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:
12 887, 2542, 2543, 2558, 2898, 4404, 6803, 10432, 14341, 14912, 15367,
13 15384, 15786, 15918, 16141, 16296, 16347, 16415, 16517, 16519, 16520,
14 16521, 16620, 16734, 16973, 16985, 17118, 17243, 17244, 17250, 17441,
15 17787, 17886, 17887, 17905, 18084, 18086, 18240, 18265, 18370, 18421,
16 18480, 18525, 18595, 18610, 18618, 18647, 18661, 18674, 18675, 18681,
17 18724, 18757, 18778, 18781, 18787, 18789, 18790, 18795, 18796, 18803,
18 18820, 18823, 18824, 18825, 18857, 18863, 18870, 18872, 18873, 18875,
19 18887, 18921, 18951, 18952, 18956, 18961, 18966, 18967, 18969, 18970,
20 18977, 18980, 18981, 18985, 19003, 19012, 19016, 19018, 19032, 19046,
21 19049, 19050, 19059, 19071, 19076, 19077, 19078, 19079, 19085.
23 * The obsolete header <regexp.h> has been removed. Programs that require
24 this header must be updated to use <regex.h> instead.
26 * Optimized string, wcsmbs and memory functions for IBM z13.
27 Implemented by Stefan Liebler.
31 * The following bugs are resolved with this release:
33 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
34 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
35 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
36 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
37 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
38 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
39 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
40 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
41 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
42 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
43 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
44 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
45 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
46 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
47 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
48 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
49 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
50 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
51 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
52 18657, 18676, 18694, 18696, 18887.
54 * Cache information can be queried via sysconf() function on s390 e.g. with
55 _SC_LEVEL1_ICACHE_SIZE as argument.
57 * A buffer overflow in gethostbyname_r and related functions performing DNS
58 requests has been fixed. If the NSS functions were called with a
59 misaligned buffer, the buffer length change due to pointer alignment was
60 not taken into account. This could result in application crashes or,
61 potentially arbitrary code execution, using crafted, but syntactically
62 valid DNS responses. (CVE-2015-1781)
64 * The time zone file parser has been made more robust against crafted time
65 zone files, avoiding heap buffer overflows related to the processing of
66 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
67 large time zone data files. Overly long time zone specifiers in the TZ
68 variable no longer result in stack overflows and crashes.
70 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
71 for LD and GD on x86 and x86-64, has been implemented. You will need
72 binutils-2.24 or later to enable this optimization.
74 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
75 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
76 Hat). These updates cause user visible changes, such as the fix for bug
79 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
80 and getXXbyYY NSS calls for the same database, causing a denial-of-service
81 condition in some applications.
83 * Added vector math library named libmvec with the following vectorized x86_64
84 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
86 The library can be disabled with --disable-mathvec. Use of the functions is
87 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
88 Shared library libmvec.so is linked in as needed when using -lm (no need to
89 specify -lmvec explicitly for not static builds).
90 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
92 * A new fmemopen implementation has been added with the goal of POSIX
93 compliance. The new implementation fixes the following long-standing
94 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
95 old implementation is still present for use be by existing binaries.
97 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
98 releases. It has been fixed to match 2.19 and older, but binaries built
99 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
101 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
102 Contributed by Roland McGrath (Google).
104 * The header <regexp.h> is deprecated, and will be removed in a future
105 release. Use of this header will trigger a deprecation warning.
106 Application developers should update their code to use <regex.h> instead.
108 This header was formerly part of SUS, but was deprecated in 1994 and
109 removed from the standard in 2001. Also, the glibc implementation
110 leaks memory. See BZ#18681 for more details.
114 * The following bugs are resolved with this release:
116 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
117 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
118 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
119 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
120 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
121 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
122 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
123 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
124 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
125 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
128 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
129 too little memory for the to-be-scanned arguments and overflow the
130 allocated buffer. The implementation now correctly computes the required
131 buffer size when using malloc, and switches to malloc from alloca as
134 * A new semaphore algorithm has been implemented in generic C code for all
135 machines. Previous custom assembly implementations of semaphore were
136 difficult to reason about or ensure that they were safe. The new version
137 of semaphore supports machines with 64-bit or 32-bit atomic operations.
138 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
139 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
141 * Port to Altera Nios II has been contributed by Mentor Graphics.
143 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
144 implementations for powerpc64/powerpc64le.
145 Implemented by Adhemerval Zanella (IBM).
147 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
148 and powerpc64le. This may improve lock scaling of existing programs on
149 HTM capable systems. The lock elision code is only enabled with
150 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
151 powerpc will issue a transaction abort on every syscall to avoid side
152 effects being visible outside transactions.
154 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
155 AArch64. Contributed by ARM Ltd.
157 * i386 memcpy functions optimized with SSE2 unaligned load/store.
159 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
160 under certain input conditions resulting in the execution of a shell for
161 command substitution when the application did not request it. The
162 implementation now checks WRDE_NOCMD immediately before executing the
163 shell and returns the error WRDE_CMDSUB as expected.
165 * CVE-2012-3406 printf-style functions could run into a stack overflow when
166 processing format strings with a large number of format specifiers.
168 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
169 infinite loop if the DNS response contained a PTR record of an unexpected
172 * The minimum GCC version that can be used to build this version of the GNU
173 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
174 still be used to compile programs using the GNU C Library.
176 * The GNU C Library is now built with -Werror by default. This can be
177 disabled by configuring with --disable-werror.
179 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
181 * The obsolete sigvec function has been removed. This was the original
182 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
183 programs have been using instead for about 25 years. Of course, ABI
184 compatibility for old binaries using sigvec remains intact.
186 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
187 with newer versions of bison.
189 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
190 The original MIPS o32 hard-float ABI requires an FPU where double-precision
191 registers overlay two consecutive single-precision registers. MIPS32R2
192 introduced a new FPU mode (FR=1) where double-precision registers extend the
193 corresponding single-precision registers which is incompatible with the
194 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
195 require the use of FR=1 making a transition necessary. New o32 ABI
196 extensions enable users to migrate over time from the original o32 ABI
197 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
198 tracks the ABI of any loaded object and verifies that new objects are
199 compatible. Mode transitions will also be requested as required and
200 unsupportable objects will be rejected. The ABI checks include both soft and
201 hard float ABIs for o32, n32 and n64.
203 GCC 5 with GNU binutils 2.25 onwards:
204 It is strongly recommended that all o32 system libraries are built using the
205 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
206 with the original and all new o32 ABI extensions. Configure a MIPS GCC
207 compiler using --with-fp-32=xx to set this by default.
211 * The following bugs are resolved with this release:
213 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
214 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
215 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
216 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
217 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
218 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
219 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
220 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
221 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
222 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
223 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
224 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
225 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
226 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
227 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
229 * Reverted change of ABI data structures for s390 and s390x:
230 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
231 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
232 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
233 are preserved pointing straight to the same implementation as the old ones.
234 Given that, new callers will simply provide a too-big buffer to these
235 functions. Any applications/libraries out there that embed jmp_buf or
236 ucontext_t in an ABI-relevant data structure that have already been rebuilt
237 against 2.19 headers will have to rebuilt again. This is necessary in any
238 case to revert the breakage in their ABI caused by the glibc change.
240 * Support for file description locks is added to systems running the
241 Linux kernel. The standard file locking interfaces are extended to
242 operate on file descriptions, not file descriptors, via the use of
243 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
244 are associated with an open file instead of a process.
246 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
248 * The minimum Linux kernel version that this version of the GNU C Library
249 can be used with is 2.6.32.
251 * Running the testsuite no longer terminates as soon as a test fails.
252 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
253 with PASS or FAIL lines for individual tests. A summary of the results is
254 printed, including a list of failing lists, and "make check" exits with
255 error status if there were any unexpected failures. "make check
256 stop-on-test-failure=y" may be used to keep the old behavior.
258 * The am33 port, which had not worked for several years, has been removed
261 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
262 supported; they now act the same as _DEFAULT_SOURCE (but generate a
263 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
264 conflicted with POSIX (support for which was removed in 2.19), the
265 interfaces those macros enabled remain available when compiling with
266 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
269 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
271 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
272 This may improve lock scaling of existing programs on TX capable systems.
273 The lock elision code is only built with --enable-lock-elision=yes and
274 then requires a GCC version supporting the TX builtins. With lock elision
275 default mutexes are elided via __builtin_tbegin, if the cpu supports
276 transactions. By default lock elision is not enabled and the elision code
279 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
280 copy the path argument. This allowed programs to cause posix_spawn to
281 deference a dangling pointer, or use an unexpected pathname argument if
282 the string was modified after the posix_spawn_file_actions_addopen
285 * All supported architectures now use the main glibc sysdeps directory
286 instead of some being in a separate "ports" directory (which was
287 distributed separately before glibc 2.17).
289 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
290 On configurations that support it (all Linux configurations), it's now
291 used regardless of the --enable-add-ons switch to configure. It is no
292 longer possible to build such configurations without pthreads support.
294 * Locale names, including those obtained from environment variables (LANG
295 and the LC_* variables), are more tightly checked for proper syntax.
296 setlocale will now fail (with EINVAL) for locale names that are overly
297 long, contain slashes without starting with a slash, or contain ".." path
298 components. (CVE-2014-0475) Previously, some valid locale names were
299 silently replaced with the "C" locale when running in AT_SECURE mode
300 (e.g., in a SUID program). This is no longer necessary because of the
303 * On x86-64, the dynamic linker's lazy-binding support is now compatible
304 with application code using Intel MPX instructions. (With all previous
305 versions, the MPX register state could be clobbered when making calls
306 into or out of a shared library.) Note that while the new dynamic
307 linker is compatible with all known x86 hardware whether or not it
308 supports Intel MPX, some x86 instruction-set emulators might fail to
309 handle the new instruction encodings. This is known to affect Valgrind
310 versions up through 3.9 (but will be fixed in the forthcoming 3.10
311 release), and might affect other tools that do instruction emulation.
313 * Support for loadable gconv transliteration modules has been removed.
314 The support for transliteration modules has been non-functional for
315 over a decade, and the removal is prompted by security defects. The
316 normal gconv conversion modules are still supported. Transliteration
317 with //TRANSLIT is still possible, and the //IGNORE specifier
318 continues to be supported. (CVE-2014-5119)
320 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
321 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
322 resulting a denial-of-service security vulnerability in applications which
323 use functions related to iconv. (CVE-2014-6040)
327 * The following bugs are resolved with this release:
329 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
330 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
331 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
332 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
333 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
334 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
335 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
336 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
337 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
338 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
339 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
340 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
341 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
342 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
343 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
344 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
345 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
346 16431, 16453, 16474, 16506, 16510, 16529
348 * Slovenian translations for glibc messages have been contributed by the
349 Translation Project's Slovenian team of translators.
351 * The public headers no longer use __unused nor __block. This change is to
352 support compiling programs that are derived from BSD sources and use
353 __unused internally, and to support compiling with Clang's -fblock
354 extension which uses __block.
356 * CVE-2012-4412 The strcoll implementation caches indices and rules for
357 large collation sequences to optimize multiple passes. This cache
358 computation may overflow for large collation sequences and may cause a
359 stack or buffer overflow. This is now fixed to use a slower algorithm
360 which does not use a cache if there is an integer overflow.
362 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
363 rules for large collation sequences to optimize multiple passes and falls
364 back to alloca if malloc fails, resulting in a possible stack overflow.
365 The implementation now falls back to an uncached collation sequence lookup
368 * CVE-2013-4788 The pointer guard used for pointer mangling was not
369 initialized for static applications resulting in the security feature
370 being disabled. The pointer guard is now correctly initialized to a
371 random value for static applications. Existing static applications need
372 to be recompiled to take advantage of the fix (bug 15754).
374 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
375 to the d_name member of struct dirent, or omit the terminating NUL
376 character. (Bugzilla #14699).
378 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
379 aligned_alloc functions could allocate too few bytes or corrupt the
380 heap when passed very large allocation size values (Bugzilla #15855,
383 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
384 for AF_INET6 has been fixed (Bugzilla #16072).
386 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
387 pap_CW, quz_PE, the_NP.
389 * Substantially revised locales: gd_GB, ht_HT
391 * The LC_ADDRESS field was updated to support country_car for almost all
394 * ISO 1427 definitions were updated.
396 * ISO 3166 definitions were updated.
398 * The localedef utility now supports --big-endian and --little-endian
399 command-line options to generate locales for a different system from that
400 for which the C library was built.
402 * Binary locale files now only depend on the endianness of the system for
403 which they are generated and not on other properties of that system. As a
404 consequence, binary files generated with new localedef may be incompatible
405 with old versions of the GNU C Library, and binary files generated with
406 old localedef may be incompatible with this version of the GNU C Library,
407 in the following circumstances:
409 + Locale files may be incompatible on m68k systems.
411 + Locale archive files (but not separate files for individual locales) may
412 be incompatible on systems where plain "char" is signed.
414 * The configure option --disable-versioning has been removed. Builds with
415 --disable-versioning had not worked for several years.
417 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
418 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
420 * SystemTap probes for malloc have been introduced.
422 * SystemTap probes for slow multiple precision fallback paths of
423 transcendental functions have been introduced.
425 * Support for powerpc64le has been added.
427 * The soft-float powerpc port now supports e500 processors.
429 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
431 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
432 set of header declarations that are enabled by default, even when other
433 feature test macros or compiler options such as -std=c99 would otherwise
434 disable some of those declarations.
436 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
437 conflict with POSIX. The libbsd-compat library (which was a dummy library
438 that did nothing) has also been removed.
440 * Preliminary documentation about Multi-Thread, Async-Signal and
441 Async-Cancel Safety has been added.
443 * Change of ABI data structures for s390 and s390x:
444 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
445 allow for future hardware extensions. All library functions that accept or
446 return these structures were versioned in order to provide backwards
447 compatibility with existing code. However, not all cases can be handled
448 with interface versioning. If an application embeds either structure into
449 another structure and that structure is passed to another compilation unit
450 which expects the newer larger-sized object then any access to the new
451 fields will result in undefined behaviour. Similarly any access to fields
452 that were moved by the enlarging of the structures will cause undefined
453 behaviour. To fix the undefined behaviour all objects that are part of the
454 final in-memory image must agree on the size of structures, and this may
455 require recompilation.
459 * The following bugs are resolved with this release:
461 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
462 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
463 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
464 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
465 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
466 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
467 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
468 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
469 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
470 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
471 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
472 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
473 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
476 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
477 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
478 Distributions can re-enable building and using pt_chown via the new configure
479 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
480 considerable security risks and should only be used if the distribution
481 understands and accepts the risks.
483 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
486 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
487 fixed (Bugzilla #15330).
489 * Add support for calling C++11 thread_local object destructors on thread
490 and program exit. This needs compiler support for offloading C++11
491 destructor calls to glibc.
493 * Improved worst case performance of libm functions with double inputs and
496 * Support for priority inherited mutexes in pthread condition variables on
497 non-x86 architectures.
499 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
501 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
503 * Optimized string functions for ARM. Implemented by Will Newton and
506 * Optimized libm functions for SPARC. Implemented by David S. Miller.
508 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
511 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
512 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
514 * Added a benchmark framework to track performance of functions in glibc.
516 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
517 It is based on draft TS 18661 and currently enabled as a GNU extension.
519 * On Linux, the clock function now uses the clock_gettime system call
520 for improved precision, rather than old times system call.
522 * Added support for version-3 tz format files. This is needed when using
523 the tz database release 2013e or later, and affects a few unusual cases --
524 currently only TZ='America/Godthab' for time stamps after 2037.
526 * Added new API functions pthread_getattr_default_np and
527 pthread_setattr_default_np to get and set the default pthread
528 attributes of a process.
530 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
531 This may improve lock scaling of existing programs on TSX capable systems.
532 When the --enable-lock-elision=yes parameter is specified at configure
533 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
536 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
537 availability). Implemented by Ryan S. Arnold.
539 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
543 * The following bugs are resolved with this release:
545 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
546 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
547 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
548 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
549 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
550 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
551 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
552 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
553 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
554 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
555 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
556 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
557 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
558 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
559 14879, 14889, 14893, 14898, 14914.
561 * Optimization of memcpy for MIPS.
563 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
564 EMFILE has been fixed (Bugzilla #14889).
566 * The add-on ports collection is now distributed in the "ports" subdirectory
567 of the main GNU C Library distribution, rather than separately.
569 * Port to ARM AArch64 contributed by Linaro.
571 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
572 Optimized versions of memcpy, memset, and memcmp added for System z10 and
574 Implemented by Andreas Krebbel.
576 * The new function secure_getenv allows secure access to the environment,
577 returning NULL if running in a SUID/SGID process. This function replaces
578 the internal function __secure_getenv.
580 * SystemTap static probes have been added into the dynamic linker.
581 Implemented by Gary Benson.
583 * Optimizations of string functions strstr, strcasestr and memmem.
584 Implemented by Maxim Kuvyrkov.
586 * The minimum Linux kernel version that this version of the GNU C Library
587 can be used with is 2.6.16.
589 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
590 powerpc POWER7. Implemented by Will Schmidt.
592 * New configure option --disable-nscd builds the C library such that it
593 never attempts to contact the Name Service Caching Daemon (nscd).
594 New configure option --disable-build-nscd avoids building nscd itself;
595 this is the default if --disable-nscd is used.
597 * Improved support for cross-compilation, including cross-testing and
598 bootstrap builds without a previously built glibc.
600 * Several testsuite tests are now able to test multiple IFUNC variants of an
601 interface, rather than just testing the one that would be chooen by
604 * New configure options --with-bugurl and --with-pkgversion, for
605 distributors to use to embed their bug-reporting and package version
606 information in --help and --version output.
608 * The ttyname and ttyname_r functions on Linux now fall back to searching for
609 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
610 allows creation of chroots without the procfs mounted on /proc.
612 * The `crypt' function now fails if passed salt bytes that violate the
613 specification for those values. On Linux, the `crypt' function will
614 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
615 enabled, and fail on encrypted strings using the MD5 or DES algorithm
616 when the mode is enabled.
618 * The `clock_*' suite of functions (declared in <time.h>) is now available
619 directly in the main C library. Previously it was necessary to link with
620 -lrt to use these functions. This change has the effect that a
621 single-threaded program that uses a function such as `clock_gettime' (and
622 is not linked with -lrt) will no longer implicitly load the pthreads
623 library at runtime and so will not suffer the overheads associated with
624 multi-thread support in other code such as the C++ runtime library.
626 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
631 * The following bugs are resolved with this release:
633 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
634 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
635 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
636 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
637 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
638 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
639 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
640 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
641 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
642 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
643 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
644 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
645 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
646 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
647 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
648 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
649 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
650 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
651 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
652 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
653 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
654 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
657 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
658 configuring glibc with:
659 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
660 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
661 Implemented by H.J. Lu.
665 + define static_assert
667 + do not declare gets
669 + declare at_quick_exit and quick_exit also for ISO C11
671 + aligned_alloc. NB: The code is deliberately allows the size parameter
672 to not be a multiple of the alignment. This is a moronic requirement
673 in the standard but it is only a requirement on the caller, not the
678 + uchar.h support added
680 + CMPLX, CMPLXF, CMPLXL added
682 Implemented by Ulrich Drepper.
684 * Support for the IA-64 has been moved to ports.
686 * Remove support for anything but ELF binary format
688 * Checking versions of poll, ppoll added.
689 Implemented by Ulrich Drepper.
691 * More generic and 64-bit performance optimizations to math functions.
692 Implemented by Ulrich Drepper.
694 * New configure option --enable-obsolete-rpc makes the deprecated RPC
695 headers and functions available at compile time as they were before
696 version 2.14. This option will be removed at some time in the future
697 after the TI-RPC library becomes fully sufficient for the needs of
698 existing applications.
700 * Compatibility code for Linux kernel versions before 2.4 has been removed.
701 Note that glibc is not expected to work with any Linux kernel version
704 * New header <sys/auxv.h> and function getauxval allowing easy access to
705 the AT_* key-value pairs passed from the Linux kernel. The header also
706 defines the HWCAP_* bits associated with the AT_HWCAP key.
708 * New locales: mag_IN
710 * New configure option --enable-systemtap builds SystemTap static probes
711 into libc for setjmp and longjmp and into libpthread for various operations.
712 So far the setjmp/longjmp probes and some of the libpthread probes are
713 provided only for i*86 and x86_64.
714 Implemented by Roland McGrath and Rayson Ho.
716 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
718 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
721 * More optimized functions for SPARC. Implemented by David S. Miller.
723 * Improved support for cross-compilation, especially bootstrap builds
724 without a previously built glibc.
726 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
727 Chris Metcalf from Tilera.
729 * Support for the old ARM ABI has been removed from ports. Only the EABI is
730 now supported for ARM processors.
732 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
733 as the name of the dynamic linker, to distinguish it from the
734 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
736 * Support for CRIS has been removed from ports.
738 * A new class of installed header has been documented for low-level
739 platform-specific functionality. PowerPC added the first instance with a
740 function to provide time base register access. Contributed by Tulio
741 Magno Quites Machado Filho.
743 * ix86 configurations now install header files that are consistent with
744 what x86-64 configurations install. These same header files can be used
745 for -m32, -m64, or -mx32 builds.
746 Contributed by H.J. Lu.
748 * Math library bug fixes. A thorough audit of all open math library bugs was
749 conducted by Joseph Myers. Significant progress was made on many math
750 library bugs resulting in more accurate exceptions and function results.
751 Many thanks to all those that contributed including Andreas Jaeger for his
752 patch review and work on the x87 trigonometric instruction issues.
754 * Timezone data is no longer installed. Timezone-related binaries and scripts
755 will continue to be installed. Users should obtain their timezone data from
756 their distribution provider or from the tzdata package at
757 <ftp://munnari.oz.au/pub/>.
761 * The following bugs are resolved with this release:
763 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
764 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
765 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
766 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
767 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
768 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
769 13484, 13506, 13515, 13523, 13524, 13538, 13540
771 * New program pldd to list loaded object of a process
772 Implemented by Ulrich Drepper.
774 * Add nss_db support back to glibc. No more dependency on Berkeley db
775 and support for initgroups lookups.
776 Implemented by Ulrich Drepper.
778 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
779 Contributed by HJ Lu.
781 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
782 Contributed by HJ Lu.
784 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
785 on x86-32 and x86-64.
786 Contributed by Liubov Dmitrieva.
788 * Optimized strchr and strrchr for SSE on x86-32.
789 Contributed by Liubov Dmitrieva.
791 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
792 for x86-64 and x86-32.
793 Contributed by Liubov Dmitrieva.
795 * New interfaces: scandirat, scandirat64
796 Implemented by Ulrich Drepper.
798 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
799 Implemented by Ulrich Drepper.
801 * nscd now also caches the netgroup database.
802 Implemented by Ulrich Drepper.
804 * Integrate libm with gcc's -ffinite-math-only option.
805 Implemented by Ulrich Drepper.
807 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
808 to math functions. Implemented by Ulrich Drepper.
810 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
811 Implemented by Ulrich Drepper.
813 * New Linux interfaces: process_vm_readv, process_vm_writev
815 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
816 Implemented by Ulrich Drepper.
818 * Optimized nearbyint and strcasecmp for PPC.
819 Implemented by Adhemerval Zanella.
821 * New locales: bho_IN, unm_US, es_CU, ta_LK
825 * The following bugs are resolved with this release:
827 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
828 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
829 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
830 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
831 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
832 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
833 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
834 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
835 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
836 12795, 12811, 12813, 12814, 12841
838 * The RPC implementation in libc is obsoleted. Old programs keep working
839 but new programs cannot be linked with the routines in libc anymore.
840 Programs in need of RPC functionality must be linked against TI-RPC.
841 The TI-RPC implementation is IPv6 enabled and there are other benefits.
843 Visible changes of this change include (obviously) the inability to link
844 programs using RPC functions without referencing the TI-RPC library and the
845 removal of the RPC headers from the glibc headers.
846 Implemented by Ulrich Drepper.
848 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
849 syncfs, setns, sendmmsg
851 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
852 yue_HK, lij_IT, mhr_RU
854 * New encodings: CP770, CP771, CP772, CP773, CP774
856 * New program sotruss to trace calls through PLTs
857 Implemented by Ulrich Drepper.
859 * The malloc hook implementation is marked deprecated and will be removed
860 from the default implementation in the next version. The design never
861 worked ever since the introduction of threads. Even programs which do
862 not create threads themselves can use multiple threads created internally.
866 * The following bugs are resolved with this release:
868 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
869 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
870 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
871 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
874 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
876 * POWER7 optimizations: memset, memcmp, strncmp
878 * New optimized string functions for x86-64: strnlen (SSE2),
879 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
880 Implemented by Ulrich Drepper.
884 * The following bugs are resolved with this release:
886 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
887 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
888 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
889 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
890 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
891 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
892 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
893 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
895 * New interfaces: pthread_getname_np, pthread_setname_np
897 * New Linux interface: recvmmsg
899 * STT_GNU_IFUNC implemented for Sparc by David Miller.
901 * The dynamic linker now recognizes supported ABI versions from the
902 EI_ABIVERSION field in the ELF header.
903 Implemented by Ulrich Drepper.
905 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
906 will not be used to fill in password fields in the passwd.byname replies.
907 Instead it is used to synthesize the shadow.byname table, should it be
908 missing. This is a useful mode in some installations involving Solaris.
909 Implemented by Ulrich Drepper.
911 * New locales: kok_IN, sq_MK, cv_RU
915 * The following bugs are resolved with this release:
917 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
918 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
919 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
920 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
921 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
922 10789, 10817, 10823, 10840, 10847
924 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
926 Implemented by Ulrich Drepper.
928 * Checking version of longjmp added that fails if an uninitialized stack
929 frame would be created. Implemented by Ulrich Drepper.
931 * STT_GNU_IFUNC is now supported in static executables.
932 Implemented by H.J. Lu.
934 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
936 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
937 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
938 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
939 Contributed by H.J. Lu.
941 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
942 Implemented by Ulrich Drepper.
944 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
946 Contributed by H.J. Lu.
948 * Support for fma instruction in AVX on x86-64.
949 Implemented by H.J. Lu and Ulrich Drepper.
951 * AVX support in x86-64 auditing support in ld.so.
952 Implemented by H.J. Lu.
954 * STB_GNU_UNIQUE support added.
955 Implemented by Ulrich Drepper.
957 * Implement second fallback mode for optimized DNS lookup for even more
958 broken environments. If two requests from the same port are not
959 handled correctly close the socket and open a new one before sending
960 the second request. The 'single-request-reopen' option in /etc/resolv.conf
961 can be used to select this mode right away, instead of rediscovering the
962 necessity is every process again.
963 Implemented by Ulrich Drepper.
965 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
966 Implemented by Adam Tkac.
968 * Optimized iconv conversions for S390x.
969 Implemented by Andreas Krebbel.
971 * Using condvars with PI mutexes is now more efficient due to kernel
972 support for requeueing to PI futexes. NPTL support added for x86-64.
973 Implemented by Ulrich Drepper.
975 * New locales: ps_AF, my_MM
979 * The following bugs are resolved with this release:
981 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
982 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
983 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
984 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
985 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
987 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
988 Implemented by Ulrich Drepper.
990 * New Linux interfaces: accept4, fallocate, fallocate64.
991 Implemented by Ulrich Drepper.
993 * Correct declarations of string function when used in C++ code. This
994 could lead to compile errors for invalid C++ code.
996 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
999 * New POSIX 2008 interface: psiginfo
1000 Implemented by Ulrich Drepper.
1002 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1003 Implemented by Ulrich Drepper.
1005 * Support for selecting between multiple function definitions at runtime
1006 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1008 * The libcrypt library can now use the hash function implementations in
1009 NSS. Implemented by Ulrich Drepper.
1011 * The malloc implementation can be compiled to be less memory efficient
1012 but higher performing in multi-threaded programs.
1013 Implemented by Ulrich Drepper.
1015 * New locales: nan_TW@latin, ks_IN
1017 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1018 Implemented by Ulrich Drepper.
1020 * Extended printf hook support. It is possible to use user-defined types
1021 and extend existing format specifiers.
1022 Implemented by Ulrich Drepper.
1024 * Handling for group shadow files has been added.
1025 Implemented by Ulrich Drepper.
1027 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1028 servers (the case, e.g., for some people using the built-in DNS
1029 server in ADSL modems/routers). There is a once-per-process timeout
1030 in case of a broken server. To avoid it, users can run nscd or put
1031 'options single-request' in /etc/resolv.conf.
1032 Implemented by Ulrich Drepper.
1036 * The following bugs are resolved with this release:
1038 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1039 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1040 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1041 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1042 6968, 6974, 6980, 6995, 7008, 7009, 7029
1044 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1045 up at the same time. Implemented by Ulrich Drepper.
1047 * TLS descriptors for LD and GD on x86 and x86-64.
1048 Implemented by Alexandre Oliva.
1050 * getaddrinfo now handles DCCP and UDPlite.
1051 Implemented by Ulrich Drepper.
1053 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1054 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1055 Implemented by Ulrich Drepper.
1057 * New implementation of memmem, strstr, and strcasestr which is O(n).
1058 Implemented by Eric Blake.
1060 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1062 * Implement "e" option for popen to open file descriptor with the
1063 close-on-exec flag set. Implemented by Ulrich Drepper.
1065 * Implement "b" mode for fmemopen. In this mode writes writes don't
1066 implicitly add a NUL byte and seeks from the end of the buffer really
1067 use the buffer end, not the string length as the basis.
1068 Implemented by Ulrich Drepper.
1070 * Many functions, exported and internal, now atomically set the close-on-exec
1071 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1073 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1075 Implemented by Pravin Satpute.
1077 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1081 * The following bugs are resolved with this release:
1083 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1084 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1085 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1086 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1087 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1088 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1089 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1091 * New locales: bo_CN, bo_IN, shs_CA.
1093 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1095 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1096 Implemented by Pravin Satpute.
1098 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1100 * nscd caches now all timeouts for DNS entries
1101 Implemented by Ulrich Drepper.
1103 * nscd is more efficient and wakes up less often.
1104 Implemented by Ulrich Drepper.
1106 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1107 vdprintf, and obstack_vprintf.
1108 Implemented by Jakub Jelinek.
1110 * Faster memset for x86-64.
1111 Implemented by Harsha Jagasia and H.J. Lu.
1113 * Faster memcpy on x86.
1114 Implemented by Ulrich Drepper.
1116 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1117 Implemented by Ulrich Drepper.
1119 * Faster sqrt and sqrtf implemention for some PPC variants.
1120 Implemented by Steven Munroe.
1124 * The following bugs are resolved with this release:
1126 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1127 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1128 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1129 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1130 5071, 5103, 5104, 5112, 5113, 5184, 5186
1132 * More checking functions: fread, fread_unlocked, open*, mq_open.
1133 Implemented by Jakub Jelinek and Ulrich Drepper.
1135 * Extend fortification to C++. Implemented by Jakub Jelinek.
1137 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1138 by not recognizing 'a' as a modifier when those specs are requested.
1139 Implemented by Jakub Jelinek.
1141 * PPC optimizations to math and string functions.
1142 Implemented by Steven Munroe.
1144 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1145 options to be passed. Implemented by Ulrich Drepper.
1147 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1149 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1150 Implemented by Ulrich Drepper.
1152 * Handle private futexes in the NPTL implementation.
1153 Implemented by Jakub Jelinek and Ulrich Drepper.
1155 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1156 Implemented by Roland McGrath and Ulrich Drepper.
1158 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1160 * SHA-256 and SHA-512 based password encryption.
1161 Implemented by Ulrich Drepper.
1163 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1164 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1167 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1168 Implemented by Ulrich Drepper.
1172 * The following bugs are resolved with this release:
1174 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1175 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1176 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1177 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1178 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1179 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1180 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1183 * New Linux interfaces: epoll_pwait, sched_getcpu.
1185 * New generic interfaces: strerror_l.
1187 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1191 * The following bugs are resolved with this release:
1193 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1194 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1195 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1196 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1197 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1198 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1199 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1200 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1201 3225, 3251, 3252, 3253, 3273
1203 * For Linux, the sorting of addresses returned by getaddrinfo now also
1204 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1205 Implemented by Ulrich Drepper.
1207 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1208 Implemented by Ulrich Drepper.
1210 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1212 * New iconv module for MIK. Contributed by Alexander Shopov.
1214 * For sites with broken group and/or passwd database, the auto-propagate
1215 option of nscd can prevent creating ID lookup entries from the results
1216 of a name lookup and vice versa. This usually is no problem but some
1217 site might have problems with the default behavior.
1218 Implemented by Ulrich Drepper.
1220 * Iterating over entire database in NIS can be slow. With the
1221 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1222 to trade time for memory. The entire database will be read at once.
1223 Implemented by Ulrich Drepper.
1225 * The interfaces introduced in RFC 3542 have been implemented by
1228 * Support for the new ELF hash table format was added by Ulrich Drepper.
1230 * Support for priority inheritance mutexes added by Jakub Jelinek and
1233 * Support for priority protected mutexes added by Jakub Jelinek.
1235 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1236 or_IN, csb_PL, fy_NL, sr_ME.
1240 * More overflow detection functions.
1242 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1243 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1245 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1246 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1247 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1248 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1249 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1250 by Masahide Washizawa.
1252 * It is now possible to install audit libraries for the dynamic linker using
1253 LD_AUDIT. Implemented by Ulrich Drepper.
1255 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1256 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1257 For a libc and libpthread that works well on Linux 2.4 kernels, we
1258 recommend using the stable 2.3 branch.
1260 * The new function open_wmemstream acts like open_memstream,
1261 but uses a wchar_t wide character buffer.
1263 * The new function ppoll is an improved version of poll, similar to pselect.
1265 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1266 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1267 renameat, unlinkat, linkat, symlinkat, readlinkat.
1269 * New Linux kernel system calls: unshare,
1270 inotify_init, inotify_add_watch, inotify_rm_watch.
1272 * The euidaccess function is now also known by the alias eaccess,
1273 for compatibility with some other systems.
1275 * Timezone data updated to 2006b version.
1279 * The following bugs are resolved with this release:
1281 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1282 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1283 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1284 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1285 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1286 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1288 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1290 * As of this release, GCC 4 can be used to compile the C Library.
1292 * Timezone data updated to 2005m version.
1296 * The following bugs are resolved with this release:
1298 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1299 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1300 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1301 777, 787, 821, 822, 823, 825
1303 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1307 * Support for RFC 3678. Real implementations exist only for Linux so far.
1308 Implemented by Ulrich Drepper.
1310 * nscd can now cache entries persistently. Expiring entries are reloaded.
1311 For speedups the cache can be shared in memory with client processes.
1312 Implemented by Ulrich Drepper.
1314 * nscd can now perform SELinux checks.
1315 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1317 * getaddrinfo queries are now cached. Canonical name lookup is performed
1319 Implemented by Ulrich Drepper.
1321 * The nothrow function attribute is used when headers are used by gcc when
1322 compiling C code. This can avoid significant amounts of exception
1325 * The malloc functions perform more error checking and are stricter when
1326 it comes to reacting on errors. The default action is to terminate
1327 the process after showing an error message. Implemented by Ulrich Drepper.
1329 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1330 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1332 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1333 namespaces using the new function dlmopen(). This feature is of course,
1334 like most other dynamic loading functionality, not available in statically
1335 linked applications. Implemented by Ulrich Drepper.
1337 * Low-overhead boundary checking variants of string and some stdio functions
1338 were added. These are to be used in conjunction with a gcc patch by
1339 Jakub Jelinek which adds calls to these functions if possible.
1340 Implemented by Jakub Jelinek and Ulrich Drepper.
1342 * Old code for several operating systems and machine architectures that
1343 have not been in working condition in a long time have been removed from
1344 the main source tree maintained by the GNU C Library's maintainers.
1345 These files are now reside in the separate `ports' source module
1346 that is usable as an add-on when building the library.
1350 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1351 interrogate the dynamic linker, compatible with the Solaris interface.
1353 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1354 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1356 * getifaddrs now uses the netlink interface on Linux to get its information.
1357 Implemented by Thorsten Kukuk.
1359 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1360 Implemented by Ulrich Drepper.
1362 * support for non-executable stacks on x86 has been added. Changes mostly
1365 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1368 * getaddrinfo now performs destination address selection according to
1373 * Thread-safe interfaces for many functions that access locale data
1374 were added in version 2.3, but these features were omitted from NEWS.
1375 Many functions have variants with an `_l' suffix that take a `locale_t'
1376 object as a parameter rather than consulting the current locale.
1377 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1378 create and maintain `locale_t' objects. Additionally, the new function
1379 `uselocale' sets "the current locale" (as used by functions not so
1380 parameterized) set for an individual thread. These features were added
1381 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1383 * The functions getresuid, getresgid, setresuid, and setresgid, which
1384 have long been available on Linux, are now declared in <unistd.h>
1385 and are now also available on the Hurd.
1387 * ELF thread-local storage support (TLS) now works on x86-64.
1389 * The new dynamic string token $LIB is expanded in shared library names.
1390 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1392 * Aldy Hernandez contributed complete software floating point support for
1393 PowerPC machines with no FPU.
1395 * fexecve is implemented on Linux.
1397 * The `btowc' function should work at least twice as fast due to
1398 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1400 * With approriate thread add-ons cancelable functions are now implemented
1401 in libc.so as well. No need to call the function in libpthread. This
1402 change allowed to finally disable the incorrect and expensive handling
1403 of weak definition in ld.so.
1405 * Yet more PLT entries in libc.so have been removed. We finally arrived
1406 at the bare minimum. Startup times improved appropriately.
1408 * Support for the new Linux/x86 system call interface was added. The
1409 AT_SYSINFO auxiliary vector entry is recognized and handled.
1413 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1416 * iconv (the program and the interface) now accepts empty names (excluding
1417 options like //TRANSLIT) to mean "use charset of current locale".
1419 * localedef can now transliterate characters in strings which are not in
1420 the provided charmap. The information from the input locale is used.
1422 * Prelinking support was added for ELF targets. This requires additional
1423 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1425 * Read-only stdio streams now use mmap to speed up operation by eliminating
1426 copying and buffer underflows. To use add 'm' to the mode string of
1427 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1429 * The malloc functions were completely rewritten by Wolfram Gloger based
1430 on Doug Lea's malloc-2.7.0.c.
1432 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1433 implementation of regex.
1435 * Bruno Haible upgraded the iconv and locale implementation to support
1438 * Contents of the LC_* and LANG environment variables in the CEN style are
1439 not recognized anymore. It never was used. Change by Ulrich Drepper.
1441 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1442 thread-local storage (TLS) ABI on some platforms.
1443 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1445 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1446 EUC-JISX0213, and TSCII.
1448 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1449 BSD-compatible interface for getting all network interface addresses.
1450 Implementation for IPv4 by Roland McGrath.
1452 * Loading of locale data is faster due to the introduction of a locale
1453 archive. Implemented by Roland McGrath and Ulrich Drepper.
1455 * Startup times are significantly reduced by not using exported functions
1456 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1459 * Steven Munroe contributed a port to PowerPC64/Linux.
1463 * The Hurd now uses the GNU libio implementation of stdio rather than the
1464 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1466 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1467 with the same behavior as the Linux system call of the same name.
1471 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1472 128-bit long double format.
1474 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1475 IBM1161, and IBM1162 charsets.
1477 * Andreas Jaeger contributed a port to x86-64/Linux.
1479 * Peter Bruin contributed a port to PowerPC/Hurd.
1481 * libc functions using I/O streams now can handle wide-oriented streams
1484 * optimizations in the dynamic linker. Binaries created by recent binutils
1485 versions start up quicker due to reduced time spent on relocations.
1487 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1491 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1492 asinh, atanh, j0 for the 128-bit long double format.
1494 * Bruno Haible updated all the code handling Unicode in some form to
1495 support Unicode 3.1.
1497 * Speed of regex for single-byte locales is back to previous levels.
1498 Patch by Isamu Hasegawa.
1500 * Alpha, SPARC, and IA-64 now also using floating stacks.
1502 * Startup time of internationalized applications greatly improved through
1503 iconv cache. Use iconvconfig to generate the cache file.
1504 Contributed by Ulrich Drepper.
1506 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1507 severe performance problems. Patch by David Mosberger.
1509 * The Hurd port got a lot more functionality like AIO, various stdio
1510 extensions, etc. Mainly done by Roland McGrath.
1512 * mtrace can now lookup symbols in shared libraries.
1516 * Intel's IA-64 math library is largely integrated. It provides fast and
1517 accurate implementatations for most basic and standard math functions
1518 in float, double, and long double format.
1520 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1521 and asin for the 96-bit long double format and asin, log, tan for the
1522 128-bit long double format.
1524 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1525 The basic double functions exist today. Contributed by Abraham Ziv
1526 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1527 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1529 * An asynchronous name lookup library was added. The interface is designed
1530 after POSIX AIO. The proposal was circulated beforehand to get comments.
1531 No negative ones came in. Implemented by Ulrich Drepper.
1533 * Port to S390/64bit contributed by Martin Schwidefsky
1534 <schwidefsky@de.ibm.com>.
1536 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1537 of functions for Linux/IA-64.
1539 * The RPC code is now thread safe. Threads can now use the same service
1540 of different services at the same time. Patch by Eric Norum
1541 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1543 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1544 family of functions for Linux/S390.
1546 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1547 of functions for Linux/x86.
1549 * Port to Linux/CRIS contributed by Axis Communications.
1553 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1554 we can now check for namespace violations and missing declarations. The
1555 result is that almost all headers are now Unix-compliant (as defined in
1556 the upcoming XPG6). The negative side is that some programs might need
1557 corrections, too, if they depend on the incorrect form of the headers in
1558 previous versions which defined too many symbols and included too many
1561 * regex now handles multibyte character sets correctly.
1562 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1564 * iconv (the program) does now conform to the upcoming XPG6 and handles
1565 charmaps. Instead of the charset names the path of charmaps can be
1566 provided and the conversion happens based on this data.
1567 Contributed by Ulrich Drepper.
1569 * The locale program now provides detailed information about the installed
1574 only lists the names of the supported locales
1578 provides details such as country, language, and codeset name.
1579 Contributed by Ulrich Drepper.
1583 * The gencat program now parses the input file according to the charset
1584 selected by the LC_CTYPE category. This is important for stateful
1585 character sets. To make generating catalogs easier there is a way
1586 to overwrite the charset selected by the locale: before the first
1587 message or $ quote line the catalog can contain a line like
1589 $ codeset=ISO-8859-2
1591 to select the charset (ISO-8859-2 in this case).
1593 Implemented by Shinya Hanataka and Ulrich Drepper.
1595 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1596 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1597 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1599 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1600 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1602 * The LANGUAGE environment variable is now ignored unless the locale is
1603 changed from the default "C" locale.
1605 * The usual bug fixes.
1609 * Greg McGary added runtime support for bounds checking using gcc's
1610 new -fbounded-pointers option. ix86 target is complete. PowerPC
1613 * Thorsten Kukuk added secure mode support to nscd.
1615 * The Berkeley db libraries have been removed.
1617 Related, the nss_db module is now in a separate package since it
1618 obviously requires a database library being available.
1620 * Wide character I/O streams implemented by Ulrich Drepper.
1622 * Functions from the extended socket API added by Ulrich Drepper.
1624 * Functions feenableexcept and fedisableexcept to control the
1625 behaviour of individual exceptions have been added by Andreas Jaeger.
1627 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1629 * The resolver code has been updated from bind 8.2.3-T5B which supports
1630 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1633 This change could in some situations effect backward compatibility. Since
1634 now `_res' is a thread-local instead of a global variable, modifying it
1635 in one thread does not have any effect in other threads.
1637 The resolver library was also extended to allow IPv6 as the transport
1638 protocol for the requests. This work was done by Stig Venaas.
1640 * Compatibility code for K&R C compilers has been removed from the
1641 header files. A ISO C compiler is needed to use the library
1642 (conforming to either C89 or C99 standard).
1644 * Complete rewrite of the localedef program to support multibyte character
1645 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1646 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1647 Implemented by Ulrich Drepper.
1649 Bruno Haible significantly improved the generation and use of the data
1650 structures for the wide character tables.
1652 * Plural handling in gettext implemented by Ulrich Drepper.
1654 * The utmp daemon has been removed.
1656 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1658 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1661 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1663 * POSIX barriers implemented by Kaz Kylheku.
1665 * POSIX spawn function family implemented by Ulrich Drepper.
1667 * POSIX spinlocks are now available.
1669 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1671 * the configure option --enable-kernel=X.Y.Z allows to strip out
1672 compatibility for kernel versions before X.Y.Z. This is currently only
1673 implemented for Linux.
1675 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1676 field sin6_scope_id. This means that all programs using IPv6 should be
1677 recompiled. Don't expect binary compatibility with previous glibc
1680 * various conversion modules for IBM character sets contributed by
1683 * IA-64 port by Jes Sorensen and HJ Lu.
1697 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1699 * New xdr functions are added; some rpc functions are now 64bit clean.
1701 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1703 * Fixed known incompatibilities with glibc 2.0.
1705 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1707 * Optimized a number of functions (especially the ELF dynamic loader).
1709 * Update timezone data files.
1711 * lots of charmaps corrections
1713 * some new locale definitions and charmaps
1718 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1719 conform to POSIX member type requirements. Symbol versions have been
1720 adjusted as needed within the library, and for direct use by applications,
1721 but there is potential for problems if third-party libraries use
1722 struct timeval as part of their interface. This does not present
1723 a problem for X and other "essential" system libraries.
1725 * An additional locale model to support C++ Standard Library locale
1726 model and probably more was implemented by Ulrich Drepper.
1728 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1731 * Miles Bader provided the `argp' function family to support hierachical
1732 command line argument parsing, layered on top of getopt.
1734 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1736 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1739 * scanf recognizes the %a and %A format for scanning floating point numbers.
1741 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1742 information and interfaces for the available integer types.
1744 * about 130 new math functions were added to implement the ISO C9x math
1747 * the new header <complex.h> contains definitions of the complex math
1748 functions from ISO C 9X.
1750 * the new header <tgmath.h> defines generic macros to use complex or
1751 real valued functions.
1753 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1755 * Andreas Jaeger provided a test suite for the math library.
1757 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1759 * Ulrich Drepper added character set conversion functions (iconv).
1761 * Optimized string functions have been added.
1763 * The localedata addon is now part of glibc.
1765 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1767 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1768 daemon for NSS (nscd).
1770 Missing a better place here are some numbers on improvements. Under
1771 Linux 2.1.125 un-tar-ing the kernel sources takes
1775 using local files 12.19s 6.88s 22.91s
1777 using NIS 13.92s 8.91s 26.34s
1779 using NIS & nscd 10.37s 7.34s 25.30s
1781 using NIS+ 27.57s 30.37s 640.46s
1783 using NIS+ & nscd 10.25s 7.83s 26.51s
1785 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1787 Keep in mind that non-namelookup related operations dominate above times.
1788 It was just a common complain that using NIS+ unpacking the kernel is
1791 [1] The old nscd implementation is not available anymore since it was
1792 distributed with glibc up to version 2.0.98 and thus is now replaced.
1794 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1796 * Mark Kettenis provided a Hesiod NSS module.
1798 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1799 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1801 * rcmd can now handle netgroups (Dick Streefland).
1803 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1806 * Support for the IPv6 protocol has been added to the socket API, as per the
1807 latest draft standards.
1809 * Support for Linux 2.2 has been added.
1811 * Interface changes relative to the latest 2.0.x release:
1812 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1813 addseverity NEW: Unix98
1814 alphasort64 NEW: LFS
1815 argp_err_exit_status NEW: argp, GNU ext
1816 argp_error NEW: argp, GNU ext
1817 argp_failure NEW: argp, GNU ext
1818 argp_help NEW: argp, GNU ext
1819 argp_parse NEW: argp, GNU ext
1820 argp_program_bug_address NEW: argp, GNU ext
1821 argp_program_version NEW: argp, GNU ext
1822 argp_program_version_hook NEW: argp, GNU ext
1823 argp_state_help NEW: argp, GNU ext
1824 argp_usage NEW: argp, GNU ext
1825 authdes_create NEW: Secure RPC
1826 authdes_getucred NEW: Secure RPC
1827 authdes_pk_create NEW: Secure RPC
1828 backtrace NEW: GNU ext.
1829 backtrace_symbols NEW: GNU ext.
1830 backtrace_symbols_fd NEW: GNU ext.
1832 cacosf NEW: ISO C 9x
1833 cacosh NEW: ISO C 9x
1834 cacoshf NEW: ISO C 9x
1835 cacoshl NEW: ISO C 9x
1836 cacosl NEW: ISO C 9x
1843 casinf NEW: ISO C 9x
1844 casinh NEW: ISO C 9x
1845 casinhf NEW: ISO C 9x
1846 casinhl NEW: ISO C 9x
1847 casinl NEW: ISO C 9x
1849 catanf NEW: ISO C 9x
1850 catanh NEW: ISO C 9x
1851 catanhf NEW: ISO C 9x
1852 catanhl NEW: ISO C 9x
1853 catanl NEW: ISO C 9x
1854 cbc_crypt NEW: Secure RPC
1858 ccoshf NEW: ISO C 9x
1859 ccoshl NEW: ISO C 9x
1865 cimagf NEW: ISO C 9x
1866 cimagl NEW: ISO C 9x
1867 clearerr_locked REMOVED
1868 clntunix_create NEW: sunrpc ext
1870 clog10 NEW: ISO C 9x
1871 clog10f NEW: ISO C 9x
1872 clog10l NEW: ISO C 9x
1882 cprojf NEW: ISO C 9x
1883 cprojl NEW: ISO C 9x
1885 crealf NEW: ISO C 9x
1886 creall NEW: ISO C 9x
1891 csinhf NEW: ISO C 9x
1892 csinhl NEW: ISO C 9x
1895 csqrtf NEW: ISO C 9x
1896 csqrtl NEW: ISO C 9x
1900 ctanhf NEW: ISO C 9x
1901 ctanhl NEW: ISO C 9x
1903 des_setparity NEW: Secure RPC
1904 ecb_crypt NEW: Secure RPC
1905 endutxent NEW: Unix98
1907 exp10f NEW: ISO C 9x
1908 exp10l NEW: ISO C 9x
1912 fattach NEW: STREAMS
1913 fdetach NEW: STREAMS
1917 feclearexcept NEW: ISO C 9x
1918 fegetenv NEW: ISO C 9x
1919 fegetexceptflag NEW: ISO C 9x
1920 fegetround NEW: ISO C 9x
1921 feholdexcept NEW: ISO C 9x
1923 feraiseexcept NEW: ISO C 9x
1924 ferror_locked REMOVED
1925 fesetenv NEW: ISO C 9x
1926 fesetexceptflag NEW: ISO C 9x
1927 fesetround NEW: ISO C 9x
1928 fetestexcept NEW: ISO C 9x
1929 feupdateenv NEW: ISO C 9x
1930 fflush_locked REMOVED
1934 fgets_unlocked NEW: GNU ext.
1935 fileno_locked REMOVED
1947 fputc_locked REMOVED
1948 fputs_unlocked NEW: GNU ext.
1949 fread_unlocked NEW: GNU ext.
1954 fstatvfs NEW: Unix98
1958 ftruncate64 NEW: LFS
1960 fwrite_unlocked NEW: GNU ext.
1961 gai_strerror NEW: IPv6
1965 getchar_locked REMOVED
1967 getdate_err NEW: Unix98
1968 getdate_r NEW: GNU ext.
1970 getnameinfo NEW: IPv6
1971 getnetname NEW: Secure RPC
1972 getpmsg NEW: STREAMS
1973 getpt NEW: Unix98 PTY
1974 getrlimit64 NEW: LFS
1975 getutxent NEW: Unix98
1976 getutxid NEW: Unix98
1977 getutxline NEW: Unix98
1978 glob64 NEW: GNU ext.
1979 globfree64 NEW: GNU ext.
1980 gnu_get_libc_release NEW: GNU ext.
1981 gnu_get_libc_version NEW: GNU ext.
1982 grantpt NEW: Unix98 PTY
1983 host2netname NEW: Secure RPC
1985 iconv_close NEW: iconv
1986 iconv_open NEW: iconv
1987 if_freenameindex NEW: IPv6
1988 if_indextoname NEW: IPv6
1989 if_nameindex NEW: IPv6
1990 if_nametoindex NEW: IPv6
1991 in6addr_any NEW: IPv6
1992 in6addr_loopback NEW: IPv6
1993 inet6_isipv4mapped NEW: IPv6
1994 isastream NEW: STREAMS
1995 iswblank NEW: GNU ext.
1996 key_decryptsession NEW: Secure RPC
1997 key_decryptsession_pk NEW: Secure RPC
1998 key_encryptsession NEW: Secure RPC
1999 key_encryptsession_pk NEW: Secure RPC
2000 key_gendes NEW: Secure RPC
2001 key_get_conv NEW: Secure RPC
2002 key_secretkey_is_set NEW: Secure RPC
2003 key_setnet NEW: Secure RPC
2004 key_setsecret NEW: Secure RPC
2005 llrint NEW: ISO C 9x
2006 llrintf NEW: ISO C 9x
2007 llrintl NEW: ISO C 9x
2008 llround NEW: ISO C 9x
2009 llroundf NEW: ISO C 9x
2010 llroundl NEW: ISO C 9x
2015 lrintf NEW: ISO C 9x
2016 lrintl NEW: ISO C 9x
2017 lround NEW: ISO C 9x
2018 lroundf NEW: ISO C 9x
2019 lroundl NEW: ISO C 9x
2021 makecontext NEW: Unix98
2022 mempcpy NEW: GNU ext.
2025 modify_ldt NEW: kernel
2029 nearbyint NEW: ISO C 9x
2030 nearbyintf NEW: ISO C 9x
2031 nearbyintl NEW: ISO C 9x
2032 netname2host NEW: Secure RPC
2033 netname2user NEW: Secure RPC
2034 nexttoward NEW: ISO C 9x
2035 nexttowardf NEW: ISO C 9x
2036 nexttowardl NEW: ISO C 9x
2040 passwd2des NEW: Secure RPC
2042 pow10f NEW: GNU ext.
2043 pow10l NEW: GNU ext.
2046 printf_size NEW: GNU ext.
2047 printf_size_info NEW: GNU ext.
2048 profil_counter REMOVED
2049 pthread_mutexattr_getkind_np REPLACED
2050 pthread_mutexattr_setkind_np REPLACED
2051 ptsname NEW: Unix98 PTY
2052 ptsname_r NEW: Unix98 PTY
2054 putchar_locked REMOVED
2055 putgrent NEW: GNU ext.
2057 putpmsg NEW: STREAMS
2058 pututxline NEW: Unix98
2062 readdir64_r NEW: LFS
2063 remquo NEW: ISO C 9x
2064 remquof NEW: ISO C 9x
2065 remquol NEW: ISO C 9x
2067 roundf NEW: ISO C 9x
2068 roundl NEW: ISO C 9x
2070 scalbln NEW: ISO C 9x
2071 scalblnf NEW: ISO C 9x
2072 scalblnl NEW: ISO C 9x
2074 sendfile NEW: kernel
2075 setcontext NEW: Unix98
2076 setrlimit64 NEW: LFS
2077 setutxent NEW: Unix98
2079 sigignore NEW: Unix98
2080 sigqueue NEW: POSIX.1b
2081 sigrelse NEW: Unix98
2082 sigset NEW: POSIX.1b
2083 sigtimedwait NEW: POSIX.1b
2084 sigwaitinfo NEW: POSIX.1b
2085 sincos NEW: GNU ext.
2086 sincosf NEW: GNU ext.
2087 sincosl NEW: GNU ext.
2091 strcasestr NEW: GNU ext.
2092 strtoimax NEW: ISO C 9x
2093 strtoumax NEW: ISO C 9x
2094 strverscmp NEW: GNU ext.
2095 svcauthdes_stats NEW: Secure RPC
2096 svcunix_create NEW: sunrpc etx
2097 svcunixfd_create NEW: sunrpc ext
2098 swapcontext NEW: Unix98
2099 tcgetsid NEW: Unix98 PTY
2100 tdestroy NEW: GNU ext.
2101 tgamma NEW: ISO C 9x
2102 tgammaf NEW: ISO C 9x
2103 tgammal NEW: ISO C 9x
2107 truncf NEW: ISO C 9x
2108 truncl NEW: ISO C 9x
2110 unlockpt NEW: Unix98 PTY
2111 updwtmpx NEW: Unix98
2112 user2netname NEW: Secure RPC
2113 utmpxname NEW: Unix98
2114 versionsort NEW: GNU ext.
2115 versionsort64 NEW: GNU ext.
2117 wcscasecmp NEW: GNU ext.
2118 wcsncasecmp NEW: GNU ext.
2119 wcsnlen NEW: GNU ext.
2120 wcstoimax NEW: ISO C 9x
2121 wcstoll NEW: ISO C 9x
2122 wcstoull NEW: ISO C 9x
2123 wcstoumax NEW: ISO C 9x
2125 wordexp NEW: POSIX.2
2126 wordfree NEW: POSIX.2
2127 write_profiling REMOVED
2128 xdecrypt NEW: Secure RPC
2129 xdr_authdes_cred NEW: Secure RPC
2130 xdr_authdes_verf NEW: Secure RPC
2131 xdr_cryptkeyarg NEW: Secure RPC
2132 xdr_cryptkeyarg2 NEW: Secure RPC
2133 xdr_cryptkeyres NEW: Secure RPC
2134 xdr_getcredres NEW: Secure RPC
2135 xdr_key_netstarg NEW: Secure RPC
2136 xdr_key_netstres NEW: Secure RPC
2137 xdr_keybuf NEW: Secure RPC
2138 xdr_keystatus NEW: Secure RPC
2139 xdr_netnamestr NEW: Secure RPC
2140 xdr_sizeof NEW: Secure RPC
2141 xdr_unixcred NEW: sunrpc ext
2142 xencrypt NEW: Secure RPC
2143 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2154 * inet_ntoa is thread-safe
2156 * updwtmp is moved from libutil to libc
2158 * rewrite of cbrt function
2160 * update of timezone data
2174 * add atoll function
2176 * fix complex problems in Berkeley DB code
2178 * fix math functions
2182 * fixed lots of header problems (especially Linux/GNU specific)
2184 * dynamic loader preserves all registers
2186 * Roland McGrath provided support for handling of auxiliary objects in
2187 the ELF dynamic loader.
2189 * support for parallel builds is improved
2193 * GNU extensions are no longer declared by default. To enable them you
2194 must define the macro `_GNU_SOURCE' in your program or compile with
2197 * The library has changed from using GNU ld symbol aliases to using weak
2198 symbols where available. The ELF object file format supports weak
2199 symbols; GNU ld also supports weak symbols in the a.out format. (There
2200 is also now support for other GNU ld extensions in ELF. Use the
2201 `--with-elf' option to configure to indicate you have ELF, and
2202 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2203 of many files which contained only symbol aliases, reducing the size of
2204 the source and the compiled library; many other files were renamed to
2205 less cryptic names previously occupied by the symbol alias files.
2206 There is a new header file <elf.h> for programs which operate on
2207 files in the ELF format.
2209 * Converted to Autoconf version 2, so `configure' has more options.
2210 Run `configure --help' to see the details.
2212 * The library can now be configured to build profiling, highly-optimized
2213 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2214 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2215 `configure' enable building these extra libraries. The shared library is
2216 built by default when using both ELF and GNU ld. When shared libraries
2217 are enabled, the new library `-ldl' is available for arbitrary run-time
2218 loading of shared objects; its interface is defined in <dlfcn.h>. The
2219 new header file <link.h> gives access to the internals of the run-time
2220 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2221 application of same name on other systems and it provides information
2222 about dynamically linked binaries.
2224 * The C library now provides the run-time support code for profiling
2225 executables compiled with `-pg'. Programs can control the profiling code
2226 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2227 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2228 the support for this file format was contributed by David Mosberger-Tang.
2230 * The math code has been replaced with a math library based on fdlibm from
2231 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2232 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2233 functions. The math functions now reside in a separate library, so
2234 programs using them will need to use `-lm' their linking commands.
2236 * John C. Bowman contributed optimized ix87 assembler inline functions.
2238 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2239 mechanism similar to that found in Solaris 2. This is now used for the
2240 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2241 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2242 file controls what services are used for each individual database. This
2243 works by loading shared libraries with names specified in `nsswitch.conf',
2244 so service modules can be changed or added at any time without even
2245 relinking any program. Currently there are the file, db, and NIS based
2246 NSS services available.
2248 * The new functions `strtoq' and `strtouq' parse integer values from
2249 strings, like `strtol' and `strtoul', but they return `long long int' and
2250 `unsigned long long int' values, respectively (64-bit quantities).
2252 * The new functions `strtof' and `strtold' parse floating-point values from
2253 strings, like `strtod', but they return `float' and `long double' values,
2254 respectively (on some machines `double' and `long double' are the same).
2256 * Ulrich Drepper has contributed new implementations of the floating-point
2257 printing and reading code used in the `printf' family of functions and
2258 `strtod', `strtof', and `strtold'. These new functions are perfectly
2259 accurate, and much faster than the old ones.
2261 * The implementation of the POSIX locale model was completely rewritten by
2262 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2263 to compile the POSIX locale definition.
2265 * The former dummy implementations of the strcoll and strxfrm function are
2266 now replaced by fully functional code contributed by Ulrich Drepper. The
2267 collation information comes from the POSIX locale definitions.
2269 * The new header <langinfo.h> defines an interface for accessing
2270 various locale-dependent data (using the locale chosen with `setlocale').
2272 * Ulrich Drepper has contributed a new suite of functions for operation on
2273 wide-character and multibyte-character strings, in <wchar.h>;
2274 and classification and case conversion of wide characters, in <wctype.h>.
2275 These new functions are conforming to the ISO C, Amendement 1 specification.
2277 * There is now a second implementation of the standard I/O library available.
2278 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2279 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2281 * You can now use positional parameter specifications in format strings
2282 for the `printf' and `scanf' families of functions. For example,
2283 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2284 ``Number 6, Mr Jones''. This is mainly useful when providing different
2285 format strings for different languages, whose grammars may dictate
2286 different orderings of the values being printed. To support this
2287 feature, the interface for `register_printf_handler' has changed; see
2288 the header file <printf.h> for details.
2290 * The `printf' and `scanf' families of functions now understand a new
2291 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2292 to group numbers as indicated by the locale; for `scanf' and friends, this
2293 says to accept as valid only a number with all the proper grouping
2294 separators in the right places. In the default "C" locale, numbers are
2295 not grouped; but locales for specific countries will define the usual
2296 conventions (i.e. separate thousands with `,' in the US locale).
2298 * The pgrp functions have been regularized, slightly incompatibly but much
2299 less confusingly. The core functions are now `getpgid' and `setpgid',
2300 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2301 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2302 provided for compatibility. There is no longer an incompatible `getpgrp'
2303 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2305 * The new header file <fts.h> and suite of functions simplify programs that
2306 operate on directory trees. This code comes from 4.4 BSD.
2308 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2309 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2310 NSS scheme used in glibc.
2312 * There is a new malloc debugging hook `__memalign_hook'.
2314 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2315 `unsigned int' in <sys/types.h>. These are for compatibility only and
2316 their use is discouraged.
2318 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2319 done differently, so that it works even without GNU ld.
2321 * New function `euidaccess' checks allowed access to a file like `access',
2322 but using the effective IDs instead of the real IDs.
2324 * The time zone data files have been updated for the latest and greatest
2325 local time conventions of the countries of the world.
2327 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2330 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2331 for formatting floating-point numbers. They are provided only for
2332 compatibility; new programs should use `sprintf' instead. There are
2333 also equivalent function for the `long double' floating-point type and
2334 all functions also exist in a reentrant form.
2336 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2337 functions for maintaining the login-record files (primarily of use to
2338 system programs such as `login'), and convenient functions for
2339 allocating and initializing a pseudo-terminal (pty) device.
2341 * Ulrich Drepper has contributed new support for System V style
2342 shared memory and IPC on systems that support it.
2344 * Ulrich Drepper has contributed several miscellaneous new functions found
2345 in System V: The `hsearch' family of functions provide an effective
2346 implementation of hash tables; `a64l' and `l64a' provide a very simple
2347 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2350 * Ulrich Drepper has contributed new reentrant counterparts for the
2351 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2353 * Ulrich Drepper has contributed new, highly-optimized versions of several
2354 string functions for the i486/Pentium family of processors.
2356 * Ulrich Drepper has updated the Linux-specific code, based largely
2357 on work done in Hongjiu Lu's version of GNU libc for Linux.
2358 The GNU library now supports Linux versions 2.0.10 and later,
2359 using the ELF object file format (i[3456]86-*-linux).
2361 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2363 * David Mosberger-Tang and Richard Henderson have ported the C library
2364 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2365 dynamic linking support for ELF/Alpha.
2367 * Richard Henderson contributed several Alpha optimized assembler function
2368 for arithmetic and string handling.
2370 * Ulrich Drepper has contributed a new set of message catalog functions to
2371 support multiple languages using the <libintl.h> interface, for use with
2372 his new package GNU gettext. Translation volunteers have contributed
2373 catalogs of the library's messages in Spanish, German, and Korean.
2375 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2376 program and the `catgets' function for reading the catalog files it
2377 creates. (The <libintl.h> interface is preferred; we include the
2378 <nl_types.h> interface using `catgets' only for source compatibility with
2379 programs already written to use it.)
2381 * New header file <values.h> gives SVID-compatible names for <limits.h>
2384 * Various new macros, declarations, and small header files for compatibility
2387 * New function `group_member' is a convenient way to check if a process has
2388 a given effective group ID.
2390 * When using GCC 2.7 and later, the socket functions are now declared in a
2391 special way so that passing an argument of type `struct sockaddr_in *',
2392 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2393 `struct sockaddr *' type, does not generate a type-clash warning.
2395 * New function `error' declared in header file <error.h> is a convenient
2396 function for printing error messages and optionally exiting; this is the
2397 canonical function used in GNU programs. The new functions `err', `warn',
2398 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2399 doing the same thing.
2401 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2402 POSIX.2 `glob' function to do ~ and {...} expansion.
2404 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2405 `clearenv' which is used in POSIX.9 is also available.
2407 * New function `getsid' returns session ID number on systems that support it.
2409 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2410 files <db.h> and <mpool.h> provide a rich set of functions for several
2411 types of simple databases stored in memory and in files, and <ndbm.h> is
2412 an old `ndbm'-compatible interface using the `db' functions. Link with
2413 `-ldb' to get these functions.
2415 * New macro `strdupa' copies a string like `strdup', but uses local stack
2416 space from `alloca' instead of dynamic heap space from `malloc'.
2418 * New function `strnlen' is like `strlen' but searches only a given maximum
2419 number of characters for the null terminator. `stpncpy', `strndup' and
2420 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2423 * New function `statfs' in header <sys/statfs.h>.
2425 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2426 provide convenient functions for operating on blocks of null-terminated
2429 * A new suite of functions in <utmp.h> handle all the details of reading
2430 and writing the utmp file.
2432 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2435 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2436 completely POSIX compliant and also implemented the extended functionality
2437 to handle alternate digit representation and alternate era date formats.
2439 * Ulrich Drepper provided an implementation of the `strptime' function
2440 defined in XPG4.2 which transforms a string into a `struct tm' value.
2442 * Paul Eggert provided the tzselect shell script as part of the timezone
2443 code. The shell script makes it easy to select the correct timezone
2446 * The implementation of the malloc family of functions is completely replaced
2447 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2448 The implementation uses the mmap function (if available) and it is
2449 optimized for the use in multi threaded programs.
2451 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2452 functions. This new functionality is usable by specifying a special
2453 salt string and it is compatible with implementation on *BSD systems.
2455 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2456 `getsubopt' to handle second level command line options, `bsd_signal'
2457 to access BSD style `signal' functionality, the obsolete `regexp' style
2460 * the `lchown' function is available on system which support this
2463 * The implementation of the shadow password handling function was contributed
2466 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2468 * POSIX.1g support was added. The <sys/select.h> header is available,
2469 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2470 implementation of `getaddrinfo'.
2474 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2476 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2477 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2479 * The new function `daemon' from 4.4 BSD is useful for server programs that
2480 want to put themselves in the background.
2482 * Joel Sherrill has contributed support for several standalone boards that
2483 run without an operating system.
2485 * `printf', `scanf' and friends now accept a `q' type modifier for long
2486 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2488 * All of the code taken from BSD (notably most of the math and networking
2489 routines) has been updated from the BSD 4.4-Lite release.
2491 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2493 * The new functions `getdomainname' and `setdomainname' fetch or change the
2494 YP/NIS domain name. These are system calls which exist on systems which
2497 * The time zone data files have been updated for the latest international
2500 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2501 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2505 * The C library now includes support for Sun RPC, from Sun's free
2506 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2507 are included. (There is still no support for YP.)
2509 * Tom Quinn has contributed a port of the C library to SGI machines running
2510 Irix 4 (mips-sgi-irix4).
2512 * The new `lockf' function is a simplified interface to the locking
2513 facilities of `fcntl', included for compatibility.
2515 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2517 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2519 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2522 * The error message printed by `assert' for a failed assertion now includes
2523 the name of the program (if using GNU ld) and the name of the calling
2524 function (with versions of GCC that support this).
2526 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2528 * The library now includes the <sys/mman.h> header file and memory
2529 management functions `mmap', `munmap', `mprotect', `msync', and
2530 `madvise', on systems that support those facilities.
2532 * The interface for `mcheck' has changed slightly: the function called to
2533 abort the program when an allocation inconsistency is detected now takes
2534 an argument that indicates the type of failure. The new function
2535 `mprobe' lets you request a consistency check for a particular block at
2536 any time (checks are normally done only when you call `free' or `realloc'
2539 * It is now possible to easily cross-compile the C library, building on one
2540 system a library to run on another machine and/or operating system. All
2541 you need to do is set the variable `HOST_CC' in `configparms' to the
2542 native compiler for programs to run on the machine you are building on (a
2543 few generator programs are used on Unix systems); set `CC' to the
2546 * The new function `fexecve' (only implemented on the GNU system) executes
2547 a program file given a file descriptor already open on the file.
2551 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2552 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2554 * You can set the variable `libprefix' in `configparms' to specify a prefix
2555 to be prepended to installed library files; this makes it easy to install
2556 the GNU C library to be linked as `-lgnuc' or whatever.
2558 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2559 copies a limited number of characters from a string, and returns the
2560 address of the last character written.
2562 * You no longer need to check for whether the installed `stddef.h' is
2563 compatible with the GNU C library. configure now checks for you.
2565 * You can now define a per-stream `fileno' function to convert the
2566 stream's cookie into an integral file descriptor.
2568 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2569 allocates zero bytes of storage, and returns a unique pointer which
2570 you can pass to `realloc' or `free'. The behavior is undefined if
2571 you dereference this pointer.
2573 * The C library now runs on Sony NEWS m68k machines running either
2574 NewsOS 3 or NewsOS 4.
2576 * The new `syscall' function is a system-dependent primitive function
2577 for invoking system calls. It has the canonical behavior on Unix
2578 systems, including unreliable return values for some calls (such as
2579 `pipe', `fork' and `getppid').
2581 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2582 to `EAGAIN', which is the preferred name. On systems whose kernels
2583 use two distinct codes, the C library now translates EWOULDBLOCK to
2584 EAGAIN in every system call function.
2588 * The GNU C Library Reference Manual is now distributed with the library.
2589 `make dvi' will produce a DVI file of the printed manual.
2590 `make info' will produce Info files that you can read on line using C-h i
2591 in Emacs or the `info' program.
2592 Please send comments on the manual to bug-glibc-manual@gnu.org.
2594 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2596 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2598 * Jason Merrill has contributed a port to the Sequent Symmetry running
2599 Dynix version 3 (i386-sequent-dynix).
2601 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2602 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2604 * New function `memory_warnings' lets you arrange to get warnings when
2605 malloc is running out of memory to allocate, like Emacs gives you.
2607 * The C library now contains the relocating allocator used in Emacs 19 for
2608 its editing buffers. This allocator (ralloc) minimizes allocation
2609 overhead and fragmentation by moving allocated regions around whenever it
2610 needs to. You always refer to a ralloc'd region with a "handle" (a
2611 pointer to a pointer--an object of type `void **').
2613 * There is a new `printf' format: `%m' gives you the string corresponding
2614 to the error code in `errno'.
2616 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2617 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2618 pass, the `a' modifier says to fill in a `char **' you pass with a
2621 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2622 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2623 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2625 * `mkstemp' is a traditional Unix function to atomically create and open a
2626 uniquely-named temporary file.
2630 * The standard location for the file that says what the local timezone is
2631 has changed again. It is now `/usr/local/etc/localtime' (or more
2632 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2634 * The distribution no longer contains any files with names longer than 14
2637 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2638 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2640 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2644 * The configuration process has changed quite a bit. The `configure'
2645 script is now used just like the configuration scripts for other GNU
2646 packages. The `sysdeps' directory hierarchy is much rearranged.
2647 The file `INSTALL' explains the new scheme in detail.
2649 * The header files no longer need to be processed into ANSI C and
2650 traditional C versions. There is just one set of files to install, and
2651 it will work with ANSI or old C compilers (including `gcc -traditional').
2653 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2654 MIPS DECStation running Ultrix 4.
2656 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2657 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2658 made itself into a shared library.
2660 * Yet further improved support for the i386, running 4.3 BSD-like systems
2661 (such as Mach 3 with the Unix single-server), or System V.
2663 * New function `strncasecmp' to do case-insensitive string comparison
2664 with limited length.
2666 * New function `strsep' is a reentrant alternative to `strtok'.
2668 * New functions `scandir' and `alphasort' for searching directories.
2670 * New function `setenv' is a better interface to `putenv'.
2672 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2673 function for traversing a directory tree.
2675 * The GNU obstack package is now also part of the C library.
2676 The new function `open_obstack_stream' creates a stdio stream that
2677 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2678 formatted output directly to an obstack.
2680 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2681 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2683 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2685 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2686 things to your strings.
2688 * There are some new test programs: test-fseek, testmb, and testrand.
2690 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2691 These ports are not finished, but are a good starting place for really
2692 supporting those systems.
2694 * `/etc/localtime' is now the standard location for the file that says what
2695 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2696 This follows the general principle that `/etc' is the place for all local
2697 configuration files.
2699 * The C library header files now use `extern "C"' when used by the C++
2700 compiler, so the C library should now work with C++ code.
2702 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2703 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2706 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2707 function which uses the `merge sort' algorithm, and is said to be
2708 significantly faster than the old GNU `qsort' function. Merge sort is
2709 now the standard `qsort' function. The new algorithm can require a lot
2710 of temporary storage; so, the old sorting function is called when the
2711 required storage is not available.
2713 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2714 provides the Unix `crypt' function, plus some other entry points.
2716 * The code and header files taken from 4.4 BSD have been updated with the
2717 latest files released from Berkeley.
2719 ----------------------------------------------------------------------
2720 Copyright information:
2722 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2724 Permission is granted to anyone to make or distribute verbatim copies
2725 of this document as received, in any medium, provided that the
2726 copyright notice and this permission notice are preserved,
2727 thus giving the recipient permission to redistribute in turn.
2729 Permission is granted to distribute modified versions
2730 of this document, or of portions of it,
2731 under the above conditions, provided also that they
2732 carry prominent notices stating who last changed them.
2735 version-control: never