1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2021 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * In order to support smoother in-place-upgrades and to simplify
13 the implementation of the runtime all functionality formerly
14 implemented in the libraries libpthread, libdl, libutil, libanl has
15 been integrated into libc. New applications do not need to link with
16 -lpthread, -ldl, -lutil, -lanl anymore. For backwards compatibility,
17 empty static archives libpthread.a, libdl.a, libutil.a, libanl.a are
18 provided, so that the linker options keep working. Applications which
19 have been linked against glibc 2.33 or earlier continue to load the
20 corresponding shared objects (which are now empty). The integration
21 of those libraries into libc means that additional symbols become
22 available by default. This can cause applications that contain weak
23 references to take unexpected code paths that would only have been
24 used in previous glibc versions when e.g. preloading libpthread.so.0,
25 potentially exposing application bugs.
27 * When _DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined,
28 PTHREAD_STACK_MIN is no longer constant and is redefined to
29 sysconf(_SC_THREAD_STACK_MIN). This supports dynamic sized register
30 sets for modern architectural features like Arm SVE.
32 * Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ. When _DYNAMIC_STACK_SIZE_SOURCE
33 or _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer
34 constant on Linux. MINSIGSTKSZ is redefined to sysconf(_SC_MINSIGSTKSZ)
35 and SIGSTKSZ is redefined to sysconf (_SC_SIGSTKSZ). This supports
36 dynamic sized register sets for modern architectural features like
39 * The dynamic linker implements the --list-diagnostics option, printing
40 a dump of information related to IFUNC resolver operation and
41 glibc-hwcaps subdirectory selection.
43 * On Linux, the function execveat has been added. It operates similar to
44 execve and it is is already used to implement fexecve without requiring
45 /proc to be mounted. However, different than fexecve, if the syscall is not
46 supported by the kernel an error is returned instead of trying a fallback.
48 * The ISO C2X function timespec_getres has been added.
50 * The feature test macro __STDC_WANT_IEC_60559_EXT__, from draft ISO
51 C2X, is supported to enable declarations of functions defined in Annex F
52 of C2X. Those declarations are also enabled when
53 __STDC_WANT_IEC_60559_BFP_EXT__, as specified in TS 18661-1, is
54 defined, and when _GNU_SOURCE is defined.
56 * On powerpc64*, glibc can now be compiled without scv support using the
57 --disable-scv configure option.
59 * Add support for 64-bit time_t on configurations like x86 where time_t
60 is traditionally 32-bit. Although time_t still defaults to 32-bit on
61 these configurations, this default may change in future versions.
62 This is enabled with the _TIME_BITS preprocessor macro set to 64 and is
63 only supported when LFS (_FILE_OFFSET_BITS=64) is also enabled. It is
64 only enabled for Linux and the full support requires a minimum kernel
67 * The main gconv-modules file in glibc now contains only a small set of
68 essential converter modules and the rest have been moved into a supplementary
69 configuration file gconv-modules-extra.conf in the gconv-modules.d directory
70 in the same GCONV_PATH. Similarly, external converter modules directories
71 may have supplementary configuration files in a gconv-modules.d directory
72 with names ending with .conf to logically classify the converter modules in
75 * On Linux, a new tunable, glibc.pthread.stack_cache_size, can be used
76 to configure the size of the thread stack cache.
78 * The function _Fork has been added as an async-signal-safe fork replacement
79 since Austin Group issue 62 droped the async-signal-safe requirement for
80 fork (and it will be included in the future POSIX standard). The new _Fork
81 function does not run any atfork function neither resets any internal state
82 or lock (such as the malloc one), and only sets up a minimal state required
83 to call async-signal-safe functions (such as raise or execve). This function
84 is currently a GNU extension.
86 * On Linux, the close_range function has been added. It allows efficiently
87 closing a range of file descriptors on recent kernels (version 5.9).
89 * The function closefrom has been added. It closes all file descriptors
90 greater than or equal to a given integer. This function is a GNU extension,
91 although it is also present in other systems.
93 * The posix_spawn_file_actions_addclosefrom_np function has been added,
94 enabling posix_spawn and posix_spawnp to close all file descriptors greater
95 than or equal to a given integer. This function is a GNU extension,
96 although Solaris also provides a similar function.
98 Deprecated and removed features, and other changes affecting compatibility:
100 * The function pthread_mutex_consistent_np has been deprecated; programs
101 should use the equivalent standard function pthread_mutex_consistent
104 * The function pthread_mutexattr_getrobust_np has been deprecated;
105 programs should use the equivalent standard function
106 pthread_mutexattr_getrobust instead.
108 * The function pthread_mutexattr_setrobust_np has been deprecated;
109 programs should use the equivalent standard function
110 pthread_mutexattr_setrobust instead.
112 * The function pthread_yield has been deprecated; programs should use
113 the equivalent standard function sched_yield instead.
115 * The function inet_neta declared in <arpa/inet.h> has been deprecated.
117 * Various rarely-used functions declared in <resolv.h> and
118 <arpa/nameser.h> have been deprecated. Applications are encouraged to
119 use dedicated DNS processing libraries if applicable. For <resolv.h>,
120 this affects the functions dn_count_labels, fp_nquery, fp_query,
121 fp_resstat, hostalias, loc_aton, loc_ntoa, p_cdname, p_cdnname,
122 p_class, p_fqname, p_fqnname, p_option, p_query, p_rcode, p_time,
123 p_type, putlong, putshort, res_hostalias, res_isourserver,
124 res_nameinquery, res_queriesmatch, res_randomid, sym_ntop, sym_ntos,
125 sym_ston. For <arpa/nameser.h>, the functions ns_datetosecs,
126 ns_format_ttl, ns_makecanon, ns_parse_ttl, ns_samedomain, ns_samename,
127 ns_sprintrr, ns_sprintrrf, ns_subdomain have been deprecated.
129 * Various symbols previously defined in libresolv have been moved to libc
130 in order to prepare for libresolv moving entirely into libc (see earlier
131 entry for merging libraries into libc). The symbols __dn_comp,
132 __dn_expand, __dn_skipname, __res_dnok, __res_hnok, __res_mailok,
133 __res_mkquery, __res_nmkquery, __res_nquery, __res_nquerydomain,
134 __res_nsearch, __res_nsend, __res_ownok, __res_query, __res_querydomain,
135 __res_search, __res_send formerly in libresolv have been renamed and no
136 longer have a __ prefix. They are now available in libc.
138 * The pthread cancellation handler is now installed with SA_RESTART and
139 pthread_cancel will always send the internal SIGCANCEL on a cancellation
140 request. It should not be visible to applications since the cancellation
141 handler should either act upon cancellation (if asynchronous cancellation
142 is enabled) or ignore the cancellation internal signal. However there are
143 buggy kernel interfaces (for instance some CIFS versions) that could still
144 see a spurious EINTR error when cancellation interrupts a blocking syscall.
146 * Previously, glibc installed its various shared objects under versioned
147 file names such as libc-2.33.so. The ABI sonames (e.g., libc.so.6)
148 were provided as symbolic links. Starting with glibc 2.34, the shared
149 objects are installed under their ABI sonames directly, without
150 symbolic links. This increases compatibility with distribution
151 package managers that delete removed files late during the package
152 upgrade or downgrade process.
154 * The symbols mallwatch and tr_break are now deprecated and no longer used in
155 mtrace. Similar functionality can be achieved by using conditional
156 breakpoints within mtrace functions from within gdb.
158 * The __morecore and __after_morecore_hook malloc hooks and the default
159 implementation __default_morecore have been removed from the API. Existing
160 applications will continue to link against these symbols but the interfaces
161 no longer have any effect on malloc.
163 * Debugging features in malloc such as the MALLOC_CHECK_ environment variable
164 (or the glibc.malloc.check tunable), mtrace() and mcheck() have now been
165 disabled by default in the main C library. Users looking to use these
166 features now need to preload a new debugging DSO libc_malloc_debug.so to get
167 this functionality back.
169 * The deprecated functions malloc_get_state and malloc_set_state have been
170 moved from the core C library into libc_malloc_debug.so. Legacy applications
171 that still use these functions will now need to preload libc_malloc_debug.so
172 in their environment using the LD_PRELOAD environment variable.
174 * The deprecated memory allocation hooks __malloc_hook, __realloc_hook,
175 __memalign_hook and __free_hook are now removed from the API. Compatibility
176 symbols are present to support legacy programs but new applications can no
177 longer link to these symbols. These hooks no longer have any effect on glibc
178 functionality. The malloc debugging DSO libc_malloc_debug.so currently
179 supports hooks and can be preloaded to get this functionality back for older
180 programs. However this is a transitional measure and may be removed in a
181 future release of the GNU C Library. Users may port away from these hooks by
182 writing and preloading their own malloc interposition library.
184 Changes to build and runtime requirements:
186 * On Linux, the shm_open, sem_open, and related functions now expect the
187 file shared memory file system to be mounted at /dev/shm. These functions
188 no longer search among the system's mount points for a suitable
189 replacement if /dev/shm is not available.
191 Security related changes:
193 CVE-2021-27645: The nameserver caching daemon (nscd), when processing
194 a request for netgroup lookup, may crash due to a double-free,
195 potentially resulting in degraded service or Denial of Service on the
196 local system. Reported by Chris Schanzle.
198 CVE-2021-33574: The mq_notify function has a potential use-after-free
199 issue when using a notification type of SIGEV_THREAD and a thread
200 attribute with a non-default affinity mask.
202 CVE-2021-35942: The wordexp function may overflow the positional
203 parameter number when processing the expansion resulting in a crash.
204 Reported by Philippe Antoine.
206 The following bugs are resolved with this release:
208 [4737] libc: fork is not async-signal-safe
209 [5781] math: Slow dbl-64 sin/cos/sincos for special values
210 [10353] libc: Methods for deleting all file descriptors greater than
211 given integer (closefrom)
212 [14185] glob: fnmatch() fails when '*' wildcard is applied on the file
213 name containing multi-byte character(s)
214 [14469] math: Inaccurate j0f function
215 [14470] math: Inaccurate j1f function
216 [14471] math: Inaccurate y0f function
217 [14472] math: Inaccurate y1f function
218 [14744] nptl: kill -32 $pid or kill -33 $pid on a process cancels a
220 [15271] dynamic-link: dlmopen()ed shared library with LM_ID_NEWLM
221 crashes if it fails dlsym() twice
222 [15648] nptl: multiple definition of `__lll_lock_wait_private'
223 [16063] nptl: Provide a pthread_once variant in libc directly
224 [17144] libc: syslog is not thread-safe if NO_SIGPIPE is not defined
225 [17145] libc: syslog with LOG_CONS leaks console file descriptor
226 [17183] manual: description of ENTRY struct in <search.h> in glibc
228 [18435] nptl: pthread_once hangs when init routine throws an exception
229 [18524] nptl: Missing calloc error checking in
230 __cxa_thread_atexit_impl
231 [19329] dynamic-link: dl-tls.c assert failure at concurrent
232 pthread_create and dlopen
233 [19366] nptl: returning from a thread should disable cancellation
234 [19511] nptl: 8MB memory leak in pthread_create in case of failure
235 when non-root user changes priority
236 [20802] dynamic-link: getauxval NULL pointer dereference after static
238 [20813] nptl: pthread_exit is inconsistent between libc and libpthread
239 [22057] malloc: malloc_usable_size is broken with mcheck
240 [22668] locale: LC_COLLATE: the last character of ellipsis is not
242 [23323] libc: [RFE] CSU startup hardening.
243 [23328] malloc: Remove malloc hooks and ensure related APIs return no
245 [23462] dynamic-link: Static binary with dynamic string tokens ($LIB,
246 $PLATFORM, $ORIGIN) crashes
247 [23489] libc: "gcc -lmcheck" aborts on free when using posix_memalign
248 [23554] nptl: pthread_getattr_np reports wrong stack size with
250 [24106] libc: Bash interpreter in ldd script is taken from host
251 [24773] dynamic-link: dlerror in an secondary namespace does not use
252 the right free implementation
253 [25036] localedata: Update collation order for Swedish
254 [25383] libc: where_is_shmfs/__shm_directory/SHM_GET_NAME may cause
255 shm_open to pick wrong directory
256 [25680] dynamic-link: ifuncmain9picstatic and ifuncmain9picstatic
257 crash in IFUNC resolver due to stack canary (--enable-stack-
259 [26874] build: -Warray-bounds in _IO_wdefault_doallocate
260 [26983] math: [x86_64] x86_64 tgamma has too large ULP error
261 [27111] dynamic-link: pthread_create and tls access use link_map
262 objects that may be concurrently freed by dlclose
263 [27132] malloc: memusagestat is linked to system librt, leading to
264 undefined symbols on major version upgrade
265 [27136] dynamic-link: dtv setup at thread creation may leave an entry
267 [27249] libc: libSegFault.so does not output signal number properly
268 [27304] nptl: pthread_cond_destroy does not pass private flag to futex
270 [27318] dynamic-link: glibc fails to load binaries when built with
271 -march=sandybridge: CPU ISA level is lower than required
272 [27343] nss: initgroups() SIGSEGVs when called on a system without
273 nsswich.conf (in a chroot)
274 [27346] dynamic-link: x86: PTWRITE feature check is missing
275 [27389] network: NSS chroot hardening causes regressions in chroot
277 [27403] dynamic-link: aarch64: tlsdesc htab is not freed on dlclose
278 [27444] libc: sysconf reports unsupported option (-1) for
279 _SC_LEVEL1_ICACHE_LINESIZE on X86 since v2.33
280 [27462] nscd: double-free in nscd (CVE-2021-27645)
281 [27468] malloc: aarch64: realloc crash with heap tagging: FAIL:
282 malloc/tst-malloc-thread-fail
283 [27498] dynamic-link: __dl_iterate_phdr lacks unwinding information
284 [27511] libc: S390 memmove assumes Vector Facility when MIE Facility 3
286 [27522] glob: glob, glob64 incorrectly marked as __THROW
287 [27555] dynamic-link: Static tests fail with --enable-stack-
289 [27559] libc: fstat(AT_FDCWD) succeeds (it shouldn't) and returns
290 information for the current directory
291 [27577] dynamic-link: elf/ld.so --help doesn't work
292 [27605] libc: tunables can't control xsave/xsavec selection in
294 [27623] libc: powerpc: Missing registers in sc[v] clobbers list
295 [27645] libc: [linux] sysconf(_SC_NPROCESSOR...) breaks down on
297 [27646] dynamic-link: Linker error for non-existing NSS symbols (e.g.
298 _nss_files_getcanonname_r) from within a dlmopen namespace.
299 [27648] libc: FAIL: misc/tst-select
300 [27650] stdio: vfscanf returns too early if a match is longer than
302 [27651] libc: Performance regression after updating to 2.33
303 [27655] string: Wrong size calculation in string/test-strnlen.c
304 [27706] libc: select fails to update timeout on error
305 [27709] libc: arm: FAIL: debug/tst-longjmp_chk2
306 [27721] dynamic-link: x86: ld_audit ignores bind now for TLSDESC and
307 tries resolving them lazily
308 [27744] nptl: Support different libpthread/ld.so load orders in
310 [27749] libc: Data race __run_exit_handlers
311 [27761] libc: getconf: Segmentation fault when passing '-vq' as
313 [27832] nss: makedb.c:797:7: error: 'writev' specified size 4294967295
314 exceeds maximum object size 2147483647
315 [27870] malloc: MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to
317 [27872] build: Obsolete configure option --enable-stackguard-
319 [27873] build: tst-cpu-features-cpuinfo fail when building on AMD cpu
320 [27882] localedata: Use U+00AF MACRON in more EBCDIC charsets
321 [27892] libc: powerpc: scv ABI error handling fails to check
323 [27896] nptl: mq_notify does not handle separately allocated thread
324 attributes (CVE-2021-33574)
325 [27901] libc: TEST_STACK_ALIGN doesn't work
326 [27902] libc: The x86-64 clone wrapper fails to align child stack
327 [27914] nptl: Install SIGSETXID handler with SA_ONSTACK
328 [27939] libc: aarch64: clone does not align the stack
329 [27968] libc: s390x: clone does not align the stack
330 [28011] libc: Wild read in wordexp (parse_param) (CVE-2021-35942)
331 [28024] string: s390(31bit): Wrong result of memchr (MEMCHR_Z900_G5)
333 [28028] malloc: malloc: tcache shutdown sequence does not work if the
334 thread never allocated anything
335 [28033] libc: Need to check RTM_ALWAYS_ABORT for RTM
336 [28064] string: x86_64:wcslen implementation list has wcsnlen
337 [28067] libc: FAIL: posix/tst-spawn5
338 [28068] malloc: FAIL: malloc/tst-mallocalign1-mcheck
339 [28071] time: clock_gettime, gettimeofday, time lost vDSO acceleration
341 [28075] nis: Out-of-bounds static buffer read in nis_local_domain
342 [28089] build: tst-tls20 fails when linker defaults to --as-needed
343 [28090] build: elf/tst-cpu-features-cpuinfo-static fails on certain
345 [28091] network: ns_name_skip may return 0 for domain names without
353 * The dynamic linker accepts the --list-tunables argument which prints
354 all the supported tunables. This option is disable if glibc is
355 configured with tunables disabled (--enable-tunables=no).
357 * The dynamic linker accepts the --argv0 argument and provides opportunity
358 to change argv[0] string.
360 * The dynamic linker loads optimized implementations of shared objects
361 from subdirectories under the glibc-hwcaps directory on the library
362 search path if the system's capabilities meet the requirements for
363 that subdirectory. Initially supported subdirectories include
364 "power9" and "power10" for the powerpc64le-linux-gnu architecture,
365 "z13", "z14", "z15" for s390x-linux-gnu, and "x86-64-v2", "x86-64-v3",
366 "x86-64-v4" for x86_64-linux-gnu. In the x86_64-linux-gnu case, the
367 subdirectory names correspond to the vendor-independent x86-64
368 microarchitecture levels defined in the x86-64 psABI supplement.
370 * The new --help option of the dynamic linker provides usage and
371 information and library search path diagnostics.
373 * The mallinfo2 function is added to report statistics as per mallinfo,
374 but with larger field widths to accurately report values that are
375 larger than fit in an integer.
377 * Add <sys/platform/x86.h> to provide query macros for x86 CPU features.
379 * Support for the RISC-V ISA running on Linux has been expanded to run on
380 32-bit hardware. This is supported for the following ISA and ABI pairs:
386 The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils
389 * A new fortification level _FORTIFY_SOURCE=3 is available. At this level,
390 glibc may use additional checks that may have an additional performance
391 overhead. At present these checks are available only on LLVM 9 and later.
392 The latest GCC available at this time (10.2) does not support this level of
395 Deprecated and removed features, and other changes affecting compatibility:
397 * The mallinfo function is marked deprecated. Callers should call
400 * When dlopen is used in statically linked programs, alternative library
401 implementations from HWCAP subdirectories are no longer loaded.
402 Instead, the default implementation is used.
404 * The deprecated <sys/vtimes.h> header and the function vtimes have been
405 removed. To support old binaries, the vtimes function continues to exist
406 as a compatibility symbol. Applications should use the getrlimit or
409 * Following a change in the tzdata 2018a release upstream, the zdump
410 program is now installed in the /usr/bin subdirectory. Previously,
411 the /usr/sbin subdirectory was used.
413 * On s390(x), the type float_t is now derived from the macro
414 __FLT_EVAL_METHOD__ that is defined by the compiler, instead of being
415 hardcoded to double. This does not affect the ABI of any libraries
416 that are part of the GNU C Library, but may affect the ABI of other
417 libraries that use this type in their interfaces. The new definition
418 improves consistency with compiler behavior in many scenarios.
420 * A future version of glibc will stop loading shared objects from the
421 "tls" subdirectories on the library search path, the subdirectory that
422 corresponds to the AT_PLATFORM system name, and also stop employing
423 the legacy AT_HWCAP search mechanism. Applications should switch to
424 the new glibc-hwcaps mechanism instead; if they do not do that, only
425 the baseline version (directly from the search path directory) will be
428 Changes to build and runtime requirements:
430 * On Linux, the system administrator needs to configure /dev/pts with
431 the intended access modes for pseudo-terminals. glibc no longer
432 attemps to adjust permissions of terminal devices. The previous glibc
433 defaults ("tty" group, user read/write and group write) already
434 corresponded to what most systems used, so that grantpt did not
435 perform any adjustments.
437 * On Linux, the posix_openpt and getpt functions no longer attempt to
438 use legacy (BSD) pseudo-terminals and assume that if /dev/ptmx exists
439 (and pseudo-terminals are supported), a devpts file system is mounted
440 on /dev/pts. Current systems already meet these requirements.
442 * s390x requires GCC 7.1 or newer. See gcc Bug 98269.
444 Security related changes:
446 CVE-2021-3326: An assertion failure during conversion from the
447 ISO-20220-JP-3 character set using the iconv function has been fixed.
448 This assertion was triggered by certain valid inputs in which the
449 converted output contains a combined sequence of two wide characters
450 crossing a buffer boundary. Reported by Tavis Ormandy.
452 CVE-2020-27618: An infinite loop has been fixed in the iconv program when
453 invoked with input containing redundant shift sequences in the IBM1364,
454 IBM1371, IBM1388, IBM1390, or IBM1399 character sets.
456 CVE-2020-29562: An assertion failure has been fixed in the iconv function
457 when invoked with UCS4 input containing an invalid character.
459 CVE-2019-25013: A buffer overflow has been fixed in the iconv function when
460 invoked with EUC-KR input containing invalid multibyte input sequences.
462 The following bugs are resolved with this release:
464 [10635] libc: realpath portability patches
465 [16124] dynamic-link: ld.so should allow to change argv[0]
466 [17924] malloc: 'free' should not set errno
467 [18683] libc: Linux faccessat implementation can incorrectly ignore
469 [22899] libc: Use 64-bit readdir() in generic POSIX getcwd()
470 [23091] hurd: missing waitid support
471 [23249] libc: Epyc and other current AMD CPUs do not select the
472 "haswell" platform subdirectory
473 [24080] dynamic-link: Definition of "haswell" platform is inconsistent
475 [24202] libc: m68k setjmp() saves incorrect 'a5' register in --enable-
477 [24941] libc: Make grantpt usable after multi-threaded fork in more
479 [24970] libc: realpath mishandles EOVERFLOW; stat not needed anyway
480 [24973] locale: iconv encounters segmentation fault when converting
481 0x00 0xfe in EUC-KR to UTF-8 (CVE-2019-25013)
482 [25399] string: undefined reference to `__warn_memset_zero_len' when
483 changing gnuc version
484 [25859] libc: glibc parser for /sys/devices/system/cpu/online is
486 [25938] dynamic-link: ld.so.cache should store meaning of hwcap mask
488 [25971] libc: s390 bits/hwcap.h out of sync with kernel
489 [26053] libc: unlockpt fails with ENOTTY for non-ptmx descriptors
490 [26100] libc: Race in syslog(3) with regards to tag printing.
491 [26124] libc: Export <cpu-features.h>
492 [26130] nscd: Inconsistent nscd cache during pruning
493 [26203] libc: GLRO(dl_x86_cpu_features) may not be intialized
494 [26224] locale: iconv hangs when converting some invalid inputs from
495 several IBM character sets (CVE-2020-27618)
496 [26341] libc: realpath cyclically call __alloca(path_max) to consume
498 [26343] manual: invalid documented return type for strerrorname_np(),
499 strerrordesc_np(), sigdescr_np(), sigabbrev_np()
500 [26376] libc: Namespace violation in stdio.h and sys/stat.h if build
502 [26383] locale: bind_textdomain_codeset doesn't accept //TRANSLIT
504 [26394] time: [2.33 Regression] FAIL: nptl/tst-join14
505 [26534] math: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on
507 [26552] dynamic-link: CPU_FEATURE_USABLE_P should be more conservative
508 [26553] libc: mtx_init allows type set to "mtx_recursive" only
509 [26555] string: strerrorname_np does not return the documented value
510 [26592] libc: pointer arithmetic overflows in realpath
511 [26600] network: Transaction ID collisions cause slow DNS lookups in
513 [26606] libc: [2.33 Regression] pselect is broken on x32
514 [26615] libc: powerpc: libc segfaults when LD_PRELOADed with libgcc
515 [26620] glob: fnmatch with collating symbols results in segmentation
517 [26625] libc: [2.33 Regression] CET is disabled
518 [26636] libc: 32-bit shmctl(IPC_INFO) crashes when shminfo struct is
519 at the end of a memory mapping
520 [26637] libc: semctl SEM_STAT_ANY fails to pass the buffer specified
521 by the caller to the kernel
522 [26639] libc: msgctl IPC_INFO and MSG_INFO return garbage
523 [26647] build: [-Werror=array-parameter=] due to different
524 declarations for __sigsetjmp
525 [26648] libc: mkstemp is likely to fail on systems with non-stricly-
527 [26649] stdio: printf should handle non-normal x86 long double numbers
528 gracefully (CVE-2020-29573)
529 [26686] build: -Warray-parameter instances building with GCC 11
530 [26687] build: -Warray-bounds instances building with GCC 11
531 [26690] stdio: Aliasing violation in __vfscanf_internal
532 [26691] nptl: Use a minimum guard size of 64 KiB on aarch64
533 [26726] build: GCC warning calling new_composite_name with an array of
535 [26736] libc: FAIL: misc/tst-sysvshm-linux
536 [26737] libc: Random FAIL: rt/tst-shm
537 [26791] libc: Missing O_CLOEXEC in sysconf.c
538 [26798] dynamic-link: aarch64: variant PCS symbols may be incorrectly
540 [26801] nptl: pthread_mutex_clocklock with CLOCK_MONOTONIC can fail on
542 [26818] string: aarch64: string tests may run ifunc variants that are
544 [26821] libc: Memory leak test failures on Fedora 33
545 [26824] libc: FAIL: elf/tst-cpu-features-supports with recent trunk:
546 FSGSBASE/LM/RDRAND check failure
547 [26833] time: adjtime() with delta == NULL segfaults on armv7 32bit
549 [26853] libc: aarch64: Missing unwind information in statically linked
551 [26923] locale: Assertion failure in iconv when converting invalid
552 UCS4 (CVE-2020-29562)
553 [26926] dynamic-link: aarch64: library dependencies are not bti
555 [26932] libc: sh: Multiple floating point functions defined as stubs
557 [26964] nptl: pthread_mutex_timedlock returning EAGAIN after futex is
559 [26988] dynamic-link: aarch64: BTI mprotect address is not page
561 [27002] build: libc_freeres_fn build failure with GCC 11
562 [27004] dynamic-link: ld.so is miscompiled by GCC 11
563 [27008] dynamic-link: ld.so.cache should have endianness markup
564 [27042] libc: [alpha] anonymous union in struct stat confuses
566 [27053] libc: Conformance regression in system(3) (and probably also
568 [27072] dynamic-link: static pie ifunc resolvers run before hwcap is
570 [27077] network: Do not reload /etc/nsswitch.conf from chroot
571 [27083] libc: Unsafe unbounded alloca in addmntent
572 [27104] dynamic-link: The COMMON_CPUID_INDEX_MAX handshake does not
574 [27130] string: "rep movsb" performance issue
575 [27150] libc: alpha: wait4() is unavailable in static linking
576 [27177] dynamic-link:
577 GLIBC_TUNABLES=glibc.cpu.x86_ibt=on:glibc.cpu.x86_shstk=on doesn't
579 [27222] dynamic-link: Incorrect sysdeps/x86/tst-cpu-features-cpuinfo.c
580 [27237] malloc: deadlock in malloc/tst-malloc-stats-cancellation
581 [27256] locale: Assertion failure in ISO-2022-JP-3 gconv module
582 related to combining characters (CVE-2021-3326)
589 * Unicode 13.0.0 Support: Character encoding, character type info, and
590 transliteration tables are all updated to Unicode 13.0.0, using
591 generator scripts contributed by Mike FABIAN (Red Hat).
593 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
595 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
596 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
597 Three ABIs are supported:
603 The arc* ABIs are little-endian while arceb is big-endian. All ABIs use
604 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
606 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
607 DT_DEPAUDIT dynamic section entries of the main executable.
609 * powerpc64le supports IEEE128 long double libm/libc redirects when
610 using -mabi=ieeelongdouble to compile C code on supported GCC
611 toolchains. It is recommended to use GCC 8 or newer when testing
614 * To help detect buffer overflows and other out-of-bounds accesses
615 several APIs have been annotated with GCC 'access' attribute. This
616 should help GCC 10 issue better warnings.
618 * On Linux, functions pthread_attr_setsigmask_np and
619 pthread_attr_getsigmask_np have been added. They allow applications
620 to specify the signal mask of a thread created with pthread_create.
622 * The GNU C Library now provides the header file <sys/single_threaded.h>
623 which declares the variable __libc_single_threaded. Applications are
624 encouraged to use this variable for single-thread optimizations,
625 instead of weak references to symbols historically defined in
628 * The functions sigabbrev_np and sigdescr_np have been added. The
629 sigabbrev_np function returns the abbreviated signal name (e.g. "HUP" for
630 SIGHUP) while sigdescr_np returns a string describing the signal number
631 (e.g "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
632 attempt to translate the return description, both functions return
633 NULL for an invalid signal number.
635 They should be used instead of sys_siglist or sys_sigabbrev and they
636 are both thread and async-signal safe. These functions are GNU extensions.
638 * The functions strerrorname_np and strerrordesc_np have been added. The
639 strerroname_np function returns error number name (e.g. "EINVAL" for EINVAL)
640 while strerrordesc_np returns a string describing the error number
641 (e.g "Invalid argument" for EINVAL). Different than strerror,
642 strerrordesc_np does not attempt to translate the return description, both
643 functions return NULL for an invalid error number.
645 They should be used instead of sys_errlist and sys_nerr, both are
646 thread and async-signal safe. These functions are GNU extensions.
648 * AArch64 now supports standard branch protection security hardening
649 in glibc when it is built with a GCC that is configured with
650 --enable-standard-branch-protection (or if -mbranch-protection=standard
651 flag is passed when building both GCC target libraries and glibc,
652 in either case a custom GCC is needed). This includes branch target
653 identification (BTI) and pointer authentication for return addresses
654 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
655 extensions respectively for the protection to be effective,
656 otherwise the used instructions are nops. User code can use PAC-RET
657 without libc support, but BTI requires a libc that is built with BTI
658 support, otherwise runtime objects linked into user code will not be
661 Deprecated and removed features, and other changes affecting compatibility:
663 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
664 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
665 RPC header files. Backward compatibility for old programs is kept
666 only for architectures and ABIs that have been added in or before
667 glibc 2.31. New programs need to use TI-RPC
668 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
669 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
671 * Remove configure option --enable-obsolete-nsl. libnsl is only built
672 as shared library for backward compatibility and the NSS modules "nis"
673 and "nisplus" are not built at all and libnsl's headers aren't
674 installed. This compatibility is kept only for architectures and ABIs
675 that have been added in or before version 2.28. Replacement
676 implementations based on TI-RPC, which additionally support IPv6, are
677 available from <https://github.com/thkukuk/>. This change does not
678 affect the "compat" NSS module, which does not depend on libnsl
679 since 2.27 and thus can be used without NIS.
681 * The deprecated <sys/sysctl.h> header and the sysctl function have been
682 removed. To support old binaries, the sysctl function continues to
683 exist as a compatibility symbol (on those architectures which had it),
684 but always fails with ENOSYS. This reflects the removal of the system
685 call from all architectures, starting with Linux 5.5.
687 * The sstk function is no longer available to newly linked binaries.
688 Its implementation always returned with a failure, and the function
689 was not declared in any header file.
691 * The legacy signal handling functions siginterrupt, sigpause, sighold,
692 sigrelse, sigignore and sigset, and the sigmask macro have been
693 deprecated. Applications should use the sigsuspend, sigprocmask and
694 sigaction functions instead.
696 * ldconfig now defaults to the new format for ld.so.cache. glibc has
697 already supported this format for almost 20 years.
699 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
700 are no longer available to newly linked binaries, and their declarations
701 have been removed from <string.h>. They are exported solely as
702 compatibility symbols to support old binaries. All programs should use
705 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
706 are no longer available to newly linked binaries, and their declarations
707 have been removed from <stdio.h>. They are exported solely as
708 compatibility symbols to support old binaries. All programs should use
709 strerror or strerror_r instead.
711 * Both strerror and strerror_l now share the same internal buffer in the
712 calling thread, meaning that the returned string pointer may be invalided
713 or contents might be overwritten on subsequent calls in the same thread or
714 if the thread is terminated. It makes strerror MT-safe.
716 * Using weak references to libpthread functions such as pthread_create
717 or pthread_key_create to detect the singled-threaded nature of a
718 program is an obsolescent feature. Future versions of glibc will
719 define pthread_create within libc.so.6 itself, so such checks will
720 always flag the program as multi-threaded. Applications should check
721 the __libc_single_threaded variable declared in
722 <sys/single_threaded.h> instead.
724 * The "files" NSS module no longer supports the "key" database (used for
725 secure RPC). The contents of the /etc/publickey file will be ignored,
726 regardless of the settings in /etc/nsswitch.conf. (This method of
727 storing RPC keys only supported the obsolete and insecure AUTH_DES
728 flavor of secure RPC.)
730 * The __morecore and __after_morecore_hook malloc hooks and the default
731 implementation __default_morecore have been deprecated. Applications
732 should use malloc interposition to change malloc behavior, and mmap to
733 allocate anonymous memory. A future version of glibc may require that
734 applications which use the malloc hooks must preload a special shared
735 object, to enable the hooks.
737 * The hesiod NSS module has been deprecated and will be removed in a
738 future version of glibc. System administrators are encouraged to
739 switch to other approaches for networked account databases, such as
742 Changes to build and runtime requirements:
744 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
745 long double redirects.
747 Security related changes:
749 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
750 invoked with the -c option and when processing invalid multi-byte input
751 sequences. Reported by Jan Engelhardt.
753 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
754 corruption when they were passed a pseudo-zero argument. Reported by Guido
755 Vranken / ForAllSecure Mayhem.
757 CVE-2020-1752: A use-after-free vulnerability in the glob function when
758 expanding ~user has been fixed.
760 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
761 memmove functions has been fixed. Discovered by Jason Royes and Samual
762 Dytrych of the Cisco Security Assessment and Penetration Team (See
765 The following bugs are resolved with this release:
767 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
768 [10441] manual: Backtraces code example lacks error checking
769 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
770 timer_sigev_thread dangerous
771 [14231] stdio: stdio-common tests memory requirements
772 [14578] libc: /proc-based emulation for lchmod, fchmodat
773 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
774 filtee has constructor
775 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
776 sequences (CVE-2016-10228)
777 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
778 character entities for infinity & pi
779 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
780 segfaults in applications
781 [20543] libc: Please move from .gnu.linkonce to comdat
782 [22489] network: gcc warns about implicit convertion in
783 ICMP6_FILTER_SETPASS with -Wsign-conversion
784 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
785 [23294] math: Complex _FloatN functions are redirected to the wrong
786 function with -mlong-double-64
787 [23296] libc: Data race in setting function descriptor during lazy
789 [23668] dynamic-link: ldconfig: Default to the new format for
791 [23819] hurd: hurd: Add C11 thread support
792 [23990] build: test-container error out on failure to exec child.
793 [23991] build: shell-container typo in run_command_array
794 [24638] manual: Error in example of parsing a template string
795 [24654] manual: Wrong declaration of wcschr in libc manual
796 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
798 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
799 dynamically loaded dsos
800 [25098] nptl: nptl: ctype classification functions are not AS-Safe
801 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
803 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
804 restore EAX, ECX and EDX
805 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
806 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
807 [25420] network: Race condition in resolv_conf.c can result in caching
808 stale configuration forever
809 [25487] math: sinl() stack corruption from crafted input
811 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
813 [25523] libc: MIPS/Linux inline syscall template is miscompiled
814 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
816 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
817 on 32 bit and old kernel
818 [25635] libc: arm: Wrong sysdep order selection for soft-fp
819 [25639] localedata: Some names of days and months wrongly spelt in
821 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
822 amount of sigset_t bytes
823 [25691] stdio: printf: memory leak when printing long multibyte
825 [25715] libc: system() returns wrong errors when posix_spawn fails
826 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
827 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
828 state for conversions that produce two Unicode code points
829 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
830 for linux x86_64 leads to livelock
831 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
832 test failures, invalid instruction in ld.so
833 [25790] glob: Typo in tst-fnmatch.input
834 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
836 [25819] localedata: Update locale data to Unicode 13.0.0
837 [25824] libc: Abnormal function of strnlen in aarch64
838 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
839 [25896] libc: Incorrect prctl
840 [25902] libc: Bad LOADARGS_N
841 [25905] dynamic-link: VSX registers are corrupted during PLT
842 resolution when glibc is built with --disable-multi-arch and --with-
844 [25933] string: Off by one error in __strncmp_avx2 when
845 length=VEC_SIZE*4 and strings are at page boundaries can cause a
847 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
848 exiting detached thread
849 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
851 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
853 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
854 [26073] math: getpayload() has wrong return value
855 [26076] dynamic-link: dlmopen crashes after failing to load
856 dependencies in audit mode
857 [26120] localedata: column width of of some Korean
858 JUNGSEONG/JONGSEONG characters wrong (should be 0)
859 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
860 [26133] libc: Incorrect need_arch_feature_F16C
861 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
863 [26149] libc: PKU is usable only if OSPKE is set
864 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
866 [26208] libc: Incorrect bit_cpu_CLFSH
867 [26210] network: Incorrect use of hidden symbols for global sunrpc
869 [26211] stdio: printf integer overflow calculating allocation size
870 [26214] stdio: printf_fp double free
871 [26215] stdio: printf_fp memory leak
872 [26232] time: FAIL: support/tst-timespec for 32-bit targets
873 [26258] nss: nss_compat should not read input files with mmap
874 [26332] string: Incorrect cache line size load causes memory
882 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
883 enable features from the draft ISO C2X standard. Only some features from
884 this draft standard are supported by the GNU C Library, and as the draft
885 is under active development, the set of features enabled by this macro is
886 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
887 by compiling with "gcc -std=gnu2x".
889 * The <math.h> functions that round their results to a narrower type now
890 have corresponding type-generic macros in <tgmath.h>, as defined in TS
891 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
892 Clarification Request 13 to TS 18661-3.
894 * The function pthread_clockjoin_np has been added, enabling join with a
895 terminated thread with a specific clock. It allows waiting against
896 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
898 * New locale added: mnw_MM (Mon language spoken in Myanmar).
900 * The DNS stub resolver will optionally send the AD (authenticated data) bit
901 in queries if the trust-ad option is set via the options directive in
902 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
903 mode, the AD bit, as provided by the name server, is available to
904 applications which call res_search and related functions. In the default
905 mode, the AD bit is not set in queries, and it is automatically cleared in
906 responses, indicating a lack of DNSSEC validation. (Therefore, the name
907 servers and the network path to them are treated as untrusted.)
909 Deprecated and removed features, and other changes affecting compatibility:
911 * The totalorder and totalordermag functions, and the corresponding
912 functions for other floating-point types, now take pointer arguments to
913 avoid signaling NaNs possibly being converted to quiet NaNs in argument
914 passing. This is in accordance with the resolution of Clarification
915 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
916 floating-point arguments directly will continue to work.
918 * The obsolete function stime is no longer available to newly linked
919 binaries, and its declaration has been removed from <time.h>.
920 Programs that set the system time should use clock_settime instead.
922 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
923 in a future version of glibc. In this release, the header still exists
924 but calling ftime will cause a compiler warning. All programs should use
925 gettimeofday or clock_gettime instead.
927 * The gettimeofday function no longer reports information about a
928 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
929 many years, as it cannot handle the full complexity of the world's
930 timezones, but hitherto we have supported it on a best-effort basis.
931 Changes required to support 64-bit time_t on 32-bit architectures have
932 made this no longer practical.
934 As of this release, callers of gettimeofday with a non-null 'tzp' argument
935 should expect to receive a 'struct timezone' whose tz_minuteswest and
936 tz_dsttime fields are zero. (For efficiency reasons, this does not always
937 happen on a few Linux-based ports. This will be corrected in a future
940 All callers should supply a null pointer for the 'tzp' argument to
941 gettimeofday. For accurate information about the time zone associated
942 with the current time, use the localtime function.
944 gettimeofday itself is obsolescent according to POSIX. We have no plans
945 to remove access to this function, but portable programs should consider
946 using clock_gettime instead.
948 * The settimeofday function can still be used to set a system-wide time
949 zone when the operating system supports it. This is because the Linux
950 kernel reused the API, on some architectures, to describe a system-wide
951 time-zone-like offset between the software clock maintained by the kernel,
952 and the "RTC" clock that keeps time when the system is shut down.
954 However, to reduce the odds of this offset being set by accident,
955 settimeofday can no longer be used to set the time and the offset
956 simultaneously. If both of its two arguments are non-null, the call
957 will fail (setting errno to EINVAL).
959 Callers attempting to set this offset should also be prepared for the call
960 to fail and set errno to ENOSYS; this already happens on the Hurd and on
961 some Linux architectures. The Linux kernel maintainers are discussing a
962 more principled replacement for the reused API. After a replacement
963 becomes available, we will change settimeofday to fail with ENOSYS on all
964 platforms when its 'tzp' argument is not a null pointer.
966 settimeofday itself is obsolescent according to POSIX. Programs that set
967 the system time should use clock_settime and/or the adjtime family of
968 functions instead. We may cease to make settimeofday available to newly
969 linked binaries after there is a replacement for Linux's time-zone-like
972 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
973 the optional CAS instruction is implemented (for instance, LEON processors
974 are still supported, but SuperSPARC processors are not).
976 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
979 * If a lazy binding failure happens during dlopen, during the execution of
980 an ELF constructor, the process is now terminated. Previously, the
981 dynamic loader would return NULL from dlopen, with the lazy binding error
982 captured in a dlerror message. In general, this is unsafe because
983 resetting the stack in an arbitrary function call is not possible.
985 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
986 executable stack unless explicitly configured at build time to require
987 minimum kernel version 4.8 or newer. This is because executing
988 floating-point branches on a non-executable stack on Linux kernels prior to
989 4.8 can lead to application crashes for some MIPS configurations. While
990 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
991 expected to enable non-executable stack by default with PT_GNU_STACK by
992 default and is thus likely to trigger a crash on older kernels.
994 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
995 non-executable stack while dropping support for older kernels.
997 * System call wrappers for time system calls now use the new time64 system
998 calls when available. On 32-bit targets, these wrappers attempt to call
999 the new system calls first and fall back to the older 32-bit time system
1000 calls if they are not present. This may cause issues in environments
1001 that cannot handle unsupported system calls gracefully by returning
1002 -ENOSYS. Seccomp sandboxes are affected by this issue.
1004 Changes to build and runtime requirements:
1006 * It is no longer necessary to have recent Linux kernel headers to build
1007 working (non-stub) system call wrappers on all architectures except 64-bit
1008 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
1010 * The ChangeLog file is no longer present in the toplevel directory of the
1011 source tree. ChangeLog files are located in the ChangeLog.old directory as
1012 ChangeLog.N where the highest N has the latest entries.
1014 Security related changes:
1016 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
1017 out-of-bounds write when executed in a signal frame context.
1019 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
1020 environment variable during program execution after a security
1021 transition, allowing local attackers to restrict the possible mapping
1022 addresses for loaded libraries and thus bypass ASLR for a setuid
1023 program. Reported by Marcin Kościelnicki.
1025 The following bugs are resolved with this release:
1027 [12031] localedata: iconv -t ascii//translit with Greek characters
1028 [15813] libc: Multiple issues in __gen_tempname
1029 [17726] libc: [arm, sparc] profil_counter should be compat symbol
1030 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
1031 [19767] libc: vdso is not used with static linking
1032 [19903] hurd: Shared mappings not being inherited by children processes
1033 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
1034 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
1036 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
1037 Symbols-A/B Unicode blocks
1038 [23518] libc: Eliminate __libc_utmp_jump_table
1039 [24026] malloc: malloc_info() returns wrong numbers
1040 [24054] localedata: Many locales are missing date_fmt
1041 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
1042 [24304] dynamic-link: Lazy binding failure during ELF
1043 constructors/destructors is not fatal
1044 [24376] libc: RISC-V symbol size confusion with _start
1045 [24682] localedata: zh_CN first weekday should be Monday per GB/T
1047 [24824] libc: test-in-container does not install charmap files compatible
1049 [24844] regex: regex bad pointer / leakage if malloc fails
1050 [24867] malloc: Unintended malloc_info formatting changes
1051 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
1052 [24880] libc: login: utmp implementation uses struct flock with fcntl64
1053 [24882] libc: login: pututline uses potentially outdated cache
1054 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
1055 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
1057 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
1059 [24930] dynamic-link: dlopen of PIE executable can result in
1060 _dl_allocate_tls_init assertion failure
1061 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
1062 (stringop-overflow error)
1063 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
1064 functions other can lead to crashes
1065 [24967] libc: jemalloc static linking causes runtime failure
1066 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
1068 [25035] libc: sbrk() failure handled poorly in tunables_strdup
1069 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
1070 [25097] libc: new -Warray-bounds with GCC 10
1071 [25112] dynamic-link: dlopen must not make new objects accessible when it
1072 still can fail with an error
1073 [25139] localedata: Please add the new mnw_MM locale
1074 [25149] regex: Array bounds violation in proceed_next_node
1075 [25157] dynamic-link: Audit cookie for the dynamic loader is not
1076 initialized correctly
1077 [25189] libc: glibc's __glibc_has_include causes issues with clang
1079 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
1080 value to an unsigned
1081 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
1082 binaries (CVE-2019-19126)
1083 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
1085 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
1087 [25232] string: <string.h> does not enable const correctness for strchr et
1089 [25233] localedata: Consider "." as the thousands separator for sl_SI
1091 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
1092 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
1093 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
1095 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
1096 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
1098 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
1099 (dl_initfirst) link map pointer
1100 [25401] malloc: pvalloc must not have __attribute_alloc_size__
1101 [25423] libc: Array overflow in backtrace on powerpc
1102 [25425] network: Missing call to __resolv_context_put in
1103 getaddrinfo.c:gethosts
1110 * Unicode 12.1.0 Support: Character encoding, character type info, and
1111 transliteration tables are all updated to Unicode 12.1.0, using
1112 generator scripts contributed by Mike FABIAN (Red Hat).
1114 * The dynamic linker accepts the --preload argument to preload shared
1115 objects, in addition to the LD_PRELOAD environment variable.
1117 * The twalk_r function has been added. It is similar to the existing
1118 twalk function, but it passes an additional caller-supplied argument
1119 to the callback function.
1121 * On Linux, the getdents64, gettid, and tgkill functions have been added.
1123 * Minguo (Republic of China) calendar support has been added as an
1124 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
1127 * The entry for the new Japanese era has been added for ja_JP locale.
1129 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
1130 pvalloc, memalign, and posix_memalign fail now with total object size
1131 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
1132 pointer subtraction within the allocated object, where results might
1133 overflow the ptrdiff_t type.
1135 * The dynamic linker no longer refuses to load objects which reference
1136 versioned symbols whose implementation has moved to a different soname
1137 since the object has been linked. The old error message, symbol
1138 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
1139 link time reference, is gone.
1141 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
1142 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
1143 functions. These behave similarly to their "timed" equivalents, but also
1144 accept a clockid_t parameter to determine which clock their timeout should
1145 be measured against. All functions allow waiting against CLOCK_MONOTONIC
1146 and CLOCK_REALTIME. The decision of which clock to be used is made at the
1147 time of the wait (unlike with pthread_condattr_setclock, which requires
1148 the clock choice at initialization time).
1150 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
1151 work, new resolvers can use a second argument which can be extended in
1152 the future, currently it contains the AT_HWCAP2 value.
1154 Deprecated and removed features, and other changes affecting compatibility:
1156 * The copy_file_range function fails with ENOSYS if the kernel does not
1157 support the system call of the same name. Previously, user space
1158 emulation was performed, but its behavior did not match the kernel
1159 behavior, which was deemed too confusing. Applications which use the
1160 copy_file_range function can no longer rely on glibc to provide a fallback
1161 on kernels that do not support the copy_file_range system call, and if
1162 this function returns ENOSYS, they will need to use their own fallback.
1163 Support for copy_file_range for most architectures was added in version
1164 4.5 of the mainline Linux kernel.
1166 * The functions clock_gettime, clock_getres, clock_settime,
1167 clock_getcpuclockid, clock_nanosleep were removed from the librt library
1168 for new applications (on architectures which had them). Instead, the
1169 definitions in libc will be used automatically, which have been available
1172 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
1173 and <sys/stropts.h> have been removed.
1175 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
1176 resolver flag (deprecated in glibc 2.25) have been removed.
1178 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
1179 resolver have been removed from <resolv.h>.
1181 * With --enable-bind-now, installed programs are now linked with the
1184 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
1185 configurations) has been removed, following the deprecation of this
1186 subarchitecture in version 8 of GCC, and its removal in version 9.
1188 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
1189 header have been removed.
1191 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
1192 deprecated and will be removed from a future version of glibc.
1193 Application should directly access /proc instead. For obtaining random
1194 bits, the getentropy function can be used.
1196 Changes to build and runtime requirements:
1198 * GCC 6.2 or later is required to build the GNU C Library.
1200 Older GCC versions and non-GNU compilers are still supported when
1201 compiling programs that use the GNU C Library.
1203 Security related changes:
1205 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
1206 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
1207 has undefined behavior. On x32, the size_t argument may be passed
1208 in the lower 32 bits of the 64-bit RDX register with non-zero upper
1209 32 bits. When it happened with the sign bit of RDX register set,
1210 memcmp gave the wrong result since it treated the size argument as
1211 zero. Reported by H.J. Lu.
1213 CVE-2019-9169: Attempted case-insensitive regular-expression match
1214 via proceed_next_node in posix/regexec.c leads to heap-based buffer
1215 over-read. Reported by Hongxu Chen.
1217 The following bugs are resolved with this release:
1219 [2872] locale: Transliteration Cyrillic -> ASCII fails
1220 [6399] libc: gettid() should have a wrapper
1221 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
1222 [16976] glob: fnmatch unbounded stack VLA for collating symbols
1223 [17396] localedata: globbing for locale by [[.collating-element.]]
1224 [18035] dynamic-link: pldd does no longer work, enters infinite loop
1225 [18465] malloc: memusagestat is built using system C library
1226 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
1227 invalid input drops valid char
1228 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
1229 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
1230 [21897] localedata: Afar locales: Fix mon, abmon, and abday
1231 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
1232 [23352] malloc: __malloc_check_init still defined in public header
1234 [23403] nptl: Wrong alignment of TLS variables
1235 [23501] libc: nftw() doesn't return dangling symlink's inode
1236 [23733] malloc: Check the count before calling tcache_get()
1237 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
1239 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
1240 [23844] nptl: pthread_rwlock_trywrlock results in hang
1241 [23983] argparse: Missing compat versions of argp_failure and argp_error
1242 for long double = double
1243 [23984] libc: Missing compat versions of err.h and error.h functions for
1244 long double = double
1245 [23996] localedata: Dutch salutations
1246 [24040] libc: riscv64: unterminated call chain in __thread_start
1247 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
1249 [24051] stdio: puts and putchar output to _IO_stdout instead of stdout
1250 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
1252 [24114] regex: regexec buffer read overrun in "grep -i
1253 '\(\(\)*.\)*\(\)\(\)\1'"
1254 [24122] libc: Segfaults if 0 returned from la_version
1255 [24153] stdio: Some input functions do not react to stdin assignment
1256 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
1257 RDX is set) (CVE-2019-7309)
1258 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
1259 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
1260 not the default "nor"
1261 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
1262 false positives, change to modern flexible array
1263 [24180] nptl: pthread_mutex_trylock does not use the correct order of
1264 instructions while maintaining the robust mutex list due to missing
1266 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
1267 unnecessary librt dependencies
1268 [24200] localedata: Revert first_weekday removal in en_IE locale
1269 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
1270 [24215] nptl: pthread_timedjoin_np should be a cancellation point
1271 [24216] malloc: Check for large bin list corruption when inserting
1273 [24228] stdio: old x86 applications that use legacy libio crash on exit
1274 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
1276 [24293] localedata: Missing Minguo calendar support for TW locales
1277 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
1278 tt_RU (Tatar) locale
1279 [24307] localedata: Update locale data to Unicode 12.0.0
1280 [24323] dynamic-link: dlopen should not be able open PIE objects
1281 [24335] build: "Obsolete types detected" with Linux 5.0 headers
1282 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
1283 tt_RU (Tatar) locale
1284 [24370] localedata: Add lang_name for tt_RU locale
1285 [24372] locale: Binary locale files are not architecture independent
1286 [24394] time: strptime %Ey mis-parses final year of era
1287 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
1289 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
1291 [24531] malloc: Malloc tunables give tcache assertion failures
1292 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
1294 [24535] localedata: Update locale data to Unicode 12.1.0
1295 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
1296 kernels and break testing
1297 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
1298 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
1299 [-Werror=format-overflow=]
1300 [24570] libc: alpha: compat msgctl uses __IPC_64
1301 [24584] locale: Data race in __wcsmbs_clone_conv
1302 [24588] stdio: Remove codecvt vtables from libio
1303 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
1305 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
1306 [24632] stdio: Old binaries which use freopen with default stdio handles
1308 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
1310 [24652] localedata: szl_PL spelling correction
1311 [24695] nss: nss_db: calling getpwent after endpwent crashes
1312 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
1313 in /etc/nsswitch.conf
1314 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
1315 [24740] libc: getdents64 type confusion
1316 [24741] dynamic-link: ld.so should not require that a versioned symbol is
1317 always implemented in the same library
1318 [24744] libc: Remove copy_file_range emulation
1319 [24757] malloc: memusagestat is linked against system libpthread
1320 [24794] libc: Partial test suite run builds corrupt test-in-container
1328 * The getcpu wrapper function has been added, which returns the currently
1329 used CPU and NUMA node. This function is Linux-specific.
1331 * A new convenience target has been added for distribution maintainers
1332 to build and install all locales as directories with files. The new
1333 target is run by issuing the following command in your build tree:
1334 'make localedata/install-locale-files', with an optional DESTDIR
1335 to set the install root if you wish to install into a non-default
1336 configured location.
1338 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
1340 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
1341 for _GNU_SOURCE, to match BSD environments.
1343 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
1344 indicates that it will abort the transaction prior to entering the kernel
1345 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
1346 suspended, and this caused some undefined side-effects issues by aborting
1347 transactions manually. Glibc avoided it by abort transactions manually on
1348 each syscall, but it lead to performance issues on newer kernels where the
1349 HTM state is saved and restore lazily (the state being saved even when the
1350 process actually does not use HTM).
1352 * The functions posix_spawn_file_actions_addchdir_np and
1353 posix_spawn_file_actions_addfchdir_np have been added, enabling
1354 posix_spawn and posix_spawnp to run the new process in a different
1355 directory. These functions are GNU extensions. The function
1356 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
1359 * The popen and system do not run atfork handlers anymore (BZ#17490).
1360 Although it is a possible POSIX violation, the POSIX rationale in
1361 pthread_atfork documentation regarding atfork handlers is to handle
1362 inconsistent mutex state after a fork call in a multi-threaded process.
1363 In both popen and system there is no direct access to user-defined mutexes.
1365 * Support for the C-SKY ABIV2 running on Linux has been added. This port
1366 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
1368 - C-SKY ABIV2 soft-float little-endian
1369 - C-SKY ABIV2 hard-float little-endian
1371 * strftime's default formatting of a locale's alternative year (%Ey)
1372 has been changed to zero-pad the year to a minimum of two digits,
1373 like "%y". This improves the display of Japanese era years during
1374 the first nine years of a new era, and is expected to be harmless
1375 for all other locales (only Japanese locales regularly have
1376 alternative year numbers less than 10). Zero-padding can be
1377 overridden with the '_' or '-' flags (which are GNU extensions).
1379 * As a GNU extension, the '_' and '-' flags can now be applied to
1380 "%EY" to control how the year number is formatted; they have the
1381 same effect that they would on "%Ey".
1383 Deprecated and removed features, and other changes affecting compatibility:
1385 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
1386 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
1388 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
1389 in <sys/procfs.h>, has been corrected to match the type actually used by
1390 the Linux kernel. This affects the size and layout of that structure on
1391 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
1393 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
1394 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
1395 defined in <sys/procfs.h>, has been corrected to match the type actually
1396 used by the Linux kernel. This affects the size and layout of those
1399 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
1400 meant to scan a string and allocate space for it with malloc, is now
1401 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
1402 defined. This extension conflicts with C99's use of '%a' to scan a
1403 hexadecimal floating-point number, which is now available to programs
1404 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
1406 POSIX.1-2008 includes the feature of allocating a buffer for string input
1407 with malloc, using the modifier letter 'm' instead. Programs using
1408 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
1409 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
1410 C99 '%a' no longer need to avoid _GNU_SOURCE.
1412 GCC's -Wformat warnings can detect most uses of this extension, as long
1413 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
1414 __attribute__ ((format (scanf, ...))).
1416 Changes to build and runtime requirements:
1418 * Python 3.4 or later is required to build the GNU C Library.
1420 * On most architectures, GCC 5 or later is required to build the GNU C
1421 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
1423 Older GCC versions and non-GNU compilers are still supported when
1424 compiling programs that use the GNU C Library.
1426 Security related changes:
1428 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
1429 denial of service due to resource exhaustion when processing getaddrinfo
1430 calls with crafted host names. Reported by Guido Vranken.
1432 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
1433 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
1434 happened, accessing the 32-bit size_t value as the full 64-bit register
1435 in the assembly string/memory functions would cause a buffer overflow.
1436 Reported by H.J. Lu.
1438 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
1439 addresses with arbitrary trailing characters, potentially leading to data
1440 or command injection issues in applications.
1442 The following bugs are resolved with this release:
1444 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
1445 [10496] localedata: 12h time representation in multiple locales faulty
1446 [10797] localedata: it_IT locale numeric does not have a separator for
1448 [11319] libc: dprintf doesn't handle errors properly
1449 [16346] time: mktime: potentially unsafe use of localtime_offset
1450 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
1452 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
1453 posix_spawn_file_actions_addfchdir_np
1454 [17426] localedata: Indian locales: set the correct date format
1455 [17490] stdio: popen should not invoke atfork handlers
1456 [17783] libc: TIOCSER_TEMT conditions inconsistent
1457 [18040] regex: use-after-free in regexec/get_subexp
1458 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
1459 [20018] network: getaddrinfo should reject IP addresses with trailing
1460 characters (CVE-2016-10739)
1461 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
1462 [20271] libc: Missing "\n" in __libc_fatal calls
1463 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
1464 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
1465 pointer argument is non-NULL
1466 [21037] stdio: open_memstream and freopen
1467 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
1468 [21716] time: Crash in glibc's mktime in low-memory situations
1469 [22834] stdio: Subprocess forked by popen may crash in Linux when
1470 multithreads call popen
1471 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
1472 and pthread_create fails.
1473 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
1474 [23125] libc: riscv64: endless loop when throwing an exception from a
1476 [23275] nptl: Race in pthread_mutex_lock while promoting to
1477 PTHREAD_MUTEX_ELISION_NP.
1478 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
1480 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
1482 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
1484 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
1485 [23509] dynamic-link: CET enabled glibc is incompatible with the older
1487 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
1488 [23521] nss: get_next_alias nss_files file stream leak
1489 [23538] nptl: Hang in pthread_cond_broadcast
1490 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
1491 [23578] regex: Invalid memory access if regex pattern contains NUL byte
1492 [23579] libc: Errors misreported in preadv2
1493 [23597] build: support/test-container.c doesn't work with different
1495 [23603] time: mktime signed integer overflow on large timestamps
1496 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
1497 [23614] libc: powerpc: missing CFI register information in __mpn_*
1499 [23637] string: Generic strstr/strcasestr fails with huge needles
1500 [23640] libc: no way to easily clear FD_CLOEXEC in
1501 posix_spawn_file_actions_adddup2()
1502 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
1504 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
1506 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
1507 [23689] libc: Bug in documentation for rusage.ru_ixrss in
1508 bits/types/struct_rusage.h
1509 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
1511 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
1513 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
1514 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
1515 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
1517 [23724] localedata: Albanian date formats are incorrect
1518 [23735] math: libnldbl_nonshared.a references internal libm symbols
1519 [23740] localedata: kl_GL: Month names and date formats need update
1520 [23744] regex: regex refactorings to remove BE, avoid duplication
1521 [23745] time: mktime fix for Gnulib + coreutils
1522 [23758] time: Improve the width of alternate representation for year in
1524 [23783] libc: [mips] Missing CMSPAR bits/termios.h
1525 [23789] time: mktime does not set errno on failure
1526 [23791] localedata: Wrong monetary format for ca_ES locale
1527 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
1528 [23794] locale: c16rtomb does not handle surrogate pairs
1529 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
1530 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
1531 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
1532 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
1533 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
1534 [23862] libc: [sh] missing kernel-features.h undefines
1535 [23864] libc: [riscv] missing kernel-features.h undefines
1536 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
1537 [23907] malloc: Incorrect double-free malloc tcache check disregards
1539 [23913] libc: off-by-one in function maybe_script_execute in
1540 sysdeps/posix/spawni.c
1541 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
1542 [23923] locale: Add --no-hard-links option to localedef
1543 [23927] network: Linux if_nametoindex() does not close descriptor
1545 [23961] math: powf can overflow to inf without setting errno in non-
1546 nearest rounding mode
1547 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
1548 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
1549 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
1550 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
1551 [24011] localedata: Fixed small type in comment for locale bs_BA
1552 [24018] libc: gettext() may return NULL
1553 [24022] build: riscv build failure with Linux kernel 4.20-rc7
1554 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
1555 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
1557 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
1558 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
1560 [24046] localedata: en_US locale doesn't define date_fmt
1561 [24063] manual: @var{errno} should be @code{errno}
1562 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
1563 [24088] libc: VSCR field is not being correctly read in ucontext_t on
1565 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
1567 [24097] string: Can't use 64-bit register for size_t in assembly codes for
1569 [24110] hurd: SS_DISABLE never set in stack_t value returned by
1571 [24112] network: Do not send DNS queries for non-host names (where all
1572 answers will be rejected)
1573 [24130] libc: alpha __remqu corrupts $f3 register
1580 * The localization data for ISO 14651 is updated to match the 2016
1581 Edition 4 release of the standard, this matches data provided by
1582 Unicode 9.0.0. This update introduces significant improvements to the
1583 collation of Unicode characters. This release deviates slightly from
1584 the standard in that the collation element ordering for lowercase and
1585 uppercase LATIN script characters is adjusted to ensure that regular
1586 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
1587 is not matched by [a-z]. With the update many locales have been
1588 updated to take advantage of the new collation information. The new
1589 collation information has increased the size of the compiled locale
1590 archive or binary locales.
1592 * The GNU C Library can now be compiled with support for Intel CET, AKA
1593 Intel Control-flow Enforcement Technology. When the library is built
1594 with --enable-cet, the resulting glibc is protected with indirect
1595 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
1596 compatible with all existing executables and shared libraries. This
1597 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
1598 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
1599 capable of multi-byte NOPs, like x86-64 processors as well as Intel
1600 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
1601 x86_64 and x32 on non-CET processors. --enable-cet has been tested
1602 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
1605 * The GNU C Library now has correct support for ABSOLUTE symbols
1606 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
1607 relocated incorrectly or in some cases discarded. The GNU linker can
1608 make use of the newer semantics, but it must communicate it to the
1609 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
1610 field) to indicate such support is required.
1612 * Unicode 11.0.0 Support: Character encoding, character type info, and
1613 transliteration tables are all updated to Unicode 11.0.0, using
1614 generator scripts contributed by Mike FABIAN (Red Hat).
1616 * <math.h> functions that round their results to a narrower type are added
1617 from TS 18661-1:2014 and TS 18661-3:2015:
1619 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
1620 fMxaddfNx functions.
1622 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
1623 fMxsubfNx functions.
1625 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
1626 fMxmulfNx functions.
1628 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
1629 fMxdivfNx functions.
1631 * Two grammatical forms of month names are now supported for the following
1632 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
1633 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
1634 support two grammatical forms in abbreviated month names: Catalan, Greek,
1637 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
1638 include the support for two grammatical forms of month names.
1640 * Building and running on GNU/Hurd systems now works without out-of-tree
1643 * The renameat2 function has been added, a variant of the renameat function
1644 which has a flags argument. If the flags are zero, the renameat2 function
1645 acts like renameat. If the flag is not zero and there is no kernel
1646 support for renameat2, the function will fail with an errno value of
1647 EINVAL. This is different from the existing gnulib function renameatu,
1648 which performs a plain rename operation in case of a RENAME_NOREPLACE
1649 flags and a non-existing destination (and therefore has a race condition
1650 that can clobber the destination inadvertently).
1652 * The statx function has been added, a variant of the fstatat64
1653 function with an additional flags argument. If there is no direct
1654 kernel support for statx, glibc provides basic stat support based on
1655 the fstatat64 function.
1657 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
1658 library if installed. libidn2 version 2.0.5 or later is recommended. If
1659 libidn2 is not available, internationalized domain names are not encoded
1660 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
1661 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
1662 with an encoding error.) Flags which used to change the IDN encoding and
1663 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
1664 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
1665 deprecated. They no longer have any effect.
1667 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
1668 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
1669 range of ELF gABI expressions including such constructs as
1670 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
1671 have been further restricted, and where in the past a dynamic string
1672 token sequence may have been interpreted as a literal string it will
1673 now cause a load failure. These load failures were always considered
1674 unspecified behaviour from the perspective of the dynamic loader, and
1675 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
1676 results in a load failure now.
1678 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
1679 implementation includes all the standard functions provided by
1682 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
1683 thrd_detach, thrd_exit, and thrd_join for thread management.
1685 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
1686 mtx_destroy for mutual exclusion.
1688 - call_once for function call synchronization.
1690 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
1691 cnd_wait for conditional variables.
1693 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
1695 Application developers must link against libpthread to use ISO C threads.
1697 Deprecated and removed features, and other changes affecting compatibility:
1699 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
1700 installed. Software that was using either header should be updated to
1701 use standard <stdio.h> interfaces instead.
1703 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
1704 This was never required by the C standard, and the macros just expanded
1705 to call alternative names for the same functions. If you hoped getc and
1706 putc would provide performance improvements over fgetc and fputc, instead
1707 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
1708 necessary, flockfile and funlockfile.
1710 * All stdio functions now treat end-of-file as a sticky condition. If you
1711 read from a file until EOF, and then the file is enlarged by another
1712 process, you must call clearerr or another function with the same effect
1713 (e.g. fseek, rewind) before you can read the additional data. This
1714 corrects a longstanding C99 conformance bug. It is most likely to affect
1715 programs that use stdio to read interactive input from a terminal.
1718 * The macros 'major', 'minor', and 'makedev' are now only available from
1719 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
1720 headers that happen to include <sys/types.h>. These macros are rarely
1721 used, not part of POSIX nor XSI, and their names frequently collide with
1722 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
1723 further explanation.
1725 <sys/sysmacros.h> is a GNU extension. Portable programs that require
1726 these macros should first include <sys/types.h>, and then include
1727 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
1729 * The tilegx*-*-linux-gnu configurations are no longer supported.
1731 * The obsolete function ustat is no longer available to newly linked
1732 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
1733 function has been deprecated in favor of fstatfs and statfs.
1735 * The obsolete function nfsservctl is no longer available to newly linked
1736 binaries. This function was specific to systems using the Linux kernel
1737 and could not usefully be used with the GNU C Library on systems with
1738 version 3.1 or later of the Linux kernel.
1740 * The obsolete function name llseek is no longer available to newly linked
1741 binaries. This function was specific to systems using the Linux kernel
1742 and was not declared in a header. Programs should use the lseek64 name
1743 for this function instead.
1745 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
1746 getaddrinfo and getnameinfo functions have been deprecated. The behavior
1747 previously selected by them is now always enabled.
1749 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
1750 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
1751 restriction (rejecting '_' in host names, among other things) has been
1752 removed, for increased compatibility with non-IDN name resolution.
1754 * The fcntl function now have a Long File Support variant named fcntl64. It
1755 is added to fix some Linux Open File Description (OFD) locks usage on non
1756 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
1757 fcntl and LFS support is handled transparently. Also for Linux, the OFD
1758 locks act as a cancellation entrypoint.
1760 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
1761 ecb_crypt, and des_setparity are no longer available to newly linked
1762 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
1763 longer installed. These functions encrypted and decrypted data with the
1764 DES block cipher, which is no longer considered secure. Software that
1765 still uses these functions should switch to a modern cryptography library,
1768 * Reflecting the removal of the encrypt and setkey functions above, the
1769 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
1770 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1773 * The obsolete function fcrypt is no longer available to newly linked
1774 binaries. It was just another name for the standard function crypt,
1775 and it has not appeared in any header file in many years.
1777 * We have tentative plans to hand off maintenance of the passphrase-hashing
1778 library, libcrypt, to a separate development project that will, we hope,
1779 keep up better with new passphrase-hashing algorithms. We will continue
1780 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1781 'crypt_r' should not need to change at all; however, distributions will
1782 need to install <crypt.h> and libcrypt from a separate project.
1784 In this release, if the configure option --disable-crypt is used, glibc
1785 will not install <crypt.h> or libcrypt, making room for the separate
1786 project's versions of these files. The plan is to make this the default
1787 behavior in a future release.
1789 Changes to build and runtime requirements:
1791 GNU make 4.0 or later is now required to build glibc.
1793 Security related changes:
1795 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1796 been fixed by removing the glibc-internal IDNA implementation and using
1797 the system-provided libidn2 library instead. Originally reported by Hanno
1798 Böck and Christian Weisgerber.
1800 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1801 architecture could corrupt memory. Reported by Max Horn.
1803 CVE-2018-11236: Very long pathname arguments to realpath function could
1804 result in an integer overflow and buffer overflow. Reported by Alexey
1807 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1808 architecture could write beyond the target buffer, resulting in a buffer
1809 overflow. Reported by Andreas Schwab.
1811 The following bugs are resolved with this release:
1813 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1814 [6889] manual: 'PWD' mentioned but not specified
1815 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1816 when __WORDSIZE != 64
1817 [13762] regex: re_search etc. should return -2 on memory exhaustion
1818 [13888] build: /tmp usage during testing
1819 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1820 [14092] nptl: Support C11 threads
1821 [14095] localedata: Review / update collation data from Unicode / ISO
1823 [14508] libc: -Wformat warnings
1824 [14553] libc: Namespace pollution loff_t in sys/types.h
1825 [14890] libc: Make NT_PRFPREG canonical.
1826 [15105] libc: Extra PLT references with -Os
1827 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1829 [16335] manual: Feature test macro documentation incomplete and out of
1831 [16552] libc: Unify umount implementations in terms of umount2
1832 [17082] libc: htons et al.: statement-expressions prevent use on global
1833 scope with -O1 and higher
1834 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1835 [17438] localedata: pt_BR: wrong d_fmt delimiter
1836 [17662] libc: please implement binding for the new renameat2 syscall
1837 [17721] libc: __restrict defined as /* Ignore */ even in c11
1838 [17979] libc: inconsistency between uchar.h and stdint.h
1839 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1840 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1841 horrible machine code)
1842 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1844 [18471] libc: llseek should be a compat symbol
1845 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1847 [18991] nss: nss_files skips large entry in database
1848 [19239] libc: Including stdlib.h ends up with macros major and minor being
1850 [19463] libc: linknamespace failures when compiled with -Os
1851 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1852 [19527] locale: Normalized charset name not recognized by setlocale
1853 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1854 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1856 [19728] network: out of bounds stack read in libidn function
1857 idna_to_ascii_4i (CVE-2016-6261)
1858 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1859 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1860 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1862 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1863 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1864 [20419] dynamic-link: files with large allocated notes crash in
1866 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1867 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1868 [20980] manual: CFLAGS environment variable replaces vital options
1869 [21163] regex: Assertion failure in pop_fail_stack when executing a
1870 malformed regexp (CVE-2015-8985)
1871 [21234] manual: use of CFLAGS makes glibc detect no optimization
1872 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1873 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1874 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1875 [21508] locale: intl/tst-gettext failure with latest msgfmt
1876 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1877 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1878 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1880 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1882 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1883 [22247] network: Integer overflow in the decode_digit function in
1884 puny_decode.c in libidn (CVE-2017-14062)
1885 [22342] nscd: NSCD not properly caching netgroup
1886 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1887 [22550] localedata: es_ES locale (and other es_* locales): collation
1888 should treat ñ as a primary different character, sync the collation
1889 for Spanish with CLDR
1890 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1891 by gcc configured with --enable-default-pie
1892 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1893 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1894 crossing 2GB threshold (CVE-2017-18269)
1895 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1897 [22735] time: Misleading typo in time.h source comment regarding
1899 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1900 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1901 `__assert_perror_fail ()' to `__assert_fail_base ()'
1902 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1904 [22786] libc: Stack buffer overflow in realpath() if input size is close
1905 to SSIZE_MAX (CVE-2018-11236)
1906 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1907 through an absolute DT_NEEDED path
1908 [22792] build: tcb-offsets.h dependency dropped
1909 [22797] libc: pkey_get() uses non-reserved name of argument
1910 [22807] libc: PTRACE_* constants missing for powerpc
1911 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1912 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1913 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1914 [22848] localedata: ca_ES: update date definitions from CLDR
1915 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1916 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1917 [22896] localedata: Update locale data for an_ES
1918 [22902] math: float128 test failures with GCC 8
1919 [22918] libc: multiple common of `__nss_shadow_database'
1920 [22919] libc: sparc32: backtrace yields infinite backtrace with
1922 [22926] libc: FTBFS on powerpcspe
1923 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1925 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1926 [22947] libc: FAIL: misc/tst-preadvwritev2
1927 [22963] localedata: cs_CZ: Add alternative month names
1928 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1929 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1930 [22998] dynamic-link: execstack tests are disabled when SELinux is
1932 [23005] network: Crash in __res_context_send after memory allocation
1934 [23007] math: strtod cannot handle -nan
1935 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1936 [23036] regex: regex equivalence class regression
1937 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1938 [23069] libc: sigaction broken on riscv64-linux-gnu
1939 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1940 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1941 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1942 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1943 and libc build with -Os)
1944 [23140] localedata: More languages need two forms of month names
1945 [23145] libc: _init/_fini aren't marked as hidden
1946 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1947 [23171] math: C++ iseqsig for long double converts arguments to double
1948 [23178] nscd: sudo will fail when it is run in concurrent with commands
1949 that changes /etc/passwd
1950 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1952 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1953 [23208] localedata: New locale - Lower Sorbian (dsb)
1954 [23233] regex: Memory leak in build_charclass_op function in file
1956 [23236] stdio: Harden function pointers in _IO_str_fields
1957 [23250] nptl: Offset of __private_ss differs from GCC
1958 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1959 -mtune=generic -mfpmath=sse
1960 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1962 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1963 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1965 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1966 [23277] math: nan function should not have const attribute
1967 [23279] math: scanf and strtod wrong for some hex floating-point
1968 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1970 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1971 [23303] build: undefined reference to symbol
1972 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1973 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1975 [23313] stdio: libio vtables validation and standard file object
1977 [23329] libc: The __libc_freeres infrastructure is not properly run across
1979 [23349] libc: Various glibc headers no longer compatible with
1981 [23351] malloc: Remove unused code related to heap dumps and malloc
1983 [23363] stdio: stdio-common/tst-printf.c has non-free license
1984 [23396] regex: Regex equivalence regression in single-byte locales
1985 [23422] localedata: oc_FR: More updates of locale data
1986 [23442] build: New warning with GCC 8
1987 [23448] libc: Out of bounds access in IBM-1390 converter
1988 [23456] libc: Wrong index_cpu_LZCNT
1989 [23458] build: tst-get-cpu-features-static isn't added to tests
1990 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1992 [23467] dynamic-link: x86/CET: A property note parser bug
1999 * The GNU C Library can now be compiled with support for building static
2000 PIE executables (See --enable-static-pie in INSTALL). These static PIE
2001 executables are like static executables but can be loaded at any address
2002 and provide additional security hardening benefits at the cost of some
2003 memory and performance. When the library is built with --enable-static-pie
2004 the resulting libc.a is usable with GCC 8 and above to create static PIE
2005 executables using the GCC option '-static-pie'. This feature is currently
2006 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
2007 aarch64 with binutils 2.30 or later.
2009 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
2010 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
2013 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
2015 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
2017 * In order to support faster and safer process termination the malloc API
2018 family of functions will no longer print a failure address and stack
2019 backtrace after detecting heap corruption. The goal is to minimize the
2020 amount of work done after corruption is detected and to avoid potential
2021 security issues in continued process execution. Reducing shutdown time
2022 leads to lower overall process restart latency, so there is benefit both
2023 from a security and performance perspective.
2025 * The abort function terminates the process immediately, without flushing
2026 stdio streams. Previous glibc versions used to flush streams, resulting
2027 in deadlocks and further data corruption. This change also affects
2028 process aborts as the result of assertion failures.
2030 * On platforms where long double has the IEEE binary128 format (aarch64,
2031 alpha, mips64, riscv, s390 and sparc), the math library now implements
2032 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
2033 These are the same interfaces added in version 2.26 for some platforms where
2034 this format is supported but is not the format of long double.
2036 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
2037 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
2038 implements interfaces for that type, as defined by ISO/IEC TS
2039 18661-3:2015. These are corresponding interfaces to those supported for
2042 * The math library now implements interfaces for the _Float32, _Float64 and
2043 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
2044 corresponding interfaces to those supported for _Float128.
2046 * glibc now implements the memfd_create and mlock2 functions on Linux.
2048 * Support for memory protection keys was added. The <sys/mman.h> header now
2049 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
2052 * The copy_file_range function was added.
2054 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
2056 * The ldconfig utility now processes `include' directives using the C/POSIX
2057 collation ordering. Previous glibc versions used locale-specific
2058 ordering, the change might break systems that relied on that.
2060 * Support for two grammatical forms of month names has been added.
2061 In a call to strftime, the "%B" and "%b" format specifiers will now
2062 produce the grammatical form required when the month is used as part
2063 of a complete date. New "%OB" and "%Ob" specifiers produce the form
2064 required when the month is named by itself. For instance, in Greek
2065 and in many Slavic and Baltic languages, "%B" will produce the month
2066 in genitive case, and "%OB" will produce the month in nominative case.
2068 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
2069 are all valid and will all accept any known form of month
2070 name---standalone or complete, abbreviated or full. In a call to
2071 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
2072 the strings used by "%B" and "%b", respectively. New query
2073 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
2074 used by "%OB" and "%Ob", respectively.
2076 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
2077 define the strings for %OB and %Ob, respectively; these have the
2078 same syntax as "mon" and "abmon". These arrays are optional; if they
2079 are not provided then they have the same content as "mon" and "abmon",
2082 These features are provided for locales which define "alt_mon" and/or
2083 "ab_alt_mon" in their locale source data. This release includes such
2084 alternative month name data for the following languages: Belarusian,
2085 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
2087 This feature is currently a GNU extension, but it is expected to
2088 be added to the next revision of POSIX, and it is also already
2089 available on some BSD-derived operating systems.
2091 This feature will cause existing statically compiled applications
2092 to fail to load locales and fall back to the builtin C/POSIX locales.
2093 See notes below for other changes affecting compatibility.
2095 * Support for the RISC-V ISA running on Linux has been added. This port
2096 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
2097 for the following ISA and ABI pairs:
2103 Deprecated and removed features, and other changes affecting compatibility:
2105 * Statically compiled applications attempting to load locales compiled for the
2106 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
2107 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
2108 support for two grammatical forms of the month names, also extends the locale
2109 data binary format. Static applications needing locale support must be
2110 recompiled to match the runtime and data they are deployed with. In some
2111 distributions there is an upgrade window where dynamically linked applications
2112 may use a new library but the old locale data and also fall back to the
2113 builtin C/POSIX locales; restarting the application process is sufficient to
2116 * Support for statically linked applications which call dlopen is deprecated
2117 and will be removed in a future version of glibc. Applications which call
2118 dlopen need to be linked dynamically instead.
2120 * Support for old programs which use internal stdio data structures and
2121 functions is deprecated. This includes programs which use the C++ streams
2122 provided by libstdc++ in GCC 2.95. Programs which use the internal
2123 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
2124 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
2125 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
2126 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
2127 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
2128 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
2129 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
2130 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
2131 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
2132 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
2133 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
2134 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
2135 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
2136 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
2137 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
2138 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
2139 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
2140 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
2141 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
2142 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
2143 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
2144 future version of glibc. Unlike other symbol removals, these old
2145 applications will not be supported using compatibility symbols.
2147 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
2148 defined by <sys/ptrace.h>.
2150 * libm no longer supports SVID error handling (calling a user-provided
2151 matherr function on error) or the _LIB_VERSION variable to control error
2152 handling. (SVID error handling and the _LIB_VERSION variable still work
2153 for binaries linked against older versions of the GNU C Library.) The
2154 libieee.a library is no longer provided. math.h no longer defines struct
2155 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
2156 TLOSS, PLOSS and HUGE.
2158 * The libm functions pow10, pow10f and pow10l are no longer supported for
2159 new programs. Programs should use the standard names exp10, exp10f and
2160 exp10l for these functions instead.
2162 * The mcontext_t type is no longer the same as struct sigcontext. On
2163 platforms where it was previously the same, this changes the C++ name
2164 mangling for interfaces involving this type.
2166 * The add-ons mechanism for building additional packages at the same time as
2167 glibc has been removed. The --enable-add-ons configure option is now
2170 * The --without-fp configure option is now ignored. Whether hardware
2171 floating-point instructions are used is now configured based on whether
2172 the compiler used at configure time (without any options implied by a
2173 --with-cpu= configure option) uses such instructions.
2175 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
2176 the specified string can be parsed as a domain name.
2178 * In the malloc_info output, the <heap> element may contain another <aspace>
2179 element, "subheaps", which contains the number of sub-heaps.
2181 * The libresolv function p_secstodate is no longer supported for new
2184 * The tilepro-*-linux-gnu configuration is no longer supported.
2186 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
2187 and will be removed in a future release. Software that is still using
2188 either header should be updated to use standard <stdio.h> interfaces
2191 libio.h was originally the header for a set of supported GNU extensions,
2192 but they have not been maintained as such in many years, they are now
2193 standing in the way of improvements to stdio, and we don't think there are
2194 any remaining external users. _G_config.h was never intended for public
2195 use, but predates the bits convention.
2197 Changes to build and runtime requirements:
2199 * bison version 2.7 or later is required to generate code in the 'intl'
2202 Security related changes:
2204 CVE-2009-5064: The ldd script would sometimes run the program under
2205 examination directly, without preventing code execution through the
2206 dynamic linker. (The glibc project disputes that this is a security
2207 vulnerability; only trusted binaries must be examined using the ldd
2210 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
2211 suffered from a one-byte overflow during ~ operator processing (either
2212 on the stack or the heap, depending on the length of the user name).
2213 Reported by Tim Rühsen.
2215 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
2216 would sometimes fail to free memory allocated during ~ operator
2217 processing, leading to a memory leak and, potentially, to a denial
2220 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
2221 without GLOB_NOESCAPE, could write past the end of a buffer while
2222 unescaping user names. Reported by Tim Rühsen.
2224 CVE-2017-17426: The malloc function, when called with an object size near
2225 the value SIZE_MAX, would return a pointer to a buffer which is too small,
2226 instead of NULL. This was a regression introduced with the new malloc
2227 thread cache in glibc 2.26. Reported by Iain Buclaw.
2229 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
2230 to the allocation of too much memory. (This is not a security bug per se,
2231 it is mentioned here only because of the CVE assignment.) Reported by
2234 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
2235 of the number of search path components. (This is not a security
2236 vulnerability per se because no trust boundary is crossed if the fix for
2237 CVE-2017-1000366 has been applied, but it is mentioned here only because
2238 of the CVE assignment.) Reported by Qualys.
2240 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
2241 for AT_SECURE or SUID binaries could be used to load libraries from the
2244 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
2245 succeeds without returning an absolute path due to unexpected behaviour
2246 of the Linux kernel getcwd syscall. Reported by halfdog.
2248 CVE-2018-6485: The posix_memalign and memalign functions, when called with
2249 an object size near the value of SIZE_MAX, would return a pointer to a
2250 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
2252 CVE-2018-6551: The malloc function, when called with an object size near
2253 the value of SIZE_MAX, would return a pointer to a buffer which is too
2254 small, instead of NULL.
2256 The following bugs are resolved with this release:
2258 [866] glob: glob should match dangling symlinks
2259 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
2260 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
2262 [5997] math: Very slow execution of sinf function
2263 [10580] localedata: hr_HR: updated locale
2264 [10871] locale: 'mon' array should contain both nominative and genitive
2266 [12349] localedata: eu_ES: incorrect thousands separator
2267 [13605] localedata: shn_MM: new Shan locale
2268 [13805] localedata: ru_RU: currency should use ',' as radix point
2269 [13953] localedata: km_KH: locale update
2270 [13994] localedata: mjw_IN: new locale
2271 [14121] build: make writes .mo files in po directory
2272 [14333] libc: Fix the race between atexit() and exit()
2273 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
2274 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
2276 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
2277 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
2278 width Latin characters
2279 [15332] localedata: es_CU: locale update
2280 [15436] stdio: Don't close or flush stdio streams on abort
2281 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
2283 [16148] localedata: ca_ES: incorrect thousands separator
2284 [16750] dynamic-link: ldd should not try to execute the binaries
2286 [16777] localedata: pl_PL: incorrect thousands separator in locale
2287 [16905] localedata: hanzi: new collation
2288 [17563] localedata: cmn_TW: add hanzi collation
2289 [17750] localedata: wrong collation order of diacritics in most locales
2290 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
2292 [17956] build: Build fails on missing definitions from header file
2293 nss/nss.h when Mozilla NSS is used for cryptography
2294 [18203] libc: realpath() does not handle unreachable paths correctly
2295 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
2296 [18812] localedata: kab_DZ: new Kabyle Algeria locale
2297 [18822] libc: Internal functions are called via PLT
2298 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
2299 [19170] libc: __gmon_start__ defined in hppa in crtn.S
2300 [19574] libc: glibc should support building static PIE binaries
2301 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
2303 [19971] glob: glob: Do not skip entries with zero d_ino values
2304 [19982] localedata: fr.po: spelling mistake for error code EXDEV
2305 [20008] localedata: km_KH: convert to translit_neutral
2306 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
2307 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
2308 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
2309 [20482] localedata: de_CH: abbreviated weekdays should be two letters
2310 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
2312 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
2313 they're set, wrong errors returned by gaih_inet when lookup functions
2315 [20756] localedata: [PATCH] Use Unicode wise thousands separator
2316 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
2318 [20952] localedata: yuw_PG: new locale
2319 [21084] localedata: charmaps/IBM858: new codepage
2320 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
2321 [21242] libc: assert gives pedantic warning in old gcc versions
2322 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
2323 __regcall calling convention
2324 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
2325 [21326] libc: C99 functions are not declared for C++11 and later if
2326 _GNU_SOURCE is not predefined by g++
2327 [21457] libc: sys/ucontext.h namespace
2328 [21530] libc: tmpfile() should be implemented using O_TMPFILE
2329 [21660] math: GCC fails to compile a formula with tgmath.h
2330 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
2331 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
2332 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
2333 [21684] math: tgmath.h handling of complex integers
2334 [21685] math: tgmath.h handling of bit-fields
2335 [21686] math: tgmath.h handling of __int128
2336 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2338 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
2340 [21750] localedata: column width of characters incompatible with classical
2342 [21754] malloc: malloc: Perform as little work as possible after heap
2343 consistency check failures
2344 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
2345 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
2346 [21791] string: Unused XXX_chk_XXX functions in libc.a
2347 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
2349 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
2351 [21845] localedata: Added new Locale bho_NP
2352 [21853] localedata: Fix abday Which looks same as day in zh_SG
2353 [21854] localedata: Added New Locale en_SC
2354 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
2355 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
2356 _dl_runtime_resolve_avx_slow
2357 [21885] network: getaddrinfo: gethosts does not release resolver context
2358 on memory allocation failure
2359 [21899] libc: XPG4.2 sigaction namespace
2360 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
2362 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
2364 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
2365 errno value, causing getaddrinfo to fail
2366 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
2367 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
2368 instead of EAI_NODATA
2369 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
2370 constant PTRACE_SEIZE_DEVEL
2371 [21930] math: C-only gcc builtins used in <math.h> isinf
2372 [21932] network: Unpaired __resolv_context_get in generic get*_r
2374 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
2375 [21944] libc: sigval namespace
2376 [21951] localedata: Update hanzi collation by stroke
2377 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
2378 sysdeps/x86_64/fpu/e_expf.S
2379 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
2380 allocation in syscall loops)
2381 [21959] localedata: Fix Country name for xh_ZA
2382 [21960] localedata: Fix abmon for bem_ZM
2383 [21966] math: AVX2 mathvec functions use FMA without checking
2384 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
2385 [21971] localedata: Added New Locale for mfe_MU
2386 [21972] libc: assert macro requires operator== (int) for its argument type
2387 [21973] math: [sparc] libm missing sqrtl compat symbol
2388 [21974] libc: Remove __bb_init_func and __bb_exit_func
2389 [21982] string: stratcliff.c: error: assuming signed overflow does not
2391 [21986] stdio: __guess_grouping is called incorrectly
2392 [21987] math: [sparc32] wrong bits/long-double.h installed
2393 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
2395 [22022] localedata: Missing country_name for mni_IN
2396 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
2398 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
2400 [22026] locale: iconv_open: heap overflow on gconv_init failure
2401 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
2402 [22035] math: [m68k] bits/math-inline.h macro namespace
2403 [22038] localedata: Fix abbreviated weeks and months for Somali
2404 [22044] localedata: Remove redundant data for Limburgish Language
2405 [22050] malloc: Linking with -lmcheck does not hook
2406 __malloc_initialize_hook correctly
2407 [22051] libc: zero terminator in the middle of glibc's .eh_frame
2408 [22052] malloc: malloc failed to compile with GCC 7 and -O3
2409 [22070] localedata: charmaps/UTF-8: wcwidth for
2410 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
2411 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
2412 Jungseong and Jongseong) should be 0
2413 [22078] nss: nss_files performance issue in multi mode
2414 [22082] math: bits/math-finite.h exp10 condition
2415 [22086] libc: pcprofiledump incorrect cross-endian condition
2416 [22093] dynamic-link: ld.so no longer searches in .../x86_64
2417 [22095] network: Name server address allocation memory leak in resolv.conf
2419 [22096] network: __resolv_conf_attach can incorrectly free passed conf
2421 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
2422 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
2424 [22111] malloc: malloc: per thread cache is not returned when thread exits
2425 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
2426 [22134] libc: [linux] implement fexecve with execveat
2427 [22142] libc: [powerpc] printf outputs a wrong value of DBL_MAX on ppc64 and
2429 [22145] libc: ttyname() gives up too early in the face of namespaces
2430 [22146] math: C++ build issue with float128 on x86_64
2431 [22153] nptl: nptl: save error code before process termination
2432 [22156] libc: [hppa,ia64,microblaze] Executable stack default
2433 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
2434 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
2435 [22165] libc: [hppa] Text relocations in libc.so
2436 [22180] libc: destructor registered via __cxa_atexit is called twice
2437 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
2438 symlinks") cause "make" segfaults
2439 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
2441 [22207] libc: FAIL: stdlib/test-atexit-race
2442 [22225] math: nearbyint arithmetic moved before feholdexcept
2443 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
2444 [22235] math: iscanonical in C++ and float128
2445 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
2446 the svid compat wrapper
2447 [22244] math: ynf and yn are wrong without the svid compat wrapper
2448 [22273] libc: Improper assert in Linux posix_spawn implementation
2449 [22284] libc: -pg -pie doesn't work
2450 [22292] locale: localedef exits with error 4 when it should be error 1
2451 [22294] locale: Allow "" for int_currency_symbol definition in locales.
2452 [22295] locale: Don't warn on non-symbolic characters in locale sources in
2454 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
2455 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
2457 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
2458 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
2459 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
2460 [22322] libc: [mips64] wrong bits/long-double.h installed
2461 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
2462 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
2464 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
2465 [22343] malloc: Integer overflow in posix_memalign
2466 [22347] libc: getrandom() returns the number of bytes that were copied to
2467 the buffer even though the comments say "Return 0 on success and -1 on
2469 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
2470 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
2472 [22370] dynamic-link: Incorrect note padding check
2473 [22375] libc: malloc returns pointer from tcache_get when should return
2474 NULL (CVE-2017-17426)
2475 [22377] math: iseqsig, float128 and C++
2476 [22382] localedata: Error in tpi_PG locale
2477 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
2478 inside the ASCII printable range
2479 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
2481 [22403] localedata: Slash needs escaping in some locales
2482 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
2483 [22409] network: res_hnok does not accept some host names used on the
2485 [22412] network: res_dnok, res_hnok should perform syntax checks
2486 [22413] network: ns_name_pton ignores syntactically invalid trailing
2488 [22415] stdio: setvbuf can lead to invalid free/segfault
2489 [22432] build: Non-deterministic build
2490 [22439] malloc: malloc_info should compute summary statistics for all sub-
2492 [22442] network: if_nametoindex could report index for the wrong
2493 networking interface
2494 [22446] build: aliasing violation calling readlink in handle_request
2495 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
2496 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
2497 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
2498 __nscd_hash/__nss_hash
2499 [22463] network: p_secstodate overflow handling
2500 [22469] localedata: pl_PL LC_COLLATE does not use i18n
2501 [22478] libc: sigwait can fail with EINTR
2502 [22505] libc: ldconfig processes include directive in locale-specific
2504 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
2505 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
2506 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
2507 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
2508 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
2509 [22534] localedata: Collation rules for Serbian and Bosnian should be the
2510 same as for Croatian
2511 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
2512 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
2513 [22577] libc: missing newline after "cannot allocate TLS data structures
2515 [22588] manual: manual/conf.texi: missing underscore in front of
2517 [22593] math: nextafter and nexttoward are declared with const attribute
2518 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
2519 [22603] string: ia64 memchr overflows internal pointer check
2520 [22605] libc: SH clone does not set the exit code correctly
2521 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
2523 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
2524 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
2525 modified in case of success
2526 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
2527 [22615] manual: manual: ambiguous wording about errno value in case of
2529 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
2531 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
2532 binaries or if /proc is not mounted (CVE-2017-16997)
2533 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
2534 [22630] build: $(no-pie-ldflag) is no longer effective
2535 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
2536 [22635] nptl: pthread_self returns NULL before libpthread is loaded
2537 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
2538 [22637] nptl: guard size is subtracted from thread stack size instead of
2540 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
2541 [22657] localedata: hu_HU: Avoid double space in date
2542 [22660] math: fmax, fmin sNaN handling on alpha
2543 [22664] libc: New warning of GCC8
2544 [22665] math: alpha: ceil and floor raise inexact exceptions
2545 [22666] math: alpha: trunc raise inexact exceptions
2546 [22667] libc: makecontext lacks stack alignment on i386
2547 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
2548 [22679] libc: getcwd(3) can succeed without returning an absolute path
2550 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
2551 elision and tunables
2552 [22687] math: [powerpc-nofpu] complex long double functions spurious
2554 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
2555 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
2556 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
2558 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
2559 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
2561 [22701] nis: Incomplete removal of libnsl
2562 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
2563 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
2564 [22715] dynamic-link: FAIL: elf/tst-audit10
2565 [22719] libc: Backtrace tests fail on hppa
2566 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
2567 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
2568 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
2569 before the first call to crypt_r () in crypt/badsalttest.c
2576 * A per-thread cache has been added to malloc. Access to the cache requires
2577 no locks and therefore significantly accelerates the fast path to allocate
2578 and free small amounts of memory. Refilling an empty cache requires locking
2579 the underlying arena. Performance measurements show significant gains in a
2580 wide variety of user workloads. Workloads were captured using a special
2581 instrumented malloc and analyzed with a malloc simulator. Contributed by
2582 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
2584 * Unicode 10.0.0 Support: Character encoding, character type info, and
2585 transliteration tables are all updated to Unicode 10.0.0, using
2586 generator scripts contributed by Mike FABIAN (Red Hat).
2587 These updates cause user visible changes, especially the changes in
2588 wcwidth for many emoji characters cause problems when emoji sequences
2589 are rendered with pango, see for example:
2590 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
2592 * Collation of Hungarian has been overhauled and is now consistent with "The
2593 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
2596 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
2598 - The GNU C Library will now detect when /etc/resolv.conf has been
2599 modified and reload the changed configuration. The new resolver option
2600 “no-reload” (RES_NORELOAD) disables this behavior.
2602 - The GNU C Library now supports an arbitrary number of search domains
2603 (configured using the “search” directive in /etc/resolv.conf);
2604 previously, there was a hard limit of six domains. For backward
2605 compatibility, applications that directly modify the ‘_res’ global
2606 object are still limited to six search domains.
2608 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
2609 Library will now randomly pick a name server from the configuration as a
2610 starting point. (Previously, the second name server was always used.)
2612 * The tunables feature is now enabled by default. This allows users to tweak
2613 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
2615 * New function reallocarray, which resizes an allocated block (like realloc)
2616 to the product of two sizes, with a guaranteed clean failure upon integer
2617 overflow in the multiplication. Originally from OpenBSD, contributed by
2618 Dennis Wölfing and Rüdiger Sonderfeld.
2620 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
2621 These are extended versions of preadv and pwritev, respectively, taking an
2622 additional flags argument. The set of supported flags depends on the
2623 running kernel; full support currently requires kernel 4.7 or later.
2625 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
2626 create a new session ID for the spawned process. This feature is
2627 scheduled to be added to the next major revision of POSIX; for the time
2628 being, it is available under _GNU_SOURCE.
2630 * errno.h is now safe to use from C-preprocessed assembly language on all
2631 supported operating systems. In this context, it will only define the
2632 Exxxx constants, as preprocessor macros expanding to integer literals.
2634 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
2635 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
2636 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
2637 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
2639 To compile programs that use this feature, the compiler must support
2640 128-bit floating point with the type name _Float128 (as defined by TS
2641 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
2642 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
2643 must be defined to make the new interfaces visible.
2645 The new functions and macros correspond to those present for other
2646 floating-point types (except for a few obsolescent interfaces not
2647 supported for the new type), with F128 or f128 suffixes; for example,
2648 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
2649 printf or scanf formats for the new type; the strfromf128 and strtof128
2650 interfaces should be used instead.
2652 Deprecated and removed features, and other changes affecting compatibility:
2654 * The synchronization that pthread_spin_unlock performs has been changed to
2655 now be equivalent to a C11 atomic store with release memory order to the
2656 spin lock's memory location. Previously, several (but not all)
2657 architectures used stronger synchronization (e.g., containing what is
2658 often called a full barrier). This change can improve performance, but
2659 may affect odd fringe uses of spin locks that depend on the previous
2660 behavior (e.g., using spin locks as atomic variables to try to implement
2661 Dekker's mutual exclusion algorithm).
2663 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
2666 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
2667 will only be built and installed when the GNU C Library is configured with
2668 --enable-obsolete-rpc. This allows alternative RPC implementations, such
2669 as TIRPC or rpcsvc-proto, to be used.
2671 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
2672 libnss_compat, are deprecated, and will not be built or installed by
2675 The NIS(+) support library, libnsl, is also deprecated. By default, a
2676 compatibility shared library will be built and installed, but not headers
2677 or development libraries. Only a few NIS-related programs require this
2678 library. (In particular, the GNU C Library has never required programs
2679 that use 'gethostbyname' to be linked with libnsl.)
2681 Replacement implementations based on TIRPC, which additionally support
2682 IPv6, are available from <https://github.com/thkukuk/>. The configure
2683 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
2684 name service modules, to be built and installed.
2686 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
2687 support is enabled, the configured recursive resolver must support EDNS.
2688 (Responding to EDNS-enabled queries with responses which are not
2689 EDNS-enabled is fine, but FORMERR responses are not.)
2691 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
2692 servers have not supported this opcode for a long time.
2694 * The _res_opcodes variable has been removed from libresolv. It had been
2695 exported by accident.
2697 * <string.h> no longer includes inline versions of any string functions,
2698 as this kind of optimization is better done by the compiler. The macros
2699 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
2701 * The nonstandard header <xlocale.h> has been removed. Most programs should
2702 use <locale.h> instead. If you have a specific need for the definition of
2703 locale_t with no other declarations, please contact
2704 libc-alpha@sourceware.org and explain.
2706 * The obsolete header <sys/ultrasound.h> has been removed.
2708 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
2710 * The obsolete function cfree has been removed. Applications should use
2713 * The stack_t type no longer has the name struct sigaltstack. This changes
2714 the C++ name mangling for interfaces involving this type.
2716 * The ucontext_t type no longer has the name struct ucontext. This changes
2717 the C++ name mangling for interfaces involving this type.
2719 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
2720 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
2721 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
2722 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
2723 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
2724 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
2725 fpregset_t type no longer has the name struct fpu. This changes the C++
2726 name mangling for interfaces involving those types.
2728 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
2729 synced with the kernel:
2731 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
2732 are not supported on this architecture and have been removed.
2734 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
2735 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
2736 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
2738 Programs that assume the GET/SETREGS ptrace requests are universally
2739 available will now fail to build, instead of malfunctioning at runtime.
2741 Changes to build and runtime requirements:
2743 * Linux kernel 3.2 or later is required at runtime, on all architectures
2744 supported by that kernel. (This is a change from version 2.25 only for
2747 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
2749 * On most architectures, GCC 4.9 or later is required to build the GNU C
2750 Library. On powerpc64le, GCC 6.2 or later is required.
2752 Older GCC versions and non-GNU compilers are still supported when
2753 compiling programs that use the GNU C Library. (We do not know exactly
2754 how old, and some GNU extensions to C may be _de facto_ required. If you
2755 are interested in helping us make this statement less vague, please
2756 contact libc-alpha@sourceware.org.)
2758 Security related changes:
2760 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
2761 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
2763 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
2764 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
2766 * Avoid printing a backtrace from the __stack_chk_fail function since it is
2767 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
2770 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
2771 fixed (CVE-2017-12133).
2773 The following bugs are resolved with this release:
2775 [984] network: Respond to changed resolv.conf in gethostbyname
2776 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2777 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2779 [12189] libc: __stack_chk_fail should not attempt a backtrace
2781 [14096] time: Race condition on timezone/tst-timezone.out
2782 [14172] localedata: az_IR: new locale
2783 [14995] build: glibc fails to build if gold is the default linker, even if
2785 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2786 [16637] network: inet_pton function is accepting IPv6 with bad format
2787 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2788 x86 and other generic code
2789 [16875] localedata: ko_KR: fix lang_name
2790 [17225] localedata: ar_SY: localized month names for May and June are
2792 [17297] localedata: da_DK: wrong date_fmt string
2793 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2794 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2795 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2796 [19066] localedata: ar_SA abbreviated day and month names are in English
2797 [19569] network: resolv: Support an arbitrary number of search domains
2798 [19570] network: Implement random DNS server selection in the stub
2800 [19838] locale: localedef fails on PA-RISC
2801 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2802 order of 0D36 and 0D37
2803 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2805 [20098] libc: FAIL: debug/backtrace-tst on hppa
2806 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2808 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2810 [20313] localedata: Update locale data to Unicode 9.0
2811 [20424] manual: Document how to provide a malloc replacement
2812 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2814 [20686] locale: Add el_GR@euro to SUPPORTED.
2815 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2816 failures consistently
2817 [21015] dynamic-link: Document and fix --enable-bind-now
2818 [21016] nptl: pthread_cond support is broken on hppa
2819 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2820 frame-pointer on i386
2821 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2823 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2824 [21088] libc: Build fails with --enable-static-nss
2825 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2826 generic c code is used
2827 [21109] libc: Tunables broken on big-endian
2828 [21112] math: powf has large ulp errors with base close to 1 and exponent
2830 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2832 [21120] malloc: glibc malloc is incompatible with GCC 7
2833 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2835 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2836 (-0.0) when linking with -lieee
2837 [21171] math: log10, log2 and lgamma return incorrect results
2838 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2839 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2840 [21207] localedata: ce_RU: update weekdays from CLDR
2841 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2842 [21217] localedata: Update months from CLDR-31
2843 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2844 [21243] libc: support_delete_temp_file should issue warning for failed
2846 [21244] libc: support resolv_test_start() socket fd close should be
2848 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2849 new posix_spawn implementation
2850 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2851 leads to lower CPU frequency
2852 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2853 [21261] libc: [sparc64] bits/setjmp.h namespace
2854 [21267] network: [mips] bits/socket.h IOC* namespace
2855 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2856 [21270] libc: mmap64 silently truncates large offset values
2857 [21275] libc: posix_spawn always crashes on ia64 now
2858 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2859 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2860 [21289] libc: Incorrect declaration for 32-bit platforms with
2861 _FILE_OFFSET_BITS=64 causes build error
2862 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2863 not support gethostbyname4_r
2864 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2866 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2868 [21340] libc: Support POSIX_SPAWN_SETSID
2869 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2870 [21359] network: ns_name_pack needs additional byte in destination buffer
2871 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2872 against fragmentation attacks (CVE-2017-12132)
2873 [21369] network: resolv: Remove EDNS fallback
2874 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2876 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2877 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2878 [21393] stdio: Missing dup3 error check in freopen, freopen64
2879 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2880 [21399] localedata: Bad description for U00EC in
2881 localedata/charmaps/CP1254
2882 [21411] malloc: realloc documentation error
2883 [21426] network: sys/socket.h uio.h namespace
2884 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2885 [21445] libc: signal.h bsd_signal namespace
2886 [21455] network: Network headers stdint.h namespace
2887 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2889 [21475] network: resolv: Overlong search path is truncated mid-label
2890 [21511] libc: sigstack namespace
2891 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2892 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2893 bits/syscall.h: No such file or directory
2894 [21517] libc: struct sigaltstack namespace
2895 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2896 [21533] localedata: Update locale data to Unicode 10.0
2898 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2899 junk at end of line, first unrecognized character is `@'
2900 [21538] libc: SIG_HOLD missing for XPG4
2901 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2902 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2903 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2904 [21543] libc: sigevent namespace
2905 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2906 size for general purpose registers in mcontext_t structure
2907 [21550] libc: sigwait namespace
2908 [21552] libc: XPG4 bsd_signal namespace
2909 [21554] libc: sigpause namespace
2910 [21560] libc: sys/wait.h signal.h namespace
2911 [21561] libc: waitid namespace
2912 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2913 '/usr/include/stdlib.h': Permission denied
2914 [21575] libc: sys/wait.h missing struct rusage definition
2915 [21584] libc: sigaltstack etc namespace
2916 [21597] libc: siginterrupt namespace
2917 [21607] math: hppa: FAIL: math/test-tgmath
2918 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2920 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2921 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2922 stack and heap (CVE-2017-1000366)
2923 [21625] libc: wait3 namespace
2924 [21654] nss: Incorrect pointer alignment in NSS group merge result
2926 [21657] network: Parse interface zone id for node-local multicast
2927 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2929 [21666] libc: .symver is used on common symbol
2930 [21668] network: resolv: res_init cross-thread broadcast introduces race
2932 [21687] math: tgmath.h totalorder, totalordermag return type
2933 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2935 [21696] libc: Incorrect assumption of of __cpu_mask in
2936 posix/sched_cpucount.c
2937 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2938 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2940 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2941 leading to relocation crash
2942 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2943 `resolv_conf_matches (resp, conf)' failed.
2944 [21710] localedata: Added Samoan language locale for Samoa
2945 [21711] localedata: Pashto yesstr/nostr locale are missing
2946 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2947 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
2948 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2949 [21723] localedata: yesstr/nostr missing for Chinese language locale
2950 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2952 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2954 [21728] localedata: New Locale for Tongan language
2955 [21729] localedata: incorrect LC_NAME fields for hi_IN
2956 [21733] localedata: yesstr and nostr are missing for zh_HK
2957 [21734] localedata: Missing yesstr and nostr are for kw_GB
2958 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2959 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2960 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2961 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2963 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2965 [21749] localedata: Wrong abbreviated day name (“abday”) for
2967 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2968 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2969 [21759] localedata: missing yesstr and nostr for Tigrinya
2970 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2971 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2972 [21767] localedata: Missing Bislama locales
2973 [21768] localedata: Missing yesstr and nostr for aa_ET
2974 [21770] localedata: Missing Field in li_NL
2975 [21778] nptl: Robust mutex may deadlock
2976 [21779] libc: MicroBlaze segfaults when loading libpthread
2977 [21783] localedata: Fix int_select international_call_prefixes
2978 [21784] localedata: Inconsistency in country_isbn
2979 [21788] localedata: Missing Country Postal Abbreviations
2980 [21794] localedata: Added-country_isbn-for-Italy
2981 [21795] localedata: Add/Fix country_isbn for France
2982 [21796] localedata: Added country_isbn for Republic of Korea
2983 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2984 [21799] localedata: Added int_select international_call_prefixes
2985 [21801] localedata: Added int_select international_call_prefixes
2986 [21804] nptl: Double semicolon in thread-shared-types.h
2987 [21807] localedata: LC_ADDRESS fix for pap_CW
2988 [21808] localedata: Fix LC_ADDRESS for pap_AW
2989 [21821] localedata: Added country_name in mai_IN
2990 [21822] localedata: Fix LC_TIME for mai_IN
2991 [21823] localedata: missing yesstr, nostr for sa_IN
2992 [21825] localedata: Fix name_mrs for mag_IN
2993 [21828] localedata: 2.26 changelog should mention user visible changes
2995 [21835] localedata: Added Maithili language locale for Nepal
2996 [21838] localedata: Removed redundant data for the_NP
2997 [21839] localedata: Fix LC_MONETARY for ta_LK
2998 [21844] localedata: Fix Latin characters and Months Sequence.
2999 [21848] localedata: Fix mai_NP Title Name
3004 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
3005 24731-2:2010, is supported to enable declarations of functions from that
3006 TR. Note that not all functions from that TR are supported by the GNU C
3009 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
3010 18661-1:2014, is supported to enable declarations of functions and macros
3011 from that TS. Note that not all features from that TS are supported by
3014 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
3015 18661-4:2015, is supported to enable declarations of functions and macros
3016 from that TS. Note that most features from that TS are not supported by
3019 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
3020 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
3021 Since the GNU C Library defaults to a much newer revision of POSIX, this
3022 will only affect programs that specifically request an old conformance
3023 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
3024 see a change in the visible declarations, but a program compiled with
3025 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
3028 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
3029 defined by all multithreaded code, but glibc has not required this for
3032 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
3033 means that in a future release, the macros “major”, “minor”, and “makedev”
3034 will only be available from <sys/sysmacros.h>.
3036 These macros are not part of POSIX nor XSI, and their names frequently
3037 collide with user code; see for instance glibc bug 19239 and Red Hat bug
3038 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
3039 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
3042 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
3043 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
3044 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
3046 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
3047 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
3048 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
3049 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
3050 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
3051 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
3052 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
3053 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
3054 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
3055 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
3056 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
3059 * New <math.h> features are added from TS 18661-1:2014:
3061 - Signaling NaN macros: SNANF, SNAN, SNANL.
3063 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
3064 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
3065 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
3067 - llogb functions: the llogb, llogbf and llogbl functions, and the
3068 FP_LLOGB0 and FP_LLOGBNAN macros.
3070 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
3073 - Comparison macros: iseqsig.
3075 - Classification macros: iscanonical, issubnormal, iszero.
3077 - Total order functions: totalorder, totalorderf, totalorderl,
3078 totalordermag, totalordermagf, totalordermagl.
3080 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
3082 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
3083 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
3085 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
3086 are added to libc. They convert a floating-point number into string.
3088 * Most of glibc can now be built with the stack smashing protector enabled.
3089 It is recommended to build glibc with --enable-stack-protector=strong.
3090 Implemented by Nick Alcock (Oracle).
3092 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
3093 intended to be used instead of memset() to erase sensitive data after use;
3094 the compiler will not optimize out calls to explicit_bzero even if they
3095 are "unnecessary" (in the sense that no _correct_ program can observe the
3096 effects of the memory clear).
3098 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
3099 to float instead of double. This does not affect the ABI of any libraries
3100 that are part of the GNU C Library, but may affect the ABI of other
3101 libraries that use this type in their interfaces.
3103 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
3104 float_t and double_t types are now defined to long double instead of float
3105 and double. These options are not the default, and this does not affect
3106 the ABI of any libraries that are part of the GNU C Library, but it may
3107 affect the ABI of other libraries that use this type in their interfaces,
3108 if they are compiled or used with those options.
3110 * The getentropy and getrandom functions, and the <sys/random.h> header file
3113 * The buffer size for byte-oriented stdio streams is now limited to 8192
3114 bytes by default. Previously, on Linux, the default buffer size on most
3115 file systems was 4096 bytes (and thus remains unchanged), except on
3116 network file systems, where the buffer size was unpredictable and could be
3117 as large as several megabytes.
3119 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
3120 for the Linux quota interface which predates kernel version 2.4.22 has
3123 * The malloc_get_state and malloc_set_state functions have been removed.
3124 Already-existing binaries that dynamically link to these functions will
3125 get a hidden implementation in which malloc_get_state is a stub. As far
3126 as we know, these functions are used only by GNU Emacs and this change
3127 will not adversely affect already-built Emacs executables. Any undumped
3128 Emacs executables, which normally exist only during an Emacs build, should
3129 be rebuilt by re-running “./configure; make” in the Emacs build tree.
3131 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
3132 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
3133 “no-ip6-dotint” had already been the default, and support for the
3134 “ip6-dotint” option was removed from the Internet in 2006.
3136 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
3137 flag from <resolv.h> have been removed. The option relied on a
3138 backwards-incompatible DNS extension which was never deployed on the
3141 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
3142 RES_BLAST defined in the <resolv.h> header file have been deprecated.
3143 They were already unimplemented.
3145 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
3146 _res.flags are deprecated. The flag was standardized in RFC 2133, but
3147 removed again from the IETF name lookup interface specification in RFC
3148 2553. Applications should use getaddrinfo instead.
3150 * DNSSEC-related declarations and definitions have been removed from the
3151 <arpa/nameser.h> header file, and libresolv will no longer attempt to
3152 decode the data part of DNSSEC record types. Previous versions of glibc
3153 only implemented minimal support for the previous version of DNSSEC, which
3154 is incompatible with the currently deployed version.
3156 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
3157 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
3158 <arpa/nameser.h> header file because the distinction between RR types and
3159 meta-RR types is not officially standardized, subject to revision, and
3160 thus not suitable for encoding in a macro.
3162 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
3163 and rhook members of the res_state type in <resolv.h> have been removed.
3164 The glibc stub resolver did not support these hooks, but the header file
3165 did not reflect that.
3167 * For multi-arch support it is recommended to use a GCC which has
3168 been built with support for GNU indirect functions. This ensures
3169 that correct debugging information is generated for functions
3170 selected by IFUNC resolvers. This support can either be enabled by
3171 configuring GCC with '--enable-gnu-indirect-function', or by
3172 enabling it by default by setting 'default_gnu_indirect_function'
3173 variable for a particular architecture in the GCC source file
3176 * GDB pretty printers have been added for mutex and condition variable
3177 structures in POSIX Threads. When installed and loaded in gdb these pretty
3178 printers show various pthread variables in human-readable form when read
3179 using the 'print' or 'display' commands in gdb.
3181 * Tunables feature added to allow tweaking of the runtime for an application
3182 program. This feature can be enabled with the '--enable-tunables' configure
3183 flag. The GNU C Library manual has details on usage and README.tunables has
3184 instructions on adding new tunables to the library.
3186 * A new version of condition variables functions have been implemented in
3187 the NPTL implementation of POSIX Threads to provide stronger ordering
3190 * A new version of pthread_rwlock functions have been implemented to use a more
3191 scalable algorithm primarily through not using a critical section anymore to
3194 Security related changes:
3196 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
3197 have been created with makecontext could fail to terminate due to a
3198 missing .cantunwind annotation. This has been observed to lead to a hang
3199 (denial of service) in some Go applications compiled with gccgo. Reported
3200 by Andreas Schwab. (CVE-2016-6323)
3202 * The DNS stub resolver functions would crash due to a NULL pointer
3203 dereference when processing a query with a valid DNS question type which
3204 was used internally in the implementation. The stub resolver now uses a
3205 question type which is outside the range of valid question type values.
3208 The following bugs are resolved with this release:
3210 [4099] stdio: Overly aggressive caching by stream i/o functions.
3211 [7065] build: Support building glibc with -fstack-protector or -fstack-
3213 [9842] localedata: en_CA: incorrect date format
3214 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
3215 before it started waiting
3216 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
3217 [15765] nptl: sem_open is wrongly a cancellation point
3218 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
3219 [16458] libc: endian.h and netinet/in.h byte order macros return values of
3221 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
3222 library linked with pthread
3223 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
3224 "FIXME: Ingo" issue)
3225 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
3226 [17252] libc: getrandom and getentropy syscall
3227 [17730] malloc: thread-local storage is sometimes improperly free()'d
3228 after being __libc_memalign()'d
3229 [18241] stdio: failed fseek on memstream does not set errno and can fail
3231 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
3233 [18463] nptl: pthread_cond_broadcast issue when surrounded by
3234 PTHREAD_PRIO_INHERIT mutex on ARM
3235 [18784] network: res_query and related function crash for special record
3236 type queries (CVE-2015-5180)
3237 [19380] math: strtod does not raise "inexact"
3238 [19387] string: Integer overflow in memchr
3239 [19390] string: Integer overflow in strncat
3240 [19398] build: linknamespace tests fail with massively parallel build
3241 [19402] nptl: Deadlock with robust shared mutex and asynchronous
3243 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
3244 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
3245 [19514] libc: [PATCH] Fix spelling errors in spelling
3246 "implement"/"implementation" in several places
3247 [19582] network: Deprecate RES_USE_INET6
3248 [19673] manual: clog10 docs appear to be erroneous
3249 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
3250 causes a segmentation fault
3251 [19826] libc: invalid pointer returned from __tls_get_addr with static
3253 [20016] network: resolv: Remove hooks support from the API
3254 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
3256 [20033] math: [x86_64] vectorized math function don't call the __finite
3258 [20116] nptl: use after free in pthread_create
3259 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
3260 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
3262 [20311] nptl: please install proc_service.h
3263 [20366] libc: Compilation errors in installed headers in strict-compliance
3265 [20370] malloc: malloc: Arena free list management is still racy
3266 (incorrect fix in bug 19243)
3267 [20386] libc: assert (X = 0) does not result in GCC warning
3268 [20432] malloc: malloc: Minimize interface required for interposition
3269 [20435] libc: Missing unwind info in __startcontext causes infinite loop
3270 in _Unwind_Backtrace (CVE-2016-6323)
3271 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
3272 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
3274 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
3275 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
3276 [20477] network: resolv: incorrect double-checked locking related to
3278 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
3280 [20495] math: x86_64 performance degradation due to AVX/SSE transition
3282 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
3283 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
3284 cause transition penalty
3285 [20517] math: sparcv9 missing fdiml compat symbol
3286 [20524] manual: strverscmp is inconsistent
3287 [20525] libc: <sys/quota.h> should be based on kernel headers
3288 [20539] math: GCC 7 -static -lm fails to link at -O3
3289 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
3291 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
3293 [20591] network: Remove obsolete DNSSEC support
3294 [20592] network: DNS resource record type classification macros in
3295 <arpa/nameser.h> are incorrect
3296 [20593] network: Update DNS RR type definitions
3297 [20611] network: getaddrinfo accepts invalid numeric scope IDs
3298 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
3300 [20629] network: libresolv: Remove support for bitstring labels
3302 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
3303 assertion: "maxidx >= 2"
3304 [20660] math: [arm] Use VSQRT
3305 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
3306 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
3307 [20689] libc: Test for FMA should also check for AVX.
3308 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
3309 [20715] math: iszero macro breaks existing code
3310 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
3311 [20728] libc: powerpc: Missing TOC stub in clone
3312 [20729] build: glibc-2.24 fails to build for i486 with -Os
3313 [20750] build: Build fails with default PIE enabled gcc-6.x
3314 [20768] math: [alpha] sqrt fegetenv namespace
3315 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
3317 [20787] math: float_t is defined as float incorrectly on x86_64 even if
3318 __FLT_EVAL_METHOD__ is 2
3319 [20790] network: rpcgen buffer overrun in get_prog_declaration
3320 [20822] nptl: race condition in __lll_unlock_elision on powerpc
3321 [20829] libc: crypt snprintf namespace
3322 [20847] libc: tst-vfork3 failure
3323 [20855] math: Default bits/mathdef.h has inappropriate float_t
3324 [20859] math: [sh4] FP_ILOGB0 invalid
3325 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
3326 U+20AC), not same as GBK
3327 [20915] dynamic-link: global-dynamic TLS broken on aarch64
3328 [20916] math: pow handling of sNaN arguments
3329 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
3330 [20919] math: Bad pow (qNaN, 0) result with -lieee
3331 [20940] math: hypot sNaN handling
3332 [20947] math: fmax, fmin sNaN handling
3333 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
3334 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
3336 [20971] string: powerpc64/power7 memchr overflows internal pointer check
3337 [20973] nptl: robust mutexes: Lost wake-ups
3338 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
3339 [20978] nis: strlen on null pointer in nss_nisplus
3340 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
3342 [21014] string: i686 memchr overflows internal pointer check
3343 [21019] libc: [mips] n32 lseek incorrect on overflow
3344 [21022] libc: [microblaze] __backtrace get_frame_size namespace
3345 [21026] libc: [MIPS] readahead syscall is broken on n64
3346 [21028] math: Fallback fesetexceptflag should always succeed
3347 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
3348 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
3350 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
3351 [21061] librt: [microblaze] librt lost clock_* exports
3352 [21073] libc: tunables: insecure environment variables passed to
3353 subprocesses with AT_SECURE
3354 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
3358 * The minimum Linux kernel version that this version of the GNU C Library
3359 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
3360 kernel version 2.6.32 or later suffices (on architectures that already
3361 required kernel versions more recent than 3.2, those requirements remain
3362 unchanged). Linux 3.2 or later kernel headers are required on all
3365 * The pap_AN locale has been deleted. This has been deprecated for a long
3366 time. It has been replaced by pap_AW & pap_CW, both of which have long
3367 been included in previous releases.
3369 * The readdir_r and readdir64_r functions have been deprecated. It is
3370 recommended to use readdir and readdir64 instead.
3372 * The type “union wait” has been removed. It was deprecated in the early
3373 1990s and never part of POSIX. Application code should use the int type
3374 instead of “union wait”.
3376 * A new NSS action is added to facilitate large distributed system
3377 administration. The action, MERGE, allows remote user stores like LDAP
3378 to be merged into local user stores like /etc/groups in order to provide
3379 easy to use, updated, and managed sets of merged credentials. The new
3380 action can be used by configuring it in /etc/nsswitch.conf:
3381 group: files [SUCCESS=merge] nis
3382 Implemented by Stephen Gallagher (Red Hat).
3384 * The deprecated __malloc_initialize_hook variable has been removed from the
3387 * The long unused localedef --old-style option has been removed. It hasn't
3388 done anything in over 16 years. Scripts using this option can safely
3391 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
3392 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
3393 return the next representable value in the direction of positive infinity
3394 and the nextdown functions return the next representable value in the
3395 direction of negative infinity. These are currently enabled as GNU
3398 Security related changes:
3400 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
3401 could result in a stack overflow when getnetbyname was called with an
3402 overly long name. (CVE-2016-3075)
3404 * Previously, getaddrinfo copied large amounts of address data to the stack,
3405 even after the fix for CVE-2013-4458 has been applied, potentially
3406 resulting in a stack overflow. getaddrinfo now uses a heap allocation
3407 instead. Reported by Michael Petlan. (CVE-2016-3706)
3409 * The glob function suffered from a stack-based buffer overflow when it was
3410 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
3411 Reported by Alexander Cherepanov. (CVE-2016-1234)
3413 * The Sun RPC UDP client could exhaust all available stack space when
3414 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
3415 alloca plugin for GCC. (CVE-2016-4429)
3417 * The IPv6 name server management code in libresolv could result in a memory
3418 leak for each thread which is created, performs a failing naming lookup,
3419 and exits. Over time, this could result in a denial of service due to
3420 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
3422 The following bugs are resolved with this release:
3424 [1170] localedata: ne_NP: update Nepali locale definition file
3425 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
3427 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
3428 [6796] math: fdim() does not set errno on overflow
3429 [10354] libc: posix_spawn should use vfork() in more cases than presently
3430 [11213] localedata: localedata: add copyright disclaimer to locale files
3431 [12143] localedata: chr_US: new Cherokee locale
3432 [12450] localedata: sgs_LT: new locale
3433 [12676] localedata: ln_CD: new locale
3434 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
3436 [13304] math: fma, fmaf, fmal produce wrong results
3437 [14259] build: --localedir arg to configure is ignored
3438 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
3439 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
3440 [14934] localedata: es_CL: wrong first weekday chilean locale
3441 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
3443 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
3445 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
3446 [15368] nptl: raise() is not async-signal-safe
3447 [15479] math: ceil, floor, round and trunc raise inexact exception
3448 [15578] localedata: kk_KZ: various updates
3449 [16003] localedata: pap_AN: punt old locale
3450 [16137] localedata: iw_IL: punt old locale
3451 [16190] localedata: eo: new esperanto locale
3452 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
3453 [16742] malloc: race condition: pthread_atfork() called before first
3454 malloc() results in unexpected locking behaviour/deadlocks
3455 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
3457 [16983] localedata: postal_fmt does not allow %l and %n modifiers
3458 [17565] localedata: pt_PT: wrong (work-)week start
3459 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
3460 [17950] build: Build fails with -msse
3461 [18205] localedata: be_BY*: wrong first_weekday and first_workday
3462 [18433] libc: posix_spawn does not return correctly upon failure to
3464 [18453] localedata: charmaps/IBM875: incorrect codes
3465 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
3467 [18896] localedata: he_IL: improvements for currency
3468 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
3469 Romanian locale data
3470 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
3472 [19056] libc: Deprecate readdir_r
3473 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
3475 [19198] localedata: nl_NL: small improvements for Dutch locales
3476 [19257] network: Per-thread memory leak in __res_vinit with IPv6
3477 nameservers (CVE-2016-5417)
3478 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
3480 [19400] locale: Language missing in "iso-639.def", trivial fix in
3482 [19431] malloc: Deadlock between fflush, getdelim, and fork
3483 [19505] libc: Incorrect file descriptor validity checks in
3484 posix_spawn_file_actions_add{open,close,dup2}
3485 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
3486 when using RTLD_NEXT
3487 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
3488 `intl/{gettextP,loadinfo}.h'
3489 [19534] libc: execle, execlp may use malloc
3490 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
3491 [19573] network: res_nclose and __res_maybe_init disagree about name
3492 server initialization, breaking Hesiod
3493 [19575] localedata: Status of GB18030 tables
3494 [19581] localedata: sr_* date_fmt string contains additional newline
3495 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
3497 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
3498 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
3499 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
3500 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
3502 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
3504 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
3506 [19610] dynamic-link: ldconfig -X removes stale symbolic links
3507 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
3508 [19633] locale: strfmon_l applies global locale to number formatting
3509 [19642] network: Memory leak in getnameinfo
3510 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
3511 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
3513 [19654] math: [x86_64] Need testcase for BZ #19590 fix
3514 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
3516 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
3517 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
3519 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
3521 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
3523 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
3524 pointers and lengths in error-case.
3525 [19727] locale: Converting from/to UTF-xx with iconv() does not always
3526 report errors on UTF-16 surrogates values.
3527 [19755] nscd: nscd assertion failure in gc
3528 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
3529 [19759] libc: mempcpy shouldn't be inlined
3530 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
3531 [19765] libc: s390 needs an optimized mempcpy
3532 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
3533 NAME_MAX limit assumption (CVE-2016-1234)
3534 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
3535 [19787] network: Missing and incorrect truncation checks in getnameinfo
3536 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
3538 [19791] network: Assertion failure in res_query.c with un-connectable name
3540 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
3541 [19822] math: libm.so install clobbers old version
3542 [19825] network: resolv: send_vc can return uninitialized data in second
3543 response to getaddrinfo
3544 [19830] network: nss_dns: should check RDATA length against buffer length
3545 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
3546 confronted with A/AAAA records of invalid size
3547 [19837] nss: nss_db: No retries for some long lines with a larger buffer
3548 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
3549 [19853] stdio: Printing IBM long double in decimal with high precision is
3551 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
3552 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
3553 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
3555 [19865] network: Assertion failure or memory leak in
3556 _nss_dns_getcanonname_r
3557 [19868] network: nss_dns: netent code does not skip over non-PTR records
3558 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
3560 [19881] string: Improve x86-64 memset
3561 [19907] string: Incorrect memcpy tests
3562 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
3564 [19925] libc: termios.h XCASE namespace
3565 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
3566 [19929] libc: limits.h NL_NMAX namespace
3567 [19931] stdio: Memory leak in vfprintf
3568 [19957] libc: clone(CLONE_VM) access invalid parent memory
3569 [19963] localedata: en_IL: New locale
3570 [19989] stdio: stdio.h cuserid namespace
3571 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
3573 [19996] locale: langinfo.h nl_langinfo_l namespace
3574 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
3575 [20010] network: getaddrinfo: Stack overflow in hostent translation
3577 [20012] stdio: libio: fmemopen append mode failure
3578 [20014] stdio: stdio.h namespace for pre-threads POSIX
3579 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
3580 [20023] libc: fcntl.h timespec namespace
3581 [20024] math: [x86_64] vectorized sincos trashes the stack
3582 [20031] network: nss_hesiod: Heap overflow in get_txt_records
3583 [20041] time: sys/time.h timespec namespace
3584 [20043] libc: unistd.h missing cuserid for UNIX98 and before
3585 [20044] libc: unistd.h missing pthread_atfork for UNIX98
3586 [20051] libc: ttyslot in wrong header under wrong conditions
3587 [20054] libc: gethostname not declared for XPG4
3588 [20055] libc: termios.h missing tcgetsid for XPG4
3589 [20072] dynamic-link: x86 init_cpu_features is called twice in static
3591 [20073] libc: sys/stat.h fchmod namespace
3592 [20074] libc: stdlib.h rand_r namespace
3593 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
3594 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
3596 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
3597 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
3599 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
3600 [20119] libc: Wrong mask for processors level type from CPUID
3601 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
3602 AS not supporting AVX512
3603 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
3605 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
3606 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
3608 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
3609 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
3610 [20178] libc: posix_spawn{p} should not call exit
3611 [20191] stdio: libio: vtables hardening
3612 [20195] string: FMA4 detection requires CPUID execution with register
3614 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
3615 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
3617 [20212] math: acos (sNaN) returns sNaN
3618 [20213] math: asin (sNaN) returns sNaN
3619 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
3620 [20218] math: [i386] asinhl (sNaN) returns sNaN
3621 [20219] math: [i386] atanhl (sNaN) returns sNaN
3622 [20222] stdio: fopencookie: Mangle function pointers
3623 [20224] math: [i386] cbrtl (sNaN) returns sNaN
3624 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
3625 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
3627 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
3628 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
3629 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
3630 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
3631 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
3632 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
3633 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
3634 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
3635 [20240] math: modf (sNaN) returns sNaN
3636 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
3637 [20250] math: frexp (sNaN) returns sNaN
3638 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
3639 [20255] math: [i386] fdim, fdimf return with excess range and precision /
3641 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
3642 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
3643 subscript is below array bounds [-Werror=array-bounds]
3644 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
3645 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
3647 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
3648 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
3650 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
3651 "invalid" exceptions
3652 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
3653 [20316] localedata: id_ID: Februari instead of Pebruari
3654 [20327] string: POWER8 strcasecmp returns incorrect result
3655 [20347] math: Failure: Test: j0_downward (0xap+0)
3656 [20348] libc: FAIL: misc/tst-preadvwritev64
3657 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
3658 [20350] libc: There is no test for p{read,write}64
3659 [20357] math: Incorrect cos result for 1.5174239687223976
3660 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
3664 * Unicode 8.0.0 Support: Character encoding, character type info, and
3665 transliteration tables are all updated to Unicode 8.0.0, using new
3666 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
3667 These updates cause user visible changes, such as the fixes for bugs
3668 89, 16061, and 18568.
3670 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
3671 kernel-internal CPU set size. This means that requests that change the
3672 CPU affinity which failed before (for example, an all-ones CPU mask) will
3673 now succeed. Applications that need to determine the effective CPU
3674 affinities need to call sched_getaffinity or pthread_getaffinity_np after
3675 setting it because the kernel can adjust it (and the previous size check
3676 would not detect this in the majority of cases).
3678 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
3679 the following new symbols are used: fts64_children, fts64_close,
3680 fts64_open, fts64_read and fts64_set.
3682 * getaddrinfo now detects certain invalid responses on an internal netlink
3683 socket. If such responses are received, an affected process will
3684 terminate with an error message of "Unexpected error <number> on netlink
3685 descriptor <number>" or "Unexpected netlink response of size <number> on
3686 descriptor <number>". The most likely cause for these errors is a
3687 multi-threaded application which erroneously closes and reuses the netlink
3688 file descriptor while it is used by getaddrinfo.
3690 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
3691 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
3692 unnecessary serialization of memory allocation requests across threads.
3693 The defect is now corrected. Users should see a substantial increase in
3694 the concurent throughput of allocation requests for applications which
3695 trigger this bug. Affected applications typically create and
3696 destroy threads frequently. (Bug 19048 was reported and analyzed by
3699 * There is now a --disable-timezone-tools configure option for disabling the
3700 building and installing of the timezone related utilities (zic, zdump, and
3701 tzselect). This is useful for people who build the timezone data and code
3702 independent of the GNU C Library.
3704 * The obsolete header <regexp.h> has been removed. Programs that require
3705 this header must be updated to use <regex.h> instead.
3707 * The obsolete functions bdflush, create_module, get_kernel_syms,
3708 query_module and uselib are no longer available to newly linked binaries;
3709 the header <sys/kdaemon.h> has been removed. These functions and header
3710 were specific to systems using the Linux kernel and could not usefully be
3711 used with the GNU C Library on systems with version 2.6 or later of the
3714 * Optimized string, wcsmbs and memory functions for IBM z13.
3715 Implemented by Stefan Liebler.
3717 * Newly linked programs that define a variable called signgam will no longer
3718 have it set by the lgamma, lgammaf and lgammal functions. Programs that
3719 require signgam to be set by those functions must ensure that they use the
3720 variable provided by the GNU C Library and declared in <math.h>, without
3721 defining their own copy.
3723 * The minimum GCC version that can be used to build this version of the GNU
3724 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
3725 still be used to compile programs using the GNU C Library.
3727 Security related changes:
3729 * An out-of-bounds value in a broken-out struct tm argument to strftime no
3730 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
3732 * The LD_POINTER_GUARD environment variable can no longer be used to disable
3733 the pointer guard feature. It is always enabled. Previously,
3734 LD_POINTER_GUARD could be used to disable security hardening in binaries
3735 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
3738 * An integer overflow in hcreate and hcreate_r could lead to an
3739 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
3741 * The catopen function no longer has unbounded stack usage. Reported by
3742 Max. (CVE-2015-8779)
3744 * The nan, nanf and nanl functions no longer have unbounded stack usage
3745 depending on the length of the string passed as an argument to the
3746 functions. Reported by Joseph Myers. (CVE-2014-9761)
3748 * A stack-based buffer overflow was found in libresolv when invoked from
3749 libnss_dns, allowing specially crafted DNS responses to seize control
3750 of execution flow in the DNS client. The buffer overflow occurs in
3751 the functions send_dg (send datagram) and send_vc (send TCP) for the
3752 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
3753 family. The use of AF_UNSPEC triggers the low-level resolver code to
3754 send out two parallel queries for A and AAAA. A mismanagement of the
3755 buffers used for those queries could result in the response of a query
3756 writing beyond the alloca allocated buffer created by
3757 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
3758 the overflow. Thanks to the Google Security Team and Red Hat for
3759 reporting the security impact of this issue, and Robert Holiday of
3760 Ciena for reporting the related bug 18665. (CVE-2015-7547)
3762 The following bugs are resolved with this release:
3764 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
3765 [887] math: Math library function "logb" and "nextafter" inconsistent
3766 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
3767 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
3768 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
3769 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
3771 [4404] localedata: German translation of "Alarm clock" is misleading
3772 [6799] math: nextafter() and nexttoward() doen't set errno on
3773 overflow/underflow errors
3774 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3776 [10432] nis: _nss_nis_setnetgrent assertion failure
3777 [11460] libc: fts has no LFS support
3778 [12926] network: getaddrinfo()/make_request() may spin forever
3779 [13065] nptl: Race condition in pthread barriers
3780 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3781 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3783 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3784 [14912] libc: Rename non-installed bits/*.h headers
3785 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3786 [15367] math: Let gcc use __builtin_isinf
3787 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3788 [15421] math: lgamma wrongly sets signgam for ISO C
3789 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3790 FE_INVALID with argument out of range
3791 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3793 [15786] dynamic-link: ifunc resolver functions can smash function
3795 [15918] math: Unnecessary check for equality in hypotf()
3796 [16061] localedata: Review / update transliteration data
3797 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3799 [16141] time: strptime %z offset restriction
3800 [16171] math: drem should be alias of remainder
3801 [16296] math: fegetround is pure?
3802 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3803 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3805 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3806 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3808 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3809 "Exception "Inexact" set" on ppc32
3810 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3811 [16517] math: Missing underflow exception from tanf/tan/tanl
3812 [16519] math: Missing underflow exception from sinhf
3813 [16520] math: Missing underflow exception from tanhf
3814 [16521] math: Missing underflow exception from exp2
3815 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3817 [16734] stdio: fopen calls mmap to allocate its buffer
3818 [16961] math: nan function incorrect handling of bad sequences
3819 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3820 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3821 [16985] locale: localedef: confusing error message when opening output
3823 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3824 [17197] locale: Redundant shift character in iconv conversion output at
3826 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3827 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3828 [17250] dynamic-link: static linking breaks nss loading
3829 (getaddrinfo/getpwnam/etc...)
3830 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3832 [17441] math: isnan() should use __builtin_isnan() in GCC
3833 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3834 (related to lock elision)
3835 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3836 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3837 [17887] time: strptime should be able to parse "+01:00" style timezones
3838 [17905] libc: catopen() Multiple unbounded stack allocations
3840 [18084] libc: backtrace (..., 0) dumps core on x86
3841 [18086] libc: nice() sets errno to 0 on success
3842 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3843 is too large (CVE-2015-8778)
3844 [18251] dynamic-link: SONAME missing when audit modules provides path
3845 [18265] libc: add attributes for wchar string and memory functions
3846 [18370] math: csqrt missing underflows
3847 [18421] libc: [hppa] read-only segment has dynamic relocations
3848 [18472] libc: Obsolete syscall wrappers should be compat symbols
3849 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3850 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3851 [18525] localedata: Remove locale timezone information
3852 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3853 [18568] localedata: Update locale data to Unicode 8.0
3854 [18589] locale: sort-test.sh fails at random
3855 [18595] math: ctan, ctanh missing underflows
3856 [18604] libc: assert macro-expands its argument
3857 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3858 contains a vector instruction exception.
3859 [18611] math: j1, jn missing errno setting on underflow
3860 [18618] localedata: sync Chechen locale definitions with other *_RU
3862 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3863 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3864 [18665] network: In send_dg, the recvfrom function is NOT always using the
3865 buffer size of a newly created buffer (CVE-2015-7547)
3866 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3868 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3870 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3871 [18699] math: tilegx cproj() for various complex infinities does not yield
3873 [18724] libc: Harden put*ent functions against data injection
3874 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3875 [18755] build: build errors with -DNDEBUG
3876 [18757] stdio: fmemopen fails to set errno on failure
3877 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3879 [18781] libc: openat64 lacks O_LARGEFILE
3880 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3881 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3882 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3883 [18790] math: [ldbl-128ibm] tanhl inaccurate
3884 [18795] libc: stpncpy fortification misses buffer lengths that are
3885 statically too large
3886 [18796] build: build fails for --disable-mathvec
3887 [18803] math: hypot missing underflows
3888 [18820] stdio: fmemopen may leak memory on failure
3889 [18823] math: csqrt spurious underflows
3890 [18824] math: fma spurious underflows
3891 [18825] math: pow missing underflows
3892 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3893 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3894 [18870] build: sem_open.c fails to compile with missing symbol
3896 [18872] stdio: Fix memory leak in printf_positional
3897 [18873] libc: posix_fallocate overflow check ineffective
3898 [18875] math: Excess precision leads incorrect libm
3899 [18877] libc: arm: mmap offset regression
3900 [18887] libc: memory corruption when using getmntent on blank lines
3901 [18918] localedata: hu_HU: change time to HH:MM:SS format
3902 [18921] libc: Regression: extraneous stat() and fstat() performed by
3904 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3905 binaries (CVE-2015-8777)
3906 [18951] math: tgamma missing underflows
3907 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3909 [18953] localedata: lt_LT: change currency symbol to the euro
3910 [18956] math: powf inaccuracy
3911 [18961] math: [i386] exp missing underflows
3912 [18966] math: [i386] exp10 missing underflows
3913 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3914 [18969] build: multiple string test failures due to missing locale
3916 [18970] libc: Reference of pthread_setcancelstate in libc.a
3917 [18977] math: float / long double Bessel functions not in XSI POSIX
3918 [18980] math: i386 libm functions return with excess range and precision
3919 [18981] math: i386 scalb*, ldexp return with excess range and precision
3920 [18982] stdio: va_list and vprintf
3921 [18985] time: Passing out of range data to strftime() causes a segfault
3923 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3924 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3925 [19012] locale: iconv_open leaks memory on error path
3926 [19016] math: clog, clog10 inaccuracy
3927 [19018] nptl: Mangle function pointers in tls_dtor_list
3928 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3929 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3930 [19048] malloc: malloc: arena free list can become cyclic, increasing
3932 [19049] math: [powerpc] erfc incorrect zero sign
3933 [19050] math: [powerpc] log* incorrect zero sign
3934 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3935 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3936 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3937 [19074] network: Data race in _res_hconf_reorder_addrs
3938 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3939 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3940 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3942 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3944 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3945 [19086] manual: posix_fallocate64 documented argument order is wrong.
3946 [19088] math: lround, llround missing exceptions close to overflow
3948 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3949 [19095] math: dbl-64 lrint incorrect for 64-bit long
3950 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3951 [19124] dynamic-link: ld.so failed to build with older assmebler
3952 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3953 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3954 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3955 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3956 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3957 pthread_setaffinity_np
3958 [19156] math: [ldbl-128] j0l spurious underflows
3959 [19164] nptl: tst-getcpu fails with many possible CPUs
3960 [19168] math: math/test-ildoubl and math/test-ldouble failure
3961 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3962 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3964 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3965 (FE_NOMASK_ENV) do not clear SSE exceptions
3966 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3967 _int_new_arena/reused_arena
3968 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3969 [19201] math: dbl-64 remainder incorrect sign of zero result
3970 [19205] math: bits/math-finite.h conditions do not match math.h and
3972 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3973 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3974 for C99-based standards
3975 [19212] libc: features.h not -Wundef clean
3976 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3978 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3979 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3980 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3982 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3983 "inexact" exceptions
3984 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3986 [19242] libc: strtol incorrect in Turkish locales
3987 [19243] malloc: reused_arena can pick an arena on the free list, leading
3988 to an assertion failure and reference count corruption
3989 [19253] time: tzset() ineffective when temporary TZ did not include DST
3991 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3992 [19270] math: [hppa] Shared libm missing __isnanl
3993 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3994 MAP_HUGETLB and MAP_STACK defines
3995 [19313] nptl: Wrong __cpu_mask for x32
3996 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3997 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3998 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3999 [19351] math: [ldbl-128ibm] logl inaccurate near 1
4000 [19363] time: x32: times() return value wrongly truncates/sign extends
4002 [19367] dynamic-link: Improve branch prediction on Silvermont
4003 [19369] network: Default domain name not reset by res_ninit when "search"
4004 / "domain" entry is removed from resolv.conf
4005 [19375] math: powerpc: incorrect results for POWER7 logb with negative
4007 [19385] localedata: bg_BG: time separator should be colon, not comma
4008 [19408] libc: linux personality syscall wrapper may erroneously return an
4009 error on 32-bit architectures
4010 [19415] libc: dladdr returns wrong names on hppa
4011 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
4012 IBM905, IBM907, and IBM909
4013 [19439] math: Unix98 isinf and isnan functions conflict with C++11
4014 [19443] build: build failures with -DDEBUG
4015 [19451] build: Make check fails on test-double-vlen2
4016 [19462] libc: Glibc failed to build with -Os
4017 [19465] math: Wrong code with -Os
4018 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
4020 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
4022 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
4023 [19486] math: S390: Math tests fail with "Exception Inexact set".
4024 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
4025 [19550] libc: [mips] mmap negative offset handling inconsistent with other
4027 [19590] math: Fail to build shared objects that use libmvec.so functions.
4031 * The following bugs are resolved with this release:
4033 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
4034 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
4035 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
4036 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
4037 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
4038 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
4039 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
4040 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
4041 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
4042 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
4043 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
4044 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
4045 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
4046 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
4047 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
4048 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
4049 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
4050 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
4051 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
4052 18657, 18676, 18694, 18696, 18887.
4054 * Cache information can be queried via sysconf() function on s390 e.g. with
4055 _SC_LEVEL1_ICACHE_SIZE as argument.
4057 * A buffer overflow in gethostbyname_r and related functions performing DNS
4058 requests has been fixed. If the NSS functions were called with a
4059 misaligned buffer, the buffer length change due to pointer alignment was
4060 not taken into account. This could result in application crashes or,
4061 potentially arbitrary code execution, using crafted, but syntactically
4062 valid DNS responses. (CVE-2015-1781)
4064 * The time zone file parser has been made more robust against crafted time
4065 zone files, avoiding heap buffer overflows related to the processing of
4066 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
4067 large time zone data files. Overly long time zone specifiers in the TZ
4068 variable no longer result in stack overflows and crashes.
4070 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
4071 for LD and GD on x86 and x86-64, has been implemented. You will need
4072 binutils-2.24 or later to enable this optimization.
4074 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
4075 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
4076 Hat). These updates cause user visible changes, such as the fix for bug
4079 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
4080 and getXXbyYY NSS calls for the same database, causing a denial-of-service
4081 condition in some applications.
4083 * Added vector math library named libmvec with the following vectorized x86_64
4084 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
4086 The library can be disabled with --disable-mathvec. Use of the functions is
4087 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
4088 Shared library libmvec.so is linked in as needed when using -lm (no need to
4089 specify -lmvec explicitly for not static builds).
4090 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
4092 * A new fmemopen implementation has been added with the goal of POSIX
4093 compliance. The new implementation fixes the following long-standing
4094 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
4095 old implementation is still present for use be by existing binaries.
4097 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
4098 releases. It has been fixed to match 2.19 and older, but binaries built
4099 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
4101 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
4102 Contributed by Roland McGrath (Google).
4104 * The header <regexp.h> is deprecated, and will be removed in a future
4105 release. Use of this header will trigger a deprecation warning.
4106 Application developers should update their code to use <regex.h> instead.
4108 This header was formerly part of SUS, but was deprecated in 1994 and
4109 removed from the standard in 2001. Also, the glibc implementation
4110 leaks memory. See BZ#18681 for more details.
4114 * The following bugs are resolved with this release:
4116 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
4117 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
4118 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
4119 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
4120 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
4121 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
4122 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
4123 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
4124 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
4125 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
4128 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
4129 too little memory for the to-be-scanned arguments and overflow the
4130 allocated buffer. The implementation now correctly computes the required
4131 buffer size when using malloc, and switches to malloc from alloca as
4134 * A new semaphore algorithm has been implemented in generic C code for all
4135 machines. Previous custom assembly implementations of semaphore were
4136 difficult to reason about or ensure that they were safe. The new version
4137 of semaphore supports machines with 64-bit or 32-bit atomic operations.
4138 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
4139 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
4141 * Port to Altera Nios II has been contributed by Mentor Graphics.
4143 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
4144 implementations for powerpc64/powerpc64le.
4145 Implemented by Adhemerval Zanella (IBM).
4147 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
4148 and powerpc64le. This may improve lock scaling of existing programs on
4149 HTM capable systems. The lock elision code is only enabled with
4150 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
4151 powerpc will issue a transaction abort on every syscall to avoid side
4152 effects being visible outside transactions.
4154 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
4155 AArch64. Contributed by ARM Ltd.
4157 * i386 memcpy functions optimized with SSE2 unaligned load/store.
4159 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
4160 under certain input conditions resulting in the execution of a shell for
4161 command substitution when the application did not request it. The
4162 implementation now checks WRDE_NOCMD immediately before executing the
4163 shell and returns the error WRDE_CMDSUB as expected.
4165 * CVE-2012-3406 printf-style functions could run into a stack overflow when
4166 processing format strings with a large number of format specifiers.
4168 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
4169 infinite loop if the DNS response contained a PTR record of an unexpected
4172 * The minimum GCC version that can be used to build this version of the GNU
4173 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
4174 still be used to compile programs using the GNU C Library.
4176 * The GNU C Library is now built with -Werror by default. This can be
4177 disabled by configuring with --disable-werror.
4179 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
4181 * The obsolete sigvec function has been removed. This was the original
4182 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
4183 programs have been using instead for about 25 years. Of course, ABI
4184 compatibility for old binaries using sigvec remains intact.
4186 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
4187 with newer versions of bison.
4189 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
4190 The original MIPS o32 hard-float ABI requires an FPU where double-precision
4191 registers overlay two consecutive single-precision registers. MIPS32R2
4192 introduced a new FPU mode (FR=1) where double-precision registers extend the
4193 corresponding single-precision registers which is incompatible with the
4194 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
4195 require the use of FR=1 making a transition necessary. New o32 ABI
4196 extensions enable users to migrate over time from the original o32 ABI
4197 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
4198 tracks the ABI of any loaded object and verifies that new objects are
4199 compatible. Mode transitions will also be requested as required and
4200 unsupportable objects will be rejected. The ABI checks include both soft and
4201 hard float ABIs for o32, n32 and n64.
4203 GCC 5 with GNU binutils 2.25 onwards:
4204 It is strongly recommended that all o32 system libraries are built using the
4205 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
4206 with the original and all new o32 ABI extensions. Configure a MIPS GCC
4207 compiler using --with-fp-32=xx to set this by default.
4211 * The following bugs are resolved with this release:
4213 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
4214 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
4215 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
4216 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
4217 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
4218 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
4219 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
4220 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
4221 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
4222 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
4223 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
4224 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
4225 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
4226 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
4227 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
4229 * Reverted change of ABI data structures for s390 and s390x:
4230 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
4231 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
4232 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
4233 are preserved pointing straight to the same implementation as the old ones.
4234 Given that, new callers will simply provide a too-big buffer to these
4235 functions. Any applications/libraries out there that embed jmp_buf or
4236 ucontext_t in an ABI-relevant data structure that have already been rebuilt
4237 against 2.19 headers will have to rebuilt again. This is necessary in any
4238 case to revert the breakage in their ABI caused by the glibc change.
4240 * Support for file description locks is added to systems running the
4241 Linux kernel. The standard file locking interfaces are extended to
4242 operate on file descriptions, not file descriptors, via the use of
4243 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
4244 are associated with an open file instead of a process.
4246 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
4248 * The minimum Linux kernel version that this version of the GNU C Library
4249 can be used with is 2.6.32.
4251 * Running the testsuite no longer terminates as soon as a test fails.
4252 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
4253 with PASS or FAIL lines for individual tests. A summary of the results is
4254 printed, including a list of failing lists, and "make check" exits with
4255 error status if there were any unexpected failures. "make check
4256 stop-on-test-failure=y" may be used to keep the old behavior.
4258 * The am33 port, which had not worked for several years, has been removed
4261 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
4262 supported; they now act the same as _DEFAULT_SOURCE (but generate a
4263 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
4264 conflicted with POSIX (support for which was removed in 2.19), the
4265 interfaces those macros enabled remain available when compiling with
4266 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
4267 test macros defined.
4269 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
4271 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
4272 This may improve lock scaling of existing programs on TX capable systems.
4273 The lock elision code is only built with --enable-lock-elision=yes and
4274 then requires a GCC version supporting the TX builtins. With lock elision
4275 default mutexes are elided via __builtin_tbegin, if the cpu supports
4276 transactions. By default lock elision is not enabled and the elision code
4279 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
4280 copy the path argument. This allowed programs to cause posix_spawn to
4281 deference a dangling pointer, or use an unexpected pathname argument if
4282 the string was modified after the posix_spawn_file_actions_addopen
4285 * All supported architectures now use the main glibc sysdeps directory
4286 instead of some being in a separate "ports" directory (which was
4287 distributed separately before glibc 2.17).
4289 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
4290 On configurations that support it (all Linux configurations), it's now
4291 used regardless of the --enable-add-ons switch to configure. It is no
4292 longer possible to build such configurations without pthreads support.
4294 * Locale names, including those obtained from environment variables (LANG
4295 and the LC_* variables), are more tightly checked for proper syntax.
4296 setlocale will now fail (with EINVAL) for locale names that are overly
4297 long, contain slashes without starting with a slash, or contain ".." path
4298 components. (CVE-2014-0475) Previously, some valid locale names were
4299 silently replaced with the "C" locale when running in AT_SECURE mode
4300 (e.g., in a SUID program). This is no longer necessary because of the
4303 * On x86-64, the dynamic linker's lazy-binding support is now compatible
4304 with application code using Intel MPX instructions. (With all previous
4305 versions, the MPX register state could be clobbered when making calls
4306 into or out of a shared library.) Note that while the new dynamic
4307 linker is compatible with all known x86 hardware whether or not it
4308 supports Intel MPX, some x86 instruction-set emulators might fail to
4309 handle the new instruction encodings. This is known to affect Valgrind
4310 versions up through 3.9 (but will be fixed in the forthcoming 3.10
4311 release), and might affect other tools that do instruction emulation.
4313 * Support for loadable gconv transliteration modules has been removed.
4314 The support for transliteration modules has been non-functional for
4315 over a decade, and the removal is prompted by security defects. The
4316 normal gconv conversion modules are still supported. Transliteration
4317 with //TRANSLIT is still possible, and the //IGNORE specifier
4318 continues to be supported. (CVE-2014-5119)
4320 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
4321 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
4322 resulting a denial-of-service security vulnerability in applications which
4323 use functions related to iconv. (CVE-2014-6040)
4327 * The following bugs are resolved with this release:
4329 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
4330 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
4331 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
4332 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
4333 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
4334 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
4335 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
4336 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
4337 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
4338 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
4339 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
4340 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
4341 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
4342 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
4343 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
4344 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
4345 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
4346 16431, 16453, 16474, 16506, 16510, 16529
4348 * Slovenian translations for glibc messages have been contributed by the
4349 Translation Project's Slovenian team of translators.
4351 * The public headers no longer use __unused nor __block. This change is to
4352 support compiling programs that are derived from BSD sources and use
4353 __unused internally, and to support compiling with Clang's -fblock
4354 extension which uses __block.
4356 * CVE-2012-4412 The strcoll implementation caches indices and rules for
4357 large collation sequences to optimize multiple passes. This cache
4358 computation may overflow for large collation sequences and may cause a
4359 stack or buffer overflow. This is now fixed to use a slower algorithm
4360 which does not use a cache if there is an integer overflow.
4362 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
4363 rules for large collation sequences to optimize multiple passes and falls
4364 back to alloca if malloc fails, resulting in a possible stack overflow.
4365 The implementation now falls back to an uncached collation sequence lookup
4368 * CVE-2013-4788 The pointer guard used for pointer mangling was not
4369 initialized for static applications resulting in the security feature
4370 being disabled. The pointer guard is now correctly initialized to a
4371 random value for static applications. Existing static applications need
4372 to be recompiled to take advantage of the fix (bug 15754).
4374 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
4375 to the d_name member of struct dirent, or omit the terminating NUL
4376 character. (Bugzilla #14699).
4378 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
4379 aligned_alloc functions could allocate too few bytes or corrupt the
4380 heap when passed very large allocation size values (Bugzilla #15855,
4383 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
4384 for AF_INET6 has been fixed (Bugzilla #16072).
4386 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
4387 pap_CW, quz_PE, the_NP.
4389 * Substantially revised locales: gd_GB, ht_HT
4391 * The LC_ADDRESS field was updated to support country_car for almost all
4394 * ISO 1427 definitions were updated.
4396 * ISO 3166 definitions were updated.
4398 * The localedef utility now supports --big-endian and --little-endian
4399 command-line options to generate locales for a different system from that
4400 for which the C library was built.
4402 * Binary locale files now only depend on the endianness of the system for
4403 which they are generated and not on other properties of that system. As a
4404 consequence, binary files generated with new localedef may be incompatible
4405 with old versions of the GNU C Library, and binary files generated with
4406 old localedef may be incompatible with this version of the GNU C Library,
4407 in the following circumstances:
4409 + Locale files may be incompatible on m68k systems.
4411 + Locale archive files (but not separate files for individual locales) may
4412 be incompatible on systems where plain "char" is signed.
4414 * The configure option --disable-versioning has been removed. Builds with
4415 --disable-versioning had not worked for several years.
4417 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
4418 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
4420 * SystemTap probes for malloc have been introduced.
4422 * SystemTap probes for slow multiple precision fallback paths of
4423 transcendental functions have been introduced.
4425 * Support for powerpc64le has been added.
4427 * The soft-float powerpc port now supports e500 processors.
4429 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
4431 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
4432 set of header declarations that are enabled by default, even when other
4433 feature test macros or compiler options such as -std=c99 would otherwise
4434 disable some of those declarations.
4436 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
4437 conflict with POSIX. The libbsd-compat library (which was a dummy library
4438 that did nothing) has also been removed.
4440 * Preliminary documentation about Multi-Thread, Async-Signal and
4441 Async-Cancel Safety has been added.
4443 * Change of ABI data structures for s390 and s390x:
4444 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
4445 allow for future hardware extensions. All library functions that accept or
4446 return these structures were versioned in order to provide backwards
4447 compatibility with existing code. However, not all cases can be handled
4448 with interface versioning. If an application embeds either structure into
4449 another structure and that structure is passed to another compilation unit
4450 which expects the newer larger-sized object then any access to the new
4451 fields will result in undefined behaviour. Similarly any access to fields
4452 that were moved by the enlarging of the structures will cause undefined
4453 behaviour. To fix the undefined behaviour all objects that are part of the
4454 final in-memory image must agree on the size of structures, and this may
4455 require recompilation.
4459 * The following bugs are resolved with this release:
4461 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
4462 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
4463 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
4464 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
4465 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
4466 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
4467 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
4468 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
4469 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
4470 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
4471 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
4472 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
4473 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
4476 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
4477 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
4478 Distributions can re-enable building and using pt_chown via the new configure
4479 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
4480 considerable security risks and should only be used if the distribution
4481 understands and accepts the risks.
4483 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
4486 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
4487 fixed (Bugzilla #15330).
4489 * Add support for calling C++11 thread_local object destructors on thread
4490 and program exit. This needs compiler support for offloading C++11
4491 destructor calls to glibc.
4493 * Improved worst case performance of libm functions with double inputs and
4496 * Support for priority inherited mutexes in pthread condition variables on
4497 non-x86 architectures.
4499 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
4501 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
4503 * Optimized string functions for ARM. Implemented by Will Newton and
4506 * Optimized libm functions for SPARC. Implemented by David S. Miller.
4508 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
4511 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
4512 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
4514 * Added a benchmark framework to track performance of functions in glibc.
4516 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
4517 It is based on draft TS 18661 and currently enabled as a GNU extension.
4519 * On Linux, the clock function now uses the clock_gettime system call
4520 for improved precision, rather than old times system call.
4522 * Added support for version-3 tz format files. This is needed when using
4523 the tz database release 2013e or later, and affects a few unusual cases --
4524 currently only TZ='America/Godthab' for time stamps after 2037.
4526 * Added new API functions pthread_getattr_default_np and
4527 pthread_setattr_default_np to get and set the default pthread
4528 attributes of a process.
4530 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
4531 This may improve lock scaling of existing programs on TSX capable systems.
4532 When the --enable-lock-elision=yes parameter is specified at configure
4533 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
4536 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
4537 availability). Implemented by Ryan S. Arnold.
4539 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
4543 * The following bugs are resolved with this release:
4545 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
4546 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
4547 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
4548 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
4549 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
4550 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
4551 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
4552 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
4553 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
4554 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
4555 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
4556 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
4557 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
4558 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
4559 14879, 14889, 14893, 14898, 14914.
4561 * Optimization of memcpy for MIPS.
4563 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
4564 EMFILE has been fixed (Bugzilla #14889).
4566 * The add-on ports collection is now distributed in the "ports" subdirectory
4567 of the main GNU C Library distribution, rather than separately.
4569 * Port to ARM AArch64 contributed by Linaro.
4571 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
4572 Optimized versions of memcpy, memset, and memcmp added for System z10 and
4574 Implemented by Andreas Krebbel.
4576 * The new function secure_getenv allows secure access to the environment,
4577 returning NULL if running in a SUID/SGID process. This function replaces
4578 the internal function __secure_getenv.
4580 * SystemTap static probes have been added into the dynamic linker.
4581 Implemented by Gary Benson.
4583 * Optimizations of string functions strstr, strcasestr and memmem.
4584 Implemented by Maxim Kuvyrkov.
4586 * The minimum Linux kernel version that this version of the GNU C Library
4587 can be used with is 2.6.16.
4589 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
4590 powerpc POWER7. Implemented by Will Schmidt.
4592 * New configure option --disable-nscd builds the C library such that it
4593 never attempts to contact the Name Service Caching Daemon (nscd).
4594 New configure option --disable-build-nscd avoids building nscd itself;
4595 this is the default if --disable-nscd is used.
4597 * Improved support for cross-compilation, including cross-testing and
4598 bootstrap builds without a previously built glibc.
4600 * Several testsuite tests are now able to test multiple IFUNC variants of an
4601 interface, rather than just testing the one that would be chooen by
4604 * New configure options --with-bugurl and --with-pkgversion, for
4605 distributors to use to embed their bug-reporting and package version
4606 information in --help and --version output.
4608 * The ttyname and ttyname_r functions on Linux now fall back to searching for
4609 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
4610 allows creation of chroots without the procfs mounted on /proc.
4612 * The `crypt' function now fails if passed salt bytes that violate the
4613 specification for those values. On Linux, the `crypt' function will
4614 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
4615 enabled, and fail on encrypted strings using the MD5 or DES algorithm
4616 when the mode is enabled.
4618 * The `clock_*' suite of functions (declared in <time.h>) is now available
4619 directly in the main C library. Previously it was necessary to link with
4620 -lrt to use these functions. This change has the effect that a
4621 single-threaded program that uses a function such as `clock_gettime' (and
4622 is not linked with -lrt) will no longer implicitly load the pthreads
4623 library at runtime and so will not suffer the overheads associated with
4624 multi-thread support in other code such as the C++ runtime library.
4626 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
4631 * The following bugs are resolved with this release:
4633 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
4634 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
4635 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
4636 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
4637 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
4638 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
4639 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
4640 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
4641 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
4642 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
4643 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
4644 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
4645 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
4646 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
4647 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
4648 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
4649 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
4650 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
4651 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
4652 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
4653 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
4654 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
4657 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
4658 configuring glibc with:
4659 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
4660 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
4661 Implemented by H.J. Lu.
4665 + define static_assert
4667 + do not declare gets
4669 + declare at_quick_exit and quick_exit also for ISO C11
4671 + aligned_alloc. NB: The code is deliberately allows the size parameter
4672 to not be a multiple of the alignment. This is a moronic requirement
4673 in the standard but it is only a requirement on the caller, not the
4676 + timespec_get added
4678 + uchar.h support added
4680 + CMPLX, CMPLXF, CMPLXL added
4682 Implemented by Ulrich Drepper.
4684 * Support for the IA-64 has been moved to ports.
4686 * Remove support for anything but ELF binary format
4688 * Checking versions of poll, ppoll added.
4689 Implemented by Ulrich Drepper.
4691 * More generic and 64-bit performance optimizations to math functions.
4692 Implemented by Ulrich Drepper.
4694 * New configure option --enable-obsolete-rpc makes the deprecated RPC
4695 headers and functions available at compile time as they were before
4696 version 2.14. This option will be removed at some time in the future
4697 after the TI-RPC library becomes fully sufficient for the needs of
4698 existing applications.
4700 * Compatibility code for Linux kernel versions before 2.4 has been removed.
4701 Note that glibc is not expected to work with any Linux kernel version
4704 * New header <sys/auxv.h> and function getauxval allowing easy access to
4705 the AT_* key-value pairs passed from the Linux kernel. The header also
4706 defines the HWCAP_* bits associated with the AT_HWCAP key.
4708 * New locales: mag_IN
4710 * New configure option --enable-systemtap builds SystemTap static probes
4711 into libc for setjmp and longjmp and into libpthread for various operations.
4712 So far the setjmp/longjmp probes and some of the libpthread probes are
4713 provided only for i*86 and x86_64.
4714 Implemented by Roland McGrath and Rayson Ho.
4716 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
4718 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
4721 * More optimized functions for SPARC. Implemented by David S. Miller.
4723 * Improved support for cross-compilation, especially bootstrap builds
4724 without a previously built glibc.
4726 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
4727 Chris Metcalf from Tilera.
4729 * Support for the old ARM ABI has been removed from ports. Only the EABI is
4730 now supported for ARM processors.
4732 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
4733 as the name of the dynamic linker, to distinguish it from the
4734 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
4736 * Support for CRIS has been removed from ports.
4738 * A new class of installed header has been documented for low-level
4739 platform-specific functionality. PowerPC added the first instance with a
4740 function to provide time base register access. Contributed by Tulio
4741 Magno Quites Machado Filho.
4743 * ix86 configurations now install header files that are consistent with
4744 what x86-64 configurations install. These same header files can be used
4745 for -m32, -m64, or -mx32 builds.
4746 Contributed by H.J. Lu.
4748 * Math library bug fixes. A thorough audit of all open math library bugs was
4749 conducted by Joseph Myers. Significant progress was made on many math
4750 library bugs resulting in more accurate exceptions and function results.
4751 Many thanks to all those that contributed including Andreas Jaeger for his
4752 patch review and work on the x87 trigonometric instruction issues.
4754 * Timezone data is no longer installed. Timezone-related binaries and scripts
4755 will continue to be installed. Users should obtain their timezone data from
4756 their distribution provider or from the tzdata package at
4757 <ftp://munnari.oz.au/pub/>.
4761 * The following bugs are resolved with this release:
4763 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
4764 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
4765 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
4766 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
4767 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
4768 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
4769 13484, 13506, 13515, 13523, 13524, 13538, 13540
4771 * New program pldd to list loaded object of a process
4772 Implemented by Ulrich Drepper.
4774 * Add nss_db support back to glibc. No more dependency on Berkeley db
4775 and support for initgroups lookups.
4776 Implemented by Ulrich Drepper.
4778 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4779 Contributed by HJ Lu.
4781 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4782 Contributed by HJ Lu.
4784 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4785 on x86-32 and x86-64.
4786 Contributed by Liubov Dmitrieva.
4788 * Optimized strchr and strrchr for SSE on x86-32.
4789 Contributed by Liubov Dmitrieva.
4791 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4792 for x86-64 and x86-32.
4793 Contributed by Liubov Dmitrieva.
4795 * New interfaces: scandirat, scandirat64
4796 Implemented by Ulrich Drepper.
4798 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4799 Implemented by Ulrich Drepper.
4801 * nscd now also caches the netgroup database.
4802 Implemented by Ulrich Drepper.
4804 * Integrate libm with gcc's -ffinite-math-only option.
4805 Implemented by Ulrich Drepper.
4807 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4808 to math functions. Implemented by Ulrich Drepper.
4810 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4811 Implemented by Ulrich Drepper.
4813 * New Linux interfaces: process_vm_readv, process_vm_writev
4815 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4816 Implemented by Ulrich Drepper.
4818 * Optimized nearbyint and strcasecmp for PPC.
4819 Implemented by Adhemerval Zanella.
4821 * New locales: bho_IN, unm_US, es_CU, ta_LK
4825 * The following bugs are resolved with this release:
4827 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4828 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4829 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4830 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4831 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4832 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4833 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4834 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4835 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4836 12795, 12811, 12813, 12814, 12841
4838 * The RPC implementation in libc is obsoleted. Old programs keep working
4839 but new programs cannot be linked with the routines in libc anymore.
4840 Programs in need of RPC functionality must be linked against TI-RPC.
4841 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4843 Visible changes of this change include (obviously) the inability to link
4844 programs using RPC functions without referencing the TI-RPC library and the
4845 removal of the RPC headers from the glibc headers.
4846 Implemented by Ulrich Drepper.
4848 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4849 syncfs, setns, sendmmsg
4851 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4852 yue_HK, lij_IT, mhr_RU
4854 * New encodings: CP770, CP771, CP772, CP773, CP774
4856 * New program sotruss to trace calls through PLTs
4857 Implemented by Ulrich Drepper.
4859 * The malloc hook implementation is marked deprecated and will be removed
4860 from the default implementation in the next version. The design never
4861 worked ever since the introduction of threads. Even programs which do
4862 not create threads themselves can use multiple threads created internally.
4866 * The following bugs are resolved with this release:
4868 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4869 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4870 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4871 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4874 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4876 * POWER7 optimizations: memset, memcmp, strncmp
4878 * New optimized string functions for x86-64: strnlen (SSE2),
4879 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4880 Implemented by Ulrich Drepper.
4884 * The following bugs are resolved with this release:
4886 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4887 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4888 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4889 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4890 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4891 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4892 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4893 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4895 * New interfaces: pthread_getname_np, pthread_setname_np
4897 * New Linux interface: recvmmsg
4899 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4901 * The dynamic linker now recognizes supported ABI versions from the
4902 EI_ABIVERSION field in the ELF header.
4903 Implemented by Ulrich Drepper.
4905 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4906 will not be used to fill in password fields in the passwd.byname replies.
4907 Instead it is used to synthesize the shadow.byname table, should it be
4908 missing. This is a useful mode in some installations involving Solaris.
4909 Implemented by Ulrich Drepper.
4911 * New locales: kok_IN, sq_MK, cv_RU
4915 * The following bugs are resolved with this release:
4917 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4918 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4919 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4920 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4921 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4922 10789, 10817, 10823, 10840, 10847
4924 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4926 Implemented by Ulrich Drepper.
4928 * Checking version of longjmp added that fails if an uninitialized stack
4929 frame would be created. Implemented by Ulrich Drepper.
4931 * STT_GNU_IFUNC is now supported in static executables.
4932 Implemented by H.J. Lu.
4934 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4936 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4937 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4938 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4939 Contributed by H.J. Lu.
4941 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4942 Implemented by Ulrich Drepper.
4944 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4946 Contributed by H.J. Lu.
4948 * Support for fma instruction in AVX on x86-64.
4949 Implemented by H.J. Lu and Ulrich Drepper.
4951 * AVX support in x86-64 auditing support in ld.so.
4952 Implemented by H.J. Lu.
4954 * STB_GNU_UNIQUE support added.
4955 Implemented by Ulrich Drepper.
4957 * Implement second fallback mode for optimized DNS lookup for even more
4958 broken environments. If two requests from the same port are not
4959 handled correctly close the socket and open a new one before sending
4960 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4961 can be used to select this mode right away, instead of rediscovering the
4962 necessity is every process again.
4963 Implemented by Ulrich Drepper.
4965 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4966 Implemented by Adam Tkac.
4968 * Optimized iconv conversions for S390x.
4969 Implemented by Andreas Krebbel.
4971 * Using condvars with PI mutexes is now more efficient due to kernel
4972 support for requeueing to PI futexes. NPTL support added for x86-64.
4973 Implemented by Ulrich Drepper.
4975 * New locales: ps_AF, my_MM
4979 * The following bugs are resolved with this release:
4981 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4982 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4983 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4984 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4985 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4987 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4988 Implemented by Ulrich Drepper.
4990 * New Linux interfaces: accept4, fallocate, fallocate64.
4991 Implemented by Ulrich Drepper.
4993 * Correct declarations of string function when used in C++ code. This
4994 could lead to compile errors for invalid C++ code.
4996 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4999 * New POSIX 2008 interface: psiginfo
5000 Implemented by Ulrich Drepper.
5002 * New ISO C++1x interfaces: quick_exit, at_quick_exit
5003 Implemented by Ulrich Drepper.
5005 * Support for selecting between multiple function definitions at runtime
5006 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
5008 * The libcrypt library can now use the hash function implementations in
5009 NSS. Implemented by Ulrich Drepper.
5011 * The malloc implementation can be compiled to be less memory efficient
5012 but higher performing in multi-threaded programs.
5013 Implemented by Ulrich Drepper.
5015 * New locales: nan_TW@latin, ks_IN
5017 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
5018 Implemented by Ulrich Drepper.
5020 * Extended printf hook support. It is possible to use user-defined types
5021 and extend existing format specifiers.
5022 Implemented by Ulrich Drepper.
5024 * Handling for group shadow files has been added.
5025 Implemented by Ulrich Drepper.
5027 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
5028 servers (the case, e.g., for some people using the built-in DNS
5029 server in ADSL modems/routers). There is a once-per-process timeout
5030 in case of a broken server. To avoid it, users can run nscd or put
5031 'options single-request' in /etc/resolv.conf.
5032 Implemented by Ulrich Drepper.
5036 * The following bugs are resolved with this release:
5038 2447, 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447,
5039 6461, 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712,
5040 6713, 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839,
5041 6843, 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955,
5042 6966, 6968, 6974, 6980, 6995, 7008, 7009, 7029
5044 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
5045 up at the same time. Implemented by Ulrich Drepper.
5047 * TLS descriptors for LD and GD on x86 and x86-64.
5048 Implemented by Alexandre Oliva.
5050 * getaddrinfo now handles DCCP and UDPlite.
5051 Implemented by Ulrich Drepper.
5053 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
5054 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
5055 Implemented by Ulrich Drepper.
5057 * New implementation of memmem, strstr, and strcasestr which is O(n).
5058 Implemented by Eric Blake.
5060 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
5062 * Implement "e" option for popen to open file descriptor with the
5063 close-on-exec flag set. Implemented by Ulrich Drepper.
5065 * Implement "b" mode for fmemopen. In this mode writes writes don't
5066 implicitly add a NUL byte and seeks from the end of the buffer really
5067 use the buffer end, not the string length as the basis.
5068 Implemented by Ulrich Drepper.
5070 * Many functions, exported and internal, now atomically set the close-on-exec
5071 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
5073 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
5075 Implemented by Pravin Satpute.
5077 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
5081 * The following bugs are resolved with this release:
5083 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
5084 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
5085 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
5086 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
5087 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
5088 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
5089 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
5091 * New locales: bo_CN, bo_IN, shs_CA.
5093 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
5095 * Sorting rules for some Indian languages (Devanagari and Gujarati).
5096 Implemented by Pravin Satpute.
5098 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
5100 * nscd caches now all timeouts for DNS entries
5101 Implemented by Ulrich Drepper.
5103 * nscd is more efficient and wakes up less often.
5104 Implemented by Ulrich Drepper.
5106 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
5107 vdprintf, and obstack_vprintf.
5108 Implemented by Jakub Jelinek.
5110 * Faster memset for x86-64.
5111 Implemented by Harsha Jagasia and H.J. Lu.
5113 * Faster memcpy on x86.
5114 Implemented by Ulrich Drepper.
5116 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
5117 Implemented by Ulrich Drepper.
5119 * Faster sqrt and sqrtf implemention for some PPC variants.
5120 Implemented by Steven Munroe.
5124 * The following bugs are resolved with this release:
5126 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
5127 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
5128 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
5129 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
5130 5071, 5103, 5104, 5112, 5113, 5184, 5186
5132 * More checking functions: fread, fread_unlocked, open*, mq_open.
5133 Implemented by Jakub Jelinek and Ulrich Drepper.
5135 * Extend fortification to C++. Implemented by Jakub Jelinek.
5137 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
5138 by not recognizing 'a' as a modifier when those specs are requested.
5139 Implemented by Jakub Jelinek.
5141 * PPC optimizations to math and string functions.
5142 Implemented by Steven Munroe.
5144 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
5145 options to be passed. Implemented by Ulrich Drepper.
5147 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
5149 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
5150 Implemented by Ulrich Drepper.
5152 * Handle private futexes in the NPTL implementation.
5153 Implemented by Jakub Jelinek and Ulrich Drepper.
5155 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
5156 Implemented by Roland McGrath and Ulrich Drepper.
5158 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
5160 * SHA-256 and SHA-512 based password encryption.
5161 Implemented by Ulrich Drepper.
5163 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
5164 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
5167 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
5168 Implemented by Ulrich Drepper.
5172 * The following bugs are resolved with this release:
5174 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
5175 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
5176 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
5177 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
5178 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
5179 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
5180 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
5183 * New Linux interfaces: epoll_pwait, sched_getcpu.
5185 * New generic interfaces: strerror_l.
5187 * nscd can now cache the services database. Implemented by Ulrich Drepper.
5191 * The following bugs are resolved with this release:
5193 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
5194 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
5195 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
5196 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
5197 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
5198 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
5199 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
5200 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
5201 3225, 3251, 3252, 3253, 3273
5203 * For Linux, the sorting of addresses returned by getaddrinfo now also
5204 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
5205 Implemented by Ulrich Drepper.
5207 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
5208 Implemented by Ulrich Drepper.
5210 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
5212 * New iconv module for MIK. Contributed by Alexander Shopov.
5214 * For sites with broken group and/or passwd database, the auto-propagate
5215 option of nscd can prevent creating ID lookup entries from the results
5216 of a name lookup and vice versa. This usually is no problem but some
5217 site might have problems with the default behavior.
5218 Implemented by Ulrich Drepper.
5220 * Iterating over entire database in NIS can be slow. With the
5221 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
5222 to trade time for memory. The entire database will be read at once.
5223 Implemented by Ulrich Drepper.
5225 * The interfaces introduced in RFC 3542 have been implemented by
5228 * Support for the new ELF hash table format was added by Ulrich Drepper.
5230 * Support for priority inheritance mutexes added by Jakub Jelinek and
5233 * Support for priority protected mutexes added by Jakub Jelinek.
5235 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
5236 or_IN, csb_PL, fy_NL, sr_ME.
5240 * More overflow detection functions.
5242 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
5243 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
5245 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
5246 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
5247 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
5248 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
5249 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
5250 by Masahide Washizawa.
5252 * It is now possible to install audit libraries for the dynamic linker using
5253 LD_AUDIT. Implemented by Ulrich Drepper.
5255 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
5256 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
5257 For a libc and libpthread that works well on Linux 2.4 kernels, we
5258 recommend using the stable 2.3 branch.
5260 * The new function open_wmemstream acts like open_memstream,
5261 but uses a wchar_t wide character buffer.
5263 * The new function ppoll is an improved version of poll, similar to pselect.
5265 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
5266 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
5267 renameat, unlinkat, linkat, symlinkat, readlinkat.
5269 * New Linux kernel system calls: unshare,
5270 inotify_init, inotify_add_watch, inotify_rm_watch.
5272 * The euidaccess function is now also known by the alias eaccess,
5273 for compatibility with some other systems.
5275 * Timezone data updated to 2006b version.
5279 * The following bugs are resolved with this release:
5281 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
5282 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
5283 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
5284 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
5285 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
5286 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
5288 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5290 * As of this release, GCC 4 can be used to compile the C Library.
5292 * Timezone data updated to 2005m version.
5296 * The following bugs are resolved with this release:
5298 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
5299 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
5300 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
5301 777, 787, 821, 822, 823, 825
5303 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5307 * Support for RFC 3678. Real implementations exist only for Linux so far.
5308 Implemented by Ulrich Drepper.
5310 * nscd can now cache entries persistently. Expiring entries are reloaded.
5311 For speedups the cache can be shared in memory with client processes.
5312 Implemented by Ulrich Drepper.
5314 * nscd can now perform SELinux checks.
5315 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
5317 * getaddrinfo queries are now cached. Canonical name lookup is performed
5319 Implemented by Ulrich Drepper.
5321 * The nothrow function attribute is used when headers are used by gcc when
5322 compiling C code. This can avoid significant amounts of exception
5325 * The malloc functions perform more error checking and are stricter when
5326 it comes to reacting on errors. The default action is to terminate
5327 the process after showing an error message. Implemented by Ulrich Drepper.
5329 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
5330 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
5332 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
5333 namespaces using the new function dlmopen(). This feature is of course,
5334 like most other dynamic loading functionality, not available in statically
5335 linked applications. Implemented by Ulrich Drepper.
5337 * Low-overhead boundary checking variants of string and some stdio functions
5338 were added. These are to be used in conjunction with a gcc patch by
5339 Jakub Jelinek which adds calls to these functions if possible.
5340 Implemented by Jakub Jelinek and Ulrich Drepper.
5342 * Old code for several operating systems and machine architectures that
5343 have not been in working condition in a long time have been removed from
5344 the main source tree maintained by the GNU C Library's maintainers.
5345 These files are now reside in the separate `ports' source module
5346 that is usable as an add-on when building the library.
5350 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
5351 interrogate the dynamic linker, compatible with the Solaris interface.
5353 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
5354 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
5356 * getifaddrs now uses the netlink interface on Linux to get its information.
5357 Implemented by Thorsten Kukuk.
5359 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
5360 Implemented by Ulrich Drepper.
5362 * support for non-executable stacks on x86 has been added. Changes mostly
5365 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
5368 * getaddrinfo now performs destination address selection according to
5373 * Thread-safe interfaces for many functions that access locale data
5374 were added in version 2.3, but these features were omitted from NEWS.
5375 Many functions have variants with an `_l' suffix that take a `locale_t'
5376 object as a parameter rather than consulting the current locale.
5377 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
5378 create and maintain `locale_t' objects. Additionally, the new function
5379 `uselocale' sets "the current locale" (as used by functions not so
5380 parameterized) set for an individual thread. These features were added
5381 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
5383 * The functions getresuid, getresgid, setresuid, and setresgid, which
5384 have long been available on Linux, are now declared in <unistd.h>
5385 and are now also available on the Hurd.
5387 * ELF thread-local storage support (TLS) now works on x86-64.
5389 * The new dynamic string token $LIB is expanded in shared library names.
5390 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
5392 * Aldy Hernandez contributed complete software floating point support for
5393 PowerPC machines with no FPU.
5395 * fexecve is implemented on Linux.
5397 * The `btowc' function should work at least twice as fast due to
5398 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
5400 * With approriate thread add-ons cancelable functions are now implemented
5401 in libc.so as well. No need to call the function in libpthread. This
5402 change allowed to finally disable the incorrect and expensive handling
5403 of weak definition in ld.so.
5405 * Yet more PLT entries in libc.so have been removed. We finally arrived
5406 at the bare minimum. Startup times improved appropriately.
5408 * Support for the new Linux/x86 system call interface was added. The
5409 AT_SYSINFO auxiliary vector entry is recognized and handled.
5413 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
5416 * iconv (the program and the interface) now accepts empty names (excluding
5417 options like //TRANSLIT) to mean "use charset of current locale".
5419 * localedef can now transliterate characters in strings which are not in
5420 the provided charmap. The information from the input locale is used.
5422 * Prelinking support was added for ELF targets. This requires additional
5423 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
5425 * Read-only stdio streams now use mmap to speed up operation by eliminating
5426 copying and buffer underflows. To use add 'm' to the mode string of
5427 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
5429 * The malloc functions were completely rewritten by Wolfram Gloger based
5430 on Doug Lea's malloc-2.7.0.c.
5432 * Isamu Hasegawa contributed a completely new and POSIX-conformant
5433 implementation of regex.
5435 * Bruno Haible upgraded the iconv and locale implementation to support
5438 * Contents of the LC_* and LANG environment variables in the CEN style are
5439 not recognized anymore. It never was used. Change by Ulrich Drepper.
5441 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
5442 thread-local storage (TLS) ABI on some platforms.
5443 Changes by Ulrich Drepper. SH support by Kaz Kojima.
5445 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
5446 EUC-JISX0213, and TSCII.
5448 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
5449 BSD-compatible interface for getting all network interface addresses.
5450 Implementation for IPv4 by Roland McGrath.
5452 * Loading of locale data is faster due to the introduction of a locale
5453 archive. Implemented by Roland McGrath and Ulrich Drepper.
5455 * Startup times are significantly reduced by not using exported functions
5456 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
5459 * Steven Munroe contributed a port to PowerPC64/Linux.
5463 * The Hurd now uses the GNU libio implementation of stdio rather than the
5464 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
5466 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
5467 with the same behavior as the Linux system call of the same name.
5471 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
5472 128-bit long double format.
5474 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
5475 IBM1161, and IBM1162 charsets.
5477 * Andreas Jaeger contributed a port to x86-64/Linux.
5479 * Peter Bruin contributed a port to PowerPC/Hurd.
5481 * libc functions using I/O streams now can handle wide-oriented streams
5484 * optimizations in the dynamic linker. Binaries created by recent binutils
5485 versions start up quicker due to reduced time spent on relocations.
5487 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
5491 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
5492 asinh, atanh, j0 for the 128-bit long double format.
5494 * Bruno Haible updated all the code handling Unicode in some form to
5495 support Unicode 3.1.
5497 * Speed of regex for single-byte locales is back to previous levels.
5498 Patch by Isamu Hasegawa.
5500 * Alpha, SPARC, and IA-64 now also using floating stacks.
5502 * Startup time of internationalized applications greatly improved through
5503 iconv cache. Use iconvconfig to generate the cache file.
5504 Contributed by Ulrich Drepper.
5506 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
5507 severe performance problems. Patch by David Mosberger.
5509 * The Hurd port got a lot more functionality like AIO, various stdio
5510 extensions, etc. Mainly done by Roland McGrath.
5512 * mtrace can now lookup symbols in shared libraries.
5516 * Intel's IA-64 math library is largely integrated. It provides fast and
5517 accurate implementatations for most basic and standard math functions
5518 in float, double, and long double format.
5520 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
5521 and asin for the 96-bit long double format and asin, log, tan for the
5522 128-bit long double format.
5524 * The beginning of a last-bit accurate math library by IBM Haifa were added.
5525 The basic double functions exist today. Contributed by Abraham Ziv
5526 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
5527 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
5529 * An asynchronous name lookup library was added. The interface is designed
5530 after POSIX AIO. The proposal was circulated beforehand to get comments.
5531 No negative ones came in. Implemented by Ulrich Drepper.
5533 * Port to S390/64bit contributed by Martin Schwidefsky
5534 <schwidefsky@de.ibm.com>.
5536 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
5537 of functions for Linux/IA-64.
5539 * The RPC code is now thread safe. Threads can now use the same service
5540 of different services at the same time. Patch by Eric Norum
5541 <eric.norum@usask.ca> with some help by Ulrich Drepper.
5543 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
5544 family of functions for Linux/S390.
5546 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
5547 of functions for Linux/x86.
5549 * Port to Linux/CRIS contributed by Axis Communications.
5553 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
5554 we can now check for namespace violations and missing declarations. The
5555 result is that almost all headers are now Unix-compliant (as defined in
5556 the upcoming XPG6). The negative side is that some programs might need
5557 corrections, too, if they depend on the incorrect form of the headers in
5558 previous versions which defined too many symbols and included too many
5561 * regex now handles multibyte character sets correctly.
5562 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
5564 * iconv (the program) does now conform to the upcoming XPG6 and handles
5565 charmaps. Instead of the charset names the path of charmaps can be
5566 provided and the conversion happens based on this data.
5567 Contributed by Ulrich Drepper.
5569 * The locale program now provides detailed information about the installed
5574 only lists the names of the supported locales
5578 provides details such as country, language, and codeset name.
5579 Contributed by Ulrich Drepper.
5583 * The gencat program now parses the input file according to the charset
5584 selected by the LC_CTYPE category. This is important for stateful
5585 character sets. To make generating catalogs easier there is a way
5586 to overwrite the charset selected by the locale: before the first
5587 message or $ quote line the catalog can contain a line like
5589 $ codeset=ISO-8859-2
5591 to select the charset (ISO-8859-2 in this case).
5593 Implemented by Shinya Hanataka and Ulrich Drepper.
5595 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
5596 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
5597 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
5599 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
5600 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
5602 * The LANGUAGE environment variable is now ignored unless the locale is
5603 changed from the default "C" locale.
5605 * The usual bug fixes.
5609 * Greg McGary added runtime support for bounds checking using gcc's
5610 new -fbounded-pointers option. ix86 target is complete. PowerPC
5613 * Thorsten Kukuk added secure mode support to nscd.
5615 * The Berkeley db libraries have been removed.
5617 Related, the nss_db module is now in a separate package since it
5618 obviously requires a database library being available.
5620 * Wide character I/O streams implemented by Ulrich Drepper.
5622 * Functions from the extended socket API added by Ulrich Drepper.
5624 * Functions feenableexcept and fedisableexcept to control the
5625 behaviour of individual exceptions have been added by Andreas Jaeger.
5627 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
5629 * The resolver code has been updated from bind 8.2.3-T5B which supports
5630 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
5633 This change could in some situations effect backward compatibility. Since
5634 now `_res' is a thread-local instead of a global variable, modifying it
5635 in one thread does not have any effect in other threads.
5637 The resolver library was also extended to allow IPv6 as the transport
5638 protocol for the requests. This work was done by Stig Venaas.
5640 * Compatibility code for K&R C compilers has been removed from the
5641 header files. A ISO C compiler is needed to use the library
5642 (conforming to either C89 or C99 standard).
5644 * Complete rewrite of the localedef program to support multibyte character
5645 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
5646 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
5647 Implemented by Ulrich Drepper.
5649 Bruno Haible significantly improved the generation and use of the data
5650 structures for the wide character tables.
5652 * Plural handling in gettext implemented by Ulrich Drepper.
5654 * The utmp daemon has been removed.
5656 * The port to MIPS-Linux has been finished by Andreas Jaeger.
5658 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
5661 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
5663 * POSIX barriers implemented by Kaz Kylheku.
5665 * POSIX spawn function family implemented by Ulrich Drepper.
5667 * POSIX spinlocks are now available.
5669 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
5671 * the configure option --enable-kernel=X.Y.Z allows to strip out
5672 compatibility for kernel versions before X.Y.Z. This is currently only
5673 implemented for Linux.
5675 * the sockaddr_in6 structure changed. The IPv6 working group added a new
5676 field sin6_scope_id. This means that all programs using IPv6 should be
5677 recompiled. Don't expect binary compatibility with previous glibc
5680 * various conversion modules for IBM character sets contributed by
5683 * IA-64 port by Jes Sorensen and HJ Lu.
5697 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
5699 * New xdr functions are added; some rpc functions are now 64bit clean.
5701 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
5703 * Fixed known incompatibilities with glibc 2.0.
5705 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
5707 * Optimized a number of functions (especially the ELF dynamic loader).
5709 * Update timezone data files.
5711 * lots of charmaps corrections
5713 * some new locale definitions and charmaps
5718 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
5719 conform to POSIX member type requirements. Symbol versions have been
5720 adjusted as needed within the library, and for direct use by applications,
5721 but there is potential for problems if third-party libraries use
5722 struct timeval as part of their interface. This does not present
5723 a problem for X and other "essential" system libraries.
5725 * An additional locale model to support C++ Standard Library locale
5726 model and probably more was implemented by Ulrich Drepper.
5728 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
5731 * Miles Bader provided the `argp' function family to support hierachical
5732 command line argument parsing, layered on top of getopt.
5734 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
5736 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
5739 * scanf recognizes the %a and %A format for scanning floating point numbers.
5741 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
5742 information and interfaces for the available integer types.
5744 * about 130 new math functions were added to implement the ISO C9x math
5747 * the new header <complex.h> contains definitions of the complex math
5748 functions from ISO C 9X.
5750 * the new header <tgmath.h> defines generic macros to use complex or
5751 real valued functions.
5753 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
5755 * Andreas Jaeger provided a test suite for the math library.
5757 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
5759 * Ulrich Drepper added character set conversion functions (iconv).
5761 * Optimized string functions have been added.
5763 * The localedata addon is now part of glibc.
5765 * An implementation of profiling shared libraries was added by Ulrich Drepper.
5767 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
5768 daemon for NSS (nscd).
5770 Missing a better place here are some numbers on improvements. Under
5771 Linux 2.1.125 un-tar-ing the kernel sources takes
5775 using local files 12.19s 6.88s 22.91s
5777 using NIS 13.92s 8.91s 26.34s
5779 using NIS & nscd 10.37s 7.34s 25.30s
5781 using NIS+ 27.57s 30.37s 640.46s
5783 using NIS+ & nscd 10.25s 7.83s 26.51s
5785 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5787 Keep in mind that non-namelookup related operations dominate above times.
5788 It was just a common complain that using NIS+ unpacking the kernel is
5791 [1] The old nscd implementation is not available anymore since it was
5792 distributed with glibc up to version 2.0.98 and thus is now replaced.
5794 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5796 * Mark Kettenis provided a Hesiod NSS module.
5798 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5799 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5801 * rcmd can now handle netgroups (Dick Streefland).
5803 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5806 * Support for the IPv6 protocol has been added to the socket API, as per the
5807 latest draft standards.
5809 * Support for Linux 2.2 has been added.
5811 * Interface changes relative to the latest 2.0.x release:
5812 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5813 addseverity NEW: Unix98
5814 alphasort64 NEW: LFS
5815 argp_err_exit_status NEW: argp, GNU ext
5816 argp_error NEW: argp, GNU ext
5817 argp_failure NEW: argp, GNU ext
5818 argp_help NEW: argp, GNU ext
5819 argp_parse NEW: argp, GNU ext
5820 argp_program_bug_address NEW: argp, GNU ext
5821 argp_program_version NEW: argp, GNU ext
5822 argp_program_version_hook NEW: argp, GNU ext
5823 argp_state_help NEW: argp, GNU ext
5824 argp_usage NEW: argp, GNU ext
5825 authdes_create NEW: Secure RPC
5826 authdes_getucred NEW: Secure RPC
5827 authdes_pk_create NEW: Secure RPC
5828 backtrace NEW: GNU ext.
5829 backtrace_symbols NEW: GNU ext.
5830 backtrace_symbols_fd NEW: GNU ext.
5832 cacosf NEW: ISO C 9x
5833 cacosh NEW: ISO C 9x
5834 cacoshf NEW: ISO C 9x
5835 cacoshl NEW: ISO C 9x
5836 cacosl NEW: ISO C 9x
5843 casinf NEW: ISO C 9x
5844 casinh NEW: ISO C 9x
5845 casinhf NEW: ISO C 9x
5846 casinhl NEW: ISO C 9x
5847 casinl NEW: ISO C 9x
5849 catanf NEW: ISO C 9x
5850 catanh NEW: ISO C 9x
5851 catanhf NEW: ISO C 9x
5852 catanhl NEW: ISO C 9x
5853 catanl NEW: ISO C 9x
5854 cbc_crypt NEW: Secure RPC
5858 ccoshf NEW: ISO C 9x
5859 ccoshl NEW: ISO C 9x
5865 cimagf NEW: ISO C 9x
5866 cimagl NEW: ISO C 9x
5867 clearerr_locked REMOVED
5868 clntunix_create NEW: sunrpc ext
5870 clog10 NEW: ISO C 9x
5871 clog10f NEW: ISO C 9x
5872 clog10l NEW: ISO C 9x
5882 cprojf NEW: ISO C 9x
5883 cprojl NEW: ISO C 9x
5885 crealf NEW: ISO C 9x
5886 creall NEW: ISO C 9x
5891 csinhf NEW: ISO C 9x
5892 csinhl NEW: ISO C 9x
5895 csqrtf NEW: ISO C 9x
5896 csqrtl NEW: ISO C 9x
5900 ctanhf NEW: ISO C 9x
5901 ctanhl NEW: ISO C 9x
5903 des_setparity NEW: Secure RPC
5904 ecb_crypt NEW: Secure RPC
5905 endutxent NEW: Unix98
5907 exp10f NEW: ISO C 9x
5908 exp10l NEW: ISO C 9x
5912 fattach NEW: STREAMS
5913 fdetach NEW: STREAMS
5917 feclearexcept NEW: ISO C 9x
5918 fegetenv NEW: ISO C 9x
5919 fegetexceptflag NEW: ISO C 9x
5920 fegetround NEW: ISO C 9x
5921 feholdexcept NEW: ISO C 9x
5923 feraiseexcept NEW: ISO C 9x
5924 ferror_locked REMOVED
5925 fesetenv NEW: ISO C 9x
5926 fesetexceptflag NEW: ISO C 9x
5927 fesetround NEW: ISO C 9x
5928 fetestexcept NEW: ISO C 9x
5929 feupdateenv NEW: ISO C 9x
5930 fflush_locked REMOVED
5934 fgets_unlocked NEW: GNU ext.
5935 fileno_locked REMOVED
5947 fputc_locked REMOVED
5948 fputs_unlocked NEW: GNU ext.
5949 fread_unlocked NEW: GNU ext.
5954 fstatvfs NEW: Unix98
5958 ftruncate64 NEW: LFS
5960 fwrite_unlocked NEW: GNU ext.
5961 gai_strerror NEW: IPv6
5965 getchar_locked REMOVED
5967 getdate_err NEW: Unix98
5968 getdate_r NEW: GNU ext.
5970 getnameinfo NEW: IPv6
5971 getnetname NEW: Secure RPC
5972 getpmsg NEW: STREAMS
5973 getpt NEW: Unix98 PTY
5974 getrlimit64 NEW: LFS
5975 getutxent NEW: Unix98
5976 getutxid NEW: Unix98
5977 getutxline NEW: Unix98
5978 glob64 NEW: GNU ext.
5979 globfree64 NEW: GNU ext.
5980 gnu_get_libc_release NEW: GNU ext.
5981 gnu_get_libc_version NEW: GNU ext.
5982 grantpt NEW: Unix98 PTY
5983 host2netname NEW: Secure RPC
5985 iconv_close NEW: iconv
5986 iconv_open NEW: iconv
5987 if_freenameindex NEW: IPv6
5988 if_indextoname NEW: IPv6
5989 if_nameindex NEW: IPv6
5990 if_nametoindex NEW: IPv6
5991 in6addr_any NEW: IPv6
5992 in6addr_loopback NEW: IPv6
5993 inet6_isipv4mapped NEW: IPv6
5994 isastream NEW: STREAMS
5995 iswblank NEW: GNU ext.
5996 key_decryptsession NEW: Secure RPC
5997 key_decryptsession_pk NEW: Secure RPC
5998 key_encryptsession NEW: Secure RPC
5999 key_encryptsession_pk NEW: Secure RPC
6000 key_gendes NEW: Secure RPC
6001 key_get_conv NEW: Secure RPC
6002 key_secretkey_is_set NEW: Secure RPC
6003 key_setnet NEW: Secure RPC
6004 key_setsecret NEW: Secure RPC
6005 llrint NEW: ISO C 9x
6006 llrintf NEW: ISO C 9x
6007 llrintl NEW: ISO C 9x
6008 llround NEW: ISO C 9x
6009 llroundf NEW: ISO C 9x
6010 llroundl NEW: ISO C 9x
6015 lrintf NEW: ISO C 9x
6016 lrintl NEW: ISO C 9x
6017 lround NEW: ISO C 9x
6018 lroundf NEW: ISO C 9x
6019 lroundl NEW: ISO C 9x
6021 makecontext NEW: Unix98
6022 mempcpy NEW: GNU ext.
6025 modify_ldt NEW: kernel
6029 nearbyint NEW: ISO C 9x
6030 nearbyintf NEW: ISO C 9x
6031 nearbyintl NEW: ISO C 9x
6032 netname2host NEW: Secure RPC
6033 netname2user NEW: Secure RPC
6034 nexttoward NEW: ISO C 9x
6035 nexttowardf NEW: ISO C 9x
6036 nexttowardl NEW: ISO C 9x
6040 passwd2des NEW: Secure RPC
6042 pow10f NEW: GNU ext.
6043 pow10l NEW: GNU ext.
6046 printf_size NEW: GNU ext.
6047 printf_size_info NEW: GNU ext.
6048 profil_counter REMOVED
6049 pthread_mutexattr_getkind_np REPLACED
6050 pthread_mutexattr_setkind_np REPLACED
6051 ptsname NEW: Unix98 PTY
6052 ptsname_r NEW: Unix98 PTY
6054 putchar_locked REMOVED
6055 putgrent NEW: GNU ext.
6057 putpmsg NEW: STREAMS
6058 pututxline NEW: Unix98
6062 readdir64_r NEW: LFS
6063 remquo NEW: ISO C 9x
6064 remquof NEW: ISO C 9x
6065 remquol NEW: ISO C 9x
6067 roundf NEW: ISO C 9x
6068 roundl NEW: ISO C 9x
6070 scalbln NEW: ISO C 9x
6071 scalblnf NEW: ISO C 9x
6072 scalblnl NEW: ISO C 9x
6074 sendfile NEW: kernel
6075 setcontext NEW: Unix98
6076 setrlimit64 NEW: LFS
6077 setutxent NEW: Unix98
6079 sigignore NEW: Unix98
6080 sigqueue NEW: POSIX.1b
6081 sigrelse NEW: Unix98
6082 sigset NEW: POSIX.1b
6083 sigtimedwait NEW: POSIX.1b
6084 sigwaitinfo NEW: POSIX.1b
6085 sincos NEW: GNU ext.
6086 sincosf NEW: GNU ext.
6087 sincosl NEW: GNU ext.
6091 strcasestr NEW: GNU ext.
6092 strtoimax NEW: ISO C 9x
6093 strtoumax NEW: ISO C 9x
6094 strverscmp NEW: GNU ext.
6095 svcauthdes_stats NEW: Secure RPC
6096 svcunix_create NEW: sunrpc etx
6097 svcunixfd_create NEW: sunrpc ext
6098 swapcontext NEW: Unix98
6099 tcgetsid NEW: Unix98 PTY
6100 tdestroy NEW: GNU ext.
6101 tgamma NEW: ISO C 9x
6102 tgammaf NEW: ISO C 9x
6103 tgammal NEW: ISO C 9x
6107 truncf NEW: ISO C 9x
6108 truncl NEW: ISO C 9x
6110 unlockpt NEW: Unix98 PTY
6111 updwtmpx NEW: Unix98
6112 user2netname NEW: Secure RPC
6113 utmpxname NEW: Unix98
6114 versionsort NEW: GNU ext.
6115 versionsort64 NEW: GNU ext.
6117 wcscasecmp NEW: GNU ext.
6118 wcsncasecmp NEW: GNU ext.
6119 wcsnlen NEW: GNU ext.
6120 wcstoimax NEW: ISO C 9x
6121 wcstoll NEW: ISO C 9x
6122 wcstoull NEW: ISO C 9x
6123 wcstoumax NEW: ISO C 9x
6125 wordexp NEW: POSIX.2
6126 wordfree NEW: POSIX.2
6127 write_profiling REMOVED
6128 xdecrypt NEW: Secure RPC
6129 xdr_authdes_cred NEW: Secure RPC
6130 xdr_authdes_verf NEW: Secure RPC
6131 xdr_cryptkeyarg NEW: Secure RPC
6132 xdr_cryptkeyarg2 NEW: Secure RPC
6133 xdr_cryptkeyres NEW: Secure RPC
6134 xdr_getcredres NEW: Secure RPC
6135 xdr_key_netstarg NEW: Secure RPC
6136 xdr_key_netstres NEW: Secure RPC
6137 xdr_keybuf NEW: Secure RPC
6138 xdr_keystatus NEW: Secure RPC
6139 xdr_netnamestr NEW: Secure RPC
6140 xdr_sizeof NEW: Secure RPC
6141 xdr_unixcred NEW: sunrpc ext
6142 xencrypt NEW: Secure RPC
6143 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6154 * inet_ntoa is thread-safe
6156 * updwtmp is moved from libutil to libc
6158 * rewrite of cbrt function
6160 * update of timezone data
6174 * add atoll function
6176 * fix complex problems in Berkeley DB code
6178 * fix math functions
6182 * fixed lots of header problems (especially Linux/GNU specific)
6184 * dynamic loader preserves all registers
6186 * Roland McGrath provided support for handling of auxiliary objects in
6187 the ELF dynamic loader.
6189 * support for parallel builds is improved
6193 * GNU extensions are no longer declared by default. To enable them you
6194 must define the macro `_GNU_SOURCE' in your program or compile with
6197 * The library has changed from using GNU ld symbol aliases to using weak
6198 symbols where available. The ELF object file format supports weak
6199 symbols; GNU ld also supports weak symbols in the a.out format. (There
6200 is also now support for other GNU ld extensions in ELF. Use the
6201 `--with-elf' option to configure to indicate you have ELF, and
6202 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
6203 of many files which contained only symbol aliases, reducing the size of
6204 the source and the compiled library; many other files were renamed to
6205 less cryptic names previously occupied by the symbol alias files.
6206 There is a new header file <elf.h> for programs which operate on
6207 files in the ELF format.
6209 * Converted to Autoconf version 2, so `configure' has more options.
6210 Run `configure --help' to see the details.
6212 * The library can now be configured to build profiling, highly-optimized
6213 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
6214 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
6215 `configure' enable building these extra libraries. The shared library is
6216 built by default when using both ELF and GNU ld. When shared libraries
6217 are enabled, the new library `-ldl' is available for arbitrary run-time
6218 loading of shared objects; its interface is defined in <dlfcn.h>. The
6219 new header file <link.h> gives access to the internals of the run-time
6220 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
6221 application of same name on other systems and it provides information
6222 about dynamically linked binaries.
6224 * The C library now provides the run-time support code for profiling
6225 executables compiled with `-pg'. Programs can control the profiling code
6226 through the interface in <sys/gmon.h>. The `gmon.out' files written by
6227 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
6228 the support for this file format was contributed by David Mosberger-Tang.
6230 * The math code has been replaced with a math library based on fdlibm from
6231 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
6232 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
6233 functions. The math functions now reside in a separate library, so
6234 programs using them will need to use `-lm' their linking commands.
6236 * John C. Bowman contributed optimized ix87 assembler inline functions.
6238 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
6239 mechanism similar to that found in Solaris 2. This is now used for the
6240 group, passwd, hosts, networks, services, protocols, rpc, ethers,
6241 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
6242 file controls what services are used for each individual database. This
6243 works by loading shared libraries with names specified in `nsswitch.conf',
6244 so service modules can be changed or added at any time without even
6245 relinking any program. Currently there are the file, db, and NIS based
6246 NSS services available.
6248 * The new functions `strtoq' and `strtouq' parse integer values from
6249 strings, like `strtol' and `strtoul', but they return `long long int' and
6250 `unsigned long long int' values, respectively (64-bit quantities).
6252 * The new functions `strtof' and `strtold' parse floating-point values from
6253 strings, like `strtod', but they return `float' and `long double' values,
6254 respectively (on some machines `double' and `long double' are the same).
6256 * Ulrich Drepper has contributed new implementations of the floating-point
6257 printing and reading code used in the `printf' family of functions and
6258 `strtod', `strtof', and `strtold'. These new functions are perfectly
6259 accurate, and much faster than the old ones.
6261 * The implementation of the POSIX locale model was completely rewritten by
6262 Ulrich Drepper. This includes the new programs `localedef' and `locale'
6263 to compile the POSIX locale definition.
6265 * The former dummy implementations of the strcoll and strxfrm function are
6266 now replaced by fully functional code contributed by Ulrich Drepper. The
6267 collation information comes from the POSIX locale definitions.
6269 * The new header <langinfo.h> defines an interface for accessing
6270 various locale-dependent data (using the locale chosen with `setlocale').
6272 * Ulrich Drepper has contributed a new suite of functions for operation on
6273 wide-character and multibyte-character strings, in <wchar.h>;
6274 and classification and case conversion of wide characters, in <wctype.h>.
6275 These new functions are conforming to the ISO C, Amendement 1 specification.
6277 * There is now a second implementation of the standard I/O library available.
6278 It comes from GNU libg++ as was written by Per Bothner, heavily modified
6279 by Hongjiu Lu and made thread safe by Ulrich Drepper.
6281 * You can now use positional parameter specifications in format strings
6282 for the `printf' and `scanf' families of functions. For example,
6283 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
6284 ``Number 6, Mr Jones''. This is mainly useful when providing different
6285 format strings for different languages, whose grammars may dictate
6286 different orderings of the values being printed. To support this
6287 feature, the interface for `register_printf_handler' has changed; see
6288 the header file <printf.h> for details.
6290 * The `printf' and `scanf' families of functions now understand a new
6291 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
6292 to group numbers as indicated by the locale; for `scanf' and friends, this
6293 says to accept as valid only a number with all the proper grouping
6294 separators in the right places. In the default "C" locale, numbers are
6295 not grouped; but locales for specific countries will define the usual
6296 conventions (i.e. separate thousands with `,' in the US locale).
6298 * The pgrp functions have been regularized, slightly incompatibly but much
6299 less confusingly. The core functions are now `getpgid' and `setpgid',
6300 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
6301 argument) and BSD `setpgrp' (identical to `setpgid') functions are
6302 provided for compatibility. There is no longer an incompatible `getpgrp'
6303 with an argument declared under _BSD_SOURCE; no BSD code uses it.
6305 * The new header file <fts.h> and suite of functions simplify programs that
6306 operate on directory trees. This code comes from 4.4 BSD.
6308 * The resolver code has been updated from the BIND 4.9.5-P1 release.
6309 Parts of the code were heavily modified by Ulrich Drepper to fit in the
6310 NSS scheme used in glibc.
6312 * There is a new malloc debugging hook `__memalign_hook'.
6314 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
6315 `unsigned int' in <sys/types.h>. These are for compatibility only and
6316 their use is discouraged.
6318 * The `-lmcheck' library to enable standard malloc debugging hooks is now
6319 done differently, so that it works even without GNU ld.
6321 * New function `euidaccess' checks allowed access to a file like `access',
6322 but using the effective IDs instead of the real IDs.
6324 * The time zone data files have been updated for the latest and greatest
6325 local time conventions of the countries of the world.
6327 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
6330 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
6331 for formatting floating-point numbers. They are provided only for
6332 compatibility; new programs should use `sprintf' instead. There are
6333 also equivalent function for the `long double' floating-point type and
6334 all functions also exist in a reentrant form.
6336 * The new auxiliary library `-lutil' from 4.4 BSD contains various
6337 functions for maintaining the login-record files (primarily of use to
6338 system programs such as `login'), and convenient functions for
6339 allocating and initializing a pseudo-terminal (pty) device.
6341 * Ulrich Drepper has contributed new support for System V style
6342 shared memory and IPC on systems that support it.
6344 * Ulrich Drepper has contributed several miscellaneous new functions found
6345 in System V: The `hsearch' family of functions provide an effective
6346 implementation of hash tables; `a64l' and `l64a' provide a very simple
6347 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
6350 * Ulrich Drepper has contributed new reentrant counterparts for the
6351 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
6353 * Ulrich Drepper has contributed new, highly-optimized versions of several
6354 string functions for the i486/Pentium family of processors.
6356 * Ulrich Drepper has updated the Linux-specific code, based largely
6357 on work done in Hongjiu Lu's version of GNU libc for Linux.
6358 The GNU library now supports Linux versions 2.0.10 and later,
6359 using the ELF object file format (i[3456]86-*-linux).
6361 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
6363 * David Mosberger-Tang and Richard Henderson have ported the C library
6364 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
6365 dynamic linking support for ELF/Alpha.
6367 * Richard Henderson contributed several Alpha optimized assembler function
6368 for arithmetic and string handling.
6370 * Ulrich Drepper has contributed a new set of message catalog functions to
6371 support multiple languages using the <libintl.h> interface, for use with
6372 his new package GNU gettext. Translation volunteers have contributed
6373 catalogs of the library's messages in Spanish, German, and Korean.
6375 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
6376 program and the `catgets' function for reading the catalog files it
6377 creates. (The <libintl.h> interface is preferred; we include the
6378 <nl_types.h> interface using `catgets' only for source compatibility with
6379 programs already written to use it.)
6381 * New header file <values.h> gives SVID-compatible names for <limits.h>
6384 * Various new macros, declarations, and small header files for compatibility
6387 * New function `group_member' is a convenient way to check if a process has
6388 a given effective group ID.
6390 * When using GCC 2.7 and later, the socket functions are now declared in a
6391 special way so that passing an argument of type `struct sockaddr_in *',
6392 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
6393 `struct sockaddr *' type, does not generate a type-clash warning.
6395 * New function `error' declared in header file <error.h> is a convenient
6396 function for printing error messages and optionally exiting; this is the
6397 canonical function used in GNU programs. The new functions `err', `warn',
6398 and friends in header file <err.h> are the canonical 4.4 BSD interface for
6399 doing the same thing.
6401 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
6402 POSIX.2 `glob' function to do ~ and {...} expansion.
6404 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
6405 `clearenv' which is used in POSIX.9 is also available.
6407 * New function `getsid' returns session ID number on systems that support it.
6409 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
6410 files <db.h> and <mpool.h> provide a rich set of functions for several
6411 types of simple databases stored in memory and in files, and <ndbm.h> is
6412 an old `ndbm'-compatible interface using the `db' functions. Link with
6413 `-ldb' to get these functions.
6415 * New macro `strdupa' copies a string like `strdup', but uses local stack
6416 space from `alloca' instead of dynamic heap space from `malloc'.
6418 * New function `strnlen' is like `strlen' but searches only a given maximum
6419 number of characters for the null terminator. `stpncpy', `strndup' and
6420 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
6423 * New function `statfs' in header <sys/statfs.h>.
6425 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
6426 provide convenient functions for operating on blocks of null-terminated
6429 * A new suite of functions in <utmp.h> handle all the details of reading
6430 and writing the utmp file.
6432 * An implementation of the NIS/YP(tm) based NSS service was contributed by
6435 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
6436 completely POSIX compliant and also implemented the extended functionality
6437 to handle alternate digit representation and alternate era date formats.
6439 * Ulrich Drepper provided an implementation of the `strptime' function
6440 defined in XPG4.2 which transforms a string into a `struct tm' value.
6442 * Paul Eggert provided the tzselect shell script as part of the timezone
6443 code. The shell script makes it easy to select the correct timezone
6446 * The implementation of the malloc family of functions is completely replaced
6447 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
6448 The implementation uses the mmap function (if available) and it is
6449 optimized for the use in multi threaded programs.
6451 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
6452 functions. This new functionality is usable by specifying a special
6453 salt string and it is compatible with implementation on *BSD systems.
6455 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
6456 `getsubopt' to handle second level command line options, `bsd_signal'
6457 to access BSD style `signal' functionality, the obsolete `regexp' style
6460 * the `lchown' function is available on system which support this
6463 * The implementation of the shadow password handling function was contributed
6466 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
6468 * POSIX.1g support was added. The <sys/select.h> header is available,
6469 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
6470 implementation of `getaddrinfo'.
6474 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
6476 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
6477 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
6479 * The new function `daemon' from 4.4 BSD is useful for server programs that
6480 want to put themselves in the background.
6482 * Joel Sherrill has contributed support for several standalone boards that
6483 run without an operating system.
6485 * `printf', `scanf' and friends now accept a `q' type modifier for long
6486 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
6488 * All of the code taken from BSD (notably most of the math and networking
6489 routines) has been updated from the BSD 4.4-Lite release.
6491 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
6493 * The new functions `getdomainname' and `setdomainname' fetch or change the
6494 YP/NIS domain name. These are system calls which exist on systems which
6497 * The time zone data files have been updated for the latest international
6500 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
6501 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
6505 * The C library now includes support for Sun RPC, from Sun's free
6506 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
6507 are included. (There is still no support for YP.)
6509 * Tom Quinn has contributed a port of the C library to SGI machines running
6510 Irix 4 (mips-sgi-irix4).
6512 * The new `lockf' function is a simplified interface to the locking
6513 facilities of `fcntl', included for compatibility.
6515 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
6517 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
6519 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
6522 * The error message printed by `assert' for a failed assertion now includes
6523 the name of the program (if using GNU ld) and the name of the calling
6524 function (with versions of GCC that support this).
6526 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
6528 * The library now includes the <sys/mman.h> header file and memory
6529 management functions `mmap', `munmap', `mprotect', `msync', and
6530 `madvise', on systems that support those facilities.
6532 * The interface for `mcheck' has changed slightly: the function called to
6533 abort the program when an allocation inconsistency is detected now takes
6534 an argument that indicates the type of failure. The new function
6535 `mprobe' lets you request a consistency check for a particular block at
6536 any time (checks are normally done only when you call `free' or `realloc'
6539 * It is now possible to easily cross-compile the C library, building on one
6540 system a library to run on another machine and/or operating system. All
6541 you need to do is set the variable `HOST_CC' in `configparms' to the
6542 native compiler for programs to run on the machine you are building on (a
6543 few generator programs are used on Unix systems); set `CC' to the
6546 * The new function `fexecve' (only implemented on the GNU system) executes
6547 a program file given a file descriptor already open on the file.
6551 * Brendan Kehoe has contributed most of a port to the DEC Alpha
6552 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
6554 * You can set the variable `libprefix' in `configparms' to specify a prefix
6555 to be prepended to installed library files; this makes it easy to install
6556 the GNU C library to be linked as `-lgnuc' or whatever.
6558 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
6559 copies a limited number of characters from a string, and returns the
6560 address of the last character written.
6562 * You no longer need to check for whether the installed `stddef.h' is
6563 compatible with the GNU C library. configure now checks for you.
6565 * You can now define a per-stream `fileno' function to convert the
6566 stream's cookie into an integral file descriptor.
6568 * ``malloc (0)'' no longer returns a null pointer. Instead, it
6569 allocates zero bytes of storage, and returns a unique pointer which
6570 you can pass to `realloc' or `free'. The behavior is undefined if
6571 you dereference this pointer.
6573 * The C library now runs on Sony NEWS m68k machines running either
6574 NewsOS 3 or NewsOS 4.
6576 * The new `syscall' function is a system-dependent primitive function
6577 for invoking system calls. It has the canonical behavior on Unix
6578 systems, including unreliable return values for some calls (such as
6579 `pipe', `fork' and `getppid').
6581 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
6582 to `EAGAIN', which is the preferred name. On systems whose kernels
6583 use two distinct codes, the C library now translates EWOULDBLOCK to
6584 EAGAIN in every system call function.
6588 * The GNU C Library Reference Manual is now distributed with the library.
6589 `make dvi' will produce a DVI file of the printed manual.
6590 `make info' will produce Info files that you can read on line using C-h i
6591 in Emacs or the `info' program.
6592 Please send comments on the manual to bug-glibc-manual@gnu.org.
6594 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
6596 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
6598 * Jason Merrill has contributed a port to the Sequent Symmetry running
6599 Dynix version 3 (i386-sequent-dynix).
6601 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
6602 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
6604 * New function `memory_warnings' lets you arrange to get warnings when
6605 malloc is running out of memory to allocate, like Emacs gives you.
6607 * The C library now contains the relocating allocator used in Emacs 19 for
6608 its editing buffers. This allocator (ralloc) minimizes allocation
6609 overhead and fragmentation by moving allocated regions around whenever it
6610 needs to. You always refer to a ralloc'd region with a "handle" (a
6611 pointer to a pointer--an object of type `void **').
6613 * There is a new `printf' format: `%m' gives you the string corresponding
6614 to the error code in `errno'.
6616 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
6617 or `%[' conversion, but instead of filling in a fixed-sized buffer you
6618 pass, the `a' modifier says to fill in a `char **' you pass with a
6621 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
6622 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
6623 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
6625 * `mkstemp' is a traditional Unix function to atomically create and open a
6626 uniquely-named temporary file.
6630 * The standard location for the file that says what the local timezone is
6631 has changed again. It is now `/usr/local/etc/localtime' (or more
6632 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
6634 * The distribution no longer contains any files with names longer than 14
6637 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
6638 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
6640 * New functions `ttyslot' and `syslog' from 4.4 BSD.
6644 * The configuration process has changed quite a bit. The `configure'
6645 script is now used just like the configuration scripts for other GNU
6646 packages. The `sysdeps' directory hierarchy is much rearranged.
6647 The file `INSTALL' explains the new scheme in detail.
6649 * The header files no longer need to be processed into ANSI C and
6650 traditional C versions. There is just one set of files to install, and
6651 it will work with ANSI or old C compilers (including `gcc -traditional').
6653 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
6654 MIPS DECStation running Ultrix 4.
6656 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
6657 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
6658 made itself into a shared library.
6660 * Yet further improved support for the i386, running 4.3 BSD-like systems
6661 (such as Mach 3 with the Unix single-server), or System V.
6663 * New function `strncasecmp' to do case-insensitive string comparison
6664 with limited length.
6666 * New function `strsep' is a reentrant alternative to `strtok'.
6668 * New functions `scandir' and `alphasort' for searching directories.
6670 * New function `setenv' is a better interface to `putenv'.
6672 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
6673 function for traversing a directory tree.
6675 * The GNU obstack package is now also part of the C library.
6676 The new function `open_obstack_stream' creates a stdio stream that
6677 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
6678 formatted output directly to an obstack.
6680 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
6681 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
6683 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
6685 * The new functions `strfry' and `memfrob' do mysterious and wonderful
6686 things to your strings.
6688 * There are some new test programs: test-fseek, testmb, and testrand.
6690 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
6691 These ports are not finished, but are a good starting place for really
6692 supporting those systems.
6694 * `/etc/localtime' is now the standard location for the file that says what
6695 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
6696 This follows the general principle that `/etc' is the place for all local
6697 configuration files.
6699 * The C library header files now use `extern "C"' when used by the C++
6700 compiler, so the C library should now work with C++ code.
6702 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
6703 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
6706 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
6707 function which uses the `merge sort' algorithm, and is said to be
6708 significantly faster than the old GNU `qsort' function. Merge sort is
6709 now the standard `qsort' function. The new algorithm can require a lot
6710 of temporary storage; so, the old sorting function is called when the
6711 required storage is not available.
6713 * The C library now includes Michael Glad's Ultra Fast Crypt, which
6714 provides the Unix `crypt' function, plus some other entry points.
6716 * The code and header files taken from 4.4 BSD have been updated with the
6717 latest files released from Berkeley.
6719 ----------------------------------------------------------------------
6722 Permission is granted to anyone to make or distribute verbatim copies
6723 of this document as received, in any medium, provided that the
6724 copyright notice and this permission notice are preserved,
6725 thus giving the recipient permission to redistribute in turn.
6727 Permission is granted to distribute modified versions
6728 of this document, or of portions of it,
6729 under the above conditions, provided also that they
6730 carry prominent notices stating who last changed them.
6733 version-control: never