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1 GNU C Library NEWS -- history of user-visible changes. 2012-1-27
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.
7 \f
8 Version 2.16
10 * The following bugs are resolved with this release:
12 174, 350, 411, 2541, 2547, 2548, 3335, 3976, 3992, 4026, 4108, 4596, 4822,
13 5077, 5461, 5805, 5993, 6884, 6907, 6911, 9739, 9902, 10110, 10135, 10140,
14 10210, 10545, 10716, 11174, 11322, 11365, 11494, 12047, 13058, 13525,
15 13526, 13527, 13528, 13529, 13530, 13531, 13532, 13533, 13547, 13551,
16 13552, 13553, 13555, 13559, 13566, 13583, 13618, 13637, 13656, 13673,
17 13695, 13704, 13706, 13726, 13738, 13786, 13792, 13806, 13840, 13841,
18 13846
20 * ISO C11 support:
22 + define static_assert
24 + do not declare gets
26 + declare at_quick_exit and quick_exit also for ISO C11
28 + aligned_alloc. NB: The code is deliberately allows the size parameter
29 to not be a multiple of the alignment. This is a moronic requirement
30 in the standard but it is only a requirement on the caller, not the
31 implementation.
33 + timespec_get added
35 + uchar.h support added
37 + CMPLX, CMPLXF, CMPLXL added
39 Implemented by Ulrich Drepper.
41 * Support for the IA-64 is removed and could live in ports.
43 * Remove support for anything but ELF binary format
45 * Checking versions of poll, ppoll added.
46 Implemented by Ulrich Drepper.
48 * More generic and 64-bit performance optimizations to math functions.
49 Implemented by Ulrich Drepper.
50 \f
51 Version 2.15
53 * The following bugs are resolved with this release:
55 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
56 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
57 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
58 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
59 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
60 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
61 13484, 13506, 13515, 13523, 13524, 13538, 13540
63 * New program pldd to list loaded object of a process
64 Implemented by Ulrich Drepper.
66 * Add nss_db support back to glibc. No more dependency on Berkeley db
67 and support for initgroups lookups.
68 Implemented by Ulrich Drepper.
70 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
71 Contributed by HJ Lu.
73 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
74 Contributed by HJ Lu.
76 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
77 on x86-32 and x86-64.
78 Contributed by Liubov Dmitrieva.
80 * Optimized strchr and strrchr for SSE on x86-32.
81 Contributed by Liubov Dmitrieva.
83 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
84 for x86-64 and x86-32.
85 Contributed by Liubov Dmitrieva.
87 * New interfaces: scandirat, scandirat64
88 Implemented by Ulrich Drepper.
90 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
91 Implemented by Ulrich Drepper.
93 * nscd now also caches the netgroup database.
94 Implemented by Ulrich Drepper.
96 * Integrate libm with gcc's -ffinite-math-only option.
97 Implemented by Ulrich Drepper.
99 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
100 to math functions. Implemented by Ulrich Drepper.
102 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
103 Implemented by Ulrich Drepper.
105 * New Linux interfaces: process_vm_readv, process_vm_writev
107 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
108 Implemented by Ulrich Drepper.
110 * Optimized nearbyint and strcasecmp for PPC.
111 Implemented by Adhemerval Zanella.
113 * New locales: bho_IN, unm_US, es_CU, ta_LK
114 \f
115 Version 2.14
117 * The following bugs are resolved with this release:
119 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
120 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
121 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
122 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
123 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
124 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
125 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
126 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
127 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
128 12795, 12811, 12813, 12814, 12841
130 * The RPC implementation in libc is obsoleted. Old programs keep working
131 but new programs cannot be linked with the routines in libc anymore.
132 Programs in need of RPC functionality must be linked against TI-RPC.
133 The TI-RPC implementation is IPv6 enabled and there are other benefits.
135 Visible changes of this change include (obviously) the inability to link
136 programs using RPC functions without referencing the TI-RPC library and the
137 removal of the RPC headers from the glibc headers.
138 Implemented by Ulrich Drepper.
140 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
141 syncfs, setns, sendmmsg
143 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
144 yue_HK, lij_IT, mhr_RU
146 * New encodings: CP770, CP771, CP772, CP773, CP774
148 * New program sotruss to trace calls through PLTs
149 Implemented by Ulrich Drepper.
151 * The malloc hook implementation is marked deprecated and will be removed
152 from the default implementation in the next version. The design never
153 worked ever since the introduction of threads. Even programs which do
154 not create threads themselves can use multiple threads created internally.
155 \f
156 Version 2.13
158 * The following bugs are resolved with this release:
160 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
161 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
162 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
163 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
164 12378, 12394, 12397
166 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
168 * POWER7 optimizations: memset, memcmp, strncmp
170 * New optimized string functions for x86-64: strnlen (SSE2),
171 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
172 Implemented by Ulrich Drepper.
173 \f
174 Version 2.12
176 * The following bugs are resolved with this release:
178 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
179 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
180 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
181 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
182 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
183 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
184 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
185 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
187 * New interfaces: pthread_getname_np, pthread_setname_np
189 * New Linux interface: recvmmsg
191 * STT_GNU_IFUNC implemented for Sparc by David Miller.
193 * The dynamic linker now recognizes supported ABI versions from the
194 EI_ABIVERSION field in the ELF header.
195 Implemented by Ulrich Drepper.
197 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
198 will not be used to fill in password fields in the passwd.byname replies.
199 Instead it is used to synthesize the shadow.byname table, should it be
200 missing. This is a useful mode in some installations involving Solaris.
201 Implemented by Ulrich Drepper.
203 * New locales: kok_IN, sq_MK, cv_RU
204 \f
205 Version 2.11
207 * The following bugs are resolved with this release:
209 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
210 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
211 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
212 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
213 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
214 10789, 10817, 10823, 10840, 10847
216 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
217 mkostemps64
218 Implemented by Ulrich Drepper.
220 * Checking version of longjmp added that fails if an uninitialized stack
221 frame would be created. Implemented by Ulrich Drepper.
223 * STT_GNU_IFUNC is now supported in static executables.
224 Implemented by H.J. Lu.
226 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
228 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
229 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
230 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
231 Contributed by H.J. Lu.
233 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
234 Implemented by Ulrich Drepper.
236 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
237 strstr, strcasestr.
238 Contributed by H.J. Lu.
240 * Support for fma instruction in AVX on x86-64.
241 Implemented by H.J. Lu and Ulrich Drepper.
243 * AVX support in x86-64 auditing support in ld.so.
244 Implemented by H.J. Lu.
246 * STB_GNU_UNIQUE support added.
247 Implemented by Ulrich Drepper.
249 * Implement second fallback mode for optimized DNS lookup for even more
250 broken environments. If two requests from the same port are not
251 handled correctly close the socket and open a new one before sending
252 the second request. The 'single-request-reopen' option in /etc/resolv.conf
253 can be used to select this mode right away, instead of rediscovering the
254 necessity is every process again.
255 Implemented by Ulrich Drepper.
257 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
258 Implemented by Adam Tkac.
260 * Optimized iconv conversions for S390x.
261 Implemented by Andreas Krebbel.
263 * Using condvars with PI mutexes is now more efficient due to kernel
264 support for requeueing to PI futexes. NPTL support added for x86-64.
265 Implemented by Ulrich Drepper.
267 * New locales: ps_AF, my_MM
268 \f
269 Version 2.10
271 * The following bugs are resolved with this release:
273 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
274 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
275 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
276 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
277 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
279 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
280 Implemented by Ulrich Drepper.
282 * New Linux interfaces: accept4, fallocate, fallocate64.
283 Implemented by Ulrich Drepper.
285 * Correct declarations of string function when used in C++ code. This
286 could lead to compile errors for invalid C++ code.
288 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
289 now in POSIX.
291 * New POSIX 2008 interface: psiginfo
292 Implemented by Ulrich Drepper.
294 * New ISO C++1x interfaces: quick_exit, at_quick_exit
295 Implemented by Ulrich Drepper.
297 * Support for selecting between multiple function definitions at runtime
298 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
300 * The libcrypt library can now use the hash function implementations in
301 NSS. Implemented by Ulrich Drepper.
303 * The malloc implementation can be compiled to be less memory efficient
304 but higher performing in multi-threaded programs.
305 Implemented by Ulrich Drepper.
307 * New locales: nan_TW@latin, ks_IN
309 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
310 Implemented by Ulrich Drepper.
312 * Extended printf hook support. It is possible to use user-defined types
313 and extend existing format specifiers.
314 Implemented by Ulrich Drepper.
316 * Handling for group shadow files has been added.
317 Implemented by Ulrich Drepper.
319 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
320 servers (the case, e.g., for some people using the built-in DNS
321 server in ADSL modems/routers). There is a once-per-process timeout
322 in case of a broken server. To avoid it, users can run nscd or put
323 'options single-request' in /etc/resolv.conf.
324 Implemented by Ulrich Drepper.
325 \f
326 Version 2.9
328 * The following bugs are resolved with this release:
330 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
331 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
332 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
333 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
334 6968, 6974, 6980, 6995, 7008, 7009, 7029
336 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
337 up at the same time. Implemented by Ulrich Drepper.
339 * TLS descriptors for LD and GD on x86 and x86-64.
340 Implemented by Alexandre Oliva.
342 * getaddrinfo now handles DCCP and UDPlite.
343 Implemented by Ulrich Drepper.
345 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
346 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
347 Implemented by Ulrich Drepper.
349 * New implementation of memmem, strstr, and strcasestr which is O(n).
350 Implemented by Eric Blake.
352 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
354 * Implement "e" option for popen to open file descriptor with the
355 close-on-exec flag set. Implemented by Ulrich Drepper.
357 * Implement "b" mode for fmemopen. In this mode writes writes don't
358 implicitly add a NUL byte and seeks from the end of the buffer really
359 use the buffer end, not the string length as the basis.
360 Implemented by Ulrich Drepper.
362 * Many functions, exported and internal, now atomically set the close-on-exec
363 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
365 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
366 Sinhala)
367 Implemented by Pravin Satpute.
369 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
370 \f
371 Version 2.8
373 * The following bugs are resolved with this release:
375 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
376 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
377 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
378 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
379 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
380 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
381 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
383 * New locales: bo_CN, bo_IN, shs_CA.
385 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
387 * Sorting rules for some Indian languages (Devanagari and Gujarati).
388 Implemented by Pravin Satpute.
390 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
392 * nscd caches now all timeouts for DNS entries
393 Implemented by Ulrich Drepper.
395 * nscd is more efficient and wakes up less often.
396 Implemented by Ulrich Drepper.
398 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
399 vdprintf, and obstack_vprintf.
400 Implemented by Jakub Jelinek.
402 * Faster memset for x86-64.
403 Implemented by Harsha Jagasia and H.J. Lu.
405 * Faster memcpy on x86.
406 Implemented by Ulrich Drepper.
408 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
409 Implemented by Ulrich Drepper.
411 * Faster sqrt and sqrtf implemention for some PPC variants.
412 Implemented by Stephen Munroe.
413 \f
414 Version 2.7
416 * The following bugs are resolved with this release:
418 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
419 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
420 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
421 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
422 5071, 5103, 5104, 5112, 5113, 5184, 5186
424 * More checking functions: fread, fread_unlocked, open*, mq_open.
425 Implemented by Jakub Jelinek and Ulrich Drepper.
427 * Extend fortification to C++. Implemented by Jakub Jelinek.
429 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
430 by not recognizing 'a' as a modifier when those specs are requested.
431 Implemented by Jakub Jelinek.
433 * PPC optimizations to math and string functions.
434 Implemented by Steven Munroe.
436 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
437 options to be passed. Implemented by Ulrich Drepper.
439 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
441 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
442 Implemented by Ulrich Drepper.
444 * Handle private futexes in the NPTL implementation.
445 Implemented by Jakub Jelinek and Ulrich Drepper.
447 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
448 Implemented by Roland McGrath and Ulrich Drepper.
450 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
452 * SHA-256 and SHA-512 based password encryption.
453 Implemented by Ulrich Drepper.
455 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
456 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
457 yo_NG.
459 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
460 Implemented by Ulrich Drepper.
461 \f
462 Version 2.6
464 * The following bugs are resolved with this release:
466 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
467 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
468 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
469 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
470 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
471 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
472 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
473 4702, 4858
475 * New Linux interfaces: epoll_pwait, sched_getcpu.
477 * New generic interfaces: strerror_l.
479 * nscd can now cache the services database. Implemented by Ulrich Drepper.
480 \f
481 Version 2.5
483 * The following bugs are resolved with this release:
485 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
486 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
487 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
488 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
489 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
490 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
491 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
492 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
493 3225, 3251, 3252, 3253, 3273
495 * For Linux, the sorting of addresses returned by getaddrinfo now also
496 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
497 Implemented by Ulrich Drepper.
499 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
500 Implemented by Ulrich Drepper.
502 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
504 * New iconv module for MIK. Contributed by Alexander Shopov.
506 * For sites with broken group and/or passwd database, the auto-propagate
507 option of nscd can prevent creating ID lookup entries from the results
508 of a name lookup and vice versa. This usually is no problem but some
509 site might have problems with the default behavior.
510 Implemented by Ulrich Drepper.
512 * Iterating over entire database in NIS can be slow. With the
513 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
514 to trade time for memory. The entire database will be read at once.
515 Implemented by Ulrich Drepper.
517 * The interfaces introduced in RFC 3542 have been implemented by
518 Ulrich Drepper.
520 * Support for the new ELF hash table format was added by Ulrich Drepper.
522 * Support for priority inheritance mutexes added by Jakub Jelinek and
523 Ulrich Drepper.
525 * Support for priority protected mutexes added by Jakub Jelinek.
527 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
528 or_IN, csb_PL, fy_NL, sr_ME.
529 \f
530 Version 2.4
532 * More overflow detection functions.
534 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
535 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
537 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
538 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
539 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
540 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
541 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
542 by Masahide Washizawa.
544 * It is now possible to install audit libraries for the dynamic linker using
545 LD_AUDIT. Implemented by Ulrich Drepper.
547 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
548 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
549 For a libc and libpthread that works well on Linux 2.4 kernels, we
550 recommend using the stable 2.3 branch.
552 * The new function open_wmemstream acts like open_memstream,
553 but uses a wchar_t wide character buffer.
555 * The new function ppoll is an improved version of poll, similar to pselect.
557 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
558 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
559 renameat, unlinkat, linkat, symlinkat, readlinkat.
561 * New Linux kernel system calls: unshare,
562 inotify_init, inotify_add_watch, inotify_rm_watch.
564 * The euidaccess function is now also known by the alias eaccess,
565 for compatibility with some other systems.
567 * Timezone data updated to 2006b version.
568 \f
569 Version 2.3.6
571 * The following bugs are resolved with this release:
573 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
574 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
575 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
576 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
577 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
578 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
580 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
582 * As of this release, GCC 4 can be used to compile the C Library.
584 * Timezone data updated to 2005m version.
585 \f
586 Version 2.3.5
588 * The following bugs are resolved with this release:
590 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
591 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
592 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
593 777, 787, 821, 822, 823, 825
595 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
596 \f
597 Version 2.3.4
599 * Support for RFC 3678. Real implementations exist only for Linux so far.
600 Implemented by Ulrich Drepper.
602 * nscd can now cache entries persistently. Expiring entries are reloaded.
603 For speedups the cache can be shared in memory with client processes.
604 Implemented by Ulrich Drepper.
606 * nscd can now perform SELinux checks.
607 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
609 * getaddrinfo queries are now cached. Canonical name lookup is performed
610 efficiently.
611 Implemented by Ulrich Drepper.
613 * The nothrow function attribute is used when headers are used by gcc when
614 compiling C code. This can avoid significant amounts of exception
615 handling data.
617 * The malloc functions perform more error checking and are stricter when
618 it comes to reacting on errors. The default action is to terminate
619 the process after showing an error message. Implemented by Ulrich Drepper.
621 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
622 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
624 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
625 namespaces using the new function dlmopen(). This feature is of course,
626 like most other dynamic loading functionality, not available in statically
627 linked applications. Implemented by Ulrich Drepper.
629 * Low-overhead boundary checking variants of string and some stdio functions
630 were added. These are to be used in conjunction with a gcc patch by
631 Jakub Jelinek which adds calls to these functions if possible.
632 Implemented by Jakub Jelinek and Ulrich Drepper.
634 * Old code for several operating systems and machine architectures that
635 have not been in working condition in a long time have been removed from
636 the main source tree maintained by the GNU C Library's maintainers.
637 These files are now reside in the separate `ports' source module
638 that is usable as an add-on when building the library.
639 \f
640 Version 2.3.3
642 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
643 interrogate the dynamic linker, compatible with the Solaris interface.
645 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
646 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
648 * getifaddrs now uses the netlink interface on Linux to get its information.
649 Implemented by Thorsten Kukuk.
651 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
652 Implemented by Ulrich Drepper.
654 * support for non-executable stacks on x86 has been added. Changes mostly
655 by Roland McGrath.
657 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
658 and Ulrich Drepper.
660 * getaddrinfo now performs destination address selection according to
661 RFC 3484.
662 \f
663 Version 2.3.2
665 * Thread-safe interfaces for many functions that access locale data
666 were added in version 2.3, but these features were omitted from NEWS.
667 Many functions have variants with an `_l' suffix that take a `locale_t'
668 object as a parameter rather than consulting the current locale.
669 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
670 create and maintain `locale_t' objects. Additionally, the new function
671 `uselocale' sets "the current locale" (as used by functions not so
672 parameterized) set for an individual thread. These features were added
673 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
675 * The functions getresuid, getresgid, setresuid, and setresgid, which
676 have long been available on Linux, are now declared in <unistd.h>
677 and are now also available on the Hurd.
679 * ELF thread-local storage support (TLS) now works on x86-64.
681 * The new dynamic string token $LIB is expanded in shared library names.
682 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
684 * Aldy Hernandez contributed complete software floating point support for
685 PowerPC machines with no FPU.
687 * fexecve is implemented on Linux.
689 * The `btowc' function should work at least twice as fast due to
690 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
692 * With approriate thread add-ons cancelable functions are now implemented
693 in libc.so as well. No need to call the function in libpthread. This
694 change allowed to finally disable the incorrect and expensive handling
695 of weak definition in ld.so.
697 * Yet more PLT entries in libc.so have been removed. We finally arrived
698 at the bare minimum. Startup times improved appropriately.
700 * Support for the new Linux/x86 system call interface was added. The
701 AT_SYSINFO auxiliary vector entry is recognized and handled.
702 \f
703 Version 2.3
705 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
706 charsets.
708 * iconv (the program and the interface) now accepts empty names (excluding
709 options like //TRANSLIT) to mean "use charset of current locale".
711 * localedef can now transliterate characters in strings which are not in
712 the provided charmap. The information from the input locale is used.
714 * Prelinking support was added for ELF targets. This requires additional
715 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
717 * Read-only stdio streams now use mmap to speed up operation by eliminating
718 copying and buffer underflows. To use add 'm' to the mode string of
719 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
721 * The malloc functions were completely rewritten by Wolfram Gloger based
722 on Doug Lea's malloc-2.7.0.c.
724 * Isamu Hasegawa contributed a completely new and POSIX-conformant
725 implementation of regex.
727 * Bruno Haible upgraded the iconv and locale implementation to support
728 Unicode 3.2.
730 * Contents of the LC_* and LANG environment variables in the CEN style are
731 not recognized anymore. It never was used. Change by Ulrich Drepper.
733 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
734 thread-local storage (TLS) ABI on some platforms.
735 Changes by Ulrich Drepper. SH support by Kaz Kojima.
737 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
738 EUC-JISX0213, and TSCII.
740 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
741 BSD-compatible interface for getting all network interface addresses.
742 Implementation for IPv4 by Roland McGrath.
744 * Loading of locale data is faster due to the introduction of a locale
745 archive. Implemented by Roland McGrath and Ulrich Drepper.
747 * Startup times are significantly reduced by not using exported functions
748 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
749 and Ulrich Drepper.
751 * Steven Munroe contributed a port to PowerPC64/Linux.
752 \f
753 Version 2.2.6
755 * The Hurd now uses the GNU libio implementation of stdio rather than the
756 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
758 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
759 with the same behavior as the Linux system call of the same name.
760 \f
761 Version 2.2.5
763 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
764 128-bit long double format.
766 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
767 IBM1161, and IBM1162 charsets.
769 * Andreas Jaeger contributed a port to x86-64/Linux.
771 * Peter Bruin contributed a port to PowerPC/Hurd.
773 * libc functions using I/O streams now can handle wide-oriented streams
774 as well.
776 * optimizations in the dynamic linker. Binaries created by recent binutils
777 versions start up quicker due to reduced time spent on relocations.
779 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
780 \f
781 Version 2.2.4
783 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
784 asinh, atanh, j0 for the 128-bit long double format.
786 * Bruno Haible updated all the code handling Unicode in some form to
787 support Unicode 3.1.
789 * Speed of regex for single-byte locales is back to previous levels.
790 Patch by Isamu Hasegawa.
792 * Alpha, SPARC, and IA-64 now also using floating stacks.
794 * Startup time of internationalized applications greatly improved through
795 iconv cache. Use iconvconfig to generate the cache file.
796 Contributed by Ulrich Drepper.
798 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
799 severe performance problems. Patch by David Mosberger.
801 * The Hurd port got a lot more functionality like AIO, various stdio
802 extensions, etc. Mainly done by Roland McGrath.
804 * mtrace can now lookup symbols in shared libraries.
805 \f
806 Version 2.2.3
808 * Intel's IA-64 math library is largely integrated. It provides fast and
809 accurate implementatations for most basic and standard math functions
810 in float, double, and long double format.
812 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
813 and asin for the 96-bit long double format and asin, log, tan for the
814 128-bit long double format.
816 * The beginning of a last-bit accurate math library by IBM Haifa were added.
817 The basic double functions exist today. Contributed by Abraham Ziv
818 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
819 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
821 * An asynchronous name lookup library was added. The interface is designed
822 after POSIX AIO. The proposal was circulated beforehand to get comments.
823 No negative ones came in. Implemented by Ulrich Drepper.
825 * Port to S390/64bit contributed by Martin Schwidefsky
826 <schwidefsky@de.ibm.com>.
828 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
829 of functions for Linux/IA-64.
831 * The RPC code is now thread safe. Threads can now use the same service
832 of different services at the same time. Patch by Eric Norum
833 <eric.norum@usask.ca> with some help by Ulrich Drepper.
835 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
836 family of functions for Linux/S390.
838 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
839 of functions for Linux/x86.
841 * Port to Linux/CRIS contributed by Axis Communications.
842 \f
843 Version 2.2.2
845 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
846 we can now check for namespace violations and missing declarations. The
847 result is that almost all headers are now Unix-compliant (as defined in
848 the upcoming XPG6). The negative side is that some programs might need
849 corrections, too, if they depend on the incorrect form of the headers in
850 previous versions which defined too many symbols and included too many
851 other headers.
853 * regex now handles multibyte character sets correctly.
854 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
856 * iconv (the program) does now conform to the upcoming XPG6 and handles
857 charmaps. Instead of the charset names the path of charmaps can be
858 provided and the conversion happens based on this data.
859 Contributed by Ulrich Drepper.
861 * The locale program now provides detailed information about the installed
862 locales. While
864 locale -a
866 only lists the names of the supported locales
868 locale -a --verbose
870 provides details such as country, language, and codeset name.
871 Contributed by Ulrich Drepper.
872 \f
873 Version 2.2.1
875 * The gencat program now parses the input file according to the charset
876 selected by the LC_CTYPE category. This is important for stateful
877 character sets. To make generating catalogs easier there is a way
878 to overwrite the charset selected by the locale: before the first
879 message or $ quote line the catalog can contain a line like
881 $ codeset=ISO-8859-2
883 to select the charset (ISO-8859-2 in this case).
885 Implemented by Shinya Hanataka and Ulrich Drepper.
887 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
888 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
889 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
891 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
892 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
894 * The LANGUAGE environment variable is now ignored unless the locale is
895 changed from the default "C" locale.
897 * The usual bug fixes.
898 \f
899 Version 2.2
901 * Greg McGary added runtime support for bounds checking using gcc's
902 new -fbounded-pointers option. ix86 target is complete. PowerPC
903 is in progress.
905 * Thorsten Kukuk added secure mode support to nscd.
907 * The Berkeley db libraries have been removed.
909 Related, the nss_db module is now in a separate package since it
910 obviously requires a database library being available.
912 * Wide character I/O streams implemented by Ulrich Drepper.
914 * Functions from the extended socket API added by Ulrich Drepper.
916 * Functions feenableexcept and fedisableexcept to control the
917 behaviour of individual exceptions have been added by Andreas Jaeger.
919 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
921 * The resolver code has been updated from bind 8.2.3-T5B which supports
922 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
923 and Mark Kettenis.
925 This change could in some situations effect backward compatibility. Since
926 now `_res' is a thread-local instead of a global variable, modifying it
927 in one thread does not have any effect in other threads.
929 The resolver library was also extended to allow IPv6 as the transport
930 protocol for the requests. This work was done by Stig Venaas.
932 * Compatibility code for K&R C compilers has been removed from the
933 header files. A ISO C compiler is needed to use the library
934 (conforming to either C89 or C99 standard).
936 * Complete rewrite of the localedef program to support multibyte character
937 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
938 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
939 Implemented by Ulrich Drepper.
941 Bruno Haible significantly improved the generation and use of the data
942 structures for the wide character tables.
944 * Plural handling in gettext implemented by Ulrich Drepper.
946 * The utmp daemon has been removed.
948 * The port to MIPS-Linux has been finished by Andreas Jaeger.
950 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
951 and Yutaka Niibe.
953 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
955 * POSIX barriers implemented by Kaz Kylheku.
957 * POSIX spawn function family implemented by Ulrich Drepper.
959 * POSIX spinlocks are now available.
961 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
963 * the configure option --enable-kernel=X.Y.Z allows to strip out
964 compatibility for kernel versions before X.Y.Z. This is currently only
965 implemented for Linux.
967 * the sockaddr_in6 structure changed. The IPv6 working group added a new
968 field sin6_scope_id. This means that all programs using IPv6 should be
969 recompiled. Don't expect binary compatibility with previous glibc
970 versions.
972 * various conversion modules for IBM character sets contributed by
973 Masahide Washizawa.
975 * IA-64 port by Jes Sorensen and HJ Lu.
977 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
978 Compiling the GNU C Library for Linux/ia64
979 ******************************************
981 Please refer to the file INSTALL in the same directory as you found
982 this file for general information about configuring and compiling
983 glibc.
985 For general inquiries about glibc under Linux/ia64 please use the
986 following mailing list linux-ia64@linuxia64.org or one of the relevant
987 glibc mailing lists.
989 Recommended Tools for Compilation
990 =================================
992 In order for glibc-2.2 to build correctly on the ia64 you need at
993 least the following versions of the GNU tools (the :
995 * The Cygnus toolchain snapshot for the ia64 as of August 4
996 including the provided set of patches. It is however recommend
997 you use the October 24 toolchain snapshot or a more recent version.
999 OR alternatively you can try the following (the Cygnus toolchain is
1000 the recommended solution):
1002 * GCC and binutils, GAS and GNU LD out of CVS from
1003 sources.redhat.com as of August 28, 2000 or later. The CVS tree
1004 may require special patches to work properly on the ia64.
1006 Configuring and compiling GNU Libc for Linux/ia64
1007 =================================================
1009 The library requires Linux kernel version 2.4.0-test4-000728 or
1010 later to funtion properly. Besides that it support for debug libraries
1011 is currently untested. Hence the following options
1012 are required for configuring the library:
1014 --disable-debug --enable-kernel=2.4.0
1016 It is also important that you make sure the library picks up the
1017 appropriate kernel header files, if you do not have recent enough
1018 kernel headers in /usr/src/linux/include, you should use the
1019 --with-headers=<path> option to specify the location.
1021 As an example I personally use the following options to configure
1022 the library:
1024 --disable-debug
1025 --disable-cvs
1026 --enable-kernel=2.4.0
1027 --host=ia64-linux
1028 --enable-add-ons=yes
1029 --prefix=/usr
1030 --with-headers=/home/jes/linux/include
1033 Good luck
1035 Jes Sorensen <jes@linuxcare.com>,
1036 November 14th, 2000
1037 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1038 \f
1039 Version 2.1.3
1041 * bug fixes
1043 \f
1044 Version 2.1.2
1046 * bug fixes
1048 \f
1049 Version 2.1.1
1051 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1053 * New xdr functions are added; some rpc functions are now 64bit clean.
1055 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1057 * Fixed known incompatibilities with glibc 2.0.
1059 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1061 * Optimized a number of functions (especially the ELF dynamic loader).
1063 * Update timezone data files.
1065 * lots of charmaps corrections
1067 * some new locale definitions and charmaps
1069 \f
1070 Version 2.1
1072 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1073 conform to POSIX member type requirements. Symbol versions have been
1074 adjusted as needed within the library, and for direct use by applications,
1075 but there is potential for problems if third-party libraries use
1076 struct timeval as part of their interface. This does not present
1077 a problem for X and other "essential" system libraries.
1079 * An additional locale model to support C++ Standard Library locale
1080 model and probably more was implemented by Ulrich Drepper.
1082 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1083 symbol level.
1085 * Miles Bader provided the `argp' function family to support hierachical
1086 command line argument parsing, layered on top of getopt.
1088 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1090 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1091 numbers.
1093 * scanf recognizes the %a and %A format for scanning floating point numbers.
1095 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1096 information and interfaces for the available integer types.
1098 * about 130 new math functions were added to implement the ISO C9x math
1099 library.
1101 * the new header <complex.h> contains definitions of the complex math
1102 functions from ISO C 9X.
1104 * the new header <tgmath.h> defines generic macros to use complex or
1105 real valued functions.
1107 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1109 * Andreas Jaeger provided a test suite for the math library.
1111 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1113 * Ulrich Drepper added character set conversion functions (iconv).
1115 * Optimized string functions have been added.
1117 * The localedata addon is now part of glibc.
1119 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1121 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1122 daemon for NSS (nscd).
1124 Missing a better place here are some numbers on improvements. Under
1125 Linux 2.1.125 un-tar-ing the kernel sources takes
1127 user system wall
1129 using local files 12.19s 6.88s 22.91s
1131 using NIS 13.92s 8.91s 26.34s
1133 using NIS & nscd 10.37s 7.34s 25.30s
1135 using NIS+ 27.57s 30.37s 640.46s
1137 using NIS+ & nscd 10.25s 7.83s 26.51s
1139 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1141 Keep in mind that non-namelookup related operations dominate above times.
1142 It was just a common complain that using NIS+ unpacking the kernel is
1143 horribly slow.
1145 [1] The old nscd implementation is not available anymore since it was
1146 distributed with glibc up to version 2.0.98 and thus is now replaced.
1148 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1150 * Mark Kettenis provided a Hesiod NSS module.
1152 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1153 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1155 * rcmd can now handle netgroups (Dick Streefland).
1157 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1158 Bambrough.
1160 * Support for the IPv6 protocol has been added to the socket API, as per the
1161 latest draft standards.
1163 * Support for Linux 2.2 has been added.
1165 * Interface changes relative to the latest 2.0.x release:
1166 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1167 addseverity NEW: Unix98
1168 alphasort64 NEW: LFS
1169 argp_err_exit_status NEW: argp, GNU ext
1170 argp_error NEW: argp, GNU ext
1171 argp_failure NEW: argp, GNU ext
1172 argp_help NEW: argp, GNU ext
1173 argp_parse NEW: argp, GNU ext
1174 argp_program_bug_address NEW: argp, GNU ext
1175 argp_program_version NEW: argp, GNU ext
1176 argp_program_version_hook NEW: argp, GNU ext
1177 argp_state_help NEW: argp, GNU ext
1178 argp_usage NEW: argp, GNU ext
1179 authdes_create NEW: Secure RPC
1180 authdes_getucred NEW: Secure RPC
1181 authdes_pk_create NEW: Secure RPC
1182 backtrace NEW: GNU ext.
1183 backtrace_symbols NEW: GNU ext.
1184 backtrace_symbols_fd NEW: GNU ext.
1185 cacos NEW: ISO C 9x
1186 cacosf NEW: ISO C 9x
1187 cacosh NEW: ISO C 9x
1188 cacoshf NEW: ISO C 9x
1189 cacoshl NEW: ISO C 9x
1190 cacosl NEW: ISO C 9x
1191 capget NEW: kernel
1192 capset NEW: kernel
1193 carg NEW: ISO C 9x
1194 cargf NEW: ISO C 9x
1195 cargl NEW: ISO C 9x
1196 casin NEW: ISO C 9x
1197 casinf NEW: ISO C 9x
1198 casinh NEW: ISO C 9x
1199 casinhf NEW: ISO C 9x
1200 casinhl NEW: ISO C 9x
1201 casinl NEW: ISO C 9x
1202 catan NEW: ISO C 9x
1203 catanf NEW: ISO C 9x
1204 catanh NEW: ISO C 9x
1205 catanhf NEW: ISO C 9x
1206 catanhl NEW: ISO C 9x
1207 catanl NEW: ISO C 9x
1208 cbc_crypt NEW: Secure RPC
1209 ccos NEW: ISO C 9x
1210 ccosf NEW: ISO C 9x
1211 ccosh NEW: ISO C 9x
1212 ccoshf NEW: ISO C 9x
1213 ccoshl NEW: ISO C 9x
1214 ccosl NEW: ISO C 9x
1215 cexp NEW: ISO C 9x
1216 cexpf NEW: ISO C 9x
1217 cexpl NEW: ISO C 9x
1218 cimag NEW: ISO C 9x
1219 cimagf NEW: ISO C 9x
1220 cimagl NEW: ISO C 9x
1221 clearerr_locked REMOVED
1222 clntunix_create NEW: sunrpc ext
1223 clog NEW: ISO C 9x
1224 clog10 NEW: ISO C 9x
1225 clog10f NEW: ISO C 9x
1226 clog10l NEW: ISO C 9x
1227 clogf NEW: ISO C 9x
1228 clogl NEW: ISO C 9x
1229 conj NEW: ISO C 9x
1230 conjf NEW: ISO C 9x
1231 conjl NEW: ISO C 9x
1232 cpow NEW: ISO C 9x
1233 cpowf NEW: ISO C 9x
1234 cpowl NEW: ISO C 9x
1235 cproj NEW: ISO C 9x
1236 cprojf NEW: ISO C 9x
1237 cprojl NEW: ISO C 9x
1238 creal NEW: ISO C 9x
1239 crealf NEW: ISO C 9x
1240 creall NEW: ISO C 9x
1241 creat64 NEW: LFS
1242 csin NEW: ISO C 9x
1243 csinf NEW: ISO C 9x
1244 csinh NEW: ISO C 9x
1245 csinhf NEW: ISO C 9x
1246 csinhl NEW: ISO C 9x
1247 csinl NEW: ISO C 9x
1248 csqrt NEW: ISO C 9x
1249 csqrtf NEW: ISO C 9x
1250 csqrtl NEW: ISO C 9x
1251 ctan NEW: ISO C 9x
1252 ctanf NEW: ISO C 9x
1253 ctanh NEW: ISO C 9x
1254 ctanhf NEW: ISO C 9x
1255 ctanhl NEW: ISO C 9x
1256 ctanl NEW: ISO C 9x
1257 des_setparity NEW: Secure RPC
1258 ecb_crypt NEW: Secure RPC
1259 endutxent NEW: Unix98
1260 exp10 NEW: ISO C 9x
1261 exp10f NEW: ISO C 9x
1262 exp10l NEW: ISO C 9x
1263 exp2 NEW: ISO C 9x
1264 exp2f NEW: ISO C 9x
1265 exp2l NEW: ISO C 9x
1266 fattach NEW: STREAMS
1267 fdetach NEW: STREAMS
1268 fdim NEW: ISO C 9x
1269 fdimf NEW: ISO C 9x
1270 fdiml NEW: ISO C 9x
1271 feclearexcept NEW: ISO C 9x
1272 fegetenv NEW: ISO C 9x
1273 fegetexceptflag NEW: ISO C 9x
1274 fegetround NEW: ISO C 9x
1275 feholdexcept NEW: ISO C 9x
1276 feof_locked REMOVED
1277 feraiseexcept NEW: ISO C 9x
1278 ferror_locked REMOVED
1279 fesetenv NEW: ISO C 9x
1280 fesetexceptflag NEW: ISO C 9x
1281 fesetround NEW: ISO C 9x
1282 fetestexcept NEW: ISO C 9x
1283 feupdateenv NEW: ISO C 9x
1284 fflush_locked REMOVED
1285 ffsl NEW: GNU ext.
1286 ffsll NEW: GNU ext.
1287 fgetpos64 NEW: LFS
1288 fgets_unlocked NEW: GNU ext.
1289 fileno_locked REMOVED
1290 fma NEW: ISO C 9x
1291 fmaf NEW: ISO C 9x
1292 fmal NEW: ISO C 9x
1293 fmax NEW: ISO C 9x
1294 fmaxf NEW: ISO C 9x
1295 fmaxl NEW: ISO C 9x
1296 fmin NEW: ISO C 9x
1297 fminf NEW: ISO C 9x
1298 fminl NEW: ISO C 9x
1299 fmtmsg NEW: Unix98
1300 fopen64 NEW: LFS
1301 fputc_locked REMOVED
1302 fputs_unlocked NEW: GNU ext.
1303 fread_unlocked NEW: GNU ext.
1304 freopen64 NEW: LFS
1305 fseeko NEW: Unix98
1306 fsetpos64 NEW: LFS
1307 fstatfs64 NEW: LFS
1308 fstatvfs NEW: Unix98
1309 fstatvfs64 NEW: LFS
1310 ftello NEW: Unix98
1311 ftello64 NEW: LFS
1312 ftruncate64 NEW: LFS
1313 ftw64 NEW: LFS
1314 fwrite_unlocked NEW: GNU ext.
1315 gai_strerror NEW: IPv6
1316 gamma_r REMOVED
1317 gammaf_r REMOVED
1318 gammal_r REMOVED
1319 getchar_locked REMOVED
1320 getdate NEW: Unix98
1321 getdate_err NEW: Unix98
1322 getdate_r NEW: GNU ext.
1323 getmsg NEW: STREAMS
1324 getnameinfo NEW: IPv6
1325 getnetname NEW: Secure RPC
1326 getpmsg NEW: STREAMS
1327 getpt NEW: Unix98 PTY
1328 getrlimit64 NEW: LFS
1329 getutxent NEW: Unix98
1330 getutxid NEW: Unix98
1331 getutxline NEW: Unix98
1332 glob64 NEW: GNU ext.
1333 globfree64 NEW: GNU ext.
1334 gnu_get_libc_release NEW: GNU ext.
1335 gnu_get_libc_version NEW: GNU ext.
1336 grantpt NEW: Unix98 PTY
1337 host2netname NEW: Secure RPC
1338 iconv NEW: iconv
1339 iconv_close NEW: iconv
1340 iconv_open NEW: iconv
1341 if_freenameindex NEW: IPv6
1342 if_indextoname NEW: IPv6
1343 if_nameindex NEW: IPv6
1344 if_nametoindex NEW: IPv6
1345 in6addr_any NEW: IPv6
1346 in6addr_loopback NEW: IPv6
1347 inet6_isipv4mapped NEW: IPv6
1348 isastream NEW: STREAMS
1349 iswblank NEW: GNU ext.
1350 key_decryptsession NEW: Secure RPC
1351 key_decryptsession_pk NEW: Secure RPC
1352 key_encryptsession NEW: Secure RPC
1353 key_encryptsession_pk NEW: Secure RPC
1354 key_gendes NEW: Secure RPC
1355 key_get_conv NEW: Secure RPC
1356 key_secretkey_is_set NEW: Secure RPC
1357 key_setnet NEW: Secure RPC
1358 key_setsecret NEW: Secure RPC
1359 llrint NEW: ISO C 9x
1360 llrintf NEW: ISO C 9x
1361 llrintl NEW: ISO C 9x
1362 llround NEW: ISO C 9x
1363 llroundf NEW: ISO C 9x
1364 llroundl NEW: ISO C 9x
1365 log2 NEW: ISO C 9x
1366 log2f NEW: ISO C 9x
1367 log2l NEW: ISO C 9x
1368 lrint NEW: ISO C 9x
1369 lrintf NEW: ISO C 9x
1370 lrintl NEW: ISO C 9x
1371 lround NEW: ISO C 9x
1372 lroundf NEW: ISO C 9x
1373 lroundl NEW: ISO C 9x
1374 lseek64 NEW: LFS
1375 makecontext NEW: Unix98
1376 mempcpy NEW: GNU ext.
1377 mmap64 NEW: LFS
1378 moncontrol REMOVED
1379 modify_ldt NEW: kernel
1380 nan NEW: ISO C 9x
1381 nanf NEW: ISO C 9x
1382 nanl NEW: ISO C 9x
1383 nearbyint NEW: ISO C 9x
1384 nearbyintf NEW: ISO C 9x
1385 nearbyintl NEW: ISO C 9x
1386 netname2host NEW: Secure RPC
1387 netname2user NEW: Secure RPC
1388 nexttoward NEW: ISO C 9x
1389 nexttowardf NEW: ISO C 9x
1390 nexttowardl NEW: ISO C 9x
1391 nftw NEW: Unix98
1392 nftw64 NEW: LFS
1393 open64 NEW: LFS
1394 passwd2des NEW: Secure RPC
1395 pow10 NEW: GNU ext.
1396 pow10f NEW: GNU ext.
1397 pow10l NEW: GNU ext.
1398 pread NEW: Unix98
1399 pread64 NEW: LFS
1400 printf_size NEW: GNU ext.
1401 printf_size_info NEW: GNU ext.
1402 profil_counter REMOVED
1403 pthread_mutexattr_getkind_np REPLACED
1404 pthread_mutexattr_setkind_np REPLACED
1405 ptsname NEW: Unix98 PTY
1406 ptsname_r NEW: Unix98 PTY
1407 putc_locked REMOVED
1408 putchar_locked REMOVED
1409 putgrent NEW: GNU ext.
1410 putmsg NEW: STREAMS
1411 putpmsg NEW: STREAMS
1412 pututxline NEW: Unix98
1413 pwrite NEW: Unix98
1414 pwrite64 NEW: LFS
1415 readdir64 NEW: LFS
1416 readdir64_r NEW: LFS
1417 remquo NEW: ISO C 9x
1418 remquof NEW: ISO C 9x
1419 remquol NEW: ISO C 9x
1420 round NEW: ISO C 9x
1421 roundf NEW: ISO C 9x
1422 roundl NEW: ISO C 9x
1423 rtime NEW: GNU ext.
1424 scalbln NEW: ISO C 9x
1425 scalblnf NEW: ISO C 9x
1426 scalblnl NEW: ISO C 9x
1427 scandir64 NEW: LFS
1428 sendfile NEW: kernel
1429 setcontext NEW: Unix98
1430 setrlimit64 NEW: LFS
1431 setutxent NEW: Unix98
1432 sighold NEW: Unix98
1433 sigignore NEW: Unix98
1434 sigqueue NEW: POSIX.1b
1435 sigrelse NEW: Unix98
1436 sigset NEW: POSIX.1b
1437 sigtimedwait NEW: POSIX.1b
1438 sigwaitinfo NEW: POSIX.1b
1439 sincos NEW: GNU ext.
1440 sincosf NEW: GNU ext.
1441 sincosl NEW: GNU ext.
1442 statfs64 NEW: LFS
1443 statvfs NEW: Unix98
1444 statvfs64 NEW: LFS
1445 strcasestr NEW: GNU ext.
1446 strtoimax NEW: ISO C 9x
1447 strtoumax NEW: ISO C 9x
1448 strverscmp NEW: GNU ext.
1449 svcauthdes_stats NEW: Secure RPC
1450 svcunix_create NEW: sunrpc etx
1451 svcunixfd_create NEW: sunrpc ext
1452 swapcontext NEW: Unix98
1453 tcgetsid NEW: Unix98 PTY
1454 tdestroy NEW: GNU ext.
1455 tgamma NEW: ISO C 9x
1456 tgammaf NEW: ISO C 9x
1457 tgammal NEW: ISO C 9x
1458 tmpfile64 NEW: LFS
1459 trunc NEW: ISO C 9x
1460 truncate64 NEW: LFS
1461 truncf NEW: ISO C 9x
1462 truncl NEW: ISO C 9x
1463 umount2 NEW: kernel
1464 unlockpt NEW: Unix98 PTY
1465 updwtmpx NEW: Unix98
1466 user2netname NEW: Secure RPC
1467 utmpxname NEW: Unix98
1468 versionsort NEW: GNU ext.
1469 versionsort64 NEW: GNU ext.
1470 waitid NEW: Unix98
1471 wcscasecmp NEW: GNU ext.
1472 wcsncasecmp NEW: GNU ext.
1473 wcsnlen NEW: GNU ext.
1474 wcstoimax NEW: ISO C 9x
1475 wcstoll NEW: ISO C 9x
1476 wcstoull NEW: ISO C 9x
1477 wcstoumax NEW: ISO C 9x
1478 wcswcs NEW: Unix98
1479 wordexp NEW: POSIX.2
1480 wordfree NEW: POSIX.2
1481 write_profiling REMOVED
1482 xdecrypt NEW: Secure RPC
1483 xdr_authdes_cred NEW: Secure RPC
1484 xdr_authdes_verf NEW: Secure RPC
1485 xdr_cryptkeyarg NEW: Secure RPC
1486 xdr_cryptkeyarg2 NEW: Secure RPC
1487 xdr_cryptkeyres NEW: Secure RPC
1488 xdr_getcredres NEW: Secure RPC
1489 xdr_key_netstarg NEW: Secure RPC
1490 xdr_key_netstres NEW: Secure RPC
1491 xdr_keybuf NEW: Secure RPC
1492 xdr_keystatus NEW: Secure RPC
1493 xdr_netnamestr NEW: Secure RPC
1494 xdr_sizeof NEW: Secure RPC
1495 xdr_unixcred NEW: sunrpc ext
1496 xencrypt NEW: Secure RPC
1497 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1498 \f
1499 Version 2.0.6
1501 * more bug fixes
1503 \f
1504 Version 2.0.5
1506 * more bug fixes
1508 * inet_ntoa is thread-safe
1510 * updwtmp is moved from libutil to libc
1512 * rewrite of cbrt function
1514 * update of timezone data
1515 \f
1516 Version 2.0.4
1518 * more bug fixes
1519 \f
1520 Version 2.0.3
1522 * more bug fixes
1523 \f
1524 Version 2.0.2
1526 * more bug fixes
1528 * add atoll function
1530 * fix complex problems in Berkeley DB code
1532 * fix math functions
1533 \f
1534 Version 2.0.1
1536 * fixed lots of header problems (especially Linux/GNU specific)
1538 * dynamic loader preserves all registers
1540 * Roland McGrath provided support for handling of auxiliary objects in
1541 the ELF dynamic loader.
1543 * support for parallel builds is improved
1544 \f
1545 Version 2.0
1547 * GNU extensions are no longer declared by default. To enable them you
1548 must define the macro `_GNU_SOURCE' in your program or compile with
1549 `-D_GNU_SOURCE'.
1551 * The library has changed from using GNU ld symbol aliases to using weak
1552 symbols where available. The ELF object file format supports weak
1553 symbols; GNU ld also supports weak symbols in the a.out format. (There
1554 is also now support for other GNU ld extensions in ELF. Use the
1555 `--with-elf' option to configure to indicate you have ELF, and
1556 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1557 of many files which contained only symbol aliases, reducing the size of
1558 the source and the compiled library; many other files were renamed to
1559 less cryptic names previously occupied by the symbol alias files.
1560 There is a new header file <elf.h> for programs which operate on
1561 files in the ELF format.
1563 * Converted to Autoconf version 2, so `configure' has more options.
1564 Run `configure --help' to see the details.
1566 * The library can now be configured to build profiling, highly-optimized
1567 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1568 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1569 `configure' enable building these extra libraries. The shared library is
1570 built by default when using both ELF and GNU ld. When shared libraries
1571 are enabled, the new library `-ldl' is available for arbitrary run-time
1572 loading of shared objects; its interface is defined in <dlfcn.h>. The
1573 new header file <link.h> gives access to the internals of the run-time
1574 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1575 application of same name on other systems and it provides information
1576 about dynamically linked binaries.
1578 * The C library now provides the run-time support code for profiling
1579 executables compiled with `-pg'. Programs can control the profiling code
1580 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1581 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1582 the support for this file format was contributed by David Mosberger-Tang.
1584 * The math code has been replaced with a math library based on fdlibm from
1585 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1586 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1587 functions. The math functions now reside in a separate library, so
1588 programs using them will need to use `-lm' their linking commands.
1590 * John C. Bowman contributed optimized ix87 assembler inline functions.
1592 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1593 mechanism similar to that found in Solaris 2. This is now used for the
1594 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1595 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1596 file controls what services are used for each individual database. This
1597 works by loading shared libraries with names specified in `nsswitch.conf',
1598 so service modules can be changed or added at any time without even
1599 relinking any program. Currently there are the file, db, and NIS based
1600 NSS services available.
1602 * The new functions `strtoq' and `strtouq' parse integer values from
1603 strings, like `strtol' and `strtoul', but they return `long long int' and
1604 `unsigned long long int' values, respectively (64-bit quantities).
1606 * The new functions `strtof' and `strtold' parse floating-point values from
1607 strings, like `strtod', but they return `float' and `long double' values,
1608 respectively (on some machines `double' and `long double' are the same).
1610 * Ulrich Drepper has contributed new implementations of the floating-point
1611 printing and reading code used in the `printf' family of functions and
1612 `strtod', `strtof', and `strtold'. These new functions are perfectly
1613 accurate, and much faster than the old ones.
1615 * The implementation of the POSIX locale model was completely rewritten by
1616 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1617 to compile the POSIX locale definition.
1619 * The former dummy implementations of the strcoll and strxfrm function are
1620 now replaced by fully functional code contributed by Ulrich Drepper. The
1621 collation information comes from the POSIX locale definitions.
1623 * The new header <langinfo.h> defines an interface for accessing
1624 various locale-dependent data (using the locale chosen with `setlocale').
1626 * Ulrich Drepper has contributed a new suite of functions for operation on
1627 wide-character and multibyte-character strings, in <wchar.h>;
1628 and classification and case conversion of wide characters, in <wctype.h>.
1629 These new functions are conforming to the ISO C, Amendement 1 specification.
1631 * There is now a second implementation of the standard I/O library available.
1632 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1633 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1635 * You can now use positional parameter specifications in format strings
1636 for the `printf' and `scanf' families of functions. For example,
1637 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1638 ``Number 6, Mr Jones''. This is mainly useful when providing different
1639 format strings for different languages, whose grammars may dictate
1640 different orderings of the values being printed. To support this
1641 feature, the interface for `register_printf_handler' has changed; see
1642 the header file <printf.h> for details.
1644 * The `printf' and `scanf' families of functions now understand a new
1645 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1646 to group numbers as indicated by the locale; for `scanf' and friends, this
1647 says to accept as valid only a number with all the proper grouping
1648 separators in the right places. In the default "C" locale, numbers are
1649 not grouped; but locales for specific countries will define the usual
1650 conventions (i.e. separate thousands with `,' in the US locale).
1652 * The pgrp functions have been regularized, slightly incompatibly but much
1653 less confusingly. The core functions are now `getpgid' and `setpgid',
1654 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1655 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1656 provided for compatibility. There is no longer an incompatible `getpgrp'
1657 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1659 * The new header file <fts.h> and suite of functions simplify programs that
1660 operate on directory trees. This code comes from 4.4 BSD.
1662 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1663 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1664 NSS scheme used in glibc.
1666 * There is a new malloc debugging hook `__memalign_hook'.
1668 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1669 `unsigned int' in <sys/types.h>. These are for compatibility only and
1670 their use is discouraged.
1672 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1673 done differently, so that it works even without GNU ld.
1675 * New function `euidaccess' checks allowed access to a file like `access',
1676 but using the effective IDs instead of the real IDs.
1678 * The time zone data files have been updated for the latest and greatest
1679 local time conventions of the countries of the world.
1681 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1682 see <dirent.h>.
1684 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1685 for formatting floating-point numbers. They are provided only for
1686 compatibility; new programs should use `sprintf' instead. There are
1687 also equivalent function for the `long double' floating-point type and
1688 all functions also exist in a reentrant form.
1690 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1691 functions for maintaining the login-record files (primarily of use to
1692 system programs such as `login'), and convenient functions for
1693 allocating and initializing a pseudo-terminal (pty) device.
1695 * Ulrich Drepper has contributed new support for System V style
1696 shared memory and IPC on systems that support it.
1698 * Ulrich Drepper has contributed several miscellaneous new functions found
1699 in System V: The `hsearch' family of functions provide an effective
1700 implementation of hash tables; `a64l' and `l64a' provide a very simple
1701 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1702 number generator.
1704 * Ulrich Drepper has contributed new reentrant counterparts for the
1705 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1707 * Ulrich Drepper has contributed new, highly-optimized versions of several
1708 string functions for the i486/Pentium family of processors.
1710 * Ulrich Drepper has updated the Linux-specific code, based largely
1711 on work done in Hongjiu Lu's version of GNU libc for Linux.
1712 The GNU library now supports Linux versions 2.0.10 and later,
1713 using the ELF object file format (i[3456]86-*-linux).
1715 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1717 * David Mosberger-Tang and Richard Henderson have ported the C library
1718 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1719 dynamic linking support for ELF/Alpha.
1721 * Richard Henderson contributed several Alpha optimized assembler function
1722 for arithmetic and string handling.
1724 * Ulrich Drepper has contributed a new set of message catalog functions to
1725 support multiple languages using the <libintl.h> interface, for use with
1726 his new package GNU gettext. Translation volunteers have contributed
1727 catalogs of the library's messages in Spanish, German, and Korean.
1729 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1730 program and the `catgets' function for reading the catalog files it
1731 creates. (The <libintl.h> interface is preferred; we include the
1732 <nl_types.h> interface using `catgets' only for source compatibility with
1733 programs already written to use it.)
1735 * New header file <values.h> gives SVID-compatible names for <limits.h>
1736 constants.
1738 * Various new macros, declarations, and small header files for compatibility
1739 with 4.4 BSD.
1741 * New function `group_member' is a convenient way to check if a process has
1742 a given effective group ID.
1744 * When using GCC 2.7 and later, the socket functions are now declared in a
1745 special way so that passing an argument of type `struct sockaddr_in *',
1746 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1747 `struct sockaddr *' type, does not generate a type-clash warning.
1749 * New function `error' declared in header file <error.h> is a convenient
1750 function for printing error messages and optionally exiting; this is the
1751 canonical function used in GNU programs. The new functions `err', `warn',
1752 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1753 doing the same thing.
1755 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1756 POSIX.2 `glob' function to do ~ and {...} expansion.
1758 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1759 `clearenv' which is used in POSIX.9 is also available.
1761 * New function `getsid' returns session ID number on systems that support it.
1763 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1764 files <db.h> and <mpool.h> provide a rich set of functions for several
1765 types of simple databases stored in memory and in files, and <ndbm.h> is
1766 an old `ndbm'-compatible interface using the `db' functions. Link with
1767 `-ldb' to get these functions.
1769 * New macro `strdupa' copies a string like `strdup', but uses local stack
1770 space from `alloca' instead of dynamic heap space from `malloc'.
1772 * New function `strnlen' is like `strlen' but searches only a given maximum
1773 number of characters for the null terminator. `stpncpy', `strndup' and
1774 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1775 function.
1777 * New function `statfs' in header <sys/statfs.h>.
1779 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1780 provide convenient functions for operating on blocks of null-terminated
1781 strings.
1783 * A new suite of functions in <utmp.h> handle all the details of reading
1784 and writing the utmp file.
1786 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1787 Thorsten Kukuk.
1789 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1790 completely POSIX compliant and also implemented the extended functionality
1791 to handle alternate digit representation and alternate era date formats.
1793 * Ulrich Drepper provided an implementation of the `strptime' function
1794 defined in XPG4.2 which transforms a string into a `struct tm' value.
1796 * Paul Eggert provided the tzselect shell script as part of the timezone
1797 code. The shell script makes it easy to select the correct timezone
1798 specification.
1800 * The implementation of the malloc family of functions is completely replaced
1801 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1802 The implementation uses the mmap function (if available) and it is
1803 optimized for the use in multi threaded programs.
1805 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1806 functions. This new functionality is usable by specifying a special
1807 salt string and it is compatible with implementation on *BSD systems.
1809 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1810 `getsubopt' to handle second level command line options, `bsd_signal'
1811 to access BSD style `signal' functionality, the obsolete `regexp' style
1812 expression matcher.
1814 * the `lchown' function is available on system which support this
1815 functionality.
1817 * The implementation of the shadow password handling function was contributed
1818 by Ulrich Drepper.
1820 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1822 * POSIX.1g support was added. The <sys/select.h> header is available,
1823 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1824 implementation of `getaddrinfo'.
1825 \f
1826 Version 1.09
1828 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1830 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1831 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1833 * The new function `daemon' from 4.4 BSD is useful for server programs that
1834 want to put themselves in the background.
1836 * Joel Sherrill has contributed support for several standalone boards that
1837 run without an operating system.
1839 * `printf', `scanf' and friends now accept a `q' type modifier for long
1840 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1842 * All of the code taken from BSD (notably most of the math and networking
1843 routines) has been updated from the BSD 4.4-Lite release.
1845 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1847 * The new functions `getdomainname' and `setdomainname' fetch or change the
1848 YP/NIS domain name. These are system calls which exist on systems which
1849 have YP (aka NIS).
1851 * The time zone data files have been updated for the latest international
1852 conventions.
1854 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1855 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1856 \f
1857 Version 1.08
1859 * The C library now includes support for Sun RPC, from Sun's free
1860 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1861 are included. (There is still no support for YP.)
1863 * Tom Quinn has contributed a port of the C library to SGI machines running
1864 Irix 4 (mips-sgi-irix4).
1866 * The new `lockf' function is a simplified interface to the locking
1867 facilities of `fcntl', included for compatibility.
1869 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1871 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1873 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1874 compatibility.
1876 * The error message printed by `assert' for a failed assertion now includes
1877 the name of the program (if using GNU ld) and the name of the calling
1878 function (with versions of GCC that support this).
1880 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1882 * The library now includes the <sys/mman.h> header file and memory
1883 management functions `mmap', `munmap', `mprotect', `msync', and
1884 `madvise', on systems that support those facilities.
1886 * The interface for `mcheck' has changed slightly: the function called to
1887 abort the program when an allocation inconsistency is detected now takes
1888 an argument that indicates the type of failure. The new function
1889 `mprobe' lets you request a consistency check for a particular block at
1890 any time (checks are normally done only when you call `free' or `realloc'
1891 on a block).
1893 * It is now possible to easily cross-compile the C library, building on one
1894 system a library to run on another machine and/or operating system. All
1895 you need to do is set the variable `HOST_CC' in `configparms' to the
1896 native compiler for programs to run on the machine you are building on (a
1897 few generator programs are used on Unix systems); set `CC' to the
1898 cross-compiler.
1900 * The new function `fexecve' (only implemented on the GNU system) executes
1901 a program file given a file descriptor already open on the file.
1902 \f
1903 Version 1.07
1905 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1906 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1908 * You can set the variable `libprefix' in `configparms' to specify a prefix
1909 to be prepended to installed library files; this makes it easy to install
1910 the GNU C library to be linked as `-lgnuc' or whatever.
1912 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1913 copies a limited number of characters from a string, and returns the
1914 address of the last character written.
1916 * You no longer need to check for whether the installed `stddef.h' is
1917 compatible with the GNU C library. configure now checks for you.
1919 * You can now define a per-stream `fileno' function to convert the
1920 stream's cookie into an integral file descriptor.
1922 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1923 allocates zero bytes of storage, and returns a unique pointer which
1924 you can pass to `realloc' or `free'. The behavior is undefined if
1925 you dereference this pointer.
1927 * The C library now runs on Sony NEWS m68k machines running either
1928 NewsOS 3 or NewsOS 4.
1930 * The new `syscall' function is a system-dependent primitive function
1931 for invoking system calls. It has the canonical behavior on Unix
1932 systems, including unreliable return values for some calls (such as
1933 `pipe', `fork' and `getppid').
1935 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1936 to `EAGAIN', which is the preferred name. On systems whose kernels
1937 use two distinct codes, the C library now translates EWOULDBLOCK to
1938 EAGAIN in every system call function.
1939 \f
1940 Version 1.06
1942 * The GNU C Library Reference Manual is now distributed with the library.
1943 `make dvi' will produce a DVI file of the printed manual.
1944 `make info' will produce Info files that you can read on line using C-h i
1945 in Emacs or the `info' program.
1946 Please send comments on the manual to bug-glibc-manual@gnu.org.
1948 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1950 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1952 * Jason Merrill has contributed a port to the Sequent Symmetry running
1953 Dynix version 3 (i386-sequent-dynix).
1955 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1956 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1958 * New function `memory_warnings' lets you arrange to get warnings when
1959 malloc is running out of memory to allocate, like Emacs gives you.
1961 * The C library now contains the relocating allocator used in Emacs 19 for
1962 its editing buffers. This allocator (ralloc) minimizes allocation
1963 overhead and fragmentation by moving allocated regions around whenever it
1964 needs to. You always refer to a ralloc'd region with a "handle" (a
1965 pointer to a pointer--an object of type `void **').
1967 * There is a new `printf' format: `%m' gives you the string corresponding
1968 to the error code in `errno'.
1970 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1971 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1972 pass, the `a' modifier says to fill in a `char **' you pass with a
1973 malloc'd string.
1975 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1976 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1977 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1979 * `mkstemp' is a traditional Unix function to atomically create and open a
1980 uniquely-named temporary file.
1981 \f
1982 Version 1.05
1984 * The standard location for the file that says what the local timezone is
1985 has changed again. It is now `/usr/local/etc/localtime' (or more
1986 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1988 * The distribution no longer contains any files with names longer than 14
1989 characters.
1991 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1992 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1994 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1995 \f
1996 Version 1.04
1998 * The configuration process has changed quite a bit. The `configure'
1999 script is now used just like the configuration scripts for other GNU
2000 packages. The `sysdeps' directory hierarchy is much rearranged.
2001 The file `INSTALL' explains the new scheme in detail.
2003 * The header files no longer need to be processed into ANSI C and
2004 traditional C versions. There is just one set of files to install, and
2005 it will work with ANSI or old C compilers (including `gcc -traditional').
2007 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2008 MIPS DECStation running Ultrix 4.
2010 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2011 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2012 made itself into a shared library.
2014 * Yet further improved support for the i386, running 4.3 BSD-like systems
2015 (such as Mach 3 with the Unix single-server), or System V.
2017 * New function `strncasecmp' to do case-insensitive string comparison
2018 with limited length.
2020 * New function `strsep' is a reentrant alternative to `strtok'.
2022 * New functions `scandir' and `alphasort' for searching directories.
2024 * New function `setenv' is a better interface to `putenv'.
2026 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2027 function for traversing a directory tree.
2029 * The GNU obstack package is now also part of the C library.
2030 The new function `open_obstack_stream' creates a stdio stream that
2031 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2032 formatted output directly to an obstack.
2034 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2035 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2037 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2039 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2040 things to your strings.
2042 * There are some new test programs: test-fseek, testmb, and testrand.
2044 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2045 These ports are not finished, but are a good starting place for really
2046 supporting those systems.
2048 * `/etc/localtime' is now the standard location for the file that says what
2049 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2050 This follows the general principle that `/etc' is the place for all local
2051 configuration files.
2053 * The C library header files now use `extern "C"' when used by the C++
2054 compiler, so the C library should now work with C++ code.
2056 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2057 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2058 in <strings.h>.)
2060 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2061 function which uses the `merge sort' algorithm, and is said to be
2062 significantly faster than the old GNU `qsort' function. Merge sort is
2063 now the standard `qsort' function. The new algorithm can require a lot
2064 of temporary storage; so, the old sorting function is called when the
2065 required storage is not available.
2067 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2068 provides the Unix `crypt' function, plus some other entry points.
2070 * The code and header files taken from 4.4 BSD have been updated with the
2071 latest files released from Berkeley.
2072 \f
2073 ----------------------------------------------------------------------
2074 Copyright information:
2076 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
2078 Permission is granted to anyone to make or distribute verbatim copies
2079 of this document as received, in any medium, provided that the
2080 copyright notice and this permission notice are preserved,
2081 thus giving the recipient permission to redistribute in turn.
2083 Permission is granted to distribute modified versions
2084 of this document, or of portions of it,
2085 under the above conditions, provided also that they
2086 carry prominent notices stating who last changed them.
2087 \f
2088 Local variables:
2089 version-control: never
2090 fill-column: 76
2091 End: