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 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
11 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
12 unnecessary serialization of memory allocation requests across threads.
13 The defect is now corrected. Users should see a substantial increase in
14 the concurent throughput of allocation requests for applications which
15 trigger this bug. Affected applications typically create create and
16 destroy threads frequently. (Bug 19048 was reported and analyzed by
19 * There is now a --disable-timezone-tools configure option for disabling the
20 building and installing of the timezone related utilities (zic, zdump, and
21 tzselect). This is useful for people who build the timezone data and code
22 independent of the GNU C Library.
24 * The LD_POINTER_GUARD environment variable can no longer be used to
25 disable the pointer guard feature. It is always enabled.
27 * The obsolete header <regexp.h> has been removed. Programs that require
28 this header must be updated to use <regex.h> instead.
30 * Optimized string, wcsmbs and memory functions for IBM z13.
31 Implemented by Stefan Liebler.
33 * The minimum GCC version that can be used to build this version of the GNU
34 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
35 still be used to compile programs using the GNU C Library.
37 * The following bugs are resolved with this release:
39 [The release manager will add the list generated by
40 scripts/list-fixed-bugs.py just before the release.]
44 * The following bugs are resolved with this release:
46 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
47 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
48 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
49 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
50 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
51 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
52 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
53 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
54 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
55 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
56 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
57 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
58 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
59 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
60 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
61 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
62 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
63 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
64 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
65 18657, 18676, 18694, 18696, 18887.
67 * Cache information can be queried via sysconf() function on s390 e.g. with
68 _SC_LEVEL1_ICACHE_SIZE as argument.
70 * A buffer overflow in gethostbyname_r and related functions performing DNS
71 requests has been fixed. If the NSS functions were called with a
72 misaligned buffer, the buffer length change due to pointer alignment was
73 not taken into account. This could result in application crashes or,
74 potentially arbitrary code execution, using crafted, but syntactically
75 valid DNS responses. (CVE-2015-1781)
77 * The time zone file parser has been made more robust against crafted time
78 zone files, avoiding heap buffer overflows related to the processing of
79 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
80 large time zone data files. Overly long time zone specifiers in the TZ
81 variable no longer result in stack overflows and crashes.
83 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
84 for LD and GD on x86 and x86-64, has been implemented. You will need
85 binutils-2.24 or later to enable this optimization.
87 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
88 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
89 Hat). These updates cause user visible changes, such as the fix for bug
92 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
93 and getXXbyYY NSS calls for the same database, causing a denial-of-service
94 condition in some applications.
96 * Added vector math library named libmvec with the following vectorized x86_64
97 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
99 The library can be disabled with --disable-mathvec. Use of the functions is
100 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
101 Shared library libmvec.so is linked in as needed when using -lm (no need to
102 specify -lmvec explicitly for not static builds).
103 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
105 * A new fmemopen implementation has been added with the goal of POSIX
106 compliance. The new implementation fixes the following long-standing
107 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
108 old implementation is still present for use be by existing binaries.
110 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
111 releases. It has been fixed to match 2.19 and older, but binaries built
112 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
114 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
115 Contributed by Roland McGrath (Google).
117 * The header <regexp.h> is deprecated, and will be removed in a future
118 release. Use of this header will trigger a deprecation warning.
119 Application developers should update their code to use <regex.h> instead.
121 This header was formerly part of SUS, but was deprecated in 1994 and
122 removed from the standard in 2001. Also, the glibc implementation
123 leaks memory. See BZ#18681 for more details.
127 * The following bugs are resolved with this release:
129 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
130 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
131 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
132 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
133 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
134 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
135 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
136 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
137 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
138 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
141 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
142 too little memory for the to-be-scanned arguments and overflow the
143 allocated buffer. The implementation now correctly computes the required
144 buffer size when using malloc, and switches to malloc from alloca as
147 * A new semaphore algorithm has been implemented in generic C code for all
148 machines. Previous custom assembly implementations of semaphore were
149 difficult to reason about or ensure that they were safe. The new version
150 of semaphore supports machines with 64-bit or 32-bit atomic operations.
151 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
152 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
154 * Port to Altera Nios II has been contributed by Mentor Graphics.
156 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
157 implementations for powerpc64/powerpc64le.
158 Implemented by Adhemerval Zanella (IBM).
160 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
161 and powerpc64le. This may improve lock scaling of existing programs on
162 HTM capable systems. The lock elision code is only enabled with
163 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
164 powerpc will issue a transaction abort on every syscall to avoid side
165 effects being visible outside transactions.
167 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
168 AArch64. Contributed by ARM Ltd.
170 * i386 memcpy functions optimized with SSE2 unaligned load/store.
172 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
173 under certain input conditions resulting in the execution of a shell for
174 command substitution when the application did not request it. The
175 implementation now checks WRDE_NOCMD immediately before executing the
176 shell and returns the error WRDE_CMDSUB as expected.
178 * CVE-2012-3406 printf-style functions could run into a stack overflow when
179 processing format strings with a large number of format specifiers.
181 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
182 infinite loop if the DNS response contained a PTR record of an unexpected
185 * The minimum GCC version that can be used to build this version of the GNU
186 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
187 still be used to compile programs using the GNU C Library.
189 * The GNU C Library is now built with -Werror by default. This can be
190 disabled by configuring with --disable-werror.
192 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
194 * The obsolete sigvec function has been removed. This was the original
195 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
196 programs have been using instead for about 25 years. Of course, ABI
197 compatibility for old binaries using sigvec remains intact.
199 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
200 with newer versions of bison.
202 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
203 The original MIPS o32 hard-float ABI requires an FPU where double-precision
204 registers overlay two consecutive single-precision registers. MIPS32R2
205 introduced a new FPU mode (FR=1) where double-precision registers extend the
206 corresponding single-precision registers which is incompatible with the
207 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
208 require the use of FR=1 making a transition necessary. New o32 ABI
209 extensions enable users to migrate over time from the original o32 ABI
210 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
211 tracks the ABI of any loaded object and verifies that new objects are
212 compatible. Mode transitions will also be requested as required and
213 unsupportable objects will be rejected. The ABI checks include both soft and
214 hard float ABIs for o32, n32 and n64.
216 GCC 5 with GNU binutils 2.25 onwards:
217 It is strongly recommended that all o32 system libraries are built using the
218 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
219 with the original and all new o32 ABI extensions. Configure a MIPS GCC
220 compiler using --with-fp-32=xx to set this by default.
224 * The following bugs are resolved with this release:
226 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
227 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
228 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
229 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
230 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
231 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
232 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
233 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
234 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
235 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
236 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
237 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
238 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
239 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
240 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
242 * Reverted change of ABI data structures for s390 and s390x:
243 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
244 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
245 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
246 are preserved pointing straight to the same implementation as the old ones.
247 Given that, new callers will simply provide a too-big buffer to these
248 functions. Any applications/libraries out there that embed jmp_buf or
249 ucontext_t in an ABI-relevant data structure that have already been rebuilt
250 against 2.19 headers will have to rebuilt again. This is necessary in any
251 case to revert the breakage in their ABI caused by the glibc change.
253 * Support for file description locks is added to systems running the
254 Linux kernel. The standard file locking interfaces are extended to
255 operate on file descriptions, not file descriptors, via the use of
256 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
257 are associated with an open file instead of a process.
259 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
261 * The minimum Linux kernel version that this version of the GNU C Library
262 can be used with is 2.6.32.
264 * Running the testsuite no longer terminates as soon as a test fails.
265 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
266 with PASS or FAIL lines for individual tests. A summary of the results is
267 printed, including a list of failing lists, and "make check" exits with
268 error status if there were any unexpected failures. "make check
269 stop-on-test-failure=y" may be used to keep the old behavior.
271 * The am33 port, which had not worked for several years, has been removed
274 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
275 supported; they now act the same as _DEFAULT_SOURCE (but generate a
276 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
277 conflicted with POSIX (support for which was removed in 2.19), the
278 interfaces those macros enabled remain available when compiling with
279 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
282 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
284 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
285 This may improve lock scaling of existing programs on TX capable systems.
286 The lock elision code is only built with --enable-lock-elision=yes and
287 then requires a GCC version supporting the TX builtins. With lock elision
288 default mutexes are elided via __builtin_tbegin, if the cpu supports
289 transactions. By default lock elision is not enabled and the elision code
292 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
293 copy the path argument. This allowed programs to cause posix_spawn to
294 deference a dangling pointer, or use an unexpected pathname argument if
295 the string was modified after the posix_spawn_file_actions_addopen
298 * All supported architectures now use the main glibc sysdeps directory
299 instead of some being in a separate "ports" directory (which was
300 distributed separately before glibc 2.17).
302 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
303 On configurations that support it (all Linux configurations), it's now
304 used regardless of the --enable-add-ons switch to configure. It is no
305 longer possible to build such configurations without pthreads support.
307 * Locale names, including those obtained from environment variables (LANG
308 and the LC_* variables), are more tightly checked for proper syntax.
309 setlocale will now fail (with EINVAL) for locale names that are overly
310 long, contain slashes without starting with a slash, or contain ".." path
311 components. (CVE-2014-0475) Previously, some valid locale names were
312 silently replaced with the "C" locale when running in AT_SECURE mode
313 (e.g., in a SUID program). This is no longer necessary because of the
316 * On x86-64, the dynamic linker's lazy-binding support is now compatible
317 with application code using Intel MPX instructions. (With all previous
318 versions, the MPX register state could be clobbered when making calls
319 into or out of a shared library.) Note that while the new dynamic
320 linker is compatible with all known x86 hardware whether or not it
321 supports Intel MPX, some x86 instruction-set emulators might fail to
322 handle the new instruction encodings. This is known to affect Valgrind
323 versions up through 3.9 (but will be fixed in the forthcoming 3.10
324 release), and might affect other tools that do instruction emulation.
326 * Support for loadable gconv transliteration modules has been removed.
327 The support for transliteration modules has been non-functional for
328 over a decade, and the removal is prompted by security defects. The
329 normal gconv conversion modules are still supported. Transliteration
330 with //TRANSLIT is still possible, and the //IGNORE specifier
331 continues to be supported. (CVE-2014-5119)
333 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
334 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
335 resulting a denial-of-service security vulnerability in applications which
336 use functions related to iconv. (CVE-2014-6040)
340 * The following bugs are resolved with this release:
342 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
343 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
344 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
345 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
346 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
347 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
348 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
349 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
350 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
351 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
352 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
353 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
354 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
355 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
356 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
357 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
358 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
359 16431, 16453, 16474, 16506, 16510, 16529
361 * Slovenian translations for glibc messages have been contributed by the
362 Translation Project's Slovenian team of translators.
364 * The public headers no longer use __unused nor __block. This change is to
365 support compiling programs that are derived from BSD sources and use
366 __unused internally, and to support compiling with Clang's -fblock
367 extension which uses __block.
369 * CVE-2012-4412 The strcoll implementation caches indices and rules for
370 large collation sequences to optimize multiple passes. This cache
371 computation may overflow for large collation sequences and may cause a
372 stack or buffer overflow. This is now fixed to use a slower algorithm
373 which does not use a cache if there is an integer overflow.
375 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
376 rules for large collation sequences to optimize multiple passes and falls
377 back to alloca if malloc fails, resulting in a possible stack overflow.
378 The implementation now falls back to an uncached collation sequence lookup
381 * CVE-2013-4788 The pointer guard used for pointer mangling was not
382 initialized for static applications resulting in the security feature
383 being disabled. The pointer guard is now correctly initialized to a
384 random value for static applications. Existing static applications need
385 to be recompiled to take advantage of the fix (bug 15754).
387 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
388 to the d_name member of struct dirent, or omit the terminating NUL
389 character. (Bugzilla #14699).
391 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
392 aligned_alloc functions could allocate too few bytes or corrupt the
393 heap when passed very large allocation size values (Bugzilla #15855,
396 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
397 for AF_INET6 has been fixed (Bugzilla #16072).
399 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
400 pap_CW, quz_PE, the_NP.
402 * Substantially revised locales: gd_GB, ht_HT
404 * The LC_ADDRESS field was updated to support country_car for almost all
407 * ISO 1427 definitions were updated.
409 * ISO 3166 definitions were updated.
411 * The localedef utility now supports --big-endian and --little-endian
412 command-line options to generate locales for a different system from that
413 for which the C library was built.
415 * Binary locale files now only depend on the endianness of the system for
416 which they are generated and not on other properties of that system. As a
417 consequence, binary files generated with new localedef may be incompatible
418 with old versions of the GNU C Library, and binary files generated with
419 old localedef may be incompatible with this version of the GNU C Library,
420 in the following circumstances:
422 + Locale files may be incompatible on m68k systems.
424 + Locale archive files (but not separate files for individual locales) may
425 be incompatible on systems where plain "char" is signed.
427 * The configure option --disable-versioning has been removed. Builds with
428 --disable-versioning had not worked for several years.
430 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
431 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
433 * SystemTap probes for malloc have been introduced.
435 * SystemTap probes for slow multiple precision fallback paths of
436 transcendental functions have been introduced.
438 * Support for powerpc64le has been added.
440 * The soft-float powerpc port now supports e500 processors.
442 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
444 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
445 set of header declarations that are enabled by default, even when other
446 feature test macros or compiler options such as -std=c99 would otherwise
447 disable some of those declarations.
449 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
450 conflict with POSIX. The libbsd-compat library (which was a dummy library
451 that did nothing) has also been removed.
453 * Preliminary documentation about Multi-Thread, Async-Signal and
454 Async-Cancel Safety has been added.
456 * Change of ABI data structures for s390 and s390x:
457 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
458 allow for future hardware extensions. All library functions that accept or
459 return these structures were versioned in order to provide backwards
460 compatibility with existing code. However, not all cases can be handled
461 with interface versioning. If an application embeds either structure into
462 another structure and that structure is passed to another compilation unit
463 which expects the newer larger-sized object then any access to the new
464 fields will result in undefined behaviour. Similarly any access to fields
465 that were moved by the enlarging of the structures will cause undefined
466 behaviour. To fix the undefined behaviour all objects that are part of the
467 final in-memory image must agree on the size of structures, and this may
468 require recompilation.
472 * The following bugs are resolved with this release:
474 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
475 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
476 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
477 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
478 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
479 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
480 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
481 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
482 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
483 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
484 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
485 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
486 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
489 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
490 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
491 Distributions can re-enable building and using pt_chown via the new configure
492 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
493 considerable security risks and should only be used if the distribution
494 understands and accepts the risks.
496 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
499 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
500 fixed (Bugzilla #15330).
502 * Add support for calling C++11 thread_local object destructors on thread
503 and program exit. This needs compiler support for offloading C++11
504 destructor calls to glibc.
506 * Improved worst case performance of libm functions with double inputs and
509 * Support for priority inherited mutexes in pthread condition variables on
510 non-x86 architectures.
512 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
514 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
516 * Optimized string functions for ARM. Implemented by Will Newton and
519 * Optimized libm functions for SPARC. Implemented by David S. Miller.
521 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
524 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
525 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
527 * Added a benchmark framework to track performance of functions in glibc.
529 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
530 It is based on draft TS 18661 and currently enabled as a GNU extension.
532 * On Linux, the clock function now uses the clock_gettime system call
533 for improved precision, rather than old times system call.
535 * Added support for version-3 tz format files. This is needed when using
536 the tz database release 2013e or later, and affects a few unusual cases --
537 currently only TZ='America/Godthab' for time stamps after 2037.
539 * Added new API functions pthread_getattr_default_np and
540 pthread_setattr_default_np to get and set the default pthread
541 attributes of a process.
543 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
544 This may improve lock scaling of existing programs on TSX capable systems.
545 When the --enable-lock-elision=yes parameter is specified at configure
546 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
549 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
550 availability). Implemented by Ryan S. Arnold.
552 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
556 * The following bugs are resolved with this release:
558 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
559 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
560 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
561 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
562 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
563 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
564 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
565 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
566 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
567 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
568 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
569 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
570 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
571 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
572 14879, 14889, 14893, 14898, 14914.
574 * Optimization of memcpy for MIPS.
576 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
577 EMFILE has been fixed (Bugzilla #14889).
579 * The add-on ports collection is now distributed in the "ports" subdirectory
580 of the main GNU C Library distribution, rather than separately.
582 * Port to ARM AArch64 contributed by Linaro.
584 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
585 Optimized versions of memcpy, memset, and memcmp added for System z10 and
587 Implemented by Andreas Krebbel.
589 * The new function secure_getenv allows secure access to the environment,
590 returning NULL if running in a SUID/SGID process. This function replaces
591 the internal function __secure_getenv.
593 * SystemTap static probes have been added into the dynamic linker.
594 Implemented by Gary Benson.
596 * Optimizations of string functions strstr, strcasestr and memmem.
597 Implemented by Maxim Kuvyrkov.
599 * The minimum Linux kernel version that this version of the GNU C Library
600 can be used with is 2.6.16.
602 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
603 powerpc POWER7. Implemented by Will Schmidt.
605 * New configure option --disable-nscd builds the C library such that it
606 never attempts to contact the Name Service Caching Daemon (nscd).
607 New configure option --disable-build-nscd avoids building nscd itself;
608 this is the default if --disable-nscd is used.
610 * Improved support for cross-compilation, including cross-testing and
611 bootstrap builds without a previously built glibc.
613 * Several testsuite tests are now able to test multiple IFUNC variants of an
614 interface, rather than just testing the one that would be chooen by
617 * New configure options --with-bugurl and --with-pkgversion, for
618 distributors to use to embed their bug-reporting and package version
619 information in --help and --version output.
621 * The ttyname and ttyname_r functions on Linux now fall back to searching for
622 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
623 allows creation of chroots without the procfs mounted on /proc.
625 * The `crypt' function now fails if passed salt bytes that violate the
626 specification for those values. On Linux, the `crypt' function will
627 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
628 enabled, and fail on encrypted strings using the MD5 or DES algorithm
629 when the mode is enabled.
631 * The `clock_*' suite of functions (declared in <time.h>) is now available
632 directly in the main C library. Previously it was necessary to link with
633 -lrt to use these functions. This change has the effect that a
634 single-threaded program that uses a function such as `clock_gettime' (and
635 is not linked with -lrt) will no longer implicitly load the pthreads
636 library at runtime and so will not suffer the overheads associated with
637 multi-thread support in other code such as the C++ runtime library.
639 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
644 * The following bugs are resolved with this release:
646 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
647 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
648 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
649 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
650 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
651 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
652 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
653 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
654 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
655 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
656 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
657 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
658 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
659 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
660 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
661 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
662 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
663 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
664 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
665 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
666 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
667 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
670 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
671 configuring glibc with:
672 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
673 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
674 Implemented by H.J. Lu.
678 + define static_assert
680 + do not declare gets
682 + declare at_quick_exit and quick_exit also for ISO C11
684 + aligned_alloc. NB: The code is deliberately allows the size parameter
685 to not be a multiple of the alignment. This is a moronic requirement
686 in the standard but it is only a requirement on the caller, not the
691 + uchar.h support added
693 + CMPLX, CMPLXF, CMPLXL added
695 Implemented by Ulrich Drepper.
697 * Support for the IA-64 has been moved to ports.
699 * Remove support for anything but ELF binary format
701 * Checking versions of poll, ppoll added.
702 Implemented by Ulrich Drepper.
704 * More generic and 64-bit performance optimizations to math functions.
705 Implemented by Ulrich Drepper.
707 * New configure option --enable-obsolete-rpc makes the deprecated RPC
708 headers and functions available at compile time as they were before
709 version 2.14. This option will be removed at some time in the future
710 after the TI-RPC library becomes fully sufficient for the needs of
711 existing applications.
713 * Compatibility code for Linux kernel versions before 2.4 has been removed.
714 Note that glibc is not expected to work with any Linux kernel version
717 * New header <sys/auxv.h> and function getauxval allowing easy access to
718 the AT_* key-value pairs passed from the Linux kernel. The header also
719 defines the HWCAP_* bits associated with the AT_HWCAP key.
721 * New locales: mag_IN
723 * New configure option --enable-systemtap builds SystemTap static probes
724 into libc for setjmp and longjmp and into libpthread for various operations.
725 So far the setjmp/longjmp probes and some of the libpthread probes are
726 provided only for i*86 and x86_64.
727 Implemented by Roland McGrath and Rayson Ho.
729 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
731 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
734 * More optimized functions for SPARC. Implemented by David S. Miller.
736 * Improved support for cross-compilation, especially bootstrap builds
737 without a previously built glibc.
739 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
740 Chris Metcalf from Tilera.
742 * Support for the old ARM ABI has been removed from ports. Only the EABI is
743 now supported for ARM processors.
745 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
746 as the name of the dynamic linker, to distinguish it from the
747 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
749 * Support for CRIS has been removed from ports.
751 * A new class of installed header has been documented for low-level
752 platform-specific functionality. PowerPC added the first instance with a
753 function to provide time base register access. Contributed by Tulio
754 Magno Quites Machado Filho.
756 * ix86 configurations now install header files that are consistent with
757 what x86-64 configurations install. These same header files can be used
758 for -m32, -m64, or -mx32 builds.
759 Contributed by H.J. Lu.
761 * Math library bug fixes. A thorough audit of all open math library bugs was
762 conducted by Joseph Myers. Significant progress was made on many math
763 library bugs resulting in more accurate exceptions and function results.
764 Many thanks to all those that contributed including Andreas Jaeger for his
765 patch review and work on the x87 trigonometric instruction issues.
767 * Timezone data is no longer installed. Timezone-related binaries and scripts
768 will continue to be installed. Users should obtain their timezone data from
769 their distribution provider or from the tzdata package at
770 <ftp://munnari.oz.au/pub/>.
774 * The following bugs are resolved with this release:
776 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
777 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
778 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
779 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
780 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
781 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
782 13484, 13506, 13515, 13523, 13524, 13538, 13540
784 * New program pldd to list loaded object of a process
785 Implemented by Ulrich Drepper.
787 * Add nss_db support back to glibc. No more dependency on Berkeley db
788 and support for initgroups lookups.
789 Implemented by Ulrich Drepper.
791 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
792 Contributed by HJ Lu.
794 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
795 Contributed by HJ Lu.
797 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
798 on x86-32 and x86-64.
799 Contributed by Liubov Dmitrieva.
801 * Optimized strchr and strrchr for SSE on x86-32.
802 Contributed by Liubov Dmitrieva.
804 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
805 for x86-64 and x86-32.
806 Contributed by Liubov Dmitrieva.
808 * New interfaces: scandirat, scandirat64
809 Implemented by Ulrich Drepper.
811 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
812 Implemented by Ulrich Drepper.
814 * nscd now also caches the netgroup database.
815 Implemented by Ulrich Drepper.
817 * Integrate libm with gcc's -ffinite-math-only option.
818 Implemented by Ulrich Drepper.
820 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
821 to math functions. Implemented by Ulrich Drepper.
823 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
824 Implemented by Ulrich Drepper.
826 * New Linux interfaces: process_vm_readv, process_vm_writev
828 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
829 Implemented by Ulrich Drepper.
831 * Optimized nearbyint and strcasecmp for PPC.
832 Implemented by Adhemerval Zanella.
834 * New locales: bho_IN, unm_US, es_CU, ta_LK
838 * The following bugs are resolved with this release:
840 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
841 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
842 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
843 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
844 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
845 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
846 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
847 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
848 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
849 12795, 12811, 12813, 12814, 12841
851 * The RPC implementation in libc is obsoleted. Old programs keep working
852 but new programs cannot be linked with the routines in libc anymore.
853 Programs in need of RPC functionality must be linked against TI-RPC.
854 The TI-RPC implementation is IPv6 enabled and there are other benefits.
856 Visible changes of this change include (obviously) the inability to link
857 programs using RPC functions without referencing the TI-RPC library and the
858 removal of the RPC headers from the glibc headers.
859 Implemented by Ulrich Drepper.
861 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
862 syncfs, setns, sendmmsg
864 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
865 yue_HK, lij_IT, mhr_RU
867 * New encodings: CP770, CP771, CP772, CP773, CP774
869 * New program sotruss to trace calls through PLTs
870 Implemented by Ulrich Drepper.
872 * The malloc hook implementation is marked deprecated and will be removed
873 from the default implementation in the next version. The design never
874 worked ever since the introduction of threads. Even programs which do
875 not create threads themselves can use multiple threads created internally.
879 * The following bugs are resolved with this release:
881 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
882 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
883 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
884 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
887 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
889 * POWER7 optimizations: memset, memcmp, strncmp
891 * New optimized string functions for x86-64: strnlen (SSE2),
892 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
893 Implemented by Ulrich Drepper.
897 * The following bugs are resolved with this release:
899 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
900 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
901 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
902 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
903 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
904 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
905 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
906 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
908 * New interfaces: pthread_getname_np, pthread_setname_np
910 * New Linux interface: recvmmsg
912 * STT_GNU_IFUNC implemented for Sparc by David Miller.
914 * The dynamic linker now recognizes supported ABI versions from the
915 EI_ABIVERSION field in the ELF header.
916 Implemented by Ulrich Drepper.
918 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
919 will not be used to fill in password fields in the passwd.byname replies.
920 Instead it is used to synthesize the shadow.byname table, should it be
921 missing. This is a useful mode in some installations involving Solaris.
922 Implemented by Ulrich Drepper.
924 * New locales: kok_IN, sq_MK, cv_RU
928 * The following bugs are resolved with this release:
930 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
931 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
932 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
933 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
934 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
935 10789, 10817, 10823, 10840, 10847
937 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
939 Implemented by Ulrich Drepper.
941 * Checking version of longjmp added that fails if an uninitialized stack
942 frame would be created. Implemented by Ulrich Drepper.
944 * STT_GNU_IFUNC is now supported in static executables.
945 Implemented by H.J. Lu.
947 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
949 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
950 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
951 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
952 Contributed by H.J. Lu.
954 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
955 Implemented by Ulrich Drepper.
957 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
959 Contributed by H.J. Lu.
961 * Support for fma instruction in AVX on x86-64.
962 Implemented by H.J. Lu and Ulrich Drepper.
964 * AVX support in x86-64 auditing support in ld.so.
965 Implemented by H.J. Lu.
967 * STB_GNU_UNIQUE support added.
968 Implemented by Ulrich Drepper.
970 * Implement second fallback mode for optimized DNS lookup for even more
971 broken environments. If two requests from the same port are not
972 handled correctly close the socket and open a new one before sending
973 the second request. The 'single-request-reopen' option in /etc/resolv.conf
974 can be used to select this mode right away, instead of rediscovering the
975 necessity is every process again.
976 Implemented by Ulrich Drepper.
978 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
979 Implemented by Adam Tkac.
981 * Optimized iconv conversions for S390x.
982 Implemented by Andreas Krebbel.
984 * Using condvars with PI mutexes is now more efficient due to kernel
985 support for requeueing to PI futexes. NPTL support added for x86-64.
986 Implemented by Ulrich Drepper.
988 * New locales: ps_AF, my_MM
992 * The following bugs are resolved with this release:
994 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
995 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
996 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
997 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
998 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1000 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1001 Implemented by Ulrich Drepper.
1003 * New Linux interfaces: accept4, fallocate, fallocate64.
1004 Implemented by Ulrich Drepper.
1006 * Correct declarations of string function when used in C++ code. This
1007 could lead to compile errors for invalid C++ code.
1009 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1012 * New POSIX 2008 interface: psiginfo
1013 Implemented by Ulrich Drepper.
1015 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1016 Implemented by Ulrich Drepper.
1018 * Support for selecting between multiple function definitions at runtime
1019 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1021 * The libcrypt library can now use the hash function implementations in
1022 NSS. Implemented by Ulrich Drepper.
1024 * The malloc implementation can be compiled to be less memory efficient
1025 but higher performing in multi-threaded programs.
1026 Implemented by Ulrich Drepper.
1028 * New locales: nan_TW@latin, ks_IN
1030 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1031 Implemented by Ulrich Drepper.
1033 * Extended printf hook support. It is possible to use user-defined types
1034 and extend existing format specifiers.
1035 Implemented by Ulrich Drepper.
1037 * Handling for group shadow files has been added.
1038 Implemented by Ulrich Drepper.
1040 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1041 servers (the case, e.g., for some people using the built-in DNS
1042 server in ADSL modems/routers). There is a once-per-process timeout
1043 in case of a broken server. To avoid it, users can run nscd or put
1044 'options single-request' in /etc/resolv.conf.
1045 Implemented by Ulrich Drepper.
1049 * The following bugs are resolved with this release:
1051 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1052 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1053 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1054 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1055 6968, 6974, 6980, 6995, 7008, 7009, 7029
1057 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1058 up at the same time. Implemented by Ulrich Drepper.
1060 * TLS descriptors for LD and GD on x86 and x86-64.
1061 Implemented by Alexandre Oliva.
1063 * getaddrinfo now handles DCCP and UDPlite.
1064 Implemented by Ulrich Drepper.
1066 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1067 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1068 Implemented by Ulrich Drepper.
1070 * New implementation of memmem, strstr, and strcasestr which is O(n).
1071 Implemented by Eric Blake.
1073 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1075 * Implement "e" option for popen to open file descriptor with the
1076 close-on-exec flag set. Implemented by Ulrich Drepper.
1078 * Implement "b" mode for fmemopen. In this mode writes writes don't
1079 implicitly add a NUL byte and seeks from the end of the buffer really
1080 use the buffer end, not the string length as the basis.
1081 Implemented by Ulrich Drepper.
1083 * Many functions, exported and internal, now atomically set the close-on-exec
1084 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1086 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1088 Implemented by Pravin Satpute.
1090 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1094 * The following bugs are resolved with this release:
1096 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1097 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1098 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1099 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1100 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1101 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1102 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1104 * New locales: bo_CN, bo_IN, shs_CA.
1106 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1108 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1109 Implemented by Pravin Satpute.
1111 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1113 * nscd caches now all timeouts for DNS entries
1114 Implemented by Ulrich Drepper.
1116 * nscd is more efficient and wakes up less often.
1117 Implemented by Ulrich Drepper.
1119 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1120 vdprintf, and obstack_vprintf.
1121 Implemented by Jakub Jelinek.
1123 * Faster memset for x86-64.
1124 Implemented by Harsha Jagasia and H.J. Lu.
1126 * Faster memcpy on x86.
1127 Implemented by Ulrich Drepper.
1129 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1130 Implemented by Ulrich Drepper.
1132 * Faster sqrt and sqrtf implemention for some PPC variants.
1133 Implemented by Steven Munroe.
1137 * The following bugs are resolved with this release:
1139 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1140 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1141 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1142 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1143 5071, 5103, 5104, 5112, 5113, 5184, 5186
1145 * More checking functions: fread, fread_unlocked, open*, mq_open.
1146 Implemented by Jakub Jelinek and Ulrich Drepper.
1148 * Extend fortification to C++. Implemented by Jakub Jelinek.
1150 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1151 by not recognizing 'a' as a modifier when those specs are requested.
1152 Implemented by Jakub Jelinek.
1154 * PPC optimizations to math and string functions.
1155 Implemented by Steven Munroe.
1157 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1158 options to be passed. Implemented by Ulrich Drepper.
1160 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1162 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1163 Implemented by Ulrich Drepper.
1165 * Handle private futexes in the NPTL implementation.
1166 Implemented by Jakub Jelinek and Ulrich Drepper.
1168 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1169 Implemented by Roland McGrath and Ulrich Drepper.
1171 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1173 * SHA-256 and SHA-512 based password encryption.
1174 Implemented by Ulrich Drepper.
1176 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1177 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1180 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1181 Implemented by Ulrich Drepper.
1185 * The following bugs are resolved with this release:
1187 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1188 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1189 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1190 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1191 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1192 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1193 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1196 * New Linux interfaces: epoll_pwait, sched_getcpu.
1198 * New generic interfaces: strerror_l.
1200 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1204 * The following bugs are resolved with this release:
1206 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1207 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1208 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1209 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1210 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1211 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1212 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1213 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1214 3225, 3251, 3252, 3253, 3273
1216 * For Linux, the sorting of addresses returned by getaddrinfo now also
1217 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1218 Implemented by Ulrich Drepper.
1220 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1221 Implemented by Ulrich Drepper.
1223 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1225 * New iconv module for MIK. Contributed by Alexander Shopov.
1227 * For sites with broken group and/or passwd database, the auto-propagate
1228 option of nscd can prevent creating ID lookup entries from the results
1229 of a name lookup and vice versa. This usually is no problem but some
1230 site might have problems with the default behavior.
1231 Implemented by Ulrich Drepper.
1233 * Iterating over entire database in NIS can be slow. With the
1234 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1235 to trade time for memory. The entire database will be read at once.
1236 Implemented by Ulrich Drepper.
1238 * The interfaces introduced in RFC 3542 have been implemented by
1241 * Support for the new ELF hash table format was added by Ulrich Drepper.
1243 * Support for priority inheritance mutexes added by Jakub Jelinek and
1246 * Support for priority protected mutexes added by Jakub Jelinek.
1248 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1249 or_IN, csb_PL, fy_NL, sr_ME.
1253 * More overflow detection functions.
1255 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1256 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1258 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1259 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1260 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1261 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1262 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1263 by Masahide Washizawa.
1265 * It is now possible to install audit libraries for the dynamic linker using
1266 LD_AUDIT. Implemented by Ulrich Drepper.
1268 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1269 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1270 For a libc and libpthread that works well on Linux 2.4 kernels, we
1271 recommend using the stable 2.3 branch.
1273 * The new function open_wmemstream acts like open_memstream,
1274 but uses a wchar_t wide character buffer.
1276 * The new function ppoll is an improved version of poll, similar to pselect.
1278 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1279 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1280 renameat, unlinkat, linkat, symlinkat, readlinkat.
1282 * New Linux kernel system calls: unshare,
1283 inotify_init, inotify_add_watch, inotify_rm_watch.
1285 * The euidaccess function is now also known by the alias eaccess,
1286 for compatibility with some other systems.
1288 * Timezone data updated to 2006b version.
1292 * The following bugs are resolved with this release:
1294 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1295 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1296 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1297 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1298 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1299 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1301 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1303 * As of this release, GCC 4 can be used to compile the C Library.
1305 * Timezone data updated to 2005m version.
1309 * The following bugs are resolved with this release:
1311 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1312 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1313 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1314 777, 787, 821, 822, 823, 825
1316 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1320 * Support for RFC 3678. Real implementations exist only for Linux so far.
1321 Implemented by Ulrich Drepper.
1323 * nscd can now cache entries persistently. Expiring entries are reloaded.
1324 For speedups the cache can be shared in memory with client processes.
1325 Implemented by Ulrich Drepper.
1327 * nscd can now perform SELinux checks.
1328 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1330 * getaddrinfo queries are now cached. Canonical name lookup is performed
1332 Implemented by Ulrich Drepper.
1334 * The nothrow function attribute is used when headers are used by gcc when
1335 compiling C code. This can avoid significant amounts of exception
1338 * The malloc functions perform more error checking and are stricter when
1339 it comes to reacting on errors. The default action is to terminate
1340 the process after showing an error message. Implemented by Ulrich Drepper.
1342 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1343 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1345 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1346 namespaces using the new function dlmopen(). This feature is of course,
1347 like most other dynamic loading functionality, not available in statically
1348 linked applications. Implemented by Ulrich Drepper.
1350 * Low-overhead boundary checking variants of string and some stdio functions
1351 were added. These are to be used in conjunction with a gcc patch by
1352 Jakub Jelinek which adds calls to these functions if possible.
1353 Implemented by Jakub Jelinek and Ulrich Drepper.
1355 * Old code for several operating systems and machine architectures that
1356 have not been in working condition in a long time have been removed from
1357 the main source tree maintained by the GNU C Library's maintainers.
1358 These files are now reside in the separate `ports' source module
1359 that is usable as an add-on when building the library.
1363 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1364 interrogate the dynamic linker, compatible with the Solaris interface.
1366 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1367 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1369 * getifaddrs now uses the netlink interface on Linux to get its information.
1370 Implemented by Thorsten Kukuk.
1372 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1373 Implemented by Ulrich Drepper.
1375 * support for non-executable stacks on x86 has been added. Changes mostly
1378 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1381 * getaddrinfo now performs destination address selection according to
1386 * Thread-safe interfaces for many functions that access locale data
1387 were added in version 2.3, but these features were omitted from NEWS.
1388 Many functions have variants with an `_l' suffix that take a `locale_t'
1389 object as a parameter rather than consulting the current locale.
1390 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1391 create and maintain `locale_t' objects. Additionally, the new function
1392 `uselocale' sets "the current locale" (as used by functions not so
1393 parameterized) set for an individual thread. These features were added
1394 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1396 * The functions getresuid, getresgid, setresuid, and setresgid, which
1397 have long been available on Linux, are now declared in <unistd.h>
1398 and are now also available on the Hurd.
1400 * ELF thread-local storage support (TLS) now works on x86-64.
1402 * The new dynamic string token $LIB is expanded in shared library names.
1403 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1405 * Aldy Hernandez contributed complete software floating point support for
1406 PowerPC machines with no FPU.
1408 * fexecve is implemented on Linux.
1410 * The `btowc' function should work at least twice as fast due to
1411 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1413 * With approriate thread add-ons cancelable functions are now implemented
1414 in libc.so as well. No need to call the function in libpthread. This
1415 change allowed to finally disable the incorrect and expensive handling
1416 of weak definition in ld.so.
1418 * Yet more PLT entries in libc.so have been removed. We finally arrived
1419 at the bare minimum. Startup times improved appropriately.
1421 * Support for the new Linux/x86 system call interface was added. The
1422 AT_SYSINFO auxiliary vector entry is recognized and handled.
1426 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1429 * iconv (the program and the interface) now accepts empty names (excluding
1430 options like //TRANSLIT) to mean "use charset of current locale".
1432 * localedef can now transliterate characters in strings which are not in
1433 the provided charmap. The information from the input locale is used.
1435 * Prelinking support was added for ELF targets. This requires additional
1436 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1438 * Read-only stdio streams now use mmap to speed up operation by eliminating
1439 copying and buffer underflows. To use add 'm' to the mode string of
1440 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1442 * The malloc functions were completely rewritten by Wolfram Gloger based
1443 on Doug Lea's malloc-2.7.0.c.
1445 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1446 implementation of regex.
1448 * Bruno Haible upgraded the iconv and locale implementation to support
1451 * Contents of the LC_* and LANG environment variables in the CEN style are
1452 not recognized anymore. It never was used. Change by Ulrich Drepper.
1454 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1455 thread-local storage (TLS) ABI on some platforms.
1456 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1458 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1459 EUC-JISX0213, and TSCII.
1461 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1462 BSD-compatible interface for getting all network interface addresses.
1463 Implementation for IPv4 by Roland McGrath.
1465 * Loading of locale data is faster due to the introduction of a locale
1466 archive. Implemented by Roland McGrath and Ulrich Drepper.
1468 * Startup times are significantly reduced by not using exported functions
1469 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1472 * Steven Munroe contributed a port to PowerPC64/Linux.
1476 * The Hurd now uses the GNU libio implementation of stdio rather than the
1477 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1479 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1480 with the same behavior as the Linux system call of the same name.
1484 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1485 128-bit long double format.
1487 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1488 IBM1161, and IBM1162 charsets.
1490 * Andreas Jaeger contributed a port to x86-64/Linux.
1492 * Peter Bruin contributed a port to PowerPC/Hurd.
1494 * libc functions using I/O streams now can handle wide-oriented streams
1497 * optimizations in the dynamic linker. Binaries created by recent binutils
1498 versions start up quicker due to reduced time spent on relocations.
1500 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1504 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1505 asinh, atanh, j0 for the 128-bit long double format.
1507 * Bruno Haible updated all the code handling Unicode in some form to
1508 support Unicode 3.1.
1510 * Speed of regex for single-byte locales is back to previous levels.
1511 Patch by Isamu Hasegawa.
1513 * Alpha, SPARC, and IA-64 now also using floating stacks.
1515 * Startup time of internationalized applications greatly improved through
1516 iconv cache. Use iconvconfig to generate the cache file.
1517 Contributed by Ulrich Drepper.
1519 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1520 severe performance problems. Patch by David Mosberger.
1522 * The Hurd port got a lot more functionality like AIO, various stdio
1523 extensions, etc. Mainly done by Roland McGrath.
1525 * mtrace can now lookup symbols in shared libraries.
1529 * Intel's IA-64 math library is largely integrated. It provides fast and
1530 accurate implementatations for most basic and standard math functions
1531 in float, double, and long double format.
1533 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1534 and asin for the 96-bit long double format and asin, log, tan for the
1535 128-bit long double format.
1537 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1538 The basic double functions exist today. Contributed by Abraham Ziv
1539 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1540 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1542 * An asynchronous name lookup library was added. The interface is designed
1543 after POSIX AIO. The proposal was circulated beforehand to get comments.
1544 No negative ones came in. Implemented by Ulrich Drepper.
1546 * Port to S390/64bit contributed by Martin Schwidefsky
1547 <schwidefsky@de.ibm.com>.
1549 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1550 of functions for Linux/IA-64.
1552 * The RPC code is now thread safe. Threads can now use the same service
1553 of different services at the same time. Patch by Eric Norum
1554 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1556 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1557 family of functions for Linux/S390.
1559 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1560 of functions for Linux/x86.
1562 * Port to Linux/CRIS contributed by Axis Communications.
1566 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1567 we can now check for namespace violations and missing declarations. The
1568 result is that almost all headers are now Unix-compliant (as defined in
1569 the upcoming XPG6). The negative side is that some programs might need
1570 corrections, too, if they depend on the incorrect form of the headers in
1571 previous versions which defined too many symbols and included too many
1574 * regex now handles multibyte character sets correctly.
1575 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1577 * iconv (the program) does now conform to the upcoming XPG6 and handles
1578 charmaps. Instead of the charset names the path of charmaps can be
1579 provided and the conversion happens based on this data.
1580 Contributed by Ulrich Drepper.
1582 * The locale program now provides detailed information about the installed
1587 only lists the names of the supported locales
1591 provides details such as country, language, and codeset name.
1592 Contributed by Ulrich Drepper.
1596 * The gencat program now parses the input file according to the charset
1597 selected by the LC_CTYPE category. This is important for stateful
1598 character sets. To make generating catalogs easier there is a way
1599 to overwrite the charset selected by the locale: before the first
1600 message or $ quote line the catalog can contain a line like
1602 $ codeset=ISO-8859-2
1604 to select the charset (ISO-8859-2 in this case).
1606 Implemented by Shinya Hanataka and Ulrich Drepper.
1608 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1609 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1610 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1612 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1613 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1615 * The LANGUAGE environment variable is now ignored unless the locale is
1616 changed from the default "C" locale.
1618 * The usual bug fixes.
1622 * Greg McGary added runtime support for bounds checking using gcc's
1623 new -fbounded-pointers option. ix86 target is complete. PowerPC
1626 * Thorsten Kukuk added secure mode support to nscd.
1628 * The Berkeley db libraries have been removed.
1630 Related, the nss_db module is now in a separate package since it
1631 obviously requires a database library being available.
1633 * Wide character I/O streams implemented by Ulrich Drepper.
1635 * Functions from the extended socket API added by Ulrich Drepper.
1637 * Functions feenableexcept and fedisableexcept to control the
1638 behaviour of individual exceptions have been added by Andreas Jaeger.
1640 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1642 * The resolver code has been updated from bind 8.2.3-T5B which supports
1643 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1646 This change could in some situations effect backward compatibility. Since
1647 now `_res' is a thread-local instead of a global variable, modifying it
1648 in one thread does not have any effect in other threads.
1650 The resolver library was also extended to allow IPv6 as the transport
1651 protocol for the requests. This work was done by Stig Venaas.
1653 * Compatibility code for K&R C compilers has been removed from the
1654 header files. A ISO C compiler is needed to use the library
1655 (conforming to either C89 or C99 standard).
1657 * Complete rewrite of the localedef program to support multibyte character
1658 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1659 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1660 Implemented by Ulrich Drepper.
1662 Bruno Haible significantly improved the generation and use of the data
1663 structures for the wide character tables.
1665 * Plural handling in gettext implemented by Ulrich Drepper.
1667 * The utmp daemon has been removed.
1669 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1671 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1674 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1676 * POSIX barriers implemented by Kaz Kylheku.
1678 * POSIX spawn function family implemented by Ulrich Drepper.
1680 * POSIX spinlocks are now available.
1682 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1684 * the configure option --enable-kernel=X.Y.Z allows to strip out
1685 compatibility for kernel versions before X.Y.Z. This is currently only
1686 implemented for Linux.
1688 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1689 field sin6_scope_id. This means that all programs using IPv6 should be
1690 recompiled. Don't expect binary compatibility with previous glibc
1693 * various conversion modules for IBM character sets contributed by
1696 * IA-64 port by Jes Sorensen and HJ Lu.
1710 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1712 * New xdr functions are added; some rpc functions are now 64bit clean.
1714 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1716 * Fixed known incompatibilities with glibc 2.0.
1718 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1720 * Optimized a number of functions (especially the ELF dynamic loader).
1722 * Update timezone data files.
1724 * lots of charmaps corrections
1726 * some new locale definitions and charmaps
1731 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1732 conform to POSIX member type requirements. Symbol versions have been
1733 adjusted as needed within the library, and for direct use by applications,
1734 but there is potential for problems if third-party libraries use
1735 struct timeval as part of their interface. This does not present
1736 a problem for X and other "essential" system libraries.
1738 * An additional locale model to support C++ Standard Library locale
1739 model and probably more was implemented by Ulrich Drepper.
1741 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1744 * Miles Bader provided the `argp' function family to support hierachical
1745 command line argument parsing, layered on top of getopt.
1747 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1749 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1752 * scanf recognizes the %a and %A format for scanning floating point numbers.
1754 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1755 information and interfaces for the available integer types.
1757 * about 130 new math functions were added to implement the ISO C9x math
1760 * the new header <complex.h> contains definitions of the complex math
1761 functions from ISO C 9X.
1763 * the new header <tgmath.h> defines generic macros to use complex or
1764 real valued functions.
1766 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1768 * Andreas Jaeger provided a test suite for the math library.
1770 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1772 * Ulrich Drepper added character set conversion functions (iconv).
1774 * Optimized string functions have been added.
1776 * The localedata addon is now part of glibc.
1778 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1780 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1781 daemon for NSS (nscd).
1783 Missing a better place here are some numbers on improvements. Under
1784 Linux 2.1.125 un-tar-ing the kernel sources takes
1788 using local files 12.19s 6.88s 22.91s
1790 using NIS 13.92s 8.91s 26.34s
1792 using NIS & nscd 10.37s 7.34s 25.30s
1794 using NIS+ 27.57s 30.37s 640.46s
1796 using NIS+ & nscd 10.25s 7.83s 26.51s
1798 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1800 Keep in mind that non-namelookup related operations dominate above times.
1801 It was just a common complain that using NIS+ unpacking the kernel is
1804 [1] The old nscd implementation is not available anymore since it was
1805 distributed with glibc up to version 2.0.98 and thus is now replaced.
1807 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1809 * Mark Kettenis provided a Hesiod NSS module.
1811 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1812 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1814 * rcmd can now handle netgroups (Dick Streefland).
1816 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1819 * Support for the IPv6 protocol has been added to the socket API, as per the
1820 latest draft standards.
1822 * Support for Linux 2.2 has been added.
1824 * Interface changes relative to the latest 2.0.x release:
1825 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1826 addseverity NEW: Unix98
1827 alphasort64 NEW: LFS
1828 argp_err_exit_status NEW: argp, GNU ext
1829 argp_error NEW: argp, GNU ext
1830 argp_failure NEW: argp, GNU ext
1831 argp_help NEW: argp, GNU ext
1832 argp_parse NEW: argp, GNU ext
1833 argp_program_bug_address NEW: argp, GNU ext
1834 argp_program_version NEW: argp, GNU ext
1835 argp_program_version_hook NEW: argp, GNU ext
1836 argp_state_help NEW: argp, GNU ext
1837 argp_usage NEW: argp, GNU ext
1838 authdes_create NEW: Secure RPC
1839 authdes_getucred NEW: Secure RPC
1840 authdes_pk_create NEW: Secure RPC
1841 backtrace NEW: GNU ext.
1842 backtrace_symbols NEW: GNU ext.
1843 backtrace_symbols_fd NEW: GNU ext.
1845 cacosf NEW: ISO C 9x
1846 cacosh NEW: ISO C 9x
1847 cacoshf NEW: ISO C 9x
1848 cacoshl NEW: ISO C 9x
1849 cacosl NEW: ISO C 9x
1856 casinf NEW: ISO C 9x
1857 casinh NEW: ISO C 9x
1858 casinhf NEW: ISO C 9x
1859 casinhl NEW: ISO C 9x
1860 casinl NEW: ISO C 9x
1862 catanf NEW: ISO C 9x
1863 catanh NEW: ISO C 9x
1864 catanhf NEW: ISO C 9x
1865 catanhl NEW: ISO C 9x
1866 catanl NEW: ISO C 9x
1867 cbc_crypt NEW: Secure RPC
1871 ccoshf NEW: ISO C 9x
1872 ccoshl NEW: ISO C 9x
1878 cimagf NEW: ISO C 9x
1879 cimagl NEW: ISO C 9x
1880 clearerr_locked REMOVED
1881 clntunix_create NEW: sunrpc ext
1883 clog10 NEW: ISO C 9x
1884 clog10f NEW: ISO C 9x
1885 clog10l NEW: ISO C 9x
1895 cprojf NEW: ISO C 9x
1896 cprojl NEW: ISO C 9x
1898 crealf NEW: ISO C 9x
1899 creall NEW: ISO C 9x
1904 csinhf NEW: ISO C 9x
1905 csinhl NEW: ISO C 9x
1908 csqrtf NEW: ISO C 9x
1909 csqrtl NEW: ISO C 9x
1913 ctanhf NEW: ISO C 9x
1914 ctanhl NEW: ISO C 9x
1916 des_setparity NEW: Secure RPC
1917 ecb_crypt NEW: Secure RPC
1918 endutxent NEW: Unix98
1920 exp10f NEW: ISO C 9x
1921 exp10l NEW: ISO C 9x
1925 fattach NEW: STREAMS
1926 fdetach NEW: STREAMS
1930 feclearexcept NEW: ISO C 9x
1931 fegetenv NEW: ISO C 9x
1932 fegetexceptflag NEW: ISO C 9x
1933 fegetround NEW: ISO C 9x
1934 feholdexcept NEW: ISO C 9x
1936 feraiseexcept NEW: ISO C 9x
1937 ferror_locked REMOVED
1938 fesetenv NEW: ISO C 9x
1939 fesetexceptflag NEW: ISO C 9x
1940 fesetround NEW: ISO C 9x
1941 fetestexcept NEW: ISO C 9x
1942 feupdateenv NEW: ISO C 9x
1943 fflush_locked REMOVED
1947 fgets_unlocked NEW: GNU ext.
1948 fileno_locked REMOVED
1960 fputc_locked REMOVED
1961 fputs_unlocked NEW: GNU ext.
1962 fread_unlocked NEW: GNU ext.
1967 fstatvfs NEW: Unix98
1971 ftruncate64 NEW: LFS
1973 fwrite_unlocked NEW: GNU ext.
1974 gai_strerror NEW: IPv6
1978 getchar_locked REMOVED
1980 getdate_err NEW: Unix98
1981 getdate_r NEW: GNU ext.
1983 getnameinfo NEW: IPv6
1984 getnetname NEW: Secure RPC
1985 getpmsg NEW: STREAMS
1986 getpt NEW: Unix98 PTY
1987 getrlimit64 NEW: LFS
1988 getutxent NEW: Unix98
1989 getutxid NEW: Unix98
1990 getutxline NEW: Unix98
1991 glob64 NEW: GNU ext.
1992 globfree64 NEW: GNU ext.
1993 gnu_get_libc_release NEW: GNU ext.
1994 gnu_get_libc_version NEW: GNU ext.
1995 grantpt NEW: Unix98 PTY
1996 host2netname NEW: Secure RPC
1998 iconv_close NEW: iconv
1999 iconv_open NEW: iconv
2000 if_freenameindex NEW: IPv6
2001 if_indextoname NEW: IPv6
2002 if_nameindex NEW: IPv6
2003 if_nametoindex NEW: IPv6
2004 in6addr_any NEW: IPv6
2005 in6addr_loopback NEW: IPv6
2006 inet6_isipv4mapped NEW: IPv6
2007 isastream NEW: STREAMS
2008 iswblank NEW: GNU ext.
2009 key_decryptsession NEW: Secure RPC
2010 key_decryptsession_pk NEW: Secure RPC
2011 key_encryptsession NEW: Secure RPC
2012 key_encryptsession_pk NEW: Secure RPC
2013 key_gendes NEW: Secure RPC
2014 key_get_conv NEW: Secure RPC
2015 key_secretkey_is_set NEW: Secure RPC
2016 key_setnet NEW: Secure RPC
2017 key_setsecret NEW: Secure RPC
2018 llrint NEW: ISO C 9x
2019 llrintf NEW: ISO C 9x
2020 llrintl NEW: ISO C 9x
2021 llround NEW: ISO C 9x
2022 llroundf NEW: ISO C 9x
2023 llroundl NEW: ISO C 9x
2028 lrintf NEW: ISO C 9x
2029 lrintl NEW: ISO C 9x
2030 lround NEW: ISO C 9x
2031 lroundf NEW: ISO C 9x
2032 lroundl NEW: ISO C 9x
2034 makecontext NEW: Unix98
2035 mempcpy NEW: GNU ext.
2038 modify_ldt NEW: kernel
2042 nearbyint NEW: ISO C 9x
2043 nearbyintf NEW: ISO C 9x
2044 nearbyintl NEW: ISO C 9x
2045 netname2host NEW: Secure RPC
2046 netname2user NEW: Secure RPC
2047 nexttoward NEW: ISO C 9x
2048 nexttowardf NEW: ISO C 9x
2049 nexttowardl NEW: ISO C 9x
2053 passwd2des NEW: Secure RPC
2055 pow10f NEW: GNU ext.
2056 pow10l NEW: GNU ext.
2059 printf_size NEW: GNU ext.
2060 printf_size_info NEW: GNU ext.
2061 profil_counter REMOVED
2062 pthread_mutexattr_getkind_np REPLACED
2063 pthread_mutexattr_setkind_np REPLACED
2064 ptsname NEW: Unix98 PTY
2065 ptsname_r NEW: Unix98 PTY
2067 putchar_locked REMOVED
2068 putgrent NEW: GNU ext.
2070 putpmsg NEW: STREAMS
2071 pututxline NEW: Unix98
2075 readdir64_r NEW: LFS
2076 remquo NEW: ISO C 9x
2077 remquof NEW: ISO C 9x
2078 remquol NEW: ISO C 9x
2080 roundf NEW: ISO C 9x
2081 roundl NEW: ISO C 9x
2083 scalbln NEW: ISO C 9x
2084 scalblnf NEW: ISO C 9x
2085 scalblnl NEW: ISO C 9x
2087 sendfile NEW: kernel
2088 setcontext NEW: Unix98
2089 setrlimit64 NEW: LFS
2090 setutxent NEW: Unix98
2092 sigignore NEW: Unix98
2093 sigqueue NEW: POSIX.1b
2094 sigrelse NEW: Unix98
2095 sigset NEW: POSIX.1b
2096 sigtimedwait NEW: POSIX.1b
2097 sigwaitinfo NEW: POSIX.1b
2098 sincos NEW: GNU ext.
2099 sincosf NEW: GNU ext.
2100 sincosl NEW: GNU ext.
2104 strcasestr NEW: GNU ext.
2105 strtoimax NEW: ISO C 9x
2106 strtoumax NEW: ISO C 9x
2107 strverscmp NEW: GNU ext.
2108 svcauthdes_stats NEW: Secure RPC
2109 svcunix_create NEW: sunrpc etx
2110 svcunixfd_create NEW: sunrpc ext
2111 swapcontext NEW: Unix98
2112 tcgetsid NEW: Unix98 PTY
2113 tdestroy NEW: GNU ext.
2114 tgamma NEW: ISO C 9x
2115 tgammaf NEW: ISO C 9x
2116 tgammal NEW: ISO C 9x
2120 truncf NEW: ISO C 9x
2121 truncl NEW: ISO C 9x
2123 unlockpt NEW: Unix98 PTY
2124 updwtmpx NEW: Unix98
2125 user2netname NEW: Secure RPC
2126 utmpxname NEW: Unix98
2127 versionsort NEW: GNU ext.
2128 versionsort64 NEW: GNU ext.
2130 wcscasecmp NEW: GNU ext.
2131 wcsncasecmp NEW: GNU ext.
2132 wcsnlen NEW: GNU ext.
2133 wcstoimax NEW: ISO C 9x
2134 wcstoll NEW: ISO C 9x
2135 wcstoull NEW: ISO C 9x
2136 wcstoumax NEW: ISO C 9x
2138 wordexp NEW: POSIX.2
2139 wordfree NEW: POSIX.2
2140 write_profiling REMOVED
2141 xdecrypt NEW: Secure RPC
2142 xdr_authdes_cred NEW: Secure RPC
2143 xdr_authdes_verf NEW: Secure RPC
2144 xdr_cryptkeyarg NEW: Secure RPC
2145 xdr_cryptkeyarg2 NEW: Secure RPC
2146 xdr_cryptkeyres NEW: Secure RPC
2147 xdr_getcredres NEW: Secure RPC
2148 xdr_key_netstarg NEW: Secure RPC
2149 xdr_key_netstres NEW: Secure RPC
2150 xdr_keybuf NEW: Secure RPC
2151 xdr_keystatus NEW: Secure RPC
2152 xdr_netnamestr NEW: Secure RPC
2153 xdr_sizeof NEW: Secure RPC
2154 xdr_unixcred NEW: sunrpc ext
2155 xencrypt NEW: Secure RPC
2156 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2167 * inet_ntoa is thread-safe
2169 * updwtmp is moved from libutil to libc
2171 * rewrite of cbrt function
2173 * update of timezone data
2187 * add atoll function
2189 * fix complex problems in Berkeley DB code
2191 * fix math functions
2195 * fixed lots of header problems (especially Linux/GNU specific)
2197 * dynamic loader preserves all registers
2199 * Roland McGrath provided support for handling of auxiliary objects in
2200 the ELF dynamic loader.
2202 * support for parallel builds is improved
2206 * GNU extensions are no longer declared by default. To enable them you
2207 must define the macro `_GNU_SOURCE' in your program or compile with
2210 * The library has changed from using GNU ld symbol aliases to using weak
2211 symbols where available. The ELF object file format supports weak
2212 symbols; GNU ld also supports weak symbols in the a.out format. (There
2213 is also now support for other GNU ld extensions in ELF. Use the
2214 `--with-elf' option to configure to indicate you have ELF, and
2215 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2216 of many files which contained only symbol aliases, reducing the size of
2217 the source and the compiled library; many other files were renamed to
2218 less cryptic names previously occupied by the symbol alias files.
2219 There is a new header file <elf.h> for programs which operate on
2220 files in the ELF format.
2222 * Converted to Autoconf version 2, so `configure' has more options.
2223 Run `configure --help' to see the details.
2225 * The library can now be configured to build profiling, highly-optimized
2226 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2227 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2228 `configure' enable building these extra libraries. The shared library is
2229 built by default when using both ELF and GNU ld. When shared libraries
2230 are enabled, the new library `-ldl' is available for arbitrary run-time
2231 loading of shared objects; its interface is defined in <dlfcn.h>. The
2232 new header file <link.h> gives access to the internals of the run-time
2233 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2234 application of same name on other systems and it provides information
2235 about dynamically linked binaries.
2237 * The C library now provides the run-time support code for profiling
2238 executables compiled with `-pg'. Programs can control the profiling code
2239 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2240 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2241 the support for this file format was contributed by David Mosberger-Tang.
2243 * The math code has been replaced with a math library based on fdlibm from
2244 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2245 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2246 functions. The math functions now reside in a separate library, so
2247 programs using them will need to use `-lm' their linking commands.
2249 * John C. Bowman contributed optimized ix87 assembler inline functions.
2251 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2252 mechanism similar to that found in Solaris 2. This is now used for the
2253 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2254 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2255 file controls what services are used for each individual database. This
2256 works by loading shared libraries with names specified in `nsswitch.conf',
2257 so service modules can be changed or added at any time without even
2258 relinking any program. Currently there are the file, db, and NIS based
2259 NSS services available.
2261 * The new functions `strtoq' and `strtouq' parse integer values from
2262 strings, like `strtol' and `strtoul', but they return `long long int' and
2263 `unsigned long long int' values, respectively (64-bit quantities).
2265 * The new functions `strtof' and `strtold' parse floating-point values from
2266 strings, like `strtod', but they return `float' and `long double' values,
2267 respectively (on some machines `double' and `long double' are the same).
2269 * Ulrich Drepper has contributed new implementations of the floating-point
2270 printing and reading code used in the `printf' family of functions and
2271 `strtod', `strtof', and `strtold'. These new functions are perfectly
2272 accurate, and much faster than the old ones.
2274 * The implementation of the POSIX locale model was completely rewritten by
2275 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2276 to compile the POSIX locale definition.
2278 * The former dummy implementations of the strcoll and strxfrm function are
2279 now replaced by fully functional code contributed by Ulrich Drepper. The
2280 collation information comes from the POSIX locale definitions.
2282 * The new header <langinfo.h> defines an interface for accessing
2283 various locale-dependent data (using the locale chosen with `setlocale').
2285 * Ulrich Drepper has contributed a new suite of functions for operation on
2286 wide-character and multibyte-character strings, in <wchar.h>;
2287 and classification and case conversion of wide characters, in <wctype.h>.
2288 These new functions are conforming to the ISO C, Amendement 1 specification.
2290 * There is now a second implementation of the standard I/O library available.
2291 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2292 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2294 * You can now use positional parameter specifications in format strings
2295 for the `printf' and `scanf' families of functions. For example,
2296 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2297 ``Number 6, Mr Jones''. This is mainly useful when providing different
2298 format strings for different languages, whose grammars may dictate
2299 different orderings of the values being printed. To support this
2300 feature, the interface for `register_printf_handler' has changed; see
2301 the header file <printf.h> for details.
2303 * The `printf' and `scanf' families of functions now understand a new
2304 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2305 to group numbers as indicated by the locale; for `scanf' and friends, this
2306 says to accept as valid only a number with all the proper grouping
2307 separators in the right places. In the default "C" locale, numbers are
2308 not grouped; but locales for specific countries will define the usual
2309 conventions (i.e. separate thousands with `,' in the US locale).
2311 * The pgrp functions have been regularized, slightly incompatibly but much
2312 less confusingly. The core functions are now `getpgid' and `setpgid',
2313 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2314 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2315 provided for compatibility. There is no longer an incompatible `getpgrp'
2316 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2318 * The new header file <fts.h> and suite of functions simplify programs that
2319 operate on directory trees. This code comes from 4.4 BSD.
2321 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2322 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2323 NSS scheme used in glibc.
2325 * There is a new malloc debugging hook `__memalign_hook'.
2327 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2328 `unsigned int' in <sys/types.h>. These are for compatibility only and
2329 their use is discouraged.
2331 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2332 done differently, so that it works even without GNU ld.
2334 * New function `euidaccess' checks allowed access to a file like `access',
2335 but using the effective IDs instead of the real IDs.
2337 * The time zone data files have been updated for the latest and greatest
2338 local time conventions of the countries of the world.
2340 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2343 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2344 for formatting floating-point numbers. They are provided only for
2345 compatibility; new programs should use `sprintf' instead. There are
2346 also equivalent function for the `long double' floating-point type and
2347 all functions also exist in a reentrant form.
2349 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2350 functions for maintaining the login-record files (primarily of use to
2351 system programs such as `login'), and convenient functions for
2352 allocating and initializing a pseudo-terminal (pty) device.
2354 * Ulrich Drepper has contributed new support for System V style
2355 shared memory and IPC on systems that support it.
2357 * Ulrich Drepper has contributed several miscellaneous new functions found
2358 in System V: The `hsearch' family of functions provide an effective
2359 implementation of hash tables; `a64l' and `l64a' provide a very simple
2360 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2363 * Ulrich Drepper has contributed new reentrant counterparts for the
2364 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2366 * Ulrich Drepper has contributed new, highly-optimized versions of several
2367 string functions for the i486/Pentium family of processors.
2369 * Ulrich Drepper has updated the Linux-specific code, based largely
2370 on work done in Hongjiu Lu's version of GNU libc for Linux.
2371 The GNU library now supports Linux versions 2.0.10 and later,
2372 using the ELF object file format (i[3456]86-*-linux).
2374 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2376 * David Mosberger-Tang and Richard Henderson have ported the C library
2377 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2378 dynamic linking support for ELF/Alpha.
2380 * Richard Henderson contributed several Alpha optimized assembler function
2381 for arithmetic and string handling.
2383 * Ulrich Drepper has contributed a new set of message catalog functions to
2384 support multiple languages using the <libintl.h> interface, for use with
2385 his new package GNU gettext. Translation volunteers have contributed
2386 catalogs of the library's messages in Spanish, German, and Korean.
2388 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2389 program and the `catgets' function for reading the catalog files it
2390 creates. (The <libintl.h> interface is preferred; we include the
2391 <nl_types.h> interface using `catgets' only for source compatibility with
2392 programs already written to use it.)
2394 * New header file <values.h> gives SVID-compatible names for <limits.h>
2397 * Various new macros, declarations, and small header files for compatibility
2400 * New function `group_member' is a convenient way to check if a process has
2401 a given effective group ID.
2403 * When using GCC 2.7 and later, the socket functions are now declared in a
2404 special way so that passing an argument of type `struct sockaddr_in *',
2405 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2406 `struct sockaddr *' type, does not generate a type-clash warning.
2408 * New function `error' declared in header file <error.h> is a convenient
2409 function for printing error messages and optionally exiting; this is the
2410 canonical function used in GNU programs. The new functions `err', `warn',
2411 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2412 doing the same thing.
2414 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2415 POSIX.2 `glob' function to do ~ and {...} expansion.
2417 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2418 `clearenv' which is used in POSIX.9 is also available.
2420 * New function `getsid' returns session ID number on systems that support it.
2422 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2423 files <db.h> and <mpool.h> provide a rich set of functions for several
2424 types of simple databases stored in memory and in files, and <ndbm.h> is
2425 an old `ndbm'-compatible interface using the `db' functions. Link with
2426 `-ldb' to get these functions.
2428 * New macro `strdupa' copies a string like `strdup', but uses local stack
2429 space from `alloca' instead of dynamic heap space from `malloc'.
2431 * New function `strnlen' is like `strlen' but searches only a given maximum
2432 number of characters for the null terminator. `stpncpy', `strndup' and
2433 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2436 * New function `statfs' in header <sys/statfs.h>.
2438 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2439 provide convenient functions for operating on blocks of null-terminated
2442 * A new suite of functions in <utmp.h> handle all the details of reading
2443 and writing the utmp file.
2445 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2448 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2449 completely POSIX compliant and also implemented the extended functionality
2450 to handle alternate digit representation and alternate era date formats.
2452 * Ulrich Drepper provided an implementation of the `strptime' function
2453 defined in XPG4.2 which transforms a string into a `struct tm' value.
2455 * Paul Eggert provided the tzselect shell script as part of the timezone
2456 code. The shell script makes it easy to select the correct timezone
2459 * The implementation of the malloc family of functions is completely replaced
2460 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2461 The implementation uses the mmap function (if available) and it is
2462 optimized for the use in multi threaded programs.
2464 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2465 functions. This new functionality is usable by specifying a special
2466 salt string and it is compatible with implementation on *BSD systems.
2468 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2469 `getsubopt' to handle second level command line options, `bsd_signal'
2470 to access BSD style `signal' functionality, the obsolete `regexp' style
2473 * the `lchown' function is available on system which support this
2476 * The implementation of the shadow password handling function was contributed
2479 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2481 * POSIX.1g support was added. The <sys/select.h> header is available,
2482 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2483 implementation of `getaddrinfo'.
2487 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2489 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2490 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2492 * The new function `daemon' from 4.4 BSD is useful for server programs that
2493 want to put themselves in the background.
2495 * Joel Sherrill has contributed support for several standalone boards that
2496 run without an operating system.
2498 * `printf', `scanf' and friends now accept a `q' type modifier for long
2499 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2501 * All of the code taken from BSD (notably most of the math and networking
2502 routines) has been updated from the BSD 4.4-Lite release.
2504 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2506 * The new functions `getdomainname' and `setdomainname' fetch or change the
2507 YP/NIS domain name. These are system calls which exist on systems which
2510 * The time zone data files have been updated for the latest international
2513 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2514 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2518 * The C library now includes support for Sun RPC, from Sun's free
2519 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2520 are included. (There is still no support for YP.)
2522 * Tom Quinn has contributed a port of the C library to SGI machines running
2523 Irix 4 (mips-sgi-irix4).
2525 * The new `lockf' function is a simplified interface to the locking
2526 facilities of `fcntl', included for compatibility.
2528 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2530 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2532 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2535 * The error message printed by `assert' for a failed assertion now includes
2536 the name of the program (if using GNU ld) and the name of the calling
2537 function (with versions of GCC that support this).
2539 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2541 * The library now includes the <sys/mman.h> header file and memory
2542 management functions `mmap', `munmap', `mprotect', `msync', and
2543 `madvise', on systems that support those facilities.
2545 * The interface for `mcheck' has changed slightly: the function called to
2546 abort the program when an allocation inconsistency is detected now takes
2547 an argument that indicates the type of failure. The new function
2548 `mprobe' lets you request a consistency check for a particular block at
2549 any time (checks are normally done only when you call `free' or `realloc'
2552 * It is now possible to easily cross-compile the C library, building on one
2553 system a library to run on another machine and/or operating system. All
2554 you need to do is set the variable `HOST_CC' in `configparms' to the
2555 native compiler for programs to run on the machine you are building on (a
2556 few generator programs are used on Unix systems); set `CC' to the
2559 * The new function `fexecve' (only implemented on the GNU system) executes
2560 a program file given a file descriptor already open on the file.
2564 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2565 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2567 * You can set the variable `libprefix' in `configparms' to specify a prefix
2568 to be prepended to installed library files; this makes it easy to install
2569 the GNU C library to be linked as `-lgnuc' or whatever.
2571 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2572 copies a limited number of characters from a string, and returns the
2573 address of the last character written.
2575 * You no longer need to check for whether the installed `stddef.h' is
2576 compatible with the GNU C library. configure now checks for you.
2578 * You can now define a per-stream `fileno' function to convert the
2579 stream's cookie into an integral file descriptor.
2581 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2582 allocates zero bytes of storage, and returns a unique pointer which
2583 you can pass to `realloc' or `free'. The behavior is undefined if
2584 you dereference this pointer.
2586 * The C library now runs on Sony NEWS m68k machines running either
2587 NewsOS 3 or NewsOS 4.
2589 * The new `syscall' function is a system-dependent primitive function
2590 for invoking system calls. It has the canonical behavior on Unix
2591 systems, including unreliable return values for some calls (such as
2592 `pipe', `fork' and `getppid').
2594 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2595 to `EAGAIN', which is the preferred name. On systems whose kernels
2596 use two distinct codes, the C library now translates EWOULDBLOCK to
2597 EAGAIN in every system call function.
2601 * The GNU C Library Reference Manual is now distributed with the library.
2602 `make dvi' will produce a DVI file of the printed manual.
2603 `make info' will produce Info files that you can read on line using C-h i
2604 in Emacs or the `info' program.
2605 Please send comments on the manual to bug-glibc-manual@gnu.org.
2607 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2609 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2611 * Jason Merrill has contributed a port to the Sequent Symmetry running
2612 Dynix version 3 (i386-sequent-dynix).
2614 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2615 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2617 * New function `memory_warnings' lets you arrange to get warnings when
2618 malloc is running out of memory to allocate, like Emacs gives you.
2620 * The C library now contains the relocating allocator used in Emacs 19 for
2621 its editing buffers. This allocator (ralloc) minimizes allocation
2622 overhead and fragmentation by moving allocated regions around whenever it
2623 needs to. You always refer to a ralloc'd region with a "handle" (a
2624 pointer to a pointer--an object of type `void **').
2626 * There is a new `printf' format: `%m' gives you the string corresponding
2627 to the error code in `errno'.
2629 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2630 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2631 pass, the `a' modifier says to fill in a `char **' you pass with a
2634 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2635 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2636 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2638 * `mkstemp' is a traditional Unix function to atomically create and open a
2639 uniquely-named temporary file.
2643 * The standard location for the file that says what the local timezone is
2644 has changed again. It is now `/usr/local/etc/localtime' (or more
2645 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2647 * The distribution no longer contains any files with names longer than 14
2650 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2651 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2653 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2657 * The configuration process has changed quite a bit. The `configure'
2658 script is now used just like the configuration scripts for other GNU
2659 packages. The `sysdeps' directory hierarchy is much rearranged.
2660 The file `INSTALL' explains the new scheme in detail.
2662 * The header files no longer need to be processed into ANSI C and
2663 traditional C versions. There is just one set of files to install, and
2664 it will work with ANSI or old C compilers (including `gcc -traditional').
2666 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2667 MIPS DECStation running Ultrix 4.
2669 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2670 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2671 made itself into a shared library.
2673 * Yet further improved support for the i386, running 4.3 BSD-like systems
2674 (such as Mach 3 with the Unix single-server), or System V.
2676 * New function `strncasecmp' to do case-insensitive string comparison
2677 with limited length.
2679 * New function `strsep' is a reentrant alternative to `strtok'.
2681 * New functions `scandir' and `alphasort' for searching directories.
2683 * New function `setenv' is a better interface to `putenv'.
2685 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2686 function for traversing a directory tree.
2688 * The GNU obstack package is now also part of the C library.
2689 The new function `open_obstack_stream' creates a stdio stream that
2690 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2691 formatted output directly to an obstack.
2693 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2694 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2696 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2698 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2699 things to your strings.
2701 * There are some new test programs: test-fseek, testmb, and testrand.
2703 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2704 These ports are not finished, but are a good starting place for really
2705 supporting those systems.
2707 * `/etc/localtime' is now the standard location for the file that says what
2708 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2709 This follows the general principle that `/etc' is the place for all local
2710 configuration files.
2712 * The C library header files now use `extern "C"' when used by the C++
2713 compiler, so the C library should now work with C++ code.
2715 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2716 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2719 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2720 function which uses the `merge sort' algorithm, and is said to be
2721 significantly faster than the old GNU `qsort' function. Merge sort is
2722 now the standard `qsort' function. The new algorithm can require a lot
2723 of temporary storage; so, the old sorting function is called when the
2724 required storage is not available.
2726 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2727 provides the Unix `crypt' function, plus some other entry points.
2729 * The code and header files taken from 4.4 BSD have been updated with the
2730 latest files released from Berkeley.
2732 ----------------------------------------------------------------------
2733 Copyright information:
2735 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2737 Permission is granted to anyone to make or distribute verbatim copies
2738 of this document as received, in any medium, provided that the
2739 copyright notice and this permission notice are preserved,
2740 thus giving the recipient permission to redistribute in turn.
2742 Permission is granted to distribute modified versions
2743 of this document, or of portions of it,
2744 under the above conditions, provided also that they
2745 carry prominent notices stating who last changed them.
2748 version-control: never