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, 387, 431, 832, 2801, 7003, 9954, 10253, 10278, 11087, 11157, 11214,
13 13028, 13982, 13985, 14029, 14143, 14155, 14547, 14699, 14752, 14876,
14 14910, 15048, 15218, 15277, 15308, 15362, 15374, 15400, 15427, 15483,
15 15522, 15531, 15532, 15601, 15608, 15609, 15610, 15632, 15640, 15670,
16 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748, 15749, 15754,
17 15760, 15763, 15764, 15797, 15799, 15825, 15844, 15847, 15849, 15855,
18 15856, 15857, 15859, 15867, 15886, 15887, 15890, 15892, 15893, 15895,
19 15897, 15905, 15909, 15917, 15919, 15921, 15923, 15939, 15948, 15963,
20 15966, 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16041, 16055,
21 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144, 16146,
22 16150, 16151, 16153, 16167, 16172, 16245.
24 * The public headers no longer use __unused nor __block. This change is to
25 support compiling programs that are derived from BSD sources and use
26 __unused internally, and to support compiling with Clang's -fblock
27 extension which uses __block.
29 * CVE-2012-4412 The strcoll implementation caches indices and rules for
30 large collation sequences to optimize multiple passes. This cache
31 computation may overflow for large collation sequences and may cause a
32 stack or buffer overflow. This is now fixed to use a slower algorithm
33 which does not use a cache if there is an integer overflow.
35 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
36 rules for large collation sequences to optimize multiple passes and falls
37 back to alloca if malloc fails, resulting in a possible stack overflow.
38 The implementation now falls back to an uncached collation sequence lookup
41 * CVE-2013-4788 The pointer guard used for pointer mangling was not
42 initialized for static applications resulting in the security feature
43 being disabled. The pointer guard is now correctly initialized to a
44 random value for static applications. Existing static applications need
45 to be recompiled to take advantage of the fix (bug 15754).
47 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
48 to the d_name member of struct dirent, or omit the terminating NUL
49 character. (Bugzilla #14699).
51 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
52 aligned_alloc functions could allocate too few bytes or corrupt the
53 heap when passed very large allocation size values (Bugzilla #15855,
56 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
57 for AF_INET6 has been fixed (Bugzilla #16072).
59 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
60 pap_CW, quz_PE, the_NP.
62 * Substantially revised locales: gd_GB, ht_HT
64 * The LC_ADDRESS field was updated to support country_car for almost all
67 * ISO 1427 definitions were updated.
69 * ISO 3166 definitions were updated.
71 * The localedef utility now supports --big-endian and --little-endian
72 command-line options to generate locales for a different system from that
73 for which the C library was built.
75 * Binary locale files now only depend on the endianness of the system for
76 which they are generated and not on other properties of that system. As a
77 consequence, binary files generated with new localedef may be incompatible
78 with old versions of the GNU C Library, and binary files generated with
79 old localedef may be incompatible with this version of the GNU C Library,
80 in the following circumstances:
82 + Locale files may be incompatible on m68k systems.
84 + Locale archive files (but not separate files for individual locales) may
85 be incompatible on systems where plain "char" is signed.
87 * The configure option --disable-versioning has been removed. Builds with
88 --disable-versioning had not worked for several years.
90 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
91 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
93 * SystemTap probes for malloc have been introduced.
95 * Support for powerpc64le has been added.
97 * The soft-float powerpc port now supports e500 processors.
101 * The following bugs are resolved with this release:
103 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
104 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
105 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
106 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
107 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
108 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
109 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
110 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
111 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
112 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
113 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
114 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
115 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
118 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
119 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
120 Distributions can re-enable building and using pt_chown via the new configure
121 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
122 considerable security risks and should only be used if the distribution
123 understands and accepts the risks.
125 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
128 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
129 fixed (Bugzilla #15330).
131 * Add support for calling C++11 thread_local object destructors on thread
132 and program exit. This needs compiler support for offloading C++11
133 destructor calls to glibc.
135 * Improved worst case performance of libm functions with double inputs and
138 * Support for priority inherited mutexes in pthread condition variables on
139 non-x86 architectures.
141 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
143 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
145 * Optimized string functions for ARM. Implemented by Will Newton and
148 * Optimized libm functions for SPARC. Implemented by David S. Miller.
150 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
153 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
154 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
156 * Added a benchmark framework to track performance of functions in glibc.
158 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
159 It is based on draft TS 18661 and currently enabled as a GNU extension.
161 * On Linux, the clock function now uses the clock_gettime system call
162 for improved precision, rather than old times system call.
164 * Added new API functions pthread_getattr_default_np and
165 pthread_setattr_default_np to get and set the default pthread
166 attributes of a process.
168 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
169 This may improve lock scaling of existing programs on TSX capable systems.
170 When the --enable-lock-elision=yes parameter is specified at configure
171 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
174 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
175 availability). Implemented by Ryan S. Arnold.
177 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
181 * The following bugs are resolved with this release:
183 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
184 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
185 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
186 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
187 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
188 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
189 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
190 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
191 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
192 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
193 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
194 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
195 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
196 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
197 14879, 14889, 14893, 14898, 14914.
199 * Optimization of memcpy for MIPS.
201 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
202 EMFILE has been fixed (Bugzilla #14889).
204 * The add-on ports collection is now distributed in the "ports" subdirectory
205 of the main GNU C Library distribution, rather than separately.
207 * Port to ARM AArch64 contributed by Linaro.
209 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
210 Optimized versions of memcpy, memset, and memcmp added for System z10 and
212 Implemented by Andreas Krebbel.
214 * The new function secure_getenv allows secure access to the environment,
215 returning NULL if running in a SUID/SGID process. This function replaces
216 the internal function __secure_getenv.
218 * SystemTap static probes have been added into the dynamic linker.
219 Implemented by Gary Benson.
221 * Optimizations of string functions strstr, strcasestr and memmem.
222 Implemented by Maxim Kuvyrkov.
224 * The minimum Linux kernel version that this version of the GNU C Library
225 can be used with is 2.6.16.
227 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
228 powerpc POWER7. Implemented by Will Schmidt.
230 * New configure option --disable-nscd builds the C library such that it
231 never attempts to contact the Name Service Caching Daemon (nscd).
232 New configure option --disable-build-nscd avoids building nscd itself;
233 this is the default if --disable-nscd is used.
235 * Improved support for cross-compilation, including cross-testing and
236 bootstrap builds without a previously built glibc.
238 * Several testsuite tests are now able to test multiple IFUNC variants of an
239 interface, rather than just testing the one that would be chooen by
242 * New configure options --with-bugurl and --with-pkgversion, for
243 distributors to use to embed their bug-reporting and package version
244 information in --help and --version output.
246 * The ttyname and ttyname_r functions on Linux now fall back to searching for
247 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
248 allows creation of chroots without the procfs mounted on /proc.
250 * The `crypt' function now fails if passed salt bytes that violate the
251 specification for those values. On Linux, the `crypt' function will
252 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
253 enabled, and fail on encrypted strings using the MD5 or DES algorithm
254 when the mode is enabled.
256 * The `clock_*' suite of functions (declared in <time.h>) is now available
257 directly in the main C library. Previously it was necessary to link with
258 -lrt to use these functions. This change has the effect that a
259 single-threaded program that uses a function such as `clock_gettime' (and
260 is not linked with -lrt) will no longer implicitly load the pthreads
261 library at runtime and so will not suffer the overheads associated with
262 multi-thread support in other code such as the C++ runtime library.
264 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
269 * The following bugs are resolved with this release:
271 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
272 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
273 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
274 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
275 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
276 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
277 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
278 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
279 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
280 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
281 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
282 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
283 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
284 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
285 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
286 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
287 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
288 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
289 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
290 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
291 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
292 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
295 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
296 configuring glibc with:
297 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
298 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
299 Implemented by H.J. Lu.
303 + define static_assert
305 + do not declare gets
307 + declare at_quick_exit and quick_exit also for ISO C11
309 + aligned_alloc. NB: The code is deliberately allows the size parameter
310 to not be a multiple of the alignment. This is a moronic requirement
311 in the standard but it is only a requirement on the caller, not the
316 + uchar.h support added
318 + CMPLX, CMPLXF, CMPLXL added
320 Implemented by Ulrich Drepper.
322 * Support for the IA-64 has been moved to ports.
324 * Remove support for anything but ELF binary format
326 * Checking versions of poll, ppoll added.
327 Implemented by Ulrich Drepper.
329 * More generic and 64-bit performance optimizations to math functions.
330 Implemented by Ulrich Drepper.
332 * New configure option --enable-obsolete-rpc makes the deprecated RPC
333 headers and functions available at compile time as they were before
334 version 2.14. This option will be removed at some time in the future
335 after the TI-RPC library becomes fully sufficient for the needs of
336 existing applications.
338 * Compatibility code for Linux kernel versions before 2.4 has been removed.
339 Note that glibc is not expected to work with any Linux kernel version
342 * New header <sys/auxv.h> and function getauxval allowing easy access to
343 the AT_* key-value pairs passed from the Linux kernel. The header also
344 defines the HWCAP_* bits associated with the AT_HWCAP key.
346 * New locales: mag_IN
348 * New configure option --enable-systemtap builds SystemTap static probes
349 into libc for setjmp and longjmp and into libpthread for various operations.
350 So far the setjmp/longjmp probes and some of the libpthread probes are
351 provided only for i*86 and x86_64.
352 Implemented by Roland McGrath and Rayson Ho.
354 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
356 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
359 * More optimized functions for SPARC. Implemented by David S. Miller.
361 * Improved support for cross-compilation, especially bootstrap builds
362 without a previously built glibc.
364 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
365 Chris Metcalf from Tilera.
367 * Support for the old ARM ABI has been removed from ports. Only the EABI is
368 now supported for ARM processors.
370 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
371 as the name of the dynamic linker, to distinguish it from the
372 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
374 * Support for CRIS has been removed from ports.
376 * A new class of installed header has been documented for low-level
377 platform-specific functionality. PowerPC added the first instance with a
378 function to provide time base register access. Contributed by Tulio
379 Magno Quites Machado Filho.
381 * ix86 configurations now install header files that are consistent with
382 what x86-64 configurations install. These same header files can be used
383 for -m32, -m64, or -mx32 builds.
384 Contributed by H.J. Lu.
386 * Math library bug fixes. A thorough audit of all open math library bugs was
387 conducted by Joseph Myers. Significant progress was made on many math
388 library bugs resulting in more accurate exceptions and function results.
389 Many thanks to all those that contributed including Andreas Jaeger for his
390 patch review and work on the x87 trigonometric instruction issues.
392 * Timezone data is no longer installed. Timezone-related binaries and scripts
393 will continue to be installed. Users should obtain their timezone data from
394 their distribution provider or from the tzdata package at
395 <ftp://munnari.oz.au/pub/>.
399 * The following bugs are resolved with this release:
401 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
402 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
403 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
404 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
405 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
406 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
407 13484, 13506, 13515, 13523, 13524, 13538, 13540
409 * New program pldd to list loaded object of a process
410 Implemented by Ulrich Drepper.
412 * Add nss_db support back to glibc. No more dependency on Berkeley db
413 and support for initgroups lookups.
414 Implemented by Ulrich Drepper.
416 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
417 Contributed by HJ Lu.
419 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
420 Contributed by HJ Lu.
422 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
423 on x86-32 and x86-64.
424 Contributed by Liubov Dmitrieva.
426 * Optimized strchr and strrchr for SSE on x86-32.
427 Contributed by Liubov Dmitrieva.
429 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
430 for x86-64 and x86-32.
431 Contributed by Liubov Dmitrieva.
433 * New interfaces: scandirat, scandirat64
434 Implemented by Ulrich Drepper.
436 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
437 Implemented by Ulrich Drepper.
439 * nscd now also caches the netgroup database.
440 Implemented by Ulrich Drepper.
442 * Integrate libm with gcc's -ffinite-math-only option.
443 Implemented by Ulrich Drepper.
445 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
446 to math functions. Implemented by Ulrich Drepper.
448 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
449 Implemented by Ulrich Drepper.
451 * New Linux interfaces: process_vm_readv, process_vm_writev
453 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
454 Implemented by Ulrich Drepper.
456 * Optimized nearbyint and strcasecmp for PPC.
457 Implemented by Adhemerval Zanella.
459 * New locales: bho_IN, unm_US, es_CU, ta_LK
463 * The following bugs are resolved with this release:
465 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
466 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
467 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
468 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
469 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
470 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
471 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
472 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
473 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
474 12795, 12811, 12813, 12814, 12841
476 * The RPC implementation in libc is obsoleted. Old programs keep working
477 but new programs cannot be linked with the routines in libc anymore.
478 Programs in need of RPC functionality must be linked against TI-RPC.
479 The TI-RPC implementation is IPv6 enabled and there are other benefits.
481 Visible changes of this change include (obviously) the inability to link
482 programs using RPC functions without referencing the TI-RPC library and the
483 removal of the RPC headers from the glibc headers.
484 Implemented by Ulrich Drepper.
486 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
487 syncfs, setns, sendmmsg
489 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
490 yue_HK, lij_IT, mhr_RU
492 * New encodings: CP770, CP771, CP772, CP773, CP774
494 * New program sotruss to trace calls through PLTs
495 Implemented by Ulrich Drepper.
497 * The malloc hook implementation is marked deprecated and will be removed
498 from the default implementation in the next version. The design never
499 worked ever since the introduction of threads. Even programs which do
500 not create threads themselves can use multiple threads created internally.
504 * The following bugs are resolved with this release:
506 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
507 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
508 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
509 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
512 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
514 * POWER7 optimizations: memset, memcmp, strncmp
516 * New optimized string functions for x86-64: strnlen (SSE2),
517 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
518 Implemented by Ulrich Drepper.
522 * The following bugs are resolved with this release:
524 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
525 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
526 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
527 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
528 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
529 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
530 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
531 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
533 * New interfaces: pthread_getname_np, pthread_setname_np
535 * New Linux interface: recvmmsg
537 * STT_GNU_IFUNC implemented for Sparc by David Miller.
539 * The dynamic linker now recognizes supported ABI versions from the
540 EI_ABIVERSION field in the ELF header.
541 Implemented by Ulrich Drepper.
543 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
544 will not be used to fill in password fields in the passwd.byname replies.
545 Instead it is used to synthesize the shadow.byname table, should it be
546 missing. This is a useful mode in some installations involving Solaris.
547 Implemented by Ulrich Drepper.
549 * New locales: kok_IN, sq_MK, cv_RU
553 * The following bugs are resolved with this release:
555 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
556 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
557 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
558 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
559 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
560 10789, 10817, 10823, 10840, 10847
562 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
564 Implemented by Ulrich Drepper.
566 * Checking version of longjmp added that fails if an uninitialized stack
567 frame would be created. Implemented by Ulrich Drepper.
569 * STT_GNU_IFUNC is now supported in static executables.
570 Implemented by H.J. Lu.
572 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
574 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
575 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
576 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
577 Contributed by H.J. Lu.
579 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
580 Implemented by Ulrich Drepper.
582 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
584 Contributed by H.J. Lu.
586 * Support for fma instruction in AVX on x86-64.
587 Implemented by H.J. Lu and Ulrich Drepper.
589 * AVX support in x86-64 auditing support in ld.so.
590 Implemented by H.J. Lu.
592 * STB_GNU_UNIQUE support added.
593 Implemented by Ulrich Drepper.
595 * Implement second fallback mode for optimized DNS lookup for even more
596 broken environments. If two requests from the same port are not
597 handled correctly close the socket and open a new one before sending
598 the second request. The 'single-request-reopen' option in /etc/resolv.conf
599 can be used to select this mode right away, instead of rediscovering the
600 necessity is every process again.
601 Implemented by Ulrich Drepper.
603 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
604 Implemented by Adam Tkac.
606 * Optimized iconv conversions for S390x.
607 Implemented by Andreas Krebbel.
609 * Using condvars with PI mutexes is now more efficient due to kernel
610 support for requeueing to PI futexes. NPTL support added for x86-64.
611 Implemented by Ulrich Drepper.
613 * New locales: ps_AF, my_MM
617 * The following bugs are resolved with this release:
619 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
620 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
621 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
622 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
623 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
625 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
626 Implemented by Ulrich Drepper.
628 * New Linux interfaces: accept4, fallocate, fallocate64.
629 Implemented by Ulrich Drepper.
631 * Correct declarations of string function when used in C++ code. This
632 could lead to compile errors for invalid C++ code.
634 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
637 * New POSIX 2008 interface: psiginfo
638 Implemented by Ulrich Drepper.
640 * New ISO C++1x interfaces: quick_exit, at_quick_exit
641 Implemented by Ulrich Drepper.
643 * Support for selecting between multiple function definitions at runtime
644 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
646 * The libcrypt library can now use the hash function implementations in
647 NSS. Implemented by Ulrich Drepper.
649 * The malloc implementation can be compiled to be less memory efficient
650 but higher performing in multi-threaded programs.
651 Implemented by Ulrich Drepper.
653 * New locales: nan_TW@latin, ks_IN
655 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
656 Implemented by Ulrich Drepper.
658 * Extended printf hook support. It is possible to use user-defined types
659 and extend existing format specifiers.
660 Implemented by Ulrich Drepper.
662 * Handling for group shadow files has been added.
663 Implemented by Ulrich Drepper.
665 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
666 servers (the case, e.g., for some people using the built-in DNS
667 server in ADSL modems/routers). There is a once-per-process timeout
668 in case of a broken server. To avoid it, users can run nscd or put
669 'options single-request' in /etc/resolv.conf.
670 Implemented by Ulrich Drepper.
674 * The following bugs are resolved with this release:
676 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
677 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
678 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
679 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
680 6968, 6974, 6980, 6995, 7008, 7009, 7029
682 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
683 up at the same time. Implemented by Ulrich Drepper.
685 * TLS descriptors for LD and GD on x86 and x86-64.
686 Implemented by Alexandre Oliva.
688 * getaddrinfo now handles DCCP and UDPlite.
689 Implemented by Ulrich Drepper.
691 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
692 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
693 Implemented by Ulrich Drepper.
695 * New implementation of memmem, strstr, and strcasestr which is O(n).
696 Implemented by Eric Blake.
698 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
700 * Implement "e" option for popen to open file descriptor with the
701 close-on-exec flag set. Implemented by Ulrich Drepper.
703 * Implement "b" mode for fmemopen. In this mode writes writes don't
704 implicitly add a NUL byte and seeks from the end of the buffer really
705 use the buffer end, not the string length as the basis.
706 Implemented by Ulrich Drepper.
708 * Many functions, exported and internal, now atomically set the close-on-exec
709 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
711 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
713 Implemented by Pravin Satpute.
715 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
719 * The following bugs are resolved with this release:
721 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
722 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
723 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
724 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
725 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
726 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
727 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
729 * New locales: bo_CN, bo_IN, shs_CA.
731 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
733 * Sorting rules for some Indian languages (Devanagari and Gujarati).
734 Implemented by Pravin Satpute.
736 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
738 * nscd caches now all timeouts for DNS entries
739 Implemented by Ulrich Drepper.
741 * nscd is more efficient and wakes up less often.
742 Implemented by Ulrich Drepper.
744 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
745 vdprintf, and obstack_vprintf.
746 Implemented by Jakub Jelinek.
748 * Faster memset for x86-64.
749 Implemented by Harsha Jagasia and H.J. Lu.
751 * Faster memcpy on x86.
752 Implemented by Ulrich Drepper.
754 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
755 Implemented by Ulrich Drepper.
757 * Faster sqrt and sqrtf implemention for some PPC variants.
758 Implemented by Steven Munroe.
762 * The following bugs are resolved with this release:
764 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
765 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
766 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
767 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
768 5071, 5103, 5104, 5112, 5113, 5184, 5186
770 * More checking functions: fread, fread_unlocked, open*, mq_open.
771 Implemented by Jakub Jelinek and Ulrich Drepper.
773 * Extend fortification to C++. Implemented by Jakub Jelinek.
775 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
776 by not recognizing 'a' as a modifier when those specs are requested.
777 Implemented by Jakub Jelinek.
779 * PPC optimizations to math and string functions.
780 Implemented by Steven Munroe.
782 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
783 options to be passed. Implemented by Ulrich Drepper.
785 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
787 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
788 Implemented by Ulrich Drepper.
790 * Handle private futexes in the NPTL implementation.
791 Implemented by Jakub Jelinek and Ulrich Drepper.
793 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
794 Implemented by Roland McGrath and Ulrich Drepper.
796 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
798 * SHA-256 and SHA-512 based password encryption.
799 Implemented by Ulrich Drepper.
801 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
802 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
805 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
806 Implemented by Ulrich Drepper.
810 * The following bugs are resolved with this release:
812 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
813 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
814 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
815 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
816 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
817 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
818 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
821 * New Linux interfaces: epoll_pwait, sched_getcpu.
823 * New generic interfaces: strerror_l.
825 * nscd can now cache the services database. Implemented by Ulrich Drepper.
829 * The following bugs are resolved with this release:
831 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
832 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
833 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
834 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
835 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
836 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
837 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
838 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
839 3225, 3251, 3252, 3253, 3273
841 * For Linux, the sorting of addresses returned by getaddrinfo now also
842 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
843 Implemented by Ulrich Drepper.
845 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
846 Implemented by Ulrich Drepper.
848 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
850 * New iconv module for MIK. Contributed by Alexander Shopov.
852 * For sites with broken group and/or passwd database, the auto-propagate
853 option of nscd can prevent creating ID lookup entries from the results
854 of a name lookup and vice versa. This usually is no problem but some
855 site might have problems with the default behavior.
856 Implemented by Ulrich Drepper.
858 * Iterating over entire database in NIS can be slow. With the
859 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
860 to trade time for memory. The entire database will be read at once.
861 Implemented by Ulrich Drepper.
863 * The interfaces introduced in RFC 3542 have been implemented by
866 * Support for the new ELF hash table format was added by Ulrich Drepper.
868 * Support for priority inheritance mutexes added by Jakub Jelinek and
871 * Support for priority protected mutexes added by Jakub Jelinek.
873 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
874 or_IN, csb_PL, fy_NL, sr_ME.
878 * More overflow detection functions.
880 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
881 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
883 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
884 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
885 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
886 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
887 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
888 by Masahide Washizawa.
890 * It is now possible to install audit libraries for the dynamic linker using
891 LD_AUDIT. Implemented by Ulrich Drepper.
893 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
894 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
895 For a libc and libpthread that works well on Linux 2.4 kernels, we
896 recommend using the stable 2.3 branch.
898 * The new function open_wmemstream acts like open_memstream,
899 but uses a wchar_t wide character buffer.
901 * The new function ppoll is an improved version of poll, similar to pselect.
903 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
904 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
905 renameat, unlinkat, linkat, symlinkat, readlinkat.
907 * New Linux kernel system calls: unshare,
908 inotify_init, inotify_add_watch, inotify_rm_watch.
910 * The euidaccess function is now also known by the alias eaccess,
911 for compatibility with some other systems.
913 * Timezone data updated to 2006b version.
917 * The following bugs are resolved with this release:
919 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
920 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
921 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
922 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
923 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
924 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
926 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
928 * As of this release, GCC 4 can be used to compile the C Library.
930 * Timezone data updated to 2005m version.
934 * The following bugs are resolved with this release:
936 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
937 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
938 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
939 777, 787, 821, 822, 823, 825
941 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
945 * Support for RFC 3678. Real implementations exist only for Linux so far.
946 Implemented by Ulrich Drepper.
948 * nscd can now cache entries persistently. Expiring entries are reloaded.
949 For speedups the cache can be shared in memory with client processes.
950 Implemented by Ulrich Drepper.
952 * nscd can now perform SELinux checks.
953 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
955 * getaddrinfo queries are now cached. Canonical name lookup is performed
957 Implemented by Ulrich Drepper.
959 * The nothrow function attribute is used when headers are used by gcc when
960 compiling C code. This can avoid significant amounts of exception
963 * The malloc functions perform more error checking and are stricter when
964 it comes to reacting on errors. The default action is to terminate
965 the process after showing an error message. Implemented by Ulrich Drepper.
967 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
968 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
970 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
971 namespaces using the new function dlmopen(). This feature is of course,
972 like most other dynamic loading functionality, not available in statically
973 linked applications. Implemented by Ulrich Drepper.
975 * Low-overhead boundary checking variants of string and some stdio functions
976 were added. These are to be used in conjunction with a gcc patch by
977 Jakub Jelinek which adds calls to these functions if possible.
978 Implemented by Jakub Jelinek and Ulrich Drepper.
980 * Old code for several operating systems and machine architectures that
981 have not been in working condition in a long time have been removed from
982 the main source tree maintained by the GNU C Library's maintainers.
983 These files are now reside in the separate `ports' source module
984 that is usable as an add-on when building the library.
988 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
989 interrogate the dynamic linker, compatible with the Solaris interface.
991 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
992 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
994 * getifaddrs now uses the netlink interface on Linux to get its information.
995 Implemented by Thorsten Kukuk.
997 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
998 Implemented by Ulrich Drepper.
1000 * support for non-executable stacks on x86 has been added. Changes mostly
1003 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1006 * getaddrinfo now performs destination address selection according to
1011 * Thread-safe interfaces for many functions that access locale data
1012 were added in version 2.3, but these features were omitted from NEWS.
1013 Many functions have variants with an `_l' suffix that take a `locale_t'
1014 object as a parameter rather than consulting the current locale.
1015 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1016 create and maintain `locale_t' objects. Additionally, the new function
1017 `uselocale' sets "the current locale" (as used by functions not so
1018 parameterized) set for an individual thread. These features were added
1019 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1021 * The functions getresuid, getresgid, setresuid, and setresgid, which
1022 have long been available on Linux, are now declared in <unistd.h>
1023 and are now also available on the Hurd.
1025 * ELF thread-local storage support (TLS) now works on x86-64.
1027 * The new dynamic string token $LIB is expanded in shared library names.
1028 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1030 * Aldy Hernandez contributed complete software floating point support for
1031 PowerPC machines with no FPU.
1033 * fexecve is implemented on Linux.
1035 * The `btowc' function should work at least twice as fast due to
1036 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1038 * With approriate thread add-ons cancelable functions are now implemented
1039 in libc.so as well. No need to call the function in libpthread. This
1040 change allowed to finally disable the incorrect and expensive handling
1041 of weak definition in ld.so.
1043 * Yet more PLT entries in libc.so have been removed. We finally arrived
1044 at the bare minimum. Startup times improved appropriately.
1046 * Support for the new Linux/x86 system call interface was added. The
1047 AT_SYSINFO auxiliary vector entry is recognized and handled.
1051 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1054 * iconv (the program and the interface) now accepts empty names (excluding
1055 options like //TRANSLIT) to mean "use charset of current locale".
1057 * localedef can now transliterate characters in strings which are not in
1058 the provided charmap. The information from the input locale is used.
1060 * Prelinking support was added for ELF targets. This requires additional
1061 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1063 * Read-only stdio streams now use mmap to speed up operation by eliminating
1064 copying and buffer underflows. To use add 'm' to the mode string of
1065 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1067 * The malloc functions were completely rewritten by Wolfram Gloger based
1068 on Doug Lea's malloc-2.7.0.c.
1070 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1071 implementation of regex.
1073 * Bruno Haible upgraded the iconv and locale implementation to support
1076 * Contents of the LC_* and LANG environment variables in the CEN style are
1077 not recognized anymore. It never was used. Change by Ulrich Drepper.
1079 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1080 thread-local storage (TLS) ABI on some platforms.
1081 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1083 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1084 EUC-JISX0213, and TSCII.
1086 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1087 BSD-compatible interface for getting all network interface addresses.
1088 Implementation for IPv4 by Roland McGrath.
1090 * Loading of locale data is faster due to the introduction of a locale
1091 archive. Implemented by Roland McGrath and Ulrich Drepper.
1093 * Startup times are significantly reduced by not using exported functions
1094 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1097 * Steven Munroe contributed a port to PowerPC64/Linux.
1101 * The Hurd now uses the GNU libio implementation of stdio rather than the
1102 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1104 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1105 with the same behavior as the Linux system call of the same name.
1109 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1110 128-bit long double format.
1112 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1113 IBM1161, and IBM1162 charsets.
1115 * Andreas Jaeger contributed a port to x86-64/Linux.
1117 * Peter Bruin contributed a port to PowerPC/Hurd.
1119 * libc functions using I/O streams now can handle wide-oriented streams
1122 * optimizations in the dynamic linker. Binaries created by recent binutils
1123 versions start up quicker due to reduced time spent on relocations.
1125 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1129 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1130 asinh, atanh, j0 for the 128-bit long double format.
1132 * Bruno Haible updated all the code handling Unicode in some form to
1133 support Unicode 3.1.
1135 * Speed of regex for single-byte locales is back to previous levels.
1136 Patch by Isamu Hasegawa.
1138 * Alpha, SPARC, and IA-64 now also using floating stacks.
1140 * Startup time of internationalized applications greatly improved through
1141 iconv cache. Use iconvconfig to generate the cache file.
1142 Contributed by Ulrich Drepper.
1144 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1145 severe performance problems. Patch by David Mosberger.
1147 * The Hurd port got a lot more functionality like AIO, various stdio
1148 extensions, etc. Mainly done by Roland McGrath.
1150 * mtrace can now lookup symbols in shared libraries.
1154 * Intel's IA-64 math library is largely integrated. It provides fast and
1155 accurate implementatations for most basic and standard math functions
1156 in float, double, and long double format.
1158 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1159 and asin for the 96-bit long double format and asin, log, tan for the
1160 128-bit long double format.
1162 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1163 The basic double functions exist today. Contributed by Abraham Ziv
1164 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1165 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1167 * An asynchronous name lookup library was added. The interface is designed
1168 after POSIX AIO. The proposal was circulated beforehand to get comments.
1169 No negative ones came in. Implemented by Ulrich Drepper.
1171 * Port to S390/64bit contributed by Martin Schwidefsky
1172 <schwidefsky@de.ibm.com>.
1174 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1175 of functions for Linux/IA-64.
1177 * The RPC code is now thread safe. Threads can now use the same service
1178 of different services at the same time. Patch by Eric Norum
1179 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1181 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1182 family of functions for Linux/S390.
1184 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1185 of functions for Linux/x86.
1187 * Port to Linux/CRIS contributed by Axis Communications.
1191 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1192 we can now check for namespace violations and missing declarations. The
1193 result is that almost all headers are now Unix-compliant (as defined in
1194 the upcoming XPG6). The negative side is that some programs might need
1195 corrections, too, if they depend on the incorrect form of the headers in
1196 previous versions which defined too many symbols and included too many
1199 * regex now handles multibyte character sets correctly.
1200 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1202 * iconv (the program) does now conform to the upcoming XPG6 and handles
1203 charmaps. Instead of the charset names the path of charmaps can be
1204 provided and the conversion happens based on this data.
1205 Contributed by Ulrich Drepper.
1207 * The locale program now provides detailed information about the installed
1212 only lists the names of the supported locales
1216 provides details such as country, language, and codeset name.
1217 Contributed by Ulrich Drepper.
1221 * The gencat program now parses the input file according to the charset
1222 selected by the LC_CTYPE category. This is important for stateful
1223 character sets. To make generating catalogs easier there is a way
1224 to overwrite the charset selected by the locale: before the first
1225 message or $ quote line the catalog can contain a line like
1227 $ codeset=ISO-8859-2
1229 to select the charset (ISO-8859-2 in this case).
1231 Implemented by Shinya Hanataka and Ulrich Drepper.
1233 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1234 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1235 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1237 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1238 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1240 * The LANGUAGE environment variable is now ignored unless the locale is
1241 changed from the default "C" locale.
1243 * The usual bug fixes.
1247 * Greg McGary added runtime support for bounds checking using gcc's
1248 new -fbounded-pointers option. ix86 target is complete. PowerPC
1251 * Thorsten Kukuk added secure mode support to nscd.
1253 * The Berkeley db libraries have been removed.
1255 Related, the nss_db module is now in a separate package since it
1256 obviously requires a database library being available.
1258 * Wide character I/O streams implemented by Ulrich Drepper.
1260 * Functions from the extended socket API added by Ulrich Drepper.
1262 * Functions feenableexcept and fedisableexcept to control the
1263 behaviour of individual exceptions have been added by Andreas Jaeger.
1265 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1267 * The resolver code has been updated from bind 8.2.3-T5B which supports
1268 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1271 This change could in some situations effect backward compatibility. Since
1272 now `_res' is a thread-local instead of a global variable, modifying it
1273 in one thread does not have any effect in other threads.
1275 The resolver library was also extended to allow IPv6 as the transport
1276 protocol for the requests. This work was done by Stig Venaas.
1278 * Compatibility code for K&R C compilers has been removed from the
1279 header files. A ISO C compiler is needed to use the library
1280 (conforming to either C89 or C99 standard).
1282 * Complete rewrite of the localedef program to support multibyte character
1283 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1284 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1285 Implemented by Ulrich Drepper.
1287 Bruno Haible significantly improved the generation and use of the data
1288 structures for the wide character tables.
1290 * Plural handling in gettext implemented by Ulrich Drepper.
1292 * The utmp daemon has been removed.
1294 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1296 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1299 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1301 * POSIX barriers implemented by Kaz Kylheku.
1303 * POSIX spawn function family implemented by Ulrich Drepper.
1305 * POSIX spinlocks are now available.
1307 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1309 * the configure option --enable-kernel=X.Y.Z allows to strip out
1310 compatibility for kernel versions before X.Y.Z. This is currently only
1311 implemented for Linux.
1313 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1314 field sin6_scope_id. This means that all programs using IPv6 should be
1315 recompiled. Don't expect binary compatibility with previous glibc
1318 * various conversion modules for IBM character sets contributed by
1321 * IA-64 port by Jes Sorensen and HJ Lu.
1335 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1337 * New xdr functions are added; some rpc functions are now 64bit clean.
1339 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1341 * Fixed known incompatibilities with glibc 2.0.
1343 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1345 * Optimized a number of functions (especially the ELF dynamic loader).
1347 * Update timezone data files.
1349 * lots of charmaps corrections
1351 * some new locale definitions and charmaps
1356 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1357 conform to POSIX member type requirements. Symbol versions have been
1358 adjusted as needed within the library, and for direct use by applications,
1359 but there is potential for problems if third-party libraries use
1360 struct timeval as part of their interface. This does not present
1361 a problem for X and other "essential" system libraries.
1363 * An additional locale model to support C++ Standard Library locale
1364 model and probably more was implemented by Ulrich Drepper.
1366 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1369 * Miles Bader provided the `argp' function family to support hierachical
1370 command line argument parsing, layered on top of getopt.
1372 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1374 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1377 * scanf recognizes the %a and %A format for scanning floating point numbers.
1379 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1380 information and interfaces for the available integer types.
1382 * about 130 new math functions were added to implement the ISO C9x math
1385 * the new header <complex.h> contains definitions of the complex math
1386 functions from ISO C 9X.
1388 * the new header <tgmath.h> defines generic macros to use complex or
1389 real valued functions.
1391 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1393 * Andreas Jaeger provided a test suite for the math library.
1395 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1397 * Ulrich Drepper added character set conversion functions (iconv).
1399 * Optimized string functions have been added.
1401 * The localedata addon is now part of glibc.
1403 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1405 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1406 daemon for NSS (nscd).
1408 Missing a better place here are some numbers on improvements. Under
1409 Linux 2.1.125 un-tar-ing the kernel sources takes
1413 using local files 12.19s 6.88s 22.91s
1415 using NIS 13.92s 8.91s 26.34s
1417 using NIS & nscd 10.37s 7.34s 25.30s
1419 using NIS+ 27.57s 30.37s 640.46s
1421 using NIS+ & nscd 10.25s 7.83s 26.51s
1423 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1425 Keep in mind that non-namelookup related operations dominate above times.
1426 It was just a common complain that using NIS+ unpacking the kernel is
1429 [1] The old nscd implementation is not available anymore since it was
1430 distributed with glibc up to version 2.0.98 and thus is now replaced.
1432 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1434 * Mark Kettenis provided a Hesiod NSS module.
1436 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1437 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1439 * rcmd can now handle netgroups (Dick Streefland).
1441 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1444 * Support for the IPv6 protocol has been added to the socket API, as per the
1445 latest draft standards.
1447 * Support for Linux 2.2 has been added.
1449 * Interface changes relative to the latest 2.0.x release:
1450 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1451 addseverity NEW: Unix98
1452 alphasort64 NEW: LFS
1453 argp_err_exit_status NEW: argp, GNU ext
1454 argp_error NEW: argp, GNU ext
1455 argp_failure NEW: argp, GNU ext
1456 argp_help NEW: argp, GNU ext
1457 argp_parse NEW: argp, GNU ext
1458 argp_program_bug_address NEW: argp, GNU ext
1459 argp_program_version NEW: argp, GNU ext
1460 argp_program_version_hook NEW: argp, GNU ext
1461 argp_state_help NEW: argp, GNU ext
1462 argp_usage NEW: argp, GNU ext
1463 authdes_create NEW: Secure RPC
1464 authdes_getucred NEW: Secure RPC
1465 authdes_pk_create NEW: Secure RPC
1466 backtrace NEW: GNU ext.
1467 backtrace_symbols NEW: GNU ext.
1468 backtrace_symbols_fd NEW: GNU ext.
1470 cacosf NEW: ISO C 9x
1471 cacosh NEW: ISO C 9x
1472 cacoshf NEW: ISO C 9x
1473 cacoshl NEW: ISO C 9x
1474 cacosl NEW: ISO C 9x
1481 casinf NEW: ISO C 9x
1482 casinh NEW: ISO C 9x
1483 casinhf NEW: ISO C 9x
1484 casinhl NEW: ISO C 9x
1485 casinl NEW: ISO C 9x
1487 catanf NEW: ISO C 9x
1488 catanh NEW: ISO C 9x
1489 catanhf NEW: ISO C 9x
1490 catanhl NEW: ISO C 9x
1491 catanl NEW: ISO C 9x
1492 cbc_crypt NEW: Secure RPC
1496 ccoshf NEW: ISO C 9x
1497 ccoshl NEW: ISO C 9x
1503 cimagf NEW: ISO C 9x
1504 cimagl NEW: ISO C 9x
1505 clearerr_locked REMOVED
1506 clntunix_create NEW: sunrpc ext
1508 clog10 NEW: ISO C 9x
1509 clog10f NEW: ISO C 9x
1510 clog10l NEW: ISO C 9x
1520 cprojf NEW: ISO C 9x
1521 cprojl NEW: ISO C 9x
1523 crealf NEW: ISO C 9x
1524 creall NEW: ISO C 9x
1529 csinhf NEW: ISO C 9x
1530 csinhl NEW: ISO C 9x
1533 csqrtf NEW: ISO C 9x
1534 csqrtl NEW: ISO C 9x
1538 ctanhf NEW: ISO C 9x
1539 ctanhl NEW: ISO C 9x
1541 des_setparity NEW: Secure RPC
1542 ecb_crypt NEW: Secure RPC
1543 endutxent NEW: Unix98
1545 exp10f NEW: ISO C 9x
1546 exp10l NEW: ISO C 9x
1550 fattach NEW: STREAMS
1551 fdetach NEW: STREAMS
1555 feclearexcept NEW: ISO C 9x
1556 fegetenv NEW: ISO C 9x
1557 fegetexceptflag NEW: ISO C 9x
1558 fegetround NEW: ISO C 9x
1559 feholdexcept NEW: ISO C 9x
1561 feraiseexcept NEW: ISO C 9x
1562 ferror_locked REMOVED
1563 fesetenv NEW: ISO C 9x
1564 fesetexceptflag NEW: ISO C 9x
1565 fesetround NEW: ISO C 9x
1566 fetestexcept NEW: ISO C 9x
1567 feupdateenv NEW: ISO C 9x
1568 fflush_locked REMOVED
1572 fgets_unlocked NEW: GNU ext.
1573 fileno_locked REMOVED
1585 fputc_locked REMOVED
1586 fputs_unlocked NEW: GNU ext.
1587 fread_unlocked NEW: GNU ext.
1592 fstatvfs NEW: Unix98
1596 ftruncate64 NEW: LFS
1598 fwrite_unlocked NEW: GNU ext.
1599 gai_strerror NEW: IPv6
1603 getchar_locked REMOVED
1605 getdate_err NEW: Unix98
1606 getdate_r NEW: GNU ext.
1608 getnameinfo NEW: IPv6
1609 getnetname NEW: Secure RPC
1610 getpmsg NEW: STREAMS
1611 getpt NEW: Unix98 PTY
1612 getrlimit64 NEW: LFS
1613 getutxent NEW: Unix98
1614 getutxid NEW: Unix98
1615 getutxline NEW: Unix98
1616 glob64 NEW: GNU ext.
1617 globfree64 NEW: GNU ext.
1618 gnu_get_libc_release NEW: GNU ext.
1619 gnu_get_libc_version NEW: GNU ext.
1620 grantpt NEW: Unix98 PTY
1621 host2netname NEW: Secure RPC
1623 iconv_close NEW: iconv
1624 iconv_open NEW: iconv
1625 if_freenameindex NEW: IPv6
1626 if_indextoname NEW: IPv6
1627 if_nameindex NEW: IPv6
1628 if_nametoindex NEW: IPv6
1629 in6addr_any NEW: IPv6
1630 in6addr_loopback NEW: IPv6
1631 inet6_isipv4mapped NEW: IPv6
1632 isastream NEW: STREAMS
1633 iswblank NEW: GNU ext.
1634 key_decryptsession NEW: Secure RPC
1635 key_decryptsession_pk NEW: Secure RPC
1636 key_encryptsession NEW: Secure RPC
1637 key_encryptsession_pk NEW: Secure RPC
1638 key_gendes NEW: Secure RPC
1639 key_get_conv NEW: Secure RPC
1640 key_secretkey_is_set NEW: Secure RPC
1641 key_setnet NEW: Secure RPC
1642 key_setsecret NEW: Secure RPC
1643 llrint NEW: ISO C 9x
1644 llrintf NEW: ISO C 9x
1645 llrintl NEW: ISO C 9x
1646 llround NEW: ISO C 9x
1647 llroundf NEW: ISO C 9x
1648 llroundl NEW: ISO C 9x
1653 lrintf NEW: ISO C 9x
1654 lrintl NEW: ISO C 9x
1655 lround NEW: ISO C 9x
1656 lroundf NEW: ISO C 9x
1657 lroundl NEW: ISO C 9x
1659 makecontext NEW: Unix98
1660 mempcpy NEW: GNU ext.
1663 modify_ldt NEW: kernel
1667 nearbyint NEW: ISO C 9x
1668 nearbyintf NEW: ISO C 9x
1669 nearbyintl NEW: ISO C 9x
1670 netname2host NEW: Secure RPC
1671 netname2user NEW: Secure RPC
1672 nexttoward NEW: ISO C 9x
1673 nexttowardf NEW: ISO C 9x
1674 nexttowardl NEW: ISO C 9x
1678 passwd2des NEW: Secure RPC
1680 pow10f NEW: GNU ext.
1681 pow10l NEW: GNU ext.
1684 printf_size NEW: GNU ext.
1685 printf_size_info NEW: GNU ext.
1686 profil_counter REMOVED
1687 pthread_mutexattr_getkind_np REPLACED
1688 pthread_mutexattr_setkind_np REPLACED
1689 ptsname NEW: Unix98 PTY
1690 ptsname_r NEW: Unix98 PTY
1692 putchar_locked REMOVED
1693 putgrent NEW: GNU ext.
1695 putpmsg NEW: STREAMS
1696 pututxline NEW: Unix98
1700 readdir64_r NEW: LFS
1701 remquo NEW: ISO C 9x
1702 remquof NEW: ISO C 9x
1703 remquol NEW: ISO C 9x
1705 roundf NEW: ISO C 9x
1706 roundl NEW: ISO C 9x
1708 scalbln NEW: ISO C 9x
1709 scalblnf NEW: ISO C 9x
1710 scalblnl NEW: ISO C 9x
1712 sendfile NEW: kernel
1713 setcontext NEW: Unix98
1714 setrlimit64 NEW: LFS
1715 setutxent NEW: Unix98
1717 sigignore NEW: Unix98
1718 sigqueue NEW: POSIX.1b
1719 sigrelse NEW: Unix98
1720 sigset NEW: POSIX.1b
1721 sigtimedwait NEW: POSIX.1b
1722 sigwaitinfo NEW: POSIX.1b
1723 sincos NEW: GNU ext.
1724 sincosf NEW: GNU ext.
1725 sincosl NEW: GNU ext.
1729 strcasestr NEW: GNU ext.
1730 strtoimax NEW: ISO C 9x
1731 strtoumax NEW: ISO C 9x
1732 strverscmp NEW: GNU ext.
1733 svcauthdes_stats NEW: Secure RPC
1734 svcunix_create NEW: sunrpc etx
1735 svcunixfd_create NEW: sunrpc ext
1736 swapcontext NEW: Unix98
1737 tcgetsid NEW: Unix98 PTY
1738 tdestroy NEW: GNU ext.
1739 tgamma NEW: ISO C 9x
1740 tgammaf NEW: ISO C 9x
1741 tgammal NEW: ISO C 9x
1745 truncf NEW: ISO C 9x
1746 truncl NEW: ISO C 9x
1748 unlockpt NEW: Unix98 PTY
1749 updwtmpx NEW: Unix98
1750 user2netname NEW: Secure RPC
1751 utmpxname NEW: Unix98
1752 versionsort NEW: GNU ext.
1753 versionsort64 NEW: GNU ext.
1755 wcscasecmp NEW: GNU ext.
1756 wcsncasecmp NEW: GNU ext.
1757 wcsnlen NEW: GNU ext.
1758 wcstoimax NEW: ISO C 9x
1759 wcstoll NEW: ISO C 9x
1760 wcstoull NEW: ISO C 9x
1761 wcstoumax NEW: ISO C 9x
1763 wordexp NEW: POSIX.2
1764 wordfree NEW: POSIX.2
1765 write_profiling REMOVED
1766 xdecrypt NEW: Secure RPC
1767 xdr_authdes_cred NEW: Secure RPC
1768 xdr_authdes_verf NEW: Secure RPC
1769 xdr_cryptkeyarg NEW: Secure RPC
1770 xdr_cryptkeyarg2 NEW: Secure RPC
1771 xdr_cryptkeyres NEW: Secure RPC
1772 xdr_getcredres NEW: Secure RPC
1773 xdr_key_netstarg NEW: Secure RPC
1774 xdr_key_netstres NEW: Secure RPC
1775 xdr_keybuf NEW: Secure RPC
1776 xdr_keystatus NEW: Secure RPC
1777 xdr_netnamestr NEW: Secure RPC
1778 xdr_sizeof NEW: Secure RPC
1779 xdr_unixcred NEW: sunrpc ext
1780 xencrypt NEW: Secure RPC
1781 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1792 * inet_ntoa is thread-safe
1794 * updwtmp is moved from libutil to libc
1796 * rewrite of cbrt function
1798 * update of timezone data
1812 * add atoll function
1814 * fix complex problems in Berkeley DB code
1816 * fix math functions
1820 * fixed lots of header problems (especially Linux/GNU specific)
1822 * dynamic loader preserves all registers
1824 * Roland McGrath provided support for handling of auxiliary objects in
1825 the ELF dynamic loader.
1827 * support for parallel builds is improved
1831 * GNU extensions are no longer declared by default. To enable them you
1832 must define the macro `_GNU_SOURCE' in your program or compile with
1835 * The library has changed from using GNU ld symbol aliases to using weak
1836 symbols where available. The ELF object file format supports weak
1837 symbols; GNU ld also supports weak symbols in the a.out format. (There
1838 is also now support for other GNU ld extensions in ELF. Use the
1839 `--with-elf' option to configure to indicate you have ELF, and
1840 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1841 of many files which contained only symbol aliases, reducing the size of
1842 the source and the compiled library; many other files were renamed to
1843 less cryptic names previously occupied by the symbol alias files.
1844 There is a new header file <elf.h> for programs which operate on
1845 files in the ELF format.
1847 * Converted to Autoconf version 2, so `configure' has more options.
1848 Run `configure --help' to see the details.
1850 * The library can now be configured to build profiling, highly-optimized
1851 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1852 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1853 `configure' enable building these extra libraries. The shared library is
1854 built by default when using both ELF and GNU ld. When shared libraries
1855 are enabled, the new library `-ldl' is available for arbitrary run-time
1856 loading of shared objects; its interface is defined in <dlfcn.h>. The
1857 new header file <link.h> gives access to the internals of the run-time
1858 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1859 application of same name on other systems and it provides information
1860 about dynamically linked binaries.
1862 * The C library now provides the run-time support code for profiling
1863 executables compiled with `-pg'. Programs can control the profiling code
1864 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1865 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1866 the support for this file format was contributed by David Mosberger-Tang.
1868 * The math code has been replaced with a math library based on fdlibm from
1869 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1870 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1871 functions. The math functions now reside in a separate library, so
1872 programs using them will need to use `-lm' their linking commands.
1874 * John C. Bowman contributed optimized ix87 assembler inline functions.
1876 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1877 mechanism similar to that found in Solaris 2. This is now used for the
1878 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1879 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1880 file controls what services are used for each individual database. This
1881 works by loading shared libraries with names specified in `nsswitch.conf',
1882 so service modules can be changed or added at any time without even
1883 relinking any program. Currently there are the file, db, and NIS based
1884 NSS services available.
1886 * The new functions `strtoq' and `strtouq' parse integer values from
1887 strings, like `strtol' and `strtoul', but they return `long long int' and
1888 `unsigned long long int' values, respectively (64-bit quantities).
1890 * The new functions `strtof' and `strtold' parse floating-point values from
1891 strings, like `strtod', but they return `float' and `long double' values,
1892 respectively (on some machines `double' and `long double' are the same).
1894 * Ulrich Drepper has contributed new implementations of the floating-point
1895 printing and reading code used in the `printf' family of functions and
1896 `strtod', `strtof', and `strtold'. These new functions are perfectly
1897 accurate, and much faster than the old ones.
1899 * The implementation of the POSIX locale model was completely rewritten by
1900 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1901 to compile the POSIX locale definition.
1903 * The former dummy implementations of the strcoll and strxfrm function are
1904 now replaced by fully functional code contributed by Ulrich Drepper. The
1905 collation information comes from the POSIX locale definitions.
1907 * The new header <langinfo.h> defines an interface for accessing
1908 various locale-dependent data (using the locale chosen with `setlocale').
1910 * Ulrich Drepper has contributed a new suite of functions for operation on
1911 wide-character and multibyte-character strings, in <wchar.h>;
1912 and classification and case conversion of wide characters, in <wctype.h>.
1913 These new functions are conforming to the ISO C, Amendement 1 specification.
1915 * There is now a second implementation of the standard I/O library available.
1916 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1917 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1919 * You can now use positional parameter specifications in format strings
1920 for the `printf' and `scanf' families of functions. For example,
1921 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1922 ``Number 6, Mr Jones''. This is mainly useful when providing different
1923 format strings for different languages, whose grammars may dictate
1924 different orderings of the values being printed. To support this
1925 feature, the interface for `register_printf_handler' has changed; see
1926 the header file <printf.h> for details.
1928 * The `printf' and `scanf' families of functions now understand a new
1929 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1930 to group numbers as indicated by the locale; for `scanf' and friends, this
1931 says to accept as valid only a number with all the proper grouping
1932 separators in the right places. In the default "C" locale, numbers are
1933 not grouped; but locales for specific countries will define the usual
1934 conventions (i.e. separate thousands with `,' in the US locale).
1936 * The pgrp functions have been regularized, slightly incompatibly but much
1937 less confusingly. The core functions are now `getpgid' and `setpgid',
1938 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1939 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1940 provided for compatibility. There is no longer an incompatible `getpgrp'
1941 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1943 * The new header file <fts.h> and suite of functions simplify programs that
1944 operate on directory trees. This code comes from 4.4 BSD.
1946 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1947 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1948 NSS scheme used in glibc.
1950 * There is a new malloc debugging hook `__memalign_hook'.
1952 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1953 `unsigned int' in <sys/types.h>. These are for compatibility only and
1954 their use is discouraged.
1956 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1957 done differently, so that it works even without GNU ld.
1959 * New function `euidaccess' checks allowed access to a file like `access',
1960 but using the effective IDs instead of the real IDs.
1962 * The time zone data files have been updated for the latest and greatest
1963 local time conventions of the countries of the world.
1965 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1968 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1969 for formatting floating-point numbers. They are provided only for
1970 compatibility; new programs should use `sprintf' instead. There are
1971 also equivalent function for the `long double' floating-point type and
1972 all functions also exist in a reentrant form.
1974 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1975 functions for maintaining the login-record files (primarily of use to
1976 system programs such as `login'), and convenient functions for
1977 allocating and initializing a pseudo-terminal (pty) device.
1979 * Ulrich Drepper has contributed new support for System V style
1980 shared memory and IPC on systems that support it.
1982 * Ulrich Drepper has contributed several miscellaneous new functions found
1983 in System V: The `hsearch' family of functions provide an effective
1984 implementation of hash tables; `a64l' and `l64a' provide a very simple
1985 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1988 * Ulrich Drepper has contributed new reentrant counterparts for the
1989 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1991 * Ulrich Drepper has contributed new, highly-optimized versions of several
1992 string functions for the i486/Pentium family of processors.
1994 * Ulrich Drepper has updated the Linux-specific code, based largely
1995 on work done in Hongjiu Lu's version of GNU libc for Linux.
1996 The GNU library now supports Linux versions 2.0.10 and later,
1997 using the ELF object file format (i[3456]86-*-linux).
1999 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2001 * David Mosberger-Tang and Richard Henderson have ported the C library
2002 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2003 dynamic linking support for ELF/Alpha.
2005 * Richard Henderson contributed several Alpha optimized assembler function
2006 for arithmetic and string handling.
2008 * Ulrich Drepper has contributed a new set of message catalog functions to
2009 support multiple languages using the <libintl.h> interface, for use with
2010 his new package GNU gettext. Translation volunteers have contributed
2011 catalogs of the library's messages in Spanish, German, and Korean.
2013 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2014 program and the `catgets' function for reading the catalog files it
2015 creates. (The <libintl.h> interface is preferred; we include the
2016 <nl_types.h> interface using `catgets' only for source compatibility with
2017 programs already written to use it.)
2019 * New header file <values.h> gives SVID-compatible names for <limits.h>
2022 * Various new macros, declarations, and small header files for compatibility
2025 * New function `group_member' is a convenient way to check if a process has
2026 a given effective group ID.
2028 * When using GCC 2.7 and later, the socket functions are now declared in a
2029 special way so that passing an argument of type `struct sockaddr_in *',
2030 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2031 `struct sockaddr *' type, does not generate a type-clash warning.
2033 * New function `error' declared in header file <error.h> is a convenient
2034 function for printing error messages and optionally exiting; this is the
2035 canonical function used in GNU programs. The new functions `err', `warn',
2036 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2037 doing the same thing.
2039 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2040 POSIX.2 `glob' function to do ~ and {...} expansion.
2042 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2043 `clearenv' which is used in POSIX.9 is also available.
2045 * New function `getsid' returns session ID number on systems that support it.
2047 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2048 files <db.h> and <mpool.h> provide a rich set of functions for several
2049 types of simple databases stored in memory and in files, and <ndbm.h> is
2050 an old `ndbm'-compatible interface using the `db' functions. Link with
2051 `-ldb' to get these functions.
2053 * New macro `strdupa' copies a string like `strdup', but uses local stack
2054 space from `alloca' instead of dynamic heap space from `malloc'.
2056 * New function `strnlen' is like `strlen' but searches only a given maximum
2057 number of characters for the null terminator. `stpncpy', `strndup' and
2058 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2061 * New function `statfs' in header <sys/statfs.h>.
2063 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2064 provide convenient functions for operating on blocks of null-terminated
2067 * A new suite of functions in <utmp.h> handle all the details of reading
2068 and writing the utmp file.
2070 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2073 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2074 completely POSIX compliant and also implemented the extended functionality
2075 to handle alternate digit representation and alternate era date formats.
2077 * Ulrich Drepper provided an implementation of the `strptime' function
2078 defined in XPG4.2 which transforms a string into a `struct tm' value.
2080 * Paul Eggert provided the tzselect shell script as part of the timezone
2081 code. The shell script makes it easy to select the correct timezone
2084 * The implementation of the malloc family of functions is completely replaced
2085 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2086 The implementation uses the mmap function (if available) and it is
2087 optimized for the use in multi threaded programs.
2089 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2090 functions. This new functionality is usable by specifying a special
2091 salt string and it is compatible with implementation on *BSD systems.
2093 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2094 `getsubopt' to handle second level command line options, `bsd_signal'
2095 to access BSD style `signal' functionality, the obsolete `regexp' style
2098 * the `lchown' function is available on system which support this
2101 * The implementation of the shadow password handling function was contributed
2104 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2106 * POSIX.1g support was added. The <sys/select.h> header is available,
2107 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2108 implementation of `getaddrinfo'.
2112 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2114 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2115 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2117 * The new function `daemon' from 4.4 BSD is useful for server programs that
2118 want to put themselves in the background.
2120 * Joel Sherrill has contributed support for several standalone boards that
2121 run without an operating system.
2123 * `printf', `scanf' and friends now accept a `q' type modifier for long
2124 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2126 * All of the code taken from BSD (notably most of the math and networking
2127 routines) has been updated from the BSD 4.4-Lite release.
2129 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2131 * The new functions `getdomainname' and `setdomainname' fetch or change the
2132 YP/NIS domain name. These are system calls which exist on systems which
2135 * The time zone data files have been updated for the latest international
2138 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2139 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2143 * The C library now includes support for Sun RPC, from Sun's free
2144 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2145 are included. (There is still no support for YP.)
2147 * Tom Quinn has contributed a port of the C library to SGI machines running
2148 Irix 4 (mips-sgi-irix4).
2150 * The new `lockf' function is a simplified interface to the locking
2151 facilities of `fcntl', included for compatibility.
2153 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2155 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2157 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2160 * The error message printed by `assert' for a failed assertion now includes
2161 the name of the program (if using GNU ld) and the name of the calling
2162 function (with versions of GCC that support this).
2164 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2166 * The library now includes the <sys/mman.h> header file and memory
2167 management functions `mmap', `munmap', `mprotect', `msync', and
2168 `madvise', on systems that support those facilities.
2170 * The interface for `mcheck' has changed slightly: the function called to
2171 abort the program when an allocation inconsistency is detected now takes
2172 an argument that indicates the type of failure. The new function
2173 `mprobe' lets you request a consistency check for a particular block at
2174 any time (checks are normally done only when you call `free' or `realloc'
2177 * It is now possible to easily cross-compile the C library, building on one
2178 system a library to run on another machine and/or operating system. All
2179 you need to do is set the variable `HOST_CC' in `configparms' to the
2180 native compiler for programs to run on the machine you are building on (a
2181 few generator programs are used on Unix systems); set `CC' to the
2184 * The new function `fexecve' (only implemented on the GNU system) executes
2185 a program file given a file descriptor already open on the file.
2189 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2190 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2192 * You can set the variable `libprefix' in `configparms' to specify a prefix
2193 to be prepended to installed library files; this makes it easy to install
2194 the GNU C library to be linked as `-lgnuc' or whatever.
2196 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2197 copies a limited number of characters from a string, and returns the
2198 address of the last character written.
2200 * You no longer need to check for whether the installed `stddef.h' is
2201 compatible with the GNU C library. configure now checks for you.
2203 * You can now define a per-stream `fileno' function to convert the
2204 stream's cookie into an integral file descriptor.
2206 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2207 allocates zero bytes of storage, and returns a unique pointer which
2208 you can pass to `realloc' or `free'. The behavior is undefined if
2209 you dereference this pointer.
2211 * The C library now runs on Sony NEWS m68k machines running either
2212 NewsOS 3 or NewsOS 4.
2214 * The new `syscall' function is a system-dependent primitive function
2215 for invoking system calls. It has the canonical behavior on Unix
2216 systems, including unreliable return values for some calls (such as
2217 `pipe', `fork' and `getppid').
2219 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2220 to `EAGAIN', which is the preferred name. On systems whose kernels
2221 use two distinct codes, the C library now translates EWOULDBLOCK to
2222 EAGAIN in every system call function.
2226 * The GNU C Library Reference Manual is now distributed with the library.
2227 `make dvi' will produce a DVI file of the printed manual.
2228 `make info' will produce Info files that you can read on line using C-h i
2229 in Emacs or the `info' program.
2230 Please send comments on the manual to bug-glibc-manual@gnu.org.
2232 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2234 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2236 * Jason Merrill has contributed a port to the Sequent Symmetry running
2237 Dynix version 3 (i386-sequent-dynix).
2239 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2240 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2242 * New function `memory_warnings' lets you arrange to get warnings when
2243 malloc is running out of memory to allocate, like Emacs gives you.
2245 * The C library now contains the relocating allocator used in Emacs 19 for
2246 its editing buffers. This allocator (ralloc) minimizes allocation
2247 overhead and fragmentation by moving allocated regions around whenever it
2248 needs to. You always refer to a ralloc'd region with a "handle" (a
2249 pointer to a pointer--an object of type `void **').
2251 * There is a new `printf' format: `%m' gives you the string corresponding
2252 to the error code in `errno'.
2254 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2255 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2256 pass, the `a' modifier says to fill in a `char **' you pass with a
2259 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2260 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2261 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2263 * `mkstemp' is a traditional Unix function to atomically create and open a
2264 uniquely-named temporary file.
2268 * The standard location for the file that says what the local timezone is
2269 has changed again. It is now `/usr/local/etc/localtime' (or more
2270 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2272 * The distribution no longer contains any files with names longer than 14
2275 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2276 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2278 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2282 * The configuration process has changed quite a bit. The `configure'
2283 script is now used just like the configuration scripts for other GNU
2284 packages. The `sysdeps' directory hierarchy is much rearranged.
2285 The file `INSTALL' explains the new scheme in detail.
2287 * The header files no longer need to be processed into ANSI C and
2288 traditional C versions. There is just one set of files to install, and
2289 it will work with ANSI or old C compilers (including `gcc -traditional').
2291 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2292 MIPS DECStation running Ultrix 4.
2294 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2295 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2296 made itself into a shared library.
2298 * Yet further improved support for the i386, running 4.3 BSD-like systems
2299 (such as Mach 3 with the Unix single-server), or System V.
2301 * New function `strncasecmp' to do case-insensitive string comparison
2302 with limited length.
2304 * New function `strsep' is a reentrant alternative to `strtok'.
2306 * New functions `scandir' and `alphasort' for searching directories.
2308 * New function `setenv' is a better interface to `putenv'.
2310 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2311 function for traversing a directory tree.
2313 * The GNU obstack package is now also part of the C library.
2314 The new function `open_obstack_stream' creates a stdio stream that
2315 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2316 formatted output directly to an obstack.
2318 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2319 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2321 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2323 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2324 things to your strings.
2326 * There are some new test programs: test-fseek, testmb, and testrand.
2328 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2329 These ports are not finished, but are a good starting place for really
2330 supporting those systems.
2332 * `/etc/localtime' is now the standard location for the file that says what
2333 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2334 This follows the general principle that `/etc' is the place for all local
2335 configuration files.
2337 * The C library header files now use `extern "C"' when used by the C++
2338 compiler, so the C library should now work with C++ code.
2340 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2341 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2344 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2345 function which uses the `merge sort' algorithm, and is said to be
2346 significantly faster than the old GNU `qsort' function. Merge sort is
2347 now the standard `qsort' function. The new algorithm can require a lot
2348 of temporary storage; so, the old sorting function is called when the
2349 required storage is not available.
2351 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2352 provides the Unix `crypt' function, plus some other entry points.
2354 * The code and header files taken from 4.4 BSD have been updated with the
2355 latest files released from Berkeley.
2357 ----------------------------------------------------------------------
2358 Copyright information:
2360 Copyright (C) 1992-2013 Free Software Foundation, Inc.
2362 Permission is granted to anyone to make or distribute verbatim copies
2363 of this document as received, in any medium, provided that the
2364 copyright notice and this permission notice are preserved,
2365 thus giving the recipient permission to redistribute in turn.
2367 Permission is granted to distribute modified versions
2368 of this document, or of portions of it,
2369 under the above conditions, provided also that they
2370 carry prominent notices stating who last changed them.
2373 version-control: never
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