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:
15 * The following bugs are resolved with this release:
17 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
18 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
19 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
20 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
21 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
22 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
23 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
24 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
25 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
26 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
27 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
28 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
29 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
32 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
33 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
34 Distributions can re-enable building and using pt_chown via the new configure
35 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
36 considerable security risks and should only be used if the distribution
37 understands and accepts the risks.
39 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
42 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
43 fixed (Bugzilla #15330).
45 * Add support for calling C++11 thread_local object destructors on thread
46 and program exit. This needs compiler support for offloading C++11
47 destructor calls to glibc.
49 * Improved worst case performance of libm functions with double inputs and
52 * Support for priority inherited mutexes in pthread condition variables on
53 non-x86 architectures.
55 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
57 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
59 * Optimized string functions for ARM. Implemented by Will Newton and
62 * Optimized libm functions for SPARC. Implemented by David S. Miller.
64 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
67 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
68 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
70 * Added a benchmark framework to track performance of functions in glibc.
72 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
73 It is based on draft TS 18661 and currently enabled as a GNU extension.
75 * On Linux, the clock function now uses the clock_gettime system call
76 for improved precision, rather than old times system call.
78 * Added new API functions pthread_getattr_default_np and
79 pthread_setattr_default_np to get and set the default pthread
80 attributes of a process.
82 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
83 This may improve lock scaling of existing programs on TSX capable systems.
84 When the --enable-lock-elision=yes parameter is specified at configure
85 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
88 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
89 availability). Implemented by Ryan S. Arnold.
91 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
95 * The following bugs are resolved with this release:
97 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
98 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
99 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
100 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
101 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
102 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
103 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
104 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
105 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
106 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
107 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
108 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
109 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
110 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
111 14879, 14889, 14893, 14898, 14914.
113 * Optimization of memcpy for MIPS.
115 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
116 EMFILE has been fixed (Bugzilla #14889).
118 * The add-on ports collection is now distributed in the "ports" subdirectory
119 of the main GNU C Library distribution, rather than separately.
121 * Port to ARM AArch64 contributed by Linaro.
123 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
124 Optimized versions of memcpy, memset, and memcmp added for System z10 and
126 Implemented by Andreas Krebbel.
128 * The new function secure_getenv allows secure access to the environment,
129 returning NULL if running in a SUID/SGID process. This function replaces
130 the internal function __secure_getenv.
132 * SystemTap static probes have been added into the dynamic linker.
133 Implemented by Gary Benson.
135 * Optimizations of string functions strstr, strcasestr and memmem.
136 Implemented by Maxim Kuvyrkov.
138 * The minimum Linux kernel version that this version of the GNU C Library
139 can be used with is 2.6.16.
141 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
142 powerpc POWER7. Implemented by Will Schmidt.
144 * New configure option --disable-nscd builds the C library such that it
145 never attempts to contact the Name Service Caching Daemon (nscd).
146 New configure option --disable-build-nscd avoids building nscd itself;
147 this is the default if --disable-nscd is used.
149 * Improved support for cross-compilation, including cross-testing and
150 bootstrap builds without a previously built glibc.
152 * Several testsuite tests are now able to test multiple IFUNC variants of an
153 interface, rather than just testing the one that would be chooen by
156 * New configure options --with-bugurl and --with-pkgversion, for
157 distributors to use to embed their bug-reporting and package version
158 information in --help and --version output.
160 * The ttyname and ttyname_r functions on Linux now fall back to searching for
161 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
162 allows creation of chroots without the procfs mounted on /proc.
164 * The `crypt' function now fails if passed salt bytes that violate the
165 specification for those values. On Linux, the `crypt' function will
166 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
167 enabled, and fail on encrypted strings using the MD5 or DES algorithm
168 when the mode is enabled.
170 * The `clock_*' suite of functions (declared in <time.h>) is now available
171 directly in the main C library. Previously it was necessary to link with
172 -lrt to use these functions. This change has the effect that a
173 single-threaded program that uses a function such as `clock_gettime' (and
174 is not linked with -lrt) will no longer implicitly load the pthreads
175 library at runtime and so will not suffer the overheads associated with
176 multi-thread support in other code such as the C++ runtime library.
178 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
183 * The following bugs are resolved with this release:
185 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
186 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
187 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
188 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
189 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
190 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
191 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
192 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
193 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
194 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
195 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
196 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
197 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
198 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
199 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
200 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
201 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
202 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
203 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
204 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
205 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
206 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
209 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
210 configuring glibc with:
211 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
212 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
213 Implemented by H.J. Lu.
217 + define static_assert
219 + do not declare gets
221 + declare at_quick_exit and quick_exit also for ISO C11
223 + aligned_alloc. NB: The code is deliberately allows the size parameter
224 to not be a multiple of the alignment. This is a moronic requirement
225 in the standard but it is only a requirement on the caller, not the
230 + uchar.h support added
232 + CMPLX, CMPLXF, CMPLXL added
234 Implemented by Ulrich Drepper.
236 * Support for the IA-64 has been moved to ports.
238 * Remove support for anything but ELF binary format
240 * Checking versions of poll, ppoll added.
241 Implemented by Ulrich Drepper.
243 * More generic and 64-bit performance optimizations to math functions.
244 Implemented by Ulrich Drepper.
246 * New configure option --enable-obsolete-rpc makes the deprecated RPC
247 headers and functions available at compile time as they were before
248 version 2.14. This option will be removed at some time in the future
249 after the TI-RPC library becomes fully sufficient for the needs of
250 existing applications.
252 * Compatibility code for Linux kernel versions before 2.4 has been removed.
253 Note that glibc is not expected to work with any Linux kernel version
256 * New header <sys/auxv.h> and function getauxval allowing easy access to
257 the AT_* key-value pairs passed from the Linux kernel. The header also
258 defines the HWCAP_* bits associated with the AT_HWCAP key.
260 * New locales: mag_IN
262 * New configure option --enable-systemtap builds SystemTap static probes
263 into libc for setjmp and longjmp and into libpthread for various operations.
264 So far the setjmp/longjmp probes and some of the libpthread probes are
265 provided only for i*86 and x86_64.
266 Implemented by Roland McGrath and Rayson Ho.
268 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
270 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
273 * More optimized functions for SPARC. Implemented by David S. Miller.
275 * Improved support for cross-compilation, especially bootstrap builds
276 without a previously built glibc.
278 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
279 Chris Metcalf from Tilera.
281 * Support for the old ARM ABI has been removed from ports. Only the EABI is
282 now supported for ARM processors.
284 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
285 as the name of the dynamic linker, to distinguish it from the
286 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
288 * Support for CRIS has been removed from ports.
290 * A new class of installed header has been documented for low-level
291 platform-specific functionality. PowerPC added the first instance with a
292 function to provide time base register access. Contributed by Tulio
293 Magno Quites Machado Filho.
295 * ix86 configurations now install header files that are consistent with
296 what x86-64 configurations install. These same header files can be used
297 for -m32, -m64, or -mx32 builds.
298 Contributed by H.J. Lu.
300 * Math library bug fixes. A thorough audit of all open math library bugs was
301 conducted by Joseph Myers. Significant progress was made on many math
302 library bugs resulting in more accurate exceptions and function results.
303 Many thanks to all those that contributed including Andreas Jaeger for his
304 patch review and work on the x87 trigonometric instruction issues.
306 * Timezone data is no longer installed. Timezone-related binaries and scripts
307 will continue to be installed. Users should obtain their timezone data from
308 their distribution provider or from the tzdata package at
309 <ftp://munnari.oz.au/pub/>.
313 * The following bugs are resolved with this release:
315 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
316 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
317 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
318 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
319 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
320 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
321 13484, 13506, 13515, 13523, 13524, 13538, 13540
323 * New program pldd to list loaded object of a process
324 Implemented by Ulrich Drepper.
326 * Add nss_db support back to glibc. No more dependency on Berkeley db
327 and support for initgroups lookups.
328 Implemented by Ulrich Drepper.
330 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
331 Contributed by HJ Lu.
333 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
334 Contributed by HJ Lu.
336 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
337 on x86-32 and x86-64.
338 Contributed by Liubov Dmitrieva.
340 * Optimized strchr and strrchr for SSE on x86-32.
341 Contributed by Liubov Dmitrieva.
343 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
344 for x86-64 and x86-32.
345 Contributed by Liubov Dmitrieva.
347 * New interfaces: scandirat, scandirat64
348 Implemented by Ulrich Drepper.
350 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
351 Implemented by Ulrich Drepper.
353 * nscd now also caches the netgroup database.
354 Implemented by Ulrich Drepper.
356 * Integrate libm with gcc's -ffinite-math-only option.
357 Implemented by Ulrich Drepper.
359 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
360 to math functions. Implemented by Ulrich Drepper.
362 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
363 Implemented by Ulrich Drepper.
365 * New Linux interfaces: process_vm_readv, process_vm_writev
367 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
368 Implemented by Ulrich Drepper.
370 * Optimized nearbyint and strcasecmp for PPC.
371 Implemented by Adhemerval Zanella.
373 * New locales: bho_IN, unm_US, es_CU, ta_LK
377 * The following bugs are resolved with this release:
379 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
380 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
381 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
382 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
383 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
384 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
385 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
386 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
387 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
388 12795, 12811, 12813, 12814, 12841
390 * The RPC implementation in libc is obsoleted. Old programs keep working
391 but new programs cannot be linked with the routines in libc anymore.
392 Programs in need of RPC functionality must be linked against TI-RPC.
393 The TI-RPC implementation is IPv6 enabled and there are other benefits.
395 Visible changes of this change include (obviously) the inability to link
396 programs using RPC functions without referencing the TI-RPC library and the
397 removal of the RPC headers from the glibc headers.
398 Implemented by Ulrich Drepper.
400 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
401 syncfs, setns, sendmmsg
403 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
404 yue_HK, lij_IT, mhr_RU
406 * New encodings: CP770, CP771, CP772, CP773, CP774
408 * New program sotruss to trace calls through PLTs
409 Implemented by Ulrich Drepper.
411 * The malloc hook implementation is marked deprecated and will be removed
412 from the default implementation in the next version. The design never
413 worked ever since the introduction of threads. Even programs which do
414 not create threads themselves can use multiple threads created internally.
418 * The following bugs are resolved with this release:
420 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
421 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
422 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
423 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
426 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
428 * POWER7 optimizations: memset, memcmp, strncmp
430 * New optimized string functions for x86-64: strnlen (SSE2),
431 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
432 Implemented by Ulrich Drepper.
436 * The following bugs are resolved with this release:
438 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
439 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
440 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
441 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
442 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
443 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
444 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
445 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
447 * New interfaces: pthread_getname_np, pthread_setname_np
449 * New Linux interface: recvmmsg
451 * STT_GNU_IFUNC implemented for Sparc by David Miller.
453 * The dynamic linker now recognizes supported ABI versions from the
454 EI_ABIVERSION field in the ELF header.
455 Implemented by Ulrich Drepper.
457 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
458 will not be used to fill in password fields in the passwd.byname replies.
459 Instead it is used to synthesize the shadow.byname table, should it be
460 missing. This is a useful mode in some installations involving Solaris.
461 Implemented by Ulrich Drepper.
463 * New locales: kok_IN, sq_MK, cv_RU
467 * The following bugs are resolved with this release:
469 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
470 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
471 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
472 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
473 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
474 10789, 10817, 10823, 10840, 10847
476 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
478 Implemented by Ulrich Drepper.
480 * Checking version of longjmp added that fails if an uninitialized stack
481 frame would be created. Implemented by Ulrich Drepper.
483 * STT_GNU_IFUNC is now supported in static executables.
484 Implemented by H.J. Lu.
486 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
488 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
489 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
490 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
491 Contributed by H.J. Lu.
493 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
494 Implemented by Ulrich Drepper.
496 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
498 Contributed by H.J. Lu.
500 * Support for fma instruction in AVX on x86-64.
501 Implemented by H.J. Lu and Ulrich Drepper.
503 * AVX support in x86-64 auditing support in ld.so.
504 Implemented by H.J. Lu.
506 * STB_GNU_UNIQUE support added.
507 Implemented by Ulrich Drepper.
509 * Implement second fallback mode for optimized DNS lookup for even more
510 broken environments. If two requests from the same port are not
511 handled correctly close the socket and open a new one before sending
512 the second request. The 'single-request-reopen' option in /etc/resolv.conf
513 can be used to select this mode right away, instead of rediscovering the
514 necessity is every process again.
515 Implemented by Ulrich Drepper.
517 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
518 Implemented by Adam Tkac.
520 * Optimized iconv conversions for S390x.
521 Implemented by Andreas Krebbel.
523 * Using condvars with PI mutexes is now more efficient due to kernel
524 support for requeueing to PI futexes. NPTL support added for x86-64.
525 Implemented by Ulrich Drepper.
527 * New locales: ps_AF, my_MM
531 * The following bugs are resolved with this release:
533 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
534 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
535 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
536 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
537 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
539 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
540 Implemented by Ulrich Drepper.
542 * New Linux interfaces: accept4, fallocate, fallocate64.
543 Implemented by Ulrich Drepper.
545 * Correct declarations of string function when used in C++ code. This
546 could lead to compile errors for invalid C++ code.
548 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
551 * New POSIX 2008 interface: psiginfo
552 Implemented by Ulrich Drepper.
554 * New ISO C++1x interfaces: quick_exit, at_quick_exit
555 Implemented by Ulrich Drepper.
557 * Support for selecting between multiple function definitions at runtime
558 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
560 * The libcrypt library can now use the hash function implementations in
561 NSS. Implemented by Ulrich Drepper.
563 * The malloc implementation can be compiled to be less memory efficient
564 but higher performing in multi-threaded programs.
565 Implemented by Ulrich Drepper.
567 * New locales: nan_TW@latin, ks_IN
569 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
570 Implemented by Ulrich Drepper.
572 * Extended printf hook support. It is possible to use user-defined types
573 and extend existing format specifiers.
574 Implemented by Ulrich Drepper.
576 * Handling for group shadow files has been added.
577 Implemented by Ulrich Drepper.
579 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
580 servers (the case, e.g., for some people using the built-in DNS
581 server in ADSL modems/routers). There is a once-per-process timeout
582 in case of a broken server. To avoid it, users can run nscd or put
583 'options single-request' in /etc/resolv.conf.
584 Implemented by Ulrich Drepper.
588 * The following bugs are resolved with this release:
590 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
591 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
592 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
593 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
594 6968, 6974, 6980, 6995, 7008, 7009, 7029
596 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
597 up at the same time. Implemented by Ulrich Drepper.
599 * TLS descriptors for LD and GD on x86 and x86-64.
600 Implemented by Alexandre Oliva.
602 * getaddrinfo now handles DCCP and UDPlite.
603 Implemented by Ulrich Drepper.
605 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
606 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
607 Implemented by Ulrich Drepper.
609 * New implementation of memmem, strstr, and strcasestr which is O(n).
610 Implemented by Eric Blake.
612 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
614 * Implement "e" option for popen to open file descriptor with the
615 close-on-exec flag set. Implemented by Ulrich Drepper.
617 * Implement "b" mode for fmemopen. In this mode writes writes don't
618 implicitly add a NUL byte and seeks from the end of the buffer really
619 use the buffer end, not the string length as the basis.
620 Implemented by Ulrich Drepper.
622 * Many functions, exported and internal, now atomically set the close-on-exec
623 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
625 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
627 Implemented by Pravin Satpute.
629 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
633 * The following bugs are resolved with this release:
635 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
636 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
637 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
638 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
639 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
640 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
641 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
643 * New locales: bo_CN, bo_IN, shs_CA.
645 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
647 * Sorting rules for some Indian languages (Devanagari and Gujarati).
648 Implemented by Pravin Satpute.
650 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
652 * nscd caches now all timeouts for DNS entries
653 Implemented by Ulrich Drepper.
655 * nscd is more efficient and wakes up less often.
656 Implemented by Ulrich Drepper.
658 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
659 vdprintf, and obstack_vprintf.
660 Implemented by Jakub Jelinek.
662 * Faster memset for x86-64.
663 Implemented by Harsha Jagasia and H.J. Lu.
665 * Faster memcpy on x86.
666 Implemented by Ulrich Drepper.
668 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
669 Implemented by Ulrich Drepper.
671 * Faster sqrt and sqrtf implemention for some PPC variants.
672 Implemented by Steven Munroe.
676 * The following bugs are resolved with this release:
678 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
679 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
680 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
681 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
682 5071, 5103, 5104, 5112, 5113, 5184, 5186
684 * More checking functions: fread, fread_unlocked, open*, mq_open.
685 Implemented by Jakub Jelinek and Ulrich Drepper.
687 * Extend fortification to C++. Implemented by Jakub Jelinek.
689 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
690 by not recognizing 'a' as a modifier when those specs are requested.
691 Implemented by Jakub Jelinek.
693 * PPC optimizations to math and string functions.
694 Implemented by Steven Munroe.
696 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
697 options to be passed. Implemented by Ulrich Drepper.
699 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
701 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
702 Implemented by Ulrich Drepper.
704 * Handle private futexes in the NPTL implementation.
705 Implemented by Jakub Jelinek and Ulrich Drepper.
707 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
708 Implemented by Roland McGrath and Ulrich Drepper.
710 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
712 * SHA-256 and SHA-512 based password encryption.
713 Implemented by Ulrich Drepper.
715 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
716 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
719 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
720 Implemented by Ulrich Drepper.
724 * The following bugs are resolved with this release:
726 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
727 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
728 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
729 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
730 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
731 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
732 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
735 * New Linux interfaces: epoll_pwait, sched_getcpu.
737 * New generic interfaces: strerror_l.
739 * nscd can now cache the services database. Implemented by Ulrich Drepper.
743 * The following bugs are resolved with this release:
745 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
746 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
747 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
748 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
749 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
750 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
751 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
752 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
753 3225, 3251, 3252, 3253, 3273
755 * For Linux, the sorting of addresses returned by getaddrinfo now also
756 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
757 Implemented by Ulrich Drepper.
759 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
760 Implemented by Ulrich Drepper.
762 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
764 * New iconv module for MIK. Contributed by Alexander Shopov.
766 * For sites with broken group and/or passwd database, the auto-propagate
767 option of nscd can prevent creating ID lookup entries from the results
768 of a name lookup and vice versa. This usually is no problem but some
769 site might have problems with the default behavior.
770 Implemented by Ulrich Drepper.
772 * Iterating over entire database in NIS can be slow. With the
773 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
774 to trade time for memory. The entire database will be read at once.
775 Implemented by Ulrich Drepper.
777 * The interfaces introduced in RFC 3542 have been implemented by
780 * Support for the new ELF hash table format was added by Ulrich Drepper.
782 * Support for priority inheritance mutexes added by Jakub Jelinek and
785 * Support for priority protected mutexes added by Jakub Jelinek.
787 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
788 or_IN, csb_PL, fy_NL, sr_ME.
792 * More overflow detection functions.
794 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
795 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
797 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
798 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
799 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
800 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
801 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
802 by Masahide Washizawa.
804 * It is now possible to install audit libraries for the dynamic linker using
805 LD_AUDIT. Implemented by Ulrich Drepper.
807 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
808 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
809 For a libc and libpthread that works well on Linux 2.4 kernels, we
810 recommend using the stable 2.3 branch.
812 * The new function open_wmemstream acts like open_memstream,
813 but uses a wchar_t wide character buffer.
815 * The new function ppoll is an improved version of poll, similar to pselect.
817 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
818 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
819 renameat, unlinkat, linkat, symlinkat, readlinkat.
821 * New Linux kernel system calls: unshare,
822 inotify_init, inotify_add_watch, inotify_rm_watch.
824 * The euidaccess function is now also known by the alias eaccess,
825 for compatibility with some other systems.
827 * Timezone data updated to 2006b version.
831 * The following bugs are resolved with this release:
833 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
834 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
835 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
836 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
837 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
838 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
840 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
842 * As of this release, GCC 4 can be used to compile the C Library.
844 * Timezone data updated to 2005m version.
848 * The following bugs are resolved with this release:
850 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
851 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
852 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
853 777, 787, 821, 822, 823, 825
855 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
859 * Support for RFC 3678. Real implementations exist only for Linux so far.
860 Implemented by Ulrich Drepper.
862 * nscd can now cache entries persistently. Expiring entries are reloaded.
863 For speedups the cache can be shared in memory with client processes.
864 Implemented by Ulrich Drepper.
866 * nscd can now perform SELinux checks.
867 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
869 * getaddrinfo queries are now cached. Canonical name lookup is performed
871 Implemented by Ulrich Drepper.
873 * The nothrow function attribute is used when headers are used by gcc when
874 compiling C code. This can avoid significant amounts of exception
877 * The malloc functions perform more error checking and are stricter when
878 it comes to reacting on errors. The default action is to terminate
879 the process after showing an error message. Implemented by Ulrich Drepper.
881 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
882 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
884 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
885 namespaces using the new function dlmopen(). This feature is of course,
886 like most other dynamic loading functionality, not available in statically
887 linked applications. Implemented by Ulrich Drepper.
889 * Low-overhead boundary checking variants of string and some stdio functions
890 were added. These are to be used in conjunction with a gcc patch by
891 Jakub Jelinek which adds calls to these functions if possible.
892 Implemented by Jakub Jelinek and Ulrich Drepper.
894 * Old code for several operating systems and machine architectures that
895 have not been in working condition in a long time have been removed from
896 the main source tree maintained by the GNU C Library's maintainers.
897 These files are now reside in the separate `ports' source module
898 that is usable as an add-on when building the library.
902 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
903 interrogate the dynamic linker, compatible with the Solaris interface.
905 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
906 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
908 * getifaddrs now uses the netlink interface on Linux to get its information.
909 Implemented by Thorsten Kukuk.
911 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
912 Implemented by Ulrich Drepper.
914 * support for non-executable stacks on x86 has been added. Changes mostly
917 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
920 * getaddrinfo now performs destination address selection according to
925 * Thread-safe interfaces for many functions that access locale data
926 were added in version 2.3, but these features were omitted from NEWS.
927 Many functions have variants with an `_l' suffix that take a `locale_t'
928 object as a parameter rather than consulting the current locale.
929 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
930 create and maintain `locale_t' objects. Additionally, the new function
931 `uselocale' sets "the current locale" (as used by functions not so
932 parameterized) set for an individual thread. These features were added
933 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
935 * The functions getresuid, getresgid, setresuid, and setresgid, which
936 have long been available on Linux, are now declared in <unistd.h>
937 and are now also available on the Hurd.
939 * ELF thread-local storage support (TLS) now works on x86-64.
941 * The new dynamic string token $LIB is expanded in shared library names.
942 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
944 * Aldy Hernandez contributed complete software floating point support for
945 PowerPC machines with no FPU.
947 * fexecve is implemented on Linux.
949 * The `btowc' function should work at least twice as fast due to
950 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
952 * With approriate thread add-ons cancelable functions are now implemented
953 in libc.so as well. No need to call the function in libpthread. This
954 change allowed to finally disable the incorrect and expensive handling
955 of weak definition in ld.so.
957 * Yet more PLT entries in libc.so have been removed. We finally arrived
958 at the bare minimum. Startup times improved appropriately.
960 * Support for the new Linux/x86 system call interface was added. The
961 AT_SYSINFO auxiliary vector entry is recognized and handled.
965 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
968 * iconv (the program and the interface) now accepts empty names (excluding
969 options like //TRANSLIT) to mean "use charset of current locale".
971 * localedef can now transliterate characters in strings which are not in
972 the provided charmap. The information from the input locale is used.
974 * Prelinking support was added for ELF targets. This requires additional
975 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
977 * Read-only stdio streams now use mmap to speed up operation by eliminating
978 copying and buffer underflows. To use add 'm' to the mode string of
979 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
981 * The malloc functions were completely rewritten by Wolfram Gloger based
982 on Doug Lea's malloc-2.7.0.c.
984 * Isamu Hasegawa contributed a completely new and POSIX-conformant
985 implementation of regex.
987 * Bruno Haible upgraded the iconv and locale implementation to support
990 * Contents of the LC_* and LANG environment variables in the CEN style are
991 not recognized anymore. It never was used. Change by Ulrich Drepper.
993 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
994 thread-local storage (TLS) ABI on some platforms.
995 Changes by Ulrich Drepper. SH support by Kaz Kojima.
997 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
998 EUC-JISX0213, and TSCII.
1000 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1001 BSD-compatible interface for getting all network interface addresses.
1002 Implementation for IPv4 by Roland McGrath.
1004 * Loading of locale data is faster due to the introduction of a locale
1005 archive. Implemented by Roland McGrath and Ulrich Drepper.
1007 * Startup times are significantly reduced by not using exported functions
1008 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1011 * Steven Munroe contributed a port to PowerPC64/Linux.
1015 * The Hurd now uses the GNU libio implementation of stdio rather than the
1016 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1018 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1019 with the same behavior as the Linux system call of the same name.
1023 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1024 128-bit long double format.
1026 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1027 IBM1161, and IBM1162 charsets.
1029 * Andreas Jaeger contributed a port to x86-64/Linux.
1031 * Peter Bruin contributed a port to PowerPC/Hurd.
1033 * libc functions using I/O streams now can handle wide-oriented streams
1036 * optimizations in the dynamic linker. Binaries created by recent binutils
1037 versions start up quicker due to reduced time spent on relocations.
1039 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1043 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1044 asinh, atanh, j0 for the 128-bit long double format.
1046 * Bruno Haible updated all the code handling Unicode in some form to
1047 support Unicode 3.1.
1049 * Speed of regex for single-byte locales is back to previous levels.
1050 Patch by Isamu Hasegawa.
1052 * Alpha, SPARC, and IA-64 now also using floating stacks.
1054 * Startup time of internationalized applications greatly improved through
1055 iconv cache. Use iconvconfig to generate the cache file.
1056 Contributed by Ulrich Drepper.
1058 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1059 severe performance problems. Patch by David Mosberger.
1061 * The Hurd port got a lot more functionality like AIO, various stdio
1062 extensions, etc. Mainly done by Roland McGrath.
1064 * mtrace can now lookup symbols in shared libraries.
1068 * Intel's IA-64 math library is largely integrated. It provides fast and
1069 accurate implementatations for most basic and standard math functions
1070 in float, double, and long double format.
1072 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1073 and asin for the 96-bit long double format and asin, log, tan for the
1074 128-bit long double format.
1076 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1077 The basic double functions exist today. Contributed by Abraham Ziv
1078 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1079 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1081 * An asynchronous name lookup library was added. The interface is designed
1082 after POSIX AIO. The proposal was circulated beforehand to get comments.
1083 No negative ones came in. Implemented by Ulrich Drepper.
1085 * Port to S390/64bit contributed by Martin Schwidefsky
1086 <schwidefsky@de.ibm.com>.
1088 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1089 of functions for Linux/IA-64.
1091 * The RPC code is now thread safe. Threads can now use the same service
1092 of different services at the same time. Patch by Eric Norum
1093 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1095 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1096 family of functions for Linux/S390.
1098 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1099 of functions for Linux/x86.
1101 * Port to Linux/CRIS contributed by Axis Communications.
1105 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1106 we can now check for namespace violations and missing declarations. The
1107 result is that almost all headers are now Unix-compliant (as defined in
1108 the upcoming XPG6). The negative side is that some programs might need
1109 corrections, too, if they depend on the incorrect form of the headers in
1110 previous versions which defined too many symbols and included too many
1113 * regex now handles multibyte character sets correctly.
1114 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1116 * iconv (the program) does now conform to the upcoming XPG6 and handles
1117 charmaps. Instead of the charset names the path of charmaps can be
1118 provided and the conversion happens based on this data.
1119 Contributed by Ulrich Drepper.
1121 * The locale program now provides detailed information about the installed
1126 only lists the names of the supported locales
1130 provides details such as country, language, and codeset name.
1131 Contributed by Ulrich Drepper.
1135 * The gencat program now parses the input file according to the charset
1136 selected by the LC_CTYPE category. This is important for stateful
1137 character sets. To make generating catalogs easier there is a way
1138 to overwrite the charset selected by the locale: before the first
1139 message or $ quote line the catalog can contain a line like
1141 $ codeset=ISO-8859-2
1143 to select the charset (ISO-8859-2 in this case).
1145 Implemented by Shinya Hanataka and Ulrich Drepper.
1147 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1148 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1149 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1151 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1152 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1154 * The LANGUAGE environment variable is now ignored unless the locale is
1155 changed from the default "C" locale.
1157 * The usual bug fixes.
1161 * Greg McGary added runtime support for bounds checking using gcc's
1162 new -fbounded-pointers option. ix86 target is complete. PowerPC
1165 * Thorsten Kukuk added secure mode support to nscd.
1167 * The Berkeley db libraries have been removed.
1169 Related, the nss_db module is now in a separate package since it
1170 obviously requires a database library being available.
1172 * Wide character I/O streams implemented by Ulrich Drepper.
1174 * Functions from the extended socket API added by Ulrich Drepper.
1176 * Functions feenableexcept and fedisableexcept to control the
1177 behaviour of individual exceptions have been added by Andreas Jaeger.
1179 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1181 * The resolver code has been updated from bind 8.2.3-T5B which supports
1182 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1185 This change could in some situations effect backward compatibility. Since
1186 now `_res' is a thread-local instead of a global variable, modifying it
1187 in one thread does not have any effect in other threads.
1189 The resolver library was also extended to allow IPv6 as the transport
1190 protocol for the requests. This work was done by Stig Venaas.
1192 * Compatibility code for K&R C compilers has been removed from the
1193 header files. A ISO C compiler is needed to use the library
1194 (conforming to either C89 or C99 standard).
1196 * Complete rewrite of the localedef program to support multibyte character
1197 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1198 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1199 Implemented by Ulrich Drepper.
1201 Bruno Haible significantly improved the generation and use of the data
1202 structures for the wide character tables.
1204 * Plural handling in gettext implemented by Ulrich Drepper.
1206 * The utmp daemon has been removed.
1208 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1210 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1213 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1215 * POSIX barriers implemented by Kaz Kylheku.
1217 * POSIX spawn function family implemented by Ulrich Drepper.
1219 * POSIX spinlocks are now available.
1221 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1223 * the configure option --enable-kernel=X.Y.Z allows to strip out
1224 compatibility for kernel versions before X.Y.Z. This is currently only
1225 implemented for Linux.
1227 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1228 field sin6_scope_id. This means that all programs using IPv6 should be
1229 recompiled. Don't expect binary compatibility with previous glibc
1232 * various conversion modules for IBM character sets contributed by
1235 * IA-64 port by Jes Sorensen and HJ Lu.
1249 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1251 * New xdr functions are added; some rpc functions are now 64bit clean.
1253 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1255 * Fixed known incompatibilities with glibc 2.0.
1257 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1259 * Optimized a number of functions (especially the ELF dynamic loader).
1261 * Update timezone data files.
1263 * lots of charmaps corrections
1265 * some new locale definitions and charmaps
1270 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1271 conform to POSIX member type requirements. Symbol versions have been
1272 adjusted as needed within the library, and for direct use by applications,
1273 but there is potential for problems if third-party libraries use
1274 struct timeval as part of their interface. This does not present
1275 a problem for X and other "essential" system libraries.
1277 * An additional locale model to support C++ Standard Library locale
1278 model and probably more was implemented by Ulrich Drepper.
1280 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1283 * Miles Bader provided the `argp' function family to support hierachical
1284 command line argument parsing, layered on top of getopt.
1286 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1288 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1291 * scanf recognizes the %a and %A format for scanning floating point numbers.
1293 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1294 information and interfaces for the available integer types.
1296 * about 130 new math functions were added to implement the ISO C9x math
1299 * the new header <complex.h> contains definitions of the complex math
1300 functions from ISO C 9X.
1302 * the new header <tgmath.h> defines generic macros to use complex or
1303 real valued functions.
1305 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1307 * Andreas Jaeger provided a test suite for the math library.
1309 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1311 * Ulrich Drepper added character set conversion functions (iconv).
1313 * Optimized string functions have been added.
1315 * The localedata addon is now part of glibc.
1317 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1319 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1320 daemon for NSS (nscd).
1322 Missing a better place here are some numbers on improvements. Under
1323 Linux 2.1.125 un-tar-ing the kernel sources takes
1327 using local files 12.19s 6.88s 22.91s
1329 using NIS 13.92s 8.91s 26.34s
1331 using NIS & nscd 10.37s 7.34s 25.30s
1333 using NIS+ 27.57s 30.37s 640.46s
1335 using NIS+ & nscd 10.25s 7.83s 26.51s
1337 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1339 Keep in mind that non-namelookup related operations dominate above times.
1340 It was just a common complain that using NIS+ unpacking the kernel is
1343 [1] The old nscd implementation is not available anymore since it was
1344 distributed with glibc up to version 2.0.98 and thus is now replaced.
1346 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1348 * Mark Kettenis provided a Hesiod NSS module.
1350 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1351 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1353 * rcmd can now handle netgroups (Dick Streefland).
1355 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1358 * Support for the IPv6 protocol has been added to the socket API, as per the
1359 latest draft standards.
1361 * Support for Linux 2.2 has been added.
1363 * Interface changes relative to the latest 2.0.x release:
1364 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1365 addseverity NEW: Unix98
1366 alphasort64 NEW: LFS
1367 argp_err_exit_status NEW: argp, GNU ext
1368 argp_error NEW: argp, GNU ext
1369 argp_failure NEW: argp, GNU ext
1370 argp_help NEW: argp, GNU ext
1371 argp_parse NEW: argp, GNU ext
1372 argp_program_bug_address NEW: argp, GNU ext
1373 argp_program_version NEW: argp, GNU ext
1374 argp_program_version_hook NEW: argp, GNU ext
1375 argp_state_help NEW: argp, GNU ext
1376 argp_usage NEW: argp, GNU ext
1377 authdes_create NEW: Secure RPC
1378 authdes_getucred NEW: Secure RPC
1379 authdes_pk_create NEW: Secure RPC
1380 backtrace NEW: GNU ext.
1381 backtrace_symbols NEW: GNU ext.
1382 backtrace_symbols_fd NEW: GNU ext.
1384 cacosf NEW: ISO C 9x
1385 cacosh NEW: ISO C 9x
1386 cacoshf NEW: ISO C 9x
1387 cacoshl NEW: ISO C 9x
1388 cacosl NEW: ISO C 9x
1395 casinf NEW: ISO C 9x
1396 casinh NEW: ISO C 9x
1397 casinhf NEW: ISO C 9x
1398 casinhl NEW: ISO C 9x
1399 casinl NEW: ISO C 9x
1401 catanf NEW: ISO C 9x
1402 catanh NEW: ISO C 9x
1403 catanhf NEW: ISO C 9x
1404 catanhl NEW: ISO C 9x
1405 catanl NEW: ISO C 9x
1406 cbc_crypt NEW: Secure RPC
1410 ccoshf NEW: ISO C 9x
1411 ccoshl NEW: ISO C 9x
1417 cimagf NEW: ISO C 9x
1418 cimagl NEW: ISO C 9x
1419 clearerr_locked REMOVED
1420 clntunix_create NEW: sunrpc ext
1422 clog10 NEW: ISO C 9x
1423 clog10f NEW: ISO C 9x
1424 clog10l NEW: ISO C 9x
1434 cprojf NEW: ISO C 9x
1435 cprojl NEW: ISO C 9x
1437 crealf NEW: ISO C 9x
1438 creall NEW: ISO C 9x
1443 csinhf NEW: ISO C 9x
1444 csinhl NEW: ISO C 9x
1447 csqrtf NEW: ISO C 9x
1448 csqrtl NEW: ISO C 9x
1452 ctanhf NEW: ISO C 9x
1453 ctanhl NEW: ISO C 9x
1455 des_setparity NEW: Secure RPC
1456 ecb_crypt NEW: Secure RPC
1457 endutxent NEW: Unix98
1459 exp10f NEW: ISO C 9x
1460 exp10l NEW: ISO C 9x
1464 fattach NEW: STREAMS
1465 fdetach NEW: STREAMS
1469 feclearexcept NEW: ISO C 9x
1470 fegetenv NEW: ISO C 9x
1471 fegetexceptflag NEW: ISO C 9x
1472 fegetround NEW: ISO C 9x
1473 feholdexcept NEW: ISO C 9x
1475 feraiseexcept NEW: ISO C 9x
1476 ferror_locked REMOVED
1477 fesetenv NEW: ISO C 9x
1478 fesetexceptflag NEW: ISO C 9x
1479 fesetround NEW: ISO C 9x
1480 fetestexcept NEW: ISO C 9x
1481 feupdateenv NEW: ISO C 9x
1482 fflush_locked REMOVED
1486 fgets_unlocked NEW: GNU ext.
1487 fileno_locked REMOVED
1499 fputc_locked REMOVED
1500 fputs_unlocked NEW: GNU ext.
1501 fread_unlocked NEW: GNU ext.
1506 fstatvfs NEW: Unix98
1510 ftruncate64 NEW: LFS
1512 fwrite_unlocked NEW: GNU ext.
1513 gai_strerror NEW: IPv6
1517 getchar_locked REMOVED
1519 getdate_err NEW: Unix98
1520 getdate_r NEW: GNU ext.
1522 getnameinfo NEW: IPv6
1523 getnetname NEW: Secure RPC
1524 getpmsg NEW: STREAMS
1525 getpt NEW: Unix98 PTY
1526 getrlimit64 NEW: LFS
1527 getutxent NEW: Unix98
1528 getutxid NEW: Unix98
1529 getutxline NEW: Unix98
1530 glob64 NEW: GNU ext.
1531 globfree64 NEW: GNU ext.
1532 gnu_get_libc_release NEW: GNU ext.
1533 gnu_get_libc_version NEW: GNU ext.
1534 grantpt NEW: Unix98 PTY
1535 host2netname NEW: Secure RPC
1537 iconv_close NEW: iconv
1538 iconv_open NEW: iconv
1539 if_freenameindex NEW: IPv6
1540 if_indextoname NEW: IPv6
1541 if_nameindex NEW: IPv6
1542 if_nametoindex NEW: IPv6
1543 in6addr_any NEW: IPv6
1544 in6addr_loopback NEW: IPv6
1545 inet6_isipv4mapped NEW: IPv6
1546 isastream NEW: STREAMS
1547 iswblank NEW: GNU ext.
1548 key_decryptsession NEW: Secure RPC
1549 key_decryptsession_pk NEW: Secure RPC
1550 key_encryptsession NEW: Secure RPC
1551 key_encryptsession_pk NEW: Secure RPC
1552 key_gendes NEW: Secure RPC
1553 key_get_conv NEW: Secure RPC
1554 key_secretkey_is_set NEW: Secure RPC
1555 key_setnet NEW: Secure RPC
1556 key_setsecret NEW: Secure RPC
1557 llrint NEW: ISO C 9x
1558 llrintf NEW: ISO C 9x
1559 llrintl NEW: ISO C 9x
1560 llround NEW: ISO C 9x
1561 llroundf NEW: ISO C 9x
1562 llroundl NEW: ISO C 9x
1567 lrintf NEW: ISO C 9x
1568 lrintl NEW: ISO C 9x
1569 lround NEW: ISO C 9x
1570 lroundf NEW: ISO C 9x
1571 lroundl NEW: ISO C 9x
1573 makecontext NEW: Unix98
1574 mempcpy NEW: GNU ext.
1577 modify_ldt NEW: kernel
1581 nearbyint NEW: ISO C 9x
1582 nearbyintf NEW: ISO C 9x
1583 nearbyintl NEW: ISO C 9x
1584 netname2host NEW: Secure RPC
1585 netname2user NEW: Secure RPC
1586 nexttoward NEW: ISO C 9x
1587 nexttowardf NEW: ISO C 9x
1588 nexttowardl NEW: ISO C 9x
1592 passwd2des NEW: Secure RPC
1594 pow10f NEW: GNU ext.
1595 pow10l NEW: GNU ext.
1598 printf_size NEW: GNU ext.
1599 printf_size_info NEW: GNU ext.
1600 profil_counter REMOVED
1601 pthread_mutexattr_getkind_np REPLACED
1602 pthread_mutexattr_setkind_np REPLACED
1603 ptsname NEW: Unix98 PTY
1604 ptsname_r NEW: Unix98 PTY
1606 putchar_locked REMOVED
1607 putgrent NEW: GNU ext.
1609 putpmsg NEW: STREAMS
1610 pututxline NEW: Unix98
1614 readdir64_r NEW: LFS
1615 remquo NEW: ISO C 9x
1616 remquof NEW: ISO C 9x
1617 remquol NEW: ISO C 9x
1619 roundf NEW: ISO C 9x
1620 roundl NEW: ISO C 9x
1622 scalbln NEW: ISO C 9x
1623 scalblnf NEW: ISO C 9x
1624 scalblnl NEW: ISO C 9x
1626 sendfile NEW: kernel
1627 setcontext NEW: Unix98
1628 setrlimit64 NEW: LFS
1629 setutxent NEW: Unix98
1631 sigignore NEW: Unix98
1632 sigqueue NEW: POSIX.1b
1633 sigrelse NEW: Unix98
1634 sigset NEW: POSIX.1b
1635 sigtimedwait NEW: POSIX.1b
1636 sigwaitinfo NEW: POSIX.1b
1637 sincos NEW: GNU ext.
1638 sincosf NEW: GNU ext.
1639 sincosl NEW: GNU ext.
1643 strcasestr NEW: GNU ext.
1644 strtoimax NEW: ISO C 9x
1645 strtoumax NEW: ISO C 9x
1646 strverscmp NEW: GNU ext.
1647 svcauthdes_stats NEW: Secure RPC
1648 svcunix_create NEW: sunrpc etx
1649 svcunixfd_create NEW: sunrpc ext
1650 swapcontext NEW: Unix98
1651 tcgetsid NEW: Unix98 PTY
1652 tdestroy NEW: GNU ext.
1653 tgamma NEW: ISO C 9x
1654 tgammaf NEW: ISO C 9x
1655 tgammal NEW: ISO C 9x
1659 truncf NEW: ISO C 9x
1660 truncl NEW: ISO C 9x
1662 unlockpt NEW: Unix98 PTY
1663 updwtmpx NEW: Unix98
1664 user2netname NEW: Secure RPC
1665 utmpxname NEW: Unix98
1666 versionsort NEW: GNU ext.
1667 versionsort64 NEW: GNU ext.
1669 wcscasecmp NEW: GNU ext.
1670 wcsncasecmp NEW: GNU ext.
1671 wcsnlen NEW: GNU ext.
1672 wcstoimax NEW: ISO C 9x
1673 wcstoll NEW: ISO C 9x
1674 wcstoull NEW: ISO C 9x
1675 wcstoumax NEW: ISO C 9x
1677 wordexp NEW: POSIX.2
1678 wordfree NEW: POSIX.2
1679 write_profiling REMOVED
1680 xdecrypt NEW: Secure RPC
1681 xdr_authdes_cred NEW: Secure RPC
1682 xdr_authdes_verf NEW: Secure RPC
1683 xdr_cryptkeyarg NEW: Secure RPC
1684 xdr_cryptkeyarg2 NEW: Secure RPC
1685 xdr_cryptkeyres NEW: Secure RPC
1686 xdr_getcredres NEW: Secure RPC
1687 xdr_key_netstarg NEW: Secure RPC
1688 xdr_key_netstres NEW: Secure RPC
1689 xdr_keybuf NEW: Secure RPC
1690 xdr_keystatus NEW: Secure RPC
1691 xdr_netnamestr NEW: Secure RPC
1692 xdr_sizeof NEW: Secure RPC
1693 xdr_unixcred NEW: sunrpc ext
1694 xencrypt NEW: Secure RPC
1695 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1706 * inet_ntoa is thread-safe
1708 * updwtmp is moved from libutil to libc
1710 * rewrite of cbrt function
1712 * update of timezone data
1726 * add atoll function
1728 * fix complex problems in Berkeley DB code
1730 * fix math functions
1734 * fixed lots of header problems (especially Linux/GNU specific)
1736 * dynamic loader preserves all registers
1738 * Roland McGrath provided support for handling of auxiliary objects in
1739 the ELF dynamic loader.
1741 * support for parallel builds is improved
1745 * GNU extensions are no longer declared by default. To enable them you
1746 must define the macro `_GNU_SOURCE' in your program or compile with
1749 * The library has changed from using GNU ld symbol aliases to using weak
1750 symbols where available. The ELF object file format supports weak
1751 symbols; GNU ld also supports weak symbols in the a.out format. (There
1752 is also now support for other GNU ld extensions in ELF. Use the
1753 `--with-elf' option to configure to indicate you have ELF, and
1754 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1755 of many files which contained only symbol aliases, reducing the size of
1756 the source and the compiled library; many other files were renamed to
1757 less cryptic names previously occupied by the symbol alias files.
1758 There is a new header file <elf.h> for programs which operate on
1759 files in the ELF format.
1761 * Converted to Autoconf version 2, so `configure' has more options.
1762 Run `configure --help' to see the details.
1764 * The library can now be configured to build profiling, highly-optimized
1765 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1766 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1767 `configure' enable building these extra libraries. The shared library is
1768 built by default when using both ELF and GNU ld. When shared libraries
1769 are enabled, the new library `-ldl' is available for arbitrary run-time
1770 loading of shared objects; its interface is defined in <dlfcn.h>. The
1771 new header file <link.h> gives access to the internals of the run-time
1772 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1773 application of same name on other systems and it provides information
1774 about dynamically linked binaries.
1776 * The C library now provides the run-time support code for profiling
1777 executables compiled with `-pg'. Programs can control the profiling code
1778 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1779 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1780 the support for this file format was contributed by David Mosberger-Tang.
1782 * The math code has been replaced with a math library based on fdlibm from
1783 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1784 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1785 functions. The math functions now reside in a separate library, so
1786 programs using them will need to use `-lm' their linking commands.
1788 * John C. Bowman contributed optimized ix87 assembler inline functions.
1790 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1791 mechanism similar to that found in Solaris 2. This is now used for the
1792 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1793 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1794 file controls what services are used for each individual database. This
1795 works by loading shared libraries with names specified in `nsswitch.conf',
1796 so service modules can be changed or added at any time without even
1797 relinking any program. Currently there are the file, db, and NIS based
1798 NSS services available.
1800 * The new functions `strtoq' and `strtouq' parse integer values from
1801 strings, like `strtol' and `strtoul', but they return `long long int' and
1802 `unsigned long long int' values, respectively (64-bit quantities).
1804 * The new functions `strtof' and `strtold' parse floating-point values from
1805 strings, like `strtod', but they return `float' and `long double' values,
1806 respectively (on some machines `double' and `long double' are the same).
1808 * Ulrich Drepper has contributed new implementations of the floating-point
1809 printing and reading code used in the `printf' family of functions and
1810 `strtod', `strtof', and `strtold'. These new functions are perfectly
1811 accurate, and much faster than the old ones.
1813 * The implementation of the POSIX locale model was completely rewritten by
1814 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1815 to compile the POSIX locale definition.
1817 * The former dummy implementations of the strcoll and strxfrm function are
1818 now replaced by fully functional code contributed by Ulrich Drepper. The
1819 collation information comes from the POSIX locale definitions.
1821 * The new header <langinfo.h> defines an interface for accessing
1822 various locale-dependent data (using the locale chosen with `setlocale').
1824 * Ulrich Drepper has contributed a new suite of functions for operation on
1825 wide-character and multibyte-character strings, in <wchar.h>;
1826 and classification and case conversion of wide characters, in <wctype.h>.
1827 These new functions are conforming to the ISO C, Amendement 1 specification.
1829 * There is now a second implementation of the standard I/O library available.
1830 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1831 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1833 * You can now use positional parameter specifications in format strings
1834 for the `printf' and `scanf' families of functions. For example,
1835 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1836 ``Number 6, Mr Jones''. This is mainly useful when providing different
1837 format strings for different languages, whose grammars may dictate
1838 different orderings of the values being printed. To support this
1839 feature, the interface for `register_printf_handler' has changed; see
1840 the header file <printf.h> for details.
1842 * The `printf' and `scanf' families of functions now understand a new
1843 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1844 to group numbers as indicated by the locale; for `scanf' and friends, this
1845 says to accept as valid only a number with all the proper grouping
1846 separators in the right places. In the default "C" locale, numbers are
1847 not grouped; but locales for specific countries will define the usual
1848 conventions (i.e. separate thousands with `,' in the US locale).
1850 * The pgrp functions have been regularized, slightly incompatibly but much
1851 less confusingly. The core functions are now `getpgid' and `setpgid',
1852 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1853 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1854 provided for compatibility. There is no longer an incompatible `getpgrp'
1855 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1857 * The new header file <fts.h> and suite of functions simplify programs that
1858 operate on directory trees. This code comes from 4.4 BSD.
1860 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1861 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1862 NSS scheme used in glibc.
1864 * There is a new malloc debugging hook `__memalign_hook'.
1866 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1867 `unsigned int' in <sys/types.h>. These are for compatibility only and
1868 their use is discouraged.
1870 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1871 done differently, so that it works even without GNU ld.
1873 * New function `euidaccess' checks allowed access to a file like `access',
1874 but using the effective IDs instead of the real IDs.
1876 * The time zone data files have been updated for the latest and greatest
1877 local time conventions of the countries of the world.
1879 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1882 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1883 for formatting floating-point numbers. They are provided only for
1884 compatibility; new programs should use `sprintf' instead. There are
1885 also equivalent function for the `long double' floating-point type and
1886 all functions also exist in a reentrant form.
1888 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1889 functions for maintaining the login-record files (primarily of use to
1890 system programs such as `login'), and convenient functions for
1891 allocating and initializing a pseudo-terminal (pty) device.
1893 * Ulrich Drepper has contributed new support for System V style
1894 shared memory and IPC on systems that support it.
1896 * Ulrich Drepper has contributed several miscellaneous new functions found
1897 in System V: The `hsearch' family of functions provide an effective
1898 implementation of hash tables; `a64l' and `l64a' provide a very simple
1899 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1902 * Ulrich Drepper has contributed new reentrant counterparts for the
1903 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1905 * Ulrich Drepper has contributed new, highly-optimized versions of several
1906 string functions for the i486/Pentium family of processors.
1908 * Ulrich Drepper has updated the Linux-specific code, based largely
1909 on work done in Hongjiu Lu's version of GNU libc for Linux.
1910 The GNU library now supports Linux versions 2.0.10 and later,
1911 using the ELF object file format (i[3456]86-*-linux).
1913 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1915 * David Mosberger-Tang and Richard Henderson have ported the C library
1916 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1917 dynamic linking support for ELF/Alpha.
1919 * Richard Henderson contributed several Alpha optimized assembler function
1920 for arithmetic and string handling.
1922 * Ulrich Drepper has contributed a new set of message catalog functions to
1923 support multiple languages using the <libintl.h> interface, for use with
1924 his new package GNU gettext. Translation volunteers have contributed
1925 catalogs of the library's messages in Spanish, German, and Korean.
1927 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1928 program and the `catgets' function for reading the catalog files it
1929 creates. (The <libintl.h> interface is preferred; we include the
1930 <nl_types.h> interface using `catgets' only for source compatibility with
1931 programs already written to use it.)
1933 * New header file <values.h> gives SVID-compatible names for <limits.h>
1936 * Various new macros, declarations, and small header files for compatibility
1939 * New function `group_member' is a convenient way to check if a process has
1940 a given effective group ID.
1942 * When using GCC 2.7 and later, the socket functions are now declared in a
1943 special way so that passing an argument of type `struct sockaddr_in *',
1944 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1945 `struct sockaddr *' type, does not generate a type-clash warning.
1947 * New function `error' declared in header file <error.h> is a convenient
1948 function for printing error messages and optionally exiting; this is the
1949 canonical function used in GNU programs. The new functions `err', `warn',
1950 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1951 doing the same thing.
1953 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1954 POSIX.2 `glob' function to do ~ and {...} expansion.
1956 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1957 `clearenv' which is used in POSIX.9 is also available.
1959 * New function `getsid' returns session ID number on systems that support it.
1961 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1962 files <db.h> and <mpool.h> provide a rich set of functions for several
1963 types of simple databases stored in memory and in files, and <ndbm.h> is
1964 an old `ndbm'-compatible interface using the `db' functions. Link with
1965 `-ldb' to get these functions.
1967 * New macro `strdupa' copies a string like `strdup', but uses local stack
1968 space from `alloca' instead of dynamic heap space from `malloc'.
1970 * New function `strnlen' is like `strlen' but searches only a given maximum
1971 number of characters for the null terminator. `stpncpy', `strndup' and
1972 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1975 * New function `statfs' in header <sys/statfs.h>.
1977 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1978 provide convenient functions for operating on blocks of null-terminated
1981 * A new suite of functions in <utmp.h> handle all the details of reading
1982 and writing the utmp file.
1984 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1987 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1988 completely POSIX compliant and also implemented the extended functionality
1989 to handle alternate digit representation and alternate era date formats.
1991 * Ulrich Drepper provided an implementation of the `strptime' function
1992 defined in XPG4.2 which transforms a string into a `struct tm' value.
1994 * Paul Eggert provided the tzselect shell script as part of the timezone
1995 code. The shell script makes it easy to select the correct timezone
1998 * The implementation of the malloc family of functions is completely replaced
1999 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2000 The implementation uses the mmap function (if available) and it is
2001 optimized for the use in multi threaded programs.
2003 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2004 functions. This new functionality is usable by specifying a special
2005 salt string and it is compatible with implementation on *BSD systems.
2007 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2008 `getsubopt' to handle second level command line options, `bsd_signal'
2009 to access BSD style `signal' functionality, the obsolete `regexp' style
2012 * the `lchown' function is available on system which support this
2015 * The implementation of the shadow password handling function was contributed
2018 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2020 * POSIX.1g support was added. The <sys/select.h> header is available,
2021 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2022 implementation of `getaddrinfo'.
2026 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2028 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2029 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2031 * The new function `daemon' from 4.4 BSD is useful for server programs that
2032 want to put themselves in the background.
2034 * Joel Sherrill has contributed support for several standalone boards that
2035 run without an operating system.
2037 * `printf', `scanf' and friends now accept a `q' type modifier for long
2038 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2040 * All of the code taken from BSD (notably most of the math and networking
2041 routines) has been updated from the BSD 4.4-Lite release.
2043 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2045 * The new functions `getdomainname' and `setdomainname' fetch or change the
2046 YP/NIS domain name. These are system calls which exist on systems which
2049 * The time zone data files have been updated for the latest international
2052 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2053 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2057 * The C library now includes support for Sun RPC, from Sun's free
2058 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2059 are included. (There is still no support for YP.)
2061 * Tom Quinn has contributed a port of the C library to SGI machines running
2062 Irix 4 (mips-sgi-irix4).
2064 * The new `lockf' function is a simplified interface to the locking
2065 facilities of `fcntl', included for compatibility.
2067 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2069 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2071 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2074 * The error message printed by `assert' for a failed assertion now includes
2075 the name of the program (if using GNU ld) and the name of the calling
2076 function (with versions of GCC that support this).
2078 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2080 * The library now includes the <sys/mman.h> header file and memory
2081 management functions `mmap', `munmap', `mprotect', `msync', and
2082 `madvise', on systems that support those facilities.
2084 * The interface for `mcheck' has changed slightly: the function called to
2085 abort the program when an allocation inconsistency is detected now takes
2086 an argument that indicates the type of failure. The new function
2087 `mprobe' lets you request a consistency check for a particular block at
2088 any time (checks are normally done only when you call `free' or `realloc'
2091 * It is now possible to easily cross-compile the C library, building on one
2092 system a library to run on another machine and/or operating system. All
2093 you need to do is set the variable `HOST_CC' in `configparms' to the
2094 native compiler for programs to run on the machine you are building on (a
2095 few generator programs are used on Unix systems); set `CC' to the
2098 * The new function `fexecve' (only implemented on the GNU system) executes
2099 a program file given a file descriptor already open on the file.
2103 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2104 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2106 * You can set the variable `libprefix' in `configparms' to specify a prefix
2107 to be prepended to installed library files; this makes it easy to install
2108 the GNU C library to be linked as `-lgnuc' or whatever.
2110 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2111 copies a limited number of characters from a string, and returns the
2112 address of the last character written.
2114 * You no longer need to check for whether the installed `stddef.h' is
2115 compatible with the GNU C library. configure now checks for you.
2117 * You can now define a per-stream `fileno' function to convert the
2118 stream's cookie into an integral file descriptor.
2120 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2121 allocates zero bytes of storage, and returns a unique pointer which
2122 you can pass to `realloc' or `free'. The behavior is undefined if
2123 you dereference this pointer.
2125 * The C library now runs on Sony NEWS m68k machines running either
2126 NewsOS 3 or NewsOS 4.
2128 * The new `syscall' function is a system-dependent primitive function
2129 for invoking system calls. It has the canonical behavior on Unix
2130 systems, including unreliable return values for some calls (such as
2131 `pipe', `fork' and `getppid').
2133 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2134 to `EAGAIN', which is the preferred name. On systems whose kernels
2135 use two distinct codes, the C library now translates EWOULDBLOCK to
2136 EAGAIN in every system call function.
2140 * The GNU C Library Reference Manual is now distributed with the library.
2141 `make dvi' will produce a DVI file of the printed manual.
2142 `make info' will produce Info files that you can read on line using C-h i
2143 in Emacs or the `info' program.
2144 Please send comments on the manual to bug-glibc-manual@gnu.org.
2146 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2148 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2150 * Jason Merrill has contributed a port to the Sequent Symmetry running
2151 Dynix version 3 (i386-sequent-dynix).
2153 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2154 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2156 * New function `memory_warnings' lets you arrange to get warnings when
2157 malloc is running out of memory to allocate, like Emacs gives you.
2159 * The C library now contains the relocating allocator used in Emacs 19 for
2160 its editing buffers. This allocator (ralloc) minimizes allocation
2161 overhead and fragmentation by moving allocated regions around whenever it
2162 needs to. You always refer to a ralloc'd region with a "handle" (a
2163 pointer to a pointer--an object of type `void **').
2165 * There is a new `printf' format: `%m' gives you the string corresponding
2166 to the error code in `errno'.
2168 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2169 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2170 pass, the `a' modifier says to fill in a `char **' you pass with a
2173 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2174 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2175 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2177 * `mkstemp' is a traditional Unix function to atomically create and open a
2178 uniquely-named temporary file.
2182 * The standard location for the file that says what the local timezone is
2183 has changed again. It is now `/usr/local/etc/localtime' (or more
2184 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2186 * The distribution no longer contains any files with names longer than 14
2189 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2190 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2192 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2196 * The configuration process has changed quite a bit. The `configure'
2197 script is now used just like the configuration scripts for other GNU
2198 packages. The `sysdeps' directory hierarchy is much rearranged.
2199 The file `INSTALL' explains the new scheme in detail.
2201 * The header files no longer need to be processed into ANSI C and
2202 traditional C versions. There is just one set of files to install, and
2203 it will work with ANSI or old C compilers (including `gcc -traditional').
2205 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2206 MIPS DECStation running Ultrix 4.
2208 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2209 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2210 made itself into a shared library.
2212 * Yet further improved support for the i386, running 4.3 BSD-like systems
2213 (such as Mach 3 with the Unix single-server), or System V.
2215 * New function `strncasecmp' to do case-insensitive string comparison
2216 with limited length.
2218 * New function `strsep' is a reentrant alternative to `strtok'.
2220 * New functions `scandir' and `alphasort' for searching directories.
2222 * New function `setenv' is a better interface to `putenv'.
2224 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2225 function for traversing a directory tree.
2227 * The GNU obstack package is now also part of the C library.
2228 The new function `open_obstack_stream' creates a stdio stream that
2229 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2230 formatted output directly to an obstack.
2232 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2233 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2235 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2237 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2238 things to your strings.
2240 * There are some new test programs: test-fseek, testmb, and testrand.
2242 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2243 These ports are not finished, but are a good starting place for really
2244 supporting those systems.
2246 * `/etc/localtime' is now the standard location for the file that says what
2247 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2248 This follows the general principle that `/etc' is the place for all local
2249 configuration files.
2251 * The C library header files now use `extern "C"' when used by the C++
2252 compiler, so the C library should now work with C++ code.
2254 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2255 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2258 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2259 function which uses the `merge sort' algorithm, and is said to be
2260 significantly faster than the old GNU `qsort' function. Merge sort is
2261 now the standard `qsort' function. The new algorithm can require a lot
2262 of temporary storage; so, the old sorting function is called when the
2263 required storage is not available.
2265 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2266 provides the Unix `crypt' function, plus some other entry points.
2268 * The code and header files taken from 4.4 BSD have been updated with the
2269 latest files released from Berkeley.
2271 ----------------------------------------------------------------------
2272 Copyright information:
2274 Copyright (C) 1992-2013 Free Software Foundation, Inc.
2276 Permission is granted to anyone to make or distribute verbatim copies
2277 of this document as received, in any medium, provided that the
2278 copyright notice and this permission notice are preserved,
2279 thus giving the recipient permission to redistribute in turn.
2281 Permission is granted to distribute modified versions
2282 of this document, or of portions of it,
2283 under the above conditions, provided also that they
2284 carry prominent notices stating who last changed them.
2287 version-control: never
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