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://sources.redhat.com/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 3479, 5400, 6778, 6808, 9685, 9914, 11607, 13412, 13717, 13696, 13939,
13 13966, 14042, 14090, 14166, 14150, 14151, 14154, 14157, 14166, 14173,
14 14195, 14252, 14283, 14298, 14303, 14307, 14328, 14331, 14336, 14337,
15 14347, 14349, 14459, 14476, 14505, 14516, 14519, 14532, 14538
17 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
18 Optimized versions of memcpy, memset, and memcmp added for System z10 and
20 Implemented by Andreas Krebbel.
22 * The new function secure_getenv allows secure access to the environment,
23 returning NULL if running in a SUID/SGID process. This function replaces
24 the internal function __secure_getenv.
26 * SystemTap static probes have been added into the dynamic linker.
27 Implemented by Gary Benson.
29 * Optimizations of string functions strstr, strcasestr and memmem.
30 Implemented by Maxim Kuvyrkov.
32 * The minimum Linux kernel version that this version of the GNU C Library
33 can be used with is 2.6.16.
35 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
36 powerpc POWER7. Implemented by Will Schmidt.
38 * New configure option --disable-nscd builds the C library such that it
39 never attempts to contact the Name Service Caching Daemon (nscd).
40 New configure option --disable-build-nscd avoids building nscd itself;
41 this is the default if --disable-nscd is used.
43 * The ttyname and ttyname_r functions on Linux now fall back to searching for
44 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
45 allows creation of chroots without the procfs mounted on /proc.
50 * The following bugs are resolved with this release:
52 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
53 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
54 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
55 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
56 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
57 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
58 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
59 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
60 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
61 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
62 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
63 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
64 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
65 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
66 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
67 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
68 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
69 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
70 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
71 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
72 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
73 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
76 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
77 configuring glibc with:
78 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
79 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
80 Implemented by H.J. Lu.
84 + define static_assert
88 + declare at_quick_exit and quick_exit also for ISO C11
90 + aligned_alloc. NB: The code is deliberately allows the size parameter
91 to not be a multiple of the alignment. This is a moronic requirement
92 in the standard but it is only a requirement on the caller, not the
97 + uchar.h support added
99 + CMPLX, CMPLXF, CMPLXL added
101 Implemented by Ulrich Drepper.
103 * Support for the IA-64 has been moved to ports.
105 * Remove support for anything but ELF binary format
107 * Checking versions of poll, ppoll added.
108 Implemented by Ulrich Drepper.
110 * More generic and 64-bit performance optimizations to math functions.
111 Implemented by Ulrich Drepper.
113 * New configure option --enable-obsolete-rpc makes the deprecated RPC
114 headers and functions available at compile time as they were before
115 version 2.14. This option will be removed at some time in the future
116 after the TI-RPC library becomes fully sufficient for the needs of
117 existing applications.
119 * Compatibility code for Linux kernel versions before 2.4 has been removed.
120 Note that glibc is not expected to work with any Linux kernel version
123 * New header <sys/auxv.h> and function getauxval allowing easy access to
124 the AT_* key-value pairs passed from the Linux kernel. The header also
125 defines the HWCAP_* bits associated with the AT_HWCAP key.
127 * New locales: mag_IN
129 * New configure option --enable-systemtap builds SystemTap static probes
130 into libc for setjmp and longjmp and into libpthread for various operations.
131 So far the setjmp/longjmp probes and some of the libpthread probes are
132 provided only for i*86 and x86_64.
133 Implemented by Roland McGrath and Rayson Ho.
135 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
137 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
140 * More optimized functions for SPARC. Implemented by David S. Miller.
142 * Improved support for cross-compilation, especially bootstrap builds
143 without a previously built glibc.
145 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
146 Chris Metcalf from Tilera.
148 * Support for the old ARM ABI has been removed from ports. Only the EABI is
149 now supported for ARM processors.
151 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
152 as the name of the dynamic linker, to distinguish it from the
153 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
155 * Support for CRIS has been removed from ports.
157 * A new class of installed header has been documented for low-level
158 platform-specific functionality. PowerPC added the first instance with a
159 function to provide time base register access. Contributed by Tulio
160 Magno Quites Machado Filho.
162 * ix86 configurations now install header files that are consistent with
163 what x86-64 configurations install. These same header files can be used
164 for -m32, -m64, or -mx32 builds.
165 Contributed by H.J. Lu.
167 * Math library bug fixes. A thorough audit of all open math library bugs was
168 conducted by Joseph Myers. Significant progress was made on many math
169 library bugs resulting in more accurate exceptions and function results.
170 Many thanks to all those that contributed including Andreas Jaeger for his
171 patch review and work on the x87 trigonometric instruction issues.
173 * Timezone data is no longer installed. Timezone-related binaries and scripts
174 will continue to be installed. Users should obtain their timezone data from
175 their distribution provider or from the tzdata package at
176 <ftp://munnari.oz.au/pub/>.
180 * The following bugs are resolved with this release:
182 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
183 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
184 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
185 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
186 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
187 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
188 13484, 13506, 13515, 13523, 13524, 13538, 13540
190 * New program pldd to list loaded object of a process
191 Implemented by Ulrich Drepper.
193 * Add nss_db support back to glibc. No more dependency on Berkeley db
194 and support for initgroups lookups.
195 Implemented by Ulrich Drepper.
197 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
198 Contributed by HJ Lu.
200 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
201 Contributed by HJ Lu.
203 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
204 on x86-32 and x86-64.
205 Contributed by Liubov Dmitrieva.
207 * Optimized strchr and strrchr for SSE on x86-32.
208 Contributed by Liubov Dmitrieva.
210 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
211 for x86-64 and x86-32.
212 Contributed by Liubov Dmitrieva.
214 * New interfaces: scandirat, scandirat64
215 Implemented by Ulrich Drepper.
217 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
218 Implemented by Ulrich Drepper.
220 * nscd now also caches the netgroup database.
221 Implemented by Ulrich Drepper.
223 * Integrate libm with gcc's -ffinite-math-only option.
224 Implemented by Ulrich Drepper.
226 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
227 to math functions. Implemented by Ulrich Drepper.
229 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
230 Implemented by Ulrich Drepper.
232 * New Linux interfaces: process_vm_readv, process_vm_writev
234 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
235 Implemented by Ulrich Drepper.
237 * Optimized nearbyint and strcasecmp for PPC.
238 Implemented by Adhemerval Zanella.
240 * New locales: bho_IN, unm_US, es_CU, ta_LK
244 * The following bugs are resolved with this release:
246 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
247 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
248 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
249 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
250 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
251 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
252 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
253 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
254 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
255 12795, 12811, 12813, 12814, 12841
257 * The RPC implementation in libc is obsoleted. Old programs keep working
258 but new programs cannot be linked with the routines in libc anymore.
259 Programs in need of RPC functionality must be linked against TI-RPC.
260 The TI-RPC implementation is IPv6 enabled and there are other benefits.
262 Visible changes of this change include (obviously) the inability to link
263 programs using RPC functions without referencing the TI-RPC library and the
264 removal of the RPC headers from the glibc headers.
265 Implemented by Ulrich Drepper.
267 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
268 syncfs, setns, sendmmsg
270 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
271 yue_HK, lij_IT, mhr_RU
273 * New encodings: CP770, CP771, CP772, CP773, CP774
275 * New program sotruss to trace calls through PLTs
276 Implemented by Ulrich Drepper.
278 * The malloc hook implementation is marked deprecated and will be removed
279 from the default implementation in the next version. The design never
280 worked ever since the introduction of threads. Even programs which do
281 not create threads themselves can use multiple threads created internally.
285 * The following bugs are resolved with this release:
287 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
288 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
289 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
290 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
293 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
295 * POWER7 optimizations: memset, memcmp, strncmp
297 * New optimized string functions for x86-64: strnlen (SSE2),
298 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
299 Implemented by Ulrich Drepper.
303 * The following bugs are resolved with this release:
305 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
306 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
307 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
308 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
309 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
310 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
311 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
312 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
314 * New interfaces: pthread_getname_np, pthread_setname_np
316 * New Linux interface: recvmmsg
318 * STT_GNU_IFUNC implemented for Sparc by David Miller.
320 * The dynamic linker now recognizes supported ABI versions from the
321 EI_ABIVERSION field in the ELF header.
322 Implemented by Ulrich Drepper.
324 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
325 will not be used to fill in password fields in the passwd.byname replies.
326 Instead it is used to synthesize the shadow.byname table, should it be
327 missing. This is a useful mode in some installations involving Solaris.
328 Implemented by Ulrich Drepper.
330 * New locales: kok_IN, sq_MK, cv_RU
334 * The following bugs are resolved with this release:
336 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
337 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
338 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
339 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
340 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
341 10789, 10817, 10823, 10840, 10847
343 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
345 Implemented by Ulrich Drepper.
347 * Checking version of longjmp added that fails if an uninitialized stack
348 frame would be created. Implemented by Ulrich Drepper.
350 * STT_GNU_IFUNC is now supported in static executables.
351 Implemented by H.J. Lu.
353 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
355 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
356 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
357 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
358 Contributed by H.J. Lu.
360 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
361 Implemented by Ulrich Drepper.
363 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
365 Contributed by H.J. Lu.
367 * Support for fma instruction in AVX on x86-64.
368 Implemented by H.J. Lu and Ulrich Drepper.
370 * AVX support in x86-64 auditing support in ld.so.
371 Implemented by H.J. Lu.
373 * STB_GNU_UNIQUE support added.
374 Implemented by Ulrich Drepper.
376 * Implement second fallback mode for optimized DNS lookup for even more
377 broken environments. If two requests from the same port are not
378 handled correctly close the socket and open a new one before sending
379 the second request. The 'single-request-reopen' option in /etc/resolv.conf
380 can be used to select this mode right away, instead of rediscovering the
381 necessity is every process again.
382 Implemented by Ulrich Drepper.
384 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
385 Implemented by Adam Tkac.
387 * Optimized iconv conversions for S390x.
388 Implemented by Andreas Krebbel.
390 * Using condvars with PI mutexes is now more efficient due to kernel
391 support for requeueing to PI futexes. NPTL support added for x86-64.
392 Implemented by Ulrich Drepper.
394 * New locales: ps_AF, my_MM
398 * The following bugs are resolved with this release:
400 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
401 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
402 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
403 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
404 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
406 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
407 Implemented by Ulrich Drepper.
409 * New Linux interfaces: accept4, fallocate, fallocate64.
410 Implemented by Ulrich Drepper.
412 * Correct declarations of string function when used in C++ code. This
413 could lead to compile errors for invalid C++ code.
415 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
418 * New POSIX 2008 interface: psiginfo
419 Implemented by Ulrich Drepper.
421 * New ISO C++1x interfaces: quick_exit, at_quick_exit
422 Implemented by Ulrich Drepper.
424 * Support for selecting between multiple function definitions at runtime
425 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
427 * The libcrypt library can now use the hash function implementations in
428 NSS. Implemented by Ulrich Drepper.
430 * The malloc implementation can be compiled to be less memory efficient
431 but higher performing in multi-threaded programs.
432 Implemented by Ulrich Drepper.
434 * New locales: nan_TW@latin, ks_IN
436 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
437 Implemented by Ulrich Drepper.
439 * Extended printf hook support. It is possible to use user-defined types
440 and extend existing format specifiers.
441 Implemented by Ulrich Drepper.
443 * Handling for group shadow files has been added.
444 Implemented by Ulrich Drepper.
446 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
447 servers (the case, e.g., for some people using the built-in DNS
448 server in ADSL modems/routers). There is a once-per-process timeout
449 in case of a broken server. To avoid it, users can run nscd or put
450 'options single-request' in /etc/resolv.conf.
451 Implemented by Ulrich Drepper.
455 * The following bugs are resolved with this release:
457 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
458 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
459 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
460 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
461 6968, 6974, 6980, 6995, 7008, 7009, 7029
463 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
464 up at the same time. Implemented by Ulrich Drepper.
466 * TLS descriptors for LD and GD on x86 and x86-64.
467 Implemented by Alexandre Oliva.
469 * getaddrinfo now handles DCCP and UDPlite.
470 Implemented by Ulrich Drepper.
472 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
473 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
474 Implemented by Ulrich Drepper.
476 * New implementation of memmem, strstr, and strcasestr which is O(n).
477 Implemented by Eric Blake.
479 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
481 * Implement "e" option for popen to open file descriptor with the
482 close-on-exec flag set. Implemented by Ulrich Drepper.
484 * Implement "b" mode for fmemopen. In this mode writes writes don't
485 implicitly add a NUL byte and seeks from the end of the buffer really
486 use the buffer end, not the string length as the basis.
487 Implemented by Ulrich Drepper.
489 * Many functions, exported and internal, now atomically set the close-on-exec
490 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
492 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
494 Implemented by Pravin Satpute.
496 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
500 * The following bugs are resolved with this release:
502 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
503 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
504 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
505 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
506 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
507 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
508 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
510 * New locales: bo_CN, bo_IN, shs_CA.
512 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
514 * Sorting rules for some Indian languages (Devanagari and Gujarati).
515 Implemented by Pravin Satpute.
517 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
519 * nscd caches now all timeouts for DNS entries
520 Implemented by Ulrich Drepper.
522 * nscd is more efficient and wakes up less often.
523 Implemented by Ulrich Drepper.
525 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
526 vdprintf, and obstack_vprintf.
527 Implemented by Jakub Jelinek.
529 * Faster memset for x86-64.
530 Implemented by Harsha Jagasia and H.J. Lu.
532 * Faster memcpy on x86.
533 Implemented by Ulrich Drepper.
535 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
536 Implemented by Ulrich Drepper.
538 * Faster sqrt and sqrtf implemention for some PPC variants.
539 Implemented by Steven Munroe.
543 * The following bugs are resolved with this release:
545 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
546 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
547 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
548 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
549 5071, 5103, 5104, 5112, 5113, 5184, 5186
551 * More checking functions: fread, fread_unlocked, open*, mq_open.
552 Implemented by Jakub Jelinek and Ulrich Drepper.
554 * Extend fortification to C++. Implemented by Jakub Jelinek.
556 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
557 by not recognizing 'a' as a modifier when those specs are requested.
558 Implemented by Jakub Jelinek.
560 * PPC optimizations to math and string functions.
561 Implemented by Steven Munroe.
563 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
564 options to be passed. Implemented by Ulrich Drepper.
566 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
568 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
569 Implemented by Ulrich Drepper.
571 * Handle private futexes in the NPTL implementation.
572 Implemented by Jakub Jelinek and Ulrich Drepper.
574 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
575 Implemented by Roland McGrath and Ulrich Drepper.
577 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
579 * SHA-256 and SHA-512 based password encryption.
580 Implemented by Ulrich Drepper.
582 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
583 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
586 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
587 Implemented by Ulrich Drepper.
591 * The following bugs are resolved with this release:
593 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
594 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
595 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
596 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
597 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
598 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
599 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
602 * New Linux interfaces: epoll_pwait, sched_getcpu.
604 * New generic interfaces: strerror_l.
606 * nscd can now cache the services database. Implemented by Ulrich Drepper.
610 * The following bugs are resolved with this release:
612 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
613 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
614 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
615 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
616 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
617 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
618 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
619 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
620 3225, 3251, 3252, 3253, 3273
622 * For Linux, the sorting of addresses returned by getaddrinfo now also
623 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
624 Implemented by Ulrich Drepper.
626 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
627 Implemented by Ulrich Drepper.
629 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
631 * New iconv module for MIK. Contributed by Alexander Shopov.
633 * For sites with broken group and/or passwd database, the auto-propagate
634 option of nscd can prevent creating ID lookup entries from the results
635 of a name lookup and vice versa. This usually is no problem but some
636 site might have problems with the default behavior.
637 Implemented by Ulrich Drepper.
639 * Iterating over entire database in NIS can be slow. With the
640 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
641 to trade time for memory. The entire database will be read at once.
642 Implemented by Ulrich Drepper.
644 * The interfaces introduced in RFC 3542 have been implemented by
647 * Support for the new ELF hash table format was added by Ulrich Drepper.
649 * Support for priority inheritance mutexes added by Jakub Jelinek and
652 * Support for priority protected mutexes added by Jakub Jelinek.
654 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
655 or_IN, csb_PL, fy_NL, sr_ME.
659 * More overflow detection functions.
661 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
662 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
664 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
665 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
666 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
667 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
668 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
669 by Masahide Washizawa.
671 * It is now possible to install audit libraries for the dynamic linker using
672 LD_AUDIT. Implemented by Ulrich Drepper.
674 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
675 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
676 For a libc and libpthread that works well on Linux 2.4 kernels, we
677 recommend using the stable 2.3 branch.
679 * The new function open_wmemstream acts like open_memstream,
680 but uses a wchar_t wide character buffer.
682 * The new function ppoll is an improved version of poll, similar to pselect.
684 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
685 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
686 renameat, unlinkat, linkat, symlinkat, readlinkat.
688 * New Linux kernel system calls: unshare,
689 inotify_init, inotify_add_watch, inotify_rm_watch.
691 * The euidaccess function is now also known by the alias eaccess,
692 for compatibility with some other systems.
694 * Timezone data updated to 2006b version.
698 * The following bugs are resolved with this release:
700 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
701 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
702 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
703 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
704 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
705 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
707 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
709 * As of this release, GCC 4 can be used to compile the C Library.
711 * Timezone data updated to 2005m version.
715 * The following bugs are resolved with this release:
717 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
718 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
719 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
720 777, 787, 821, 822, 823, 825
722 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
726 * Support for RFC 3678. Real implementations exist only for Linux so far.
727 Implemented by Ulrich Drepper.
729 * nscd can now cache entries persistently. Expiring entries are reloaded.
730 For speedups the cache can be shared in memory with client processes.
731 Implemented by Ulrich Drepper.
733 * nscd can now perform SELinux checks.
734 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
736 * getaddrinfo queries are now cached. Canonical name lookup is performed
738 Implemented by Ulrich Drepper.
740 * The nothrow function attribute is used when headers are used by gcc when
741 compiling C code. This can avoid significant amounts of exception
744 * The malloc functions perform more error checking and are stricter when
745 it comes to reacting on errors. The default action is to terminate
746 the process after showing an error message. Implemented by Ulrich Drepper.
748 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
749 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
751 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
752 namespaces using the new function dlmopen(). This feature is of course,
753 like most other dynamic loading functionality, not available in statically
754 linked applications. Implemented by Ulrich Drepper.
756 * Low-overhead boundary checking variants of string and some stdio functions
757 were added. These are to be used in conjunction with a gcc patch by
758 Jakub Jelinek which adds calls to these functions if possible.
759 Implemented by Jakub Jelinek and Ulrich Drepper.
761 * Old code for several operating systems and machine architectures that
762 have not been in working condition in a long time have been removed from
763 the main source tree maintained by the GNU C Library's maintainers.
764 These files are now reside in the separate `ports' source module
765 that is usable as an add-on when building the library.
769 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
770 interrogate the dynamic linker, compatible with the Solaris interface.
772 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
773 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
775 * getifaddrs now uses the netlink interface on Linux to get its information.
776 Implemented by Thorsten Kukuk.
778 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
779 Implemented by Ulrich Drepper.
781 * support for non-executable stacks on x86 has been added. Changes mostly
784 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
787 * getaddrinfo now performs destination address selection according to
792 * Thread-safe interfaces for many functions that access locale data
793 were added in version 2.3, but these features were omitted from NEWS.
794 Many functions have variants with an `_l' suffix that take a `locale_t'
795 object as a parameter rather than consulting the current locale.
796 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
797 create and maintain `locale_t' objects. Additionally, the new function
798 `uselocale' sets "the current locale" (as used by functions not so
799 parameterized) set for an individual thread. These features were added
800 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
802 * The functions getresuid, getresgid, setresuid, and setresgid, which
803 have long been available on Linux, are now declared in <unistd.h>
804 and are now also available on the Hurd.
806 * ELF thread-local storage support (TLS) now works on x86-64.
808 * The new dynamic string token $LIB is expanded in shared library names.
809 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
811 * Aldy Hernandez contributed complete software floating point support for
812 PowerPC machines with no FPU.
814 * fexecve is implemented on Linux.
816 * The `btowc' function should work at least twice as fast due to
817 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
819 * With approriate thread add-ons cancelable functions are now implemented
820 in libc.so as well. No need to call the function in libpthread. This
821 change allowed to finally disable the incorrect and expensive handling
822 of weak definition in ld.so.
824 * Yet more PLT entries in libc.so have been removed. We finally arrived
825 at the bare minimum. Startup times improved appropriately.
827 * Support for the new Linux/x86 system call interface was added. The
828 AT_SYSINFO auxiliary vector entry is recognized and handled.
832 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
835 * iconv (the program and the interface) now accepts empty names (excluding
836 options like //TRANSLIT) to mean "use charset of current locale".
838 * localedef can now transliterate characters in strings which are not in
839 the provided charmap. The information from the input locale is used.
841 * Prelinking support was added for ELF targets. This requires additional
842 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
844 * Read-only stdio streams now use mmap to speed up operation by eliminating
845 copying and buffer underflows. To use add 'm' to the mode string of
846 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
848 * The malloc functions were completely rewritten by Wolfram Gloger based
849 on Doug Lea's malloc-2.7.0.c.
851 * Isamu Hasegawa contributed a completely new and POSIX-conformant
852 implementation of regex.
854 * Bruno Haible upgraded the iconv and locale implementation to support
857 * Contents of the LC_* and LANG environment variables in the CEN style are
858 not recognized anymore. It never was used. Change by Ulrich Drepper.
860 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
861 thread-local storage (TLS) ABI on some platforms.
862 Changes by Ulrich Drepper. SH support by Kaz Kojima.
864 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
865 EUC-JISX0213, and TSCII.
867 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
868 BSD-compatible interface for getting all network interface addresses.
869 Implementation for IPv4 by Roland McGrath.
871 * Loading of locale data is faster due to the introduction of a locale
872 archive. Implemented by Roland McGrath and Ulrich Drepper.
874 * Startup times are significantly reduced by not using exported functions
875 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
878 * Steven Munroe contributed a port to PowerPC64/Linux.
882 * The Hurd now uses the GNU libio implementation of stdio rather than the
883 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
885 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
886 with the same behavior as the Linux system call of the same name.
890 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
891 128-bit long double format.
893 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
894 IBM1161, and IBM1162 charsets.
896 * Andreas Jaeger contributed a port to x86-64/Linux.
898 * Peter Bruin contributed a port to PowerPC/Hurd.
900 * libc functions using I/O streams now can handle wide-oriented streams
903 * optimizations in the dynamic linker. Binaries created by recent binutils
904 versions start up quicker due to reduced time spent on relocations.
906 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
910 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
911 asinh, atanh, j0 for the 128-bit long double format.
913 * Bruno Haible updated all the code handling Unicode in some form to
916 * Speed of regex for single-byte locales is back to previous levels.
917 Patch by Isamu Hasegawa.
919 * Alpha, SPARC, and IA-64 now also using floating stacks.
921 * Startup time of internationalized applications greatly improved through
922 iconv cache. Use iconvconfig to generate the cache file.
923 Contributed by Ulrich Drepper.
925 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
926 severe performance problems. Patch by David Mosberger.
928 * The Hurd port got a lot more functionality like AIO, various stdio
929 extensions, etc. Mainly done by Roland McGrath.
931 * mtrace can now lookup symbols in shared libraries.
935 * Intel's IA-64 math library is largely integrated. It provides fast and
936 accurate implementatations for most basic and standard math functions
937 in float, double, and long double format.
939 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
940 and asin for the 96-bit long double format and asin, log, tan for the
941 128-bit long double format.
943 * The beginning of a last-bit accurate math library by IBM Haifa were added.
944 The basic double functions exist today. Contributed by Abraham Ziv
945 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
946 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
948 * An asynchronous name lookup library was added. The interface is designed
949 after POSIX AIO. The proposal was circulated beforehand to get comments.
950 No negative ones came in. Implemented by Ulrich Drepper.
952 * Port to S390/64bit contributed by Martin Schwidefsky
953 <schwidefsky@de.ibm.com>.
955 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
956 of functions for Linux/IA-64.
958 * The RPC code is now thread safe. Threads can now use the same service
959 of different services at the same time. Patch by Eric Norum
960 <eric.norum@usask.ca> with some help by Ulrich Drepper.
962 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
963 family of functions for Linux/S390.
965 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
966 of functions for Linux/x86.
968 * Port to Linux/CRIS contributed by Axis Communications.
972 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
973 we can now check for namespace violations and missing declarations. The
974 result is that almost all headers are now Unix-compliant (as defined in
975 the upcoming XPG6). The negative side is that some programs might need
976 corrections, too, if they depend on the incorrect form of the headers in
977 previous versions which defined too many symbols and included too many
980 * regex now handles multibyte character sets correctly.
981 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
983 * iconv (the program) does now conform to the upcoming XPG6 and handles
984 charmaps. Instead of the charset names the path of charmaps can be
985 provided and the conversion happens based on this data.
986 Contributed by Ulrich Drepper.
988 * The locale program now provides detailed information about the installed
993 only lists the names of the supported locales
997 provides details such as country, language, and codeset name.
998 Contributed by Ulrich Drepper.
1002 * The gencat program now parses the input file according to the charset
1003 selected by the LC_CTYPE category. This is important for stateful
1004 character sets. To make generating catalogs easier there is a way
1005 to overwrite the charset selected by the locale: before the first
1006 message or $ quote line the catalog can contain a line like
1008 $ codeset=ISO-8859-2
1010 to select the charset (ISO-8859-2 in this case).
1012 Implemented by Shinya Hanataka and Ulrich Drepper.
1014 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1015 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1016 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1018 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1019 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1021 * The LANGUAGE environment variable is now ignored unless the locale is
1022 changed from the default "C" locale.
1024 * The usual bug fixes.
1028 * Greg McGary added runtime support for bounds checking using gcc's
1029 new -fbounded-pointers option. ix86 target is complete. PowerPC
1032 * Thorsten Kukuk added secure mode support to nscd.
1034 * The Berkeley db libraries have been removed.
1036 Related, the nss_db module is now in a separate package since it
1037 obviously requires a database library being available.
1039 * Wide character I/O streams implemented by Ulrich Drepper.
1041 * Functions from the extended socket API added by Ulrich Drepper.
1043 * Functions feenableexcept and fedisableexcept to control the
1044 behaviour of individual exceptions have been added by Andreas Jaeger.
1046 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1048 * The resolver code has been updated from bind 8.2.3-T5B which supports
1049 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1052 This change could in some situations effect backward compatibility. Since
1053 now `_res' is a thread-local instead of a global variable, modifying it
1054 in one thread does not have any effect in other threads.
1056 The resolver library was also extended to allow IPv6 as the transport
1057 protocol for the requests. This work was done by Stig Venaas.
1059 * Compatibility code for K&R C compilers has been removed from the
1060 header files. A ISO C compiler is needed to use the library
1061 (conforming to either C89 or C99 standard).
1063 * Complete rewrite of the localedef program to support multibyte character
1064 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1065 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1066 Implemented by Ulrich Drepper.
1068 Bruno Haible significantly improved the generation and use of the data
1069 structures for the wide character tables.
1071 * Plural handling in gettext implemented by Ulrich Drepper.
1073 * The utmp daemon has been removed.
1075 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1077 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1080 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1082 * POSIX barriers implemented by Kaz Kylheku.
1084 * POSIX spawn function family implemented by Ulrich Drepper.
1086 * POSIX spinlocks are now available.
1088 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1090 * the configure option --enable-kernel=X.Y.Z allows to strip out
1091 compatibility for kernel versions before X.Y.Z. This is currently only
1092 implemented for Linux.
1094 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1095 field sin6_scope_id. This means that all programs using IPv6 should be
1096 recompiled. Don't expect binary compatibility with previous glibc
1099 * various conversion modules for IBM character sets contributed by
1102 * IA-64 port by Jes Sorensen and HJ Lu.
1116 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1118 * New xdr functions are added; some rpc functions are now 64bit clean.
1120 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1122 * Fixed known incompatibilities with glibc 2.0.
1124 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1126 * Optimized a number of functions (especially the ELF dynamic loader).
1128 * Update timezone data files.
1130 * lots of charmaps corrections
1132 * some new locale definitions and charmaps
1137 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1138 conform to POSIX member type requirements. Symbol versions have been
1139 adjusted as needed within the library, and for direct use by applications,
1140 but there is potential for problems if third-party libraries use
1141 struct timeval as part of their interface. This does not present
1142 a problem for X and other "essential" system libraries.
1144 * An additional locale model to support C++ Standard Library locale
1145 model and probably more was implemented by Ulrich Drepper.
1147 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1150 * Miles Bader provided the `argp' function family to support hierachical
1151 command line argument parsing, layered on top of getopt.
1153 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1155 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1158 * scanf recognizes the %a and %A format for scanning floating point numbers.
1160 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1161 information and interfaces for the available integer types.
1163 * about 130 new math functions were added to implement the ISO C9x math
1166 * the new header <complex.h> contains definitions of the complex math
1167 functions from ISO C 9X.
1169 * the new header <tgmath.h> defines generic macros to use complex or
1170 real valued functions.
1172 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1174 * Andreas Jaeger provided a test suite for the math library.
1176 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1178 * Ulrich Drepper added character set conversion functions (iconv).
1180 * Optimized string functions have been added.
1182 * The localedata addon is now part of glibc.
1184 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1186 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1187 daemon for NSS (nscd).
1189 Missing a better place here are some numbers on improvements. Under
1190 Linux 2.1.125 un-tar-ing the kernel sources takes
1194 using local files 12.19s 6.88s 22.91s
1196 using NIS 13.92s 8.91s 26.34s
1198 using NIS & nscd 10.37s 7.34s 25.30s
1200 using NIS+ 27.57s 30.37s 640.46s
1202 using NIS+ & nscd 10.25s 7.83s 26.51s
1204 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1206 Keep in mind that non-namelookup related operations dominate above times.
1207 It was just a common complain that using NIS+ unpacking the kernel is
1210 [1] The old nscd implementation is not available anymore since it was
1211 distributed with glibc up to version 2.0.98 and thus is now replaced.
1213 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1215 * Mark Kettenis provided a Hesiod NSS module.
1217 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1218 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1220 * rcmd can now handle netgroups (Dick Streefland).
1222 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1225 * Support for the IPv6 protocol has been added to the socket API, as per the
1226 latest draft standards.
1228 * Support for Linux 2.2 has been added.
1230 * Interface changes relative to the latest 2.0.x release:
1231 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1232 addseverity NEW: Unix98
1233 alphasort64 NEW: LFS
1234 argp_err_exit_status NEW: argp, GNU ext
1235 argp_error NEW: argp, GNU ext
1236 argp_failure NEW: argp, GNU ext
1237 argp_help NEW: argp, GNU ext
1238 argp_parse NEW: argp, GNU ext
1239 argp_program_bug_address NEW: argp, GNU ext
1240 argp_program_version NEW: argp, GNU ext
1241 argp_program_version_hook NEW: argp, GNU ext
1242 argp_state_help NEW: argp, GNU ext
1243 argp_usage NEW: argp, GNU ext
1244 authdes_create NEW: Secure RPC
1245 authdes_getucred NEW: Secure RPC
1246 authdes_pk_create NEW: Secure RPC
1247 backtrace NEW: GNU ext.
1248 backtrace_symbols NEW: GNU ext.
1249 backtrace_symbols_fd NEW: GNU ext.
1251 cacosf NEW: ISO C 9x
1252 cacosh NEW: ISO C 9x
1253 cacoshf NEW: ISO C 9x
1254 cacoshl NEW: ISO C 9x
1255 cacosl NEW: ISO C 9x
1262 casinf NEW: ISO C 9x
1263 casinh NEW: ISO C 9x
1264 casinhf NEW: ISO C 9x
1265 casinhl NEW: ISO C 9x
1266 casinl NEW: ISO C 9x
1268 catanf NEW: ISO C 9x
1269 catanh NEW: ISO C 9x
1270 catanhf NEW: ISO C 9x
1271 catanhl NEW: ISO C 9x
1272 catanl NEW: ISO C 9x
1273 cbc_crypt NEW: Secure RPC
1277 ccoshf NEW: ISO C 9x
1278 ccoshl NEW: ISO C 9x
1284 cimagf NEW: ISO C 9x
1285 cimagl NEW: ISO C 9x
1286 clearerr_locked REMOVED
1287 clntunix_create NEW: sunrpc ext
1289 clog10 NEW: ISO C 9x
1290 clog10f NEW: ISO C 9x
1291 clog10l NEW: ISO C 9x
1301 cprojf NEW: ISO C 9x
1302 cprojl NEW: ISO C 9x
1304 crealf NEW: ISO C 9x
1305 creall NEW: ISO C 9x
1310 csinhf NEW: ISO C 9x
1311 csinhl NEW: ISO C 9x
1314 csqrtf NEW: ISO C 9x
1315 csqrtl NEW: ISO C 9x
1319 ctanhf NEW: ISO C 9x
1320 ctanhl NEW: ISO C 9x
1322 des_setparity NEW: Secure RPC
1323 ecb_crypt NEW: Secure RPC
1324 endutxent NEW: Unix98
1326 exp10f NEW: ISO C 9x
1327 exp10l NEW: ISO C 9x
1331 fattach NEW: STREAMS
1332 fdetach NEW: STREAMS
1336 feclearexcept NEW: ISO C 9x
1337 fegetenv NEW: ISO C 9x
1338 fegetexceptflag NEW: ISO C 9x
1339 fegetround NEW: ISO C 9x
1340 feholdexcept NEW: ISO C 9x
1342 feraiseexcept NEW: ISO C 9x
1343 ferror_locked REMOVED
1344 fesetenv NEW: ISO C 9x
1345 fesetexceptflag NEW: ISO C 9x
1346 fesetround NEW: ISO C 9x
1347 fetestexcept NEW: ISO C 9x
1348 feupdateenv NEW: ISO C 9x
1349 fflush_locked REMOVED
1353 fgets_unlocked NEW: GNU ext.
1354 fileno_locked REMOVED
1366 fputc_locked REMOVED
1367 fputs_unlocked NEW: GNU ext.
1368 fread_unlocked NEW: GNU ext.
1373 fstatvfs NEW: Unix98
1377 ftruncate64 NEW: LFS
1379 fwrite_unlocked NEW: GNU ext.
1380 gai_strerror NEW: IPv6
1384 getchar_locked REMOVED
1386 getdate_err NEW: Unix98
1387 getdate_r NEW: GNU ext.
1389 getnameinfo NEW: IPv6
1390 getnetname NEW: Secure RPC
1391 getpmsg NEW: STREAMS
1392 getpt NEW: Unix98 PTY
1393 getrlimit64 NEW: LFS
1394 getutxent NEW: Unix98
1395 getutxid NEW: Unix98
1396 getutxline NEW: Unix98
1397 glob64 NEW: GNU ext.
1398 globfree64 NEW: GNU ext.
1399 gnu_get_libc_release NEW: GNU ext.
1400 gnu_get_libc_version NEW: GNU ext.
1401 grantpt NEW: Unix98 PTY
1402 host2netname NEW: Secure RPC
1404 iconv_close NEW: iconv
1405 iconv_open NEW: iconv
1406 if_freenameindex NEW: IPv6
1407 if_indextoname NEW: IPv6
1408 if_nameindex NEW: IPv6
1409 if_nametoindex NEW: IPv6
1410 in6addr_any NEW: IPv6
1411 in6addr_loopback NEW: IPv6
1412 inet6_isipv4mapped NEW: IPv6
1413 isastream NEW: STREAMS
1414 iswblank NEW: GNU ext.
1415 key_decryptsession NEW: Secure RPC
1416 key_decryptsession_pk NEW: Secure RPC
1417 key_encryptsession NEW: Secure RPC
1418 key_encryptsession_pk NEW: Secure RPC
1419 key_gendes NEW: Secure RPC
1420 key_get_conv NEW: Secure RPC
1421 key_secretkey_is_set NEW: Secure RPC
1422 key_setnet NEW: Secure RPC
1423 key_setsecret NEW: Secure RPC
1424 llrint NEW: ISO C 9x
1425 llrintf NEW: ISO C 9x
1426 llrintl NEW: ISO C 9x
1427 llround NEW: ISO C 9x
1428 llroundf NEW: ISO C 9x
1429 llroundl NEW: ISO C 9x
1434 lrintf NEW: ISO C 9x
1435 lrintl NEW: ISO C 9x
1436 lround NEW: ISO C 9x
1437 lroundf NEW: ISO C 9x
1438 lroundl NEW: ISO C 9x
1440 makecontext NEW: Unix98
1441 mempcpy NEW: GNU ext.
1444 modify_ldt NEW: kernel
1448 nearbyint NEW: ISO C 9x
1449 nearbyintf NEW: ISO C 9x
1450 nearbyintl NEW: ISO C 9x
1451 netname2host NEW: Secure RPC
1452 netname2user NEW: Secure RPC
1453 nexttoward NEW: ISO C 9x
1454 nexttowardf NEW: ISO C 9x
1455 nexttowardl NEW: ISO C 9x
1459 passwd2des NEW: Secure RPC
1461 pow10f NEW: GNU ext.
1462 pow10l NEW: GNU ext.
1465 printf_size NEW: GNU ext.
1466 printf_size_info NEW: GNU ext.
1467 profil_counter REMOVED
1468 pthread_mutexattr_getkind_np REPLACED
1469 pthread_mutexattr_setkind_np REPLACED
1470 ptsname NEW: Unix98 PTY
1471 ptsname_r NEW: Unix98 PTY
1473 putchar_locked REMOVED
1474 putgrent NEW: GNU ext.
1476 putpmsg NEW: STREAMS
1477 pututxline NEW: Unix98
1481 readdir64_r NEW: LFS
1482 remquo NEW: ISO C 9x
1483 remquof NEW: ISO C 9x
1484 remquol NEW: ISO C 9x
1486 roundf NEW: ISO C 9x
1487 roundl NEW: ISO C 9x
1489 scalbln NEW: ISO C 9x
1490 scalblnf NEW: ISO C 9x
1491 scalblnl NEW: ISO C 9x
1493 sendfile NEW: kernel
1494 setcontext NEW: Unix98
1495 setrlimit64 NEW: LFS
1496 setutxent NEW: Unix98
1498 sigignore NEW: Unix98
1499 sigqueue NEW: POSIX.1b
1500 sigrelse NEW: Unix98
1501 sigset NEW: POSIX.1b
1502 sigtimedwait NEW: POSIX.1b
1503 sigwaitinfo NEW: POSIX.1b
1504 sincos NEW: GNU ext.
1505 sincosf NEW: GNU ext.
1506 sincosl NEW: GNU ext.
1510 strcasestr NEW: GNU ext.
1511 strtoimax NEW: ISO C 9x
1512 strtoumax NEW: ISO C 9x
1513 strverscmp NEW: GNU ext.
1514 svcauthdes_stats NEW: Secure RPC
1515 svcunix_create NEW: sunrpc etx
1516 svcunixfd_create NEW: sunrpc ext
1517 swapcontext NEW: Unix98
1518 tcgetsid NEW: Unix98 PTY
1519 tdestroy NEW: GNU ext.
1520 tgamma NEW: ISO C 9x
1521 tgammaf NEW: ISO C 9x
1522 tgammal NEW: ISO C 9x
1526 truncf NEW: ISO C 9x
1527 truncl NEW: ISO C 9x
1529 unlockpt NEW: Unix98 PTY
1530 updwtmpx NEW: Unix98
1531 user2netname NEW: Secure RPC
1532 utmpxname NEW: Unix98
1533 versionsort NEW: GNU ext.
1534 versionsort64 NEW: GNU ext.
1536 wcscasecmp NEW: GNU ext.
1537 wcsncasecmp NEW: GNU ext.
1538 wcsnlen NEW: GNU ext.
1539 wcstoimax NEW: ISO C 9x
1540 wcstoll NEW: ISO C 9x
1541 wcstoull NEW: ISO C 9x
1542 wcstoumax NEW: ISO C 9x
1544 wordexp NEW: POSIX.2
1545 wordfree NEW: POSIX.2
1546 write_profiling REMOVED
1547 xdecrypt NEW: Secure RPC
1548 xdr_authdes_cred NEW: Secure RPC
1549 xdr_authdes_verf NEW: Secure RPC
1550 xdr_cryptkeyarg NEW: Secure RPC
1551 xdr_cryptkeyarg2 NEW: Secure RPC
1552 xdr_cryptkeyres NEW: Secure RPC
1553 xdr_getcredres NEW: Secure RPC
1554 xdr_key_netstarg NEW: Secure RPC
1555 xdr_key_netstres NEW: Secure RPC
1556 xdr_keybuf NEW: Secure RPC
1557 xdr_keystatus NEW: Secure RPC
1558 xdr_netnamestr NEW: Secure RPC
1559 xdr_sizeof NEW: Secure RPC
1560 xdr_unixcred NEW: sunrpc ext
1561 xencrypt NEW: Secure RPC
1562 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1573 * inet_ntoa is thread-safe
1575 * updwtmp is moved from libutil to libc
1577 * rewrite of cbrt function
1579 * update of timezone data
1593 * add atoll function
1595 * fix complex problems in Berkeley DB code
1597 * fix math functions
1601 * fixed lots of header problems (especially Linux/GNU specific)
1603 * dynamic loader preserves all registers
1605 * Roland McGrath provided support for handling of auxiliary objects in
1606 the ELF dynamic loader.
1608 * support for parallel builds is improved
1612 * GNU extensions are no longer declared by default. To enable them you
1613 must define the macro `_GNU_SOURCE' in your program or compile with
1616 * The library has changed from using GNU ld symbol aliases to using weak
1617 symbols where available. The ELF object file format supports weak
1618 symbols; GNU ld also supports weak symbols in the a.out format. (There
1619 is also now support for other GNU ld extensions in ELF. Use the
1620 `--with-elf' option to configure to indicate you have ELF, and
1621 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1622 of many files which contained only symbol aliases, reducing the size of
1623 the source and the compiled library; many other files were renamed to
1624 less cryptic names previously occupied by the symbol alias files.
1625 There is a new header file <elf.h> for programs which operate on
1626 files in the ELF format.
1628 * Converted to Autoconf version 2, so `configure' has more options.
1629 Run `configure --help' to see the details.
1631 * The library can now be configured to build profiling, highly-optimized
1632 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1633 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1634 `configure' enable building these extra libraries. The shared library is
1635 built by default when using both ELF and GNU ld. When shared libraries
1636 are enabled, the new library `-ldl' is available for arbitrary run-time
1637 loading of shared objects; its interface is defined in <dlfcn.h>. The
1638 new header file <link.h> gives access to the internals of the run-time
1639 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1640 application of same name on other systems and it provides information
1641 about dynamically linked binaries.
1643 * The C library now provides the run-time support code for profiling
1644 executables compiled with `-pg'. Programs can control the profiling code
1645 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1646 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1647 the support for this file format was contributed by David Mosberger-Tang.
1649 * The math code has been replaced with a math library based on fdlibm from
1650 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1651 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1652 functions. The math functions now reside in a separate library, so
1653 programs using them will need to use `-lm' their linking commands.
1655 * John C. Bowman contributed optimized ix87 assembler inline functions.
1657 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1658 mechanism similar to that found in Solaris 2. This is now used for the
1659 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1660 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1661 file controls what services are used for each individual database. This
1662 works by loading shared libraries with names specified in `nsswitch.conf',
1663 so service modules can be changed or added at any time without even
1664 relinking any program. Currently there are the file, db, and NIS based
1665 NSS services available.
1667 * The new functions `strtoq' and `strtouq' parse integer values from
1668 strings, like `strtol' and `strtoul', but they return `long long int' and
1669 `unsigned long long int' values, respectively (64-bit quantities).
1671 * The new functions `strtof' and `strtold' parse floating-point values from
1672 strings, like `strtod', but they return `float' and `long double' values,
1673 respectively (on some machines `double' and `long double' are the same).
1675 * Ulrich Drepper has contributed new implementations of the floating-point
1676 printing and reading code used in the `printf' family of functions and
1677 `strtod', `strtof', and `strtold'. These new functions are perfectly
1678 accurate, and much faster than the old ones.
1680 * The implementation of the POSIX locale model was completely rewritten by
1681 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1682 to compile the POSIX locale definition.
1684 * The former dummy implementations of the strcoll and strxfrm function are
1685 now replaced by fully functional code contributed by Ulrich Drepper. The
1686 collation information comes from the POSIX locale definitions.
1688 * The new header <langinfo.h> defines an interface for accessing
1689 various locale-dependent data (using the locale chosen with `setlocale').
1691 * Ulrich Drepper has contributed a new suite of functions for operation on
1692 wide-character and multibyte-character strings, in <wchar.h>;
1693 and classification and case conversion of wide characters, in <wctype.h>.
1694 These new functions are conforming to the ISO C, Amendement 1 specification.
1696 * There is now a second implementation of the standard I/O library available.
1697 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1698 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1700 * You can now use positional parameter specifications in format strings
1701 for the `printf' and `scanf' families of functions. For example,
1702 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1703 ``Number 6, Mr Jones''. This is mainly useful when providing different
1704 format strings for different languages, whose grammars may dictate
1705 different orderings of the values being printed. To support this
1706 feature, the interface for `register_printf_handler' has changed; see
1707 the header file <printf.h> for details.
1709 * The `printf' and `scanf' families of functions now understand a new
1710 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1711 to group numbers as indicated by the locale; for `scanf' and friends, this
1712 says to accept as valid only a number with all the proper grouping
1713 separators in the right places. In the default "C" locale, numbers are
1714 not grouped; but locales for specific countries will define the usual
1715 conventions (i.e. separate thousands with `,' in the US locale).
1717 * The pgrp functions have been regularized, slightly incompatibly but much
1718 less confusingly. The core functions are now `getpgid' and `setpgid',
1719 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1720 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1721 provided for compatibility. There is no longer an incompatible `getpgrp'
1722 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1724 * The new header file <fts.h> and suite of functions simplify programs that
1725 operate on directory trees. This code comes from 4.4 BSD.
1727 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1728 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1729 NSS scheme used in glibc.
1731 * There is a new malloc debugging hook `__memalign_hook'.
1733 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1734 `unsigned int' in <sys/types.h>. These are for compatibility only and
1735 their use is discouraged.
1737 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1738 done differently, so that it works even without GNU ld.
1740 * New function `euidaccess' checks allowed access to a file like `access',
1741 but using the effective IDs instead of the real IDs.
1743 * The time zone data files have been updated for the latest and greatest
1744 local time conventions of the countries of the world.
1746 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1749 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1750 for formatting floating-point numbers. They are provided only for
1751 compatibility; new programs should use `sprintf' instead. There are
1752 also equivalent function for the `long double' floating-point type and
1753 all functions also exist in a reentrant form.
1755 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1756 functions for maintaining the login-record files (primarily of use to
1757 system programs such as `login'), and convenient functions for
1758 allocating and initializing a pseudo-terminal (pty) device.
1760 * Ulrich Drepper has contributed new support for System V style
1761 shared memory and IPC on systems that support it.
1763 * Ulrich Drepper has contributed several miscellaneous new functions found
1764 in System V: The `hsearch' family of functions provide an effective
1765 implementation of hash tables; `a64l' and `l64a' provide a very simple
1766 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1769 * Ulrich Drepper has contributed new reentrant counterparts for the
1770 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1772 * Ulrich Drepper has contributed new, highly-optimized versions of several
1773 string functions for the i486/Pentium family of processors.
1775 * Ulrich Drepper has updated the Linux-specific code, based largely
1776 on work done in Hongjiu Lu's version of GNU libc for Linux.
1777 The GNU library now supports Linux versions 2.0.10 and later,
1778 using the ELF object file format (i[3456]86-*-linux).
1780 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1782 * David Mosberger-Tang and Richard Henderson have ported the C library
1783 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1784 dynamic linking support for ELF/Alpha.
1786 * Richard Henderson contributed several Alpha optimized assembler function
1787 for arithmetic and string handling.
1789 * Ulrich Drepper has contributed a new set of message catalog functions to
1790 support multiple languages using the <libintl.h> interface, for use with
1791 his new package GNU gettext. Translation volunteers have contributed
1792 catalogs of the library's messages in Spanish, German, and Korean.
1794 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1795 program and the `catgets' function for reading the catalog files it
1796 creates. (The <libintl.h> interface is preferred; we include the
1797 <nl_types.h> interface using `catgets' only for source compatibility with
1798 programs already written to use it.)
1800 * New header file <values.h> gives SVID-compatible names for <limits.h>
1803 * Various new macros, declarations, and small header files for compatibility
1806 * New function `group_member' is a convenient way to check if a process has
1807 a given effective group ID.
1809 * When using GCC 2.7 and later, the socket functions are now declared in a
1810 special way so that passing an argument of type `struct sockaddr_in *',
1811 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1812 `struct sockaddr *' type, does not generate a type-clash warning.
1814 * New function `error' declared in header file <error.h> is a convenient
1815 function for printing error messages and optionally exiting; this is the
1816 canonical function used in GNU programs. The new functions `err', `warn',
1817 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1818 doing the same thing.
1820 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1821 POSIX.2 `glob' function to do ~ and {...} expansion.
1823 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1824 `clearenv' which is used in POSIX.9 is also available.
1826 * New function `getsid' returns session ID number on systems that support it.
1828 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1829 files <db.h> and <mpool.h> provide a rich set of functions for several
1830 types of simple databases stored in memory and in files, and <ndbm.h> is
1831 an old `ndbm'-compatible interface using the `db' functions. Link with
1832 `-ldb' to get these functions.
1834 * New macro `strdupa' copies a string like `strdup', but uses local stack
1835 space from `alloca' instead of dynamic heap space from `malloc'.
1837 * New function `strnlen' is like `strlen' but searches only a given maximum
1838 number of characters for the null terminator. `stpncpy', `strndup' and
1839 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1842 * New function `statfs' in header <sys/statfs.h>.
1844 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1845 provide convenient functions for operating on blocks of null-terminated
1848 * A new suite of functions in <utmp.h> handle all the details of reading
1849 and writing the utmp file.
1851 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1854 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1855 completely POSIX compliant and also implemented the extended functionality
1856 to handle alternate digit representation and alternate era date formats.
1858 * Ulrich Drepper provided an implementation of the `strptime' function
1859 defined in XPG4.2 which transforms a string into a `struct tm' value.
1861 * Paul Eggert provided the tzselect shell script as part of the timezone
1862 code. The shell script makes it easy to select the correct timezone
1865 * The implementation of the malloc family of functions is completely replaced
1866 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1867 The implementation uses the mmap function (if available) and it is
1868 optimized for the use in multi threaded programs.
1870 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1871 functions. This new functionality is usable by specifying a special
1872 salt string and it is compatible with implementation on *BSD systems.
1874 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1875 `getsubopt' to handle second level command line options, `bsd_signal'
1876 to access BSD style `signal' functionality, the obsolete `regexp' style
1879 * the `lchown' function is available on system which support this
1882 * The implementation of the shadow password handling function was contributed
1885 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1887 * POSIX.1g support was added. The <sys/select.h> header is available,
1888 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1889 implementation of `getaddrinfo'.
1893 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1895 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1896 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1898 * The new function `daemon' from 4.4 BSD is useful for server programs that
1899 want to put themselves in the background.
1901 * Joel Sherrill has contributed support for several standalone boards that
1902 run without an operating system.
1904 * `printf', `scanf' and friends now accept a `q' type modifier for long
1905 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1907 * All of the code taken from BSD (notably most of the math and networking
1908 routines) has been updated from the BSD 4.4-Lite release.
1910 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1912 * The new functions `getdomainname' and `setdomainname' fetch or change the
1913 YP/NIS domain name. These are system calls which exist on systems which
1916 * The time zone data files have been updated for the latest international
1919 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1920 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1924 * The C library now includes support for Sun RPC, from Sun's free
1925 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1926 are included. (There is still no support for YP.)
1928 * Tom Quinn has contributed a port of the C library to SGI machines running
1929 Irix 4 (mips-sgi-irix4).
1931 * The new `lockf' function is a simplified interface to the locking
1932 facilities of `fcntl', included for compatibility.
1934 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1936 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1938 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1941 * The error message printed by `assert' for a failed assertion now includes
1942 the name of the program (if using GNU ld) and the name of the calling
1943 function (with versions of GCC that support this).
1945 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1947 * The library now includes the <sys/mman.h> header file and memory
1948 management functions `mmap', `munmap', `mprotect', `msync', and
1949 `madvise', on systems that support those facilities.
1951 * The interface for `mcheck' has changed slightly: the function called to
1952 abort the program when an allocation inconsistency is detected now takes
1953 an argument that indicates the type of failure. The new function
1954 `mprobe' lets you request a consistency check for a particular block at
1955 any time (checks are normally done only when you call `free' or `realloc'
1958 * It is now possible to easily cross-compile the C library, building on one
1959 system a library to run on another machine and/or operating system. All
1960 you need to do is set the variable `HOST_CC' in `configparms' to the
1961 native compiler for programs to run on the machine you are building on (a
1962 few generator programs are used on Unix systems); set `CC' to the
1965 * The new function `fexecve' (only implemented on the GNU system) executes
1966 a program file given a file descriptor already open on the file.
1970 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1971 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1973 * You can set the variable `libprefix' in `configparms' to specify a prefix
1974 to be prepended to installed library files; this makes it easy to install
1975 the GNU C library to be linked as `-lgnuc' or whatever.
1977 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1978 copies a limited number of characters from a string, and returns the
1979 address of the last character written.
1981 * You no longer need to check for whether the installed `stddef.h' is
1982 compatible with the GNU C library. configure now checks for you.
1984 * You can now define a per-stream `fileno' function to convert the
1985 stream's cookie into an integral file descriptor.
1987 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1988 allocates zero bytes of storage, and returns a unique pointer which
1989 you can pass to `realloc' or `free'. The behavior is undefined if
1990 you dereference this pointer.
1992 * The C library now runs on Sony NEWS m68k machines running either
1993 NewsOS 3 or NewsOS 4.
1995 * The new `syscall' function is a system-dependent primitive function
1996 for invoking system calls. It has the canonical behavior on Unix
1997 systems, including unreliable return values for some calls (such as
1998 `pipe', `fork' and `getppid').
2000 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2001 to `EAGAIN', which is the preferred name. On systems whose kernels
2002 use two distinct codes, the C library now translates EWOULDBLOCK to
2003 EAGAIN in every system call function.
2007 * The GNU C Library Reference Manual is now distributed with the library.
2008 `make dvi' will produce a DVI file of the printed manual.
2009 `make info' will produce Info files that you can read on line using C-h i
2010 in Emacs or the `info' program.
2011 Please send comments on the manual to bug-glibc-manual@gnu.org.
2013 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2015 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2017 * Jason Merrill has contributed a port to the Sequent Symmetry running
2018 Dynix version 3 (i386-sequent-dynix).
2020 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2021 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2023 * New function `memory_warnings' lets you arrange to get warnings when
2024 malloc is running out of memory to allocate, like Emacs gives you.
2026 * The C library now contains the relocating allocator used in Emacs 19 for
2027 its editing buffers. This allocator (ralloc) minimizes allocation
2028 overhead and fragmentation by moving allocated regions around whenever it
2029 needs to. You always refer to a ralloc'd region with a "handle" (a
2030 pointer to a pointer--an object of type `void **').
2032 * There is a new `printf' format: `%m' gives you the string corresponding
2033 to the error code in `errno'.
2035 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2036 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2037 pass, the `a' modifier says to fill in a `char **' you pass with a
2040 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2041 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2042 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2044 * `mkstemp' is a traditional Unix function to atomically create and open a
2045 uniquely-named temporary file.
2049 * The standard location for the file that says what the local timezone is
2050 has changed again. It is now `/usr/local/etc/localtime' (or more
2051 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2053 * The distribution no longer contains any files with names longer than 14
2056 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2057 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2059 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2063 * The configuration process has changed quite a bit. The `configure'
2064 script is now used just like the configuration scripts for other GNU
2065 packages. The `sysdeps' directory hierarchy is much rearranged.
2066 The file `INSTALL' explains the new scheme in detail.
2068 * The header files no longer need to be processed into ANSI C and
2069 traditional C versions. There is just one set of files to install, and
2070 it will work with ANSI or old C compilers (including `gcc -traditional').
2072 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2073 MIPS DECStation running Ultrix 4.
2075 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2076 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2077 made itself into a shared library.
2079 * Yet further improved support for the i386, running 4.3 BSD-like systems
2080 (such as Mach 3 with the Unix single-server), or System V.
2082 * New function `strncasecmp' to do case-insensitive string comparison
2083 with limited length.
2085 * New function `strsep' is a reentrant alternative to `strtok'.
2087 * New functions `scandir' and `alphasort' for searching directories.
2089 * New function `setenv' is a better interface to `putenv'.
2091 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2092 function for traversing a directory tree.
2094 * The GNU obstack package is now also part of the C library.
2095 The new function `open_obstack_stream' creates a stdio stream that
2096 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2097 formatted output directly to an obstack.
2099 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2100 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2102 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2104 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2105 things to your strings.
2107 * There are some new test programs: test-fseek, testmb, and testrand.
2109 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2110 These ports are not finished, but are a good starting place for really
2111 supporting those systems.
2113 * `/etc/localtime' is now the standard location for the file that says what
2114 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2115 This follows the general principle that `/etc' is the place for all local
2116 configuration files.
2118 * The C library header files now use `extern "C"' when used by the C++
2119 compiler, so the C library should now work with C++ code.
2121 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2122 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2125 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2126 function which uses the `merge sort' algorithm, and is said to be
2127 significantly faster than the old GNU `qsort' function. Merge sort is
2128 now the standard `qsort' function. The new algorithm can require a lot
2129 of temporary storage; so, the old sorting function is called when the
2130 required storage is not available.
2132 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2133 provides the Unix `crypt' function, plus some other entry points.
2135 * The code and header files taken from 4.4 BSD have been updated with the
2136 latest files released from Berkeley.
2138 ----------------------------------------------------------------------
2139 Copyright information:
2141 Copyright (C) 1992-2012 Free Software Foundation, Inc.
2143 Permission is granted to anyone to make or distribute verbatim copies
2144 of this document as received, in any medium, provided that the
2145 copyright notice and this permission notice are preserved,
2146 thus giving the recipient permission to redistribute in turn.
2148 Permission is granted to distribute modified versions
2149 of this document, or of portions of it,
2150 under the above conditions, provided also that they
2151 carry prominent notices stating who last changed them.
2154 version-control: never
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