1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 16517, 16519, 16520, 16734, 17905, 18084, 18086, 18265, 18480, 18525,
13 18618, 18647, 18661, 18674, 18778, 18781, 18787, 18789, 18790, 18795,
19 * The following bugs are resolved with this release:
21 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
22 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
23 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
24 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
25 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
26 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
27 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
28 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
29 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
30 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
31 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
32 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
33 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
34 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
35 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
36 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
37 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
38 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
39 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
40 18657, 18676, 18694, 18696.
42 * Cache information can be queried via sysconf() function on s390 e.g. with
43 _SC_LEVEL1_ICACHE_SIZE as argument.
45 * A buffer overflow in gethostbyname_r and related functions performing DNS
46 requests has been fixed. If the NSS functions were called with a
47 misaligned buffer, the buffer length change due to pointer alignment was
48 not taken into account. This could result in application crashes or,
49 potentially arbitrary code execution, using crafted, but syntactically
50 valid DNS responses. (CVE-2015-1781)
52 * The time zone file parser has been made more robust against crafted time
53 zone files, avoiding heap buffer overflows related to the processing of
54 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
55 large time zone data files. Overly long time zone specifiers in the TZ
56 variable no longer result in stack overflows and crashes.
58 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
59 for LD and GD on x86 and x86-64, has been implemented. You will need
60 binutils-2.24 or later to enable this optimization.
62 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
63 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
64 Hat). These updates cause user visible changes, such as the fix for bug
67 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
68 and getXXbyYY NSS calls for the same database, causing a denial-of-service
69 condition in some applications.
71 * Added vector math library named libmvec with the following vectorized x86_64
72 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
74 The library can be disabled with --disable-mathvec. Use of the functions is
75 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
76 Shared library libmvec.so is linked in as needed when using -lm (no need to
77 specify -lmvec explicitly for not static builds).
78 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
80 * A new fmemopen implementation has been added with the goal of POSIX
81 compliance. The new implementation fixes the following long-standing
82 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
83 old implementation is still present for use be by existing binaries.
85 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
86 releases. It has been fixed to match 2.19 and older, but binaries built
87 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
89 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
90 Contributed by Roland McGrath (Google).
92 * The header <regexp.h> is deprecated, and will be removed in a future
93 release. Use of this header will trigger a deprecation warning.
94 Application developers should update their code to use <regex.h> instead.
96 This header was formerly part of SUS, but was deprecated in 1994 and
97 removed from the standard in 2001. Also, the glibc implementation
98 leaks memory. See BZ#18681 for more details.
102 * The following bugs are resolved with this release:
104 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
105 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
106 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
107 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
108 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
109 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
110 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
111 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
112 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
113 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
116 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
117 too little memory for the to-be-scanned arguments and overflow the
118 allocated buffer. The implementation now correctly computes the required
119 buffer size when using malloc, and switches to malloc from alloca as
122 * A new semaphore algorithm has been implemented in generic C code for all
123 machines. Previous custom assembly implementations of semaphore were
124 difficult to reason about or ensure that they were safe. The new version
125 of semaphore supports machines with 64-bit or 32-bit atomic operations.
126 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
127 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
129 * Port to Altera Nios II has been contributed by Mentor Graphics.
131 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
132 implementations for powerpc64/powerpc64le.
133 Implemented by Adhemerval Zanella (IBM).
135 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
136 and powerpc64le. This may improve lock scaling of existing programs on
137 HTM capable systems. The lock elision code is only enabled with
138 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
139 powerpc will issue a transaction abort on every syscall to avoid side
140 effects being visible outside transactions.
142 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
143 AArch64. Contributed by ARM Ltd.
145 * i386 memcpy functions optimized with SSE2 unaligned load/store.
147 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
148 under certain input conditions resulting in the execution of a shell for
149 command substitution when the application did not request it. The
150 implementation now checks WRDE_NOCMD immediately before executing the
151 shell and returns the error WRDE_CMDSUB as expected.
153 * CVE-2012-3406 printf-style functions could run into a stack overflow when
154 processing format strings with a large number of format specifiers.
156 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
157 infinite loop if the DNS response contained a PTR record of an unexpected
160 * The minimum GCC version that can be used to build this version of the GNU
161 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
162 still be used to compile programs using the GNU C Library.
164 * The GNU C Library is now built with -Werror by default. This can be
165 disabled by configuring with --disable-werror.
167 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
169 * The obsolete sigvec function has been removed. This was the original
170 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
171 programs have been using instead for about 25 years. Of course, ABI
172 compatibility for old binaries using sigvec remains intact.
174 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
175 with newer versions of bison.
177 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
178 The original MIPS o32 hard-float ABI requires an FPU where double-precision
179 registers overlay two consecutive single-precision registers. MIPS32R2
180 introduced a new FPU mode (FR=1) where double-precision registers extend the
181 corresponding single-precision registers which is incompatible with the
182 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
183 require the use of FR=1 making a transition necessary. New o32 ABI
184 extensions enable users to migrate over time from the original o32 ABI
185 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
186 tracks the ABI of any loaded object and verifies that new objects are
187 compatible. Mode transitions will also be requested as required and
188 unsupportable objects will be rejected. The ABI checks include both soft and
189 hard float ABIs for o32, n32 and n64.
191 GCC 5 with GNU binutils 2.25 onwards:
192 It is strongly recommended that all o32 system libraries are built using the
193 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
194 with the original and all new o32 ABI extensions. Configure a MIPS GCC
195 compiler using --with-fp-32=xx to set this by default.
199 * The following bugs are resolved with this release:
201 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
202 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
203 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
204 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
205 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
206 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
207 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
208 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
209 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
210 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
211 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
212 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
213 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
214 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
215 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
217 * Reverted change of ABI data structures for s390 and s390x:
218 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
219 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
220 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
221 are preserved pointing straight to the same implementation as the old ones.
222 Given that, new callers will simply provide a too-big buffer to these
223 functions. Any applications/libraries out there that embed jmp_buf or
224 ucontext_t in an ABI-relevant data structure that have already been rebuilt
225 against 2.19 headers will have to rebuilt again. This is necessary in any
226 case to revert the breakage in their ABI caused by the glibc change.
228 * Support for file description locks is added to systems running the
229 Linux kernel. The standard file locking interfaces are extended to
230 operate on file descriptions, not file descriptors, via the use of
231 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
232 are associated with an open file instead of a process.
234 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
236 * The minimum Linux kernel version that this version of the GNU C Library
237 can be used with is 2.6.32.
239 * Running the testsuite no longer terminates as soon as a test fails.
240 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
241 with PASS or FAIL lines for individual tests. A summary of the results is
242 printed, including a list of failing lists, and "make check" exits with
243 error status if there were any unexpected failures. "make check
244 stop-on-test-failure=y" may be used to keep the old behavior.
246 * The am33 port, which had not worked for several years, has been removed
249 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
250 supported; they now act the same as _DEFAULT_SOURCE (but generate a
251 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
252 conflicted with POSIX (support for which was removed in 2.19), the
253 interfaces those macros enabled remain available when compiling with
254 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
257 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
259 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
260 This may improve lock scaling of existing programs on TX capable systems.
261 The lock elision code is only built with --enable-lock-elision=yes and
262 then requires a GCC version supporting the TX builtins. With lock elision
263 default mutexes are elided via __builtin_tbegin, if the cpu supports
264 transactions. By default lock elision is not enabled and the elision code
267 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
268 copy the path argument. This allowed programs to cause posix_spawn to
269 deference a dangling pointer, or use an unexpected pathname argument if
270 the string was modified after the posix_spawn_file_actions_addopen
273 * All supported architectures now use the main glibc sysdeps directory
274 instead of some being in a separate "ports" directory (which was
275 distributed separately before glibc 2.17).
277 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
278 On configurations that support it (all Linux configurations), it's now
279 used regardless of the --enable-add-ons switch to configure. It is no
280 longer possible to build such configurations without pthreads support.
282 * Locale names, including those obtained from environment variables (LANG
283 and the LC_* variables), are more tightly checked for proper syntax.
284 setlocale will now fail (with EINVAL) for locale names that are overly
285 long, contain slashes without starting with a slash, or contain ".." path
286 components. (CVE-2014-0475) Previously, some valid locale names were
287 silently replaced with the "C" locale when running in AT_SECURE mode
288 (e.g., in a SUID program). This is no longer necessary because of the
291 * On x86-64, the dynamic linker's lazy-binding support is now compatible
292 with application code using Intel MPX instructions. (With all previous
293 versions, the MPX register state could be clobbered when making calls
294 into or out of a shared library.) Note that while the new dynamic
295 linker is compatible with all known x86 hardware whether or not it
296 supports Intel MPX, some x86 instruction-set emulators might fail to
297 handle the new instruction encodings. This is known to affect Valgrind
298 versions up through 3.9 (but will be fixed in the forthcoming 3.10
299 release), and might affect other tools that do instruction emulation.
301 * Support for loadable gconv transliteration modules has been removed.
302 The support for transliteration modules has been non-functional for
303 over a decade, and the removal is prompted by security defects. The
304 normal gconv conversion modules are still supported. Transliteration
305 with //TRANSLIT is still possible, and the //IGNORE specifier
306 continues to be supported. (CVE-2014-5119)
308 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
309 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
310 resulting a denial-of-service security vulnerability in applications which
311 use functions related to iconv. (CVE-2014-6040)
315 * The following bugs are resolved with this release:
317 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
318 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
319 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
320 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
321 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
322 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
323 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
324 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
325 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
326 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
327 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
328 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
329 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
330 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
331 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
332 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
333 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
334 16431, 16453, 16474, 16506, 16510, 16529
336 * Slovenian translations for glibc messages have been contributed by the
337 Translation Project's Slovenian team of translators.
339 * The public headers no longer use __unused nor __block. This change is to
340 support compiling programs that are derived from BSD sources and use
341 __unused internally, and to support compiling with Clang's -fblock
342 extension which uses __block.
344 * CVE-2012-4412 The strcoll implementation caches indices and rules for
345 large collation sequences to optimize multiple passes. This cache
346 computation may overflow for large collation sequences and may cause a
347 stack or buffer overflow. This is now fixed to use a slower algorithm
348 which does not use a cache if there is an integer overflow.
350 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
351 rules for large collation sequences to optimize multiple passes and falls
352 back to alloca if malloc fails, resulting in a possible stack overflow.
353 The implementation now falls back to an uncached collation sequence lookup
356 * CVE-2013-4788 The pointer guard used for pointer mangling was not
357 initialized for static applications resulting in the security feature
358 being disabled. The pointer guard is now correctly initialized to a
359 random value for static applications. Existing static applications need
360 to be recompiled to take advantage of the fix (bug 15754).
362 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
363 to the d_name member of struct dirent, or omit the terminating NUL
364 character. (Bugzilla #14699).
366 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
367 aligned_alloc functions could allocate too few bytes or corrupt the
368 heap when passed very large allocation size values (Bugzilla #15855,
371 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
372 for AF_INET6 has been fixed (Bugzilla #16072).
374 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
375 pap_CW, quz_PE, the_NP.
377 * Substantially revised locales: gd_GB, ht_HT
379 * The LC_ADDRESS field was updated to support country_car for almost all
382 * ISO 1427 definitions were updated.
384 * ISO 3166 definitions were updated.
386 * The localedef utility now supports --big-endian and --little-endian
387 command-line options to generate locales for a different system from that
388 for which the C library was built.
390 * Binary locale files now only depend on the endianness of the system for
391 which they are generated and not on other properties of that system. As a
392 consequence, binary files generated with new localedef may be incompatible
393 with old versions of the GNU C Library, and binary files generated with
394 old localedef may be incompatible with this version of the GNU C Library,
395 in the following circumstances:
397 + Locale files may be incompatible on m68k systems.
399 + Locale archive files (but not separate files for individual locales) may
400 be incompatible on systems where plain "char" is signed.
402 * The configure option --disable-versioning has been removed. Builds with
403 --disable-versioning had not worked for several years.
405 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
406 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
408 * SystemTap probes for malloc have been introduced.
410 * SystemTap probes for slow multiple precision fallback paths of
411 transcendental functions have been introduced.
413 * Support for powerpc64le has been added.
415 * The soft-float powerpc port now supports e500 processors.
417 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
419 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
420 set of header declarations that are enabled by default, even when other
421 feature test macros or compiler options such as -std=c99 would otherwise
422 disable some of those declarations.
424 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
425 conflict with POSIX. The libbsd-compat library (which was a dummy library
426 that did nothing) has also been removed.
428 * Preliminary documentation about Multi-Thread, Async-Signal and
429 Async-Cancel Safety has been added.
431 * Change of ABI data structures for s390 and s390x:
432 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
433 allow for future hardware extensions. All library functions that accept or
434 return these structures were versioned in order to provide backwards
435 compatibility with existing code. However, not all cases can be handled
436 with interface versioning. If an application embeds either structure into
437 another structure and that structure is passed to another compilation unit
438 which expects the newer larger-sized object then any access to the new
439 fields will result in undefined behaviour. Similarly any access to fields
440 that were moved by the enlarging of the structures will cause undefined
441 behaviour. To fix the undefined behaviour all objects that are part of the
442 final in-memory image must agree on the size of structures, and this may
443 require recompilation.
447 * The following bugs are resolved with this release:
449 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
450 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
451 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
452 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
453 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
454 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
455 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
456 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
457 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
458 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
459 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
460 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
461 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
464 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
465 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
466 Distributions can re-enable building and using pt_chown via the new configure
467 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
468 considerable security risks and should only be used if the distribution
469 understands and accepts the risks.
471 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
474 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
475 fixed (Bugzilla #15330).
477 * Add support for calling C++11 thread_local object destructors on thread
478 and program exit. This needs compiler support for offloading C++11
479 destructor calls to glibc.
481 * Improved worst case performance of libm functions with double inputs and
484 * Support for priority inherited mutexes in pthread condition variables on
485 non-x86 architectures.
487 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
489 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
491 * Optimized string functions for ARM. Implemented by Will Newton and
494 * Optimized libm functions for SPARC. Implemented by David S. Miller.
496 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
499 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
500 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
502 * Added a benchmark framework to track performance of functions in glibc.
504 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
505 It is based on draft TS 18661 and currently enabled as a GNU extension.
507 * On Linux, the clock function now uses the clock_gettime system call
508 for improved precision, rather than old times system call.
510 * Added support for version-3 tz format files. This is needed when using
511 the tz database release 2013e or later, and affects a few unusual cases --
512 currently only TZ='America/Godthab' for time stamps after 2037.
514 * Added new API functions pthread_getattr_default_np and
515 pthread_setattr_default_np to get and set the default pthread
516 attributes of a process.
518 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
519 This may improve lock scaling of existing programs on TSX capable systems.
520 When the --enable-lock-elision=yes parameter is specified at configure
521 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
524 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
525 availability). Implemented by Ryan S. Arnold.
527 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
531 * The following bugs are resolved with this release:
533 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
534 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
535 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
536 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
537 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
538 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
539 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
540 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
541 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
542 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
543 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
544 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
545 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
546 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
547 14879, 14889, 14893, 14898, 14914.
549 * Optimization of memcpy for MIPS.
551 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
552 EMFILE has been fixed (Bugzilla #14889).
554 * The add-on ports collection is now distributed in the "ports" subdirectory
555 of the main GNU C Library distribution, rather than separately.
557 * Port to ARM AArch64 contributed by Linaro.
559 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
560 Optimized versions of memcpy, memset, and memcmp added for System z10 and
562 Implemented by Andreas Krebbel.
564 * The new function secure_getenv allows secure access to the environment,
565 returning NULL if running in a SUID/SGID process. This function replaces
566 the internal function __secure_getenv.
568 * SystemTap static probes have been added into the dynamic linker.
569 Implemented by Gary Benson.
571 * Optimizations of string functions strstr, strcasestr and memmem.
572 Implemented by Maxim Kuvyrkov.
574 * The minimum Linux kernel version that this version of the GNU C Library
575 can be used with is 2.6.16.
577 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
578 powerpc POWER7. Implemented by Will Schmidt.
580 * New configure option --disable-nscd builds the C library such that it
581 never attempts to contact the Name Service Caching Daemon (nscd).
582 New configure option --disable-build-nscd avoids building nscd itself;
583 this is the default if --disable-nscd is used.
585 * Improved support for cross-compilation, including cross-testing and
586 bootstrap builds without a previously built glibc.
588 * Several testsuite tests are now able to test multiple IFUNC variants of an
589 interface, rather than just testing the one that would be chooen by
592 * New configure options --with-bugurl and --with-pkgversion, for
593 distributors to use to embed their bug-reporting and package version
594 information in --help and --version output.
596 * The ttyname and ttyname_r functions on Linux now fall back to searching for
597 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
598 allows creation of chroots without the procfs mounted on /proc.
600 * The `crypt' function now fails if passed salt bytes that violate the
601 specification for those values. On Linux, the `crypt' function will
602 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
603 enabled, and fail on encrypted strings using the MD5 or DES algorithm
604 when the mode is enabled.
606 * The `clock_*' suite of functions (declared in <time.h>) is now available
607 directly in the main C library. Previously it was necessary to link with
608 -lrt to use these functions. This change has the effect that a
609 single-threaded program that uses a function such as `clock_gettime' (and
610 is not linked with -lrt) will no longer implicitly load the pthreads
611 library at runtime and so will not suffer the overheads associated with
612 multi-thread support in other code such as the C++ runtime library.
614 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
619 * The following bugs are resolved with this release:
621 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
622 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
623 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
624 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
625 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
626 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
627 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
628 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
629 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
630 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
631 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
632 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
633 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
634 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
635 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
636 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
637 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
638 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
639 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
640 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
641 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
642 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
645 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
646 configuring glibc with:
647 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
648 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
649 Implemented by H.J. Lu.
653 + define static_assert
655 + do not declare gets
657 + declare at_quick_exit and quick_exit also for ISO C11
659 + aligned_alloc. NB: The code is deliberately allows the size parameter
660 to not be a multiple of the alignment. This is a moronic requirement
661 in the standard but it is only a requirement on the caller, not the
666 + uchar.h support added
668 + CMPLX, CMPLXF, CMPLXL added
670 Implemented by Ulrich Drepper.
672 * Support for the IA-64 has been moved to ports.
674 * Remove support for anything but ELF binary format
676 * Checking versions of poll, ppoll added.
677 Implemented by Ulrich Drepper.
679 * More generic and 64-bit performance optimizations to math functions.
680 Implemented by Ulrich Drepper.
682 * New configure option --enable-obsolete-rpc makes the deprecated RPC
683 headers and functions available at compile time as they were before
684 version 2.14. This option will be removed at some time in the future
685 after the TI-RPC library becomes fully sufficient for the needs of
686 existing applications.
688 * Compatibility code for Linux kernel versions before 2.4 has been removed.
689 Note that glibc is not expected to work with any Linux kernel version
692 * New header <sys/auxv.h> and function getauxval allowing easy access to
693 the AT_* key-value pairs passed from the Linux kernel. The header also
694 defines the HWCAP_* bits associated with the AT_HWCAP key.
696 * New locales: mag_IN
698 * New configure option --enable-systemtap builds SystemTap static probes
699 into libc for setjmp and longjmp and into libpthread for various operations.
700 So far the setjmp/longjmp probes and some of the libpthread probes are
701 provided only for i*86 and x86_64.
702 Implemented by Roland McGrath and Rayson Ho.
704 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
706 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
709 * More optimized functions for SPARC. Implemented by David S. Miller.
711 * Improved support for cross-compilation, especially bootstrap builds
712 without a previously built glibc.
714 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
715 Chris Metcalf from Tilera.
717 * Support for the old ARM ABI has been removed from ports. Only the EABI is
718 now supported for ARM processors.
720 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
721 as the name of the dynamic linker, to distinguish it from the
722 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
724 * Support for CRIS has been removed from ports.
726 * A new class of installed header has been documented for low-level
727 platform-specific functionality. PowerPC added the first instance with a
728 function to provide time base register access. Contributed by Tulio
729 Magno Quites Machado Filho.
731 * ix86 configurations now install header files that are consistent with
732 what x86-64 configurations install. These same header files can be used
733 for -m32, -m64, or -mx32 builds.
734 Contributed by H.J. Lu.
736 * Math library bug fixes. A thorough audit of all open math library bugs was
737 conducted by Joseph Myers. Significant progress was made on many math
738 library bugs resulting in more accurate exceptions and function results.
739 Many thanks to all those that contributed including Andreas Jaeger for his
740 patch review and work on the x87 trigonometric instruction issues.
742 * Timezone data is no longer installed. Timezone-related binaries and scripts
743 will continue to be installed. Users should obtain their timezone data from
744 their distribution provider or from the tzdata package at
745 <ftp://munnari.oz.au/pub/>.
749 * The following bugs are resolved with this release:
751 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
752 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
753 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
754 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
755 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
756 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
757 13484, 13506, 13515, 13523, 13524, 13538, 13540
759 * New program pldd to list loaded object of a process
760 Implemented by Ulrich Drepper.
762 * Add nss_db support back to glibc. No more dependency on Berkeley db
763 and support for initgroups lookups.
764 Implemented by Ulrich Drepper.
766 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
767 Contributed by HJ Lu.
769 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
770 Contributed by HJ Lu.
772 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
773 on x86-32 and x86-64.
774 Contributed by Liubov Dmitrieva.
776 * Optimized strchr and strrchr for SSE on x86-32.
777 Contributed by Liubov Dmitrieva.
779 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
780 for x86-64 and x86-32.
781 Contributed by Liubov Dmitrieva.
783 * New interfaces: scandirat, scandirat64
784 Implemented by Ulrich Drepper.
786 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
787 Implemented by Ulrich Drepper.
789 * nscd now also caches the netgroup database.
790 Implemented by Ulrich Drepper.
792 * Integrate libm with gcc's -ffinite-math-only option.
793 Implemented by Ulrich Drepper.
795 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
796 to math functions. Implemented by Ulrich Drepper.
798 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
799 Implemented by Ulrich Drepper.
801 * New Linux interfaces: process_vm_readv, process_vm_writev
803 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
804 Implemented by Ulrich Drepper.
806 * Optimized nearbyint and strcasecmp for PPC.
807 Implemented by Adhemerval Zanella.
809 * New locales: bho_IN, unm_US, es_CU, ta_LK
813 * The following bugs are resolved with this release:
815 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
816 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
817 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
818 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
819 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
820 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
821 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
822 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
823 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
824 12795, 12811, 12813, 12814, 12841
826 * The RPC implementation in libc is obsoleted. Old programs keep working
827 but new programs cannot be linked with the routines in libc anymore.
828 Programs in need of RPC functionality must be linked against TI-RPC.
829 The TI-RPC implementation is IPv6 enabled and there are other benefits.
831 Visible changes of this change include (obviously) the inability to link
832 programs using RPC functions without referencing the TI-RPC library and the
833 removal of the RPC headers from the glibc headers.
834 Implemented by Ulrich Drepper.
836 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
837 syncfs, setns, sendmmsg
839 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
840 yue_HK, lij_IT, mhr_RU
842 * New encodings: CP770, CP771, CP772, CP773, CP774
844 * New program sotruss to trace calls through PLTs
845 Implemented by Ulrich Drepper.
847 * The malloc hook implementation is marked deprecated and will be removed
848 from the default implementation in the next version. The design never
849 worked ever since the introduction of threads. Even programs which do
850 not create threads themselves can use multiple threads created internally.
854 * The following bugs are resolved with this release:
856 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
857 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
858 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
859 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
862 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
864 * POWER7 optimizations: memset, memcmp, strncmp
866 * New optimized string functions for x86-64: strnlen (SSE2),
867 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
868 Implemented by Ulrich Drepper.
872 * The following bugs are resolved with this release:
874 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
875 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
876 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
877 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
878 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
879 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
880 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
881 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
883 * New interfaces: pthread_getname_np, pthread_setname_np
885 * New Linux interface: recvmmsg
887 * STT_GNU_IFUNC implemented for Sparc by David Miller.
889 * The dynamic linker now recognizes supported ABI versions from the
890 EI_ABIVERSION field in the ELF header.
891 Implemented by Ulrich Drepper.
893 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
894 will not be used to fill in password fields in the passwd.byname replies.
895 Instead it is used to synthesize the shadow.byname table, should it be
896 missing. This is a useful mode in some installations involving Solaris.
897 Implemented by Ulrich Drepper.
899 * New locales: kok_IN, sq_MK, cv_RU
903 * The following bugs are resolved with this release:
905 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
906 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
907 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
908 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
909 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
910 10789, 10817, 10823, 10840, 10847
912 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
914 Implemented by Ulrich Drepper.
916 * Checking version of longjmp added that fails if an uninitialized stack
917 frame would be created. Implemented by Ulrich Drepper.
919 * STT_GNU_IFUNC is now supported in static executables.
920 Implemented by H.J. Lu.
922 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
924 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
925 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
926 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
927 Contributed by H.J. Lu.
929 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
930 Implemented by Ulrich Drepper.
932 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
934 Contributed by H.J. Lu.
936 * Support for fma instruction in AVX on x86-64.
937 Implemented by H.J. Lu and Ulrich Drepper.
939 * AVX support in x86-64 auditing support in ld.so.
940 Implemented by H.J. Lu.
942 * STB_GNU_UNIQUE support added.
943 Implemented by Ulrich Drepper.
945 * Implement second fallback mode for optimized DNS lookup for even more
946 broken environments. If two requests from the same port are not
947 handled correctly close the socket and open a new one before sending
948 the second request. The 'single-request-reopen' option in /etc/resolv.conf
949 can be used to select this mode right away, instead of rediscovering the
950 necessity is every process again.
951 Implemented by Ulrich Drepper.
953 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
954 Implemented by Adam Tkac.
956 * Optimized iconv conversions for S390x.
957 Implemented by Andreas Krebbel.
959 * Using condvars with PI mutexes is now more efficient due to kernel
960 support for requeueing to PI futexes. NPTL support added for x86-64.
961 Implemented by Ulrich Drepper.
963 * New locales: ps_AF, my_MM
967 * The following bugs are resolved with this release:
969 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
970 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
971 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
972 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
973 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
975 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
976 Implemented by Ulrich Drepper.
978 * New Linux interfaces: accept4, fallocate, fallocate64.
979 Implemented by Ulrich Drepper.
981 * Correct declarations of string function when used in C++ code. This
982 could lead to compile errors for invalid C++ code.
984 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
987 * New POSIX 2008 interface: psiginfo
988 Implemented by Ulrich Drepper.
990 * New ISO C++1x interfaces: quick_exit, at_quick_exit
991 Implemented by Ulrich Drepper.
993 * Support for selecting between multiple function definitions at runtime
994 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
996 * The libcrypt library can now use the hash function implementations in
997 NSS. Implemented by Ulrich Drepper.
999 * The malloc implementation can be compiled to be less memory efficient
1000 but higher performing in multi-threaded programs.
1001 Implemented by Ulrich Drepper.
1003 * New locales: nan_TW@latin, ks_IN
1005 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1006 Implemented by Ulrich Drepper.
1008 * Extended printf hook support. It is possible to use user-defined types
1009 and extend existing format specifiers.
1010 Implemented by Ulrich Drepper.
1012 * Handling for group shadow files has been added.
1013 Implemented by Ulrich Drepper.
1015 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1016 servers (the case, e.g., for some people using the built-in DNS
1017 server in ADSL modems/routers). There is a once-per-process timeout
1018 in case of a broken server. To avoid it, users can run nscd or put
1019 'options single-request' in /etc/resolv.conf.
1020 Implemented by Ulrich Drepper.
1024 * The following bugs are resolved with this release:
1026 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1027 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1028 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1029 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1030 6968, 6974, 6980, 6995, 7008, 7009, 7029
1032 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1033 up at the same time. Implemented by Ulrich Drepper.
1035 * TLS descriptors for LD and GD on x86 and x86-64.
1036 Implemented by Alexandre Oliva.
1038 * getaddrinfo now handles DCCP and UDPlite.
1039 Implemented by Ulrich Drepper.
1041 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1042 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1043 Implemented by Ulrich Drepper.
1045 * New implementation of memmem, strstr, and strcasestr which is O(n).
1046 Implemented by Eric Blake.
1048 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1050 * Implement "e" option for popen to open file descriptor with the
1051 close-on-exec flag set. Implemented by Ulrich Drepper.
1053 * Implement "b" mode for fmemopen. In this mode writes writes don't
1054 implicitly add a NUL byte and seeks from the end of the buffer really
1055 use the buffer end, not the string length as the basis.
1056 Implemented by Ulrich Drepper.
1058 * Many functions, exported and internal, now atomically set the close-on-exec
1059 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1061 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1063 Implemented by Pravin Satpute.
1065 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1069 * The following bugs are resolved with this release:
1071 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1072 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1073 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1074 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1075 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1076 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1077 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1079 * New locales: bo_CN, bo_IN, shs_CA.
1081 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1083 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1084 Implemented by Pravin Satpute.
1086 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1088 * nscd caches now all timeouts for DNS entries
1089 Implemented by Ulrich Drepper.
1091 * nscd is more efficient and wakes up less often.
1092 Implemented by Ulrich Drepper.
1094 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1095 vdprintf, and obstack_vprintf.
1096 Implemented by Jakub Jelinek.
1098 * Faster memset for x86-64.
1099 Implemented by Harsha Jagasia and H.J. Lu.
1101 * Faster memcpy on x86.
1102 Implemented by Ulrich Drepper.
1104 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1105 Implemented by Ulrich Drepper.
1107 * Faster sqrt and sqrtf implemention for some PPC variants.
1108 Implemented by Steven Munroe.
1112 * The following bugs are resolved with this release:
1114 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1115 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1116 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1117 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1118 5071, 5103, 5104, 5112, 5113, 5184, 5186
1120 * More checking functions: fread, fread_unlocked, open*, mq_open.
1121 Implemented by Jakub Jelinek and Ulrich Drepper.
1123 * Extend fortification to C++. Implemented by Jakub Jelinek.
1125 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1126 by not recognizing 'a' as a modifier when those specs are requested.
1127 Implemented by Jakub Jelinek.
1129 * PPC optimizations to math and string functions.
1130 Implemented by Steven Munroe.
1132 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1133 options to be passed. Implemented by Ulrich Drepper.
1135 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1137 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1138 Implemented by Ulrich Drepper.
1140 * Handle private futexes in the NPTL implementation.
1141 Implemented by Jakub Jelinek and Ulrich Drepper.
1143 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1144 Implemented by Roland McGrath and Ulrich Drepper.
1146 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1148 * SHA-256 and SHA-512 based password encryption.
1149 Implemented by Ulrich Drepper.
1151 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1152 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1155 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1156 Implemented by Ulrich Drepper.
1160 * The following bugs are resolved with this release:
1162 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1163 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1164 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1165 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1166 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1167 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1168 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1171 * New Linux interfaces: epoll_pwait, sched_getcpu.
1173 * New generic interfaces: strerror_l.
1175 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1179 * The following bugs are resolved with this release:
1181 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1182 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1183 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1184 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1185 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1186 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1187 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1188 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1189 3225, 3251, 3252, 3253, 3273
1191 * For Linux, the sorting of addresses returned by getaddrinfo now also
1192 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1193 Implemented by Ulrich Drepper.
1195 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1196 Implemented by Ulrich Drepper.
1198 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1200 * New iconv module for MIK. Contributed by Alexander Shopov.
1202 * For sites with broken group and/or passwd database, the auto-propagate
1203 option of nscd can prevent creating ID lookup entries from the results
1204 of a name lookup and vice versa. This usually is no problem but some
1205 site might have problems with the default behavior.
1206 Implemented by Ulrich Drepper.
1208 * Iterating over entire database in NIS can be slow. With the
1209 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1210 to trade time for memory. The entire database will be read at once.
1211 Implemented by Ulrich Drepper.
1213 * The interfaces introduced in RFC 3542 have been implemented by
1216 * Support for the new ELF hash table format was added by Ulrich Drepper.
1218 * Support for priority inheritance mutexes added by Jakub Jelinek and
1221 * Support for priority protected mutexes added by Jakub Jelinek.
1223 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1224 or_IN, csb_PL, fy_NL, sr_ME.
1228 * More overflow detection functions.
1230 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1231 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1233 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1234 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1235 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1236 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1237 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1238 by Masahide Washizawa.
1240 * It is now possible to install audit libraries for the dynamic linker using
1241 LD_AUDIT. Implemented by Ulrich Drepper.
1243 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1244 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1245 For a libc and libpthread that works well on Linux 2.4 kernels, we
1246 recommend using the stable 2.3 branch.
1248 * The new function open_wmemstream acts like open_memstream,
1249 but uses a wchar_t wide character buffer.
1251 * The new function ppoll is an improved version of poll, similar to pselect.
1253 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1254 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1255 renameat, unlinkat, linkat, symlinkat, readlinkat.
1257 * New Linux kernel system calls: unshare,
1258 inotify_init, inotify_add_watch, inotify_rm_watch.
1260 * The euidaccess function is now also known by the alias eaccess,
1261 for compatibility with some other systems.
1263 * Timezone data updated to 2006b version.
1267 * The following bugs are resolved with this release:
1269 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1270 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1271 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1272 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1273 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1274 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1276 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1278 * As of this release, GCC 4 can be used to compile the C Library.
1280 * Timezone data updated to 2005m version.
1284 * The following bugs are resolved with this release:
1286 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1287 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1288 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1289 777, 787, 821, 822, 823, 825
1291 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1295 * Support for RFC 3678. Real implementations exist only for Linux so far.
1296 Implemented by Ulrich Drepper.
1298 * nscd can now cache entries persistently. Expiring entries are reloaded.
1299 For speedups the cache can be shared in memory with client processes.
1300 Implemented by Ulrich Drepper.
1302 * nscd can now perform SELinux checks.
1303 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1305 * getaddrinfo queries are now cached. Canonical name lookup is performed
1307 Implemented by Ulrich Drepper.
1309 * The nothrow function attribute is used when headers are used by gcc when
1310 compiling C code. This can avoid significant amounts of exception
1313 * The malloc functions perform more error checking and are stricter when
1314 it comes to reacting on errors. The default action is to terminate
1315 the process after showing an error message. Implemented by Ulrich Drepper.
1317 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1318 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1320 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1321 namespaces using the new function dlmopen(). This feature is of course,
1322 like most other dynamic loading functionality, not available in statically
1323 linked applications. Implemented by Ulrich Drepper.
1325 * Low-overhead boundary checking variants of string and some stdio functions
1326 were added. These are to be used in conjunction with a gcc patch by
1327 Jakub Jelinek which adds calls to these functions if possible.
1328 Implemented by Jakub Jelinek and Ulrich Drepper.
1330 * Old code for several operating systems and machine architectures that
1331 have not been in working condition in a long time have been removed from
1332 the main source tree maintained by the GNU C Library's maintainers.
1333 These files are now reside in the separate `ports' source module
1334 that is usable as an add-on when building the library.
1338 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1339 interrogate the dynamic linker, compatible with the Solaris interface.
1341 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1342 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1344 * getifaddrs now uses the netlink interface on Linux to get its information.
1345 Implemented by Thorsten Kukuk.
1347 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1348 Implemented by Ulrich Drepper.
1350 * support for non-executable stacks on x86 has been added. Changes mostly
1353 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1356 * getaddrinfo now performs destination address selection according to
1361 * Thread-safe interfaces for many functions that access locale data
1362 were added in version 2.3, but these features were omitted from NEWS.
1363 Many functions have variants with an `_l' suffix that take a `locale_t'
1364 object as a parameter rather than consulting the current locale.
1365 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1366 create and maintain `locale_t' objects. Additionally, the new function
1367 `uselocale' sets "the current locale" (as used by functions not so
1368 parameterized) set for an individual thread. These features were added
1369 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1371 * The functions getresuid, getresgid, setresuid, and setresgid, which
1372 have long been available on Linux, are now declared in <unistd.h>
1373 and are now also available on the Hurd.
1375 * ELF thread-local storage support (TLS) now works on x86-64.
1377 * The new dynamic string token $LIB is expanded in shared library names.
1378 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1380 * Aldy Hernandez contributed complete software floating point support for
1381 PowerPC machines with no FPU.
1383 * fexecve is implemented on Linux.
1385 * The `btowc' function should work at least twice as fast due to
1386 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1388 * With approriate thread add-ons cancelable functions are now implemented
1389 in libc.so as well. No need to call the function in libpthread. This
1390 change allowed to finally disable the incorrect and expensive handling
1391 of weak definition in ld.so.
1393 * Yet more PLT entries in libc.so have been removed. We finally arrived
1394 at the bare minimum. Startup times improved appropriately.
1396 * Support for the new Linux/x86 system call interface was added. The
1397 AT_SYSINFO auxiliary vector entry is recognized and handled.
1401 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1404 * iconv (the program and the interface) now accepts empty names (excluding
1405 options like //TRANSLIT) to mean "use charset of current locale".
1407 * localedef can now transliterate characters in strings which are not in
1408 the provided charmap. The information from the input locale is used.
1410 * Prelinking support was added for ELF targets. This requires additional
1411 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1413 * Read-only stdio streams now use mmap to speed up operation by eliminating
1414 copying and buffer underflows. To use add 'm' to the mode string of
1415 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1417 * The malloc functions were completely rewritten by Wolfram Gloger based
1418 on Doug Lea's malloc-2.7.0.c.
1420 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1421 implementation of regex.
1423 * Bruno Haible upgraded the iconv and locale implementation to support
1426 * Contents of the LC_* and LANG environment variables in the CEN style are
1427 not recognized anymore. It never was used. Change by Ulrich Drepper.
1429 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1430 thread-local storage (TLS) ABI on some platforms.
1431 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1433 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1434 EUC-JISX0213, and TSCII.
1436 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1437 BSD-compatible interface for getting all network interface addresses.
1438 Implementation for IPv4 by Roland McGrath.
1440 * Loading of locale data is faster due to the introduction of a locale
1441 archive. Implemented by Roland McGrath and Ulrich Drepper.
1443 * Startup times are significantly reduced by not using exported functions
1444 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1447 * Steven Munroe contributed a port to PowerPC64/Linux.
1451 * The Hurd now uses the GNU libio implementation of stdio rather than the
1452 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1454 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1455 with the same behavior as the Linux system call of the same name.
1459 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1460 128-bit long double format.
1462 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1463 IBM1161, and IBM1162 charsets.
1465 * Andreas Jaeger contributed a port to x86-64/Linux.
1467 * Peter Bruin contributed a port to PowerPC/Hurd.
1469 * libc functions using I/O streams now can handle wide-oriented streams
1472 * optimizations in the dynamic linker. Binaries created by recent binutils
1473 versions start up quicker due to reduced time spent on relocations.
1475 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1479 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1480 asinh, atanh, j0 for the 128-bit long double format.
1482 * Bruno Haible updated all the code handling Unicode in some form to
1483 support Unicode 3.1.
1485 * Speed of regex for single-byte locales is back to previous levels.
1486 Patch by Isamu Hasegawa.
1488 * Alpha, SPARC, and IA-64 now also using floating stacks.
1490 * Startup time of internationalized applications greatly improved through
1491 iconv cache. Use iconvconfig to generate the cache file.
1492 Contributed by Ulrich Drepper.
1494 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1495 severe performance problems. Patch by David Mosberger.
1497 * The Hurd port got a lot more functionality like AIO, various stdio
1498 extensions, etc. Mainly done by Roland McGrath.
1500 * mtrace can now lookup symbols in shared libraries.
1504 * Intel's IA-64 math library is largely integrated. It provides fast and
1505 accurate implementatations for most basic and standard math functions
1506 in float, double, and long double format.
1508 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1509 and asin for the 96-bit long double format and asin, log, tan for the
1510 128-bit long double format.
1512 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1513 The basic double functions exist today. Contributed by Abraham Ziv
1514 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1515 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1517 * An asynchronous name lookup library was added. The interface is designed
1518 after POSIX AIO. The proposal was circulated beforehand to get comments.
1519 No negative ones came in. Implemented by Ulrich Drepper.
1521 * Port to S390/64bit contributed by Martin Schwidefsky
1522 <schwidefsky@de.ibm.com>.
1524 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1525 of functions for Linux/IA-64.
1527 * The RPC code is now thread safe. Threads can now use the same service
1528 of different services at the same time. Patch by Eric Norum
1529 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1531 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1532 family of functions for Linux/S390.
1534 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1535 of functions for Linux/x86.
1537 * Port to Linux/CRIS contributed by Axis Communications.
1541 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1542 we can now check for namespace violations and missing declarations. The
1543 result is that almost all headers are now Unix-compliant (as defined in
1544 the upcoming XPG6). The negative side is that some programs might need
1545 corrections, too, if they depend on the incorrect form of the headers in
1546 previous versions which defined too many symbols and included too many
1549 * regex now handles multibyte character sets correctly.
1550 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1552 * iconv (the program) does now conform to the upcoming XPG6 and handles
1553 charmaps. Instead of the charset names the path of charmaps can be
1554 provided and the conversion happens based on this data.
1555 Contributed by Ulrich Drepper.
1557 * The locale program now provides detailed information about the installed
1562 only lists the names of the supported locales
1566 provides details such as country, language, and codeset name.
1567 Contributed by Ulrich Drepper.
1571 * The gencat program now parses the input file according to the charset
1572 selected by the LC_CTYPE category. This is important for stateful
1573 character sets. To make generating catalogs easier there is a way
1574 to overwrite the charset selected by the locale: before the first
1575 message or $ quote line the catalog can contain a line like
1577 $ codeset=ISO-8859-2
1579 to select the charset (ISO-8859-2 in this case).
1581 Implemented by Shinya Hanataka and Ulrich Drepper.
1583 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1584 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1585 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1587 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1588 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1590 * The LANGUAGE environment variable is now ignored unless the locale is
1591 changed from the default "C" locale.
1593 * The usual bug fixes.
1597 * Greg McGary added runtime support for bounds checking using gcc's
1598 new -fbounded-pointers option. ix86 target is complete. PowerPC
1601 * Thorsten Kukuk added secure mode support to nscd.
1603 * The Berkeley db libraries have been removed.
1605 Related, the nss_db module is now in a separate package since it
1606 obviously requires a database library being available.
1608 * Wide character I/O streams implemented by Ulrich Drepper.
1610 * Functions from the extended socket API added by Ulrich Drepper.
1612 * Functions feenableexcept and fedisableexcept to control the
1613 behaviour of individual exceptions have been added by Andreas Jaeger.
1615 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1617 * The resolver code has been updated from bind 8.2.3-T5B which supports
1618 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1621 This change could in some situations effect backward compatibility. Since
1622 now `_res' is a thread-local instead of a global variable, modifying it
1623 in one thread does not have any effect in other threads.
1625 The resolver library was also extended to allow IPv6 as the transport
1626 protocol for the requests. This work was done by Stig Venaas.
1628 * Compatibility code for K&R C compilers has been removed from the
1629 header files. A ISO C compiler is needed to use the library
1630 (conforming to either C89 or C99 standard).
1632 * Complete rewrite of the localedef program to support multibyte character
1633 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1634 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1635 Implemented by Ulrich Drepper.
1637 Bruno Haible significantly improved the generation and use of the data
1638 structures for the wide character tables.
1640 * Plural handling in gettext implemented by Ulrich Drepper.
1642 * The utmp daemon has been removed.
1644 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1646 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1649 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1651 * POSIX barriers implemented by Kaz Kylheku.
1653 * POSIX spawn function family implemented by Ulrich Drepper.
1655 * POSIX spinlocks are now available.
1657 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1659 * the configure option --enable-kernel=X.Y.Z allows to strip out
1660 compatibility for kernel versions before X.Y.Z. This is currently only
1661 implemented for Linux.
1663 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1664 field sin6_scope_id. This means that all programs using IPv6 should be
1665 recompiled. Don't expect binary compatibility with previous glibc
1668 * various conversion modules for IBM character sets contributed by
1671 * IA-64 port by Jes Sorensen and HJ Lu.
1685 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1687 * New xdr functions are added; some rpc functions are now 64bit clean.
1689 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1691 * Fixed known incompatibilities with glibc 2.0.
1693 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1695 * Optimized a number of functions (especially the ELF dynamic loader).
1697 * Update timezone data files.
1699 * lots of charmaps corrections
1701 * some new locale definitions and charmaps
1706 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1707 conform to POSIX member type requirements. Symbol versions have been
1708 adjusted as needed within the library, and for direct use by applications,
1709 but there is potential for problems if third-party libraries use
1710 struct timeval as part of their interface. This does not present
1711 a problem for X and other "essential" system libraries.
1713 * An additional locale model to support C++ Standard Library locale
1714 model and probably more was implemented by Ulrich Drepper.
1716 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1719 * Miles Bader provided the `argp' function family to support hierachical
1720 command line argument parsing, layered on top of getopt.
1722 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1724 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1727 * scanf recognizes the %a and %A format for scanning floating point numbers.
1729 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1730 information and interfaces for the available integer types.
1732 * about 130 new math functions were added to implement the ISO C9x math
1735 * the new header <complex.h> contains definitions of the complex math
1736 functions from ISO C 9X.
1738 * the new header <tgmath.h> defines generic macros to use complex or
1739 real valued functions.
1741 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1743 * Andreas Jaeger provided a test suite for the math library.
1745 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1747 * Ulrich Drepper added character set conversion functions (iconv).
1749 * Optimized string functions have been added.
1751 * The localedata addon is now part of glibc.
1753 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1755 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1756 daemon for NSS (nscd).
1758 Missing a better place here are some numbers on improvements. Under
1759 Linux 2.1.125 un-tar-ing the kernel sources takes
1763 using local files 12.19s 6.88s 22.91s
1765 using NIS 13.92s 8.91s 26.34s
1767 using NIS & nscd 10.37s 7.34s 25.30s
1769 using NIS+ 27.57s 30.37s 640.46s
1771 using NIS+ & nscd 10.25s 7.83s 26.51s
1773 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1775 Keep in mind that non-namelookup related operations dominate above times.
1776 It was just a common complain that using NIS+ unpacking the kernel is
1779 [1] The old nscd implementation is not available anymore since it was
1780 distributed with glibc up to version 2.0.98 and thus is now replaced.
1782 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1784 * Mark Kettenis provided a Hesiod NSS module.
1786 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1787 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1789 * rcmd can now handle netgroups (Dick Streefland).
1791 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1794 * Support for the IPv6 protocol has been added to the socket API, as per the
1795 latest draft standards.
1797 * Support for Linux 2.2 has been added.
1799 * Interface changes relative to the latest 2.0.x release:
1800 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1801 addseverity NEW: Unix98
1802 alphasort64 NEW: LFS
1803 argp_err_exit_status NEW: argp, GNU ext
1804 argp_error NEW: argp, GNU ext
1805 argp_failure NEW: argp, GNU ext
1806 argp_help NEW: argp, GNU ext
1807 argp_parse NEW: argp, GNU ext
1808 argp_program_bug_address NEW: argp, GNU ext
1809 argp_program_version NEW: argp, GNU ext
1810 argp_program_version_hook NEW: argp, GNU ext
1811 argp_state_help NEW: argp, GNU ext
1812 argp_usage NEW: argp, GNU ext
1813 authdes_create NEW: Secure RPC
1814 authdes_getucred NEW: Secure RPC
1815 authdes_pk_create NEW: Secure RPC
1816 backtrace NEW: GNU ext.
1817 backtrace_symbols NEW: GNU ext.
1818 backtrace_symbols_fd NEW: GNU ext.
1820 cacosf NEW: ISO C 9x
1821 cacosh NEW: ISO C 9x
1822 cacoshf NEW: ISO C 9x
1823 cacoshl NEW: ISO C 9x
1824 cacosl NEW: ISO C 9x
1831 casinf NEW: ISO C 9x
1832 casinh NEW: ISO C 9x
1833 casinhf NEW: ISO C 9x
1834 casinhl NEW: ISO C 9x
1835 casinl NEW: ISO C 9x
1837 catanf NEW: ISO C 9x
1838 catanh NEW: ISO C 9x
1839 catanhf NEW: ISO C 9x
1840 catanhl NEW: ISO C 9x
1841 catanl NEW: ISO C 9x
1842 cbc_crypt NEW: Secure RPC
1846 ccoshf NEW: ISO C 9x
1847 ccoshl NEW: ISO C 9x
1853 cimagf NEW: ISO C 9x
1854 cimagl NEW: ISO C 9x
1855 clearerr_locked REMOVED
1856 clntunix_create NEW: sunrpc ext
1858 clog10 NEW: ISO C 9x
1859 clog10f NEW: ISO C 9x
1860 clog10l NEW: ISO C 9x
1870 cprojf NEW: ISO C 9x
1871 cprojl NEW: ISO C 9x
1873 crealf NEW: ISO C 9x
1874 creall NEW: ISO C 9x
1879 csinhf NEW: ISO C 9x
1880 csinhl NEW: ISO C 9x
1883 csqrtf NEW: ISO C 9x
1884 csqrtl NEW: ISO C 9x
1888 ctanhf NEW: ISO C 9x
1889 ctanhl NEW: ISO C 9x
1891 des_setparity NEW: Secure RPC
1892 ecb_crypt NEW: Secure RPC
1893 endutxent NEW: Unix98
1895 exp10f NEW: ISO C 9x
1896 exp10l NEW: ISO C 9x
1900 fattach NEW: STREAMS
1901 fdetach NEW: STREAMS
1905 feclearexcept NEW: ISO C 9x
1906 fegetenv NEW: ISO C 9x
1907 fegetexceptflag NEW: ISO C 9x
1908 fegetround NEW: ISO C 9x
1909 feholdexcept NEW: ISO C 9x
1911 feraiseexcept NEW: ISO C 9x
1912 ferror_locked REMOVED
1913 fesetenv NEW: ISO C 9x
1914 fesetexceptflag NEW: ISO C 9x
1915 fesetround NEW: ISO C 9x
1916 fetestexcept NEW: ISO C 9x
1917 feupdateenv NEW: ISO C 9x
1918 fflush_locked REMOVED
1922 fgets_unlocked NEW: GNU ext.
1923 fileno_locked REMOVED
1935 fputc_locked REMOVED
1936 fputs_unlocked NEW: GNU ext.
1937 fread_unlocked NEW: GNU ext.
1942 fstatvfs NEW: Unix98
1946 ftruncate64 NEW: LFS
1948 fwrite_unlocked NEW: GNU ext.
1949 gai_strerror NEW: IPv6
1953 getchar_locked REMOVED
1955 getdate_err NEW: Unix98
1956 getdate_r NEW: GNU ext.
1958 getnameinfo NEW: IPv6
1959 getnetname NEW: Secure RPC
1960 getpmsg NEW: STREAMS
1961 getpt NEW: Unix98 PTY
1962 getrlimit64 NEW: LFS
1963 getutxent NEW: Unix98
1964 getutxid NEW: Unix98
1965 getutxline NEW: Unix98
1966 glob64 NEW: GNU ext.
1967 globfree64 NEW: GNU ext.
1968 gnu_get_libc_release NEW: GNU ext.
1969 gnu_get_libc_version NEW: GNU ext.
1970 grantpt NEW: Unix98 PTY
1971 host2netname NEW: Secure RPC
1973 iconv_close NEW: iconv
1974 iconv_open NEW: iconv
1975 if_freenameindex NEW: IPv6
1976 if_indextoname NEW: IPv6
1977 if_nameindex NEW: IPv6
1978 if_nametoindex NEW: IPv6
1979 in6addr_any NEW: IPv6
1980 in6addr_loopback NEW: IPv6
1981 inet6_isipv4mapped NEW: IPv6
1982 isastream NEW: STREAMS
1983 iswblank NEW: GNU ext.
1984 key_decryptsession NEW: Secure RPC
1985 key_decryptsession_pk NEW: Secure RPC
1986 key_encryptsession NEW: Secure RPC
1987 key_encryptsession_pk NEW: Secure RPC
1988 key_gendes NEW: Secure RPC
1989 key_get_conv NEW: Secure RPC
1990 key_secretkey_is_set NEW: Secure RPC
1991 key_setnet NEW: Secure RPC
1992 key_setsecret NEW: Secure RPC
1993 llrint NEW: ISO C 9x
1994 llrintf NEW: ISO C 9x
1995 llrintl NEW: ISO C 9x
1996 llround NEW: ISO C 9x
1997 llroundf NEW: ISO C 9x
1998 llroundl NEW: ISO C 9x
2003 lrintf NEW: ISO C 9x
2004 lrintl NEW: ISO C 9x
2005 lround NEW: ISO C 9x
2006 lroundf NEW: ISO C 9x
2007 lroundl NEW: ISO C 9x
2009 makecontext NEW: Unix98
2010 mempcpy NEW: GNU ext.
2013 modify_ldt NEW: kernel
2017 nearbyint NEW: ISO C 9x
2018 nearbyintf NEW: ISO C 9x
2019 nearbyintl NEW: ISO C 9x
2020 netname2host NEW: Secure RPC
2021 netname2user NEW: Secure RPC
2022 nexttoward NEW: ISO C 9x
2023 nexttowardf NEW: ISO C 9x
2024 nexttowardl NEW: ISO C 9x
2028 passwd2des NEW: Secure RPC
2030 pow10f NEW: GNU ext.
2031 pow10l NEW: GNU ext.
2034 printf_size NEW: GNU ext.
2035 printf_size_info NEW: GNU ext.
2036 profil_counter REMOVED
2037 pthread_mutexattr_getkind_np REPLACED
2038 pthread_mutexattr_setkind_np REPLACED
2039 ptsname NEW: Unix98 PTY
2040 ptsname_r NEW: Unix98 PTY
2042 putchar_locked REMOVED
2043 putgrent NEW: GNU ext.
2045 putpmsg NEW: STREAMS
2046 pututxline NEW: Unix98
2050 readdir64_r NEW: LFS
2051 remquo NEW: ISO C 9x
2052 remquof NEW: ISO C 9x
2053 remquol NEW: ISO C 9x
2055 roundf NEW: ISO C 9x
2056 roundl NEW: ISO C 9x
2058 scalbln NEW: ISO C 9x
2059 scalblnf NEW: ISO C 9x
2060 scalblnl NEW: ISO C 9x
2062 sendfile NEW: kernel
2063 setcontext NEW: Unix98
2064 setrlimit64 NEW: LFS
2065 setutxent NEW: Unix98
2067 sigignore NEW: Unix98
2068 sigqueue NEW: POSIX.1b
2069 sigrelse NEW: Unix98
2070 sigset NEW: POSIX.1b
2071 sigtimedwait NEW: POSIX.1b
2072 sigwaitinfo NEW: POSIX.1b
2073 sincos NEW: GNU ext.
2074 sincosf NEW: GNU ext.
2075 sincosl NEW: GNU ext.
2079 strcasestr NEW: GNU ext.
2080 strtoimax NEW: ISO C 9x
2081 strtoumax NEW: ISO C 9x
2082 strverscmp NEW: GNU ext.
2083 svcauthdes_stats NEW: Secure RPC
2084 svcunix_create NEW: sunrpc etx
2085 svcunixfd_create NEW: sunrpc ext
2086 swapcontext NEW: Unix98
2087 tcgetsid NEW: Unix98 PTY
2088 tdestroy NEW: GNU ext.
2089 tgamma NEW: ISO C 9x
2090 tgammaf NEW: ISO C 9x
2091 tgammal NEW: ISO C 9x
2095 truncf NEW: ISO C 9x
2096 truncl NEW: ISO C 9x
2098 unlockpt NEW: Unix98 PTY
2099 updwtmpx NEW: Unix98
2100 user2netname NEW: Secure RPC
2101 utmpxname NEW: Unix98
2102 versionsort NEW: GNU ext.
2103 versionsort64 NEW: GNU ext.
2105 wcscasecmp NEW: GNU ext.
2106 wcsncasecmp NEW: GNU ext.
2107 wcsnlen NEW: GNU ext.
2108 wcstoimax NEW: ISO C 9x
2109 wcstoll NEW: ISO C 9x
2110 wcstoull NEW: ISO C 9x
2111 wcstoumax NEW: ISO C 9x
2113 wordexp NEW: POSIX.2
2114 wordfree NEW: POSIX.2
2115 write_profiling REMOVED
2116 xdecrypt NEW: Secure RPC
2117 xdr_authdes_cred NEW: Secure RPC
2118 xdr_authdes_verf NEW: Secure RPC
2119 xdr_cryptkeyarg NEW: Secure RPC
2120 xdr_cryptkeyarg2 NEW: Secure RPC
2121 xdr_cryptkeyres NEW: Secure RPC
2122 xdr_getcredres NEW: Secure RPC
2123 xdr_key_netstarg NEW: Secure RPC
2124 xdr_key_netstres NEW: Secure RPC
2125 xdr_keybuf NEW: Secure RPC
2126 xdr_keystatus NEW: Secure RPC
2127 xdr_netnamestr NEW: Secure RPC
2128 xdr_sizeof NEW: Secure RPC
2129 xdr_unixcred NEW: sunrpc ext
2130 xencrypt NEW: Secure RPC
2131 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2142 * inet_ntoa is thread-safe
2144 * updwtmp is moved from libutil to libc
2146 * rewrite of cbrt function
2148 * update of timezone data
2162 * add atoll function
2164 * fix complex problems in Berkeley DB code
2166 * fix math functions
2170 * fixed lots of header problems (especially Linux/GNU specific)
2172 * dynamic loader preserves all registers
2174 * Roland McGrath provided support for handling of auxiliary objects in
2175 the ELF dynamic loader.
2177 * support for parallel builds is improved
2181 * GNU extensions are no longer declared by default. To enable them you
2182 must define the macro `_GNU_SOURCE' in your program or compile with
2185 * The library has changed from using GNU ld symbol aliases to using weak
2186 symbols where available. The ELF object file format supports weak
2187 symbols; GNU ld also supports weak symbols in the a.out format. (There
2188 is also now support for other GNU ld extensions in ELF. Use the
2189 `--with-elf' option to configure to indicate you have ELF, and
2190 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2191 of many files which contained only symbol aliases, reducing the size of
2192 the source and the compiled library; many other files were renamed to
2193 less cryptic names previously occupied by the symbol alias files.
2194 There is a new header file <elf.h> for programs which operate on
2195 files in the ELF format.
2197 * Converted to Autoconf version 2, so `configure' has more options.
2198 Run `configure --help' to see the details.
2200 * The library can now be configured to build profiling, highly-optimized
2201 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2202 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2203 `configure' enable building these extra libraries. The shared library is
2204 built by default when using both ELF and GNU ld. When shared libraries
2205 are enabled, the new library `-ldl' is available for arbitrary run-time
2206 loading of shared objects; its interface is defined in <dlfcn.h>. The
2207 new header file <link.h> gives access to the internals of the run-time
2208 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2209 application of same name on other systems and it provides information
2210 about dynamically linked binaries.
2212 * The C library now provides the run-time support code for profiling
2213 executables compiled with `-pg'. Programs can control the profiling code
2214 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2215 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2216 the support for this file format was contributed by David Mosberger-Tang.
2218 * The math code has been replaced with a math library based on fdlibm from
2219 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2220 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2221 functions. The math functions now reside in a separate library, so
2222 programs using them will need to use `-lm' their linking commands.
2224 * John C. Bowman contributed optimized ix87 assembler inline functions.
2226 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2227 mechanism similar to that found in Solaris 2. This is now used for the
2228 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2229 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2230 file controls what services are used for each individual database. This
2231 works by loading shared libraries with names specified in `nsswitch.conf',
2232 so service modules can be changed or added at any time without even
2233 relinking any program. Currently there are the file, db, and NIS based
2234 NSS services available.
2236 * The new functions `strtoq' and `strtouq' parse integer values from
2237 strings, like `strtol' and `strtoul', but they return `long long int' and
2238 `unsigned long long int' values, respectively (64-bit quantities).
2240 * The new functions `strtof' and `strtold' parse floating-point values from
2241 strings, like `strtod', but they return `float' and `long double' values,
2242 respectively (on some machines `double' and `long double' are the same).
2244 * Ulrich Drepper has contributed new implementations of the floating-point
2245 printing and reading code used in the `printf' family of functions and
2246 `strtod', `strtof', and `strtold'. These new functions are perfectly
2247 accurate, and much faster than the old ones.
2249 * The implementation of the POSIX locale model was completely rewritten by
2250 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2251 to compile the POSIX locale definition.
2253 * The former dummy implementations of the strcoll and strxfrm function are
2254 now replaced by fully functional code contributed by Ulrich Drepper. The
2255 collation information comes from the POSIX locale definitions.
2257 * The new header <langinfo.h> defines an interface for accessing
2258 various locale-dependent data (using the locale chosen with `setlocale').
2260 * Ulrich Drepper has contributed a new suite of functions for operation on
2261 wide-character and multibyte-character strings, in <wchar.h>;
2262 and classification and case conversion of wide characters, in <wctype.h>.
2263 These new functions are conforming to the ISO C, Amendement 1 specification.
2265 * There is now a second implementation of the standard I/O library available.
2266 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2267 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2269 * You can now use positional parameter specifications in format strings
2270 for the `printf' and `scanf' families of functions. For example,
2271 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2272 ``Number 6, Mr Jones''. This is mainly useful when providing different
2273 format strings for different languages, whose grammars may dictate
2274 different orderings of the values being printed. To support this
2275 feature, the interface for `register_printf_handler' has changed; see
2276 the header file <printf.h> for details.
2278 * The `printf' and `scanf' families of functions now understand a new
2279 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2280 to group numbers as indicated by the locale; for `scanf' and friends, this
2281 says to accept as valid only a number with all the proper grouping
2282 separators in the right places. In the default "C" locale, numbers are
2283 not grouped; but locales for specific countries will define the usual
2284 conventions (i.e. separate thousands with `,' in the US locale).
2286 * The pgrp functions have been regularized, slightly incompatibly but much
2287 less confusingly. The core functions are now `getpgid' and `setpgid',
2288 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2289 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2290 provided for compatibility. There is no longer an incompatible `getpgrp'
2291 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2293 * The new header file <fts.h> and suite of functions simplify programs that
2294 operate on directory trees. This code comes from 4.4 BSD.
2296 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2297 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2298 NSS scheme used in glibc.
2300 * There is a new malloc debugging hook `__memalign_hook'.
2302 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2303 `unsigned int' in <sys/types.h>. These are for compatibility only and
2304 their use is discouraged.
2306 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2307 done differently, so that it works even without GNU ld.
2309 * New function `euidaccess' checks allowed access to a file like `access',
2310 but using the effective IDs instead of the real IDs.
2312 * The time zone data files have been updated for the latest and greatest
2313 local time conventions of the countries of the world.
2315 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2318 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2319 for formatting floating-point numbers. They are provided only for
2320 compatibility; new programs should use `sprintf' instead. There are
2321 also equivalent function for the `long double' floating-point type and
2322 all functions also exist in a reentrant form.
2324 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2325 functions for maintaining the login-record files (primarily of use to
2326 system programs such as `login'), and convenient functions for
2327 allocating and initializing a pseudo-terminal (pty) device.
2329 * Ulrich Drepper has contributed new support for System V style
2330 shared memory and IPC on systems that support it.
2332 * Ulrich Drepper has contributed several miscellaneous new functions found
2333 in System V: The `hsearch' family of functions provide an effective
2334 implementation of hash tables; `a64l' and `l64a' provide a very simple
2335 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2338 * Ulrich Drepper has contributed new reentrant counterparts for the
2339 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2341 * Ulrich Drepper has contributed new, highly-optimized versions of several
2342 string functions for the i486/Pentium family of processors.
2344 * Ulrich Drepper has updated the Linux-specific code, based largely
2345 on work done in Hongjiu Lu's version of GNU libc for Linux.
2346 The GNU library now supports Linux versions 2.0.10 and later,
2347 using the ELF object file format (i[3456]86-*-linux).
2349 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2351 * David Mosberger-Tang and Richard Henderson have ported the C library
2352 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2353 dynamic linking support for ELF/Alpha.
2355 * Richard Henderson contributed several Alpha optimized assembler function
2356 for arithmetic and string handling.
2358 * Ulrich Drepper has contributed a new set of message catalog functions to
2359 support multiple languages using the <libintl.h> interface, for use with
2360 his new package GNU gettext. Translation volunteers have contributed
2361 catalogs of the library's messages in Spanish, German, and Korean.
2363 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2364 program and the `catgets' function for reading the catalog files it
2365 creates. (The <libintl.h> interface is preferred; we include the
2366 <nl_types.h> interface using `catgets' only for source compatibility with
2367 programs already written to use it.)
2369 * New header file <values.h> gives SVID-compatible names for <limits.h>
2372 * Various new macros, declarations, and small header files for compatibility
2375 * New function `group_member' is a convenient way to check if a process has
2376 a given effective group ID.
2378 * When using GCC 2.7 and later, the socket functions are now declared in a
2379 special way so that passing an argument of type `struct sockaddr_in *',
2380 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2381 `struct sockaddr *' type, does not generate a type-clash warning.
2383 * New function `error' declared in header file <error.h> is a convenient
2384 function for printing error messages and optionally exiting; this is the
2385 canonical function used in GNU programs. The new functions `err', `warn',
2386 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2387 doing the same thing.
2389 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2390 POSIX.2 `glob' function to do ~ and {...} expansion.
2392 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2393 `clearenv' which is used in POSIX.9 is also available.
2395 * New function `getsid' returns session ID number on systems that support it.
2397 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2398 files <db.h> and <mpool.h> provide a rich set of functions for several
2399 types of simple databases stored in memory and in files, and <ndbm.h> is
2400 an old `ndbm'-compatible interface using the `db' functions. Link with
2401 `-ldb' to get these functions.
2403 * New macro `strdupa' copies a string like `strdup', but uses local stack
2404 space from `alloca' instead of dynamic heap space from `malloc'.
2406 * New function `strnlen' is like `strlen' but searches only a given maximum
2407 number of characters for the null terminator. `stpncpy', `strndup' and
2408 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2411 * New function `statfs' in header <sys/statfs.h>.
2413 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2414 provide convenient functions for operating on blocks of null-terminated
2417 * A new suite of functions in <utmp.h> handle all the details of reading
2418 and writing the utmp file.
2420 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2423 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2424 completely POSIX compliant and also implemented the extended functionality
2425 to handle alternate digit representation and alternate era date formats.
2427 * Ulrich Drepper provided an implementation of the `strptime' function
2428 defined in XPG4.2 which transforms a string into a `struct tm' value.
2430 * Paul Eggert provided the tzselect shell script as part of the timezone
2431 code. The shell script makes it easy to select the correct timezone
2434 * The implementation of the malloc family of functions is completely replaced
2435 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2436 The implementation uses the mmap function (if available) and it is
2437 optimized for the use in multi threaded programs.
2439 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2440 functions. This new functionality is usable by specifying a special
2441 salt string and it is compatible with implementation on *BSD systems.
2443 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2444 `getsubopt' to handle second level command line options, `bsd_signal'
2445 to access BSD style `signal' functionality, the obsolete `regexp' style
2448 * the `lchown' function is available on system which support this
2451 * The implementation of the shadow password handling function was contributed
2454 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2456 * POSIX.1g support was added. The <sys/select.h> header is available,
2457 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2458 implementation of `getaddrinfo'.
2462 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2464 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2465 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2467 * The new function `daemon' from 4.4 BSD is useful for server programs that
2468 want to put themselves in the background.
2470 * Joel Sherrill has contributed support for several standalone boards that
2471 run without an operating system.
2473 * `printf', `scanf' and friends now accept a `q' type modifier for long
2474 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2476 * All of the code taken from BSD (notably most of the math and networking
2477 routines) has been updated from the BSD 4.4-Lite release.
2479 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2481 * The new functions `getdomainname' and `setdomainname' fetch or change the
2482 YP/NIS domain name. These are system calls which exist on systems which
2485 * The time zone data files have been updated for the latest international
2488 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2489 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2493 * The C library now includes support for Sun RPC, from Sun's free
2494 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2495 are included. (There is still no support for YP.)
2497 * Tom Quinn has contributed a port of the C library to SGI machines running
2498 Irix 4 (mips-sgi-irix4).
2500 * The new `lockf' function is a simplified interface to the locking
2501 facilities of `fcntl', included for compatibility.
2503 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2505 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2507 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2510 * The error message printed by `assert' for a failed assertion now includes
2511 the name of the program (if using GNU ld) and the name of the calling
2512 function (with versions of GCC that support this).
2514 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2516 * The library now includes the <sys/mman.h> header file and memory
2517 management functions `mmap', `munmap', `mprotect', `msync', and
2518 `madvise', on systems that support those facilities.
2520 * The interface for `mcheck' has changed slightly: the function called to
2521 abort the program when an allocation inconsistency is detected now takes
2522 an argument that indicates the type of failure. The new function
2523 `mprobe' lets you request a consistency check for a particular block at
2524 any time (checks are normally done only when you call `free' or `realloc'
2527 * It is now possible to easily cross-compile the C library, building on one
2528 system a library to run on another machine and/or operating system. All
2529 you need to do is set the variable `HOST_CC' in `configparms' to the
2530 native compiler for programs to run on the machine you are building on (a
2531 few generator programs are used on Unix systems); set `CC' to the
2534 * The new function `fexecve' (only implemented on the GNU system) executes
2535 a program file given a file descriptor already open on the file.
2539 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2540 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2542 * You can set the variable `libprefix' in `configparms' to specify a prefix
2543 to be prepended to installed library files; this makes it easy to install
2544 the GNU C library to be linked as `-lgnuc' or whatever.
2546 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2547 copies a limited number of characters from a string, and returns the
2548 address of the last character written.
2550 * You no longer need to check for whether the installed `stddef.h' is
2551 compatible with the GNU C library. configure now checks for you.
2553 * You can now define a per-stream `fileno' function to convert the
2554 stream's cookie into an integral file descriptor.
2556 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2557 allocates zero bytes of storage, and returns a unique pointer which
2558 you can pass to `realloc' or `free'. The behavior is undefined if
2559 you dereference this pointer.
2561 * The C library now runs on Sony NEWS m68k machines running either
2562 NewsOS 3 or NewsOS 4.
2564 * The new `syscall' function is a system-dependent primitive function
2565 for invoking system calls. It has the canonical behavior on Unix
2566 systems, including unreliable return values for some calls (such as
2567 `pipe', `fork' and `getppid').
2569 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2570 to `EAGAIN', which is the preferred name. On systems whose kernels
2571 use two distinct codes, the C library now translates EWOULDBLOCK to
2572 EAGAIN in every system call function.
2576 * The GNU C Library Reference Manual is now distributed with the library.
2577 `make dvi' will produce a DVI file of the printed manual.
2578 `make info' will produce Info files that you can read on line using C-h i
2579 in Emacs or the `info' program.
2580 Please send comments on the manual to bug-glibc-manual@gnu.org.
2582 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2584 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2586 * Jason Merrill has contributed a port to the Sequent Symmetry running
2587 Dynix version 3 (i386-sequent-dynix).
2589 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2590 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2592 * New function `memory_warnings' lets you arrange to get warnings when
2593 malloc is running out of memory to allocate, like Emacs gives you.
2595 * The C library now contains the relocating allocator used in Emacs 19 for
2596 its editing buffers. This allocator (ralloc) minimizes allocation
2597 overhead and fragmentation by moving allocated regions around whenever it
2598 needs to. You always refer to a ralloc'd region with a "handle" (a
2599 pointer to a pointer--an object of type `void **').
2601 * There is a new `printf' format: `%m' gives you the string corresponding
2602 to the error code in `errno'.
2604 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2605 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2606 pass, the `a' modifier says to fill in a `char **' you pass with a
2609 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2610 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2611 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2613 * `mkstemp' is a traditional Unix function to atomically create and open a
2614 uniquely-named temporary file.
2618 * The standard location for the file that says what the local timezone is
2619 has changed again. It is now `/usr/local/etc/localtime' (or more
2620 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2622 * The distribution no longer contains any files with names longer than 14
2625 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2626 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2628 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2632 * The configuration process has changed quite a bit. The `configure'
2633 script is now used just like the configuration scripts for other GNU
2634 packages. The `sysdeps' directory hierarchy is much rearranged.
2635 The file `INSTALL' explains the new scheme in detail.
2637 * The header files no longer need to be processed into ANSI C and
2638 traditional C versions. There is just one set of files to install, and
2639 it will work with ANSI or old C compilers (including `gcc -traditional').
2641 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2642 MIPS DECStation running Ultrix 4.
2644 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2645 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2646 made itself into a shared library.
2648 * Yet further improved support for the i386, running 4.3 BSD-like systems
2649 (such as Mach 3 with the Unix single-server), or System V.
2651 * New function `strncasecmp' to do case-insensitive string comparison
2652 with limited length.
2654 * New function `strsep' is a reentrant alternative to `strtok'.
2656 * New functions `scandir' and `alphasort' for searching directories.
2658 * New function `setenv' is a better interface to `putenv'.
2660 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2661 function for traversing a directory tree.
2663 * The GNU obstack package is now also part of the C library.
2664 The new function `open_obstack_stream' creates a stdio stream that
2665 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2666 formatted output directly to an obstack.
2668 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2669 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2671 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2673 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2674 things to your strings.
2676 * There are some new test programs: test-fseek, testmb, and testrand.
2678 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2679 These ports are not finished, but are a good starting place for really
2680 supporting those systems.
2682 * `/etc/localtime' is now the standard location for the file that says what
2683 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2684 This follows the general principle that `/etc' is the place for all local
2685 configuration files.
2687 * The C library header files now use `extern "C"' when used by the C++
2688 compiler, so the C library should now work with C++ code.
2690 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2691 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2694 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2695 function which uses the `merge sort' algorithm, and is said to be
2696 significantly faster than the old GNU `qsort' function. Merge sort is
2697 now the standard `qsort' function. The new algorithm can require a lot
2698 of temporary storage; so, the old sorting function is called when the
2699 required storage is not available.
2701 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2702 provides the Unix `crypt' function, plus some other entry points.
2704 * The code and header files taken from 4.4 BSD have been updated with the
2705 latest files released from Berkeley.
2707 ----------------------------------------------------------------------
2708 Copyright information:
2710 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2712 Permission is granted to anyone to make or distribute verbatim copies
2713 of this document as received, in any medium, provided that the
2714 copyright notice and this permission notice are preserved,
2715 thus giving the recipient permission to redistribute in turn.
2717 Permission is granted to distribute modified versions
2718 of this document, or of portions of it,
2719 under the above conditions, provided also that they
2720 carry prominent notices stating who last changed them.
2723 version-control: never