1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 2542, 2543, 2558, 2898, 4404, 6803, 14341, 14912, 15367, 15384, 15786,
13 15918, 16141, 16296, 16347, 16415, 16517, 16519, 16520, 16521, 16620,
14 16734, 16973, 16985, 17118, 17243, 17244, 17250, 17441, 17787, 17886,
15 17887, 17905, 18084, 18086, 18240, 18265, 18370, 18421, 18480, 18525,
16 18595, 18610, 18618, 18647, 18661, 18674, 18675, 18681, 18757, 18778,
17 18781, 18787, 18789, 18790, 18795, 18796, 18803, 18820, 18823, 18824,
18 18825, 18857, 18863, 18870, 18872, 18873, 18875, 18887, 18921, 18951,
19 18952, 18956, 18961, 18966, 18967, 18969, 18970, 18977, 18980, 18981,
20 18985, 19003, 19016, 19032, 19046.
22 * The obsolete header <regexp.h> has been removed. Programs that require
23 this header must be updated to use <regex.h> instead.
25 * Optimized string, wcsmbs and memory functions for IBM z13.
26 Implemented by Stefan Liebler.
30 * The following bugs are resolved with this release:
32 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
33 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
34 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
35 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
36 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
37 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
38 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
39 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
40 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
41 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
42 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
43 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
44 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
45 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
46 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
47 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
48 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
49 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
50 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
51 18657, 18676, 18694, 18696, 18887.
53 * Cache information can be queried via sysconf() function on s390 e.g. with
54 _SC_LEVEL1_ICACHE_SIZE as argument.
56 * A buffer overflow in gethostbyname_r and related functions performing DNS
57 requests has been fixed. If the NSS functions were called with a
58 misaligned buffer, the buffer length change due to pointer alignment was
59 not taken into account. This could result in application crashes or,
60 potentially arbitrary code execution, using crafted, but syntactically
61 valid DNS responses. (CVE-2015-1781)
63 * The time zone file parser has been made more robust against crafted time
64 zone files, avoiding heap buffer overflows related to the processing of
65 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
66 large time zone data files. Overly long time zone specifiers in the TZ
67 variable no longer result in stack overflows and crashes.
69 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
70 for LD and GD on x86 and x86-64, has been implemented. You will need
71 binutils-2.24 or later to enable this optimization.
73 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
74 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
75 Hat). These updates cause user visible changes, such as the fix for bug
78 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
79 and getXXbyYY NSS calls for the same database, causing a denial-of-service
80 condition in some applications.
82 * Added vector math library named libmvec with the following vectorized x86_64
83 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
85 The library can be disabled with --disable-mathvec. Use of the functions is
86 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
87 Shared library libmvec.so is linked in as needed when using -lm (no need to
88 specify -lmvec explicitly for not static builds).
89 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
91 * A new fmemopen implementation has been added with the goal of POSIX
92 compliance. The new implementation fixes the following long-standing
93 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
94 old implementation is still present for use be by existing binaries.
96 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
97 releases. It has been fixed to match 2.19 and older, but binaries built
98 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
100 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
101 Contributed by Roland McGrath (Google).
103 * The header <regexp.h> is deprecated, and will be removed in a future
104 release. Use of this header will trigger a deprecation warning.
105 Application developers should update their code to use <regex.h> instead.
107 This header was formerly part of SUS, but was deprecated in 1994 and
108 removed from the standard in 2001. Also, the glibc implementation
109 leaks memory. See BZ#18681 for more details.
113 * The following bugs are resolved with this release:
115 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
116 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
117 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
118 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
119 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
120 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
121 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
122 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
123 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
124 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
127 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
128 too little memory for the to-be-scanned arguments and overflow the
129 allocated buffer. The implementation now correctly computes the required
130 buffer size when using malloc, and switches to malloc from alloca as
133 * A new semaphore algorithm has been implemented in generic C code for all
134 machines. Previous custom assembly implementations of semaphore were
135 difficult to reason about or ensure that they were safe. The new version
136 of semaphore supports machines with 64-bit or 32-bit atomic operations.
137 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
138 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
140 * Port to Altera Nios II has been contributed by Mentor Graphics.
142 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
143 implementations for powerpc64/powerpc64le.
144 Implemented by Adhemerval Zanella (IBM).
146 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
147 and powerpc64le. This may improve lock scaling of existing programs on
148 HTM capable systems. The lock elision code is only enabled with
149 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
150 powerpc will issue a transaction abort on every syscall to avoid side
151 effects being visible outside transactions.
153 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
154 AArch64. Contributed by ARM Ltd.
156 * i386 memcpy functions optimized with SSE2 unaligned load/store.
158 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
159 under certain input conditions resulting in the execution of a shell for
160 command substitution when the application did not request it. The
161 implementation now checks WRDE_NOCMD immediately before executing the
162 shell and returns the error WRDE_CMDSUB as expected.
164 * CVE-2012-3406 printf-style functions could run into a stack overflow when
165 processing format strings with a large number of format specifiers.
167 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
168 infinite loop if the DNS response contained a PTR record of an unexpected
171 * The minimum GCC version that can be used to build this version of the GNU
172 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
173 still be used to compile programs using the GNU C Library.
175 * The GNU C Library is now built with -Werror by default. This can be
176 disabled by configuring with --disable-werror.
178 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
180 * The obsolete sigvec function has been removed. This was the original
181 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
182 programs have been using instead for about 25 years. Of course, ABI
183 compatibility for old binaries using sigvec remains intact.
185 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
186 with newer versions of bison.
188 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
189 The original MIPS o32 hard-float ABI requires an FPU where double-precision
190 registers overlay two consecutive single-precision registers. MIPS32R2
191 introduced a new FPU mode (FR=1) where double-precision registers extend the
192 corresponding single-precision registers which is incompatible with the
193 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
194 require the use of FR=1 making a transition necessary. New o32 ABI
195 extensions enable users to migrate over time from the original o32 ABI
196 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
197 tracks the ABI of any loaded object and verifies that new objects are
198 compatible. Mode transitions will also be requested as required and
199 unsupportable objects will be rejected. The ABI checks include both soft and
200 hard float ABIs for o32, n32 and n64.
202 GCC 5 with GNU binutils 2.25 onwards:
203 It is strongly recommended that all o32 system libraries are built using the
204 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
205 with the original and all new o32 ABI extensions. Configure a MIPS GCC
206 compiler using --with-fp-32=xx to set this by default.
210 * The following bugs are resolved with this release:
212 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
213 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
214 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
215 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
216 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
217 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
218 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
219 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
220 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
221 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
222 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
223 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
224 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
225 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
226 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
228 * Reverted change of ABI data structures for s390 and s390x:
229 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
230 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
231 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
232 are preserved pointing straight to the same implementation as the old ones.
233 Given that, new callers will simply provide a too-big buffer to these
234 functions. Any applications/libraries out there that embed jmp_buf or
235 ucontext_t in an ABI-relevant data structure that have already been rebuilt
236 against 2.19 headers will have to rebuilt again. This is necessary in any
237 case to revert the breakage in their ABI caused by the glibc change.
239 * Support for file description locks is added to systems running the
240 Linux kernel. The standard file locking interfaces are extended to
241 operate on file descriptions, not file descriptors, via the use of
242 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
243 are associated with an open file instead of a process.
245 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
247 * The minimum Linux kernel version that this version of the GNU C Library
248 can be used with is 2.6.32.
250 * Running the testsuite no longer terminates as soon as a test fails.
251 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
252 with PASS or FAIL lines for individual tests. A summary of the results is
253 printed, including a list of failing lists, and "make check" exits with
254 error status if there were any unexpected failures. "make check
255 stop-on-test-failure=y" may be used to keep the old behavior.
257 * The am33 port, which had not worked for several years, has been removed
260 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
261 supported; they now act the same as _DEFAULT_SOURCE (but generate a
262 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
263 conflicted with POSIX (support for which was removed in 2.19), the
264 interfaces those macros enabled remain available when compiling with
265 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
268 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
270 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
271 This may improve lock scaling of existing programs on TX capable systems.
272 The lock elision code is only built with --enable-lock-elision=yes and
273 then requires a GCC version supporting the TX builtins. With lock elision
274 default mutexes are elided via __builtin_tbegin, if the cpu supports
275 transactions. By default lock elision is not enabled and the elision code
278 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
279 copy the path argument. This allowed programs to cause posix_spawn to
280 deference a dangling pointer, or use an unexpected pathname argument if
281 the string was modified after the posix_spawn_file_actions_addopen
284 * All supported architectures now use the main glibc sysdeps directory
285 instead of some being in a separate "ports" directory (which was
286 distributed separately before glibc 2.17).
288 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
289 On configurations that support it (all Linux configurations), it's now
290 used regardless of the --enable-add-ons switch to configure. It is no
291 longer possible to build such configurations without pthreads support.
293 * Locale names, including those obtained from environment variables (LANG
294 and the LC_* variables), are more tightly checked for proper syntax.
295 setlocale will now fail (with EINVAL) for locale names that are overly
296 long, contain slashes without starting with a slash, or contain ".." path
297 components. (CVE-2014-0475) Previously, some valid locale names were
298 silently replaced with the "C" locale when running in AT_SECURE mode
299 (e.g., in a SUID program). This is no longer necessary because of the
302 * On x86-64, the dynamic linker's lazy-binding support is now compatible
303 with application code using Intel MPX instructions. (With all previous
304 versions, the MPX register state could be clobbered when making calls
305 into or out of a shared library.) Note that while the new dynamic
306 linker is compatible with all known x86 hardware whether or not it
307 supports Intel MPX, some x86 instruction-set emulators might fail to
308 handle the new instruction encodings. This is known to affect Valgrind
309 versions up through 3.9 (but will be fixed in the forthcoming 3.10
310 release), and might affect other tools that do instruction emulation.
312 * Support for loadable gconv transliteration modules has been removed.
313 The support for transliteration modules has been non-functional for
314 over a decade, and the removal is prompted by security defects. The
315 normal gconv conversion modules are still supported. Transliteration
316 with //TRANSLIT is still possible, and the //IGNORE specifier
317 continues to be supported. (CVE-2014-5119)
319 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
320 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
321 resulting a denial-of-service security vulnerability in applications which
322 use functions related to iconv. (CVE-2014-6040)
326 * The following bugs are resolved with this release:
328 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
329 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
330 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
331 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
332 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
333 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
334 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
335 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
336 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
337 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
338 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
339 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
340 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
341 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
342 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
343 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
344 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
345 16431, 16453, 16474, 16506, 16510, 16529
347 * Slovenian translations for glibc messages have been contributed by the
348 Translation Project's Slovenian team of translators.
350 * The public headers no longer use __unused nor __block. This change is to
351 support compiling programs that are derived from BSD sources and use
352 __unused internally, and to support compiling with Clang's -fblock
353 extension which uses __block.
355 * CVE-2012-4412 The strcoll implementation caches indices and rules for
356 large collation sequences to optimize multiple passes. This cache
357 computation may overflow for large collation sequences and may cause a
358 stack or buffer overflow. This is now fixed to use a slower algorithm
359 which does not use a cache if there is an integer overflow.
361 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
362 rules for large collation sequences to optimize multiple passes and falls
363 back to alloca if malloc fails, resulting in a possible stack overflow.
364 The implementation now falls back to an uncached collation sequence lookup
367 * CVE-2013-4788 The pointer guard used for pointer mangling was not
368 initialized for static applications resulting in the security feature
369 being disabled. The pointer guard is now correctly initialized to a
370 random value for static applications. Existing static applications need
371 to be recompiled to take advantage of the fix (bug 15754).
373 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
374 to the d_name member of struct dirent, or omit the terminating NUL
375 character. (Bugzilla #14699).
377 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
378 aligned_alloc functions could allocate too few bytes or corrupt the
379 heap when passed very large allocation size values (Bugzilla #15855,
382 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
383 for AF_INET6 has been fixed (Bugzilla #16072).
385 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
386 pap_CW, quz_PE, the_NP.
388 * Substantially revised locales: gd_GB, ht_HT
390 * The LC_ADDRESS field was updated to support country_car for almost all
393 * ISO 1427 definitions were updated.
395 * ISO 3166 definitions were updated.
397 * The localedef utility now supports --big-endian and --little-endian
398 command-line options to generate locales for a different system from that
399 for which the C library was built.
401 * Binary locale files now only depend on the endianness of the system for
402 which they are generated and not on other properties of that system. As a
403 consequence, binary files generated with new localedef may be incompatible
404 with old versions of the GNU C Library, and binary files generated with
405 old localedef may be incompatible with this version of the GNU C Library,
406 in the following circumstances:
408 + Locale files may be incompatible on m68k systems.
410 + Locale archive files (but not separate files for individual locales) may
411 be incompatible on systems where plain "char" is signed.
413 * The configure option --disable-versioning has been removed. Builds with
414 --disable-versioning had not worked for several years.
416 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
417 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
419 * SystemTap probes for malloc have been introduced.
421 * SystemTap probes for slow multiple precision fallback paths of
422 transcendental functions have been introduced.
424 * Support for powerpc64le has been added.
426 * The soft-float powerpc port now supports e500 processors.
428 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
430 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
431 set of header declarations that are enabled by default, even when other
432 feature test macros or compiler options such as -std=c99 would otherwise
433 disable some of those declarations.
435 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
436 conflict with POSIX. The libbsd-compat library (which was a dummy library
437 that did nothing) has also been removed.
439 * Preliminary documentation about Multi-Thread, Async-Signal and
440 Async-Cancel Safety has been added.
442 * Change of ABI data structures for s390 and s390x:
443 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
444 allow for future hardware extensions. All library functions that accept or
445 return these structures were versioned in order to provide backwards
446 compatibility with existing code. However, not all cases can be handled
447 with interface versioning. If an application embeds either structure into
448 another structure and that structure is passed to another compilation unit
449 which expects the newer larger-sized object then any access to the new
450 fields will result in undefined behaviour. Similarly any access to fields
451 that were moved by the enlarging of the structures will cause undefined
452 behaviour. To fix the undefined behaviour all objects that are part of the
453 final in-memory image must agree on the size of structures, and this may
454 require recompilation.
458 * The following bugs are resolved with this release:
460 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
461 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
462 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
463 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
464 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
465 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
466 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
467 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
468 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
469 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
470 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
471 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
472 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
475 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
476 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
477 Distributions can re-enable building and using pt_chown via the new configure
478 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
479 considerable security risks and should only be used if the distribution
480 understands and accepts the risks.
482 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
485 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
486 fixed (Bugzilla #15330).
488 * Add support for calling C++11 thread_local object destructors on thread
489 and program exit. This needs compiler support for offloading C++11
490 destructor calls to glibc.
492 * Improved worst case performance of libm functions with double inputs and
495 * Support for priority inherited mutexes in pthread condition variables on
496 non-x86 architectures.
498 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
500 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
502 * Optimized string functions for ARM. Implemented by Will Newton and
505 * Optimized libm functions for SPARC. Implemented by David S. Miller.
507 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
510 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
511 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
513 * Added a benchmark framework to track performance of functions in glibc.
515 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
516 It is based on draft TS 18661 and currently enabled as a GNU extension.
518 * On Linux, the clock function now uses the clock_gettime system call
519 for improved precision, rather than old times system call.
521 * Added support for version-3 tz format files. This is needed when using
522 the tz database release 2013e or later, and affects a few unusual cases --
523 currently only TZ='America/Godthab' for time stamps after 2037.
525 * Added new API functions pthread_getattr_default_np and
526 pthread_setattr_default_np to get and set the default pthread
527 attributes of a process.
529 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
530 This may improve lock scaling of existing programs on TSX capable systems.
531 When the --enable-lock-elision=yes parameter is specified at configure
532 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
535 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
536 availability). Implemented by Ryan S. Arnold.
538 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
542 * The following bugs are resolved with this release:
544 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
545 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
546 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
547 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
548 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
549 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
550 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
551 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
552 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
553 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
554 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
555 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
556 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
557 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
558 14879, 14889, 14893, 14898, 14914.
560 * Optimization of memcpy for MIPS.
562 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
563 EMFILE has been fixed (Bugzilla #14889).
565 * The add-on ports collection is now distributed in the "ports" subdirectory
566 of the main GNU C Library distribution, rather than separately.
568 * Port to ARM AArch64 contributed by Linaro.
570 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
571 Optimized versions of memcpy, memset, and memcmp added for System z10 and
573 Implemented by Andreas Krebbel.
575 * The new function secure_getenv allows secure access to the environment,
576 returning NULL if running in a SUID/SGID process. This function replaces
577 the internal function __secure_getenv.
579 * SystemTap static probes have been added into the dynamic linker.
580 Implemented by Gary Benson.
582 * Optimizations of string functions strstr, strcasestr and memmem.
583 Implemented by Maxim Kuvyrkov.
585 * The minimum Linux kernel version that this version of the GNU C Library
586 can be used with is 2.6.16.
588 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
589 powerpc POWER7. Implemented by Will Schmidt.
591 * New configure option --disable-nscd builds the C library such that it
592 never attempts to contact the Name Service Caching Daemon (nscd).
593 New configure option --disable-build-nscd avoids building nscd itself;
594 this is the default if --disable-nscd is used.
596 * Improved support for cross-compilation, including cross-testing and
597 bootstrap builds without a previously built glibc.
599 * Several testsuite tests are now able to test multiple IFUNC variants of an
600 interface, rather than just testing the one that would be chooen by
603 * New configure options --with-bugurl and --with-pkgversion, for
604 distributors to use to embed their bug-reporting and package version
605 information in --help and --version output.
607 * The ttyname and ttyname_r functions on Linux now fall back to searching for
608 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
609 allows creation of chroots without the procfs mounted on /proc.
611 * The `crypt' function now fails if passed salt bytes that violate the
612 specification for those values. On Linux, the `crypt' function will
613 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
614 enabled, and fail on encrypted strings using the MD5 or DES algorithm
615 when the mode is enabled.
617 * The `clock_*' suite of functions (declared in <time.h>) is now available
618 directly in the main C library. Previously it was necessary to link with
619 -lrt to use these functions. This change has the effect that a
620 single-threaded program that uses a function such as `clock_gettime' (and
621 is not linked with -lrt) will no longer implicitly load the pthreads
622 library at runtime and so will not suffer the overheads associated with
623 multi-thread support in other code such as the C++ runtime library.
625 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
630 * The following bugs are resolved with this release:
632 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
633 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
634 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
635 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
636 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
637 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882,
638 11174, 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959,
639 12047, 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416,
640 12495, 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530,
641 13531, 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559,
642 13563, 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637,
643 13656, 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726,
644 13738, 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787,
645 13792, 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852,
646 13854, 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886,
647 13892, 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916,
648 13917, 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927,
649 13928, 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968,
650 13970, 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034,
651 14036, 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059,
652 14064, 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122,
653 14123, 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241,
656 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
657 configuring glibc with:
658 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
659 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
660 Implemented by H.J. Lu.
664 + define static_assert
666 + do not declare gets
668 + declare at_quick_exit and quick_exit also for ISO C11
670 + aligned_alloc. NB: The code is deliberately allows the size parameter
671 to not be a multiple of the alignment. This is a moronic requirement
672 in the standard but it is only a requirement on the caller, not the
677 + uchar.h support added
679 + CMPLX, CMPLXF, CMPLXL added
681 Implemented by Ulrich Drepper.
683 * Support for the IA-64 has been moved to ports.
685 * Remove support for anything but ELF binary format
687 * Checking versions of poll, ppoll added.
688 Implemented by Ulrich Drepper.
690 * More generic and 64-bit performance optimizations to math functions.
691 Implemented by Ulrich Drepper.
693 * New configure option --enable-obsolete-rpc makes the deprecated RPC
694 headers and functions available at compile time as they were before
695 version 2.14. This option will be removed at some time in the future
696 after the TI-RPC library becomes fully sufficient for the needs of
697 existing applications.
699 * Compatibility code for Linux kernel versions before 2.4 has been removed.
700 Note that glibc is not expected to work with any Linux kernel version
703 * New header <sys/auxv.h> and function getauxval allowing easy access to
704 the AT_* key-value pairs passed from the Linux kernel. The header also
705 defines the HWCAP_* bits associated with the AT_HWCAP key.
707 * New locales: mag_IN
709 * New configure option --enable-systemtap builds SystemTap static probes
710 into libc for setjmp and longjmp and into libpthread for various operations.
711 So far the setjmp/longjmp probes and some of the libpthread probes are
712 provided only for i*86 and x86_64.
713 Implemented by Roland McGrath and Rayson Ho.
715 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
717 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
720 * More optimized functions for SPARC. Implemented by David S. Miller.
722 * Improved support for cross-compilation, especially bootstrap builds
723 without a previously built glibc.
725 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
726 Chris Metcalf from Tilera.
728 * Support for the old ARM ABI has been removed from ports. Only the EABI is
729 now supported for ARM processors.
731 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
732 as the name of the dynamic linker, to distinguish it from the
733 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
735 * Support for CRIS has been removed from ports.
737 * A new class of installed header has been documented for low-level
738 platform-specific functionality. PowerPC added the first instance with a
739 function to provide time base register access. Contributed by Tulio
740 Magno Quites Machado Filho.
742 * ix86 configurations now install header files that are consistent with
743 what x86-64 configurations install. These same header files can be used
744 for -m32, -m64, or -mx32 builds.
745 Contributed by H.J. Lu.
747 * Math library bug fixes. A thorough audit of all open math library bugs was
748 conducted by Joseph Myers. Significant progress was made on many math
749 library bugs resulting in more accurate exceptions and function results.
750 Many thanks to all those that contributed including Andreas Jaeger for his
751 patch review and work on the x87 trigonometric instruction issues.
753 * Timezone data is no longer installed. Timezone-related binaries and scripts
754 will continue to be installed. Users should obtain their timezone data from
755 their distribution provider or from the tzdata package at
756 <ftp://munnari.oz.au/pub/>.
760 * The following bugs are resolved with this release:
762 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
763 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
764 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
765 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
766 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
767 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
768 13484, 13506, 13515, 13523, 13524, 13538, 13540
770 * New program pldd to list loaded object of a process
771 Implemented by Ulrich Drepper.
773 * Add nss_db support back to glibc. No more dependency on Berkeley db
774 and support for initgroups lookups.
775 Implemented by Ulrich Drepper.
777 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
778 Contributed by HJ Lu.
780 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
781 Contributed by HJ Lu.
783 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
784 on x86-32 and x86-64.
785 Contributed by Liubov Dmitrieva.
787 * Optimized strchr and strrchr for SSE on x86-32.
788 Contributed by Liubov Dmitrieva.
790 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
791 for x86-64 and x86-32.
792 Contributed by Liubov Dmitrieva.
794 * New interfaces: scandirat, scandirat64
795 Implemented by Ulrich Drepper.
797 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
798 Implemented by Ulrich Drepper.
800 * nscd now also caches the netgroup database.
801 Implemented by Ulrich Drepper.
803 * Integrate libm with gcc's -ffinite-math-only option.
804 Implemented by Ulrich Drepper.
806 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
807 to math functions. Implemented by Ulrich Drepper.
809 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
810 Implemented by Ulrich Drepper.
812 * New Linux interfaces: process_vm_readv, process_vm_writev
814 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
815 Implemented by Ulrich Drepper.
817 * Optimized nearbyint and strcasecmp for PPC.
818 Implemented by Adhemerval Zanella.
820 * New locales: bho_IN, unm_US, es_CU, ta_LK
824 * The following bugs are resolved with this release:
826 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
827 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
828 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
829 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
830 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
831 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
832 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
833 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
834 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
835 12795, 12811, 12813, 12814, 12841
837 * The RPC implementation in libc is obsoleted. Old programs keep working
838 but new programs cannot be linked with the routines in libc anymore.
839 Programs in need of RPC functionality must be linked against TI-RPC.
840 The TI-RPC implementation is IPv6 enabled and there are other benefits.
842 Visible changes of this change include (obviously) the inability to link
843 programs using RPC functions without referencing the TI-RPC library and the
844 removal of the RPC headers from the glibc headers.
845 Implemented by Ulrich Drepper.
847 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
848 syncfs, setns, sendmmsg
850 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
851 yue_HK, lij_IT, mhr_RU
853 * New encodings: CP770, CP771, CP772, CP773, CP774
855 * New program sotruss to trace calls through PLTs
856 Implemented by Ulrich Drepper.
858 * The malloc hook implementation is marked deprecated and will be removed
859 from the default implementation in the next version. The design never
860 worked ever since the introduction of threads. Even programs which do
861 not create threads themselves can use multiple threads created internally.
865 * The following bugs are resolved with this release:
867 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
868 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
869 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
870 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
873 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
875 * POWER7 optimizations: memset, memcmp, strncmp
877 * New optimized string functions for x86-64: strnlen (SSE2),
878 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
879 Implemented by Ulrich Drepper.
883 * The following bugs are resolved with this release:
885 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
886 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
887 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
888 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
889 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
890 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
891 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
892 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
894 * New interfaces: pthread_getname_np, pthread_setname_np
896 * New Linux interface: recvmmsg
898 * STT_GNU_IFUNC implemented for Sparc by David Miller.
900 * The dynamic linker now recognizes supported ABI versions from the
901 EI_ABIVERSION field in the ELF header.
902 Implemented by Ulrich Drepper.
904 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
905 will not be used to fill in password fields in the passwd.byname replies.
906 Instead it is used to synthesize the shadow.byname table, should it be
907 missing. This is a useful mode in some installations involving Solaris.
908 Implemented by Ulrich Drepper.
910 * New locales: kok_IN, sq_MK, cv_RU
914 * The following bugs are resolved with this release:
916 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
917 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
918 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
919 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
920 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
921 10789, 10817, 10823, 10840, 10847
923 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
925 Implemented by Ulrich Drepper.
927 * Checking version of longjmp added that fails if an uninitialized stack
928 frame would be created. Implemented by Ulrich Drepper.
930 * STT_GNU_IFUNC is now supported in static executables.
931 Implemented by H.J. Lu.
933 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
935 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
936 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
937 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
938 Contributed by H.J. Lu.
940 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
941 Implemented by Ulrich Drepper.
943 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
945 Contributed by H.J. Lu.
947 * Support for fma instruction in AVX on x86-64.
948 Implemented by H.J. Lu and Ulrich Drepper.
950 * AVX support in x86-64 auditing support in ld.so.
951 Implemented by H.J. Lu.
953 * STB_GNU_UNIQUE support added.
954 Implemented by Ulrich Drepper.
956 * Implement second fallback mode for optimized DNS lookup for even more
957 broken environments. If two requests from the same port are not
958 handled correctly close the socket and open a new one before sending
959 the second request. The 'single-request-reopen' option in /etc/resolv.conf
960 can be used to select this mode right away, instead of rediscovering the
961 necessity is every process again.
962 Implemented by Ulrich Drepper.
964 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
965 Implemented by Adam Tkac.
967 * Optimized iconv conversions for S390x.
968 Implemented by Andreas Krebbel.
970 * Using condvars with PI mutexes is now more efficient due to kernel
971 support for requeueing to PI futexes. NPTL support added for x86-64.
972 Implemented by Ulrich Drepper.
974 * New locales: ps_AF, my_MM
978 * The following bugs are resolved with this release:
980 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
981 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
982 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
983 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
984 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
986 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
987 Implemented by Ulrich Drepper.
989 * New Linux interfaces: accept4, fallocate, fallocate64.
990 Implemented by Ulrich Drepper.
992 * Correct declarations of string function when used in C++ code. This
993 could lead to compile errors for invalid C++ code.
995 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
998 * New POSIX 2008 interface: psiginfo
999 Implemented by Ulrich Drepper.
1001 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1002 Implemented by Ulrich Drepper.
1004 * Support for selecting between multiple function definitions at runtime
1005 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1007 * The libcrypt library can now use the hash function implementations in
1008 NSS. Implemented by Ulrich Drepper.
1010 * The malloc implementation can be compiled to be less memory efficient
1011 but higher performing in multi-threaded programs.
1012 Implemented by Ulrich Drepper.
1014 * New locales: nan_TW@latin, ks_IN
1016 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1017 Implemented by Ulrich Drepper.
1019 * Extended printf hook support. It is possible to use user-defined types
1020 and extend existing format specifiers.
1021 Implemented by Ulrich Drepper.
1023 * Handling for group shadow files has been added.
1024 Implemented by Ulrich Drepper.
1026 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1027 servers (the case, e.g., for some people using the built-in DNS
1028 server in ADSL modems/routers). There is a once-per-process timeout
1029 in case of a broken server. To avoid it, users can run nscd or put
1030 'options single-request' in /etc/resolv.conf.
1031 Implemented by Ulrich Drepper.
1035 * The following bugs are resolved with this release:
1037 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1038 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1039 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1040 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1041 6968, 6974, 6980, 6995, 7008, 7009, 7029
1043 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1044 up at the same time. Implemented by Ulrich Drepper.
1046 * TLS descriptors for LD and GD on x86 and x86-64.
1047 Implemented by Alexandre Oliva.
1049 * getaddrinfo now handles DCCP and UDPlite.
1050 Implemented by Ulrich Drepper.
1052 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1053 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1054 Implemented by Ulrich Drepper.
1056 * New implementation of memmem, strstr, and strcasestr which is O(n).
1057 Implemented by Eric Blake.
1059 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1061 * Implement "e" option for popen to open file descriptor with the
1062 close-on-exec flag set. Implemented by Ulrich Drepper.
1064 * Implement "b" mode for fmemopen. In this mode writes writes don't
1065 implicitly add a NUL byte and seeks from the end of the buffer really
1066 use the buffer end, not the string length as the basis.
1067 Implemented by Ulrich Drepper.
1069 * Many functions, exported and internal, now atomically set the close-on-exec
1070 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1072 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1074 Implemented by Pravin Satpute.
1076 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1080 * The following bugs are resolved with this release:
1082 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1083 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1084 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1085 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1086 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1087 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1088 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1090 * New locales: bo_CN, bo_IN, shs_CA.
1092 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1094 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1095 Implemented by Pravin Satpute.
1097 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1099 * nscd caches now all timeouts for DNS entries
1100 Implemented by Ulrich Drepper.
1102 * nscd is more efficient and wakes up less often.
1103 Implemented by Ulrich Drepper.
1105 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1106 vdprintf, and obstack_vprintf.
1107 Implemented by Jakub Jelinek.
1109 * Faster memset for x86-64.
1110 Implemented by Harsha Jagasia and H.J. Lu.
1112 * Faster memcpy on x86.
1113 Implemented by Ulrich Drepper.
1115 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1116 Implemented by Ulrich Drepper.
1118 * Faster sqrt and sqrtf implemention for some PPC variants.
1119 Implemented by Steven Munroe.
1123 * The following bugs are resolved with this release:
1125 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1126 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1127 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1128 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1129 5071, 5103, 5104, 5112, 5113, 5184, 5186
1131 * More checking functions: fread, fread_unlocked, open*, mq_open.
1132 Implemented by Jakub Jelinek and Ulrich Drepper.
1134 * Extend fortification to C++. Implemented by Jakub Jelinek.
1136 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1137 by not recognizing 'a' as a modifier when those specs are requested.
1138 Implemented by Jakub Jelinek.
1140 * PPC optimizations to math and string functions.
1141 Implemented by Steven Munroe.
1143 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1144 options to be passed. Implemented by Ulrich Drepper.
1146 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1148 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1149 Implemented by Ulrich Drepper.
1151 * Handle private futexes in the NPTL implementation.
1152 Implemented by Jakub Jelinek and Ulrich Drepper.
1154 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1155 Implemented by Roland McGrath and Ulrich Drepper.
1157 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1159 * SHA-256 and SHA-512 based password encryption.
1160 Implemented by Ulrich Drepper.
1162 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1163 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1166 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1167 Implemented by Ulrich Drepper.
1171 * The following bugs are resolved with this release:
1173 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1174 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1175 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1176 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1177 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1178 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1179 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1182 * New Linux interfaces: epoll_pwait, sched_getcpu.
1184 * New generic interfaces: strerror_l.
1186 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1190 * The following bugs are resolved with this release:
1192 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1193 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1194 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1195 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1196 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1197 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1198 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1199 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1200 3225, 3251, 3252, 3253, 3273
1202 * For Linux, the sorting of addresses returned by getaddrinfo now also
1203 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1204 Implemented by Ulrich Drepper.
1206 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1207 Implemented by Ulrich Drepper.
1209 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1211 * New iconv module for MIK. Contributed by Alexander Shopov.
1213 * For sites with broken group and/or passwd database, the auto-propagate
1214 option of nscd can prevent creating ID lookup entries from the results
1215 of a name lookup and vice versa. This usually is no problem but some
1216 site might have problems with the default behavior.
1217 Implemented by Ulrich Drepper.
1219 * Iterating over entire database in NIS can be slow. With the
1220 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1221 to trade time for memory. The entire database will be read at once.
1222 Implemented by Ulrich Drepper.
1224 * The interfaces introduced in RFC 3542 have been implemented by
1227 * Support for the new ELF hash table format was added by Ulrich Drepper.
1229 * Support for priority inheritance mutexes added by Jakub Jelinek and
1232 * Support for priority protected mutexes added by Jakub Jelinek.
1234 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1235 or_IN, csb_PL, fy_NL, sr_ME.
1239 * More overflow detection functions.
1241 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1242 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1244 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1245 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1246 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1247 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1248 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1249 by Masahide Washizawa.
1251 * It is now possible to install audit libraries for the dynamic linker using
1252 LD_AUDIT. Implemented by Ulrich Drepper.
1254 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1255 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1256 For a libc and libpthread that works well on Linux 2.4 kernels, we
1257 recommend using the stable 2.3 branch.
1259 * The new function open_wmemstream acts like open_memstream,
1260 but uses a wchar_t wide character buffer.
1262 * The new function ppoll is an improved version of poll, similar to pselect.
1264 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1265 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1266 renameat, unlinkat, linkat, symlinkat, readlinkat.
1268 * New Linux kernel system calls: unshare,
1269 inotify_init, inotify_add_watch, inotify_rm_watch.
1271 * The euidaccess function is now also known by the alias eaccess,
1272 for compatibility with some other systems.
1274 * Timezone data updated to 2006b version.
1278 * The following bugs are resolved with this release:
1280 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1281 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1282 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1283 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1284 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1285 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1287 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1289 * As of this release, GCC 4 can be used to compile the C Library.
1291 * Timezone data updated to 2005m version.
1295 * The following bugs are resolved with this release:
1297 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1298 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1299 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1300 777, 787, 821, 822, 823, 825
1302 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1306 * Support for RFC 3678. Real implementations exist only for Linux so far.
1307 Implemented by Ulrich Drepper.
1309 * nscd can now cache entries persistently. Expiring entries are reloaded.
1310 For speedups the cache can be shared in memory with client processes.
1311 Implemented by Ulrich Drepper.
1313 * nscd can now perform SELinux checks.
1314 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1316 * getaddrinfo queries are now cached. Canonical name lookup is performed
1318 Implemented by Ulrich Drepper.
1320 * The nothrow function attribute is used when headers are used by gcc when
1321 compiling C code. This can avoid significant amounts of exception
1324 * The malloc functions perform more error checking and are stricter when
1325 it comes to reacting on errors. The default action is to terminate
1326 the process after showing an error message. Implemented by Ulrich Drepper.
1328 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1329 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1331 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1332 namespaces using the new function dlmopen(). This feature is of course,
1333 like most other dynamic loading functionality, not available in statically
1334 linked applications. Implemented by Ulrich Drepper.
1336 * Low-overhead boundary checking variants of string and some stdio functions
1337 were added. These are to be used in conjunction with a gcc patch by
1338 Jakub Jelinek which adds calls to these functions if possible.
1339 Implemented by Jakub Jelinek and Ulrich Drepper.
1341 * Old code for several operating systems and machine architectures that
1342 have not been in working condition in a long time have been removed from
1343 the main source tree maintained by the GNU C Library's maintainers.
1344 These files are now reside in the separate `ports' source module
1345 that is usable as an add-on when building the library.
1349 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1350 interrogate the dynamic linker, compatible with the Solaris interface.
1352 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1353 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1355 * getifaddrs now uses the netlink interface on Linux to get its information.
1356 Implemented by Thorsten Kukuk.
1358 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1359 Implemented by Ulrich Drepper.
1361 * support for non-executable stacks on x86 has been added. Changes mostly
1364 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1367 * getaddrinfo now performs destination address selection according to
1372 * Thread-safe interfaces for many functions that access locale data
1373 were added in version 2.3, but these features were omitted from NEWS.
1374 Many functions have variants with an `_l' suffix that take a `locale_t'
1375 object as a parameter rather than consulting the current locale.
1376 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1377 create and maintain `locale_t' objects. Additionally, the new function
1378 `uselocale' sets "the current locale" (as used by functions not so
1379 parameterized) set for an individual thread. These features were added
1380 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1382 * The functions getresuid, getresgid, setresuid, and setresgid, which
1383 have long been available on Linux, are now declared in <unistd.h>
1384 and are now also available on the Hurd.
1386 * ELF thread-local storage support (TLS) now works on x86-64.
1388 * The new dynamic string token $LIB is expanded in shared library names.
1389 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1391 * Aldy Hernandez contributed complete software floating point support for
1392 PowerPC machines with no FPU.
1394 * fexecve is implemented on Linux.
1396 * The `btowc' function should work at least twice as fast due to
1397 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1399 * With approriate thread add-ons cancelable functions are now implemented
1400 in libc.so as well. No need to call the function in libpthread. This
1401 change allowed to finally disable the incorrect and expensive handling
1402 of weak definition in ld.so.
1404 * Yet more PLT entries in libc.so have been removed. We finally arrived
1405 at the bare minimum. Startup times improved appropriately.
1407 * Support for the new Linux/x86 system call interface was added. The
1408 AT_SYSINFO auxiliary vector entry is recognized and handled.
1412 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1415 * iconv (the program and the interface) now accepts empty names (excluding
1416 options like //TRANSLIT) to mean "use charset of current locale".
1418 * localedef can now transliterate characters in strings which are not in
1419 the provided charmap. The information from the input locale is used.
1421 * Prelinking support was added for ELF targets. This requires additional
1422 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1424 * Read-only stdio streams now use mmap to speed up operation by eliminating
1425 copying and buffer underflows. To use add 'm' to the mode string of
1426 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1428 * The malloc functions were completely rewritten by Wolfram Gloger based
1429 on Doug Lea's malloc-2.7.0.c.
1431 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1432 implementation of regex.
1434 * Bruno Haible upgraded the iconv and locale implementation to support
1437 * Contents of the LC_* and LANG environment variables in the CEN style are
1438 not recognized anymore. It never was used. Change by Ulrich Drepper.
1440 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1441 thread-local storage (TLS) ABI on some platforms.
1442 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1444 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1445 EUC-JISX0213, and TSCII.
1447 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1448 BSD-compatible interface for getting all network interface addresses.
1449 Implementation for IPv4 by Roland McGrath.
1451 * Loading of locale data is faster due to the introduction of a locale
1452 archive. Implemented by Roland McGrath and Ulrich Drepper.
1454 * Startup times are significantly reduced by not using exported functions
1455 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1458 * Steven Munroe contributed a port to PowerPC64/Linux.
1462 * The Hurd now uses the GNU libio implementation of stdio rather than the
1463 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1465 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1466 with the same behavior as the Linux system call of the same name.
1470 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1471 128-bit long double format.
1473 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1474 IBM1161, and IBM1162 charsets.
1476 * Andreas Jaeger contributed a port to x86-64/Linux.
1478 * Peter Bruin contributed a port to PowerPC/Hurd.
1480 * libc functions using I/O streams now can handle wide-oriented streams
1483 * optimizations in the dynamic linker. Binaries created by recent binutils
1484 versions start up quicker due to reduced time spent on relocations.
1486 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1490 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1491 asinh, atanh, j0 for the 128-bit long double format.
1493 * Bruno Haible updated all the code handling Unicode in some form to
1494 support Unicode 3.1.
1496 * Speed of regex for single-byte locales is back to previous levels.
1497 Patch by Isamu Hasegawa.
1499 * Alpha, SPARC, and IA-64 now also using floating stacks.
1501 * Startup time of internationalized applications greatly improved through
1502 iconv cache. Use iconvconfig to generate the cache file.
1503 Contributed by Ulrich Drepper.
1505 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1506 severe performance problems. Patch by David Mosberger.
1508 * The Hurd port got a lot more functionality like AIO, various stdio
1509 extensions, etc. Mainly done by Roland McGrath.
1511 * mtrace can now lookup symbols in shared libraries.
1515 * Intel's IA-64 math library is largely integrated. It provides fast and
1516 accurate implementatations for most basic and standard math functions
1517 in float, double, and long double format.
1519 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1520 and asin for the 96-bit long double format and asin, log, tan for the
1521 128-bit long double format.
1523 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1524 The basic double functions exist today. Contributed by Abraham Ziv
1525 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1526 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1528 * An asynchronous name lookup library was added. The interface is designed
1529 after POSIX AIO. The proposal was circulated beforehand to get comments.
1530 No negative ones came in. Implemented by Ulrich Drepper.
1532 * Port to S390/64bit contributed by Martin Schwidefsky
1533 <schwidefsky@de.ibm.com>.
1535 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1536 of functions for Linux/IA-64.
1538 * The RPC code is now thread safe. Threads can now use the same service
1539 of different services at the same time. Patch by Eric Norum
1540 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1542 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1543 family of functions for Linux/S390.
1545 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1546 of functions for Linux/x86.
1548 * Port to Linux/CRIS contributed by Axis Communications.
1552 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1553 we can now check for namespace violations and missing declarations. The
1554 result is that almost all headers are now Unix-compliant (as defined in
1555 the upcoming XPG6). The negative side is that some programs might need
1556 corrections, too, if they depend on the incorrect form of the headers in
1557 previous versions which defined too many symbols and included too many
1560 * regex now handles multibyte character sets correctly.
1561 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1563 * iconv (the program) does now conform to the upcoming XPG6 and handles
1564 charmaps. Instead of the charset names the path of charmaps can be
1565 provided and the conversion happens based on this data.
1566 Contributed by Ulrich Drepper.
1568 * The locale program now provides detailed information about the installed
1573 only lists the names of the supported locales
1577 provides details such as country, language, and codeset name.
1578 Contributed by Ulrich Drepper.
1582 * The gencat program now parses the input file according to the charset
1583 selected by the LC_CTYPE category. This is important for stateful
1584 character sets. To make generating catalogs easier there is a way
1585 to overwrite the charset selected by the locale: before the first
1586 message or $ quote line the catalog can contain a line like
1588 $ codeset=ISO-8859-2
1590 to select the charset (ISO-8859-2 in this case).
1592 Implemented by Shinya Hanataka and Ulrich Drepper.
1594 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1595 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1596 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1598 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1599 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1601 * The LANGUAGE environment variable is now ignored unless the locale is
1602 changed from the default "C" locale.
1604 * The usual bug fixes.
1608 * Greg McGary added runtime support for bounds checking using gcc's
1609 new -fbounded-pointers option. ix86 target is complete. PowerPC
1612 * Thorsten Kukuk added secure mode support to nscd.
1614 * The Berkeley db libraries have been removed.
1616 Related, the nss_db module is now in a separate package since it
1617 obviously requires a database library being available.
1619 * Wide character I/O streams implemented by Ulrich Drepper.
1621 * Functions from the extended socket API added by Ulrich Drepper.
1623 * Functions feenableexcept and fedisableexcept to control the
1624 behaviour of individual exceptions have been added by Andreas Jaeger.
1626 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1628 * The resolver code has been updated from bind 8.2.3-T5B which supports
1629 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1632 This change could in some situations effect backward compatibility. Since
1633 now `_res' is a thread-local instead of a global variable, modifying it
1634 in one thread does not have any effect in other threads.
1636 The resolver library was also extended to allow IPv6 as the transport
1637 protocol for the requests. This work was done by Stig Venaas.
1639 * Compatibility code for K&R C compilers has been removed from the
1640 header files. A ISO C compiler is needed to use the library
1641 (conforming to either C89 or C99 standard).
1643 * Complete rewrite of the localedef program to support multibyte character
1644 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1645 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1646 Implemented by Ulrich Drepper.
1648 Bruno Haible significantly improved the generation and use of the data
1649 structures for the wide character tables.
1651 * Plural handling in gettext implemented by Ulrich Drepper.
1653 * The utmp daemon has been removed.
1655 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1657 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1660 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1662 * POSIX barriers implemented by Kaz Kylheku.
1664 * POSIX spawn function family implemented by Ulrich Drepper.
1666 * POSIX spinlocks are now available.
1668 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1670 * the configure option --enable-kernel=X.Y.Z allows to strip out
1671 compatibility for kernel versions before X.Y.Z. This is currently only
1672 implemented for Linux.
1674 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1675 field sin6_scope_id. This means that all programs using IPv6 should be
1676 recompiled. Don't expect binary compatibility with previous glibc
1679 * various conversion modules for IBM character sets contributed by
1682 * IA-64 port by Jes Sorensen and HJ Lu.
1696 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1698 * New xdr functions are added; some rpc functions are now 64bit clean.
1700 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1702 * Fixed known incompatibilities with glibc 2.0.
1704 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1706 * Optimized a number of functions (especially the ELF dynamic loader).
1708 * Update timezone data files.
1710 * lots of charmaps corrections
1712 * some new locale definitions and charmaps
1717 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1718 conform to POSIX member type requirements. Symbol versions have been
1719 adjusted as needed within the library, and for direct use by applications,
1720 but there is potential for problems if third-party libraries use
1721 struct timeval as part of their interface. This does not present
1722 a problem for X and other "essential" system libraries.
1724 * An additional locale model to support C++ Standard Library locale
1725 model and probably more was implemented by Ulrich Drepper.
1727 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1730 * Miles Bader provided the `argp' function family to support hierachical
1731 command line argument parsing, layered on top of getopt.
1733 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1735 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1738 * scanf recognizes the %a and %A format for scanning floating point numbers.
1740 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1741 information and interfaces for the available integer types.
1743 * about 130 new math functions were added to implement the ISO C9x math
1746 * the new header <complex.h> contains definitions of the complex math
1747 functions from ISO C 9X.
1749 * the new header <tgmath.h> defines generic macros to use complex or
1750 real valued functions.
1752 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1754 * Andreas Jaeger provided a test suite for the math library.
1756 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1758 * Ulrich Drepper added character set conversion functions (iconv).
1760 * Optimized string functions have been added.
1762 * The localedata addon is now part of glibc.
1764 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1766 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1767 daemon for NSS (nscd).
1769 Missing a better place here are some numbers on improvements. Under
1770 Linux 2.1.125 un-tar-ing the kernel sources takes
1774 using local files 12.19s 6.88s 22.91s
1776 using NIS 13.92s 8.91s 26.34s
1778 using NIS & nscd 10.37s 7.34s 25.30s
1780 using NIS+ 27.57s 30.37s 640.46s
1782 using NIS+ & nscd 10.25s 7.83s 26.51s
1784 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1786 Keep in mind that non-namelookup related operations dominate above times.
1787 It was just a common complain that using NIS+ unpacking the kernel is
1790 [1] The old nscd implementation is not available anymore since it was
1791 distributed with glibc up to version 2.0.98 and thus is now replaced.
1793 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1795 * Mark Kettenis provided a Hesiod NSS module.
1797 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1798 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1800 * rcmd can now handle netgroups (Dick Streefland).
1802 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1805 * Support for the IPv6 protocol has been added to the socket API, as per the
1806 latest draft standards.
1808 * Support for Linux 2.2 has been added.
1810 * Interface changes relative to the latest 2.0.x release:
1811 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1812 addseverity NEW: Unix98
1813 alphasort64 NEW: LFS
1814 argp_err_exit_status NEW: argp, GNU ext
1815 argp_error NEW: argp, GNU ext
1816 argp_failure NEW: argp, GNU ext
1817 argp_help NEW: argp, GNU ext
1818 argp_parse NEW: argp, GNU ext
1819 argp_program_bug_address NEW: argp, GNU ext
1820 argp_program_version NEW: argp, GNU ext
1821 argp_program_version_hook NEW: argp, GNU ext
1822 argp_state_help NEW: argp, GNU ext
1823 argp_usage NEW: argp, GNU ext
1824 authdes_create NEW: Secure RPC
1825 authdes_getucred NEW: Secure RPC
1826 authdes_pk_create NEW: Secure RPC
1827 backtrace NEW: GNU ext.
1828 backtrace_symbols NEW: GNU ext.
1829 backtrace_symbols_fd NEW: GNU ext.
1831 cacosf NEW: ISO C 9x
1832 cacosh NEW: ISO C 9x
1833 cacoshf NEW: ISO C 9x
1834 cacoshl NEW: ISO C 9x
1835 cacosl NEW: ISO C 9x
1842 casinf NEW: ISO C 9x
1843 casinh NEW: ISO C 9x
1844 casinhf NEW: ISO C 9x
1845 casinhl NEW: ISO C 9x
1846 casinl NEW: ISO C 9x
1848 catanf NEW: ISO C 9x
1849 catanh NEW: ISO C 9x
1850 catanhf NEW: ISO C 9x
1851 catanhl NEW: ISO C 9x
1852 catanl NEW: ISO C 9x
1853 cbc_crypt NEW: Secure RPC
1857 ccoshf NEW: ISO C 9x
1858 ccoshl NEW: ISO C 9x
1864 cimagf NEW: ISO C 9x
1865 cimagl NEW: ISO C 9x
1866 clearerr_locked REMOVED
1867 clntunix_create NEW: sunrpc ext
1869 clog10 NEW: ISO C 9x
1870 clog10f NEW: ISO C 9x
1871 clog10l NEW: ISO C 9x
1881 cprojf NEW: ISO C 9x
1882 cprojl NEW: ISO C 9x
1884 crealf NEW: ISO C 9x
1885 creall NEW: ISO C 9x
1890 csinhf NEW: ISO C 9x
1891 csinhl NEW: ISO C 9x
1894 csqrtf NEW: ISO C 9x
1895 csqrtl NEW: ISO C 9x
1899 ctanhf NEW: ISO C 9x
1900 ctanhl NEW: ISO C 9x
1902 des_setparity NEW: Secure RPC
1903 ecb_crypt NEW: Secure RPC
1904 endutxent NEW: Unix98
1906 exp10f NEW: ISO C 9x
1907 exp10l NEW: ISO C 9x
1911 fattach NEW: STREAMS
1912 fdetach NEW: STREAMS
1916 feclearexcept NEW: ISO C 9x
1917 fegetenv NEW: ISO C 9x
1918 fegetexceptflag NEW: ISO C 9x
1919 fegetround NEW: ISO C 9x
1920 feholdexcept NEW: ISO C 9x
1922 feraiseexcept NEW: ISO C 9x
1923 ferror_locked REMOVED
1924 fesetenv NEW: ISO C 9x
1925 fesetexceptflag NEW: ISO C 9x
1926 fesetround NEW: ISO C 9x
1927 fetestexcept NEW: ISO C 9x
1928 feupdateenv NEW: ISO C 9x
1929 fflush_locked REMOVED
1933 fgets_unlocked NEW: GNU ext.
1934 fileno_locked REMOVED
1946 fputc_locked REMOVED
1947 fputs_unlocked NEW: GNU ext.
1948 fread_unlocked NEW: GNU ext.
1953 fstatvfs NEW: Unix98
1957 ftruncate64 NEW: LFS
1959 fwrite_unlocked NEW: GNU ext.
1960 gai_strerror NEW: IPv6
1964 getchar_locked REMOVED
1966 getdate_err NEW: Unix98
1967 getdate_r NEW: GNU ext.
1969 getnameinfo NEW: IPv6
1970 getnetname NEW: Secure RPC
1971 getpmsg NEW: STREAMS
1972 getpt NEW: Unix98 PTY
1973 getrlimit64 NEW: LFS
1974 getutxent NEW: Unix98
1975 getutxid NEW: Unix98
1976 getutxline NEW: Unix98
1977 glob64 NEW: GNU ext.
1978 globfree64 NEW: GNU ext.
1979 gnu_get_libc_release NEW: GNU ext.
1980 gnu_get_libc_version NEW: GNU ext.
1981 grantpt NEW: Unix98 PTY
1982 host2netname NEW: Secure RPC
1984 iconv_close NEW: iconv
1985 iconv_open NEW: iconv
1986 if_freenameindex NEW: IPv6
1987 if_indextoname NEW: IPv6
1988 if_nameindex NEW: IPv6
1989 if_nametoindex NEW: IPv6
1990 in6addr_any NEW: IPv6
1991 in6addr_loopback NEW: IPv6
1992 inet6_isipv4mapped NEW: IPv6
1993 isastream NEW: STREAMS
1994 iswblank NEW: GNU ext.
1995 key_decryptsession NEW: Secure RPC
1996 key_decryptsession_pk NEW: Secure RPC
1997 key_encryptsession NEW: Secure RPC
1998 key_encryptsession_pk NEW: Secure RPC
1999 key_gendes NEW: Secure RPC
2000 key_get_conv NEW: Secure RPC
2001 key_secretkey_is_set NEW: Secure RPC
2002 key_setnet NEW: Secure RPC
2003 key_setsecret NEW: Secure RPC
2004 llrint NEW: ISO C 9x
2005 llrintf NEW: ISO C 9x
2006 llrintl NEW: ISO C 9x
2007 llround NEW: ISO C 9x
2008 llroundf NEW: ISO C 9x
2009 llroundl NEW: ISO C 9x
2014 lrintf NEW: ISO C 9x
2015 lrintl NEW: ISO C 9x
2016 lround NEW: ISO C 9x
2017 lroundf NEW: ISO C 9x
2018 lroundl NEW: ISO C 9x
2020 makecontext NEW: Unix98
2021 mempcpy NEW: GNU ext.
2024 modify_ldt NEW: kernel
2028 nearbyint NEW: ISO C 9x
2029 nearbyintf NEW: ISO C 9x
2030 nearbyintl NEW: ISO C 9x
2031 netname2host NEW: Secure RPC
2032 netname2user NEW: Secure RPC
2033 nexttoward NEW: ISO C 9x
2034 nexttowardf NEW: ISO C 9x
2035 nexttowardl NEW: ISO C 9x
2039 passwd2des NEW: Secure RPC
2041 pow10f NEW: GNU ext.
2042 pow10l NEW: GNU ext.
2045 printf_size NEW: GNU ext.
2046 printf_size_info NEW: GNU ext.
2047 profil_counter REMOVED
2048 pthread_mutexattr_getkind_np REPLACED
2049 pthread_mutexattr_setkind_np REPLACED
2050 ptsname NEW: Unix98 PTY
2051 ptsname_r NEW: Unix98 PTY
2053 putchar_locked REMOVED
2054 putgrent NEW: GNU ext.
2056 putpmsg NEW: STREAMS
2057 pututxline NEW: Unix98
2061 readdir64_r NEW: LFS
2062 remquo NEW: ISO C 9x
2063 remquof NEW: ISO C 9x
2064 remquol NEW: ISO C 9x
2066 roundf NEW: ISO C 9x
2067 roundl NEW: ISO C 9x
2069 scalbln NEW: ISO C 9x
2070 scalblnf NEW: ISO C 9x
2071 scalblnl NEW: ISO C 9x
2073 sendfile NEW: kernel
2074 setcontext NEW: Unix98
2075 setrlimit64 NEW: LFS
2076 setutxent NEW: Unix98
2078 sigignore NEW: Unix98
2079 sigqueue NEW: POSIX.1b
2080 sigrelse NEW: Unix98
2081 sigset NEW: POSIX.1b
2082 sigtimedwait NEW: POSIX.1b
2083 sigwaitinfo NEW: POSIX.1b
2084 sincos NEW: GNU ext.
2085 sincosf NEW: GNU ext.
2086 sincosl NEW: GNU ext.
2090 strcasestr NEW: GNU ext.
2091 strtoimax NEW: ISO C 9x
2092 strtoumax NEW: ISO C 9x
2093 strverscmp NEW: GNU ext.
2094 svcauthdes_stats NEW: Secure RPC
2095 svcunix_create NEW: sunrpc etx
2096 svcunixfd_create NEW: sunrpc ext
2097 swapcontext NEW: Unix98
2098 tcgetsid NEW: Unix98 PTY
2099 tdestroy NEW: GNU ext.
2100 tgamma NEW: ISO C 9x
2101 tgammaf NEW: ISO C 9x
2102 tgammal NEW: ISO C 9x
2106 truncf NEW: ISO C 9x
2107 truncl NEW: ISO C 9x
2109 unlockpt NEW: Unix98 PTY
2110 updwtmpx NEW: Unix98
2111 user2netname NEW: Secure RPC
2112 utmpxname NEW: Unix98
2113 versionsort NEW: GNU ext.
2114 versionsort64 NEW: GNU ext.
2116 wcscasecmp NEW: GNU ext.
2117 wcsncasecmp NEW: GNU ext.
2118 wcsnlen NEW: GNU ext.
2119 wcstoimax NEW: ISO C 9x
2120 wcstoll NEW: ISO C 9x
2121 wcstoull NEW: ISO C 9x
2122 wcstoumax NEW: ISO C 9x
2124 wordexp NEW: POSIX.2
2125 wordfree NEW: POSIX.2
2126 write_profiling REMOVED
2127 xdecrypt NEW: Secure RPC
2128 xdr_authdes_cred NEW: Secure RPC
2129 xdr_authdes_verf NEW: Secure RPC
2130 xdr_cryptkeyarg NEW: Secure RPC
2131 xdr_cryptkeyarg2 NEW: Secure RPC
2132 xdr_cryptkeyres NEW: Secure RPC
2133 xdr_getcredres NEW: Secure RPC
2134 xdr_key_netstarg NEW: Secure RPC
2135 xdr_key_netstres NEW: Secure RPC
2136 xdr_keybuf NEW: Secure RPC
2137 xdr_keystatus NEW: Secure RPC
2138 xdr_netnamestr NEW: Secure RPC
2139 xdr_sizeof NEW: Secure RPC
2140 xdr_unixcred NEW: sunrpc ext
2141 xencrypt NEW: Secure RPC
2142 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2153 * inet_ntoa is thread-safe
2155 * updwtmp is moved from libutil to libc
2157 * rewrite of cbrt function
2159 * update of timezone data
2173 * add atoll function
2175 * fix complex problems in Berkeley DB code
2177 * fix math functions
2181 * fixed lots of header problems (especially Linux/GNU specific)
2183 * dynamic loader preserves all registers
2185 * Roland McGrath provided support for handling of auxiliary objects in
2186 the ELF dynamic loader.
2188 * support for parallel builds is improved
2192 * GNU extensions are no longer declared by default. To enable them you
2193 must define the macro `_GNU_SOURCE' in your program or compile with
2196 * The library has changed from using GNU ld symbol aliases to using weak
2197 symbols where available. The ELF object file format supports weak
2198 symbols; GNU ld also supports weak symbols in the a.out format. (There
2199 is also now support for other GNU ld extensions in ELF. Use the
2200 `--with-elf' option to configure to indicate you have ELF, and
2201 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2202 of many files which contained only symbol aliases, reducing the size of
2203 the source and the compiled library; many other files were renamed to
2204 less cryptic names previously occupied by the symbol alias files.
2205 There is a new header file <elf.h> for programs which operate on
2206 files in the ELF format.
2208 * Converted to Autoconf version 2, so `configure' has more options.
2209 Run `configure --help' to see the details.
2211 * The library can now be configured to build profiling, highly-optimized
2212 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2213 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2214 `configure' enable building these extra libraries. The shared library is
2215 built by default when using both ELF and GNU ld. When shared libraries
2216 are enabled, the new library `-ldl' is available for arbitrary run-time
2217 loading of shared objects; its interface is defined in <dlfcn.h>. The
2218 new header file <link.h> gives access to the internals of the run-time
2219 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2220 application of same name on other systems and it provides information
2221 about dynamically linked binaries.
2223 * The C library now provides the run-time support code for profiling
2224 executables compiled with `-pg'. Programs can control the profiling code
2225 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2226 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2227 the support for this file format was contributed by David Mosberger-Tang.
2229 * The math code has been replaced with a math library based on fdlibm from
2230 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2231 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2232 functions. The math functions now reside in a separate library, so
2233 programs using them will need to use `-lm' their linking commands.
2235 * John C. Bowman contributed optimized ix87 assembler inline functions.
2237 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2238 mechanism similar to that found in Solaris 2. This is now used for the
2239 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2240 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2241 file controls what services are used for each individual database. This
2242 works by loading shared libraries with names specified in `nsswitch.conf',
2243 so service modules can be changed or added at any time without even
2244 relinking any program. Currently there are the file, db, and NIS based
2245 NSS services available.
2247 * The new functions `strtoq' and `strtouq' parse integer values from
2248 strings, like `strtol' and `strtoul', but they return `long long int' and
2249 `unsigned long long int' values, respectively (64-bit quantities).
2251 * The new functions `strtof' and `strtold' parse floating-point values from
2252 strings, like `strtod', but they return `float' and `long double' values,
2253 respectively (on some machines `double' and `long double' are the same).
2255 * Ulrich Drepper has contributed new implementations of the floating-point
2256 printing and reading code used in the `printf' family of functions and
2257 `strtod', `strtof', and `strtold'. These new functions are perfectly
2258 accurate, and much faster than the old ones.
2260 * The implementation of the POSIX locale model was completely rewritten by
2261 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2262 to compile the POSIX locale definition.
2264 * The former dummy implementations of the strcoll and strxfrm function are
2265 now replaced by fully functional code contributed by Ulrich Drepper. The
2266 collation information comes from the POSIX locale definitions.
2268 * The new header <langinfo.h> defines an interface for accessing
2269 various locale-dependent data (using the locale chosen with `setlocale').
2271 * Ulrich Drepper has contributed a new suite of functions for operation on
2272 wide-character and multibyte-character strings, in <wchar.h>;
2273 and classification and case conversion of wide characters, in <wctype.h>.
2274 These new functions are conforming to the ISO C, Amendement 1 specification.
2276 * There is now a second implementation of the standard I/O library available.
2277 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2278 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2280 * You can now use positional parameter specifications in format strings
2281 for the `printf' and `scanf' families of functions. For example,
2282 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2283 ``Number 6, Mr Jones''. This is mainly useful when providing different
2284 format strings for different languages, whose grammars may dictate
2285 different orderings of the values being printed. To support this
2286 feature, the interface for `register_printf_handler' has changed; see
2287 the header file <printf.h> for details.
2289 * The `printf' and `scanf' families of functions now understand a new
2290 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2291 to group numbers as indicated by the locale; for `scanf' and friends, this
2292 says to accept as valid only a number with all the proper grouping
2293 separators in the right places. In the default "C" locale, numbers are
2294 not grouped; but locales for specific countries will define the usual
2295 conventions (i.e. separate thousands with `,' in the US locale).
2297 * The pgrp functions have been regularized, slightly incompatibly but much
2298 less confusingly. The core functions are now `getpgid' and `setpgid',
2299 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2300 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2301 provided for compatibility. There is no longer an incompatible `getpgrp'
2302 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2304 * The new header file <fts.h> and suite of functions simplify programs that
2305 operate on directory trees. This code comes from 4.4 BSD.
2307 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2308 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2309 NSS scheme used in glibc.
2311 * There is a new malloc debugging hook `__memalign_hook'.
2313 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2314 `unsigned int' in <sys/types.h>. These are for compatibility only and
2315 their use is discouraged.
2317 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2318 done differently, so that it works even without GNU ld.
2320 * New function `euidaccess' checks allowed access to a file like `access',
2321 but using the effective IDs instead of the real IDs.
2323 * The time zone data files have been updated for the latest and greatest
2324 local time conventions of the countries of the world.
2326 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2329 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2330 for formatting floating-point numbers. They are provided only for
2331 compatibility; new programs should use `sprintf' instead. There are
2332 also equivalent function for the `long double' floating-point type and
2333 all functions also exist in a reentrant form.
2335 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2336 functions for maintaining the login-record files (primarily of use to
2337 system programs such as `login'), and convenient functions for
2338 allocating and initializing a pseudo-terminal (pty) device.
2340 * Ulrich Drepper has contributed new support for System V style
2341 shared memory and IPC on systems that support it.
2343 * Ulrich Drepper has contributed several miscellaneous new functions found
2344 in System V: The `hsearch' family of functions provide an effective
2345 implementation of hash tables; `a64l' and `l64a' provide a very simple
2346 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2349 * Ulrich Drepper has contributed new reentrant counterparts for the
2350 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2352 * Ulrich Drepper has contributed new, highly-optimized versions of several
2353 string functions for the i486/Pentium family of processors.
2355 * Ulrich Drepper has updated the Linux-specific code, based largely
2356 on work done in Hongjiu Lu's version of GNU libc for Linux.
2357 The GNU library now supports Linux versions 2.0.10 and later,
2358 using the ELF object file format (i[3456]86-*-linux).
2360 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2362 * David Mosberger-Tang and Richard Henderson have ported the C library
2363 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2364 dynamic linking support for ELF/Alpha.
2366 * Richard Henderson contributed several Alpha optimized assembler function
2367 for arithmetic and string handling.
2369 * Ulrich Drepper has contributed a new set of message catalog functions to
2370 support multiple languages using the <libintl.h> interface, for use with
2371 his new package GNU gettext. Translation volunteers have contributed
2372 catalogs of the library's messages in Spanish, German, and Korean.
2374 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2375 program and the `catgets' function for reading the catalog files it
2376 creates. (The <libintl.h> interface is preferred; we include the
2377 <nl_types.h> interface using `catgets' only for source compatibility with
2378 programs already written to use it.)
2380 * New header file <values.h> gives SVID-compatible names for <limits.h>
2383 * Various new macros, declarations, and small header files for compatibility
2386 * New function `group_member' is a convenient way to check if a process has
2387 a given effective group ID.
2389 * When using GCC 2.7 and later, the socket functions are now declared in a
2390 special way so that passing an argument of type `struct sockaddr_in *',
2391 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2392 `struct sockaddr *' type, does not generate a type-clash warning.
2394 * New function `error' declared in header file <error.h> is a convenient
2395 function for printing error messages and optionally exiting; this is the
2396 canonical function used in GNU programs. The new functions `err', `warn',
2397 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2398 doing the same thing.
2400 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2401 POSIX.2 `glob' function to do ~ and {...} expansion.
2403 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2404 `clearenv' which is used in POSIX.9 is also available.
2406 * New function `getsid' returns session ID number on systems that support it.
2408 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2409 files <db.h> and <mpool.h> provide a rich set of functions for several
2410 types of simple databases stored in memory and in files, and <ndbm.h> is
2411 an old `ndbm'-compatible interface using the `db' functions. Link with
2412 `-ldb' to get these functions.
2414 * New macro `strdupa' copies a string like `strdup', but uses local stack
2415 space from `alloca' instead of dynamic heap space from `malloc'.
2417 * New function `strnlen' is like `strlen' but searches only a given maximum
2418 number of characters for the null terminator. `stpncpy', `strndup' and
2419 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2422 * New function `statfs' in header <sys/statfs.h>.
2424 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2425 provide convenient functions for operating on blocks of null-terminated
2428 * A new suite of functions in <utmp.h> handle all the details of reading
2429 and writing the utmp file.
2431 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2434 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2435 completely POSIX compliant and also implemented the extended functionality
2436 to handle alternate digit representation and alternate era date formats.
2438 * Ulrich Drepper provided an implementation of the `strptime' function
2439 defined in XPG4.2 which transforms a string into a `struct tm' value.
2441 * Paul Eggert provided the tzselect shell script as part of the timezone
2442 code. The shell script makes it easy to select the correct timezone
2445 * The implementation of the malloc family of functions is completely replaced
2446 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2447 The implementation uses the mmap function (if available) and it is
2448 optimized for the use in multi threaded programs.
2450 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2451 functions. This new functionality is usable by specifying a special
2452 salt string and it is compatible with implementation on *BSD systems.
2454 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2455 `getsubopt' to handle second level command line options, `bsd_signal'
2456 to access BSD style `signal' functionality, the obsolete `regexp' style
2459 * the `lchown' function is available on system which support this
2462 * The implementation of the shadow password handling function was contributed
2465 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2467 * POSIX.1g support was added. The <sys/select.h> header is available,
2468 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2469 implementation of `getaddrinfo'.
2473 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2475 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2476 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2478 * The new function `daemon' from 4.4 BSD is useful for server programs that
2479 want to put themselves in the background.
2481 * Joel Sherrill has contributed support for several standalone boards that
2482 run without an operating system.
2484 * `printf', `scanf' and friends now accept a `q' type modifier for long
2485 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2487 * All of the code taken from BSD (notably most of the math and networking
2488 routines) has been updated from the BSD 4.4-Lite release.
2490 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2492 * The new functions `getdomainname' and `setdomainname' fetch or change the
2493 YP/NIS domain name. These are system calls which exist on systems which
2496 * The time zone data files have been updated for the latest international
2499 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2500 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2504 * The C library now includes support for Sun RPC, from Sun's free
2505 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2506 are included. (There is still no support for YP.)
2508 * Tom Quinn has contributed a port of the C library to SGI machines running
2509 Irix 4 (mips-sgi-irix4).
2511 * The new `lockf' function is a simplified interface to the locking
2512 facilities of `fcntl', included for compatibility.
2514 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2516 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2518 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2521 * The error message printed by `assert' for a failed assertion now includes
2522 the name of the program (if using GNU ld) and the name of the calling
2523 function (with versions of GCC that support this).
2525 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2527 * The library now includes the <sys/mman.h> header file and memory
2528 management functions `mmap', `munmap', `mprotect', `msync', and
2529 `madvise', on systems that support those facilities.
2531 * The interface for `mcheck' has changed slightly: the function called to
2532 abort the program when an allocation inconsistency is detected now takes
2533 an argument that indicates the type of failure. The new function
2534 `mprobe' lets you request a consistency check for a particular block at
2535 any time (checks are normally done only when you call `free' or `realloc'
2538 * It is now possible to easily cross-compile the C library, building on one
2539 system a library to run on another machine and/or operating system. All
2540 you need to do is set the variable `HOST_CC' in `configparms' to the
2541 native compiler for programs to run on the machine you are building on (a
2542 few generator programs are used on Unix systems); set `CC' to the
2545 * The new function `fexecve' (only implemented on the GNU system) executes
2546 a program file given a file descriptor already open on the file.
2550 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2551 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2553 * You can set the variable `libprefix' in `configparms' to specify a prefix
2554 to be prepended to installed library files; this makes it easy to install
2555 the GNU C library to be linked as `-lgnuc' or whatever.
2557 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2558 copies a limited number of characters from a string, and returns the
2559 address of the last character written.
2561 * You no longer need to check for whether the installed `stddef.h' is
2562 compatible with the GNU C library. configure now checks for you.
2564 * You can now define a per-stream `fileno' function to convert the
2565 stream's cookie into an integral file descriptor.
2567 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2568 allocates zero bytes of storage, and returns a unique pointer which
2569 you can pass to `realloc' or `free'. The behavior is undefined if
2570 you dereference this pointer.
2572 * The C library now runs on Sony NEWS m68k machines running either
2573 NewsOS 3 or NewsOS 4.
2575 * The new `syscall' function is a system-dependent primitive function
2576 for invoking system calls. It has the canonical behavior on Unix
2577 systems, including unreliable return values for some calls (such as
2578 `pipe', `fork' and `getppid').
2580 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2581 to `EAGAIN', which is the preferred name. On systems whose kernels
2582 use two distinct codes, the C library now translates EWOULDBLOCK to
2583 EAGAIN in every system call function.
2587 * The GNU C Library Reference Manual is now distributed with the library.
2588 `make dvi' will produce a DVI file of the printed manual.
2589 `make info' will produce Info files that you can read on line using C-h i
2590 in Emacs or the `info' program.
2591 Please send comments on the manual to bug-glibc-manual@gnu.org.
2593 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2595 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2597 * Jason Merrill has contributed a port to the Sequent Symmetry running
2598 Dynix version 3 (i386-sequent-dynix).
2600 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2601 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2603 * New function `memory_warnings' lets you arrange to get warnings when
2604 malloc is running out of memory to allocate, like Emacs gives you.
2606 * The C library now contains the relocating allocator used in Emacs 19 for
2607 its editing buffers. This allocator (ralloc) minimizes allocation
2608 overhead and fragmentation by moving allocated regions around whenever it
2609 needs to. You always refer to a ralloc'd region with a "handle" (a
2610 pointer to a pointer--an object of type `void **').
2612 * There is a new `printf' format: `%m' gives you the string corresponding
2613 to the error code in `errno'.
2615 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2616 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2617 pass, the `a' modifier says to fill in a `char **' you pass with a
2620 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2621 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2622 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2624 * `mkstemp' is a traditional Unix function to atomically create and open a
2625 uniquely-named temporary file.
2629 * The standard location for the file that says what the local timezone is
2630 has changed again. It is now `/usr/local/etc/localtime' (or more
2631 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2633 * The distribution no longer contains any files with names longer than 14
2636 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2637 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2639 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2643 * The configuration process has changed quite a bit. The `configure'
2644 script is now used just like the configuration scripts for other GNU
2645 packages. The `sysdeps' directory hierarchy is much rearranged.
2646 The file `INSTALL' explains the new scheme in detail.
2648 * The header files no longer need to be processed into ANSI C and
2649 traditional C versions. There is just one set of files to install, and
2650 it will work with ANSI or old C compilers (including `gcc -traditional').
2652 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2653 MIPS DECStation running Ultrix 4.
2655 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2656 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2657 made itself into a shared library.
2659 * Yet further improved support for the i386, running 4.3 BSD-like systems
2660 (such as Mach 3 with the Unix single-server), or System V.
2662 * New function `strncasecmp' to do case-insensitive string comparison
2663 with limited length.
2665 * New function `strsep' is a reentrant alternative to `strtok'.
2667 * New functions `scandir' and `alphasort' for searching directories.
2669 * New function `setenv' is a better interface to `putenv'.
2671 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2672 function for traversing a directory tree.
2674 * The GNU obstack package is now also part of the C library.
2675 The new function `open_obstack_stream' creates a stdio stream that
2676 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2677 formatted output directly to an obstack.
2679 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2680 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2682 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2684 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2685 things to your strings.
2687 * There are some new test programs: test-fseek, testmb, and testrand.
2689 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2690 These ports are not finished, but are a good starting place for really
2691 supporting those systems.
2693 * `/etc/localtime' is now the standard location for the file that says what
2694 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2695 This follows the general principle that `/etc' is the place for all local
2696 configuration files.
2698 * The C library header files now use `extern "C"' when used by the C++
2699 compiler, so the C library should now work with C++ code.
2701 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2702 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2705 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2706 function which uses the `merge sort' algorithm, and is said to be
2707 significantly faster than the old GNU `qsort' function. Merge sort is
2708 now the standard `qsort' function. The new algorithm can require a lot
2709 of temporary storage; so, the old sorting function is called when the
2710 required storage is not available.
2712 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2713 provides the Unix `crypt' function, plus some other entry points.
2715 * The code and header files taken from 4.4 BSD have been updated with the
2716 latest files released from Berkeley.
2718 ----------------------------------------------------------------------
2719 Copyright information:
2721 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2723 Permission is granted to anyone to make or distribute verbatim copies
2724 of this document as received, in any medium, provided that the
2725 copyright notice and this permission notice are preserved,
2726 thus giving the recipient permission to redistribute in turn.
2728 Permission is granted to distribute modified versions
2729 of this document, or of portions of it,
2730 under the above conditions, provided also that they
2731 carry prominent notices stating who last changed them.
2734 version-control: never