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1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2012 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
6 using `glibc' in the "product" field.
7 \f
8 Version 2.17
10 * The following bugs are resolved with this release:
12 6778, 6808, 13717, 13939, 14042, 14090, 14166, 14150, 14151, 14154, 14157,
13 14166, 14173, 14195, 14283, 14298, 14303, 14307, 14328, 14331, 14336,
14 14337, 14347, 14349
16 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
17 Optimized versions of memcpy, memset, and memcmp added for System z10 and
18 zEnterprise z196.
19 Implemented by Andreas Krebbel.
21 * The new function secure_getenv allows secure access to the environment,
22 returning NULL if running in a SUID/SGID process. This function replaces
23 the internal function __secure_getenv.
25 * SystemTap static probes have been added into the dynamic linker.
26 Implemented by Gary Benson.
28 * The minimum Linux kernel version that this version of the GNU C Library
29 can be used with is 2.6.16.
31 \f
32 Version 2.16
34 * The following bugs are resolved with this release:
36 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
37 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
38 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
39 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
40 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
41 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
42 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
43 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
44 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
45 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
46 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
47 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
48 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
49 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
50 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
51 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
52 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
53 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
54 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
55 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
56 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
57 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
58 14278
60 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
61 configuring glibc with:
62 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
63 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
64 Implemented by H.J. Lu.
66 * ISO C11 support:
68 + define static_assert
70 + do not declare gets
72 + declare at_quick_exit and quick_exit also for ISO C11
74 + aligned_alloc. NB: The code is deliberately allows the size parameter
75 to not be a multiple of the alignment. This is a moronic requirement
76 in the standard but it is only a requirement on the caller, not the
77 implementation.
79 + timespec_get added
81 + uchar.h support added
83 + CMPLX, CMPLXF, CMPLXL added
85 Implemented by Ulrich Drepper.
87 * Support for the IA-64 has been moved to ports.
89 * Remove support for anything but ELF binary format
91 * Checking versions of poll, ppoll added.
92 Implemented by Ulrich Drepper.
94 * More generic and 64-bit performance optimizations to math functions.
95 Implemented by Ulrich Drepper.
97 * New configure option --enable-obsolete-rpc makes the deprecated RPC
98 headers and functions available at compile time as they were before
99 version 2.14. This option will be removed at some time in the future
100 after the TI-RPC library becomes fully sufficient for the needs of
101 existing applications.
103 * Compatibility code for Linux kernel versions before 2.4 has been removed.
104 Note that glibc is not expected to work with any Linux kernel version
105 before 2.6.
107 * New header <sys/auxv.h> and function getauxval allowing easy access to
108 the AT_* key-value pairs passed from the Linux kernel. The header also
109 defines the HWCAP_* bits associated with the AT_HWCAP key.
111 * New locales: mag_IN
113 * New configure option --enable-systemtap builds SystemTap static probes
114 into libc for setjmp and longjmp and into libpthread for various operations.
115 So far the setjmp/longjmp probes and some of the libpthread probes are
116 provided only for i*86 and x86_64.
117 Implemented by Roland McGrath and Rayson Ho.
119 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
121 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
122 and Will Schmidt.
124 * More optimized functions for SPARC. Implemented by David S. Miller.
126 * Improved support for cross-compilation, especially bootstrap builds
127 without a previously built glibc.
129 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
130 Chris Metcalf from Tilera.
132 * Support for the old ARM ABI has been removed from ports. Only the EABI is
133 now supported for ARM processors.
135 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
136 as the name of the dynamic linker, to distinguish it from the
137 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
139 * Support for CRIS has been removed from ports.
141 * A new class of installed header has been documented for low-level
142 platform-specific functionality. PowerPC added the first instance with a
143 function to provide time base register access. Contributed by Tulio
144 Magno Quites Machado Filho.
146 * ix86 configurations now install header files that are consistent with
147 what x86-64 configurations install. These same header files can be used
148 for -m32, -m64, or -mx32 builds.
149 Contributed by H.J. Lu.
151 * Math library bug fixes. A thorough audit of all open math library bugs was
152 conducted by Joseph Myers. Significant progress was made on many math
153 library bugs resulting in more accurate exceptions and function results.
154 Many thanks to all those that contributed including Andreas Jaeger for his
155 patch review and work on the x87 trigonometric instruction issues.
157 * Timezone data is no longer installed. Timezone-related binaries and scripts
158 will continue to be installed. Users should obtain their timezone data from
159 their distribution provider or from the tzdata package at
160 <ftp://munnari.oz.au/pub/>.
161 \f
162 Version 2.15
164 * The following bugs are resolved with this release:
166 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
167 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
168 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
169 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
170 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
171 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
172 13484, 13506, 13515, 13523, 13524, 13538, 13540
174 * New program pldd to list loaded object of a process
175 Implemented by Ulrich Drepper.
177 * Add nss_db support back to glibc. No more dependency on Berkeley db
178 and support for initgroups lookups.
179 Implemented by Ulrich Drepper.
181 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
182 Contributed by HJ Lu.
184 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
185 Contributed by HJ Lu.
187 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
188 on x86-32 and x86-64.
189 Contributed by Liubov Dmitrieva.
191 * Optimized strchr and strrchr for SSE on x86-32.
192 Contributed by Liubov Dmitrieva.
194 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
195 for x86-64 and x86-32.
196 Contributed by Liubov Dmitrieva.
198 * New interfaces: scandirat, scandirat64
199 Implemented by Ulrich Drepper.
201 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
202 Implemented by Ulrich Drepper.
204 * nscd now also caches the netgroup database.
205 Implemented by Ulrich Drepper.
207 * Integrate libm with gcc's -ffinite-math-only option.
208 Implemented by Ulrich Drepper.
210 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
211 to math functions. Implemented by Ulrich Drepper.
213 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
214 Implemented by Ulrich Drepper.
216 * New Linux interfaces: process_vm_readv, process_vm_writev
218 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
219 Implemented by Ulrich Drepper.
221 * Optimized nearbyint and strcasecmp for PPC.
222 Implemented by Adhemerval Zanella.
224 * New locales: bho_IN, unm_US, es_CU, ta_LK
225 \f
226 Version 2.14
228 * The following bugs are resolved with this release:
230 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
231 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
232 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
233 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
234 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
235 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
236 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
237 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
238 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
239 12795, 12811, 12813, 12814, 12841
241 * The RPC implementation in libc is obsoleted. Old programs keep working
242 but new programs cannot be linked with the routines in libc anymore.
243 Programs in need of RPC functionality must be linked against TI-RPC.
244 The TI-RPC implementation is IPv6 enabled and there are other benefits.
246 Visible changes of this change include (obviously) the inability to link
247 programs using RPC functions without referencing the TI-RPC library and the
248 removal of the RPC headers from the glibc headers.
249 Implemented by Ulrich Drepper.
251 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
252 syncfs, setns, sendmmsg
254 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
255 yue_HK, lij_IT, mhr_RU
257 * New encodings: CP770, CP771, CP772, CP773, CP774
259 * New program sotruss to trace calls through PLTs
260 Implemented by Ulrich Drepper.
262 * The malloc hook implementation is marked deprecated and will be removed
263 from the default implementation in the next version. The design never
264 worked ever since the introduction of threads. Even programs which do
265 not create threads themselves can use multiple threads created internally.
266 \f
267 Version 2.13
269 * The following bugs are resolved with this release:
271 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
272 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
273 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
274 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
275 12378, 12394, 12397
277 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
279 * POWER7 optimizations: memset, memcmp, strncmp
281 * New optimized string functions for x86-64: strnlen (SSE2),
282 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
283 Implemented by Ulrich Drepper.
284 \f
285 Version 2.12
287 * The following bugs are resolved with this release:
289 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
290 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
291 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
292 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
293 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
294 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
295 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
296 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
298 * New interfaces: pthread_getname_np, pthread_setname_np
300 * New Linux interface: recvmmsg
302 * STT_GNU_IFUNC implemented for Sparc by David Miller.
304 * The dynamic linker now recognizes supported ABI versions from the
305 EI_ABIVERSION field in the ELF header.
306 Implemented by Ulrich Drepper.
308 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
309 will not be used to fill in password fields in the passwd.byname replies.
310 Instead it is used to synthesize the shadow.byname table, should it be
311 missing. This is a useful mode in some installations involving Solaris.
312 Implemented by Ulrich Drepper.
314 * New locales: kok_IN, sq_MK, cv_RU
315 \f
316 Version 2.11
318 * The following bugs are resolved with this release:
320 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
321 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
322 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
323 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
324 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
325 10789, 10817, 10823, 10840, 10847
327 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
328 mkostemps64
329 Implemented by Ulrich Drepper.
331 * Checking version of longjmp added that fails if an uninitialized stack
332 frame would be created. Implemented by Ulrich Drepper.
334 * STT_GNU_IFUNC is now supported in static executables.
335 Implemented by H.J. Lu.
337 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
339 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
340 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
341 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
342 Contributed by H.J. Lu.
344 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
345 Implemented by Ulrich Drepper.
347 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
348 strstr, strcasestr.
349 Contributed by H.J. Lu.
351 * Support for fma instruction in AVX on x86-64.
352 Implemented by H.J. Lu and Ulrich Drepper.
354 * AVX support in x86-64 auditing support in ld.so.
355 Implemented by H.J. Lu.
357 * STB_GNU_UNIQUE support added.
358 Implemented by Ulrich Drepper.
360 * Implement second fallback mode for optimized DNS lookup for even more
361 broken environments. If two requests from the same port are not
362 handled correctly close the socket and open a new one before sending
363 the second request. The 'single-request-reopen' option in /etc/resolv.conf
364 can be used to select this mode right away, instead of rediscovering the
365 necessity is every process again.
366 Implemented by Ulrich Drepper.
368 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
369 Implemented by Adam Tkac.
371 * Optimized iconv conversions for S390x.
372 Implemented by Andreas Krebbel.
374 * Using condvars with PI mutexes is now more efficient due to kernel
375 support for requeueing to PI futexes. NPTL support added for x86-64.
376 Implemented by Ulrich Drepper.
378 * New locales: ps_AF, my_MM
379 \f
380 Version 2.10
382 * The following bugs are resolved with this release:
384 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
385 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
386 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
387 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
388 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
390 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
391 Implemented by Ulrich Drepper.
393 * New Linux interfaces: accept4, fallocate, fallocate64.
394 Implemented by Ulrich Drepper.
396 * Correct declarations of string function when used in C++ code. This
397 could lead to compile errors for invalid C++ code.
399 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
400 now in POSIX.
402 * New POSIX 2008 interface: psiginfo
403 Implemented by Ulrich Drepper.
405 * New ISO C++1x interfaces: quick_exit, at_quick_exit
406 Implemented by Ulrich Drepper.
408 * Support for selecting between multiple function definitions at runtime
409 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
411 * The libcrypt library can now use the hash function implementations in
412 NSS. Implemented by Ulrich Drepper.
414 * The malloc implementation can be compiled to be less memory efficient
415 but higher performing in multi-threaded programs.
416 Implemented by Ulrich Drepper.
418 * New locales: nan_TW@latin, ks_IN
420 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
421 Implemented by Ulrich Drepper.
423 * Extended printf hook support. It is possible to use user-defined types
424 and extend existing format specifiers.
425 Implemented by Ulrich Drepper.
427 * Handling for group shadow files has been added.
428 Implemented by Ulrich Drepper.
430 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
431 servers (the case, e.g., for some people using the built-in DNS
432 server in ADSL modems/routers). There is a once-per-process timeout
433 in case of a broken server. To avoid it, users can run nscd or put
434 'options single-request' in /etc/resolv.conf.
435 Implemented by Ulrich Drepper.
436 \f
437 Version 2.9
439 * The following bugs are resolved with this release:
441 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
442 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
443 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
444 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
445 6968, 6974, 6980, 6995, 7008, 7009, 7029
447 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
448 up at the same time. Implemented by Ulrich Drepper.
450 * TLS descriptors for LD and GD on x86 and x86-64.
451 Implemented by Alexandre Oliva.
453 * getaddrinfo now handles DCCP and UDPlite.
454 Implemented by Ulrich Drepper.
456 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
457 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
458 Implemented by Ulrich Drepper.
460 * New implementation of memmem, strstr, and strcasestr which is O(n).
461 Implemented by Eric Blake.
463 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
465 * Implement "e" option for popen to open file descriptor with the
466 close-on-exec flag set. Implemented by Ulrich Drepper.
468 * Implement "b" mode for fmemopen. In this mode writes writes don't
469 implicitly add a NUL byte and seeks from the end of the buffer really
470 use the buffer end, not the string length as the basis.
471 Implemented by Ulrich Drepper.
473 * Many functions, exported and internal, now atomically set the close-on-exec
474 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
476 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
477 Sinhala)
478 Implemented by Pravin Satpute.
480 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
481 \f
482 Version 2.8
484 * The following bugs are resolved with this release:
486 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
487 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
488 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
489 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
490 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
491 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
492 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
494 * New locales: bo_CN, bo_IN, shs_CA.
496 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
498 * Sorting rules for some Indian languages (Devanagari and Gujarati).
499 Implemented by Pravin Satpute.
501 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
503 * nscd caches now all timeouts for DNS entries
504 Implemented by Ulrich Drepper.
506 * nscd is more efficient and wakes up less often.
507 Implemented by Ulrich Drepper.
509 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
510 vdprintf, and obstack_vprintf.
511 Implemented by Jakub Jelinek.
513 * Faster memset for x86-64.
514 Implemented by Harsha Jagasia and H.J. Lu.
516 * Faster memcpy on x86.
517 Implemented by Ulrich Drepper.
519 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
520 Implemented by Ulrich Drepper.
522 * Faster sqrt and sqrtf implemention for some PPC variants.
523 Implemented by Steven Munroe.
524 \f
525 Version 2.7
527 * The following bugs are resolved with this release:
529 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
530 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
531 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
532 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
533 5071, 5103, 5104, 5112, 5113, 5184, 5186
535 * More checking functions: fread, fread_unlocked, open*, mq_open.
536 Implemented by Jakub Jelinek and Ulrich Drepper.
538 * Extend fortification to C++. Implemented by Jakub Jelinek.
540 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
541 by not recognizing 'a' as a modifier when those specs are requested.
542 Implemented by Jakub Jelinek.
544 * PPC optimizations to math and string functions.
545 Implemented by Steven Munroe.
547 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
548 options to be passed. Implemented by Ulrich Drepper.
550 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
552 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
553 Implemented by Ulrich Drepper.
555 * Handle private futexes in the NPTL implementation.
556 Implemented by Jakub Jelinek and Ulrich Drepper.
558 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
559 Implemented by Roland McGrath and Ulrich Drepper.
561 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
563 * SHA-256 and SHA-512 based password encryption.
564 Implemented by Ulrich Drepper.
566 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
567 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
568 yo_NG.
570 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
571 Implemented by Ulrich Drepper.
572 \f
573 Version 2.6
575 * The following bugs are resolved with this release:
577 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
578 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
579 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
580 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
581 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
582 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
583 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
584 4702, 4858
586 * New Linux interfaces: epoll_pwait, sched_getcpu.
588 * New generic interfaces: strerror_l.
590 * nscd can now cache the services database. Implemented by Ulrich Drepper.
591 \f
592 Version 2.5
594 * The following bugs are resolved with this release:
596 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
597 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
598 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
599 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
600 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
601 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
602 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
603 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
604 3225, 3251, 3252, 3253, 3273
606 * For Linux, the sorting of addresses returned by getaddrinfo now also
607 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
608 Implemented by Ulrich Drepper.
610 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
611 Implemented by Ulrich Drepper.
613 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
615 * New iconv module for MIK. Contributed by Alexander Shopov.
617 * For sites with broken group and/or passwd database, the auto-propagate
618 option of nscd can prevent creating ID lookup entries from the results
619 of a name lookup and vice versa. This usually is no problem but some
620 site might have problems with the default behavior.
621 Implemented by Ulrich Drepper.
623 * Iterating over entire database in NIS can be slow. With the
624 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
625 to trade time for memory. The entire database will be read at once.
626 Implemented by Ulrich Drepper.
628 * The interfaces introduced in RFC 3542 have been implemented by
629 Ulrich Drepper.
631 * Support for the new ELF hash table format was added by Ulrich Drepper.
633 * Support for priority inheritance mutexes added by Jakub Jelinek and
634 Ulrich Drepper.
636 * Support for priority protected mutexes added by Jakub Jelinek.
638 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
639 or_IN, csb_PL, fy_NL, sr_ME.
640 \f
641 Version 2.4
643 * More overflow detection functions.
645 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
646 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
648 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
649 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
650 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
651 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
652 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
653 by Masahide Washizawa.
655 * It is now possible to install audit libraries for the dynamic linker using
656 LD_AUDIT. Implemented by Ulrich Drepper.
658 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
659 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
660 For a libc and libpthread that works well on Linux 2.4 kernels, we
661 recommend using the stable 2.3 branch.
663 * The new function open_wmemstream acts like open_memstream,
664 but uses a wchar_t wide character buffer.
666 * The new function ppoll is an improved version of poll, similar to pselect.
668 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
669 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
670 renameat, unlinkat, linkat, symlinkat, readlinkat.
672 * New Linux kernel system calls: unshare,
673 inotify_init, inotify_add_watch, inotify_rm_watch.
675 * The euidaccess function is now also known by the alias eaccess,
676 for compatibility with some other systems.
678 * Timezone data updated to 2006b version.
679 \f
680 Version 2.3.6
682 * The following bugs are resolved with this release:
684 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
685 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
686 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
687 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
688 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
689 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
691 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
693 * As of this release, GCC 4 can be used to compile the C Library.
695 * Timezone data updated to 2005m version.
696 \f
697 Version 2.3.5
699 * The following bugs are resolved with this release:
701 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
702 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
703 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
704 777, 787, 821, 822, 823, 825
706 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
707 \f
708 Version 2.3.4
710 * Support for RFC 3678. Real implementations exist only for Linux so far.
711 Implemented by Ulrich Drepper.
713 * nscd can now cache entries persistently. Expiring entries are reloaded.
714 For speedups the cache can be shared in memory with client processes.
715 Implemented by Ulrich Drepper.
717 * nscd can now perform SELinux checks.
718 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
720 * getaddrinfo queries are now cached. Canonical name lookup is performed
721 efficiently.
722 Implemented by Ulrich Drepper.
724 * The nothrow function attribute is used when headers are used by gcc when
725 compiling C code. This can avoid significant amounts of exception
726 handling data.
728 * The malloc functions perform more error checking and are stricter when
729 it comes to reacting on errors. The default action is to terminate
730 the process after showing an error message. Implemented by Ulrich Drepper.
732 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
733 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
735 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
736 namespaces using the new function dlmopen(). This feature is of course,
737 like most other dynamic loading functionality, not available in statically
738 linked applications. Implemented by Ulrich Drepper.
740 * Low-overhead boundary checking variants of string and some stdio functions
741 were added. These are to be used in conjunction with a gcc patch by
742 Jakub Jelinek which adds calls to these functions if possible.
743 Implemented by Jakub Jelinek and Ulrich Drepper.
745 * Old code for several operating systems and machine architectures that
746 have not been in working condition in a long time have been removed from
747 the main source tree maintained by the GNU C Library's maintainers.
748 These files are now reside in the separate `ports' source module
749 that is usable as an add-on when building the library.
750 \f
751 Version 2.3.3
753 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
754 interrogate the dynamic linker, compatible with the Solaris interface.
756 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
757 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
759 * getifaddrs now uses the netlink interface on Linux to get its information.
760 Implemented by Thorsten Kukuk.
762 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
763 Implemented by Ulrich Drepper.
765 * support for non-executable stacks on x86 has been added. Changes mostly
766 by Roland McGrath.
768 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
769 and Ulrich Drepper.
771 * getaddrinfo now performs destination address selection according to
772 RFC 3484.
773 \f
774 Version 2.3.2
776 * Thread-safe interfaces for many functions that access locale data
777 were added in version 2.3, but these features were omitted from NEWS.
778 Many functions have variants with an `_l' suffix that take a `locale_t'
779 object as a parameter rather than consulting the current locale.
780 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
781 create and maintain `locale_t' objects. Additionally, the new function
782 `uselocale' sets "the current locale" (as used by functions not so
783 parameterized) set for an individual thread. These features were added
784 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
786 * The functions getresuid, getresgid, setresuid, and setresgid, which
787 have long been available on Linux, are now declared in <unistd.h>
788 and are now also available on the Hurd.
790 * ELF thread-local storage support (TLS) now works on x86-64.
792 * The new dynamic string token $LIB is expanded in shared library names.
793 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
795 * Aldy Hernandez contributed complete software floating point support for
796 PowerPC machines with no FPU.
798 * fexecve is implemented on Linux.
800 * The `btowc' function should work at least twice as fast due to
801 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
803 * With approriate thread add-ons cancelable functions are now implemented
804 in libc.so as well. No need to call the function in libpthread. This
805 change allowed to finally disable the incorrect and expensive handling
806 of weak definition in ld.so.
808 * Yet more PLT entries in libc.so have been removed. We finally arrived
809 at the bare minimum. Startup times improved appropriately.
811 * Support for the new Linux/x86 system call interface was added. The
812 AT_SYSINFO auxiliary vector entry is recognized and handled.
813 \f
814 Version 2.3
816 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
817 charsets.
819 * iconv (the program and the interface) now accepts empty names (excluding
820 options like //TRANSLIT) to mean "use charset of current locale".
822 * localedef can now transliterate characters in strings which are not in
823 the provided charmap. The information from the input locale is used.
825 * Prelinking support was added for ELF targets. This requires additional
826 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
828 * Read-only stdio streams now use mmap to speed up operation by eliminating
829 copying and buffer underflows. To use add 'm' to the mode string of
830 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
832 * The malloc functions were completely rewritten by Wolfram Gloger based
833 on Doug Lea's malloc-2.7.0.c.
835 * Isamu Hasegawa contributed a completely new and POSIX-conformant
836 implementation of regex.
838 * Bruno Haible upgraded the iconv and locale implementation to support
839 Unicode 3.2.
841 * Contents of the LC_* and LANG environment variables in the CEN style are
842 not recognized anymore. It never was used. Change by Ulrich Drepper.
844 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
845 thread-local storage (TLS) ABI on some platforms.
846 Changes by Ulrich Drepper. SH support by Kaz Kojima.
848 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
849 EUC-JISX0213, and TSCII.
851 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
852 BSD-compatible interface for getting all network interface addresses.
853 Implementation for IPv4 by Roland McGrath.
855 * Loading of locale data is faster due to the introduction of a locale
856 archive. Implemented by Roland McGrath and Ulrich Drepper.
858 * Startup times are significantly reduced by not using exported functions
859 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
860 and Ulrich Drepper.
862 * Steven Munroe contributed a port to PowerPC64/Linux.
863 \f
864 Version 2.2.6
866 * The Hurd now uses the GNU libio implementation of stdio rather than the
867 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
869 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
870 with the same behavior as the Linux system call of the same name.
871 \f
872 Version 2.2.5
874 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
875 128-bit long double format.
877 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
878 IBM1161, and IBM1162 charsets.
880 * Andreas Jaeger contributed a port to x86-64/Linux.
882 * Peter Bruin contributed a port to PowerPC/Hurd.
884 * libc functions using I/O streams now can handle wide-oriented streams
885 as well.
887 * optimizations in the dynamic linker. Binaries created by recent binutils
888 versions start up quicker due to reduced time spent on relocations.
890 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
891 \f
892 Version 2.2.4
894 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
895 asinh, atanh, j0 for the 128-bit long double format.
897 * Bruno Haible updated all the code handling Unicode in some form to
898 support Unicode 3.1.
900 * Speed of regex for single-byte locales is back to previous levels.
901 Patch by Isamu Hasegawa.
903 * Alpha, SPARC, and IA-64 now also using floating stacks.
905 * Startup time of internationalized applications greatly improved through
906 iconv cache. Use iconvconfig to generate the cache file.
907 Contributed by Ulrich Drepper.
909 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
910 severe performance problems. Patch by David Mosberger.
912 * The Hurd port got a lot more functionality like AIO, various stdio
913 extensions, etc. Mainly done by Roland McGrath.
915 * mtrace can now lookup symbols in shared libraries.
916 \f
917 Version 2.2.3
919 * Intel's IA-64 math library is largely integrated. It provides fast and
920 accurate implementatations for most basic and standard math functions
921 in float, double, and long double format.
923 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
924 and asin for the 96-bit long double format and asin, log, tan for the
925 128-bit long double format.
927 * The beginning of a last-bit accurate math library by IBM Haifa were added.
928 The basic double functions exist today. Contributed by Abraham Ziv
929 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
930 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
932 * An asynchronous name lookup library was added. The interface is designed
933 after POSIX AIO. The proposal was circulated beforehand to get comments.
934 No negative ones came in. Implemented by Ulrich Drepper.
936 * Port to S390/64bit contributed by Martin Schwidefsky
937 <schwidefsky@de.ibm.com>.
939 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
940 of functions for Linux/IA-64.
942 * The RPC code is now thread safe. Threads can now use the same service
943 of different services at the same time. Patch by Eric Norum
944 <eric.norum@usask.ca> with some help by Ulrich Drepper.
946 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
947 family of functions for Linux/S390.
949 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
950 of functions for Linux/x86.
952 * Port to Linux/CRIS contributed by Axis Communications.
953 \f
954 Version 2.2.2
956 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
957 we can now check for namespace violations and missing declarations. The
958 result is that almost all headers are now Unix-compliant (as defined in
959 the upcoming XPG6). The negative side is that some programs might need
960 corrections, too, if they depend on the incorrect form of the headers in
961 previous versions which defined too many symbols and included too many
962 other headers.
964 * regex now handles multibyte character sets correctly.
965 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
967 * iconv (the program) does now conform to the upcoming XPG6 and handles
968 charmaps. Instead of the charset names the path of charmaps can be
969 provided and the conversion happens based on this data.
970 Contributed by Ulrich Drepper.
972 * The locale program now provides detailed information about the installed
973 locales. While
975 locale -a
977 only lists the names of the supported locales
979 locale -a --verbose
981 provides details such as country, language, and codeset name.
982 Contributed by Ulrich Drepper.
983 \f
984 Version 2.2.1
986 * The gencat program now parses the input file according to the charset
987 selected by the LC_CTYPE category. This is important for stateful
988 character sets. To make generating catalogs easier there is a way
989 to overwrite the charset selected by the locale: before the first
990 message or $ quote line the catalog can contain a line like
992 $ codeset=ISO-8859-2
994 to select the charset (ISO-8859-2 in this case).
996 Implemented by Shinya Hanataka and Ulrich Drepper.
998 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
999 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1000 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1002 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1003 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1005 * The LANGUAGE environment variable is now ignored unless the locale is
1006 changed from the default "C" locale.
1008 * The usual bug fixes.
1009 \f
1010 Version 2.2
1012 * Greg McGary added runtime support for bounds checking using gcc's
1013 new -fbounded-pointers option. ix86 target is complete. PowerPC
1014 is in progress.
1016 * Thorsten Kukuk added secure mode support to nscd.
1018 * The Berkeley db libraries have been removed.
1020 Related, the nss_db module is now in a separate package since it
1021 obviously requires a database library being available.
1023 * Wide character I/O streams implemented by Ulrich Drepper.
1025 * Functions from the extended socket API added by Ulrich Drepper.
1027 * Functions feenableexcept and fedisableexcept to control the
1028 behaviour of individual exceptions have been added by Andreas Jaeger.
1030 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1032 * The resolver code has been updated from bind 8.2.3-T5B which supports
1033 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1034 and Mark Kettenis.
1036 This change could in some situations effect backward compatibility. Since
1037 now `_res' is a thread-local instead of a global variable, modifying it
1038 in one thread does not have any effect in other threads.
1040 The resolver library was also extended to allow IPv6 as the transport
1041 protocol for the requests. This work was done by Stig Venaas.
1043 * Compatibility code for K&R C compilers has been removed from the
1044 header files. A ISO C compiler is needed to use the library
1045 (conforming to either C89 or C99 standard).
1047 * Complete rewrite of the localedef program to support multibyte character
1048 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1049 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1050 Implemented by Ulrich Drepper.
1052 Bruno Haible significantly improved the generation and use of the data
1053 structures for the wide character tables.
1055 * Plural handling in gettext implemented by Ulrich Drepper.
1057 * The utmp daemon has been removed.
1059 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1061 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1062 and Yutaka Niibe.
1064 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1066 * POSIX barriers implemented by Kaz Kylheku.
1068 * POSIX spawn function family implemented by Ulrich Drepper.
1070 * POSIX spinlocks are now available.
1072 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1074 * the configure option --enable-kernel=X.Y.Z allows to strip out
1075 compatibility for kernel versions before X.Y.Z. This is currently only
1076 implemented for Linux.
1078 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1079 field sin6_scope_id. This means that all programs using IPv6 should be
1080 recompiled. Don't expect binary compatibility with previous glibc
1081 versions.
1083 * various conversion modules for IBM character sets contributed by
1084 Masahide Washizawa.
1086 * IA-64 port by Jes Sorensen and HJ Lu.
1087 \f
1088 Version 2.1.3
1090 * bug fixes
1092 \f
1093 Version 2.1.2
1095 * bug fixes
1097 \f
1098 Version 2.1.1
1100 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1102 * New xdr functions are added; some rpc functions are now 64bit clean.
1104 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1106 * Fixed known incompatibilities with glibc 2.0.
1108 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1110 * Optimized a number of functions (especially the ELF dynamic loader).
1112 * Update timezone data files.
1114 * lots of charmaps corrections
1116 * some new locale definitions and charmaps
1118 \f
1119 Version 2.1
1121 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1122 conform to POSIX member type requirements. Symbol versions have been
1123 adjusted as needed within the library, and for direct use by applications,
1124 but there is potential for problems if third-party libraries use
1125 struct timeval as part of their interface. This does not present
1126 a problem for X and other "essential" system libraries.
1128 * An additional locale model to support C++ Standard Library locale
1129 model and probably more was implemented by Ulrich Drepper.
1131 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1132 symbol level.
1134 * Miles Bader provided the `argp' function family to support hierachical
1135 command line argument parsing, layered on top of getopt.
1137 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1139 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1140 numbers.
1142 * scanf recognizes the %a and %A format for scanning floating point numbers.
1144 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1145 information and interfaces for the available integer types.
1147 * about 130 new math functions were added to implement the ISO C9x math
1148 library.
1150 * the new header <complex.h> contains definitions of the complex math
1151 functions from ISO C 9X.
1153 * the new header <tgmath.h> defines generic macros to use complex or
1154 real valued functions.
1156 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1158 * Andreas Jaeger provided a test suite for the math library.
1160 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1162 * Ulrich Drepper added character set conversion functions (iconv).
1164 * Optimized string functions have been added.
1166 * The localedata addon is now part of glibc.
1168 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1170 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1171 daemon for NSS (nscd).
1173 Missing a better place here are some numbers on improvements. Under
1174 Linux 2.1.125 un-tar-ing the kernel sources takes
1176 user system wall
1178 using local files 12.19s 6.88s 22.91s
1180 using NIS 13.92s 8.91s 26.34s
1182 using NIS & nscd 10.37s 7.34s 25.30s
1184 using NIS+ 27.57s 30.37s 640.46s
1186 using NIS+ & nscd 10.25s 7.83s 26.51s
1188 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1190 Keep in mind that non-namelookup related operations dominate above times.
1191 It was just a common complain that using NIS+ unpacking the kernel is
1192 horribly slow.
1194 [1] The old nscd implementation is not available anymore since it was
1195 distributed with glibc up to version 2.0.98 and thus is now replaced.
1197 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1199 * Mark Kettenis provided a Hesiod NSS module.
1201 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1202 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1204 * rcmd can now handle netgroups (Dick Streefland).
1206 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1207 Bambrough.
1209 * Support for the IPv6 protocol has been added to the socket API, as per the
1210 latest draft standards.
1212 * Support for Linux 2.2 has been added.
1214 * Interface changes relative to the latest 2.0.x release:
1215 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1216 addseverity NEW: Unix98
1217 alphasort64 NEW: LFS
1218 argp_err_exit_status NEW: argp, GNU ext
1219 argp_error NEW: argp, GNU ext
1220 argp_failure NEW: argp, GNU ext
1221 argp_help NEW: argp, GNU ext
1222 argp_parse NEW: argp, GNU ext
1223 argp_program_bug_address NEW: argp, GNU ext
1224 argp_program_version NEW: argp, GNU ext
1225 argp_program_version_hook NEW: argp, GNU ext
1226 argp_state_help NEW: argp, GNU ext
1227 argp_usage NEW: argp, GNU ext
1228 authdes_create NEW: Secure RPC
1229 authdes_getucred NEW: Secure RPC
1230 authdes_pk_create NEW: Secure RPC
1231 backtrace NEW: GNU ext.
1232 backtrace_symbols NEW: GNU ext.
1233 backtrace_symbols_fd NEW: GNU ext.
1234 cacos NEW: ISO C 9x
1235 cacosf NEW: ISO C 9x
1236 cacosh NEW: ISO C 9x
1237 cacoshf NEW: ISO C 9x
1238 cacoshl NEW: ISO C 9x
1239 cacosl NEW: ISO C 9x
1240 capget NEW: kernel
1241 capset NEW: kernel
1242 carg NEW: ISO C 9x
1243 cargf NEW: ISO C 9x
1244 cargl NEW: ISO C 9x
1245 casin NEW: ISO C 9x
1246 casinf NEW: ISO C 9x
1247 casinh NEW: ISO C 9x
1248 casinhf NEW: ISO C 9x
1249 casinhl NEW: ISO C 9x
1250 casinl NEW: ISO C 9x
1251 catan NEW: ISO C 9x
1252 catanf NEW: ISO C 9x
1253 catanh NEW: ISO C 9x
1254 catanhf NEW: ISO C 9x
1255 catanhl NEW: ISO C 9x
1256 catanl NEW: ISO C 9x
1257 cbc_crypt NEW: Secure RPC
1258 ccos NEW: ISO C 9x
1259 ccosf NEW: ISO C 9x
1260 ccosh NEW: ISO C 9x
1261 ccoshf NEW: ISO C 9x
1262 ccoshl NEW: ISO C 9x
1263 ccosl NEW: ISO C 9x
1264 cexp NEW: ISO C 9x
1265 cexpf NEW: ISO C 9x
1266 cexpl NEW: ISO C 9x
1267 cimag NEW: ISO C 9x
1268 cimagf NEW: ISO C 9x
1269 cimagl NEW: ISO C 9x
1270 clearerr_locked REMOVED
1271 clntunix_create NEW: sunrpc ext
1272 clog NEW: ISO C 9x
1273 clog10 NEW: ISO C 9x
1274 clog10f NEW: ISO C 9x
1275 clog10l NEW: ISO C 9x
1276 clogf NEW: ISO C 9x
1277 clogl NEW: ISO C 9x
1278 conj NEW: ISO C 9x
1279 conjf NEW: ISO C 9x
1280 conjl NEW: ISO C 9x
1281 cpow NEW: ISO C 9x
1282 cpowf NEW: ISO C 9x
1283 cpowl NEW: ISO C 9x
1284 cproj NEW: ISO C 9x
1285 cprojf NEW: ISO C 9x
1286 cprojl NEW: ISO C 9x
1287 creal NEW: ISO C 9x
1288 crealf NEW: ISO C 9x
1289 creall NEW: ISO C 9x
1290 creat64 NEW: LFS
1291 csin NEW: ISO C 9x
1292 csinf NEW: ISO C 9x
1293 csinh NEW: ISO C 9x
1294 csinhf NEW: ISO C 9x
1295 csinhl NEW: ISO C 9x
1296 csinl NEW: ISO C 9x
1297 csqrt NEW: ISO C 9x
1298 csqrtf NEW: ISO C 9x
1299 csqrtl NEW: ISO C 9x
1300 ctan NEW: ISO C 9x
1301 ctanf NEW: ISO C 9x
1302 ctanh NEW: ISO C 9x
1303 ctanhf NEW: ISO C 9x
1304 ctanhl NEW: ISO C 9x
1305 ctanl NEW: ISO C 9x
1306 des_setparity NEW: Secure RPC
1307 ecb_crypt NEW: Secure RPC
1308 endutxent NEW: Unix98
1309 exp10 NEW: ISO C 9x
1310 exp10f NEW: ISO C 9x
1311 exp10l NEW: ISO C 9x
1312 exp2 NEW: ISO C 9x
1313 exp2f NEW: ISO C 9x
1314 exp2l NEW: ISO C 9x
1315 fattach NEW: STREAMS
1316 fdetach NEW: STREAMS
1317 fdim NEW: ISO C 9x
1318 fdimf NEW: ISO C 9x
1319 fdiml NEW: ISO C 9x
1320 feclearexcept NEW: ISO C 9x
1321 fegetenv NEW: ISO C 9x
1322 fegetexceptflag NEW: ISO C 9x
1323 fegetround NEW: ISO C 9x
1324 feholdexcept NEW: ISO C 9x
1325 feof_locked REMOVED
1326 feraiseexcept NEW: ISO C 9x
1327 ferror_locked REMOVED
1328 fesetenv NEW: ISO C 9x
1329 fesetexceptflag NEW: ISO C 9x
1330 fesetround NEW: ISO C 9x
1331 fetestexcept NEW: ISO C 9x
1332 feupdateenv NEW: ISO C 9x
1333 fflush_locked REMOVED
1334 ffsl NEW: GNU ext.
1335 ffsll NEW: GNU ext.
1336 fgetpos64 NEW: LFS
1337 fgets_unlocked NEW: GNU ext.
1338 fileno_locked REMOVED
1339 fma NEW: ISO C 9x
1340 fmaf NEW: ISO C 9x
1341 fmal NEW: ISO C 9x
1342 fmax NEW: ISO C 9x
1343 fmaxf NEW: ISO C 9x
1344 fmaxl NEW: ISO C 9x
1345 fmin NEW: ISO C 9x
1346 fminf NEW: ISO C 9x
1347 fminl NEW: ISO C 9x
1348 fmtmsg NEW: Unix98
1349 fopen64 NEW: LFS
1350 fputc_locked REMOVED
1351 fputs_unlocked NEW: GNU ext.
1352 fread_unlocked NEW: GNU ext.
1353 freopen64 NEW: LFS
1354 fseeko NEW: Unix98
1355 fsetpos64 NEW: LFS
1356 fstatfs64 NEW: LFS
1357 fstatvfs NEW: Unix98
1358 fstatvfs64 NEW: LFS
1359 ftello NEW: Unix98
1360 ftello64 NEW: LFS
1361 ftruncate64 NEW: LFS
1362 ftw64 NEW: LFS
1363 fwrite_unlocked NEW: GNU ext.
1364 gai_strerror NEW: IPv6
1365 gamma_r REMOVED
1366 gammaf_r REMOVED
1367 gammal_r REMOVED
1368 getchar_locked REMOVED
1369 getdate NEW: Unix98
1370 getdate_err NEW: Unix98
1371 getdate_r NEW: GNU ext.
1372 getmsg NEW: STREAMS
1373 getnameinfo NEW: IPv6
1374 getnetname NEW: Secure RPC
1375 getpmsg NEW: STREAMS
1376 getpt NEW: Unix98 PTY
1377 getrlimit64 NEW: LFS
1378 getutxent NEW: Unix98
1379 getutxid NEW: Unix98
1380 getutxline NEW: Unix98
1381 glob64 NEW: GNU ext.
1382 globfree64 NEW: GNU ext.
1383 gnu_get_libc_release NEW: GNU ext.
1384 gnu_get_libc_version NEW: GNU ext.
1385 grantpt NEW: Unix98 PTY
1386 host2netname NEW: Secure RPC
1387 iconv NEW: iconv
1388 iconv_close NEW: iconv
1389 iconv_open NEW: iconv
1390 if_freenameindex NEW: IPv6
1391 if_indextoname NEW: IPv6
1392 if_nameindex NEW: IPv6
1393 if_nametoindex NEW: IPv6
1394 in6addr_any NEW: IPv6
1395 in6addr_loopback NEW: IPv6
1396 inet6_isipv4mapped NEW: IPv6
1397 isastream NEW: STREAMS
1398 iswblank NEW: GNU ext.
1399 key_decryptsession NEW: Secure RPC
1400 key_decryptsession_pk NEW: Secure RPC
1401 key_encryptsession NEW: Secure RPC
1402 key_encryptsession_pk NEW: Secure RPC
1403 key_gendes NEW: Secure RPC
1404 key_get_conv NEW: Secure RPC
1405 key_secretkey_is_set NEW: Secure RPC
1406 key_setnet NEW: Secure RPC
1407 key_setsecret NEW: Secure RPC
1408 llrint NEW: ISO C 9x
1409 llrintf NEW: ISO C 9x
1410 llrintl NEW: ISO C 9x
1411 llround NEW: ISO C 9x
1412 llroundf NEW: ISO C 9x
1413 llroundl NEW: ISO C 9x
1414 log2 NEW: ISO C 9x
1415 log2f NEW: ISO C 9x
1416 log2l NEW: ISO C 9x
1417 lrint NEW: ISO C 9x
1418 lrintf NEW: ISO C 9x
1419 lrintl NEW: ISO C 9x
1420 lround NEW: ISO C 9x
1421 lroundf NEW: ISO C 9x
1422 lroundl NEW: ISO C 9x
1423 lseek64 NEW: LFS
1424 makecontext NEW: Unix98
1425 mempcpy NEW: GNU ext.
1426 mmap64 NEW: LFS
1427 moncontrol REMOVED
1428 modify_ldt NEW: kernel
1429 nan NEW: ISO C 9x
1430 nanf NEW: ISO C 9x
1431 nanl NEW: ISO C 9x
1432 nearbyint NEW: ISO C 9x
1433 nearbyintf NEW: ISO C 9x
1434 nearbyintl NEW: ISO C 9x
1435 netname2host NEW: Secure RPC
1436 netname2user NEW: Secure RPC
1437 nexttoward NEW: ISO C 9x
1438 nexttowardf NEW: ISO C 9x
1439 nexttowardl NEW: ISO C 9x
1440 nftw NEW: Unix98
1441 nftw64 NEW: LFS
1442 open64 NEW: LFS
1443 passwd2des NEW: Secure RPC
1444 pow10 NEW: GNU ext.
1445 pow10f NEW: GNU ext.
1446 pow10l NEW: GNU ext.
1447 pread NEW: Unix98
1448 pread64 NEW: LFS
1449 printf_size NEW: GNU ext.
1450 printf_size_info NEW: GNU ext.
1451 profil_counter REMOVED
1452 pthread_mutexattr_getkind_np REPLACED
1453 pthread_mutexattr_setkind_np REPLACED
1454 ptsname NEW: Unix98 PTY
1455 ptsname_r NEW: Unix98 PTY
1456 putc_locked REMOVED
1457 putchar_locked REMOVED
1458 putgrent NEW: GNU ext.
1459 putmsg NEW: STREAMS
1460 putpmsg NEW: STREAMS
1461 pututxline NEW: Unix98
1462 pwrite NEW: Unix98
1463 pwrite64 NEW: LFS
1464 readdir64 NEW: LFS
1465 readdir64_r NEW: LFS
1466 remquo NEW: ISO C 9x
1467 remquof NEW: ISO C 9x
1468 remquol NEW: ISO C 9x
1469 round NEW: ISO C 9x
1470 roundf NEW: ISO C 9x
1471 roundl NEW: ISO C 9x
1472 rtime NEW: GNU ext.
1473 scalbln NEW: ISO C 9x
1474 scalblnf NEW: ISO C 9x
1475 scalblnl NEW: ISO C 9x
1476 scandir64 NEW: LFS
1477 sendfile NEW: kernel
1478 setcontext NEW: Unix98
1479 setrlimit64 NEW: LFS
1480 setutxent NEW: Unix98
1481 sighold NEW: Unix98
1482 sigignore NEW: Unix98
1483 sigqueue NEW: POSIX.1b
1484 sigrelse NEW: Unix98
1485 sigset NEW: POSIX.1b
1486 sigtimedwait NEW: POSIX.1b
1487 sigwaitinfo NEW: POSIX.1b
1488 sincos NEW: GNU ext.
1489 sincosf NEW: GNU ext.
1490 sincosl NEW: GNU ext.
1491 statfs64 NEW: LFS
1492 statvfs NEW: Unix98
1493 statvfs64 NEW: LFS
1494 strcasestr NEW: GNU ext.
1495 strtoimax NEW: ISO C 9x
1496 strtoumax NEW: ISO C 9x
1497 strverscmp NEW: GNU ext.
1498 svcauthdes_stats NEW: Secure RPC
1499 svcunix_create NEW: sunrpc etx
1500 svcunixfd_create NEW: sunrpc ext
1501 swapcontext NEW: Unix98
1502 tcgetsid NEW: Unix98 PTY
1503 tdestroy NEW: GNU ext.
1504 tgamma NEW: ISO C 9x
1505 tgammaf NEW: ISO C 9x
1506 tgammal NEW: ISO C 9x
1507 tmpfile64 NEW: LFS
1508 trunc NEW: ISO C 9x
1509 truncate64 NEW: LFS
1510 truncf NEW: ISO C 9x
1511 truncl NEW: ISO C 9x
1512 umount2 NEW: kernel
1513 unlockpt NEW: Unix98 PTY
1514 updwtmpx NEW: Unix98
1515 user2netname NEW: Secure RPC
1516 utmpxname NEW: Unix98
1517 versionsort NEW: GNU ext.
1518 versionsort64 NEW: GNU ext.
1519 waitid NEW: Unix98
1520 wcscasecmp NEW: GNU ext.
1521 wcsncasecmp NEW: GNU ext.
1522 wcsnlen NEW: GNU ext.
1523 wcstoimax NEW: ISO C 9x
1524 wcstoll NEW: ISO C 9x
1525 wcstoull NEW: ISO C 9x
1526 wcstoumax NEW: ISO C 9x
1527 wcswcs NEW: Unix98
1528 wordexp NEW: POSIX.2
1529 wordfree NEW: POSIX.2
1530 write_profiling REMOVED
1531 xdecrypt NEW: Secure RPC
1532 xdr_authdes_cred NEW: Secure RPC
1533 xdr_authdes_verf NEW: Secure RPC
1534 xdr_cryptkeyarg NEW: Secure RPC
1535 xdr_cryptkeyarg2 NEW: Secure RPC
1536 xdr_cryptkeyres NEW: Secure RPC
1537 xdr_getcredres NEW: Secure RPC
1538 xdr_key_netstarg NEW: Secure RPC
1539 xdr_key_netstres NEW: Secure RPC
1540 xdr_keybuf NEW: Secure RPC
1541 xdr_keystatus NEW: Secure RPC
1542 xdr_netnamestr NEW: Secure RPC
1543 xdr_sizeof NEW: Secure RPC
1544 xdr_unixcred NEW: sunrpc ext
1545 xencrypt NEW: Secure RPC
1546 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1547 \f
1548 Version 2.0.6
1550 * more bug fixes
1552 \f
1553 Version 2.0.5
1555 * more bug fixes
1557 * inet_ntoa is thread-safe
1559 * updwtmp is moved from libutil to libc
1561 * rewrite of cbrt function
1563 * update of timezone data
1564 \f
1565 Version 2.0.4
1567 * more bug fixes
1568 \f
1569 Version 2.0.3
1571 * more bug fixes
1572 \f
1573 Version 2.0.2
1575 * more bug fixes
1577 * add atoll function
1579 * fix complex problems in Berkeley DB code
1581 * fix math functions
1582 \f
1583 Version 2.0.1
1585 * fixed lots of header problems (especially Linux/GNU specific)
1587 * dynamic loader preserves all registers
1589 * Roland McGrath provided support for handling of auxiliary objects in
1590 the ELF dynamic loader.
1592 * support for parallel builds is improved
1593 \f
1594 Version 2.0
1596 * GNU extensions are no longer declared by default. To enable them you
1597 must define the macro `_GNU_SOURCE' in your program or compile with
1598 `-D_GNU_SOURCE'.
1600 * The library has changed from using GNU ld symbol aliases to using weak
1601 symbols where available. The ELF object file format supports weak
1602 symbols; GNU ld also supports weak symbols in the a.out format. (There
1603 is also now support for other GNU ld extensions in ELF. Use the
1604 `--with-elf' option to configure to indicate you have ELF, and
1605 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1606 of many files which contained only symbol aliases, reducing the size of
1607 the source and the compiled library; many other files were renamed to
1608 less cryptic names previously occupied by the symbol alias files.
1609 There is a new header file <elf.h> for programs which operate on
1610 files in the ELF format.
1612 * Converted to Autoconf version 2, so `configure' has more options.
1613 Run `configure --help' to see the details.
1615 * The library can now be configured to build profiling, highly-optimized
1616 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1617 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1618 `configure' enable building these extra libraries. The shared library is
1619 built by default when using both ELF and GNU ld. When shared libraries
1620 are enabled, the new library `-ldl' is available for arbitrary run-time
1621 loading of shared objects; its interface is defined in <dlfcn.h>. The
1622 new header file <link.h> gives access to the internals of the run-time
1623 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1624 application of same name on other systems and it provides information
1625 about dynamically linked binaries.
1627 * The C library now provides the run-time support code for profiling
1628 executables compiled with `-pg'. Programs can control the profiling code
1629 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1630 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1631 the support for this file format was contributed by David Mosberger-Tang.
1633 * The math code has been replaced with a math library based on fdlibm from
1634 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1635 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1636 functions. The math functions now reside in a separate library, so
1637 programs using them will need to use `-lm' their linking commands.
1639 * John C. Bowman contributed optimized ix87 assembler inline functions.
1641 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1642 mechanism similar to that found in Solaris 2. This is now used for the
1643 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1644 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1645 file controls what services are used for each individual database. This
1646 works by loading shared libraries with names specified in `nsswitch.conf',
1647 so service modules can be changed or added at any time without even
1648 relinking any program. Currently there are the file, db, and NIS based
1649 NSS services available.
1651 * The new functions `strtoq' and `strtouq' parse integer values from
1652 strings, like `strtol' and `strtoul', but they return `long long int' and
1653 `unsigned long long int' values, respectively (64-bit quantities).
1655 * The new functions `strtof' and `strtold' parse floating-point values from
1656 strings, like `strtod', but they return `float' and `long double' values,
1657 respectively (on some machines `double' and `long double' are the same).
1659 * Ulrich Drepper has contributed new implementations of the floating-point
1660 printing and reading code used in the `printf' family of functions and
1661 `strtod', `strtof', and `strtold'. These new functions are perfectly
1662 accurate, and much faster than the old ones.
1664 * The implementation of the POSIX locale model was completely rewritten by
1665 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1666 to compile the POSIX locale definition.
1668 * The former dummy implementations of the strcoll and strxfrm function are
1669 now replaced by fully functional code contributed by Ulrich Drepper. The
1670 collation information comes from the POSIX locale definitions.
1672 * The new header <langinfo.h> defines an interface for accessing
1673 various locale-dependent data (using the locale chosen with `setlocale').
1675 * Ulrich Drepper has contributed a new suite of functions for operation on
1676 wide-character and multibyte-character strings, in <wchar.h>;
1677 and classification and case conversion of wide characters, in <wctype.h>.
1678 These new functions are conforming to the ISO C, Amendement 1 specification.
1680 * There is now a second implementation of the standard I/O library available.
1681 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1682 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1684 * You can now use positional parameter specifications in format strings
1685 for the `printf' and `scanf' families of functions. For example,
1686 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1687 ``Number 6, Mr Jones''. This is mainly useful when providing different
1688 format strings for different languages, whose grammars may dictate
1689 different orderings of the values being printed. To support this
1690 feature, the interface for `register_printf_handler' has changed; see
1691 the header file <printf.h> for details.
1693 * The `printf' and `scanf' families of functions now understand a new
1694 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1695 to group numbers as indicated by the locale; for `scanf' and friends, this
1696 says to accept as valid only a number with all the proper grouping
1697 separators in the right places. In the default "C" locale, numbers are
1698 not grouped; but locales for specific countries will define the usual
1699 conventions (i.e. separate thousands with `,' in the US locale).
1701 * The pgrp functions have been regularized, slightly incompatibly but much
1702 less confusingly. The core functions are now `getpgid' and `setpgid',
1703 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1704 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1705 provided for compatibility. There is no longer an incompatible `getpgrp'
1706 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1708 * The new header file <fts.h> and suite of functions simplify programs that
1709 operate on directory trees. This code comes from 4.4 BSD.
1711 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1712 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1713 NSS scheme used in glibc.
1715 * There is a new malloc debugging hook `__memalign_hook'.
1717 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1718 `unsigned int' in <sys/types.h>. These are for compatibility only and
1719 their use is discouraged.
1721 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1722 done differently, so that it works even without GNU ld.
1724 * New function `euidaccess' checks allowed access to a file like `access',
1725 but using the effective IDs instead of the real IDs.
1727 * The time zone data files have been updated for the latest and greatest
1728 local time conventions of the countries of the world.
1730 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1731 see <dirent.h>.
1733 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1734 for formatting floating-point numbers. They are provided only for
1735 compatibility; new programs should use `sprintf' instead. There are
1736 also equivalent function for the `long double' floating-point type and
1737 all functions also exist in a reentrant form.
1739 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1740 functions for maintaining the login-record files (primarily of use to
1741 system programs such as `login'), and convenient functions for
1742 allocating and initializing a pseudo-terminal (pty) device.
1744 * Ulrich Drepper has contributed new support for System V style
1745 shared memory and IPC on systems that support it.
1747 * Ulrich Drepper has contributed several miscellaneous new functions found
1748 in System V: The `hsearch' family of functions provide an effective
1749 implementation of hash tables; `a64l' and `l64a' provide a very simple
1750 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1751 number generator.
1753 * Ulrich Drepper has contributed new reentrant counterparts for the
1754 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1756 * Ulrich Drepper has contributed new, highly-optimized versions of several
1757 string functions for the i486/Pentium family of processors.
1759 * Ulrich Drepper has updated the Linux-specific code, based largely
1760 on work done in Hongjiu Lu's version of GNU libc for Linux.
1761 The GNU library now supports Linux versions 2.0.10 and later,
1762 using the ELF object file format (i[3456]86-*-linux).
1764 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1766 * David Mosberger-Tang and Richard Henderson have ported the C library
1767 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1768 dynamic linking support for ELF/Alpha.
1770 * Richard Henderson contributed several Alpha optimized assembler function
1771 for arithmetic and string handling.
1773 * Ulrich Drepper has contributed a new set of message catalog functions to
1774 support multiple languages using the <libintl.h> interface, for use with
1775 his new package GNU gettext. Translation volunteers have contributed
1776 catalogs of the library's messages in Spanish, German, and Korean.
1778 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1779 program and the `catgets' function for reading the catalog files it
1780 creates. (The <libintl.h> interface is preferred; we include the
1781 <nl_types.h> interface using `catgets' only for source compatibility with
1782 programs already written to use it.)
1784 * New header file <values.h> gives SVID-compatible names for <limits.h>
1785 constants.
1787 * Various new macros, declarations, and small header files for compatibility
1788 with 4.4 BSD.
1790 * New function `group_member' is a convenient way to check if a process has
1791 a given effective group ID.
1793 * When using GCC 2.7 and later, the socket functions are now declared in a
1794 special way so that passing an argument of type `struct sockaddr_in *',
1795 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1796 `struct sockaddr *' type, does not generate a type-clash warning.
1798 * New function `error' declared in header file <error.h> is a convenient
1799 function for printing error messages and optionally exiting; this is the
1800 canonical function used in GNU programs. The new functions `err', `warn',
1801 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1802 doing the same thing.
1804 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1805 POSIX.2 `glob' function to do ~ and {...} expansion.
1807 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1808 `clearenv' which is used in POSIX.9 is also available.
1810 * New function `getsid' returns session ID number on systems that support it.
1812 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1813 files <db.h> and <mpool.h> provide a rich set of functions for several
1814 types of simple databases stored in memory and in files, and <ndbm.h> is
1815 an old `ndbm'-compatible interface using the `db' functions. Link with
1816 `-ldb' to get these functions.
1818 * New macro `strdupa' copies a string like `strdup', but uses local stack
1819 space from `alloca' instead of dynamic heap space from `malloc'.
1821 * New function `strnlen' is like `strlen' but searches only a given maximum
1822 number of characters for the null terminator. `stpncpy', `strndup' and
1823 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1824 function.
1826 * New function `statfs' in header <sys/statfs.h>.
1828 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1829 provide convenient functions for operating on blocks of null-terminated
1830 strings.
1832 * A new suite of functions in <utmp.h> handle all the details of reading
1833 and writing the utmp file.
1835 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1836 Thorsten Kukuk.
1838 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1839 completely POSIX compliant and also implemented the extended functionality
1840 to handle alternate digit representation and alternate era date formats.
1842 * Ulrich Drepper provided an implementation of the `strptime' function
1843 defined in XPG4.2 which transforms a string into a `struct tm' value.
1845 * Paul Eggert provided the tzselect shell script as part of the timezone
1846 code. The shell script makes it easy to select the correct timezone
1847 specification.
1849 * The implementation of the malloc family of functions is completely replaced
1850 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1851 The implementation uses the mmap function (if available) and it is
1852 optimized for the use in multi threaded programs.
1854 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1855 functions. This new functionality is usable by specifying a special
1856 salt string and it is compatible with implementation on *BSD systems.
1858 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1859 `getsubopt' to handle second level command line options, `bsd_signal'
1860 to access BSD style `signal' functionality, the obsolete `regexp' style
1861 expression matcher.
1863 * the `lchown' function is available on system which support this
1864 functionality.
1866 * The implementation of the shadow password handling function was contributed
1867 by Ulrich Drepper.
1869 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1871 * POSIX.1g support was added. The <sys/select.h> header is available,
1872 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1873 implementation of `getaddrinfo'.
1874 \f
1875 Version 1.09
1877 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1879 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1880 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1882 * The new function `daemon' from 4.4 BSD is useful for server programs that
1883 want to put themselves in the background.
1885 * Joel Sherrill has contributed support for several standalone boards that
1886 run without an operating system.
1888 * `printf', `scanf' and friends now accept a `q' type modifier for long
1889 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1891 * All of the code taken from BSD (notably most of the math and networking
1892 routines) has been updated from the BSD 4.4-Lite release.
1894 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1896 * The new functions `getdomainname' and `setdomainname' fetch or change the
1897 YP/NIS domain name. These are system calls which exist on systems which
1898 have YP (aka NIS).
1900 * The time zone data files have been updated for the latest international
1901 conventions.
1903 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1904 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1905 \f
1906 Version 1.08
1908 * The C library now includes support for Sun RPC, from Sun's free
1909 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1910 are included. (There is still no support for YP.)
1912 * Tom Quinn has contributed a port of the C library to SGI machines running
1913 Irix 4 (mips-sgi-irix4).
1915 * The new `lockf' function is a simplified interface to the locking
1916 facilities of `fcntl', included for compatibility.
1918 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1920 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1922 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1923 compatibility.
1925 * The error message printed by `assert' for a failed assertion now includes
1926 the name of the program (if using GNU ld) and the name of the calling
1927 function (with versions of GCC that support this).
1929 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1931 * The library now includes the <sys/mman.h> header file and memory
1932 management functions `mmap', `munmap', `mprotect', `msync', and
1933 `madvise', on systems that support those facilities.
1935 * The interface for `mcheck' has changed slightly: the function called to
1936 abort the program when an allocation inconsistency is detected now takes
1937 an argument that indicates the type of failure. The new function
1938 `mprobe' lets you request a consistency check for a particular block at
1939 any time (checks are normally done only when you call `free' or `realloc'
1940 on a block).
1942 * It is now possible to easily cross-compile the C library, building on one
1943 system a library to run on another machine and/or operating system. All
1944 you need to do is set the variable `HOST_CC' in `configparms' to the
1945 native compiler for programs to run on the machine you are building on (a
1946 few generator programs are used on Unix systems); set `CC' to the
1947 cross-compiler.
1949 * The new function `fexecve' (only implemented on the GNU system) executes
1950 a program file given a file descriptor already open on the file.
1951 \f
1952 Version 1.07
1954 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1955 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1957 * You can set the variable `libprefix' in `configparms' to specify a prefix
1958 to be prepended to installed library files; this makes it easy to install
1959 the GNU C library to be linked as `-lgnuc' or whatever.
1961 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1962 copies a limited number of characters from a string, and returns the
1963 address of the last character written.
1965 * You no longer need to check for whether the installed `stddef.h' is
1966 compatible with the GNU C library. configure now checks for you.
1968 * You can now define a per-stream `fileno' function to convert the
1969 stream's cookie into an integral file descriptor.
1971 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1972 allocates zero bytes of storage, and returns a unique pointer which
1973 you can pass to `realloc' or `free'. The behavior is undefined if
1974 you dereference this pointer.
1976 * The C library now runs on Sony NEWS m68k machines running either
1977 NewsOS 3 or NewsOS 4.
1979 * The new `syscall' function is a system-dependent primitive function
1980 for invoking system calls. It has the canonical behavior on Unix
1981 systems, including unreliable return values for some calls (such as
1982 `pipe', `fork' and `getppid').
1984 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1985 to `EAGAIN', which is the preferred name. On systems whose kernels
1986 use two distinct codes, the C library now translates EWOULDBLOCK to
1987 EAGAIN in every system call function.
1988 \f
1989 Version 1.06
1991 * The GNU C Library Reference Manual is now distributed with the library.
1992 `make dvi' will produce a DVI file of the printed manual.
1993 `make info' will produce Info files that you can read on line using C-h i
1994 in Emacs or the `info' program.
1995 Please send comments on the manual to bug-glibc-manual@gnu.org.
1997 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1999 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2001 * Jason Merrill has contributed a port to the Sequent Symmetry running
2002 Dynix version 3 (i386-sequent-dynix).
2004 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2005 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2007 * New function `memory_warnings' lets you arrange to get warnings when
2008 malloc is running out of memory to allocate, like Emacs gives you.
2010 * The C library now contains the relocating allocator used in Emacs 19 for
2011 its editing buffers. This allocator (ralloc) minimizes allocation
2012 overhead and fragmentation by moving allocated regions around whenever it
2013 needs to. You always refer to a ralloc'd region with a "handle" (a
2014 pointer to a pointer--an object of type `void **').
2016 * There is a new `printf' format: `%m' gives you the string corresponding
2017 to the error code in `errno'.
2019 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2020 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2021 pass, the `a' modifier says to fill in a `char **' you pass with a
2022 malloc'd string.
2024 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2025 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2026 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2028 * `mkstemp' is a traditional Unix function to atomically create and open a
2029 uniquely-named temporary file.
2030 \f
2031 Version 1.05
2033 * The standard location for the file that says what the local timezone is
2034 has changed again. It is now `/usr/local/etc/localtime' (or more
2035 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2037 * The distribution no longer contains any files with names longer than 14
2038 characters.
2040 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2041 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2043 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2044 \f
2045 Version 1.04
2047 * The configuration process has changed quite a bit. The `configure'
2048 script is now used just like the configuration scripts for other GNU
2049 packages. The `sysdeps' directory hierarchy is much rearranged.
2050 The file `INSTALL' explains the new scheme in detail.
2052 * The header files no longer need to be processed into ANSI C and
2053 traditional C versions. There is just one set of files to install, and
2054 it will work with ANSI or old C compilers (including `gcc -traditional').
2056 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2057 MIPS DECStation running Ultrix 4.
2059 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2060 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2061 made itself into a shared library.
2063 * Yet further improved support for the i386, running 4.3 BSD-like systems
2064 (such as Mach 3 with the Unix single-server), or System V.
2066 * New function `strncasecmp' to do case-insensitive string comparison
2067 with limited length.
2069 * New function `strsep' is a reentrant alternative to `strtok'.
2071 * New functions `scandir' and `alphasort' for searching directories.
2073 * New function `setenv' is a better interface to `putenv'.
2075 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2076 function for traversing a directory tree.
2078 * The GNU obstack package is now also part of the C library.
2079 The new function `open_obstack_stream' creates a stdio stream that
2080 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2081 formatted output directly to an obstack.
2083 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2084 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2086 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2088 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2089 things to your strings.
2091 * There are some new test programs: test-fseek, testmb, and testrand.
2093 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2094 These ports are not finished, but are a good starting place for really
2095 supporting those systems.
2097 * `/etc/localtime' is now the standard location for the file that says what
2098 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2099 This follows the general principle that `/etc' is the place for all local
2100 configuration files.
2102 * The C library header files now use `extern "C"' when used by the C++
2103 compiler, so the C library should now work with C++ code.
2105 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2106 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2107 in <strings.h>.)
2109 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2110 function which uses the `merge sort' algorithm, and is said to be
2111 significantly faster than the old GNU `qsort' function. Merge sort is
2112 now the standard `qsort' function. The new algorithm can require a lot
2113 of temporary storage; so, the old sorting function is called when the
2114 required storage is not available.
2116 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2117 provides the Unix `crypt' function, plus some other entry points.
2119 * The code and header files taken from 4.4 BSD have been updated with the
2120 latest files released from Berkeley.
2121 \f
2122 ----------------------------------------------------------------------
2123 Copyright information:
2125 Copyright (C) 1992-2012 Free Software Foundation, Inc.
2127 Permission is granted to anyone to make or distribute verbatim copies
2128 of this document as received, in any medium, provided that the
2129 copyright notice and this permission notice are preserved,
2130 thus giving the recipient permission to redistribute in turn.
2132 Permission is granted to distribute modified versions
2133 of this document, or of portions of it,
2134 under the above conditions, provided also that they
2135 carry prominent notices stating who last changed them.
2136 \f
2137 Local variables:
2138 version-control: never
2139 fill-column: 76
2140 End: