs_clone_conv
786 [24588] stdio: Remove codecvt vtables from libio
787 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
789 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
790 [24632] stdio: Old binaries which use freopen with default stdio handles
792 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
794 [24652] localedata: szl_PL spelling correction
795 [24695] nss: nss_db: calling getpwent after endpwent crashes
796 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
797 in /etc/nsswitch.conf
798 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
799 [24740] libc: getdents64 type confusion
800 [24741] dynamic-link: ld.so should not require that a versioned symbol is
801 always implemented in the same library
802 [24744] libc: Remove copy_file_range emulation
803 [24757] malloc: memusagestat is linked against system libpthread
804 [24794] libc: Partial test suite run builds corrupt test-in-container
812 * The getcpu wrapper function has been added, which returns the currently
813 used CPU and NUMA node. This function is Linux-specific.
815 * A new convenience target has been added for distribution maintainers
816 to build and install all locales as directories with files. The new
817 target is run by issuing the following command in your build tree:
818 'make localedata/install-locale-files', with an optional DESTDIR
819 to set the install root if you wish to install into a non-default
822 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
824 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
825 for _GNU_SOURCE, to match BSD environments.
827 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
828 indicates that it will abort the transaction prior to entering the kernel
829 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
830 suspended, and this caused some undefined side-effects issues by aborting
831 transactions manually. Glibc avoided it by abort transactions manually on
832 each syscall, but it lead to performance issues on newer kernels where the
833 HTM state is saved and restore lazily (the state being saved even when the
834 process actually does not use HTM).
836 * The functions posix_spawn_file_actions_addchdir_np and
837 posix_spawn_file_actions_addfchdir_np have been added, enabling
838 posix_spawn and posix_spawnp to run the new process in a different
839 directory. These functions are GNU extensions. The function
840 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
843 * The popen and system do not run atfork handlers anymore (BZ#17490).
844 Although it is a possible POSIX violation, the POSIX rationale in
845 pthread_atfork documentation regarding atfork handlers is to handle
846 inconsistent mutex state after a fork call in a multi-threaded process.
847 In both popen and system there is no direct access to user-defined mutexes.
849 * Support for the C-SKY ABIV2 running on Linux has been added. This port
850 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
852 - C-SKY ABIV2 soft-float little-endian
853 - C-SKY ABIV2 hard-float little-endian
855 * strftime's default formatting of a locale's alternative year (%Ey)
856 has been changed to zero-pad the year to a minimum of two digits,
857 like "%y". This improves the display of Japanese era years during
858 the first nine years of a new era, and is expected to be harmless
859 for all other locales (only Japanese locales regularly have
860 alternative year numbers less than 10). Zero-padding can be
861 overridden with the '_' or '-' flags (which are GNU extensions).
863 * As a GNU extension, the '_' and '-' flags can now be applied to
864 "%EY" to control how the year number is formatted; they have the
865 same effect that they would on "%Ey".
867 Deprecated and removed features, and other changes affecting compatibility:
869 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
870 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
872 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
873 in <sys/procfs.h>, has been corrected to match the type actually used by
874 the Linux kernel. This affects the size and layout of that structure on
875 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
877 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
878 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
879 defined in <sys/procfs.h>, has been corrected to match the type actually
880 used by the Linux kernel. This affects the size and layout of those
883 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
884 meant to scan a string and allocate space for it with malloc, is now
885 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
886 defined. This extension conflicts with C99's use of '%a' to scan a
887 hexadecimal floating-point number, which is now available to programs
888 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
890 POSIX.1-2008 includes the feature of allocating a buffer for string input
891 with malloc, using the modifier letter 'm' instead. Programs using
892 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
893 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
894 C99 '%a' no longer need to avoid _GNU_SOURCE.
896 GCC's -Wformat warnings can detect most uses of this extension, as long
897 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
898 __attribute__ ((format (scanf, ...))).
900 Changes to build and runtime requirements:
902 * Python 3.4 or later is required to build the GNU C Library.
904 * On most architectures, GCC 5 or later is required to build the GNU C
905 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
907 Older GCC versions and non-GNU compilers are still supported when
908 compiling programs that use the GNU C Library.
910 Security related changes:
912 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
913 denial of service due to resource exhaustion when processing getaddrinfo
914 calls with crafted host names. Reported by Guido Vranken.
916 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
917 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
918 happened, accessing the 32-bit size_t value as the full 64-bit register
919 in the assembly string/memory functions would cause a buffer overflow.
922 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
923 addresses with arbitrary trailing characters, potentially leading to data
924 or command injection issues in applications.
926 The following bugs are resolved with this release:
928 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
929 [10496] localedata: 12h time representation in multiple locales faulty
930 [10797] localedata: it_IT locale numeric does not have a separator for
932 [11319] libc: dprintf doesn't handle errors properly
933 [16346] time: mktime: potentially unsafe use of localtime_offset
934 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
936 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
937 posix_spawn_file_actions_addfchdir_np
938 [17426] localedata: Indian locales: set the correct date format
939 [17490] stdio: popen should not invoke atfork handlers
940 [17783] libc: TIOCSER_TEMT conditions inconsistent
941 [18040] regex: use-after-free in regexec/get_subexp
942 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
943 [20018] network: getaddrinfo should reject IP addresses with trailing
944 characters (CVE-2016-10739)
945 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
946 [20271] libc: Missing "\n" in __libc_fatal calls
947 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
948 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
949 pointer argument is non-NULL
950 [21037] stdio: open_memstream and freopen
951 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
952 [21716] time: Crash in glibc's mktime in low-memory situations
953 [22834] stdio: Subprocess forked by popen may crash in Linux when
954 multithreads call popen
955 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
956 and pthread_create fails.
957 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
958 [23125] libc: riscv64: endless loop when throwing an exception from a
960 [23275] nptl: Race in pthread_mutex_lock while promoting to
961 PTHREAD_MUTEX_ELISION_NP.
962 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
964 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
966 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
968 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
969 [23509] dynamic-link: CET enabled glibc is incompatible with the older
971 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
972 [23521] nss: get_next_alias nss_files file stream leak
973 [23538] nptl: Hang in pthread_cond_broadcast
974 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
975 [23578] regex: Invalid memory access if regex pattern contains NUL byte
976 [23579] libc: Errors misreported in preadv2
977 [23597] build: support/test-container.c doesn't work with different
979 [23603] time: mktime signed integer overflow on large timestamps
980 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
981 [23614] libc: powerpc: missing CFI register information in __mpn_*
983 [23637] string: Generic strstr/strcasestr fails with huge needles
984 [23640] libc: no way to easily clear FD_CLOEXEC in
985 posix_spawn_file_actions_adddup2()
986 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
988 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
990 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
991 [23689] libc: Bug in documentation for rusage.ru_ixrss in
992 bits/types/struct_rusage.h
993 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
995 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
997 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
998 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
999 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
1001 [23724] localedata: Albanian date formats are incorrect
1002 [23735] math: libnldbl_nonshared.a references internal libm symbols
1003 [23740] localedata: kl_GL: Month names and date formats need update
1004 [23744] regex: regex refactorings to remove BE, avoid duplication
1005 [23745] time: mktime fix for Gnulib + coreutils
1006 [23758] time: Improve the width of alternate representation for year in
1008 [23783] libc: [mips] Missing CMSPAR bits/termios.h
1009 [23789] time: mktime does not set errno on failure
1010 [23791] localedata: Wrong monetary format for ca_ES locale
1011 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
1012 [23794] locale: c16rtomb does not handle surrogate pairs
1013 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
1014 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
1015 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
1016 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
1017 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
1018 [23862] libc: [sh] missing kernel-features.h undefines
1019 [23864] libc: [riscv] missing kernel-features.h undefines
1020 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
1021 [23907] malloc: Incorrect double-free malloc tcache check disregards
1023 [23913] libc: off-by-one in function maybe_script_execute in
1024 sysdeps/posix/spawni.c
1025 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
1026 [23923] locale: Add --no-hard-links option to localedef
1027 [23927] network: Linux if_nametoindex() does not close descriptor
1029 [23961] math: powf can overflow to inf without setting errno in non-
1030 nearest rounding mode
1031 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
1032 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
1033 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
1034 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
1035 [24011] localedata: Fixed small type in comment for locale bs_BA
1036 [24018] libc: gettext() may return NULL
1037 [24022] build: riscv build failure with Linux kernel 4.20-rc7
1038 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
1039 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
1041 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
1042 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
1044 [24046] localedata: en_US locale doesn't define date_fmt
1045 [24063] manual: @var{errno} should be @code{errno}
1046 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
1047 [24088] libc: VSCR field is not being correctly read in ucontext_t on
1049 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
1051 [24097] string: Can't use 64-bit register for size_t in assembly codes for
1053 [24110] hurd: SS_DISABLE never set in stack_t value returned by
1055 [24112] network: Do not send DNS queries for non-host names (where all
1056 answers will be rejected)
1057 [24130] libc: alpha __remqu corrupts $f3 register
1064 * The localization data for ISO 14651 is updated to match the 2016
1065 Edition 4 release of the standard, this matches data provided by
1066 Unicode 9.0.0. This update introduces significant improvements to the
1067 collation of Unicode characters. This release deviates slightly from
1068 the standard in that the collation element ordering for lowercase and
1069 uppercase LATIN script characters is adjusted to ensure that regular
1070 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
1071 is not matched by [a-z]. With the update many locales have been
1072 updated to take advantage of the new collation information. The new
1073 collation information has increased the size of the compiled locale
1074 archive or binary locales.
1076 * The GNU C Library can now be compiled with support for Intel CET, AKA
1077 Intel Control-flow Enforcement Technology. When the library is built
1078 with --enable-cet, the resulting glibc is protected with indirect
1079 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
1080 compatible with all existing executables and shared libraries. This
1081 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
1082 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
1083 capable of multi-byte NOPs, like x86-64 processors as well as Intel
1084 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
1085 x86_64 and x32 on non-CET processors. --enable-cet has been tested
1086 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
1089 * The GNU C Library now has correct support for ABSOLUTE symbols
1090 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
1091 relocated incorrectly or in some cases discarded. The GNU linker can
1092 make use of the newer semantics, but it must communicate it to the
1093 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
1094 field) to indicate such support is required.
1096 * Unicode 11.0.0 Support: Character encoding, character type info, and
1097 transliteration tables are all updated to Unicode 11.0.0, using
1098 generator scripts contributed by Mike FABIAN (Red Hat).
1100 * <math.h> functions that round their results to a narrower type are added
1101 from TS 18661-1:2014 and TS 18661-3:2015:
1103 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
1104 fMxaddfNx functions.
1106 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
1107 fMxsubfNx functions.
1109 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
1110 fMxmulfNx functions.
1112 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
1113 fMxdivfNx functions.
1115 * Two grammatical forms of month names are now supported for the following
1116 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
1117 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
1118 support two grammatical forms in abbreviated month names: Catalan, Greek,
1121 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
1122 include the support for two grammatical forms of month names.
1124 * Building and running on GNU/Hurd systems now works without out-of-tree
1127 * The renameat2 function has been added, a variant of the renameat function
1128 which has a flags argument. If the flags are zero, the renameat2 function
1129 acts like renameat. If the flag is not zero and there is no kernel
1130 support for renameat2, the function will fail with an errno value of
1131 EINVAL. This is different from the existing gnulib function renameatu,
1132 which performs a plain rename operation in case of a RENAME_NOREPLACE
1133 flags and a non-existing destination (and therefore has a race condition
1134 that can clobber the destination inadvertently).
1136 * The statx function has been added, a variant of the fstatat64
1137 function with an additional flags argument. If there is no direct
1138 kernel support for statx, glibc provides basic stat support based on
1139 the fstatat64 function.
1141 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
1142 library if installed. libidn2 version 2.0.5 or later is recommended. If
1143 libidn2 is not available, internationalized domain names are not encoded
1144 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
1145 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
1146 with an encoding error.) Flags which used to change the IDN encoding and
1147 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
1148 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
1149 deprecated. They no longer have any effect.
1151 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
1152 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
1153 range of ELF gABI expressions including such constructs as
1154 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
1155 have been further restricted, and where in the past a dynamic string
1156 token sequence may have been interpreted as a literal string it will
1157 now cause a load failure. These load failures were always considered
1158 unspecified behaviour from the perspective of the dynamic loader, and
1159 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
1160 results in a load failure now.
1162 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
1163 implementation includes all the standard functions provided by
1166 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
1167 thrd_detach, thrd_exit, and thrd_join for thread management.
1169 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
1170 mtx_destroy for mutual exclusion.
1172 - call_once for function call synchronization.
1174 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
1175 cnd_wait for conditional variables.
1177 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
1179 Application developers must link against libpthread to use ISO C threads.
1181 Deprecated and removed features, and other changes affecting compatibility:
1183 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
1184 installed. Software that was using either header should be updated to
1185 use standard <stdio.h> interfaces instead.
1187 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
1188 This was never required by the C standard, and the macros just expanded
1189 to call alternative names for the same functions. If you hoped getc and
1190 putc would provide performance improvements over fgetc and fputc, instead
1191 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
1192 necessary, flockfile and funlockfile.
1194 * All stdio functions now treat end-of-file as a sticky condition. If you
1195 read from a file until EOF, and then the file is enlarged by another
1196 process, you must call clearerr or another function with the same effect
1197 (e.g. fseek, rewind) before you can read the additional data. This
1198 corrects a longstanding C99 conformance bug. It is most likely to affect
1199 programs that use stdio to read interactive input from a terminal.
1202 * The macros 'major', 'minor', and 'makedev' are now only available from
1203 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
1204 headers that happen to include <sys/types.h>. These macros are rarely
1205 used, not part of POSIX nor XSI, and their names frequently collide with
1206 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
1207 further explanation.
1209 <sys/sysmacros.h> is a GNU extension. Portable programs that require
1210 these macros should first include <sys/types.h>, and then include
1211 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
1213 * The tilegx*-*-linux-gnu configurations are no longer supported.
1215 * The obsolete function ustat is no longer available to newly linked
1216 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
1217 function has been deprecated in favor of fstatfs and statfs.
1219 * The obsolete function nfsservctl is no longer available to newly linked
1220 binaries. This function was specific to systems using the Linux kernel
1221 and could not usefully be used with the GNU C Library on systems with
1222 version 3.1 or later of the Linux kernel.
1224 * The obsolete function name llseek is no longer available to newly linked
1225 binaries. This function was specific to systems using the Linux kernel
1226 and was not declared in a header. Programs should use the lseek64 name
1227 for this function instead.
1229 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
1230 getaddrinfo and getnameinfo functions have been deprecated. The behavior
1231 previously selected by them is now always enabled.
1233 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
1234 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
1235 restriction (rejecting '_' in host names, among other things) has been
1236 removed, for increased compatibility with non-IDN name resolution.
1238 * The fcntl function now have a Long File Support variant named fcntl64. It
1239 is added to fix some Linux Open File Description (OFD) locks usage on non
1240 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
1241 fcntl and LFS support is handled transparently. Also for Linux, the OFD
1242 locks act as a cancellation entrypoint.
1244 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
1245 ecb_crypt, and des_setparity are no longer available to newly linked
1246 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
1247 longer installed. These functions encrypted and decrypted data with the
1248 DES block cipher, which is no longer considered secure. Software that
1249 still uses these functions should switch to a modern cryptography library,
1252 * Reflecting the removal of the encrypt and setkey functions above, the
1253 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
1254 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1257 * The obsolete function fcrypt is no longer available to newly linked
1258 binaries. It was just another name for the standard function crypt,
1259 and it has not appeared in any header file in many years.
1261 * We have tentative plans to hand off maintenance of the passphrase-hashing
1262 library, libcrypt, to a separate development project that will, we hope,
1263 keep up better with new passphrase-hashing algorithms. We will continue
1264 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1265 'crypt_r' should not need to change at all; however, distributions will
1266 need to install <crypt.h> and libcrypt from a separate project.
1268 In this release, if the configure option --disable-crypt is used, glibc
1269 will not install <crypt.h> or libcrypt, making room for the separate
1270 project's versions of these files. The plan is to make this the default
1271 behavior in a future release.
1273 Changes to build and runtime requirements:
1275 GNU make 4.0 or later is now required to build glibc.
1277 Security related changes:
1279 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1280 been fixed by removing the glibc-internal IDNA implementation and using
1281 the system-provided libidn2 library instead. Originally reported by Hanno
1282 Böck and Christian Weisgerber.
1284 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1285 architecture could corrupt memory. Reported by Max Horn.
1287 CVE-2018-11236: Very long pathname arguments to realpath function could
1288 result in an integer overflow and buffer overflow. Reported by Alexey
1291 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1292 architecture could write beyond the target buffer, resulting in a buffer
1293 overflow. Reported by Andreas Schwab.
1295 The following bugs are resolved with this release:
1297 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1298 [6889] manual: 'PWD' mentioned but not specified
1299 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1300 when __WORDSIZE != 64
1301 [13762] regex: re_search etc. should return -2 on memory exhaustion
1302 [13888] build: /tmp usage during testing
1303 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1304 [14092] nptl: Support C11 threads
1305 [14095] localedata: Review / update collation data from Unicode / ISO
1307 [14508] libc: -Wformat warnings
1308 [14553] libc: Namespace pollution loff_t in sys/types.h
1309 [14890] libc: Make NT_PRFPREG canonical.
1310 [15105] libc: Extra PLT references with -Os
1311 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1313 [16335] manual: Feature test macro documentation incomplete and out of
1315 [16552] libc: Unify umount implementations in terms of umount2
1316 [17082] libc: htons et al.: statement-expressions prevent use on global
1317 scope with -O1 and higher
1318 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1319 [17438] localedata: pt_BR: wrong d_fmt delimiter
1320 [17662] libc: please implement binding for the new renameat2 syscall
1321 [17721] libc: __restrict defined as /* Ignore */ even in c11
1322 [17979] libc: inconsistency between uchar.h and stdint.h
1323 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1324 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1325 horrible machine code)
1326 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1328 [18471] libc: llseek should be a compat symbol
1329 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1331 [18991] nss: nss_files skips large entry in database
1332 [19239] libc: Including stdlib.h ends up with macros major and minor being
1334 [19463] libc: linknamespace failures when compiled with -Os
1335 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1336 [19527] locale: Normalized charset name not recognized by setlocale
1337 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1338 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1340 [19728] network: out of bounds stack read in libidn function
1341 idna_to_ascii_4i (CVE-2016-6261)
1342 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1343 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1344 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1346 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1347 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1348 [20419] dynamic-link: files with large allocated notes crash in
1350 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1351 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1352 [20980] manual: CFLAGS environment variable replaces vital options
1353 [21163] regex: Assertion failure in pop_fail_stack when executing a
1354 malformed regexp (CVE-2015-8985)
1355 [21234] manual: use of CFLAGS makes glibc detect no optimization
1356 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1357 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1358 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1359 [21508] locale: intl/tst-gettext failure with latest msgfmt
1360 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1361 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1362 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1364 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1366 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1367 [22247] network: Integer overflow in the decode_digit function in
1368 puny_decode.c in libidn (CVE-2017-14062)
1369 [22342] nscd: NSCD not properly caching netgroup
1370 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1371 [22550] localedata: es_ES locale (and other es_* locales): collation
1372 should treat ñ as a primary different character, sync the collation
1373 for Spanish with CLDR
1374 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1375 by gcc configured with --enable-default-pie
1376 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1377 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1378 crossing 2GB threshold (CVE-2017-18269)
1379 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1381 [22735] time: Misleading typo in time.h source comment regarding
1383 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1384 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1385 `__assert_perror_fail ()' to `__assert_fail_base ()'
1386 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1388 [22786] libc: Stack buffer overflow in realpath() if input size is close
1389 to SSIZE_MAX (CVE-2018-11236)
1390 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1391 through an absolute DT_NEEDED path
1392 [22792] build: tcb-offsets.h dependency dropped
1393 [22797] libc: pkey_get() uses non-reserved name of argument
1394 [22807] libc: PTRACE_* constants missing for powerpc
1395 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1396 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1397 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1398 [22848] localedata: ca_ES: update date definitions from CLDR
1399 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1400 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1401 [22896] localedata: Update locale data for an_ES
1402 [22902] math: float128 test failures with GCC 8
1403 [22918] libc: multiple common of `__nss_shadow_database'
1404 [22919] libc: sparc32: backtrace yields infinite backtrace with
1406 [22926] libc: FTBFS on powerpcspe
1407 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1409 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1410 [22947] libc: FAIL: misc/tst-preadvwritev2
1411 [22963] localedata: cs_CZ: Add alternative month names
1412 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1413 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1414 [22998] dynamic-link: execstack tests are disabled when SELinux is
1416 [23005] network: Crash in __res_context_send after memory allocation
1418 [23007] math: strtod cannot handle -nan
1419 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1420 [23036] regex: regex equivalence class regression
1421 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1422 [23069] libc: sigaction broken on riscv64-linux-gnu
1423 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1424 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1425 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1426 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1427 and libc build with -Os)
1428 [23140] localedata: More languages need two forms of month names
1429 [23145] libc: _init/_fini aren't marked as hidden
1430 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1431 [23171] math: C++ iseqsig for long double converts arguments to double
1432 [23178] nscd: sudo will fail when it is run in concurrent with commands
1433 that changes /etc/passwd
1434 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1436 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1437 [23208] localedata: New locale - Lower Sorbian (dsb)
1438 [23233] regex: Memory leak in build_charclass_op function in file
1440 [23236] stdio: Harden function pointers in _IO_str_fields
1441 [23250] nptl: Offset of __private_ss differs from GCC
1442 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1443 -mtune=generic -mfpmath=sse
1444 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1446 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1447 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1449 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1450 [23277] math: nan function should not have const attribute
1451 [23279] math: scanf and strtod wrong for some hex floating-point
1452 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1454 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1455 [23303] build: undefined reference to symbol
1456 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1457 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1459 [23313] stdio: libio vtables validation and standard file object
1461 [23329] libc: The __libc_freeres infrastructure is not properly run across
1463 [23349] libc: Various glibc headers no longer compatible with
1465 [23351] malloc: Remove unused code related to heap dumps and malloc
1467 [23363] stdio: stdio-common/tst-printf.c has non-free license
1468 [23396] regex: Regex equivalence regression in single-byte locales
1469 [23422] localedata: oc_FR: More updates of locale data
1470 [23442] build: New warning with GCC 8
1471 [23448] libc: Out of bounds access in IBM-1390 converter
1472 [23456] libc: Wrong index_cpu_LZCNT
1473 [23458] build: tst-get-cpu-features-static isn't added to tests
1474 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1476 [23467] dynamic-link: x86/CET: A property note parser bug
1483 * The GNU C Library can now be compiled with support for building static
1484 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1485 executables are like static executables but can be loaded at any address
1486 and provide additional security hardening benefits at the cost of some
1487 memory and performance. When the library is built with --enable-static-pie
1488 the resulting libc.a is usable with GCC 8 and above to create static PIE
1489 executables using the GCC option '-static-pie'. This feature is currently
1490 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1491 aarch64 with binutils 2.30 or later.
1493 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1494 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1497 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1499 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1501 * In order to support faster and safer process termination the malloc API
1502 family of functions will no longer print a failure address and stack
1503 backtrace after detecting heap corruption. The goal is to minimize the
1504 amount of work done after corruption is detected and to avoid potential
1505 security issues in continued process execution. Reducing shutdown time
1506 leads to lower overall process restart latency, so there is benefit both
1507 from a security and performance perspective.
1509 * The abort function terminates the process immediately, without flushing
1510 stdio streams. Previous glibc versions used to flush streams, resulting
1511 in deadlocks and further data corruption. This change also affects
1512 process aborts as the result of assertion failures.
1514 * On platforms where long double has the IEEE binary128 format (aarch64,
1515 alpha, mips64, riscv, s390 and sparc), the math library now implements
1516 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1517 These are the same interfaces added in version 2.26 for some platforms where
1518 this format is supported but is not the format of long double.
1520 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1521 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1522 implements interfaces for that type, as defined by ISO/IEC TS
1523 18661-3:2015. These are corresponding interfaces to those supported for
1526 * The math library now implements interfaces for the _Float32, _Float64 and
1527 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1528 corresponding interfaces to those supported for _Float128.
1530 * glibc now implements the memfd_create and mlock2 functions on Linux.
1532 * Support for memory protection keys was added. The <sys/mman.h> header now
1533 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1536 * The copy_file_range function was added.
1538 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1540 * The ldconfig utility now processes `include' directives using the C/POSIX
1541 collation ordering. Previous glibc versions used locale-specific
1542 ordering, the change might break systems that relied on that.
1544 * Support for two grammatical forms of month names has been added.
1545 In a call to strftime, the "%B" and "%b" format specifiers will now
1546 produce the grammatical form required when the month is used as part
1547 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1548 required when the month is named by itself. For instance, in Greek
1549 and in many Slavic and Baltic languages, "%B" will produce the month
1550 in genitive case, and "%OB" will produce the month in nominative case.
1552 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1553 are all valid and will all accept any known form of month
1554 name---standalone or complete, abbreviated or full. In a call to
1555 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1556 the strings used by "%B" and "%b", respectively. New query
1557 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1558 used by "%OB" and "%Ob", respectively.
1560 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1561 define the strings for %OB and %Ob, respectively; these have the
1562 same syntax as "mon" and "abmon". These arrays are optional; if they
1563 are not provided then they have the same content as "mon" and "abmon",
1566 These features are provided for locales which define "alt_mon" and/or
1567 "ab_alt_mon" in their locale source data. This release includes such
1568 alternative month name data for the following languages: Belarusian,
1569 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1571 This feature is currently a GNU extension, but it is expected to
1572 be added to the next revision of POSIX, and it is also already
1573 available on some BSD-derived operating systems.
1575 This feature will cause existing statically compiled applications
1576 to fail to load locales and fall back to the builtin C/POSIX locales.
1577 See notes below for other changes affecting compatibility.
1579 * Support for the RISC-V ISA running on Linux has been added. This port
1580 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1581 for the following ISA and ABI pairs:
1587 Deprecated and removed features, and other changes affecting compatibility:
1589 * Statically compiled applications attempting to load locales compiled for the
1590 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1591 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1592 support for two grammatical forms of the month names, also extends the locale
1593 data binary format. Static applications needing locale support must be
1594 recompiled to match the runtime and data they are deployed with. In some
1595 distributions there is an upgrade window where dynamically linked applications
1596 may use a new library but the old locale data and also fall back to the
1597 builtin C/POSIX locales; restarting the application process is sufficient to
1600 * Support for statically linked applications which call dlopen is deprecated
1601 and will be removed in a future version of glibc. Applications which call
1602 dlopen need to be linked dynamically instead.
1604 * Support for old programs which use internal stdio data structures and
1605 functions is deprecated. This includes programs which use the C++ streams
1606 provided by libstdc++ in GCC 2.95. Programs which use the internal
1607 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1608 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1609 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1610 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1611 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1612 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1613 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1614 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1615 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1616 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1617 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1618 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1619 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1620 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1621 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1622 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1623 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1624 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1625 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1626 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1627 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1628 future version of glibc. Unlike other symbol removals, these old
1629 applications will not be supported using compatibility symbols.
1631 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1632 defined by <sys/ptrace.h>.
1634 * libm no longer supports SVID error handling (calling a user-provided
1635 matherr function on error) or the _LIB_VERSION variable to control error
1636 handling. (SVID error handling and the _LIB_VERSION variable still work
1637 for binaries linked against older versions of the GNU C Library.) The
1638 libieee.a library is no longer provided. math.h no longer defines struct
1639 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1640 TLOSS, PLOSS and HUGE.
1642 * The libm functions pow10, pow10f and pow10l are no longer supported for
1643 new programs. Programs should use the standard names exp10, exp10f and
1644 exp10l for these functions instead.
1646 * The mcontext_t type is no longer the same as struct sigcontext. On
1647 platforms where it was previously the same, this changes the C++ name
1648 mangling for interfaces involving this type.
1650 * The add-ons mechanism for building additional packages at the same time as
1651 glibc has been removed. The --enable-add-ons configure option is now
1654 * The --without-fp configure option is now ignored. Whether hardware
1655 floating-point instructions are used is now configured based on whether
1656 the compiler used at configure time (without any options implied by a
1657 --with-cpu= configure option) uses such instructions.
1659 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1660 the specified string can be parsed as a domain name.
1662 * In the malloc_info output, the <heap> element may contain another <aspace>
1663 element, "subheaps", which contains the number of sub-heaps.
1665 * The libresolv function p_secstodate is no longer supported for new
1668 * The tilepro-*-linux-gnu configuration is no longer supported.
1670 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1671 and will be removed in a future release. Software that is still using
1672 either header should be updated to use standard <stdio.h> interfaces
1675 libio.h was originally the header for a set of supported GNU extensions,
1676 but they have not been maintained as such in many years, they are now
1677 standing in the way of improvements to stdio, and we don't think there are
1678 any remaining external users. _G_config.h was never intended for public
1679 use, but predates the bits convention.
1681 Changes to build and runtime requirements:
1683 * bison version 2.7 or later is required to generate code in the 'intl'
1686 Security related changes:
1688 CVE-2009-5064: The ldd script would sometimes run the program under
1689 examination directly, without preventing code execution through the
1690 dynamic linker. (The glibc project disputes that this is a security
1691 vulnerability; only trusted binaries must be examined using the ldd
1694 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1695 suffered from a one-byte overflow during ~ operator processing (either
1696 on the stack or the heap, depending on the length of the user name).
1697 Reported by Tim Rühsen.
1699 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1700 would sometimes fail to free memory allocated during ~ operator
1701 processing, leading to a memory leak and, potentially, to a denial
1704 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1705 without GLOB_NOESCAPE, could write past the end of a buffer while
1706 unescaping user names. Reported by Tim Rühsen.
1708 CVE-2017-17426: The malloc function, when called with an object size near
1709 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1710 instead of NULL. This was a regression introduced with the new malloc
1711 thread cache in glibc 2.26. Reported by Iain Buclaw.
1713 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1714 to the allocation of too much memory. (This is not a security bug per se,
1715 it is mentioned here only because of the CVE assignment.) Reported by
1718 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1719 of the number of search path components. (This is not a security
1720 vulnerability per se because no trust boundary is crossed if the fix for
1721 CVE-2017-1000366 has been applied, but it is mentioned here only because
1722 of the CVE assignment.) Reported by Qualys.
1724 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1725 for AT_SECURE or SUID binaries could be used to load libraries from the
1728 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1729 succeeds without returning an absolute path due to unexpected behaviour
1730 of the Linux kernel getcwd syscall. Reported by halfdog.
1732 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1733 an object size near the value of SIZE_MAX, would return a pointer to a
1734 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1736 CVE-2018-6551: The malloc function, when called with an object size near
1737 the value of SIZE_MAX, would return a pointer to a buffer which is too
1738 small, instead of NULL.
1740 The following bugs are resolved with this release:
1742 [866] glob: glob should match dangling symlinks
1743 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1744 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1746 [5997] math: Very slow execution of sinf function
1747 [10580] localedata: hr_HR: updated locale
1748 [10871] locale: 'mon' array should contain both nominative and genitive
1750 [12349] localedata: eu_ES: incorrect thousands separator
1751 [13605] localedata: shn_MM: new Shan locale
1752 [13805] localedata: ru_RU: currency should use ',' as radix point
1753 [13953] localedata: km_KH: locale update
1754 [13994] localedata: mjw_IN: new locale
1755 [14121] build: make writes .mo files in po directory
1756 [14333] libc: Fix the race between atexit() and exit()
1757 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1758 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1760 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1761 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1762 width Latin characters
1763 [15332] localedata: es_CU: locale update
1764 [15436] stdio: Don't close or flush stdio streams on abort
1765 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1767 [16148] localedata: ca_ES: incorrect thousands separator
1768 [16750] dynamic-link: ldd should not try to execute the binaries
1770 [16777] localedata: pl_PL: incorrect thousands separator in locale
1771 [16905] localedata: hanzi: new collation
1772 [17563] localedata: cmn_TW: add hanzi collation
1773 [17750] localedata: wrong collation order of diacritics in most locales
1774 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1776 [17956] build: Build fails on missing definitions from header file
1777 nss/nss.h when Mozilla NSS is used for cryptography
1778 [18203] libc: realpath() does not handle unreachable paths correctly
1779 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1780 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1781 [18822] libc: Internal functions are called via PLT
1782 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1783 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1784 [19574] libc: glibc should support building static PIE binaries
1785 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1787 [19971] glob: glob: Do not skip entries with zero d_ino values
1788 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1789 [20008] localedata: km_KH: convert to translit_neutral
1790 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1791 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1792 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1793 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1794 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1796 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1797 they're set, wrong errors returned by gaih_inet when lookup functions
1799 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1800 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1802 [20952] localedata: yuw_PG: new locale
1803 [21084] localedata: charmaps/IBM858: new codepage
1804 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1805 [21242] libc: assert gives pedantic warning in old gcc versions
1806 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1807 __regcall calling convention
1808 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1809 [21326] libc: C99 functions are not declared for C++11 and later if
1810 _GNU_SOURCE is not predefined by g++
1811 [21457] libc: sys/ucontext.h namespace
1812 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1813 [21660] math: GCC fails to compile a formula with tgmath.h
1814 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1815 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1816 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1817 [21684] math: tgmath.h handling of complex integers
1818 [21685] math: tgmath.h handling of bit-fields
1819 [21686] math: tgmath.h handling of __int128
1820 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1822 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1824 [21750] localedata: column width of characters incompatible with classical
1826 [21754] malloc: malloc: Perform as little work as possible after heap
1827 consistency check failures
1828 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1829 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1830 [21791] string: Unused XXX_chk_XXX functions in libc.a
1831 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1833 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1835 [21845] localedata: Added new Locale bho_NP
1836 [21853] localedata: Fix abday Which looks same as day in zh_SG
1837 [21854] localedata: Added New Locale en_SC
1838 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1839 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1840 _dl_runtime_resolve_avx_slow
1841 [21885] network: getaddrinfo: gethosts does not release resolver context
1842 on memory allocation failure
1843 [21899] libc: XPG4.2 sigaction namespace
1844 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1846 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1848 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1849 errno value, causing getaddrinfo to fail
1850 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1851 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1852 instead of EAI_NODATA
1853 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1854 constant PTRACE_SEIZE_DEVEL
1855 [21930] math: C-only gcc builtins used in <math.h> isinf
1856 [21932] network: Unpaired __resolv_context_get in generic get*_r
1858 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1859 [21944] libc: sigval namespace
1860 [21951] localedata: Update hanzi collation by stroke
1861 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1862 sysdeps/x86_64/fpu/e_expf.S
1863 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1864 allocation in syscall loops)
1865 [21959] localedata: Fix Country name for xh_ZA
1866 [21960] localedata: Fix abmon for bem_ZM
1867 [21966] math: AVX2 mathvec functions use FMA without checking
1868 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1869 [21971] localedata: Added New Locale for mfe_MU
1870 [21972] libc: assert macro requires operator== (int) for its argument type
1871 [21973] math: [sparc] libm missing sqrtl compat symbol
1872 [21974] libc: Remove __bb_init_func and __bb_exit_func
1873 [21982] string: stratcliff.c: error: assuming signed overflow does not
1875 [21986] stdio: __guess_grouping is called incorrectly
1876 [21987] math: [sparc32] wrong bits/long-double.h installed
1877 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1879 [22022] localedata: Missing country_name for mni_IN
1880 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1882 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1884 [22026] locale: iconv_open: heap overflow on gconv_init failure
1885 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1886 [22035] math: [m68k] bits/math-inline.h macro namespace
1887 [22038] localedata: Fix abbreviated weeks and months for Somali
1888 [22044] localedata: Remove redundant data for Limburgish Language
1889 [22050] malloc: Linking with -lmcheck does not hook
1890 __malloc_initialize_hook correctly
1891 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1892 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1893 [22070] localedata: charmaps/UTF-8: wcwidth for
1894 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1895 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1896 Jungseong and Jongseong) should be 0
1897 [22078] nss: nss_files performance issue in multi mode
1898 [22082] math: bits/math-finite.h exp10 condition
1899 [22086] libc: pcprofiledump incorrect cross-endian condition
1900 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1901 [22095] network: Name server address allocation memory leak in resolv.conf
1903 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1905 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1906 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1908 [22111] malloc: malloc: per thread cache is not returned when thread exits
1909 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1910 [22134] libc: [linux] implement fexecve with execveat
1911 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1913 [22145] libc: ttyname() gives up too early in the face of namespaces
1914 [22146] math: C++ build issue with float128 on x86_64
1915 [22153] nptl: nptl: save error code before process termination
1916 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1917 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1918 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1919 [22165] libc: [hppa] Text relocations in libc.so
1920 [22180] libc: destructor registered via __cxa_atexit is called twice
1921 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1922 symlinks") cause "make" segfaults
1923 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1925 [22207] libc: FAIL: stdlib/test-atexit-race
1926 [22225] math: nearbyint arithmetic moved before feholdexcept
1927 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1928 [22235] math: iscanonical in C++ and float128
1929 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1930 the svid compat wrapper
1931 [22244] math: ynf and yn are wrong without the svid compat wrapper
1932 [22273] libc: Improper assert in Linux posix_spawn implementation
1933 [22284] libc: -pg -pie doesn't work
1934 [22292] locale: localedef exits with error 4 when it should be error 1
1935 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1936 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1938 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1939 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1941 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1942 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1943 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1944 [22322] libc: [mips64] wrong bits/long-double.h installed
1945 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1946 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1948 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1949 [22343] malloc: Integer overflow in posix_memalign
1950 [22347] libc: getrandom() returns the number of bytes that were copied to
1951 the buffer even though the comments say "Return 0 on success and -1 on
1953 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1954 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1956 [22370] dynamic-link: Incorrect note padding check
1957 [22375] libc: malloc returns pointer from tcache_get when should return
1958 NULL (CVE-2017-17426)
1959 [22377] math: iseqsig, float128 and C++
1960 [22382] localedata: Error in tpi_PG locale
1961 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1962 inside the ASCII printable range
1963 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1965 [22403] localedata: Slash needs escaping in some locales
1966 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1967 [22409] network: res_hnok does not accept some host names used on the
1969 [22412] network: res_dnok, res_hnok should perform syntax checks
1970 [22413] network: ns_name_pton ignores syntactically invalid trailing
1972 [22415] stdio: setvbuf can lead to invalid free/segfault
1973 [22432] build: Non-deterministic build
1974 [22439] malloc: malloc_info should compute summary statistics for all sub-
1976 [22442] network: if_nametoindex could report index for the wrong
1977 networking interface
1978 [22446] build: aliasing violation calling readlink in handle_request
1979 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1980 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1981 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1982 __nscd_hash/__nss_hash
1983 [22463] network: p_secstodate overflow handling
1984 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1985 [22478] libc: sigwait can fail with EINTR
1986 [22505] libc: ldconfig processes include directive in locale-specific
1988 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1989 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1990 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1991 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1992 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1993 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1994 same as for Croatian
1995 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1996 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1997 [22577] libc: missing newline after "cannot allocate TLS data structures
1999 [22588] manual: manual/conf.texi: missing underscore in front of
2001 [22593] math: nextafter and nexttoward are declared with const attribute
2002 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
2003 [22603] string: ia64 memchr overflows internal pointer check
2004 [22605] libc: SH clone does not set the exit code correctly
2005 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
2007 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
2008 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
2009 modified in case of success
2010 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
2011 [22615] manual: manual: ambiguous wording about errno value in case of
2013 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
2015 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
2016 binaries or if /proc is not mounted (CVE-2017-16997)
2017 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
2018 [22630] build: $(no-pie-ldflag) is no longer effective
2019 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
2020 [22635] nptl: pthread_self returns NULL before libpthread is loaded
2021 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
2022 [22637] nptl: guard size is subtracted from thread stack size instead of
2024 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
2025 [22657] localedata: hu_HU: Avoid double space in date
2026 [22660] math: fmax, fmin sNaN handling on alpha
2027 [22664] libc: New warning of GCC8
2028 [22665] math: alpha: ceil and floor raise inexact exceptions
2029 [22666] math: alpha: trunc raise inexact exceptions
2030 [22667] libc: makecontext lacks stack alignment on i386
2031 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
2032 [22679] libc: getcwd(3) can succeed without returning an absolute path
2034 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
2035 elision and tunables
2036 [22687] math: [powerpc-nofpu] complex long double functions spurious
2038 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
2039 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
2040 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
2042 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
2043 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
2045 [22701] nis: Incomplete removal of libnsl
2046 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
2047 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
2048 [22715] dynamic-link: FAIL: elf/tst-audit10
2049 [22719] libc: Backtrace tests fail on hppa
2050 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
2051 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
2052 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
2053 before the first call to crypt_r () in crypt/badsalttest.c
2060 * A per-thread cache has been added to malloc. Access to the cache requires
2061 no locks and therefore significantly accelerates the fast path to allocate
2062 and free small amounts of memory. Refilling an empty cache requires locking
2063 the underlying arena. Performance measurements show significant gains in a
2064 wide variety of user workloads. Workloads were captured using a special
2065 instrumented malloc and analyzed with a malloc simulator. Contributed by
2066 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
2068 * Unicode 10.0.0 Support: Character encoding, character type info, and
2069 transliteration tables are all updated to Unicode 10.0.0, using
2070 generator scripts contributed by Mike FABIAN (Red Hat).
2071 These updates cause user visible changes, especially the changes in
2072 wcwidth for many emoji characters cause problems when emoji sequences
2073 are rendered with pango, see for example:
2074 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
2076 * Collation of Hungarian has been overhauled and is now consistent with "The
2077 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
2080 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
2082 - The GNU C Library will now detect when /etc/resolv.conf has been
2083 modified and reload the changed configuration. The new resolver option
2084 “no-reload” (RES_NORELOAD) disables this behavior.
2086 - The GNU C Library now supports an arbitrary number of search domains
2087 (configured using the “search” directive in /etc/resolv.conf);
2088 previously, there was a hard limit of six domains. For backward
2089 compatibility, applications that directly modify the ‘_res’ global
2090 object are still limited to six search domains.
2092 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
2093 Library will now randomly pick a name server from the configuration as a
2094 starting point. (Previously, the second name server was always used.)
2096 * The tunables feature is now enabled by default. This allows users to tweak
2097 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
2099 * New function reallocarray, which resizes an allocated block (like realloc)
2100 to the product of two sizes, with a guaranteed clean failure upon integer
2101 overflow in the multiplication. Originally from OpenBSD, contributed by
2102 Dennis Wölfing and Rüdiger Sonderfeld.
2104 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
2105 These are extended versions of preadv and pwritev, respectively, taking an
2106 additional flags argument. The set of supported flags depends on the
2107 running kernel; full support currently requires kernel 4.7 or later.
2109 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
2110 create a new session ID for the spawned process. This feature is
2111 scheduled to be added to the next major revision of POSIX; for the time
2112 being, it is available under _GNU_SOURCE.
2114 * errno.h is now safe to use from C-preprocessed assembly language on all
2115 supported operating systems. In this context, it will only define the
2116 Exxxx constants, as preprocessor macros expanding to integer literals.
2118 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
2119 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
2120 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
2121 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
2123 To compile programs that use this feature, the compiler must support
2124 128-bit floating point with the type name _Float128 (as defined by TS
2125 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
2126 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
2127 must be defined to make the new interfaces visible.
2129 The new functions and macros correspond to those present for other
2130 floating-point types (except for a few obsolescent interfaces not
2131 supported for the new type), with F128 or f128 suffixes; for example,
2132 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
2133 printf or scanf formats for the new type; the strfromf128 and strtof128
2134 interfaces should be used instead.
2136 Deprecated and removed features, and other changes affecting compatibility:
2138 * The synchronization that pthread_spin_unlock performs has been changed to
2139 now be equivalent to a C11 atomic store with release memory order to the
2140 spin lock's memory location. Previously, several (but not all)
2141 architectures used stronger synchronization (e.g., containing what is
2142 often called a full barrier). This change can improve performance, but
2143 may affect odd fringe uses of spin locks that depend on the previous
2144 behavior (e.g., using spin locks as atomic variables to try to implement
2145 Dekker's mutual exclusion algorithm).
2147 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
2150 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
2151 will only be built and installed when the GNU C Library is configured with
2152 --enable-obsolete-rpc. This allows alternative RPC implementations, such
2153 as TIRPC or rpcsvc-proto, to be used.
2155 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
2156 libnss_compat, are deprecated, and will not be built or installed by
2159 The NIS(+) support library, libnsl, is also deprecated. By default, a
2160 compatibility shared library will be built and installed, but not headers
2161 or development libraries. Only a few NIS-related programs require this
2162 library. (In particular, the GNU C Library has never required programs
2163 that use 'gethostbyname' to be linked with libnsl.)
2165 Replacement implementations based on TIRPC, which additionally support
2166 IPv6, are available from <https://github.com/thkukuk/>. The configure
2167 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
2168 name service modules, to be built and installed.
2170 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
2171 support is enabled, the configured recursive resolver must support EDNS.
2172 (Responding to EDNS-enabled queries with responses which are not
2173 EDNS-enabled is fine, but FORMERR responses are not.)
2175 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
2176 servers have not supported this opcode for a long time.
2178 * The _res_opcodes variable has been removed from libresolv. It had been
2179 exported by accident.
2181 * <string.h> no longer includes inline versions of any string functions,
2182 as this kind of optimization is better done by the compiler. The macros
2183 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
2185 * The nonstandard header <xlocale.h> has been removed. Most programs should
2186 use <locale.h> instead. If you have a specific need for the definition of
2187 locale_t with no other declarations, please contact
2188 libc-alpha@sourceware.org and explain.
2190 * The obsolete header <sys/ultrasound.h> has been removed.
2192 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
2194 * The obsolete function cfree has been removed. Applications should use
2197 * The stack_t type no longer has the name struct sigaltstack. This changes
2198 the C++ name mangling for interfaces involving this type.
2200 * The ucontext_t type no longer has the name struct ucontext. This changes
2201 the C++ name mangling for interfaces involving this type.
2203 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
2204 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
2205 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
2206 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
2207 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
2208 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
2209 fpregset_t type no longer has the name struct fpu. This changes the C++
2210 name mangling for interfaces involving those types.
2212 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
2213 synced with the kernel:
2215 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
2216 are not supported on this architecture and have been removed.
2218 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
2219 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
2220 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
2222 Programs that assume the GET/SETREGS ptrace requests are universally
2223 available will now fail to build, instead of malfunctioning at runtime.
2225 Changes to build and runtime requirements:
2227 * Linux kernel 3.2 or later is required at runtime, on all architectures
2228 supported by that kernel. (This is a change from version 2.25 only for
2231 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
2233 * On most architectures, GCC 4.9 or later is required to build the GNU C
2234 Library. On powerpc64le, GCC 6.2 or later is required.
2236 Older GCC versions and non-GNU compilers are still supported when
2237 compiling programs that use the GNU C Library. (We do not know exactly
2238 how old, and some GNU extensions to C may be _de facto_ required. If you
2239 are interested in helping us make this statement less vague, please
2240 contact libc-alpha@sourceware.org.)
2242 Security related changes:
2244 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
2245 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
2247 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
2248 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
2250 * Avoid printing a backtrace from the __stack_chk_fail function since it is
2251 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
2254 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
2255 fixed (CVE-2017-12133).
2257 The following bugs are resolved with this release:
2259 [984] network: Respond to changed resolv.conf in gethostbyname
2260 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2261 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2263 [12189] libc: __stack_chk_fail should not attempt a backtrace
2265 [14096] time: Race condition on timezone/tst-timezone.out
2266 [14172] localedata: az_IR: new locale
2267 [14995] build: glibc fails to build if gold is the default linker, even if
2269 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2270 [16637] network: inet_pton function is accepting IPv6 with bad format
2271 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2272 x86 and other generic code
2273 [16875] localedata: ko_KR: fix lang_name
2274 [17225] localedata: ar_SY: localized month names for May and June are
2276 [17297] localedata: da_DK: wrong date_fmt string
2277 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2278 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2279 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2280 [19066] localedata: ar_SA abbreviated day and month names are in English
2281 [19569] network: resolv: Support an arbitrary number of search domains
2282 [19570] network: Implement random DNS server selection in the stub
2284 [19838] locale: localedef fails on PA-RISC
2285 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2286 order of 0D36 and 0D37
2287 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2289 [20098] libc: FAIL: debug/backtrace-tst on hppa
2290 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2292 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2294 [20313] localedata: Update locale data to Unicode 9.0
2295 [20424] manual: Document how to provide a malloc replacement
2296 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2298 [20686] locale: Add el_GR@euro to SUPPORTED.
2299 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2300 failures consistently
2301 [21015] dynamic-link: Document and fix --enable-bind-now
2302 [21016] nptl: pthread_cond support is broken on hppa
2303 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2304 frame-pointer on i386
2305 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2307 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2308 [21088] libc: Build fails with --enable-static-nss
2309 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2310 generic c code is used
2311 [21109] libc: Tunables broken on big-endian
2312 [21112] math: powf has large ulp errors with base close to 1 and exponent
2314 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2316 [21120] malloc: glibc malloc is incompatible with GCC 7
2317 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2319 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2320 (-0.0) when linking with -lieee
2321 [21171] math: log10, log2 and lgamma return incorrect results
2322 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2323 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2324 [21207] localedata: ce_RU: update weekdays from CLDR
2325 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2326 [21217] localedata: Update months from CLDR-31
2327 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2328 [21243] libc: support_delete_temp_file should issue warning for failed
2330 [21244] libc: support resolv_test_start() socket fd close should be
2332 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2333 new posix_spawn implementation
2334 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2335 leads to lower CPU frequency
2336 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2337 [21261] libc: [sparc64] bits/setjmp.h namespace
2338 [21267] network: [mips] bits/socket.h IOC* namespace
2339 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2340 [21270] libc: mmap64 silently truncates large offset values
2341 [21275] libc: posix_spawn always crashes on ia64 now
2342 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2343 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2344 [21289] libc: Incorrect declaration for 32-bit platforms with
2345 _FILE_OFFSET_BITS=64 causes build error
2346 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2347 not support gethostbyname4_r
2348 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2350 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2352 [21340] libc: Support POSIX_SPAWN_SETSID
2353 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2354 [21359] network: ns_name_pack needs additional byte in destination buffer
2355 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2356 against fragmentation attacks (CVE-2017-12132)
2357 [21369] network: resolv: Remove EDNS fallback
2358 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2360 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2361 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2362 [21393] stdio: Missing dup3 error check in freopen, freopen64
2363 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2364 [21399] localedata: Bad description for U00EC in
2365 localedata/charmaps/CP1254
2366 [21411] malloc: realloc documentation error
2367 [21426] network: sys/socket.h uio.h namespace
2368 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2369 [21445] libc: signal.h bsd_signal namespace
2370 [21455] network: Network headers stdint.h namespace
2371 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2373 [21475] network: resolv: Overlong search path is truncated mid-label
2374 [21511] libc: sigstack namespace
2375 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2376 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2377 bits/syscall.h: No such file or directory
2378 [21517] libc: struct sigaltstack namespace
2379 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2380 [21533] localedata: Update locale data to Unicode 10.0
2382 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2383 junk at end of line, first unrecognized character is `@'
2384 [21538] libc: SIG_HOLD missing for XPG4
2385 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2386 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2387 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2388 [21543] libc: sigevent namespace
2389 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2390 size for general purpose registers in mcontext_t structure
2391 [21550] libc: sigwait namespace
2392 [21552] libc: XPG4 bsd_signal namespace
2393 [21554] libc: sigpause namespace
2394 [21560] libc: sys/wait.h signal.h namespace
2395 [21561] libc: waitid namespace
2396 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2397 '/usr/include/stdlib.h': Permission denied
2398 [21575] libc: sys/wait.h missing struct rusage definition
2399 [21584] libc: sigaltstack etc namespace
2400 [21597] libc: siginterrupt namespace
2401 [21607] math: hppa: FAIL: math/test-tgmath
2402 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2404 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2405 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2406 stack and heap (CVE-2017-1000366)
2407 [21625] libc: wait3 namespace
2408 [21654] nss: Incorrect pointer alignment in NSS group merge result
2410 [21657] network: Parse interface zone id for node-local multicast
2411 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2413 [21666] libc: .symver is used on common symbol
2414 [21668] network: resolv: res_init cross-thread broadcast introduces race
2416 [21687] math: tgmath.h totalorder, totalordermag return type
2417 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2419 [21696] libc: Incorrect assumption of of __cpu_mask in
2420 posix/sched_cpucount.c
2421 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2422 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2424 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2425 leading to relocation crash
2426 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2427 `resolv_conf_matches (resp, conf)' failed.
2428 [21710] localedata: Added Samoan language locale for Samoa
2429 [21711] localedata: Pashto yesstr/nostr locale are missing
2430 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2431 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
2432 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2433 [21723] localedata: yesstr/nostr missing for Chinese language locale
2434 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2436 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2438 [21728] localedata: New Locale for Tongan language
2439 [21729] localedata: incorrect LC_NAME fields for hi_IN
2440 [21733] localedata: yesstr and nostr are missing for zh_HK
2441 [21734] localedata: Missing yesstr and nostr are for kw_GB
2442 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2443 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2444 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2445 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2447 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2449 [21749] localedata: Wrong abbreviated day name (“abday”) for
2451 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2452 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2453 [21759] localedata: missing yesstr and nostr for Tigrinya
2454 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2455 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2456 [21767] localedata: Missing Bislama locales
2457 [21768] localedata: Missing yesstr and nostr for aa_ET
2458 [21770] localedata: Missing Field in li_NL
2459 [21778] nptl: Robust mutex may deadlock
2460 [21779] libc: MicroBlaze segfaults when loading libpthread
2461 [21783] localedata: Fix int_select international_call_prefixes
2462 [21784] localedata: Inconsistency in country_isbn
2463 [21788] localedata: Missing Country Postal Abbreviations
2464 [21794] localedata: Added-country_isbn-for-Italy
2465 [21795] localedata: Add/Fix country_isbn for France
2466 [21796] localedata: Added country_isbn for Republic of Korea
2467 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2468 [21799] localedata: Added int_select international_call_prefixes
2469 [21801] localedata: Added int_select international_call_prefixes
2470 [21804] nptl: Double semicolon in thread-shared-types.h
2471 [21807] localedata: LC_ADDRESS fix for pap_CW
2472 [21808] localedata: Fix LC_ADDRESS for pap_AW
2473 [21821] localedata: Added country_name in mai_IN
2474 [21822] localedata: Fix LC_TIME for mai_IN
2475 [21823] localedata: missing yesstr, nostr for sa_IN
2476 [21825] localedata: Fix name_mrs for mag_IN
2477 [21828] localedata: 2.26 changelog should mention user visible changes
2479 [21835] localedata: Added Maithili language locale for Nepal
2480 [21838] localedata: Removed redundant data for the_NP
2481 [21839] localedata: Fix LC_MONETARY for ta_LK
2482 [21844] localedata: Fix Latin characters and Months Sequence.
2483 [21848] localedata: Fix mai_NP Title Name
2488 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2489 24731-2:2010, is supported to enable declarations of functions from that
2490 TR. Note that not all functions from that TR are supported by the GNU C
2493 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2494 18661-1:2014, is supported to enable declarations of functions and macros
2495 from that TS. Note that not all features from that TS are supported by
2498 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2499 18661-4:2015, is supported to enable declarations of functions and macros
2500 from that TS. Note that most features from that TS are not supported by
2503 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2504 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2505 Since the GNU C Library defaults to a much newer revision of POSIX, this
2506 will only affect programs that specifically request an old conformance
2507 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2508 see a change in the visible declarations, but a program compiled with
2509 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2512 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2513 defined by all multithreaded code, but glibc has not required this for
2516 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2517 means that in a future release, the macros “major”, “minor”, and “makedev”
2518 will only be available from <sys/sysmacros.h>.
2520 These macros are not part of POSIX nor XSI, and their names frequently
2521 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2522 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2523 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2526 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2527 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2528 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2530 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2531 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2532 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2533 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2534 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2535 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2536 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2537 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2538 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2539 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2540 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2543 * New <math.h> features are added from TS 18661-1:2014:
2545 - Signaling NaN macros: SNANF, SNAN, SNANL.
2547 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2548 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2549 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2551 - llogb functions: the llogb, llogbf and llogbl functions, and the
2552 FP_LLOGB0 and FP_LLOGBNAN macros.
2554 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2557 - Comparison macros: iseqsig.
2559 - Classification macros: iscanonical, issubnormal, iszero.
2561 - Total order functions: totalorder, totalorderf, totalorderl,
2562 totalordermag, totalordermagf, totalordermagl.
2564 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2566 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2567 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2569 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2570 are added to libc. They convert a floating-point number into string.
2572 * Most of glibc can now be built with the stack smashing protector enabled.
2573 It is recommended to build glibc with --enable-stack-protector=strong.
2574 Implemented by Nick Alcock (Oracle).
2576 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2577 intended to be used instead of memset() to erase sensitive data after use;
2578 the compiler will not optimize out calls to explicit_bzero even if they
2579 are "unnecessary" (in the sense that no _correct_ program can observe the
2580 effects of the memory clear).
2582 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2583 to float instead of double. This does not affect the ABI of any libraries
2584 that are part of the GNU C Library, but may affect the ABI of other
2585 libraries that use this type in their interfaces.
2587 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2588 float_t and double_t types are now defined to long double instead of float
2589 and double. These options are not the default, and this does not affect
2590 the ABI of any libraries that are part of the GNU C Library, but it may
2591 affect the ABI of other libraries that use this type in their interfaces,
2592 if they are compiled or used with those options.
2594 * The getentropy and getrandom functions, and the <sys/random.h> header file
2597 * The buffer size for byte-oriented stdio streams is now limited to 8192
2598 bytes by default. Previously, on Linux, the default buffer size on most
2599 file systems was 4096 bytes (and thus remains unchanged), except on
2600 network file systems, where the buffer size was unpredictable and could be
2601 as large as several megabytes.
2603 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2604 for the Linux quota interface which predates kernel version 2.4.22 has
2607 * The malloc_get_state and malloc_set_state functions have been removed.
2608 Already-existing binaries that dynamically link to these functions will
2609 get a hidden implementation in which malloc_get_state is a stub. As far
2610 as we know, these functions are used only by GNU Emacs and this change
2611 will not adversely affect already-built Emacs executables. Any undumped
2612 Emacs executables, which normally exist only during an Emacs build, should
2613 be rebuilt by re-running “./configure; make” in the Emacs build tree.
2615 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
2616 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2617 “no-ip6-dotint” had already been the default, and support for the
2618 “ip6-dotint” option was removed from the Internet in 2006.
2620 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2621 flag from <resolv.h> have been removed. The option relied on a
2622 backwards-incompatible DNS extension which was never deployed on the
2625 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2626 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2627 They were already unimplemented.
2629 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2630 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2631 removed again from the IETF name lookup interface specification in RFC
2632 2553. Applications should use getaddrinfo instead.
2634 * DNSSEC-related declarations and definitions have been removed from the
2635 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2636 decode the data part of DNSSEC record types. Previous versions of glibc
2637 only implemented minimal support for the previous version of DNSSEC, which
2638 is incompatible with the currently deployed version.
2640 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2641 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2642 <arpa/nameser.h> header file because the distinction between RR types and
2643 meta-RR types is not officially standardized, subject to revision, and
2644 thus not suitable for encoding in a macro.
2646 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2647 and rhook members of the res_state type in <resolv.h> have been removed.
2648 The glibc stub resolver did not support these hooks, but the header file
2649 did not reflect that.
2651 * For multi-arch support it is recommended to use a GCC which has
2652 been built with support for GNU indirect functions. This ensures
2653 that correct debugging information is generated for functions
2654 selected by IFUNC resolvers. This support can either be enabled by
2655 configuring GCC with '--enable-gnu-indirect-function', or by
2656 enabling it by default by setting 'default_gnu_indirect_function'
2657 variable for a particular architecture in the GCC source file
2660 * GDB pretty printers have been added for mutex and condition variable
2661 structures in POSIX Threads. When installed and loaded in gdb these pretty
2662 printers show various pthread variables in human-readable form when read
2663 using the 'print' or 'display' commands in gdb.
2665 * Tunables feature added to allow tweaking of the runtime for an application
2666 program. This feature can be enabled with the '--enable-tunables' configure
2667 flag. The GNU C Library manual has details on usage and README.tunables has
2668 instructions on adding new tunables to the library.
2670 * A new version of condition variables functions have been implemented in
2671 the NPTL implementation of POSIX Threads to provide stronger ordering
2674 * A new version of pthread_rwlock functions have been implemented to use a more
2675 scalable algorithm primarily through not using a critical section anymore to
2678 Security related changes:
2680 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2681 have been created with makecontext could fail to terminate due to a
2682 missing .cantunwind annotation. This has been observed to lead to a hang
2683 (denial of service) in some Go applications compiled with gccgo. Reported
2684 by Andreas Schwab. (CVE-2016-6323)
2686 * The DNS stub resolver functions would crash due to a NULL pointer
2687 dereference when processing a query with a valid DNS question type which
2688 was used internally in the implementation. The stub resolver now uses a
2689 question type which is outside the range of valid question type values.
2692 The following bugs are resolved with this release:
2694 [4099] stdio: Overly agressive caching by stream i/o functions.
2695 [7065] build: Support building glibc with -fstack-protector or -fstack-
2697 [9842] localedata: en_CA: incorrect date format
2698 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2699 before it started waiting
2700 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2701 [15765] nptl: sem_open is wrongly a cancellation point
2702 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2703 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2705 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2706 library linked with pthread
2707 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2708 "FIXME: Ingo" issue)
2709 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2710 [17252] libc: getrandom and getentropy syscall
2711 [17730] malloc: thread-local storage is sometimes improperly free()'d
2712 after being __libc_memalign()'d
2713 [18241] stdio: failed fseek on memstream does not set errno and can fail
2715 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2717 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2718 PTHREAD_PRIO_INHERIT mutex on ARM
2719 [18784] network: res_query and related function crash for special record
2720 type queries (CVE-2015-5180)
2721 [19380] math: strtod does not raise "inexact"
2722 [19387] string: Integer overflow in memchr
2723 [19390] string: Integer overflow in strncat
2724 [19398] build: linknamespace tests fail with massively parallel build
2725 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2727 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2728 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2729 [19514] libc: [PATCH] Fix spelling errors in spelling
2730 "implement"/"implementation" in several places
2731 [19582] network: Deprecate RES_USE_INET6
2732 [19673] manual: clog10 docs appear to be erroneous
2733 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2734 causes a segmentation fault
2735 [19826] libc: invalid pointer returned from __tls_get_addr with static
2737 [20016] network: resolv: Remove hooks support from the API
2738 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2740 [20033] math: [x86_64] vectorized math function don't call the __finite
2742 [20116] nptl: use after free in pthread_create
2743 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2744 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2746 [20311] nptl: please install proc_service.h
2747 [20366] libc: Compilation errors in installed headers in strict-compliance
2749 [20370] malloc: malloc: Arena free list management is still racy
2750 (incorrect fix in bug 19243)
2751 [20386] libc: assert (X = 0) does not result in GCC warning
2752 [20432] malloc: malloc: Minimize interface required for interposition
2753 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2754 in _Unwind_Backtrace (CVE-2016-6323)
2755 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2756 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2758 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2759 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2760 [20477] network: resolv: incorrect double-checked locking related to
2762 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2764 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2766 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2767 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2768 cause transition penalty
2769 [20517] math: sparcv9 missing fdiml compat symbol
2770 [20524] manual: strverscmp is inconsistent
2771 [20525] libc: <sys/quota.h> should be based on kernel headers
2772 [20539] math: GCC 7 -static -lm fails to link at -O3
2773 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2775 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2777 [20591] network: Remove obsolete DNSSEC support
2778 [20592] network: DNS resource record type classification macros in
2779 <arpa/nameser.h> are incorrect
2780 [20593] network: Update DNS RR type definitions
2781 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2782 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2784 [20629] network: libresolv: Remove support for bitstring labels
2786 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2787 assertion: "maxidx >= 2"
2788 [20660] math: [arm] Use VSQRT
2789 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2790 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2791 [20689] libc: Test for FMA should also check for AVX.
2792 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2793 [20715] math: iszero macro breaks existing code
2794 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2795 [20728] libc: powerpc: Missing TOC stub in clone
2796 [20729] build: glibc-2.24 fails to build for i486 with -Os
2797 [20750] build: Build fails with default PIE enabled gcc-6.x
2798 [20768] math: [alpha] sqrt fegetenv namespace
2799 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2801 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2802 __FLT_EVAL_METHOD__ is 2
2803 [20790] network: rpcgen buffer overrun in get_prog_declaration
2804 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2805 [20829] libc: crypt snprintf namespace
2806 [20847] libc: tst-vfork3 failure
2807 [20855] math: Default bits/mathdef.h has inappropriate float_t
2808 [20859] math: [sh4] FP_ILOGB0 invalid
2809 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2810 U+20AC), not same as GBK
2811 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2812 [20916] math: pow handling of sNaN arguments
2813 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2814 [20919] math: Bad pow (qNaN, 0) result with -lieee
2815 [20940] math: hypot sNaN handling
2816 [20947] math: fmax, fmin sNaN handling
2817 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2818 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2820 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2821 [20973] nptl: robust mutexes: Lost wake-ups
2822 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2823 [20978] nis: strlen on null pointer in nss_nisplus
2824 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2826 [21014] string: i686 memchr overflows internal pointer check
2827 [21019] libc: [mips] n32 lseek incorrect on overflow
2828 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2829 [21026] libc: [MIPS] readahead syscall is broken on n64
2830 [21028] math: Fallback fesetexceptflag should always succeed
2831 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2832 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2834 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2835 [21061] librt: [microblaze] librt lost clock_* exports
2836 [21073] libc: tunables: insecure environment variables passed to
2837 subprocesses with AT_SECURE
2838 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2842 * The minimum Linux kernel version that this version of the GNU C Library
2843 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2844 kernel version 2.6.32 or later suffices (on architectures that already
2845 required kernel versions more recent than 3.2, those requirements remain
2846 unchanged). Linux 3.2 or later kernel headers are required on all
2849 * The pap_AN locale has been deleted. This has been deprecated for a long
2850 time. It has been replaced by pap_AW & pap_CW, both of which have long
2851 been included in previous releases.
2853 * The readdir_r and readdir64_r functions have been deprecated. It is
2854 recommended to use readdir and readdir64 instead.
2856 * The type “union wait” has been removed. It was deprecated in the early
2857 1990s and never part of POSIX. Application code should use the int type
2858 instead of “union wait”.
2860 * A new NSS action is added to facilitate large distributed system
2861 administration. The action, MERGE, allows remote user stores like LDAP
2862 to be merged into local user stores like /etc/groups in order to provide
2863 easy to use, updated, and managed sets of merged credentials. The new
2864 action can be used by configuring it in /etc/nsswitch.conf:
2865 group: files [SUCCESS=merge] nis
2866 Implemented by Stephen Gallagher (Red Hat).
2868 * The deprecated __malloc_initialize_hook variable has been removed from the
2871 * The long unused localedef --old-style option has been removed. It hasn't
2872 done anything in over 16 years. Scripts using this option can safely
2875 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2876 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2877 return the next representable value in the direction of positive infinity
2878 and the nextdown functions return the next representable value in the
2879 direction of negative infinity. These are currently enabled as GNU
2882 Security related changes:
2884 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2885 could result in a stack overflow when getnetbyname was called with an
2886 overly long name. (CVE-2016-3075)
2888 * Previously, getaddrinfo copied large amounts of address data to the stack,
2889 even after the fix for CVE-2013-4458 has been applied, potentially
2890 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2891 instead. Reported by Michael Petlan. (CVE-2016-3706)
2893 * The glob function suffered from a stack-based buffer overflow when it was
2894 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2895 Reported by Alexander Cherepanov. (CVE-2016-1234)
2897 * The Sun RPC UDP client could exhaust all available stack space when
2898 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2899 alloca plugin for GCC. (CVE-2016-4429)
2901 * The IPv6 name server management code in libresolv could result in a memory
2902 leak for each thread which is created, performs a failing naming lookup,
2903 and exits. Over time, this could result in a denial of service due to
2904 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2906 The following bugs are resolved with this release:
2908 [1170] localedata: ne_NP: update Nepali locale definition file
2909 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2911 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2912 [6796] math: fdim() does not set errno on overflow
2913 [10354] libc: posix_spawn should use vfork() in more cases than presently
2914 [11213] localedata: localedata: add copyright disclaimer to locale files
2915 [12143] localedata: chr_US: new Cherokee locale
2916 [12450] localedata: sgs_LT: new locale
2917 [12676] localedata: ln_CD: new locale
2918 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2920 [13304] math: fma, fmaf, fmal produce wrong results
2921 [14259] build: --localedir arg to configure is ignored
2922 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2923 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2924 [14934] localedata: es_CL: wrong first weekday chilean locale
2925 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2927 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2929 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2930 [15368] nptl: raise() is not async-signal-safe
2931 [15479] math: ceil, floor, round and trunc raise inexact exception
2932 [15578] localedata: kk_KZ: various updates
2933 [16003] localedata: pap_AN: punt old locale
2934 [16137] localedata: iw_IL: punt old locale
2935 [16190] localedata: eo: new esperanto locale
2936 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2937 [16742] malloc: race condition: pthread_atfork() called before first
2938 malloc() results in unexpected locking behaviour/deadlocks
2939 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2941 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2942 [17565] localedata: pt_PT: wrong (work-)week start
2943 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2944 [17950] build: Build fails with -msse
2945 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2946 [18433] libc: posix_spawn does not return correctly upon failure to
2948 [18453] localedata: charmaps/IBM875: incorrect codes
2949 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2951 [18896] localedata: he_IL: improvements for currency
2952 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2953 Romanian locale data
2954 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2956 [19056] libc: Deprecate readdir_r
2957 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2959 [19198] localedata: nl_NL: small improvements for Dutch locales
2960 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2961 nameservers (CVE-2016-5417)
2962 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2964 [19400] locale: Language missing in "iso-639.def", trivial fix in
2966 [19431] malloc: Deadlock between fflush, getdelim, and fork
2967 [19505] libc: Incorrect file descriptor validity checks in
2968 posix_spawn_file_actions_add{open,close,dup2}
2969 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2970 when using RTLD_NEXT
2971 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2972 `intl/{gettextP,loadinfo}.h'
2973 [19534] libc: execle, execlp may use malloc
2974 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2975 [19573] network: res_nclose and __res_maybe_init disagree about name
2976 server initialization, breaking Hesiod
2977 [19575] localedata: Status of GB18030 tables
2978 [19581] localedata: sr_* date_fmt string contains additional newline
2979 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2981 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2982 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2983 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2984 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2986 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2988 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2990 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2991 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2992 [19633] locale: strfmon_l applies global locale to number formatting
2993 [19642] network: Memory leak in getnameinfo
2994 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2995 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2997 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2998 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
3000 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
3001 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
3003 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
3005 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
3007 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
3008 pointers and lengths in error-case.
3009 [19727] locale: Converting from/to UTF-xx with iconv() does not always
3010 report errors on UTF-16 surrogates values.
3011 [19755] nscd: nscd assertion failure in gc
3012 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
3013 [19759] libc: mempcpy shouldn't be inlined
3014 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
3015 [19765] libc: s390 needs an optimized mempcpy
3016 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
3017 NAME_MAX limit assumption (CVE-2016-1234)
3018 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
3019 [19787] network: Missing and incorrect truncation checks in getnameinfo
3020 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
3022 [19791] network: Assertion failure in res_query.c with un-connectable name
3024 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
3025 [19822] math: libm.so install clobbers old version
3026 [19825] network: resolv: send_vc can return uninitialized data in second
3027 response to getaddrinfo
3028 [19830] network: nss_dns: should check RDATA length against buffer length
3029 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
3030 confronted with A/AAAA records of invalid size
3031 [19837] nss: nss_db: No retries for some long lines with a larger buffer
3032 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
3033 [19853] stdio: Printing IBM long double in decimal with high precision is
3035 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
3036 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
3037 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
3039 [19865] network: Assertion failure or memory leak in
3040 _nss_dns_getcanonname_r
3041 [19868] network: nss_dns: netent code does not skip over non-PTR records
3042 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
3044 [19881] string: Improve x86-64 memset
3045 [19907] string: Incorrect memcpy tests
3046 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
3048 [19925] libc: termios.h XCASE namespace
3049 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
3050 [19929] libc: limits.h NL_NMAX namespace
3051 [19931] stdio: Memory leak in vfprintf
3052 [19957] libc: clone(CLONE_VM) access invalid parent memory
3053 [19963] localedata: en_IL: New locale
3054 [19989] stdio: stdio.h cuserid namespace
3055 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
3057 [19996] locale: langinfo.h nl_langinfo_l namespace
3058 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
3059 [20010] network: getaddrinfo: Stack overflow in hostent translation
3061 [20012] stdio: libio: fmemopen append mode failure
3062 [20014] stdio: stdio.h namespace for pre-threads POSIX
3063 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
3064 [20023] libc: fcntl.h timespec namespace
3065 [20024] math: [x86_64] vectorized sincos trashes the stack
3066 [20031] network: nss_hesiod: Heap overflow in get_txt_records
3067 [20041] time: sys/time.h timespec namespace
3068 [20043] libc: unistd.h missing cuserid for UNIX98 and before
3069 [20044] libc: unistd.h missing pthread_atfork for UNIX98
3070 [20051] libc: ttyslot in wrong header under wrong conditions
3071 [20054] libc: gethostname not declared for XPG4
3072 [20055] libc: termios.h missing tcgetsid for XPG4
3073 [20072] dynamic-link: x86 init_cpu_features is called twice in static
3075 [20073] libc: sys/stat.h fchmod namespace
3076 [20074] libc: stdlib.h rand_r namespace
3077 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
3078 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
3080 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
3081 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
3083 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
3084 [20119] libc: Wrong mask for processors level type from CPUID
3085 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
3086 AS not supporting AVX512
3087 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
3089 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
3090 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
3092 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
3093 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
3094 [20178] libc: posix_spawn{p} should not call exit
3095 [20191] stdio: libio: vtables hardening
3096 [20195] string: FMA4 detection requires CPUID execution with register
3098 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
3099 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
3101 [20212] math: acos (sNaN) returns sNaN
3102 [20213] math: asin (sNaN) returns sNaN
3103 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
3104 [20218] math: [i386] asinhl (sNaN) returns sNaN
3105 [20219] math: [i386] atanhl (sNaN) returns sNaN
3106 [20222] stdio: fopencookie: Mangle function pointers
3107 [20224] math: [i386] cbrtl (sNaN) returns sNaN
3108 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
3109 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
3111 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
3112 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
3113 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
3114 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
3115 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
3116 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
3117 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
3118 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
3119 [20240] math: modf (sNaN) returns sNaN
3120 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
3121 [20250] math: frexp (sNaN) returns sNaN
3122 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
3123 [20255] math: [i386] fdim, fdimf return with excess range and precision /
3125 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
3126 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
3127 subscript is below array bounds [-Werror=array-bounds]
3128 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
3129 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
3131 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
3132 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
3134 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
3135 "invalid" exceptions
3136 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
3137 [20316] localedata: id_ID: Februari instead of Pebruari
3138 [20327] string: POWER8 strcasecmp returns incorrect result
3139 [20347] math: Failure: Test: j0_downward (0xap+0)
3140 [20348] libc: FAIL: misc/tst-preadvwritev64
3141 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
3142 [20350] libc: There is no test for p{read,write}64
3143 [20357] math: Incorrect cos result for 1.5174239687223976
3144 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
3148 * Unicode 8.0.0 Support: Character encoding, character type info, and
3149 transliteration tables are all updated to Unicode 8.0.0, using new
3150 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
3151 These updates cause user visible changes, such as the fixes for bugs
3152 89, 16061, and 18568.
3154 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
3155 kernel-internal CPU set size. This means that requests that change the
3156 CPU affinity which failed before (for example, an all-ones CPU mask) will
3157 now succeed. Applications that need to determine the effective CPU
3158 affinities need to call sched_getaffinity or pthread_getaffinity_np after
3159 setting it because the kernel can adjust it (and the previous size check
3160 would not detect this in the majority of cases).
3162 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
3163 the following new symbols are used: fts64_children, fts64_close,
3164 fts64_open, fts64_read and fts64_set.
3166 * getaddrinfo now detects certain invalid responses on an internal netlink
3167 socket. If such responses are received, an affected process will
3168 terminate with an error message of "Unexpected error <number> on netlink
3169 descriptor <number>" or "Unexpected netlink response of size <number> on
3170 descriptor <number>". The most likely cause for these errors is a
3171 multi-threaded application which erroneously closes and reuses the netlink
3172 file descriptor while it is used by getaddrinfo.
3174 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
3175 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
3176 unnecessary serialization of memory allocation requests across threads.
3177 The defect is now corrected. Users should see a substantial increase in
3178 the concurent throughput of allocation requests for applications which
3179 trigger this bug. Affected applications typically create and
3180 destroy threads frequently. (Bug 19048 was reported and analyzed by
3183 * There is now a --disable-timezone-tools configure option for disabling the
3184 building and installing of the timezone related utilities (zic, zdump, and
3185 tzselect). This is useful for people who build the timezone data and code
3186 independent of the GNU C Library.
3188 * The obsolete header <regexp.h> has been removed. Programs that require
3189 this header must be updated to use <regex.h> instead.
3191 * The obsolete functions bdflush, create_module, get_kernel_syms,
3192 query_module and uselib are no longer available to newly linked binaries;
3193 the header <sys/kdaemon.h> has been removed. These functions and header
3194 were specific to systems using the Linux kernel and could not usefully be
3195 used with the GNU C Library on systems with version 2.6 or later of the
3198 * Optimized string, wcsmbs and memory functions for IBM z13.
3199 Implemented by Stefan Liebler.
3201 * Newly linked programs that define a variable called signgam will no longer
3202 have it set by the lgamma, lgammaf and lgammal functions. Programs that
3203 require signgam to be set by those functions must ensure that they use the
3204 variable provided by the GNU C Library and declared in <math.h>, without
3205 defining their own copy.
3207 * The minimum GCC version that can be used to build this version of the GNU
3208 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
3209 still be used to compile programs using the GNU C Library.
3211 Security related changes:
3213 * An out-of-bounds value in a broken-out struct tm argument to strftime no
3214 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
3216 * The LD_POINTER_GUARD environment variable can no longer be used to disable
3217 the pointer guard feature. It is always enabled. Previously,
3218 LD_POINTER_GUARD could be used to disable security hardening in binaries
3219 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
3222 * An integer overflow in hcreate and hcreate_r could lead to an
3223 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
3225 * The catopen function no longer has unbounded stack usage. Reported by
3226 Max. (CVE-2015-8779)
3228 * The nan, nanf and nanl functions no longer have unbounded stack usage
3229 depending on the length of the string passed as an argument to the
3230 functions. Reported by Joseph Myers. (CVE-2014-9761)
3232 * A stack-based buffer overflow was found in libresolv when invoked from
3233 libnss_dns, allowing specially crafted DNS responses to seize control
3234 of execution flow in the DNS client. The buffer overflow occurs in
3235 the functions send_dg (send datagram) and send_vc (send TCP) for the
3236 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
3237 family. The use of AF_UNSPEC triggers the low-level resolver code to
3238 send out two parallel queries for A and AAAA. A mismanagement of the
3239 buffers used for those queries could result in the response of a query
3240 writing beyond the alloca allocated buffer created by
3241 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
3242 the overflow. Thanks to the Google Security Team and Red Hat for
3243 reporting the security impact of this issue, and Robert Holiday of
3244 Ciena for reporting the related bug 18665. (CVE-2015-7547)
3246 The following bugs are resolved with this release:
3248 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
3249 [887] math: Math library function "logb" and "nextafter" inconsistent
3250 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
3251 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
3252 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
3253 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
3255 [4404] localedata: German translation of "Alarm clock" is misleading
3256 [6799] math: nextafter() and nexttoward() doen't set errno on
3257 overflow/underflow errors
3258 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3260 [10432] nis: _nss_nis_setnetgrent assertion failure
3261 [11460] libc: fts has no LFS support
3262 [12926] network: getaddrinfo()/make_request() may spin forever
3263 [13065] nptl: Race condition in pthread barriers
3264 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3265 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3267 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3268 [14912] libc: Rename non-installed bits/*.h headers
3269 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3270 [15367] math: Let gcc use __builtin_isinf
3271 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3272 [15421] math: lgamma wrongly sets signgam for ISO C
3273 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3274 FE_INVALID with argument out of range
3275 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3277 [15786] dynamic-link: ifunc resolver functions can smash function
3279 [15918] math: Unnecessary check for equality in hypotf()
3280 [16061] localedata: Review / update transliteration data
3281 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3283 [16141] time: strptime %z offset restriction
3284 [16171] math: drem should be alias of remainder
3285 [16296] math: fegetround is pure?
3286 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3287 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3289 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3290 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3292 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3293 "Exception "Inexact" set" on ppc32
3294 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3295 [16517] math: Missing underflow exception from tanf/tan/tanl
3296 [16519] math: Missing underflow exception from sinhf
3297 [16520] math: Missing underflow exception from tanhf
3298 [16521] math: Missing underflow exception from exp2
3299 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3301 [16734] stdio: fopen calls mmap to allocate its buffer
3302 [16961] math: nan function incorrect handling of bad sequences
3303 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3304 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3305 [16985] locale: localedef: confusing error message when opening output
3307 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3308 [17197] locale: Redundant shift character in iconv conversion output at
3310 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3311 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3312 [17250] dynamic-link: static linking breaks nss loading
3313 (getaddrinfo/getpwnam/etc...)
3314 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3316 [17441] math: isnan() should use __builtin_isnan() in GCC
3317 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3318 (related to lock elision)
3319 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3320 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3321 [17887] time: strptime should be able to parse "+01:00" style timezones
3322 [17905] libc: catopen() Multiple unbounded stack allocations
3324 [18084] libc: backtrace (..., 0) dumps core on x86
3325 [18086] libc: nice() sets errno to 0 on success
3326 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3327 is too large (CVE-2015-8778)
3328 [18251] dynamic-link: SONAME missing when audit modules provides path
3329 [18265] libc: add attributes for wchar string and memory functions
3330 [18370] math: csqrt missing underflows
3331 [18421] libc: [hppa] read-only segment has dynamic relocations
3332 [18472] libc: Obsolete syscall wrappers should be compat symbols
3333 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3334 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3335 [18525] localedata: Remove locale timezone information
3336 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3337 [18568] localedata: Update locale data to Unicode 8.0
3338 [18589] locale: sort-test.sh fails at random
3339 [18595] math: ctan, ctanh missing underflows
3340 [18604] libc: assert macro-expands its argument
3341 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3342 contains a vector instruction exception.
3343 [18611] math: j1, jn missing errno setting on underflow
3344 [18618] localedata: sync Chechen locale definitions with other *_RU
3346 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3347 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3348 [18665] network: In send_dg, the recvfrom function is NOT always using the
3349 buffer size of a newly created buffer (CVE-2015-7547)
3350 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3352 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3354 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3355 [18699] math: tilegx cproj() for various complex infinities does not yield
3357 [18724] libc: Harden put*ent functions against data injection
3358 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3359 [18755] build: build errors with -DNDEBUG
3360 [18757] stdio: fmemopen fails to set errno on failure
3361 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3363 [18781] libc: openat64 lacks O_LARGEFILE
3364 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3365 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3366 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3367 [18790] math: [ldbl-128ibm] tanhl inaccurate
3368 [18795] libc: stpncpy fortification misses buffer lengths that are
3369 statically too large
3370 [18796] build: build fails for --disable-mathvec
3371 [18803] math: hypot missing underflows
3372 [18820] stdio: fmemopen may leak memory on failure
3373 [18823] math: csqrt spurious underflows
3374 [18824] math: fma spurious underflows
3375 [18825] math: pow missing underflows
3376 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3377 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3378 [18870] build: sem_open.c fails to compile with missing symbol
3380 [18872] stdio: Fix memory leak in printf_positional
3381 [18873] libc: posix_fallocate overflow check ineffective
3382 [18875] math: Excess precision leads incorrect libm
3383 [18877] libc: arm: mmap offset regression
3384 [18887] libc: memory corruption when using getmntent on blank lines
3385 [18918] localedata: hu_HU: change time to HH:MM:SS format
3386 [18921] libc: Regression: extraneous stat() and fstat() performed by
3388 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3389 binaries (CVE-2015-8777)
3390 [18951] math: tgamma missing underflows
3391 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3393 [18953] localedata: lt_LT: change currency symbol to the euro
3394 [18956] math: powf inaccuracy
3395 [18961] math: [i386] exp missing underflows
3396 [18966] math: [i386] exp10 missing underflows
3397 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3398 [18969] build: multiple string test failures due to missing locale
3400 [18970] libc: Reference of pthread_setcancelstate in libc.a
3401 [18977] math: float / long double Bessel functions not in XSI POSIX
3402 [18980] math: i386 libm functions return with excess range and precision
3403 [18981] math: i386 scalb*, ldexp return with excess range and precision
3404 [18982] stdio: va_list and vprintf
3405 [18985] time: Passing out of range data to strftime() causes a segfault
3407 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3408 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3409 [19012] locale: iconv_open leaks memory on error path
3410 [19016] math: clog, clog10 inaccuracy
3411 [19018] nptl: Mangle function pointers in tls_dtor_list
3412 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3413 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3414 [19048] malloc: malloc: arena free list can become cyclic, increasing
3416 [19049] math: [powerpc] erfc incorrect zero sign
3417 [19050] math: [powerpc] log* incorrect zero sign
3418 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3419 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3420 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3421 [19074] network: Data race in _res_hconf_reorder_addrs
3422 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3423 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3424 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3426 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3428 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3429 [19086] manual: posix_fallocate64 documented argument order is wrong.
3430 [19088] math: lround, llround missing exceptions close to overflow
3432 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3433 [19095] math: dbl-64 lrint incorrect for 64-bit long
3434 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3435 [19124] dynamic-link: ld.so failed to build with older assmebler
3436 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3437 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3438 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3439 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3440 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3441 pthread_setaffinity_np
3442 [19156] math: [ldbl-128] j0l spurious underflows
3443 [19164] nptl: tst-getcpu fails with many possible CPUs
3444 [19168] math: math/test-ildoubl and math/test-ldouble failure
3445 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3446 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3448 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3449 (FE_NOMASK_ENV) do not clear SSE exceptions
3450 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3451 _int_new_arena/reused_arena
3452 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3453 [19201] math: dbl-64 remainder incorrect sign of zero result
3454 [19205] math: bits/math-finite.h conditions do not match math.h and
3456 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3457 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3458 for C99-based standards
3459 [19212] libc: features.h not -Wundef clean
3460 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3462 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3463 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3464 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3466 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3467 "inexact" exceptions
3468 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3470 [19242] libc: strtol incorrect in Turkish locales
3471 [19243] malloc: reused_arena can pick an arena on the free list, leading
3472 to an assertion failure and reference count corruption
3473 [19253] time: tzset() ineffective when temporary TZ did not include DST
3475 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3476 [19270] math: [hppa] Shared libm missing __isnanl
3477 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3478 MAP_HUGETLB and MAP_STACK defines
3479 [19313] nptl: Wrong __cpu_mask for x32
3480 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3481 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3482 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3483 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3484 [19363] time: x32: times() return value wrongly truncates/sign extends
3486 [19367] dynamic-link: Improve branch prediction on Silvermont
3487 [19369] network: Default domain name not reset by res_ninit when "search"
3488 / "domain" entry is removed from resolv.conf
3489 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3491 [19385] localedata: bg_BG: time separator should be colon, not comma
3492 [19408] libc: linux personality syscall wrapper may erroneously return an
3493 error on 32-bit architectures
3494 [19415] libc: dladdr returns wrong names on hppa
3495 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3496 IBM905, IBM907, and IBM909
3497 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3498 [19443] build: build failures with -DDEBUG
3499 [19451] build: Make check fails on test-double-vlen2
3500 [19462] libc: Glibc failed to build with -Os
3501 [19465] math: Wrong code with -Os
3502 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3504 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3506 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3507 [19486] math: S390: Math tests fail with "Exception Inexact set".
3508 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3509 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3511 [19590] math: Fail to build shared objects that use libmvec.so functions.
3515 * The following bugs are resolved with this release:
3517 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3518 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3519 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3520 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3521 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3522 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3523 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3524 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3525 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3526 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3527 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3528 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3529 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3530 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3531 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3532 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3533 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3534 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3535 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3536 18657, 18676, 18694, 18696, 18887.
3538 * Cache information can be queried via sysconf() function on s390 e.g. with
3539 _SC_LEVEL1_ICACHE_SIZE as argument.
3541 * A buffer overflow in gethostbyname_r and related functions performing DNS
3542 requests has been fixed. If the NSS functions were called with a
3543 misaligned buffer, the buffer length change due to pointer alignment was
3544 not taken into account. This could result in application crashes or,
3545 potentially arbitrary code execution, using crafted, but syntactically
3546 valid DNS responses. (CVE-2015-1781)
3548 * The time zone file parser has been made more robust against crafted time
3549 zone files, avoiding heap buffer overflows related to the processing of
3550 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3551 large time zone data files. Overly long time zone specifiers in the TZ
3552 variable no longer result in stack overflows and crashes.
3554 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3555 for LD and GD on x86 and x86-64, has been implemented. You will need
3556 binutils-2.24 or later to enable this optimization.
3558 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3559 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3560 Hat). These updates cause user visible changes, such as the fix for bug
3563 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3564 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3565 condition in some applications.
3567 * Added vector math library named libmvec with the following vectorized x86_64
3568 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3570 The library can be disabled with --disable-mathvec. Use of the functions is
3571 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3572 Shared library libmvec.so is linked in as needed when using -lm (no need to
3573 specify -lmvec explicitly for not static builds).
3574 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3576 * A new fmemopen implementation has been added with the goal of POSIX
3577 compliance. The new implementation fixes the following long-standing
3578 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3579 old implementation is still present for use be by existing binaries.
3581 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3582 releases. It has been fixed to match 2.19 and older, but binaries built
3583 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3585 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3586 Contributed by Roland McGrath (Google).
3588 * The header <regexp.h> is deprecated, and will be removed in a future
3589 release. Use of this header will trigger a deprecation warning.
3590 Application developers should update their code to use <regex.h> instead.
3592 This header was formerly part of SUS, but was deprecated in 1994 and
3593 removed from the standard in 2001. Also, the glibc implementation
3594 leaks memory. See BZ#18681 for more details.
3598 * The following bugs are resolved with this release:
3600 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3601 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3602 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3603 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3604 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3605 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3606 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3607 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3608 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3609 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3612 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3613 too little memory for the to-be-scanned arguments and overflow the
3614 allocated buffer. The implementation now correctly computes the required
3615 buffer size when using malloc, and switches to malloc from alloca as
3618 * A new semaphore algorithm has been implemented in generic C code for all
3619 machines. Previous custom assembly implementations of semaphore were
3620 difficult to reason about or ensure that they were safe. The new version
3621 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3622 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3623 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3625 * Port to Altera Nios II has been contributed by Mentor Graphics.
3627 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3628 implementations for powerpc64/powerpc64le.
3629 Implemented by Adhemerval Zanella (IBM).
3631 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3632 and powerpc64le. This may improve lock scaling of existing programs on
3633 HTM capable systems. The lock elision code is only enabled with
3634 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3635 powerpc will issue a transaction abort on every syscall to avoid side
3636 effects being visible outside transactions.
3638 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3639 AArch64. Contributed by ARM Ltd.
3641 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3643 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3644 under certain input conditions resulting in the execution of a shell for
3645 command substitution when the application did not request it. The
3646 implementation now checks WRDE_NOCMD immediately before executing the
3647 shell and returns the error WRDE_CMDSUB as expected.
3649 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3650 processing format strings with a large number of format specifiers.
3652 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3653 infinite loop if the DNS response contained a PTR record of an unexpected
3656 * The minimum GCC version that can be used to build this version of the GNU
3657 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3658 still be used to compile programs using the GNU C Library.
3660 * The GNU C Library is now built with -Werror by default. This can be
3661 disabled by configuring with --disable-werror.
3663 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3665 * The obsolete sigvec function has been removed. This was the original
3666 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3667 programs have been using instead for about 25 years. Of course, ABI
3668 compatibility for old binaries using sigvec remains intact.
3670 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3671 with newer versions of bison.
3673 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3674 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3675 registers overlay two consecutive single-precision registers. MIPS32R2
3676 introduced a new FPU mode (FR=1) where double-precision registers extend the
3677 corresponding single-precision registers which is incompatible with the
3678 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3679 require the use of FR=1 making a transition necessary. New o32 ABI
3680 extensions enable users to migrate over time from the original o32 ABI
3681 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3682 tracks the ABI of any loaded object and verifies that new objects are
3683 compatible. Mode transitions will also be requested as required and
3684 unsupportable objects will be rejected. The ABI checks include both soft and
3685 hard float ABIs for o32, n32 and n64.
3687 GCC 5 with GNU binutils 2.25 onwards:
3688 It is strongly recommended that all o32 system libraries are built using the
3689 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3690 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3691 compiler using --with-fp-32=xx to set this by default.
3695 * The following bugs are resolved with this release:
3697 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3698 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3699 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3700 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3701 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3702 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3703 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3704 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3705 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3706 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3707 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3708 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3709 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3710 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3711 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3713 * Reverted change of ABI data structures for s390 and s390x:
3714 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3715 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3716 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3717 are preserved pointing straight to the same implementation as the old ones.
3718 Given that, new callers will simply provide a too-big buffer to these
3719 functions. Any applications/libraries out there that embed jmp_buf or
3720 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3721 against 2.19 headers will have to rebuilt again. This is necessary in any
3722 case to revert the breakage in their ABI caused by the glibc change.
3724 * Support for file description locks is added to systems running the
3725 Linux kernel. The standard file locking interfaces are extended to
3726 operate on file descriptions, not file descriptors, via the use of
3727 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3728 are associated with an open file instead of a process.
3730 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3732 * The minimum Linux kernel version that this version of the GNU C Library
3733 can be used with is 2.6.32.
3735 * Running the testsuite no longer terminates as soon as a test fails.
3736 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3737 with PASS or FAIL lines for individual tests. A summary of the results is
3738 printed, including a list of failing lists, and "make check" exits with
3739 error status if there were any unexpected failures. "make check
3740 stop-on-test-failure=y" may be used to keep the old behavior.
3742 * The am33 port, which had not worked for several years, has been removed
3745 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3746 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3747 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3748 conflicted with POSIX (support for which was removed in 2.19), the
3749 interfaces those macros enabled remain available when compiling with
3750 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3751 test macros defined.
3753 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3755 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3756 This may improve lock scaling of existing programs on TX capable systems.
3757 The lock elision code is only built with --enable-lock-elision=yes and
3758 then requires a GCC version supporting the TX builtins. With lock elision
3759 default mutexes are elided via __builtin_tbegin, if the cpu supports
3760 transactions. By default lock elision is not enabled and the elision code
3763 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3764 copy the path argument. This allowed programs to cause posix_spawn to
3765 deference a dangling pointer, or use an unexpected pathname argument if
3766 the string was modified after the posix_spawn_file_actions_addopen
3769 * All supported architectures now use the main glibc sysdeps directory
3770 instead of some being in a separate "ports" directory (which was
3771 distributed separately before glibc 2.17).
3773 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3774 On configurations that support it (all Linux configurations), it's now
3775 used regardless of the --enable-add-ons switch to configure. It is no
3776 longer possible to build such configurations without pthreads support.
3778 * Locale names, including those obtained from environment variables (LANG
3779 and the LC_* variables), are more tightly checked for proper syntax.
3780 setlocale will now fail (with EINVAL) for locale names that are overly
3781 long, contain slashes without starting with a slash, or contain ".." path
3782 components. (CVE-2014-0475) Previously, some valid locale names were
3783 silently replaced with the "C" locale when running in AT_SECURE mode
3784 (e.g., in a SUID program). This is no longer necessary because of the
3787 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3788 with application code using Intel MPX instructions. (With all previous
3789 versions, the MPX register state could be clobbered when making calls
3790 into or out of a shared library.) Note that while the new dynamic
3791 linker is compatible with all known x86 hardware whether or not it
3792 supports Intel MPX, some x86 instruction-set emulators might fail to
3793 handle the new instruction encodings. This is known to affect Valgrind
3794 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3795 release), and might affect other tools that do instruction emulation.
3797 * Support for loadable gconv transliteration modules has been removed.
3798 The support for transliteration modules has been non-functional for
3799 over a decade, and the removal is prompted by security defects. The
3800 normal gconv conversion modules are still supported. Transliteration
3801 with //TRANSLIT is still possible, and the //IGNORE specifier
3802 continues to be supported. (CVE-2014-5119)
3804 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3805 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3806 resulting a denial-of-service security vulnerability in applications which
3807 use functions related to iconv. (CVE-2014-6040)
3811 * The following bugs are resolved with this release:
3813 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3814 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3815 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3816 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3817 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3818 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3819 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3820 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3821 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3822 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3823 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3824 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3825 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3826 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3827 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3828 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3829 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3830 16431, 16453, 16474, 16506, 16510, 16529
3832 * Slovenian translations for glibc messages have been contributed by the
3833 Translation Project's Slovenian team of translators.
3835 * The public headers no longer use __unused nor __block. This change is to
3836 support compiling programs that are derived from BSD sources and use
3837 __unused internally, and to support compiling with Clang's -fblock
3838 extension which uses __block.
3840 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3841 large collation sequences to optimize multiple passes. This cache
3842 computation may overflow for large collation sequences and may cause a
3843 stack or buffer overflow. This is now fixed to use a slower algorithm
3844 which does not use a cache if there is an integer overflow.
3846 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3847 rules for large collation sequences to optimize multiple passes and falls
3848 back to alloca if malloc fails, resulting in a possible stack overflow.
3849 The implementation now falls back to an uncached collation sequence lookup
3852 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3853 initialized for static applications resulting in the security feature
3854 being disabled. The pointer guard is now correctly initialized to a
3855 random value for static applications. Existing static applications need
3856 to be recompiled to take advantage of the fix (bug 15754).
3858 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3859 to the d_name member of struct dirent, or omit the terminating NUL
3860 character. (Bugzilla #14699).
3862 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3863 aligned_alloc functions could allocate too few bytes or corrupt the
3864 heap when passed very large allocation size values (Bugzilla #15855,
3867 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3868 for AF_INET6 has been fixed (Bugzilla #16072).
3870 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3871 pap_CW, quz_PE, the_NP.
3873 * Substantially revised locales: gd_GB, ht_HT
3875 * The LC_ADDRESS field was updated to support country_car for almost all
3878 * ISO 1427 definitions were updated.
3880 * ISO 3166 definitions were updated.
3882 * The localedef utility now supports --big-endian and --little-endian
3883 command-line options to generate locales for a different system from that
3884 for which the C library was built.
3886 * Binary locale files now only depend on the endianness of the system for
3887 which they are generated and not on other properties of that system. As a
3888 consequence, binary files generated with new localedef may be incompatible
3889 with old versions of the GNU C Library, and binary files generated with
3890 old localedef may be incompatible with this version of the GNU C Library,
3891 in the following circumstances:
3893 + Locale files may be incompatible on m68k systems.
3895 + Locale archive files (but not separate files for individual locales) may
3896 be incompatible on systems where plain "char" is signed.
3898 * The configure option --disable-versioning has been removed. Builds with
3899 --disable-versioning had not worked for several years.
3901 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3902 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3904 * SystemTap probes for malloc have been introduced.
3906 * SystemTap probes for slow multiple precision fallback paths of
3907 transcendental functions have been introduced.
3909 * Support for powerpc64le has been added.
3911 * The soft-float powerpc port now supports e500 processors.
3913 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3915 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3916 set of header declarations that are enabled by default, even when other
3917 feature test macros or compiler options such as -std=c99 would otherwise
3918 disable some of those declarations.
3920 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3921 conflict with POSIX. The libbsd-compat library (which was a dummy library
3922 that did nothing) has also been removed.
3924 * Preliminary documentation about Multi-Thread, Async-Signal and
3925 Async-Cancel Safety has been added.
3927 * Change of ABI data structures for s390 and s390x:
3928 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3929 allow for future hardware extensions. All library functions that accept or
3930 return these structures were versioned in order to provide backwards
3931 compatibility with existing code. However, not all cases can be handled
3932 with interface versioning. If an application embeds either structure into
3933 another structure and that structure is passed to another compilation unit
3934 which expects the newer larger-sized object then any access to the new
3935 fields will result in undefined behaviour. Similarly any access to fields
3936 that were moved by the enlarging of the structures will cause undefined
3937 behaviour. To fix the undefined behaviour all objects that are part of the
3938 final in-memory image must agree on the size of structures, and this may
3939 require recompilation.
3943 * The following bugs are resolved with this release:
3945 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3946 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3947 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3948 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3949 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3950 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3951 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3952 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3953 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3954 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3955 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3956 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3957 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3960 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3961 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3962 Distributions can re-enable building and using pt_chown via the new configure
3963 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3964 considerable security risks and should only be used if the distribution
3965 understands and accepts the risks.
3967 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3970 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3971 fixed (Bugzilla #15330).
3973 * Add support for calling C++11 thread_local object destructors on thread
3974 and program exit. This needs compiler support for offloading C++11
3975 destructor calls to glibc.
3977 * Improved worst case performance of libm functions with double inputs and
3980 * Support for priority inherited mutexes in pthread condition variables on
3981 non-x86 architectures.
3983 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3985 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3987 * Optimized string functions for ARM. Implemented by Will Newton and
3990 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3992 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3995 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3996 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3998 * Added a benchmark framework to track performance of functions in glibc.
4000 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
4001 It is based on draft TS 18661 and currently enabled as a GNU extension.
4003 * On Linux, the clock function now uses the clock_gettime system call
4004 for improved precision, rather than old times system call.
4006 * Added support for version-3 tz format files. This is needed when using
4007 the tz database release 2013e or later, and affects a few unusual cases --
4008 currently only TZ='America/Godthab' for time stamps after 2037.
4010 * Added new API functions pthread_getattr_default_np and
4011 pthread_setattr_default_np to get and set the default pthread
4012 attributes of a process.
4014 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
4015 This may improve lock scaling of existing programs on TSX capable systems.
4016 When the --enable-lock-elision=yes parameter is specified at configure
4017 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
4020 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
4021 availability). Implemented by Ryan S. Arnold.
4023 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
4027 * The following bugs are resolved with this release:
4029 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
4030 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
4031 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
4032 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
4033 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
4034 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
4035 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
4036 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
4037 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
4038 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
4039 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
4040 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
4041 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
4042 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
4043 14879, 14889, 14893, 14898, 14914.
4045 * Optimization of memcpy for MIPS.
4047 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
4048 EMFILE has been fixed (Bugzilla #14889).
4050 * The add-on ports collection is now distributed in the "ports" subdirectory
4051 of the main GNU C Library distribution, rather than separately.
4053 * Port to ARM AArch64 contributed by Linaro.
4055 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
4056 Optimized versions of memcpy, memset, and memcmp added for System z10 and
4058 Implemented by Andreas Krebbel.
4060 * The new function secure_getenv allows secure access to the environment,
4061 returning NULL if running in a SUID/SGID process. This function replaces
4062 the internal function __secure_getenv.
4064 * SystemTap static probes have been added into the dynamic linker.
4065 Implemented by Gary Benson.
4067 * Optimizations of string functions strstr, strcasestr and memmem.
4068 Implemented by Maxim Kuvyrkov.
4070 * The minimum Linux kernel version that this version of the GNU C Library
4071 can be used with is 2.6.16.
4073 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
4074 powerpc POWER7. Implemented by Will Schmidt.
4076 * New configure option --disable-nscd builds the C library such that it
4077 never attempts to contact the Name Service Caching Daemon (nscd).
4078 New configure option --disable-build-nscd avoids building nscd itself;
4079 this is the default if --disable-nscd is used.
4081 * Improved support for cross-compilation, including cross-testing and
4082 bootstrap builds without a previously built glibc.
4084 * Several testsuite tests are now able to test multiple IFUNC variants of an
4085 interface, rather than just testing the one that would be chooen by
4088 * New configure options --with-bugurl and --with-pkgversion, for
4089 distributors to use to embed their bug-reporting and package version
4090 information in --help and --version output.
4092 * The ttyname and ttyname_r functions on Linux now fall back to searching for
4093 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
4094 allows creation of chroots without the procfs mounted on /proc.
4096 * The `crypt' function now fails if passed salt bytes that violate the
4097 specification for those values. On Linux, the `crypt' function will
4098 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
4099 enabled, and fail on encrypted strings using the MD5 or DES algorithm
4100 when the mode is enabled.
4102 * The `clock_*' suite of functions (declared in <time.h>) is now available
4103 directly in the main C library. Previously it was necessary to link with
4104 -lrt to use these functions. This change has the effect that a
4105 single-threaded program that uses a function such as `clock_gettime' (and
4106 is not linked with -lrt) will no longer implicitly load the pthreads
4107 library at runtime and so will not suffer the overheads associated with
4108 multi-thread support in other code such as the C++ runtime library.
4110 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
4115 * The following bugs are resolved with this release:
4117 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
4118 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
4119 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
4120 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
4121 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
4122 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
4123 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
4124 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
4125 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
4126 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
4127 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
4128 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
4129 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
4130 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
4131 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
4132 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
4133 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
4134 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
4135 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
4136 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
4137 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
4138 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
4141 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
4142 configuring glibc with:
4143 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
4144 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
4145 Implemented by H.J. Lu.
4149 + define static_assert
4151 + do not declare gets
4153 + declare at_quick_exit and quick_exit also for ISO C11
4155 + aligned_alloc. NB: The code is deliberately allows the size parameter
4156 to not be a multiple of the alignment. This is a moronic requirement
4157 in the standard but it is only a requirement on the caller, not the
4160 + timespec_get added
4162 + uchar.h support added
4164 + CMPLX, CMPLXF, CMPLXL added
4166 Implemented by Ulrich Drepper.
4168 * Support for the IA-64 has been moved to ports.
4170 * Remove support for anything but ELF binary format
4172 * Checking versions of poll, ppoll added.
4173 Implemented by Ulrich Drepper.
4175 * More generic and 64-bit performance optimizations to math functions.
4176 Implemented by Ulrich Drepper.
4178 * New configure option --enable-obsolete-rpc makes the deprecated RPC
4179 headers and functions available at compile time as they were before
4180 version 2.14. This option will be removed at some time in the future
4181 after the TI-RPC library becomes fully sufficient for the needs of
4182 existing applications.
4184 * Compatibility code for Linux kernel versions before 2.4 has been removed.
4185 Note that glibc is not expected to work with any Linux kernel version
4188 * New header <sys/auxv.h> and function getauxval allowing easy access to
4189 the AT_* key-value pairs passed from the Linux kernel. The header also
4190 defines the HWCAP_* bits associated with the AT_HWCAP key.
4192 * New locales: mag_IN
4194 * New configure option --enable-systemtap builds SystemTap static probes
4195 into libc for setjmp and longjmp and into libpthread for various operations.
4196 So far the setjmp/longjmp probes and some of the libpthread probes are
4197 provided only for i*86 and x86_64.
4198 Implemented by Roland McGrath and Rayson Ho.
4200 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
4202 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
4205 * More optimized functions for SPARC. Implemented by David S. Miller.
4207 * Improved support for cross-compilation, especially bootstrap builds
4208 without a previously built glibc.
4210 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
4211 Chris Metcalf from Tilera.
4213 * Support for the old ARM ABI has been removed from ports. Only the EABI is
4214 now supported for ARM processors.
4216 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
4217 as the name of the dynamic linker, to distinguish it from the
4218 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
4220 * Support for CRIS has been removed from ports.
4222 * A new class of installed header has been documented for low-level
4223 platform-specific functionality. PowerPC added the first instance with a
4224 function to provide time base register access. Contributed by Tulio
4225 Magno Quites Machado Filho.
4227 * ix86 configurations now install header files that are consistent with
4228 what x86-64 configurations install. These same header files can be used
4229 for -m32, -m64, or -mx32 builds.
4230 Contributed by H.J. Lu.
4232 * Math library bug fixes. A thorough audit of all open math library bugs was
4233 conducted by Joseph Myers. Significant progress was made on many math
4234 library bugs resulting in more accurate exceptions and function results.
4235 Many thanks to all those that contributed including Andreas Jaeger for his
4236 patch review and work on the x87 trigonometric instruction issues.
4238 * Timezone data is no longer installed. Timezone-related binaries and scripts
4239 will continue to be installed. Users should obtain their timezone data from
4240 their distribution provider or from the tzdata package at
4241 <ftp://munnari.oz.au/pub/>.
4245 * The following bugs are resolved with this release:
4247 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
4248 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
4249 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
4250 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
4251 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
4252 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
4253 13484, 13506, 13515, 13523, 13524, 13538, 13540
4255 * New program pldd to list loaded object of a process
4256 Implemented by Ulrich Drepper.
4258 * Add nss_db support back to glibc. No more dependency on Berkeley db
4259 and support for initgroups lookups.
4260 Implemented by Ulrich Drepper.
4262 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4263 Contributed by HJ Lu.
4265 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4266 Contributed by HJ Lu.
4268 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4269 on x86-32 and x86-64.
4270 Contributed by Liubov Dmitrieva.
4272 * Optimized strchr and strrchr for SSE on x86-32.
4273 Contributed by Liubov Dmitrieva.
4275 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4276 for x86-64 and x86-32.
4277 Contributed by Liubov Dmitrieva.
4279 * New interfaces: scandirat, scandirat64
4280 Implemented by Ulrich Drepper.
4282 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4283 Implemented by Ulrich Drepper.
4285 * nscd now also caches the netgroup database.
4286 Implemented by Ulrich Drepper.
4288 * Integrate libm with gcc's -ffinite-math-only option.
4289 Implemented by Ulrich Drepper.
4291 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4292 to math functions. Implemented by Ulrich Drepper.
4294 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4295 Implemented by Ulrich Drepper.
4297 * New Linux interfaces: process_vm_readv, process_vm_writev
4299 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4300 Implemented by Ulrich Drepper.
4302 * Optimized nearbyint and strcasecmp for PPC.
4303 Implemented by Adhemerval Zanella.
4305 * New locales: bho_IN, unm_US, es_CU, ta_LK
4309 * The following bugs are resolved with this release:
4311 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4312 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4313 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4314 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4315 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4316 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4317 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4318 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4319 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4320 12795, 12811, 12813, 12814, 12841
4322 * The RPC implementation in libc is obsoleted. Old programs keep working
4323 but new programs cannot be linked with the routines in libc anymore.
4324 Programs in need of RPC functionality must be linked against TI-RPC.
4325 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4327 Visible changes of this change include (obviously) the inability to link
4328 programs using RPC functions without referencing the TI-RPC library and the
4329 removal of the RPC headers from the glibc headers.
4330 Implemented by Ulrich Drepper.
4332 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4333 syncfs, setns, sendmmsg
4335 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4336 yue_HK, lij_IT, mhr_RU
4338 * New encodings: CP770, CP771, CP772, CP773, CP774
4340 * New program sotruss to trace calls through PLTs
4341 Implemented by Ulrich Drepper.
4343 * The malloc hook implementation is marked deprecated and will be removed
4344 from the default implementation in the next version. The design never
4345 worked ever since the introduction of threads. Even programs which do
4346 not create threads themselves can use multiple threads created internally.
4350 * The following bugs are resolved with this release:
4352 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4353 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4354 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4355 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4358 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4360 * POWER7 optimizations: memset, memcmp, strncmp
4362 * New optimized string functions for x86-64: strnlen (SSE2),
4363 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4364 Implemented by Ulrich Drepper.
4368 * The following bugs are resolved with this release:
4370 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4371 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4372 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4373 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4374 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4375 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4376 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4377 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4379 * New interfaces: pthread_getname_np, pthread_setname_np
4381 * New Linux interface: recvmmsg
4383 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4385 * The dynamic linker now recognizes supported ABI versions from the
4386 EI_ABIVERSION field in the ELF header.
4387 Implemented by Ulrich Drepper.
4389 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4390 will not be used to fill in password fields in the passwd.byname replies.
4391 Instead it is used to synthesize the shadow.byname table, should it be
4392 missing. This is a useful mode in some installations involving Solaris.
4393 Implemented by Ulrich Drepper.
4395 * New locales: kok_IN, sq_MK, cv_RU
4399 * The following bugs are resolved with this release:
4401 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4402 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4403 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4404 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4405 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4406 10789, 10817, 10823, 10840, 10847
4408 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4410 Implemented by Ulrich Drepper.
4412 * Checking version of longjmp added that fails if an uninitialized stack
4413 frame would be created. Implemented by Ulrich Drepper.
4415 * STT_GNU_IFUNC is now supported in static executables.
4416 Implemented by H.J. Lu.
4418 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4420 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4421 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4422 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4423 Contributed by H.J. Lu.
4425 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4426 Implemented by Ulrich Drepper.
4428 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4430 Contributed by H.J. Lu.
4432 * Support for fma instruction in AVX on x86-64.
4433 Implemented by H.J. Lu and Ulrich Drepper.
4435 * AVX support in x86-64 auditing support in ld.so.
4436 Implemented by H.J. Lu.
4438 * STB_GNU_UNIQUE support added.
4439 Implemented by Ulrich Drepper.
4441 * Implement second fallback mode for optimized DNS lookup for even more
4442 broken environments. If two requests from the same port are not
4443 handled correctly close the socket and open a new one before sending
4444 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4445 can be used to select this mode right away, instead of rediscovering the
4446 necessity is every process again.
4447 Implemented by Ulrich Drepper.
4449 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4450 Implemented by Adam Tkac.
4452 * Optimized iconv conversions for S390x.
4453 Implemented by Andreas Krebbel.
4455 * Using condvars with PI mutexes is now more efficient due to kernel
4456 support for requeueing to PI futexes. NPTL support added for x86-64.
4457 Implemented by Ulrich Drepper.
4459 * New locales: ps_AF, my_MM
4463 * The following bugs are resolved with this release:
4465 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4466 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4467 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4468 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4469 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4471 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4472 Implemented by Ulrich Drepper.
4474 * New Linux interfaces: accept4, fallocate, fallocate64.
4475 Implemented by Ulrich Drepper.
4477 * Correct declarations of string function when used in C++ code. This
4478 could lead to compile errors for invalid C++ code.
4480 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4483 * New POSIX 2008 interface: psiginfo
4484 Implemented by Ulrich Drepper.
4486 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4487 Implemented by Ulrich Drepper.
4489 * Support for selecting between multiple function definitions at runtime
4490 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4492 * The libcrypt library can now use the hash function implementations in
4493 NSS. Implemented by Ulrich Drepper.
4495 * The malloc implementation can be compiled to be less memory efficient
4496 but higher performing in multi-threaded programs.
4497 Implemented by Ulrich Drepper.
4499 * New locales: nan_TW@latin, ks_IN
4501 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4502 Implemented by Ulrich Drepper.
4504 * Extended printf hook support. It is possible to use user-defined types
4505 and extend existing format specifiers.
4506 Implemented by Ulrich Drepper.
4508 * Handling for group shadow files has been added.
4509 Implemented by Ulrich Drepper.
4511 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4512 servers (the case, e.g., for some people using the built-in DNS
4513 server in ADSL modems/routers). There is a once-per-process timeout
4514 in case of a broken server. To avoid it, users can run nscd or put
4515 'options single-request' in /etc/resolv.conf.
4516 Implemented by Ulrich Drepper.
4520 * The following bugs are resolved with this release:
4522 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4523 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4524 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4525 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4526 6968, 6974, 6980, 6995, 7008, 7009, 7029
4528 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4529 up at the same time. Implemented by Ulrich Drepper.
4531 * TLS descriptors for LD and GD on x86 and x86-64.
4532 Implemented by Alexandre Oliva.
4534 * getaddrinfo now handles DCCP and UDPlite.
4535 Implemented by Ulrich Drepper.
4537 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4538 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4539 Implemented by Ulrich Drepper.
4541 * New implementation of memmem, strstr, and strcasestr which is O(n).
4542 Implemented by Eric Blake.
4544 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4546 * Implement "e" option for popen to open file descriptor with the
4547 close-on-exec flag set. Implemented by Ulrich Drepper.
4549 * Implement "b" mode for fmemopen. In this mode writes writes don't
4550 implicitly add a NUL byte and seeks from the end of the buffer really
4551 use the buffer end, not the string length as the basis.
4552 Implemented by Ulrich Drepper.
4554 * Many functions, exported and internal, now atomically set the close-on-exec
4555 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4557 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4559 Implemented by Pravin Satpute.
4561 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4565 * The following bugs are resolved with this release:
4567 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4568 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4569 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4570 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4571 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4572 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4573 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4575 * New locales: bo_CN, bo_IN, shs_CA.
4577 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4579 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4580 Implemented by Pravin Satpute.
4582 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4584 * nscd caches now all timeouts for DNS entries
4585 Implemented by Ulrich Drepper.
4587 * nscd is more efficient and wakes up less often.
4588 Implemented by Ulrich Drepper.
4590 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4591 vdprintf, and obstack_vprintf.
4592 Implemented by Jakub Jelinek.
4594 * Faster memset for x86-64.
4595 Implemented by Harsha Jagasia and H.J. Lu.
4597 * Faster memcpy on x86.
4598 Implemented by Ulrich Drepper.
4600 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4601 Implemented by Ulrich Drepper.
4603 * Faster sqrt and sqrtf implemention for some PPC variants.
4604 Implemented by Steven Munroe.
4608 * The following bugs are resolved with this release:
4610 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4611 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4612 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4613 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4614 5071, 5103, 5104, 5112, 5113, 5184, 5186
4616 * More checking functions: fread, fread_unlocked, open*, mq_open.
4617 Implemented by Jakub Jelinek and Ulrich Drepper.
4619 * Extend fortification to C++. Implemented by Jakub Jelinek.
4621 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4622 by not recognizing 'a' as a modifier when those specs are requested.
4623 Implemented by Jakub Jelinek.
4625 * PPC optimizations to math and string functions.
4626 Implemented by Steven Munroe.
4628 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4629 options to be passed. Implemented by Ulrich Drepper.
4631 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4633 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4634 Implemented by Ulrich Drepper.
4636 * Handle private futexes in the NPTL implementation.
4637 Implemented by Jakub Jelinek and Ulrich Drepper.
4639 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4640 Implemented by Roland McGrath and Ulrich Drepper.
4642 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4644 * SHA-256 and SHA-512 based password encryption.
4645 Implemented by Ulrich Drepper.
4647 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4648 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4651 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4652 Implemented by Ulrich Drepper.
4656 * The following bugs are resolved with this release:
4658 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4659 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4660 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4661 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4662 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4663 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4664 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4667 * New Linux interfaces: epoll_pwait, sched_getcpu.
4669 * New generic interfaces: strerror_l.
4671 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4675 * The following bugs are resolved with this release:
4677 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4678 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4679 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4680 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4681 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4682 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4683 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4684 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4685 3225, 3251, 3252, 3253, 3273
4687 * For Linux, the sorting of addresses returned by getaddrinfo now also
4688 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4689 Implemented by Ulrich Drepper.
4691 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4692 Implemented by Ulrich Drepper.
4694 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4696 * New iconv module for MIK. Contributed by Alexander Shopov.
4698 * For sites with broken group and/or passwd database, the auto-propagate
4699 option of nscd can prevent creating ID lookup entries from the results
4700 of a name lookup and vice versa. This usually is no problem but some
4701 site might have problems with the default behavior.
4702 Implemented by Ulrich Drepper.
4704 * Iterating over entire database in NIS can be slow. With the
4705 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4706 to trade time for memory. The entire database will be read at once.
4707 Implemented by Ulrich Drepper.
4709 * The interfaces introduced in RFC 3542 have been implemented by
4712 * Support for the new ELF hash table format was added by Ulrich Drepper.
4714 * Support for priority inheritance mutexes added by Jakub Jelinek and
4717 * Support for priority protected mutexes added by Jakub Jelinek.
4719 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4720 or_IN, csb_PL, fy_NL, sr_ME.
4724 * More overflow detection functions.
4726 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4727 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4729 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4730 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4731 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4732 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4733 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4734 by Masahide Washizawa.
4736 * It is now possible to install audit libraries for the dynamic linker using
4737 LD_AUDIT. Implemented by Ulrich Drepper.
4739 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4740 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4741 For a libc and libpthread that works well on Linux 2.4 kernels, we
4742 recommend using the stable 2.3 branch.
4744 * The new function open_wmemstream acts like open_memstream,
4745 but uses a wchar_t wide character buffer.
4747 * The new function ppoll is an improved version of poll, similar to pselect.
4749 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4750 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4751 renameat, unlinkat, linkat, symlinkat, readlinkat.
4753 * New Linux kernel system calls: unshare,
4754 inotify_init, inotify_add_watch, inotify_rm_watch.
4756 * The euidaccess function is now also known by the alias eaccess,
4757 for compatibility with some other systems.
4759 * Timezone data updated to 2006b version.
4763 * The following bugs are resolved with this release:
4765 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4766 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4767 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4768 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4769 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4770 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4772 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4774 * As of this release, GCC 4 can be used to compile the C Library.
4776 * Timezone data updated to 2005m version.
4780 * The following bugs are resolved with this release:
4782 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4783 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4784 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4785 777, 787, 821, 822, 823, 825
4787 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4791 * Support for RFC 3678. Real implementations exist only for Linux so far.
4792 Implemented by Ulrich Drepper.
4794 * nscd can now cache entries persistently. Expiring entries are reloaded.
4795 For speedups the cache can be shared in memory with client processes.
4796 Implemented by Ulrich Drepper.
4798 * nscd can now perform SELinux checks.
4799 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4801 * getaddrinfo queries are now cached. Canonical name lookup is performed
4803 Implemented by Ulrich Drepper.
4805 * The nothrow function attribute is used when headers are used by gcc when
4806 compiling C code. This can avoid significant amounts of exception
4809 * The malloc functions perform more error checking and are stricter when
4810 it comes to reacting on errors. The default action is to terminate
4811 the process after showing an error message. Implemented by Ulrich Drepper.
4813 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4814 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4816 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4817 namespaces using the new function dlmopen(). This feature is of course,
4818 like most other dynamic loading functionality, not available in statically
4819 linked applications. Implemented by Ulrich Drepper.
4821 * Low-overhead boundary checking variants of string and some stdio functions
4822 were added. These are to be used in conjunction with a gcc patch by
4823 Jakub Jelinek which adds calls to these functions if possible.
4824 Implemented by Jakub Jelinek and Ulrich Drepper.
4826 * Old code for several operating systems and machine architectures that
4827 have not been in working condition in a long time have been removed from
4828 the main source tree maintained by the GNU C Library's maintainers.
4829 These files are now reside in the separate `ports' source module
4830 that is usable as an add-on when building the library.
4834 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4835 interrogate the dynamic linker, compatible with the Solaris interface.
4837 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4838 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4840 * getifaddrs now uses the netlink interface on Linux to get its information.
4841 Implemented by Thorsten Kukuk.
4843 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4844 Implemented by Ulrich Drepper.
4846 * support for non-executable stacks on x86 has been added. Changes mostly
4849 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4852 * getaddrinfo now performs destination address selection according to
4857 * Thread-safe interfaces for many functions that access locale data
4858 were added in version 2.3, but these features were omitted from NEWS.
4859 Many functions have variants with an `_l' suffix that take a `locale_t'
4860 object as a parameter rather than consulting the current locale.
4861 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4862 create and maintain `locale_t' objects. Additionally, the new function
4863 `uselocale' sets "the current locale" (as used by functions not so
4864 parameterized) set for an individual thread. These features were added
4865 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4867 * The functions getresuid, getresgid, setresuid, and setresgid, which
4868 have long been available on Linux, are now declared in <unistd.h>
4869 and are now also available on the Hurd.
4871 * ELF thread-local storage support (TLS) now works on x86-64.
4873 * The new dynamic string token $LIB is expanded in shared library names.
4874 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4876 * Aldy Hernandez contributed complete software floating point support for
4877 PowerPC machines with no FPU.
4879 * fexecve is implemented on Linux.
4881 * The `btowc' function should work at least twice as fast due to
4882 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4884 * With approriate thread add-ons cancelable functions are now implemented
4885 in libc.so as well. No need to call the function in libpthread. This
4886 change allowed to finally disable the incorrect and expensive handling
4887 of weak definition in ld.so.
4889 * Yet more PLT entries in libc.so have been removed. We finally arrived
4890 at the bare minimum. Startup times improved appropriately.
4892 * Support for the new Linux/x86 system call interface was added. The
4893 AT_SYSINFO auxiliary vector entry is recognized and handled.
4897 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4900 * iconv (the program and the interface) now accepts empty names (excluding
4901 options like //TRANSLIT) to mean "use charset of current locale".
4903 * localedef can now transliterate characters in strings which are not in
4904 the provided charmap. The information from the input locale is used.
4906 * Prelinking support was added for ELF targets. This requires additional
4907 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4909 * Read-only stdio streams now use mmap to speed up operation by eliminating
4910 copying and buffer underflows. To use add 'm' to the mode string of
4911 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4913 * The malloc functions were completely rewritten by Wolfram Gloger based
4914 on Doug Lea's malloc-2.7.0.c.
4916 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4917 implementation of regex.
4919 * Bruno Haible upgraded the iconv and locale implementation to support
4922 * Contents of the LC_* and LANG environment variables in the CEN style are
4923 not recognized anymore. It never was used. Change by Ulrich Drepper.
4925 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4926 thread-local storage (TLS) ABI on some platforms.
4927 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4929 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4930 EUC-JISX0213, and TSCII.
4932 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4933 BSD-compatible interface for getting all network interface addresses.
4934 Implementation for IPv4 by Roland McGrath.
4936 * Loading of locale data is faster due to the introduction of a locale
4937 archive. Implemented by Roland McGrath and Ulrich Drepper.
4939 * Startup times are significantly reduced by not using exported functions
4940 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4943 * Steven Munroe contributed a port to PowerPC64/Linux.
4947 * The Hurd now uses the GNU libio implementation of stdio rather than the
4948 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4950 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4951 with the same behavior as the Linux system call of the same name.
4955 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4956 128-bit long double format.
4958 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4959 IBM1161, and IBM1162 charsets.
4961 * Andreas Jaeger contributed a port to x86-64/Linux.
4963 * Peter Bruin contributed a port to PowerPC/Hurd.
4965 * libc functions using I/O streams now can handle wide-oriented streams
4968 * optimizations in the dynamic linker. Binaries created by recent binutils
4969 versions start up quicker due to reduced time spent on relocations.
4971 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4975 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4976 asinh, atanh, j0 for the 128-bit long double format.
4978 * Bruno Haible updated all the code handling Unicode in some form to
4979 support Unicode 3.1.
4981 * Speed of regex for single-byte locales is back to previous levels.
4982 Patch by Isamu Hasegawa.
4984 * Alpha, SPARC, and IA-64 now also using floating stacks.
4986 * Startup time of internationalized applications greatly improved through
4987 iconv cache. Use iconvconfig to generate the cache file.
4988 Contributed by Ulrich Drepper.
4990 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4991 severe performance problems. Patch by David Mosberger.
4993 * The Hurd port got a lot more functionality like AIO, various stdio
4994 extensions, etc. Mainly done by Roland McGrath.
4996 * mtrace can now lookup symbols in shared libraries.
5000 * Intel's IA-64 math library is largely integrated. It provides fast and
5001 accurate implementatations for most basic and standard math functions
5002 in float, double, and long double format.
5004 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
5005 and asin for the 96-bit long double format and asin, log, tan for the
5006 128-bit long double format.
5008 * The beginning of a last-bit accurate math library by IBM Haifa were added.
5009 The basic double functions exist today. Contributed by Abraham Ziv
5010 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
5011 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
5013 * An asynchronous name lookup library was added. The interface is designed
5014 after POSIX AIO. The proposal was circulated beforehand to get comments.
5015 No negative ones came in. Implemented by Ulrich Drepper.
5017 * Port to S390/64bit contributed by Martin Schwidefsky
5018 <schwidefsky@de.ibm.com>.
5020 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
5021 of functions for Linux/IA-64.
5023 * The RPC code is now thread safe. Threads can now use the same service
5024 of different services at the same time. Patch by Eric Norum
5025 <eric.norum@usask.ca> with some help by Ulrich Drepper.
5027 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
5028 family of functions for Linux/S390.
5030 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
5031 of functions for Linux/x86.
5033 * Port to Linux/CRIS contributed by Axis Communications.
5037 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
5038 we can now check for namespace violations and missing declarations. The
5039 result is that almost all headers are now Unix-compliant (as defined in
5040 the upcoming XPG6). The negative side is that some programs might need
5041 corrections, too, if they depend on the incorrect form of the headers in
5042 previous versions which defined too many symbols and included too many
5045 * regex now handles multibyte character sets correctly.
5046 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
5048 * iconv (the program) does now conform to the upcoming XPG6 and handles
5049 charmaps. Instead of the charset names the path of charmaps can be
5050 provided and the conversion happens based on this data.
5051 Contributed by Ulrich Drepper.
5053 * The locale program now provides detailed information about the installed
5058 only lists the names of the supported locales
5062 provides details such as country, language, and codeset name.
5063 Contributed by Ulrich Drepper.
5067 * The gencat program now parses the input file according to the charset
5068 selected by the LC_CTYPE category. This is important for stateful
5069 character sets. To make generating catalogs easier there is a way
5070 to overwrite the charset selected by the locale: before the first
5071 message or $ quote line the catalog can contain a line like
5073 $ codeset=ISO-8859-2
5075 to select the charset (ISO-8859-2 in this case).
5077 Implemented by Shinya Hanataka and Ulrich Drepper.
5079 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
5080 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
5081 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
5083 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
5084 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
5086 * The LANGUAGE environment variable is now ignored unless the locale is
5087 changed from the default "C" locale.
5089 * The usual bug fixes.
5093 * Greg McGary added runtime support for bounds checking using gcc's
5094 new -fbounded-pointers option. ix86 target is complete. PowerPC
5097 * Thorsten Kukuk added secure mode support to nscd.
5099 * The Berkeley db libraries have been removed.
5101 Related, the nss_db module is now in a separate package since it
5102 obviously requires a database library being available.
5104 * Wide character I/O streams implemented by Ulrich Drepper.
5106 * Functions from the extended socket API added by Ulrich Drepper.
5108 * Functions feenableexcept and fedisableexcept to control the
5109 behaviour of individual exceptions have been added by Andreas Jaeger.
5111 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
5113 * The resolver code has been updated from bind 8.2.3-T5B which supports
5114 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
5117 This change could in some situations effect backward compatibility. Since
5118 now `_res' is a thread-local instead of a global variable, modifying it
5119 in one thread does not have any effect in other threads.
5121 The resolver library was also extended to allow IPv6 as the transport
5122 protocol for the requests. This work was done by Stig Venaas.
5124 * Compatibility code for K&R C compilers has been removed from the
5125 header files. A ISO C compiler is needed to use the library
5126 (conforming to either C89 or C99 standard).
5128 * Complete rewrite of the localedef program to support multibyte character
5129 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
5130 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
5131 Implemented by Ulrich Drepper.
5133 Bruno Haible significantly improved the generation and use of the data
5134 structures for the wide character tables.
5136 * Plural handling in gettext implemented by Ulrich Drepper.
5138 * The utmp daemon has been removed.
5140 * The port to MIPS-Linux has been finished by Andreas Jaeger.
5142 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
5145 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
5147 * POSIX barriers implemented by Kaz Kylheku.
5149 * POSIX spawn function family implemented by Ulrich Drepper.
5151 * POSIX spinlocks are now available.
5153 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
5155 * the configure option --enable-kernel=X.Y.Z allows to strip out
5156 compatibility for kernel versions before X.Y.Z. This is currently only
5157 implemented for Linux.
5159 * the sockaddr_in6 structure changed. The IPv6 working group added a new
5160 field sin6_scope_id. This means that all programs using IPv6 should be
5161 recompiled. Don't expect binary compatibility with previous glibc
5164 * various conversion modules for IBM character sets contributed by
5167 * IA-64 port by Jes Sorensen and HJ Lu.
5181 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
5183 * New xdr functions are added; some rpc functions are now 64bit clean.
5185 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
5187 * Fixed known incompatibilities with glibc 2.0.
5189 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
5191 * Optimized a number of functions (especially the ELF dynamic loader).
5193 * Update timezone data files.
5195 * lots of charmaps corrections
5197 * some new locale definitions and charmaps
5202 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
5203 conform to POSIX member type requirements. Symbol versions have been
5204 adjusted as needed within the library, and for direct use by applications,
5205 but there is potential for problems if third-party libraries use
5206 struct timeval as part of their interface. This does not present
5207 a problem for X and other "essential" system libraries.
5209 * An additional locale model to support C++ Standard Library locale
5210 model and probably more was implemented by Ulrich Drepper.
5212 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
5215 * Miles Bader provided the `argp' function family to support hierachical
5216 command line argument parsing, layered on top of getopt.
5218 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
5220 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
5223 * scanf recognizes the %a and %A format for scanning floating point numbers.
5225 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
5226 information and interfaces for the available integer types.
5228 * about 130 new math functions were added to implement the ISO C9x math
5231 * the new header <complex.h> contains definitions of the complex math
5232 functions from ISO C 9X.
5234 * the new header <tgmath.h> defines generic macros to use complex or
5235 real valued functions.
5237 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
5239 * Andreas Jaeger provided a test suite for the math library.
5241 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
5243 * Ulrich Drepper added character set conversion functions (iconv).
5245 * Optimized string functions have been added.
5247 * The localedata addon is now part of glibc.
5249 * An implementation of profiling shared libraries was added by Ulrich Drepper.
5251 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
5252 daemon for NSS (nscd).
5254 Missing a better place here are some numbers on improvements. Under
5255 Linux 2.1.125 un-tar-ing the kernel sources takes
5259 using local files 12.19s 6.88s 22.91s
5261 using NIS 13.92s 8.91s 26.34s
5263 using NIS & nscd 10.37s 7.34s 25.30s
5265 using NIS+ 27.57s 30.37s 640.46s
5267 using NIS+ & nscd 10.25s 7.83s 26.51s
5269 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5271 Keep in mind that non-namelookup related operations dominate above times.
5272 It was just a common complain that using NIS+ unpacking the kernel is
5275 [1] The old nscd implementation is not available anymore since it was
5276 distributed with glibc up to version 2.0.98 and thus is now replaced.
5278 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5280 * Mark Kettenis provided a Hesiod NSS module.
5282 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5283 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5285 * rcmd can now handle netgroups (Dick Streefland).
5287 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5290 * Support for the IPv6 protocol has been added to the socket API, as per the
5291 latest draft standards.
5293 * Support for Linux 2.2 has been added.
5295 * Interface changes relative to the latest 2.0.x release:
5296 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5297 addseverity NEW: Unix98
5298 alphasort64 NEW: LFS
5299 argp_err_exit_status NEW: argp, GNU ext
5300 argp_error NEW: argp, GNU ext
5301 argp_failure NEW: argp, GNU ext
5302 argp_help NEW: argp, GNU ext
5303 argp_parse NEW: argp, GNU ext
5304 argp_program_bug_address NEW: argp, GNU ext
5305 argp_program_version NEW: argp, GNU ext
5306 argp_program_version_hook NEW: argp, GNU ext
5307 argp_state_help NEW: argp, GNU ext
5308 argp_usage NEW: argp, GNU ext
5309 authdes_create NEW: Secure RPC
5310 authdes_getucred NEW: Secure RPC
5311 authdes_pk_create NEW: Secure RPC
5312 backtrace NEW: GNU ext.
5313 backtrace_symbols NEW: GNU ext.
5314 backtrace_symbols_fd NEW: GNU ext.
5316 cacosf NEW: ISO C 9x
5317 cacosh NEW: ISO C 9x
5318 cacoshf NEW: ISO C 9x
5319 cacoshl NEW: ISO C 9x
5320 cacosl NEW: ISO C 9x
5327 casinf NEW: ISO C 9x
5328 casinh NEW: ISO C 9x
5329 casinhf NEW: ISO C 9x
5330 casinhl NEW: ISO C 9x
5331 casinl NEW: ISO C 9x
5333 catanf NEW: ISO C 9x
5334 catanh NEW: ISO C 9x
5335 catanhf NEW: ISO C 9x
5336 catanhl NEW: ISO C 9x
5337 catanl NEW: ISO C 9x
5338 cbc_crypt NEW: Secure RPC
5342 ccoshf NEW: ISO C 9x
5343 ccoshl NEW: ISO C 9x
5349 cimagf NEW: ISO C 9x
5350 cimagl NEW: ISO C 9x
5351 clearerr_locked REMOVED
5352 clntunix_create NEW: sunrpc ext
5354 clog10 NEW: ISO C 9x
5355 clog10f NEW: ISO C 9x
5356 clog10l NEW: ISO C 9x
5366 cprojf NEW: ISO C 9x
5367 cprojl NEW: ISO C 9x
5369 crealf NEW: ISO C 9x
5370 creall NEW: ISO C 9x
5375 csinhf NEW: ISO C 9x
5376 csinhl NEW: ISO C 9x
5379 csqrtf NEW: ISO C 9x
5380 csqrtl NEW: ISO C 9x
5384 ctanhf NEW: ISO C 9x
5385 ctanhl NEW: ISO C 9x
5387 des_setparity NEW: Secure RPC
5388 ecb_crypt NEW: Secure RPC
5389 endutxent NEW: Unix98
5391 exp10f NEW: ISO C 9x
5392 exp10l NEW: ISO C 9x
5396 fattach NEW: STREAMS
5397 fdetach NEW: STREAMS
5401 feclearexcept NEW: ISO C 9x
5402 fegetenv NEW: ISO C 9x
5403 fegetexceptflag NEW: ISO C 9x
5404 fegetround NEW: ISO C 9x
5405 feholdexcept NEW: ISO C 9x
5407 feraiseexcept NEW: ISO C 9x
5408 ferror_locked REMOVED
5409 fesetenv NEW: ISO C 9x
5410 fesetexceptflag NEW: ISO C 9x
5411 fesetround NEW: ISO C 9x
5412 fetestexcept NEW: ISO C 9x
5413 feupdateenv NEW: ISO C 9x
5414 fflush_locked REMOVED
5418 fgets_unlocked NEW: GNU ext.
5419 fileno_locked REMOVED
5431 fputc_locked REMOVED
5432 fputs_unlocked NEW: GNU ext.
5433 fread_unlocked NEW: GNU ext.
5438 fstatvfs NEW: Unix98
5442 ftruncate64 NEW: LFS
5444 fwrite_unlocked NEW: GNU ext.
5445 gai_strerror NEW: IPv6
5449 getchar_locked REMOVED
5451 getdate_err NEW: Unix98
5452 getdate_r NEW: GNU ext.
5454 getnameinfo NEW: IPv6
5455 getnetname NEW: Secure RPC
5456 getpmsg NEW: STREAMS
5457 getpt NEW: Unix98 PTY
5458 getrlimit64 NEW: LFS
5459 getutxent NEW: Unix98
5460 getutxid NEW: Unix98
5461 getutxline NEW: Unix98
5462 glob64 NEW: GNU ext.
5463 globfree64 NEW: GNU ext.
5464 gnu_get_libc_release NEW: GNU ext.
5465 gnu_get_libc_version NEW: GNU ext.
5466 grantpt NEW: Unix98 PTY
5467 host2netname NEW: Secure RPC
5469 iconv_close NEW: iconv
5470 iconv_open NEW: iconv
5471 if_freenameindex NEW: IPv6
5472 if_indextoname NEW: IPv6
5473 if_nameindex NEW: IPv6
5474 if_nametoindex NEW: IPv6
5475 in6addr_any NEW: IPv6
5476 in6addr_loopback NEW: IPv6
5477 inet6_isipv4mapped NEW: IPv6
5478 isastream NEW: STREAMS
5479 iswblank NEW: GNU ext.
5480 key_decryptsession NEW: Secure RPC
5481 key_decryptsession_pk NEW: Secure RPC
5482 key_encryptsession NEW: Secure RPC
5483 key_encryptsession_pk NEW: Secure RPC
5484 key_gendes NEW: Secure RPC
5485 key_get_conv NEW: Secure RPC
5486 key_secretkey_is_set NEW: Secure RPC
5487 key_setnet NEW: Secure RPC
5488 key_setsecret NEW: Secure RPC
5489 llrint NEW: ISO C 9x
5490 llrintf NEW: ISO C 9x
5491 llrintl NEW: ISO C 9x
5492 llround NEW: ISO C 9x
5493 llroundf NEW: ISO C 9x
5494 llroundl NEW: ISO C 9x
5499 lrintf NEW: ISO C 9x
5500 lrintl NEW: ISO C 9x
5501 lround NEW: ISO C 9x
5502 lroundf NEW: ISO C 9x
5503 lroundl NEW: ISO C 9x
5505 makecontext NEW: Unix98
5506 mempcpy NEW: GNU ext.
5509 modify_ldt NEW: kernel
5513 nearbyint NEW: ISO C 9x
5514 nearbyintf NEW: ISO C 9x
5515 nearbyintl NEW: ISO C 9x
5516 netname2host NEW: Secure RPC
5517 netname2user NEW: Secure RPC
5518 nexttoward NEW: ISO C 9x
5519 nexttowardf NEW: ISO C 9x
5520 nexttowardl NEW: ISO C 9x
5524 passwd2des NEW: Secure RPC
5526 pow10f NEW: GNU ext.
5527 pow10l NEW: GNU ext.
5530 printf_size NEW: GNU ext.
5531 printf_size_info NEW: GNU ext.
5532 profil_counter REMOVED
5533 pthread_mutexattr_getkind_np REPLACED
5534 pthread_mutexattr_setkind_np REPLACED
5535 ptsname NEW: Unix98 PTY
5536 ptsname_r NEW: Unix98 PTY
5538 putchar_locked REMOVED
5539 putgrent NEW: GNU ext.
5541 putpmsg NEW: STREAMS
5542 pututxline NEW: Unix98
5546 readdir64_r NEW: LFS
5547 remquo NEW: ISO C 9x
5548 remquof NEW: ISO C 9x
5549 remquol NEW: ISO C 9x
5551 roundf NEW: ISO C 9x
5552 roundl NEW: ISO C 9x
5554 scalbln NEW: ISO C 9x
5555 scalblnf NEW: ISO C 9x
5556 scalblnl NEW: ISO C 9x
5558 sendfile NEW: kernel
5559 setcontext NEW: Unix98
5560 setrlimit64 NEW: LFS
5561 setutxent NEW: Unix98
5563 sigignore NEW: Unix98
5564 sigqueue NEW: POSIX.1b
5565 sigrelse NEW: Unix98
5566 sigset NEW: POSIX.1b
5567 sigtimedwait NEW: POSIX.1b
5568 sigwaitinfo NEW: POSIX.1b
5569 sincos NEW: GNU ext.
5570 sincosf NEW: GNU ext.
5571 sincosl NEW: GNU ext.
5575 strcasestr NEW: GNU ext.
5576 strtoimax NEW: ISO C 9x
5577 strtoumax NEW: ISO C 9x
5578 strverscmp NEW: GNU ext.
5579 svcauthdes_stats NEW: Secure RPC
5580 svcunix_create NEW: sunrpc etx
5581 svcunixfd_create NEW: sunrpc ext
5582 swapcontext NEW: Unix98
5583 tcgetsid NEW: Unix98 PTY
5584 tdestroy NEW: GNU ext.
5585 tgamma NEW: ISO C 9x
5586 tgammaf NEW: ISO C 9x
5587 tgammal NEW: ISO C 9x
5591 truncf NEW: ISO C 9x
5592 truncl NEW: ISO C 9x
5594 unlockpt NEW: Unix98 PTY
5595 updwtmpx NEW: Unix98
5596 user2netname NEW: Secure RPC
5597 utmpxname NEW: Unix98
5598 versionsort NEW: GNU ext.
5599 versionsort64 NEW: GNU ext.
5601 wcscasecmp NEW: GNU ext.
5602 wcsncasecmp NEW: GNU ext.
5603 wcsnlen NEW: GNU ext.
5604 wcstoimax NEW: ISO C 9x
5605 wcstoll NEW: ISO C 9x
5606 wcstoull NEW: ISO C 9x
5607 wcstoumax NEW: ISO C 9x
5609 wordexp NEW: POSIX.2
5610 wordfree NEW: POSIX.2
5611 write_profiling REMOVED
5612 xdecrypt NEW: Secure RPC
5613 xdr_authdes_cred NEW: Secure RPC
5614 xdr_authdes_verf NEW: Secure RPC
5615 xdr_cryptkeyarg NEW: Secure RPC
5616 xdr_cryptkeyarg2 NEW: Secure RPC
5617 xdr_cryptkeyres NEW: Secure RPC
5618 xdr_getcredres NEW: Secure RPC
5619 xdr_key_netstarg NEW: Secure RPC
5620 xdr_key_netstres NEW: Secure RPC
5621 xdr_keybuf NEW: Secure RPC
5622 xdr_keystatus NEW: Secure RPC
5623 xdr_netnamestr NEW: Secure RPC
5624 xdr_sizeof NEW: Secure RPC
5625 xdr_unixcred NEW: sunrpc ext
5626 xencrypt NEW: Secure RPC
5627 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5638 * inet_ntoa is thread-safe
5640 * updwtmp is moved from libutil to libc
5642 * rewrite of cbrt function
5644 * update of timezone data
5658 * add atoll function
5660 * fix complex problems in Berkeley DB code
5662 * fix math functions
5666 * fixed lots of header problems (especially Linux/GNU specific)
5668 * dynamic loader preserves all registers
5670 * Roland McGrath provided support for handling of auxiliary objects in
5671 the ELF dynamic loader.
5673 * support for parallel builds is improved
5677 * GNU extensions are no longer declared by default. To enable them you
5678 must define the macro `_GNU_SOURCE' in your program or compile with
5681 * The library has changed from using GNU ld symbol aliases to using weak
5682 symbols where available. The ELF object file format supports weak
5683 symbols; GNU ld also supports weak symbols in the a.out format. (There
5684 is also now support for other GNU ld extensions in ELF. Use the
5685 `--with-elf' option to configure to indicate you have ELF, and
5686 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5687 of many files which contained only symbol aliases, reducing the size of
5688 the source and the compiled library; many other files were renamed to
5689 less cryptic names previously occupied by the symbol alias files.
5690 There is a new header file <elf.h> for programs which operate on
5691 files in the ELF format.
5693 * Converted to Autoconf version 2, so `configure' has more options.
5694 Run `configure --help' to see the details.
5696 * The library can now be configured to build profiling, highly-optimized
5697 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5698 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5699 `configure' enable building these extra libraries. The shared library is
5700 built by default when using both ELF and GNU ld. When shared libraries
5701 are enabled, the new library `-ldl' is available for arbitrary run-time
5702 loading of shared objects; its interface is defined in <dlfcn.h>. The
5703 new header file <link.h> gives access to the internals of the run-time
5704 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5705 application of same name on other systems and it provides information
5706 about dynamically linked binaries.
5708 * The C library now provides the run-time support code for profiling
5709 executables compiled with `-pg'. Programs can control the profiling code
5710 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5711 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5712 the support for this file format was contributed by David Mosberger-Tang.
5714 * The math code has been replaced with a math library based on fdlibm from
5715 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5716 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5717 functions. The math functions now reside in a separate library, so
5718 programs using them will need to use `-lm' their linking commands.
5720 * John C. Bowman contributed optimized ix87 assembler inline functions.
5722 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5723 mechanism similar to that found in Solaris 2. This is now used for the
5724 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5725 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5726 file controls what services are used for each individual database. This
5727 works by loading shared libraries with names specified in `nsswitch.conf',
5728 so service modules can be changed or added at any time without even
5729 relinking any program. Currently there are the file, db, and NIS based
5730 NSS services available.
5732 * The new functions `strtoq' and `strtouq' parse integer values from
5733 strings, like `strtol' and `strtoul', but they return `long long int' and
5734 `unsigned long long int' values, respectively (64-bit quantities).
5736 * The new functions `strtof' and `strtold' parse floating-point values from
5737 strings, like `strtod', but they return `float' and `long double' values,
5738 respectively (on some machines `double' and `long double' are the same).
5740 * Ulrich Drepper has contributed new implementations of the floating-point
5741 printing and reading code used in the `printf' family of functions and
5742 `strtod', `strtof', and `strtold'. These new functions are perfectly
5743 accurate, and much faster than the old ones.
5745 * The implementation of the POSIX locale model was completely rewritten by
5746 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5747 to compile the POSIX locale definition.
5749 * The former dummy implementations of the strcoll and strxfrm function are
5750 now replaced by fully functional code contributed by Ulrich Drepper. The
5751 collation information comes from the POSIX locale definitions.
5753 * The new header <langinfo.h> defines an interface for accessing
5754 various locale-dependent data (using the locale chosen with `setlocale').
5756 * Ulrich Drepper has contributed a new suite of functions for operation on
5757 wide-character and multibyte-character strings, in <wchar.h>;
5758 and classification and case conversion of wide characters, in <wctype.h>.
5759 These new functions are conforming to the ISO C, Amendement 1 specification.
5761 * There is now a second implementation of the standard I/O library available.
5762 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5763 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5765 * You can now use positional parameter specifications in format strings
5766 for the `printf' and `scanf' families of functions. For example,
5767 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5768 ``Number 6, Mr Jones''. This is mainly useful when providing different
5769 format strings for different languages, whose grammars may dictate
5770 different orderings of the values being printed. To support this
5771 feature, the interface for `register_printf_handler' has changed; see
5772 the header file <printf.h> for details.
5774 * The `printf' and `scanf' families of functions now understand a new
5775 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5776 to group numbers as indicated by the locale; for `scanf' and friends, this
5777 says to accept as valid only a number with all the proper grouping
5778 separators in the right places. In the default "C" locale, numbers are
5779 not grouped; but locales for specific countries will define the usual
5780 conventions (i.e. separate thousands with `,' in the US locale).
5782 * The pgrp functions have been regularized, slightly incompatibly but much
5783 less confusingly. The core functions are now `getpgid' and `setpgid',
5784 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5785 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5786 provided for compatibility. There is no longer an incompatible `getpgrp'
5787 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5789 * The new header file <fts.h> and suite of functions simplify programs that
5790 operate on directory trees. This code comes from 4.4 BSD.
5792 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5793 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5794 NSS scheme used in glibc.
5796 * There is a new malloc debugging hook `__memalign_hook'.
5798 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5799 `unsigned int' in <sys/types.h>. These are for compatibility only and
5800 their use is discouraged.
5802 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5803 done differently, so that it works even without GNU ld.
5805 * New function `euidaccess' checks allowed access to a file like `access',
5806 but using the effective IDs instead of the real IDs.
5808 * The time zone data files have been updated for the latest and greatest
5809 local time conventions of the countries of the world.
5811 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5814 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5815 for formatting floating-point numbers. They are provided only for
5816 compatibility; new programs should use `sprintf' instead. There are
5817 also equivalent function for the `long double' floating-point type and
5818 all functions also exist in a reentrant form.
5820 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5821 functions for maintaining the login-record files (primarily of use to
5822 system programs such as `login'), and convenient functions for
5823 allocating and initializing a pseudo-terminal (pty) device.
5825 * Ulrich Drepper has contributed new support for System V style
5826 shared memory and IPC on systems that support it.
5828 * Ulrich Drepper has contributed several miscellaneous new functions found
5829 in System V: The `hsearch' family of functions provide an effective
5830 implementation of hash tables; `a64l' and `l64a' provide a very simple
5831 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5834 * Ulrich Drepper has contributed new reentrant counterparts for the
5835 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5837 * Ulrich Drepper has contributed new, highly-optimized versions of several
5838 string functions for the i486/Pentium family of processors.
5840 * Ulrich Drepper has updated the Linux-specific code, based largely
5841 on work done in Hongjiu Lu's version of GNU libc for Linux.
5842 The GNU library now supports Linux versions 2.0.10 and later,
5843 using the ELF object file format (i[3456]86-*-linux).
5845 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5847 * David Mosberger-Tang and Richard Henderson have ported the C library
5848 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5849 dynamic linking support for ELF/Alpha.
5851 * Richard Henderson contributed several Alpha optimized assembler function
5852 for arithmetic and string handling.
5854 * Ulrich Drepper has contributed a new set of message catalog functions to
5855 support multiple languages using the <libintl.h> interface, for use with
5856 his new package GNU gettext. Translation volunteers have contributed
5857 catalogs of the library's messages in Spanish, German, and Korean.
5859 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5860 program and the `catgets' function for reading the catalog files it
5861 creates. (The <libintl.h> interface is preferred; we include the
5862 <nl_types.h> interface using `catgets' only for source compatibility with
5863 programs already written to use it.)
5865 * New header file <values.h> gives SVID-compatible names for <limits.h>
5868 * Various new macros, declarations, and small header files for compatibility
5871 * New function `group_member' is a convenient way to check if a process has
5872 a given effective group ID.
5874 * When using GCC 2.7 and later, the socket functions are now declared in a
5875 special way so that passing an argument of type `struct sockaddr_in *',
5876 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5877 `struct sockaddr *' type, does not generate a type-clash warning.
5879 * New function `error' declared in header file <error.h> is a convenient
5880 function for printing error messages and optionally exiting; this is the
5881 canonical function used in GNU programs. The new functions `err', `warn',
5882 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5883 doing the same thing.
5885 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5886 POSIX.2 `glob' function to do ~ and {...} expansion.
5888 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5889 `clearenv' which is used in POSIX.9 is also available.
5891 * New function `getsid' returns session ID number on systems that support it.
5893 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5894 files <db.h> and <mpool.h> provide a rich set of functions for several
5895 types of simple databases stored in memory and in files, and <ndbm.h> is
5896 an old `ndbm'-compatible interface using the `db' functions. Link with
5897 `-ldb' to get these functions.
5899 * New macro `strdupa' copies a string like `strdup', but uses local stack
5900 space from `alloca' instead of dynamic heap space from `malloc'.
5902 * New function `strnlen' is like `strlen' but searches only a given maximum
5903 number of characters for the null terminator. `stpncpy', `strndup' and
5904 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5907 * New function `statfs' in header <sys/statfs.h>.
5909 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5910 provide convenient functions for operating on blocks of null-terminated
5913 * A new suite of functions in <utmp.h> handle all the details of reading
5914 and writing the utmp file.
5916 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5919 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5920 completely POSIX compliant and also implemented the extended functionality
5921 to handle alternate digit representation and alternate era date formats.
5923 * Ulrich Drepper provided an implementation of the `strptime' function
5924 defined in XPG4.2 which transforms a string into a `struct tm' value.
5926 * Paul Eggert provided the tzselect shell script as part of the timezone
5927 code. The shell script makes it easy to select the correct timezone
5930 * The implementation of the malloc family of functions is completely replaced
5931 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5932 The implementation uses the mmap function (if available) and it is
5933 optimized for the use in multi threaded programs.
5935 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5936 functions. This new functionality is usable by specifying a special
5937 salt string and it is compatible with implementation on *BSD systems.
5939 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5940 `getsubopt' to handle second level command line options, `bsd_signal'
5941 to access BSD style `signal' functionality, the obsolete `regexp' style
5944 * the `lchown' function is available on system which support this
5947 * The implementation of the shadow password handling function was contributed
5950 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5952 * POSIX.1g support was added. The <sys/select.h> header is available,
5953 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5954 implementation of `getaddrinfo'.
5958 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5960 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5961 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5963 * The new function `daemon' from 4.4 BSD is useful for server programs that
5964 want to put themselves in the background.
5966 * Joel Sherrill has contributed support for several standalone boards that
5967 run without an operating system.
5969 * `printf', `scanf' and friends now accept a `q' type modifier for long
5970 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5972 * All of the code taken from BSD (notably most of the math and networking
5973 routines) has been updated from the BSD 4.4-Lite release.
5975 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5977 * The new functions `getdomainname' and `setdomainname' fetch or change the
5978 YP/NIS domain name. These are system calls which exist on systems which
5981 * The time zone data files have been updated for the latest international
5984 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5985 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5989 * The C library now includes support for Sun RPC, from Sun's free
5990 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5991 are included. (There is still no support for YP.)
5993 * Tom Quinn has contributed a port of the C library to SGI machines running
5994 Irix 4 (mips-sgi-irix4).
5996 * The new `lockf' function is a simplified interface to the locking
5997 facilities of `fcntl', included for compatibility.
5999 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
6001 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
6003 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
6006 * The error message printed by `assert' for a failed assertion now includes
6007 the name of the program (if using GNU ld) and the name of the calling
6008 function (with versions of GCC that support this).
6010 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
6012 * The library now includes the <sys/mman.h> header file and memory
6013 management functions `mmap', `munmap', `mprotect', `msync', and
6014 `madvise', on systems that support those facilities.
6016 * The interface for `mcheck' has changed slightly: the function called to
6017 abort the program when an allocation inconsistency is detected now takes
6018 an argument that indicates the type of failure. The new function
6019 `mprobe' lets you request a consistency check for a particular block at
6020 any time (checks are normally done only when you call `free' or `realloc'
6023 * It is now possible to easily cross-compile the C library, building on one
6024 system a library to run on another machine and/or operating system. All
6025 you need to do is set the variable `HOST_CC' in `configparms' to the
6026 native compiler for programs to run on the machine you are building on (a
6027 few generator programs are used on Unix systems); set `CC' to the
6030 * The new function `fexecve' (only implemented on the GNU system) executes
6031 a program file given a file descriptor already open on the file.
6035 * Brendan Kehoe has contributed most of a port to the DEC Alpha
6036 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
6038 * You can set the variable `libprefix' in `configparms' to specify a prefix
6039 to be prepended to installed library files; this makes it easy to install
6040 the GNU C library to be linked as `-lgnuc' or whatever.
6042 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
6043 copies a limited number of characters from a string, and returns the
6044 address of the last character written.
6046 * You no longer need to check for whether the installed `stddef.h' is
6047 compatible with the GNU C library. configure now checks for you.
6049 * You can now define a per-stream `fileno' function to convert the
6050 stream's cookie into an integral file descriptor.
6052 * ``malloc (0)'' no longer returns a null pointer. Instead, it
6053 allocates zero bytes of storage, and returns a unique pointer which
6054 you can pass to `realloc' or `free'. The behavior is undefined if
6055 you dereference this pointer.
6057 * The C library now runs on Sony NEWS m68k machines running either
6058 NewsOS 3 or NewsOS 4.
6060 * The new `syscall' function is a system-dependent primitive function
6061 for invoking system calls. It has the canonical behavior on Unix
6062 systems, including unreliable return values for some calls (such as
6063 `pipe', `fork' and `getppid').
6065 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
6066 to `EAGAIN', which is the preferred name. On systems whose kernels
6067 use two distinct codes, the C library now translates EWOULDBLOCK to
6068 EAGAIN in every system call function.
6072 * The GNU C Library Reference Manual is now distributed with the library.
6073 `make dvi' will produce a DVI file of the printed manual.
6074 `make info' will produce Info files that you can read on line using C-h i
6075 in Emacs or the `info' program.
6076 Please send comments on the manual to bug-glibc-manual@gnu.org.
6078 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
6080 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
6082 * Jason Merrill has contributed a port to the Sequent Symmetry running
6083 Dynix version 3 (i386-sequent-dynix).
6085 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
6086 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
6088 * New function `memory_warnings' lets you arrange to get warnings when
6089 malloc is running out of memory to allocate, like Emacs gives you.
6091 * The C library now contains the relocating allocator used in Emacs 19 for
6092 its editing buffers. This allocator (ralloc) minimizes allocation
6093 overhead and fragmentation by moving allocated regions around whenever it
6094 needs to. You always refer to a ralloc'd region with a "handle" (a
6095 pointer to a pointer--an object of type `void **').
6097 * There is a new `printf' format: `%m' gives you the string corresponding
6098 to the error code in `errno'.
6100 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
6101 or `%[' conversion, but instead of filling in a fixed-sized buffer you
6102 pass, the `a' modifier says to fill in a `char **' you pass with a
6105 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
6106 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
6107 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
6109 * `mkstemp' is a traditional Unix function to atomically create and open a
6110 uniquely-named temporary file.
6114 * The standard location for the file that says what the local timezone is
6115 has changed again. It is now `/usr/local/etc/localtime' (or more
6116 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
6118 * The distribution no longer contains any files with names longer than 14
6121 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
6122 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
6124 * New functions `ttyslot' and `syslog' from 4.4 BSD.
6128 * The configuration process has changed quite a bit. The `configure'
6129 script is now used just like the configuration scripts for other GNU
6130 packages. The `sysdeps' directory hierarchy is much rearranged.
6131 The file `INSTALL' explains the new scheme in detail.
6133 * The header files no longer need to be processed into ANSI C and
6134 traditional C versions. There is just one set of files to install, and
6135 it will work with ANSI or old C compilers (including `gcc -traditional').
6137 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
6138 MIPS DECStation running Ultrix 4.
6140 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
6141 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
6142 made itself into a shared library.
6144 * Yet further improved support for the i386, running 4.3 BSD-like systems
6145 (such as Mach 3 with the Unix single-server), or System V.
6147 * New function `strncasecmp' to do case-insensitive string comparison
6148 with limited length.
6150 * New function `strsep' is a reentrant alternative to `strtok'.
6152 * New functions `scandir' and `alphasort' for searching directories.
6154 * New function `setenv' is a better interface to `putenv'.
6156 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
6157 function for traversing a directory tree.
6159 * The GNU obstack package is now also part of the C library.
6160 The new function `open_obstack_stream' creates a stdio stream that
6161 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
6162 formatted output directly to an obstack.
6164 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
6165 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
6167 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
6169 * The new functions `strfry' and `memfrob' do mysterious and wonderful
6170 things to your strings.
6172 * There are some new test programs: test-fseek, testmb, and testrand.
6174 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
6175 These ports are not finished, but are a good starting place for really
6176 supporting those systems.
6178 * `/etc/localtime' is now the standard location for the file that says what
6179 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
6180 This follows the general principle that `/etc' is the place for all local
6181 configuration files.
6183 * The C library header files now use `extern "C"' when used by the C++
6184 compiler, so the C library should now work with C++ code.
6186 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
6187 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
6190 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
6191 function which uses the `merge sort' algorithm, and is said to be
6192 significantly faster than the old GNU `qsort' function. Merge sort is
6193 now the standard `qsort' function. The new algorithm can require a lot
6194 of temporary storage; so, the old sorting function is called when the
6195 required storage is not available.
6197 * The C library now includes Michael Glad's Ultra Fast Crypt, which
6198 provides the Unix `crypt' function, plus some other entry points.
6200 * The code and header files taken from 4.4 BSD have been updated with the
6201 latest files released from Berkeley.
6203 ----------------------------------------------------------------------
6204 Copyright information:
6206 Copyright (C) 1992-2020 Free Software Foundation, Inc.
6208 Permission is granted to anyone to make or distribute verbatim copies
6209 of this document as received, in any medium, provided that the
6210 copyright notice and this permission notice are preserved,
6211 thus giving the recipient permission to redistribute in turn.
6213 Permission is granted to distribute modified versions
6214 of this document, or of portions of it,
6215 under the above conditions, provided also that they
6216 carry prominent notices stating who last changed them.
6219 version-control: never