1 GNU C Library NEWS -- history of user-visible changes. 2012-1-7
2 Copyright (C) 1992-2009, 2010, 2011, 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 13526, 13527, 13528, 13529, 13531, 13532, 13533, 13547, 13555
16 + define static_assert
20 + declare at_quick_exit and quick_exit also for ISO C11
22 + aligned_alloc. NB: The code is deliberately allows the size parameter
23 to not be a multiple of the alignment. This is a moronic requirement
24 in the standard but it is only a requirement on the caller, not the
29 + uchar.h support added
33 * The following bugs are resolved with this release:
35 6779, 6783, 9696, 10103, 10709, 11589, 12403, 12786, 12840, 12847, 12868,
36 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962, 13007,
37 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092, 13096,
38 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179, 13185,
39 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335, 13337,
40 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472, 13484,
41 13506, 13515, 13523, 13524, 13538, 13540
43 * New program pldd to list loaded object of a process
44 Implemented by Ulrich Drepper.
46 * Add nss_db support back to glibc. No more dependency on Berkeley db
47 and support for initgroups lookups.
48 Implemented by Ulrich Drepper.
50 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
53 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
56 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
58 Contributed by Liubov Dmitrieva.
60 * Optimized strchr and strrchr for SSE on x86-32.
61 Contributed by Liubov Dmitrieva.
63 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
64 for x86-64 and x86-32.
65 Contributed by Liubov Dmitrieva.
67 * New interfaces: scandirat, scandirat64
68 Implemented by Ulrich Drepper.
70 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
71 Implemented by Ulrich Drepper.
73 * nscd now also caches the netgroup database.
74 Implemented by Ulrich Drepper.
76 * Integrate libm with gcc's -ffinite-math-only option.
77 Implemented by Ulrich Drepper.
79 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
80 to math functions. Implemented by Ulrich Drepper.
82 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
83 Implemented by Ulrich Drepper.
85 * New Linux interfaces: process_vm_readv, process_vm_writev
87 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
88 Implemented by Ulrich Drepper.
90 * Optimized nearbyint and strcasecmp for PPC.
91 Implemented by Adhemerval Zanella.
93 * New locales: bho_IN, unm_US, es_CU, ta_LK
97 * The following bugs are resolved with this release:
99 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
100 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
101 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
102 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
103 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
104 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
105 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
106 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
107 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
108 12795, 12811, 12813, 12814, 12841
110 * The RPC implementation in libc is obsoleted. Old programs keep working
111 but new programs cannot be linked with the routines in libc anymore.
112 Programs in need of RPC functionality must be linked against TI-RPC.
113 The TI-RPC implementation is IPv6 enabled and there are other benefits.
115 Visible changes of this change include (obviously) the inability to link
116 programs using RPC functions without referencing the TI-RPC library and the
117 removal of the RPC headers from the glibc headers.
118 Implemented by Ulrich Drepper.
120 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
121 syncfs, setns, sendmmsg
123 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
124 yue_HK, lij_IT, mhr_RU
126 * New encodings: CP770, CP771, CP772, CP773, CP774
128 * New program sotruss to trace calls through PLTs
129 Implemented by Ulrich Drepper.
131 * The malloc hook implementation is marked deprecated and will be removed
132 from the default implementation in the next version. The design never
133 worked ever since the introduction of threads. Even programs which do
134 not create threads themselves can use multiple threads created internally.
138 * The following bugs are resolved with this release:
140 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
141 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
142 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
143 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
146 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
148 * POWER7 optimizations: memset, memcmp, strncmp
150 * New optimized string functions for x86-64: strnlen (SSE2),
151 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
152 Implemented by Ulrich Drepper.
156 * The following bugs are resolved with this release:
158 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
159 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
160 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
161 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
162 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
163 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
164 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
165 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
167 * New interfaces: pthread_getname_np, pthread_setname_np
169 * New Linux interface: recvmmsg
171 * STT_GNU_IFUNC implemented for Sparc by David Miller.
173 * The dynamic linker now recognizes supported ABI versions from the
174 EI_ABIVERSION field in the ELF header.
175 Implemented by Ulrich Drepper.
177 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
178 will not be used to fill in password fields in the passwd.byname replies.
179 Instead it is used to synthesize the shadow.byname table, should it be
180 missing. This is a useful mode in some installations involving Solaris.
181 Implemented by Ulrich Drepper.
183 * New locales: kok_IN, sq_MK, cv_RU
187 * The following bugs are resolved with this release:
189 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
190 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
191 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
192 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
193 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
194 10789, 10817, 10823, 10840, 10847
196 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
198 Implemented by Ulrich Drepper.
200 * Checking version of longjmp added that fails if an uninitialized stack
201 frame would be created. Implemented by Ulrich Drepper.
203 * STT_GNU_IFUNC is now supported in static executables.
204 Implemented by H.J. Lu.
206 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
208 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
209 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
210 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
211 Contributed by H.J. Lu.
213 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
214 Implemented by Ulrich Drepper.
216 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
218 Contributed by H.J. Lu.
220 * Support for fma instruction in AVX on x86-64.
221 Implemented by H.J. Lu and Ulrich Drepper.
223 * AVX support in x86-64 auditing support in ld.so.
224 Implemented by H.J. Lu.
226 * STB_GNU_UNIQUE support added.
227 Implemented by Ulrich Drepper.
229 * Implement second fallback mode for optimized DNS lookup for even more
230 broken environments. If two requests from the same port are not
231 handled correctly close the socket and open a new one before sending
232 the second request. The 'single-request-reopen' option in /etc/resolv.conf
233 can be used to select this mode right away, instead of rediscovering the
234 necessity is every process again.
235 Implemented by Ulrich Drepper.
237 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
238 Implemented by Adam Tkac.
240 * Optimized iconv conversions for S390x.
241 Implemented by Andreas Krebbel.
243 * Using condvars with PI mutexes is now more efficient due to kernel
244 support for requeueing to PI futexes. NPTL support added for x86-64.
245 Implemented by Ulrich Drepper.
247 * New locales: ps_AF, my_MM
251 * The following bugs are resolved with this release:
253 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
254 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
255 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
256 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
257 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
259 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
260 Implemented by Ulrich Drepper.
262 * New Linux interfaces: accept4, fallocate, fallocate64.
263 Implemented by Ulrich Drepper.
265 * Correct declarations of string function when used in C++ code. This
266 could lead to compile errors for invalid C++ code.
268 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
271 * New POSIX 2008 interface: psiginfo
272 Implemented by Ulrich Drepper.
274 * New ISO C++1x interfaces: quick_exit, at_quick_exit
275 Implemented by Ulrich Drepper.
277 * Support for selecting between multiple function definitions at runtime
278 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
280 * The libcrypt library can now use the hash function implementations in
281 NSS. Implemented by Ulrich Drepper.
283 * The malloc implementation can be compiled to be less memory efficient
284 but higher performing in multi-threaded programs.
285 Implemented by Ulrich Drepper.
287 * New locales: nan_TW@latin, ks_IN
289 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
290 Implemented by Ulrich Drepper.
292 * Extended printf hook support. It is possible to use user-defined types
293 and extend existing format specifiers.
294 Implemented by Ulrich Drepper.
296 * Handling for group shadow files has been added.
297 Implemented by Ulrich Drepper.
299 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
300 servers (the case, e.g., for some people using the built-in DNS
301 server in ADSL modems/routers). There is a once-per-process timeout
302 in case of a broken server. To avoid it, users can run nscd or put
303 'options single-request' in /etc/resolv.conf.
304 Implemented by Ulrich Drepper.
308 * The following bugs are resolved with this release:
310 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
311 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
312 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
313 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
314 6968, 6974, 6980, 6995, 7008, 7009, 7029
316 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
317 up at the same time. Implemented by Ulrich Drepper.
319 * TLS descriptors for LD and GD on x86 and x86-64.
320 Implemented by Alexandre Oliva.
322 * getaddrinfo now handles DCCP and UDPlite.
323 Implemented by Ulrich Drepper.
325 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
326 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
327 Implemented by Ulrich Drepper.
329 * New implementation of memmem, strstr, and strcasestr which is O(n).
330 Implemented by Eric Blake.
332 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
334 * Implement "e" option for popen to open file descriptor with the
335 close-on-exec flag set. Implemented by Ulrich Drepper.
337 * Implement "b" mode for fmemopen. In this mode writes writes don't
338 implicitly add a NUL byte and seeks from the end of the buffer really
339 use the buffer end, not the string length as the basis.
340 Implemented by Ulrich Drepper.
342 * Many functions, exported and internal, now atomically set the close-on-exec
343 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
345 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
347 Implemented by Pravin Satpute.
349 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
353 * The following bugs are resolved with this release:
355 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
356 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
357 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
358 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
359 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
360 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
361 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
363 * New locales: bo_CN, bo_IN, shs_CA.
365 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
367 * Sorting rules for some Indian languages (Devanagari and Gujarati).
368 Implemented by Pravin Satpute.
370 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
372 * nscd caches now all timeouts for DNS entries
373 Implemented by Ulrich Drepper.
375 * nscd is more efficient and wakes up less often.
376 Implemented by Ulrich Drepper.
378 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
379 vdprintf, and obstack_vprintf.
380 Implemented by Jakub Jelinek.
382 * Faster memset for x86-64.
383 Implemented by Harsha Jagasia and H.J. Lu.
385 * Faster memcpy on x86.
386 Implemented by Ulrich Drepper.
388 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
389 Implemented by Ulrich Drepper.
391 * Faster sqrt and sqrtf implemention for some PPC variants.
392 Implemented by Stephen Munroe.
396 * The following bugs are resolved with this release:
398 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
399 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
400 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
401 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
402 5071, 5103, 5104, 5112, 5113, 5184, 5186
404 * More checking functions: fread, fread_unlocked, open*, mq_open.
405 Implemented by Jakub Jelinek and Ulrich Drepper.
407 * Extend fortification to C++. Implemented by Jakub Jelinek.
409 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
410 by not recognizing 'a' as a modifier when those specs are requested.
411 Implemented by Jakub Jelinek.
413 * PPC optimizations to math and string functions.
414 Implemented by Steven Munroe.
416 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
417 options to be passed. Implemented by Ulrich Drepper.
419 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
421 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
422 Implemented by Ulrich Drepper.
424 * Handle private futexes in the NPTL implementation.
425 Implemented by Jakub Jelinek and Ulrich Drepper.
427 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
428 Implemented by Roland McGrath and Ulrich Drepper.
430 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
432 * SHA-256 and SHA-512 based password encryption.
433 Implemented by Ulrich Drepper.
435 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
436 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
439 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
440 Implemented by Ulrich Drepper.
444 * The following bugs are resolved with this release:
446 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
447 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
448 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
449 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
450 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
451 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
452 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
455 * New Linux interfaces: epoll_pwait, sched_getcpu.
457 * New generic interfaces: strerror_l.
459 * nscd can now cache the services database. Implemented by Ulrich Drepper.
463 * The following bugs are resolved with this release:
465 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
466 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
467 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
468 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
469 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
470 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
471 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
472 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
473 3225, 3251, 3252, 3253, 3273
475 * For Linux, the sorting of addresses returned by getaddrinfo now also
476 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
477 Implemented by Ulrich Drepper.
479 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
480 Implemented by Ulrich Drepper.
482 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
484 * New iconv module for MIK. Contributed by Alexander Shopov.
486 * For sites with broken group and/or passwd database, the auto-propagate
487 option of nscd can prevent creating ID lookup entries from the results
488 of a name lookup and vice versa. This usually is no problem but some
489 site might have problems with the default behavior.
490 Implemented by Ulrich Drepper.
492 * Iterating over entire database in NIS can be slow. With the
493 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
494 to trade time for memory. The entire database will be read at once.
495 Implemented by Ulrich Drepper.
497 * The interfaces introduced in RFC 3542 have been implemented by
500 * Support for the new ELF hash table format was added by Ulrich Drepper.
502 * Support for priority inheritance mutexes added by Jakub Jelinek and
505 * Support for priority protected mutexes added by Jakub Jelinek.
507 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
508 or_IN, csb_PL, fy_NL, sr_ME.
512 * More overflow detection functions.
514 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
515 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
517 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
518 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
519 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
520 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
521 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
522 by Masahide Washizawa.
524 * It is now possible to install audit libraries for the dynamic linker using
525 LD_AUDIT. Implemented by Ulrich Drepper.
527 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
528 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
529 For a libc and libpthread that works well on Linux 2.4 kernels, we
530 recommend using the stable 2.3 branch.
532 * The new function open_wmemstream acts like open_memstream,
533 but uses a wchar_t wide character buffer.
535 * The new function ppoll is an improved version of poll, similar to pselect.
537 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
538 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
539 renameat, unlinkat, linkat, symlinkat, readlinkat.
541 * New Linux kernel system calls: unshare,
542 inotify_init, inotify_add_watch, inotify_rm_watch.
544 * The euidaccess function is now also known by the alias eaccess,
545 for compatibility with some other systems.
547 * Timezone data updated to 2006b version.
551 * The following bugs are resolved with this release:
553 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
554 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
555 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
556 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
557 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
558 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
560 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
562 * As of this release, GCC 4 can be used to compile the C Library.
564 * Timezone data updated to 2005m version.
568 * The following bugs are resolved with this release:
570 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
571 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
572 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
573 777, 787, 821, 822, 823, 825
575 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
579 * Support for RFC 3678. Real implementations exist only for Linux so far.
580 Implemented by Ulrich Drepper.
582 * nscd can now cache entries persistently. Expiring entries are reloaded.
583 For speedups the cache can be shared in memory with client processes.
584 Implemented by Ulrich Drepper.
586 * nscd can now perform SELinux checks.
587 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
589 * getaddrinfo queries are now cached. Canonical name lookup is performed
591 Implemented by Ulrich Drepper.
593 * The nothrow function attribute is used when headers are used by gcc when
594 compiling C code. This can avoid significant amounts of exception
597 * The malloc functions perform more error checking and are stricter when
598 it comes to reacting on errors. The default action is to terminate
599 the process after showing an error message. Implemented by Ulrich Drepper.
601 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
602 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
604 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
605 namespaces using the new function dlmopen(). This feature is of course,
606 like most other dynamic loading functionality, not available in statically
607 linked applications. Implemented by Ulrich Drepper.
609 * Low-overhead boundary checking variants of string and some stdio functions
610 were added. These are to be used in conjunction with a gcc patch by
611 Jakub Jelinek which adds calls to these functions if possible.
612 Implemented by Jakub Jelinek and Ulrich Drepper.
614 * Old code for several operating systems and machine architectures that
615 have not been in working condition in a long time have been removed from
616 the main source tree maintained by the GNU C Library's maintainers.
617 These files are now reside in the separate `ports' source module
618 that is usable as an add-on when building the library.
622 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
623 interrogate the dynamic linker, compatible with the Solaris interface.
625 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
626 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
628 * getifaddrs now uses the netlink interface on Linux to get its information.
629 Implemented by Thorsten Kukuk.
631 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
632 Implemented by Ulrich Drepper.
634 * support for non-executable stacks on x86 has been added. Changes mostly
637 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
640 * getaddrinfo now performs destination address selection according to
645 * Thread-safe interfaces for many functions that access locale data
646 were added in version 2.3, but these features were omitted from NEWS.
647 Many functions have variants with an `_l' suffix that take a `locale_t'
648 object as a parameter rather than consulting the current locale.
649 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
650 create and maintain `locale_t' objects. Additionally, the new function
651 `uselocale' sets "the current locale" (as used by functions not so
652 parameterized) set for an individual thread. These features were added
653 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
655 * The functions getresuid, getresgid, setresuid, and setresgid, which
656 have long been available on Linux, are now declared in <unistd.h>
657 and are now also available on the Hurd.
659 * ELF thread-local storage support (TLS) now works on x86-64.
661 * The new dynamic string token $LIB is expanded in shared library names.
662 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
664 * Aldy Hernandez contributed complete software floating point support for
665 PowerPC machines with no FPU.
667 * fexecve is implemented on Linux.
669 * The `btowc' function should work at least twice as fast due to
670 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
672 * With approriate thread add-ons cancelable functions are now implemented
673 in libc.so as well. No need to call the function in libpthread. This
674 change allowed to finally disable the incorrect and expensive handling
675 of weak definition in ld.so.
677 * Yet more PLT entries in libc.so have been removed. We finally arrived
678 at the bare minimum. Startup times improved appropriately.
680 * Support for the new Linux/x86 system call interface was added. The
681 AT_SYSINFO auxiliary vector entry is recognized and handled.
685 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
688 * iconv (the program and the interface) now accepts empty names (excluding
689 options like //TRANSLIT) to mean "use charset of current locale".
691 * localedef can now transliterate characters in strings which are not in
692 the provided charmap. The information from the input locale is used.
694 * Prelinking support was added for ELF targets. This requires additional
695 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
697 * Read-only stdio streams now use mmap to speed up operation by eliminating
698 copying and buffer underflows. To use add 'm' to the mode string of
699 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
701 * The malloc functions were completely rewritten by Wolfram Gloger based
702 on Doug Lea's malloc-2.7.0.c.
704 * Isamu Hasegawa contributed a completely new and POSIX-conformant
705 implementation of regex.
707 * Bruno Haible upgraded the iconv and locale implementation to support
710 * Contents of the LC_* and LANG environment variables in the CEN style are
711 not recognized anymore. It never was used. Change by Ulrich Drepper.
713 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
714 thread-local storage (TLS) ABI on some platforms.
715 Changes by Ulrich Drepper. SH support by Kaz Kojima.
717 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
718 EUC-JISX0213, and TSCII.
720 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
721 BSD-compatible interface for getting all network interface addresses.
722 Implementation for IPv4 by Roland McGrath.
724 * Loading of locale data is faster due to the introduction of a locale
725 archive. Implemented by Roland McGrath and Ulrich Drepper.
727 * Startup times are significantly reduced by not using exported functions
728 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
731 * Steven Munroe contributed a port to PowerPC64/Linux.
735 * The Hurd now uses the GNU libio implementation of stdio rather than the
736 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
738 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
739 with the same behavior as the Linux system call of the same name.
743 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
744 128-bit long double format.
746 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
747 IBM1161, and IBM1162 charsets.
749 * Andreas Jaeger contributed a port to x86-64/Linux.
751 * Peter Bruin contributed a port to PowerPC/Hurd.
753 * libc functions using I/O streams now can handle wide-oriented streams
756 * optimizations in the dynamic linker. Binaries created by recent binutils
757 versions start up quicker due to reduced time spent on relocations.
759 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
763 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
764 asinh, atanh, j0 for the 128-bit long double format.
766 * Bruno Haible updated all the code handling Unicode in some form to
769 * Speed of regex for single-byte locales is back to previous levels.
770 Patch by Isamu Hasegawa.
772 * Alpha, SPARC, and IA-64 now also using floating stacks.
774 * Startup time of internationalized applications greatly improved through
775 iconv cache. Use iconvconfig to generate the cache file.
776 Contributed by Ulrich Drepper.
778 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
779 severe performance problems. Patch by David Mosberger.
781 * The Hurd port got a lot more functionality like AIO, various stdio
782 extensions, etc. Mainly done by Roland McGrath.
784 * mtrace can now lookup symbols in shared libraries.
788 * Intel's IA-64 math library is largely integrated. It provides fast and
789 accurate implementatations for most basic and standard math functions
790 in float, double, and long double format.
792 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
793 and asin for the 96-bit long double format and asin, log, tan for the
794 128-bit long double format.
796 * The beginning of a last-bit accurate math library by IBM Haifa were added.
797 The basic double functions exist today. Contributed by Abraham Ziv
798 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
799 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
801 * An asynchronous name lookup library was added. The interface is designed
802 after POSIX AIO. The proposal was circulated beforehand to get comments.
803 No negative ones came in. Implemented by Ulrich Drepper.
805 * Port to S390/64bit contributed by Martin Schwidefsky
806 <schwidefsky@de.ibm.com>.
808 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
809 of functions for Linux/IA-64.
811 * The RPC code is now thread safe. Threads can now use the same service
812 of different services at the same time. Patch by Eric Norum
813 <eric.norum@usask.ca> with some help by Ulrich Drepper.
815 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
816 family of functions for Linux/S390.
818 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
819 of functions for Linux/x86.
821 * Port to Linux/CRIS contributed by Axis Communications.
825 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
826 we can now check for namespace violations and missing declarations. The
827 result is that almost all headers are now Unix-compliant (as defined in
828 the upcoming XPG6). The negative side is that some programs might need
829 corrections, too, if they depend on the incorrect form of the headers in
830 previous versions which defined too many symbols and included too many
833 * regex now handles multibyte character sets correctly.
834 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
836 * iconv (the program) does now conform to the upcoming XPG6 and handles
837 charmaps. Instead of the charset names the path of charmaps can be
838 provided and the conversion happens based on this data.
839 Contributed by Ulrich Drepper.
841 * The locale program now provides detailed information about the installed
846 only lists the names of the supported locales
850 provides details such as country, language, and codeset name.
851 Contributed by Ulrich Drepper.
855 * The gencat program now parses the input file according to the charset
856 selected by the LC_CTYPE category. This is important for stateful
857 character sets. To make generating catalogs easier there is a way
858 to overwrite the charset selected by the locale: before the first
859 message or $ quote line the catalog can contain a line like
863 to select the charset (ISO-8859-2 in this case).
865 Implemented by Shinya Hanataka and Ulrich Drepper.
867 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
868 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
869 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
871 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
872 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
874 * The LANGUAGE environment variable is now ignored unless the locale is
875 changed from the default "C" locale.
877 * The usual bug fixes.
881 * Greg McGary added runtime support for bounds checking using gcc's
882 new -fbounded-pointers option. ix86 target is complete. PowerPC
885 * Thorsten Kukuk added secure mode support to nscd.
887 * The Berkeley db libraries have been removed.
889 Related, the nss_db module is now in a separate package since it
890 obviously requires a database library being available.
892 * Wide character I/O streams implemented by Ulrich Drepper.
894 * Functions from the extended socket API added by Ulrich Drepper.
896 * Functions feenableexcept and fedisableexcept to control the
897 behaviour of individual exceptions have been added by Andreas Jaeger.
899 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
901 * The resolver code has been updated from bind 8.2.3-T5B which supports
902 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
905 This change could in some situations effect backward compatibility. Since
906 now `_res' is a thread-local instead of a global variable, modifying it
907 in one thread does not have any effect in other threads.
909 The resolver library was also extended to allow IPv6 as the transport
910 protocol for the requests. This work was done by Stig Venaas.
912 * Compatibility code for K&R C compilers has been removed from the
913 header files. A ISO C compiler is needed to use the library
914 (conforming to either C89 or C99 standard).
916 * Complete rewrite of the localedef program to support multibyte character
917 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
918 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
919 Implemented by Ulrich Drepper.
921 Bruno Haible significantly improved the generation and use of the data
922 structures for the wide character tables.
924 * Plural handling in gettext implemented by Ulrich Drepper.
926 * The utmp daemon has been removed.
928 * The port to MIPS-Linux has been finished by Andreas Jaeger.
930 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
933 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
935 * POSIX barriers implemented by Kaz Kylheku.
937 * POSIX spawn function family implemented by Ulrich Drepper.
939 * POSIX spinlocks are now available.
941 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
943 * the configure option --enable-kernel=X.Y.Z allows to strip out
944 compatibility for kernel versions before X.Y.Z. This is currently only
945 implemented for Linux.
947 * the sockaddr_in6 structure changed. The IPv6 working group added a new
948 field sin6_scope_id. This means that all programs using IPv6 should be
949 recompiled. Don't expect binary compatibility with previous glibc
952 * various conversion modules for IBM character sets contributed by
955 * IA-64 port by Jes Sorensen and HJ Lu.
957 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
958 Compiling the GNU C Library for Linux/ia64
959 ******************************************
961 Please refer to the file INSTALL in the same directory as you found
962 this file for general information about configuring and compiling
965 For general inquiries about glibc under Linux/ia64 please use the
966 following mailing list linux-ia64@linuxia64.org or one of the relevant
969 Recommended Tools for Compilation
970 =================================
972 In order for glibc-2.2 to build correctly on the ia64 you need at
973 least the following versions of the GNU tools (the :
975 * The Cygnus toolchain snapshot for the ia64 as of August 4
976 including the provided set of patches. It is however recommend
977 you use the October 24 toolchain snapshot or a more recent version.
979 OR alternatively you can try the following (the Cygnus toolchain is
980 the recommended solution):
982 * GCC and binutils, GAS and GNU LD out of CVS from
983 sources.redhat.com as of August 28, 2000 or later. The CVS tree
984 may require special patches to work properly on the ia64.
986 Configuring and compiling GNU Libc for Linux/ia64
987 =================================================
989 The library requires Linux kernel version 2.4.0-test4-000728 or
990 later to funtion properly. Besides that it support for debug libraries
991 is currently untested. Hence the following options
992 are required for configuring the library:
994 --disable-debug --enable-kernel=2.4.0
996 It is also important that you make sure the library picks up the
997 appropriate kernel header files, if you do not have recent enough
998 kernel headers in /usr/src/linux/include, you should use the
999 --with-headers=<path> option to specify the location.
1001 As an example I personally use the following options to configure
1006 --enable-kernel=2.4.0
1008 --enable-add-ons=yes
1010 --with-headers=/home/jes/linux/include
1015 Jes Sorensen <jes@linuxcare.com>,
1017 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1031 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1033 * New xdr functions are added; some rpc functions are now 64bit clean.
1035 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1037 * Fixed known incompatibilities with glibc 2.0.
1039 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1041 * Optimized a number of functions (especially the ELF dynamic loader).
1043 * Update timezone data files.
1045 * lots of charmaps corrections
1047 * some new locale definitions and charmaps
1052 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1053 conform to POSIX member type requirements. Symbol versions have been
1054 adjusted as needed within the library, and for direct use by applications,
1055 but there is potential for problems if third-party libraries use
1056 struct timeval as part of their interface. This does not present
1057 a problem for X and other "essential" system libraries.
1059 * An additional locale model to support C++ Standard Library locale
1060 model and probably more was implemented by Ulrich Drepper.
1062 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1065 * Miles Bader provided the `argp' function family to support hierachical
1066 command line argument parsing, layered on top of getopt.
1068 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1070 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1073 * scanf recognizes the %a and %A format for scanning floating point numbers.
1075 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1076 information and interfaces for the available integer types.
1078 * about 130 new math functions were added to implement the ISO C9x math
1081 * the new header <complex.h> contains definitions of the complex math
1082 functions from ISO C 9X.
1084 * the new header <tgmath.h> defines generic macros to use complex or
1085 real valued functions.
1087 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1089 * Andreas Jaeger provided a test suite for the math library.
1091 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1093 * Ulrich Drepper added character set conversion functions (iconv).
1095 * Optimized string functions have been added.
1097 * The localedata addon is now part of glibc.
1099 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1101 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1102 daemon for NSS (nscd).
1104 Missing a better place here are some numbers on improvements. Under
1105 Linux 2.1.125 un-tar-ing the kernel sources takes
1109 using local files 12.19s 6.88s 22.91s
1111 using NIS 13.92s 8.91s 26.34s
1113 using NIS & nscd 10.37s 7.34s 25.30s
1115 using NIS+ 27.57s 30.37s 640.46s
1117 using NIS+ & nscd 10.25s 7.83s 26.51s
1119 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1121 Keep in mind that non-namelookup related operations dominate above times.
1122 It was just a common complain that using NIS+ unpacking the kernel is
1125 [1] The old nscd implementation is not available anymore since it was
1126 distributed with glibc up to version 2.0.98 and thus is now replaced.
1128 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1130 * Mark Kettenis provided a Hesiod NSS module.
1132 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1133 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1135 * rcmd can now handle netgroups (Dick Streefland).
1137 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1140 * Support for the IPv6 protocol has been added to the socket API, as per the
1141 latest draft standards.
1143 * Support for Linux 2.2 has been added.
1145 * Interface changes relative to the latest 2.0.x release:
1146 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1147 addseverity NEW: Unix98
1148 alphasort64 NEW: LFS
1149 argp_err_exit_status NEW: argp, GNU ext
1150 argp_error NEW: argp, GNU ext
1151 argp_failure NEW: argp, GNU ext
1152 argp_help NEW: argp, GNU ext
1153 argp_parse NEW: argp, GNU ext
1154 argp_program_bug_address NEW: argp, GNU ext
1155 argp_program_version NEW: argp, GNU ext
1156 argp_program_version_hook NEW: argp, GNU ext
1157 argp_state_help NEW: argp, GNU ext
1158 argp_usage NEW: argp, GNU ext
1159 authdes_create NEW: Secure RPC
1160 authdes_getucred NEW: Secure RPC
1161 authdes_pk_create NEW: Secure RPC
1162 backtrace NEW: GNU ext.
1163 backtrace_symbols NEW: GNU ext.
1164 backtrace_symbols_fd NEW: GNU ext.
1166 cacosf NEW: ISO C 9x
1167 cacosh NEW: ISO C 9x
1168 cacoshf NEW: ISO C 9x
1169 cacoshl NEW: ISO C 9x
1170 cacosl NEW: ISO C 9x
1177 casinf NEW: ISO C 9x
1178 casinh NEW: ISO C 9x
1179 casinhf NEW: ISO C 9x
1180 casinhl NEW: ISO C 9x
1181 casinl NEW: ISO C 9x
1183 catanf NEW: ISO C 9x
1184 catanh NEW: ISO C 9x
1185 catanhf NEW: ISO C 9x
1186 catanhl NEW: ISO C 9x
1187 catanl NEW: ISO C 9x
1188 cbc_crypt NEW: Secure RPC
1192 ccoshf NEW: ISO C 9x
1193 ccoshl NEW: ISO C 9x
1199 cimagf NEW: ISO C 9x
1200 cimagl NEW: ISO C 9x
1201 clearerr_locked REMOVED
1202 clntunix_create NEW: sunrpc ext
1204 clog10 NEW: ISO C 9x
1205 clog10f NEW: ISO C 9x
1206 clog10l NEW: ISO C 9x
1216 cprojf NEW: ISO C 9x
1217 cprojl NEW: ISO C 9x
1219 crealf NEW: ISO C 9x
1220 creall NEW: ISO C 9x
1225 csinhf NEW: ISO C 9x
1226 csinhl NEW: ISO C 9x
1229 csqrtf NEW: ISO C 9x
1230 csqrtl NEW: ISO C 9x
1234 ctanhf NEW: ISO C 9x
1235 ctanhl NEW: ISO C 9x
1237 des_setparity NEW: Secure RPC
1238 ecb_crypt NEW: Secure RPC
1239 endutxent NEW: Unix98
1241 exp10f NEW: ISO C 9x
1242 exp10l NEW: ISO C 9x
1246 fattach NEW: STREAMS
1247 fdetach NEW: STREAMS
1251 feclearexcept NEW: ISO C 9x
1252 fegetenv NEW: ISO C 9x
1253 fegetexceptflag NEW: ISO C 9x
1254 fegetround NEW: ISO C 9x
1255 feholdexcept NEW: ISO C 9x
1257 feraiseexcept NEW: ISO C 9x
1258 ferror_locked REMOVED
1259 fesetenv NEW: ISO C 9x
1260 fesetexceptflag NEW: ISO C 9x
1261 fesetround NEW: ISO C 9x
1262 fetestexcept NEW: ISO C 9x
1263 feupdateenv NEW: ISO C 9x
1264 fflush_locked REMOVED
1268 fgets_unlocked NEW: GNU ext.
1269 fileno_locked REMOVED
1281 fputc_locked REMOVED
1282 fputs_unlocked NEW: GNU ext.
1283 fread_unlocked NEW: GNU ext.
1288 fstatvfs NEW: Unix98
1292 ftruncate64 NEW: LFS
1294 fwrite_unlocked NEW: GNU ext.
1295 gai_strerror NEW: IPv6
1299 getchar_locked REMOVED
1301 getdate_err NEW: Unix98
1302 getdate_r NEW: GNU ext.
1304 getnameinfo NEW: IPv6
1305 getnetname NEW: Secure RPC
1306 getpmsg NEW: STREAMS
1307 getpt NEW: Unix98 PTY
1308 getrlimit64 NEW: LFS
1309 getutxent NEW: Unix98
1310 getutxid NEW: Unix98
1311 getutxline NEW: Unix98
1312 glob64 NEW: GNU ext.
1313 globfree64 NEW: GNU ext.
1314 gnu_get_libc_release NEW: GNU ext.
1315 gnu_get_libc_version NEW: GNU ext.
1316 grantpt NEW: Unix98 PTY
1317 host2netname NEW: Secure RPC
1319 iconv_close NEW: iconv
1320 iconv_open NEW: iconv
1321 if_freenameindex NEW: IPv6
1322 if_indextoname NEW: IPv6
1323 if_nameindex NEW: IPv6
1324 if_nametoindex NEW: IPv6
1325 in6addr_any NEW: IPv6
1326 in6addr_loopback NEW: IPv6
1327 inet6_isipv4mapped NEW: IPv6
1328 isastream NEW: STREAMS
1329 iswblank NEW: GNU ext.
1330 key_decryptsession NEW: Secure RPC
1331 key_decryptsession_pk NEW: Secure RPC
1332 key_encryptsession NEW: Secure RPC
1333 key_encryptsession_pk NEW: Secure RPC
1334 key_gendes NEW: Secure RPC
1335 key_get_conv NEW: Secure RPC
1336 key_secretkey_is_set NEW: Secure RPC
1337 key_setnet NEW: Secure RPC
1338 key_setsecret NEW: Secure RPC
1339 llrint NEW: ISO C 9x
1340 llrintf NEW: ISO C 9x
1341 llrintl NEW: ISO C 9x
1342 llround NEW: ISO C 9x
1343 llroundf NEW: ISO C 9x
1344 llroundl NEW: ISO C 9x
1349 lrintf NEW: ISO C 9x
1350 lrintl NEW: ISO C 9x
1351 lround NEW: ISO C 9x
1352 lroundf NEW: ISO C 9x
1353 lroundl NEW: ISO C 9x
1355 makecontext NEW: Unix98
1356 mempcpy NEW: GNU ext.
1359 modify_ldt NEW: kernel
1363 nearbyint NEW: ISO C 9x
1364 nearbyintf NEW: ISO C 9x
1365 nearbyintl NEW: ISO C 9x
1366 netname2host NEW: Secure RPC
1367 netname2user NEW: Secure RPC
1368 nexttoward NEW: ISO C 9x
1369 nexttowardf NEW: ISO C 9x
1370 nexttowardl NEW: ISO C 9x
1374 passwd2des NEW: Secure RPC
1376 pow10f NEW: GNU ext.
1377 pow10l NEW: GNU ext.
1380 printf_size NEW: GNU ext.
1381 printf_size_info NEW: GNU ext.
1382 profil_counter REMOVED
1383 pthread_mutexattr_getkind_np REPLACED
1384 pthread_mutexattr_setkind_np REPLACED
1385 ptsname NEW: Unix98 PTY
1386 ptsname_r NEW: Unix98 PTY
1388 putchar_locked REMOVED
1389 putgrent NEW: GNU ext.
1391 putpmsg NEW: STREAMS
1392 pututxline NEW: Unix98
1396 readdir64_r NEW: LFS
1397 remquo NEW: ISO C 9x
1398 remquof NEW: ISO C 9x
1399 remquol NEW: ISO C 9x
1401 roundf NEW: ISO C 9x
1402 roundl NEW: ISO C 9x
1404 scalbln NEW: ISO C 9x
1405 scalblnf NEW: ISO C 9x
1406 scalblnl NEW: ISO C 9x
1408 sendfile NEW: kernel
1409 setcontext NEW: Unix98
1410 setrlimit64 NEW: LFS
1411 setutxent NEW: Unix98
1413 sigignore NEW: Unix98
1414 sigqueue NEW: POSIX.1b
1415 sigrelse NEW: Unix98
1416 sigset NEW: POSIX.1b
1417 sigtimedwait NEW: POSIX.1b
1418 sigwaitinfo NEW: POSIX.1b
1419 sincos NEW: GNU ext.
1420 sincosf NEW: GNU ext.
1421 sincosl NEW: GNU ext.
1425 strcasestr NEW: GNU ext.
1426 strtoimax NEW: ISO C 9x
1427 strtoumax NEW: ISO C 9x
1428 strverscmp NEW: GNU ext.
1429 svcauthdes_stats NEW: Secure RPC
1430 svcunix_create NEW: sunrpc etx
1431 svcunixfd_create NEW: sunrpc ext
1432 swapcontext NEW: Unix98
1433 tcgetsid NEW: Unix98 PTY
1434 tdestroy NEW: GNU ext.
1435 tgamma NEW: ISO C 9x
1436 tgammaf NEW: ISO C 9x
1437 tgammal NEW: ISO C 9x
1441 truncf NEW: ISO C 9x
1442 truncl NEW: ISO C 9x
1444 unlockpt NEW: Unix98 PTY
1445 updwtmpx NEW: Unix98
1446 user2netname NEW: Secure RPC
1447 utmpxname NEW: Unix98
1448 versionsort NEW: GNU ext.
1449 versionsort64 NEW: GNU ext.
1451 wcscasecmp NEW: GNU ext.
1452 wcsncasecmp NEW: GNU ext.
1453 wcsnlen NEW: GNU ext.
1454 wcstoimax NEW: ISO C 9x
1455 wcstoll NEW: ISO C 9x
1456 wcstoull NEW: ISO C 9x
1457 wcstoumax NEW: ISO C 9x
1459 wordexp NEW: POSIX.2
1460 wordfree NEW: POSIX.2
1461 write_profiling REMOVED
1462 xdecrypt NEW: Secure RPC
1463 xdr_authdes_cred NEW: Secure RPC
1464 xdr_authdes_verf NEW: Secure RPC
1465 xdr_cryptkeyarg NEW: Secure RPC
1466 xdr_cryptkeyarg2 NEW: Secure RPC
1467 xdr_cryptkeyres NEW: Secure RPC
1468 xdr_getcredres NEW: Secure RPC
1469 xdr_key_netstarg NEW: Secure RPC
1470 xdr_key_netstres NEW: Secure RPC
1471 xdr_keybuf NEW: Secure RPC
1472 xdr_keystatus NEW: Secure RPC
1473 xdr_netnamestr NEW: Secure RPC
1474 xdr_sizeof NEW: Secure RPC
1475 xdr_unixcred NEW: sunrpc ext
1476 xencrypt NEW: Secure RPC
1477 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1488 * inet_ntoa is thread-safe
1490 * updwtmp is moved from libutil to libc
1492 * rewrite of cbrt function
1494 * update of timezone data
1508 * add atoll function
1510 * fix complex problems in Berkeley DB code
1512 * fix math functions
1516 * fixed lots of header problems (especially Linux/GNU specific)
1518 * dynamic loader preserves all registers
1520 * Roland McGrath provided support for handling of auxiliary objects in
1521 the ELF dynamic loader.
1523 * support for parallel builds is improved
1527 * GNU extensions are no longer declared by default. To enable them you
1528 must define the macro `_GNU_SOURCE' in your program or compile with
1531 * The library has changed from using GNU ld symbol aliases to using weak
1532 symbols where available. The ELF object file format supports weak
1533 symbols; GNU ld also supports weak symbols in the a.out format. (There
1534 is also now support for other GNU ld extensions in ELF. Use the
1535 `--with-elf' option to configure to indicate you have ELF, and
1536 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1537 of many files which contained only symbol aliases, reducing the size of
1538 the source and the compiled library; many other files were renamed to
1539 less cryptic names previously occupied by the symbol alias files.
1540 There is a new header file <elf.h> for programs which operate on
1541 files in the ELF format.
1543 * Converted to Autoconf version 2, so `configure' has more options.
1544 Run `configure --help' to see the details.
1546 * The library can now be configured to build profiling, highly-optimized
1547 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1548 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1549 `configure' enable building these extra libraries. The shared library is
1550 built by default when using both ELF and GNU ld. When shared libraries
1551 are enabled, the new library `-ldl' is available for arbitrary run-time
1552 loading of shared objects; its interface is defined in <dlfcn.h>. The
1553 new header file <link.h> gives access to the internals of the run-time
1554 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1555 application of same name on other systems and it provides information
1556 about dynamically linked binaries.
1558 * The C library now provides the run-time support code for profiling
1559 executables compiled with `-pg'. Programs can control the profiling code
1560 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1561 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1562 the support for this file format was contributed by David Mosberger-Tang.
1564 * The math code has been replaced with a math library based on fdlibm from
1565 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1566 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1567 functions. The math functions now reside in a separate library, so
1568 programs using them will need to use `-lm' their linking commands.
1570 * John C. Bowman contributed optimized ix87 assembler inline functions.
1572 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1573 mechanism similar to that found in Solaris 2. This is now used for the
1574 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1575 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1576 file controls what services are used for each individual database. This
1577 works by loading shared libraries with names specified in `nsswitch.conf',
1578 so service modules can be changed or added at any time without even
1579 relinking any program. Currently there are the file, db, and NIS based
1580 NSS services available.
1582 * The new functions `strtoq' and `strtouq' parse integer values from
1583 strings, like `strtol' and `strtoul', but they return `long long int' and
1584 `unsigned long long int' values, respectively (64-bit quantities).
1586 * The new functions `strtof' and `strtold' parse floating-point values from
1587 strings, like `strtod', but they return `float' and `long double' values,
1588 respectively (on some machines `double' and `long double' are the same).
1590 * Ulrich Drepper has contributed new implementations of the floating-point
1591 printing and reading code used in the `printf' family of functions and
1592 `strtod', `strtof', and `strtold'. These new functions are perfectly
1593 accurate, and much faster than the old ones.
1595 * The implementation of the POSIX locale model was completely rewritten by
1596 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1597 to compile the POSIX locale definition.
1599 * The former dummy implementations of the strcoll and strxfrm function are
1600 now replaced by fully functional code contributed by Ulrich Drepper. The
1601 collation information comes from the POSIX locale definitions.
1603 * The new header <langinfo.h> defines an interface for accessing
1604 various locale-dependent data (using the locale chosen with `setlocale').
1606 * Ulrich Drepper has contributed a new suite of functions for operation on
1607 wide-character and multibyte-character strings, in <wchar.h>;
1608 and classification and case conversion of wide characters, in <wctype.h>.
1609 These new functions are conforming to the ISO C, Amendement 1 specification.
1611 * There is now a second implementation of the standard I/O library available.
1612 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1613 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1615 * You can now use positional parameter specifications in format strings
1616 for the `printf' and `scanf' families of functions. For example,
1617 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1618 ``Number 6, Mr Jones''. This is mainly useful when providing different
1619 format strings for different languages, whose grammars may dictate
1620 different orderings of the values being printed. To support this
1621 feature, the interface for `register_printf_handler' has changed; see
1622 the header file <printf.h> for details.
1624 * The `printf' and `scanf' families of functions now understand a new
1625 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1626 to group numbers as indicated by the locale; for `scanf' and friends, this
1627 says to accept as valid only a number with all the proper grouping
1628 separators in the right places. In the default "C" locale, numbers are
1629 not grouped; but locales for specific countries will define the usual
1630 conventions (i.e. separate thousands with `,' in the US locale).
1632 * The pgrp functions have been regularized, slightly incompatibly but much
1633 less confusingly. The core functions are now `getpgid' and `setpgid',
1634 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1635 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1636 provided for compatibility. There is no longer an incompatible `getpgrp'
1637 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1639 * The new header file <fts.h> and suite of functions simplify programs that
1640 operate on directory trees. This code comes from 4.4 BSD.
1642 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1643 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1644 NSS scheme used in glibc.
1646 * There is a new malloc debugging hook `__memalign_hook'.
1648 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1649 `unsigned int' in <sys/types.h>. These are for compatibility only and
1650 their use is discouraged.
1652 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1653 done differently, so that it works even without GNU ld.
1655 * New function `euidaccess' checks allowed access to a file like `access',
1656 but using the effective IDs instead of the real IDs.
1658 * The time zone data files have been updated for the latest and greatest
1659 local time conventions of the countries of the world.
1661 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1664 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1665 for formatting floating-point numbers. They are provided only for
1666 compatibility; new programs should use `sprintf' instead. There are
1667 also equivalent function for the `long double' floating-point type and
1668 all functions also exist in a reentrant form.
1670 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1671 functions for maintaining the login-record files (primarily of use to
1672 system programs such as `login'), and convenient functions for
1673 allocating and initializing a pseudo-terminal (pty) device.
1675 * Ulrich Drepper has contributed new support for System V style
1676 shared memory and IPC on systems that support it.
1678 * Ulrich Drepper has contributed several miscellaneous new functions found
1679 in System V: The `hsearch' family of functions provide an effective
1680 implementation of hash tables; `a64l' and `l64a' provide a very simple
1681 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1684 * Ulrich Drepper has contributed new reentrant counterparts for the
1685 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1687 * Ulrich Drepper has contributed new, highly-optimized versions of several
1688 string functions for the i486/Pentium family of processors.
1690 * Ulrich Drepper has updated the Linux-specific code, based largely
1691 on work done in Hongjiu Lu's version of GNU libc for Linux.
1692 The GNU library now supports Linux versions 2.0.10 and later,
1693 using the ELF object file format (i[3456]86-*-linux).
1695 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1697 * David Mosberger-Tang and Richard Henderson have ported the C library
1698 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1699 dynamic linking support for ELF/Alpha.
1701 * Richard Henderson contributed several Alpha optimized assembler function
1702 for arithmetic and string handling.
1704 * Ulrich Drepper has contributed a new set of message catalog functions to
1705 support multiple languages using the <libintl.h> interface, for use with
1706 his new package GNU gettext. Translation volunteers have contributed
1707 catalogs of the library's messages in Spanish, German, and Korean.
1709 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1710 program and the `catgets' function for reading the catalog files it
1711 creates. (The <libintl.h> interface is preferred; we include the
1712 <nl_types.h> interface using `catgets' only for source compatibility with
1713 programs already written to use it.)
1715 * New header file <values.h> gives SVID-compatible names for <limits.h>
1718 * Various new macros, declarations, and small header files for compatibility
1721 * New function `group_member' is a convenient way to check if a process has
1722 a given effective group ID.
1724 * When using GCC 2.7 and later, the socket functions are now declared in a
1725 special way so that passing an argument of type `struct sockaddr_in *',
1726 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1727 `struct sockaddr *' type, does not generate a type-clash warning.
1729 * New function `error' declared in header file <error.h> is a convenient
1730 function for printing error messages and optionally exiting; this is the
1731 canonical function used in GNU programs. The new functions `err', `warn',
1732 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1733 doing the same thing.
1735 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1736 POSIX.2 `glob' function to do ~ and {...} expansion.
1738 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1739 `clearenv' which is used in POSIX.9 is also available.
1741 * New function `getsid' returns session ID number on systems that support it.
1743 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1744 files <db.h> and <mpool.h> provide a rich set of functions for several
1745 types of simple databases stored in memory and in files, and <ndbm.h> is
1746 an old `ndbm'-compatible interface using the `db' functions. Link with
1747 `-ldb' to get these functions.
1749 * New macro `strdupa' copies a string like `strdup', but uses local stack
1750 space from `alloca' instead of dynamic heap space from `malloc'.
1752 * New function `strnlen' is like `strlen' but searches only a given maximum
1753 number of characters for the null terminator. `stpncpy', `strndup' and
1754 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1757 * New function `statfs' in header <sys/statfs.h>.
1759 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1760 provide convenient functions for operating on blocks of null-terminated
1763 * A new suite of functions in <utmp.h> handle all the details of reading
1764 and writing the utmp file.
1766 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1769 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1770 completely POSIX compliant and also implemented the extended functionality
1771 to handle alternate digit representation and alternate era date formats.
1773 * Ulrich Drepper provided an implementation of the `strptime' function
1774 defined in XPG4.2 which transforms a string into a `struct tm' value.
1776 * Paul Eggert provided the tzselect shell script as part of the timezone
1777 code. The shell script makes it easy to select the correct timezone
1780 * The implementation of the malloc family of functions is completely replaced
1781 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1782 The implementation uses the mmap function (if available) and it is
1783 optimized for the use in multi threaded programs.
1785 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1786 functions. This new functionality is usable by specifying a special
1787 salt string and it is compatible with implementation on *BSD systems.
1789 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1790 `getsubopt' to handle second level command line options, `bsd_signal'
1791 to access BSD style `signal' functionality, the obsolete `regexp' style
1794 * the `lchown' function is available on system which support this
1797 * The implementation of the shadow password handling function was contributed
1800 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1802 * POSIX.1g support was added. The <sys/select.h> header is available,
1803 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1804 implementation of `getaddrinfo'.
1808 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1810 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1811 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1813 * The new function `daemon' from 4.4 BSD is useful for server programs that
1814 want to put themselves in the background.
1816 * Joel Sherrill has contributed support for several standalone boards that
1817 run without an operating system.
1819 * `printf', `scanf' and friends now accept a `q' type modifier for long
1820 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1822 * All of the code taken from BSD (notably most of the math and networking
1823 routines) has been updated from the BSD 4.4-Lite release.
1825 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1827 * The new functions `getdomainname' and `setdomainname' fetch or change the
1828 YP/NIS domain name. These are system calls which exist on systems which
1831 * The time zone data files have been updated for the latest international
1834 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1835 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1839 * The C library now includes support for Sun RPC, from Sun's free
1840 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1841 are included. (There is still no support for YP.)
1843 * Tom Quinn has contributed a port of the C library to SGI machines running
1844 Irix 4 (mips-sgi-irix4).
1846 * The new `lockf' function is a simplified interface to the locking
1847 facilities of `fcntl', included for compatibility.
1849 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1851 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1853 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1856 * The error message printed by `assert' for a failed assertion now includes
1857 the name of the program (if using GNU ld) and the name of the calling
1858 function (with versions of GCC that support this).
1860 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1862 * The library now includes the <sys/mman.h> header file and memory
1863 management functions `mmap', `munmap', `mprotect', `msync', and
1864 `madvise', on systems that support those facilities.
1866 * The interface for `mcheck' has changed slightly: the function called to
1867 abort the program when an allocation inconsistency is detected now takes
1868 an argument that indicates the type of failure. The new function
1869 `mprobe' lets you request a consistency check for a particular block at
1870 any time (checks are normally done only when you call `free' or `realloc'
1873 * It is now possible to easily cross-compile the C library, building on one
1874 system a library to run on another machine and/or operating system. All
1875 you need to do is set the variable `HOST_CC' in `configparms' to the
1876 native compiler for programs to run on the machine you are building on (a
1877 few generator programs are used on Unix systems); set `CC' to the
1880 * The new function `fexecve' (only implemented on the GNU system) executes
1881 a program file given a file descriptor already open on the file.
1885 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1886 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1888 * You can set the variable `libprefix' in `configparms' to specify a prefix
1889 to be prepended to installed library files; this makes it easy to install
1890 the GNU C library to be linked as `-lgnuc' or whatever.
1892 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1893 copies a limited number of characters from a string, and returns the
1894 address of the last character written.
1896 * You no longer need to check for whether the installed `stddef.h' is
1897 compatible with the GNU C library. configure now checks for you.
1899 * You can now define a per-stream `fileno' function to convert the
1900 stream's cookie into an integral file descriptor.
1902 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1903 allocates zero bytes of storage, and returns a unique pointer which
1904 you can pass to `realloc' or `free'. The behavior is undefined if
1905 you dereference this pointer.
1907 * The C library now runs on Sony NEWS m68k machines running either
1908 NewsOS 3 or NewsOS 4.
1910 * The new `syscall' function is a system-dependent primitive function
1911 for invoking system calls. It has the canonical behavior on Unix
1912 systems, including unreliable return values for some calls (such as
1913 `pipe', `fork' and `getppid').
1915 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1916 to `EAGAIN', which is the preferred name. On systems whose kernels
1917 use two distinct codes, the C library now translates EWOULDBLOCK to
1918 EAGAIN in every system call function.
1922 * The GNU C Library Reference Manual is now distributed with the library.
1923 `make dvi' will produce a DVI file of the printed manual.
1924 `make info' will produce Info files that you can read on line using C-h i
1925 in Emacs or the `info' program.
1926 Please send comments on the manual to bug-glibc-manual@gnu.org.
1928 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1930 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1932 * Jason Merrill has contributed a port to the Sequent Symmetry running
1933 Dynix version 3 (i386-sequent-dynix).
1935 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1936 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1938 * New function `memory_warnings' lets you arrange to get warnings when
1939 malloc is running out of memory to allocate, like Emacs gives you.
1941 * The C library now contains the relocating allocator used in Emacs 19 for
1942 its editing buffers. This allocator (ralloc) minimizes allocation
1943 overhead and fragmentation by moving allocated regions around whenever it
1944 needs to. You always refer to a ralloc'd region with a "handle" (a
1945 pointer to a pointer--an object of type `void **').
1947 * There is a new `printf' format: `%m' gives you the string corresponding
1948 to the error code in `errno'.
1950 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1951 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1952 pass, the `a' modifier says to fill in a `char **' you pass with a
1955 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1956 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1957 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1959 * `mkstemp' is a traditional Unix function to atomically create and open a
1960 uniquely-named temporary file.
1964 * The standard location for the file that says what the local timezone is
1965 has changed again. It is now `/usr/local/etc/localtime' (or more
1966 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1968 * The distribution no longer contains any files with names longer than 14
1971 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1972 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1974 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1978 * The configuration process has changed quite a bit. The `configure'
1979 script is now used just like the configuration scripts for other GNU
1980 packages. The `sysdeps' directory hierarchy is much rearranged.
1981 The file `INSTALL' explains the new scheme in detail.
1983 * The header files no longer need to be processed into ANSI C and
1984 traditional C versions. There is just one set of files to install, and
1985 it will work with ANSI or old C compilers (including `gcc -traditional').
1987 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1988 MIPS DECStation running Ultrix 4.
1990 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1991 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1992 made itself into a shared library.
1994 * Yet further improved support for the i386, running 4.3 BSD-like systems
1995 (such as Mach 3 with the Unix single-server), or System V.
1997 * New function `strncasecmp' to do case-insensitive string comparison
1998 with limited length.
2000 * New function `strsep' is a reentrant alternative to `strtok'.
2002 * New functions `scandir' and `alphasort' for searching directories.
2004 * New function `setenv' is a better interface to `putenv'.
2006 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2007 function for traversing a directory tree.
2009 * The GNU obstack package is now also part of the C library.
2010 The new function `open_obstack_stream' creates a stdio stream that
2011 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2012 formatted output directly to an obstack.
2014 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2015 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2017 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2019 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2020 things to your strings.
2022 * There are some new test programs: test-fseek, testmb, and testrand.
2024 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2025 These ports are not finished, but are a good starting place for really
2026 supporting those systems.
2028 * `/etc/localtime' is now the standard location for the file that says what
2029 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2030 This follows the general principle that `/etc' is the place for all local
2031 configuration files.
2033 * The C library header files now use `extern "C"' when used by the C++
2034 compiler, so the C library should now work with C++ code.
2036 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2037 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2040 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2041 function which uses the `merge sort' algorithm, and is said to be
2042 significantly faster than the old GNU `qsort' function. Merge sort is
2043 now the standard `qsort' function. The new algorithm can require a lot
2044 of temporary storage; so, the old sorting function is called when the
2045 required storage is not available.
2047 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2048 provides the Unix `crypt' function, plus some other entry points.
2050 * The code and header files taken from 4.4 BSD have been updated with the
2051 latest files released from Berkeley.
2053 ----------------------------------------------------------------------
2054 Copyright information:
2056 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
2058 Permission is granted to anyone to make or distribute verbatim copies
2059 of this document as received, in any medium, provided that the
2060 copyright notice and this permission notice are preserved,
2061 thus giving the recipient permission to redistribute in turn.
2063 Permission is granted to distribute modified versions
2064 of this document, or of portions of it,
2065 under the above conditions, provided also that they
2066 carry prominent notices stating who last changed them.
2069 version-control: never