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:
12 431, 13982, 13985, 14155, 14547, 14699, 15048, 15400, 15427, 15522,
13 15531, 15532, 15608, 15609, 15610, 15632, 15640, 15681, 15736, 15748,
14 15749, 15754, 15760, 15797, 15844, 15849, 15855, 15856, 15857, 15859,
15 15867, 15886, 15887, 15890, 15892, 15893, 15895, 15897, 15905, 15909,
16 15919, 15921, 15887, 15890, 15892, 15893, 15895, 15897, 15905, 15909,
17 15919, 15921, 15923, 15939, 15963, 15966, 15988.
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.
73 * The following bugs are resolved with this release:
75 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
76 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
77 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
78 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
79 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
80 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
81 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
82 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
83 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
84 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
85 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
86 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
87 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
90 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
91 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
92 Distributions can re-enable building and using pt_chown via the new configure
93 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
94 considerable security risks and should only be used if the distribution
95 understands and accepts the risks.
97 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
100 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
101 fixed (Bugzilla #15330).
103 * Add support for calling C++11 thread_local object destructors on thread
104 and program exit. This needs compiler support for offloading C++11
105 destructor calls to glibc.
107 * Improved worst case performance of libm functions with double inputs and
110 * Support for priority inherited mutexes in pthread condition variables on
111 non-x86 architectures.
113 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
115 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
117 * Optimized string functions for ARM. Implemented by Will Newton and
120 * Optimized libm functions for SPARC. Implemented by David S. Miller.
122 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
125 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
126 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
128 * Added a benchmark framework to track performance of functions in glibc.
130 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
131 It is based on draft TS 18661 and currently enabled as a GNU extension.
133 * On Linux, the clock function now uses the clock_gettime system call
134 for improved precision, rather than old times system call.
136 * Added new API functions pthread_getattr_default_np and
137 pthread_setattr_default_np to get and set the default pthread
138 attributes of a process.
140 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
141 This may improve lock scaling of existing programs on TSX capable systems.
142 When the --enable-lock-elision=yes parameter is specified at configure
143 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
146 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
147 availability). Implemented by Ryan S. Arnold.
149 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
153 * The following bugs are resolved with this release:
155 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
156 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
157 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
158 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
159 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
160 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
161 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
162 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
163 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
164 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
165 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
166 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
167 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
168 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
169 14879, 14889, 14893, 14898, 14914.
171 * Optimization of memcpy for MIPS.
173 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
174 EMFILE has been fixed (Bugzilla #14889).
176 * The add-on ports collection is now distributed in the "ports" subdirectory
177 of the main GNU C Library distribution, rather than separately.
179 * Port to ARM AArch64 contributed by Linaro.
181 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
182 Optimized versions of memcpy, memset, and memcmp added for System z10 and
184 Implemented by Andreas Krebbel.
186 * The new function secure_getenv allows secure access to the environment,
187 returning NULL if running in a SUID/SGID process. This function replaces
188 the internal function __secure_getenv.
190 * SystemTap static probes have been added into the dynamic linker.
191 Implemented by Gary Benson.
193 * Optimizations of string functions strstr, strcasestr and memmem.
194 Implemented by Maxim Kuvyrkov.
196 * The minimum Linux kernel version that this version of the GNU C Library
197 can be used with is 2.6.16.
199 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
200 powerpc POWER7. Implemented by Will Schmidt.
202 * New configure option --disable-nscd builds the C library such that it
203 never attempts to contact the Name Service Caching Daemon (nscd).
204 New configure option --disable-build-nscd avoids building nscd itself;
205 this is the default if --disable-nscd is used.
207 * Improved support for cross-compilation, including cross-testing and
208 bootstrap builds without a previously built glibc.
210 * Several testsuite tests are now able to test multiple IFUNC variants of an
211 interface, rather than just testing the one that would be chooen by
214 * New configure options --with-bugurl and --with-pkgversion, for
215 distributors to use to embed their bug-reporting and package version
216 information in --help and --version output.
218 * The ttyname and ttyname_r functions on Linux now fall back to searching for
219 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
220 allows creation of chroots without the procfs mounted on /proc.
222 * The `crypt' function now fails if passed salt bytes that violate the
223 specification for those values. On Linux, the `crypt' function will
224 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
225 enabled, and fail on encrypted strings using the MD5 or DES algorithm
226 when the mode is enabled.
228 * The `clock_*' suite of functions (declared in <time.h>) is now available
229 directly in the main C library. Previously it was necessary to link with
230 -lrt to use these functions. This change has the effect that a
231 single-threaded program that uses a function such as `clock_gettime' (and
232 is not linked with -lrt) will no longer implicitly load the pthreads
233 library at runtime and so will not suffer the overheads associated with
234 multi-thread support in other code such as the C++ runtime library.
236 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
241 * The following bugs are resolved with this release:
243 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
244 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
245 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
246 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
247 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
248 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
249 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
250 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
251 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
252 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
253 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
254 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
255 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
256 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
257 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
258 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
259 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
260 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
261 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
262 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
263 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
264 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
267 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
268 configuring glibc with:
269 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
270 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
271 Implemented by H.J. Lu.
275 + define static_assert
277 + do not declare gets
279 + declare at_quick_exit and quick_exit also for ISO C11
281 + aligned_alloc. NB: The code is deliberately allows the size parameter
282 to not be a multiple of the alignment. This is a moronic requirement
283 in the standard but it is only a requirement on the caller, not the
288 + uchar.h support added
290 + CMPLX, CMPLXF, CMPLXL added
292 Implemented by Ulrich Drepper.
294 * Support for the IA-64 has been moved to ports.
296 * Remove support for anything but ELF binary format
298 * Checking versions of poll, ppoll added.
299 Implemented by Ulrich Drepper.
301 * More generic and 64-bit performance optimizations to math functions.
302 Implemented by Ulrich Drepper.
304 * New configure option --enable-obsolete-rpc makes the deprecated RPC
305 headers and functions available at compile time as they were before
306 version 2.14. This option will be removed at some time in the future
307 after the TI-RPC library becomes fully sufficient for the needs of
308 existing applications.
310 * Compatibility code for Linux kernel versions before 2.4 has been removed.
311 Note that glibc is not expected to work with any Linux kernel version
314 * New header <sys/auxv.h> and function getauxval allowing easy access to
315 the AT_* key-value pairs passed from the Linux kernel. The header also
316 defines the HWCAP_* bits associated with the AT_HWCAP key.
318 * New locales: mag_IN
320 * New configure option --enable-systemtap builds SystemTap static probes
321 into libc for setjmp and longjmp and into libpthread for various operations.
322 So far the setjmp/longjmp probes and some of the libpthread probes are
323 provided only for i*86 and x86_64.
324 Implemented by Roland McGrath and Rayson Ho.
326 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
328 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
331 * More optimized functions for SPARC. Implemented by David S. Miller.
333 * Improved support for cross-compilation, especially bootstrap builds
334 without a previously built glibc.
336 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
337 Chris Metcalf from Tilera.
339 * Support for the old ARM ABI has been removed from ports. Only the EABI is
340 now supported for ARM processors.
342 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
343 as the name of the dynamic linker, to distinguish it from the
344 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
346 * Support for CRIS has been removed from ports.
348 * A new class of installed header has been documented for low-level
349 platform-specific functionality. PowerPC added the first instance with a
350 function to provide time base register access. Contributed by Tulio
351 Magno Quites Machado Filho.
353 * ix86 configurations now install header files that are consistent with
354 what x86-64 configurations install. These same header files can be used
355 for -m32, -m64, or -mx32 builds.
356 Contributed by H.J. Lu.
358 * Math library bug fixes. A thorough audit of all open math library bugs was
359 conducted by Joseph Myers. Significant progress was made on many math
360 library bugs resulting in more accurate exceptions and function results.
361 Many thanks to all those that contributed including Andreas Jaeger for his
362 patch review and work on the x87 trigonometric instruction issues.
364 * Timezone data is no longer installed. Timezone-related binaries and scripts
365 will continue to be installed. Users should obtain their timezone data from
366 their distribution provider or from the tzdata package at
367 <ftp://munnari.oz.au/pub/>.
371 * The following bugs are resolved with this release:
373 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
374 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
375 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
376 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
377 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
378 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
379 13484, 13506, 13515, 13523, 13524, 13538, 13540
381 * New program pldd to list loaded object of a process
382 Implemented by Ulrich Drepper.
384 * Add nss_db support back to glibc. No more dependency on Berkeley db
385 and support for initgroups lookups.
386 Implemented by Ulrich Drepper.
388 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
389 Contributed by HJ Lu.
391 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
392 Contributed by HJ Lu.
394 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
395 on x86-32 and x86-64.
396 Contributed by Liubov Dmitrieva.
398 * Optimized strchr and strrchr for SSE on x86-32.
399 Contributed by Liubov Dmitrieva.
401 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
402 for x86-64 and x86-32.
403 Contributed by Liubov Dmitrieva.
405 * New interfaces: scandirat, scandirat64
406 Implemented by Ulrich Drepper.
408 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
409 Implemented by Ulrich Drepper.
411 * nscd now also caches the netgroup database.
412 Implemented by Ulrich Drepper.
414 * Integrate libm with gcc's -ffinite-math-only option.
415 Implemented by Ulrich Drepper.
417 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
418 to math functions. Implemented by Ulrich Drepper.
420 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
421 Implemented by Ulrich Drepper.
423 * New Linux interfaces: process_vm_readv, process_vm_writev
425 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
426 Implemented by Ulrich Drepper.
428 * Optimized nearbyint and strcasecmp for PPC.
429 Implemented by Adhemerval Zanella.
431 * New locales: bho_IN, unm_US, es_CU, ta_LK
435 * The following bugs are resolved with this release:
437 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
438 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
439 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
440 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
441 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
442 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
443 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
444 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
445 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
446 12795, 12811, 12813, 12814, 12841
448 * The RPC implementation in libc is obsoleted. Old programs keep working
449 but new programs cannot be linked with the routines in libc anymore.
450 Programs in need of RPC functionality must be linked against TI-RPC.
451 The TI-RPC implementation is IPv6 enabled and there are other benefits.
453 Visible changes of this change include (obviously) the inability to link
454 programs using RPC functions without referencing the TI-RPC library and the
455 removal of the RPC headers from the glibc headers.
456 Implemented by Ulrich Drepper.
458 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
459 syncfs, setns, sendmmsg
461 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
462 yue_HK, lij_IT, mhr_RU
464 * New encodings: CP770, CP771, CP772, CP773, CP774
466 * New program sotruss to trace calls through PLTs
467 Implemented by Ulrich Drepper.
469 * The malloc hook implementation is marked deprecated and will be removed
470 from the default implementation in the next version. The design never
471 worked ever since the introduction of threads. Even programs which do
472 not create threads themselves can use multiple threads created internally.
476 * The following bugs are resolved with this release:
478 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
479 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
480 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
481 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
484 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
486 * POWER7 optimizations: memset, memcmp, strncmp
488 * New optimized string functions for x86-64: strnlen (SSE2),
489 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
490 Implemented by Ulrich Drepper.
494 * The following bugs are resolved with this release:
496 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
497 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
498 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
499 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
500 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
501 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
502 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
503 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
505 * New interfaces: pthread_getname_np, pthread_setname_np
507 * New Linux interface: recvmmsg
509 * STT_GNU_IFUNC implemented for Sparc by David Miller.
511 * The dynamic linker now recognizes supported ABI versions from the
512 EI_ABIVERSION field in the ELF header.
513 Implemented by Ulrich Drepper.
515 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
516 will not be used to fill in password fields in the passwd.byname replies.
517 Instead it is used to synthesize the shadow.byname table, should it be
518 missing. This is a useful mode in some installations involving Solaris.
519 Implemented by Ulrich Drepper.
521 * New locales: kok_IN, sq_MK, cv_RU
525 * The following bugs are resolved with this release:
527 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
528 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
529 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
530 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
531 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
532 10789, 10817, 10823, 10840, 10847
534 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
536 Implemented by Ulrich Drepper.
538 * Checking version of longjmp added that fails if an uninitialized stack
539 frame would be created. Implemented by Ulrich Drepper.
541 * STT_GNU_IFUNC is now supported in static executables.
542 Implemented by H.J. Lu.
544 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
546 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
547 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
548 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
549 Contributed by H.J. Lu.
551 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
552 Implemented by Ulrich Drepper.
554 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
556 Contributed by H.J. Lu.
558 * Support for fma instruction in AVX on x86-64.
559 Implemented by H.J. Lu and Ulrich Drepper.
561 * AVX support in x86-64 auditing support in ld.so.
562 Implemented by H.J. Lu.
564 * STB_GNU_UNIQUE support added.
565 Implemented by Ulrich Drepper.
567 * Implement second fallback mode for optimized DNS lookup for even more
568 broken environments. If two requests from the same port are not
569 handled correctly close the socket and open a new one before sending
570 the second request. The 'single-request-reopen' option in /etc/resolv.conf
571 can be used to select this mode right away, instead of rediscovering the
572 necessity is every process again.
573 Implemented by Ulrich Drepper.
575 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
576 Implemented by Adam Tkac.
578 * Optimized iconv conversions for S390x.
579 Implemented by Andreas Krebbel.
581 * Using condvars with PI mutexes is now more efficient due to kernel
582 support for requeueing to PI futexes. NPTL support added for x86-64.
583 Implemented by Ulrich Drepper.
585 * New locales: ps_AF, my_MM
589 * The following bugs are resolved with this release:
591 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
592 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
593 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
594 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
595 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
597 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
598 Implemented by Ulrich Drepper.
600 * New Linux interfaces: accept4, fallocate, fallocate64.
601 Implemented by Ulrich Drepper.
603 * Correct declarations of string function when used in C++ code. This
604 could lead to compile errors for invalid C++ code.
606 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
609 * New POSIX 2008 interface: psiginfo
610 Implemented by Ulrich Drepper.
612 * New ISO C++1x interfaces: quick_exit, at_quick_exit
613 Implemented by Ulrich Drepper.
615 * Support for selecting between multiple function definitions at runtime
616 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
618 * The libcrypt library can now use the hash function implementations in
619 NSS. Implemented by Ulrich Drepper.
621 * The malloc implementation can be compiled to be less memory efficient
622 but higher performing in multi-threaded programs.
623 Implemented by Ulrich Drepper.
625 * New locales: nan_TW@latin, ks_IN
627 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
628 Implemented by Ulrich Drepper.
630 * Extended printf hook support. It is possible to use user-defined types
631 and extend existing format specifiers.
632 Implemented by Ulrich Drepper.
634 * Handling for group shadow files has been added.
635 Implemented by Ulrich Drepper.
637 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
638 servers (the case, e.g., for some people using the built-in DNS
639 server in ADSL modems/routers). There is a once-per-process timeout
640 in case of a broken server. To avoid it, users can run nscd or put
641 'options single-request' in /etc/resolv.conf.
642 Implemented by Ulrich Drepper.
646 * The following bugs are resolved with this release:
648 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
649 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
650 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
651 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
652 6968, 6974, 6980, 6995, 7008, 7009, 7029
654 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
655 up at the same time. Implemented by Ulrich Drepper.
657 * TLS descriptors for LD and GD on x86 and x86-64.
658 Implemented by Alexandre Oliva.
660 * getaddrinfo now handles DCCP and UDPlite.
661 Implemented by Ulrich Drepper.
663 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
664 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
665 Implemented by Ulrich Drepper.
667 * New implementation of memmem, strstr, and strcasestr which is O(n).
668 Implemented by Eric Blake.
670 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
672 * Implement "e" option for popen to open file descriptor with the
673 close-on-exec flag set. Implemented by Ulrich Drepper.
675 * Implement "b" mode for fmemopen. In this mode writes writes don't
676 implicitly add a NUL byte and seeks from the end of the buffer really
677 use the buffer end, not the string length as the basis.
678 Implemented by Ulrich Drepper.
680 * Many functions, exported and internal, now atomically set the close-on-exec
681 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
683 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
685 Implemented by Pravin Satpute.
687 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
691 * The following bugs are resolved with this release:
693 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
694 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
695 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
696 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
697 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
698 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
699 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
701 * New locales: bo_CN, bo_IN, shs_CA.
703 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
705 * Sorting rules for some Indian languages (Devanagari and Gujarati).
706 Implemented by Pravin Satpute.
708 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
710 * nscd caches now all timeouts for DNS entries
711 Implemented by Ulrich Drepper.
713 * nscd is more efficient and wakes up less often.
714 Implemented by Ulrich Drepper.
716 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
717 vdprintf, and obstack_vprintf.
718 Implemented by Jakub Jelinek.
720 * Faster memset for x86-64.
721 Implemented by Harsha Jagasia and H.J. Lu.
723 * Faster memcpy on x86.
724 Implemented by Ulrich Drepper.
726 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
727 Implemented by Ulrich Drepper.
729 * Faster sqrt and sqrtf implemention for some PPC variants.
730 Implemented by Steven Munroe.
734 * The following bugs are resolved with this release:
736 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
737 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
738 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
739 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
740 5071, 5103, 5104, 5112, 5113, 5184, 5186
742 * More checking functions: fread, fread_unlocked, open*, mq_open.
743 Implemented by Jakub Jelinek and Ulrich Drepper.
745 * Extend fortification to C++. Implemented by Jakub Jelinek.
747 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
748 by not recognizing 'a' as a modifier when those specs are requested.
749 Implemented by Jakub Jelinek.
751 * PPC optimizations to math and string functions.
752 Implemented by Steven Munroe.
754 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
755 options to be passed. Implemented by Ulrich Drepper.
757 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
759 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
760 Implemented by Ulrich Drepper.
762 * Handle private futexes in the NPTL implementation.
763 Implemented by Jakub Jelinek and Ulrich Drepper.
765 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
766 Implemented by Roland McGrath and Ulrich Drepper.
768 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
770 * SHA-256 and SHA-512 based password encryption.
771 Implemented by Ulrich Drepper.
773 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
774 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
777 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
778 Implemented by Ulrich Drepper.
782 * The following bugs are resolved with this release:
784 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
785 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
786 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
787 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
788 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
789 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
790 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
793 * New Linux interfaces: epoll_pwait, sched_getcpu.
795 * New generic interfaces: strerror_l.
797 * nscd can now cache the services database. Implemented by Ulrich Drepper.
801 * The following bugs are resolved with this release:
803 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
804 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
805 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
806 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
807 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
808 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
809 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
810 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
811 3225, 3251, 3252, 3253, 3273
813 * For Linux, the sorting of addresses returned by getaddrinfo now also
814 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
815 Implemented by Ulrich Drepper.
817 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
818 Implemented by Ulrich Drepper.
820 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
822 * New iconv module for MIK. Contributed by Alexander Shopov.
824 * For sites with broken group and/or passwd database, the auto-propagate
825 option of nscd can prevent creating ID lookup entries from the results
826 of a name lookup and vice versa. This usually is no problem but some
827 site might have problems with the default behavior.
828 Implemented by Ulrich Drepper.
830 * Iterating over entire database in NIS can be slow. With the
831 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
832 to trade time for memory. The entire database will be read at once.
833 Implemented by Ulrich Drepper.
835 * The interfaces introduced in RFC 3542 have been implemented by
838 * Support for the new ELF hash table format was added by Ulrich Drepper.
840 * Support for priority inheritance mutexes added by Jakub Jelinek and
843 * Support for priority protected mutexes added by Jakub Jelinek.
845 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
846 or_IN, csb_PL, fy_NL, sr_ME.
850 * More overflow detection functions.
852 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
853 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
855 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
856 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
857 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
858 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
859 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
860 by Masahide Washizawa.
862 * It is now possible to install audit libraries for the dynamic linker using
863 LD_AUDIT. Implemented by Ulrich Drepper.
865 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
866 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
867 For a libc and libpthread that works well on Linux 2.4 kernels, we
868 recommend using the stable 2.3 branch.
870 * The new function open_wmemstream acts like open_memstream,
871 but uses a wchar_t wide character buffer.
873 * The new function ppoll is an improved version of poll, similar to pselect.
875 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
876 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
877 renameat, unlinkat, linkat, symlinkat, readlinkat.
879 * New Linux kernel system calls: unshare,
880 inotify_init, inotify_add_watch, inotify_rm_watch.
882 * The euidaccess function is now also known by the alias eaccess,
883 for compatibility with some other systems.
885 * Timezone data updated to 2006b version.
889 * The following bugs are resolved with this release:
891 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
892 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
893 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
894 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
895 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
896 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
898 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
900 * As of this release, GCC 4 can be used to compile the C Library.
902 * Timezone data updated to 2005m version.
906 * The following bugs are resolved with this release:
908 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
909 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
910 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
911 777, 787, 821, 822, 823, 825
913 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
917 * Support for RFC 3678. Real implementations exist only for Linux so far.
918 Implemented by Ulrich Drepper.
920 * nscd can now cache entries persistently. Expiring entries are reloaded.
921 For speedups the cache can be shared in memory with client processes.
922 Implemented by Ulrich Drepper.
924 * nscd can now perform SELinux checks.
925 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
927 * getaddrinfo queries are now cached. Canonical name lookup is performed
929 Implemented by Ulrich Drepper.
931 * The nothrow function attribute is used when headers are used by gcc when
932 compiling C code. This can avoid significant amounts of exception
935 * The malloc functions perform more error checking and are stricter when
936 it comes to reacting on errors. The default action is to terminate
937 the process after showing an error message. Implemented by Ulrich Drepper.
939 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
940 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
942 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
943 namespaces using the new function dlmopen(). This feature is of course,
944 like most other dynamic loading functionality, not available in statically
945 linked applications. Implemented by Ulrich Drepper.
947 * Low-overhead boundary checking variants of string and some stdio functions
948 were added. These are to be used in conjunction with a gcc patch by
949 Jakub Jelinek which adds calls to these functions if possible.
950 Implemented by Jakub Jelinek and Ulrich Drepper.
952 * Old code for several operating systems and machine architectures that
953 have not been in working condition in a long time have been removed from
954 the main source tree maintained by the GNU C Library's maintainers.
955 These files are now reside in the separate `ports' source module
956 that is usable as an add-on when building the library.
960 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
961 interrogate the dynamic linker, compatible with the Solaris interface.
963 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
964 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
966 * getifaddrs now uses the netlink interface on Linux to get its information.
967 Implemented by Thorsten Kukuk.
969 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
970 Implemented by Ulrich Drepper.
972 * support for non-executable stacks on x86 has been added. Changes mostly
975 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
978 * getaddrinfo now performs destination address selection according to
983 * Thread-safe interfaces for many functions that access locale data
984 were added in version 2.3, but these features were omitted from NEWS.
985 Many functions have variants with an `_l' suffix that take a `locale_t'
986 object as a parameter rather than consulting the current locale.
987 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
988 create and maintain `locale_t' objects. Additionally, the new function
989 `uselocale' sets "the current locale" (as used by functions not so
990 parameterized) set for an individual thread. These features were added
991 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
993 * The functions getresuid, getresgid, setresuid, and setresgid, which
994 have long been available on Linux, are now declared in <unistd.h>
995 and are now also available on the Hurd.
997 * ELF thread-local storage support (TLS) now works on x86-64.
999 * The new dynamic string token $LIB is expanded in shared library names.
1000 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1002 * Aldy Hernandez contributed complete software floating point support for
1003 PowerPC machines with no FPU.
1005 * fexecve is implemented on Linux.
1007 * The `btowc' function should work at least twice as fast due to
1008 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1010 * With approriate thread add-ons cancelable functions are now implemented
1011 in libc.so as well. No need to call the function in libpthread. This
1012 change allowed to finally disable the incorrect and expensive handling
1013 of weak definition in ld.so.
1015 * Yet more PLT entries in libc.so have been removed. We finally arrived
1016 at the bare minimum. Startup times improved appropriately.
1018 * Support for the new Linux/x86 system call interface was added. The
1019 AT_SYSINFO auxiliary vector entry is recognized and handled.
1023 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1026 * iconv (the program and the interface) now accepts empty names (excluding
1027 options like //TRANSLIT) to mean "use charset of current locale".
1029 * localedef can now transliterate characters in strings which are not in
1030 the provided charmap. The information from the input locale is used.
1032 * Prelinking support was added for ELF targets. This requires additional
1033 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1035 * Read-only stdio streams now use mmap to speed up operation by eliminating
1036 copying and buffer underflows. To use add 'm' to the mode string of
1037 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1039 * The malloc functions were completely rewritten by Wolfram Gloger based
1040 on Doug Lea's malloc-2.7.0.c.
1042 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1043 implementation of regex.
1045 * Bruno Haible upgraded the iconv and locale implementation to support
1048 * Contents of the LC_* and LANG environment variables in the CEN style are
1049 not recognized anymore. It never was used. Change by Ulrich Drepper.
1051 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1052 thread-local storage (TLS) ABI on some platforms.
1053 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1055 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1056 EUC-JISX0213, and TSCII.
1058 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1059 BSD-compatible interface for getting all network interface addresses.
1060 Implementation for IPv4 by Roland McGrath.
1062 * Loading of locale data is faster due to the introduction of a locale
1063 archive. Implemented by Roland McGrath and Ulrich Drepper.
1065 * Startup times are significantly reduced by not using exported functions
1066 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1069 * Steven Munroe contributed a port to PowerPC64/Linux.
1073 * The Hurd now uses the GNU libio implementation of stdio rather than the
1074 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1076 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1077 with the same behavior as the Linux system call of the same name.
1081 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1082 128-bit long double format.
1084 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1085 IBM1161, and IBM1162 charsets.
1087 * Andreas Jaeger contributed a port to x86-64/Linux.
1089 * Peter Bruin contributed a port to PowerPC/Hurd.
1091 * libc functions using I/O streams now can handle wide-oriented streams
1094 * optimizations in the dynamic linker. Binaries created by recent binutils
1095 versions start up quicker due to reduced time spent on relocations.
1097 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1101 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1102 asinh, atanh, j0 for the 128-bit long double format.
1104 * Bruno Haible updated all the code handling Unicode in some form to
1105 support Unicode 3.1.
1107 * Speed of regex for single-byte locales is back to previous levels.
1108 Patch by Isamu Hasegawa.
1110 * Alpha, SPARC, and IA-64 now also using floating stacks.
1112 * Startup time of internationalized applications greatly improved through
1113 iconv cache. Use iconvconfig to generate the cache file.
1114 Contributed by Ulrich Drepper.
1116 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1117 severe performance problems. Patch by David Mosberger.
1119 * The Hurd port got a lot more functionality like AIO, various stdio
1120 extensions, etc. Mainly done by Roland McGrath.
1122 * mtrace can now lookup symbols in shared libraries.
1126 * Intel's IA-64 math library is largely integrated. It provides fast and
1127 accurate implementatations for most basic and standard math functions
1128 in float, double, and long double format.
1130 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1131 and asin for the 96-bit long double format and asin, log, tan for the
1132 128-bit long double format.
1134 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1135 The basic double functions exist today. Contributed by Abraham Ziv
1136 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1137 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1139 * An asynchronous name lookup library was added. The interface is designed
1140 after POSIX AIO. The proposal was circulated beforehand to get comments.
1141 No negative ones came in. Implemented by Ulrich Drepper.
1143 * Port to S390/64bit contributed by Martin Schwidefsky
1144 <schwidefsky@de.ibm.com>.
1146 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1147 of functions for Linux/IA-64.
1149 * The RPC code is now thread safe. Threads can now use the same service
1150 of different services at the same time. Patch by Eric Norum
1151 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1153 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1154 family of functions for Linux/S390.
1156 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1157 of functions for Linux/x86.
1159 * Port to Linux/CRIS contributed by Axis Communications.
1163 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1164 we can now check for namespace violations and missing declarations. The
1165 result is that almost all headers are now Unix-compliant (as defined in
1166 the upcoming XPG6). The negative side is that some programs might need
1167 corrections, too, if they depend on the incorrect form of the headers in
1168 previous versions which defined too many symbols and included too many
1171 * regex now handles multibyte character sets correctly.
1172 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1174 * iconv (the program) does now conform to the upcoming XPG6 and handles
1175 charmaps. Instead of the charset names the path of charmaps can be
1176 provided and the conversion happens based on this data.
1177 Contributed by Ulrich Drepper.
1179 * The locale program now provides detailed information about the installed
1184 only lists the names of the supported locales
1188 provides details such as country, language, and codeset name.
1189 Contributed by Ulrich Drepper.
1193 * The gencat program now parses the input file according to the charset
1194 selected by the LC_CTYPE category. This is important for stateful
1195 character sets. To make generating catalogs easier there is a way
1196 to overwrite the charset selected by the locale: before the first
1197 message or $ quote line the catalog can contain a line like
1199 $ codeset=ISO-8859-2
1201 to select the charset (ISO-8859-2 in this case).
1203 Implemented by Shinya Hanataka and Ulrich Drepper.
1205 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1206 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1207 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1209 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1210 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1212 * The LANGUAGE environment variable is now ignored unless the locale is
1213 changed from the default "C" locale.
1215 * The usual bug fixes.
1219 * Greg McGary added runtime support for bounds checking using gcc's
1220 new -fbounded-pointers option. ix86 target is complete. PowerPC
1223 * Thorsten Kukuk added secure mode support to nscd.
1225 * The Berkeley db libraries have been removed.
1227 Related, the nss_db module is now in a separate package since it
1228 obviously requires a database library being available.
1230 * Wide character I/O streams implemented by Ulrich Drepper.
1232 * Functions from the extended socket API added by Ulrich Drepper.
1234 * Functions feenableexcept and fedisableexcept to control the
1235 behaviour of individual exceptions have been added by Andreas Jaeger.
1237 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1239 * The resolver code has been updated from bind 8.2.3-T5B which supports
1240 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1243 This change could in some situations effect backward compatibility. Since
1244 now `_res' is a thread-local instead of a global variable, modifying it
1245 in one thread does not have any effect in other threads.
1247 The resolver library was also extended to allow IPv6 as the transport
1248 protocol for the requests. This work was done by Stig Venaas.
1250 * Compatibility code for K&R C compilers has been removed from the
1251 header files. A ISO C compiler is needed to use the library
1252 (conforming to either C89 or C99 standard).
1254 * Complete rewrite of the localedef program to support multibyte character
1255 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1256 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1257 Implemented by Ulrich Drepper.
1259 Bruno Haible significantly improved the generation and use of the data
1260 structures for the wide character tables.
1262 * Plural handling in gettext implemented by Ulrich Drepper.
1264 * The utmp daemon has been removed.
1266 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1268 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1271 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1273 * POSIX barriers implemented by Kaz Kylheku.
1275 * POSIX spawn function family implemented by Ulrich Drepper.
1277 * POSIX spinlocks are now available.
1279 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1281 * the configure option --enable-kernel=X.Y.Z allows to strip out
1282 compatibility for kernel versions before X.Y.Z. This is currently only
1283 implemented for Linux.
1285 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1286 field sin6_scope_id. This means that all programs using IPv6 should be
1287 recompiled. Don't expect binary compatibility with previous glibc
1290 * various conversion modules for IBM character sets contributed by
1293 * IA-64 port by Jes Sorensen and HJ Lu.
1307 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1309 * New xdr functions are added; some rpc functions are now 64bit clean.
1311 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1313 * Fixed known incompatibilities with glibc 2.0.
1315 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1317 * Optimized a number of functions (especially the ELF dynamic loader).
1319 * Update timezone data files.
1321 * lots of charmaps corrections
1323 * some new locale definitions and charmaps
1328 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1329 conform to POSIX member type requirements. Symbol versions have been
1330 adjusted as needed within the library, and for direct use by applications,
1331 but there is potential for problems if third-party libraries use
1332 struct timeval as part of their interface. This does not present
1333 a problem for X and other "essential" system libraries.
1335 * An additional locale model to support C++ Standard Library locale
1336 model and probably more was implemented by Ulrich Drepper.
1338 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1341 * Miles Bader provided the `argp' function family to support hierachical
1342 command line argument parsing, layered on top of getopt.
1344 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1346 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1349 * scanf recognizes the %a and %A format for scanning floating point numbers.
1351 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1352 information and interfaces for the available integer types.
1354 * about 130 new math functions were added to implement the ISO C9x math
1357 * the new header <complex.h> contains definitions of the complex math
1358 functions from ISO C 9X.
1360 * the new header <tgmath.h> defines generic macros to use complex or
1361 real valued functions.
1363 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1365 * Andreas Jaeger provided a test suite for the math library.
1367 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1369 * Ulrich Drepper added character set conversion functions (iconv).
1371 * Optimized string functions have been added.
1373 * The localedata addon is now part of glibc.
1375 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1377 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1378 daemon for NSS (nscd).
1380 Missing a better place here are some numbers on improvements. Under
1381 Linux 2.1.125 un-tar-ing the kernel sources takes
1385 using local files 12.19s 6.88s 22.91s
1387 using NIS 13.92s 8.91s 26.34s
1389 using NIS & nscd 10.37s 7.34s 25.30s
1391 using NIS+ 27.57s 30.37s 640.46s
1393 using NIS+ & nscd 10.25s 7.83s 26.51s
1395 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1397 Keep in mind that non-namelookup related operations dominate above times.
1398 It was just a common complain that using NIS+ unpacking the kernel is
1401 [1] The old nscd implementation is not available anymore since it was
1402 distributed with glibc up to version 2.0.98 and thus is now replaced.
1404 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1406 * Mark Kettenis provided a Hesiod NSS module.
1408 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1409 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1411 * rcmd can now handle netgroups (Dick Streefland).
1413 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1416 * Support for the IPv6 protocol has been added to the socket API, as per the
1417 latest draft standards.
1419 * Support for Linux 2.2 has been added.
1421 * Interface changes relative to the latest 2.0.x release:
1422 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1423 addseverity NEW: Unix98
1424 alphasort64 NEW: LFS
1425 argp_err_exit_status NEW: argp, GNU ext
1426 argp_error NEW: argp, GNU ext
1427 argp_failure NEW: argp, GNU ext
1428 argp_help NEW: argp, GNU ext
1429 argp_parse NEW: argp, GNU ext
1430 argp_program_bug_address NEW: argp, GNU ext
1431 argp_program_version NEW: argp, GNU ext
1432 argp_program_version_hook NEW: argp, GNU ext
1433 argp_state_help NEW: argp, GNU ext
1434 argp_usage NEW: argp, GNU ext
1435 authdes_create NEW: Secure RPC
1436 authdes_getucred NEW: Secure RPC
1437 authdes_pk_create NEW: Secure RPC
1438 backtrace NEW: GNU ext.
1439 backtrace_symbols NEW: GNU ext.
1440 backtrace_symbols_fd NEW: GNU ext.
1442 cacosf NEW: ISO C 9x
1443 cacosh NEW: ISO C 9x
1444 cacoshf NEW: ISO C 9x
1445 cacoshl NEW: ISO C 9x
1446 cacosl NEW: ISO C 9x
1453 casinf NEW: ISO C 9x
1454 casinh NEW: ISO C 9x
1455 casinhf NEW: ISO C 9x
1456 casinhl NEW: ISO C 9x
1457 casinl NEW: ISO C 9x
1459 catanf NEW: ISO C 9x
1460 catanh NEW: ISO C 9x
1461 catanhf NEW: ISO C 9x
1462 catanhl NEW: ISO C 9x
1463 catanl NEW: ISO C 9x
1464 cbc_crypt NEW: Secure RPC
1468 ccoshf NEW: ISO C 9x
1469 ccoshl NEW: ISO C 9x
1475 cimagf NEW: ISO C 9x
1476 cimagl NEW: ISO C 9x
1477 clearerr_locked REMOVED
1478 clntunix_create NEW: sunrpc ext
1480 clog10 NEW: ISO C 9x
1481 clog10f NEW: ISO C 9x
1482 clog10l NEW: ISO C 9x
1492 cprojf NEW: ISO C 9x
1493 cprojl NEW: ISO C 9x
1495 crealf NEW: ISO C 9x
1496 creall NEW: ISO C 9x
1501 csinhf NEW: ISO C 9x
1502 csinhl NEW: ISO C 9x
1505 csqrtf NEW: ISO C 9x
1506 csqrtl NEW: ISO C 9x
1510 ctanhf NEW: ISO C 9x
1511 ctanhl NEW: ISO C 9x
1513 des_setparity NEW: Secure RPC
1514 ecb_crypt NEW: Secure RPC
1515 endutxent NEW: Unix98
1517 exp10f NEW: ISO C 9x
1518 exp10l NEW: ISO C 9x
1522 fattach NEW: STREAMS
1523 fdetach NEW: STREAMS
1527 feclearexcept NEW: ISO C 9x
1528 fegetenv NEW: ISO C 9x
1529 fegetexceptflag NEW: ISO C 9x
1530 fegetround NEW: ISO C 9x
1531 feholdexcept NEW: ISO C 9x
1533 feraiseexcept NEW: ISO C 9x
1534 ferror_locked REMOVED
1535 fesetenv NEW: ISO C 9x
1536 fesetexceptflag NEW: ISO C 9x
1537 fesetround NEW: ISO C 9x
1538 fetestexcept NEW: ISO C 9x
1539 feupdateenv NEW: ISO C 9x
1540 fflush_locked REMOVED
1544 fgets_unlocked NEW: GNU ext.
1545 fileno_locked REMOVED
1557 fputc_locked REMOVED
1558 fputs_unlocked NEW: GNU ext.
1559 fread_unlocked NEW: GNU ext.
1564 fstatvfs NEW: Unix98
1568 ftruncate64 NEW: LFS
1570 fwrite_unlocked NEW: GNU ext.
1571 gai_strerror NEW: IPv6
1575 getchar_locked REMOVED
1577 getdate_err NEW: Unix98
1578 getdate_r NEW: GNU ext.
1580 getnameinfo NEW: IPv6
1581 getnetname NEW: Secure RPC
1582 getpmsg NEW: STREAMS
1583 getpt NEW: Unix98 PTY
1584 getrlimit64 NEW: LFS
1585 getutxent NEW: Unix98
1586 getutxid NEW: Unix98
1587 getutxline NEW: Unix98
1588 glob64 NEW: GNU ext.
1589 globfree64 NEW: GNU ext.
1590 gnu_get_libc_release NEW: GNU ext.
1591 gnu_get_libc_version NEW: GNU ext.
1592 grantpt NEW: Unix98 PTY
1593 host2netname NEW: Secure RPC
1595 iconv_close NEW: iconv
1596 iconv_open NEW: iconv
1597 if_freenameindex NEW: IPv6
1598 if_indextoname NEW: IPv6
1599 if_nameindex NEW: IPv6
1600 if_nametoindex NEW: IPv6
1601 in6addr_any NEW: IPv6
1602 in6addr_loopback NEW: IPv6
1603 inet6_isipv4mapped NEW: IPv6
1604 isastream NEW: STREAMS
1605 iswblank NEW: GNU ext.
1606 key_decryptsession NEW: Secure RPC
1607 key_decryptsession_pk NEW: Secure RPC
1608 key_encryptsession NEW: Secure RPC
1609 key_encryptsession_pk NEW: Secure RPC
1610 key_gendes NEW: Secure RPC
1611 key_get_conv NEW: Secure RPC
1612 key_secretkey_is_set NEW: Secure RPC
1613 key_setnet NEW: Secure RPC
1614 key_setsecret NEW: Secure RPC
1615 llrint NEW: ISO C 9x
1616 llrintf NEW: ISO C 9x
1617 llrintl NEW: ISO C 9x
1618 llround NEW: ISO C 9x
1619 llroundf NEW: ISO C 9x
1620 llroundl NEW: ISO C 9x
1625 lrintf NEW: ISO C 9x
1626 lrintl NEW: ISO C 9x
1627 lround NEW: ISO C 9x
1628 lroundf NEW: ISO C 9x
1629 lroundl NEW: ISO C 9x
1631 makecontext NEW: Unix98
1632 mempcpy NEW: GNU ext.
1635 modify_ldt NEW: kernel
1639 nearbyint NEW: ISO C 9x
1640 nearbyintf NEW: ISO C 9x
1641 nearbyintl NEW: ISO C 9x
1642 netname2host NEW: Secure RPC
1643 netname2user NEW: Secure RPC
1644 nexttoward NEW: ISO C 9x
1645 nexttowardf NEW: ISO C 9x
1646 nexttowardl NEW: ISO C 9x
1650 passwd2des NEW: Secure RPC
1652 pow10f NEW: GNU ext.
1653 pow10l NEW: GNU ext.
1656 printf_size NEW: GNU ext.
1657 printf_size_info NEW: GNU ext.
1658 profil_counter REMOVED
1659 pthread_mutexattr_getkind_np REPLACED
1660 pthread_mutexattr_setkind_np REPLACED
1661 ptsname NEW: Unix98 PTY
1662 ptsname_r NEW: Unix98 PTY
1664 putchar_locked REMOVED
1665 putgrent NEW: GNU ext.
1667 putpmsg NEW: STREAMS
1668 pututxline NEW: Unix98
1672 readdir64_r NEW: LFS
1673 remquo NEW: ISO C 9x
1674 remquof NEW: ISO C 9x
1675 remquol NEW: ISO C 9x
1677 roundf NEW: ISO C 9x
1678 roundl NEW: ISO C 9x
1680 scalbln NEW: ISO C 9x
1681 scalblnf NEW: ISO C 9x
1682 scalblnl NEW: ISO C 9x
1684 sendfile NEW: kernel
1685 setcontext NEW: Unix98
1686 setrlimit64 NEW: LFS
1687 setutxent NEW: Unix98
1689 sigignore NEW: Unix98
1690 sigqueue NEW: POSIX.1b
1691 sigrelse NEW: Unix98
1692 sigset NEW: POSIX.1b
1693 sigtimedwait NEW: POSIX.1b
1694 sigwaitinfo NEW: POSIX.1b
1695 sincos NEW: GNU ext.
1696 sincosf NEW: GNU ext.
1697 sincosl NEW: GNU ext.
1701 strcasestr NEW: GNU ext.
1702 strtoimax NEW: ISO C 9x
1703 strtoumax NEW: ISO C 9x
1704 strverscmp NEW: GNU ext.
1705 svcauthdes_stats NEW: Secure RPC
1706 svcunix_create NEW: sunrpc etx
1707 svcunixfd_create NEW: sunrpc ext
1708 swapcontext NEW: Unix98
1709 tcgetsid NEW: Unix98 PTY
1710 tdestroy NEW: GNU ext.
1711 tgamma NEW: ISO C 9x
1712 tgammaf NEW: ISO C 9x
1713 tgammal NEW: ISO C 9x
1717 truncf NEW: ISO C 9x
1718 truncl NEW: ISO C 9x
1720 unlockpt NEW: Unix98 PTY
1721 updwtmpx NEW: Unix98
1722 user2netname NEW: Secure RPC
1723 utmpxname NEW: Unix98
1724 versionsort NEW: GNU ext.
1725 versionsort64 NEW: GNU ext.
1727 wcscasecmp NEW: GNU ext.
1728 wcsncasecmp NEW: GNU ext.
1729 wcsnlen NEW: GNU ext.
1730 wcstoimax NEW: ISO C 9x
1731 wcstoll NEW: ISO C 9x
1732 wcstoull NEW: ISO C 9x
1733 wcstoumax NEW: ISO C 9x
1735 wordexp NEW: POSIX.2
1736 wordfree NEW: POSIX.2
1737 write_profiling REMOVED
1738 xdecrypt NEW: Secure RPC
1739 xdr_authdes_cred NEW: Secure RPC
1740 xdr_authdes_verf NEW: Secure RPC
1741 xdr_cryptkeyarg NEW: Secure RPC
1742 xdr_cryptkeyarg2 NEW: Secure RPC
1743 xdr_cryptkeyres NEW: Secure RPC
1744 xdr_getcredres NEW: Secure RPC
1745 xdr_key_netstarg NEW: Secure RPC
1746 xdr_key_netstres NEW: Secure RPC
1747 xdr_keybuf NEW: Secure RPC
1748 xdr_keystatus NEW: Secure RPC
1749 xdr_netnamestr NEW: Secure RPC
1750 xdr_sizeof NEW: Secure RPC
1751 xdr_unixcred NEW: sunrpc ext
1752 xencrypt NEW: Secure RPC
1753 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1764 * inet_ntoa is thread-safe
1766 * updwtmp is moved from libutil to libc
1768 * rewrite of cbrt function
1770 * update of timezone data
1784 * add atoll function
1786 * fix complex problems in Berkeley DB code
1788 * fix math functions
1792 * fixed lots of header problems (especially Linux/GNU specific)
1794 * dynamic loader preserves all registers
1796 * Roland McGrath provided support for handling of auxiliary objects in
1797 the ELF dynamic loader.
1799 * support for parallel builds is improved
1803 * GNU extensions are no longer declared by default. To enable them you
1804 must define the macro `_GNU_SOURCE' in your program or compile with
1807 * The library has changed from using GNU ld symbol aliases to using weak
1808 symbols where available. The ELF object file format supports weak
1809 symbols; GNU ld also supports weak symbols in the a.out format. (There
1810 is also now support for other GNU ld extensions in ELF. Use the
1811 `--with-elf' option to configure to indicate you have ELF, and
1812 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1813 of many files which contained only symbol aliases, reducing the size of
1814 the source and the compiled library; many other files were renamed to
1815 less cryptic names previously occupied by the symbol alias files.
1816 There is a new header file <elf.h> for programs which operate on
1817 files in the ELF format.
1819 * Converted to Autoconf version 2, so `configure' has more options.
1820 Run `configure --help' to see the details.
1822 * The library can now be configured to build profiling, highly-optimized
1823 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1824 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1825 `configure' enable building these extra libraries. The shared library is
1826 built by default when using both ELF and GNU ld. When shared libraries
1827 are enabled, the new library `-ldl' is available for arbitrary run-time
1828 loading of shared objects; its interface is defined in <dlfcn.h>. The
1829 new header file <link.h> gives access to the internals of the run-time
1830 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1831 application of same name on other systems and it provides information
1832 about dynamically linked binaries.
1834 * The C library now provides the run-time support code for profiling
1835 executables compiled with `-pg'. Programs can control the profiling code
1836 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1837 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1838 the support for this file format was contributed by David Mosberger-Tang.
1840 * The math code has been replaced with a math library based on fdlibm from
1841 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1842 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1843 functions. The math functions now reside in a separate library, so
1844 programs using them will need to use `-lm' their linking commands.
1846 * John C. Bowman contributed optimized ix87 assembler inline functions.
1848 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1849 mechanism similar to that found in Solaris 2. This is now used for the
1850 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1851 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1852 file controls what services are used for each individual database. This
1853 works by loading shared libraries with names specified in `nsswitch.conf',
1854 so service modules can be changed or added at any time without even
1855 relinking any program. Currently there are the file, db, and NIS based
1856 NSS services available.
1858 * The new functions `strtoq' and `strtouq' parse integer values from
1859 strings, like `strtol' and `strtoul', but they return `long long int' and
1860 `unsigned long long int' values, respectively (64-bit quantities).
1862 * The new functions `strtof' and `strtold' parse floating-point values from
1863 strings, like `strtod', but they return `float' and `long double' values,
1864 respectively (on some machines `double' and `long double' are the same).
1866 * Ulrich Drepper has contributed new implementations of the floating-point
1867 printing and reading code used in the `printf' family of functions and
1868 `strtod', `strtof', and `strtold'. These new functions are perfectly
1869 accurate, and much faster than the old ones.
1871 * The implementation of the POSIX locale model was completely rewritten by
1872 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1873 to compile the POSIX locale definition.
1875 * The former dummy implementations of the strcoll and strxfrm function are
1876 now replaced by fully functional code contributed by Ulrich Drepper. The
1877 collation information comes from the POSIX locale definitions.
1879 * The new header <langinfo.h> defines an interface for accessing
1880 various locale-dependent data (using the locale chosen with `setlocale').
1882 * Ulrich Drepper has contributed a new suite of functions for operation on
1883 wide-character and multibyte-character strings, in <wchar.h>;
1884 and classification and case conversion of wide characters, in <wctype.h>.
1885 These new functions are conforming to the ISO C, Amendement 1 specification.
1887 * There is now a second implementation of the standard I/O library available.
1888 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1889 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1891 * You can now use positional parameter specifications in format strings
1892 for the `printf' and `scanf' families of functions. For example,
1893 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1894 ``Number 6, Mr Jones''. This is mainly useful when providing different
1895 format strings for different languages, whose grammars may dictate
1896 different orderings of the values being printed. To support this
1897 feature, the interface for `register_printf_handler' has changed; see
1898 the header file <printf.h> for details.
1900 * The `printf' and `scanf' families of functions now understand a new
1901 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1902 to group numbers as indicated by the locale; for `scanf' and friends, this
1903 says to accept as valid only a number with all the proper grouping
1904 separators in the right places. In the default "C" locale, numbers are
1905 not grouped; but locales for specific countries will define the usual
1906 conventions (i.e. separate thousands with `,' in the US locale).
1908 * The pgrp functions have been regularized, slightly incompatibly but much
1909 less confusingly. The core functions are now `getpgid' and `setpgid',
1910 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1911 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1912 provided for compatibility. There is no longer an incompatible `getpgrp'
1913 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1915 * The new header file <fts.h> and suite of functions simplify programs that
1916 operate on directory trees. This code comes from 4.4 BSD.
1918 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1919 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1920 NSS scheme used in glibc.
1922 * There is a new malloc debugging hook `__memalign_hook'.
1924 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1925 `unsigned int' in <sys/types.h>. These are for compatibility only and
1926 their use is discouraged.
1928 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1929 done differently, so that it works even without GNU ld.
1931 * New function `euidaccess' checks allowed access to a file like `access',
1932 but using the effective IDs instead of the real IDs.
1934 * The time zone data files have been updated for the latest and greatest
1935 local time conventions of the countries of the world.
1937 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1940 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1941 for formatting floating-point numbers. They are provided only for
1942 compatibility; new programs should use `sprintf' instead. There are
1943 also equivalent function for the `long double' floating-point type and
1944 all functions also exist in a reentrant form.
1946 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1947 functions for maintaining the login-record files (primarily of use to
1948 system programs such as `login'), and convenient functions for
1949 allocating and initializing a pseudo-terminal (pty) device.
1951 * Ulrich Drepper has contributed new support for System V style
1952 shared memory and IPC on systems that support it.
1954 * Ulrich Drepper has contributed several miscellaneous new functions found
1955 in System V: The `hsearch' family of functions provide an effective
1956 implementation of hash tables; `a64l' and `l64a' provide a very simple
1957 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1960 * Ulrich Drepper has contributed new reentrant counterparts for the
1961 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1963 * Ulrich Drepper has contributed new, highly-optimized versions of several
1964 string functions for the i486/Pentium family of processors.
1966 * Ulrich Drepper has updated the Linux-specific code, based largely
1967 on work done in Hongjiu Lu's version of GNU libc for Linux.
1968 The GNU library now supports Linux versions 2.0.10 and later,
1969 using the ELF object file format (i[3456]86-*-linux).
1971 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1973 * David Mosberger-Tang and Richard Henderson have ported the C library
1974 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1975 dynamic linking support for ELF/Alpha.
1977 * Richard Henderson contributed several Alpha optimized assembler function
1978 for arithmetic and string handling.
1980 * Ulrich Drepper has contributed a new set of message catalog functions to
1981 support multiple languages using the <libintl.h> interface, for use with
1982 his new package GNU gettext. Translation volunteers have contributed
1983 catalogs of the library's messages in Spanish, German, and Korean.
1985 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1986 program and the `catgets' function for reading the catalog files it
1987 creates. (The <libintl.h> interface is preferred; we include the
1988 <nl_types.h> interface using `catgets' only for source compatibility with
1989 programs already written to use it.)
1991 * New header file <values.h> gives SVID-compatible names for <limits.h>
1994 * Various new macros, declarations, and small header files for compatibility
1997 * New function `group_member' is a convenient way to check if a process has
1998 a given effective group ID.
2000 * When using GCC 2.7 and later, the socket functions are now declared in a
2001 special way so that passing an argument of type `struct sockaddr_in *',
2002 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2003 `struct sockaddr *' type, does not generate a type-clash warning.
2005 * New function `error' declared in header file <error.h> is a convenient
2006 function for printing error messages and optionally exiting; this is the
2007 canonical function used in GNU programs. The new functions `err', `warn',
2008 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2009 doing the same thing.
2011 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2012 POSIX.2 `glob' function to do ~ and {...} expansion.
2014 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2015 `clearenv' which is used in POSIX.9 is also available.
2017 * New function `getsid' returns session ID number on systems that support it.
2019 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2020 files <db.h> and <mpool.h> provide a rich set of functions for several
2021 types of simple databases stored in memory and in files, and <ndbm.h> is
2022 an old `ndbm'-compatible interface using the `db' functions. Link with
2023 `-ldb' to get these functions.
2025 * New macro `strdupa' copies a string like `strdup', but uses local stack
2026 space from `alloca' instead of dynamic heap space from `malloc'.
2028 * New function `strnlen' is like `strlen' but searches only a given maximum
2029 number of characters for the null terminator. `stpncpy', `strndup' and
2030 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2033 * New function `statfs' in header <sys/statfs.h>.
2035 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2036 provide convenient functions for operating on blocks of null-terminated
2039 * A new suite of functions in <utmp.h> handle all the details of reading
2040 and writing the utmp file.
2042 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2045 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2046 completely POSIX compliant and also implemented the extended functionality
2047 to handle alternate digit representation and alternate era date formats.
2049 * Ulrich Drepper provided an implementation of the `strptime' function
2050 defined in XPG4.2 which transforms a string into a `struct tm' value.
2052 * Paul Eggert provided the tzselect shell script as part of the timezone
2053 code. The shell script makes it easy to select the correct timezone
2056 * The implementation of the malloc family of functions is completely replaced
2057 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2058 The implementation uses the mmap function (if available) and it is
2059 optimized for the use in multi threaded programs.
2061 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2062 functions. This new functionality is usable by specifying a special
2063 salt string and it is compatible with implementation on *BSD systems.
2065 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2066 `getsubopt' to handle second level command line options, `bsd_signal'
2067 to access BSD style `signal' functionality, the obsolete `regexp' style
2070 * the `lchown' function is available on system which support this
2073 * The implementation of the shadow password handling function was contributed
2076 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2078 * POSIX.1g support was added. The <sys/select.h> header is available,
2079 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2080 implementation of `getaddrinfo'.
2084 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2086 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2087 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2089 * The new function `daemon' from 4.4 BSD is useful for server programs that
2090 want to put themselves in the background.
2092 * Joel Sherrill has contributed support for several standalone boards that
2093 run without an operating system.
2095 * `printf', `scanf' and friends now accept a `q' type modifier for long
2096 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2098 * All of the code taken from BSD (notably most of the math and networking
2099 routines) has been updated from the BSD 4.4-Lite release.
2101 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2103 * The new functions `getdomainname' and `setdomainname' fetch or change the
2104 YP/NIS domain name. These are system calls which exist on systems which
2107 * The time zone data files have been updated for the latest international
2110 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2111 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2115 * The C library now includes support for Sun RPC, from Sun's free
2116 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2117 are included. (There is still no support for YP.)
2119 * Tom Quinn has contributed a port of the C library to SGI machines running
2120 Irix 4 (mips-sgi-irix4).
2122 * The new `lockf' function is a simplified interface to the locking
2123 facilities of `fcntl', included for compatibility.
2125 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2127 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2129 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2132 * The error message printed by `assert' for a failed assertion now includes
2133 the name of the program (if using GNU ld) and the name of the calling
2134 function (with versions of GCC that support this).
2136 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2138 * The library now includes the <sys/mman.h> header file and memory
2139 management functions `mmap', `munmap', `mprotect', `msync', and
2140 `madvise', on systems that support those facilities.
2142 * The interface for `mcheck' has changed slightly: the function called to
2143 abort the program when an allocation inconsistency is detected now takes
2144 an argument that indicates the type of failure. The new function
2145 `mprobe' lets you request a consistency check for a particular block at
2146 any time (checks are normally done only when you call `free' or `realloc'
2149 * It is now possible to easily cross-compile the C library, building on one
2150 system a library to run on another machine and/or operating system. All
2151 you need to do is set the variable `HOST_CC' in `configparms' to the
2152 native compiler for programs to run on the machine you are building on (a
2153 few generator programs are used on Unix systems); set `CC' to the
2156 * The new function `fexecve' (only implemented on the GNU system) executes
2157 a program file given a file descriptor already open on the file.
2161 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2162 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2164 * You can set the variable `libprefix' in `configparms' to specify a prefix
2165 to be prepended to installed library files; this makes it easy to install
2166 the GNU C library to be linked as `-lgnuc' or whatever.
2168 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2169 copies a limited number of characters from a string, and returns the
2170 address of the last character written.
2172 * You no longer need to check for whether the installed `stddef.h' is
2173 compatible with the GNU C library. configure now checks for you.
2175 * You can now define a per-stream `fileno' function to convert the
2176 stream's cookie into an integral file descriptor.
2178 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2179 allocates zero bytes of storage, and returns a unique pointer which
2180 you can pass to `realloc' or `free'. The behavior is undefined if
2181 you dereference this pointer.
2183 * The C library now runs on Sony NEWS m68k machines running either
2184 NewsOS 3 or NewsOS 4.
2186 * The new `syscall' function is a system-dependent primitive function
2187 for invoking system calls. It has the canonical behavior on Unix
2188 systems, including unreliable return values for some calls (such as
2189 `pipe', `fork' and `getppid').
2191 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2192 to `EAGAIN', which is the preferred name. On systems whose kernels
2193 use two distinct codes, the C library now translates EWOULDBLOCK to
2194 EAGAIN in every system call function.
2198 * The GNU C Library Reference Manual is now distributed with the library.
2199 `make dvi' will produce a DVI file of the printed manual.
2200 `make info' will produce Info files that you can read on line using C-h i
2201 in Emacs or the `info' program.
2202 Please send comments on the manual to bug-glibc-manual@gnu.org.
2204 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2206 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2208 * Jason Merrill has contributed a port to the Sequent Symmetry running
2209 Dynix version 3 (i386-sequent-dynix).
2211 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2212 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2214 * New function `memory_warnings' lets you arrange to get warnings when
2215 malloc is running out of memory to allocate, like Emacs gives you.
2217 * The C library now contains the relocating allocator used in Emacs 19 for
2218 its editing buffers. This allocator (ralloc) minimizes allocation
2219 overhead and fragmentation by moving allocated regions around whenever it
2220 needs to. You always refer to a ralloc'd region with a "handle" (a
2221 pointer to a pointer--an object of type `void **').
2223 * There is a new `printf' format: `%m' gives you the string corresponding
2224 to the error code in `errno'.
2226 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2227 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2228 pass, the `a' modifier says to fill in a `char **' you pass with a
2231 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2232 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2233 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2235 * `mkstemp' is a traditional Unix function to atomically create and open a
2236 uniquely-named temporary file.
2240 * The standard location for the file that says what the local timezone is
2241 has changed again. It is now `/usr/local/etc/localtime' (or more
2242 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2244 * The distribution no longer contains any files with names longer than 14
2247 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2248 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2250 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2254 * The configuration process has changed quite a bit. The `configure'
2255 script is now used just like the configuration scripts for other GNU
2256 packages. The `sysdeps' directory hierarchy is much rearranged.
2257 The file `INSTALL' explains the new scheme in detail.
2259 * The header files no longer need to be processed into ANSI C and
2260 traditional C versions. There is just one set of files to install, and
2261 it will work with ANSI or old C compilers (including `gcc -traditional').
2263 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2264 MIPS DECStation running Ultrix 4.
2266 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2267 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2268 made itself into a shared library.
2270 * Yet further improved support for the i386, running 4.3 BSD-like systems
2271 (such as Mach 3 with the Unix single-server), or System V.
2273 * New function `strncasecmp' to do case-insensitive string comparison
2274 with limited length.
2276 * New function `strsep' is a reentrant alternative to `strtok'.
2278 * New functions `scandir' and `alphasort' for searching directories.
2280 * New function `setenv' is a better interface to `putenv'.
2282 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2283 function for traversing a directory tree.
2285 * The GNU obstack package is now also part of the C library.
2286 The new function `open_obstack_stream' creates a stdio stream that
2287 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2288 formatted output directly to an obstack.
2290 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2291 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2293 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2295 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2296 things to your strings.
2298 * There are some new test programs: test-fseek, testmb, and testrand.
2300 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2301 These ports are not finished, but are a good starting place for really
2302 supporting those systems.
2304 * `/etc/localtime' is now the standard location for the file that says what
2305 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2306 This follows the general principle that `/etc' is the place for all local
2307 configuration files.
2309 * The C library header files now use `extern "C"' when used by the C++
2310 compiler, so the C library should now work with C++ code.
2312 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2313 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2316 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2317 function which uses the `merge sort' algorithm, and is said to be
2318 significantly faster than the old GNU `qsort' function. Merge sort is
2319 now the standard `qsort' function. The new algorithm can require a lot
2320 of temporary storage; so, the old sorting function is called when the
2321 required storage is not available.
2323 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2324 provides the Unix `crypt' function, plus some other entry points.
2326 * The code and header files taken from 4.4 BSD have been updated with the
2327 latest files released from Berkeley.
2329 ----------------------------------------------------------------------
2330 Copyright information:
2332 Copyright (C) 1992-2013 Free Software Foundation, Inc.
2334 Permission is granted to anyone to make or distribute verbatim copies
2335 of this document as received, in any medium, provided that the
2336 copyright notice and this permission notice are preserved,
2337 thus giving the recipient permission to redistribute in turn.
2339 Permission is granted to distribute modified versions
2340 of this document, or of portions of it,
2341 under the above conditions, provided also that they
2342 carry prominent notices stating who last changed them.
2345 version-control: never
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