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 13985, 14155, 14699, 15427, 15522, 15531, 15532, 15640, 15736, 15748,
13 15749, 15797, 15844, 15849, 15855, 15856, 15857, 15859, 15867, 15886,
14 15887, 15890, 15892, 15893, 15895, 15897, 15905, 15909, 15919, 15921,
15 15923, 15939, 15963, 15966.
17 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
18 to the d_name member of struct dirent, or omit the terminating NUL
19 character. (Bugzilla #14699).
21 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
22 aligned_alloc functions could allocate too few bytes or corrupt the
23 heap when passed very large allocation size values (Bugzilla #15855,
26 * New locales: quz_PE, ak_GH.
28 * The LC_ADDRESS field was updated to support country_car for almost all
31 * ISO 1427 definitions were updated.
33 * The configure option --disable-versioning has been removed. Builds with
34 --disable-versioning had not worked for several years.
36 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
37 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
39 * SystemTap probes for malloc have been introduced.
44 * The following bugs are resolved with this release:
46 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
47 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
48 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
49 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
50 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
51 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
52 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
53 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
54 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
55 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
56 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
57 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
58 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
61 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
62 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
63 Distributions can re-enable building and using pt_chown via the new configure
64 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
65 considerable security risks and should only be used if the distribution
66 understands and accepts the risks.
68 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
71 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
72 fixed (Bugzilla #15330).
74 * Add support for calling C++11 thread_local object destructors on thread
75 and program exit. This needs compiler support for offloading C++11
76 destructor calls to glibc.
78 * Improved worst case performance of libm functions with double inputs and
81 * Support for priority inherited mutexes in pthread condition variables on
82 non-x86 architectures.
84 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
86 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
88 * Optimized string functions for ARM. Implemented by Will Newton and
91 * Optimized libm functions for SPARC. Implemented by David S. Miller.
93 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
96 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
97 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
99 * Added a benchmark framework to track performance of functions in glibc.
101 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
102 It is based on draft TS 18661 and currently enabled as a GNU extension.
104 * On Linux, the clock function now uses the clock_gettime system call
105 for improved precision, rather than old times system call.
107 * Added new API functions pthread_getattr_default_np and
108 pthread_setattr_default_np to get and set the default pthread
109 attributes of a process.
111 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
112 This may improve lock scaling of existing programs on TSX capable systems.
113 When the --enable-lock-elision=yes parameter is specified at configure
114 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
117 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
118 availability). Implemented by Ryan S. Arnold.
120 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
124 * The following bugs are resolved with this release:
126 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
127 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
128 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
129 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
130 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
131 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
132 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
133 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
134 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
135 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
136 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
137 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
138 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
139 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
140 14879, 14889, 14893, 14898, 14914.
142 * Optimization of memcpy for MIPS.
144 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
145 EMFILE has been fixed (Bugzilla #14889).
147 * The add-on ports collection is now distributed in the "ports" subdirectory
148 of the main GNU C Library distribution, rather than separately.
150 * Port to ARM AArch64 contributed by Linaro.
152 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
153 Optimized versions of memcpy, memset, and memcmp added for System z10 and
155 Implemented by Andreas Krebbel.
157 * The new function secure_getenv allows secure access to the environment,
158 returning NULL if running in a SUID/SGID process. This function replaces
159 the internal function __secure_getenv.
161 * SystemTap static probes have been added into the dynamic linker.
162 Implemented by Gary Benson.
164 * Optimizations of string functions strstr, strcasestr and memmem.
165 Implemented by Maxim Kuvyrkov.
167 * The minimum Linux kernel version that this version of the GNU C Library
168 can be used with is 2.6.16.
170 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
171 powerpc POWER7. Implemented by Will Schmidt.
173 * New configure option --disable-nscd builds the C library such that it
174 never attempts to contact the Name Service Caching Daemon (nscd).
175 New configure option --disable-build-nscd avoids building nscd itself;
176 this is the default if --disable-nscd is used.
178 * Improved support for cross-compilation, including cross-testing and
179 bootstrap builds without a previously built glibc.
181 * Several testsuite tests are now able to test multiple IFUNC variants of an
182 interface, rather than just testing the one that would be chooen by
185 * New configure options --with-bugurl and --with-pkgversion, for
186 distributors to use to embed their bug-reporting and package version
187 information in --help and --version output.
189 * The ttyname and ttyname_r functions on Linux now fall back to searching for
190 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
191 allows creation of chroots without the procfs mounted on /proc.
193 * The `crypt' function now fails if passed salt bytes that violate the
194 specification for those values. On Linux, the `crypt' function will
195 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
196 enabled, and fail on encrypted strings using the MD5 or DES algorithm
197 when the mode is enabled.
199 * The `clock_*' suite of functions (declared in <time.h>) is now available
200 directly in the main C library. Previously it was necessary to link with
201 -lrt to use these functions. This change has the effect that a
202 single-threaded program that uses a function such as `clock_gettime' (and
203 is not linked with -lrt) will no longer implicitly load the pthreads
204 library at runtime and so will not suffer the overheads associated with
205 multi-thread support in other code such as the C++ runtime library.
207 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
212 * The following bugs are resolved with this release:
214 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
215 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
216 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
217 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
218 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
219 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
220 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
221 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
222 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
223 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
224 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
225 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
226 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
227 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
228 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
229 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
230 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
231 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
232 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
233 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
234 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
235 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
238 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
239 configuring glibc with:
240 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
241 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
242 Implemented by H.J. Lu.
246 + define static_assert
248 + do not declare gets
250 + declare at_quick_exit and quick_exit also for ISO C11
252 + aligned_alloc. NB: The code is deliberately allows the size parameter
253 to not be a multiple of the alignment. This is a moronic requirement
254 in the standard but it is only a requirement on the caller, not the
259 + uchar.h support added
261 + CMPLX, CMPLXF, CMPLXL added
263 Implemented by Ulrich Drepper.
265 * Support for the IA-64 has been moved to ports.
267 * Remove support for anything but ELF binary format
269 * Checking versions of poll, ppoll added.
270 Implemented by Ulrich Drepper.
272 * More generic and 64-bit performance optimizations to math functions.
273 Implemented by Ulrich Drepper.
275 * New configure option --enable-obsolete-rpc makes the deprecated RPC
276 headers and functions available at compile time as they were before
277 version 2.14. This option will be removed at some time in the future
278 after the TI-RPC library becomes fully sufficient for the needs of
279 existing applications.
281 * Compatibility code for Linux kernel versions before 2.4 has been removed.
282 Note that glibc is not expected to work with any Linux kernel version
285 * New header <sys/auxv.h> and function getauxval allowing easy access to
286 the AT_* key-value pairs passed from the Linux kernel. The header also
287 defines the HWCAP_* bits associated with the AT_HWCAP key.
289 * New locales: mag_IN
291 * New configure option --enable-systemtap builds SystemTap static probes
292 into libc for setjmp and longjmp and into libpthread for various operations.
293 So far the setjmp/longjmp probes and some of the libpthread probes are
294 provided only for i*86 and x86_64.
295 Implemented by Roland McGrath and Rayson Ho.
297 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
299 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
302 * More optimized functions for SPARC. Implemented by David S. Miller.
304 * Improved support for cross-compilation, especially bootstrap builds
305 without a previously built glibc.
307 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
308 Chris Metcalf from Tilera.
310 * Support for the old ARM ABI has been removed from ports. Only the EABI is
311 now supported for ARM processors.
313 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
314 as the name of the dynamic linker, to distinguish it from the
315 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
317 * Support for CRIS has been removed from ports.
319 * A new class of installed header has been documented for low-level
320 platform-specific functionality. PowerPC added the first instance with a
321 function to provide time base register access. Contributed by Tulio
322 Magno Quites Machado Filho.
324 * ix86 configurations now install header files that are consistent with
325 what x86-64 configurations install. These same header files can be used
326 for -m32, -m64, or -mx32 builds.
327 Contributed by H.J. Lu.
329 * Math library bug fixes. A thorough audit of all open math library bugs was
330 conducted by Joseph Myers. Significant progress was made on many math
331 library bugs resulting in more accurate exceptions and function results.
332 Many thanks to all those that contributed including Andreas Jaeger for his
333 patch review and work on the x87 trigonometric instruction issues.
335 * Timezone data is no longer installed. Timezone-related binaries and scripts
336 will continue to be installed. Users should obtain their timezone data from
337 their distribution provider or from the tzdata package at
338 <ftp://munnari.oz.au/pub/>.
342 * The following bugs are resolved with this release:
344 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
345 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
346 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
347 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
348 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
349 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
350 13484, 13506, 13515, 13523, 13524, 13538, 13540
352 * New program pldd to list loaded object of a process
353 Implemented by Ulrich Drepper.
355 * Add nss_db support back to glibc. No more dependency on Berkeley db
356 and support for initgroups lookups.
357 Implemented by Ulrich Drepper.
359 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
360 Contributed by HJ Lu.
362 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
363 Contributed by HJ Lu.
365 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
366 on x86-32 and x86-64.
367 Contributed by Liubov Dmitrieva.
369 * Optimized strchr and strrchr for SSE on x86-32.
370 Contributed by Liubov Dmitrieva.
372 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
373 for x86-64 and x86-32.
374 Contributed by Liubov Dmitrieva.
376 * New interfaces: scandirat, scandirat64
377 Implemented by Ulrich Drepper.
379 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
380 Implemented by Ulrich Drepper.
382 * nscd now also caches the netgroup database.
383 Implemented by Ulrich Drepper.
385 * Integrate libm with gcc's -ffinite-math-only option.
386 Implemented by Ulrich Drepper.
388 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
389 to math functions. Implemented by Ulrich Drepper.
391 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
392 Implemented by Ulrich Drepper.
394 * New Linux interfaces: process_vm_readv, process_vm_writev
396 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
397 Implemented by Ulrich Drepper.
399 * Optimized nearbyint and strcasecmp for PPC.
400 Implemented by Adhemerval Zanella.
402 * New locales: bho_IN, unm_US, es_CU, ta_LK
406 * The following bugs are resolved with this release:
408 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
409 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
410 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
411 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
412 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
413 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
414 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
415 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
416 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
417 12795, 12811, 12813, 12814, 12841
419 * The RPC implementation in libc is obsoleted. Old programs keep working
420 but new programs cannot be linked with the routines in libc anymore.
421 Programs in need of RPC functionality must be linked against TI-RPC.
422 The TI-RPC implementation is IPv6 enabled and there are other benefits.
424 Visible changes of this change include (obviously) the inability to link
425 programs using RPC functions without referencing the TI-RPC library and the
426 removal of the RPC headers from the glibc headers.
427 Implemented by Ulrich Drepper.
429 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
430 syncfs, setns, sendmmsg
432 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
433 yue_HK, lij_IT, mhr_RU
435 * New encodings: CP770, CP771, CP772, CP773, CP774
437 * New program sotruss to trace calls through PLTs
438 Implemented by Ulrich Drepper.
440 * The malloc hook implementation is marked deprecated and will be removed
441 from the default implementation in the next version. The design never
442 worked ever since the introduction of threads. Even programs which do
443 not create threads themselves can use multiple threads created internally.
447 * The following bugs are resolved with this release:
449 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
450 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
451 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
452 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
455 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
457 * POWER7 optimizations: memset, memcmp, strncmp
459 * New optimized string functions for x86-64: strnlen (SSE2),
460 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
461 Implemented by Ulrich Drepper.
465 * The following bugs are resolved with this release:
467 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
468 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
469 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
470 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
471 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
472 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
473 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
474 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
476 * New interfaces: pthread_getname_np, pthread_setname_np
478 * New Linux interface: recvmmsg
480 * STT_GNU_IFUNC implemented for Sparc by David Miller.
482 * The dynamic linker now recognizes supported ABI versions from the
483 EI_ABIVERSION field in the ELF header.
484 Implemented by Ulrich Drepper.
486 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
487 will not be used to fill in password fields in the passwd.byname replies.
488 Instead it is used to synthesize the shadow.byname table, should it be
489 missing. This is a useful mode in some installations involving Solaris.
490 Implemented by Ulrich Drepper.
492 * New locales: kok_IN, sq_MK, cv_RU
496 * The following bugs are resolved with this release:
498 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
499 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
500 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
501 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
502 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
503 10789, 10817, 10823, 10840, 10847
505 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
507 Implemented by Ulrich Drepper.
509 * Checking version of longjmp added that fails if an uninitialized stack
510 frame would be created. Implemented by Ulrich Drepper.
512 * STT_GNU_IFUNC is now supported in static executables.
513 Implemented by H.J. Lu.
515 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
517 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
518 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
519 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
520 Contributed by H.J. Lu.
522 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
523 Implemented by Ulrich Drepper.
525 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
527 Contributed by H.J. Lu.
529 * Support for fma instruction in AVX on x86-64.
530 Implemented by H.J. Lu and Ulrich Drepper.
532 * AVX support in x86-64 auditing support in ld.so.
533 Implemented by H.J. Lu.
535 * STB_GNU_UNIQUE support added.
536 Implemented by Ulrich Drepper.
538 * Implement second fallback mode for optimized DNS lookup for even more
539 broken environments. If two requests from the same port are not
540 handled correctly close the socket and open a new one before sending
541 the second request. The 'single-request-reopen' option in /etc/resolv.conf
542 can be used to select this mode right away, instead of rediscovering the
543 necessity is every process again.
544 Implemented by Ulrich Drepper.
546 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
547 Implemented by Adam Tkac.
549 * Optimized iconv conversions for S390x.
550 Implemented by Andreas Krebbel.
552 * Using condvars with PI mutexes is now more efficient due to kernel
553 support for requeueing to PI futexes. NPTL support added for x86-64.
554 Implemented by Ulrich Drepper.
556 * New locales: ps_AF, my_MM
560 * The following bugs are resolved with this release:
562 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
563 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
564 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
565 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
566 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
568 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
569 Implemented by Ulrich Drepper.
571 * New Linux interfaces: accept4, fallocate, fallocate64.
572 Implemented by Ulrich Drepper.
574 * Correct declarations of string function when used in C++ code. This
575 could lead to compile errors for invalid C++ code.
577 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
580 * New POSIX 2008 interface: psiginfo
581 Implemented by Ulrich Drepper.
583 * New ISO C++1x interfaces: quick_exit, at_quick_exit
584 Implemented by Ulrich Drepper.
586 * Support for selecting between multiple function definitions at runtime
587 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
589 * The libcrypt library can now use the hash function implementations in
590 NSS. Implemented by Ulrich Drepper.
592 * The malloc implementation can be compiled to be less memory efficient
593 but higher performing in multi-threaded programs.
594 Implemented by Ulrich Drepper.
596 * New locales: nan_TW@latin, ks_IN
598 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
599 Implemented by Ulrich Drepper.
601 * Extended printf hook support. It is possible to use user-defined types
602 and extend existing format specifiers.
603 Implemented by Ulrich Drepper.
605 * Handling for group shadow files has been added.
606 Implemented by Ulrich Drepper.
608 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
609 servers (the case, e.g., for some people using the built-in DNS
610 server in ADSL modems/routers). There is a once-per-process timeout
611 in case of a broken server. To avoid it, users can run nscd or put
612 'options single-request' in /etc/resolv.conf.
613 Implemented by Ulrich Drepper.
617 * The following bugs are resolved with this release:
619 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
620 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
621 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
622 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
623 6968, 6974, 6980, 6995, 7008, 7009, 7029
625 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
626 up at the same time. Implemented by Ulrich Drepper.
628 * TLS descriptors for LD and GD on x86 and x86-64.
629 Implemented by Alexandre Oliva.
631 * getaddrinfo now handles DCCP and UDPlite.
632 Implemented by Ulrich Drepper.
634 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
635 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
636 Implemented by Ulrich Drepper.
638 * New implementation of memmem, strstr, and strcasestr which is O(n).
639 Implemented by Eric Blake.
641 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
643 * Implement "e" option for popen to open file descriptor with the
644 close-on-exec flag set. Implemented by Ulrich Drepper.
646 * Implement "b" mode for fmemopen. In this mode writes writes don't
647 implicitly add a NUL byte and seeks from the end of the buffer really
648 use the buffer end, not the string length as the basis.
649 Implemented by Ulrich Drepper.
651 * Many functions, exported and internal, now atomically set the close-on-exec
652 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
654 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
656 Implemented by Pravin Satpute.
658 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
662 * The following bugs are resolved with this release:
664 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
665 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
666 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
667 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
668 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
669 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
670 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
672 * New locales: bo_CN, bo_IN, shs_CA.
674 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
676 * Sorting rules for some Indian languages (Devanagari and Gujarati).
677 Implemented by Pravin Satpute.
679 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
681 * nscd caches now all timeouts for DNS entries
682 Implemented by Ulrich Drepper.
684 * nscd is more efficient and wakes up less often.
685 Implemented by Ulrich Drepper.
687 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
688 vdprintf, and obstack_vprintf.
689 Implemented by Jakub Jelinek.
691 * Faster memset for x86-64.
692 Implemented by Harsha Jagasia and H.J. Lu.
694 * Faster memcpy on x86.
695 Implemented by Ulrich Drepper.
697 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
698 Implemented by Ulrich Drepper.
700 * Faster sqrt and sqrtf implemention for some PPC variants.
701 Implemented by Steven Munroe.
705 * The following bugs are resolved with this release:
707 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
708 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
709 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
710 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
711 5071, 5103, 5104, 5112, 5113, 5184, 5186
713 * More checking functions: fread, fread_unlocked, open*, mq_open.
714 Implemented by Jakub Jelinek and Ulrich Drepper.
716 * Extend fortification to C++. Implemented by Jakub Jelinek.
718 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
719 by not recognizing 'a' as a modifier when those specs are requested.
720 Implemented by Jakub Jelinek.
722 * PPC optimizations to math and string functions.
723 Implemented by Steven Munroe.
725 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
726 options to be passed. Implemented by Ulrich Drepper.
728 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
730 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
731 Implemented by Ulrich Drepper.
733 * Handle private futexes in the NPTL implementation.
734 Implemented by Jakub Jelinek and Ulrich Drepper.
736 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
737 Implemented by Roland McGrath and Ulrich Drepper.
739 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
741 * SHA-256 and SHA-512 based password encryption.
742 Implemented by Ulrich Drepper.
744 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
745 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
748 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
749 Implemented by Ulrich Drepper.
753 * The following bugs are resolved with this release:
755 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
756 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
757 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
758 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
759 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
760 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
761 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
764 * New Linux interfaces: epoll_pwait, sched_getcpu.
766 * New generic interfaces: strerror_l.
768 * nscd can now cache the services database. Implemented by Ulrich Drepper.
772 * The following bugs are resolved with this release:
774 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
775 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
776 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
777 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
778 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
779 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
780 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
781 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
782 3225, 3251, 3252, 3253, 3273
784 * For Linux, the sorting of addresses returned by getaddrinfo now also
785 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
786 Implemented by Ulrich Drepper.
788 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
789 Implemented by Ulrich Drepper.
791 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
793 * New iconv module for MIK. Contributed by Alexander Shopov.
795 * For sites with broken group and/or passwd database, the auto-propagate
796 option of nscd can prevent creating ID lookup entries from the results
797 of a name lookup and vice versa. This usually is no problem but some
798 site might have problems with the default behavior.
799 Implemented by Ulrich Drepper.
801 * Iterating over entire database in NIS can be slow. With the
802 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
803 to trade time for memory. The entire database will be read at once.
804 Implemented by Ulrich Drepper.
806 * The interfaces introduced in RFC 3542 have been implemented by
809 * Support for the new ELF hash table format was added by Ulrich Drepper.
811 * Support for priority inheritance mutexes added by Jakub Jelinek and
814 * Support for priority protected mutexes added by Jakub Jelinek.
816 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
817 or_IN, csb_PL, fy_NL, sr_ME.
821 * More overflow detection functions.
823 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
824 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
826 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
827 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
828 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
829 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
830 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
831 by Masahide Washizawa.
833 * It is now possible to install audit libraries for the dynamic linker using
834 LD_AUDIT. Implemented by Ulrich Drepper.
836 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
837 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
838 For a libc and libpthread that works well on Linux 2.4 kernels, we
839 recommend using the stable 2.3 branch.
841 * The new function open_wmemstream acts like open_memstream,
842 but uses a wchar_t wide character buffer.
844 * The new function ppoll is an improved version of poll, similar to pselect.
846 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
847 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
848 renameat, unlinkat, linkat, symlinkat, readlinkat.
850 * New Linux kernel system calls: unshare,
851 inotify_init, inotify_add_watch, inotify_rm_watch.
853 * The euidaccess function is now also known by the alias eaccess,
854 for compatibility with some other systems.
856 * Timezone data updated to 2006b version.
860 * The following bugs are resolved with this release:
862 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
863 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
864 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
865 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
866 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
867 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
869 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
871 * As of this release, GCC 4 can be used to compile the C Library.
873 * Timezone data updated to 2005m version.
877 * The following bugs are resolved with this release:
879 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
880 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
881 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
882 777, 787, 821, 822, 823, 825
884 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
888 * Support for RFC 3678. Real implementations exist only for Linux so far.
889 Implemented by Ulrich Drepper.
891 * nscd can now cache entries persistently. Expiring entries are reloaded.
892 For speedups the cache can be shared in memory with client processes.
893 Implemented by Ulrich Drepper.
895 * nscd can now perform SELinux checks.
896 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
898 * getaddrinfo queries are now cached. Canonical name lookup is performed
900 Implemented by Ulrich Drepper.
902 * The nothrow function attribute is used when headers are used by gcc when
903 compiling C code. This can avoid significant amounts of exception
906 * The malloc functions perform more error checking and are stricter when
907 it comes to reacting on errors. The default action is to terminate
908 the process after showing an error message. Implemented by Ulrich Drepper.
910 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
911 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
913 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
914 namespaces using the new function dlmopen(). This feature is of course,
915 like most other dynamic loading functionality, not available in statically
916 linked applications. Implemented by Ulrich Drepper.
918 * Low-overhead boundary checking variants of string and some stdio functions
919 were added. These are to be used in conjunction with a gcc patch by
920 Jakub Jelinek which adds calls to these functions if possible.
921 Implemented by Jakub Jelinek and Ulrich Drepper.
923 * Old code for several operating systems and machine architectures that
924 have not been in working condition in a long time have been removed from
925 the main source tree maintained by the GNU C Library's maintainers.
926 These files are now reside in the separate `ports' source module
927 that is usable as an add-on when building the library.
931 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
932 interrogate the dynamic linker, compatible with the Solaris interface.
934 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
935 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
937 * getifaddrs now uses the netlink interface on Linux to get its information.
938 Implemented by Thorsten Kukuk.
940 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
941 Implemented by Ulrich Drepper.
943 * support for non-executable stacks on x86 has been added. Changes mostly
946 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
949 * getaddrinfo now performs destination address selection according to
954 * Thread-safe interfaces for many functions that access locale data
955 were added in version 2.3, but these features were omitted from NEWS.
956 Many functions have variants with an `_l' suffix that take a `locale_t'
957 object as a parameter rather than consulting the current locale.
958 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
959 create and maintain `locale_t' objects. Additionally, the new function
960 `uselocale' sets "the current locale" (as used by functions not so
961 parameterized) set for an individual thread. These features were added
962 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
964 * The functions getresuid, getresgid, setresuid, and setresgid, which
965 have long been available on Linux, are now declared in <unistd.h>
966 and are now also available on the Hurd.
968 * ELF thread-local storage support (TLS) now works on x86-64.
970 * The new dynamic string token $LIB is expanded in shared library names.
971 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
973 * Aldy Hernandez contributed complete software floating point support for
974 PowerPC machines with no FPU.
976 * fexecve is implemented on Linux.
978 * The `btowc' function should work at least twice as fast due to
979 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
981 * With approriate thread add-ons cancelable functions are now implemented
982 in libc.so as well. No need to call the function in libpthread. This
983 change allowed to finally disable the incorrect and expensive handling
984 of weak definition in ld.so.
986 * Yet more PLT entries in libc.so have been removed. We finally arrived
987 at the bare minimum. Startup times improved appropriately.
989 * Support for the new Linux/x86 system call interface was added. The
990 AT_SYSINFO auxiliary vector entry is recognized and handled.
994 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
997 * iconv (the program and the interface) now accepts empty names (excluding
998 options like //TRANSLIT) to mean "use charset of current locale".
1000 * localedef can now transliterate characters in strings which are not in
1001 the provided charmap. The information from the input locale is used.
1003 * Prelinking support was added for ELF targets. This requires additional
1004 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1006 * Read-only stdio streams now use mmap to speed up operation by eliminating
1007 copying and buffer underflows. To use add 'm' to the mode string of
1008 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1010 * The malloc functions were completely rewritten by Wolfram Gloger based
1011 on Doug Lea's malloc-2.7.0.c.
1013 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1014 implementation of regex.
1016 * Bruno Haible upgraded the iconv and locale implementation to support
1019 * Contents of the LC_* and LANG environment variables in the CEN style are
1020 not recognized anymore. It never was used. Change by Ulrich Drepper.
1022 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1023 thread-local storage (TLS) ABI on some platforms.
1024 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1026 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1027 EUC-JISX0213, and TSCII.
1029 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1030 BSD-compatible interface for getting all network interface addresses.
1031 Implementation for IPv4 by Roland McGrath.
1033 * Loading of locale data is faster due to the introduction of a locale
1034 archive. Implemented by Roland McGrath and Ulrich Drepper.
1036 * Startup times are significantly reduced by not using exported functions
1037 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1040 * Steven Munroe contributed a port to PowerPC64/Linux.
1044 * The Hurd now uses the GNU libio implementation of stdio rather than the
1045 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1047 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1048 with the same behavior as the Linux system call of the same name.
1052 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1053 128-bit long double format.
1055 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1056 IBM1161, and IBM1162 charsets.
1058 * Andreas Jaeger contributed a port to x86-64/Linux.
1060 * Peter Bruin contributed a port to PowerPC/Hurd.
1062 * libc functions using I/O streams now can handle wide-oriented streams
1065 * optimizations in the dynamic linker. Binaries created by recent binutils
1066 versions start up quicker due to reduced time spent on relocations.
1068 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1072 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1073 asinh, atanh, j0 for the 128-bit long double format.
1075 * Bruno Haible updated all the code handling Unicode in some form to
1076 support Unicode 3.1.
1078 * Speed of regex for single-byte locales is back to previous levels.
1079 Patch by Isamu Hasegawa.
1081 * Alpha, SPARC, and IA-64 now also using floating stacks.
1083 * Startup time of internationalized applications greatly improved through
1084 iconv cache. Use iconvconfig to generate the cache file.
1085 Contributed by Ulrich Drepper.
1087 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1088 severe performance problems. Patch by David Mosberger.
1090 * The Hurd port got a lot more functionality like AIO, various stdio
1091 extensions, etc. Mainly done by Roland McGrath.
1093 * mtrace can now lookup symbols in shared libraries.
1097 * Intel's IA-64 math library is largely integrated. It provides fast and
1098 accurate implementatations for most basic and standard math functions
1099 in float, double, and long double format.
1101 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1102 and asin for the 96-bit long double format and asin, log, tan for the
1103 128-bit long double format.
1105 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1106 The basic double functions exist today. Contributed by Abraham Ziv
1107 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1108 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1110 * An asynchronous name lookup library was added. The interface is designed
1111 after POSIX AIO. The proposal was circulated beforehand to get comments.
1112 No negative ones came in. Implemented by Ulrich Drepper.
1114 * Port to S390/64bit contributed by Martin Schwidefsky
1115 <schwidefsky@de.ibm.com>.
1117 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1118 of functions for Linux/IA-64.
1120 * The RPC code is now thread safe. Threads can now use the same service
1121 of different services at the same time. Patch by Eric Norum
1122 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1124 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1125 family of functions for Linux/S390.
1127 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1128 of functions for Linux/x86.
1130 * Port to Linux/CRIS contributed by Axis Communications.
1134 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1135 we can now check for namespace violations and missing declarations. The
1136 result is that almost all headers are now Unix-compliant (as defined in
1137 the upcoming XPG6). The negative side is that some programs might need
1138 corrections, too, if they depend on the incorrect form of the headers in
1139 previous versions which defined too many symbols and included too many
1142 * regex now handles multibyte character sets correctly.
1143 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1145 * iconv (the program) does now conform to the upcoming XPG6 and handles
1146 charmaps. Instead of the charset names the path of charmaps can be
1147 provided and the conversion happens based on this data.
1148 Contributed by Ulrich Drepper.
1150 * The locale program now provides detailed information about the installed
1155 only lists the names of the supported locales
1159 provides details such as country, language, and codeset name.
1160 Contributed by Ulrich Drepper.
1164 * The gencat program now parses the input file according to the charset
1165 selected by the LC_CTYPE category. This is important for stateful
1166 character sets. To make generating catalogs easier there is a way
1167 to overwrite the charset selected by the locale: before the first
1168 message or $ quote line the catalog can contain a line like
1170 $ codeset=ISO-8859-2
1172 to select the charset (ISO-8859-2 in this case).
1174 Implemented by Shinya Hanataka and Ulrich Drepper.
1176 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1177 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1178 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1180 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1181 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1183 * The LANGUAGE environment variable is now ignored unless the locale is
1184 changed from the default "C" locale.
1186 * The usual bug fixes.
1190 * Greg McGary added runtime support for bounds checking using gcc's
1191 new -fbounded-pointers option. ix86 target is complete. PowerPC
1194 * Thorsten Kukuk added secure mode support to nscd.
1196 * The Berkeley db libraries have been removed.
1198 Related, the nss_db module is now in a separate package since it
1199 obviously requires a database library being available.
1201 * Wide character I/O streams implemented by Ulrich Drepper.
1203 * Functions from the extended socket API added by Ulrich Drepper.
1205 * Functions feenableexcept and fedisableexcept to control the
1206 behaviour of individual exceptions have been added by Andreas Jaeger.
1208 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1210 * The resolver code has been updated from bind 8.2.3-T5B which supports
1211 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1214 This change could in some situations effect backward compatibility. Since
1215 now `_res' is a thread-local instead of a global variable, modifying it
1216 in one thread does not have any effect in other threads.
1218 The resolver library was also extended to allow IPv6 as the transport
1219 protocol for the requests. This work was done by Stig Venaas.
1221 * Compatibility code for K&R C compilers has been removed from the
1222 header files. A ISO C compiler is needed to use the library
1223 (conforming to either C89 or C99 standard).
1225 * Complete rewrite of the localedef program to support multibyte character
1226 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1227 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1228 Implemented by Ulrich Drepper.
1230 Bruno Haible significantly improved the generation and use of the data
1231 structures for the wide character tables.
1233 * Plural handling in gettext implemented by Ulrich Drepper.
1235 * The utmp daemon has been removed.
1237 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1239 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1242 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1244 * POSIX barriers implemented by Kaz Kylheku.
1246 * POSIX spawn function family implemented by Ulrich Drepper.
1248 * POSIX spinlocks are now available.
1250 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1252 * the configure option --enable-kernel=X.Y.Z allows to strip out
1253 compatibility for kernel versions before X.Y.Z. This is currently only
1254 implemented for Linux.
1256 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1257 field sin6_scope_id. This means that all programs using IPv6 should be
1258 recompiled. Don't expect binary compatibility with previous glibc
1261 * various conversion modules for IBM character sets contributed by
1264 * IA-64 port by Jes Sorensen and HJ Lu.
1278 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1280 * New xdr functions are added; some rpc functions are now 64bit clean.
1282 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1284 * Fixed known incompatibilities with glibc 2.0.
1286 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1288 * Optimized a number of functions (especially the ELF dynamic loader).
1290 * Update timezone data files.
1292 * lots of charmaps corrections
1294 * some new locale definitions and charmaps
1299 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1300 conform to POSIX member type requirements. Symbol versions have been
1301 adjusted as needed within the library, and for direct use by applications,
1302 but there is potential for problems if third-party libraries use
1303 struct timeval as part of their interface. This does not present
1304 a problem for X and other "essential" system libraries.
1306 * An additional locale model to support C++ Standard Library locale
1307 model and probably more was implemented by Ulrich Drepper.
1309 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1312 * Miles Bader provided the `argp' function family to support hierachical
1313 command line argument parsing, layered on top of getopt.
1315 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1317 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1320 * scanf recognizes the %a and %A format for scanning floating point numbers.
1322 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1323 information and interfaces for the available integer types.
1325 * about 130 new math functions were added to implement the ISO C9x math
1328 * the new header <complex.h> contains definitions of the complex math
1329 functions from ISO C 9X.
1331 * the new header <tgmath.h> defines generic macros to use complex or
1332 real valued functions.
1334 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1336 * Andreas Jaeger provided a test suite for the math library.
1338 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1340 * Ulrich Drepper added character set conversion functions (iconv).
1342 * Optimized string functions have been added.
1344 * The localedata addon is now part of glibc.
1346 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1348 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1349 daemon for NSS (nscd).
1351 Missing a better place here are some numbers on improvements. Under
1352 Linux 2.1.125 un-tar-ing the kernel sources takes
1356 using local files 12.19s 6.88s 22.91s
1358 using NIS 13.92s 8.91s 26.34s
1360 using NIS & nscd 10.37s 7.34s 25.30s
1362 using NIS+ 27.57s 30.37s 640.46s
1364 using NIS+ & nscd 10.25s 7.83s 26.51s
1366 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1368 Keep in mind that non-namelookup related operations dominate above times.
1369 It was just a common complain that using NIS+ unpacking the kernel is
1372 [1] The old nscd implementation is not available anymore since it was
1373 distributed with glibc up to version 2.0.98 and thus is now replaced.
1375 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1377 * Mark Kettenis provided a Hesiod NSS module.
1379 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1380 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1382 * rcmd can now handle netgroups (Dick Streefland).
1384 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1387 * Support for the IPv6 protocol has been added to the socket API, as per the
1388 latest draft standards.
1390 * Support for Linux 2.2 has been added.
1392 * Interface changes relative to the latest 2.0.x release:
1393 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1394 addseverity NEW: Unix98
1395 alphasort64 NEW: LFS
1396 argp_err_exit_status NEW: argp, GNU ext
1397 argp_error NEW: argp, GNU ext
1398 argp_failure NEW: argp, GNU ext
1399 argp_help NEW: argp, GNU ext
1400 argp_parse NEW: argp, GNU ext
1401 argp_program_bug_address NEW: argp, GNU ext
1402 argp_program_version NEW: argp, GNU ext
1403 argp_program_version_hook NEW: argp, GNU ext
1404 argp_state_help NEW: argp, GNU ext
1405 argp_usage NEW: argp, GNU ext
1406 authdes_create NEW: Secure RPC
1407 authdes_getucred NEW: Secure RPC
1408 authdes_pk_create NEW: Secure RPC
1409 backtrace NEW: GNU ext.
1410 backtrace_symbols NEW: GNU ext.
1411 backtrace_symbols_fd NEW: GNU ext.
1413 cacosf NEW: ISO C 9x
1414 cacosh NEW: ISO C 9x
1415 cacoshf NEW: ISO C 9x
1416 cacoshl NEW: ISO C 9x
1417 cacosl NEW: ISO C 9x
1424 casinf NEW: ISO C 9x
1425 casinh NEW: ISO C 9x
1426 casinhf NEW: ISO C 9x
1427 casinhl NEW: ISO C 9x
1428 casinl NEW: ISO C 9x
1430 catanf NEW: ISO C 9x
1431 catanh NEW: ISO C 9x
1432 catanhf NEW: ISO C 9x
1433 catanhl NEW: ISO C 9x
1434 catanl NEW: ISO C 9x
1435 cbc_crypt NEW: Secure RPC
1439 ccoshf NEW: ISO C 9x
1440 ccoshl NEW: ISO C 9x
1446 cimagf NEW: ISO C 9x
1447 cimagl NEW: ISO C 9x
1448 clearerr_locked REMOVED
1449 clntunix_create NEW: sunrpc ext
1451 clog10 NEW: ISO C 9x
1452 clog10f NEW: ISO C 9x
1453 clog10l NEW: ISO C 9x
1463 cprojf NEW: ISO C 9x
1464 cprojl NEW: ISO C 9x
1466 crealf NEW: ISO C 9x
1467 creall NEW: ISO C 9x
1472 csinhf NEW: ISO C 9x
1473 csinhl NEW: ISO C 9x
1476 csqrtf NEW: ISO C 9x
1477 csqrtl NEW: ISO C 9x
1481 ctanhf NEW: ISO C 9x
1482 ctanhl NEW: ISO C 9x
1484 des_setparity NEW: Secure RPC
1485 ecb_crypt NEW: Secure RPC
1486 endutxent NEW: Unix98
1488 exp10f NEW: ISO C 9x
1489 exp10l NEW: ISO C 9x
1493 fattach NEW: STREAMS
1494 fdetach NEW: STREAMS
1498 feclearexcept NEW: ISO C 9x
1499 fegetenv NEW: ISO C 9x
1500 fegetexceptflag NEW: ISO C 9x
1501 fegetround NEW: ISO C 9x
1502 feholdexcept NEW: ISO C 9x
1504 feraiseexcept NEW: ISO C 9x
1505 ferror_locked REMOVED
1506 fesetenv NEW: ISO C 9x
1507 fesetexceptflag NEW: ISO C 9x
1508 fesetround NEW: ISO C 9x
1509 fetestexcept NEW: ISO C 9x
1510 feupdateenv NEW: ISO C 9x
1511 fflush_locked REMOVED
1515 fgets_unlocked NEW: GNU ext.
1516 fileno_locked REMOVED
1528 fputc_locked REMOVED
1529 fputs_unlocked NEW: GNU ext.
1530 fread_unlocked NEW: GNU ext.
1535 fstatvfs NEW: Unix98
1539 ftruncate64 NEW: LFS
1541 fwrite_unlocked NEW: GNU ext.
1542 gai_strerror NEW: IPv6
1546 getchar_locked REMOVED
1548 getdate_err NEW: Unix98
1549 getdate_r NEW: GNU ext.
1551 getnameinfo NEW: IPv6
1552 getnetname NEW: Secure RPC
1553 getpmsg NEW: STREAMS
1554 getpt NEW: Unix98 PTY
1555 getrlimit64 NEW: LFS
1556 getutxent NEW: Unix98
1557 getutxid NEW: Unix98
1558 getutxline NEW: Unix98
1559 glob64 NEW: GNU ext.
1560 globfree64 NEW: GNU ext.
1561 gnu_get_libc_release NEW: GNU ext.
1562 gnu_get_libc_version NEW: GNU ext.
1563 grantpt NEW: Unix98 PTY
1564 host2netname NEW: Secure RPC
1566 iconv_close NEW: iconv
1567 iconv_open NEW: iconv
1568 if_freenameindex NEW: IPv6
1569 if_indextoname NEW: IPv6
1570 if_nameindex NEW: IPv6
1571 if_nametoindex NEW: IPv6
1572 in6addr_any NEW: IPv6
1573 in6addr_loopback NEW: IPv6
1574 inet6_isipv4mapped NEW: IPv6
1575 isastream NEW: STREAMS
1576 iswblank NEW: GNU ext.
1577 key_decryptsession NEW: Secure RPC
1578 key_decryptsession_pk NEW: Secure RPC
1579 key_encryptsession NEW: Secure RPC
1580 key_encryptsession_pk NEW: Secure RPC
1581 key_gendes NEW: Secure RPC
1582 key_get_conv NEW: Secure RPC
1583 key_secretkey_is_set NEW: Secure RPC
1584 key_setnet NEW: Secure RPC
1585 key_setsecret NEW: Secure RPC
1586 llrint NEW: ISO C 9x
1587 llrintf NEW: ISO C 9x
1588 llrintl NEW: ISO C 9x
1589 llround NEW: ISO C 9x
1590 llroundf NEW: ISO C 9x
1591 llroundl NEW: ISO C 9x
1596 lrintf NEW: ISO C 9x
1597 lrintl NEW: ISO C 9x
1598 lround NEW: ISO C 9x
1599 lroundf NEW: ISO C 9x
1600 lroundl NEW: ISO C 9x
1602 makecontext NEW: Unix98
1603 mempcpy NEW: GNU ext.
1606 modify_ldt NEW: kernel
1610 nearbyint NEW: ISO C 9x
1611 nearbyintf NEW: ISO C 9x
1612 nearbyintl NEW: ISO C 9x
1613 netname2host NEW: Secure RPC
1614 netname2user NEW: Secure RPC
1615 nexttoward NEW: ISO C 9x
1616 nexttowardf NEW: ISO C 9x
1617 nexttowardl NEW: ISO C 9x
1621 passwd2des NEW: Secure RPC
1623 pow10f NEW: GNU ext.
1624 pow10l NEW: GNU ext.
1627 printf_size NEW: GNU ext.
1628 printf_size_info NEW: GNU ext.
1629 profil_counter REMOVED
1630 pthread_mutexattr_getkind_np REPLACED
1631 pthread_mutexattr_setkind_np REPLACED
1632 ptsname NEW: Unix98 PTY
1633 ptsname_r NEW: Unix98 PTY
1635 putchar_locked REMOVED
1636 putgrent NEW: GNU ext.
1638 putpmsg NEW: STREAMS
1639 pututxline NEW: Unix98
1643 readdir64_r NEW: LFS
1644 remquo NEW: ISO C 9x
1645 remquof NEW: ISO C 9x
1646 remquol NEW: ISO C 9x
1648 roundf NEW: ISO C 9x
1649 roundl NEW: ISO C 9x
1651 scalbln NEW: ISO C 9x
1652 scalblnf NEW: ISO C 9x
1653 scalblnl NEW: ISO C 9x
1655 sendfile NEW: kernel
1656 setcontext NEW: Unix98
1657 setrlimit64 NEW: LFS
1658 setutxent NEW: Unix98
1660 sigignore NEW: Unix98
1661 sigqueue NEW: POSIX.1b
1662 sigrelse NEW: Unix98
1663 sigset NEW: POSIX.1b
1664 sigtimedwait NEW: POSIX.1b
1665 sigwaitinfo NEW: POSIX.1b
1666 sincos NEW: GNU ext.
1667 sincosf NEW: GNU ext.
1668 sincosl NEW: GNU ext.
1672 strcasestr NEW: GNU ext.
1673 strtoimax NEW: ISO C 9x
1674 strtoumax NEW: ISO C 9x
1675 strverscmp NEW: GNU ext.
1676 svcauthdes_stats NEW: Secure RPC
1677 svcunix_create NEW: sunrpc etx
1678 svcunixfd_create NEW: sunrpc ext
1679 swapcontext NEW: Unix98
1680 tcgetsid NEW: Unix98 PTY
1681 tdestroy NEW: GNU ext.
1682 tgamma NEW: ISO C 9x
1683 tgammaf NEW: ISO C 9x
1684 tgammal NEW: ISO C 9x
1688 truncf NEW: ISO C 9x
1689 truncl NEW: ISO C 9x
1691 unlockpt NEW: Unix98 PTY
1692 updwtmpx NEW: Unix98
1693 user2netname NEW: Secure RPC
1694 utmpxname NEW: Unix98
1695 versionsort NEW: GNU ext.
1696 versionsort64 NEW: GNU ext.
1698 wcscasecmp NEW: GNU ext.
1699 wcsncasecmp NEW: GNU ext.
1700 wcsnlen NEW: GNU ext.
1701 wcstoimax NEW: ISO C 9x
1702 wcstoll NEW: ISO C 9x
1703 wcstoull NEW: ISO C 9x
1704 wcstoumax NEW: ISO C 9x
1706 wordexp NEW: POSIX.2
1707 wordfree NEW: POSIX.2
1708 write_profiling REMOVED
1709 xdecrypt NEW: Secure RPC
1710 xdr_authdes_cred NEW: Secure RPC
1711 xdr_authdes_verf NEW: Secure RPC
1712 xdr_cryptkeyarg NEW: Secure RPC
1713 xdr_cryptkeyarg2 NEW: Secure RPC
1714 xdr_cryptkeyres NEW: Secure RPC
1715 xdr_getcredres NEW: Secure RPC
1716 xdr_key_netstarg NEW: Secure RPC
1717 xdr_key_netstres NEW: Secure RPC
1718 xdr_keybuf NEW: Secure RPC
1719 xdr_keystatus NEW: Secure RPC
1720 xdr_netnamestr NEW: Secure RPC
1721 xdr_sizeof NEW: Secure RPC
1722 xdr_unixcred NEW: sunrpc ext
1723 xencrypt NEW: Secure RPC
1724 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1735 * inet_ntoa is thread-safe
1737 * updwtmp is moved from libutil to libc
1739 * rewrite of cbrt function
1741 * update of timezone data
1755 * add atoll function
1757 * fix complex problems in Berkeley DB code
1759 * fix math functions
1763 * fixed lots of header problems (especially Linux/GNU specific)
1765 * dynamic loader preserves all registers
1767 * Roland McGrath provided support for handling of auxiliary objects in
1768 the ELF dynamic loader.
1770 * support for parallel builds is improved
1774 * GNU extensions are no longer declared by default. To enable them you
1775 must define the macro `_GNU_SOURCE' in your program or compile with
1778 * The library has changed from using GNU ld symbol aliases to using weak
1779 symbols where available. The ELF object file format supports weak
1780 symbols; GNU ld also supports weak symbols in the a.out format. (There
1781 is also now support for other GNU ld extensions in ELF. Use the
1782 `--with-elf' option to configure to indicate you have ELF, and
1783 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1784 of many files which contained only symbol aliases, reducing the size of
1785 the source and the compiled library; many other files were renamed to
1786 less cryptic names previously occupied by the symbol alias files.
1787 There is a new header file <elf.h> for programs which operate on
1788 files in the ELF format.
1790 * Converted to Autoconf version 2, so `configure' has more options.
1791 Run `configure --help' to see the details.
1793 * The library can now be configured to build profiling, highly-optimized
1794 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1795 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1796 `configure' enable building these extra libraries. The shared library is
1797 built by default when using both ELF and GNU ld. When shared libraries
1798 are enabled, the new library `-ldl' is available for arbitrary run-time
1799 loading of shared objects; its interface is defined in <dlfcn.h>. The
1800 new header file <link.h> gives access to the internals of the run-time
1801 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1802 application of same name on other systems and it provides information
1803 about dynamically linked binaries.
1805 * The C library now provides the run-time support code for profiling
1806 executables compiled with `-pg'. Programs can control the profiling code
1807 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1808 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1809 the support for this file format was contributed by David Mosberger-Tang.
1811 * The math code has been replaced with a math library based on fdlibm from
1812 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1813 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1814 functions. The math functions now reside in a separate library, so
1815 programs using them will need to use `-lm' their linking commands.
1817 * John C. Bowman contributed optimized ix87 assembler inline functions.
1819 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1820 mechanism similar to that found in Solaris 2. This is now used for the
1821 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1822 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1823 file controls what services are used for each individual database. This
1824 works by loading shared libraries with names specified in `nsswitch.conf',
1825 so service modules can be changed or added at any time without even
1826 relinking any program. Currently there are the file, db, and NIS based
1827 NSS services available.
1829 * The new functions `strtoq' and `strtouq' parse integer values from
1830 strings, like `strtol' and `strtoul', but they return `long long int' and
1831 `unsigned long long int' values, respectively (64-bit quantities).
1833 * The new functions `strtof' and `strtold' parse floating-point values from
1834 strings, like `strtod', but they return `float' and `long double' values,
1835 respectively (on some machines `double' and `long double' are the same).
1837 * Ulrich Drepper has contributed new implementations of the floating-point
1838 printing and reading code used in the `printf' family of functions and
1839 `strtod', `strtof', and `strtold'. These new functions are perfectly
1840 accurate, and much faster than the old ones.
1842 * The implementation of the POSIX locale model was completely rewritten by
1843 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1844 to compile the POSIX locale definition.
1846 * The former dummy implementations of the strcoll and strxfrm function are
1847 now replaced by fully functional code contributed by Ulrich Drepper. The
1848 collation information comes from the POSIX locale definitions.
1850 * The new header <langinfo.h> defines an interface for accessing
1851 various locale-dependent data (using the locale chosen with `setlocale').
1853 * Ulrich Drepper has contributed a new suite of functions for operation on
1854 wide-character and multibyte-character strings, in <wchar.h>;
1855 and classification and case conversion of wide characters, in <wctype.h>.
1856 These new functions are conforming to the ISO C, Amendement 1 specification.
1858 * There is now a second implementation of the standard I/O library available.
1859 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1860 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1862 * You can now use positional parameter specifications in format strings
1863 for the `printf' and `scanf' families of functions. For example,
1864 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1865 ``Number 6, Mr Jones''. This is mainly useful when providing different
1866 format strings for different languages, whose grammars may dictate
1867 different orderings of the values being printed. To support this
1868 feature, the interface for `register_printf_handler' has changed; see
1869 the header file <printf.h> for details.
1871 * The `printf' and `scanf' families of functions now understand a new
1872 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1873 to group numbers as indicated by the locale; for `scanf' and friends, this
1874 says to accept as valid only a number with all the proper grouping
1875 separators in the right places. In the default "C" locale, numbers are
1876 not grouped; but locales for specific countries will define the usual
1877 conventions (i.e. separate thousands with `,' in the US locale).
1879 * The pgrp functions have been regularized, slightly incompatibly but much
1880 less confusingly. The core functions are now `getpgid' and `setpgid',
1881 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1882 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1883 provided for compatibility. There is no longer an incompatible `getpgrp'
1884 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1886 * The new header file <fts.h> and suite of functions simplify programs that
1887 operate on directory trees. This code comes from 4.4 BSD.
1889 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1890 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1891 NSS scheme used in glibc.
1893 * There is a new malloc debugging hook `__memalign_hook'.
1895 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1896 `unsigned int' in <sys/types.h>. These are for compatibility only and
1897 their use is discouraged.
1899 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1900 done differently, so that it works even without GNU ld.
1902 * New function `euidaccess' checks allowed access to a file like `access',
1903 but using the effective IDs instead of the real IDs.
1905 * The time zone data files have been updated for the latest and greatest
1906 local time conventions of the countries of the world.
1908 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1911 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1912 for formatting floating-point numbers. They are provided only for
1913 compatibility; new programs should use `sprintf' instead. There are
1914 also equivalent function for the `long double' floating-point type and
1915 all functions also exist in a reentrant form.
1917 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1918 functions for maintaining the login-record files (primarily of use to
1919 system programs such as `login'), and convenient functions for
1920 allocating and initializing a pseudo-terminal (pty) device.
1922 * Ulrich Drepper has contributed new support for System V style
1923 shared memory and IPC on systems that support it.
1925 * Ulrich Drepper has contributed several miscellaneous new functions found
1926 in System V: The `hsearch' family of functions provide an effective
1927 implementation of hash tables; `a64l' and `l64a' provide a very simple
1928 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1931 * Ulrich Drepper has contributed new reentrant counterparts for the
1932 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1934 * Ulrich Drepper has contributed new, highly-optimized versions of several
1935 string functions for the i486/Pentium family of processors.
1937 * Ulrich Drepper has updated the Linux-specific code, based largely
1938 on work done in Hongjiu Lu's version of GNU libc for Linux.
1939 The GNU library now supports Linux versions 2.0.10 and later,
1940 using the ELF object file format (i[3456]86-*-linux).
1942 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1944 * David Mosberger-Tang and Richard Henderson have ported the C library
1945 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1946 dynamic linking support for ELF/Alpha.
1948 * Richard Henderson contributed several Alpha optimized assembler function
1949 for arithmetic and string handling.
1951 * Ulrich Drepper has contributed a new set of message catalog functions to
1952 support multiple languages using the <libintl.h> interface, for use with
1953 his new package GNU gettext. Translation volunteers have contributed
1954 catalogs of the library's messages in Spanish, German, and Korean.
1956 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1957 program and the `catgets' function for reading the catalog files it
1958 creates. (The <libintl.h> interface is preferred; we include the
1959 <nl_types.h> interface using `catgets' only for source compatibility with
1960 programs already written to use it.)
1962 * New header file <values.h> gives SVID-compatible names for <limits.h>
1965 * Various new macros, declarations, and small header files for compatibility
1968 * New function `group_member' is a convenient way to check if a process has
1969 a given effective group ID.
1971 * When using GCC 2.7 and later, the socket functions are now declared in a
1972 special way so that passing an argument of type `struct sockaddr_in *',
1973 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1974 `struct sockaddr *' type, does not generate a type-clash warning.
1976 * New function `error' declared in header file <error.h> is a convenient
1977 function for printing error messages and optionally exiting; this is the
1978 canonical function used in GNU programs. The new functions `err', `warn',
1979 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1980 doing the same thing.
1982 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1983 POSIX.2 `glob' function to do ~ and {...} expansion.
1985 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1986 `clearenv' which is used in POSIX.9 is also available.
1988 * New function `getsid' returns session ID number on systems that support it.
1990 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1991 files <db.h> and <mpool.h> provide a rich set of functions for several
1992 types of simple databases stored in memory and in files, and <ndbm.h> is
1993 an old `ndbm'-compatible interface using the `db' functions. Link with
1994 `-ldb' to get these functions.
1996 * New macro `strdupa' copies a string like `strdup', but uses local stack
1997 space from `alloca' instead of dynamic heap space from `malloc'.
1999 * New function `strnlen' is like `strlen' but searches only a given maximum
2000 number of characters for the null terminator. `stpncpy', `strndup' and
2001 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2004 * New function `statfs' in header <sys/statfs.h>.
2006 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2007 provide convenient functions for operating on blocks of null-terminated
2010 * A new suite of functions in <utmp.h> handle all the details of reading
2011 and writing the utmp file.
2013 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2016 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2017 completely POSIX compliant and also implemented the extended functionality
2018 to handle alternate digit representation and alternate era date formats.
2020 * Ulrich Drepper provided an implementation of the `strptime' function
2021 defined in XPG4.2 which transforms a string into a `struct tm' value.
2023 * Paul Eggert provided the tzselect shell script as part of the timezone
2024 code. The shell script makes it easy to select the correct timezone
2027 * The implementation of the malloc family of functions is completely replaced
2028 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2029 The implementation uses the mmap function (if available) and it is
2030 optimized for the use in multi threaded programs.
2032 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2033 functions. This new functionality is usable by specifying a special
2034 salt string and it is compatible with implementation on *BSD systems.
2036 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2037 `getsubopt' to handle second level command line options, `bsd_signal'
2038 to access BSD style `signal' functionality, the obsolete `regexp' style
2041 * the `lchown' function is available on system which support this
2044 * The implementation of the shadow password handling function was contributed
2047 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2049 * POSIX.1g support was added. The <sys/select.h> header is available,
2050 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2051 implementation of `getaddrinfo'.
2055 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2057 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2058 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2060 * The new function `daemon' from 4.4 BSD is useful for server programs that
2061 want to put themselves in the background.
2063 * Joel Sherrill has contributed support for several standalone boards that
2064 run without an operating system.
2066 * `printf', `scanf' and friends now accept a `q' type modifier for long
2067 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2069 * All of the code taken from BSD (notably most of the math and networking
2070 routines) has been updated from the BSD 4.4-Lite release.
2072 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2074 * The new functions `getdomainname' and `setdomainname' fetch or change the
2075 YP/NIS domain name. These are system calls which exist on systems which
2078 * The time zone data files have been updated for the latest international
2081 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2082 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2086 * The C library now includes support for Sun RPC, from Sun's free
2087 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2088 are included. (There is still no support for YP.)
2090 * Tom Quinn has contributed a port of the C library to SGI machines running
2091 Irix 4 (mips-sgi-irix4).
2093 * The new `lockf' function is a simplified interface to the locking
2094 facilities of `fcntl', included for compatibility.
2096 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2098 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2100 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2103 * The error message printed by `assert' for a failed assertion now includes
2104 the name of the program (if using GNU ld) and the name of the calling
2105 function (with versions of GCC that support this).
2107 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2109 * The library now includes the <sys/mman.h> header file and memory
2110 management functions `mmap', `munmap', `mprotect', `msync', and
2111 `madvise', on systems that support those facilities.
2113 * The interface for `mcheck' has changed slightly: the function called to
2114 abort the program when an allocation inconsistency is detected now takes
2115 an argument that indicates the type of failure. The new function
2116 `mprobe' lets you request a consistency check for a particular block at
2117 any time (checks are normally done only when you call `free' or `realloc'
2120 * It is now possible to easily cross-compile the C library, building on one
2121 system a library to run on another machine and/or operating system. All
2122 you need to do is set the variable `HOST_CC' in `configparms' to the
2123 native compiler for programs to run on the machine you are building on (a
2124 few generator programs are used on Unix systems); set `CC' to the
2127 * The new function `fexecve' (only implemented on the GNU system) executes
2128 a program file given a file descriptor already open on the file.
2132 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2133 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2135 * You can set the variable `libprefix' in `configparms' to specify a prefix
2136 to be prepended to installed library files; this makes it easy to install
2137 the GNU C library to be linked as `-lgnuc' or whatever.
2139 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2140 copies a limited number of characters from a string, and returns the
2141 address of the last character written.
2143 * You no longer need to check for whether the installed `stddef.h' is
2144 compatible with the GNU C library. configure now checks for you.
2146 * You can now define a per-stream `fileno' function to convert the
2147 stream's cookie into an integral file descriptor.
2149 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2150 allocates zero bytes of storage, and returns a unique pointer which
2151 you can pass to `realloc' or `free'. The behavior is undefined if
2152 you dereference this pointer.
2154 * The C library now runs on Sony NEWS m68k machines running either
2155 NewsOS 3 or NewsOS 4.
2157 * The new `syscall' function is a system-dependent primitive function
2158 for invoking system calls. It has the canonical behavior on Unix
2159 systems, including unreliable return values for some calls (such as
2160 `pipe', `fork' and `getppid').
2162 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2163 to `EAGAIN', which is the preferred name. On systems whose kernels
2164 use two distinct codes, the C library now translates EWOULDBLOCK to
2165 EAGAIN in every system call function.
2169 * The GNU C Library Reference Manual is now distributed with the library.
2170 `make dvi' will produce a DVI file of the printed manual.
2171 `make info' will produce Info files that you can read on line using C-h i
2172 in Emacs or the `info' program.
2173 Please send comments on the manual to bug-glibc-manual@gnu.org.
2175 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2177 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2179 * Jason Merrill has contributed a port to the Sequent Symmetry running
2180 Dynix version 3 (i386-sequent-dynix).
2182 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2183 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2185 * New function `memory_warnings' lets you arrange to get warnings when
2186 malloc is running out of memory to allocate, like Emacs gives you.
2188 * The C library now contains the relocating allocator used in Emacs 19 for
2189 its editing buffers. This allocator (ralloc) minimizes allocation
2190 overhead and fragmentation by moving allocated regions around whenever it
2191 needs to. You always refer to a ralloc'd region with a "handle" (a
2192 pointer to a pointer--an object of type `void **').
2194 * There is a new `printf' format: `%m' gives you the string corresponding
2195 to the error code in `errno'.
2197 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2198 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2199 pass, the `a' modifier says to fill in a `char **' you pass with a
2202 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2203 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2204 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2206 * `mkstemp' is a traditional Unix function to atomically create and open a
2207 uniquely-named temporary file.
2211 * The standard location for the file that says what the local timezone is
2212 has changed again. It is now `/usr/local/etc/localtime' (or more
2213 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2215 * The distribution no longer contains any files with names longer than 14
2218 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2219 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2221 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2225 * The configuration process has changed quite a bit. The `configure'
2226 script is now used just like the configuration scripts for other GNU
2227 packages. The `sysdeps' directory hierarchy is much rearranged.
2228 The file `INSTALL' explains the new scheme in detail.
2230 * The header files no longer need to be processed into ANSI C and
2231 traditional C versions. There is just one set of files to install, and
2232 it will work with ANSI or old C compilers (including `gcc -traditional').
2234 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2235 MIPS DECStation running Ultrix 4.
2237 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2238 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2239 made itself into a shared library.
2241 * Yet further improved support for the i386, running 4.3 BSD-like systems
2242 (such as Mach 3 with the Unix single-server), or System V.
2244 * New function `strncasecmp' to do case-insensitive string comparison
2245 with limited length.
2247 * New function `strsep' is a reentrant alternative to `strtok'.
2249 * New functions `scandir' and `alphasort' for searching directories.
2251 * New function `setenv' is a better interface to `putenv'.
2253 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2254 function for traversing a directory tree.
2256 * The GNU obstack package is now also part of the C library.
2257 The new function `open_obstack_stream' creates a stdio stream that
2258 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2259 formatted output directly to an obstack.
2261 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2262 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2264 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2266 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2267 things to your strings.
2269 * There are some new test programs: test-fseek, testmb, and testrand.
2271 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2272 These ports are not finished, but are a good starting place for really
2273 supporting those systems.
2275 * `/etc/localtime' is now the standard location for the file that says what
2276 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2277 This follows the general principle that `/etc' is the place for all local
2278 configuration files.
2280 * The C library header files now use `extern "C"' when used by the C++
2281 compiler, so the C library should now work with C++ code.
2283 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2284 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2287 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2288 function which uses the `merge sort' algorithm, and is said to be
2289 significantly faster than the old GNU `qsort' function. Merge sort is
2290 now the standard `qsort' function. The new algorithm can require a lot
2291 of temporary storage; so, the old sorting function is called when the
2292 required storage is not available.
2294 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2295 provides the Unix `crypt' function, plus some other entry points.
2297 * The code and header files taken from 4.4 BSD have been updated with the
2298 latest files released from Berkeley.
2300 ----------------------------------------------------------------------
2301 Copyright information:
2303 Copyright (C) 1992-2013 Free Software Foundation, Inc.
2305 Permission is granted to anyone to make or distribute verbatim copies
2306 of this document as received, in any medium, provided that the
2307 copyright notice and this permission notice are preserved,
2308 thus giving the recipient permission to redistribute in turn.
2310 Permission is granted to distribute modified versions
2311 of this document, or of portions of it,
2312 under the above conditions, provided also that they
2313 carry prominent notices stating who last changed them.
2316 version-control: never
projects / platform / upstream / glibc.git / blob