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, 14283, 14298, 14303, 14307, 14328, 14331,
14 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.
37 * The following bugs are resolved with this release:
39 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
40 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
41 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
42 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
43 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
44 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
45 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
46 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
47 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
48 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
49 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
50 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
51 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
52 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
53 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
54 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
55 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
56 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
57 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
58 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
59 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
60 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
63 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
64 configuring glibc with:
65 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
66 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
67 Implemented by H.J. Lu.
71 + define static_assert
75 + declare at_quick_exit and quick_exit also for ISO C11
77 + aligned_alloc. NB: The code is deliberately allows the size parameter
78 to not be a multiple of the alignment. This is a moronic requirement
79 in the standard but it is only a requirement on the caller, not the
84 + uchar.h support added
86 + CMPLX, CMPLXF, CMPLXL added
88 Implemented by Ulrich Drepper.
90 * Support for the IA-64 has been moved to ports.
92 * Remove support for anything but ELF binary format
94 * Checking versions of poll, ppoll added.
95 Implemented by Ulrich Drepper.
97 * More generic and 64-bit performance optimizations to math functions.
98 Implemented by Ulrich Drepper.
100 * New configure option --enable-obsolete-rpc makes the deprecated RPC
101 headers and functions available at compile time as they were before
102 version 2.14. This option will be removed at some time in the future
103 after the TI-RPC library becomes fully sufficient for the needs of
104 existing applications.
106 * Compatibility code for Linux kernel versions before 2.4 has been removed.
107 Note that glibc is not expected to work with any Linux kernel version
110 * New header <sys/auxv.h> and function getauxval allowing easy access to
111 the AT_* key-value pairs passed from the Linux kernel. The header also
112 defines the HWCAP_* bits associated with the AT_HWCAP key.
114 * New locales: mag_IN
116 * New configure option --enable-systemtap builds SystemTap static probes
117 into libc for setjmp and longjmp and into libpthread for various operations.
118 So far the setjmp/longjmp probes and some of the libpthread probes are
119 provided only for i*86 and x86_64.
120 Implemented by Roland McGrath and Rayson Ho.
122 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
124 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
127 * More optimized functions for SPARC. Implemented by David S. Miller.
129 * Improved support for cross-compilation, especially bootstrap builds
130 without a previously built glibc.
132 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
133 Chris Metcalf from Tilera.
135 * Support for the old ARM ABI has been removed from ports. Only the EABI is
136 now supported for ARM processors.
138 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
139 as the name of the dynamic linker, to distinguish it from the
140 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
142 * Support for CRIS has been removed from ports.
144 * A new class of installed header has been documented for low-level
145 platform-specific functionality. PowerPC added the first instance with a
146 function to provide time base register access. Contributed by Tulio
147 Magno Quites Machado Filho.
149 * ix86 configurations now install header files that are consistent with
150 what x86-64 configurations install. These same header files can be used
151 for -m32, -m64, or -mx32 builds.
152 Contributed by H.J. Lu.
154 * Math library bug fixes. A thorough audit of all open math library bugs was
155 conducted by Joseph Myers. Significant progress was made on many math
156 library bugs resulting in more accurate exceptions and function results.
157 Many thanks to all those that contributed including Andreas Jaeger for his
158 patch review and work on the x87 trigonometric instruction issues.
160 * Timezone data is no longer installed. Timezone-related binaries and scripts
161 will continue to be installed. Users should obtain their timezone data from
162 their distribution provider or from the tzdata package at
163 <ftp://munnari.oz.au/pub/>.
167 * The following bugs are resolved with this release:
169 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
170 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
171 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
172 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
173 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
174 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
175 13484, 13506, 13515, 13523, 13524, 13538, 13540
177 * New program pldd to list loaded object of a process
178 Implemented by Ulrich Drepper.
180 * Add nss_db support back to glibc. No more dependency on Berkeley db
181 and support for initgroups lookups.
182 Implemented by Ulrich Drepper.
184 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
185 Contributed by HJ Lu.
187 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
188 Contributed by HJ Lu.
190 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
191 on x86-32 and x86-64.
192 Contributed by Liubov Dmitrieva.
194 * Optimized strchr and strrchr for SSE on x86-32.
195 Contributed by Liubov Dmitrieva.
197 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
198 for x86-64 and x86-32.
199 Contributed by Liubov Dmitrieva.
201 * New interfaces: scandirat, scandirat64
202 Implemented by Ulrich Drepper.
204 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
205 Implemented by Ulrich Drepper.
207 * nscd now also caches the netgroup database.
208 Implemented by Ulrich Drepper.
210 * Integrate libm with gcc's -ffinite-math-only option.
211 Implemented by Ulrich Drepper.
213 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
214 to math functions. Implemented by Ulrich Drepper.
216 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
217 Implemented by Ulrich Drepper.
219 * New Linux interfaces: process_vm_readv, process_vm_writev
221 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
222 Implemented by Ulrich Drepper.
224 * Optimized nearbyint and strcasecmp for PPC.
225 Implemented by Adhemerval Zanella.
227 * New locales: bho_IN, unm_US, es_CU, ta_LK
231 * The following bugs are resolved with this release:
233 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
234 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
235 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
236 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
237 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
238 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
239 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
240 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
241 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
242 12795, 12811, 12813, 12814, 12841
244 * The RPC implementation in libc is obsoleted. Old programs keep working
245 but new programs cannot be linked with the routines in libc anymore.
246 Programs in need of RPC functionality must be linked against TI-RPC.
247 The TI-RPC implementation is IPv6 enabled and there are other benefits.
249 Visible changes of this change include (obviously) the inability to link
250 programs using RPC functions without referencing the TI-RPC library and the
251 removal of the RPC headers from the glibc headers.
252 Implemented by Ulrich Drepper.
254 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
255 syncfs, setns, sendmmsg
257 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
258 yue_HK, lij_IT, mhr_RU
260 * New encodings: CP770, CP771, CP772, CP773, CP774
262 * New program sotruss to trace calls through PLTs
263 Implemented by Ulrich Drepper.
265 * The malloc hook implementation is marked deprecated and will be removed
266 from the default implementation in the next version. The design never
267 worked ever since the introduction of threads. Even programs which do
268 not create threads themselves can use multiple threads created internally.
272 * The following bugs are resolved with this release:
274 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
275 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
276 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
277 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
280 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
282 * POWER7 optimizations: memset, memcmp, strncmp
284 * New optimized string functions for x86-64: strnlen (SSE2),
285 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
286 Implemented by Ulrich Drepper.
290 * The following bugs are resolved with this release:
292 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
293 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
294 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
295 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
296 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
297 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
298 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
299 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
301 * New interfaces: pthread_getname_np, pthread_setname_np
303 * New Linux interface: recvmmsg
305 * STT_GNU_IFUNC implemented for Sparc by David Miller.
307 * The dynamic linker now recognizes supported ABI versions from the
308 EI_ABIVERSION field in the ELF header.
309 Implemented by Ulrich Drepper.
311 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
312 will not be used to fill in password fields in the passwd.byname replies.
313 Instead it is used to synthesize the shadow.byname table, should it be
314 missing. This is a useful mode in some installations involving Solaris.
315 Implemented by Ulrich Drepper.
317 * New locales: kok_IN, sq_MK, cv_RU
321 * The following bugs are resolved with this release:
323 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
324 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
325 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
326 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
327 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
328 10789, 10817, 10823, 10840, 10847
330 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
332 Implemented by Ulrich Drepper.
334 * Checking version of longjmp added that fails if an uninitialized stack
335 frame would be created. Implemented by Ulrich Drepper.
337 * STT_GNU_IFUNC is now supported in static executables.
338 Implemented by H.J. Lu.
340 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
342 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
343 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
344 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
345 Contributed by H.J. Lu.
347 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
348 Implemented by Ulrich Drepper.
350 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
352 Contributed by H.J. Lu.
354 * Support for fma instruction in AVX on x86-64.
355 Implemented by H.J. Lu and Ulrich Drepper.
357 * AVX support in x86-64 auditing support in ld.so.
358 Implemented by H.J. Lu.
360 * STB_GNU_UNIQUE support added.
361 Implemented by Ulrich Drepper.
363 * Implement second fallback mode for optimized DNS lookup for even more
364 broken environments. If two requests from the same port are not
365 handled correctly close the socket and open a new one before sending
366 the second request. The 'single-request-reopen' option in /etc/resolv.conf
367 can be used to select this mode right away, instead of rediscovering the
368 necessity is every process again.
369 Implemented by Ulrich Drepper.
371 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
372 Implemented by Adam Tkac.
374 * Optimized iconv conversions for S390x.
375 Implemented by Andreas Krebbel.
377 * Using condvars with PI mutexes is now more efficient due to kernel
378 support for requeueing to PI futexes. NPTL support added for x86-64.
379 Implemented by Ulrich Drepper.
381 * New locales: ps_AF, my_MM
385 * The following bugs are resolved with this release:
387 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
388 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
389 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
390 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
391 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
393 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
394 Implemented by Ulrich Drepper.
396 * New Linux interfaces: accept4, fallocate, fallocate64.
397 Implemented by Ulrich Drepper.
399 * Correct declarations of string function when used in C++ code. This
400 could lead to compile errors for invalid C++ code.
402 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
405 * New POSIX 2008 interface: psiginfo
406 Implemented by Ulrich Drepper.
408 * New ISO C++1x interfaces: quick_exit, at_quick_exit
409 Implemented by Ulrich Drepper.
411 * Support for selecting between multiple function definitions at runtime
412 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
414 * The libcrypt library can now use the hash function implementations in
415 NSS. Implemented by Ulrich Drepper.
417 * The malloc implementation can be compiled to be less memory efficient
418 but higher performing in multi-threaded programs.
419 Implemented by Ulrich Drepper.
421 * New locales: nan_TW@latin, ks_IN
423 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
424 Implemented by Ulrich Drepper.
426 * Extended printf hook support. It is possible to use user-defined types
427 and extend existing format specifiers.
428 Implemented by Ulrich Drepper.
430 * Handling for group shadow files has been added.
431 Implemented by Ulrich Drepper.
433 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
434 servers (the case, e.g., for some people using the built-in DNS
435 server in ADSL modems/routers). There is a once-per-process timeout
436 in case of a broken server. To avoid it, users can run nscd or put
437 'options single-request' in /etc/resolv.conf.
438 Implemented by Ulrich Drepper.
442 * The following bugs are resolved with this release:
444 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
445 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
446 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
447 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
448 6968, 6974, 6980, 6995, 7008, 7009, 7029
450 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
451 up at the same time. Implemented by Ulrich Drepper.
453 * TLS descriptors for LD and GD on x86 and x86-64.
454 Implemented by Alexandre Oliva.
456 * getaddrinfo now handles DCCP and UDPlite.
457 Implemented by Ulrich Drepper.
459 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
460 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
461 Implemented by Ulrich Drepper.
463 * New implementation of memmem, strstr, and strcasestr which is O(n).
464 Implemented by Eric Blake.
466 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
468 * Implement "e" option for popen to open file descriptor with the
469 close-on-exec flag set. Implemented by Ulrich Drepper.
471 * Implement "b" mode for fmemopen. In this mode writes writes don't
472 implicitly add a NUL byte and seeks from the end of the buffer really
473 use the buffer end, not the string length as the basis.
474 Implemented by Ulrich Drepper.
476 * Many functions, exported and internal, now atomically set the close-on-exec
477 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
479 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
481 Implemented by Pravin Satpute.
483 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
487 * The following bugs are resolved with this release:
489 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
490 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
491 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
492 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
493 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
494 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
495 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
497 * New locales: bo_CN, bo_IN, shs_CA.
499 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
501 * Sorting rules for some Indian languages (Devanagari and Gujarati).
502 Implemented by Pravin Satpute.
504 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
506 * nscd caches now all timeouts for DNS entries
507 Implemented by Ulrich Drepper.
509 * nscd is more efficient and wakes up less often.
510 Implemented by Ulrich Drepper.
512 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
513 vdprintf, and obstack_vprintf.
514 Implemented by Jakub Jelinek.
516 * Faster memset for x86-64.
517 Implemented by Harsha Jagasia and H.J. Lu.
519 * Faster memcpy on x86.
520 Implemented by Ulrich Drepper.
522 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
523 Implemented by Ulrich Drepper.
525 * Faster sqrt and sqrtf implemention for some PPC variants.
526 Implemented by Steven Munroe.
530 * The following bugs are resolved with this release:
532 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
533 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
534 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
535 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
536 5071, 5103, 5104, 5112, 5113, 5184, 5186
538 * More checking functions: fread, fread_unlocked, open*, mq_open.
539 Implemented by Jakub Jelinek and Ulrich Drepper.
541 * Extend fortification to C++. Implemented by Jakub Jelinek.
543 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
544 by not recognizing 'a' as a modifier when those specs are requested.
545 Implemented by Jakub Jelinek.
547 * PPC optimizations to math and string functions.
548 Implemented by Steven Munroe.
550 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
551 options to be passed. Implemented by Ulrich Drepper.
553 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
555 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
556 Implemented by Ulrich Drepper.
558 * Handle private futexes in the NPTL implementation.
559 Implemented by Jakub Jelinek and Ulrich Drepper.
561 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
562 Implemented by Roland McGrath and Ulrich Drepper.
564 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
566 * SHA-256 and SHA-512 based password encryption.
567 Implemented by Ulrich Drepper.
569 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
570 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
573 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
574 Implemented by Ulrich Drepper.
578 * The following bugs are resolved with this release:
580 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
581 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
582 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
583 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
584 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
585 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
586 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
589 * New Linux interfaces: epoll_pwait, sched_getcpu.
591 * New generic interfaces: strerror_l.
593 * nscd can now cache the services database. Implemented by Ulrich Drepper.
597 * The following bugs are resolved with this release:
599 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
600 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
601 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
602 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
603 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
604 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
605 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
606 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
607 3225, 3251, 3252, 3253, 3273
609 * For Linux, the sorting of addresses returned by getaddrinfo now also
610 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
611 Implemented by Ulrich Drepper.
613 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
614 Implemented by Ulrich Drepper.
616 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
618 * New iconv module for MIK. Contributed by Alexander Shopov.
620 * For sites with broken group and/or passwd database, the auto-propagate
621 option of nscd can prevent creating ID lookup entries from the results
622 of a name lookup and vice versa. This usually is no problem but some
623 site might have problems with the default behavior.
624 Implemented by Ulrich Drepper.
626 * Iterating over entire database in NIS can be slow. With the
627 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
628 to trade time for memory. The entire database will be read at once.
629 Implemented by Ulrich Drepper.
631 * The interfaces introduced in RFC 3542 have been implemented by
634 * Support for the new ELF hash table format was added by Ulrich Drepper.
636 * Support for priority inheritance mutexes added by Jakub Jelinek and
639 * Support for priority protected mutexes added by Jakub Jelinek.
641 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
642 or_IN, csb_PL, fy_NL, sr_ME.
646 * More overflow detection functions.
648 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
649 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
651 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
652 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
653 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
654 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
655 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
656 by Masahide Washizawa.
658 * It is now possible to install audit libraries for the dynamic linker using
659 LD_AUDIT. Implemented by Ulrich Drepper.
661 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
662 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
663 For a libc and libpthread that works well on Linux 2.4 kernels, we
664 recommend using the stable 2.3 branch.
666 * The new function open_wmemstream acts like open_memstream,
667 but uses a wchar_t wide character buffer.
669 * The new function ppoll is an improved version of poll, similar to pselect.
671 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
672 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
673 renameat, unlinkat, linkat, symlinkat, readlinkat.
675 * New Linux kernel system calls: unshare,
676 inotify_init, inotify_add_watch, inotify_rm_watch.
678 * The euidaccess function is now also known by the alias eaccess,
679 for compatibility with some other systems.
681 * Timezone data updated to 2006b version.
685 * The following bugs are resolved with this release:
687 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
688 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
689 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
690 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
691 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
692 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
694 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
696 * As of this release, GCC 4 can be used to compile the C Library.
698 * Timezone data updated to 2005m version.
702 * The following bugs are resolved with this release:
704 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
705 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
706 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
707 777, 787, 821, 822, 823, 825
709 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
713 * Support for RFC 3678. Real implementations exist only for Linux so far.
714 Implemented by Ulrich Drepper.
716 * nscd can now cache entries persistently. Expiring entries are reloaded.
717 For speedups the cache can be shared in memory with client processes.
718 Implemented by Ulrich Drepper.
720 * nscd can now perform SELinux checks.
721 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
723 * getaddrinfo queries are now cached. Canonical name lookup is performed
725 Implemented by Ulrich Drepper.
727 * The nothrow function attribute is used when headers are used by gcc when
728 compiling C code. This can avoid significant amounts of exception
731 * The malloc functions perform more error checking and are stricter when
732 it comes to reacting on errors. The default action is to terminate
733 the process after showing an error message. Implemented by Ulrich Drepper.
735 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
736 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
738 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
739 namespaces using the new function dlmopen(). This feature is of course,
740 like most other dynamic loading functionality, not available in statically
741 linked applications. Implemented by Ulrich Drepper.
743 * Low-overhead boundary checking variants of string and some stdio functions
744 were added. These are to be used in conjunction with a gcc patch by
745 Jakub Jelinek which adds calls to these functions if possible.
746 Implemented by Jakub Jelinek and Ulrich Drepper.
748 * Old code for several operating systems and machine architectures that
749 have not been in working condition in a long time have been removed from
750 the main source tree maintained by the GNU C Library's maintainers.
751 These files are now reside in the separate `ports' source module
752 that is usable as an add-on when building the library.
756 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
757 interrogate the dynamic linker, compatible with the Solaris interface.
759 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
760 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
762 * getifaddrs now uses the netlink interface on Linux to get its information.
763 Implemented by Thorsten Kukuk.
765 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
766 Implemented by Ulrich Drepper.
768 * support for non-executable stacks on x86 has been added. Changes mostly
771 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
774 * getaddrinfo now performs destination address selection according to
779 * Thread-safe interfaces for many functions that access locale data
780 were added in version 2.3, but these features were omitted from NEWS.
781 Many functions have variants with an `_l' suffix that take a `locale_t'
782 object as a parameter rather than consulting the current locale.
783 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
784 create and maintain `locale_t' objects. Additionally, the new function
785 `uselocale' sets "the current locale" (as used by functions not so
786 parameterized) set for an individual thread. These features were added
787 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
789 * The functions getresuid, getresgid, setresuid, and setresgid, which
790 have long been available on Linux, are now declared in <unistd.h>
791 and are now also available on the Hurd.
793 * ELF thread-local storage support (TLS) now works on x86-64.
795 * The new dynamic string token $LIB is expanded in shared library names.
796 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
798 * Aldy Hernandez contributed complete software floating point support for
799 PowerPC machines with no FPU.
801 * fexecve is implemented on Linux.
803 * The `btowc' function should work at least twice as fast due to
804 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
806 * With approriate thread add-ons cancelable functions are now implemented
807 in libc.so as well. No need to call the function in libpthread. This
808 change allowed to finally disable the incorrect and expensive handling
809 of weak definition in ld.so.
811 * Yet more PLT entries in libc.so have been removed. We finally arrived
812 at the bare minimum. Startup times improved appropriately.
814 * Support for the new Linux/x86 system call interface was added. The
815 AT_SYSINFO auxiliary vector entry is recognized and handled.
819 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
822 * iconv (the program and the interface) now accepts empty names (excluding
823 options like //TRANSLIT) to mean "use charset of current locale".
825 * localedef can now transliterate characters in strings which are not in
826 the provided charmap. The information from the input locale is used.
828 * Prelinking support was added for ELF targets. This requires additional
829 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
831 * Read-only stdio streams now use mmap to speed up operation by eliminating
832 copying and buffer underflows. To use add 'm' to the mode string of
833 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
835 * The malloc functions were completely rewritten by Wolfram Gloger based
836 on Doug Lea's malloc-2.7.0.c.
838 * Isamu Hasegawa contributed a completely new and POSIX-conformant
839 implementation of regex.
841 * Bruno Haible upgraded the iconv and locale implementation to support
844 * Contents of the LC_* and LANG environment variables in the CEN style are
845 not recognized anymore. It never was used. Change by Ulrich Drepper.
847 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
848 thread-local storage (TLS) ABI on some platforms.
849 Changes by Ulrich Drepper. SH support by Kaz Kojima.
851 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
852 EUC-JISX0213, and TSCII.
854 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
855 BSD-compatible interface for getting all network interface addresses.
856 Implementation for IPv4 by Roland McGrath.
858 * Loading of locale data is faster due to the introduction of a locale
859 archive. Implemented by Roland McGrath and Ulrich Drepper.
861 * Startup times are significantly reduced by not using exported functions
862 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
865 * Steven Munroe contributed a port to PowerPC64/Linux.
869 * The Hurd now uses the GNU libio implementation of stdio rather than the
870 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
872 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
873 with the same behavior as the Linux system call of the same name.
877 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
878 128-bit long double format.
880 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
881 IBM1161, and IBM1162 charsets.
883 * Andreas Jaeger contributed a port to x86-64/Linux.
885 * Peter Bruin contributed a port to PowerPC/Hurd.
887 * libc functions using I/O streams now can handle wide-oriented streams
890 * optimizations in the dynamic linker. Binaries created by recent binutils
891 versions start up quicker due to reduced time spent on relocations.
893 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
897 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
898 asinh, atanh, j0 for the 128-bit long double format.
900 * Bruno Haible updated all the code handling Unicode in some form to
903 * Speed of regex for single-byte locales is back to previous levels.
904 Patch by Isamu Hasegawa.
906 * Alpha, SPARC, and IA-64 now also using floating stacks.
908 * Startup time of internationalized applications greatly improved through
909 iconv cache. Use iconvconfig to generate the cache file.
910 Contributed by Ulrich Drepper.
912 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
913 severe performance problems. Patch by David Mosberger.
915 * The Hurd port got a lot more functionality like AIO, various stdio
916 extensions, etc. Mainly done by Roland McGrath.
918 * mtrace can now lookup symbols in shared libraries.
922 * Intel's IA-64 math library is largely integrated. It provides fast and
923 accurate implementatations for most basic and standard math functions
924 in float, double, and long double format.
926 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
927 and asin for the 96-bit long double format and asin, log, tan for the
928 128-bit long double format.
930 * The beginning of a last-bit accurate math library by IBM Haifa were added.
931 The basic double functions exist today. Contributed by Abraham Ziv
932 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
933 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
935 * An asynchronous name lookup library was added. The interface is designed
936 after POSIX AIO. The proposal was circulated beforehand to get comments.
937 No negative ones came in. Implemented by Ulrich Drepper.
939 * Port to S390/64bit contributed by Martin Schwidefsky
940 <schwidefsky@de.ibm.com>.
942 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
943 of functions for Linux/IA-64.
945 * The RPC code is now thread safe. Threads can now use the same service
946 of different services at the same time. Patch by Eric Norum
947 <eric.norum@usask.ca> with some help by Ulrich Drepper.
949 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
950 family of functions for Linux/S390.
952 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
953 of functions for Linux/x86.
955 * Port to Linux/CRIS contributed by Axis Communications.
959 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
960 we can now check for namespace violations and missing declarations. The
961 result is that almost all headers are now Unix-compliant (as defined in
962 the upcoming XPG6). The negative side is that some programs might need
963 corrections, too, if they depend on the incorrect form of the headers in
964 previous versions which defined too many symbols and included too many
967 * regex now handles multibyte character sets correctly.
968 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
970 * iconv (the program) does now conform to the upcoming XPG6 and handles
971 charmaps. Instead of the charset names the path of charmaps can be
972 provided and the conversion happens based on this data.
973 Contributed by Ulrich Drepper.
975 * The locale program now provides detailed information about the installed
980 only lists the names of the supported locales
984 provides details such as country, language, and codeset name.
985 Contributed by Ulrich Drepper.
989 * The gencat program now parses the input file according to the charset
990 selected by the LC_CTYPE category. This is important for stateful
991 character sets. To make generating catalogs easier there is a way
992 to overwrite the charset selected by the locale: before the first
993 message or $ quote line the catalog can contain a line like
997 to select the charset (ISO-8859-2 in this case).
999 Implemented by Shinya Hanataka and Ulrich Drepper.
1001 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1002 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1003 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1005 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1006 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1008 * The LANGUAGE environment variable is now ignored unless the locale is
1009 changed from the default "C" locale.
1011 * The usual bug fixes.
1015 * Greg McGary added runtime support for bounds checking using gcc's
1016 new -fbounded-pointers option. ix86 target is complete. PowerPC
1019 * Thorsten Kukuk added secure mode support to nscd.
1021 * The Berkeley db libraries have been removed.
1023 Related, the nss_db module is now in a separate package since it
1024 obviously requires a database library being available.
1026 * Wide character I/O streams implemented by Ulrich Drepper.
1028 * Functions from the extended socket API added by Ulrich Drepper.
1030 * Functions feenableexcept and fedisableexcept to control the
1031 behaviour of individual exceptions have been added by Andreas Jaeger.
1033 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1035 * The resolver code has been updated from bind 8.2.3-T5B which supports
1036 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1039 This change could in some situations effect backward compatibility. Since
1040 now `_res' is a thread-local instead of a global variable, modifying it
1041 in one thread does not have any effect in other threads.
1043 The resolver library was also extended to allow IPv6 as the transport
1044 protocol for the requests. This work was done by Stig Venaas.
1046 * Compatibility code for K&R C compilers has been removed from the
1047 header files. A ISO C compiler is needed to use the library
1048 (conforming to either C89 or C99 standard).
1050 * Complete rewrite of the localedef program to support multibyte character
1051 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1052 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1053 Implemented by Ulrich Drepper.
1055 Bruno Haible significantly improved the generation and use of the data
1056 structures for the wide character tables.
1058 * Plural handling in gettext implemented by Ulrich Drepper.
1060 * The utmp daemon has been removed.
1062 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1064 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1067 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1069 * POSIX barriers implemented by Kaz Kylheku.
1071 * POSIX spawn function family implemented by Ulrich Drepper.
1073 * POSIX spinlocks are now available.
1075 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1077 * the configure option --enable-kernel=X.Y.Z allows to strip out
1078 compatibility for kernel versions before X.Y.Z. This is currently only
1079 implemented for Linux.
1081 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1082 field sin6_scope_id. This means that all programs using IPv6 should be
1083 recompiled. Don't expect binary compatibility with previous glibc
1086 * various conversion modules for IBM character sets contributed by
1089 * IA-64 port by Jes Sorensen and HJ Lu.
1103 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1105 * New xdr functions are added; some rpc functions are now 64bit clean.
1107 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1109 * Fixed known incompatibilities with glibc 2.0.
1111 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1113 * Optimized a number of functions (especially the ELF dynamic loader).
1115 * Update timezone data files.
1117 * lots of charmaps corrections
1119 * some new locale definitions and charmaps
1124 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1125 conform to POSIX member type requirements. Symbol versions have been
1126 adjusted as needed within the library, and for direct use by applications,
1127 but there is potential for problems if third-party libraries use
1128 struct timeval as part of their interface. This does not present
1129 a problem for X and other "essential" system libraries.
1131 * An additional locale model to support C++ Standard Library locale
1132 model and probably more was implemented by Ulrich Drepper.
1134 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1137 * Miles Bader provided the `argp' function family to support hierachical
1138 command line argument parsing, layered on top of getopt.
1140 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1142 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1145 * scanf recognizes the %a and %A format for scanning floating point numbers.
1147 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1148 information and interfaces for the available integer types.
1150 * about 130 new math functions were added to implement the ISO C9x math
1153 * the new header <complex.h> contains definitions of the complex math
1154 functions from ISO C 9X.
1156 * the new header <tgmath.h> defines generic macros to use complex or
1157 real valued functions.
1159 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1161 * Andreas Jaeger provided a test suite for the math library.
1163 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1165 * Ulrich Drepper added character set conversion functions (iconv).
1167 * Optimized string functions have been added.
1169 * The localedata addon is now part of glibc.
1171 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1173 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1174 daemon for NSS (nscd).
1176 Missing a better place here are some numbers on improvements. Under
1177 Linux 2.1.125 un-tar-ing the kernel sources takes
1181 using local files 12.19s 6.88s 22.91s
1183 using NIS 13.92s 8.91s 26.34s
1185 using NIS & nscd 10.37s 7.34s 25.30s
1187 using NIS+ 27.57s 30.37s 640.46s
1189 using NIS+ & nscd 10.25s 7.83s 26.51s
1191 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1193 Keep in mind that non-namelookup related operations dominate above times.
1194 It was just a common complain that using NIS+ unpacking the kernel is
1197 [1] The old nscd implementation is not available anymore since it was
1198 distributed with glibc up to version 2.0.98 and thus is now replaced.
1200 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1202 * Mark Kettenis provided a Hesiod NSS module.
1204 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1205 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1207 * rcmd can now handle netgroups (Dick Streefland).
1209 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1212 * Support for the IPv6 protocol has been added to the socket API, as per the
1213 latest draft standards.
1215 * Support for Linux 2.2 has been added.
1217 * Interface changes relative to the latest 2.0.x release:
1218 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1219 addseverity NEW: Unix98
1220 alphasort64 NEW: LFS
1221 argp_err_exit_status NEW: argp, GNU ext
1222 argp_error NEW: argp, GNU ext
1223 argp_failure NEW: argp, GNU ext
1224 argp_help NEW: argp, GNU ext
1225 argp_parse NEW: argp, GNU ext
1226 argp_program_bug_address NEW: argp, GNU ext
1227 argp_program_version NEW: argp, GNU ext
1228 argp_program_version_hook NEW: argp, GNU ext
1229 argp_state_help NEW: argp, GNU ext
1230 argp_usage NEW: argp, GNU ext
1231 authdes_create NEW: Secure RPC
1232 authdes_getucred NEW: Secure RPC
1233 authdes_pk_create NEW: Secure RPC
1234 backtrace NEW: GNU ext.
1235 backtrace_symbols NEW: GNU ext.
1236 backtrace_symbols_fd NEW: GNU ext.
1238 cacosf NEW: ISO C 9x
1239 cacosh NEW: ISO C 9x
1240 cacoshf NEW: ISO C 9x
1241 cacoshl NEW: ISO C 9x
1242 cacosl NEW: ISO C 9x
1249 casinf NEW: ISO C 9x
1250 casinh NEW: ISO C 9x
1251 casinhf NEW: ISO C 9x
1252 casinhl NEW: ISO C 9x
1253 casinl NEW: ISO C 9x
1255 catanf NEW: ISO C 9x
1256 catanh NEW: ISO C 9x
1257 catanhf NEW: ISO C 9x
1258 catanhl NEW: ISO C 9x
1259 catanl NEW: ISO C 9x
1260 cbc_crypt NEW: Secure RPC
1264 ccoshf NEW: ISO C 9x
1265 ccoshl NEW: ISO C 9x
1271 cimagf NEW: ISO C 9x
1272 cimagl NEW: ISO C 9x
1273 clearerr_locked REMOVED
1274 clntunix_create NEW: sunrpc ext
1276 clog10 NEW: ISO C 9x
1277 clog10f NEW: ISO C 9x
1278 clog10l NEW: ISO C 9x
1288 cprojf NEW: ISO C 9x
1289 cprojl NEW: ISO C 9x
1291 crealf NEW: ISO C 9x
1292 creall NEW: ISO C 9x
1297 csinhf NEW: ISO C 9x
1298 csinhl NEW: ISO C 9x
1301 csqrtf NEW: ISO C 9x
1302 csqrtl NEW: ISO C 9x
1306 ctanhf NEW: ISO C 9x
1307 ctanhl NEW: ISO C 9x
1309 des_setparity NEW: Secure RPC
1310 ecb_crypt NEW: Secure RPC
1311 endutxent NEW: Unix98
1313 exp10f NEW: ISO C 9x
1314 exp10l NEW: ISO C 9x
1318 fattach NEW: STREAMS
1319 fdetach NEW: STREAMS
1323 feclearexcept NEW: ISO C 9x
1324 fegetenv NEW: ISO C 9x
1325 fegetexceptflag NEW: ISO C 9x
1326 fegetround NEW: ISO C 9x
1327 feholdexcept NEW: ISO C 9x
1329 feraiseexcept NEW: ISO C 9x
1330 ferror_locked REMOVED
1331 fesetenv NEW: ISO C 9x
1332 fesetexceptflag NEW: ISO C 9x
1333 fesetround NEW: ISO C 9x
1334 fetestexcept NEW: ISO C 9x
1335 feupdateenv NEW: ISO C 9x
1336 fflush_locked REMOVED
1340 fgets_unlocked NEW: GNU ext.
1341 fileno_locked REMOVED
1353 fputc_locked REMOVED
1354 fputs_unlocked NEW: GNU ext.
1355 fread_unlocked NEW: GNU ext.
1360 fstatvfs NEW: Unix98
1364 ftruncate64 NEW: LFS
1366 fwrite_unlocked NEW: GNU ext.
1367 gai_strerror NEW: IPv6
1371 getchar_locked REMOVED
1373 getdate_err NEW: Unix98
1374 getdate_r NEW: GNU ext.
1376 getnameinfo NEW: IPv6
1377 getnetname NEW: Secure RPC
1378 getpmsg NEW: STREAMS
1379 getpt NEW: Unix98 PTY
1380 getrlimit64 NEW: LFS
1381 getutxent NEW: Unix98
1382 getutxid NEW: Unix98
1383 getutxline NEW: Unix98
1384 glob64 NEW: GNU ext.
1385 globfree64 NEW: GNU ext.
1386 gnu_get_libc_release NEW: GNU ext.
1387 gnu_get_libc_version NEW: GNU ext.
1388 grantpt NEW: Unix98 PTY
1389 host2netname NEW: Secure RPC
1391 iconv_close NEW: iconv
1392 iconv_open NEW: iconv
1393 if_freenameindex NEW: IPv6
1394 if_indextoname NEW: IPv6
1395 if_nameindex NEW: IPv6
1396 if_nametoindex NEW: IPv6
1397 in6addr_any NEW: IPv6
1398 in6addr_loopback NEW: IPv6
1399 inet6_isipv4mapped NEW: IPv6
1400 isastream NEW: STREAMS
1401 iswblank NEW: GNU ext.
1402 key_decryptsession NEW: Secure RPC
1403 key_decryptsession_pk NEW: Secure RPC
1404 key_encryptsession NEW: Secure RPC
1405 key_encryptsession_pk NEW: Secure RPC
1406 key_gendes NEW: Secure RPC
1407 key_get_conv NEW: Secure RPC
1408 key_secretkey_is_set NEW: Secure RPC
1409 key_setnet NEW: Secure RPC
1410 key_setsecret NEW: Secure RPC
1411 llrint NEW: ISO C 9x
1412 llrintf NEW: ISO C 9x
1413 llrintl NEW: ISO C 9x
1414 llround NEW: ISO C 9x
1415 llroundf NEW: ISO C 9x
1416 llroundl NEW: ISO C 9x
1421 lrintf NEW: ISO C 9x
1422 lrintl NEW: ISO C 9x
1423 lround NEW: ISO C 9x
1424 lroundf NEW: ISO C 9x
1425 lroundl NEW: ISO C 9x
1427 makecontext NEW: Unix98
1428 mempcpy NEW: GNU ext.
1431 modify_ldt NEW: kernel
1435 nearbyint NEW: ISO C 9x
1436 nearbyintf NEW: ISO C 9x
1437 nearbyintl NEW: ISO C 9x
1438 netname2host NEW: Secure RPC
1439 netname2user NEW: Secure RPC
1440 nexttoward NEW: ISO C 9x
1441 nexttowardf NEW: ISO C 9x
1442 nexttowardl NEW: ISO C 9x
1446 passwd2des NEW: Secure RPC
1448 pow10f NEW: GNU ext.
1449 pow10l NEW: GNU ext.
1452 printf_size NEW: GNU ext.
1453 printf_size_info NEW: GNU ext.
1454 profil_counter REMOVED
1455 pthread_mutexattr_getkind_np REPLACED
1456 pthread_mutexattr_setkind_np REPLACED
1457 ptsname NEW: Unix98 PTY
1458 ptsname_r NEW: Unix98 PTY
1460 putchar_locked REMOVED
1461 putgrent NEW: GNU ext.
1463 putpmsg NEW: STREAMS
1464 pututxline NEW: Unix98
1468 readdir64_r NEW: LFS
1469 remquo NEW: ISO C 9x
1470 remquof NEW: ISO C 9x
1471 remquol NEW: ISO C 9x
1473 roundf NEW: ISO C 9x
1474 roundl NEW: ISO C 9x
1476 scalbln NEW: ISO C 9x
1477 scalblnf NEW: ISO C 9x
1478 scalblnl NEW: ISO C 9x
1480 sendfile NEW: kernel
1481 setcontext NEW: Unix98
1482 setrlimit64 NEW: LFS
1483 setutxent NEW: Unix98
1485 sigignore NEW: Unix98
1486 sigqueue NEW: POSIX.1b
1487 sigrelse NEW: Unix98
1488 sigset NEW: POSIX.1b
1489 sigtimedwait NEW: POSIX.1b
1490 sigwaitinfo NEW: POSIX.1b
1491 sincos NEW: GNU ext.
1492 sincosf NEW: GNU ext.
1493 sincosl NEW: GNU ext.
1497 strcasestr NEW: GNU ext.
1498 strtoimax NEW: ISO C 9x
1499 strtoumax NEW: ISO C 9x
1500 strverscmp NEW: GNU ext.
1501 svcauthdes_stats NEW: Secure RPC
1502 svcunix_create NEW: sunrpc etx
1503 svcunixfd_create NEW: sunrpc ext
1504 swapcontext NEW: Unix98
1505 tcgetsid NEW: Unix98 PTY
1506 tdestroy NEW: GNU ext.
1507 tgamma NEW: ISO C 9x
1508 tgammaf NEW: ISO C 9x
1509 tgammal NEW: ISO C 9x
1513 truncf NEW: ISO C 9x
1514 truncl NEW: ISO C 9x
1516 unlockpt NEW: Unix98 PTY
1517 updwtmpx NEW: Unix98
1518 user2netname NEW: Secure RPC
1519 utmpxname NEW: Unix98
1520 versionsort NEW: GNU ext.
1521 versionsort64 NEW: GNU ext.
1523 wcscasecmp NEW: GNU ext.
1524 wcsncasecmp NEW: GNU ext.
1525 wcsnlen NEW: GNU ext.
1526 wcstoimax NEW: ISO C 9x
1527 wcstoll NEW: ISO C 9x
1528 wcstoull NEW: ISO C 9x
1529 wcstoumax NEW: ISO C 9x
1531 wordexp NEW: POSIX.2
1532 wordfree NEW: POSIX.2
1533 write_profiling REMOVED
1534 xdecrypt NEW: Secure RPC
1535 xdr_authdes_cred NEW: Secure RPC
1536 xdr_authdes_verf NEW: Secure RPC
1537 xdr_cryptkeyarg NEW: Secure RPC
1538 xdr_cryptkeyarg2 NEW: Secure RPC
1539 xdr_cryptkeyres NEW: Secure RPC
1540 xdr_getcredres NEW: Secure RPC
1541 xdr_key_netstarg NEW: Secure RPC
1542 xdr_key_netstres NEW: Secure RPC
1543 xdr_keybuf NEW: Secure RPC
1544 xdr_keystatus NEW: Secure RPC
1545 xdr_netnamestr NEW: Secure RPC
1546 xdr_sizeof NEW: Secure RPC
1547 xdr_unixcred NEW: sunrpc ext
1548 xencrypt NEW: Secure RPC
1549 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1560 * inet_ntoa is thread-safe
1562 * updwtmp is moved from libutil to libc
1564 * rewrite of cbrt function
1566 * update of timezone data
1580 * add atoll function
1582 * fix complex problems in Berkeley DB code
1584 * fix math functions
1588 * fixed lots of header problems (especially Linux/GNU specific)
1590 * dynamic loader preserves all registers
1592 * Roland McGrath provided support for handling of auxiliary objects in
1593 the ELF dynamic loader.
1595 * support for parallel builds is improved
1599 * GNU extensions are no longer declared by default. To enable them you
1600 must define the macro `_GNU_SOURCE' in your program or compile with
1603 * The library has changed from using GNU ld symbol aliases to using weak
1604 symbols where available. The ELF object file format supports weak
1605 symbols; GNU ld also supports weak symbols in the a.out format. (There
1606 is also now support for other GNU ld extensions in ELF. Use the
1607 `--with-elf' option to configure to indicate you have ELF, and
1608 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1609 of many files which contained only symbol aliases, reducing the size of
1610 the source and the compiled library; many other files were renamed to
1611 less cryptic names previously occupied by the symbol alias files.
1612 There is a new header file <elf.h> for programs which operate on
1613 files in the ELF format.
1615 * Converted to Autoconf version 2, so `configure' has more options.
1616 Run `configure --help' to see the details.
1618 * The library can now be configured to build profiling, highly-optimized
1619 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1620 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1621 `configure' enable building these extra libraries. The shared library is
1622 built by default when using both ELF and GNU ld. When shared libraries
1623 are enabled, the new library `-ldl' is available for arbitrary run-time
1624 loading of shared objects; its interface is defined in <dlfcn.h>. The
1625 new header file <link.h> gives access to the internals of the run-time
1626 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1627 application of same name on other systems and it provides information
1628 about dynamically linked binaries.
1630 * The C library now provides the run-time support code for profiling
1631 executables compiled with `-pg'. Programs can control the profiling code
1632 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1633 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1634 the support for this file format was contributed by David Mosberger-Tang.
1636 * The math code has been replaced with a math library based on fdlibm from
1637 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1638 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1639 functions. The math functions now reside in a separate library, so
1640 programs using them will need to use `-lm' their linking commands.
1642 * John C. Bowman contributed optimized ix87 assembler inline functions.
1644 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1645 mechanism similar to that found in Solaris 2. This is now used for the
1646 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1647 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1648 file controls what services are used for each individual database. This
1649 works by loading shared libraries with names specified in `nsswitch.conf',
1650 so service modules can be changed or added at any time without even
1651 relinking any program. Currently there are the file, db, and NIS based
1652 NSS services available.
1654 * The new functions `strtoq' and `strtouq' parse integer values from
1655 strings, like `strtol' and `strtoul', but they return `long long int' and
1656 `unsigned long long int' values, respectively (64-bit quantities).
1658 * The new functions `strtof' and `strtold' parse floating-point values from
1659 strings, like `strtod', but they return `float' and `long double' values,
1660 respectively (on some machines `double' and `long double' are the same).
1662 * Ulrich Drepper has contributed new implementations of the floating-point
1663 printing and reading code used in the `printf' family of functions and
1664 `strtod', `strtof', and `strtold'. These new functions are perfectly
1665 accurate, and much faster than the old ones.
1667 * The implementation of the POSIX locale model was completely rewritten by
1668 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1669 to compile the POSIX locale definition.
1671 * The former dummy implementations of the strcoll and strxfrm function are
1672 now replaced by fully functional code contributed by Ulrich Drepper. The
1673 collation information comes from the POSIX locale definitions.
1675 * The new header <langinfo.h> defines an interface for accessing
1676 various locale-dependent data (using the locale chosen with `setlocale').
1678 * Ulrich Drepper has contributed a new suite of functions for operation on
1679 wide-character and multibyte-character strings, in <wchar.h>;
1680 and classification and case conversion of wide characters, in <wctype.h>.
1681 These new functions are conforming to the ISO C, Amendement 1 specification.
1683 * There is now a second implementation of the standard I/O library available.
1684 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1685 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1687 * You can now use positional parameter specifications in format strings
1688 for the `printf' and `scanf' families of functions. For example,
1689 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1690 ``Number 6, Mr Jones''. This is mainly useful when providing different
1691 format strings for different languages, whose grammars may dictate
1692 different orderings of the values being printed. To support this
1693 feature, the interface for `register_printf_handler' has changed; see
1694 the header file <printf.h> for details.
1696 * The `printf' and `scanf' families of functions now understand a new
1697 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1698 to group numbers as indicated by the locale; for `scanf' and friends, this
1699 says to accept as valid only a number with all the proper grouping
1700 separators in the right places. In the default "C" locale, numbers are
1701 not grouped; but locales for specific countries will define the usual
1702 conventions (i.e. separate thousands with `,' in the US locale).
1704 * The pgrp functions have been regularized, slightly incompatibly but much
1705 less confusingly. The core functions are now `getpgid' and `setpgid',
1706 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1707 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1708 provided for compatibility. There is no longer an incompatible `getpgrp'
1709 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1711 * The new header file <fts.h> and suite of functions simplify programs that
1712 operate on directory trees. This code comes from 4.4 BSD.
1714 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1715 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1716 NSS scheme used in glibc.
1718 * There is a new malloc debugging hook `__memalign_hook'.
1720 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1721 `unsigned int' in <sys/types.h>. These are for compatibility only and
1722 their use is discouraged.
1724 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1725 done differently, so that it works even without GNU ld.
1727 * New function `euidaccess' checks allowed access to a file like `access',
1728 but using the effective IDs instead of the real IDs.
1730 * The time zone data files have been updated for the latest and greatest
1731 local time conventions of the countries of the world.
1733 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1736 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1737 for formatting floating-point numbers. They are provided only for
1738 compatibility; new programs should use `sprintf' instead. There are
1739 also equivalent function for the `long double' floating-point type and
1740 all functions also exist in a reentrant form.
1742 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1743 functions for maintaining the login-record files (primarily of use to
1744 system programs such as `login'), and convenient functions for
1745 allocating and initializing a pseudo-terminal (pty) device.
1747 * Ulrich Drepper has contributed new support for System V style
1748 shared memory and IPC on systems that support it.
1750 * Ulrich Drepper has contributed several miscellaneous new functions found
1751 in System V: The `hsearch' family of functions provide an effective
1752 implementation of hash tables; `a64l' and `l64a' provide a very simple
1753 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1756 * Ulrich Drepper has contributed new reentrant counterparts for the
1757 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1759 * Ulrich Drepper has contributed new, highly-optimized versions of several
1760 string functions for the i486/Pentium family of processors.
1762 * Ulrich Drepper has updated the Linux-specific code, based largely
1763 on work done in Hongjiu Lu's version of GNU libc for Linux.
1764 The GNU library now supports Linux versions 2.0.10 and later,
1765 using the ELF object file format (i[3456]86-*-linux).
1767 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1769 * David Mosberger-Tang and Richard Henderson have ported the C library
1770 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1771 dynamic linking support for ELF/Alpha.
1773 * Richard Henderson contributed several Alpha optimized assembler function
1774 for arithmetic and string handling.
1776 * Ulrich Drepper has contributed a new set of message catalog functions to
1777 support multiple languages using the <libintl.h> interface, for use with
1778 his new package GNU gettext. Translation volunteers have contributed
1779 catalogs of the library's messages in Spanish, German, and Korean.
1781 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1782 program and the `catgets' function for reading the catalog files it
1783 creates. (The <libintl.h> interface is preferred; we include the
1784 <nl_types.h> interface using `catgets' only for source compatibility with
1785 programs already written to use it.)
1787 * New header file <values.h> gives SVID-compatible names for <limits.h>
1790 * Various new macros, declarations, and small header files for compatibility
1793 * New function `group_member' is a convenient way to check if a process has
1794 a given effective group ID.
1796 * When using GCC 2.7 and later, the socket functions are now declared in a
1797 special way so that passing an argument of type `struct sockaddr_in *',
1798 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1799 `struct sockaddr *' type, does not generate a type-clash warning.
1801 * New function `error' declared in header file <error.h> is a convenient
1802 function for printing error messages and optionally exiting; this is the
1803 canonical function used in GNU programs. The new functions `err', `warn',
1804 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1805 doing the same thing.
1807 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1808 POSIX.2 `glob' function to do ~ and {...} expansion.
1810 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1811 `clearenv' which is used in POSIX.9 is also available.
1813 * New function `getsid' returns session ID number on systems that support it.
1815 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1816 files <db.h> and <mpool.h> provide a rich set of functions for several
1817 types of simple databases stored in memory and in files, and <ndbm.h> is
1818 an old `ndbm'-compatible interface using the `db' functions. Link with
1819 `-ldb' to get these functions.
1821 * New macro `strdupa' copies a string like `strdup', but uses local stack
1822 space from `alloca' instead of dynamic heap space from `malloc'.
1824 * New function `strnlen' is like `strlen' but searches only a given maximum
1825 number of characters for the null terminator. `stpncpy', `strndup' and
1826 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1829 * New function `statfs' in header <sys/statfs.h>.
1831 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1832 provide convenient functions for operating on blocks of null-terminated
1835 * A new suite of functions in <utmp.h> handle all the details of reading
1836 and writing the utmp file.
1838 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1841 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1842 completely POSIX compliant and also implemented the extended functionality
1843 to handle alternate digit representation and alternate era date formats.
1845 * Ulrich Drepper provided an implementation of the `strptime' function
1846 defined in XPG4.2 which transforms a string into a `struct tm' value.
1848 * Paul Eggert provided the tzselect shell script as part of the timezone
1849 code. The shell script makes it easy to select the correct timezone
1852 * The implementation of the malloc family of functions is completely replaced
1853 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1854 The implementation uses the mmap function (if available) and it is
1855 optimized for the use in multi threaded programs.
1857 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1858 functions. This new functionality is usable by specifying a special
1859 salt string and it is compatible with implementation on *BSD systems.
1861 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1862 `getsubopt' to handle second level command line options, `bsd_signal'
1863 to access BSD style `signal' functionality, the obsolete `regexp' style
1866 * the `lchown' function is available on system which support this
1869 * The implementation of the shadow password handling function was contributed
1872 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1874 * POSIX.1g support was added. The <sys/select.h> header is available,
1875 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1876 implementation of `getaddrinfo'.
1880 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1882 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1883 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1885 * The new function `daemon' from 4.4 BSD is useful for server programs that
1886 want to put themselves in the background.
1888 * Joel Sherrill has contributed support for several standalone boards that
1889 run without an operating system.
1891 * `printf', `scanf' and friends now accept a `q' type modifier for long
1892 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1894 * All of the code taken from BSD (notably most of the math and networking
1895 routines) has been updated from the BSD 4.4-Lite release.
1897 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1899 * The new functions `getdomainname' and `setdomainname' fetch or change the
1900 YP/NIS domain name. These are system calls which exist on systems which
1903 * The time zone data files have been updated for the latest international
1906 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1907 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1911 * The C library now includes support for Sun RPC, from Sun's free
1912 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1913 are included. (There is still no support for YP.)
1915 * Tom Quinn has contributed a port of the C library to SGI machines running
1916 Irix 4 (mips-sgi-irix4).
1918 * The new `lockf' function is a simplified interface to the locking
1919 facilities of `fcntl', included for compatibility.
1921 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1923 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1925 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1928 * The error message printed by `assert' for a failed assertion now includes
1929 the name of the program (if using GNU ld) and the name of the calling
1930 function (with versions of GCC that support this).
1932 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1934 * The library now includes the <sys/mman.h> header file and memory
1935 management functions `mmap', `munmap', `mprotect', `msync', and
1936 `madvise', on systems that support those facilities.
1938 * The interface for `mcheck' has changed slightly: the function called to
1939 abort the program when an allocation inconsistency is detected now takes
1940 an argument that indicates the type of failure. The new function
1941 `mprobe' lets you request a consistency check for a particular block at
1942 any time (checks are normally done only when you call `free' or `realloc'
1945 * It is now possible to easily cross-compile the C library, building on one
1946 system a library to run on another machine and/or operating system. All
1947 you need to do is set the variable `HOST_CC' in `configparms' to the
1948 native compiler for programs to run on the machine you are building on (a
1949 few generator programs are used on Unix systems); set `CC' to the
1952 * The new function `fexecve' (only implemented on the GNU system) executes
1953 a program file given a file descriptor already open on the file.
1957 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1958 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1960 * You can set the variable `libprefix' in `configparms' to specify a prefix
1961 to be prepended to installed library files; this makes it easy to install
1962 the GNU C library to be linked as `-lgnuc' or whatever.
1964 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1965 copies a limited number of characters from a string, and returns the
1966 address of the last character written.
1968 * You no longer need to check for whether the installed `stddef.h' is
1969 compatible with the GNU C library. configure now checks for you.
1971 * You can now define a per-stream `fileno' function to convert the
1972 stream's cookie into an integral file descriptor.
1974 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1975 allocates zero bytes of storage, and returns a unique pointer which
1976 you can pass to `realloc' or `free'. The behavior is undefined if
1977 you dereference this pointer.
1979 * The C library now runs on Sony NEWS m68k machines running either
1980 NewsOS 3 or NewsOS 4.
1982 * The new `syscall' function is a system-dependent primitive function
1983 for invoking system calls. It has the canonical behavior on Unix
1984 systems, including unreliable return values for some calls (such as
1985 `pipe', `fork' and `getppid').
1987 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1988 to `EAGAIN', which is the preferred name. On systems whose kernels
1989 use two distinct codes, the C library now translates EWOULDBLOCK to
1990 EAGAIN in every system call function.
1994 * The GNU C Library Reference Manual is now distributed with the library.
1995 `make dvi' will produce a DVI file of the printed manual.
1996 `make info' will produce Info files that you can read on line using C-h i
1997 in Emacs or the `info' program.
1998 Please send comments on the manual to bug-glibc-manual@gnu.org.
2000 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2002 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2004 * Jason Merrill has contributed a port to the Sequent Symmetry running
2005 Dynix version 3 (i386-sequent-dynix).
2007 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2008 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2010 * New function `memory_warnings' lets you arrange to get warnings when
2011 malloc is running out of memory to allocate, like Emacs gives you.
2013 * The C library now contains the relocating allocator used in Emacs 19 for
2014 its editing buffers. This allocator (ralloc) minimizes allocation
2015 overhead and fragmentation by moving allocated regions around whenever it
2016 needs to. You always refer to a ralloc'd region with a "handle" (a
2017 pointer to a pointer--an object of type `void **').
2019 * There is a new `printf' format: `%m' gives you the string corresponding
2020 to the error code in `errno'.
2022 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2023 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2024 pass, the `a' modifier says to fill in a `char **' you pass with a
2027 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2028 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2029 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2031 * `mkstemp' is a traditional Unix function to atomically create and open a
2032 uniquely-named temporary file.
2036 * The standard location for the file that says what the local timezone is
2037 has changed again. It is now `/usr/local/etc/localtime' (or more
2038 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2040 * The distribution no longer contains any files with names longer than 14
2043 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2044 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2046 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2050 * The configuration process has changed quite a bit. The `configure'
2051 script is now used just like the configuration scripts for other GNU
2052 packages. The `sysdeps' directory hierarchy is much rearranged.
2053 The file `INSTALL' explains the new scheme in detail.
2055 * The header files no longer need to be processed into ANSI C and
2056 traditional C versions. There is just one set of files to install, and
2057 it will work with ANSI or old C compilers (including `gcc -traditional').
2059 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2060 MIPS DECStation running Ultrix 4.
2062 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2063 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2064 made itself into a shared library.
2066 * Yet further improved support for the i386, running 4.3 BSD-like systems
2067 (such as Mach 3 with the Unix single-server), or System V.
2069 * New function `strncasecmp' to do case-insensitive string comparison
2070 with limited length.
2072 * New function `strsep' is a reentrant alternative to `strtok'.
2074 * New functions `scandir' and `alphasort' for searching directories.
2076 * New function `setenv' is a better interface to `putenv'.
2078 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2079 function for traversing a directory tree.
2081 * The GNU obstack package is now also part of the C library.
2082 The new function `open_obstack_stream' creates a stdio stream that
2083 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2084 formatted output directly to an obstack.
2086 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2087 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2089 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2091 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2092 things to your strings.
2094 * There are some new test programs: test-fseek, testmb, and testrand.
2096 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2097 These ports are not finished, but are a good starting place for really
2098 supporting those systems.
2100 * `/etc/localtime' is now the standard location for the file that says what
2101 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2102 This follows the general principle that `/etc' is the place for all local
2103 configuration files.
2105 * The C library header files now use `extern "C"' when used by the C++
2106 compiler, so the C library should now work with C++ code.
2108 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2109 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2112 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2113 function which uses the `merge sort' algorithm, and is said to be
2114 significantly faster than the old GNU `qsort' function. Merge sort is
2115 now the standard `qsort' function. The new algorithm can require a lot
2116 of temporary storage; so, the old sorting function is called when the
2117 required storage is not available.
2119 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2120 provides the Unix `crypt' function, plus some other entry points.
2122 * The code and header files taken from 4.4 BSD have been updated with the
2123 latest files released from Berkeley.
2125 ----------------------------------------------------------------------
2126 Copyright information:
2128 Copyright (C) 1992-2012 Free Software Foundation, Inc.
2130 Permission is granted to anyone to make or distribute verbatim copies
2131 of this document as received, in any medium, provided that the
2132 copyright notice and this permission notice are preserved,
2133 thus giving the recipient permission to redistribute in turn.
2135 Permission is granted to distribute modified versions
2136 of this document, or of portions of it,
2137 under the above conditions, provided also that they
2138 carry prominent notices stating who last changed them.
2141 version-control: never
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