1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2013 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 156, 431, 832, 2801, 7003, 9954, 10278, 11087, 13028, 13982, 13985,
13 14029, 14155, 14547, 14699, 14752, 14876, 14910, 15048, 15218, 15277,
14 15308, 15362, 15400, 15427, 15522, 15531, 15532, 15608, 15609, 15610,
15 15632, 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736,
16 15748, 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15844,
17 15847, 15849, 15855, 15856, 15857, 15859, 15867, 15886, 15887, 15890,
18 15892, 15893, 15895, 15897, 15905, 15909, 15917, 15919, 15921, 15923,
19 15939, 15948, 15963, 15966, 15988, 16032, 16034, 16036, 16037, 16041,
20 16071, 16072, 16074, 16078.
22 * CVE-2012-4412 The strcoll implementation caches indices and rules for
23 large collation sequences to optimize multiple passes. This cache
24 computation may overflow for large collation sequences and may cause a
25 stack or buffer overflow. This is now fixed to use a slower algorithm
26 which does not use a cache if there is an integer overflow.
28 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
29 rules for large collation sequences to optimize multiple passes and falls
30 back to alloca if malloc fails, resulting in a possible stack overflow.
31 The implementation now falls back to an uncached collation sequence lookup
34 * CVE-2013-4788 The pointer guard used for pointer mangling was not
35 initialized for static applications resulting in the security feature
36 being disabled. The pointer guard is now correctly initialized to a
37 random value for static applications. Existing static applications need
38 to be recompiled to take advantage of the fix (bug 15754).
40 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
41 to the d_name member of struct dirent, or omit the terminating NUL
42 character. (Bugzilla #14699).
44 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
45 aligned_alloc functions could allocate too few bytes or corrupt the
46 heap when passed very large allocation size values (Bugzilla #15855,
49 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
50 for AF_INET6 has been fixed (Bugzilla #16072).
52 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
55 * Substantially revised locales: gd_GB, ht_HT
57 * The LC_ADDRESS field was updated to support country_car for almost all
60 * ISO 1427 definitions were updated.
62 * ISO 3166 definitions were updated.
64 * The localedef utility now supports --big-endian and --little-endian
65 command-line options to generate locales for a different system from that
66 for which the C library was built.
68 * Binary locale files now only depend on the endianness of the system for
69 which they are generated and not on other properties of that system. As a
70 consequence, binary files generated with new localedef may be incompatible
71 with old versions of the GNU C Library, and binary files generated with
72 old localedef may be incompatible with this version of the GNU C Library,
73 in the following circumstances:
75 + Locale files may be incompatible on m68k systems.
77 + Locale archive files (but not separate files for individual locales) may
78 be incompatible on systems where plain "char" is signed.
80 * The configure option --disable-versioning has been removed. Builds with
81 --disable-versioning had not worked for several years.
83 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
84 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
86 * SystemTap probes for malloc have been introduced.
88 * Support for powerpc64le has been added.
90 * The soft-float powerpc port now supports e500 processors.
94 * The following bugs are resolved with this release:
96 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
97 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
98 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
99 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
100 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
101 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
102 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
103 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
104 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
105 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
106 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
107 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
108 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
111 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
112 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
113 Distributions can re-enable building and using pt_chown via the new configure
114 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
115 considerable security risks and should only be used if the distribution
116 understands and accepts the risks.
118 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
121 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
122 fixed (Bugzilla #15330).
124 * Add support for calling C++11 thread_local object destructors on thread
125 and program exit. This needs compiler support for offloading C++11
126 destructor calls to glibc.
128 * Improved worst case performance of libm functions with double inputs and
131 * Support for priority inherited mutexes in pthread condition variables on
132 non-x86 architectures.
134 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
136 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
138 * Optimized string functions for ARM. Implemented by Will Newton and
141 * Optimized libm functions for SPARC. Implemented by David S. Miller.
143 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
146 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
147 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
149 * Added a benchmark framework to track performance of functions in glibc.
151 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
152 It is based on draft TS 18661 and currently enabled as a GNU extension.
154 * On Linux, the clock function now uses the clock_gettime system call
155 for improved precision, rather than old times system call.
157 * Added new API functions pthread_getattr_default_np and
158 pthread_setattr_default_np to get and set the default pthread
159 attributes of a process.
161 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
162 This may improve lock scaling of existing programs on TSX capable systems.
163 When the --enable-lock-elision=yes parameter is specified at configure
164 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
167 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
168 availability). Implemented by Ryan S. Arnold.
170 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
174 * The following bugs are resolved with this release:
176 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
177 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
178 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
179 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
180 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
181 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
182 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
183 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
184 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
185 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
186 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
187 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
188 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
189 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
190 14879, 14889, 14893, 14898, 14914.
192 * Optimization of memcpy for MIPS.
194 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
195 EMFILE has been fixed (Bugzilla #14889).
197 * The add-on ports collection is now distributed in the "ports" subdirectory
198 of the main GNU C Library distribution, rather than separately.
200 * Port to ARM AArch64 contributed by Linaro.
202 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
203 Optimized versions of memcpy, memset, and memcmp added for System z10 and
205 Implemented by Andreas Krebbel.
207 * The new function secure_getenv allows secure access to the environment,
208 returning NULL if running in a SUID/SGID process. This function replaces
209 the internal function __secure_getenv.
211 * SystemTap static probes have been added into the dynamic linker.
212 Implemented by Gary Benson.
214 * Optimizations of string functions strstr, strcasestr and memmem.
215 Implemented by Maxim Kuvyrkov.
217 * The minimum Linux kernel version that this version of the GNU C Library
218 can be used with is 2.6.16.
220 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
221 powerpc POWER7. Implemented by Will Schmidt.
223 * New configure option --disable-nscd builds the C library such that it
224 never attempts to contact the Name Service Caching Daemon (nscd).
225 New configure option --disable-build-nscd avoids building nscd itself;
226 this is the default if --disable-nscd is used.
228 * Improved support for cross-compilation, including cross-testing and
229 bootstrap builds without a previously built glibc.
231 * Several testsuite tests are now able to test multiple IFUNC variants of an
232 interface, rather than just testing the one that would be chooen by
235 * New configure options --with-bugurl and --with-pkgversion, for
236 distributors to use to embed their bug-reporting and package version
237 information in --help and --version output.
239 * The ttyname and ttyname_r functions on Linux now fall back to searching for
240 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
241 allows creation of chroots without the procfs mounted on /proc.
243 * The `crypt' function now fails if passed salt bytes that violate the
244 specification for those values. On Linux, the `crypt' function will
245 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
246 enabled, and fail on encrypted strings using the MD5 or DES algorithm
247 when the mode is enabled.
249 * The `clock_*' suite of functions (declared in <time.h>) is now available
250 directly in the main C library. Previously it was necessary to link with
251 -lrt to use these functions. This change has the effect that a
252 single-threaded program that uses a function such as `clock_gettime' (and
253 is not linked with -lrt) will no longer implicitly load the pthreads
254 library at runtime and so will not suffer the overheads associated with
255 multi-thread support in other code such as the C++ runtime library.
257 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
262 * The following bugs are resolved with this release:
264 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
265 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
266 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
267 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
268 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
269 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
270 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
271 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
272 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
273 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
274 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
275 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
276 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
277 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
278 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
279 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
280 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
281 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
282 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
283 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
284 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
285 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
288 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
289 configuring glibc with:
290 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
291 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
292 Implemented by H.J. Lu.
296 + define static_assert
298 + do not declare gets
300 + declare at_quick_exit and quick_exit also for ISO C11
302 + aligned_alloc. NB: The code is deliberately allows the size parameter
303 to not be a multiple of the alignment. This is a moronic requirement
304 in the standard but it is only a requirement on the caller, not the
309 + uchar.h support added
311 + CMPLX, CMPLXF, CMPLXL added
313 Implemented by Ulrich Drepper.
315 * Support for the IA-64 has been moved to ports.
317 * Remove support for anything but ELF binary format
319 * Checking versions of poll, ppoll added.
320 Implemented by Ulrich Drepper.
322 * More generic and 64-bit performance optimizations to math functions.
323 Implemented by Ulrich Drepper.
325 * New configure option --enable-obsolete-rpc makes the deprecated RPC
326 headers and functions available at compile time as they were before
327 version 2.14. This option will be removed at some time in the future
328 after the TI-RPC library becomes fully sufficient for the needs of
329 existing applications.
331 * Compatibility code for Linux kernel versions before 2.4 has been removed.
332 Note that glibc is not expected to work with any Linux kernel version
335 * New header <sys/auxv.h> and function getauxval allowing easy access to
336 the AT_* key-value pairs passed from the Linux kernel. The header also
337 defines the HWCAP_* bits associated with the AT_HWCAP key.
339 * New locales: mag_IN
341 * New configure option --enable-systemtap builds SystemTap static probes
342 into libc for setjmp and longjmp and into libpthread for various operations.
343 So far the setjmp/longjmp probes and some of the libpthread probes are
344 provided only for i*86 and x86_64.
345 Implemented by Roland McGrath and Rayson Ho.
347 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
349 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
352 * More optimized functions for SPARC. Implemented by David S. Miller.
354 * Improved support for cross-compilation, especially bootstrap builds
355 without a previously built glibc.
357 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
358 Chris Metcalf from Tilera.
360 * Support for the old ARM ABI has been removed from ports. Only the EABI is
361 now supported for ARM processors.
363 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
364 as the name of the dynamic linker, to distinguish it from the
365 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
367 * Support for CRIS has been removed from ports.
369 * A new class of installed header has been documented for low-level
370 platform-specific functionality. PowerPC added the first instance with a
371 function to provide time base register access. Contributed by Tulio
372 Magno Quites Machado Filho.
374 * ix86 configurations now install header files that are consistent with
375 what x86-64 configurations install. These same header files can be used
376 for -m32, -m64, or -mx32 builds.
377 Contributed by H.J. Lu.
379 * Math library bug fixes. A thorough audit of all open math library bugs was
380 conducted by Joseph Myers. Significant progress was made on many math
381 library bugs resulting in more accurate exceptions and function results.
382 Many thanks to all those that contributed including Andreas Jaeger for his
383 patch review and work on the x87 trigonometric instruction issues.
385 * Timezone data is no longer installed. Timezone-related binaries and scripts
386 will continue to be installed. Users should obtain their timezone data from
387 their distribution provider or from the tzdata package at
388 <ftp://munnari.oz.au/pub/>.
392 * The following bugs are resolved with this release:
394 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
395 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
396 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
397 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
398 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
399 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
400 13484, 13506, 13515, 13523, 13524, 13538, 13540
402 * New program pldd to list loaded object of a process
403 Implemented by Ulrich Drepper.
405 * Add nss_db support back to glibc. No more dependency on Berkeley db
406 and support for initgroups lookups.
407 Implemented by Ulrich Drepper.
409 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
410 Contributed by HJ Lu.
412 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
413 Contributed by HJ Lu.
415 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
416 on x86-32 and x86-64.
417 Contributed by Liubov Dmitrieva.
419 * Optimized strchr and strrchr for SSE on x86-32.
420 Contributed by Liubov Dmitrieva.
422 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
423 for x86-64 and x86-32.
424 Contributed by Liubov Dmitrieva.
426 * New interfaces: scandirat, scandirat64
427 Implemented by Ulrich Drepper.
429 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
430 Implemented by Ulrich Drepper.
432 * nscd now also caches the netgroup database.
433 Implemented by Ulrich Drepper.
435 * Integrate libm with gcc's -ffinite-math-only option.
436 Implemented by Ulrich Drepper.
438 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
439 to math functions. Implemented by Ulrich Drepper.
441 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
442 Implemented by Ulrich Drepper.
444 * New Linux interfaces: process_vm_readv, process_vm_writev
446 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
447 Implemented by Ulrich Drepper.
449 * Optimized nearbyint and strcasecmp for PPC.
450 Implemented by Adhemerval Zanella.
452 * New locales: bho_IN, unm_US, es_CU, ta_LK
456 * The following bugs are resolved with this release:
458 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
459 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
460 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
461 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
462 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
463 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
464 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
465 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
466 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
467 12795, 12811, 12813, 12814, 12841
469 * The RPC implementation in libc is obsoleted. Old programs keep working
470 but new programs cannot be linked with the routines in libc anymore.
471 Programs in need of RPC functionality must be linked against TI-RPC.
472 The TI-RPC implementation is IPv6 enabled and there are other benefits.
474 Visible changes of this change include (obviously) the inability to link
475 programs using RPC functions without referencing the TI-RPC library and the
476 removal of the RPC headers from the glibc headers.
477 Implemented by Ulrich Drepper.
479 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
480 syncfs, setns, sendmmsg
482 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
483 yue_HK, lij_IT, mhr_RU
485 * New encodings: CP770, CP771, CP772, CP773, CP774
487 * New program sotruss to trace calls through PLTs
488 Implemented by Ulrich Drepper.
490 * The malloc hook implementation is marked deprecated and will be removed
491 from the default implementation in the next version. The design never
492 worked ever since the introduction of threads. Even programs which do
493 not create threads themselves can use multiple threads created internally.
497 * The following bugs are resolved with this release:
499 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
500 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
501 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
502 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
505 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
507 * POWER7 optimizations: memset, memcmp, strncmp
509 * New optimized string functions for x86-64: strnlen (SSE2),
510 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
511 Implemented by Ulrich Drepper.
515 * The following bugs are resolved with this release:
517 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
518 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
519 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
520 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
521 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
522 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
523 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
524 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
526 * New interfaces: pthread_getname_np, pthread_setname_np
528 * New Linux interface: recvmmsg
530 * STT_GNU_IFUNC implemented for Sparc by David Miller.
532 * The dynamic linker now recognizes supported ABI versions from the
533 EI_ABIVERSION field in the ELF header.
534 Implemented by Ulrich Drepper.
536 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
537 will not be used to fill in password fields in the passwd.byname replies.
538 Instead it is used to synthesize the shadow.byname table, should it be
539 missing. This is a useful mode in some installations involving Solaris.
540 Implemented by Ulrich Drepper.
542 * New locales: kok_IN, sq_MK, cv_RU
546 * The following bugs are resolved with this release:
548 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
549 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
550 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
551 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
552 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
553 10789, 10817, 10823, 10840, 10847
555 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
557 Implemented by Ulrich Drepper.
559 * Checking version of longjmp added that fails if an uninitialized stack
560 frame would be created. Implemented by Ulrich Drepper.
562 * STT_GNU_IFUNC is now supported in static executables.
563 Implemented by H.J. Lu.
565 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
567 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
568 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
569 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
570 Contributed by H.J. Lu.
572 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
573 Implemented by Ulrich Drepper.
575 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
577 Contributed by H.J. Lu.
579 * Support for fma instruction in AVX on x86-64.
580 Implemented by H.J. Lu and Ulrich Drepper.
582 * AVX support in x86-64 auditing support in ld.so.
583 Implemented by H.J. Lu.
585 * STB_GNU_UNIQUE support added.
586 Implemented by Ulrich Drepper.
588 * Implement second fallback mode for optimized DNS lookup for even more
589 broken environments. If two requests from the same port are not
590 handled correctly close the socket and open a new one before sending
591 the second request. The 'single-request-reopen' option in /etc/resolv.conf
592 can be used to select this mode right away, instead of rediscovering the
593 necessity is every process again.
594 Implemented by Ulrich Drepper.
596 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
597 Implemented by Adam Tkac.
599 * Optimized iconv conversions for S390x.
600 Implemented by Andreas Krebbel.
602 * Using condvars with PI mutexes is now more efficient due to kernel
603 support for requeueing to PI futexes. NPTL support added for x86-64.
604 Implemented by Ulrich Drepper.
606 * New locales: ps_AF, my_MM
610 * The following bugs are resolved with this release:
612 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
613 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
614 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
615 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
616 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
618 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
619 Implemented by Ulrich Drepper.
621 * New Linux interfaces: accept4, fallocate, fallocate64.
622 Implemented by Ulrich Drepper.
624 * Correct declarations of string function when used in C++ code. This
625 could lead to compile errors for invalid C++ code.
627 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
630 * New POSIX 2008 interface: psiginfo
631 Implemented by Ulrich Drepper.
633 * New ISO C++1x interfaces: quick_exit, at_quick_exit
634 Implemented by Ulrich Drepper.
636 * Support for selecting between multiple function definitions at runtime
637 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
639 * The libcrypt library can now use the hash function implementations in
640 NSS. Implemented by Ulrich Drepper.
642 * The malloc implementation can be compiled to be less memory efficient
643 but higher performing in multi-threaded programs.
644 Implemented by Ulrich Drepper.
646 * New locales: nan_TW@latin, ks_IN
648 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
649 Implemented by Ulrich Drepper.
651 * Extended printf hook support. It is possible to use user-defined types
652 and extend existing format specifiers.
653 Implemented by Ulrich Drepper.
655 * Handling for group shadow files has been added.
656 Implemented by Ulrich Drepper.
658 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
659 servers (the case, e.g., for some people using the built-in DNS
660 server in ADSL modems/routers). There is a once-per-process timeout
661 in case of a broken server. To avoid it, users can run nscd or put
662 'options single-request' in /etc/resolv.conf.
663 Implemented by Ulrich Drepper.
667 * The following bugs are resolved with this release:
669 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
670 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
671 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
672 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
673 6968, 6974, 6980, 6995, 7008, 7009, 7029
675 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
676 up at the same time. Implemented by Ulrich Drepper.
678 * TLS descriptors for LD and GD on x86 and x86-64.
679 Implemented by Alexandre Oliva.
681 * getaddrinfo now handles DCCP and UDPlite.
682 Implemented by Ulrich Drepper.
684 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
685 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
686 Implemented by Ulrich Drepper.
688 * New implementation of memmem, strstr, and strcasestr which is O(n).
689 Implemented by Eric Blake.
691 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
693 * Implement "e" option for popen to open file descriptor with the
694 close-on-exec flag set. Implemented by Ulrich Drepper.
696 * Implement "b" mode for fmemopen. In this mode writes writes don't
697 implicitly add a NUL byte and seeks from the end of the buffer really
698 use the buffer end, not the string length as the basis.
699 Implemented by Ulrich Drepper.
701 * Many functions, exported and internal, now atomically set the close-on-exec
702 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
704 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
706 Implemented by Pravin Satpute.
708 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
712 * The following bugs are resolved with this release:
714 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
715 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
716 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
717 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
718 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
719 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
720 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
722 * New locales: bo_CN, bo_IN, shs_CA.
724 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
726 * Sorting rules for some Indian languages (Devanagari and Gujarati).
727 Implemented by Pravin Satpute.
729 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
731 * nscd caches now all timeouts for DNS entries
732 Implemented by Ulrich Drepper.
734 * nscd is more efficient and wakes up less often.
735 Implemented by Ulrich Drepper.
737 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
738 vdprintf, and obstack_vprintf.
739 Implemented by Jakub Jelinek.
741 * Faster memset for x86-64.
742 Implemented by Harsha Jagasia and H.J. Lu.
744 * Faster memcpy on x86.
745 Implemented by Ulrich Drepper.
747 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
748 Implemented by Ulrich Drepper.
750 * Faster sqrt and sqrtf implemention for some PPC variants.
751 Implemented by Steven Munroe.
755 * The following bugs are resolved with this release:
757 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
758 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
759 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
760 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
761 5071, 5103, 5104, 5112, 5113, 5184, 5186
763 * More checking functions: fread, fread_unlocked, open*, mq_open.
764 Implemented by Jakub Jelinek and Ulrich Drepper.
766 * Extend fortification to C++. Implemented by Jakub Jelinek.
768 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
769 by not recognizing 'a' as a modifier when those specs are requested.
770 Implemented by Jakub Jelinek.
772 * PPC optimizations to math and string functions.
773 Implemented by Steven Munroe.
775 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
776 options to be passed. Implemented by Ulrich Drepper.
778 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
780 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
781 Implemented by Ulrich Drepper.
783 * Handle private futexes in the NPTL implementation.
784 Implemented by Jakub Jelinek and Ulrich Drepper.
786 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
787 Implemented by Roland McGrath and Ulrich Drepper.
789 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
791 * SHA-256 and SHA-512 based password encryption.
792 Implemented by Ulrich Drepper.
794 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
795 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
798 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
799 Implemented by Ulrich Drepper.
803 * The following bugs are resolved with this release:
805 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
806 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
807 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
808 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
809 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
810 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
811 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
814 * New Linux interfaces: epoll_pwait, sched_getcpu.
816 * New generic interfaces: strerror_l.
818 * nscd can now cache the services database. Implemented by Ulrich Drepper.
822 * The following bugs are resolved with this release:
824 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
825 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
826 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
827 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
828 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
829 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
830 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
831 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
832 3225, 3251, 3252, 3253, 3273
834 * For Linux, the sorting of addresses returned by getaddrinfo now also
835 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
836 Implemented by Ulrich Drepper.
838 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
839 Implemented by Ulrich Drepper.
841 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
843 * New iconv module for MIK. Contributed by Alexander Shopov.
845 * For sites with broken group and/or passwd database, the auto-propagate
846 option of nscd can prevent creating ID lookup entries from the results
847 of a name lookup and vice versa. This usually is no problem but some
848 site might have problems with the default behavior.
849 Implemented by Ulrich Drepper.
851 * Iterating over entire database in NIS can be slow. With the
852 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
853 to trade time for memory. The entire database will be read at once.
854 Implemented by Ulrich Drepper.
856 * The interfaces introduced in RFC 3542 have been implemented by
859 * Support for the new ELF hash table format was added by Ulrich Drepper.
861 * Support for priority inheritance mutexes added by Jakub Jelinek and
864 * Support for priority protected mutexes added by Jakub Jelinek.
866 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
867 or_IN, csb_PL, fy_NL, sr_ME.
871 * More overflow detection functions.
873 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
874 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
876 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
877 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
878 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
879 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
880 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
881 by Masahide Washizawa.
883 * It is now possible to install audit libraries for the dynamic linker using
884 LD_AUDIT. Implemented by Ulrich Drepper.
886 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
887 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
888 For a libc and libpthread that works well on Linux 2.4 kernels, we
889 recommend using the stable 2.3 branch.
891 * The new function open_wmemstream acts like open_memstream,
892 but uses a wchar_t wide character buffer.
894 * The new function ppoll is an improved version of poll, similar to pselect.
896 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
897 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
898 renameat, unlinkat, linkat, symlinkat, readlinkat.
900 * New Linux kernel system calls: unshare,
901 inotify_init, inotify_add_watch, inotify_rm_watch.
903 * The euidaccess function is now also known by the alias eaccess,
904 for compatibility with some other systems.
906 * Timezone data updated to 2006b version.
910 * The following bugs are resolved with this release:
912 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
913 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
914 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
915 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
916 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
917 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
919 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
921 * As of this release, GCC 4 can be used to compile the C Library.
923 * Timezone data updated to 2005m version.
927 * The following bugs are resolved with this release:
929 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
930 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
931 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
932 777, 787, 821, 822, 823, 825
934 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
938 * Support for RFC 3678. Real implementations exist only for Linux so far.
939 Implemented by Ulrich Drepper.
941 * nscd can now cache entries persistently. Expiring entries are reloaded.
942 For speedups the cache can be shared in memory with client processes.
943 Implemented by Ulrich Drepper.
945 * nscd can now perform SELinux checks.
946 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
948 * getaddrinfo queries are now cached. Canonical name lookup is performed
950 Implemented by Ulrich Drepper.
952 * The nothrow function attribute is used when headers are used by gcc when
953 compiling C code. This can avoid significant amounts of exception
956 * The malloc functions perform more error checking and are stricter when
957 it comes to reacting on errors. The default action is to terminate
958 the process after showing an error message. Implemented by Ulrich Drepper.
960 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
961 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
963 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
964 namespaces using the new function dlmopen(). This feature is of course,
965 like most other dynamic loading functionality, not available in statically
966 linked applications. Implemented by Ulrich Drepper.
968 * Low-overhead boundary checking variants of string and some stdio functions
969 were added. These are to be used in conjunction with a gcc patch by
970 Jakub Jelinek which adds calls to these functions if possible.
971 Implemented by Jakub Jelinek and Ulrich Drepper.
973 * Old code for several operating systems and machine architectures that
974 have not been in working condition in a long time have been removed from
975 the main source tree maintained by the GNU C Library's maintainers.
976 These files are now reside in the separate `ports' source module
977 that is usable as an add-on when building the library.
981 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
982 interrogate the dynamic linker, compatible with the Solaris interface.
984 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
985 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
987 * getifaddrs now uses the netlink interface on Linux to get its information.
988 Implemented by Thorsten Kukuk.
990 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
991 Implemented by Ulrich Drepper.
993 * support for non-executable stacks on x86 has been added. Changes mostly
996 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
999 * getaddrinfo now performs destination address selection according to
1004 * Thread-safe interfaces for many functions that access locale data
1005 were added in version 2.3, but these features were omitted from NEWS.
1006 Many functions have variants with an `_l' suffix that take a `locale_t'
1007 object as a parameter rather than consulting the current locale.
1008 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1009 create and maintain `locale_t' objects. Additionally, the new function
1010 `uselocale' sets "the current locale" (as used by functions not so
1011 parameterized) set for an individual thread. These features were added
1012 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1014 * The functions getresuid, getresgid, setresuid, and setresgid, which
1015 have long been available on Linux, are now declared in <unistd.h>
1016 and are now also available on the Hurd.
1018 * ELF thread-local storage support (TLS) now works on x86-64.
1020 * The new dynamic string token $LIB is expanded in shared library names.
1021 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1023 * Aldy Hernandez contributed complete software floating point support for
1024 PowerPC machines with no FPU.
1026 * fexecve is implemented on Linux.
1028 * The `btowc' function should work at least twice as fast due to
1029 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1031 * With approriate thread add-ons cancelable functions are now implemented
1032 in libc.so as well. No need to call the function in libpthread. This
1033 change allowed to finally disable the incorrect and expensive handling
1034 of weak definition in ld.so.
1036 * Yet more PLT entries in libc.so have been removed. We finally arrived
1037 at the bare minimum. Startup times improved appropriately.
1039 * Support for the new Linux/x86 system call interface was added. The
1040 AT_SYSINFO auxiliary vector entry is recognized and handled.
1044 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1047 * iconv (the program and the interface) now accepts empty names (excluding
1048 options like //TRANSLIT) to mean "use charset of current locale".
1050 * localedef can now transliterate characters in strings which are not in
1051 the provided charmap. The information from the input locale is used.
1053 * Prelinking support was added for ELF targets. This requires additional
1054 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1056 * Read-only stdio streams now use mmap to speed up operation by eliminating
1057 copying and buffer underflows. To use add 'm' to the mode string of
1058 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1060 * The malloc functions were completely rewritten by Wolfram Gloger based
1061 on Doug Lea's malloc-2.7.0.c.
1063 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1064 implementation of regex.
1066 * Bruno Haible upgraded the iconv and locale implementation to support
1069 * Contents of the LC_* and LANG environment variables in the CEN style are
1070 not recognized anymore. It never was used. Change by Ulrich Drepper.
1072 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1073 thread-local storage (TLS) ABI on some platforms.
1074 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1076 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1077 EUC-JISX0213, and TSCII.
1079 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1080 BSD-compatible interface for getting all network interface addresses.
1081 Implementation for IPv4 by Roland McGrath.
1083 * Loading of locale data is faster due to the introduction of a locale
1084 archive. Implemented by Roland McGrath and Ulrich Drepper.
1086 * Startup times are significantly reduced by not using exported functions
1087 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1090 * Steven Munroe contributed a port to PowerPC64/Linux.
1094 * The Hurd now uses the GNU libio implementation of stdio rather than the
1095 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1097 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1098 with the same behavior as the Linux system call of the same name.
1102 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1103 128-bit long double format.
1105 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1106 IBM1161, and IBM1162 charsets.
1108 * Andreas Jaeger contributed a port to x86-64/Linux.
1110 * Peter Bruin contributed a port to PowerPC/Hurd.
1112 * libc functions using I/O streams now can handle wide-oriented streams
1115 * optimizations in the dynamic linker. Binaries created by recent binutils
1116 versions start up quicker due to reduced time spent on relocations.
1118 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1122 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1123 asinh, atanh, j0 for the 128-bit long double format.
1125 * Bruno Haible updated all the code handling Unicode in some form to
1126 support Unicode 3.1.
1128 * Speed of regex for single-byte locales is back to previous levels.
1129 Patch by Isamu Hasegawa.
1131 * Alpha, SPARC, and IA-64 now also using floating stacks.
1133 * Startup time of internationalized applications greatly improved through
1134 iconv cache. Use iconvconfig to generate the cache file.
1135 Contributed by Ulrich Drepper.
1137 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1138 severe performance problems. Patch by David Mosberger.
1140 * The Hurd port got a lot more functionality like AIO, various stdio
1141 extensions, etc. Mainly done by Roland McGrath.
1143 * mtrace can now lookup symbols in shared libraries.
1147 * Intel's IA-64 math library is largely integrated. It provides fast and
1148 accurate implementatations for most basic and standard math functions
1149 in float, double, and long double format.
1151 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1152 and asin for the 96-bit long double format and asin, log, tan for the
1153 128-bit long double format.
1155 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1156 The basic double functions exist today. Contributed by Abraham Ziv
1157 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1158 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1160 * An asynchronous name lookup library was added. The interface is designed
1161 after POSIX AIO. The proposal was circulated beforehand to get comments.
1162 No negative ones came in. Implemented by Ulrich Drepper.
1164 * Port to S390/64bit contributed by Martin Schwidefsky
1165 <schwidefsky@de.ibm.com>.
1167 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1168 of functions for Linux/IA-64.
1170 * The RPC code is now thread safe. Threads can now use the same service
1171 of different services at the same time. Patch by Eric Norum
1172 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1174 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1175 family of functions for Linux/S390.
1177 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1178 of functions for Linux/x86.
1180 * Port to Linux/CRIS contributed by Axis Communications.
1184 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1185 we can now check for namespace violations and missing declarations. The
1186 result is that almost all headers are now Unix-compliant (as defined in
1187 the upcoming XPG6). The negative side is that some programs might need
1188 corrections, too, if they depend on the incorrect form of the headers in
1189 previous versions which defined too many symbols and included too many
1192 * regex now handles multibyte character sets correctly.
1193 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1195 * iconv (the program) does now conform to the upcoming XPG6 and handles
1196 charmaps. Instead of the charset names the path of charmaps can be
1197 provided and the conversion happens based on this data.
1198 Contributed by Ulrich Drepper.
1200 * The locale program now provides detailed information about the installed
1205 only lists the names of the supported locales
1209 provides details such as country, language, and codeset name.
1210 Contributed by Ulrich Drepper.
1214 * The gencat program now parses the input file according to the charset
1215 selected by the LC_CTYPE category. This is important for stateful
1216 character sets. To make generating catalogs easier there is a way
1217 to overwrite the charset selected by the locale: before the first
1218 message or $ quote line the catalog can contain a line like
1220 $ codeset=ISO-8859-2
1222 to select the charset (ISO-8859-2 in this case).
1224 Implemented by Shinya Hanataka and Ulrich Drepper.
1226 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1227 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1228 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1230 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1231 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1233 * The LANGUAGE environment variable is now ignored unless the locale is
1234 changed from the default "C" locale.
1236 * The usual bug fixes.
1240 * Greg McGary added runtime support for bounds checking using gcc's
1241 new -fbounded-pointers option. ix86 target is complete. PowerPC
1244 * Thorsten Kukuk added secure mode support to nscd.
1246 * The Berkeley db libraries have been removed.
1248 Related, the nss_db module is now in a separate package since it
1249 obviously requires a database library being available.
1251 * Wide character I/O streams implemented by Ulrich Drepper.
1253 * Functions from the extended socket API added by Ulrich Drepper.
1255 * Functions feenableexcept and fedisableexcept to control the
1256 behaviour of individual exceptions have been added by Andreas Jaeger.
1258 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1260 * The resolver code has been updated from bind 8.2.3-T5B which supports
1261 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1264 This change could in some situations effect backward compatibility. Since
1265 now `_res' is a thread-local instead of a global variable, modifying it
1266 in one thread does not have any effect in other threads.
1268 The resolver library was also extended to allow IPv6 as the transport
1269 protocol for the requests. This work was done by Stig Venaas.
1271 * Compatibility code for K&R C compilers has been removed from the
1272 header files. A ISO C compiler is needed to use the library
1273 (conforming to either C89 or C99 standard).
1275 * Complete rewrite of the localedef program to support multibyte character
1276 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1277 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1278 Implemented by Ulrich Drepper.
1280 Bruno Haible significantly improved the generation and use of the data
1281 structures for the wide character tables.
1283 * Plural handling in gettext implemented by Ulrich Drepper.
1285 * The utmp daemon has been removed.
1287 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1289 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1292 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1294 * POSIX barriers implemented by Kaz Kylheku.
1296 * POSIX spawn function family implemented by Ulrich Drepper.
1298 * POSIX spinlocks are now available.
1300 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1302 * the configure option --enable-kernel=X.Y.Z allows to strip out
1303 compatibility for kernel versions before X.Y.Z. This is currently only
1304 implemented for Linux.
1306 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1307 field sin6_scope_id. This means that all programs using IPv6 should be
1308 recompiled. Don't expect binary compatibility with previous glibc
1311 * various conversion modules for IBM character sets contributed by
1314 * IA-64 port by Jes Sorensen and HJ Lu.
1328 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1330 * New xdr functions are added; some rpc functions are now 64bit clean.
1332 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1334 * Fixed known incompatibilities with glibc 2.0.
1336 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1338 * Optimized a number of functions (especially the ELF dynamic loader).
1340 * Update timezone data files.
1342 * lots of charmaps corrections
1344 * some new locale definitions and charmaps
1349 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1350 conform to POSIX member type requirements. Symbol versions have been
1351 adjusted as needed within the library, and for direct use by applications,
1352 but there is potential for problems if third-party libraries use
1353 struct timeval as part of their interface. This does not present
1354 a problem for X and other "essential" system libraries.
1356 * An additional locale model to support C++ Standard Library locale
1357 model and probably more was implemented by Ulrich Drepper.
1359 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1362 * Miles Bader provided the `argp' function family to support hierachical
1363 command line argument parsing, layered on top of getopt.
1365 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1367 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1370 * scanf recognizes the %a and %A format for scanning floating point numbers.
1372 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1373 information and interfaces for the available integer types.
1375 * about 130 new math functions were added to implement the ISO C9x math
1378 * the new header <complex.h> contains definitions of the complex math
1379 functions from ISO C 9X.
1381 * the new header <tgmath.h> defines generic macros to use complex or
1382 real valued functions.
1384 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1386 * Andreas Jaeger provided a test suite for the math library.
1388 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1390 * Ulrich Drepper added character set conversion functions (iconv).
1392 * Optimized string functions have been added.
1394 * The localedata addon is now part of glibc.
1396 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1398 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1399 daemon for NSS (nscd).
1401 Missing a better place here are some numbers on improvements. Under
1402 Linux 2.1.125 un-tar-ing the kernel sources takes
1406 using local files 12.19s 6.88s 22.91s
1408 using NIS 13.92s 8.91s 26.34s
1410 using NIS & nscd 10.37s 7.34s 25.30s
1412 using NIS+ 27.57s 30.37s 640.46s
1414 using NIS+ & nscd 10.25s 7.83s 26.51s
1416 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1418 Keep in mind that non-namelookup related operations dominate above times.
1419 It was just a common complain that using NIS+ unpacking the kernel is
1422 [1] The old nscd implementation is not available anymore since it was
1423 distributed with glibc up to version 2.0.98 and thus is now replaced.
1425 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1427 * Mark Kettenis provided a Hesiod NSS module.
1429 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1430 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1432 * rcmd can now handle netgroups (Dick Streefland).
1434 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1437 * Support for the IPv6 protocol has been added to the socket API, as per the
1438 latest draft standards.
1440 * Support for Linux 2.2 has been added.
1442 * Interface changes relative to the latest 2.0.x release:
1443 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1444 addseverity NEW: Unix98
1445 alphasort64 NEW: LFS
1446 argp_err_exit_status NEW: argp, GNU ext
1447 argp_error NEW: argp, GNU ext
1448 argp_failure NEW: argp, GNU ext
1449 argp_help NEW: argp, GNU ext
1450 argp_parse NEW: argp, GNU ext
1451 argp_program_bug_address NEW: argp, GNU ext
1452 argp_program_version NEW: argp, GNU ext
1453 argp_program_version_hook NEW: argp, GNU ext
1454 argp_state_help NEW: argp, GNU ext
1455 argp_usage NEW: argp, GNU ext
1456 authdes_create NEW: Secure RPC
1457 authdes_getucred NEW: Secure RPC
1458 authdes_pk_create NEW: Secure RPC
1459 backtrace NEW: GNU ext.
1460 backtrace_symbols NEW: GNU ext.
1461 backtrace_symbols_fd NEW: GNU ext.
1463 cacosf NEW: ISO C 9x
1464 cacosh NEW: ISO C 9x
1465 cacoshf NEW: ISO C 9x
1466 cacoshl NEW: ISO C 9x
1467 cacosl NEW: ISO C 9x
1474 casinf NEW: ISO C 9x
1475 casinh NEW: ISO C 9x
1476 casinhf NEW: ISO C 9x
1477 casinhl NEW: ISO C 9x
1478 casinl NEW: ISO C 9x
1480 catanf NEW: ISO C 9x
1481 catanh NEW: ISO C 9x
1482 catanhf NEW: ISO C 9x
1483 catanhl NEW: ISO C 9x
1484 catanl NEW: ISO C 9x
1485 cbc_crypt NEW: Secure RPC
1489 ccoshf NEW: ISO C 9x
1490 ccoshl NEW: ISO C 9x
1496 cimagf NEW: ISO C 9x
1497 cimagl NEW: ISO C 9x
1498 clearerr_locked REMOVED
1499 clntunix_create NEW: sunrpc ext
1501 clog10 NEW: ISO C 9x
1502 clog10f NEW: ISO C 9x
1503 clog10l NEW: ISO C 9x
1513 cprojf NEW: ISO C 9x
1514 cprojl NEW: ISO C 9x
1516 crealf NEW: ISO C 9x
1517 creall NEW: ISO C 9x
1522 csinhf NEW: ISO C 9x
1523 csinhl NEW: ISO C 9x
1526 csqrtf NEW: ISO C 9x
1527 csqrtl NEW: ISO C 9x
1531 ctanhf NEW: ISO C 9x
1532 ctanhl NEW: ISO C 9x
1534 des_setparity NEW: Secure RPC
1535 ecb_crypt NEW: Secure RPC
1536 endutxent NEW: Unix98
1538 exp10f NEW: ISO C 9x
1539 exp10l NEW: ISO C 9x
1543 fattach NEW: STREAMS
1544 fdetach NEW: STREAMS
1548 feclearexcept NEW: ISO C 9x
1549 fegetenv NEW: ISO C 9x
1550 fegetexceptflag NEW: ISO C 9x
1551 fegetround NEW: ISO C 9x
1552 feholdexcept NEW: ISO C 9x
1554 feraiseexcept NEW: ISO C 9x
1555 ferror_locked REMOVED
1556 fesetenv NEW: ISO C 9x
1557 fesetexceptflag NEW: ISO C 9x
1558 fesetround NEW: ISO C 9x
1559 fetestexcept NEW: ISO C 9x
1560 feupdateenv NEW: ISO C 9x
1561 fflush_locked REMOVED
1565 fgets_unlocked NEW: GNU ext.
1566 fileno_locked REMOVED
1578 fputc_locked REMOVED
1579 fputs_unlocked NEW: GNU ext.
1580 fread_unlocked NEW: GNU ext.
1585 fstatvfs NEW: Unix98
1589 ftruncate64 NEW: LFS
1591 fwrite_unlocked NEW: GNU ext.
1592 gai_strerror NEW: IPv6
1596 getchar_locked REMOVED
1598 getdate_err NEW: Unix98
1599 getdate_r NEW: GNU ext.
1601 getnameinfo NEW: IPv6
1602 getnetname NEW: Secure RPC
1603 getpmsg NEW: STREAMS
1604 getpt NEW: Unix98 PTY
1605 getrlimit64 NEW: LFS
1606 getutxent NEW: Unix98
1607 getutxid NEW: Unix98
1608 getutxline NEW: Unix98
1609 glob64 NEW: GNU ext.
1610 globfree64 NEW: GNU ext.
1611 gnu_get_libc_release NEW: GNU ext.
1612 gnu_get_libc_version NEW: GNU ext.
1613 grantpt NEW: Unix98 PTY
1614 host2netname NEW: Secure RPC
1616 iconv_close NEW: iconv
1617 iconv_open NEW: iconv
1618 if_freenameindex NEW: IPv6
1619 if_indextoname NEW: IPv6
1620 if_nameindex NEW: IPv6
1621 if_nametoindex NEW: IPv6
1622 in6addr_any NEW: IPv6
1623 in6addr_loopback NEW: IPv6
1624 inet6_isipv4mapped NEW: IPv6
1625 isastream NEW: STREAMS
1626 iswblank NEW: GNU ext.
1627 key_decryptsession NEW: Secure RPC
1628 key_decryptsession_pk NEW: Secure RPC
1629 key_encryptsession NEW: Secure RPC
1630 key_encryptsession_pk NEW: Secure RPC
1631 key_gendes NEW: Secure RPC
1632 key_get_conv NEW: Secure RPC
1633 key_secretkey_is_set NEW: Secure RPC
1634 key_setnet NEW: Secure RPC
1635 key_setsecret NEW: Secure RPC
1636 llrint NEW: ISO C 9x
1637 llrintf NEW: ISO C 9x
1638 llrintl NEW: ISO C 9x
1639 llround NEW: ISO C 9x
1640 llroundf NEW: ISO C 9x
1641 llroundl NEW: ISO C 9x
1646 lrintf NEW: ISO C 9x
1647 lrintl NEW: ISO C 9x
1648 lround NEW: ISO C 9x
1649 lroundf NEW: ISO C 9x
1650 lroundl NEW: ISO C 9x
1652 makecontext NEW: Unix98
1653 mempcpy NEW: GNU ext.
1656 modify_ldt NEW: kernel
1660 nearbyint NEW: ISO C 9x
1661 nearbyintf NEW: ISO C 9x
1662 nearbyintl NEW: ISO C 9x
1663 netname2host NEW: Secure RPC
1664 netname2user NEW: Secure RPC
1665 nexttoward NEW: ISO C 9x
1666 nexttowardf NEW: ISO C 9x
1667 nexttowardl NEW: ISO C 9x
1671 passwd2des NEW: Secure RPC
1673 pow10f NEW: GNU ext.
1674 pow10l NEW: GNU ext.
1677 printf_size NEW: GNU ext.
1678 printf_size_info NEW: GNU ext.
1679 profil_counter REMOVED
1680 pthread_mutexattr_getkind_np REPLACED
1681 pthread_mutexattr_setkind_np REPLACED
1682 ptsname NEW: Unix98 PTY
1683 ptsname_r NEW: Unix98 PTY
1685 putchar_locked REMOVED
1686 putgrent NEW: GNU ext.
1688 putpmsg NEW: STREAMS
1689 pututxline NEW: Unix98
1693 readdir64_r NEW: LFS
1694 remquo NEW: ISO C 9x
1695 remquof NEW: ISO C 9x
1696 remquol NEW: ISO C 9x
1698 roundf NEW: ISO C 9x
1699 roundl NEW: ISO C 9x
1701 scalbln NEW: ISO C 9x
1702 scalblnf NEW: ISO C 9x
1703 scalblnl NEW: ISO C 9x
1705 sendfile NEW: kernel
1706 setcontext NEW: Unix98
1707 setrlimit64 NEW: LFS
1708 setutxent NEW: Unix98
1710 sigignore NEW: Unix98
1711 sigqueue NEW: POSIX.1b
1712 sigrelse NEW: Unix98
1713 sigset NEW: POSIX.1b
1714 sigtimedwait NEW: POSIX.1b
1715 sigwaitinfo NEW: POSIX.1b
1716 sincos NEW: GNU ext.
1717 sincosf NEW: GNU ext.
1718 sincosl NEW: GNU ext.
1722 strcasestr NEW: GNU ext.
1723 strtoimax NEW: ISO C 9x
1724 strtoumax NEW: ISO C 9x
1725 strverscmp NEW: GNU ext.
1726 svcauthdes_stats NEW: Secure RPC
1727 svcunix_create NEW: sunrpc etx
1728 svcunixfd_create NEW: sunrpc ext
1729 swapcontext NEW: Unix98
1730 tcgetsid NEW: Unix98 PTY
1731 tdestroy NEW: GNU ext.
1732 tgamma NEW: ISO C 9x
1733 tgammaf NEW: ISO C 9x
1734 tgammal NEW: ISO C 9x
1738 truncf NEW: ISO C 9x
1739 truncl NEW: ISO C 9x
1741 unlockpt NEW: Unix98 PTY
1742 updwtmpx NEW: Unix98
1743 user2netname NEW: Secure RPC
1744 utmpxname NEW: Unix98
1745 versionsort NEW: GNU ext.
1746 versionsort64 NEW: GNU ext.
1748 wcscasecmp NEW: GNU ext.
1749 wcsncasecmp NEW: GNU ext.
1750 wcsnlen NEW: GNU ext.
1751 wcstoimax NEW: ISO C 9x
1752 wcstoll NEW: ISO C 9x
1753 wcstoull NEW: ISO C 9x
1754 wcstoumax NEW: ISO C 9x
1756 wordexp NEW: POSIX.2
1757 wordfree NEW: POSIX.2
1758 write_profiling REMOVED
1759 xdecrypt NEW: Secure RPC
1760 xdr_authdes_cred NEW: Secure RPC
1761 xdr_authdes_verf NEW: Secure RPC
1762 xdr_cryptkeyarg NEW: Secure RPC
1763 xdr_cryptkeyarg2 NEW: Secure RPC
1764 xdr_cryptkeyres NEW: Secure RPC
1765 xdr_getcredres NEW: Secure RPC
1766 xdr_key_netstarg NEW: Secure RPC
1767 xdr_key_netstres NEW: Secure RPC
1768 xdr_keybuf NEW: Secure RPC
1769 xdr_keystatus NEW: Secure RPC
1770 xdr_netnamestr NEW: Secure RPC
1771 xdr_sizeof NEW: Secure RPC
1772 xdr_unixcred NEW: sunrpc ext
1773 xencrypt NEW: Secure RPC
1774 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1785 * inet_ntoa is thread-safe
1787 * updwtmp is moved from libutil to libc
1789 * rewrite of cbrt function
1791 * update of timezone data
1805 * add atoll function
1807 * fix complex problems in Berkeley DB code
1809 * fix math functions
1813 * fixed lots of header problems (especially Linux/GNU specific)
1815 * dynamic loader preserves all registers
1817 * Roland McGrath provided support for handling of auxiliary objects in
1818 the ELF dynamic loader.
1820 * support for parallel builds is improved
1824 * GNU extensions are no longer declared by default. To enable them you
1825 must define the macro `_GNU_SOURCE' in your program or compile with
1828 * The library has changed from using GNU ld symbol aliases to using weak
1829 symbols where available. The ELF object file format supports weak
1830 symbols; GNU ld also supports weak symbols in the a.out format. (There
1831 is also now support for other GNU ld extensions in ELF. Use the
1832 `--with-elf' option to configure to indicate you have ELF, and
1833 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1834 of many files which contained only symbol aliases, reducing the size of
1835 the source and the compiled library; many other files were renamed to
1836 less cryptic names previously occupied by the symbol alias files.
1837 There is a new header file <elf.h> for programs which operate on
1838 files in the ELF format.
1840 * Converted to Autoconf version 2, so `configure' has more options.
1841 Run `configure --help' to see the details.
1843 * The library can now be configured to build profiling, highly-optimized
1844 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1845 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1846 `configure' enable building these extra libraries. The shared library is
1847 built by default when using both ELF and GNU ld. When shared libraries
1848 are enabled, the new library `-ldl' is available for arbitrary run-time
1849 loading of shared objects; its interface is defined in <dlfcn.h>. The
1850 new header file <link.h> gives access to the internals of the run-time
1851 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1852 application of same name on other systems and it provides information
1853 about dynamically linked binaries.
1855 * The C library now provides the run-time support code for profiling
1856 executables compiled with `-pg'. Programs can control the profiling code
1857 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1858 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1859 the support for this file format was contributed by David Mosberger-Tang.
1861 * The math code has been replaced with a math library based on fdlibm from
1862 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1863 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1864 functions. The math functions now reside in a separate library, so
1865 programs using them will need to use `-lm' their linking commands.
1867 * John C. Bowman contributed optimized ix87 assembler inline functions.
1869 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1870 mechanism similar to that found in Solaris 2. This is now used for the
1871 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1872 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1873 file controls what services are used for each individual database. This
1874 works by loading shared libraries with names specified in `nsswitch.conf',
1875 so service modules can be changed or added at any time without even
1876 relinking any program. Currently there are the file, db, and NIS based
1877 NSS services available.
1879 * The new functions `strtoq' and `strtouq' parse integer values from
1880 strings, like `strtol' and `strtoul', but they return `long long int' and
1881 `unsigned long long int' values, respectively (64-bit quantities).
1883 * The new functions `strtof' and `strtold' parse floating-point values from
1884 strings, like `strtod', but they return `float' and `long double' values,
1885 respectively (on some machines `double' and `long double' are the same).
1887 * Ulrich Drepper has contributed new implementations of the floating-point
1888 printing and reading code used in the `printf' family of functions and
1889 `strtod', `strtof', and `strtold'. These new functions are perfectly
1890 accurate, and much faster than the old ones.
1892 * The implementation of the POSIX locale model was completely rewritten by
1893 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1894 to compile the POSIX locale definition.
1896 * The former dummy implementations of the strcoll and strxfrm function are
1897 now replaced by fully functional code contributed by Ulrich Drepper. The
1898 collation information comes from the POSIX locale definitions.
1900 * The new header <langinfo.h> defines an interface for accessing
1901 various locale-dependent data (using the locale chosen with `setlocale').
1903 * Ulrich Drepper has contributed a new suite of functions for operation on
1904 wide-character and multibyte-character strings, in <wchar.h>;
1905 and classification and case conversion of wide characters, in <wctype.h>.
1906 These new functions are conforming to the ISO C, Amendement 1 specification.
1908 * There is now a second implementation of the standard I/O library available.
1909 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1910 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1912 * You can now use positional parameter specifications in format strings
1913 for the `printf' and `scanf' families of functions. For example,
1914 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1915 ``Number 6, Mr Jones''. This is mainly useful when providing different
1916 format strings for different languages, whose grammars may dictate
1917 different orderings of the values being printed. To support this
1918 feature, the interface for `register_printf_handler' has changed; see
1919 the header file <printf.h> for details.
1921 * The `printf' and `scanf' families of functions now understand a new
1922 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1923 to group numbers as indicated by the locale; for `scanf' and friends, this
1924 says to accept as valid only a number with all the proper grouping
1925 separators in the right places. In the default "C" locale, numbers are
1926 not grouped; but locales for specific countries will define the usual
1927 conventions (i.e. separate thousands with `,' in the US locale).
1929 * The pgrp functions have been regularized, slightly incompatibly but much
1930 less confusingly. The core functions are now `getpgid' and `setpgid',
1931 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1932 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1933 provided for compatibility. There is no longer an incompatible `getpgrp'
1934 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1936 * The new header file <fts.h> and suite of functions simplify programs that
1937 operate on directory trees. This code comes from 4.4 BSD.
1939 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1940 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1941 NSS scheme used in glibc.
1943 * There is a new malloc debugging hook `__memalign_hook'.
1945 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1946 `unsigned int' in <sys/types.h>. These are for compatibility only and
1947 their use is discouraged.
1949 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1950 done differently, so that it works even without GNU ld.
1952 * New function `euidaccess' checks allowed access to a file like `access',
1953 but using the effective IDs instead of the real IDs.
1955 * The time zone data files have been updated for the latest and greatest
1956 local time conventions of the countries of the world.
1958 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1961 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1962 for formatting floating-point numbers. They are provided only for
1963 compatibility; new programs should use `sprintf' instead. There are
1964 also equivalent function for the `long double' floating-point type and
1965 all functions also exist in a reentrant form.
1967 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1968 functions for maintaining the login-record files (primarily of use to
1969 system programs such as `login'), and convenient functions for
1970 allocating and initializing a pseudo-terminal (pty) device.
1972 * Ulrich Drepper has contributed new support for System V style
1973 shared memory and IPC on systems that support it.
1975 * Ulrich Drepper has contributed several miscellaneous new functions found
1976 in System V: The `hsearch' family of functions provide an effective
1977 implementation of hash tables; `a64l' and `l64a' provide a very simple
1978 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1981 * Ulrich Drepper has contributed new reentrant counterparts for the
1982 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1984 * Ulrich Drepper has contributed new, highly-optimized versions of several
1985 string functions for the i486/Pentium family of processors.
1987 * Ulrich Drepper has updated the Linux-specific code, based largely
1988 on work done in Hongjiu Lu's version of GNU libc for Linux.
1989 The GNU library now supports Linux versions 2.0.10 and later,
1990 using the ELF object file format (i[3456]86-*-linux).
1992 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1994 * David Mosberger-Tang and Richard Henderson have ported the C library
1995 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1996 dynamic linking support for ELF/Alpha.
1998 * Richard Henderson contributed several Alpha optimized assembler function
1999 for arithmetic and string handling.
2001 * Ulrich Drepper has contributed a new set of message catalog functions to
2002 support multiple languages using the <libintl.h> interface, for use with
2003 his new package GNU gettext. Translation volunteers have contributed
2004 catalogs of the library's messages in Spanish, German, and Korean.
2006 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2007 program and the `catgets' function for reading the catalog files it
2008 creates. (The <libintl.h> interface is preferred; we include the
2009 <nl_types.h> interface using `catgets' only for source compatibility with
2010 programs already written to use it.)
2012 * New header file <values.h> gives SVID-compatible names for <limits.h>
2015 * Various new macros, declarations, and small header files for compatibility
2018 * New function `group_member' is a convenient way to check if a process has
2019 a given effective group ID.
2021 * When using GCC 2.7 and later, the socket functions are now declared in a
2022 special way so that passing an argument of type `struct sockaddr_in *',
2023 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2024 `struct sockaddr *' type, does not generate a type-clash warning.
2026 * New function `error' declared in header file <error.h> is a convenient
2027 function for printing error messages and optionally exiting; this is the
2028 canonical function used in GNU programs. The new functions `err', `warn',
2029 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2030 doing the same thing.
2032 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2033 POSIX.2 `glob' function to do ~ and {...} expansion.
2035 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2036 `clearenv' which is used in POSIX.9 is also available.
2038 * New function `getsid' returns session ID number on systems that support it.
2040 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2041 files <db.h> and <mpool.h> provide a rich set of functions for several
2042 types of simple databases stored in memory and in files, and <ndbm.h> is
2043 an old `ndbm'-compatible interface using the `db' functions. Link with
2044 `-ldb' to get these functions.
2046 * New macro `strdupa' copies a string like `strdup', but uses local stack
2047 space from `alloca' instead of dynamic heap space from `malloc'.
2049 * New function `strnlen' is like `strlen' but searches only a given maximum
2050 number of characters for the null terminator. `stpncpy', `strndup' and
2051 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2054 * New function `statfs' in header <sys/statfs.h>.
2056 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2057 provide convenient functions for operating on blocks of null-terminated
2060 * A new suite of functions in <utmp.h> handle all the details of reading
2061 and writing the utmp file.
2063 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2066 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2067 completely POSIX compliant and also implemented the extended functionality
2068 to handle alternate digit representation and alternate era date formats.
2070 * Ulrich Drepper provided an implementation of the `strptime' function
2071 defined in XPG4.2 which transforms a string into a `struct tm' value.
2073 * Paul Eggert provided the tzselect shell script as part of the timezone
2074 code. The shell script makes it easy to select the correct timezone
2077 * The implementation of the malloc family of functions is completely replaced
2078 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2079 The implementation uses the mmap function (if available) and it is
2080 optimized for the use in multi threaded programs.
2082 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2083 functions. This new functionality is usable by specifying a special
2084 salt string and it is compatible with implementation on *BSD systems.
2086 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2087 `getsubopt' to handle second level command line options, `bsd_signal'
2088 to access BSD style `signal' functionality, the obsolete `regexp' style
2091 * the `lchown' function is available on system which support this
2094 * The implementation of the shadow password handling function was contributed
2097 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2099 * POSIX.1g support was added. The <sys/select.h> header is available,
2100 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2101 implementation of `getaddrinfo'.
2105 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2107 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2108 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2110 * The new function `daemon' from 4.4 BSD is useful for server programs that
2111 want to put themselves in the background.
2113 * Joel Sherrill has contributed support for several standalone boards that
2114 run without an operating system.
2116 * `printf', `scanf' and friends now accept a `q' type modifier for long
2117 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2119 * All of the code taken from BSD (notably most of the math and networking
2120 routines) has been updated from the BSD 4.4-Lite release.
2122 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2124 * The new functions `getdomainname' and `setdomainname' fetch or change the
2125 YP/NIS domain name. These are system calls which exist on systems which
2128 * The time zone data files have been updated for the latest international
2131 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2132 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2136 * The C library now includes support for Sun RPC, from Sun's free
2137 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2138 are included. (There is still no support for YP.)
2140 * Tom Quinn has contributed a port of the C library to SGI machines running
2141 Irix 4 (mips-sgi-irix4).
2143 * The new `lockf' function is a simplified interface to the locking
2144 facilities of `fcntl', included for compatibility.
2146 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2148 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2150 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2153 * The error message printed by `assert' for a failed assertion now includes
2154 the name of the program (if using GNU ld) and the name of the calling
2155 function (with versions of GCC that support this).
2157 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2159 * The library now includes the <sys/mman.h> header file and memory
2160 management functions `mmap', `munmap', `mprotect', `msync', and
2161 `madvise', on systems that support those facilities.
2163 * The interface for `mcheck' has changed slightly: the function called to
2164 abort the program when an allocation inconsistency is detected now takes
2165 an argument that indicates the type of failure. The new function
2166 `mprobe' lets you request a consistency check for a particular block at
2167 any time (checks are normally done only when you call `free' or `realloc'
2170 * It is now possible to easily cross-compile the C library, building on one
2171 system a library to run on another machine and/or operating system. All
2172 you need to do is set the variable `HOST_CC' in `configparms' to the
2173 native compiler for programs to run on the machine you are building on (a
2174 few generator programs are used on Unix systems); set `CC' to the
2177 * The new function `fexecve' (only implemented on the GNU system) executes
2178 a program file given a file descriptor already open on the file.
2182 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2183 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2185 * You can set the variable `libprefix' in `configparms' to specify a prefix
2186 to be prepended to installed library files; this makes it easy to install
2187 the GNU C library to be linked as `-lgnuc' or whatever.
2189 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2190 copies a limited number of characters from a string, and returns the
2191 address of the last character written.
2193 * You no longer need to check for whether the installed `stddef.h' is
2194 compatible with the GNU C library. configure now checks for you.
2196 * You can now define a per-stream `fileno' function to convert the
2197 stream's cookie into an integral file descriptor.
2199 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2200 allocates zero bytes of storage, and returns a unique pointer which
2201 you can pass to `realloc' or `free'. The behavior is undefined if
2202 you dereference this pointer.
2204 * The C library now runs on Sony NEWS m68k machines running either
2205 NewsOS 3 or NewsOS 4.
2207 * The new `syscall' function is a system-dependent primitive function
2208 for invoking system calls. It has the canonical behavior on Unix
2209 systems, including unreliable return values for some calls (such as
2210 `pipe', `fork' and `getppid').
2212 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2213 to `EAGAIN', which is the preferred name. On systems whose kernels
2214 use two distinct codes, the C library now translates EWOULDBLOCK to
2215 EAGAIN in every system call function.
2219 * The GNU C Library Reference Manual is now distributed with the library.
2220 `make dvi' will produce a DVI file of the printed manual.
2221 `make info' will produce Info files that you can read on line using C-h i
2222 in Emacs or the `info' program.
2223 Please send comments on the manual to bug-glibc-manual@gnu.org.
2225 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2227 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2229 * Jason Merrill has contributed a port to the Sequent Symmetry running
2230 Dynix version 3 (i386-sequent-dynix).
2232 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2233 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2235 * New function `memory_warnings' lets you arrange to get warnings when
2236 malloc is running out of memory to allocate, like Emacs gives you.
2238 * The C library now contains the relocating allocator used in Emacs 19 for
2239 its editing buffers. This allocator (ralloc) minimizes allocation
2240 overhead and fragmentation by moving allocated regions around whenever it
2241 needs to. You always refer to a ralloc'd region with a "handle" (a
2242 pointer to a pointer--an object of type `void **').
2244 * There is a new `printf' format: `%m' gives you the string corresponding
2245 to the error code in `errno'.
2247 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2248 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2249 pass, the `a' modifier says to fill in a `char **' you pass with a
2252 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2253 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2254 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2256 * `mkstemp' is a traditional Unix function to atomically create and open a
2257 uniquely-named temporary file.
2261 * The standard location for the file that says what the local timezone is
2262 has changed again. It is now `/usr/local/etc/localtime' (or more
2263 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2265 * The distribution no longer contains any files with names longer than 14
2268 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2269 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2271 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2275 * The configuration process has changed quite a bit. The `configure'
2276 script is now used just like the configuration scripts for other GNU
2277 packages. The `sysdeps' directory hierarchy is much rearranged.
2278 The file `INSTALL' explains the new scheme in detail.
2280 * The header files no longer need to be processed into ANSI C and
2281 traditional C versions. There is just one set of files to install, and
2282 it will work with ANSI or old C compilers (including `gcc -traditional').
2284 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2285 MIPS DECStation running Ultrix 4.
2287 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2288 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2289 made itself into a shared library.
2291 * Yet further improved support for the i386, running 4.3 BSD-like systems
2292 (such as Mach 3 with the Unix single-server), or System V.
2294 * New function `strncasecmp' to do case-insensitive string comparison
2295 with limited length.
2297 * New function `strsep' is a reentrant alternative to `strtok'.
2299 * New functions `scandir' and `alphasort' for searching directories.
2301 * New function `setenv' is a better interface to `putenv'.
2303 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2304 function for traversing a directory tree.
2306 * The GNU obstack package is now also part of the C library.
2307 The new function `open_obstack_stream' creates a stdio stream that
2308 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2309 formatted output directly to an obstack.
2311 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2312 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2314 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2316 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2317 things to your strings.
2319 * There are some new test programs: test-fseek, testmb, and testrand.
2321 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2322 These ports are not finished, but are a good starting place for really
2323 supporting those systems.
2325 * `/etc/localtime' is now the standard location for the file that says what
2326 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2327 This follows the general principle that `/etc' is the place for all local
2328 configuration files.
2330 * The C library header files now use `extern "C"' when used by the C++
2331 compiler, so the C library should now work with C++ code.
2333 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2334 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2337 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2338 function which uses the `merge sort' algorithm, and is said to be
2339 significantly faster than the old GNU `qsort' function. Merge sort is
2340 now the standard `qsort' function. The new algorithm can require a lot
2341 of temporary storage; so, the old sorting function is called when the
2342 required storage is not available.
2344 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2345 provides the Unix `crypt' function, plus some other entry points.
2347 * The code and header files taken from 4.4 BSD have been updated with the
2348 latest files released from Berkeley.
2350 ----------------------------------------------------------------------
2351 Copyright information:
2353 Copyright (C) 1992-2013 Free Software Foundation, Inc.
2355 Permission is granted to anyone to make or distribute verbatim copies
2356 of this document as received, in any medium, provided that the
2357 copyright notice and this permission notice are preserved,
2358 thus giving the recipient permission to redistribute in turn.
2360 Permission is granted to distribute modified versions
2361 of this document, or of portions of it,
2362 under the above conditions, provided also that they
2363 carry prominent notices stating who last changed them.
2366 version-control: never
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