1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2012 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 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
13 9685, 9914, 10014, 10038, 10114, 10631, 10873, 11438, 11607, 11638, 11741,
14 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679, 13696,
15 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950, 13952,
16 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157, 14166,
17 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298, 14303,
18 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376, 14417,
19 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518, 14519,
20 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568, 14576,
21 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645, 14648,
22 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719, 14743,
23 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803, 14805,
24 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833, 14835,
25 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872, 14879,
26 14889, 14893, 14898, 14914.
28 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
29 EMFILE has been fixed (Bugzilla #14889).
31 * The add-on ports collection is now distributed in the "ports" subdirectory
32 of the main GNU C Library distribution, rather than separately.
34 * Port to ARM AArch64 contributed by Linaro.
36 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
37 Optimized versions of memcpy, memset, and memcmp added for System z10 and
39 Implemented by Andreas Krebbel.
41 * The new function secure_getenv allows secure access to the environment,
42 returning NULL if running in a SUID/SGID process. This function replaces
43 the internal function __secure_getenv.
45 * SystemTap static probes have been added into the dynamic linker.
46 Implemented by Gary Benson.
48 * Optimizations of string functions strstr, strcasestr and memmem.
49 Implemented by Maxim Kuvyrkov.
51 * The minimum Linux kernel version that this version of the GNU C Library
52 can be used with is 2.6.16.
54 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
55 powerpc POWER7. Implemented by Will Schmidt.
57 * New configure option --disable-nscd builds the C library such that it
58 never attempts to contact the Name Service Caching Daemon (nscd).
59 New configure option --disable-build-nscd avoids building nscd itself;
60 this is the default if --disable-nscd is used.
62 * Improved support for cross-compilation, including cross-testing and
63 bootstrap builds without a previously built glibc.
65 * Several testsuite tests are now able to test multiple IFUNC variants of an
66 interface, rather than just testing the one that would be choosen by
69 * New configure options --with-bugurl and --with-pkgversion, for
70 distributors to use to embed their bug-reporting and package version
71 information in --help and --version output.
73 * The ttyname and ttyname_r functions on Linux now fall back to searching for
74 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
75 allows creation of chroots without the procfs mounted on /proc.
77 * The `crypt' function now fails if passed salt bytes that violate the
78 specification for those values. On Linux, the `crypt' function will
79 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
80 enabled, and fail on encrypted strings using the MD5 or DES algorithm
81 when the mode is enabled.
83 * The `clock_*' suite of functions (declared in <time.h>) is now available
84 directly in the main C library. Previously it was necessary to link with
85 -lrt to use these functions. This change has the effect that a
86 single-threaded program that uses a function such as `clock_gettime' (and
87 is not linked with -lrt) will no longer implicitly load the pthreads
88 library at runtime and so will not suffer the overheads associated with
89 multi-thread support in other code such as the C++ runtime library.
91 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
96 * The following bugs are resolved with this release:
98 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
99 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
100 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
101 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
102 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
103 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
104 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
105 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
106 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
107 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
108 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
109 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
110 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
111 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
112 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
113 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
114 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
115 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
116 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
117 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
118 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
119 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
122 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
123 configuring glibc with:
124 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
125 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
126 Implemented by H.J. Lu.
130 + define static_assert
132 + do not declare gets
134 + declare at_quick_exit and quick_exit also for ISO C11
136 + aligned_alloc. NB: The code is deliberately allows the size parameter
137 to not be a multiple of the alignment. This is a moronic requirement
138 in the standard but it is only a requirement on the caller, not the
143 + uchar.h support added
145 + CMPLX, CMPLXF, CMPLXL added
147 Implemented by Ulrich Drepper.
149 * Support for the IA-64 has been moved to ports.
151 * Remove support for anything but ELF binary format
153 * Checking versions of poll, ppoll added.
154 Implemented by Ulrich Drepper.
156 * More generic and 64-bit performance optimizations to math functions.
157 Implemented by Ulrich Drepper.
159 * New configure option --enable-obsolete-rpc makes the deprecated RPC
160 headers and functions available at compile time as they were before
161 version 2.14. This option will be removed at some time in the future
162 after the TI-RPC library becomes fully sufficient for the needs of
163 existing applications.
165 * Compatibility code for Linux kernel versions before 2.4 has been removed.
166 Note that glibc is not expected to work with any Linux kernel version
169 * New header <sys/auxv.h> and function getauxval allowing easy access to
170 the AT_* key-value pairs passed from the Linux kernel. The header also
171 defines the HWCAP_* bits associated with the AT_HWCAP key.
173 * New locales: mag_IN
175 * New configure option --enable-systemtap builds SystemTap static probes
176 into libc for setjmp and longjmp and into libpthread for various operations.
177 So far the setjmp/longjmp probes and some of the libpthread probes are
178 provided only for i*86 and x86_64.
179 Implemented by Roland McGrath and Rayson Ho.
181 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
183 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
186 * More optimized functions for SPARC. Implemented by David S. Miller.
188 * Improved support for cross-compilation, especially bootstrap builds
189 without a previously built glibc.
191 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
192 Chris Metcalf from Tilera.
194 * Support for the old ARM ABI has been removed from ports. Only the EABI is
195 now supported for ARM processors.
197 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
198 as the name of the dynamic linker, to distinguish it from the
199 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
201 * Support for CRIS has been removed from ports.
203 * A new class of installed header has been documented for low-level
204 platform-specific functionality. PowerPC added the first instance with a
205 function to provide time base register access. Contributed by Tulio
206 Magno Quites Machado Filho.
208 * ix86 configurations now install header files that are consistent with
209 what x86-64 configurations install. These same header files can be used
210 for -m32, -m64, or -mx32 builds.
211 Contributed by H.J. Lu.
213 * Math library bug fixes. A thorough audit of all open math library bugs was
214 conducted by Joseph Myers. Significant progress was made on many math
215 library bugs resulting in more accurate exceptions and function results.
216 Many thanks to all those that contributed including Andreas Jaeger for his
217 patch review and work on the x87 trigonometric instruction issues.
219 * Timezone data is no longer installed. Timezone-related binaries and scripts
220 will continue to be installed. Users should obtain their timezone data from
221 their distribution provider or from the tzdata package at
222 <ftp://munnari.oz.au/pub/>.
226 * The following bugs are resolved with this release:
228 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
229 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
230 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
231 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
232 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
233 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
234 13484, 13506, 13515, 13523, 13524, 13538, 13540
236 * New program pldd to list loaded object of a process
237 Implemented by Ulrich Drepper.
239 * Add nss_db support back to glibc. No more dependency on Berkeley db
240 and support for initgroups lookups.
241 Implemented by Ulrich Drepper.
243 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
244 Contributed by HJ Lu.
246 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
247 Contributed by HJ Lu.
249 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
250 on x86-32 and x86-64.
251 Contributed by Liubov Dmitrieva.
253 * Optimized strchr and strrchr for SSE on x86-32.
254 Contributed by Liubov Dmitrieva.
256 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
257 for x86-64 and x86-32.
258 Contributed by Liubov Dmitrieva.
260 * New interfaces: scandirat, scandirat64
261 Implemented by Ulrich Drepper.
263 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
264 Implemented by Ulrich Drepper.
266 * nscd now also caches the netgroup database.
267 Implemented by Ulrich Drepper.
269 * Integrate libm with gcc's -ffinite-math-only option.
270 Implemented by Ulrich Drepper.
272 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
273 to math functions. Implemented by Ulrich Drepper.
275 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
276 Implemented by Ulrich Drepper.
278 * New Linux interfaces: process_vm_readv, process_vm_writev
280 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
281 Implemented by Ulrich Drepper.
283 * Optimized nearbyint and strcasecmp for PPC.
284 Implemented by Adhemerval Zanella.
286 * New locales: bho_IN, unm_US, es_CU, ta_LK
290 * The following bugs are resolved with this release:
292 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
293 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
294 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
295 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
296 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
297 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
298 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
299 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
300 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
301 12795, 12811, 12813, 12814, 12841
303 * The RPC implementation in libc is obsoleted. Old programs keep working
304 but new programs cannot be linked with the routines in libc anymore.
305 Programs in need of RPC functionality must be linked against TI-RPC.
306 The TI-RPC implementation is IPv6 enabled and there are other benefits.
308 Visible changes of this change include (obviously) the inability to link
309 programs using RPC functions without referencing the TI-RPC library and the
310 removal of the RPC headers from the glibc headers.
311 Implemented by Ulrich Drepper.
313 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
314 syncfs, setns, sendmmsg
316 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
317 yue_HK, lij_IT, mhr_RU
319 * New encodings: CP770, CP771, CP772, CP773, CP774
321 * New program sotruss to trace calls through PLTs
322 Implemented by Ulrich Drepper.
324 * The malloc hook implementation is marked deprecated and will be removed
325 from the default implementation in the next version. The design never
326 worked ever since the introduction of threads. Even programs which do
327 not create threads themselves can use multiple threads created internally.
331 * The following bugs are resolved with this release:
333 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
334 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
335 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
336 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
339 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
341 * POWER7 optimizations: memset, memcmp, strncmp
343 * New optimized string functions for x86-64: strnlen (SSE2),
344 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
345 Implemented by Ulrich Drepper.
349 * The following bugs are resolved with this release:
351 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
352 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
353 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
354 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
355 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
356 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
357 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
358 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
360 * New interfaces: pthread_getname_np, pthread_setname_np
362 * New Linux interface: recvmmsg
364 * STT_GNU_IFUNC implemented for Sparc by David Miller.
366 * The dynamic linker now recognizes supported ABI versions from the
367 EI_ABIVERSION field in the ELF header.
368 Implemented by Ulrich Drepper.
370 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
371 will not be used to fill in password fields in the passwd.byname replies.
372 Instead it is used to synthesize the shadow.byname table, should it be
373 missing. This is a useful mode in some installations involving Solaris.
374 Implemented by Ulrich Drepper.
376 * New locales: kok_IN, sq_MK, cv_RU
380 * The following bugs are resolved with this release:
382 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
383 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
384 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
385 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
386 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
387 10789, 10817, 10823, 10840, 10847
389 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
391 Implemented by Ulrich Drepper.
393 * Checking version of longjmp added that fails if an uninitialized stack
394 frame would be created. Implemented by Ulrich Drepper.
396 * STT_GNU_IFUNC is now supported in static executables.
397 Implemented by H.J. Lu.
399 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
401 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
402 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
403 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
404 Contributed by H.J. Lu.
406 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
407 Implemented by Ulrich Drepper.
409 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
411 Contributed by H.J. Lu.
413 * Support for fma instruction in AVX on x86-64.
414 Implemented by H.J. Lu and Ulrich Drepper.
416 * AVX support in x86-64 auditing support in ld.so.
417 Implemented by H.J. Lu.
419 * STB_GNU_UNIQUE support added.
420 Implemented by Ulrich Drepper.
422 * Implement second fallback mode for optimized DNS lookup for even more
423 broken environments. If two requests from the same port are not
424 handled correctly close the socket and open a new one before sending
425 the second request. The 'single-request-reopen' option in /etc/resolv.conf
426 can be used to select this mode right away, instead of rediscovering the
427 necessity is every process again.
428 Implemented by Ulrich Drepper.
430 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
431 Implemented by Adam Tkac.
433 * Optimized iconv conversions for S390x.
434 Implemented by Andreas Krebbel.
436 * Using condvars with PI mutexes is now more efficient due to kernel
437 support for requeueing to PI futexes. NPTL support added for x86-64.
438 Implemented by Ulrich Drepper.
440 * New locales: ps_AF, my_MM
444 * The following bugs are resolved with this release:
446 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
447 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
448 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
449 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
450 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
452 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
453 Implemented by Ulrich Drepper.
455 * New Linux interfaces: accept4, fallocate, fallocate64.
456 Implemented by Ulrich Drepper.
458 * Correct declarations of string function when used in C++ code. This
459 could lead to compile errors for invalid C++ code.
461 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
464 * New POSIX 2008 interface: psiginfo
465 Implemented by Ulrich Drepper.
467 * New ISO C++1x interfaces: quick_exit, at_quick_exit
468 Implemented by Ulrich Drepper.
470 * Support for selecting between multiple function definitions at runtime
471 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
473 * The libcrypt library can now use the hash function implementations in
474 NSS. Implemented by Ulrich Drepper.
476 * The malloc implementation can be compiled to be less memory efficient
477 but higher performing in multi-threaded programs.
478 Implemented by Ulrich Drepper.
480 * New locales: nan_TW@latin, ks_IN
482 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
483 Implemented by Ulrich Drepper.
485 * Extended printf hook support. It is possible to use user-defined types
486 and extend existing format specifiers.
487 Implemented by Ulrich Drepper.
489 * Handling for group shadow files has been added.
490 Implemented by Ulrich Drepper.
492 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
493 servers (the case, e.g., for some people using the built-in DNS
494 server in ADSL modems/routers). There is a once-per-process timeout
495 in case of a broken server. To avoid it, users can run nscd or put
496 'options single-request' in /etc/resolv.conf.
497 Implemented by Ulrich Drepper.
501 * The following bugs are resolved with this release:
503 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
504 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
505 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
506 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
507 6968, 6974, 6980, 6995, 7008, 7009, 7029
509 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
510 up at the same time. Implemented by Ulrich Drepper.
512 * TLS descriptors for LD and GD on x86 and x86-64.
513 Implemented by Alexandre Oliva.
515 * getaddrinfo now handles DCCP and UDPlite.
516 Implemented by Ulrich Drepper.
518 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
519 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
520 Implemented by Ulrich Drepper.
522 * New implementation of memmem, strstr, and strcasestr which is O(n).
523 Implemented by Eric Blake.
525 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
527 * Implement "e" option for popen to open file descriptor with the
528 close-on-exec flag set. Implemented by Ulrich Drepper.
530 * Implement "b" mode for fmemopen. In this mode writes writes don't
531 implicitly add a NUL byte and seeks from the end of the buffer really
532 use the buffer end, not the string length as the basis.
533 Implemented by Ulrich Drepper.
535 * Many functions, exported and internal, now atomically set the close-on-exec
536 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
538 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
540 Implemented by Pravin Satpute.
542 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
546 * The following bugs are resolved with this release:
548 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
549 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
550 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
551 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
552 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
553 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
554 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
556 * New locales: bo_CN, bo_IN, shs_CA.
558 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
560 * Sorting rules for some Indian languages (Devanagari and Gujarati).
561 Implemented by Pravin Satpute.
563 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
565 * nscd caches now all timeouts for DNS entries
566 Implemented by Ulrich Drepper.
568 * nscd is more efficient and wakes up less often.
569 Implemented by Ulrich Drepper.
571 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
572 vdprintf, and obstack_vprintf.
573 Implemented by Jakub Jelinek.
575 * Faster memset for x86-64.
576 Implemented by Harsha Jagasia and H.J. Lu.
578 * Faster memcpy on x86.
579 Implemented by Ulrich Drepper.
581 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
582 Implemented by Ulrich Drepper.
584 * Faster sqrt and sqrtf implemention for some PPC variants.
585 Implemented by Steven Munroe.
589 * The following bugs are resolved with this release:
591 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
592 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
593 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
594 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
595 5071, 5103, 5104, 5112, 5113, 5184, 5186
597 * More checking functions: fread, fread_unlocked, open*, mq_open.
598 Implemented by Jakub Jelinek and Ulrich Drepper.
600 * Extend fortification to C++. Implemented by Jakub Jelinek.
602 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
603 by not recognizing 'a' as a modifier when those specs are requested.
604 Implemented by Jakub Jelinek.
606 * PPC optimizations to math and string functions.
607 Implemented by Steven Munroe.
609 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
610 options to be passed. Implemented by Ulrich Drepper.
612 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
614 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
615 Implemented by Ulrich Drepper.
617 * Handle private futexes in the NPTL implementation.
618 Implemented by Jakub Jelinek and Ulrich Drepper.
620 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
621 Implemented by Roland McGrath and Ulrich Drepper.
623 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
625 * SHA-256 and SHA-512 based password encryption.
626 Implemented by Ulrich Drepper.
628 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
629 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
632 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
633 Implemented by Ulrich Drepper.
637 * The following bugs are resolved with this release:
639 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
640 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
641 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
642 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
643 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
644 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
645 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
648 * New Linux interfaces: epoll_pwait, sched_getcpu.
650 * New generic interfaces: strerror_l.
652 * nscd can now cache the services database. Implemented by Ulrich Drepper.
656 * The following bugs are resolved with this release:
658 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
659 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
660 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
661 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
662 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
663 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
664 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
665 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
666 3225, 3251, 3252, 3253, 3273
668 * For Linux, the sorting of addresses returned by getaddrinfo now also
669 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
670 Implemented by Ulrich Drepper.
672 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
673 Implemented by Ulrich Drepper.
675 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
677 * New iconv module for MIK. Contributed by Alexander Shopov.
679 * For sites with broken group and/or passwd database, the auto-propagate
680 option of nscd can prevent creating ID lookup entries from the results
681 of a name lookup and vice versa. This usually is no problem but some
682 site might have problems with the default behavior.
683 Implemented by Ulrich Drepper.
685 * Iterating over entire database in NIS can be slow. With the
686 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
687 to trade time for memory. The entire database will be read at once.
688 Implemented by Ulrich Drepper.
690 * The interfaces introduced in RFC 3542 have been implemented by
693 * Support for the new ELF hash table format was added by Ulrich Drepper.
695 * Support for priority inheritance mutexes added by Jakub Jelinek and
698 * Support for priority protected mutexes added by Jakub Jelinek.
700 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
701 or_IN, csb_PL, fy_NL, sr_ME.
705 * More overflow detection functions.
707 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
708 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
710 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
711 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
712 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
713 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
714 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
715 by Masahide Washizawa.
717 * It is now possible to install audit libraries for the dynamic linker using
718 LD_AUDIT. Implemented by Ulrich Drepper.
720 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
721 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
722 For a libc and libpthread that works well on Linux 2.4 kernels, we
723 recommend using the stable 2.3 branch.
725 * The new function open_wmemstream acts like open_memstream,
726 but uses a wchar_t wide character buffer.
728 * The new function ppoll is an improved version of poll, similar to pselect.
730 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
731 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
732 renameat, unlinkat, linkat, symlinkat, readlinkat.
734 * New Linux kernel system calls: unshare,
735 inotify_init, inotify_add_watch, inotify_rm_watch.
737 * The euidaccess function is now also known by the alias eaccess,
738 for compatibility with some other systems.
740 * Timezone data updated to 2006b version.
744 * The following bugs are resolved with this release:
746 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
747 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
748 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
749 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
750 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
751 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
753 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
755 * As of this release, GCC 4 can be used to compile the C Library.
757 * Timezone data updated to 2005m version.
761 * The following bugs are resolved with this release:
763 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
764 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
765 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
766 777, 787, 821, 822, 823, 825
768 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
772 * Support for RFC 3678. Real implementations exist only for Linux so far.
773 Implemented by Ulrich Drepper.
775 * nscd can now cache entries persistently. Expiring entries are reloaded.
776 For speedups the cache can be shared in memory with client processes.
777 Implemented by Ulrich Drepper.
779 * nscd can now perform SELinux checks.
780 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
782 * getaddrinfo queries are now cached. Canonical name lookup is performed
784 Implemented by Ulrich Drepper.
786 * The nothrow function attribute is used when headers are used by gcc when
787 compiling C code. This can avoid significant amounts of exception
790 * The malloc functions perform more error checking and are stricter when
791 it comes to reacting on errors. The default action is to terminate
792 the process after showing an error message. Implemented by Ulrich Drepper.
794 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
795 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
797 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
798 namespaces using the new function dlmopen(). This feature is of course,
799 like most other dynamic loading functionality, not available in statically
800 linked applications. Implemented by Ulrich Drepper.
802 * Low-overhead boundary checking variants of string and some stdio functions
803 were added. These are to be used in conjunction with a gcc patch by
804 Jakub Jelinek which adds calls to these functions if possible.
805 Implemented by Jakub Jelinek and Ulrich Drepper.
807 * Old code for several operating systems and machine architectures that
808 have not been in working condition in a long time have been removed from
809 the main source tree maintained by the GNU C Library's maintainers.
810 These files are now reside in the separate `ports' source module
811 that is usable as an add-on when building the library.
815 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
816 interrogate the dynamic linker, compatible with the Solaris interface.
818 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
819 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
821 * getifaddrs now uses the netlink interface on Linux to get its information.
822 Implemented by Thorsten Kukuk.
824 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
825 Implemented by Ulrich Drepper.
827 * support for non-executable stacks on x86 has been added. Changes mostly
830 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
833 * getaddrinfo now performs destination address selection according to
838 * Thread-safe interfaces for many functions that access locale data
839 were added in version 2.3, but these features were omitted from NEWS.
840 Many functions have variants with an `_l' suffix that take a `locale_t'
841 object as a parameter rather than consulting the current locale.
842 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
843 create and maintain `locale_t' objects. Additionally, the new function
844 `uselocale' sets "the current locale" (as used by functions not so
845 parameterized) set for an individual thread. These features were added
846 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
848 * The functions getresuid, getresgid, setresuid, and setresgid, which
849 have long been available on Linux, are now declared in <unistd.h>
850 and are now also available on the Hurd.
852 * ELF thread-local storage support (TLS) now works on x86-64.
854 * The new dynamic string token $LIB is expanded in shared library names.
855 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
857 * Aldy Hernandez contributed complete software floating point support for
858 PowerPC machines with no FPU.
860 * fexecve is implemented on Linux.
862 * The `btowc' function should work at least twice as fast due to
863 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
865 * With approriate thread add-ons cancelable functions are now implemented
866 in libc.so as well. No need to call the function in libpthread. This
867 change allowed to finally disable the incorrect and expensive handling
868 of weak definition in ld.so.
870 * Yet more PLT entries in libc.so have been removed. We finally arrived
871 at the bare minimum. Startup times improved appropriately.
873 * Support for the new Linux/x86 system call interface was added. The
874 AT_SYSINFO auxiliary vector entry is recognized and handled.
878 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
881 * iconv (the program and the interface) now accepts empty names (excluding
882 options like //TRANSLIT) to mean "use charset of current locale".
884 * localedef can now transliterate characters in strings which are not in
885 the provided charmap. The information from the input locale is used.
887 * Prelinking support was added for ELF targets. This requires additional
888 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
890 * Read-only stdio streams now use mmap to speed up operation by eliminating
891 copying and buffer underflows. To use add 'm' to the mode string of
892 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
894 * The malloc functions were completely rewritten by Wolfram Gloger based
895 on Doug Lea's malloc-2.7.0.c.
897 * Isamu Hasegawa contributed a completely new and POSIX-conformant
898 implementation of regex.
900 * Bruno Haible upgraded the iconv and locale implementation to support
903 * Contents of the LC_* and LANG environment variables in the CEN style are
904 not recognized anymore. It never was used. Change by Ulrich Drepper.
906 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
907 thread-local storage (TLS) ABI on some platforms.
908 Changes by Ulrich Drepper. SH support by Kaz Kojima.
910 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
911 EUC-JISX0213, and TSCII.
913 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
914 BSD-compatible interface for getting all network interface addresses.
915 Implementation for IPv4 by Roland McGrath.
917 * Loading of locale data is faster due to the introduction of a locale
918 archive. Implemented by Roland McGrath and Ulrich Drepper.
920 * Startup times are significantly reduced by not using exported functions
921 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
924 * Steven Munroe contributed a port to PowerPC64/Linux.
928 * The Hurd now uses the GNU libio implementation of stdio rather than the
929 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
931 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
932 with the same behavior as the Linux system call of the same name.
936 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
937 128-bit long double format.
939 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
940 IBM1161, and IBM1162 charsets.
942 * Andreas Jaeger contributed a port to x86-64/Linux.
944 * Peter Bruin contributed a port to PowerPC/Hurd.
946 * libc functions using I/O streams now can handle wide-oriented streams
949 * optimizations in the dynamic linker. Binaries created by recent binutils
950 versions start up quicker due to reduced time spent on relocations.
952 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
956 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
957 asinh, atanh, j0 for the 128-bit long double format.
959 * Bruno Haible updated all the code handling Unicode in some form to
962 * Speed of regex for single-byte locales is back to previous levels.
963 Patch by Isamu Hasegawa.
965 * Alpha, SPARC, and IA-64 now also using floating stacks.
967 * Startup time of internationalized applications greatly improved through
968 iconv cache. Use iconvconfig to generate the cache file.
969 Contributed by Ulrich Drepper.
971 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
972 severe performance problems. Patch by David Mosberger.
974 * The Hurd port got a lot more functionality like AIO, various stdio
975 extensions, etc. Mainly done by Roland McGrath.
977 * mtrace can now lookup symbols in shared libraries.
981 * Intel's IA-64 math library is largely integrated. It provides fast and
982 accurate implementatations for most basic and standard math functions
983 in float, double, and long double format.
985 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
986 and asin for the 96-bit long double format and asin, log, tan for the
987 128-bit long double format.
989 * The beginning of a last-bit accurate math library by IBM Haifa were added.
990 The basic double functions exist today. Contributed by Abraham Ziv
991 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
992 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
994 * An asynchronous name lookup library was added. The interface is designed
995 after POSIX AIO. The proposal was circulated beforehand to get comments.
996 No negative ones came in. Implemented by Ulrich Drepper.
998 * Port to S390/64bit contributed by Martin Schwidefsky
999 <schwidefsky@de.ibm.com>.
1001 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1002 of functions for Linux/IA-64.
1004 * The RPC code is now thread safe. Threads can now use the same service
1005 of different services at the same time. Patch by Eric Norum
1006 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1008 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1009 family of functions for Linux/S390.
1011 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1012 of functions for Linux/x86.
1014 * Port to Linux/CRIS contributed by Axis Communications.
1018 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1019 we can now check for namespace violations and missing declarations. The
1020 result is that almost all headers are now Unix-compliant (as defined in
1021 the upcoming XPG6). The negative side is that some programs might need
1022 corrections, too, if they depend on the incorrect form of the headers in
1023 previous versions which defined too many symbols and included too many
1026 * regex now handles multibyte character sets correctly.
1027 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1029 * iconv (the program) does now conform to the upcoming XPG6 and handles
1030 charmaps. Instead of the charset names the path of charmaps can be
1031 provided and the conversion happens based on this data.
1032 Contributed by Ulrich Drepper.
1034 * The locale program now provides detailed information about the installed
1039 only lists the names of the supported locales
1043 provides details such as country, language, and codeset name.
1044 Contributed by Ulrich Drepper.
1048 * The gencat program now parses the input file according to the charset
1049 selected by the LC_CTYPE category. This is important for stateful
1050 character sets. To make generating catalogs easier there is a way
1051 to overwrite the charset selected by the locale: before the first
1052 message or $ quote line the catalog can contain a line like
1054 $ codeset=ISO-8859-2
1056 to select the charset (ISO-8859-2 in this case).
1058 Implemented by Shinya Hanataka and Ulrich Drepper.
1060 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1061 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1062 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1064 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1065 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1067 * The LANGUAGE environment variable is now ignored unless the locale is
1068 changed from the default "C" locale.
1070 * The usual bug fixes.
1074 * Greg McGary added runtime support for bounds checking using gcc's
1075 new -fbounded-pointers option. ix86 target is complete. PowerPC
1078 * Thorsten Kukuk added secure mode support to nscd.
1080 * The Berkeley db libraries have been removed.
1082 Related, the nss_db module is now in a separate package since it
1083 obviously requires a database library being available.
1085 * Wide character I/O streams implemented by Ulrich Drepper.
1087 * Functions from the extended socket API added by Ulrich Drepper.
1089 * Functions feenableexcept and fedisableexcept to control the
1090 behaviour of individual exceptions have been added by Andreas Jaeger.
1092 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1094 * The resolver code has been updated from bind 8.2.3-T5B which supports
1095 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1098 This change could in some situations effect backward compatibility. Since
1099 now `_res' is a thread-local instead of a global variable, modifying it
1100 in one thread does not have any effect in other threads.
1102 The resolver library was also extended to allow IPv6 as the transport
1103 protocol for the requests. This work was done by Stig Venaas.
1105 * Compatibility code for K&R C compilers has been removed from the
1106 header files. A ISO C compiler is needed to use the library
1107 (conforming to either C89 or C99 standard).
1109 * Complete rewrite of the localedef program to support multibyte character
1110 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1111 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1112 Implemented by Ulrich Drepper.
1114 Bruno Haible significantly improved the generation and use of the data
1115 structures for the wide character tables.
1117 * Plural handling in gettext implemented by Ulrich Drepper.
1119 * The utmp daemon has been removed.
1121 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1123 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1126 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1128 * POSIX barriers implemented by Kaz Kylheku.
1130 * POSIX spawn function family implemented by Ulrich Drepper.
1132 * POSIX spinlocks are now available.
1134 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1136 * the configure option --enable-kernel=X.Y.Z allows to strip out
1137 compatibility for kernel versions before X.Y.Z. This is currently only
1138 implemented for Linux.
1140 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1141 field sin6_scope_id. This means that all programs using IPv6 should be
1142 recompiled. Don't expect binary compatibility with previous glibc
1145 * various conversion modules for IBM character sets contributed by
1148 * IA-64 port by Jes Sorensen and HJ Lu.
1162 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1164 * New xdr functions are added; some rpc functions are now 64bit clean.
1166 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1168 * Fixed known incompatibilities with glibc 2.0.
1170 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1172 * Optimized a number of functions (especially the ELF dynamic loader).
1174 * Update timezone data files.
1176 * lots of charmaps corrections
1178 * some new locale definitions and charmaps
1183 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1184 conform to POSIX member type requirements. Symbol versions have been
1185 adjusted as needed within the library, and for direct use by applications,
1186 but there is potential for problems if third-party libraries use
1187 struct timeval as part of their interface. This does not present
1188 a problem for X and other "essential" system libraries.
1190 * An additional locale model to support C++ Standard Library locale
1191 model and probably more was implemented by Ulrich Drepper.
1193 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1196 * Miles Bader provided the `argp' function family to support hierachical
1197 command line argument parsing, layered on top of getopt.
1199 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1201 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1204 * scanf recognizes the %a and %A format for scanning floating point numbers.
1206 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1207 information and interfaces for the available integer types.
1209 * about 130 new math functions were added to implement the ISO C9x math
1212 * the new header <complex.h> contains definitions of the complex math
1213 functions from ISO C 9X.
1215 * the new header <tgmath.h> defines generic macros to use complex or
1216 real valued functions.
1218 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1220 * Andreas Jaeger provided a test suite for the math library.
1222 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1224 * Ulrich Drepper added character set conversion functions (iconv).
1226 * Optimized string functions have been added.
1228 * The localedata addon is now part of glibc.
1230 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1232 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1233 daemon for NSS (nscd).
1235 Missing a better place here are some numbers on improvements. Under
1236 Linux 2.1.125 un-tar-ing the kernel sources takes
1240 using local files 12.19s 6.88s 22.91s
1242 using NIS 13.92s 8.91s 26.34s
1244 using NIS & nscd 10.37s 7.34s 25.30s
1246 using NIS+ 27.57s 30.37s 640.46s
1248 using NIS+ & nscd 10.25s 7.83s 26.51s
1250 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1252 Keep in mind that non-namelookup related operations dominate above times.
1253 It was just a common complain that using NIS+ unpacking the kernel is
1256 [1] The old nscd implementation is not available anymore since it was
1257 distributed with glibc up to version 2.0.98 and thus is now replaced.
1259 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1261 * Mark Kettenis provided a Hesiod NSS module.
1263 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1264 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1266 * rcmd can now handle netgroups (Dick Streefland).
1268 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1271 * Support for the IPv6 protocol has been added to the socket API, as per the
1272 latest draft standards.
1274 * Support for Linux 2.2 has been added.
1276 * Interface changes relative to the latest 2.0.x release:
1277 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1278 addseverity NEW: Unix98
1279 alphasort64 NEW: LFS
1280 argp_err_exit_status NEW: argp, GNU ext
1281 argp_error NEW: argp, GNU ext
1282 argp_failure NEW: argp, GNU ext
1283 argp_help NEW: argp, GNU ext
1284 argp_parse NEW: argp, GNU ext
1285 argp_program_bug_address NEW: argp, GNU ext
1286 argp_program_version NEW: argp, GNU ext
1287 argp_program_version_hook NEW: argp, GNU ext
1288 argp_state_help NEW: argp, GNU ext
1289 argp_usage NEW: argp, GNU ext
1290 authdes_create NEW: Secure RPC
1291 authdes_getucred NEW: Secure RPC
1292 authdes_pk_create NEW: Secure RPC
1293 backtrace NEW: GNU ext.
1294 backtrace_symbols NEW: GNU ext.
1295 backtrace_symbols_fd NEW: GNU ext.
1297 cacosf NEW: ISO C 9x
1298 cacosh NEW: ISO C 9x
1299 cacoshf NEW: ISO C 9x
1300 cacoshl NEW: ISO C 9x
1301 cacosl NEW: ISO C 9x
1308 casinf NEW: ISO C 9x
1309 casinh NEW: ISO C 9x
1310 casinhf NEW: ISO C 9x
1311 casinhl NEW: ISO C 9x
1312 casinl NEW: ISO C 9x
1314 catanf NEW: ISO C 9x
1315 catanh NEW: ISO C 9x
1316 catanhf NEW: ISO C 9x
1317 catanhl NEW: ISO C 9x
1318 catanl NEW: ISO C 9x
1319 cbc_crypt NEW: Secure RPC
1323 ccoshf NEW: ISO C 9x
1324 ccoshl NEW: ISO C 9x
1330 cimagf NEW: ISO C 9x
1331 cimagl NEW: ISO C 9x
1332 clearerr_locked REMOVED
1333 clntunix_create NEW: sunrpc ext
1335 clog10 NEW: ISO C 9x
1336 clog10f NEW: ISO C 9x
1337 clog10l NEW: ISO C 9x
1347 cprojf NEW: ISO C 9x
1348 cprojl NEW: ISO C 9x
1350 crealf NEW: ISO C 9x
1351 creall NEW: ISO C 9x
1356 csinhf NEW: ISO C 9x
1357 csinhl NEW: ISO C 9x
1360 csqrtf NEW: ISO C 9x
1361 csqrtl NEW: ISO C 9x
1365 ctanhf NEW: ISO C 9x
1366 ctanhl NEW: ISO C 9x
1368 des_setparity NEW: Secure RPC
1369 ecb_crypt NEW: Secure RPC
1370 endutxent NEW: Unix98
1372 exp10f NEW: ISO C 9x
1373 exp10l NEW: ISO C 9x
1377 fattach NEW: STREAMS
1378 fdetach NEW: STREAMS
1382 feclearexcept NEW: ISO C 9x
1383 fegetenv NEW: ISO C 9x
1384 fegetexceptflag NEW: ISO C 9x
1385 fegetround NEW: ISO C 9x
1386 feholdexcept NEW: ISO C 9x
1388 feraiseexcept NEW: ISO C 9x
1389 ferror_locked REMOVED
1390 fesetenv NEW: ISO C 9x
1391 fesetexceptflag NEW: ISO C 9x
1392 fesetround NEW: ISO C 9x
1393 fetestexcept NEW: ISO C 9x
1394 feupdateenv NEW: ISO C 9x
1395 fflush_locked REMOVED
1399 fgets_unlocked NEW: GNU ext.
1400 fileno_locked REMOVED
1412 fputc_locked REMOVED
1413 fputs_unlocked NEW: GNU ext.
1414 fread_unlocked NEW: GNU ext.
1419 fstatvfs NEW: Unix98
1423 ftruncate64 NEW: LFS
1425 fwrite_unlocked NEW: GNU ext.
1426 gai_strerror NEW: IPv6
1430 getchar_locked REMOVED
1432 getdate_err NEW: Unix98
1433 getdate_r NEW: GNU ext.
1435 getnameinfo NEW: IPv6
1436 getnetname NEW: Secure RPC
1437 getpmsg NEW: STREAMS
1438 getpt NEW: Unix98 PTY
1439 getrlimit64 NEW: LFS
1440 getutxent NEW: Unix98
1441 getutxid NEW: Unix98
1442 getutxline NEW: Unix98
1443 glob64 NEW: GNU ext.
1444 globfree64 NEW: GNU ext.
1445 gnu_get_libc_release NEW: GNU ext.
1446 gnu_get_libc_version NEW: GNU ext.
1447 grantpt NEW: Unix98 PTY
1448 host2netname NEW: Secure RPC
1450 iconv_close NEW: iconv
1451 iconv_open NEW: iconv
1452 if_freenameindex NEW: IPv6
1453 if_indextoname NEW: IPv6
1454 if_nameindex NEW: IPv6
1455 if_nametoindex NEW: IPv6
1456 in6addr_any NEW: IPv6
1457 in6addr_loopback NEW: IPv6
1458 inet6_isipv4mapped NEW: IPv6
1459 isastream NEW: STREAMS
1460 iswblank NEW: GNU ext.
1461 key_decryptsession NEW: Secure RPC
1462 key_decryptsession_pk NEW: Secure RPC
1463 key_encryptsession NEW: Secure RPC
1464 key_encryptsession_pk NEW: Secure RPC
1465 key_gendes NEW: Secure RPC
1466 key_get_conv NEW: Secure RPC
1467 key_secretkey_is_set NEW: Secure RPC
1468 key_setnet NEW: Secure RPC
1469 key_setsecret NEW: Secure RPC
1470 llrint NEW: ISO C 9x
1471 llrintf NEW: ISO C 9x
1472 llrintl NEW: ISO C 9x
1473 llround NEW: ISO C 9x
1474 llroundf NEW: ISO C 9x
1475 llroundl NEW: ISO C 9x
1480 lrintf NEW: ISO C 9x
1481 lrintl NEW: ISO C 9x
1482 lround NEW: ISO C 9x
1483 lroundf NEW: ISO C 9x
1484 lroundl NEW: ISO C 9x
1486 makecontext NEW: Unix98
1487 mempcpy NEW: GNU ext.
1490 modify_ldt NEW: kernel
1494 nearbyint NEW: ISO C 9x
1495 nearbyintf NEW: ISO C 9x
1496 nearbyintl NEW: ISO C 9x
1497 netname2host NEW: Secure RPC
1498 netname2user NEW: Secure RPC
1499 nexttoward NEW: ISO C 9x
1500 nexttowardf NEW: ISO C 9x
1501 nexttowardl NEW: ISO C 9x
1505 passwd2des NEW: Secure RPC
1507 pow10f NEW: GNU ext.
1508 pow10l NEW: GNU ext.
1511 printf_size NEW: GNU ext.
1512 printf_size_info NEW: GNU ext.
1513 profil_counter REMOVED
1514 pthread_mutexattr_getkind_np REPLACED
1515 pthread_mutexattr_setkind_np REPLACED
1516 ptsname NEW: Unix98 PTY
1517 ptsname_r NEW: Unix98 PTY
1519 putchar_locked REMOVED
1520 putgrent NEW: GNU ext.
1522 putpmsg NEW: STREAMS
1523 pututxline NEW: Unix98
1527 readdir64_r NEW: LFS
1528 remquo NEW: ISO C 9x
1529 remquof NEW: ISO C 9x
1530 remquol NEW: ISO C 9x
1532 roundf NEW: ISO C 9x
1533 roundl NEW: ISO C 9x
1535 scalbln NEW: ISO C 9x
1536 scalblnf NEW: ISO C 9x
1537 scalblnl NEW: ISO C 9x
1539 sendfile NEW: kernel
1540 setcontext NEW: Unix98
1541 setrlimit64 NEW: LFS
1542 setutxent NEW: Unix98
1544 sigignore NEW: Unix98
1545 sigqueue NEW: POSIX.1b
1546 sigrelse NEW: Unix98
1547 sigset NEW: POSIX.1b
1548 sigtimedwait NEW: POSIX.1b
1549 sigwaitinfo NEW: POSIX.1b
1550 sincos NEW: GNU ext.
1551 sincosf NEW: GNU ext.
1552 sincosl NEW: GNU ext.
1556 strcasestr NEW: GNU ext.
1557 strtoimax NEW: ISO C 9x
1558 strtoumax NEW: ISO C 9x
1559 strverscmp NEW: GNU ext.
1560 svcauthdes_stats NEW: Secure RPC
1561 svcunix_create NEW: sunrpc etx
1562 svcunixfd_create NEW: sunrpc ext
1563 swapcontext NEW: Unix98
1564 tcgetsid NEW: Unix98 PTY
1565 tdestroy NEW: GNU ext.
1566 tgamma NEW: ISO C 9x
1567 tgammaf NEW: ISO C 9x
1568 tgammal NEW: ISO C 9x
1572 truncf NEW: ISO C 9x
1573 truncl NEW: ISO C 9x
1575 unlockpt NEW: Unix98 PTY
1576 updwtmpx NEW: Unix98
1577 user2netname NEW: Secure RPC
1578 utmpxname NEW: Unix98
1579 versionsort NEW: GNU ext.
1580 versionsort64 NEW: GNU ext.
1582 wcscasecmp NEW: GNU ext.
1583 wcsncasecmp NEW: GNU ext.
1584 wcsnlen NEW: GNU ext.
1585 wcstoimax NEW: ISO C 9x
1586 wcstoll NEW: ISO C 9x
1587 wcstoull NEW: ISO C 9x
1588 wcstoumax NEW: ISO C 9x
1590 wordexp NEW: POSIX.2
1591 wordfree NEW: POSIX.2
1592 write_profiling REMOVED
1593 xdecrypt NEW: Secure RPC
1594 xdr_authdes_cred NEW: Secure RPC
1595 xdr_authdes_verf NEW: Secure RPC
1596 xdr_cryptkeyarg NEW: Secure RPC
1597 xdr_cryptkeyarg2 NEW: Secure RPC
1598 xdr_cryptkeyres NEW: Secure RPC
1599 xdr_getcredres NEW: Secure RPC
1600 xdr_key_netstarg NEW: Secure RPC
1601 xdr_key_netstres NEW: Secure RPC
1602 xdr_keybuf NEW: Secure RPC
1603 xdr_keystatus NEW: Secure RPC
1604 xdr_netnamestr NEW: Secure RPC
1605 xdr_sizeof NEW: Secure RPC
1606 xdr_unixcred NEW: sunrpc ext
1607 xencrypt NEW: Secure RPC
1608 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1619 * inet_ntoa is thread-safe
1621 * updwtmp is moved from libutil to libc
1623 * rewrite of cbrt function
1625 * update of timezone data
1639 * add atoll function
1641 * fix complex problems in Berkeley DB code
1643 * fix math functions
1647 * fixed lots of header problems (especially Linux/GNU specific)
1649 * dynamic loader preserves all registers
1651 * Roland McGrath provided support for handling of auxiliary objects in
1652 the ELF dynamic loader.
1654 * support for parallel builds is improved
1658 * GNU extensions are no longer declared by default. To enable them you
1659 must define the macro `_GNU_SOURCE' in your program or compile with
1662 * The library has changed from using GNU ld symbol aliases to using weak
1663 symbols where available. The ELF object file format supports weak
1664 symbols; GNU ld also supports weak symbols in the a.out format. (There
1665 is also now support for other GNU ld extensions in ELF. Use the
1666 `--with-elf' option to configure to indicate you have ELF, and
1667 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1668 of many files which contained only symbol aliases, reducing the size of
1669 the source and the compiled library; many other files were renamed to
1670 less cryptic names previously occupied by the symbol alias files.
1671 There is a new header file <elf.h> for programs which operate on
1672 files in the ELF format.
1674 * Converted to Autoconf version 2, so `configure' has more options.
1675 Run `configure --help' to see the details.
1677 * The library can now be configured to build profiling, highly-optimized
1678 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1679 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1680 `configure' enable building these extra libraries. The shared library is
1681 built by default when using both ELF and GNU ld. When shared libraries
1682 are enabled, the new library `-ldl' is available for arbitrary run-time
1683 loading of shared objects; its interface is defined in <dlfcn.h>. The
1684 new header file <link.h> gives access to the internals of the run-time
1685 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1686 application of same name on other systems and it provides information
1687 about dynamically linked binaries.
1689 * The C library now provides the run-time support code for profiling
1690 executables compiled with `-pg'. Programs can control the profiling code
1691 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1692 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1693 the support for this file format was contributed by David Mosberger-Tang.
1695 * The math code has been replaced with a math library based on fdlibm from
1696 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1697 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1698 functions. The math functions now reside in a separate library, so
1699 programs using them will need to use `-lm' their linking commands.
1701 * John C. Bowman contributed optimized ix87 assembler inline functions.
1703 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1704 mechanism similar to that found in Solaris 2. This is now used for the
1705 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1706 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1707 file controls what services are used for each individual database. This
1708 works by loading shared libraries with names specified in `nsswitch.conf',
1709 so service modules can be changed or added at any time without even
1710 relinking any program. Currently there are the file, db, and NIS based
1711 NSS services available.
1713 * The new functions `strtoq' and `strtouq' parse integer values from
1714 strings, like `strtol' and `strtoul', but they return `long long int' and
1715 `unsigned long long int' values, respectively (64-bit quantities).
1717 * The new functions `strtof' and `strtold' parse floating-point values from
1718 strings, like `strtod', but they return `float' and `long double' values,
1719 respectively (on some machines `double' and `long double' are the same).
1721 * Ulrich Drepper has contributed new implementations of the floating-point
1722 printing and reading code used in the `printf' family of functions and
1723 `strtod', `strtof', and `strtold'. These new functions are perfectly
1724 accurate, and much faster than the old ones.
1726 * The implementation of the POSIX locale model was completely rewritten by
1727 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1728 to compile the POSIX locale definition.
1730 * The former dummy implementations of the strcoll and strxfrm function are
1731 now replaced by fully functional code contributed by Ulrich Drepper. The
1732 collation information comes from the POSIX locale definitions.
1734 * The new header <langinfo.h> defines an interface for accessing
1735 various locale-dependent data (using the locale chosen with `setlocale').
1737 * Ulrich Drepper has contributed a new suite of functions for operation on
1738 wide-character and multibyte-character strings, in <wchar.h>;
1739 and classification and case conversion of wide characters, in <wctype.h>.
1740 These new functions are conforming to the ISO C, Amendement 1 specification.
1742 * There is now a second implementation of the standard I/O library available.
1743 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1744 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1746 * You can now use positional parameter specifications in format strings
1747 for the `printf' and `scanf' families of functions. For example,
1748 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1749 ``Number 6, Mr Jones''. This is mainly useful when providing different
1750 format strings for different languages, whose grammars may dictate
1751 different orderings of the values being printed. To support this
1752 feature, the interface for `register_printf_handler' has changed; see
1753 the header file <printf.h> for details.
1755 * The `printf' and `scanf' families of functions now understand a new
1756 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1757 to group numbers as indicated by the locale; for `scanf' and friends, this
1758 says to accept as valid only a number with all the proper grouping
1759 separators in the right places. In the default "C" locale, numbers are
1760 not grouped; but locales for specific countries will define the usual
1761 conventions (i.e. separate thousands with `,' in the US locale).
1763 * The pgrp functions have been regularized, slightly incompatibly but much
1764 less confusingly. The core functions are now `getpgid' and `setpgid',
1765 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1766 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1767 provided for compatibility. There is no longer an incompatible `getpgrp'
1768 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1770 * The new header file <fts.h> and suite of functions simplify programs that
1771 operate on directory trees. This code comes from 4.4 BSD.
1773 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1774 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1775 NSS scheme used in glibc.
1777 * There is a new malloc debugging hook `__memalign_hook'.
1779 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1780 `unsigned int' in <sys/types.h>. These are for compatibility only and
1781 their use is discouraged.
1783 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1784 done differently, so that it works even without GNU ld.
1786 * New function `euidaccess' checks allowed access to a file like `access',
1787 but using the effective IDs instead of the real IDs.
1789 * The time zone data files have been updated for the latest and greatest
1790 local time conventions of the countries of the world.
1792 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1795 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1796 for formatting floating-point numbers. They are provided only for
1797 compatibility; new programs should use `sprintf' instead. There are
1798 also equivalent function for the `long double' floating-point type and
1799 all functions also exist in a reentrant form.
1801 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1802 functions for maintaining the login-record files (primarily of use to
1803 system programs such as `login'), and convenient functions for
1804 allocating and initializing a pseudo-terminal (pty) device.
1806 * Ulrich Drepper has contributed new support for System V style
1807 shared memory and IPC on systems that support it.
1809 * Ulrich Drepper has contributed several miscellaneous new functions found
1810 in System V: The `hsearch' family of functions provide an effective
1811 implementation of hash tables; `a64l' and `l64a' provide a very simple
1812 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1815 * Ulrich Drepper has contributed new reentrant counterparts for the
1816 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1818 * Ulrich Drepper has contributed new, highly-optimized versions of several
1819 string functions for the i486/Pentium family of processors.
1821 * Ulrich Drepper has updated the Linux-specific code, based largely
1822 on work done in Hongjiu Lu's version of GNU libc for Linux.
1823 The GNU library now supports Linux versions 2.0.10 and later,
1824 using the ELF object file format (i[3456]86-*-linux).
1826 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1828 * David Mosberger-Tang and Richard Henderson have ported the C library
1829 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1830 dynamic linking support for ELF/Alpha.
1832 * Richard Henderson contributed several Alpha optimized assembler function
1833 for arithmetic and string handling.
1835 * Ulrich Drepper has contributed a new set of message catalog functions to
1836 support multiple languages using the <libintl.h> interface, for use with
1837 his new package GNU gettext. Translation volunteers have contributed
1838 catalogs of the library's messages in Spanish, German, and Korean.
1840 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1841 program and the `catgets' function for reading the catalog files it
1842 creates. (The <libintl.h> interface is preferred; we include the
1843 <nl_types.h> interface using `catgets' only for source compatibility with
1844 programs already written to use it.)
1846 * New header file <values.h> gives SVID-compatible names for <limits.h>
1849 * Various new macros, declarations, and small header files for compatibility
1852 * New function `group_member' is a convenient way to check if a process has
1853 a given effective group ID.
1855 * When using GCC 2.7 and later, the socket functions are now declared in a
1856 special way so that passing an argument of type `struct sockaddr_in *',
1857 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1858 `struct sockaddr *' type, does not generate a type-clash warning.
1860 * New function `error' declared in header file <error.h> is a convenient
1861 function for printing error messages and optionally exiting; this is the
1862 canonical function used in GNU programs. The new functions `err', `warn',
1863 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1864 doing the same thing.
1866 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1867 POSIX.2 `glob' function to do ~ and {...} expansion.
1869 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1870 `clearenv' which is used in POSIX.9 is also available.
1872 * New function `getsid' returns session ID number on systems that support it.
1874 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1875 files <db.h> and <mpool.h> provide a rich set of functions for several
1876 types of simple databases stored in memory and in files, and <ndbm.h> is
1877 an old `ndbm'-compatible interface using the `db' functions. Link with
1878 `-ldb' to get these functions.
1880 * New macro `strdupa' copies a string like `strdup', but uses local stack
1881 space from `alloca' instead of dynamic heap space from `malloc'.
1883 * New function `strnlen' is like `strlen' but searches only a given maximum
1884 number of characters for the null terminator. `stpncpy', `strndup' and
1885 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1888 * New function `statfs' in header <sys/statfs.h>.
1890 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1891 provide convenient functions for operating on blocks of null-terminated
1894 * A new suite of functions in <utmp.h> handle all the details of reading
1895 and writing the utmp file.
1897 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1900 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1901 completely POSIX compliant and also implemented the extended functionality
1902 to handle alternate digit representation and alternate era date formats.
1904 * Ulrich Drepper provided an implementation of the `strptime' function
1905 defined in XPG4.2 which transforms a string into a `struct tm' value.
1907 * Paul Eggert provided the tzselect shell script as part of the timezone
1908 code. The shell script makes it easy to select the correct timezone
1911 * The implementation of the malloc family of functions is completely replaced
1912 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1913 The implementation uses the mmap function (if available) and it is
1914 optimized for the use in multi threaded programs.
1916 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1917 functions. This new functionality is usable by specifying a special
1918 salt string and it is compatible with implementation on *BSD systems.
1920 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1921 `getsubopt' to handle second level command line options, `bsd_signal'
1922 to access BSD style `signal' functionality, the obsolete `regexp' style
1925 * the `lchown' function is available on system which support this
1928 * The implementation of the shadow password handling function was contributed
1931 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1933 * POSIX.1g support was added. The <sys/select.h> header is available,
1934 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1935 implementation of `getaddrinfo'.
1939 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1941 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1942 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1944 * The new function `daemon' from 4.4 BSD is useful for server programs that
1945 want to put themselves in the background.
1947 * Joel Sherrill has contributed support for several standalone boards that
1948 run without an operating system.
1950 * `printf', `scanf' and friends now accept a `q' type modifier for long
1951 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1953 * All of the code taken from BSD (notably most of the math and networking
1954 routines) has been updated from the BSD 4.4-Lite release.
1956 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1958 * The new functions `getdomainname' and `setdomainname' fetch or change the
1959 YP/NIS domain name. These are system calls which exist on systems which
1962 * The time zone data files have been updated for the latest international
1965 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1966 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1970 * The C library now includes support for Sun RPC, from Sun's free
1971 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1972 are included. (There is still no support for YP.)
1974 * Tom Quinn has contributed a port of the C library to SGI machines running
1975 Irix 4 (mips-sgi-irix4).
1977 * The new `lockf' function is a simplified interface to the locking
1978 facilities of `fcntl', included for compatibility.
1980 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1982 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1984 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1987 * The error message printed by `assert' for a failed assertion now includes
1988 the name of the program (if using GNU ld) and the name of the calling
1989 function (with versions of GCC that support this).
1991 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1993 * The library now includes the <sys/mman.h> header file and memory
1994 management functions `mmap', `munmap', `mprotect', `msync', and
1995 `madvise', on systems that support those facilities.
1997 * The interface for `mcheck' has changed slightly: the function called to
1998 abort the program when an allocation inconsistency is detected now takes
1999 an argument that indicates the type of failure. The new function
2000 `mprobe' lets you request a consistency check for a particular block at
2001 any time (checks are normally done only when you call `free' or `realloc'
2004 * It is now possible to easily cross-compile the C library, building on one
2005 system a library to run on another machine and/or operating system. All
2006 you need to do is set the variable `HOST_CC' in `configparms' to the
2007 native compiler for programs to run on the machine you are building on (a
2008 few generator programs are used on Unix systems); set `CC' to the
2011 * The new function `fexecve' (only implemented on the GNU system) executes
2012 a program file given a file descriptor already open on the file.
2016 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2017 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2019 * You can set the variable `libprefix' in `configparms' to specify a prefix
2020 to be prepended to installed library files; this makes it easy to install
2021 the GNU C library to be linked as `-lgnuc' or whatever.
2023 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2024 copies a limited number of characters from a string, and returns the
2025 address of the last character written.
2027 * You no longer need to check for whether the installed `stddef.h' is
2028 compatible with the GNU C library. configure now checks for you.
2030 * You can now define a per-stream `fileno' function to convert the
2031 stream's cookie into an integral file descriptor.
2033 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2034 allocates zero bytes of storage, and returns a unique pointer which
2035 you can pass to `realloc' or `free'. The behavior is undefined if
2036 you dereference this pointer.
2038 * The C library now runs on Sony NEWS m68k machines running either
2039 NewsOS 3 or NewsOS 4.
2041 * The new `syscall' function is a system-dependent primitive function
2042 for invoking system calls. It has the canonical behavior on Unix
2043 systems, including unreliable return values for some calls (such as
2044 `pipe', `fork' and `getppid').
2046 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2047 to `EAGAIN', which is the preferred name. On systems whose kernels
2048 use two distinct codes, the C library now translates EWOULDBLOCK to
2049 EAGAIN in every system call function.
2053 * The GNU C Library Reference Manual is now distributed with the library.
2054 `make dvi' will produce a DVI file of the printed manual.
2055 `make info' will produce Info files that you can read on line using C-h i
2056 in Emacs or the `info' program.
2057 Please send comments on the manual to bug-glibc-manual@gnu.org.
2059 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2061 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2063 * Jason Merrill has contributed a port to the Sequent Symmetry running
2064 Dynix version 3 (i386-sequent-dynix).
2066 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2067 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2069 * New function `memory_warnings' lets you arrange to get warnings when
2070 malloc is running out of memory to allocate, like Emacs gives you.
2072 * The C library now contains the relocating allocator used in Emacs 19 for
2073 its editing buffers. This allocator (ralloc) minimizes allocation
2074 overhead and fragmentation by moving allocated regions around whenever it
2075 needs to. You always refer to a ralloc'd region with a "handle" (a
2076 pointer to a pointer--an object of type `void **').
2078 * There is a new `printf' format: `%m' gives you the string corresponding
2079 to the error code in `errno'.
2081 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2082 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2083 pass, the `a' modifier says to fill in a `char **' you pass with a
2086 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2087 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2088 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2090 * `mkstemp' is a traditional Unix function to atomically create and open a
2091 uniquely-named temporary file.
2095 * The standard location for the file that says what the local timezone is
2096 has changed again. It is now `/usr/local/etc/localtime' (or more
2097 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2099 * The distribution no longer contains any files with names longer than 14
2102 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2103 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2105 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2109 * The configuration process has changed quite a bit. The `configure'
2110 script is now used just like the configuration scripts for other GNU
2111 packages. The `sysdeps' directory hierarchy is much rearranged.
2112 The file `INSTALL' explains the new scheme in detail.
2114 * The header files no longer need to be processed into ANSI C and
2115 traditional C versions. There is just one set of files to install, and
2116 it will work with ANSI or old C compilers (including `gcc -traditional').
2118 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2119 MIPS DECStation running Ultrix 4.
2121 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2122 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2123 made itself into a shared library.
2125 * Yet further improved support for the i386, running 4.3 BSD-like systems
2126 (such as Mach 3 with the Unix single-server), or System V.
2128 * New function `strncasecmp' to do case-insensitive string comparison
2129 with limited length.
2131 * New function `strsep' is a reentrant alternative to `strtok'.
2133 * New functions `scandir' and `alphasort' for searching directories.
2135 * New function `setenv' is a better interface to `putenv'.
2137 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2138 function for traversing a directory tree.
2140 * The GNU obstack package is now also part of the C library.
2141 The new function `open_obstack_stream' creates a stdio stream that
2142 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2143 formatted output directly to an obstack.
2145 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2146 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2148 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2150 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2151 things to your strings.
2153 * There are some new test programs: test-fseek, testmb, and testrand.
2155 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2156 These ports are not finished, but are a good starting place for really
2157 supporting those systems.
2159 * `/etc/localtime' is now the standard location for the file that says what
2160 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2161 This follows the general principle that `/etc' is the place for all local
2162 configuration files.
2164 * The C library header files now use `extern "C"' when used by the C++
2165 compiler, so the C library should now work with C++ code.
2167 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2168 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2171 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2172 function which uses the `merge sort' algorithm, and is said to be
2173 significantly faster than the old GNU `qsort' function. Merge sort is
2174 now the standard `qsort' function. The new algorithm can require a lot
2175 of temporary storage; so, the old sorting function is called when the
2176 required storage is not available.
2178 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2179 provides the Unix `crypt' function, plus some other entry points.
2181 * The code and header files taken from 4.4 BSD have been updated with the
2182 latest files released from Berkeley.
2184 ----------------------------------------------------------------------
2185 Copyright information:
2187 Copyright (C) 1992-2012 Free Software Foundation, Inc.
2189 Permission is granted to anyone to make or distribute verbatim copies
2190 of this document as received, in any medium, provided that the
2191 copyright notice and this permission notice are preserved,
2192 thus giving the recipient permission to redistribute in turn.
2194 Permission is granted to distribute modified versions
2195 of this document, or of portions of it,
2196 under the above conditions, provided also that they
2197 carry prominent notices stating who last changed them.
2200 version-control: never
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