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:
12 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
13 14094, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969, 16159,
14 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538, 16559,
15 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293, 17322,
16 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620, 17621,
17 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833, 17836,
18 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965, 17967,
19 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007, 18019,
20 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042, 18043,
21 18046, 18047, 18049, 18068, 18080, 18093, 18100, 18104, 18110, 18111,
22 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197, 18206, 18210,
23 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245, 18247, 18287,
24 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400, 18409, 18410,
25 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469, 18470, 18479,
26 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508, 18512, 18513,
27 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534,
28 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547, 18549, 18553,
29 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593, 18594, 18602,
30 18612, 18613, 18619, 18633, 18641, 18643, 18648, 18657, 18676, 18694,
33 * Cache information can be queried via sysconf() function on s390 e.g. with
34 _SC_LEVEL1_ICACHE_SIZE as argument.
36 * A buffer overflow in gethostbyname_r and related functions performing DNS
37 requests has been fixed. If the NSS functions were called with a
38 misaligned buffer, the buffer length change due to pointer alignment was
39 not taken into account. This could result in application crashes or,
40 potentially arbitrary code execution, using crafted, but syntactically
41 valid DNS responses. (CVE-2015-1781)
43 * The time zone file parser has been made more robust against crafted time
44 zone files, avoiding heap buffer overflows related to the processing of
45 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
46 large time zone data files. Overly long time zone specifiers in the TZ
47 variable no longer result in stack overflows and crashes.
49 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
50 for LD and GD on x86 and x86-64, has been implemented. You will need
51 binutils-2.24 or later to enable this optimization.
53 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
54 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
55 Hat). These updates cause user visible changes, such as the fix for bug
58 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
59 and getXXbyYY NSS calls for the same database, causing a denial-of-service
60 condition in some applications.
62 * Added vector math library named libmvec with the following vectorized x86_64
63 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
65 The library can be disabled with --disable-mathvec. Use of the functions is
66 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
67 Shared library libmvec.so is linked in as needed when using -lm (no need to
68 specify -lmvec explicitly for not static builds).
69 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
71 * A new fmemopen implementation has been added with the goal of POSIX
72 compliance. The new implementation fixes the following long-standing
73 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
74 old implementation is still present for use be by existing binaries.
76 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
77 releases. It has been fixed to match 2.19 and older, but binaries built
78 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
80 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
81 Contributed by Roland McGrath (Google).
85 * The following bugs are resolved with this release:
87 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
88 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
89 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
90 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
91 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
92 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
93 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
94 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
95 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
96 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
99 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
100 too little memory for the to-be-scanned arguments and overflow the
101 allocated buffer. The implementation now correctly computes the required
102 buffer size when using malloc, and switches to malloc from alloca as
105 * A new semaphore algorithm has been implemented in generic C code for all
106 machines. Previous custom assembly implementations of semaphore were
107 difficult to reason about or ensure that they were safe. The new version
108 of semaphore supports machines with 64-bit or 32-bit atomic operations.
109 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
110 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
112 * Port to Altera Nios II has been contributed by Mentor Graphics.
114 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
115 implementations for powerpc64/powerpc64le.
116 Implemented by Adhemerval Zanella (IBM).
118 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
119 and powerpc64le. This may improve lock scaling of existing programs on
120 HTM capable systems. The lock elision code is only enabled with
121 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
122 powerpc will issue a transaction abort on every syscall to avoid side
123 effects being visible outside transactions.
125 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
126 AArch64. Contributed by ARM Ltd.
128 * i386 memcpy functions optimized with SSE2 unaligned load/store.
130 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
131 under certain input conditions resulting in the execution of a shell for
132 command substitution when the application did not request it. The
133 implementation now checks WRDE_NOCMD immediately before executing the
134 shell and returns the error WRDE_CMDSUB as expected.
136 * CVE-2012-3406 printf-style functions could run into a stack overflow when
137 processing format strings with a large number of format specifiers.
139 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
140 infinite loop if the DNS response contained a PTR record of an unexpected
143 * The minimum GCC version that can be used to build this version of the GNU
144 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
145 still be used to compile programs using the GNU C Library.
147 * The GNU C Library is now built with -Werror by default. This can be
148 disabled by configuring with --disable-werror.
150 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
152 * The obsolete sigvec function has been removed. This was the original
153 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
154 programs have been using instead for about 25 years. Of course, ABI
155 compatibility for old binaries using sigvec remains intact.
157 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
158 with newer versions of bison.
160 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
161 The original MIPS o32 hard-float ABI requires an FPU where double-precision
162 registers overlay two consecutive single-precision registers. MIPS32R2
163 introduced a new FPU mode (FR=1) where double-precision registers extend the
164 corresponding single-precision registers which is incompatible with the
165 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
166 require the use of FR=1 making a transition necessary. New o32 ABI
167 extensions enable users to migrate over time from the original o32 ABI
168 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
169 tracks the ABI of any loaded object and verifies that new objects are
170 compatible. Mode transitions will also be requested as required and
171 unsupportable objects will be rejected. The ABI checks include both soft and
172 hard float ABIs for o32, n32 and n64.
174 GCC 5 with GNU binutils 2.25 onwards:
175 It is strongly recommended that all o32 system libraries are built using the
176 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
177 with the original and all new o32 ABI extensions. Configure a MIPS GCC
178 compiler using --with-fp-32=xx to set this by default.
182 * The following bugs are resolved with this release:
184 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
185 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
186 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
187 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
188 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
189 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
190 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
191 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
192 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
193 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
194 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
195 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
196 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
197 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
198 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
200 * Reverted change of ABI data structures for s390 and s390x:
201 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
202 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
203 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
204 are preserved pointing straight to the same implementation as the old ones.
205 Given that, new callers will simply provide a too-big buffer to these
206 functions. Any applications/libraries out there that embed jmp_buf or
207 ucontext_t in an ABI-relevant data structure that have already been rebuilt
208 against 2.19 headers will have to rebuilt again. This is necessary in any
209 case to revert the breakage in their ABI caused by the glibc change.
211 * Support for file description locks is added to systems running the
212 Linux kernel. The standard file locking interfaces are extended to
213 operate on file descriptions, not file descriptors, via the use of
214 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
215 are associated with an open file instead of a process.
217 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
219 * The minimum Linux kernel version that this version of the GNU C Library
220 can be used with is 2.6.32.
222 * Running the testsuite no longer terminates as soon as a test fails.
223 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
224 with PASS or FAIL lines for individual tests. A summary of the results is
225 printed, including a list of failing lists, and "make check" exits with
226 error status if there were any unexpected failures. "make check
227 stop-on-test-failure=y" may be used to keep the old behavior.
229 * The am33 port, which had not worked for several years, has been removed
232 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
233 supported; they now act the same as _DEFAULT_SOURCE (but generate a
234 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
235 conflicted with POSIX (support for which was removed in 2.19), the
236 interfaces those macros enabled remain available when compiling with
237 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
240 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
242 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
243 This may improve lock scaling of existing programs on TX capable systems.
244 The lock elision code is only built with --enable-lock-elision=yes and
245 then requires a GCC version supporting the TX builtins. With lock elision
246 default mutexes are elided via __builtin_tbegin, if the cpu supports
247 transactions. By default lock elision is not enabled and the elision code
250 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
251 copy the path argument. This allowed programs to cause posix_spawn to
252 deference a dangling pointer, or use an unexpected pathname argument if
253 the string was modified after the posix_spawn_file_actions_addopen
256 * All supported architectures now use the main glibc sysdeps directory
257 instead of some being in a separate "ports" directory (which was
258 distributed separately before glibc 2.17).
260 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
261 On configurations that support it (all Linux configurations), it's now
262 used regardless of the --enable-add-ons switch to configure. It is no
263 longer possible to build such configurations without pthreads support.
265 * Locale names, including those obtained from environment variables (LANG
266 and the LC_* variables), are more tightly checked for proper syntax.
267 setlocale will now fail (with EINVAL) for locale names that are overly
268 long, contain slashes without starting with a slash, or contain ".." path
269 components. (CVE-2014-0475) Previously, some valid locale names were
270 silently replaced with the "C" locale when running in AT_SECURE mode
271 (e.g., in a SUID program). This is no longer necessary because of the
274 * On x86-64, the dynamic linker's lazy-binding support is now compatible
275 with application code using Intel MPX instructions. (With all previous
276 versions, the MPX register state could be clobbered when making calls
277 into or out of a shared library.) Note that while the new dynamic
278 linker is compatible with all known x86 hardware whether or not it
279 supports Intel MPX, some x86 instruction-set emulators might fail to
280 handle the new instruction encodings. This is known to affect Valgrind
281 versions up through 3.9 (but will be fixed in the forthcoming 3.10
282 release), and might affect other tools that do instruction emulation.
284 * Support for loadable gconv transliteration modules has been removed.
285 The support for transliteration modules has been non-functional for
286 over a decade, and the removal is prompted by security defects. The
287 normal gconv conversion modules are still supported. Transliteration
288 with //TRANSLIT is still possible, and the //IGNORE specifier
289 continues to be supported. (CVE-2014-5119)
291 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
292 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
293 resulting a denial-of-service security vulnerability in applications which
294 use functions related to iconv. (CVE-2014-6040)
298 * The following bugs are resolved with this release:
300 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
301 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
302 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
303 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
304 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
305 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
306 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
307 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
308 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
309 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
310 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
311 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
312 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
313 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
314 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
315 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
316 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
317 16431, 16453, 16474, 16506, 16510, 16529
319 * Slovenian translations for glibc messages have been contributed by the
320 Translation Project's Slovenian team of translators.
322 * The public headers no longer use __unused nor __block. This change is to
323 support compiling programs that are derived from BSD sources and use
324 __unused internally, and to support compiling with Clang's -fblock
325 extension which uses __block.
327 * CVE-2012-4412 The strcoll implementation caches indices and rules for
328 large collation sequences to optimize multiple passes. This cache
329 computation may overflow for large collation sequences and may cause a
330 stack or buffer overflow. This is now fixed to use a slower algorithm
331 which does not use a cache if there is an integer overflow.
333 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
334 rules for large collation sequences to optimize multiple passes and falls
335 back to alloca if malloc fails, resulting in a possible stack overflow.
336 The implementation now falls back to an uncached collation sequence lookup
339 * CVE-2013-4788 The pointer guard used for pointer mangling was not
340 initialized for static applications resulting in the security feature
341 being disabled. The pointer guard is now correctly initialized to a
342 random value for static applications. Existing static applications need
343 to be recompiled to take advantage of the fix (bug 15754).
345 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
346 to the d_name member of struct dirent, or omit the terminating NUL
347 character. (Bugzilla #14699).
349 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
350 aligned_alloc functions could allocate too few bytes or corrupt the
351 heap when passed very large allocation size values (Bugzilla #15855,
354 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
355 for AF_INET6 has been fixed (Bugzilla #16072).
357 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
358 pap_CW, quz_PE, the_NP.
360 * Substantially revised locales: gd_GB, ht_HT
362 * The LC_ADDRESS field was updated to support country_car for almost all
365 * ISO 1427 definitions were updated.
367 * ISO 3166 definitions were updated.
369 * The localedef utility now supports --big-endian and --little-endian
370 command-line options to generate locales for a different system from that
371 for which the C library was built.
373 * Binary locale files now only depend on the endianness of the system for
374 which they are generated and not on other properties of that system. As a
375 consequence, binary files generated with new localedef may be incompatible
376 with old versions of the GNU C Library, and binary files generated with
377 old localedef may be incompatible with this version of the GNU C Library,
378 in the following circumstances:
380 + Locale files may be incompatible on m68k systems.
382 + Locale archive files (but not separate files for individual locales) may
383 be incompatible on systems where plain "char" is signed.
385 * The configure option --disable-versioning has been removed. Builds with
386 --disable-versioning had not worked for several years.
388 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
389 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
391 * SystemTap probes for malloc have been introduced.
393 * SystemTap probes for slow multiple precision fallback paths of
394 transcendental functions have been introduced.
396 * Support for powerpc64le has been added.
398 * The soft-float powerpc port now supports e500 processors.
400 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
402 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
403 set of header declarations that are enabled by default, even when other
404 feature test macros or compiler options such as -std=c99 would otherwise
405 disable some of those declarations.
407 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
408 conflict with POSIX. The libbsd-compat library (which was a dummy library
409 that did nothing) has also been removed.
411 * Preliminary documentation about Multi-Thread, Async-Signal and
412 Async-Cancel Safety has been added.
414 * Change of ABI data structures for s390 and s390x:
415 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
416 allow for future hardware extensions. All library functions that accept or
417 return these structures were versioned in order to provide backwards
418 compatibility with existing code. However, not all cases can be handled
419 with interface versioning. If an application embeds either structure into
420 another structure and that structure is passed to another compilation unit
421 which expects the newer larger-sized object then any access to the new
422 fields will result in undefined behaviour. Similarly any access to fields
423 that were moved by the enlarging of the structures will cause undefined
424 behaviour. To fix the undefined behaviour all objects that are part of the
425 final in-memory image must agree on the size of structures, and this may
426 require recompilation.
430 * The following bugs are resolved with this release:
432 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
433 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
434 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
435 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
436 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
437 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
438 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
439 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
440 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
441 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
442 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
443 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
444 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
447 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
448 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
449 Distributions can re-enable building and using pt_chown via the new configure
450 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
451 considerable security risks and should only be used if the distribution
452 understands and accepts the risks.
454 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
457 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
458 fixed (Bugzilla #15330).
460 * Add support for calling C++11 thread_local object destructors on thread
461 and program exit. This needs compiler support for offloading C++11
462 destructor calls to glibc.
464 * Improved worst case performance of libm functions with double inputs and
467 * Support for priority inherited mutexes in pthread condition variables on
468 non-x86 architectures.
470 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
472 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
474 * Optimized string functions for ARM. Implemented by Will Newton and
477 * Optimized libm functions for SPARC. Implemented by David S. Miller.
479 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
482 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
483 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
485 * Added a benchmark framework to track performance of functions in glibc.
487 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
488 It is based on draft TS 18661 and currently enabled as a GNU extension.
490 * On Linux, the clock function now uses the clock_gettime system call
491 for improved precision, rather than old times system call.
493 * Added support for version-3 tz format files. This is needed when using
494 the tz database release 2013e or later, and affects a few unusual cases --
495 currently only TZ='America/Godthab' for time stamps after 2037.
497 * Added new API functions pthread_getattr_default_np and
498 pthread_setattr_default_np to get and set the default pthread
499 attributes of a process.
501 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
502 This may improve lock scaling of existing programs on TSX capable systems.
503 When the --enable-lock-elision=yes parameter is specified at configure
504 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
507 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
508 availability). Implemented by Ryan S. Arnold.
510 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
514 * The following bugs are resolved with this release:
516 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
517 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
518 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
519 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
520 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
521 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
522 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
523 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
524 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
525 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
526 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
527 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
528 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
529 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
530 14879, 14889, 14893, 14898, 14914.
532 * Optimization of memcpy for MIPS.
534 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
535 EMFILE has been fixed (Bugzilla #14889).
537 * The add-on ports collection is now distributed in the "ports" subdirectory
538 of the main GNU C Library distribution, rather than separately.
540 * Port to ARM AArch64 contributed by Linaro.
542 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
543 Optimized versions of memcpy, memset, and memcmp added for System z10 and
545 Implemented by Andreas Krebbel.
547 * The new function secure_getenv allows secure access to the environment,
548 returning NULL if running in a SUID/SGID process. This function replaces
549 the internal function __secure_getenv.
551 * SystemTap static probes have been added into the dynamic linker.
552 Implemented by Gary Benson.
554 * Optimizations of string functions strstr, strcasestr and memmem.
555 Implemented by Maxim Kuvyrkov.
557 * The minimum Linux kernel version that this version of the GNU C Library
558 can be used with is 2.6.16.
560 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
561 powerpc POWER7. Implemented by Will Schmidt.
563 * New configure option --disable-nscd builds the C library such that it
564 never attempts to contact the Name Service Caching Daemon (nscd).
565 New configure option --disable-build-nscd avoids building nscd itself;
566 this is the default if --disable-nscd is used.
568 * Improved support for cross-compilation, including cross-testing and
569 bootstrap builds without a previously built glibc.
571 * Several testsuite tests are now able to test multiple IFUNC variants of an
572 interface, rather than just testing the one that would be chooen by
575 * New configure options --with-bugurl and --with-pkgversion, for
576 distributors to use to embed their bug-reporting and package version
577 information in --help and --version output.
579 * The ttyname and ttyname_r functions on Linux now fall back to searching for
580 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
581 allows creation of chroots without the procfs mounted on /proc.
583 * The `crypt' function now fails if passed salt bytes that violate the
584 specification for those values. On Linux, the `crypt' function will
585 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
586 enabled, and fail on encrypted strings using the MD5 or DES algorithm
587 when the mode is enabled.
589 * The `clock_*' suite of functions (declared in <time.h>) is now available
590 directly in the main C library. Previously it was necessary to link with
591 -lrt to use these functions. This change has the effect that a
592 single-threaded program that uses a function such as `clock_gettime' (and
593 is not linked with -lrt) will no longer implicitly load the pthreads
594 library at runtime and so will not suffer the overheads associated with
595 multi-thread support in other code such as the C++ runtime library.
597 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
602 * The following bugs are resolved with this release:
604 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
605 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
606 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
607 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
608 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
609 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
610 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
611 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
612 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
613 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
614 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
615 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
616 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
617 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
618 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
619 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
620 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
621 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
622 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
623 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
624 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
625 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
628 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
629 configuring glibc with:
630 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
631 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
632 Implemented by H.J. Lu.
636 + define static_assert
638 + do not declare gets
640 + declare at_quick_exit and quick_exit also for ISO C11
642 + aligned_alloc. NB: The code is deliberately allows the size parameter
643 to not be a multiple of the alignment. This is a moronic requirement
644 in the standard but it is only a requirement on the caller, not the
649 + uchar.h support added
651 + CMPLX, CMPLXF, CMPLXL added
653 Implemented by Ulrich Drepper.
655 * Support for the IA-64 has been moved to ports.
657 * Remove support for anything but ELF binary format
659 * Checking versions of poll, ppoll added.
660 Implemented by Ulrich Drepper.
662 * More generic and 64-bit performance optimizations to math functions.
663 Implemented by Ulrich Drepper.
665 * New configure option --enable-obsolete-rpc makes the deprecated RPC
666 headers and functions available at compile time as they were before
667 version 2.14. This option will be removed at some time in the future
668 after the TI-RPC library becomes fully sufficient for the needs of
669 existing applications.
671 * Compatibility code for Linux kernel versions before 2.4 has been removed.
672 Note that glibc is not expected to work with any Linux kernel version
675 * New header <sys/auxv.h> and function getauxval allowing easy access to
676 the AT_* key-value pairs passed from the Linux kernel. The header also
677 defines the HWCAP_* bits associated with the AT_HWCAP key.
679 * New locales: mag_IN
681 * New configure option --enable-systemtap builds SystemTap static probes
682 into libc for setjmp and longjmp and into libpthread for various operations.
683 So far the setjmp/longjmp probes and some of the libpthread probes are
684 provided only for i*86 and x86_64.
685 Implemented by Roland McGrath and Rayson Ho.
687 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
689 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
692 * More optimized functions for SPARC. Implemented by David S. Miller.
694 * Improved support for cross-compilation, especially bootstrap builds
695 without a previously built glibc.
697 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
698 Chris Metcalf from Tilera.
700 * Support for the old ARM ABI has been removed from ports. Only the EABI is
701 now supported for ARM processors.
703 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
704 as the name of the dynamic linker, to distinguish it from the
705 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
707 * Support for CRIS has been removed from ports.
709 * A new class of installed header has been documented for low-level
710 platform-specific functionality. PowerPC added the first instance with a
711 function to provide time base register access. Contributed by Tulio
712 Magno Quites Machado Filho.
714 * ix86 configurations now install header files that are consistent with
715 what x86-64 configurations install. These same header files can be used
716 for -m32, -m64, or -mx32 builds.
717 Contributed by H.J. Lu.
719 * Math library bug fixes. A thorough audit of all open math library bugs was
720 conducted by Joseph Myers. Significant progress was made on many math
721 library bugs resulting in more accurate exceptions and function results.
722 Many thanks to all those that contributed including Andreas Jaeger for his
723 patch review and work on the x87 trigonometric instruction issues.
725 * Timezone data is no longer installed. Timezone-related binaries and scripts
726 will continue to be installed. Users should obtain their timezone data from
727 their distribution provider or from the tzdata package at
728 <ftp://munnari.oz.au/pub/>.
732 * The following bugs are resolved with this release:
734 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
735 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
736 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
737 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
738 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
739 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
740 13484, 13506, 13515, 13523, 13524, 13538, 13540
742 * New program pldd to list loaded object of a process
743 Implemented by Ulrich Drepper.
745 * Add nss_db support back to glibc. No more dependency on Berkeley db
746 and support for initgroups lookups.
747 Implemented by Ulrich Drepper.
749 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
750 Contributed by HJ Lu.
752 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
753 Contributed by HJ Lu.
755 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
756 on x86-32 and x86-64.
757 Contributed by Liubov Dmitrieva.
759 * Optimized strchr and strrchr for SSE on x86-32.
760 Contributed by Liubov Dmitrieva.
762 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
763 for x86-64 and x86-32.
764 Contributed by Liubov Dmitrieva.
766 * New interfaces: scandirat, scandirat64
767 Implemented by Ulrich Drepper.
769 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
770 Implemented by Ulrich Drepper.
772 * nscd now also caches the netgroup database.
773 Implemented by Ulrich Drepper.
775 * Integrate libm with gcc's -ffinite-math-only option.
776 Implemented by Ulrich Drepper.
778 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
779 to math functions. Implemented by Ulrich Drepper.
781 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
782 Implemented by Ulrich Drepper.
784 * New Linux interfaces: process_vm_readv, process_vm_writev
786 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
787 Implemented by Ulrich Drepper.
789 * Optimized nearbyint and strcasecmp for PPC.
790 Implemented by Adhemerval Zanella.
792 * New locales: bho_IN, unm_US, es_CU, ta_LK
796 * The following bugs are resolved with this release:
798 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
799 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
800 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
801 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
802 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
803 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
804 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
805 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
806 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
807 12795, 12811, 12813, 12814, 12841
809 * The RPC implementation in libc is obsoleted. Old programs keep working
810 but new programs cannot be linked with the routines in libc anymore.
811 Programs in need of RPC functionality must be linked against TI-RPC.
812 The TI-RPC implementation is IPv6 enabled and there are other benefits.
814 Visible changes of this change include (obviously) the inability to link
815 programs using RPC functions without referencing the TI-RPC library and the
816 removal of the RPC headers from the glibc headers.
817 Implemented by Ulrich Drepper.
819 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
820 syncfs, setns, sendmmsg
822 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
823 yue_HK, lij_IT, mhr_RU
825 * New encodings: CP770, CP771, CP772, CP773, CP774
827 * New program sotruss to trace calls through PLTs
828 Implemented by Ulrich Drepper.
830 * The malloc hook implementation is marked deprecated and will be removed
831 from the default implementation in the next version. The design never
832 worked ever since the introduction of threads. Even programs which do
833 not create threads themselves can use multiple threads created internally.
837 * The following bugs are resolved with this release:
839 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
840 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
841 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
842 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
845 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
847 * POWER7 optimizations: memset, memcmp, strncmp
849 * New optimized string functions for x86-64: strnlen (SSE2),
850 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
851 Implemented by Ulrich Drepper.
855 * The following bugs are resolved with this release:
857 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
858 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
859 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
860 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
861 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
862 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
863 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
864 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
866 * New interfaces: pthread_getname_np, pthread_setname_np
868 * New Linux interface: recvmmsg
870 * STT_GNU_IFUNC implemented for Sparc by David Miller.
872 * The dynamic linker now recognizes supported ABI versions from the
873 EI_ABIVERSION field in the ELF header.
874 Implemented by Ulrich Drepper.
876 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
877 will not be used to fill in password fields in the passwd.byname replies.
878 Instead it is used to synthesize the shadow.byname table, should it be
879 missing. This is a useful mode in some installations involving Solaris.
880 Implemented by Ulrich Drepper.
882 * New locales: kok_IN, sq_MK, cv_RU
886 * The following bugs are resolved with this release:
888 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
889 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
890 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
891 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
892 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
893 10789, 10817, 10823, 10840, 10847
895 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
897 Implemented by Ulrich Drepper.
899 * Checking version of longjmp added that fails if an uninitialized stack
900 frame would be created. Implemented by Ulrich Drepper.
902 * STT_GNU_IFUNC is now supported in static executables.
903 Implemented by H.J. Lu.
905 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
907 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
908 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
909 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
910 Contributed by H.J. Lu.
912 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
913 Implemented by Ulrich Drepper.
915 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
917 Contributed by H.J. Lu.
919 * Support for fma instruction in AVX on x86-64.
920 Implemented by H.J. Lu and Ulrich Drepper.
922 * AVX support in x86-64 auditing support in ld.so.
923 Implemented by H.J. Lu.
925 * STB_GNU_UNIQUE support added.
926 Implemented by Ulrich Drepper.
928 * Implement second fallback mode for optimized DNS lookup for even more
929 broken environments. If two requests from the same port are not
930 handled correctly close the socket and open a new one before sending
931 the second request. The 'single-request-reopen' option in /etc/resolv.conf
932 can be used to select this mode right away, instead of rediscovering the
933 necessity is every process again.
934 Implemented by Ulrich Drepper.
936 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
937 Implemented by Adam Tkac.
939 * Optimized iconv conversions for S390x.
940 Implemented by Andreas Krebbel.
942 * Using condvars with PI mutexes is now more efficient due to kernel
943 support for requeueing to PI futexes. NPTL support added for x86-64.
944 Implemented by Ulrich Drepper.
946 * New locales: ps_AF, my_MM
950 * The following bugs are resolved with this release:
952 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
953 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
954 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
955 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
956 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
958 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
959 Implemented by Ulrich Drepper.
961 * New Linux interfaces: accept4, fallocate, fallocate64.
962 Implemented by Ulrich Drepper.
964 * Correct declarations of string function when used in C++ code. This
965 could lead to compile errors for invalid C++ code.
967 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
970 * New POSIX 2008 interface: psiginfo
971 Implemented by Ulrich Drepper.
973 * New ISO C++1x interfaces: quick_exit, at_quick_exit
974 Implemented by Ulrich Drepper.
976 * Support for selecting between multiple function definitions at runtime
977 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
979 * The libcrypt library can now use the hash function implementations in
980 NSS. Implemented by Ulrich Drepper.
982 * The malloc implementation can be compiled to be less memory efficient
983 but higher performing in multi-threaded programs.
984 Implemented by Ulrich Drepper.
986 * New locales: nan_TW@latin, ks_IN
988 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
989 Implemented by Ulrich Drepper.
991 * Extended printf hook support. It is possible to use user-defined types
992 and extend existing format specifiers.
993 Implemented by Ulrich Drepper.
995 * Handling for group shadow files has been added.
996 Implemented by Ulrich Drepper.
998 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
999 servers (the case, e.g., for some people using the built-in DNS
1000 server in ADSL modems/routers). There is a once-per-process timeout
1001 in case of a broken server. To avoid it, users can run nscd or put
1002 'options single-request' in /etc/resolv.conf.
1003 Implemented by Ulrich Drepper.
1007 * The following bugs are resolved with this release:
1009 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1010 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1011 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1012 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1013 6968, 6974, 6980, 6995, 7008, 7009, 7029
1015 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1016 up at the same time. Implemented by Ulrich Drepper.
1018 * TLS descriptors for LD and GD on x86 and x86-64.
1019 Implemented by Alexandre Oliva.
1021 * getaddrinfo now handles DCCP and UDPlite.
1022 Implemented by Ulrich Drepper.
1024 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1025 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1026 Implemented by Ulrich Drepper.
1028 * New implementation of memmem, strstr, and strcasestr which is O(n).
1029 Implemented by Eric Blake.
1031 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1033 * Implement "e" option for popen to open file descriptor with the
1034 close-on-exec flag set. Implemented by Ulrich Drepper.
1036 * Implement "b" mode for fmemopen. In this mode writes writes don't
1037 implicitly add a NUL byte and seeks from the end of the buffer really
1038 use the buffer end, not the string length as the basis.
1039 Implemented by Ulrich Drepper.
1041 * Many functions, exported and internal, now atomically set the close-on-exec
1042 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1044 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1046 Implemented by Pravin Satpute.
1048 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1052 * The following bugs are resolved with this release:
1054 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1055 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1056 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1057 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1058 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1059 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1060 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1062 * New locales: bo_CN, bo_IN, shs_CA.
1064 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1066 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1067 Implemented by Pravin Satpute.
1069 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1071 * nscd caches now all timeouts for DNS entries
1072 Implemented by Ulrich Drepper.
1074 * nscd is more efficient and wakes up less often.
1075 Implemented by Ulrich Drepper.
1077 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1078 vdprintf, and obstack_vprintf.
1079 Implemented by Jakub Jelinek.
1081 * Faster memset for x86-64.
1082 Implemented by Harsha Jagasia and H.J. Lu.
1084 * Faster memcpy on x86.
1085 Implemented by Ulrich Drepper.
1087 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1088 Implemented by Ulrich Drepper.
1090 * Faster sqrt and sqrtf implemention for some PPC variants.
1091 Implemented by Steven Munroe.
1095 * The following bugs are resolved with this release:
1097 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1098 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1099 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1100 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1101 5071, 5103, 5104, 5112, 5113, 5184, 5186
1103 * More checking functions: fread, fread_unlocked, open*, mq_open.
1104 Implemented by Jakub Jelinek and Ulrich Drepper.
1106 * Extend fortification to C++. Implemented by Jakub Jelinek.
1108 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1109 by not recognizing 'a' as a modifier when those specs are requested.
1110 Implemented by Jakub Jelinek.
1112 * PPC optimizations to math and string functions.
1113 Implemented by Steven Munroe.
1115 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1116 options to be passed. Implemented by Ulrich Drepper.
1118 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1120 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1121 Implemented by Ulrich Drepper.
1123 * Handle private futexes in the NPTL implementation.
1124 Implemented by Jakub Jelinek and Ulrich Drepper.
1126 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1127 Implemented by Roland McGrath and Ulrich Drepper.
1129 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1131 * SHA-256 and SHA-512 based password encryption.
1132 Implemented by Ulrich Drepper.
1134 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1135 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1138 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1139 Implemented by Ulrich Drepper.
1143 * The following bugs are resolved with this release:
1145 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1146 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1147 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1148 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1149 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1150 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1151 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1154 * New Linux interfaces: epoll_pwait, sched_getcpu.
1156 * New generic interfaces: strerror_l.
1158 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1162 * The following bugs are resolved with this release:
1164 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1165 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1166 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1167 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1168 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1169 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1170 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1171 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1172 3225, 3251, 3252, 3253, 3273
1174 * For Linux, the sorting of addresses returned by getaddrinfo now also
1175 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1176 Implemented by Ulrich Drepper.
1178 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1179 Implemented by Ulrich Drepper.
1181 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1183 * New iconv module for MIK. Contributed by Alexander Shopov.
1185 * For sites with broken group and/or passwd database, the auto-propagate
1186 option of nscd can prevent creating ID lookup entries from the results
1187 of a name lookup and vice versa. This usually is no problem but some
1188 site might have problems with the default behavior.
1189 Implemented by Ulrich Drepper.
1191 * Iterating over entire database in NIS can be slow. With the
1192 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1193 to trade time for memory. The entire database will be read at once.
1194 Implemented by Ulrich Drepper.
1196 * The interfaces introduced in RFC 3542 have been implemented by
1199 * Support for the new ELF hash table format was added by Ulrich Drepper.
1201 * Support for priority inheritance mutexes added by Jakub Jelinek and
1204 * Support for priority protected mutexes added by Jakub Jelinek.
1206 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1207 or_IN, csb_PL, fy_NL, sr_ME.
1211 * More overflow detection functions.
1213 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1214 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1216 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1217 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1218 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1219 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1220 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1221 by Masahide Washizawa.
1223 * It is now possible to install audit libraries for the dynamic linker using
1224 LD_AUDIT. Implemented by Ulrich Drepper.
1226 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1227 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1228 For a libc and libpthread that works well on Linux 2.4 kernels, we
1229 recommend using the stable 2.3 branch.
1231 * The new function open_wmemstream acts like open_memstream,
1232 but uses a wchar_t wide character buffer.
1234 * The new function ppoll is an improved version of poll, similar to pselect.
1236 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1237 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1238 renameat, unlinkat, linkat, symlinkat, readlinkat.
1240 * New Linux kernel system calls: unshare,
1241 inotify_init, inotify_add_watch, inotify_rm_watch.
1243 * The euidaccess function is now also known by the alias eaccess,
1244 for compatibility with some other systems.
1246 * Timezone data updated to 2006b version.
1250 * The following bugs are resolved with this release:
1252 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1253 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1254 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1255 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1256 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1257 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1259 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1261 * As of this release, GCC 4 can be used to compile the C Library.
1263 * Timezone data updated to 2005m version.
1267 * The following bugs are resolved with this release:
1269 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1270 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1271 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1272 777, 787, 821, 822, 823, 825
1274 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1278 * Support for RFC 3678. Real implementations exist only for Linux so far.
1279 Implemented by Ulrich Drepper.
1281 * nscd can now cache entries persistently. Expiring entries are reloaded.
1282 For speedups the cache can be shared in memory with client processes.
1283 Implemented by Ulrich Drepper.
1285 * nscd can now perform SELinux checks.
1286 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1288 * getaddrinfo queries are now cached. Canonical name lookup is performed
1290 Implemented by Ulrich Drepper.
1292 * The nothrow function attribute is used when headers are used by gcc when
1293 compiling C code. This can avoid significant amounts of exception
1296 * The malloc functions perform more error checking and are stricter when
1297 it comes to reacting on errors. The default action is to terminate
1298 the process after showing an error message. Implemented by Ulrich Drepper.
1300 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1301 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1303 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1304 namespaces using the new function dlmopen(). This feature is of course,
1305 like most other dynamic loading functionality, not available in statically
1306 linked applications. Implemented by Ulrich Drepper.
1308 * Low-overhead boundary checking variants of string and some stdio functions
1309 were added. These are to be used in conjunction with a gcc patch by
1310 Jakub Jelinek which adds calls to these functions if possible.
1311 Implemented by Jakub Jelinek and Ulrich Drepper.
1313 * Old code for several operating systems and machine architectures that
1314 have not been in working condition in a long time have been removed from
1315 the main source tree maintained by the GNU C Library's maintainers.
1316 These files are now reside in the separate `ports' source module
1317 that is usable as an add-on when building the library.
1321 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1322 interrogate the dynamic linker, compatible with the Solaris interface.
1324 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1325 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1327 * getifaddrs now uses the netlink interface on Linux to get its information.
1328 Implemented by Thorsten Kukuk.
1330 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1331 Implemented by Ulrich Drepper.
1333 * support for non-executable stacks on x86 has been added. Changes mostly
1336 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1339 * getaddrinfo now performs destination address selection according to
1344 * Thread-safe interfaces for many functions that access locale data
1345 were added in version 2.3, but these features were omitted from NEWS.
1346 Many functions have variants with an `_l' suffix that take a `locale_t'
1347 object as a parameter rather than consulting the current locale.
1348 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1349 create and maintain `locale_t' objects. Additionally, the new function
1350 `uselocale' sets "the current locale" (as used by functions not so
1351 parameterized) set for an individual thread. These features were added
1352 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1354 * The functions getresuid, getresgid, setresuid, and setresgid, which
1355 have long been available on Linux, are now declared in <unistd.h>
1356 and are now also available on the Hurd.
1358 * ELF thread-local storage support (TLS) now works on x86-64.
1360 * The new dynamic string token $LIB is expanded in shared library names.
1361 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1363 * Aldy Hernandez contributed complete software floating point support for
1364 PowerPC machines with no FPU.
1366 * fexecve is implemented on Linux.
1368 * The `btowc' function should work at least twice as fast due to
1369 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1371 * With approriate thread add-ons cancelable functions are now implemented
1372 in libc.so as well. No need to call the function in libpthread. This
1373 change allowed to finally disable the incorrect and expensive handling
1374 of weak definition in ld.so.
1376 * Yet more PLT entries in libc.so have been removed. We finally arrived
1377 at the bare minimum. Startup times improved appropriately.
1379 * Support for the new Linux/x86 system call interface was added. The
1380 AT_SYSINFO auxiliary vector entry is recognized and handled.
1384 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1387 * iconv (the program and the interface) now accepts empty names (excluding
1388 options like //TRANSLIT) to mean "use charset of current locale".
1390 * localedef can now transliterate characters in strings which are not in
1391 the provided charmap. The information from the input locale is used.
1393 * Prelinking support was added for ELF targets. This requires additional
1394 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1396 * Read-only stdio streams now use mmap to speed up operation by eliminating
1397 copying and buffer underflows. To use add 'm' to the mode string of
1398 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1400 * The malloc functions were completely rewritten by Wolfram Gloger based
1401 on Doug Lea's malloc-2.7.0.c.
1403 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1404 implementation of regex.
1406 * Bruno Haible upgraded the iconv and locale implementation to support
1409 * Contents of the LC_* and LANG environment variables in the CEN style are
1410 not recognized anymore. It never was used. Change by Ulrich Drepper.
1412 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1413 thread-local storage (TLS) ABI on some platforms.
1414 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1416 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1417 EUC-JISX0213, and TSCII.
1419 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1420 BSD-compatible interface for getting all network interface addresses.
1421 Implementation for IPv4 by Roland McGrath.
1423 * Loading of locale data is faster due to the introduction of a locale
1424 archive. Implemented by Roland McGrath and Ulrich Drepper.
1426 * Startup times are significantly reduced by not using exported functions
1427 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1430 * Steven Munroe contributed a port to PowerPC64/Linux.
1434 * The Hurd now uses the GNU libio implementation of stdio rather than the
1435 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1437 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1438 with the same behavior as the Linux system call of the same name.
1442 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1443 128-bit long double format.
1445 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1446 IBM1161, and IBM1162 charsets.
1448 * Andreas Jaeger contributed a port to x86-64/Linux.
1450 * Peter Bruin contributed a port to PowerPC/Hurd.
1452 * libc functions using I/O streams now can handle wide-oriented streams
1455 * optimizations in the dynamic linker. Binaries created by recent binutils
1456 versions start up quicker due to reduced time spent on relocations.
1458 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1462 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1463 asinh, atanh, j0 for the 128-bit long double format.
1465 * Bruno Haible updated all the code handling Unicode in some form to
1466 support Unicode 3.1.
1468 * Speed of regex for single-byte locales is back to previous levels.
1469 Patch by Isamu Hasegawa.
1471 * Alpha, SPARC, and IA-64 now also using floating stacks.
1473 * Startup time of internationalized applications greatly improved through
1474 iconv cache. Use iconvconfig to generate the cache file.
1475 Contributed by Ulrich Drepper.
1477 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1478 severe performance problems. Patch by David Mosberger.
1480 * The Hurd port got a lot more functionality like AIO, various stdio
1481 extensions, etc. Mainly done by Roland McGrath.
1483 * mtrace can now lookup symbols in shared libraries.
1487 * Intel's IA-64 math library is largely integrated. It provides fast and
1488 accurate implementatations for most basic and standard math functions
1489 in float, double, and long double format.
1491 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1492 and asin for the 96-bit long double format and asin, log, tan for the
1493 128-bit long double format.
1495 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1496 The basic double functions exist today. Contributed by Abraham Ziv
1497 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1498 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1500 * An asynchronous name lookup library was added. The interface is designed
1501 after POSIX AIO. The proposal was circulated beforehand to get comments.
1502 No negative ones came in. Implemented by Ulrich Drepper.
1504 * Port to S390/64bit contributed by Martin Schwidefsky
1505 <schwidefsky@de.ibm.com>.
1507 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1508 of functions for Linux/IA-64.
1510 * The RPC code is now thread safe. Threads can now use the same service
1511 of different services at the same time. Patch by Eric Norum
1512 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1514 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1515 family of functions for Linux/S390.
1517 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1518 of functions for Linux/x86.
1520 * Port to Linux/CRIS contributed by Axis Communications.
1524 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1525 we can now check for namespace violations and missing declarations. The
1526 result is that almost all headers are now Unix-compliant (as defined in
1527 the upcoming XPG6). The negative side is that some programs might need
1528 corrections, too, if they depend on the incorrect form of the headers in
1529 previous versions which defined too many symbols and included too many
1532 * regex now handles multibyte character sets correctly.
1533 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1535 * iconv (the program) does now conform to the upcoming XPG6 and handles
1536 charmaps. Instead of the charset names the path of charmaps can be
1537 provided and the conversion happens based on this data.
1538 Contributed by Ulrich Drepper.
1540 * The locale program now provides detailed information about the installed
1545 only lists the names of the supported locales
1549 provides details such as country, language, and codeset name.
1550 Contributed by Ulrich Drepper.
1554 * The gencat program now parses the input file according to the charset
1555 selected by the LC_CTYPE category. This is important for stateful
1556 character sets. To make generating catalogs easier there is a way
1557 to overwrite the charset selected by the locale: before the first
1558 message or $ quote line the catalog can contain a line like
1560 $ codeset=ISO-8859-2
1562 to select the charset (ISO-8859-2 in this case).
1564 Implemented by Shinya Hanataka and Ulrich Drepper.
1566 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1567 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1568 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1570 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1571 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1573 * The LANGUAGE environment variable is now ignored unless the locale is
1574 changed from the default "C" locale.
1576 * The usual bug fixes.
1580 * Greg McGary added runtime support for bounds checking using gcc's
1581 new -fbounded-pointers option. ix86 target is complete. PowerPC
1584 * Thorsten Kukuk added secure mode support to nscd.
1586 * The Berkeley db libraries have been removed.
1588 Related, the nss_db module is now in a separate package since it
1589 obviously requires a database library being available.
1591 * Wide character I/O streams implemented by Ulrich Drepper.
1593 * Functions from the extended socket API added by Ulrich Drepper.
1595 * Functions feenableexcept and fedisableexcept to control the
1596 behaviour of individual exceptions have been added by Andreas Jaeger.
1598 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1600 * The resolver code has been updated from bind 8.2.3-T5B which supports
1601 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1604 This change could in some situations effect backward compatibility. Since
1605 now `_res' is a thread-local instead of a global variable, modifying it
1606 in one thread does not have any effect in other threads.
1608 The resolver library was also extended to allow IPv6 as the transport
1609 protocol for the requests. This work was done by Stig Venaas.
1611 * Compatibility code for K&R C compilers has been removed from the
1612 header files. A ISO C compiler is needed to use the library
1613 (conforming to either C89 or C99 standard).
1615 * Complete rewrite of the localedef program to support multibyte character
1616 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1617 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1618 Implemented by Ulrich Drepper.
1620 Bruno Haible significantly improved the generation and use of the data
1621 structures for the wide character tables.
1623 * Plural handling in gettext implemented by Ulrich Drepper.
1625 * The utmp daemon has been removed.
1627 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1629 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1632 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1634 * POSIX barriers implemented by Kaz Kylheku.
1636 * POSIX spawn function family implemented by Ulrich Drepper.
1638 * POSIX spinlocks are now available.
1640 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1642 * the configure option --enable-kernel=X.Y.Z allows to strip out
1643 compatibility for kernel versions before X.Y.Z. This is currently only
1644 implemented for Linux.
1646 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1647 field sin6_scope_id. This means that all programs using IPv6 should be
1648 recompiled. Don't expect binary compatibility with previous glibc
1651 * various conversion modules for IBM character sets contributed by
1654 * IA-64 port by Jes Sorensen and HJ Lu.
1668 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1670 * New xdr functions are added; some rpc functions are now 64bit clean.
1672 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1674 * Fixed known incompatibilities with glibc 2.0.
1676 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1678 * Optimized a number of functions (especially the ELF dynamic loader).
1680 * Update timezone data files.
1682 * lots of charmaps corrections
1684 * some new locale definitions and charmaps
1689 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1690 conform to POSIX member type requirements. Symbol versions have been
1691 adjusted as needed within the library, and for direct use by applications,
1692 but there is potential for problems if third-party libraries use
1693 struct timeval as part of their interface. This does not present
1694 a problem for X and other "essential" system libraries.
1696 * An additional locale model to support C++ Standard Library locale
1697 model and probably more was implemented by Ulrich Drepper.
1699 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1702 * Miles Bader provided the `argp' function family to support hierachical
1703 command line argument parsing, layered on top of getopt.
1705 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1707 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1710 * scanf recognizes the %a and %A format for scanning floating point numbers.
1712 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1713 information and interfaces for the available integer types.
1715 * about 130 new math functions were added to implement the ISO C9x math
1718 * the new header <complex.h> contains definitions of the complex math
1719 functions from ISO C 9X.
1721 * the new header <tgmath.h> defines generic macros to use complex or
1722 real valued functions.
1724 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1726 * Andreas Jaeger provided a test suite for the math library.
1728 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1730 * Ulrich Drepper added character set conversion functions (iconv).
1732 * Optimized string functions have been added.
1734 * The localedata addon is now part of glibc.
1736 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1738 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1739 daemon for NSS (nscd).
1741 Missing a better place here are some numbers on improvements. Under
1742 Linux 2.1.125 un-tar-ing the kernel sources takes
1746 using local files 12.19s 6.88s 22.91s
1748 using NIS 13.92s 8.91s 26.34s
1750 using NIS & nscd 10.37s 7.34s 25.30s
1752 using NIS+ 27.57s 30.37s 640.46s
1754 using NIS+ & nscd 10.25s 7.83s 26.51s
1756 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1758 Keep in mind that non-namelookup related operations dominate above times.
1759 It was just a common complain that using NIS+ unpacking the kernel is
1762 [1] The old nscd implementation is not available anymore since it was
1763 distributed with glibc up to version 2.0.98 and thus is now replaced.
1765 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1767 * Mark Kettenis provided a Hesiod NSS module.
1769 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1770 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1772 * rcmd can now handle netgroups (Dick Streefland).
1774 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1777 * Support for the IPv6 protocol has been added to the socket API, as per the
1778 latest draft standards.
1780 * Support for Linux 2.2 has been added.
1782 * Interface changes relative to the latest 2.0.x release:
1783 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1784 addseverity NEW: Unix98
1785 alphasort64 NEW: LFS
1786 argp_err_exit_status NEW: argp, GNU ext
1787 argp_error NEW: argp, GNU ext
1788 argp_failure NEW: argp, GNU ext
1789 argp_help NEW: argp, GNU ext
1790 argp_parse NEW: argp, GNU ext
1791 argp_program_bug_address NEW: argp, GNU ext
1792 argp_program_version NEW: argp, GNU ext
1793 argp_program_version_hook NEW: argp, GNU ext
1794 argp_state_help NEW: argp, GNU ext
1795 argp_usage NEW: argp, GNU ext
1796 authdes_create NEW: Secure RPC
1797 authdes_getucred NEW: Secure RPC
1798 authdes_pk_create NEW: Secure RPC
1799 backtrace NEW: GNU ext.
1800 backtrace_symbols NEW: GNU ext.
1801 backtrace_symbols_fd NEW: GNU ext.
1803 cacosf NEW: ISO C 9x
1804 cacosh NEW: ISO C 9x
1805 cacoshf NEW: ISO C 9x
1806 cacoshl NEW: ISO C 9x
1807 cacosl NEW: ISO C 9x
1814 casinf NEW: ISO C 9x
1815 casinh NEW: ISO C 9x
1816 casinhf NEW: ISO C 9x
1817 casinhl NEW: ISO C 9x
1818 casinl NEW: ISO C 9x
1820 catanf NEW: ISO C 9x
1821 catanh NEW: ISO C 9x
1822 catanhf NEW: ISO C 9x
1823 catanhl NEW: ISO C 9x
1824 catanl NEW: ISO C 9x
1825 cbc_crypt NEW: Secure RPC
1829 ccoshf NEW: ISO C 9x
1830 ccoshl NEW: ISO C 9x
1836 cimagf NEW: ISO C 9x
1837 cimagl NEW: ISO C 9x
1838 clearerr_locked REMOVED
1839 clntunix_create NEW: sunrpc ext
1841 clog10 NEW: ISO C 9x
1842 clog10f NEW: ISO C 9x
1843 clog10l NEW: ISO C 9x
1853 cprojf NEW: ISO C 9x
1854 cprojl NEW: ISO C 9x
1856 crealf NEW: ISO C 9x
1857 creall NEW: ISO C 9x
1862 csinhf NEW: ISO C 9x
1863 csinhl NEW: ISO C 9x
1866 csqrtf NEW: ISO C 9x
1867 csqrtl NEW: ISO C 9x
1871 ctanhf NEW: ISO C 9x
1872 ctanhl NEW: ISO C 9x
1874 des_setparity NEW: Secure RPC
1875 ecb_crypt NEW: Secure RPC
1876 endutxent NEW: Unix98
1878 exp10f NEW: ISO C 9x
1879 exp10l NEW: ISO C 9x
1883 fattach NEW: STREAMS
1884 fdetach NEW: STREAMS
1888 feclearexcept NEW: ISO C 9x
1889 fegetenv NEW: ISO C 9x
1890 fegetexceptflag NEW: ISO C 9x
1891 fegetround NEW: ISO C 9x
1892 feholdexcept NEW: ISO C 9x
1894 feraiseexcept NEW: ISO C 9x
1895 ferror_locked REMOVED
1896 fesetenv NEW: ISO C 9x
1897 fesetexceptflag NEW: ISO C 9x
1898 fesetround NEW: ISO C 9x
1899 fetestexcept NEW: ISO C 9x
1900 feupdateenv NEW: ISO C 9x
1901 fflush_locked REMOVED
1905 fgets_unlocked NEW: GNU ext.
1906 fileno_locked REMOVED
1918 fputc_locked REMOVED
1919 fputs_unlocked NEW: GNU ext.
1920 fread_unlocked NEW: GNU ext.
1925 fstatvfs NEW: Unix98
1929 ftruncate64 NEW: LFS
1931 fwrite_unlocked NEW: GNU ext.
1932 gai_strerror NEW: IPv6
1936 getchar_locked REMOVED
1938 getdate_err NEW: Unix98
1939 getdate_r NEW: GNU ext.
1941 getnameinfo NEW: IPv6
1942 getnetname NEW: Secure RPC
1943 getpmsg NEW: STREAMS
1944 getpt NEW: Unix98 PTY
1945 getrlimit64 NEW: LFS
1946 getutxent NEW: Unix98
1947 getutxid NEW: Unix98
1948 getutxline NEW: Unix98
1949 glob64 NEW: GNU ext.
1950 globfree64 NEW: GNU ext.
1951 gnu_get_libc_release NEW: GNU ext.
1952 gnu_get_libc_version NEW: GNU ext.
1953 grantpt NEW: Unix98 PTY
1954 host2netname NEW: Secure RPC
1956 iconv_close NEW: iconv
1957 iconv_open NEW: iconv
1958 if_freenameindex NEW: IPv6
1959 if_indextoname NEW: IPv6
1960 if_nameindex NEW: IPv6
1961 if_nametoindex NEW: IPv6
1962 in6addr_any NEW: IPv6
1963 in6addr_loopback NEW: IPv6
1964 inet6_isipv4mapped NEW: IPv6
1965 isastream NEW: STREAMS
1966 iswblank NEW: GNU ext.
1967 key_decryptsession NEW: Secure RPC
1968 key_decryptsession_pk NEW: Secure RPC
1969 key_encryptsession NEW: Secure RPC
1970 key_encryptsession_pk NEW: Secure RPC
1971 key_gendes NEW: Secure RPC
1972 key_get_conv NEW: Secure RPC
1973 key_secretkey_is_set NEW: Secure RPC
1974 key_setnet NEW: Secure RPC
1975 key_setsecret NEW: Secure RPC
1976 llrint NEW: ISO C 9x
1977 llrintf NEW: ISO C 9x
1978 llrintl NEW: ISO C 9x
1979 llround NEW: ISO C 9x
1980 llroundf NEW: ISO C 9x
1981 llroundl NEW: ISO C 9x
1986 lrintf NEW: ISO C 9x
1987 lrintl NEW: ISO C 9x
1988 lround NEW: ISO C 9x
1989 lroundf NEW: ISO C 9x
1990 lroundl NEW: ISO C 9x
1992 makecontext NEW: Unix98
1993 mempcpy NEW: GNU ext.
1996 modify_ldt NEW: kernel
2000 nearbyint NEW: ISO C 9x
2001 nearbyintf NEW: ISO C 9x
2002 nearbyintl NEW: ISO C 9x
2003 netname2host NEW: Secure RPC
2004 netname2user NEW: Secure RPC
2005 nexttoward NEW: ISO C 9x
2006 nexttowardf NEW: ISO C 9x
2007 nexttowardl NEW: ISO C 9x
2011 passwd2des NEW: Secure RPC
2013 pow10f NEW: GNU ext.
2014 pow10l NEW: GNU ext.
2017 printf_size NEW: GNU ext.
2018 printf_size_info NEW: GNU ext.
2019 profil_counter REMOVED
2020 pthread_mutexattr_getkind_np REPLACED
2021 pthread_mutexattr_setkind_np REPLACED
2022 ptsname NEW: Unix98 PTY
2023 ptsname_r NEW: Unix98 PTY
2025 putchar_locked REMOVED
2026 putgrent NEW: GNU ext.
2028 putpmsg NEW: STREAMS
2029 pututxline NEW: Unix98
2033 readdir64_r NEW: LFS
2034 remquo NEW: ISO C 9x
2035 remquof NEW: ISO C 9x
2036 remquol NEW: ISO C 9x
2038 roundf NEW: ISO C 9x
2039 roundl NEW: ISO C 9x
2041 scalbln NEW: ISO C 9x
2042 scalblnf NEW: ISO C 9x
2043 scalblnl NEW: ISO C 9x
2045 sendfile NEW: kernel
2046 setcontext NEW: Unix98
2047 setrlimit64 NEW: LFS
2048 setutxent NEW: Unix98
2050 sigignore NEW: Unix98
2051 sigqueue NEW: POSIX.1b
2052 sigrelse NEW: Unix98
2053 sigset NEW: POSIX.1b
2054 sigtimedwait NEW: POSIX.1b
2055 sigwaitinfo NEW: POSIX.1b
2056 sincos NEW: GNU ext.
2057 sincosf NEW: GNU ext.
2058 sincosl NEW: GNU ext.
2062 strcasestr NEW: GNU ext.
2063 strtoimax NEW: ISO C 9x
2064 strtoumax NEW: ISO C 9x
2065 strverscmp NEW: GNU ext.
2066 svcauthdes_stats NEW: Secure RPC
2067 svcunix_create NEW: sunrpc etx
2068 svcunixfd_create NEW: sunrpc ext
2069 swapcontext NEW: Unix98
2070 tcgetsid NEW: Unix98 PTY
2071 tdestroy NEW: GNU ext.
2072 tgamma NEW: ISO C 9x
2073 tgammaf NEW: ISO C 9x
2074 tgammal NEW: ISO C 9x
2078 truncf NEW: ISO C 9x
2079 truncl NEW: ISO C 9x
2081 unlockpt NEW: Unix98 PTY
2082 updwtmpx NEW: Unix98
2083 user2netname NEW: Secure RPC
2084 utmpxname NEW: Unix98
2085 versionsort NEW: GNU ext.
2086 versionsort64 NEW: GNU ext.
2088 wcscasecmp NEW: GNU ext.
2089 wcsncasecmp NEW: GNU ext.
2090 wcsnlen NEW: GNU ext.
2091 wcstoimax NEW: ISO C 9x
2092 wcstoll NEW: ISO C 9x
2093 wcstoull NEW: ISO C 9x
2094 wcstoumax NEW: ISO C 9x
2096 wordexp NEW: POSIX.2
2097 wordfree NEW: POSIX.2
2098 write_profiling REMOVED
2099 xdecrypt NEW: Secure RPC
2100 xdr_authdes_cred NEW: Secure RPC
2101 xdr_authdes_verf NEW: Secure RPC
2102 xdr_cryptkeyarg NEW: Secure RPC
2103 xdr_cryptkeyarg2 NEW: Secure RPC
2104 xdr_cryptkeyres NEW: Secure RPC
2105 xdr_getcredres NEW: Secure RPC
2106 xdr_key_netstarg NEW: Secure RPC
2107 xdr_key_netstres NEW: Secure RPC
2108 xdr_keybuf NEW: Secure RPC
2109 xdr_keystatus NEW: Secure RPC
2110 xdr_netnamestr NEW: Secure RPC
2111 xdr_sizeof NEW: Secure RPC
2112 xdr_unixcred NEW: sunrpc ext
2113 xencrypt NEW: Secure RPC
2114 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2125 * inet_ntoa is thread-safe
2127 * updwtmp is moved from libutil to libc
2129 * rewrite of cbrt function
2131 * update of timezone data
2145 * add atoll function
2147 * fix complex problems in Berkeley DB code
2149 * fix math functions
2153 * fixed lots of header problems (especially Linux/GNU specific)
2155 * dynamic loader preserves all registers
2157 * Roland McGrath provided support for handling of auxiliary objects in
2158 the ELF dynamic loader.
2160 * support for parallel builds is improved
2164 * GNU extensions are no longer declared by default. To enable them you
2165 must define the macro `_GNU_SOURCE' in your program or compile with
2168 * The library has changed from using GNU ld symbol aliases to using weak
2169 symbols where available. The ELF object file format supports weak
2170 symbols; GNU ld also supports weak symbols in the a.out format. (There
2171 is also now support for other GNU ld extensions in ELF. Use the
2172 `--with-elf' option to configure to indicate you have ELF, and
2173 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2174 of many files which contained only symbol aliases, reducing the size of
2175 the source and the compiled library; many other files were renamed to
2176 less cryptic names previously occupied by the symbol alias files.
2177 There is a new header file <elf.h> for programs which operate on
2178 files in the ELF format.
2180 * Converted to Autoconf version 2, so `configure' has more options.
2181 Run `configure --help' to see the details.
2183 * The library can now be configured to build profiling, highly-optimized
2184 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2185 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2186 `configure' enable building these extra libraries. The shared library is
2187 built by default when using both ELF and GNU ld. When shared libraries
2188 are enabled, the new library `-ldl' is available for arbitrary run-time
2189 loading of shared objects; its interface is defined in <dlfcn.h>. The
2190 new header file <link.h> gives access to the internals of the run-time
2191 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2192 application of same name on other systems and it provides information
2193 about dynamically linked binaries.
2195 * The C library now provides the run-time support code for profiling
2196 executables compiled with `-pg'. Programs can control the profiling code
2197 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2198 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2199 the support for this file format was contributed by David Mosberger-Tang.
2201 * The math code has been replaced with a math library based on fdlibm from
2202 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2203 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2204 functions. The math functions now reside in a separate library, so
2205 programs using them will need to use `-lm' their linking commands.
2207 * John C. Bowman contributed optimized ix87 assembler inline functions.
2209 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2210 mechanism similar to that found in Solaris 2. This is now used for the
2211 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2212 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2213 file controls what services are used for each individual database. This
2214 works by loading shared libraries with names specified in `nsswitch.conf',
2215 so service modules can be changed or added at any time without even
2216 relinking any program. Currently there are the file, db, and NIS based
2217 NSS services available.
2219 * The new functions `strtoq' and `strtouq' parse integer values from
2220 strings, like `strtol' and `strtoul', but they return `long long int' and
2221 `unsigned long long int' values, respectively (64-bit quantities).
2223 * The new functions `strtof' and `strtold' parse floating-point values from
2224 strings, like `strtod', but they return `float' and `long double' values,
2225 respectively (on some machines `double' and `long double' are the same).
2227 * Ulrich Drepper has contributed new implementations of the floating-point
2228 printing and reading code used in the `printf' family of functions and
2229 `strtod', `strtof', and `strtold'. These new functions are perfectly
2230 accurate, and much faster than the old ones.
2232 * The implementation of the POSIX locale model was completely rewritten by
2233 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2234 to compile the POSIX locale definition.
2236 * The former dummy implementations of the strcoll and strxfrm function are
2237 now replaced by fully functional code contributed by Ulrich Drepper. The
2238 collation information comes from the POSIX locale definitions.
2240 * The new header <langinfo.h> defines an interface for accessing
2241 various locale-dependent data (using the locale chosen with `setlocale').
2243 * Ulrich Drepper has contributed a new suite of functions for operation on
2244 wide-character and multibyte-character strings, in <wchar.h>;
2245 and classification and case conversion of wide characters, in <wctype.h>.
2246 These new functions are conforming to the ISO C, Amendement 1 specification.
2248 * There is now a second implementation of the standard I/O library available.
2249 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2250 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2252 * You can now use positional parameter specifications in format strings
2253 for the `printf' and `scanf' families of functions. For example,
2254 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2255 ``Number 6, Mr Jones''. This is mainly useful when providing different
2256 format strings for different languages, whose grammars may dictate
2257 different orderings of the values being printed. To support this
2258 feature, the interface for `register_printf_handler' has changed; see
2259 the header file <printf.h> for details.
2261 * The `printf' and `scanf' families of functions now understand a new
2262 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2263 to group numbers as indicated by the locale; for `scanf' and friends, this
2264 says to accept as valid only a number with all the proper grouping
2265 separators in the right places. In the default "C" locale, numbers are
2266 not grouped; but locales for specific countries will define the usual
2267 conventions (i.e. separate thousands with `,' in the US locale).
2269 * The pgrp functions have been regularized, slightly incompatibly but much
2270 less confusingly. The core functions are now `getpgid' and `setpgid',
2271 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2272 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2273 provided for compatibility. There is no longer an incompatible `getpgrp'
2274 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2276 * The new header file <fts.h> and suite of functions simplify programs that
2277 operate on directory trees. This code comes from 4.4 BSD.
2279 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2280 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2281 NSS scheme used in glibc.
2283 * There is a new malloc debugging hook `__memalign_hook'.
2285 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2286 `unsigned int' in <sys/types.h>. These are for compatibility only and
2287 their use is discouraged.
2289 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2290 done differently, so that it works even without GNU ld.
2292 * New function `euidaccess' checks allowed access to a file like `access',
2293 but using the effective IDs instead of the real IDs.
2295 * The time zone data files have been updated for the latest and greatest
2296 local time conventions of the countries of the world.
2298 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2301 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2302 for formatting floating-point numbers. They are provided only for
2303 compatibility; new programs should use `sprintf' instead. There are
2304 also equivalent function for the `long double' floating-point type and
2305 all functions also exist in a reentrant form.
2307 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2308 functions for maintaining the login-record files (primarily of use to
2309 system programs such as `login'), and convenient functions for
2310 allocating and initializing a pseudo-terminal (pty) device.
2312 * Ulrich Drepper has contributed new support for System V style
2313 shared memory and IPC on systems that support it.
2315 * Ulrich Drepper has contributed several miscellaneous new functions found
2316 in System V: The `hsearch' family of functions provide an effective
2317 implementation of hash tables; `a64l' and `l64a' provide a very simple
2318 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2321 * Ulrich Drepper has contributed new reentrant counterparts for the
2322 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2324 * Ulrich Drepper has contributed new, highly-optimized versions of several
2325 string functions for the i486/Pentium family of processors.
2327 * Ulrich Drepper has updated the Linux-specific code, based largely
2328 on work done in Hongjiu Lu's version of GNU libc for Linux.
2329 The GNU library now supports Linux versions 2.0.10 and later,
2330 using the ELF object file format (i[3456]86-*-linux).
2332 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2334 * David Mosberger-Tang and Richard Henderson have ported the C library
2335 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2336 dynamic linking support for ELF/Alpha.
2338 * Richard Henderson contributed several Alpha optimized assembler function
2339 for arithmetic and string handling.
2341 * Ulrich Drepper has contributed a new set of message catalog functions to
2342 support multiple languages using the <libintl.h> interface, for use with
2343 his new package GNU gettext. Translation volunteers have contributed
2344 catalogs of the library's messages in Spanish, German, and Korean.
2346 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2347 program and the `catgets' function for reading the catalog files it
2348 creates. (The <libintl.h> interface is preferred; we include the
2349 <nl_types.h> interface using `catgets' only for source compatibility with
2350 programs already written to use it.)
2352 * New header file <values.h> gives SVID-compatible names for <limits.h>
2355 * Various new macros, declarations, and small header files for compatibility
2358 * New function `group_member' is a convenient way to check if a process has
2359 a given effective group ID.
2361 * When using GCC 2.7 and later, the socket functions are now declared in a
2362 special way so that passing an argument of type `struct sockaddr_in *',
2363 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2364 `struct sockaddr *' type, does not generate a type-clash warning.
2366 * New function `error' declared in header file <error.h> is a convenient
2367 function for printing error messages and optionally exiting; this is the
2368 canonical function used in GNU programs. The new functions `err', `warn',
2369 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2370 doing the same thing.
2372 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2373 POSIX.2 `glob' function to do ~ and {...} expansion.
2375 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2376 `clearenv' which is used in POSIX.9 is also available.
2378 * New function `getsid' returns session ID number on systems that support it.
2380 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2381 files <db.h> and <mpool.h> provide a rich set of functions for several
2382 types of simple databases stored in memory and in files, and <ndbm.h> is
2383 an old `ndbm'-compatible interface using the `db' functions. Link with
2384 `-ldb' to get these functions.
2386 * New macro `strdupa' copies a string like `strdup', but uses local stack
2387 space from `alloca' instead of dynamic heap space from `malloc'.
2389 * New function `strnlen' is like `strlen' but searches only a given maximum
2390 number of characters for the null terminator. `stpncpy', `strndup' and
2391 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2394 * New function `statfs' in header <sys/statfs.h>.
2396 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2397 provide convenient functions for operating on blocks of null-terminated
2400 * A new suite of functions in <utmp.h> handle all the details of reading
2401 and writing the utmp file.
2403 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2406 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2407 completely POSIX compliant and also implemented the extended functionality
2408 to handle alternate digit representation and alternate era date formats.
2410 * Ulrich Drepper provided an implementation of the `strptime' function
2411 defined in XPG4.2 which transforms a string into a `struct tm' value.
2413 * Paul Eggert provided the tzselect shell script as part of the timezone
2414 code. The shell script makes it easy to select the correct timezone
2417 * The implementation of the malloc family of functions is completely replaced
2418 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2419 The implementation uses the mmap function (if available) and it is
2420 optimized for the use in multi threaded programs.
2422 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2423 functions. This new functionality is usable by specifying a special
2424 salt string and it is compatible with implementation on *BSD systems.
2426 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2427 `getsubopt' to handle second level command line options, `bsd_signal'
2428 to access BSD style `signal' functionality, the obsolete `regexp' style
2431 * the `lchown' function is available on system which support this
2434 * The implementation of the shadow password handling function was contributed
2437 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2439 * POSIX.1g support was added. The <sys/select.h> header is available,
2440 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2441 implementation of `getaddrinfo'.
2445 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2447 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2448 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2450 * The new function `daemon' from 4.4 BSD is useful for server programs that
2451 want to put themselves in the background.
2453 * Joel Sherrill has contributed support for several standalone boards that
2454 run without an operating system.
2456 * `printf', `scanf' and friends now accept a `q' type modifier for long
2457 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2459 * All of the code taken from BSD (notably most of the math and networking
2460 routines) has been updated from the BSD 4.4-Lite release.
2462 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2464 * The new functions `getdomainname' and `setdomainname' fetch or change the
2465 YP/NIS domain name. These are system calls which exist on systems which
2468 * The time zone data files have been updated for the latest international
2471 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2472 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2476 * The C library now includes support for Sun RPC, from Sun's free
2477 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2478 are included. (There is still no support for YP.)
2480 * Tom Quinn has contributed a port of the C library to SGI machines running
2481 Irix 4 (mips-sgi-irix4).
2483 * The new `lockf' function is a simplified interface to the locking
2484 facilities of `fcntl', included for compatibility.
2486 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2488 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2490 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2493 * The error message printed by `assert' for a failed assertion now includes
2494 the name of the program (if using GNU ld) and the name of the calling
2495 function (with versions of GCC that support this).
2497 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2499 * The library now includes the <sys/mman.h> header file and memory
2500 management functions `mmap', `munmap', `mprotect', `msync', and
2501 `madvise', on systems that support those facilities.
2503 * The interface for `mcheck' has changed slightly: the function called to
2504 abort the program when an allocation inconsistency is detected now takes
2505 an argument that indicates the type of failure. The new function
2506 `mprobe' lets you request a consistency check for a particular block at
2507 any time (checks are normally done only when you call `free' or `realloc'
2510 * It is now possible to easily cross-compile the C library, building on one
2511 system a library to run on another machine and/or operating system. All
2512 you need to do is set the variable `HOST_CC' in `configparms' to the
2513 native compiler for programs to run on the machine you are building on (a
2514 few generator programs are used on Unix systems); set `CC' to the
2517 * The new function `fexecve' (only implemented on the GNU system) executes
2518 a program file given a file descriptor already open on the file.
2522 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2523 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2525 * You can set the variable `libprefix' in `configparms' to specify a prefix
2526 to be prepended to installed library files; this makes it easy to install
2527 the GNU C library to be linked as `-lgnuc' or whatever.
2529 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2530 copies a limited number of characters from a string, and returns the
2531 address of the last character written.
2533 * You no longer need to check for whether the installed `stddef.h' is
2534 compatible with the GNU C library. configure now checks for you.
2536 * You can now define a per-stream `fileno' function to convert the
2537 stream's cookie into an integral file descriptor.
2539 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2540 allocates zero bytes of storage, and returns a unique pointer which
2541 you can pass to `realloc' or `free'. The behavior is undefined if
2542 you dereference this pointer.
2544 * The C library now runs on Sony NEWS m68k machines running either
2545 NewsOS 3 or NewsOS 4.
2547 * The new `syscall' function is a system-dependent primitive function
2548 for invoking system calls. It has the canonical behavior on Unix
2549 systems, including unreliable return values for some calls (such as
2550 `pipe', `fork' and `getppid').
2552 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2553 to `EAGAIN', which is the preferred name. On systems whose kernels
2554 use two distinct codes, the C library now translates EWOULDBLOCK to
2555 EAGAIN in every system call function.
2559 * The GNU C Library Reference Manual is now distributed with the library.
2560 `make dvi' will produce a DVI file of the printed manual.
2561 `make info' will produce Info files that you can read on line using C-h i
2562 in Emacs or the `info' program.
2563 Please send comments on the manual to bug-glibc-manual@gnu.org.
2565 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2567 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2569 * Jason Merrill has contributed a port to the Sequent Symmetry running
2570 Dynix version 3 (i386-sequent-dynix).
2572 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2573 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2575 * New function `memory_warnings' lets you arrange to get warnings when
2576 malloc is running out of memory to allocate, like Emacs gives you.
2578 * The C library now contains the relocating allocator used in Emacs 19 for
2579 its editing buffers. This allocator (ralloc) minimizes allocation
2580 overhead and fragmentation by moving allocated regions around whenever it
2581 needs to. You always refer to a ralloc'd region with a "handle" (a
2582 pointer to a pointer--an object of type `void **').
2584 * There is a new `printf' format: `%m' gives you the string corresponding
2585 to the error code in `errno'.
2587 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2588 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2589 pass, the `a' modifier says to fill in a `char **' you pass with a
2592 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2593 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2594 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2596 * `mkstemp' is a traditional Unix function to atomically create and open a
2597 uniquely-named temporary file.
2601 * The standard location for the file that says what the local timezone is
2602 has changed again. It is now `/usr/local/etc/localtime' (or more
2603 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2605 * The distribution no longer contains any files with names longer than 14
2608 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2609 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2611 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2615 * The configuration process has changed quite a bit. The `configure'
2616 script is now used just like the configuration scripts for other GNU
2617 packages. The `sysdeps' directory hierarchy is much rearranged.
2618 The file `INSTALL' explains the new scheme in detail.
2620 * The header files no longer need to be processed into ANSI C and
2621 traditional C versions. There is just one set of files to install, and
2622 it will work with ANSI or old C compilers (including `gcc -traditional').
2624 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2625 MIPS DECStation running Ultrix 4.
2627 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2628 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2629 made itself into a shared library.
2631 * Yet further improved support for the i386, running 4.3 BSD-like systems
2632 (such as Mach 3 with the Unix single-server), or System V.
2634 * New function `strncasecmp' to do case-insensitive string comparison
2635 with limited length.
2637 * New function `strsep' is a reentrant alternative to `strtok'.
2639 * New functions `scandir' and `alphasort' for searching directories.
2641 * New function `setenv' is a better interface to `putenv'.
2643 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2644 function for traversing a directory tree.
2646 * The GNU obstack package is now also part of the C library.
2647 The new function `open_obstack_stream' creates a stdio stream that
2648 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2649 formatted output directly to an obstack.
2651 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2652 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2654 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2656 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2657 things to your strings.
2659 * There are some new test programs: test-fseek, testmb, and testrand.
2661 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2662 These ports are not finished, but are a good starting place for really
2663 supporting those systems.
2665 * `/etc/localtime' is now the standard location for the file that says what
2666 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2667 This follows the general principle that `/etc' is the place for all local
2668 configuration files.
2670 * The C library header files now use `extern "C"' when used by the C++
2671 compiler, so the C library should now work with C++ code.
2673 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2674 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2677 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2678 function which uses the `merge sort' algorithm, and is said to be
2679 significantly faster than the old GNU `qsort' function. Merge sort is
2680 now the standard `qsort' function. The new algorithm can require a lot
2681 of temporary storage; so, the old sorting function is called when the
2682 required storage is not available.
2684 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2685 provides the Unix `crypt' function, plus some other entry points.
2687 * The code and header files taken from 4.4 BSD have been updated with the
2688 latest files released from Berkeley.
2690 ----------------------------------------------------------------------
2691 Copyright information:
2693 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2695 Permission is granted to anyone to make or distribute verbatim copies
2696 of this document as received, in any medium, provided that the
2697 copyright notice and this permission notice are preserved,
2698 thus giving the recipient permission to redistribute in turn.
2700 Permission is granted to distribute modified versions
2701 of this document, or of portions of it,
2702 under the above conditions, provided also that they
2703 carry prominent notices stating who last changed them.
2706 version-control: never