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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 1349, 3479, 5044, 5400, 6778, 6808, 9685, 9914, 10014, 10038, 11607,
13 13412, 13542, 13679, 13717, 13696, 13939, 13966, 14042, 14090, 14166,
14 14150, 14151, 14154, 14157, 14166, 14173, 14195, 14237, 14252, 14283,
15 14298, 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14459,
16 14476, 14505, 14510, 14516, 14518, 14519, 14532, 14538, 14544, 14545,
17 14562, 14576, 14579, 14583, 14587.
19 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
20 Optimized versions of memcpy, memset, and memcmp added for System z10 and
21 zEnterprise z196.
22 Implemented by Andreas Krebbel.
24 * The new function secure_getenv allows secure access to the environment,
25 returning NULL if running in a SUID/SGID process. This function replaces
26 the internal function __secure_getenv.
28 * SystemTap static probes have been added into the dynamic linker.
29 Implemented by Gary Benson.
31 * Optimizations of string functions strstr, strcasestr and memmem.
32 Implemented by Maxim Kuvyrkov.
34 * The minimum Linux kernel version that this version of the GNU C Library
35 can be used with is 2.6.16.
37 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
38 powerpc POWER7. Implemented by Will Schmidt.
40 * New configure option --disable-nscd builds the C library such that it
41 never attempts to contact the Name Service Caching Daemon (nscd).
42 New configure option --disable-build-nscd avoids building nscd itself;
43 this is the default if --disable-nscd is used.
45 * The ttyname and ttyname_r functions on Linux now fall back to searching for
46 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
47 allows creation of chroots without the procfs mounted on /proc.
49 \f
50 Version 2.16
52 * The following bugs are resolved with this release:
54 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
55 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
56 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
57 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
58 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
59 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
60 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097,
61 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058,
62 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532,
63 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566,
64 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658,
65 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739,
66 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806,
67 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871,
68 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895,
69 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918,
70 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938,
71 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973,
72 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040,
73 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075,
74 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134,
75 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277,
76 14278,
78 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
79 configuring glibc with:
80 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
81 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
82 Implemented by H.J. Lu.
84 * ISO C11 support:
86 + define static_assert
88 + do not declare gets
90 + declare at_quick_exit and quick_exit also for ISO C11
92 + aligned_alloc. NB: The code is deliberately allows the size parameter
93 to not be a multiple of the alignment. This is a moronic requirement
94 in the standard but it is only a requirement on the caller, not the
95 implementation.
97 + timespec_get added
99 + uchar.h support added
101 + CMPLX, CMPLXF, CMPLXL added
103 Implemented by Ulrich Drepper.
105 * Support for the IA-64 has been moved to ports.
107 * Remove support for anything but ELF binary format
109 * Checking versions of poll, ppoll added.
110 Implemented by Ulrich Drepper.
112 * More generic and 64-bit performance optimizations to math functions.
113 Implemented by Ulrich Drepper.
115 * New configure option --enable-obsolete-rpc makes the deprecated RPC
116 headers and functions available at compile time as they were before
117 version 2.14. This option will be removed at some time in the future
118 after the TI-RPC library becomes fully sufficient for the needs of
119 existing applications.
121 * Compatibility code for Linux kernel versions before 2.4 has been removed.
122 Note that glibc is not expected to work with any Linux kernel version
123 before 2.6.
125 * New header <sys/auxv.h> and function getauxval allowing easy access to
126 the AT_* key-value pairs passed from the Linux kernel. The header also
127 defines the HWCAP_* bits associated with the AT_HWCAP key.
129 * New locales: mag_IN
131 * New configure option --enable-systemtap builds SystemTap static probes
132 into libc for setjmp and longjmp and into libpthread for various operations.
133 So far the setjmp/longjmp probes and some of the libpthread probes are
134 provided only for i*86 and x86_64.
135 Implemented by Roland McGrath and Rayson Ho.
137 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
139 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
140 and Will Schmidt.
142 * More optimized functions for SPARC. Implemented by David S. Miller.
144 * Improved support for cross-compilation, especially bootstrap builds
145 without a previously built glibc.
147 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
148 Chris Metcalf from Tilera.
150 * Support for the old ARM ABI has been removed from ports. Only the EABI is
151 now supported for ARM processors.
153 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
154 as the name of the dynamic linker, to distinguish it from the
155 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
157 * Support for CRIS has been removed from ports.
159 * A new class of installed header has been documented for low-level
160 platform-specific functionality. PowerPC added the first instance with a
161 function to provide time base register access. Contributed by Tulio
162 Magno Quites Machado Filho.
164 * ix86 configurations now install header files that are consistent with
165 what x86-64 configurations install. These same header files can be used
166 for -m32, -m64, or -mx32 builds.
167 Contributed by H.J. Lu.
169 * Math library bug fixes. A thorough audit of all open math library bugs was
170 conducted by Joseph Myers. Significant progress was made on many math
171 library bugs resulting in more accurate exceptions and function results.
172 Many thanks to all those that contributed including Andreas Jaeger for his
173 patch review and work on the x87 trigonometric instruction issues.
175 * Timezone data is no longer installed. Timezone-related binaries and scripts
176 will continue to be installed. Users should obtain their timezone data from
177 their distribution provider or from the tzdata package at
178 <ftp://munnari.oz.au/pub/>.
179 \f
180 Version 2.15
182 * The following bugs are resolved with this release:
184 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
185 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
186 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
187 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
188 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
189 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
190 13484, 13506, 13515, 13523, 13524, 13538, 13540
192 * New program pldd to list loaded object of a process
193 Implemented by Ulrich Drepper.
195 * Add nss_db support back to glibc. No more dependency on Berkeley db
196 and support for initgroups lookups.
197 Implemented by Ulrich Drepper.
199 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
200 Contributed by HJ Lu.
202 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
203 Contributed by HJ Lu.
205 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
206 on x86-32 and x86-64.
207 Contributed by Liubov Dmitrieva.
209 * Optimized strchr and strrchr for SSE on x86-32.
210 Contributed by Liubov Dmitrieva.
212 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
213 for x86-64 and x86-32.
214 Contributed by Liubov Dmitrieva.
216 * New interfaces: scandirat, scandirat64
217 Implemented by Ulrich Drepper.
219 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
220 Implemented by Ulrich Drepper.
222 * nscd now also caches the netgroup database.
223 Implemented by Ulrich Drepper.
225 * Integrate libm with gcc's -ffinite-math-only option.
226 Implemented by Ulrich Drepper.
228 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
229 to math functions. Implemented by Ulrich Drepper.
231 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
232 Implemented by Ulrich Drepper.
234 * New Linux interfaces: process_vm_readv, process_vm_writev
236 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
237 Implemented by Ulrich Drepper.
239 * Optimized nearbyint and strcasecmp for PPC.
240 Implemented by Adhemerval Zanella.
242 * New locales: bho_IN, unm_US, es_CU, ta_LK
243 \f
244 Version 2.14
246 * The following bugs are resolved with this release:
248 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
249 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
250 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
251 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
252 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
253 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
254 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
255 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
256 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
257 12795, 12811, 12813, 12814, 12841
259 * The RPC implementation in libc is obsoleted. Old programs keep working
260 but new programs cannot be linked with the routines in libc anymore.
261 Programs in need of RPC functionality must be linked against TI-RPC.
262 The TI-RPC implementation is IPv6 enabled and there are other benefits.
264 Visible changes of this change include (obviously) the inability to link
265 programs using RPC functions without referencing the TI-RPC library and the
266 removal of the RPC headers from the glibc headers.
267 Implemented by Ulrich Drepper.
269 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
270 syncfs, setns, sendmmsg
272 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
273 yue_HK, lij_IT, mhr_RU
275 * New encodings: CP770, CP771, CP772, CP773, CP774
277 * New program sotruss to trace calls through PLTs
278 Implemented by Ulrich Drepper.
280 * The malloc hook implementation is marked deprecated and will be removed
281 from the default implementation in the next version. The design never
282 worked ever since the introduction of threads. Even programs which do
283 not create threads themselves can use multiple threads created internally.
284 \f
285 Version 2.13
287 * The following bugs are resolved with this release:
289 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
290 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
291 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
292 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
293 12378, 12394, 12397
295 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
297 * POWER7 optimizations: memset, memcmp, strncmp
299 * New optimized string functions for x86-64: strnlen (SSE2),
300 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
301 Implemented by Ulrich Drepper.
302 \f
303 Version 2.12
305 * The following bugs are resolved with this release:
307 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918,
308 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007,
309 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093,
310 11115, 11120, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
311 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
312 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
313 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
314 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
316 * New interfaces: pthread_getname_np, pthread_setname_np
318 * New Linux interface: recvmmsg
320 * STT_GNU_IFUNC implemented for Sparc by David Miller.
322 * The dynamic linker now recognizes supported ABI versions from the
323 EI_ABIVERSION field in the ELF header.
324 Implemented by Ulrich Drepper.
326 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
327 will not be used to fill in password fields in the passwd.byname replies.
328 Instead it is used to synthesize the shadow.byname table, should it be
329 missing. This is a useful mode in some installations involving Solaris.
330 Implemented by Ulrich Drepper.
332 * New locales: kok_IN, sq_MK, cv_RU
333 \f
334 Version 2.11
336 * The following bugs are resolved with this release:
338 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
339 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
340 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
341 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
342 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
343 10789, 10817, 10823, 10840, 10847
345 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
346 mkostemps64
347 Implemented by Ulrich Drepper.
349 * Checking version of longjmp added that fails if an uninitialized stack
350 frame would be created. Implemented by Ulrich Drepper.
352 * STT_GNU_IFUNC is now supported in static executables.
353 Implemented by H.J. Lu.
355 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
357 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
358 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
359 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
360 Contributed by H.J. Lu.
362 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
363 Implemented by Ulrich Drepper.
365 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
366 strstr, strcasestr.
367 Contributed by H.J. Lu.
369 * Support for fma instruction in AVX on x86-64.
370 Implemented by H.J. Lu and Ulrich Drepper.
372 * AVX support in x86-64 auditing support in ld.so.
373 Implemented by H.J. Lu.
375 * STB_GNU_UNIQUE support added.
376 Implemented by Ulrich Drepper.
378 * Implement second fallback mode for optimized DNS lookup for even more
379 broken environments. If two requests from the same port are not
380 handled correctly close the socket and open a new one before sending
381 the second request. The 'single-request-reopen' option in /etc/resolv.conf
382 can be used to select this mode right away, instead of rediscovering the
383 necessity is every process again.
384 Implemented by Ulrich Drepper.
386 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
387 Implemented by Adam Tkac.
389 * Optimized iconv conversions for S390x.
390 Implemented by Andreas Krebbel.
392 * Using condvars with PI mutexes is now more efficient due to kernel
393 support for requeueing to PI futexes. NPTL support added for x86-64.
394 Implemented by Ulrich Drepper.
396 * New locales: ps_AF, my_MM
397 \f
398 Version 2.10
400 * The following bugs are resolved with this release:
402 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
403 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
404 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
405 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
406 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
408 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
409 Implemented by Ulrich Drepper.
411 * New Linux interfaces: accept4, fallocate, fallocate64.
412 Implemented by Ulrich Drepper.
414 * Correct declarations of string function when used in C++ code. This
415 could lead to compile errors for invalid C++ code.
417 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
418 now in POSIX.
420 * New POSIX 2008 interface: psiginfo
421 Implemented by Ulrich Drepper.
423 * New ISO C++1x interfaces: quick_exit, at_quick_exit
424 Implemented by Ulrich Drepper.
426 * Support for selecting between multiple function definitions at runtime
427 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
429 * The libcrypt library can now use the hash function implementations in
430 NSS. Implemented by Ulrich Drepper.
432 * The malloc implementation can be compiled to be less memory efficient
433 but higher performing in multi-threaded programs.
434 Implemented by Ulrich Drepper.
436 * New locales: nan_TW@latin, ks_IN
438 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
439 Implemented by Ulrich Drepper.
441 * Extended printf hook support. It is possible to use user-defined types
442 and extend existing format specifiers.
443 Implemented by Ulrich Drepper.
445 * Handling for group shadow files has been added.
446 Implemented by Ulrich Drepper.
448 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
449 servers (the case, e.g., for some people using the built-in DNS
450 server in ADSL modems/routers). There is a once-per-process timeout
451 in case of a broken server. To avoid it, users can run nscd or put
452 'options single-request' in /etc/resolv.conf.
453 Implemented by Ulrich Drepper.
454 \f
455 Version 2.9
457 * The following bugs are resolved with this release:
459 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
460 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
461 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
462 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
463 6968, 6974, 6980, 6995, 7008, 7009, 7029
465 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
466 up at the same time. Implemented by Ulrich Drepper.
468 * TLS descriptors for LD and GD on x86 and x86-64.
469 Implemented by Alexandre Oliva.
471 * getaddrinfo now handles DCCP and UDPlite.
472 Implemented by Ulrich Drepper.
474 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
475 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
476 Implemented by Ulrich Drepper.
478 * New implementation of memmem, strstr, and strcasestr which is O(n).
479 Implemented by Eric Blake.
481 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
483 * Implement "e" option for popen to open file descriptor with the
484 close-on-exec flag set. Implemented by Ulrich Drepper.
486 * Implement "b" mode for fmemopen. In this mode writes writes don't
487 implicitly add a NUL byte and seeks from the end of the buffer really
488 use the buffer end, not the string length as the basis.
489 Implemented by Ulrich Drepper.
491 * Many functions, exported and internal, now atomically set the close-on-exec
492 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
494 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
495 Sinhala)
496 Implemented by Pravin Satpute.
498 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
499 \f
500 Version 2.8
502 * The following bugs are resolved with this release:
504 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
505 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
506 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
507 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
508 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
509 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
510 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
512 * New locales: bo_CN, bo_IN, shs_CA.
514 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
516 * Sorting rules for some Indian languages (Devanagari and Gujarati).
517 Implemented by Pravin Satpute.
519 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
521 * nscd caches now all timeouts for DNS entries
522 Implemented by Ulrich Drepper.
524 * nscd is more efficient and wakes up less often.
525 Implemented by Ulrich Drepper.
527 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
528 vdprintf, and obstack_vprintf.
529 Implemented by Jakub Jelinek.
531 * Faster memset for x86-64.
532 Implemented by Harsha Jagasia and H.J. Lu.
534 * Faster memcpy on x86.
535 Implemented by Ulrich Drepper.
537 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
538 Implemented by Ulrich Drepper.
540 * Faster sqrt and sqrtf implemention for some PPC variants.
541 Implemented by Steven Munroe.
542 \f
543 Version 2.7
545 * The following bugs are resolved with this release:
547 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
548 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
549 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
550 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
551 5071, 5103, 5104, 5112, 5113, 5184, 5186
553 * More checking functions: fread, fread_unlocked, open*, mq_open.
554 Implemented by Jakub Jelinek and Ulrich Drepper.
556 * Extend fortification to C++. Implemented by Jakub Jelinek.
558 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
559 by not recognizing 'a' as a modifier when those specs are requested.
560 Implemented by Jakub Jelinek.
562 * PPC optimizations to math and string functions.
563 Implemented by Steven Munroe.
565 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
566 options to be passed. Implemented by Ulrich Drepper.
568 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
570 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
571 Implemented by Ulrich Drepper.
573 * Handle private futexes in the NPTL implementation.
574 Implemented by Jakub Jelinek and Ulrich Drepper.
576 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
577 Implemented by Roland McGrath and Ulrich Drepper.
579 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
581 * SHA-256 and SHA-512 based password encryption.
582 Implemented by Ulrich Drepper.
584 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
585 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
586 yo_NG.
588 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
589 Implemented by Ulrich Drepper.
590 \f
591 Version 2.6
593 * The following bugs are resolved with this release:
595 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
596 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
597 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
598 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
599 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
600 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
601 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
602 4702, 4858
604 * New Linux interfaces: epoll_pwait, sched_getcpu.
606 * New generic interfaces: strerror_l.
608 * nscd can now cache the services database. Implemented by Ulrich Drepper.
609 \f
610 Version 2.5
612 * The following bugs are resolved with this release:
614 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
615 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
616 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
617 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
618 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
619 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
620 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
621 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
622 3225, 3251, 3252, 3253, 3273
624 * For Linux, the sorting of addresses returned by getaddrinfo now also
625 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
626 Implemented by Ulrich Drepper.
628 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
629 Implemented by Ulrich Drepper.
631 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
633 * New iconv module for MIK. Contributed by Alexander Shopov.
635 * For sites with broken group and/or passwd database, the auto-propagate
636 option of nscd can prevent creating ID lookup entries from the results
637 of a name lookup and vice versa. This usually is no problem but some
638 site might have problems with the default behavior.
639 Implemented by Ulrich Drepper.
641 * Iterating over entire database in NIS can be slow. With the
642 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
643 to trade time for memory. The entire database will be read at once.
644 Implemented by Ulrich Drepper.
646 * The interfaces introduced in RFC 3542 have been implemented by
647 Ulrich Drepper.
649 * Support for the new ELF hash table format was added by Ulrich Drepper.
651 * Support for priority inheritance mutexes added by Jakub Jelinek and
652 Ulrich Drepper.
654 * Support for priority protected mutexes added by Jakub Jelinek.
656 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
657 or_IN, csb_PL, fy_NL, sr_ME.
658 \f
659 Version 2.4
661 * More overflow detection functions.
663 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
664 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
666 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
667 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
668 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
669 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
670 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
671 by Masahide Washizawa.
673 * It is now possible to install audit libraries for the dynamic linker using
674 LD_AUDIT. Implemented by Ulrich Drepper.
676 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
677 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
678 For a libc and libpthread that works well on Linux 2.4 kernels, we
679 recommend using the stable 2.3 branch.
681 * The new function open_wmemstream acts like open_memstream,
682 but uses a wchar_t wide character buffer.
684 * The new function ppoll is an improved version of poll, similar to pselect.
686 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
687 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
688 renameat, unlinkat, linkat, symlinkat, readlinkat.
690 * New Linux kernel system calls: unshare,
691 inotify_init, inotify_add_watch, inotify_rm_watch.
693 * The euidaccess function is now also known by the alias eaccess,
694 for compatibility with some other systems.
696 * Timezone data updated to 2006b version.
697 \f
698 Version 2.3.6
700 * The following bugs are resolved with this release:
702 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
703 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
704 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
705 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
706 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
707 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
709 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
711 * As of this release, GCC 4 can be used to compile the C Library.
713 * Timezone data updated to 2005m version.
714 \f
715 Version 2.3.5
717 * The following bugs are resolved with this release:
719 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
720 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
721 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
722 777, 787, 821, 822, 823, 825
724 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
725 \f
726 Version 2.3.4
728 * Support for RFC 3678. Real implementations exist only for Linux so far.
729 Implemented by Ulrich Drepper.
731 * nscd can now cache entries persistently. Expiring entries are reloaded.
732 For speedups the cache can be shared in memory with client processes.
733 Implemented by Ulrich Drepper.
735 * nscd can now perform SELinux checks.
736 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
738 * getaddrinfo queries are now cached. Canonical name lookup is performed
739 efficiently.
740 Implemented by Ulrich Drepper.
742 * The nothrow function attribute is used when headers are used by gcc when
743 compiling C code. This can avoid significant amounts of exception
744 handling data.
746 * The malloc functions perform more error checking and are stricter when
747 it comes to reacting on errors. The default action is to terminate
748 the process after showing an error message. Implemented by Ulrich Drepper.
750 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
751 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
753 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
754 namespaces using the new function dlmopen(). This feature is of course,
755 like most other dynamic loading functionality, not available in statically
756 linked applications. Implemented by Ulrich Drepper.
758 * Low-overhead boundary checking variants of string and some stdio functions
759 were added. These are to be used in conjunction with a gcc patch by
760 Jakub Jelinek which adds calls to these functions if possible.
761 Implemented by Jakub Jelinek and Ulrich Drepper.
763 * Old code for several operating systems and machine architectures that
764 have not been in working condition in a long time have been removed from
765 the main source tree maintained by the GNU C Library's maintainers.
766 These files are now reside in the separate `ports' source module
767 that is usable as an add-on when building the library.
768 \f
769 Version 2.3.3
771 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
772 interrogate the dynamic linker, compatible with the Solaris interface.
774 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
775 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
777 * getifaddrs now uses the netlink interface on Linux to get its information.
778 Implemented by Thorsten Kukuk.
780 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
781 Implemented by Ulrich Drepper.
783 * support for non-executable stacks on x86 has been added. Changes mostly
784 by Roland McGrath.
786 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
787 and Ulrich Drepper.
789 * getaddrinfo now performs destination address selection according to
790 RFC 3484.
791 \f
792 Version 2.3.2
794 * Thread-safe interfaces for many functions that access locale data
795 were added in version 2.3, but these features were omitted from NEWS.
796 Many functions have variants with an `_l' suffix that take a `locale_t'
797 object as a parameter rather than consulting the current locale.
798 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
799 create and maintain `locale_t' objects. Additionally, the new function
800 `uselocale' sets "the current locale" (as used by functions not so
801 parameterized) set for an individual thread. These features were added
802 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
804 * The functions getresuid, getresgid, setresuid, and setresgid, which
805 have long been available on Linux, are now declared in <unistd.h>
806 and are now also available on the Hurd.
808 * ELF thread-local storage support (TLS) now works on x86-64.
810 * The new dynamic string token $LIB is expanded in shared library names.
811 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
813 * Aldy Hernandez contributed complete software floating point support for
814 PowerPC machines with no FPU.
816 * fexecve is implemented on Linux.
818 * The `btowc' function should work at least twice as fast due to
819 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
821 * With approriate thread add-ons cancelable functions are now implemented
822 in libc.so as well. No need to call the function in libpthread. This
823 change allowed to finally disable the incorrect and expensive handling
824 of weak definition in ld.so.
826 * Yet more PLT entries in libc.so have been removed. We finally arrived
827 at the bare minimum. Startup times improved appropriately.
829 * Support for the new Linux/x86 system call interface was added. The
830 AT_SYSINFO auxiliary vector entry is recognized and handled.
831 \f
832 Version 2.3
834 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
835 charsets.
837 * iconv (the program and the interface) now accepts empty names (excluding
838 options like //TRANSLIT) to mean "use charset of current locale".
840 * localedef can now transliterate characters in strings which are not in
841 the provided charmap. The information from the input locale is used.
843 * Prelinking support was added for ELF targets. This requires additional
844 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
846 * Read-only stdio streams now use mmap to speed up operation by eliminating
847 copying and buffer underflows. To use add 'm' to the mode string of
848 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
850 * The malloc functions were completely rewritten by Wolfram Gloger based
851 on Doug Lea's malloc-2.7.0.c.
853 * Isamu Hasegawa contributed a completely new and POSIX-conformant
854 implementation of regex.
856 * Bruno Haible upgraded the iconv and locale implementation to support
857 Unicode 3.2.
859 * Contents of the LC_* and LANG environment variables in the CEN style are
860 not recognized anymore. It never was used. Change by Ulrich Drepper.
862 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
863 thread-local storage (TLS) ABI on some platforms.
864 Changes by Ulrich Drepper. SH support by Kaz Kojima.
866 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
867 EUC-JISX0213, and TSCII.
869 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
870 BSD-compatible interface for getting all network interface addresses.
871 Implementation for IPv4 by Roland McGrath.
873 * Loading of locale data is faster due to the introduction of a locale
874 archive. Implemented by Roland McGrath and Ulrich Drepper.
876 * Startup times are significantly reduced by not using exported functions
877 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
878 and Ulrich Drepper.
880 * Steven Munroe contributed a port to PowerPC64/Linux.
881 \f
882 Version 2.2.6
884 * The Hurd now uses the GNU libio implementation of stdio rather than the
885 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
887 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
888 with the same behavior as the Linux system call of the same name.
889 \f
890 Version 2.2.5
892 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
893 128-bit long double format.
895 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
896 IBM1161, and IBM1162 charsets.
898 * Andreas Jaeger contributed a port to x86-64/Linux.
900 * Peter Bruin contributed a port to PowerPC/Hurd.
902 * libc functions using I/O streams now can handle wide-oriented streams
903 as well.
905 * optimizations in the dynamic linker. Binaries created by recent binutils
906 versions start up quicker due to reduced time spent on relocations.
908 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
909 \f
910 Version 2.2.4
912 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
913 asinh, atanh, j0 for the 128-bit long double format.
915 * Bruno Haible updated all the code handling Unicode in some form to
916 support Unicode 3.1.
918 * Speed of regex for single-byte locales is back to previous levels.
919 Patch by Isamu Hasegawa.
921 * Alpha, SPARC, and IA-64 now also using floating stacks.
923 * Startup time of internationalized applications greatly improved through
924 iconv cache. Use iconvconfig to generate the cache file.
925 Contributed by Ulrich Drepper.
927 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
928 severe performance problems. Patch by David Mosberger.
930 * The Hurd port got a lot more functionality like AIO, various stdio
931 extensions, etc. Mainly done by Roland McGrath.
933 * mtrace can now lookup symbols in shared libraries.
934 \f
935 Version 2.2.3
937 * Intel's IA-64 math library is largely integrated. It provides fast and
938 accurate implementatations for most basic and standard math functions
939 in float, double, and long double format.
941 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
942 and asin for the 96-bit long double format and asin, log, tan for the
943 128-bit long double format.
945 * The beginning of a last-bit accurate math library by IBM Haifa were added.
946 The basic double functions exist today. Contributed by Abraham Ziv
947 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
948 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
950 * An asynchronous name lookup library was added. The interface is designed
951 after POSIX AIO. The proposal was circulated beforehand to get comments.
952 No negative ones came in. Implemented by Ulrich Drepper.
954 * Port to S390/64bit contributed by Martin Schwidefsky
955 <schwidefsky@de.ibm.com>.
957 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
958 of functions for Linux/IA-64.
960 * The RPC code is now thread safe. Threads can now use the same service
961 of different services at the same time. Patch by Eric Norum
962 <eric.norum@usask.ca> with some help by Ulrich Drepper.
964 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
965 family of functions for Linux/S390.
967 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
968 of functions for Linux/x86.
970 * Port to Linux/CRIS contributed by Axis Communications.
971 \f
972 Version 2.2.2
974 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
975 we can now check for namespace violations and missing declarations. The
976 result is that almost all headers are now Unix-compliant (as defined in
977 the upcoming XPG6). The negative side is that some programs might need
978 corrections, too, if they depend on the incorrect form of the headers in
979 previous versions which defined too many symbols and included too many
980 other headers.
982 * regex now handles multibyte character sets correctly.
983 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
985 * iconv (the program) does now conform to the upcoming XPG6 and handles
986 charmaps. Instead of the charset names the path of charmaps can be
987 provided and the conversion happens based on this data.
988 Contributed by Ulrich Drepper.
990 * The locale program now provides detailed information about the installed
991 locales. While
993 locale -a
995 only lists the names of the supported locales
997 locale -a --verbose
999 provides details such as country, language, and codeset name.
1000 Contributed by Ulrich Drepper.
1001 \f
1002 Version 2.2.1
1004 * The gencat program now parses the input file according to the charset
1005 selected by the LC_CTYPE category. This is important for stateful
1006 character sets. To make generating catalogs easier there is a way
1007 to overwrite the charset selected by the locale: before the first
1008 message or $ quote line the catalog can contain a line like
1010 $ codeset=ISO-8859-2
1012 to select the charset (ISO-8859-2 in this case).
1014 Implemented by Shinya Hanataka and Ulrich Drepper.
1016 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1017 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1018 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1020 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1021 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1023 * The LANGUAGE environment variable is now ignored unless the locale is
1024 changed from the default "C" locale.
1026 * The usual bug fixes.
1027 \f
1028 Version 2.2
1030 * Greg McGary added runtime support for bounds checking using gcc's
1031 new -fbounded-pointers option. ix86 target is complete. PowerPC
1032 is in progress.
1034 * Thorsten Kukuk added secure mode support to nscd.
1036 * The Berkeley db libraries have been removed.
1038 Related, the nss_db module is now in a separate package since it
1039 obviously requires a database library being available.
1041 * Wide character I/O streams implemented by Ulrich Drepper.
1043 * Functions from the extended socket API added by Ulrich Drepper.
1045 * Functions feenableexcept and fedisableexcept to control the
1046 behaviour of individual exceptions have been added by Andreas Jaeger.
1048 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1050 * The resolver code has been updated from bind 8.2.3-T5B which supports
1051 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1052 and Mark Kettenis.
1054 This change could in some situations effect backward compatibility. Since
1055 now `_res' is a thread-local instead of a global variable, modifying it
1056 in one thread does not have any effect in other threads.
1058 The resolver library was also extended to allow IPv6 as the transport
1059 protocol for the requests. This work was done by Stig Venaas.
1061 * Compatibility code for K&R C compilers has been removed from the
1062 header files. A ISO C compiler is needed to use the library
1063 (conforming to either C89 or C99 standard).
1065 * Complete rewrite of the localedef program to support multibyte character
1066 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1067 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1068 Implemented by Ulrich Drepper.
1070 Bruno Haible significantly improved the generation and use of the data
1071 structures for the wide character tables.
1073 * Plural handling in gettext implemented by Ulrich Drepper.
1075 * The utmp daemon has been removed.
1077 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1079 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1080 and Yutaka Niibe.
1082 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1084 * POSIX barriers implemented by Kaz Kylheku.
1086 * POSIX spawn function family implemented by Ulrich Drepper.
1088 * POSIX spinlocks are now available.
1090 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1092 * the configure option --enable-kernel=X.Y.Z allows to strip out
1093 compatibility for kernel versions before X.Y.Z. This is currently only
1094 implemented for Linux.
1096 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1097 field sin6_scope_id. This means that all programs using IPv6 should be
1098 recompiled. Don't expect binary compatibility with previous glibc
1099 versions.
1101 * various conversion modules for IBM character sets contributed by
1102 Masahide Washizawa.
1104 * IA-64 port by Jes Sorensen and HJ Lu.
1105 \f
1106 Version 2.1.3
1108 * bug fixes
1110 \f
1111 Version 2.1.2
1113 * bug fixes
1115 \f
1116 Version 2.1.1
1118 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1120 * New xdr functions are added; some rpc functions are now 64bit clean.
1122 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1124 * Fixed known incompatibilities with glibc 2.0.
1126 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1128 * Optimized a number of functions (especially the ELF dynamic loader).
1130 * Update timezone data files.
1132 * lots of charmaps corrections
1134 * some new locale definitions and charmaps
1136 \f
1137 Version 2.1
1139 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1140 conform to POSIX member type requirements. Symbol versions have been
1141 adjusted as needed within the library, and for direct use by applications,
1142 but there is potential for problems if third-party libraries use
1143 struct timeval as part of their interface. This does not present
1144 a problem for X and other "essential" system libraries.
1146 * An additional locale model to support C++ Standard Library locale
1147 model and probably more was implemented by Ulrich Drepper.
1149 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1150 symbol level.
1152 * Miles Bader provided the `argp' function family to support hierachical
1153 command line argument parsing, layered on top of getopt.
1155 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1157 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1158 numbers.
1160 * scanf recognizes the %a and %A format for scanning floating point numbers.
1162 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1163 information and interfaces for the available integer types.
1165 * about 130 new math functions were added to implement the ISO C9x math
1166 library.
1168 * the new header <complex.h> contains definitions of the complex math
1169 functions from ISO C 9X.
1171 * the new header <tgmath.h> defines generic macros to use complex or
1172 real valued functions.
1174 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1176 * Andreas Jaeger provided a test suite for the math library.
1178 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1180 * Ulrich Drepper added character set conversion functions (iconv).
1182 * Optimized string functions have been added.
1184 * The localedata addon is now part of glibc.
1186 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1188 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1189 daemon for NSS (nscd).
1191 Missing a better place here are some numbers on improvements. Under
1192 Linux 2.1.125 un-tar-ing the kernel sources takes
1194 user system wall
1196 using local files 12.19s 6.88s 22.91s
1198 using NIS 13.92s 8.91s 26.34s
1200 using NIS & nscd 10.37s 7.34s 25.30s
1202 using NIS+ 27.57s 30.37s 640.46s
1204 using NIS+ & nscd 10.25s 7.83s 26.51s
1206 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1208 Keep in mind that non-namelookup related operations dominate above times.
1209 It was just a common complain that using NIS+ unpacking the kernel is
1210 horribly slow.
1212 [1] The old nscd implementation is not available anymore since it was
1213 distributed with glibc up to version 2.0.98 and thus is now replaced.
1215 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1217 * Mark Kettenis provided a Hesiod NSS module.
1219 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1220 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1222 * rcmd can now handle netgroups (Dick Streefland).
1224 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1225 Bambrough.
1227 * Support for the IPv6 protocol has been added to the socket API, as per the
1228 latest draft standards.
1230 * Support for Linux 2.2 has been added.
1232 * Interface changes relative to the latest 2.0.x release:
1233 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1234 addseverity NEW: Unix98
1235 alphasort64 NEW: LFS
1236 argp_err_exit_status NEW: argp, GNU ext
1237 argp_error NEW: argp, GNU ext
1238 argp_failure NEW: argp, GNU ext
1239 argp_help NEW: argp, GNU ext
1240 argp_parse NEW: argp, GNU ext
1241 argp_program_bug_address NEW: argp, GNU ext
1242 argp_program_version NEW: argp, GNU ext
1243 argp_program_version_hook NEW: argp, GNU ext
1244 argp_state_help NEW: argp, GNU ext
1245 argp_usage NEW: argp, GNU ext
1246 authdes_create NEW: Secure RPC
1247 authdes_getucred NEW: Secure RPC
1248 authdes_pk_create NEW: Secure RPC
1249 backtrace NEW: GNU ext.
1250 backtrace_symbols NEW: GNU ext.
1251 backtrace_symbols_fd NEW: GNU ext.
1252 cacos NEW: ISO C 9x
1253 cacosf NEW: ISO C 9x
1254 cacosh NEW: ISO C 9x
1255 cacoshf NEW: ISO C 9x
1256 cacoshl NEW: ISO C 9x
1257 cacosl NEW: ISO C 9x
1258 capget NEW: kernel
1259 capset NEW: kernel
1260 carg NEW: ISO C 9x
1261 cargf NEW: ISO C 9x
1262 cargl NEW: ISO C 9x
1263 casin NEW: ISO C 9x
1264 casinf NEW: ISO C 9x
1265 casinh NEW: ISO C 9x
1266 casinhf NEW: ISO C 9x
1267 casinhl NEW: ISO C 9x
1268 casinl NEW: ISO C 9x
1269 catan NEW: ISO C 9x
1270 catanf NEW: ISO C 9x
1271 catanh NEW: ISO C 9x
1272 catanhf NEW: ISO C 9x
1273 catanhl NEW: ISO C 9x
1274 catanl NEW: ISO C 9x
1275 cbc_crypt NEW: Secure RPC
1276 ccos NEW: ISO C 9x
1277 ccosf NEW: ISO C 9x
1278 ccosh NEW: ISO C 9x
1279 ccoshf NEW: ISO C 9x
1280 ccoshl NEW: ISO C 9x
1281 ccosl NEW: ISO C 9x
1282 cexp NEW: ISO C 9x
1283 cexpf NEW: ISO C 9x
1284 cexpl NEW: ISO C 9x
1285 cimag NEW: ISO C 9x
1286 cimagf NEW: ISO C 9x
1287 cimagl NEW: ISO C 9x
1288 clearerr_locked REMOVED
1289 clntunix_create NEW: sunrpc ext
1290 clog NEW: ISO C 9x
1291 clog10 NEW: ISO C 9x
1292 clog10f NEW: ISO C 9x
1293 clog10l NEW: ISO C 9x
1294 clogf NEW: ISO C 9x
1295 clogl NEW: ISO C 9x
1296 conj NEW: ISO C 9x
1297 conjf NEW: ISO C 9x
1298 conjl NEW: ISO C 9x
1299 cpow NEW: ISO C 9x
1300 cpowf NEW: ISO C 9x
1301 cpowl NEW: ISO C 9x
1302 cproj NEW: ISO C 9x
1303 cprojf NEW: ISO C 9x
1304 cprojl NEW: ISO C 9x
1305 creal NEW: ISO C 9x
1306 crealf NEW: ISO C 9x
1307 creall NEW: ISO C 9x
1308 creat64 NEW: LFS
1309 csin NEW: ISO C 9x
1310 csinf NEW: ISO C 9x
1311 csinh NEW: ISO C 9x
1312 csinhf NEW: ISO C 9x
1313 csinhl NEW: ISO C 9x
1314 csinl NEW: ISO C 9x
1315 csqrt NEW: ISO C 9x
1316 csqrtf NEW: ISO C 9x
1317 csqrtl NEW: ISO C 9x
1318 ctan NEW: ISO C 9x
1319 ctanf NEW: ISO C 9x
1320 ctanh NEW: ISO C 9x
1321 ctanhf NEW: ISO C 9x
1322 ctanhl NEW: ISO C 9x
1323 ctanl NEW: ISO C 9x
1324 des_setparity NEW: Secure RPC
1325 ecb_crypt NEW: Secure RPC
1326 endutxent NEW: Unix98
1327 exp10 NEW: ISO C 9x
1328 exp10f NEW: ISO C 9x
1329 exp10l NEW: ISO C 9x
1330 exp2 NEW: ISO C 9x
1331 exp2f NEW: ISO C 9x
1332 exp2l NEW: ISO C 9x
1333 fattach NEW: STREAMS
1334 fdetach NEW: STREAMS
1335 fdim NEW: ISO C 9x
1336 fdimf NEW: ISO C 9x
1337 fdiml NEW: ISO C 9x
1338 feclearexcept NEW: ISO C 9x
1339 fegetenv NEW: ISO C 9x
1340 fegetexceptflag NEW: ISO C 9x
1341 fegetround NEW: ISO C 9x
1342 feholdexcept NEW: ISO C 9x
1343 feof_locked REMOVED
1344 feraiseexcept NEW: ISO C 9x
1345 ferror_locked REMOVED
1346 fesetenv NEW: ISO C 9x
1347 fesetexceptflag NEW: ISO C 9x
1348 fesetround NEW: ISO C 9x
1349 fetestexcept NEW: ISO C 9x
1350 feupdateenv NEW: ISO C 9x
1351 fflush_locked REMOVED
1352 ffsl NEW: GNU ext.
1353 ffsll NEW: GNU ext.
1354 fgetpos64 NEW: LFS
1355 fgets_unlocked NEW: GNU ext.
1356 fileno_locked REMOVED
1357 fma NEW: ISO C 9x
1358 fmaf NEW: ISO C 9x
1359 fmal NEW: ISO C 9x
1360 fmax NEW: ISO C 9x
1361 fmaxf NEW: ISO C 9x
1362 fmaxl NEW: ISO C 9x
1363 fmin NEW: ISO C 9x
1364 fminf NEW: ISO C 9x
1365 fminl NEW: ISO C 9x
1366 fmtmsg NEW: Unix98
1367 fopen64 NEW: LFS
1368 fputc_locked REMOVED
1369 fputs_unlocked NEW: GNU ext.
1370 fread_unlocked NEW: GNU ext.
1371 freopen64 NEW: LFS
1372 fseeko NEW: Unix98
1373 fsetpos64 NEW: LFS
1374 fstatfs64 NEW: LFS
1375 fstatvfs NEW: Unix98
1376 fstatvfs64 NEW: LFS
1377 ftello NEW: Unix98
1378 ftello64 NEW: LFS
1379 ftruncate64 NEW: LFS
1380 ftw64 NEW: LFS
1381 fwrite_unlocked NEW: GNU ext.
1382 gai_strerror NEW: IPv6
1383 gamma_r REMOVED
1384 gammaf_r REMOVED
1385 gammal_r REMOVED
1386 getchar_locked REMOVED
1387 getdate NEW: Unix98
1388 getdate_err NEW: Unix98
1389 getdate_r NEW: GNU ext.
1390 getmsg NEW: STREAMS
1391 getnameinfo NEW: IPv6
1392 getnetname NEW: Secure RPC
1393 getpmsg NEW: STREAMS
1394 getpt NEW: Unix98 PTY
1395 getrlimit64 NEW: LFS
1396 getutxent NEW: Unix98
1397 getutxid NEW: Unix98
1398 getutxline NEW: Unix98
1399 glob64 NEW: GNU ext.
1400 globfree64 NEW: GNU ext.
1401 gnu_get_libc_release NEW: GNU ext.
1402 gnu_get_libc_version NEW: GNU ext.
1403 grantpt NEW: Unix98 PTY
1404 host2netname NEW: Secure RPC
1405 iconv NEW: iconv
1406 iconv_close NEW: iconv
1407 iconv_open NEW: iconv
1408 if_freenameindex NEW: IPv6
1409 if_indextoname NEW: IPv6
1410 if_nameindex NEW: IPv6
1411 if_nametoindex NEW: IPv6
1412 in6addr_any NEW: IPv6
1413 in6addr_loopback NEW: IPv6
1414 inet6_isipv4mapped NEW: IPv6
1415 isastream NEW: STREAMS
1416 iswblank NEW: GNU ext.
1417 key_decryptsession NEW: Secure RPC
1418 key_decryptsession_pk NEW: Secure RPC
1419 key_encryptsession NEW: Secure RPC
1420 key_encryptsession_pk NEW: Secure RPC
1421 key_gendes NEW: Secure RPC
1422 key_get_conv NEW: Secure RPC
1423 key_secretkey_is_set NEW: Secure RPC
1424 key_setnet NEW: Secure RPC
1425 key_setsecret NEW: Secure RPC
1426 llrint NEW: ISO C 9x
1427 llrintf NEW: ISO C 9x
1428 llrintl NEW: ISO C 9x
1429 llround NEW: ISO C 9x
1430 llroundf NEW: ISO C 9x
1431 llroundl NEW: ISO C 9x
1432 log2 NEW: ISO C 9x
1433 log2f NEW: ISO C 9x
1434 log2l NEW: ISO C 9x
1435 lrint NEW: ISO C 9x
1436 lrintf NEW: ISO C 9x
1437 lrintl NEW: ISO C 9x
1438 lround NEW: ISO C 9x
1439 lroundf NEW: ISO C 9x
1440 lroundl NEW: ISO C 9x
1441 lseek64 NEW: LFS
1442 makecontext NEW: Unix98
1443 mempcpy NEW: GNU ext.
1444 mmap64 NEW: LFS
1445 moncontrol REMOVED
1446 modify_ldt NEW: kernel
1447 nan NEW: ISO C 9x
1448 nanf NEW: ISO C 9x
1449 nanl NEW: ISO C 9x
1450 nearbyint NEW: ISO C 9x
1451 nearbyintf NEW: ISO C 9x
1452 nearbyintl NEW: ISO C 9x
1453 netname2host NEW: Secure RPC
1454 netname2user NEW: Secure RPC
1455 nexttoward NEW: ISO C 9x
1456 nexttowardf NEW: ISO C 9x
1457 nexttowardl NEW: ISO C 9x
1458 nftw NEW: Unix98
1459 nftw64 NEW: LFS
1460 open64 NEW: LFS
1461 passwd2des NEW: Secure RPC
1462 pow10 NEW: GNU ext.
1463 pow10f NEW: GNU ext.
1464 pow10l NEW: GNU ext.
1465 pread NEW: Unix98
1466 pread64 NEW: LFS
1467 printf_size NEW: GNU ext.
1468 printf_size_info NEW: GNU ext.
1469 profil_counter REMOVED
1470 pthread_mutexattr_getkind_np REPLACED
1471 pthread_mutexattr_setkind_np REPLACED
1472 ptsname NEW: Unix98 PTY
1473 ptsname_r NEW: Unix98 PTY
1474 putc_locked REMOVED
1475 putchar_locked REMOVED
1476 putgrent NEW: GNU ext.
1477 putmsg NEW: STREAMS
1478 putpmsg NEW: STREAMS
1479 pututxline NEW: Unix98
1480 pwrite NEW: Unix98
1481 pwrite64 NEW: LFS
1482 readdir64 NEW: LFS
1483 readdir64_r NEW: LFS
1484 remquo NEW: ISO C 9x
1485 remquof NEW: ISO C 9x
1486 remquol NEW: ISO C 9x
1487 round NEW: ISO C 9x
1488 roundf NEW: ISO C 9x
1489 roundl NEW: ISO C 9x
1490 rtime NEW: GNU ext.
1491 scalbln NEW: ISO C 9x
1492 scalblnf NEW: ISO C 9x
1493 scalblnl NEW: ISO C 9x
1494 scandir64 NEW: LFS
1495 sendfile NEW: kernel
1496 setcontext NEW: Unix98
1497 setrlimit64 NEW: LFS
1498 setutxent NEW: Unix98
1499 sighold NEW: Unix98
1500 sigignore NEW: Unix98
1501 sigqueue NEW: POSIX.1b
1502 sigrelse NEW: Unix98
1503 sigset NEW: POSIX.1b
1504 sigtimedwait NEW: POSIX.1b
1505 sigwaitinfo NEW: POSIX.1b
1506 sincos NEW: GNU ext.
1507 sincosf NEW: GNU ext.
1508 sincosl NEW: GNU ext.
1509 statfs64 NEW: LFS
1510 statvfs NEW: Unix98
1511 statvfs64 NEW: LFS
1512 strcasestr NEW: GNU ext.
1513 strtoimax NEW: ISO C 9x
1514 strtoumax NEW: ISO C 9x
1515 strverscmp NEW: GNU ext.
1516 svcauthdes_stats NEW: Secure RPC
1517 svcunix_create NEW: sunrpc etx
1518 svcunixfd_create NEW: sunrpc ext
1519 swapcontext NEW: Unix98
1520 tcgetsid NEW: Unix98 PTY
1521 tdestroy NEW: GNU ext.
1522 tgamma NEW: ISO C 9x
1523 tgammaf NEW: ISO C 9x
1524 tgammal NEW: ISO C 9x
1525 tmpfile64 NEW: LFS
1526 trunc NEW: ISO C 9x
1527 truncate64 NEW: LFS
1528 truncf NEW: ISO C 9x
1529 truncl NEW: ISO C 9x
1530 umount2 NEW: kernel
1531 unlockpt NEW: Unix98 PTY
1532 updwtmpx NEW: Unix98
1533 user2netname NEW: Secure RPC
1534 utmpxname NEW: Unix98
1535 versionsort NEW: GNU ext.
1536 versionsort64 NEW: GNU ext.
1537 waitid NEW: Unix98
1538 wcscasecmp NEW: GNU ext.
1539 wcsncasecmp NEW: GNU ext.
1540 wcsnlen NEW: GNU ext.
1541 wcstoimax NEW: ISO C 9x
1542 wcstoll NEW: ISO C 9x
1543 wcstoull NEW: ISO C 9x
1544 wcstoumax NEW: ISO C 9x
1545 wcswcs NEW: Unix98
1546 wordexp NEW: POSIX.2
1547 wordfree NEW: POSIX.2
1548 write_profiling REMOVED
1549 xdecrypt NEW: Secure RPC
1550 xdr_authdes_cred NEW: Secure RPC
1551 xdr_authdes_verf NEW: Secure RPC
1552 xdr_cryptkeyarg NEW: Secure RPC
1553 xdr_cryptkeyarg2 NEW: Secure RPC
1554 xdr_cryptkeyres NEW: Secure RPC
1555 xdr_getcredres NEW: Secure RPC
1556 xdr_key_netstarg NEW: Secure RPC
1557 xdr_key_netstres NEW: Secure RPC
1558 xdr_keybuf NEW: Secure RPC
1559 xdr_keystatus NEW: Secure RPC
1560 xdr_netnamestr NEW: Secure RPC
1561 xdr_sizeof NEW: Secure RPC
1562 xdr_unixcred NEW: sunrpc ext
1563 xencrypt NEW: Secure RPC
1564 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1565 \f
1566 Version 2.0.6
1568 * more bug fixes
1570 \f
1571 Version 2.0.5
1573 * more bug fixes
1575 * inet_ntoa is thread-safe
1577 * updwtmp is moved from libutil to libc
1579 * rewrite of cbrt function
1581 * update of timezone data
1582 \f
1583 Version 2.0.4
1585 * more bug fixes
1586 \f
1587 Version 2.0.3
1589 * more bug fixes
1590 \f
1591 Version 2.0.2
1593 * more bug fixes
1595 * add atoll function
1597 * fix complex problems in Berkeley DB code
1599 * fix math functions
1600 \f
1601 Version 2.0.1
1603 * fixed lots of header problems (especially Linux/GNU specific)
1605 * dynamic loader preserves all registers
1607 * Roland McGrath provided support for handling of auxiliary objects in
1608 the ELF dynamic loader.
1610 * support for parallel builds is improved
1611 \f
1612 Version 2.0
1614 * GNU extensions are no longer declared by default. To enable them you
1615 must define the macro `_GNU_SOURCE' in your program or compile with
1616 `-D_GNU_SOURCE'.
1618 * The library has changed from using GNU ld symbol aliases to using weak
1619 symbols where available. The ELF object file format supports weak
1620 symbols; GNU ld also supports weak symbols in the a.out format. (There
1621 is also now support for other GNU ld extensions in ELF. Use the
1622 `--with-elf' option to configure to indicate you have ELF, and
1623 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1624 of many files which contained only symbol aliases, reducing the size of
1625 the source and the compiled library; many other files were renamed to
1626 less cryptic names previously occupied by the symbol alias files.
1627 There is a new header file <elf.h> for programs which operate on
1628 files in the ELF format.
1630 * Converted to Autoconf version 2, so `configure' has more options.
1631 Run `configure --help' to see the details.
1633 * The library can now be configured to build profiling, highly-optimized
1634 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1635 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1636 `configure' enable building these extra libraries. The shared library is
1637 built by default when using both ELF and GNU ld. When shared libraries
1638 are enabled, the new library `-ldl' is available for arbitrary run-time
1639 loading of shared objects; its interface is defined in <dlfcn.h>. The
1640 new header file <link.h> gives access to the internals of the run-time
1641 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1642 application of same name on other systems and it provides information
1643 about dynamically linked binaries.
1645 * The C library now provides the run-time support code for profiling
1646 executables compiled with `-pg'. Programs can control the profiling code
1647 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1648 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1649 the support for this file format was contributed by David Mosberger-Tang.
1651 * The math code has been replaced with a math library based on fdlibm from
1652 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1653 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1654 functions. The math functions now reside in a separate library, so
1655 programs using them will need to use `-lm' their linking commands.
1657 * John C. Bowman contributed optimized ix87 assembler inline functions.
1659 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1660 mechanism similar to that found in Solaris 2. This is now used for the
1661 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1662 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1663 file controls what services are used for each individual database. This
1664 works by loading shared libraries with names specified in `nsswitch.conf',
1665 so service modules can be changed or added at any time without even
1666 relinking any program. Currently there are the file, db, and NIS based
1667 NSS services available.
1669 * The new functions `strtoq' and `strtouq' parse integer values from
1670 strings, like `strtol' and `strtoul', but they return `long long int' and
1671 `unsigned long long int' values, respectively (64-bit quantities).
1673 * The new functions `strtof' and `strtold' parse floating-point values from
1674 strings, like `strtod', but they return `float' and `long double' values,
1675 respectively (on some machines `double' and `long double' are the same).
1677 * Ulrich Drepper has contributed new implementations of the floating-point
1678 printing and reading code used in the `printf' family of functions and
1679 `strtod', `strtof', and `strtold'. These new functions are perfectly
1680 accurate, and much faster than the old ones.
1682 * The implementation of the POSIX locale model was completely rewritten by
1683 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1684 to compile the POSIX locale definition.
1686 * The former dummy implementations of the strcoll and strxfrm function are
1687 now replaced by fully functional code contributed by Ulrich Drepper. The
1688 collation information comes from the POSIX locale definitions.
1690 * The new header <langinfo.h> defines an interface for accessing
1691 various locale-dependent data (using the locale chosen with `setlocale').
1693 * Ulrich Drepper has contributed a new suite of functions for operation on
1694 wide-character and multibyte-character strings, in <wchar.h>;
1695 and classification and case conversion of wide characters, in <wctype.h>.
1696 These new functions are conforming to the ISO C, Amendement 1 specification.
1698 * There is now a second implementation of the standard I/O library available.
1699 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1700 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1702 * You can now use positional parameter specifications in format strings
1703 for the `printf' and `scanf' families of functions. For example,
1704 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1705 ``Number 6, Mr Jones''. This is mainly useful when providing different
1706 format strings for different languages, whose grammars may dictate
1707 different orderings of the values being printed. To support this
1708 feature, the interface for `register_printf_handler' has changed; see
1709 the header file <printf.h> for details.
1711 * The `printf' and `scanf' families of functions now understand a new
1712 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1713 to group numbers as indicated by the locale; for `scanf' and friends, this
1714 says to accept as valid only a number with all the proper grouping
1715 separators in the right places. In the default "C" locale, numbers are
1716 not grouped; but locales for specific countries will define the usual
1717 conventions (i.e. separate thousands with `,' in the US locale).
1719 * The pgrp functions have been regularized, slightly incompatibly but much
1720 less confusingly. The core functions are now `getpgid' and `setpgid',
1721 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1722 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1723 provided for compatibility. There is no longer an incompatible `getpgrp'
1724 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1726 * The new header file <fts.h> and suite of functions simplify programs that
1727 operate on directory trees. This code comes from 4.4 BSD.
1729 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1730 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1731 NSS scheme used in glibc.
1733 * There is a new malloc debugging hook `__memalign_hook'.
1735 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1736 `unsigned int' in <sys/types.h>. These are for compatibility only and
1737 their use is discouraged.
1739 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1740 done differently, so that it works even without GNU ld.
1742 * New function `euidaccess' checks allowed access to a file like `access',
1743 but using the effective IDs instead of the real IDs.
1745 * The time zone data files have been updated for the latest and greatest
1746 local time conventions of the countries of the world.
1748 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1749 see <dirent.h>.
1751 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1752 for formatting floating-point numbers. They are provided only for
1753 compatibility; new programs should use `sprintf' instead. There are
1754 also equivalent function for the `long double' floating-point type and
1755 all functions also exist in a reentrant form.
1757 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1758 functions for maintaining the login-record files (primarily of use to
1759 system programs such as `login'), and convenient functions for
1760 allocating and initializing a pseudo-terminal (pty) device.
1762 * Ulrich Drepper has contributed new support for System V style
1763 shared memory and IPC on systems that support it.
1765 * Ulrich Drepper has contributed several miscellaneous new functions found
1766 in System V: The `hsearch' family of functions provide an effective
1767 implementation of hash tables; `a64l' and `l64a' provide a very simple
1768 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1769 number generator.
1771 * Ulrich Drepper has contributed new reentrant counterparts for the
1772 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1774 * Ulrich Drepper has contributed new, highly-optimized versions of several
1775 string functions for the i486/Pentium family of processors.
1777 * Ulrich Drepper has updated the Linux-specific code, based largely
1778 on work done in Hongjiu Lu's version of GNU libc for Linux.
1779 The GNU library now supports Linux versions 2.0.10 and later,
1780 using the ELF object file format (i[3456]86-*-linux).
1782 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1784 * David Mosberger-Tang and Richard Henderson have ported the C library
1785 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1786 dynamic linking support for ELF/Alpha.
1788 * Richard Henderson contributed several Alpha optimized assembler function
1789 for arithmetic and string handling.
1791 * Ulrich Drepper has contributed a new set of message catalog functions to
1792 support multiple languages using the <libintl.h> interface, for use with
1793 his new package GNU gettext. Translation volunteers have contributed
1794 catalogs of the library's messages in Spanish, German, and Korean.
1796 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1797 program and the `catgets' function for reading the catalog files it
1798 creates. (The <libintl.h> interface is preferred; we include the
1799 <nl_types.h> interface using `catgets' only for source compatibility with
1800 programs already written to use it.)
1802 * New header file <values.h> gives SVID-compatible names for <limits.h>
1803 constants.
1805 * Various new macros, declarations, and small header files for compatibility
1806 with 4.4 BSD.
1808 * New function `group_member' is a convenient way to check if a process has
1809 a given effective group ID.
1811 * When using GCC 2.7 and later, the socket functions are now declared in a
1812 special way so that passing an argument of type `struct sockaddr_in *',
1813 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1814 `struct sockaddr *' type, does not generate a type-clash warning.
1816 * New function `error' declared in header file <error.h> is a convenient
1817 function for printing error messages and optionally exiting; this is the
1818 canonical function used in GNU programs. The new functions `err', `warn',
1819 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1820 doing the same thing.
1822 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1823 POSIX.2 `glob' function to do ~ and {...} expansion.
1825 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1826 `clearenv' which is used in POSIX.9 is also available.
1828 * New function `getsid' returns session ID number on systems that support it.
1830 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1831 files <db.h> and <mpool.h> provide a rich set of functions for several
1832 types of simple databases stored in memory and in files, and <ndbm.h> is
1833 an old `ndbm'-compatible interface using the `db' functions. Link with
1834 `-ldb' to get these functions.
1836 * New macro `strdupa' copies a string like `strdup', but uses local stack
1837 space from `alloca' instead of dynamic heap space from `malloc'.
1839 * New function `strnlen' is like `strlen' but searches only a given maximum
1840 number of characters for the null terminator. `stpncpy', `strndup' and
1841 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1842 function.
1844 * New function `statfs' in header <sys/statfs.h>.
1846 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1847 provide convenient functions for operating on blocks of null-terminated
1848 strings.
1850 * A new suite of functions in <utmp.h> handle all the details of reading
1851 and writing the utmp file.
1853 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1854 Thorsten Kukuk.
1856 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1857 completely POSIX compliant and also implemented the extended functionality
1858 to handle alternate digit representation and alternate era date formats.
1860 * Ulrich Drepper provided an implementation of the `strptime' function
1861 defined in XPG4.2 which transforms a string into a `struct tm' value.
1863 * Paul Eggert provided the tzselect shell script as part of the timezone
1864 code. The shell script makes it easy to select the correct timezone
1865 specification.
1867 * The implementation of the malloc family of functions is completely replaced
1868 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1869 The implementation uses the mmap function (if available) and it is
1870 optimized for the use in multi threaded programs.
1872 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1873 functions. This new functionality is usable by specifying a special
1874 salt string and it is compatible with implementation on *BSD systems.
1876 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1877 `getsubopt' to handle second level command line options, `bsd_signal'
1878 to access BSD style `signal' functionality, the obsolete `regexp' style
1879 expression matcher.
1881 * the `lchown' function is available on system which support this
1882 functionality.
1884 * The implementation of the shadow password handling function was contributed
1885 by Ulrich Drepper.
1887 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1889 * POSIX.1g support was added. The <sys/select.h> header is available,
1890 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1891 implementation of `getaddrinfo'.
1892 \f
1893 Version 1.09
1895 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1897 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1898 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1900 * The new function `daemon' from 4.4 BSD is useful for server programs that
1901 want to put themselves in the background.
1903 * Joel Sherrill has contributed support for several standalone boards that
1904 run without an operating system.
1906 * `printf', `scanf' and friends now accept a `q' type modifier for long
1907 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1909 * All of the code taken from BSD (notably most of the math and networking
1910 routines) has been updated from the BSD 4.4-Lite release.
1912 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1914 * The new functions `getdomainname' and `setdomainname' fetch or change the
1915 YP/NIS domain name. These are system calls which exist on systems which
1916 have YP (aka NIS).
1918 * The time zone data files have been updated for the latest international
1919 conventions.
1921 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1922 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1923 \f
1924 Version 1.08
1926 * The C library now includes support for Sun RPC, from Sun's free
1927 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1928 are included. (There is still no support for YP.)
1930 * Tom Quinn has contributed a port of the C library to SGI machines running
1931 Irix 4 (mips-sgi-irix4).
1933 * The new `lockf' function is a simplified interface to the locking
1934 facilities of `fcntl', included for compatibility.
1936 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1938 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1940 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1941 compatibility.
1943 * The error message printed by `assert' for a failed assertion now includes
1944 the name of the program (if using GNU ld) and the name of the calling
1945 function (with versions of GCC that support this).
1947 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1949 * The library now includes the <sys/mman.h> header file and memory
1950 management functions `mmap', `munmap', `mprotect', `msync', and
1951 `madvise', on systems that support those facilities.
1953 * The interface for `mcheck' has changed slightly: the function called to
1954 abort the program when an allocation inconsistency is detected now takes
1955 an argument that indicates the type of failure. The new function
1956 `mprobe' lets you request a consistency check for a particular block at
1957 any time (checks are normally done only when you call `free' or `realloc'
1958 on a block).
1960 * It is now possible to easily cross-compile the C library, building on one
1961 system a library to run on another machine and/or operating system. All
1962 you need to do is set the variable `HOST_CC' in `configparms' to the
1963 native compiler for programs to run on the machine you are building on (a
1964 few generator programs are used on Unix systems); set `CC' to the
1965 cross-compiler.
1967 * The new function `fexecve' (only implemented on the GNU system) executes
1968 a program file given a file descriptor already open on the file.
1969 \f
1970 Version 1.07
1972 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1973 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1975 * You can set the variable `libprefix' in `configparms' to specify a prefix
1976 to be prepended to installed library files; this makes it easy to install
1977 the GNU C library to be linked as `-lgnuc' or whatever.
1979 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1980 copies a limited number of characters from a string, and returns the
1981 address of the last character written.
1983 * You no longer need to check for whether the installed `stddef.h' is
1984 compatible with the GNU C library. configure now checks for you.
1986 * You can now define a per-stream `fileno' function to convert the
1987 stream's cookie into an integral file descriptor.
1989 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1990 allocates zero bytes of storage, and returns a unique pointer which
1991 you can pass to `realloc' or `free'. The behavior is undefined if
1992 you dereference this pointer.
1994 * The C library now runs on Sony NEWS m68k machines running either
1995 NewsOS 3 or NewsOS 4.
1997 * The new `syscall' function is a system-dependent primitive function
1998 for invoking system calls. It has the canonical behavior on Unix
1999 systems, including unreliable return values for some calls (such as
2000 `pipe', `fork' and `getppid').
2002 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2003 to `EAGAIN', which is the preferred name. On systems whose kernels
2004 use two distinct codes, the C library now translates EWOULDBLOCK to
2005 EAGAIN in every system call function.
2006 \f
2007 Version 1.06
2009 * The GNU C Library Reference Manual is now distributed with the library.
2010 `make dvi' will produce a DVI file of the printed manual.
2011 `make info' will produce Info files that you can read on line using C-h i
2012 in Emacs or the `info' program.
2013 Please send comments on the manual to bug-glibc-manual@gnu.org.
2015 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2017 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2019 * Jason Merrill has contributed a port to the Sequent Symmetry running
2020 Dynix version 3 (i386-sequent-dynix).
2022 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2023 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2025 * New function `memory_warnings' lets you arrange to get warnings when
2026 malloc is running out of memory to allocate, like Emacs gives you.
2028 * The C library now contains the relocating allocator used in Emacs 19 for
2029 its editing buffers. This allocator (ralloc) minimizes allocation
2030 overhead and fragmentation by moving allocated regions around whenever it
2031 needs to. You always refer to a ralloc'd region with a "handle" (a
2032 pointer to a pointer--an object of type `void **').
2034 * There is a new `printf' format: `%m' gives you the string corresponding
2035 to the error code in `errno'.
2037 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2038 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2039 pass, the `a' modifier says to fill in a `char **' you pass with a
2040 malloc'd string.
2042 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2043 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2044 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2046 * `mkstemp' is a traditional Unix function to atomically create and open a
2047 uniquely-named temporary file.
2048 \f
2049 Version 1.05
2051 * The standard location for the file that says what the local timezone is
2052 has changed again. It is now `/usr/local/etc/localtime' (or more
2053 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2055 * The distribution no longer contains any files with names longer than 14
2056 characters.
2058 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2059 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2061 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2062 \f
2063 Version 1.04
2065 * The configuration process has changed quite a bit. The `configure'
2066 script is now used just like the configuration scripts for other GNU
2067 packages. The `sysdeps' directory hierarchy is much rearranged.
2068 The file `INSTALL' explains the new scheme in detail.
2070 * The header files no longer need to be processed into ANSI C and
2071 traditional C versions. There is just one set of files to install, and
2072 it will work with ANSI or old C compilers (including `gcc -traditional').
2074 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2075 MIPS DECStation running Ultrix 4.
2077 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2078 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2079 made itself into a shared library.
2081 * Yet further improved support for the i386, running 4.3 BSD-like systems
2082 (such as Mach 3 with the Unix single-server), or System V.
2084 * New function `strncasecmp' to do case-insensitive string comparison
2085 with limited length.
2087 * New function `strsep' is a reentrant alternative to `strtok'.
2089 * New functions `scandir' and `alphasort' for searching directories.
2091 * New function `setenv' is a better interface to `putenv'.
2093 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2094 function for traversing a directory tree.
2096 * The GNU obstack package is now also part of the C library.
2097 The new function `open_obstack_stream' creates a stdio stream that
2098 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2099 formatted output directly to an obstack.
2101 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2102 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2104 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2106 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2107 things to your strings.
2109 * There are some new test programs: test-fseek, testmb, and testrand.
2111 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2112 These ports are not finished, but are a good starting place for really
2113 supporting those systems.
2115 * `/etc/localtime' is now the standard location for the file that says what
2116 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2117 This follows the general principle that `/etc' is the place for all local
2118 configuration files.
2120 * The C library header files now use `extern "C"' when used by the C++
2121 compiler, so the C library should now work with C++ code.
2123 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2124 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2125 in <strings.h>.)
2127 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2128 function which uses the `merge sort' algorithm, and is said to be
2129 significantly faster than the old GNU `qsort' function. Merge sort is
2130 now the standard `qsort' function. The new algorithm can require a lot
2131 of temporary storage; so, the old sorting function is called when the
2132 required storage is not available.
2134 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2135 provides the Unix `crypt' function, plus some other entry points.
2137 * The code and header files taken from 4.4 BSD have been updated with the
2138 latest files released from Berkeley.
2139 \f
2140 ----------------------------------------------------------------------
2141 Copyright information:
2143 Copyright (C) 1992-2012 Free Software Foundation, Inc.
2145 Permission is granted to anyone to make or distribute verbatim copies
2146 of this document as received, in any medium, provided that the
2147 copyright notice and this permission notice are preserved,
2148 thus giving the recipient permission to redistribute in turn.
2150 Permission is granted to distribute modified versions
2151 of this document, or of portions of it,
2152 under the above conditions, provided also that they
2153 carry prominent notices stating who last changed them.
2154 \f
2155 Local variables:
2156 version-control: never
2157 fill-column: 76
2158 End: