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, 926, 2801, 4772, 6786, 6787, 6807, 6810, 7003, 9954,
13 10253, 10278, 11087, 11157, 11214, 12486, 13028, 13982, 13985, 14029,
14 14032, 14143, 14155, 14547, 14699, 14752, 14876, 14910, 15004, 15048,
15 15089, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
16 15483, 15522, 15531, 15532, 15601, 15608, 15609, 15610, 15632, 15640,
17 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748, 15749,
18 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15844, 15847, 15849,
19 15855, 15856, 15857, 15859, 15867, 15886, 15887, 15890, 15892, 15893,
20 15895, 15897, 15901, 15905, 15909, 15915, 15917, 15919, 15921, 15923,
21 15939, 15941, 15948, 15963, 15966, 15985, 15988, 15997, 16032, 16034,
22 16036, 16037, 16038, 16041, 16055, 16071, 16072, 16074, 16077, 16078,
23 16103, 16112, 16143, 16144, 16146, 16150, 16151, 16153, 16167, 16172,
24 16195, 16214, 16245, 16271, 16274, 16283, 16289.
26 * The public headers no longer use __unused nor __block. This change is to
27 support compiling programs that are derived from BSD sources and use
28 __unused internally, and to support compiling with Clang's -fblock
29 extension which uses __block.
31 * CVE-2012-4412 The strcoll implementation caches indices and rules for
32 large collation sequences to optimize multiple passes. This cache
33 computation may overflow for large collation sequences and may cause a
34 stack or buffer overflow. This is now fixed to use a slower algorithm
35 which does not use a cache if there is an integer overflow.
37 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
38 rules for large collation sequences to optimize multiple passes and falls
39 back to alloca if malloc fails, resulting in a possible stack overflow.
40 The implementation now falls back to an uncached collation sequence lookup
43 * CVE-2013-4788 The pointer guard used for pointer mangling was not
44 initialized for static applications resulting in the security feature
45 being disabled. The pointer guard is now correctly initialized to a
46 random value for static applications. Existing static applications need
47 to be recompiled to take advantage of the fix (bug 15754).
49 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
50 to the d_name member of struct dirent, or omit the terminating NUL
51 character. (Bugzilla #14699).
53 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
54 aligned_alloc functions could allocate too few bytes or corrupt the
55 heap when passed very large allocation size values (Bugzilla #15855,
58 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
59 for AF_INET6 has been fixed (Bugzilla #16072).
61 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
62 pap_CW, quz_PE, the_NP.
64 * Substantially revised locales: gd_GB, ht_HT
66 * The LC_ADDRESS field was updated to support country_car for almost all
69 * ISO 1427 definitions were updated.
71 * ISO 3166 definitions were updated.
73 * The localedef utility now supports --big-endian and --little-endian
74 command-line options to generate locales for a different system from that
75 for which the C library was built.
77 * Binary locale files now only depend on the endianness of the system for
78 which they are generated and not on other properties of that system. As a
79 consequence, binary files generated with new localedef may be incompatible
80 with old versions of the GNU C Library, and binary files generated with
81 old localedef may be incompatible with this version of the GNU C Library,
82 in the following circumstances:
84 + Locale files may be incompatible on m68k systems.
86 + Locale archive files (but not separate files for individual locales) may
87 be incompatible on systems where plain "char" is signed.
89 * The configure option --disable-versioning has been removed. Builds with
90 --disable-versioning had not worked for several years.
92 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
93 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
95 * SystemTap probes for malloc have been introduced.
97 * Support for powerpc64le has been added.
99 * The soft-float powerpc port now supports e500 processors.
101 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+.
105 * The following bugs are resolved with this release:
107 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
108 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
109 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
110 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
111 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
112 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
113 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
114 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
115 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
116 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
117 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
118 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
119 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
122 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
123 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
124 Distributions can re-enable building and using pt_chown via the new configure
125 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
126 considerable security risks and should only be used if the distribution
127 understands and accepts the risks.
129 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
132 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
133 fixed (Bugzilla #15330).
135 * Add support for calling C++11 thread_local object destructors on thread
136 and program exit. This needs compiler support for offloading C++11
137 destructor calls to glibc.
139 * Improved worst case performance of libm functions with double inputs and
142 * Support for priority inherited mutexes in pthread condition variables on
143 non-x86 architectures.
145 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
147 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
149 * Optimized string functions for ARM. Implemented by Will Newton and
152 * Optimized libm functions for SPARC. Implemented by David S. Miller.
154 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
157 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
158 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
160 * Added a benchmark framework to track performance of functions in glibc.
162 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
163 It is based on draft TS 18661 and currently enabled as a GNU extension.
165 * On Linux, the clock function now uses the clock_gettime system call
166 for improved precision, rather than old times system call.
168 * Added new API functions pthread_getattr_default_np and
169 pthread_setattr_default_np to get and set the default pthread
170 attributes of a process.
172 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
173 This may improve lock scaling of existing programs on TSX capable systems.
174 When the --enable-lock-elision=yes parameter is specified at configure
175 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
178 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
179 availability). Implemented by Ryan S. Arnold.
181 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
185 * The following bugs are resolved with this release:
187 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
188 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
189 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
190 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
191 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
192 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
193 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
194 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
195 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
196 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
197 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
198 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
199 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
200 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
201 14879, 14889, 14893, 14898, 14914.
203 * Optimization of memcpy for MIPS.
205 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
206 EMFILE has been fixed (Bugzilla #14889).
208 * The add-on ports collection is now distributed in the "ports" subdirectory
209 of the main GNU C Library distribution, rather than separately.
211 * Port to ARM AArch64 contributed by Linaro.
213 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
214 Optimized versions of memcpy, memset, and memcmp added for System z10 and
216 Implemented by Andreas Krebbel.
218 * The new function secure_getenv allows secure access to the environment,
219 returning NULL if running in a SUID/SGID process. This function replaces
220 the internal function __secure_getenv.
222 * SystemTap static probes have been added into the dynamic linker.
223 Implemented by Gary Benson.
225 * Optimizations of string functions strstr, strcasestr and memmem.
226 Implemented by Maxim Kuvyrkov.
228 * The minimum Linux kernel version that this version of the GNU C Library
229 can be used with is 2.6.16.
231 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
232 powerpc POWER7. Implemented by Will Schmidt.
234 * New configure option --disable-nscd builds the C library such that it
235 never attempts to contact the Name Service Caching Daemon (nscd).
236 New configure option --disable-build-nscd avoids building nscd itself;
237 this is the default if --disable-nscd is used.
239 * Improved support for cross-compilation, including cross-testing and
240 bootstrap builds without a previously built glibc.
242 * Several testsuite tests are now able to test multiple IFUNC variants of an
243 interface, rather than just testing the one that would be chooen by
246 * New configure options --with-bugurl and --with-pkgversion, for
247 distributors to use to embed their bug-reporting and package version
248 information in --help and --version output.
250 * The ttyname and ttyname_r functions on Linux now fall back to searching for
251 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
252 allows creation of chroots without the procfs mounted on /proc.
254 * The `crypt' function now fails if passed salt bytes that violate the
255 specification for those values. On Linux, the `crypt' function will
256 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
257 enabled, and fail on encrypted strings using the MD5 or DES algorithm
258 when the mode is enabled.
260 * The `clock_*' suite of functions (declared in <time.h>) is now available
261 directly in the main C library. Previously it was necessary to link with
262 -lrt to use these functions. This change has the effect that a
263 single-threaded program that uses a function such as `clock_gettime' (and
264 is not linked with -lrt) will no longer implicitly load the pthreads
265 library at runtime and so will not suffer the overheads associated with
266 multi-thread support in other code such as the C++ runtime library.
268 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
273 * The following bugs are resolved with this release:
275 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
276 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
277 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
278 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
279 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
280 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
281 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
282 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
283 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
284 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
285 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
286 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
287 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
288 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
289 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
290 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
291 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
292 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
293 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
294 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
295 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
296 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
299 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
300 configuring glibc with:
301 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
302 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
303 Implemented by H.J. Lu.
307 + define static_assert
309 + do not declare gets
311 + declare at_quick_exit and quick_exit also for ISO C11
313 + aligned_alloc. NB: The code is deliberately allows the size parameter
314 to not be a multiple of the alignment. This is a moronic requirement
315 in the standard but it is only a requirement on the caller, not the
320 + uchar.h support added
322 + CMPLX, CMPLXF, CMPLXL added
324 Implemented by Ulrich Drepper.
326 * Support for the IA-64 has been moved to ports.
328 * Remove support for anything but ELF binary format
330 * Checking versions of poll, ppoll added.
331 Implemented by Ulrich Drepper.
333 * More generic and 64-bit performance optimizations to math functions.
334 Implemented by Ulrich Drepper.
336 * New configure option --enable-obsolete-rpc makes the deprecated RPC
337 headers and functions available at compile time as they were before
338 version 2.14. This option will be removed at some time in the future
339 after the TI-RPC library becomes fully sufficient for the needs of
340 existing applications.
342 * Compatibility code for Linux kernel versions before 2.4 has been removed.
343 Note that glibc is not expected to work with any Linux kernel version
346 * New header <sys/auxv.h> and function getauxval allowing easy access to
347 the AT_* key-value pairs passed from the Linux kernel. The header also
348 defines the HWCAP_* bits associated with the AT_HWCAP key.
350 * New locales: mag_IN
352 * New configure option --enable-systemtap builds SystemTap static probes
353 into libc for setjmp and longjmp and into libpthread for various operations.
354 So far the setjmp/longjmp probes and some of the libpthread probes are
355 provided only for i*86 and x86_64.
356 Implemented by Roland McGrath and Rayson Ho.
358 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
360 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
363 * More optimized functions for SPARC. Implemented by David S. Miller.
365 * Improved support for cross-compilation, especially bootstrap builds
366 without a previously built glibc.
368 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
369 Chris Metcalf from Tilera.
371 * Support for the old ARM ABI has been removed from ports. Only the EABI is
372 now supported for ARM processors.
374 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
375 as the name of the dynamic linker, to distinguish it from the
376 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
378 * Support for CRIS has been removed from ports.
380 * A new class of installed header has been documented for low-level
381 platform-specific functionality. PowerPC added the first instance with a
382 function to provide time base register access. Contributed by Tulio
383 Magno Quites Machado Filho.
385 * ix86 configurations now install header files that are consistent with
386 what x86-64 configurations install. These same header files can be used
387 for -m32, -m64, or -mx32 builds.
388 Contributed by H.J. Lu.
390 * Math library bug fixes. A thorough audit of all open math library bugs was
391 conducted by Joseph Myers. Significant progress was made on many math
392 library bugs resulting in more accurate exceptions and function results.
393 Many thanks to all those that contributed including Andreas Jaeger for his
394 patch review and work on the x87 trigonometric instruction issues.
396 * Timezone data is no longer installed. Timezone-related binaries and scripts
397 will continue to be installed. Users should obtain their timezone data from
398 their distribution provider or from the tzdata package at
399 <ftp://munnari.oz.au/pub/>.
403 * The following bugs are resolved with this release:
405 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
406 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
407 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
408 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
409 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
410 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
411 13484, 13506, 13515, 13523, 13524, 13538, 13540
413 * New program pldd to list loaded object of a process
414 Implemented by Ulrich Drepper.
416 * Add nss_db support back to glibc. No more dependency on Berkeley db
417 and support for initgroups lookups.
418 Implemented by Ulrich Drepper.
420 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
421 Contributed by HJ Lu.
423 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
424 Contributed by HJ Lu.
426 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
427 on x86-32 and x86-64.
428 Contributed by Liubov Dmitrieva.
430 * Optimized strchr and strrchr for SSE on x86-32.
431 Contributed by Liubov Dmitrieva.
433 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
434 for x86-64 and x86-32.
435 Contributed by Liubov Dmitrieva.
437 * New interfaces: scandirat, scandirat64
438 Implemented by Ulrich Drepper.
440 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
441 Implemented by Ulrich Drepper.
443 * nscd now also caches the netgroup database.
444 Implemented by Ulrich Drepper.
446 * Integrate libm with gcc's -ffinite-math-only option.
447 Implemented by Ulrich Drepper.
449 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
450 to math functions. Implemented by Ulrich Drepper.
452 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
453 Implemented by Ulrich Drepper.
455 * New Linux interfaces: process_vm_readv, process_vm_writev
457 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
458 Implemented by Ulrich Drepper.
460 * Optimized nearbyint and strcasecmp for PPC.
461 Implemented by Adhemerval Zanella.
463 * New locales: bho_IN, unm_US, es_CU, ta_LK
467 * The following bugs are resolved with this release:
469 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
470 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
471 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
472 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
473 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
474 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
475 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
476 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
477 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
478 12795, 12811, 12813, 12814, 12841
480 * The RPC implementation in libc is obsoleted. Old programs keep working
481 but new programs cannot be linked with the routines in libc anymore.
482 Programs in need of RPC functionality must be linked against TI-RPC.
483 The TI-RPC implementation is IPv6 enabled and there are other benefits.
485 Visible changes of this change include (obviously) the inability to link
486 programs using RPC functions without referencing the TI-RPC library and the
487 removal of the RPC headers from the glibc headers.
488 Implemented by Ulrich Drepper.
490 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
491 syncfs, setns, sendmmsg
493 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
494 yue_HK, lij_IT, mhr_RU
496 * New encodings: CP770, CP771, CP772, CP773, CP774
498 * New program sotruss to trace calls through PLTs
499 Implemented by Ulrich Drepper.
501 * The malloc hook implementation is marked deprecated and will be removed
502 from the default implementation in the next version. The design never
503 worked ever since the introduction of threads. Even programs which do
504 not create threads themselves can use multiple threads created internally.
508 * The following bugs are resolved with this release:
510 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
511 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
512 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
513 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
516 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
518 * POWER7 optimizations: memset, memcmp, strncmp
520 * New optimized string functions for x86-64: strnlen (SSE2),
521 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
522 Implemented by Ulrich Drepper.
526 * The following bugs are resolved with this release:
528 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
529 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
530 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
531 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
532 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
533 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
534 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
535 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
537 * New interfaces: pthread_getname_np, pthread_setname_np
539 * New Linux interface: recvmmsg
541 * STT_GNU_IFUNC implemented for Sparc by David Miller.
543 * The dynamic linker now recognizes supported ABI versions from the
544 EI_ABIVERSION field in the ELF header.
545 Implemented by Ulrich Drepper.
547 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
548 will not be used to fill in password fields in the passwd.byname replies.
549 Instead it is used to synthesize the shadow.byname table, should it be
550 missing. This is a useful mode in some installations involving Solaris.
551 Implemented by Ulrich Drepper.
553 * New locales: kok_IN, sq_MK, cv_RU
557 * The following bugs are resolved with this release:
559 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
560 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
561 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
562 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
563 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
564 10789, 10817, 10823, 10840, 10847
566 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
568 Implemented by Ulrich Drepper.
570 * Checking version of longjmp added that fails if an uninitialized stack
571 frame would be created. Implemented by Ulrich Drepper.
573 * STT_GNU_IFUNC is now supported in static executables.
574 Implemented by H.J. Lu.
576 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
578 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
579 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
580 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
581 Contributed by H.J. Lu.
583 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
584 Implemented by Ulrich Drepper.
586 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
588 Contributed by H.J. Lu.
590 * Support for fma instruction in AVX on x86-64.
591 Implemented by H.J. Lu and Ulrich Drepper.
593 * AVX support in x86-64 auditing support in ld.so.
594 Implemented by H.J. Lu.
596 * STB_GNU_UNIQUE support added.
597 Implemented by Ulrich Drepper.
599 * Implement second fallback mode for optimized DNS lookup for even more
600 broken environments. If two requests from the same port are not
601 handled correctly close the socket and open a new one before sending
602 the second request. The 'single-request-reopen' option in /etc/resolv.conf
603 can be used to select this mode right away, instead of rediscovering the
604 necessity is every process again.
605 Implemented by Ulrich Drepper.
607 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
608 Implemented by Adam Tkac.
610 * Optimized iconv conversions for S390x.
611 Implemented by Andreas Krebbel.
613 * Using condvars with PI mutexes is now more efficient due to kernel
614 support for requeueing to PI futexes. NPTL support added for x86-64.
615 Implemented by Ulrich Drepper.
617 * New locales: ps_AF, my_MM
621 * The following bugs are resolved with this release:
623 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
624 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
625 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
626 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
627 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
629 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
630 Implemented by Ulrich Drepper.
632 * New Linux interfaces: accept4, fallocate, fallocate64.
633 Implemented by Ulrich Drepper.
635 * Correct declarations of string function when used in C++ code. This
636 could lead to compile errors for invalid C++ code.
638 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
641 * New POSIX 2008 interface: psiginfo
642 Implemented by Ulrich Drepper.
644 * New ISO C++1x interfaces: quick_exit, at_quick_exit
645 Implemented by Ulrich Drepper.
647 * Support for selecting between multiple function definitions at runtime
648 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
650 * The libcrypt library can now use the hash function implementations in
651 NSS. Implemented by Ulrich Drepper.
653 * The malloc implementation can be compiled to be less memory efficient
654 but higher performing in multi-threaded programs.
655 Implemented by Ulrich Drepper.
657 * New locales: nan_TW@latin, ks_IN
659 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
660 Implemented by Ulrich Drepper.
662 * Extended printf hook support. It is possible to use user-defined types
663 and extend existing format specifiers.
664 Implemented by Ulrich Drepper.
666 * Handling for group shadow files has been added.
667 Implemented by Ulrich Drepper.
669 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
670 servers (the case, e.g., for some people using the built-in DNS
671 server in ADSL modems/routers). There is a once-per-process timeout
672 in case of a broken server. To avoid it, users can run nscd or put
673 'options single-request' in /etc/resolv.conf.
674 Implemented by Ulrich Drepper.
678 * The following bugs are resolved with this release:
680 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
681 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
682 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
683 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
684 6968, 6974, 6980, 6995, 7008, 7009, 7029
686 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
687 up at the same time. Implemented by Ulrich Drepper.
689 * TLS descriptors for LD and GD on x86 and x86-64.
690 Implemented by Alexandre Oliva.
692 * getaddrinfo now handles DCCP and UDPlite.
693 Implemented by Ulrich Drepper.
695 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
696 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
697 Implemented by Ulrich Drepper.
699 * New implementation of memmem, strstr, and strcasestr which is O(n).
700 Implemented by Eric Blake.
702 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
704 * Implement "e" option for popen to open file descriptor with the
705 close-on-exec flag set. Implemented by Ulrich Drepper.
707 * Implement "b" mode for fmemopen. In this mode writes writes don't
708 implicitly add a NUL byte and seeks from the end of the buffer really
709 use the buffer end, not the string length as the basis.
710 Implemented by Ulrich Drepper.
712 * Many functions, exported and internal, now atomically set the close-on-exec
713 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
715 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
717 Implemented by Pravin Satpute.
719 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
723 * The following bugs are resolved with this release:
725 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
726 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
727 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
728 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
729 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
730 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
731 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
733 * New locales: bo_CN, bo_IN, shs_CA.
735 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
737 * Sorting rules for some Indian languages (Devanagari and Gujarati).
738 Implemented by Pravin Satpute.
740 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
742 * nscd caches now all timeouts for DNS entries
743 Implemented by Ulrich Drepper.
745 * nscd is more efficient and wakes up less often.
746 Implemented by Ulrich Drepper.
748 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
749 vdprintf, and obstack_vprintf.
750 Implemented by Jakub Jelinek.
752 * Faster memset for x86-64.
753 Implemented by Harsha Jagasia and H.J. Lu.
755 * Faster memcpy on x86.
756 Implemented by Ulrich Drepper.
758 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
759 Implemented by Ulrich Drepper.
761 * Faster sqrt and sqrtf implemention for some PPC variants.
762 Implemented by Steven Munroe.
766 * The following bugs are resolved with this release:
768 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
769 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
770 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
771 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
772 5071, 5103, 5104, 5112, 5113, 5184, 5186
774 * More checking functions: fread, fread_unlocked, open*, mq_open.
775 Implemented by Jakub Jelinek and Ulrich Drepper.
777 * Extend fortification to C++. Implemented by Jakub Jelinek.
779 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
780 by not recognizing 'a' as a modifier when those specs are requested.
781 Implemented by Jakub Jelinek.
783 * PPC optimizations to math and string functions.
784 Implemented by Steven Munroe.
786 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
787 options to be passed. Implemented by Ulrich Drepper.
789 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
791 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
792 Implemented by Ulrich Drepper.
794 * Handle private futexes in the NPTL implementation.
795 Implemented by Jakub Jelinek and Ulrich Drepper.
797 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
798 Implemented by Roland McGrath and Ulrich Drepper.
800 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
802 * SHA-256 and SHA-512 based password encryption.
803 Implemented by Ulrich Drepper.
805 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
806 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
809 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
810 Implemented by Ulrich Drepper.
814 * The following bugs are resolved with this release:
816 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
817 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
818 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
819 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
820 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
821 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
822 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
825 * New Linux interfaces: epoll_pwait, sched_getcpu.
827 * New generic interfaces: strerror_l.
829 * nscd can now cache the services database. Implemented by Ulrich Drepper.
833 * The following bugs are resolved with this release:
835 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
836 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
837 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
838 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
839 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
840 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
841 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
842 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
843 3225, 3251, 3252, 3253, 3273
845 * For Linux, the sorting of addresses returned by getaddrinfo now also
846 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
847 Implemented by Ulrich Drepper.
849 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
850 Implemented by Ulrich Drepper.
852 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
854 * New iconv module for MIK. Contributed by Alexander Shopov.
856 * For sites with broken group and/or passwd database, the auto-propagate
857 option of nscd can prevent creating ID lookup entries from the results
858 of a name lookup and vice versa. This usually is no problem but some
859 site might have problems with the default behavior.
860 Implemented by Ulrich Drepper.
862 * Iterating over entire database in NIS can be slow. With the
863 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
864 to trade time for memory. The entire database will be read at once.
865 Implemented by Ulrich Drepper.
867 * The interfaces introduced in RFC 3542 have been implemented by
870 * Support for the new ELF hash table format was added by Ulrich Drepper.
872 * Support for priority inheritance mutexes added by Jakub Jelinek and
875 * Support for priority protected mutexes added by Jakub Jelinek.
877 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
878 or_IN, csb_PL, fy_NL, sr_ME.
882 * More overflow detection functions.
884 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
885 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
887 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
888 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
889 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
890 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
891 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
892 by Masahide Washizawa.
894 * It is now possible to install audit libraries for the dynamic linker using
895 LD_AUDIT. Implemented by Ulrich Drepper.
897 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
898 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
899 For a libc and libpthread that works well on Linux 2.4 kernels, we
900 recommend using the stable 2.3 branch.
902 * The new function open_wmemstream acts like open_memstream,
903 but uses a wchar_t wide character buffer.
905 * The new function ppoll is an improved version of poll, similar to pselect.
907 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
908 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
909 renameat, unlinkat, linkat, symlinkat, readlinkat.
911 * New Linux kernel system calls: unshare,
912 inotify_init, inotify_add_watch, inotify_rm_watch.
914 * The euidaccess function is now also known by the alias eaccess,
915 for compatibility with some other systems.
917 * Timezone data updated to 2006b version.
921 * The following bugs are resolved with this release:
923 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
924 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
925 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
926 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
927 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
928 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
930 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
932 * As of this release, GCC 4 can be used to compile the C Library.
934 * Timezone data updated to 2005m version.
938 * The following bugs are resolved with this release:
940 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
941 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
942 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
943 777, 787, 821, 822, 823, 825
945 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
949 * Support for RFC 3678. Real implementations exist only for Linux so far.
950 Implemented by Ulrich Drepper.
952 * nscd can now cache entries persistently. Expiring entries are reloaded.
953 For speedups the cache can be shared in memory with client processes.
954 Implemented by Ulrich Drepper.
956 * nscd can now perform SELinux checks.
957 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
959 * getaddrinfo queries are now cached. Canonical name lookup is performed
961 Implemented by Ulrich Drepper.
963 * The nothrow function attribute is used when headers are used by gcc when
964 compiling C code. This can avoid significant amounts of exception
967 * The malloc functions perform more error checking and are stricter when
968 it comes to reacting on errors. The default action is to terminate
969 the process after showing an error message. Implemented by Ulrich Drepper.
971 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
972 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
974 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
975 namespaces using the new function dlmopen(). This feature is of course,
976 like most other dynamic loading functionality, not available in statically
977 linked applications. Implemented by Ulrich Drepper.
979 * Low-overhead boundary checking variants of string and some stdio functions
980 were added. These are to be used in conjunction with a gcc patch by
981 Jakub Jelinek which adds calls to these functions if possible.
982 Implemented by Jakub Jelinek and Ulrich Drepper.
984 * Old code for several operating systems and machine architectures that
985 have not been in working condition in a long time have been removed from
986 the main source tree maintained by the GNU C Library's maintainers.
987 These files are now reside in the separate `ports' source module
988 that is usable as an add-on when building the library.
992 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
993 interrogate the dynamic linker, compatible with the Solaris interface.
995 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
996 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
998 * getifaddrs now uses the netlink interface on Linux to get its information.
999 Implemented by Thorsten Kukuk.
1001 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1002 Implemented by Ulrich Drepper.
1004 * support for non-executable stacks on x86 has been added. Changes mostly
1007 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1010 * getaddrinfo now performs destination address selection according to
1015 * Thread-safe interfaces for many functions that access locale data
1016 were added in version 2.3, but these features were omitted from NEWS.
1017 Many functions have variants with an `_l' suffix that take a `locale_t'
1018 object as a parameter rather than consulting the current locale.
1019 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1020 create and maintain `locale_t' objects. Additionally, the new function
1021 `uselocale' sets "the current locale" (as used by functions not so
1022 parameterized) set for an individual thread. These features were added
1023 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1025 * The functions getresuid, getresgid, setresuid, and setresgid, which
1026 have long been available on Linux, are now declared in <unistd.h>
1027 and are now also available on the Hurd.
1029 * ELF thread-local storage support (TLS) now works on x86-64.
1031 * The new dynamic string token $LIB is expanded in shared library names.
1032 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1034 * Aldy Hernandez contributed complete software floating point support for
1035 PowerPC machines with no FPU.
1037 * fexecve is implemented on Linux.
1039 * The `btowc' function should work at least twice as fast due to
1040 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1042 * With approriate thread add-ons cancelable functions are now implemented
1043 in libc.so as well. No need to call the function in libpthread. This
1044 change allowed to finally disable the incorrect and expensive handling
1045 of weak definition in ld.so.
1047 * Yet more PLT entries in libc.so have been removed. We finally arrived
1048 at the bare minimum. Startup times improved appropriately.
1050 * Support for the new Linux/x86 system call interface was added. The
1051 AT_SYSINFO auxiliary vector entry is recognized and handled.
1055 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1058 * iconv (the program and the interface) now accepts empty names (excluding
1059 options like //TRANSLIT) to mean "use charset of current locale".
1061 * localedef can now transliterate characters in strings which are not in
1062 the provided charmap. The information from the input locale is used.
1064 * Prelinking support was added for ELF targets. This requires additional
1065 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1067 * Read-only stdio streams now use mmap to speed up operation by eliminating
1068 copying and buffer underflows. To use add 'm' to the mode string of
1069 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1071 * The malloc functions were completely rewritten by Wolfram Gloger based
1072 on Doug Lea's malloc-2.7.0.c.
1074 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1075 implementation of regex.
1077 * Bruno Haible upgraded the iconv and locale implementation to support
1080 * Contents of the LC_* and LANG environment variables in the CEN style are
1081 not recognized anymore. It never was used. Change by Ulrich Drepper.
1083 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1084 thread-local storage (TLS) ABI on some platforms.
1085 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1087 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1088 EUC-JISX0213, and TSCII.
1090 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1091 BSD-compatible interface for getting all network interface addresses.
1092 Implementation for IPv4 by Roland McGrath.
1094 * Loading of locale data is faster due to the introduction of a locale
1095 archive. Implemented by Roland McGrath and Ulrich Drepper.
1097 * Startup times are significantly reduced by not using exported functions
1098 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1101 * Steven Munroe contributed a port to PowerPC64/Linux.
1105 * The Hurd now uses the GNU libio implementation of stdio rather than the
1106 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1108 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1109 with the same behavior as the Linux system call of the same name.
1113 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1114 128-bit long double format.
1116 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1117 IBM1161, and IBM1162 charsets.
1119 * Andreas Jaeger contributed a port to x86-64/Linux.
1121 * Peter Bruin contributed a port to PowerPC/Hurd.
1123 * libc functions using I/O streams now can handle wide-oriented streams
1126 * optimizations in the dynamic linker. Binaries created by recent binutils
1127 versions start up quicker due to reduced time spent on relocations.
1129 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1133 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1134 asinh, atanh, j0 for the 128-bit long double format.
1136 * Bruno Haible updated all the code handling Unicode in some form to
1137 support Unicode 3.1.
1139 * Speed of regex for single-byte locales is back to previous levels.
1140 Patch by Isamu Hasegawa.
1142 * Alpha, SPARC, and IA-64 now also using floating stacks.
1144 * Startup time of internationalized applications greatly improved through
1145 iconv cache. Use iconvconfig to generate the cache file.
1146 Contributed by Ulrich Drepper.
1148 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1149 severe performance problems. Patch by David Mosberger.
1151 * The Hurd port got a lot more functionality like AIO, various stdio
1152 extensions, etc. Mainly done by Roland McGrath.
1154 * mtrace can now lookup symbols in shared libraries.
1158 * Intel's IA-64 math library is largely integrated. It provides fast and
1159 accurate implementatations for most basic and standard math functions
1160 in float, double, and long double format.
1162 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1163 and asin for the 96-bit long double format and asin, log, tan for the
1164 128-bit long double format.
1166 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1167 The basic double functions exist today. Contributed by Abraham Ziv
1168 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1169 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1171 * An asynchronous name lookup library was added. The interface is designed
1172 after POSIX AIO. The proposal was circulated beforehand to get comments.
1173 No negative ones came in. Implemented by Ulrich Drepper.
1175 * Port to S390/64bit contributed by Martin Schwidefsky
1176 <schwidefsky@de.ibm.com>.
1178 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1179 of functions for Linux/IA-64.
1181 * The RPC code is now thread safe. Threads can now use the same service
1182 of different services at the same time. Patch by Eric Norum
1183 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1185 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1186 family of functions for Linux/S390.
1188 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1189 of functions for Linux/x86.
1191 * Port to Linux/CRIS contributed by Axis Communications.
1195 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1196 we can now check for namespace violations and missing declarations. The
1197 result is that almost all headers are now Unix-compliant (as defined in
1198 the upcoming XPG6). The negative side is that some programs might need
1199 corrections, too, if they depend on the incorrect form of the headers in
1200 previous versions which defined too many symbols and included too many
1203 * regex now handles multibyte character sets correctly.
1204 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1206 * iconv (the program) does now conform to the upcoming XPG6 and handles
1207 charmaps. Instead of the charset names the path of charmaps can be
1208 provided and the conversion happens based on this data.
1209 Contributed by Ulrich Drepper.
1211 * The locale program now provides detailed information about the installed
1216 only lists the names of the supported locales
1220 provides details such as country, language, and codeset name.
1221 Contributed by Ulrich Drepper.
1225 * The gencat program now parses the input file according to the charset
1226 selected by the LC_CTYPE category. This is important for stateful
1227 character sets. To make generating catalogs easier there is a way
1228 to overwrite the charset selected by the locale: before the first
1229 message or $ quote line the catalog can contain a line like
1231 $ codeset=ISO-8859-2
1233 to select the charset (ISO-8859-2 in this case).
1235 Implemented by Shinya Hanataka and Ulrich Drepper.
1237 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1238 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1239 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1241 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1242 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1244 * The LANGUAGE environment variable is now ignored unless the locale is
1245 changed from the default "C" locale.
1247 * The usual bug fixes.
1251 * Greg McGary added runtime support for bounds checking using gcc's
1252 new -fbounded-pointers option. ix86 target is complete. PowerPC
1255 * Thorsten Kukuk added secure mode support to nscd.
1257 * The Berkeley db libraries have been removed.
1259 Related, the nss_db module is now in a separate package since it
1260 obviously requires a database library being available.
1262 * Wide character I/O streams implemented by Ulrich Drepper.
1264 * Functions from the extended socket API added by Ulrich Drepper.
1266 * Functions feenableexcept and fedisableexcept to control the
1267 behaviour of individual exceptions have been added by Andreas Jaeger.
1269 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1271 * The resolver code has been updated from bind 8.2.3-T5B which supports
1272 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1275 This change could in some situations effect backward compatibility. Since
1276 now `_res' is a thread-local instead of a global variable, modifying it
1277 in one thread does not have any effect in other threads.
1279 The resolver library was also extended to allow IPv6 as the transport
1280 protocol for the requests. This work was done by Stig Venaas.
1282 * Compatibility code for K&R C compilers has been removed from the
1283 header files. A ISO C compiler is needed to use the library
1284 (conforming to either C89 or C99 standard).
1286 * Complete rewrite of the localedef program to support multibyte character
1287 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1288 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1289 Implemented by Ulrich Drepper.
1291 Bruno Haible significantly improved the generation and use of the data
1292 structures for the wide character tables.
1294 * Plural handling in gettext implemented by Ulrich Drepper.
1296 * The utmp daemon has been removed.
1298 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1300 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1303 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1305 * POSIX barriers implemented by Kaz Kylheku.
1307 * POSIX spawn function family implemented by Ulrich Drepper.
1309 * POSIX spinlocks are now available.
1311 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1313 * the configure option --enable-kernel=X.Y.Z allows to strip out
1314 compatibility for kernel versions before X.Y.Z. This is currently only
1315 implemented for Linux.
1317 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1318 field sin6_scope_id. This means that all programs using IPv6 should be
1319 recompiled. Don't expect binary compatibility with previous glibc
1322 * various conversion modules for IBM character sets contributed by
1325 * IA-64 port by Jes Sorensen and HJ Lu.
1339 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1341 * New xdr functions are added; some rpc functions are now 64bit clean.
1343 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1345 * Fixed known incompatibilities with glibc 2.0.
1347 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1349 * Optimized a number of functions (especially the ELF dynamic loader).
1351 * Update timezone data files.
1353 * lots of charmaps corrections
1355 * some new locale definitions and charmaps
1360 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1361 conform to POSIX member type requirements. Symbol versions have been
1362 adjusted as needed within the library, and for direct use by applications,
1363 but there is potential for problems if third-party libraries use
1364 struct timeval as part of their interface. This does not present
1365 a problem for X and other "essential" system libraries.
1367 * An additional locale model to support C++ Standard Library locale
1368 model and probably more was implemented by Ulrich Drepper.
1370 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1373 * Miles Bader provided the `argp' function family to support hierachical
1374 command line argument parsing, layered on top of getopt.
1376 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1378 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1381 * scanf recognizes the %a and %A format for scanning floating point numbers.
1383 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1384 information and interfaces for the available integer types.
1386 * about 130 new math functions were added to implement the ISO C9x math
1389 * the new header <complex.h> contains definitions of the complex math
1390 functions from ISO C 9X.
1392 * the new header <tgmath.h> defines generic macros to use complex or
1393 real valued functions.
1395 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1397 * Andreas Jaeger provided a test suite for the math library.
1399 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1401 * Ulrich Drepper added character set conversion functions (iconv).
1403 * Optimized string functions have been added.
1405 * The localedata addon is now part of glibc.
1407 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1409 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1410 daemon for NSS (nscd).
1412 Missing a better place here are some numbers on improvements. Under
1413 Linux 2.1.125 un-tar-ing the kernel sources takes
1417 using local files 12.19s 6.88s 22.91s
1419 using NIS 13.92s 8.91s 26.34s
1421 using NIS & nscd 10.37s 7.34s 25.30s
1423 using NIS+ 27.57s 30.37s 640.46s
1425 using NIS+ & nscd 10.25s 7.83s 26.51s
1427 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1429 Keep in mind that non-namelookup related operations dominate above times.
1430 It was just a common complain that using NIS+ unpacking the kernel is
1433 [1] The old nscd implementation is not available anymore since it was
1434 distributed with glibc up to version 2.0.98 and thus is now replaced.
1436 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1438 * Mark Kettenis provided a Hesiod NSS module.
1440 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1441 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1443 * rcmd can now handle netgroups (Dick Streefland).
1445 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1448 * Support for the IPv6 protocol has been added to the socket API, as per the
1449 latest draft standards.
1451 * Support for Linux 2.2 has been added.
1453 * Interface changes relative to the latest 2.0.x release:
1454 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1455 addseverity NEW: Unix98
1456 alphasort64 NEW: LFS
1457 argp_err_exit_status NEW: argp, GNU ext
1458 argp_error NEW: argp, GNU ext
1459 argp_failure NEW: argp, GNU ext
1460 argp_help NEW: argp, GNU ext
1461 argp_parse NEW: argp, GNU ext
1462 argp_program_bug_address NEW: argp, GNU ext
1463 argp_program_version NEW: argp, GNU ext
1464 argp_program_version_hook NEW: argp, GNU ext
1465 argp_state_help NEW: argp, GNU ext
1466 argp_usage NEW: argp, GNU ext
1467 authdes_create NEW: Secure RPC
1468 authdes_getucred NEW: Secure RPC
1469 authdes_pk_create NEW: Secure RPC
1470 backtrace NEW: GNU ext.
1471 backtrace_symbols NEW: GNU ext.
1472 backtrace_symbols_fd NEW: GNU ext.
1474 cacosf NEW: ISO C 9x
1475 cacosh NEW: ISO C 9x
1476 cacoshf NEW: ISO C 9x
1477 cacoshl NEW: ISO C 9x
1478 cacosl NEW: ISO C 9x
1485 casinf NEW: ISO C 9x
1486 casinh NEW: ISO C 9x
1487 casinhf NEW: ISO C 9x
1488 casinhl NEW: ISO C 9x
1489 casinl NEW: ISO C 9x
1491 catanf NEW: ISO C 9x
1492 catanh NEW: ISO C 9x
1493 catanhf NEW: ISO C 9x
1494 catanhl NEW: ISO C 9x
1495 catanl NEW: ISO C 9x
1496 cbc_crypt NEW: Secure RPC
1500 ccoshf NEW: ISO C 9x
1501 ccoshl NEW: ISO C 9x
1507 cimagf NEW: ISO C 9x
1508 cimagl NEW: ISO C 9x
1509 clearerr_locked REMOVED
1510 clntunix_create NEW: sunrpc ext
1512 clog10 NEW: ISO C 9x
1513 clog10f NEW: ISO C 9x
1514 clog10l NEW: ISO C 9x
1524 cprojf NEW: ISO C 9x
1525 cprojl NEW: ISO C 9x
1527 crealf NEW: ISO C 9x
1528 creall NEW: ISO C 9x
1533 csinhf NEW: ISO C 9x
1534 csinhl NEW: ISO C 9x
1537 csqrtf NEW: ISO C 9x
1538 csqrtl NEW: ISO C 9x
1542 ctanhf NEW: ISO C 9x
1543 ctanhl NEW: ISO C 9x
1545 des_setparity NEW: Secure RPC
1546 ecb_crypt NEW: Secure RPC
1547 endutxent NEW: Unix98
1549 exp10f NEW: ISO C 9x
1550 exp10l NEW: ISO C 9x
1554 fattach NEW: STREAMS
1555 fdetach NEW: STREAMS
1559 feclearexcept NEW: ISO C 9x
1560 fegetenv NEW: ISO C 9x
1561 fegetexceptflag NEW: ISO C 9x
1562 fegetround NEW: ISO C 9x
1563 feholdexcept NEW: ISO C 9x
1565 feraiseexcept NEW: ISO C 9x
1566 ferror_locked REMOVED
1567 fesetenv NEW: ISO C 9x
1568 fesetexceptflag NEW: ISO C 9x
1569 fesetround NEW: ISO C 9x
1570 fetestexcept NEW: ISO C 9x
1571 feupdateenv NEW: ISO C 9x
1572 fflush_locked REMOVED
1576 fgets_unlocked NEW: GNU ext.
1577 fileno_locked REMOVED
1589 fputc_locked REMOVED
1590 fputs_unlocked NEW: GNU ext.
1591 fread_unlocked NEW: GNU ext.
1596 fstatvfs NEW: Unix98
1600 ftruncate64 NEW: LFS
1602 fwrite_unlocked NEW: GNU ext.
1603 gai_strerror NEW: IPv6
1607 getchar_locked REMOVED
1609 getdate_err NEW: Unix98
1610 getdate_r NEW: GNU ext.
1612 getnameinfo NEW: IPv6
1613 getnetname NEW: Secure RPC
1614 getpmsg NEW: STREAMS
1615 getpt NEW: Unix98 PTY
1616 getrlimit64 NEW: LFS
1617 getutxent NEW: Unix98
1618 getutxid NEW: Unix98
1619 getutxline NEW: Unix98
1620 glob64 NEW: GNU ext.
1621 globfree64 NEW: GNU ext.
1622 gnu_get_libc_release NEW: GNU ext.
1623 gnu_get_libc_version NEW: GNU ext.
1624 grantpt NEW: Unix98 PTY
1625 host2netname NEW: Secure RPC
1627 iconv_close NEW: iconv
1628 iconv_open NEW: iconv
1629 if_freenameindex NEW: IPv6
1630 if_indextoname NEW: IPv6
1631 if_nameindex NEW: IPv6
1632 if_nametoindex NEW: IPv6
1633 in6addr_any NEW: IPv6
1634 in6addr_loopback NEW: IPv6
1635 inet6_isipv4mapped NEW: IPv6
1636 isastream NEW: STREAMS
1637 iswblank NEW: GNU ext.
1638 key_decryptsession NEW: Secure RPC
1639 key_decryptsession_pk NEW: Secure RPC
1640 key_encryptsession NEW: Secure RPC
1641 key_encryptsession_pk NEW: Secure RPC
1642 key_gendes NEW: Secure RPC
1643 key_get_conv NEW: Secure RPC
1644 key_secretkey_is_set NEW: Secure RPC
1645 key_setnet NEW: Secure RPC
1646 key_setsecret NEW: Secure RPC
1647 llrint NEW: ISO C 9x
1648 llrintf NEW: ISO C 9x
1649 llrintl NEW: ISO C 9x
1650 llround NEW: ISO C 9x
1651 llroundf NEW: ISO C 9x
1652 llroundl NEW: ISO C 9x
1657 lrintf NEW: ISO C 9x
1658 lrintl NEW: ISO C 9x
1659 lround NEW: ISO C 9x
1660 lroundf NEW: ISO C 9x
1661 lroundl NEW: ISO C 9x
1663 makecontext NEW: Unix98
1664 mempcpy NEW: GNU ext.
1667 modify_ldt NEW: kernel
1671 nearbyint NEW: ISO C 9x
1672 nearbyintf NEW: ISO C 9x
1673 nearbyintl NEW: ISO C 9x
1674 netname2host NEW: Secure RPC
1675 netname2user NEW: Secure RPC
1676 nexttoward NEW: ISO C 9x
1677 nexttowardf NEW: ISO C 9x
1678 nexttowardl NEW: ISO C 9x
1682 passwd2des NEW: Secure RPC
1684 pow10f NEW: GNU ext.
1685 pow10l NEW: GNU ext.
1688 printf_size NEW: GNU ext.
1689 printf_size_info NEW: GNU ext.
1690 profil_counter REMOVED
1691 pthread_mutexattr_getkind_np REPLACED
1692 pthread_mutexattr_setkind_np REPLACED
1693 ptsname NEW: Unix98 PTY
1694 ptsname_r NEW: Unix98 PTY
1696 putchar_locked REMOVED
1697 putgrent NEW: GNU ext.
1699 putpmsg NEW: STREAMS
1700 pututxline NEW: Unix98
1704 readdir64_r NEW: LFS
1705 remquo NEW: ISO C 9x
1706 remquof NEW: ISO C 9x
1707 remquol NEW: ISO C 9x
1709 roundf NEW: ISO C 9x
1710 roundl NEW: ISO C 9x
1712 scalbln NEW: ISO C 9x
1713 scalblnf NEW: ISO C 9x
1714 scalblnl NEW: ISO C 9x
1716 sendfile NEW: kernel
1717 setcontext NEW: Unix98
1718 setrlimit64 NEW: LFS
1719 setutxent NEW: Unix98
1721 sigignore NEW: Unix98
1722 sigqueue NEW: POSIX.1b
1723 sigrelse NEW: Unix98
1724 sigset NEW: POSIX.1b
1725 sigtimedwait NEW: POSIX.1b
1726 sigwaitinfo NEW: POSIX.1b
1727 sincos NEW: GNU ext.
1728 sincosf NEW: GNU ext.
1729 sincosl NEW: GNU ext.
1733 strcasestr NEW: GNU ext.
1734 strtoimax NEW: ISO C 9x
1735 strtoumax NEW: ISO C 9x
1736 strverscmp NEW: GNU ext.
1737 svcauthdes_stats NEW: Secure RPC
1738 svcunix_create NEW: sunrpc etx
1739 svcunixfd_create NEW: sunrpc ext
1740 swapcontext NEW: Unix98
1741 tcgetsid NEW: Unix98 PTY
1742 tdestroy NEW: GNU ext.
1743 tgamma NEW: ISO C 9x
1744 tgammaf NEW: ISO C 9x
1745 tgammal NEW: ISO C 9x
1749 truncf NEW: ISO C 9x
1750 truncl NEW: ISO C 9x
1752 unlockpt NEW: Unix98 PTY
1753 updwtmpx NEW: Unix98
1754 user2netname NEW: Secure RPC
1755 utmpxname NEW: Unix98
1756 versionsort NEW: GNU ext.
1757 versionsort64 NEW: GNU ext.
1759 wcscasecmp NEW: GNU ext.
1760 wcsncasecmp NEW: GNU ext.
1761 wcsnlen NEW: GNU ext.
1762 wcstoimax NEW: ISO C 9x
1763 wcstoll NEW: ISO C 9x
1764 wcstoull NEW: ISO C 9x
1765 wcstoumax NEW: ISO C 9x
1767 wordexp NEW: POSIX.2
1768 wordfree NEW: POSIX.2
1769 write_profiling REMOVED
1770 xdecrypt NEW: Secure RPC
1771 xdr_authdes_cred NEW: Secure RPC
1772 xdr_authdes_verf NEW: Secure RPC
1773 xdr_cryptkeyarg NEW: Secure RPC
1774 xdr_cryptkeyarg2 NEW: Secure RPC
1775 xdr_cryptkeyres NEW: Secure RPC
1776 xdr_getcredres NEW: Secure RPC
1777 xdr_key_netstarg NEW: Secure RPC
1778 xdr_key_netstres NEW: Secure RPC
1779 xdr_keybuf NEW: Secure RPC
1780 xdr_keystatus NEW: Secure RPC
1781 xdr_netnamestr NEW: Secure RPC
1782 xdr_sizeof NEW: Secure RPC
1783 xdr_unixcred NEW: sunrpc ext
1784 xencrypt NEW: Secure RPC
1785 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1796 * inet_ntoa is thread-safe
1798 * updwtmp is moved from libutil to libc
1800 * rewrite of cbrt function
1802 * update of timezone data
1816 * add atoll function
1818 * fix complex problems in Berkeley DB code
1820 * fix math functions
1824 * fixed lots of header problems (especially Linux/GNU specific)
1826 * dynamic loader preserves all registers
1828 * Roland McGrath provided support for handling of auxiliary objects in
1829 the ELF dynamic loader.
1831 * support for parallel builds is improved
1835 * GNU extensions are no longer declared by default. To enable them you
1836 must define the macro `_GNU_SOURCE' in your program or compile with
1839 * The library has changed from using GNU ld symbol aliases to using weak
1840 symbols where available. The ELF object file format supports weak
1841 symbols; GNU ld also supports weak symbols in the a.out format. (There
1842 is also now support for other GNU ld extensions in ELF. Use the
1843 `--with-elf' option to configure to indicate you have ELF, and
1844 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1845 of many files which contained only symbol aliases, reducing the size of
1846 the source and the compiled library; many other files were renamed to
1847 less cryptic names previously occupied by the symbol alias files.
1848 There is a new header file <elf.h> for programs which operate on
1849 files in the ELF format.
1851 * Converted to Autoconf version 2, so `configure' has more options.
1852 Run `configure --help' to see the details.
1854 * The library can now be configured to build profiling, highly-optimized
1855 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1856 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1857 `configure' enable building these extra libraries. The shared library is
1858 built by default when using both ELF and GNU ld. When shared libraries
1859 are enabled, the new library `-ldl' is available for arbitrary run-time
1860 loading of shared objects; its interface is defined in <dlfcn.h>. The
1861 new header file <link.h> gives access to the internals of the run-time
1862 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1863 application of same name on other systems and it provides information
1864 about dynamically linked binaries.
1866 * The C library now provides the run-time support code for profiling
1867 executables compiled with `-pg'. Programs can control the profiling code
1868 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1869 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1870 the support for this file format was contributed by David Mosberger-Tang.
1872 * The math code has been replaced with a math library based on fdlibm from
1873 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1874 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1875 functions. The math functions now reside in a separate library, so
1876 programs using them will need to use `-lm' their linking commands.
1878 * John C. Bowman contributed optimized ix87 assembler inline functions.
1880 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1881 mechanism similar to that found in Solaris 2. This is now used for the
1882 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1883 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1884 file controls what services are used for each individual database. This
1885 works by loading shared libraries with names specified in `nsswitch.conf',
1886 so service modules can be changed or added at any time without even
1887 relinking any program. Currently there are the file, db, and NIS based
1888 NSS services available.
1890 * The new functions `strtoq' and `strtouq' parse integer values from
1891 strings, like `strtol' and `strtoul', but they return `long long int' and
1892 `unsigned long long int' values, respectively (64-bit quantities).
1894 * The new functions `strtof' and `strtold' parse floating-point values from
1895 strings, like `strtod', but they return `float' and `long double' values,
1896 respectively (on some machines `double' and `long double' are the same).
1898 * Ulrich Drepper has contributed new implementations of the floating-point
1899 printing and reading code used in the `printf' family of functions and
1900 `strtod', `strtof', and `strtold'. These new functions are perfectly
1901 accurate, and much faster than the old ones.
1903 * The implementation of the POSIX locale model was completely rewritten by
1904 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1905 to compile the POSIX locale definition.
1907 * The former dummy implementations of the strcoll and strxfrm function are
1908 now replaced by fully functional code contributed by Ulrich Drepper. The
1909 collation information comes from the POSIX locale definitions.
1911 * The new header <langinfo.h> defines an interface for accessing
1912 various locale-dependent data (using the locale chosen with `setlocale').
1914 * Ulrich Drepper has contributed a new suite of functions for operation on
1915 wide-character and multibyte-character strings, in <wchar.h>;
1916 and classification and case conversion of wide characters, in <wctype.h>.
1917 These new functions are conforming to the ISO C, Amendement 1 specification.
1919 * There is now a second implementation of the standard I/O library available.
1920 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1921 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1923 * You can now use positional parameter specifications in format strings
1924 for the `printf' and `scanf' families of functions. For example,
1925 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1926 ``Number 6, Mr Jones''. This is mainly useful when providing different
1927 format strings for different languages, whose grammars may dictate
1928 different orderings of the values being printed. To support this
1929 feature, the interface for `register_printf_handler' has changed; see
1930 the header file <printf.h> for details.
1932 * The `printf' and `scanf' families of functions now understand a new
1933 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1934 to group numbers as indicated by the locale; for `scanf' and friends, this
1935 says to accept as valid only a number with all the proper grouping
1936 separators in the right places. In the default "C" locale, numbers are
1937 not grouped; but locales for specific countries will define the usual
1938 conventions (i.e. separate thousands with `,' in the US locale).
1940 * The pgrp functions have been regularized, slightly incompatibly but much
1941 less confusingly. The core functions are now `getpgid' and `setpgid',
1942 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1943 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1944 provided for compatibility. There is no longer an incompatible `getpgrp'
1945 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1947 * The new header file <fts.h> and suite of functions simplify programs that
1948 operate on directory trees. This code comes from 4.4 BSD.
1950 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1951 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1952 NSS scheme used in glibc.
1954 * There is a new malloc debugging hook `__memalign_hook'.
1956 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1957 `unsigned int' in <sys/types.h>. These are for compatibility only and
1958 their use is discouraged.
1960 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1961 done differently, so that it works even without GNU ld.
1963 * New function `euidaccess' checks allowed access to a file like `access',
1964 but using the effective IDs instead of the real IDs.
1966 * The time zone data files have been updated for the latest and greatest
1967 local time conventions of the countries of the world.
1969 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1972 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1973 for formatting floating-point numbers. They are provided only for
1974 compatibility; new programs should use `sprintf' instead. There are
1975 also equivalent function for the `long double' floating-point type and
1976 all functions also exist in a reentrant form.
1978 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1979 functions for maintaining the login-record files (primarily of use to
1980 system programs such as `login'), and convenient functions for
1981 allocating and initializing a pseudo-terminal (pty) device.
1983 * Ulrich Drepper has contributed new support for System V style
1984 shared memory and IPC on systems that support it.
1986 * Ulrich Drepper has contributed several miscellaneous new functions found
1987 in System V: The `hsearch' family of functions provide an effective
1988 implementation of hash tables; `a64l' and `l64a' provide a very simple
1989 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1992 * Ulrich Drepper has contributed new reentrant counterparts for the
1993 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1995 * Ulrich Drepper has contributed new, highly-optimized versions of several
1996 string functions for the i486/Pentium family of processors.
1998 * Ulrich Drepper has updated the Linux-specific code, based largely
1999 on work done in Hongjiu Lu's version of GNU libc for Linux.
2000 The GNU library now supports Linux versions 2.0.10 and later,
2001 using the ELF object file format (i[3456]86-*-linux).
2003 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2005 * David Mosberger-Tang and Richard Henderson have ported the C library
2006 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2007 dynamic linking support for ELF/Alpha.
2009 * Richard Henderson contributed several Alpha optimized assembler function
2010 for arithmetic and string handling.
2012 * Ulrich Drepper has contributed a new set of message catalog functions to
2013 support multiple languages using the <libintl.h> interface, for use with
2014 his new package GNU gettext. Translation volunteers have contributed
2015 catalogs of the library's messages in Spanish, German, and Korean.
2017 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2018 program and the `catgets' function for reading the catalog files it
2019 creates. (The <libintl.h> interface is preferred; we include the
2020 <nl_types.h> interface using `catgets' only for source compatibility with
2021 programs already written to use it.)
2023 * New header file <values.h> gives SVID-compatible names for <limits.h>
2026 * Various new macros, declarations, and small header files for compatibility
2029 * New function `group_member' is a convenient way to check if a process has
2030 a given effective group ID.
2032 * When using GCC 2.7 and later, the socket functions are now declared in a
2033 special way so that passing an argument of type `struct sockaddr_in *',
2034 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2035 `struct sockaddr *' type, does not generate a type-clash warning.
2037 * New function `error' declared in header file <error.h> is a convenient
2038 function for printing error messages and optionally exiting; this is the
2039 canonical function used in GNU programs. The new functions `err', `warn',
2040 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2041 doing the same thing.
2043 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2044 POSIX.2 `glob' function to do ~ and {...} expansion.
2046 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2047 `clearenv' which is used in POSIX.9 is also available.
2049 * New function `getsid' returns session ID number on systems that support it.
2051 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2052 files <db.h> and <mpool.h> provide a rich set of functions for several
2053 types of simple databases stored in memory and in files, and <ndbm.h> is
2054 an old `ndbm'-compatible interface using the `db' functions. Link with
2055 `-ldb' to get these functions.
2057 * New macro `strdupa' copies a string like `strdup', but uses local stack
2058 space from `alloca' instead of dynamic heap space from `malloc'.
2060 * New function `strnlen' is like `strlen' but searches only a given maximum
2061 number of characters for the null terminator. `stpncpy', `strndup' and
2062 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2065 * New function `statfs' in header <sys/statfs.h>.
2067 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2068 provide convenient functions for operating on blocks of null-terminated
2071 * A new suite of functions in <utmp.h> handle all the details of reading
2072 and writing the utmp file.
2074 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2077 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2078 completely POSIX compliant and also implemented the extended functionality
2079 to handle alternate digit representation and alternate era date formats.
2081 * Ulrich Drepper provided an implementation of the `strptime' function
2082 defined in XPG4.2 which transforms a string into a `struct tm' value.
2084 * Paul Eggert provided the tzselect shell script as part of the timezone
2085 code. The shell script makes it easy to select the correct timezone
2088 * The implementation of the malloc family of functions is completely replaced
2089 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2090 The implementation uses the mmap function (if available) and it is
2091 optimized for the use in multi threaded programs.
2093 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2094 functions. This new functionality is usable by specifying a special
2095 salt string and it is compatible with implementation on *BSD systems.
2097 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2098 `getsubopt' to handle second level command line options, `bsd_signal'
2099 to access BSD style `signal' functionality, the obsolete `regexp' style
2102 * the `lchown' function is available on system which support this
2105 * The implementation of the shadow password handling function was contributed
2108 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2110 * POSIX.1g support was added. The <sys/select.h> header is available,
2111 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2112 implementation of `getaddrinfo'.
2116 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2118 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2119 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2121 * The new function `daemon' from 4.4 BSD is useful for server programs that
2122 want to put themselves in the background.
2124 * Joel Sherrill has contributed support for several standalone boards that
2125 run without an operating system.
2127 * `printf', `scanf' and friends now accept a `q' type modifier for long
2128 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2130 * All of the code taken from BSD (notably most of the math and networking
2131 routines) has been updated from the BSD 4.4-Lite release.
2133 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2135 * The new functions `getdomainname' and `setdomainname' fetch or change the
2136 YP/NIS domain name. These are system calls which exist on systems which
2139 * The time zone data files have been updated for the latest international
2142 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2143 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2147 * The C library now includes support for Sun RPC, from Sun's free
2148 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2149 are included. (There is still no support for YP.)
2151 * Tom Quinn has contributed a port of the C library to SGI machines running
2152 Irix 4 (mips-sgi-irix4).
2154 * The new `lockf' function is a simplified interface to the locking
2155 facilities of `fcntl', included for compatibility.
2157 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2159 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2161 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2164 * The error message printed by `assert' for a failed assertion now includes
2165 the name of the program (if using GNU ld) and the name of the calling
2166 function (with versions of GCC that support this).
2168 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2170 * The library now includes the <sys/mman.h> header file and memory
2171 management functions `mmap', `munmap', `mprotect', `msync', and
2172 `madvise', on systems that support those facilities.
2174 * The interface for `mcheck' has changed slightly: the function called to
2175 abort the program when an allocation inconsistency is detected now takes
2176 an argument that indicates the type of failure. The new function
2177 `mprobe' lets you request a consistency check for a particular block at
2178 any time (checks are normally done only when you call `free' or `realloc'
2181 * It is now possible to easily cross-compile the C library, building on one
2182 system a library to run on another machine and/or operating system. All
2183 you need to do is set the variable `HOST_CC' in `configparms' to the
2184 native compiler for programs to run on the machine you are building on (a
2185 few generator programs are used on Unix systems); set `CC' to the
2188 * The new function `fexecve' (only implemented on the GNU system) executes
2189 a program file given a file descriptor already open on the file.
2193 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2194 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2196 * You can set the variable `libprefix' in `configparms' to specify a prefix
2197 to be prepended to installed library files; this makes it easy to install
2198 the GNU C library to be linked as `-lgnuc' or whatever.
2200 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2201 copies a limited number of characters from a string, and returns the
2202 address of the last character written.
2204 * You no longer need to check for whether the installed `stddef.h' is
2205 compatible with the GNU C library. configure now checks for you.
2207 * You can now define a per-stream `fileno' function to convert the
2208 stream's cookie into an integral file descriptor.
2210 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2211 allocates zero bytes of storage, and returns a unique pointer which
2212 you can pass to `realloc' or `free'. The behavior is undefined if
2213 you dereference this pointer.
2215 * The C library now runs on Sony NEWS m68k machines running either
2216 NewsOS 3 or NewsOS 4.
2218 * The new `syscall' function is a system-dependent primitive function
2219 for invoking system calls. It has the canonical behavior on Unix
2220 systems, including unreliable return values for some calls (such as
2221 `pipe', `fork' and `getppid').
2223 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2224 to `EAGAIN', which is the preferred name. On systems whose kernels
2225 use two distinct codes, the C library now translates EWOULDBLOCK to
2226 EAGAIN in every system call function.
2230 * The GNU C Library Reference Manual is now distributed with the library.
2231 `make dvi' will produce a DVI file of the printed manual.
2232 `make info' will produce Info files that you can read on line using C-h i
2233 in Emacs or the `info' program.
2234 Please send comments on the manual to bug-glibc-manual@gnu.org.
2236 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2238 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2240 * Jason Merrill has contributed a port to the Sequent Symmetry running
2241 Dynix version 3 (i386-sequent-dynix).
2243 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2244 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2246 * New function `memory_warnings' lets you arrange to get warnings when
2247 malloc is running out of memory to allocate, like Emacs gives you.
2249 * The C library now contains the relocating allocator used in Emacs 19 for
2250 its editing buffers. This allocator (ralloc) minimizes allocation
2251 overhead and fragmentation by moving allocated regions around whenever it
2252 needs to. You always refer to a ralloc'd region with a "handle" (a
2253 pointer to a pointer--an object of type `void **').
2255 * There is a new `printf' format: `%m' gives you the string corresponding
2256 to the error code in `errno'.
2258 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2259 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2260 pass, the `a' modifier says to fill in a `char **' you pass with a
2263 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2264 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2265 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2267 * `mkstemp' is a traditional Unix function to atomically create and open a
2268 uniquely-named temporary file.
2272 * The standard location for the file that says what the local timezone is
2273 has changed again. It is now `/usr/local/etc/localtime' (or more
2274 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2276 * The distribution no longer contains any files with names longer than 14
2279 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2280 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2282 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2286 * The configuration process has changed quite a bit. The `configure'
2287 script is now used just like the configuration scripts for other GNU
2288 packages. The `sysdeps' directory hierarchy is much rearranged.
2289 The file `INSTALL' explains the new scheme in detail.
2291 * The header files no longer need to be processed into ANSI C and
2292 traditional C versions. There is just one set of files to install, and
2293 it will work with ANSI or old C compilers (including `gcc -traditional').
2295 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2296 MIPS DECStation running Ultrix 4.
2298 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2299 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2300 made itself into a shared library.
2302 * Yet further improved support for the i386, running 4.3 BSD-like systems
2303 (such as Mach 3 with the Unix single-server), or System V.
2305 * New function `strncasecmp' to do case-insensitive string comparison
2306 with limited length.
2308 * New function `strsep' is a reentrant alternative to `strtok'.
2310 * New functions `scandir' and `alphasort' for searching directories.
2312 * New function `setenv' is a better interface to `putenv'.
2314 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2315 function for traversing a directory tree.
2317 * The GNU obstack package is now also part of the C library.
2318 The new function `open_obstack_stream' creates a stdio stream that
2319 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2320 formatted output directly to an obstack.
2322 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2323 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2325 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2327 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2328 things to your strings.
2330 * There are some new test programs: test-fseek, testmb, and testrand.
2332 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2333 These ports are not finished, but are a good starting place for really
2334 supporting those systems.
2336 * `/etc/localtime' is now the standard location for the file that says what
2337 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2338 This follows the general principle that `/etc' is the place for all local
2339 configuration files.
2341 * The C library header files now use `extern "C"' when used by the C++
2342 compiler, so the C library should now work with C++ code.
2344 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2345 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2348 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2349 function which uses the `merge sort' algorithm, and is said to be
2350 significantly faster than the old GNU `qsort' function. Merge sort is
2351 now the standard `qsort' function. The new algorithm can require a lot
2352 of temporary storage; so, the old sorting function is called when the
2353 required storage is not available.
2355 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2356 provides the Unix `crypt' function, plus some other entry points.
2358 * The code and header files taken from 4.4 BSD have been updated with the
2359 latest files released from Berkeley.
2361 ----------------------------------------------------------------------
2362 Copyright information:
2364 Copyright (C) 1992-2013 Free Software Foundation, Inc.
2366 Permission is granted to anyone to make or distribute verbatim copies
2367 of this document as received, in any medium, provided that the
2368 copyright notice and this permission notice are preserved,
2369 thus giving the recipient permission to redistribute in turn.
2371 Permission is granted to distribute modified versions
2372 of this document, or of portions of it,
2373 under the above conditions, provided also that they
2374 carry prominent notices stating who last changed them.
2377 version-control: never
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