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, 13982, 13985, 14155, 14547, 14699, 15048, 15362, 15400, 15427,
13 15522, 15531, 15532, 15608, 15609, 15610, 15632, 15640, 15680, 15681,
14 15723, 15734, 15735, 15736, 15748, 15749, 15754, 15760, 15797, 15844,
15 15849, 15855, 15856, 15857, 15859, 15867, 15886, 15887, 15890, 15892,
16 15893, 15895, 15897, 15905, 15909, 15919, 15921, 15923, 15939, 15963,
17 15966, 15988, 16032, 16034.
19 * CVE-2012-4412 The strcoll implementation caches indices and rules for
20 large collation sequences to optimize multiple passes. This cache
21 computation may overflow for large collation sequences and may cause a
22 stack or buffer overflow. This is now fixed to use a slower algorithm
23 which does not use a cache if there is an integer overflow.
25 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
26 rules for large collation sequences to optimize multiple passes and falls
27 back to alloca if malloc fails, resulting in a possible stack overflow.
28 The implementation now falls back to an uncached collation sequence lookup
31 * CVE-2013-4788 The pointer guard used for pointer mangling was not
32 initialized for static applications resulting in the security feature
33 being disabled. The pointer guard is now correctly initialized to a
34 random value for static applications. Existing static applications need
35 to be recompiled to take advantage of the fix (bug 15754).
37 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
38 to the d_name member of struct dirent, or omit the terminating NUL
39 character. (Bugzilla #14699).
41 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
42 aligned_alloc functions could allocate too few bytes or corrupt the
43 heap when passed very large allocation size values (Bugzilla #15855,
46 * New locales: ak_GH, cmn_TW, hak_TW, lzh_TW, nan_TW, quz_PE, pap_AW, pap_CW,
49 * Substantially revised locales: gd_GB, ht_HT
51 * The LC_ADDRESS field was updated to support country_car for almost all
54 * ISO 1427 definitions were updated.
56 * ISO 3166 definitions were updated.
58 * The localedef utility now supports --big-endian and --little-endian
59 command-line options to generate locales for a different system from that
60 for which the C library was built.
62 * The configure option --disable-versioning has been removed. Builds with
63 --disable-versioning had not worked for several years.
65 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
66 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
68 * SystemTap probes for malloc have been introduced.
70 * Support for powerpc64le has been added.
74 * The following bugs are resolved with this release:
76 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
77 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
78 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
79 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
80 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
81 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
82 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
83 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
84 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
85 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
86 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
87 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
88 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
91 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
92 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
93 Distributions can re-enable building and using pt_chown via the new configure
94 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
95 considerable security risks and should only be used if the distribution
96 understands and accepts the risks.
98 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
101 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
102 fixed (Bugzilla #15330).
104 * Add support for calling C++11 thread_local object destructors on thread
105 and program exit. This needs compiler support for offloading C++11
106 destructor calls to glibc.
108 * Improved worst case performance of libm functions with double inputs and
111 * Support for priority inherited mutexes in pthread condition variables on
112 non-x86 architectures.
114 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
116 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
118 * Optimized string functions for ARM. Implemented by Will Newton and
121 * Optimized libm functions for SPARC. Implemented by David S. Miller.
123 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
126 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
127 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
129 * Added a benchmark framework to track performance of functions in glibc.
131 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
132 It is based on draft TS 18661 and currently enabled as a GNU extension.
134 * On Linux, the clock function now uses the clock_gettime system call
135 for improved precision, rather than old times system call.
137 * Added new API functions pthread_getattr_default_np and
138 pthread_setattr_default_np to get and set the default pthread
139 attributes of a process.
141 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
142 This may improve lock scaling of existing programs on TSX capable systems.
143 When the --enable-lock-elision=yes parameter is specified at configure
144 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
147 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
148 availability). Implemented by Ryan S. Arnold.
150 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
154 * The following bugs are resolved with this release:
156 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
157 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
158 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
159 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
160 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
161 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
162 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
163 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
164 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
165 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
166 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
167 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
168 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
169 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
170 14879, 14889, 14893, 14898, 14914.
172 * Optimization of memcpy for MIPS.
174 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
175 EMFILE has been fixed (Bugzilla #14889).
177 * The add-on ports collection is now distributed in the "ports" subdirectory
178 of the main GNU C Library distribution, rather than separately.
180 * Port to ARM AArch64 contributed by Linaro.
182 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
183 Optimized versions of memcpy, memset, and memcmp added for System z10 and
185 Implemented by Andreas Krebbel.
187 * The new function secure_getenv allows secure access to the environment,
188 returning NULL if running in a SUID/SGID process. This function replaces
189 the internal function __secure_getenv.
191 * SystemTap static probes have been added into the dynamic linker.
192 Implemented by Gary Benson.
194 * Optimizations of string functions strstr, strcasestr and memmem.
195 Implemented by Maxim Kuvyrkov.
197 * The minimum Linux kernel version that this version of the GNU C Library
198 can be used with is 2.6.16.
200 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
201 powerpc POWER7. Implemented by Will Schmidt.
203 * New configure option --disable-nscd builds the C library such that it
204 never attempts to contact the Name Service Caching Daemon (nscd).
205 New configure option --disable-build-nscd avoids building nscd itself;
206 this is the default if --disable-nscd is used.
208 * Improved support for cross-compilation, including cross-testing and
209 bootstrap builds without a previously built glibc.
211 * Several testsuite tests are now able to test multiple IFUNC variants of an
212 interface, rather than just testing the one that would be chooen by
215 * New configure options --with-bugurl and --with-pkgversion, for
216 distributors to use to embed their bug-reporting and package version
217 information in --help and --version output.
219 * The ttyname and ttyname_r functions on Linux now fall back to searching for
220 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
221 allows creation of chroots without the procfs mounted on /proc.
223 * The `crypt' function now fails if passed salt bytes that violate the
224 specification for those values. On Linux, the `crypt' function will
225 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
226 enabled, and fail on encrypted strings using the MD5 or DES algorithm
227 when the mode is enabled.
229 * The `clock_*' suite of functions (declared in <time.h>) is now available
230 directly in the main C library. Previously it was necessary to link with
231 -lrt to use these functions. This change has the effect that a
232 single-threaded program that uses a function such as `clock_gettime' (and
233 is not linked with -lrt) will no longer implicitly load the pthreads
234 library at runtime and so will not suffer the overheads associated with
235 multi-thread support in other code such as the C++ runtime library.
237 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
242 * The following bugs are resolved with this release:
244 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
245 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
246 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
247 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
248 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
249 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
250 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
251 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
252 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
253 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
254 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
255 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
256 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
257 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
258 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
259 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
260 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
261 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
262 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
263 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
264 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
265 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
268 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
269 configuring glibc with:
270 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
271 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
272 Implemented by H.J. Lu.
276 + define static_assert
278 + do not declare gets
280 + declare at_quick_exit and quick_exit also for ISO C11
282 + aligned_alloc. NB: The code is deliberately allows the size parameter
283 to not be a multiple of the alignment. This is a moronic requirement
284 in the standard but it is only a requirement on the caller, not the
289 + uchar.h support added
291 + CMPLX, CMPLXF, CMPLXL added
293 Implemented by Ulrich Drepper.
295 * Support for the IA-64 has been moved to ports.
297 * Remove support for anything but ELF binary format
299 * Checking versions of poll, ppoll added.
300 Implemented by Ulrich Drepper.
302 * More generic and 64-bit performance optimizations to math functions.
303 Implemented by Ulrich Drepper.
305 * New configure option --enable-obsolete-rpc makes the deprecated RPC
306 headers and functions available at compile time as they were before
307 version 2.14. This option will be removed at some time in the future
308 after the TI-RPC library becomes fully sufficient for the needs of
309 existing applications.
311 * Compatibility code for Linux kernel versions before 2.4 has been removed.
312 Note that glibc is not expected to work with any Linux kernel version
315 * New header <sys/auxv.h> and function getauxval allowing easy access to
316 the AT_* key-value pairs passed from the Linux kernel. The header also
317 defines the HWCAP_* bits associated with the AT_HWCAP key.
319 * New locales: mag_IN
321 * New configure option --enable-systemtap builds SystemTap static probes
322 into libc for setjmp and longjmp and into libpthread for various operations.
323 So far the setjmp/longjmp probes and some of the libpthread probes are
324 provided only for i*86 and x86_64.
325 Implemented by Roland McGrath and Rayson Ho.
327 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
329 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
332 * More optimized functions for SPARC. Implemented by David S. Miller.
334 * Improved support for cross-compilation, especially bootstrap builds
335 without a previously built glibc.
337 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
338 Chris Metcalf from Tilera.
340 * Support for the old ARM ABI has been removed from ports. Only the EABI is
341 now supported for ARM processors.
343 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
344 as the name of the dynamic linker, to distinguish it from the
345 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
347 * Support for CRIS has been removed from ports.
349 * A new class of installed header has been documented for low-level
350 platform-specific functionality. PowerPC added the first instance with a
351 function to provide time base register access. Contributed by Tulio
352 Magno Quites Machado Filho.
354 * ix86 configurations now install header files that are consistent with
355 what x86-64 configurations install. These same header files can be used
356 for -m32, -m64, or -mx32 builds.
357 Contributed by H.J. Lu.
359 * Math library bug fixes. A thorough audit of all open math library bugs was
360 conducted by Joseph Myers. Significant progress was made on many math
361 library bugs resulting in more accurate exceptions and function results.
362 Many thanks to all those that contributed including Andreas Jaeger for his
363 patch review and work on the x87 trigonometric instruction issues.
365 * Timezone data is no longer installed. Timezone-related binaries and scripts
366 will continue to be installed. Users should obtain their timezone data from
367 their distribution provider or from the tzdata package at
368 <ftp://munnari.oz.au/pub/>.
372 * The following bugs are resolved with this release:
374 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
375 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
376 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
377 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
378 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
379 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
380 13484, 13506, 13515, 13523, 13524, 13538, 13540
382 * New program pldd to list loaded object of a process
383 Implemented by Ulrich Drepper.
385 * Add nss_db support back to glibc. No more dependency on Berkeley db
386 and support for initgroups lookups.
387 Implemented by Ulrich Drepper.
389 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
390 Contributed by HJ Lu.
392 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
393 Contributed by HJ Lu.
395 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
396 on x86-32 and x86-64.
397 Contributed by Liubov Dmitrieva.
399 * Optimized strchr and strrchr for SSE on x86-32.
400 Contributed by Liubov Dmitrieva.
402 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
403 for x86-64 and x86-32.
404 Contributed by Liubov Dmitrieva.
406 * New interfaces: scandirat, scandirat64
407 Implemented by Ulrich Drepper.
409 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
410 Implemented by Ulrich Drepper.
412 * nscd now also caches the netgroup database.
413 Implemented by Ulrich Drepper.
415 * Integrate libm with gcc's -ffinite-math-only option.
416 Implemented by Ulrich Drepper.
418 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
419 to math functions. Implemented by Ulrich Drepper.
421 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
422 Implemented by Ulrich Drepper.
424 * New Linux interfaces: process_vm_readv, process_vm_writev
426 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
427 Implemented by Ulrich Drepper.
429 * Optimized nearbyint and strcasecmp for PPC.
430 Implemented by Adhemerval Zanella.
432 * New locales: bho_IN, unm_US, es_CU, ta_LK
436 * The following bugs are resolved with this release:
438 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
439 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
440 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
441 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
442 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
443 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
444 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
445 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
446 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
447 12795, 12811, 12813, 12814, 12841
449 * The RPC implementation in libc is obsoleted. Old programs keep working
450 but new programs cannot be linked with the routines in libc anymore.
451 Programs in need of RPC functionality must be linked against TI-RPC.
452 The TI-RPC implementation is IPv6 enabled and there are other benefits.
454 Visible changes of this change include (obviously) the inability to link
455 programs using RPC functions without referencing the TI-RPC library and the
456 removal of the RPC headers from the glibc headers.
457 Implemented by Ulrich Drepper.
459 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
460 syncfs, setns, sendmmsg
462 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
463 yue_HK, lij_IT, mhr_RU
465 * New encodings: CP770, CP771, CP772, CP773, CP774
467 * New program sotruss to trace calls through PLTs
468 Implemented by Ulrich Drepper.
470 * The malloc hook implementation is marked deprecated and will be removed
471 from the default implementation in the next version. The design never
472 worked ever since the introduction of threads. Even programs which do
473 not create threads themselves can use multiple threads created internally.
477 * The following bugs are resolved with this release:
479 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
480 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
481 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
482 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
485 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
487 * POWER7 optimizations: memset, memcmp, strncmp
489 * New optimized string functions for x86-64: strnlen (SSE2),
490 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
491 Implemented by Ulrich Drepper.
495 * The following bugs are resolved with this release:
497 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
498 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
499 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
500 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
501 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
502 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
503 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
504 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
506 * New interfaces: pthread_getname_np, pthread_setname_np
508 * New Linux interface: recvmmsg
510 * STT_GNU_IFUNC implemented for Sparc by David Miller.
512 * The dynamic linker now recognizes supported ABI versions from the
513 EI_ABIVERSION field in the ELF header.
514 Implemented by Ulrich Drepper.
516 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
517 will not be used to fill in password fields in the passwd.byname replies.
518 Instead it is used to synthesize the shadow.byname table, should it be
519 missing. This is a useful mode in some installations involving Solaris.
520 Implemented by Ulrich Drepper.
522 * New locales: kok_IN, sq_MK, cv_RU
526 * The following bugs are resolved with this release:
528 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
529 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
530 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
531 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
532 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
533 10789, 10817, 10823, 10840, 10847
535 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
537 Implemented by Ulrich Drepper.
539 * Checking version of longjmp added that fails if an uninitialized stack
540 frame would be created. Implemented by Ulrich Drepper.
542 * STT_GNU_IFUNC is now supported in static executables.
543 Implemented by H.J. Lu.
545 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
547 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
548 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
549 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
550 Contributed by H.J. Lu.
552 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
553 Implemented by Ulrich Drepper.
555 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
557 Contributed by H.J. Lu.
559 * Support for fma instruction in AVX on x86-64.
560 Implemented by H.J. Lu and Ulrich Drepper.
562 * AVX support in x86-64 auditing support in ld.so.
563 Implemented by H.J. Lu.
565 * STB_GNU_UNIQUE support added.
566 Implemented by Ulrich Drepper.
568 * Implement second fallback mode for optimized DNS lookup for even more
569 broken environments. If two requests from the same port are not
570 handled correctly close the socket and open a new one before sending
571 the second request. The 'single-request-reopen' option in /etc/resolv.conf
572 can be used to select this mode right away, instead of rediscovering the
573 necessity is every process again.
574 Implemented by Ulrich Drepper.
576 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
577 Implemented by Adam Tkac.
579 * Optimized iconv conversions for S390x.
580 Implemented by Andreas Krebbel.
582 * Using condvars with PI mutexes is now more efficient due to kernel
583 support for requeueing to PI futexes. NPTL support added for x86-64.
584 Implemented by Ulrich Drepper.
586 * New locales: ps_AF, my_MM
590 * The following bugs are resolved with this release:
592 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
593 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
594 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
595 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
596 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
598 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
599 Implemented by Ulrich Drepper.
601 * New Linux interfaces: accept4, fallocate, fallocate64.
602 Implemented by Ulrich Drepper.
604 * Correct declarations of string function when used in C++ code. This
605 could lead to compile errors for invalid C++ code.
607 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
610 * New POSIX 2008 interface: psiginfo
611 Implemented by Ulrich Drepper.
613 * New ISO C++1x interfaces: quick_exit, at_quick_exit
614 Implemented by Ulrich Drepper.
616 * Support for selecting between multiple function definitions at runtime
617 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
619 * The libcrypt library can now use the hash function implementations in
620 NSS. Implemented by Ulrich Drepper.
622 * The malloc implementation can be compiled to be less memory efficient
623 but higher performing in multi-threaded programs.
624 Implemented by Ulrich Drepper.
626 * New locales: nan_TW@latin, ks_IN
628 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
629 Implemented by Ulrich Drepper.
631 * Extended printf hook support. It is possible to use user-defined types
632 and extend existing format specifiers.
633 Implemented by Ulrich Drepper.
635 * Handling for group shadow files has been added.
636 Implemented by Ulrich Drepper.
638 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
639 servers (the case, e.g., for some people using the built-in DNS
640 server in ADSL modems/routers). There is a once-per-process timeout
641 in case of a broken server. To avoid it, users can run nscd or put
642 'options single-request' in /etc/resolv.conf.
643 Implemented by Ulrich Drepper.
647 * The following bugs are resolved with this release:
649 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
650 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
651 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
652 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
653 6968, 6974, 6980, 6995, 7008, 7009, 7029
655 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
656 up at the same time. Implemented by Ulrich Drepper.
658 * TLS descriptors for LD and GD on x86 and x86-64.
659 Implemented by Alexandre Oliva.
661 * getaddrinfo now handles DCCP and UDPlite.
662 Implemented by Ulrich Drepper.
664 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
665 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
666 Implemented by Ulrich Drepper.
668 * New implementation of memmem, strstr, and strcasestr which is O(n).
669 Implemented by Eric Blake.
671 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
673 * Implement "e" option for popen to open file descriptor with the
674 close-on-exec flag set. Implemented by Ulrich Drepper.
676 * Implement "b" mode for fmemopen. In this mode writes writes don't
677 implicitly add a NUL byte and seeks from the end of the buffer really
678 use the buffer end, not the string length as the basis.
679 Implemented by Ulrich Drepper.
681 * Many functions, exported and internal, now atomically set the close-on-exec
682 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
684 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
686 Implemented by Pravin Satpute.
688 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
692 * The following bugs are resolved with this release:
694 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
695 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
696 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
697 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
698 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
699 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
700 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
702 * New locales: bo_CN, bo_IN, shs_CA.
704 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
706 * Sorting rules for some Indian languages (Devanagari and Gujarati).
707 Implemented by Pravin Satpute.
709 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
711 * nscd caches now all timeouts for DNS entries
712 Implemented by Ulrich Drepper.
714 * nscd is more efficient and wakes up less often.
715 Implemented by Ulrich Drepper.
717 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
718 vdprintf, and obstack_vprintf.
719 Implemented by Jakub Jelinek.
721 * Faster memset for x86-64.
722 Implemented by Harsha Jagasia and H.J. Lu.
724 * Faster memcpy on x86.
725 Implemented by Ulrich Drepper.
727 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
728 Implemented by Ulrich Drepper.
730 * Faster sqrt and sqrtf implemention for some PPC variants.
731 Implemented by Steven Munroe.
735 * The following bugs are resolved with this release:
737 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
738 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
739 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
740 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
741 5071, 5103, 5104, 5112, 5113, 5184, 5186
743 * More checking functions: fread, fread_unlocked, open*, mq_open.
744 Implemented by Jakub Jelinek and Ulrich Drepper.
746 * Extend fortification to C++. Implemented by Jakub Jelinek.
748 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
749 by not recognizing 'a' as a modifier when those specs are requested.
750 Implemented by Jakub Jelinek.
752 * PPC optimizations to math and string functions.
753 Implemented by Steven Munroe.
755 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
756 options to be passed. Implemented by Ulrich Drepper.
758 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
760 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
761 Implemented by Ulrich Drepper.
763 * Handle private futexes in the NPTL implementation.
764 Implemented by Jakub Jelinek and Ulrich Drepper.
766 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
767 Implemented by Roland McGrath and Ulrich Drepper.
769 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
771 * SHA-256 and SHA-512 based password encryption.
772 Implemented by Ulrich Drepper.
774 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
775 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
778 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
779 Implemented by Ulrich Drepper.
783 * The following bugs are resolved with this release:
785 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
786 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
787 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
788 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
789 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
790 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
791 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
794 * New Linux interfaces: epoll_pwait, sched_getcpu.
796 * New generic interfaces: strerror_l.
798 * nscd can now cache the services database. Implemented by Ulrich Drepper.
802 * The following bugs are resolved with this release:
804 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
805 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
806 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
807 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
808 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
809 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
810 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
811 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
812 3225, 3251, 3252, 3253, 3273
814 * For Linux, the sorting of addresses returned by getaddrinfo now also
815 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
816 Implemented by Ulrich Drepper.
818 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
819 Implemented by Ulrich Drepper.
821 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
823 * New iconv module for MIK. Contributed by Alexander Shopov.
825 * For sites with broken group and/or passwd database, the auto-propagate
826 option of nscd can prevent creating ID lookup entries from the results
827 of a name lookup and vice versa. This usually is no problem but some
828 site might have problems with the default behavior.
829 Implemented by Ulrich Drepper.
831 * Iterating over entire database in NIS can be slow. With the
832 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
833 to trade time for memory. The entire database will be read at once.
834 Implemented by Ulrich Drepper.
836 * The interfaces introduced in RFC 3542 have been implemented by
839 * Support for the new ELF hash table format was added by Ulrich Drepper.
841 * Support for priority inheritance mutexes added by Jakub Jelinek and
844 * Support for priority protected mutexes added by Jakub Jelinek.
846 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
847 or_IN, csb_PL, fy_NL, sr_ME.
851 * More overflow detection functions.
853 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
854 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
856 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
857 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
858 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
859 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
860 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
861 by Masahide Washizawa.
863 * It is now possible to install audit libraries for the dynamic linker using
864 LD_AUDIT. Implemented by Ulrich Drepper.
866 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
867 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
868 For a libc and libpthread that works well on Linux 2.4 kernels, we
869 recommend using the stable 2.3 branch.
871 * The new function open_wmemstream acts like open_memstream,
872 but uses a wchar_t wide character buffer.
874 * The new function ppoll is an improved version of poll, similar to pselect.
876 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
877 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
878 renameat, unlinkat, linkat, symlinkat, readlinkat.
880 * New Linux kernel system calls: unshare,
881 inotify_init, inotify_add_watch, inotify_rm_watch.
883 * The euidaccess function is now also known by the alias eaccess,
884 for compatibility with some other systems.
886 * Timezone data updated to 2006b version.
890 * The following bugs are resolved with this release:
892 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
893 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
894 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
895 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
896 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
897 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
899 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
901 * As of this release, GCC 4 can be used to compile the C Library.
903 * Timezone data updated to 2005m version.
907 * The following bugs are resolved with this release:
909 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
910 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
911 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
912 777, 787, 821, 822, 823, 825
914 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
918 * Support for RFC 3678. Real implementations exist only for Linux so far.
919 Implemented by Ulrich Drepper.
921 * nscd can now cache entries persistently. Expiring entries are reloaded.
922 For speedups the cache can be shared in memory with client processes.
923 Implemented by Ulrich Drepper.
925 * nscd can now perform SELinux checks.
926 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
928 * getaddrinfo queries are now cached. Canonical name lookup is performed
930 Implemented by Ulrich Drepper.
932 * The nothrow function attribute is used when headers are used by gcc when
933 compiling C code. This can avoid significant amounts of exception
936 * The malloc functions perform more error checking and are stricter when
937 it comes to reacting on errors. The default action is to terminate
938 the process after showing an error message. Implemented by Ulrich Drepper.
940 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
941 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
943 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
944 namespaces using the new function dlmopen(). This feature is of course,
945 like most other dynamic loading functionality, not available in statically
946 linked applications. Implemented by Ulrich Drepper.
948 * Low-overhead boundary checking variants of string and some stdio functions
949 were added. These are to be used in conjunction with a gcc patch by
950 Jakub Jelinek which adds calls to these functions if possible.
951 Implemented by Jakub Jelinek and Ulrich Drepper.
953 * Old code for several operating systems and machine architectures that
954 have not been in working condition in a long time have been removed from
955 the main source tree maintained by the GNU C Library's maintainers.
956 These files are now reside in the separate `ports' source module
957 that is usable as an add-on when building the library.
961 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
962 interrogate the dynamic linker, compatible with the Solaris interface.
964 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
965 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
967 * getifaddrs now uses the netlink interface on Linux to get its information.
968 Implemented by Thorsten Kukuk.
970 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
971 Implemented by Ulrich Drepper.
973 * support for non-executable stacks on x86 has been added. Changes mostly
976 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
979 * getaddrinfo now performs destination address selection according to
984 * Thread-safe interfaces for many functions that access locale data
985 were added in version 2.3, but these features were omitted from NEWS.
986 Many functions have variants with an `_l' suffix that take a `locale_t'
987 object as a parameter rather than consulting the current locale.
988 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
989 create and maintain `locale_t' objects. Additionally, the new function
990 `uselocale' sets "the current locale" (as used by functions not so
991 parameterized) set for an individual thread. These features were added
992 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
994 * The functions getresuid, getresgid, setresuid, and setresgid, which
995 have long been available on Linux, are now declared in <unistd.h>
996 and are now also available on the Hurd.
998 * ELF thread-local storage support (TLS) now works on x86-64.
1000 * The new dynamic string token $LIB is expanded in shared library names.
1001 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1003 * Aldy Hernandez contributed complete software floating point support for
1004 PowerPC machines with no FPU.
1006 * fexecve is implemented on Linux.
1008 * The `btowc' function should work at least twice as fast due to
1009 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1011 * With approriate thread add-ons cancelable functions are now implemented
1012 in libc.so as well. No need to call the function in libpthread. This
1013 change allowed to finally disable the incorrect and expensive handling
1014 of weak definition in ld.so.
1016 * Yet more PLT entries in libc.so have been removed. We finally arrived
1017 at the bare minimum. Startup times improved appropriately.
1019 * Support for the new Linux/x86 system call interface was added. The
1020 AT_SYSINFO auxiliary vector entry is recognized and handled.
1024 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1027 * iconv (the program and the interface) now accepts empty names (excluding
1028 options like //TRANSLIT) to mean "use charset of current locale".
1030 * localedef can now transliterate characters in strings which are not in
1031 the provided charmap. The information from the input locale is used.
1033 * Prelinking support was added for ELF targets. This requires additional
1034 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1036 * Read-only stdio streams now use mmap to speed up operation by eliminating
1037 copying and buffer underflows. To use add 'm' to the mode string of
1038 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1040 * The malloc functions were completely rewritten by Wolfram Gloger based
1041 on Doug Lea's malloc-2.7.0.c.
1043 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1044 implementation of regex.
1046 * Bruno Haible upgraded the iconv and locale implementation to support
1049 * Contents of the LC_* and LANG environment variables in the CEN style are
1050 not recognized anymore. It never was used. Change by Ulrich Drepper.
1052 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1053 thread-local storage (TLS) ABI on some platforms.
1054 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1056 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1057 EUC-JISX0213, and TSCII.
1059 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1060 BSD-compatible interface for getting all network interface addresses.
1061 Implementation for IPv4 by Roland McGrath.
1063 * Loading of locale data is faster due to the introduction of a locale
1064 archive. Implemented by Roland McGrath and Ulrich Drepper.
1066 * Startup times are significantly reduced by not using exported functions
1067 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1070 * Steven Munroe contributed a port to PowerPC64/Linux.
1074 * The Hurd now uses the GNU libio implementation of stdio rather than the
1075 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1077 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1078 with the same behavior as the Linux system call of the same name.
1082 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1083 128-bit long double format.
1085 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1086 IBM1161, and IBM1162 charsets.
1088 * Andreas Jaeger contributed a port to x86-64/Linux.
1090 * Peter Bruin contributed a port to PowerPC/Hurd.
1092 * libc functions using I/O streams now can handle wide-oriented streams
1095 * optimizations in the dynamic linker. Binaries created by recent binutils
1096 versions start up quicker due to reduced time spent on relocations.
1098 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1102 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1103 asinh, atanh, j0 for the 128-bit long double format.
1105 * Bruno Haible updated all the code handling Unicode in some form to
1106 support Unicode 3.1.
1108 * Speed of regex for single-byte locales is back to previous levels.
1109 Patch by Isamu Hasegawa.
1111 * Alpha, SPARC, and IA-64 now also using floating stacks.
1113 * Startup time of internationalized applications greatly improved through
1114 iconv cache. Use iconvconfig to generate the cache file.
1115 Contributed by Ulrich Drepper.
1117 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1118 severe performance problems. Patch by David Mosberger.
1120 * The Hurd port got a lot more functionality like AIO, various stdio
1121 extensions, etc. Mainly done by Roland McGrath.
1123 * mtrace can now lookup symbols in shared libraries.
1127 * Intel's IA-64 math library is largely integrated. It provides fast and
1128 accurate implementatations for most basic and standard math functions
1129 in float, double, and long double format.
1131 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1132 and asin for the 96-bit long double format and asin, log, tan for the
1133 128-bit long double format.
1135 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1136 The basic double functions exist today. Contributed by Abraham Ziv
1137 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1138 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1140 * An asynchronous name lookup library was added. The interface is designed
1141 after POSIX AIO. The proposal was circulated beforehand to get comments.
1142 No negative ones came in. Implemented by Ulrich Drepper.
1144 * Port to S390/64bit contributed by Martin Schwidefsky
1145 <schwidefsky@de.ibm.com>.
1147 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1148 of functions for Linux/IA-64.
1150 * The RPC code is now thread safe. Threads can now use the same service
1151 of different services at the same time. Patch by Eric Norum
1152 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1154 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1155 family of functions for Linux/S390.
1157 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1158 of functions for Linux/x86.
1160 * Port to Linux/CRIS contributed by Axis Communications.
1164 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1165 we can now check for namespace violations and missing declarations. The
1166 result is that almost all headers are now Unix-compliant (as defined in
1167 the upcoming XPG6). The negative side is that some programs might need
1168 corrections, too, if they depend on the incorrect form of the headers in
1169 previous versions which defined too many symbols and included too many
1172 * regex now handles multibyte character sets correctly.
1173 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1175 * iconv (the program) does now conform to the upcoming XPG6 and handles
1176 charmaps. Instead of the charset names the path of charmaps can be
1177 provided and the conversion happens based on this data.
1178 Contributed by Ulrich Drepper.
1180 * The locale program now provides detailed information about the installed
1185 only lists the names of the supported locales
1189 provides details such as country, language, and codeset name.
1190 Contributed by Ulrich Drepper.
1194 * The gencat program now parses the input file according to the charset
1195 selected by the LC_CTYPE category. This is important for stateful
1196 character sets. To make generating catalogs easier there is a way
1197 to overwrite the charset selected by the locale: before the first
1198 message or $ quote line the catalog can contain a line like
1200 $ codeset=ISO-8859-2
1202 to select the charset (ISO-8859-2 in this case).
1204 Implemented by Shinya Hanataka and Ulrich Drepper.
1206 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1207 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1208 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1210 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1211 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1213 * The LANGUAGE environment variable is now ignored unless the locale is
1214 changed from the default "C" locale.
1216 * The usual bug fixes.
1220 * Greg McGary added runtime support for bounds checking using gcc's
1221 new -fbounded-pointers option. ix86 target is complete. PowerPC
1224 * Thorsten Kukuk added secure mode support to nscd.
1226 * The Berkeley db libraries have been removed.
1228 Related, the nss_db module is now in a separate package since it
1229 obviously requires a database library being available.
1231 * Wide character I/O streams implemented by Ulrich Drepper.
1233 * Functions from the extended socket API added by Ulrich Drepper.
1235 * Functions feenableexcept and fedisableexcept to control the
1236 behaviour of individual exceptions have been added by Andreas Jaeger.
1238 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1240 * The resolver code has been updated from bind 8.2.3-T5B which supports
1241 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1244 This change could in some situations effect backward compatibility. Since
1245 now `_res' is a thread-local instead of a global variable, modifying it
1246 in one thread does not have any effect in other threads.
1248 The resolver library was also extended to allow IPv6 as the transport
1249 protocol for the requests. This work was done by Stig Venaas.
1251 * Compatibility code for K&R C compilers has been removed from the
1252 header files. A ISO C compiler is needed to use the library
1253 (conforming to either C89 or C99 standard).
1255 * Complete rewrite of the localedef program to support multibyte character
1256 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1257 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1258 Implemented by Ulrich Drepper.
1260 Bruno Haible significantly improved the generation and use of the data
1261 structures for the wide character tables.
1263 * Plural handling in gettext implemented by Ulrich Drepper.
1265 * The utmp daemon has been removed.
1267 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1269 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1272 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1274 * POSIX barriers implemented by Kaz Kylheku.
1276 * POSIX spawn function family implemented by Ulrich Drepper.
1278 * POSIX spinlocks are now available.
1280 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1282 * the configure option --enable-kernel=X.Y.Z allows to strip out
1283 compatibility for kernel versions before X.Y.Z. This is currently only
1284 implemented for Linux.
1286 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1287 field sin6_scope_id. This means that all programs using IPv6 should be
1288 recompiled. Don't expect binary compatibility with previous glibc
1291 * various conversion modules for IBM character sets contributed by
1294 * IA-64 port by Jes Sorensen and HJ Lu.
1308 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1310 * New xdr functions are added; some rpc functions are now 64bit clean.
1312 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1314 * Fixed known incompatibilities with glibc 2.0.
1316 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1318 * Optimized a number of functions (especially the ELF dynamic loader).
1320 * Update timezone data files.
1322 * lots of charmaps corrections
1324 * some new locale definitions and charmaps
1329 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1330 conform to POSIX member type requirements. Symbol versions have been
1331 adjusted as needed within the library, and for direct use by applications,
1332 but there is potential for problems if third-party libraries use
1333 struct timeval as part of their interface. This does not present
1334 a problem for X and other "essential" system libraries.
1336 * An additional locale model to support C++ Standard Library locale
1337 model and probably more was implemented by Ulrich Drepper.
1339 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1342 * Miles Bader provided the `argp' function family to support hierachical
1343 command line argument parsing, layered on top of getopt.
1345 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1347 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1350 * scanf recognizes the %a and %A format for scanning floating point numbers.
1352 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1353 information and interfaces for the available integer types.
1355 * about 130 new math functions were added to implement the ISO C9x math
1358 * the new header <complex.h> contains definitions of the complex math
1359 functions from ISO C 9X.
1361 * the new header <tgmath.h> defines generic macros to use complex or
1362 real valued functions.
1364 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1366 * Andreas Jaeger provided a test suite for the math library.
1368 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1370 * Ulrich Drepper added character set conversion functions (iconv).
1372 * Optimized string functions have been added.
1374 * The localedata addon is now part of glibc.
1376 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1378 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1379 daemon for NSS (nscd).
1381 Missing a better place here are some numbers on improvements. Under
1382 Linux 2.1.125 un-tar-ing the kernel sources takes
1386 using local files 12.19s 6.88s 22.91s
1388 using NIS 13.92s 8.91s 26.34s
1390 using NIS & nscd 10.37s 7.34s 25.30s
1392 using NIS+ 27.57s 30.37s 640.46s
1394 using NIS+ & nscd 10.25s 7.83s 26.51s
1396 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1398 Keep in mind that non-namelookup related operations dominate above times.
1399 It was just a common complain that using NIS+ unpacking the kernel is
1402 [1] The old nscd implementation is not available anymore since it was
1403 distributed with glibc up to version 2.0.98 and thus is now replaced.
1405 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1407 * Mark Kettenis provided a Hesiod NSS module.
1409 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1410 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1412 * rcmd can now handle netgroups (Dick Streefland).
1414 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1417 * Support for the IPv6 protocol has been added to the socket API, as per the
1418 latest draft standards.
1420 * Support for Linux 2.2 has been added.
1422 * Interface changes relative to the latest 2.0.x release:
1423 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1424 addseverity NEW: Unix98
1425 alphasort64 NEW: LFS
1426 argp_err_exit_status NEW: argp, GNU ext
1427 argp_error NEW: argp, GNU ext
1428 argp_failure NEW: argp, GNU ext
1429 argp_help NEW: argp, GNU ext
1430 argp_parse NEW: argp, GNU ext
1431 argp_program_bug_address NEW: argp, GNU ext
1432 argp_program_version NEW: argp, GNU ext
1433 argp_program_version_hook NEW: argp, GNU ext
1434 argp_state_help NEW: argp, GNU ext
1435 argp_usage NEW: argp, GNU ext
1436 authdes_create NEW: Secure RPC
1437 authdes_getucred NEW: Secure RPC
1438 authdes_pk_create NEW: Secure RPC
1439 backtrace NEW: GNU ext.
1440 backtrace_symbols NEW: GNU ext.
1441 backtrace_symbols_fd NEW: GNU ext.
1443 cacosf NEW: ISO C 9x
1444 cacosh NEW: ISO C 9x
1445 cacoshf NEW: ISO C 9x
1446 cacoshl NEW: ISO C 9x
1447 cacosl NEW: ISO C 9x
1454 casinf NEW: ISO C 9x
1455 casinh NEW: ISO C 9x
1456 casinhf NEW: ISO C 9x
1457 casinhl NEW: ISO C 9x
1458 casinl NEW: ISO C 9x
1460 catanf NEW: ISO C 9x
1461 catanh NEW: ISO C 9x
1462 catanhf NEW: ISO C 9x
1463 catanhl NEW: ISO C 9x
1464 catanl NEW: ISO C 9x
1465 cbc_crypt NEW: Secure RPC
1469 ccoshf NEW: ISO C 9x
1470 ccoshl NEW: ISO C 9x
1476 cimagf NEW: ISO C 9x
1477 cimagl NEW: ISO C 9x
1478 clearerr_locked REMOVED
1479 clntunix_create NEW: sunrpc ext
1481 clog10 NEW: ISO C 9x
1482 clog10f NEW: ISO C 9x
1483 clog10l NEW: ISO C 9x
1493 cprojf NEW: ISO C 9x
1494 cprojl NEW: ISO C 9x
1496 crealf NEW: ISO C 9x
1497 creall NEW: ISO C 9x
1502 csinhf NEW: ISO C 9x
1503 csinhl NEW: ISO C 9x
1506 csqrtf NEW: ISO C 9x
1507 csqrtl NEW: ISO C 9x
1511 ctanhf NEW: ISO C 9x
1512 ctanhl NEW: ISO C 9x
1514 des_setparity NEW: Secure RPC
1515 ecb_crypt NEW: Secure RPC
1516 endutxent NEW: Unix98
1518 exp10f NEW: ISO C 9x
1519 exp10l NEW: ISO C 9x
1523 fattach NEW: STREAMS
1524 fdetach NEW: STREAMS
1528 feclearexcept NEW: ISO C 9x
1529 fegetenv NEW: ISO C 9x
1530 fegetexceptflag NEW: ISO C 9x
1531 fegetround NEW: ISO C 9x
1532 feholdexcept NEW: ISO C 9x
1534 feraiseexcept NEW: ISO C 9x
1535 ferror_locked REMOVED
1536 fesetenv NEW: ISO C 9x
1537 fesetexceptflag NEW: ISO C 9x
1538 fesetround NEW: ISO C 9x
1539 fetestexcept NEW: ISO C 9x
1540 feupdateenv NEW: ISO C 9x
1541 fflush_locked REMOVED
1545 fgets_unlocked NEW: GNU ext.
1546 fileno_locked REMOVED
1558 fputc_locked REMOVED
1559 fputs_unlocked NEW: GNU ext.
1560 fread_unlocked NEW: GNU ext.
1565 fstatvfs NEW: Unix98
1569 ftruncate64 NEW: LFS
1571 fwrite_unlocked NEW: GNU ext.
1572 gai_strerror NEW: IPv6
1576 getchar_locked REMOVED
1578 getdate_err NEW: Unix98
1579 getdate_r NEW: GNU ext.
1581 getnameinfo NEW: IPv6
1582 getnetname NEW: Secure RPC
1583 getpmsg NEW: STREAMS
1584 getpt NEW: Unix98 PTY
1585 getrlimit64 NEW: LFS
1586 getutxent NEW: Unix98
1587 getutxid NEW: Unix98
1588 getutxline NEW: Unix98
1589 glob64 NEW: GNU ext.
1590 globfree64 NEW: GNU ext.
1591 gnu_get_libc_release NEW: GNU ext.
1592 gnu_get_libc_version NEW: GNU ext.
1593 grantpt NEW: Unix98 PTY
1594 host2netname NEW: Secure RPC
1596 iconv_close NEW: iconv
1597 iconv_open NEW: iconv
1598 if_freenameindex NEW: IPv6
1599 if_indextoname NEW: IPv6
1600 if_nameindex NEW: IPv6
1601 if_nametoindex NEW: IPv6
1602 in6addr_any NEW: IPv6
1603 in6addr_loopback NEW: IPv6
1604 inet6_isipv4mapped NEW: IPv6
1605 isastream NEW: STREAMS
1606 iswblank NEW: GNU ext.
1607 key_decryptsession NEW: Secure RPC
1608 key_decryptsession_pk NEW: Secure RPC
1609 key_encryptsession NEW: Secure RPC
1610 key_encryptsession_pk NEW: Secure RPC
1611 key_gendes NEW: Secure RPC
1612 key_get_conv NEW: Secure RPC
1613 key_secretkey_is_set NEW: Secure RPC
1614 key_setnet NEW: Secure RPC
1615 key_setsecret NEW: Secure RPC
1616 llrint NEW: ISO C 9x
1617 llrintf NEW: ISO C 9x
1618 llrintl NEW: ISO C 9x
1619 llround NEW: ISO C 9x
1620 llroundf NEW: ISO C 9x
1621 llroundl NEW: ISO C 9x
1626 lrintf NEW: ISO C 9x
1627 lrintl NEW: ISO C 9x
1628 lround NEW: ISO C 9x
1629 lroundf NEW: ISO C 9x
1630 lroundl NEW: ISO C 9x
1632 makecontext NEW: Unix98
1633 mempcpy NEW: GNU ext.
1636 modify_ldt NEW: kernel
1640 nearbyint NEW: ISO C 9x
1641 nearbyintf NEW: ISO C 9x
1642 nearbyintl NEW: ISO C 9x
1643 netname2host NEW: Secure RPC
1644 netname2user NEW: Secure RPC
1645 nexttoward NEW: ISO C 9x
1646 nexttowardf NEW: ISO C 9x
1647 nexttowardl NEW: ISO C 9x
1651 passwd2des NEW: Secure RPC
1653 pow10f NEW: GNU ext.
1654 pow10l NEW: GNU ext.
1657 printf_size NEW: GNU ext.
1658 printf_size_info NEW: GNU ext.
1659 profil_counter REMOVED
1660 pthread_mutexattr_getkind_np REPLACED
1661 pthread_mutexattr_setkind_np REPLACED
1662 ptsname NEW: Unix98 PTY
1663 ptsname_r NEW: Unix98 PTY
1665 putchar_locked REMOVED
1666 putgrent NEW: GNU ext.
1668 putpmsg NEW: STREAMS
1669 pututxline NEW: Unix98
1673 readdir64_r NEW: LFS
1674 remquo NEW: ISO C 9x
1675 remquof NEW: ISO C 9x
1676 remquol NEW: ISO C 9x
1678 roundf NEW: ISO C 9x
1679 roundl NEW: ISO C 9x
1681 scalbln NEW: ISO C 9x
1682 scalblnf NEW: ISO C 9x
1683 scalblnl NEW: ISO C 9x
1685 sendfile NEW: kernel
1686 setcontext NEW: Unix98
1687 setrlimit64 NEW: LFS
1688 setutxent NEW: Unix98
1690 sigignore NEW: Unix98
1691 sigqueue NEW: POSIX.1b
1692 sigrelse NEW: Unix98
1693 sigset NEW: POSIX.1b
1694 sigtimedwait NEW: POSIX.1b
1695 sigwaitinfo NEW: POSIX.1b
1696 sincos NEW: GNU ext.
1697 sincosf NEW: GNU ext.
1698 sincosl NEW: GNU ext.
1702 strcasestr NEW: GNU ext.
1703 strtoimax NEW: ISO C 9x
1704 strtoumax NEW: ISO C 9x
1705 strverscmp NEW: GNU ext.
1706 svcauthdes_stats NEW: Secure RPC
1707 svcunix_create NEW: sunrpc etx
1708 svcunixfd_create NEW: sunrpc ext
1709 swapcontext NEW: Unix98
1710 tcgetsid NEW: Unix98 PTY
1711 tdestroy NEW: GNU ext.
1712 tgamma NEW: ISO C 9x
1713 tgammaf NEW: ISO C 9x
1714 tgammal NEW: ISO C 9x
1718 truncf NEW: ISO C 9x
1719 truncl NEW: ISO C 9x
1721 unlockpt NEW: Unix98 PTY
1722 updwtmpx NEW: Unix98
1723 user2netname NEW: Secure RPC
1724 utmpxname NEW: Unix98
1725 versionsort NEW: GNU ext.
1726 versionsort64 NEW: GNU ext.
1728 wcscasecmp NEW: GNU ext.
1729 wcsncasecmp NEW: GNU ext.
1730 wcsnlen NEW: GNU ext.
1731 wcstoimax NEW: ISO C 9x
1732 wcstoll NEW: ISO C 9x
1733 wcstoull NEW: ISO C 9x
1734 wcstoumax NEW: ISO C 9x
1736 wordexp NEW: POSIX.2
1737 wordfree NEW: POSIX.2
1738 write_profiling REMOVED
1739 xdecrypt NEW: Secure RPC
1740 xdr_authdes_cred NEW: Secure RPC
1741 xdr_authdes_verf NEW: Secure RPC
1742 xdr_cryptkeyarg NEW: Secure RPC
1743 xdr_cryptkeyarg2 NEW: Secure RPC
1744 xdr_cryptkeyres NEW: Secure RPC
1745 xdr_getcredres NEW: Secure RPC
1746 xdr_key_netstarg NEW: Secure RPC
1747 xdr_key_netstres NEW: Secure RPC
1748 xdr_keybuf NEW: Secure RPC
1749 xdr_keystatus NEW: Secure RPC
1750 xdr_netnamestr NEW: Secure RPC
1751 xdr_sizeof NEW: Secure RPC
1752 xdr_unixcred NEW: sunrpc ext
1753 xencrypt NEW: Secure RPC
1754 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1765 * inet_ntoa is thread-safe
1767 * updwtmp is moved from libutil to libc
1769 * rewrite of cbrt function
1771 * update of timezone data
1785 * add atoll function
1787 * fix complex problems in Berkeley DB code
1789 * fix math functions
1793 * fixed lots of header problems (especially Linux/GNU specific)
1795 * dynamic loader preserves all registers
1797 * Roland McGrath provided support for handling of auxiliary objects in
1798 the ELF dynamic loader.
1800 * support for parallel builds is improved
1804 * GNU extensions are no longer declared by default. To enable them you
1805 must define the macro `_GNU_SOURCE' in your program or compile with
1808 * The library has changed from using GNU ld symbol aliases to using weak
1809 symbols where available. The ELF object file format supports weak
1810 symbols; GNU ld also supports weak symbols in the a.out format. (There
1811 is also now support for other GNU ld extensions in ELF. Use the
1812 `--with-elf' option to configure to indicate you have ELF, and
1813 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1814 of many files which contained only symbol aliases, reducing the size of
1815 the source and the compiled library; many other files were renamed to
1816 less cryptic names previously occupied by the symbol alias files.
1817 There is a new header file <elf.h> for programs which operate on
1818 files in the ELF format.
1820 * Converted to Autoconf version 2, so `configure' has more options.
1821 Run `configure --help' to see the details.
1823 * The library can now be configured to build profiling, highly-optimized
1824 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1825 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1826 `configure' enable building these extra libraries. The shared library is
1827 built by default when using both ELF and GNU ld. When shared libraries
1828 are enabled, the new library `-ldl' is available for arbitrary run-time
1829 loading of shared objects; its interface is defined in <dlfcn.h>. The
1830 new header file <link.h> gives access to the internals of the run-time
1831 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1832 application of same name on other systems and it provides information
1833 about dynamically linked binaries.
1835 * The C library now provides the run-time support code for profiling
1836 executables compiled with `-pg'. Programs can control the profiling code
1837 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1838 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1839 the support for this file format was contributed by David Mosberger-Tang.
1841 * The math code has been replaced with a math library based on fdlibm from
1842 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1843 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1844 functions. The math functions now reside in a separate library, so
1845 programs using them will need to use `-lm' their linking commands.
1847 * John C. Bowman contributed optimized ix87 assembler inline functions.
1849 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1850 mechanism similar to that found in Solaris 2. This is now used for the
1851 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1852 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1853 file controls what services are used for each individual database. This
1854 works by loading shared libraries with names specified in `nsswitch.conf',
1855 so service modules can be changed or added at any time without even
1856 relinking any program. Currently there are the file, db, and NIS based
1857 NSS services available.
1859 * The new functions `strtoq' and `strtouq' parse integer values from
1860 strings, like `strtol' and `strtoul', but they return `long long int' and
1861 `unsigned long long int' values, respectively (64-bit quantities).
1863 * The new functions `strtof' and `strtold' parse floating-point values from
1864 strings, like `strtod', but they return `float' and `long double' values,
1865 respectively (on some machines `double' and `long double' are the same).
1867 * Ulrich Drepper has contributed new implementations of the floating-point
1868 printing and reading code used in the `printf' family of functions and
1869 `strtod', `strtof', and `strtold'. These new functions are perfectly
1870 accurate, and much faster than the old ones.
1872 * The implementation of the POSIX locale model was completely rewritten by
1873 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1874 to compile the POSIX locale definition.
1876 * The former dummy implementations of the strcoll and strxfrm function are
1877 now replaced by fully functional code contributed by Ulrich Drepper. The
1878 collation information comes from the POSIX locale definitions.
1880 * The new header <langinfo.h> defines an interface for accessing
1881 various locale-dependent data (using the locale chosen with `setlocale').
1883 * Ulrich Drepper has contributed a new suite of functions for operation on
1884 wide-character and multibyte-character strings, in <wchar.h>;
1885 and classification and case conversion of wide characters, in <wctype.h>.
1886 These new functions are conforming to the ISO C, Amendement 1 specification.
1888 * There is now a second implementation of the standard I/O library available.
1889 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1890 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1892 * You can now use positional parameter specifications in format strings
1893 for the `printf' and `scanf' families of functions. For example,
1894 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1895 ``Number 6, Mr Jones''. This is mainly useful when providing different
1896 format strings for different languages, whose grammars may dictate
1897 different orderings of the values being printed. To support this
1898 feature, the interface for `register_printf_handler' has changed; see
1899 the header file <printf.h> for details.
1901 * The `printf' and `scanf' families of functions now understand a new
1902 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1903 to group numbers as indicated by the locale; for `scanf' and friends, this
1904 says to accept as valid only a number with all the proper grouping
1905 separators in the right places. In the default "C" locale, numbers are
1906 not grouped; but locales for specific countries will define the usual
1907 conventions (i.e. separate thousands with `,' in the US locale).
1909 * The pgrp functions have been regularized, slightly incompatibly but much
1910 less confusingly. The core functions are now `getpgid' and `setpgid',
1911 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1912 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1913 provided for compatibility. There is no longer an incompatible `getpgrp'
1914 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1916 * The new header file <fts.h> and suite of functions simplify programs that
1917 operate on directory trees. This code comes from 4.4 BSD.
1919 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1920 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1921 NSS scheme used in glibc.
1923 * There is a new malloc debugging hook `__memalign_hook'.
1925 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1926 `unsigned int' in <sys/types.h>. These are for compatibility only and
1927 their use is discouraged.
1929 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1930 done differently, so that it works even without GNU ld.
1932 * New function `euidaccess' checks allowed access to a file like `access',
1933 but using the effective IDs instead of the real IDs.
1935 * The time zone data files have been updated for the latest and greatest
1936 local time conventions of the countries of the world.
1938 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1941 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1942 for formatting floating-point numbers. They are provided only for
1943 compatibility; new programs should use `sprintf' instead. There are
1944 also equivalent function for the `long double' floating-point type and
1945 all functions also exist in a reentrant form.
1947 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1948 functions for maintaining the login-record files (primarily of use to
1949 system programs such as `login'), and convenient functions for
1950 allocating and initializing a pseudo-terminal (pty) device.
1952 * Ulrich Drepper has contributed new support for System V style
1953 shared memory and IPC on systems that support it.
1955 * Ulrich Drepper has contributed several miscellaneous new functions found
1956 in System V: The `hsearch' family of functions provide an effective
1957 implementation of hash tables; `a64l' and `l64a' provide a very simple
1958 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1961 * Ulrich Drepper has contributed new reentrant counterparts for the
1962 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1964 * Ulrich Drepper has contributed new, highly-optimized versions of several
1965 string functions for the i486/Pentium family of processors.
1967 * Ulrich Drepper has updated the Linux-specific code, based largely
1968 on work done in Hongjiu Lu's version of GNU libc for Linux.
1969 The GNU library now supports Linux versions 2.0.10 and later,
1970 using the ELF object file format (i[3456]86-*-linux).
1972 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1974 * David Mosberger-Tang and Richard Henderson have ported the C library
1975 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1976 dynamic linking support for ELF/Alpha.
1978 * Richard Henderson contributed several Alpha optimized assembler function
1979 for arithmetic and string handling.
1981 * Ulrich Drepper has contributed a new set of message catalog functions to
1982 support multiple languages using the <libintl.h> interface, for use with
1983 his new package GNU gettext. Translation volunteers have contributed
1984 catalogs of the library's messages in Spanish, German, and Korean.
1986 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1987 program and the `catgets' function for reading the catalog files it
1988 creates. (The <libintl.h> interface is preferred; we include the
1989 <nl_types.h> interface using `catgets' only for source compatibility with
1990 programs already written to use it.)
1992 * New header file <values.h> gives SVID-compatible names for <limits.h>
1995 * Various new macros, declarations, and small header files for compatibility
1998 * New function `group_member' is a convenient way to check if a process has
1999 a given effective group ID.
2001 * When using GCC 2.7 and later, the socket functions are now declared in a
2002 special way so that passing an argument of type `struct sockaddr_in *',
2003 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2004 `struct sockaddr *' type, does not generate a type-clash warning.
2006 * New function `error' declared in header file <error.h> is a convenient
2007 function for printing error messages and optionally exiting; this is the
2008 canonical function used in GNU programs. The new functions `err', `warn',
2009 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2010 doing the same thing.
2012 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2013 POSIX.2 `glob' function to do ~ and {...} expansion.
2015 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2016 `clearenv' which is used in POSIX.9 is also available.
2018 * New function `getsid' returns session ID number on systems that support it.
2020 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2021 files <db.h> and <mpool.h> provide a rich set of functions for several
2022 types of simple databases stored in memory and in files, and <ndbm.h> is
2023 an old `ndbm'-compatible interface using the `db' functions. Link with
2024 `-ldb' to get these functions.
2026 * New macro `strdupa' copies a string like `strdup', but uses local stack
2027 space from `alloca' instead of dynamic heap space from `malloc'.
2029 * New function `strnlen' is like `strlen' but searches only a given maximum
2030 number of characters for the null terminator. `stpncpy', `strndup' and
2031 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2034 * New function `statfs' in header <sys/statfs.h>.
2036 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2037 provide convenient functions for operating on blocks of null-terminated
2040 * A new suite of functions in <utmp.h> handle all the details of reading
2041 and writing the utmp file.
2043 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2046 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2047 completely POSIX compliant and also implemented the extended functionality
2048 to handle alternate digit representation and alternate era date formats.
2050 * Ulrich Drepper provided an implementation of the `strptime' function
2051 defined in XPG4.2 which transforms a string into a `struct tm' value.
2053 * Paul Eggert provided the tzselect shell script as part of the timezone
2054 code. The shell script makes it easy to select the correct timezone
2057 * The implementation of the malloc family of functions is completely replaced
2058 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2059 The implementation uses the mmap function (if available) and it is
2060 optimized for the use in multi threaded programs.
2062 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2063 functions. This new functionality is usable by specifying a special
2064 salt string and it is compatible with implementation on *BSD systems.
2066 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2067 `getsubopt' to handle second level command line options, `bsd_signal'
2068 to access BSD style `signal' functionality, the obsolete `regexp' style
2071 * the `lchown' function is available on system which support this
2074 * The implementation of the shadow password handling function was contributed
2077 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2079 * POSIX.1g support was added. The <sys/select.h> header is available,
2080 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2081 implementation of `getaddrinfo'.
2085 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2087 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2088 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2090 * The new function `daemon' from 4.4 BSD is useful for server programs that
2091 want to put themselves in the background.
2093 * Joel Sherrill has contributed support for several standalone boards that
2094 run without an operating system.
2096 * `printf', `scanf' and friends now accept a `q' type modifier for long
2097 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2099 * All of the code taken from BSD (notably most of the math and networking
2100 routines) has been updated from the BSD 4.4-Lite release.
2102 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2104 * The new functions `getdomainname' and `setdomainname' fetch or change the
2105 YP/NIS domain name. These are system calls which exist on systems which
2108 * The time zone data files have been updated for the latest international
2111 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2112 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2116 * The C library now includes support for Sun RPC, from Sun's free
2117 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2118 are included. (There is still no support for YP.)
2120 * Tom Quinn has contributed a port of the C library to SGI machines running
2121 Irix 4 (mips-sgi-irix4).
2123 * The new `lockf' function is a simplified interface to the locking
2124 facilities of `fcntl', included for compatibility.
2126 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2128 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2130 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2133 * The error message printed by `assert' for a failed assertion now includes
2134 the name of the program (if using GNU ld) and the name of the calling
2135 function (with versions of GCC that support this).
2137 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2139 * The library now includes the <sys/mman.h> header file and memory
2140 management functions `mmap', `munmap', `mprotect', `msync', and
2141 `madvise', on systems that support those facilities.
2143 * The interface for `mcheck' has changed slightly: the function called to
2144 abort the program when an allocation inconsistency is detected now takes
2145 an argument that indicates the type of failure. The new function
2146 `mprobe' lets you request a consistency check for a particular block at
2147 any time (checks are normally done only when you call `free' or `realloc'
2150 * It is now possible to easily cross-compile the C library, building on one
2151 system a library to run on another machine and/or operating system. All
2152 you need to do is set the variable `HOST_CC' in `configparms' to the
2153 native compiler for programs to run on the machine you are building on (a
2154 few generator programs are used on Unix systems); set `CC' to the
2157 * The new function `fexecve' (only implemented on the GNU system) executes
2158 a program file given a file descriptor already open on the file.
2162 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2163 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2165 * You can set the variable `libprefix' in `configparms' to specify a prefix
2166 to be prepended to installed library files; this makes it easy to install
2167 the GNU C library to be linked as `-lgnuc' or whatever.
2169 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2170 copies a limited number of characters from a string, and returns the
2171 address of the last character written.
2173 * You no longer need to check for whether the installed `stddef.h' is
2174 compatible with the GNU C library. configure now checks for you.
2176 * You can now define a per-stream `fileno' function to convert the
2177 stream's cookie into an integral file descriptor.
2179 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2180 allocates zero bytes of storage, and returns a unique pointer which
2181 you can pass to `realloc' or `free'. The behavior is undefined if
2182 you dereference this pointer.
2184 * The C library now runs on Sony NEWS m68k machines running either
2185 NewsOS 3 or NewsOS 4.
2187 * The new `syscall' function is a system-dependent primitive function
2188 for invoking system calls. It has the canonical behavior on Unix
2189 systems, including unreliable return values for some calls (such as
2190 `pipe', `fork' and `getppid').
2192 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2193 to `EAGAIN', which is the preferred name. On systems whose kernels
2194 use two distinct codes, the C library now translates EWOULDBLOCK to
2195 EAGAIN in every system call function.
2199 * The GNU C Library Reference Manual is now distributed with the library.
2200 `make dvi' will produce a DVI file of the printed manual.
2201 `make info' will produce Info files that you can read on line using C-h i
2202 in Emacs or the `info' program.
2203 Please send comments on the manual to bug-glibc-manual@gnu.org.
2205 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2207 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2209 * Jason Merrill has contributed a port to the Sequent Symmetry running
2210 Dynix version 3 (i386-sequent-dynix).
2212 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2213 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2215 * New function `memory_warnings' lets you arrange to get warnings when
2216 malloc is running out of memory to allocate, like Emacs gives you.
2218 * The C library now contains the relocating allocator used in Emacs 19 for
2219 its editing buffers. This allocator (ralloc) minimizes allocation
2220 overhead and fragmentation by moving allocated regions around whenever it
2221 needs to. You always refer to a ralloc'd region with a "handle" (a
2222 pointer to a pointer--an object of type `void **').
2224 * There is a new `printf' format: `%m' gives you the string corresponding
2225 to the error code in `errno'.
2227 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2228 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2229 pass, the `a' modifier says to fill in a `char **' you pass with a
2232 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2233 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2234 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2236 * `mkstemp' is a traditional Unix function to atomically create and open a
2237 uniquely-named temporary file.
2241 * The standard location for the file that says what the local timezone is
2242 has changed again. It is now `/usr/local/etc/localtime' (or more
2243 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2245 * The distribution no longer contains any files with names longer than 14
2248 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2249 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2251 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2255 * The configuration process has changed quite a bit. The `configure'
2256 script is now used just like the configuration scripts for other GNU
2257 packages. The `sysdeps' directory hierarchy is much rearranged.
2258 The file `INSTALL' explains the new scheme in detail.
2260 * The header files no longer need to be processed into ANSI C and
2261 traditional C versions. There is just one set of files to install, and
2262 it will work with ANSI or old C compilers (including `gcc -traditional').
2264 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2265 MIPS DECStation running Ultrix 4.
2267 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2268 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2269 made itself into a shared library.
2271 * Yet further improved support for the i386, running 4.3 BSD-like systems
2272 (such as Mach 3 with the Unix single-server), or System V.
2274 * New function `strncasecmp' to do case-insensitive string comparison
2275 with limited length.
2277 * New function `strsep' is a reentrant alternative to `strtok'.
2279 * New functions `scandir' and `alphasort' for searching directories.
2281 * New function `setenv' is a better interface to `putenv'.
2283 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2284 function for traversing a directory tree.
2286 * The GNU obstack package is now also part of the C library.
2287 The new function `open_obstack_stream' creates a stdio stream that
2288 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2289 formatted output directly to an obstack.
2291 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2292 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2294 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2296 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2297 things to your strings.
2299 * There are some new test programs: test-fseek, testmb, and testrand.
2301 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2302 These ports are not finished, but are a good starting place for really
2303 supporting those systems.
2305 * `/etc/localtime' is now the standard location for the file that says what
2306 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2307 This follows the general principle that `/etc' is the place for all local
2308 configuration files.
2310 * The C library header files now use `extern "C"' when used by the C++
2311 compiler, so the C library should now work with C++ code.
2313 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2314 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2317 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2318 function which uses the `merge sort' algorithm, and is said to be
2319 significantly faster than the old GNU `qsort' function. Merge sort is
2320 now the standard `qsort' function. The new algorithm can require a lot
2321 of temporary storage; so, the old sorting function is called when the
2322 required storage is not available.
2324 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2325 provides the Unix `crypt' function, plus some other entry points.
2327 * The code and header files taken from 4.4 BSD have been updated with the
2328 latest files released from Berkeley.
2330 ----------------------------------------------------------------------
2331 Copyright information:
2333 Copyright (C) 1992-2013 Free Software Foundation, Inc.
2335 Permission is granted to anyone to make or distribute verbatim copies
2336 of this document as received, in any medium, provided that the
2337 copyright notice and this permission notice are preserved,
2338 thus giving the recipient permission to redistribute in turn.
2340 Permission is granted to distribute modified versions
2341 of this document, or of portions of it,
2342 under the above conditions, provided also that they
2343 carry prominent notices stating who last changed them.
2346 version-control: never
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