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 6778, 6808, 9685, 11607, 13717, 13939, 14042, 14090, 14166, 14150, 14151,
13 14154, 14157, 14166, 14173, 14195, 14252, 14283, 14298, 14303, 14307,
14 14328, 14331, 14336, 14337, 14347, 14349
16 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
17 Optimized versions of memcpy, memset, and memcmp added for System z10 and
19 Implemented by Andreas Krebbel.
21 * The new function secure_getenv allows secure access to the environment,
22 returning NULL if running in a SUID/SGID process. This function replaces
23 the internal function __secure_getenv.
25 * SystemTap static probes have been added into the dynamic linker.
26 Implemented by Gary Benson.
28 * Optimizations of string functions strstr, strcasestr and memmem.
29 Implemented by Maxim Kuvyrkov.
31 * The minimum Linux kernel version that this version of the GNU C Library
32 can be used with is 2.6.16.
34 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
35 powerpc POWER7. Implemented by Will Schmidt.
40 * The following bugs are resolved with this release:
42 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
43 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
44 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
45 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
46 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
47 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
48 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
49 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
50 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
51 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
52 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
53 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
54 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
55 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
56 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
57 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
58 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
59 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
60 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
61 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
62 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
63 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
66 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
67 configuring glibc with:
68 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
69 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
70 Implemented by H.J. Lu.
74 + define static_assert
78 + declare at_quick_exit and quick_exit also for ISO C11
80 + aligned_alloc. NB: The code is deliberately allows the size parameter
81 to not be a multiple of the alignment. This is a moronic requirement
82 in the standard but it is only a requirement on the caller, not the
87 + uchar.h support added
89 + CMPLX, CMPLXF, CMPLXL added
91 Implemented by Ulrich Drepper.
93 * Support for the IA-64 has been moved to ports.
95 * Remove support for anything but ELF binary format
97 * Checking versions of poll, ppoll added.
98 Implemented by Ulrich Drepper.
100 * More generic and 64-bit performance optimizations to math functions.
101 Implemented by Ulrich Drepper.
103 * New configure option --enable-obsolete-rpc makes the deprecated RPC
104 headers and functions available at compile time as they were before
105 version 2.14. This option will be removed at some time in the future
106 after the TI-RPC library becomes fully sufficient for the needs of
107 existing applications.
109 * Compatibility code for Linux kernel versions before 2.4 has been removed.
110 Note that glibc is not expected to work with any Linux kernel version
113 * New header <sys/auxv.h> and function getauxval allowing easy access to
114 the AT_* key-value pairs passed from the Linux kernel. The header also
115 defines the HWCAP_* bits associated with the AT_HWCAP key.
117 * New locales: mag_IN
119 * New configure option --enable-systemtap builds SystemTap static probes
120 into libc for setjmp and longjmp and into libpthread for various operations.
121 So far the setjmp/longjmp probes and some of the libpthread probes are
122 provided only for i*86 and x86_64.
123 Implemented by Roland McGrath and Rayson Ho.
125 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
127 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
130 * More optimized functions for SPARC. Implemented by David S. Miller.
132 * Improved support for cross-compilation, especially bootstrap builds
133 without a previously built glibc.
135 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
136 Chris Metcalf from Tilera.
138 * Support for the old ARM ABI has been removed from ports. Only the EABI is
139 now supported for ARM processors.
141 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
142 as the name of the dynamic linker, to distinguish it from the
143 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
145 * Support for CRIS has been removed from ports.
147 * A new class of installed header has been documented for low-level
148 platform-specific functionality. PowerPC added the first instance with a
149 function to provide time base register access. Contributed by Tulio
150 Magno Quites Machado Filho.
152 * ix86 configurations now install header files that are consistent with
153 what x86-64 configurations install. These same header files can be used
154 for -m32, -m64, or -mx32 builds.
155 Contributed by H.J. Lu.
157 * Math library bug fixes. A thorough audit of all open math library bugs was
158 conducted by Joseph Myers. Significant progress was made on many math
159 library bugs resulting in more accurate exceptions and function results.
160 Many thanks to all those that contributed including Andreas Jaeger for his
161 patch review and work on the x87 trigonometric instruction issues.
163 * Timezone data is no longer installed. Timezone-related binaries and scripts
164 will continue to be installed. Users should obtain their timezone data from
165 their distribution provider or from the tzdata package at
166 <ftp://munnari.oz.au/pub/>.
170 * The following bugs are resolved with this release:
172 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
173 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
174 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
175 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
176 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
177 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
178 13484, 13506, 13515, 13523, 13524, 13538, 13540
180 * New program pldd to list loaded object of a process
181 Implemented by Ulrich Drepper.
183 * Add nss_db support back to glibc. No more dependency on Berkeley db
184 and support for initgroups lookups.
185 Implemented by Ulrich Drepper.
187 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
188 Contributed by HJ Lu.
190 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
191 Contributed by HJ Lu.
193 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
194 on x86-32 and x86-64.
195 Contributed by Liubov Dmitrieva.
197 * Optimized strchr and strrchr for SSE on x86-32.
198 Contributed by Liubov Dmitrieva.
200 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
201 for x86-64 and x86-32.
202 Contributed by Liubov Dmitrieva.
204 * New interfaces: scandirat, scandirat64
205 Implemented by Ulrich Drepper.
207 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
208 Implemented by Ulrich Drepper.
210 * nscd now also caches the netgroup database.
211 Implemented by Ulrich Drepper.
213 * Integrate libm with gcc's -ffinite-math-only option.
214 Implemented by Ulrich Drepper.
216 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
217 to math functions. Implemented by Ulrich Drepper.
219 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
220 Implemented by Ulrich Drepper.
222 * New Linux interfaces: process_vm_readv, process_vm_writev
224 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
225 Implemented by Ulrich Drepper.
227 * Optimized nearbyint and strcasecmp for PPC.
228 Implemented by Adhemerval Zanella.
230 * New locales: bho_IN, unm_US, es_CU, ta_LK
234 * The following bugs are resolved with this release:
236 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
237 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
238 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
239 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
240 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
241 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
242 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
243 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
244 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
245 12795, 12811, 12813, 12814, 12841
247 * The RPC implementation in libc is obsoleted. Old programs keep working
248 but new programs cannot be linked with the routines in libc anymore.
249 Programs in need of RPC functionality must be linked against TI-RPC.
250 The TI-RPC implementation is IPv6 enabled and there are other benefits.
252 Visible changes of this change include (obviously) the inability to link
253 programs using RPC functions without referencing the TI-RPC library and the
254 removal of the RPC headers from the glibc headers.
255 Implemented by Ulrich Drepper.
257 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
258 syncfs, setns, sendmmsg
260 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
261 yue_HK, lij_IT, mhr_RU
263 * New encodings: CP770, CP771, CP772, CP773, CP774
265 * New program sotruss to trace calls through PLTs
266 Implemented by Ulrich Drepper.
268 * The malloc hook implementation is marked deprecated and will be removed
269 from the default implementation in the next version. The design never
270 worked ever since the introduction of threads. Even programs which do
271 not create threads themselves can use multiple threads created internally.
275 * The following bugs are resolved with this release:
277 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
278 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
279 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
280 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
283 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
285 * POWER7 optimizations: memset, memcmp, strncmp
287 * New optimized string functions for x86-64: strnlen (SSE2),
288 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
289 Implemented by Ulrich Drepper.
293 * The following bugs are resolved with this release:
295 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
296 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
297 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
298 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
299 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
300 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
301 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
302 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
304 * New interfaces: pthread_getname_np, pthread_setname_np
306 * New Linux interface: recvmmsg
308 * STT_GNU_IFUNC implemented for Sparc by David Miller.
310 * The dynamic linker now recognizes supported ABI versions from the
311 EI_ABIVERSION field in the ELF header.
312 Implemented by Ulrich Drepper.
314 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
315 will not be used to fill in password fields in the passwd.byname replies.
316 Instead it is used to synthesize the shadow.byname table, should it be
317 missing. This is a useful mode in some installations involving Solaris.
318 Implemented by Ulrich Drepper.
320 * New locales: kok_IN, sq_MK, cv_RU
324 * The following bugs are resolved with this release:
326 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
327 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
328 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
329 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
330 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
331 10789, 10817, 10823, 10840, 10847
333 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
335 Implemented by Ulrich Drepper.
337 * Checking version of longjmp added that fails if an uninitialized stack
338 frame would be created. Implemented by Ulrich Drepper.
340 * STT_GNU_IFUNC is now supported in static executables.
341 Implemented by H.J. Lu.
343 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
345 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
346 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
347 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
348 Contributed by H.J. Lu.
350 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
351 Implemented by Ulrich Drepper.
353 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
355 Contributed by H.J. Lu.
357 * Support for fma instruction in AVX on x86-64.
358 Implemented by H.J. Lu and Ulrich Drepper.
360 * AVX support in x86-64 auditing support in ld.so.
361 Implemented by H.J. Lu.
363 * STB_GNU_UNIQUE support added.
364 Implemented by Ulrich Drepper.
366 * Implement second fallback mode for optimized DNS lookup for even more
367 broken environments. If two requests from the same port are not
368 handled correctly close the socket and open a new one before sending
369 the second request. The 'single-request-reopen' option in /etc/resolv.conf
370 can be used to select this mode right away, instead of rediscovering the
371 necessity is every process again.
372 Implemented by Ulrich Drepper.
374 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
375 Implemented by Adam Tkac.
377 * Optimized iconv conversions for S390x.
378 Implemented by Andreas Krebbel.
380 * Using condvars with PI mutexes is now more efficient due to kernel
381 support for requeueing to PI futexes. NPTL support added for x86-64.
382 Implemented by Ulrich Drepper.
384 * New locales: ps_AF, my_MM
388 * The following bugs are resolved with this release:
390 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
391 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
392 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
393 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
394 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
396 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
397 Implemented by Ulrich Drepper.
399 * New Linux interfaces: accept4, fallocate, fallocate64.
400 Implemented by Ulrich Drepper.
402 * Correct declarations of string function when used in C++ code. This
403 could lead to compile errors for invalid C++ code.
405 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
408 * New POSIX 2008 interface: psiginfo
409 Implemented by Ulrich Drepper.
411 * New ISO C++1x interfaces: quick_exit, at_quick_exit
412 Implemented by Ulrich Drepper.
414 * Support for selecting between multiple function definitions at runtime
415 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
417 * The libcrypt library can now use the hash function implementations in
418 NSS. Implemented by Ulrich Drepper.
420 * The malloc implementation can be compiled to be less memory efficient
421 but higher performing in multi-threaded programs.
422 Implemented by Ulrich Drepper.
424 * New locales: nan_TW@latin, ks_IN
426 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
427 Implemented by Ulrich Drepper.
429 * Extended printf hook support. It is possible to use user-defined types
430 and extend existing format specifiers.
431 Implemented by Ulrich Drepper.
433 * Handling for group shadow files has been added.
434 Implemented by Ulrich Drepper.
436 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
437 servers (the case, e.g., for some people using the built-in DNS
438 server in ADSL modems/routers). There is a once-per-process timeout
439 in case of a broken server. To avoid it, users can run nscd or put
440 'options single-request' in /etc/resolv.conf.
441 Implemented by Ulrich Drepper.
445 * The following bugs are resolved with this release:
447 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
448 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
449 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
450 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
451 6968, 6974, 6980, 6995, 7008, 7009, 7029
453 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
454 up at the same time. Implemented by Ulrich Drepper.
456 * TLS descriptors for LD and GD on x86 and x86-64.
457 Implemented by Alexandre Oliva.
459 * getaddrinfo now handles DCCP and UDPlite.
460 Implemented by Ulrich Drepper.
462 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
463 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
464 Implemented by Ulrich Drepper.
466 * New implementation of memmem, strstr, and strcasestr which is O(n).
467 Implemented by Eric Blake.
469 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
471 * Implement "e" option for popen to open file descriptor with the
472 close-on-exec flag set. Implemented by Ulrich Drepper.
474 * Implement "b" mode for fmemopen. In this mode writes writes don't
475 implicitly add a NUL byte and seeks from the end of the buffer really
476 use the buffer end, not the string length as the basis.
477 Implemented by Ulrich Drepper.
479 * Many functions, exported and internal, now atomically set the close-on-exec
480 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
482 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
484 Implemented by Pravin Satpute.
486 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
490 * The following bugs are resolved with this release:
492 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
493 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
494 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
495 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
496 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
497 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
498 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
500 * New locales: bo_CN, bo_IN, shs_CA.
502 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
504 * Sorting rules for some Indian languages (Devanagari and Gujarati).
505 Implemented by Pravin Satpute.
507 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
509 * nscd caches now all timeouts for DNS entries
510 Implemented by Ulrich Drepper.
512 * nscd is more efficient and wakes up less often.
513 Implemented by Ulrich Drepper.
515 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
516 vdprintf, and obstack_vprintf.
517 Implemented by Jakub Jelinek.
519 * Faster memset for x86-64.
520 Implemented by Harsha Jagasia and H.J. Lu.
522 * Faster memcpy on x86.
523 Implemented by Ulrich Drepper.
525 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
526 Implemented by Ulrich Drepper.
528 * Faster sqrt and sqrtf implemention for some PPC variants.
529 Implemented by Steven Munroe.
533 * The following bugs are resolved with this release:
535 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
536 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
537 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
538 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
539 5071, 5103, 5104, 5112, 5113, 5184, 5186
541 * More checking functions: fread, fread_unlocked, open*, mq_open.
542 Implemented by Jakub Jelinek and Ulrich Drepper.
544 * Extend fortification to C++. Implemented by Jakub Jelinek.
546 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
547 by not recognizing 'a' as a modifier when those specs are requested.
548 Implemented by Jakub Jelinek.
550 * PPC optimizations to math and string functions.
551 Implemented by Steven Munroe.
553 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
554 options to be passed. Implemented by Ulrich Drepper.
556 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
558 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
559 Implemented by Ulrich Drepper.
561 * Handle private futexes in the NPTL implementation.
562 Implemented by Jakub Jelinek and Ulrich Drepper.
564 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
565 Implemented by Roland McGrath and Ulrich Drepper.
567 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
569 * SHA-256 and SHA-512 based password encryption.
570 Implemented by Ulrich Drepper.
572 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
573 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
576 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
577 Implemented by Ulrich Drepper.
581 * The following bugs are resolved with this release:
583 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
584 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
585 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
586 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
587 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
588 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
589 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
592 * New Linux interfaces: epoll_pwait, sched_getcpu.
594 * New generic interfaces: strerror_l.
596 * nscd can now cache the services database. Implemented by Ulrich Drepper.
600 * The following bugs are resolved with this release:
602 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
603 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
604 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
605 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
606 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
607 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
608 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
609 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
610 3225, 3251, 3252, 3253, 3273
612 * For Linux, the sorting of addresses returned by getaddrinfo now also
613 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
614 Implemented by Ulrich Drepper.
616 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
617 Implemented by Ulrich Drepper.
619 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
621 * New iconv module for MIK. Contributed by Alexander Shopov.
623 * For sites with broken group and/or passwd database, the auto-propagate
624 option of nscd can prevent creating ID lookup entries from the results
625 of a name lookup and vice versa. This usually is no problem but some
626 site might have problems with the default behavior.
627 Implemented by Ulrich Drepper.
629 * Iterating over entire database in NIS can be slow. With the
630 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
631 to trade time for memory. The entire database will be read at once.
632 Implemented by Ulrich Drepper.
634 * The interfaces introduced in RFC 3542 have been implemented by
637 * Support for the new ELF hash table format was added by Ulrich Drepper.
639 * Support for priority inheritance mutexes added by Jakub Jelinek and
642 * Support for priority protected mutexes added by Jakub Jelinek.
644 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
645 or_IN, csb_PL, fy_NL, sr_ME.
649 * More overflow detection functions.
651 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
652 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
654 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
655 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
656 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
657 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
658 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
659 by Masahide Washizawa.
661 * It is now possible to install audit libraries for the dynamic linker using
662 LD_AUDIT. Implemented by Ulrich Drepper.
664 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
665 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
666 For a libc and libpthread that works well on Linux 2.4 kernels, we
667 recommend using the stable 2.3 branch.
669 * The new function open_wmemstream acts like open_memstream,
670 but uses a wchar_t wide character buffer.
672 * The new function ppoll is an improved version of poll, similar to pselect.
674 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
675 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
676 renameat, unlinkat, linkat, symlinkat, readlinkat.
678 * New Linux kernel system calls: unshare,
679 inotify_init, inotify_add_watch, inotify_rm_watch.
681 * The euidaccess function is now also known by the alias eaccess,
682 for compatibility with some other systems.
684 * Timezone data updated to 2006b version.
688 * The following bugs are resolved with this release:
690 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
691 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
692 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
693 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
694 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
695 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
697 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
699 * As of this release, GCC 4 can be used to compile the C Library.
701 * Timezone data updated to 2005m version.
705 * The following bugs are resolved with this release:
707 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
708 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
709 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
710 777, 787, 821, 822, 823, 825
712 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
716 * Support for RFC 3678. Real implementations exist only for Linux so far.
717 Implemented by Ulrich Drepper.
719 * nscd can now cache entries persistently. Expiring entries are reloaded.
720 For speedups the cache can be shared in memory with client processes.
721 Implemented by Ulrich Drepper.
723 * nscd can now perform SELinux checks.
724 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
726 * getaddrinfo queries are now cached. Canonical name lookup is performed
728 Implemented by Ulrich Drepper.
730 * The nothrow function attribute is used when headers are used by gcc when
731 compiling C code. This can avoid significant amounts of exception
734 * The malloc functions perform more error checking and are stricter when
735 it comes to reacting on errors. The default action is to terminate
736 the process after showing an error message. Implemented by Ulrich Drepper.
738 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
739 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
741 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
742 namespaces using the new function dlmopen(). This feature is of course,
743 like most other dynamic loading functionality, not available in statically
744 linked applications. Implemented by Ulrich Drepper.
746 * Low-overhead boundary checking variants of string and some stdio functions
747 were added. These are to be used in conjunction with a gcc patch by
748 Jakub Jelinek which adds calls to these functions if possible.
749 Implemented by Jakub Jelinek and Ulrich Drepper.
751 * Old code for several operating systems and machine architectures that
752 have not been in working condition in a long time have been removed from
753 the main source tree maintained by the GNU C Library's maintainers.
754 These files are now reside in the separate `ports' source module
755 that is usable as an add-on when building the library.
759 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
760 interrogate the dynamic linker, compatible with the Solaris interface.
762 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
763 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
765 * getifaddrs now uses the netlink interface on Linux to get its information.
766 Implemented by Thorsten Kukuk.
768 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
769 Implemented by Ulrich Drepper.
771 * support for non-executable stacks on x86 has been added. Changes mostly
774 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
777 * getaddrinfo now performs destination address selection according to
782 * Thread-safe interfaces for many functions that access locale data
783 were added in version 2.3, but these features were omitted from NEWS.
784 Many functions have variants with an `_l' suffix that take a `locale_t'
785 object as a parameter rather than consulting the current locale.
786 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
787 create and maintain `locale_t' objects. Additionally, the new function
788 `uselocale' sets "the current locale" (as used by functions not so
789 parameterized) set for an individual thread. These features were added
790 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
792 * The functions getresuid, getresgid, setresuid, and setresgid, which
793 have long been available on Linux, are now declared in <unistd.h>
794 and are now also available on the Hurd.
796 * ELF thread-local storage support (TLS) now works on x86-64.
798 * The new dynamic string token $LIB is expanded in shared library names.
799 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
801 * Aldy Hernandez contributed complete software floating point support for
802 PowerPC machines with no FPU.
804 * fexecve is implemented on Linux.
806 * The `btowc' function should work at least twice as fast due to
807 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
809 * With approriate thread add-ons cancelable functions are now implemented
810 in libc.so as well. No need to call the function in libpthread. This
811 change allowed to finally disable the incorrect and expensive handling
812 of weak definition in ld.so.
814 * Yet more PLT entries in libc.so have been removed. We finally arrived
815 at the bare minimum. Startup times improved appropriately.
817 * Support for the new Linux/x86 system call interface was added. The
818 AT_SYSINFO auxiliary vector entry is recognized and handled.
822 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
825 * iconv (the program and the interface) now accepts empty names (excluding
826 options like //TRANSLIT) to mean "use charset of current locale".
828 * localedef can now transliterate characters in strings which are not in
829 the provided charmap. The information from the input locale is used.
831 * Prelinking support was added for ELF targets. This requires additional
832 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
834 * Read-only stdio streams now use mmap to speed up operation by eliminating
835 copying and buffer underflows. To use add 'm' to the mode string of
836 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
838 * The malloc functions were completely rewritten by Wolfram Gloger based
839 on Doug Lea's malloc-2.7.0.c.
841 * Isamu Hasegawa contributed a completely new and POSIX-conformant
842 implementation of regex.
844 * Bruno Haible upgraded the iconv and locale implementation to support
847 * Contents of the LC_* and LANG environment variables in the CEN style are
848 not recognized anymore. It never was used. Change by Ulrich Drepper.
850 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
851 thread-local storage (TLS) ABI on some platforms.
852 Changes by Ulrich Drepper. SH support by Kaz Kojima.
854 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
855 EUC-JISX0213, and TSCII.
857 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
858 BSD-compatible interface for getting all network interface addresses.
859 Implementation for IPv4 by Roland McGrath.
861 * Loading of locale data is faster due to the introduction of a locale
862 archive. Implemented by Roland McGrath and Ulrich Drepper.
864 * Startup times are significantly reduced by not using exported functions
865 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
868 * Steven Munroe contributed a port to PowerPC64/Linux.
872 * The Hurd now uses the GNU libio implementation of stdio rather than the
873 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
875 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
876 with the same behavior as the Linux system call of the same name.
880 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
881 128-bit long double format.
883 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
884 IBM1161, and IBM1162 charsets.
886 * Andreas Jaeger contributed a port to x86-64/Linux.
888 * Peter Bruin contributed a port to PowerPC/Hurd.
890 * libc functions using I/O streams now can handle wide-oriented streams
893 * optimizations in the dynamic linker. Binaries created by recent binutils
894 versions start up quicker due to reduced time spent on relocations.
896 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
900 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
901 asinh, atanh, j0 for the 128-bit long double format.
903 * Bruno Haible updated all the code handling Unicode in some form to
906 * Speed of regex for single-byte locales is back to previous levels.
907 Patch by Isamu Hasegawa.
909 * Alpha, SPARC, and IA-64 now also using floating stacks.
911 * Startup time of internationalized applications greatly improved through
912 iconv cache. Use iconvconfig to generate the cache file.
913 Contributed by Ulrich Drepper.
915 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
916 severe performance problems. Patch by David Mosberger.
918 * The Hurd port got a lot more functionality like AIO, various stdio
919 extensions, etc. Mainly done by Roland McGrath.
921 * mtrace can now lookup symbols in shared libraries.
925 * Intel's IA-64 math library is largely integrated. It provides fast and
926 accurate implementatations for most basic and standard math functions
927 in float, double, and long double format.
929 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
930 and asin for the 96-bit long double format and asin, log, tan for the
931 128-bit long double format.
933 * The beginning of a last-bit accurate math library by IBM Haifa were added.
934 The basic double functions exist today. Contributed by Abraham Ziv
935 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
936 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
938 * An asynchronous name lookup library was added. The interface is designed
939 after POSIX AIO. The proposal was circulated beforehand to get comments.
940 No negative ones came in. Implemented by Ulrich Drepper.
942 * Port to S390/64bit contributed by Martin Schwidefsky
943 <schwidefsky@de.ibm.com>.
945 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
946 of functions for Linux/IA-64.
948 * The RPC code is now thread safe. Threads can now use the same service
949 of different services at the same time. Patch by Eric Norum
950 <eric.norum@usask.ca> with some help by Ulrich Drepper.
952 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
953 family of functions for Linux/S390.
955 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
956 of functions for Linux/x86.
958 * Port to Linux/CRIS contributed by Axis Communications.
962 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
963 we can now check for namespace violations and missing declarations. The
964 result is that almost all headers are now Unix-compliant (as defined in
965 the upcoming XPG6). The negative side is that some programs might need
966 corrections, too, if they depend on the incorrect form of the headers in
967 previous versions which defined too many symbols and included too many
970 * regex now handles multibyte character sets correctly.
971 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
973 * iconv (the program) does now conform to the upcoming XPG6 and handles
974 charmaps. Instead of the charset names the path of charmaps can be
975 provided and the conversion happens based on this data.
976 Contributed by Ulrich Drepper.
978 * The locale program now provides detailed information about the installed
983 only lists the names of the supported locales
987 provides details such as country, language, and codeset name.
988 Contributed by Ulrich Drepper.
992 * The gencat program now parses the input file according to the charset
993 selected by the LC_CTYPE category. This is important for stateful
994 character sets. To make generating catalogs easier there is a way
995 to overwrite the charset selected by the locale: before the first
996 message or $ quote line the catalog can contain a line like
1000 to select the charset (ISO-8859-2 in this case).
1002 Implemented by Shinya Hanataka and Ulrich Drepper.
1004 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1005 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1006 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1008 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1009 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1011 * The LANGUAGE environment variable is now ignored unless the locale is
1012 changed from the default "C" locale.
1014 * The usual bug fixes.
1018 * Greg McGary added runtime support for bounds checking using gcc's
1019 new -fbounded-pointers option. ix86 target is complete. PowerPC
1022 * Thorsten Kukuk added secure mode support to nscd.
1024 * The Berkeley db libraries have been removed.
1026 Related, the nss_db module is now in a separate package since it
1027 obviously requires a database library being available.
1029 * Wide character I/O streams implemented by Ulrich Drepper.
1031 * Functions from the extended socket API added by Ulrich Drepper.
1033 * Functions feenableexcept and fedisableexcept to control the
1034 behaviour of individual exceptions have been added by Andreas Jaeger.
1036 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1038 * The resolver code has been updated from bind 8.2.3-T5B which supports
1039 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1042 This change could in some situations effect backward compatibility. Since
1043 now `_res' is a thread-local instead of a global variable, modifying it
1044 in one thread does not have any effect in other threads.
1046 The resolver library was also extended to allow IPv6 as the transport
1047 protocol for the requests. This work was done by Stig Venaas.
1049 * Compatibility code for K&R C compilers has been removed from the
1050 header files. A ISO C compiler is needed to use the library
1051 (conforming to either C89 or C99 standard).
1053 * Complete rewrite of the localedef program to support multibyte character
1054 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1055 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1056 Implemented by Ulrich Drepper.
1058 Bruno Haible significantly improved the generation and use of the data
1059 structures for the wide character tables.
1061 * Plural handling in gettext implemented by Ulrich Drepper.
1063 * The utmp daemon has been removed.
1065 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1067 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1070 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1072 * POSIX barriers implemented by Kaz Kylheku.
1074 * POSIX spawn function family implemented by Ulrich Drepper.
1076 * POSIX spinlocks are now available.
1078 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1080 * the configure option --enable-kernel=X.Y.Z allows to strip out
1081 compatibility for kernel versions before X.Y.Z. This is currently only
1082 implemented for Linux.
1084 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1085 field sin6_scope_id. This means that all programs using IPv6 should be
1086 recompiled. Don't expect binary compatibility with previous glibc
1089 * various conversion modules for IBM character sets contributed by
1092 * IA-64 port by Jes Sorensen and HJ Lu.
1106 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1108 * New xdr functions are added; some rpc functions are now 64bit clean.
1110 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1112 * Fixed known incompatibilities with glibc 2.0.
1114 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1116 * Optimized a number of functions (especially the ELF dynamic loader).
1118 * Update timezone data files.
1120 * lots of charmaps corrections
1122 * some new locale definitions and charmaps
1127 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1128 conform to POSIX member type requirements. Symbol versions have been
1129 adjusted as needed within the library, and for direct use by applications,
1130 but there is potential for problems if third-party libraries use
1131 struct timeval as part of their interface. This does not present
1132 a problem for X and other "essential" system libraries.
1134 * An additional locale model to support C++ Standard Library locale
1135 model and probably more was implemented by Ulrich Drepper.
1137 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1140 * Miles Bader provided the `argp' function family to support hierachical
1141 command line argument parsing, layered on top of getopt.
1143 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1145 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1148 * scanf recognizes the %a and %A format for scanning floating point numbers.
1150 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1151 information and interfaces for the available integer types.
1153 * about 130 new math functions were added to implement the ISO C9x math
1156 * the new header <complex.h> contains definitions of the complex math
1157 functions from ISO C 9X.
1159 * the new header <tgmath.h> defines generic macros to use complex or
1160 real valued functions.
1162 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1164 * Andreas Jaeger provided a test suite for the math library.
1166 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1168 * Ulrich Drepper added character set conversion functions (iconv).
1170 * Optimized string functions have been added.
1172 * The localedata addon is now part of glibc.
1174 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1176 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1177 daemon for NSS (nscd).
1179 Missing a better place here are some numbers on improvements. Under
1180 Linux 2.1.125 un-tar-ing the kernel sources takes
1184 using local files 12.19s 6.88s 22.91s
1186 using NIS 13.92s 8.91s 26.34s
1188 using NIS & nscd 10.37s 7.34s 25.30s
1190 using NIS+ 27.57s 30.37s 640.46s
1192 using NIS+ & nscd 10.25s 7.83s 26.51s
1194 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1196 Keep in mind that non-namelookup related operations dominate above times.
1197 It was just a common complain that using NIS+ unpacking the kernel is
1200 [1] The old nscd implementation is not available anymore since it was
1201 distributed with glibc up to version 2.0.98 and thus is now replaced.
1203 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1205 * Mark Kettenis provided a Hesiod NSS module.
1207 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1208 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1210 * rcmd can now handle netgroups (Dick Streefland).
1212 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1215 * Support for the IPv6 protocol has been added to the socket API, as per the
1216 latest draft standards.
1218 * Support for Linux 2.2 has been added.
1220 * Interface changes relative to the latest 2.0.x release:
1221 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1222 addseverity NEW: Unix98
1223 alphasort64 NEW: LFS
1224 argp_err_exit_status NEW: argp, GNU ext
1225 argp_error NEW: argp, GNU ext
1226 argp_failure NEW: argp, GNU ext
1227 argp_help NEW: argp, GNU ext
1228 argp_parse NEW: argp, GNU ext
1229 argp_program_bug_address NEW: argp, GNU ext
1230 argp_program_version NEW: argp, GNU ext
1231 argp_program_version_hook NEW: argp, GNU ext
1232 argp_state_help NEW: argp, GNU ext
1233 argp_usage NEW: argp, GNU ext
1234 authdes_create NEW: Secure RPC
1235 authdes_getucred NEW: Secure RPC
1236 authdes_pk_create NEW: Secure RPC
1237 backtrace NEW: GNU ext.
1238 backtrace_symbols NEW: GNU ext.
1239 backtrace_symbols_fd NEW: GNU ext.
1241 cacosf NEW: ISO C 9x
1242 cacosh NEW: ISO C 9x
1243 cacoshf NEW: ISO C 9x
1244 cacoshl NEW: ISO C 9x
1245 cacosl NEW: ISO C 9x
1252 casinf NEW: ISO C 9x
1253 casinh NEW: ISO C 9x
1254 casinhf NEW: ISO C 9x
1255 casinhl NEW: ISO C 9x
1256 casinl NEW: ISO C 9x
1258 catanf NEW: ISO C 9x
1259 catanh NEW: ISO C 9x
1260 catanhf NEW: ISO C 9x
1261 catanhl NEW: ISO C 9x
1262 catanl NEW: ISO C 9x
1263 cbc_crypt NEW: Secure RPC
1267 ccoshf NEW: ISO C 9x
1268 ccoshl NEW: ISO C 9x
1274 cimagf NEW: ISO C 9x
1275 cimagl NEW: ISO C 9x
1276 clearerr_locked REMOVED
1277 clntunix_create NEW: sunrpc ext
1279 clog10 NEW: ISO C 9x
1280 clog10f NEW: ISO C 9x
1281 clog10l NEW: ISO C 9x
1291 cprojf NEW: ISO C 9x
1292 cprojl NEW: ISO C 9x
1294 crealf NEW: ISO C 9x
1295 creall NEW: ISO C 9x
1300 csinhf NEW: ISO C 9x
1301 csinhl NEW: ISO C 9x
1304 csqrtf NEW: ISO C 9x
1305 csqrtl NEW: ISO C 9x
1309 ctanhf NEW: ISO C 9x
1310 ctanhl NEW: ISO C 9x
1312 des_setparity NEW: Secure RPC
1313 ecb_crypt NEW: Secure RPC
1314 endutxent NEW: Unix98
1316 exp10f NEW: ISO C 9x
1317 exp10l NEW: ISO C 9x
1321 fattach NEW: STREAMS
1322 fdetach NEW: STREAMS
1326 feclearexcept NEW: ISO C 9x
1327 fegetenv NEW: ISO C 9x
1328 fegetexceptflag NEW: ISO C 9x
1329 fegetround NEW: ISO C 9x
1330 feholdexcept NEW: ISO C 9x
1332 feraiseexcept NEW: ISO C 9x
1333 ferror_locked REMOVED
1334 fesetenv NEW: ISO C 9x
1335 fesetexceptflag NEW: ISO C 9x
1336 fesetround NEW: ISO C 9x
1337 fetestexcept NEW: ISO C 9x
1338 feupdateenv NEW: ISO C 9x
1339 fflush_locked REMOVED
1343 fgets_unlocked NEW: GNU ext.
1344 fileno_locked REMOVED
1356 fputc_locked REMOVED
1357 fputs_unlocked NEW: GNU ext.
1358 fread_unlocked NEW: GNU ext.
1363 fstatvfs NEW: Unix98
1367 ftruncate64 NEW: LFS
1369 fwrite_unlocked NEW: GNU ext.
1370 gai_strerror NEW: IPv6
1374 getchar_locked REMOVED
1376 getdate_err NEW: Unix98
1377 getdate_r NEW: GNU ext.
1379 getnameinfo NEW: IPv6
1380 getnetname NEW: Secure RPC
1381 getpmsg NEW: STREAMS
1382 getpt NEW: Unix98 PTY
1383 getrlimit64 NEW: LFS
1384 getutxent NEW: Unix98
1385 getutxid NEW: Unix98
1386 getutxline NEW: Unix98
1387 glob64 NEW: GNU ext.
1388 globfree64 NEW: GNU ext.
1389 gnu_get_libc_release NEW: GNU ext.
1390 gnu_get_libc_version NEW: GNU ext.
1391 grantpt NEW: Unix98 PTY
1392 host2netname NEW: Secure RPC
1394 iconv_close NEW: iconv
1395 iconv_open NEW: iconv
1396 if_freenameindex NEW: IPv6
1397 if_indextoname NEW: IPv6
1398 if_nameindex NEW: IPv6
1399 if_nametoindex NEW: IPv6
1400 in6addr_any NEW: IPv6
1401 in6addr_loopback NEW: IPv6
1402 inet6_isipv4mapped NEW: IPv6
1403 isastream NEW: STREAMS
1404 iswblank NEW: GNU ext.
1405 key_decryptsession NEW: Secure RPC
1406 key_decryptsession_pk NEW: Secure RPC
1407 key_encryptsession NEW: Secure RPC
1408 key_encryptsession_pk NEW: Secure RPC
1409 key_gendes NEW: Secure RPC
1410 key_get_conv NEW: Secure RPC
1411 key_secretkey_is_set NEW: Secure RPC
1412 key_setnet NEW: Secure RPC
1413 key_setsecret NEW: Secure RPC
1414 llrint NEW: ISO C 9x
1415 llrintf NEW: ISO C 9x
1416 llrintl NEW: ISO C 9x
1417 llround NEW: ISO C 9x
1418 llroundf NEW: ISO C 9x
1419 llroundl NEW: ISO C 9x
1424 lrintf NEW: ISO C 9x
1425 lrintl NEW: ISO C 9x
1426 lround NEW: ISO C 9x
1427 lroundf NEW: ISO C 9x
1428 lroundl NEW: ISO C 9x
1430 makecontext NEW: Unix98
1431 mempcpy NEW: GNU ext.
1434 modify_ldt NEW: kernel
1438 nearbyint NEW: ISO C 9x
1439 nearbyintf NEW: ISO C 9x
1440 nearbyintl NEW: ISO C 9x
1441 netname2host NEW: Secure RPC
1442 netname2user NEW: Secure RPC
1443 nexttoward NEW: ISO C 9x
1444 nexttowardf NEW: ISO C 9x
1445 nexttowardl NEW: ISO C 9x
1449 passwd2des NEW: Secure RPC
1451 pow10f NEW: GNU ext.
1452 pow10l NEW: GNU ext.
1455 printf_size NEW: GNU ext.
1456 printf_size_info NEW: GNU ext.
1457 profil_counter REMOVED
1458 pthread_mutexattr_getkind_np REPLACED
1459 pthread_mutexattr_setkind_np REPLACED
1460 ptsname NEW: Unix98 PTY
1461 ptsname_r NEW: Unix98 PTY
1463 putchar_locked REMOVED
1464 putgrent NEW: GNU ext.
1466 putpmsg NEW: STREAMS
1467 pututxline NEW: Unix98
1471 readdir64_r NEW: LFS
1472 remquo NEW: ISO C 9x
1473 remquof NEW: ISO C 9x
1474 remquol NEW: ISO C 9x
1476 roundf NEW: ISO C 9x
1477 roundl NEW: ISO C 9x
1479 scalbln NEW: ISO C 9x
1480 scalblnf NEW: ISO C 9x
1481 scalblnl NEW: ISO C 9x
1483 sendfile NEW: kernel
1484 setcontext NEW: Unix98
1485 setrlimit64 NEW: LFS
1486 setutxent NEW: Unix98
1488 sigignore NEW: Unix98
1489 sigqueue NEW: POSIX.1b
1490 sigrelse NEW: Unix98
1491 sigset NEW: POSIX.1b
1492 sigtimedwait NEW: POSIX.1b
1493 sigwaitinfo NEW: POSIX.1b
1494 sincos NEW: GNU ext.
1495 sincosf NEW: GNU ext.
1496 sincosl NEW: GNU ext.
1500 strcasestr NEW: GNU ext.
1501 strtoimax NEW: ISO C 9x
1502 strtoumax NEW: ISO C 9x
1503 strverscmp NEW: GNU ext.
1504 svcauthdes_stats NEW: Secure RPC
1505 svcunix_create NEW: sunrpc etx
1506 svcunixfd_create NEW: sunrpc ext
1507 swapcontext NEW: Unix98
1508 tcgetsid NEW: Unix98 PTY
1509 tdestroy NEW: GNU ext.
1510 tgamma NEW: ISO C 9x
1511 tgammaf NEW: ISO C 9x
1512 tgammal NEW: ISO C 9x
1516 truncf NEW: ISO C 9x
1517 truncl NEW: ISO C 9x
1519 unlockpt NEW: Unix98 PTY
1520 updwtmpx NEW: Unix98
1521 user2netname NEW: Secure RPC
1522 utmpxname NEW: Unix98
1523 versionsort NEW: GNU ext.
1524 versionsort64 NEW: GNU ext.
1526 wcscasecmp NEW: GNU ext.
1527 wcsncasecmp NEW: GNU ext.
1528 wcsnlen NEW: GNU ext.
1529 wcstoimax NEW: ISO C 9x
1530 wcstoll NEW: ISO C 9x
1531 wcstoull NEW: ISO C 9x
1532 wcstoumax NEW: ISO C 9x
1534 wordexp NEW: POSIX.2
1535 wordfree NEW: POSIX.2
1536 write_profiling REMOVED
1537 xdecrypt NEW: Secure RPC
1538 xdr_authdes_cred NEW: Secure RPC
1539 xdr_authdes_verf NEW: Secure RPC
1540 xdr_cryptkeyarg NEW: Secure RPC
1541 xdr_cryptkeyarg2 NEW: Secure RPC
1542 xdr_cryptkeyres NEW: Secure RPC
1543 xdr_getcredres NEW: Secure RPC
1544 xdr_key_netstarg NEW: Secure RPC
1545 xdr_key_netstres NEW: Secure RPC
1546 xdr_keybuf NEW: Secure RPC
1547 xdr_keystatus NEW: Secure RPC
1548 xdr_netnamestr NEW: Secure RPC
1549 xdr_sizeof NEW: Secure RPC
1550 xdr_unixcred NEW: sunrpc ext
1551 xencrypt NEW: Secure RPC
1552 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1563 * inet_ntoa is thread-safe
1565 * updwtmp is moved from libutil to libc
1567 * rewrite of cbrt function
1569 * update of timezone data
1583 * add atoll function
1585 * fix complex problems in Berkeley DB code
1587 * fix math functions
1591 * fixed lots of header problems (especially Linux/GNU specific)
1593 * dynamic loader preserves all registers
1595 * Roland McGrath provided support for handling of auxiliary objects in
1596 the ELF dynamic loader.
1598 * support for parallel builds is improved
1602 * GNU extensions are no longer declared by default. To enable them you
1603 must define the macro `_GNU_SOURCE' in your program or compile with
1606 * The library has changed from using GNU ld symbol aliases to using weak
1607 symbols where available. The ELF object file format supports weak
1608 symbols; GNU ld also supports weak symbols in the a.out format. (There
1609 is also now support for other GNU ld extensions in ELF. Use the
1610 `--with-elf' option to configure to indicate you have ELF, and
1611 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1612 of many files which contained only symbol aliases, reducing the size of
1613 the source and the compiled library; many other files were renamed to
1614 less cryptic names previously occupied by the symbol alias files.
1615 There is a new header file <elf.h> for programs which operate on
1616 files in the ELF format.
1618 * Converted to Autoconf version 2, so `configure' has more options.
1619 Run `configure --help' to see the details.
1621 * The library can now be configured to build profiling, highly-optimized
1622 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1623 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1624 `configure' enable building these extra libraries. The shared library is
1625 built by default when using both ELF and GNU ld. When shared libraries
1626 are enabled, the new library `-ldl' is available for arbitrary run-time
1627 loading of shared objects; its interface is defined in <dlfcn.h>. The
1628 new header file <link.h> gives access to the internals of the run-time
1629 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1630 application of same name on other systems and it provides information
1631 about dynamically linked binaries.
1633 * The C library now provides the run-time support code for profiling
1634 executables compiled with `-pg'. Programs can control the profiling code
1635 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1636 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1637 the support for this file format was contributed by David Mosberger-Tang.
1639 * The math code has been replaced with a math library based on fdlibm from
1640 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1641 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1642 functions. The math functions now reside in a separate library, so
1643 programs using them will need to use `-lm' their linking commands.
1645 * John C. Bowman contributed optimized ix87 assembler inline functions.
1647 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1648 mechanism similar to that found in Solaris 2. This is now used for the
1649 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1650 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1651 file controls what services are used for each individual database. This
1652 works by loading shared libraries with names specified in `nsswitch.conf',
1653 so service modules can be changed or added at any time without even
1654 relinking any program. Currently there are the file, db, and NIS based
1655 NSS services available.
1657 * The new functions `strtoq' and `strtouq' parse integer values from
1658 strings, like `strtol' and `strtoul', but they return `long long int' and
1659 `unsigned long long int' values, respectively (64-bit quantities).
1661 * The new functions `strtof' and `strtold' parse floating-point values from
1662 strings, like `strtod', but they return `float' and `long double' values,
1663 respectively (on some machines `double' and `long double' are the same).
1665 * Ulrich Drepper has contributed new implementations of the floating-point
1666 printing and reading code used in the `printf' family of functions and
1667 `strtod', `strtof', and `strtold'. These new functions are perfectly
1668 accurate, and much faster than the old ones.
1670 * The implementation of the POSIX locale model was completely rewritten by
1671 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1672 to compile the POSIX locale definition.
1674 * The former dummy implementations of the strcoll and strxfrm function are
1675 now replaced by fully functional code contributed by Ulrich Drepper. The
1676 collation information comes from the POSIX locale definitions.
1678 * The new header <langinfo.h> defines an interface for accessing
1679 various locale-dependent data (using the locale chosen with `setlocale').
1681 * Ulrich Drepper has contributed a new suite of functions for operation on
1682 wide-character and multibyte-character strings, in <wchar.h>;
1683 and classification and case conversion of wide characters, in <wctype.h>.
1684 These new functions are conforming to the ISO C, Amendement 1 specification.
1686 * There is now a second implementation of the standard I/O library available.
1687 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1688 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1690 * You can now use positional parameter specifications in format strings
1691 for the `printf' and `scanf' families of functions. For example,
1692 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1693 ``Number 6, Mr Jones''. This is mainly useful when providing different
1694 format strings for different languages, whose grammars may dictate
1695 different orderings of the values being printed. To support this
1696 feature, the interface for `register_printf_handler' has changed; see
1697 the header file <printf.h> for details.
1699 * The `printf' and `scanf' families of functions now understand a new
1700 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1701 to group numbers as indicated by the locale; for `scanf' and friends, this
1702 says to accept as valid only a number with all the proper grouping
1703 separators in the right places. In the default "C" locale, numbers are
1704 not grouped; but locales for specific countries will define the usual
1705 conventions (i.e. separate thousands with `,' in the US locale).
1707 * The pgrp functions have been regularized, slightly incompatibly but much
1708 less confusingly. The core functions are now `getpgid' and `setpgid',
1709 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1710 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1711 provided for compatibility. There is no longer an incompatible `getpgrp'
1712 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1714 * The new header file <fts.h> and suite of functions simplify programs that
1715 operate on directory trees. This code comes from 4.4 BSD.
1717 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1718 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1719 NSS scheme used in glibc.
1721 * There is a new malloc debugging hook `__memalign_hook'.
1723 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1724 `unsigned int' in <sys/types.h>. These are for compatibility only and
1725 their use is discouraged.
1727 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1728 done differently, so that it works even without GNU ld.
1730 * New function `euidaccess' checks allowed access to a file like `access',
1731 but using the effective IDs instead of the real IDs.
1733 * The time zone data files have been updated for the latest and greatest
1734 local time conventions of the countries of the world.
1736 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1739 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1740 for formatting floating-point numbers. They are provided only for
1741 compatibility; new programs should use `sprintf' instead. There are
1742 also equivalent function for the `long double' floating-point type and
1743 all functions also exist in a reentrant form.
1745 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1746 functions for maintaining the login-record files (primarily of use to
1747 system programs such as `login'), and convenient functions for
1748 allocating and initializing a pseudo-terminal (pty) device.
1750 * Ulrich Drepper has contributed new support for System V style
1751 shared memory and IPC on systems that support it.
1753 * Ulrich Drepper has contributed several miscellaneous new functions found
1754 in System V: The `hsearch' family of functions provide an effective
1755 implementation of hash tables; `a64l' and `l64a' provide a very simple
1756 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1759 * Ulrich Drepper has contributed new reentrant counterparts for the
1760 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1762 * Ulrich Drepper has contributed new, highly-optimized versions of several
1763 string functions for the i486/Pentium family of processors.
1765 * Ulrich Drepper has updated the Linux-specific code, based largely
1766 on work done in Hongjiu Lu's version of GNU libc for Linux.
1767 The GNU library now supports Linux versions 2.0.10 and later,
1768 using the ELF object file format (i[3456]86-*-linux).
1770 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1772 * David Mosberger-Tang and Richard Henderson have ported the C library
1773 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1774 dynamic linking support for ELF/Alpha.
1776 * Richard Henderson contributed several Alpha optimized assembler function
1777 for arithmetic and string handling.
1779 * Ulrich Drepper has contributed a new set of message catalog functions to
1780 support multiple languages using the <libintl.h> interface, for use with
1781 his new package GNU gettext. Translation volunteers have contributed
1782 catalogs of the library's messages in Spanish, German, and Korean.
1784 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1785 program and the `catgets' function for reading the catalog files it
1786 creates. (The <libintl.h> interface is preferred; we include the
1787 <nl_types.h> interface using `catgets' only for source compatibility with
1788 programs already written to use it.)
1790 * New header file <values.h> gives SVID-compatible names for <limits.h>
1793 * Various new macros, declarations, and small header files for compatibility
1796 * New function `group_member' is a convenient way to check if a process has
1797 a given effective group ID.
1799 * When using GCC 2.7 and later, the socket functions are now declared in a
1800 special way so that passing an argument of type `struct sockaddr_in *',
1801 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1802 `struct sockaddr *' type, does not generate a type-clash warning.
1804 * New function `error' declared in header file <error.h> is a convenient
1805 function for printing error messages and optionally exiting; this is the
1806 canonical function used in GNU programs. The new functions `err', `warn',
1807 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1808 doing the same thing.
1810 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1811 POSIX.2 `glob' function to do ~ and {...} expansion.
1813 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1814 `clearenv' which is used in POSIX.9 is also available.
1816 * New function `getsid' returns session ID number on systems that support it.
1818 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1819 files <db.h> and <mpool.h> provide a rich set of functions for several
1820 types of simple databases stored in memory and in files, and <ndbm.h> is
1821 an old `ndbm'-compatible interface using the `db' functions. Link with
1822 `-ldb' to get these functions.
1824 * New macro `strdupa' copies a string like `strdup', but uses local stack
1825 space from `alloca' instead of dynamic heap space from `malloc'.
1827 * New function `strnlen' is like `strlen' but searches only a given maximum
1828 number of characters for the null terminator. `stpncpy', `strndup' and
1829 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1832 * New function `statfs' in header <sys/statfs.h>.
1834 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1835 provide convenient functions for operating on blocks of null-terminated
1838 * A new suite of functions in <utmp.h> handle all the details of reading
1839 and writing the utmp file.
1841 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1844 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1845 completely POSIX compliant and also implemented the extended functionality
1846 to handle alternate digit representation and alternate era date formats.
1848 * Ulrich Drepper provided an implementation of the `strptime' function
1849 defined in XPG4.2 which transforms a string into a `struct tm' value.
1851 * Paul Eggert provided the tzselect shell script as part of the timezone
1852 code. The shell script makes it easy to select the correct timezone
1855 * The implementation of the malloc family of functions is completely replaced
1856 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1857 The implementation uses the mmap function (if available) and it is
1858 optimized for the use in multi threaded programs.
1860 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1861 functions. This new functionality is usable by specifying a special
1862 salt string and it is compatible with implementation on *BSD systems.
1864 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1865 `getsubopt' to handle second level command line options, `bsd_signal'
1866 to access BSD style `signal' functionality, the obsolete `regexp' style
1869 * the `lchown' function is available on system which support this
1872 * The implementation of the shadow password handling function was contributed
1875 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1877 * POSIX.1g support was added. The <sys/select.h> header is available,
1878 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1879 implementation of `getaddrinfo'.
1883 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1885 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1886 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1888 * The new function `daemon' from 4.4 BSD is useful for server programs that
1889 want to put themselves in the background.
1891 * Joel Sherrill has contributed support for several standalone boards that
1892 run without an operating system.
1894 * `printf', `scanf' and friends now accept a `q' type modifier for long
1895 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1897 * All of the code taken from BSD (notably most of the math and networking
1898 routines) has been updated from the BSD 4.4-Lite release.
1900 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1902 * The new functions `getdomainname' and `setdomainname' fetch or change the
1903 YP/NIS domain name. These are system calls which exist on systems which
1906 * The time zone data files have been updated for the latest international
1909 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1910 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1914 * The C library now includes support for Sun RPC, from Sun's free
1915 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1916 are included. (There is still no support for YP.)
1918 * Tom Quinn has contributed a port of the C library to SGI machines running
1919 Irix 4 (mips-sgi-irix4).
1921 * The new `lockf' function is a simplified interface to the locking
1922 facilities of `fcntl', included for compatibility.
1924 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1926 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1928 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1931 * The error message printed by `assert' for a failed assertion now includes
1932 the name of the program (if using GNU ld) and the name of the calling
1933 function (with versions of GCC that support this).
1935 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1937 * The library now includes the <sys/mman.h> header file and memory
1938 management functions `mmap', `munmap', `mprotect', `msync', and
1939 `madvise', on systems that support those facilities.
1941 * The interface for `mcheck' has changed slightly: the function called to
1942 abort the program when an allocation inconsistency is detected now takes
1943 an argument that indicates the type of failure. The new function
1944 `mprobe' lets you request a consistency check for a particular block at
1945 any time (checks are normally done only when you call `free' or `realloc'
1948 * It is now possible to easily cross-compile the C library, building on one
1949 system a library to run on another machine and/or operating system. All
1950 you need to do is set the variable `HOST_CC' in `configparms' to the
1951 native compiler for programs to run on the machine you are building on (a
1952 few generator programs are used on Unix systems); set `CC' to the
1955 * The new function `fexecve' (only implemented on the GNU system) executes
1956 a program file given a file descriptor already open on the file.
1960 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1961 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1963 * You can set the variable `libprefix' in `configparms' to specify a prefix
1964 to be prepended to installed library files; this makes it easy to install
1965 the GNU C library to be linked as `-lgnuc' or whatever.
1967 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1968 copies a limited number of characters from a string, and returns the
1969 address of the last character written.
1971 * You no longer need to check for whether the installed `stddef.h' is
1972 compatible with the GNU C library. configure now checks for you.
1974 * You can now define a per-stream `fileno' function to convert the
1975 stream's cookie into an integral file descriptor.
1977 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1978 allocates zero bytes of storage, and returns a unique pointer which
1979 you can pass to `realloc' or `free'. The behavior is undefined if
1980 you dereference this pointer.
1982 * The C library now runs on Sony NEWS m68k machines running either
1983 NewsOS 3 or NewsOS 4.
1985 * The new `syscall' function is a system-dependent primitive function
1986 for invoking system calls. It has the canonical behavior on Unix
1987 systems, including unreliable return values for some calls (such as
1988 `pipe', `fork' and `getppid').
1990 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1991 to `EAGAIN', which is the preferred name. On systems whose kernels
1992 use two distinct codes, the C library now translates EWOULDBLOCK to
1993 EAGAIN in every system call function.
1997 * The GNU C Library Reference Manual is now distributed with the library.
1998 `make dvi' will produce a DVI file of the printed manual.
1999 `make info' will produce Info files that you can read on line using C-h i
2000 in Emacs or the `info' program.
2001 Please send comments on the manual to bug-glibc-manual@gnu.org.
2003 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2005 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2007 * Jason Merrill has contributed a port to the Sequent Symmetry running
2008 Dynix version 3 (i386-sequent-dynix).
2010 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2011 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2013 * New function `memory_warnings' lets you arrange to get warnings when
2014 malloc is running out of memory to allocate, like Emacs gives you.
2016 * The C library now contains the relocating allocator used in Emacs 19 for
2017 its editing buffers. This allocator (ralloc) minimizes allocation
2018 overhead and fragmentation by moving allocated regions around whenever it
2019 needs to. You always refer to a ralloc'd region with a "handle" (a
2020 pointer to a pointer--an object of type `void **').
2022 * There is a new `printf' format: `%m' gives you the string corresponding
2023 to the error code in `errno'.
2025 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2026 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2027 pass, the `a' modifier says to fill in a `char **' you pass with a
2030 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2031 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2032 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2034 * `mkstemp' is a traditional Unix function to atomically create and open a
2035 uniquely-named temporary file.
2039 * The standard location for the file that says what the local timezone is
2040 has changed again. It is now `/usr/local/etc/localtime' (or more
2041 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2043 * The distribution no longer contains any files with names longer than 14
2046 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2047 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2049 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2053 * The configuration process has changed quite a bit. The `configure'
2054 script is now used just like the configuration scripts for other GNU
2055 packages. The `sysdeps' directory hierarchy is much rearranged.
2056 The file `INSTALL' explains the new scheme in detail.
2058 * The header files no longer need to be processed into ANSI C and
2059 traditional C versions. There is just one set of files to install, and
2060 it will work with ANSI or old C compilers (including `gcc -traditional').
2062 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2063 MIPS DECStation running Ultrix 4.
2065 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2066 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2067 made itself into a shared library.
2069 * Yet further improved support for the i386, running 4.3 BSD-like systems
2070 (such as Mach 3 with the Unix single-server), or System V.
2072 * New function `strncasecmp' to do case-insensitive string comparison
2073 with limited length.
2075 * New function `strsep' is a reentrant alternative to `strtok'.
2077 * New functions `scandir' and `alphasort' for searching directories.
2079 * New function `setenv' is a better interface to `putenv'.
2081 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2082 function for traversing a directory tree.
2084 * The GNU obstack package is now also part of the C library.
2085 The new function `open_obstack_stream' creates a stdio stream that
2086 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2087 formatted output directly to an obstack.
2089 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2090 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2092 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2094 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2095 things to your strings.
2097 * There are some new test programs: test-fseek, testmb, and testrand.
2099 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2100 These ports are not finished, but are a good starting place for really
2101 supporting those systems.
2103 * `/etc/localtime' is now the standard location for the file that says what
2104 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2105 This follows the general principle that `/etc' is the place for all local
2106 configuration files.
2108 * The C library header files now use `extern "C"' when used by the C++
2109 compiler, so the C library should now work with C++ code.
2111 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2112 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2115 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2116 function which uses the `merge sort' algorithm, and is said to be
2117 significantly faster than the old GNU `qsort' function. Merge sort is
2118 now the standard `qsort' function. The new algorithm can require a lot
2119 of temporary storage; so, the old sorting function is called when the
2120 required storage is not available.
2122 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2123 provides the Unix `crypt' function, plus some other entry points.
2125 * The code and header files taken from 4.4 BSD have been updated with the
2126 latest files released from Berkeley.
2128 ----------------------------------------------------------------------
2129 Copyright information:
2131 Copyright (C) 1992-2012 Free Software Foundation, Inc.
2133 Permission is granted to anyone to make or distribute verbatim copies
2134 of this document as received, in any medium, provided that the
2135 copyright notice and this permission notice are preserved,
2136 thus giving the recipient permission to redistribute in turn.
2138 Permission is granted to distribute modified versions
2139 of this document, or of portions of it,
2140 under the above conditions, provided also that they
2141 carry prominent notices stating who last changed them.
2144 version-control: never
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