NEWS

   1 GNU C Library NEWS -- history of user-visible changes.
   2 Copyright (C) 1992-2014 Free Software Foundation, Inc.
   3 See the end for copying conditions.
   4
   5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
   6 using `glibc' in the "product" field.
   7 \f
   8 Version 2.21
   9
  10 * The following bugs are resolved with this release:
  11
  12   6652, 17266, 17363, 17370, 17371.
  13 \f
  14 Version 2.20
  15
  16 * The following bugs are resolved with this release:
  17
  18   6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
  19   15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
  20   16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
  21   16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
  22   16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
  23   16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
  24   16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
  25   16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
  26   16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
  27   16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
  28   16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
  29   16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
  30   17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
  31   17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
  32   17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17344, 17354.
  33
  34 * Reverted change of ABI data structures for s390 and s390x:
  35   On s390 and s390x the size of struct ucontext and jmp_buf was increased in
  36   2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
  37   of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
  38   are preserved pointing straight to the same implementation as the old ones.
  39   Given that, new callers will simply provide a too-big buffer to these
  40   functions. Any applications/libraries out there that embed jmp_buf or
  41   ucontext_t in an ABI-relevant data structure that have already been rebuilt
  42   against 2.19 headers will have to rebuilt again. This is necessary in any
  43   case to revert the breakage in their ABI caused by the glibc change.
  44
  45 * Support for file description locks is added to systems running the
  46   Linux kernel. The standard file locking interfaces are extended to
  47   operate on file descriptions, not file descriptors, via the use of
  48   F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
  49   are associated with an open file instead of a process.
  50
  51 * Optimized strchr implementation for AArch64.  Contributed by ARM Ltd.
  52
  53 * The minimum Linux kernel version that this version of the GNU C Library
  54   can be used with is 2.6.32.
  55
  56 * Running the testsuite no longer terminates as soon as a test fails.
  57   Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
  58   with PASS or FAIL lines for individual tests.  A summary of the results is
  59   printed, including a list of failing lists, and "make check" exits with
  60   error status if there were any unexpected failures.  "make check
  61   stop-on-test-failure=y" may be used to keep the old behavior.
  62
  63 * The am33 port, which had not worked for several years, has been removed
  64   from ports.
  65
  66 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
  67   supported; they now act the same as _DEFAULT_SOURCE (but generate a
  68   warning).  Except for cases where _BSD_SOURCE enabled BSD interfaces that
  69   conflicted with POSIX (support for which was removed in 2.19), the
  70   interfaces those macros enabled remain available when compiling with
  71   _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
  72   test macros defined.
  73
  74 * Optimized strcmp implementation for ARMv7.  Contributed by ARM Ltd.
  75
  76 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
  77   This may improve lock scaling of existing programs on TX capable systems.
  78   The lock elision code is only built with --enable-lock-elision=yes and
  79   then requires a GCC version supporting the TX builtins.  With lock elision
  80   default mutexes are elided via __builtin_tbegin, if the cpu supports
  81   transactions. By default lock elision is not enabled and the elision code
  82   is not built.
  83
  84 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
  85   copy the path argument.  This allowed programs to cause posix_spawn to
  86   deference a dangling pointer, or use an unexpected pathname argument if
  87   the string was modified after the posix_spawn_file_actions_addopen
  88   invocation.
  89
  90 * All supported architectures now use the main glibc sysdeps directory
  91   instead of some being in a separate "ports" directory (which was
  92   distributed separately before glibc 2.17).
  93
  94 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
  95   On configurations that support it (all Linux configurations), it's now
  96   used regardless of the --enable-add-ons switch to configure.  It is no
  97   longer possible to build such configurations without pthreads support.
  98
  99 * Locale names, including those obtained from environment variables (LANG
 100   and the LC_* variables), are more tightly checked for proper syntax.
 101   setlocale will now fail (with EINVAL) for locale names that are overly
 102   long, contain slashes without starting with a slash, or contain ".." path
 103   components. (CVE-2014-0475)  Previously, some valid locale names were
 104   silently replaced with the "C" locale when running in AT_SECURE mode
 105   (e.g., in a SUID program).  This is no longer necessary because of the
 106   additional checks.
 107
 108 * On x86-64, the dynamic linker's lazy-binding support is now compatible
 109   with application code using Intel MPX instructions.  (With all previous
 110   versions, the MPX register state could be clobbered when making calls
 111   into or out of a shared library.)  Note that while the new dynamic
 112   linker is compatible with all known x86 hardware whether or not it
 113   supports Intel MPX, some x86 instruction-set emulators might fail to
 114   handle the new instruction encodings.  This is known to affect Valgrind
 115   versions up through 3.9 (but will be fixed in the forthcoming 3.10
 116   release), and might affect other tools that do instruction emulation.
 117
 118 * Support for loadable gconv transliteration modules has been removed.
 119   The support for transliteration modules has been non-functional for
 120   over a decade, and the removal is prompted by security defects.  The
 121   normal gconv conversion modules are still supported.  Transliteration
 122   with //TRANSLIT is still possible, and the //IGNORE specifier
 123   continues to be  supported. (CVE-2014-5119)
 124
 125 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
 126   IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
 127   resulting a denial-of-service security vulnerability in applications which
 128   use functions related to iconv. (CVE-2014-6040)
 129 \f
 130 Version 2.19
 131
 132 * The following bugs are resolved with this release:
 133
 134   156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
 135   7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
 136   12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
 137   14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
 138   15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
 139   15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
 140   15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
 141   15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
 142   15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
 143   15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
 144   15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
 145   15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
 146   16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
 147   16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
 148   16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
 149   16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
 150   16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
 151   16431, 16453, 16474, 16506, 16510, 16529
 152
 153 * Slovenian translations for glibc messages have been contributed by the
 154   Translation Project's Slovenian team of translators.
 155
 156 * The public headers no longer use __unused nor __block.  This change is to
 157   support compiling programs that are derived from BSD sources and use
 158   __unused internally, and to support compiling with Clang's -fblock
 159   extension which uses __block.
 160
 161 * CVE-2012-4412 The strcoll implementation caches indices and rules for
 162   large collation sequences to optimize multiple passes.  This cache
 163   computation may overflow for large collation sequences and may cause a
 164   stack or buffer overflow.  This is now fixed to use a slower algorithm
 165   which does not use a cache if there is an integer overflow.
 166
 167 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
 168   rules for large collation sequences to optimize multiple passes and falls
 169   back to alloca if malloc fails, resulting in a possible stack overflow.
 170   The implementation now falls back to an uncached collation sequence lookup
 171   if malloc fails.
 172
 173 * CVE-2013-4788 The pointer guard used for pointer mangling was not
 174   initialized for static applications resulting in the security feature
 175   being disabled. The pointer guard is now correctly initialized to a
 176   random value for static applications. Existing static applications need
 177   to be recompiled to take advantage of the fix (bug 15754).
 178
 179 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
 180   to the d_name member of struct dirent, or omit the terminating NUL
 181   character.  (Bugzilla #14699).
 182
 183 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
 184   aligned_alloc functions could allocate too few bytes or corrupt the
 185   heap when passed very large allocation size values (Bugzilla #15855,
 186   #15856, #15857).
 187
 188 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
 189   for AF_INET6 has been fixed (Bugzilla #16072).
 190
 191 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
 192   pap_CW, quz_PE, the_NP.
 193
 194 * Substantially revised locales: gd_GB, ht_HT
 195
 196 * The LC_ADDRESS field was updated to support country_car for almost all
 197   supported locales.
 198
 199 * ISO 1427 definitions were updated.
 200
 201 * ISO 3166 definitions were updated.
 202
 203 * The localedef utility now supports --big-endian and --little-endian
 204   command-line options to generate locales for a different system from that
 205   for which the C library was built.
 206
 207 * Binary locale files now only depend on the endianness of the system for
 208   which they are generated and not on other properties of that system.  As a
 209   consequence, binary files generated with new localedef may be incompatible
 210   with old versions of the GNU C Library, and binary files generated with
 211   old localedef may be incompatible with this version of the GNU C Library,
 212   in the following circumstances:
 213
 214   + Locale files may be incompatible on m68k systems.
 215
 216   + Locale archive files (but not separate files for individual locales) may
 217     be incompatible on systems where plain "char" is signed.
 218
 219 * The configure option --disable-versioning has been removed.  Builds with
 220   --disable-versioning had not worked for several years.
 221
 222 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
 223   cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
 224
 225 * SystemTap probes for malloc have been introduced.
 226
 227 * SystemTap probes for slow multiple precision fallback paths of
 228   transcendental functions have been introduced.
 229
 230 * Support for powerpc64le has been added.
 231
 232 * The soft-float powerpc port now supports e500 processors.
 233
 234 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
 235
 236 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
 237   set of header declarations that are enabled by default, even when other
 238   feature test macros or compiler options such as -std=c99 would otherwise
 239   disable some of those declarations.
 240
 241 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
 242   conflict with POSIX.  The libbsd-compat library (which was a dummy library
 243   that did nothing) has also been removed.
 244
 245 * Preliminary documentation about Multi-Thread, Async-Signal and
 246   Async-Cancel Safety has been added.
 247
 248 * Change of ABI data structures for s390 and s390x:
 249   On s390 and s390x the size of struct ucontext and jmp_buf was increased to
 250   allow for future hardware extensions. All library functions that accept or
 251   return these structures were versioned in order to provide backwards
 252   compatibility with existing code. However, not all cases can be handled
 253   with interface versioning. If an application embeds either structure into
 254   another structure and that structure is passed to another compilation unit
 255   which expects the newer larger-sized object then any access to the new
 256   fields will result in undefined behaviour. Similarly any access to fields
 257   that were moved by the enlarging of the structures will cause undefined
 258   behaviour. To fix the undefined behaviour all objects that are part of the
 259   final in-memory image must agree on the size of structures, and this may
 260   require recompilation.
 261 \f
 262 Version 2.18
 263
 264 * The following bugs are resolved with this release:
 265
 266   2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
 267   11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
 268   14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
 269   14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
 270   14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
 271   15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
 272   15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
 273   15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
 274   15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
 275   15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
 276   15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
 277   15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
 278   15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
 279   15759.
 280
 281 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
 282   has been fixed by disabling the use of pt_chown (Bugzilla #15755).
 283   Distributions can re-enable building and using pt_chown via the new configure
 284   option `--enable-pt_chown'.  Enabling the use of pt_chown carries with it
 285   considerable security risks and should only be used if the distribution
 286   understands and accepts the risks.
 287
 288 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
 289   #15078).
 290
 291 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
 292   fixed (Bugzilla #15330).
 293
 294 * Add support for calling C++11 thread_local object destructors on thread
 295   and program exit.  This needs compiler support for offloading C++11
 296   destructor calls to glibc.
 297
 298 * Improved worst case performance of libm functions with double inputs and
 299   output.
 300
 301 * Support for priority inherited mutexes in pthread condition variables on
 302   non-x86 architectures.
 303
 304 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
 305
 306 * Optimized string functions for AArch64.  Implemented by Marcus Shawcroft.
 307
 308 * Optimized string functions for ARM.  Implemented by Will Newton and
 309   Richard Henderson.
 310
 311 * Optimized libm functions for SPARC.  Implemented by David S. Miller.
 312
 313 * Support for building more of ARM glibc as Thumb-2 code.  Implemented by
 314   Richard Henderson.
 315
 316 * Support for building most of MIPS glibc as MIPS16 code.  Implemented by
 317   Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
 318
 319 * Added a benchmark framework to track performance of functions in glibc.
 320
 321 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
 322   It is based on draft TS 18661 and currently enabled as a GNU extension.
 323
 324 * On Linux, the clock function now uses the clock_gettime system call
 325   for improved precision, rather than old times system call.
 326
 327 * Added support for version-3 tz format files.  This is needed when using
 328   the tz database release 2013e or later, and affects a few unusual cases --
 329   currently only TZ='America/Godthab' for time stamps after 2037.
 330
 331 * Added new API functions pthread_getattr_default_np and
 332   pthread_setattr_default_np to get and set the default pthread
 333   attributes of a process.
 334
 335 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
 336   This may improve lock scaling of existing programs on TSX capable systems.
 337   When the --enable-lock-elision=yes parameter is specified at configure
 338   time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
 339   mutexes.
 340
 341 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
 342   availability).  Implemented by Ryan S. Arnold.
 343
 344 * Support added for POWER8 platform.  Implemented by Ryan S. Arnold.
 345 \f
 346 Version 2.17
 347
 348 * The following bugs are resolved with this release:
 349
 350   1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
 351   9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
 352   11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
 353   13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
 354   13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
 355   14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
 356   14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
 357   14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
 358   14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
 359   14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
 360   14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
 361   14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
 362   14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
 363   14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
 364   14879, 14889, 14893, 14898, 14914.
 365
 366 * Optimization of memcpy for MIPS.
 367
 368 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
 369   EMFILE has been fixed (Bugzilla #14889).
 370
 371 * The add-on ports collection is now distributed in the "ports" subdirectory
 372   of the main GNU C Library distribution, rather than separately.
 373
 374 * Port to ARM AArch64 contributed by Linaro.
 375
 376 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
 377   Optimized versions of memcpy, memset, and memcmp added for System z10 and
 378   zEnterprise z196.
 379   Implemented by Andreas Krebbel.
 380
 381 * The new function secure_getenv allows secure access to the environment,
 382   returning NULL if running in a SUID/SGID process.  This function replaces
 383   the internal function __secure_getenv.
 384
 385 * SystemTap static probes have been added into the dynamic linker.
 386   Implemented by Gary Benson.
 387
 388 * Optimizations of string functions strstr, strcasestr and memmem.
 389   Implemented by Maxim Kuvyrkov.
 390
 391 * The minimum Linux kernel version that this version of the GNU C Library
 392   can be used with is 2.6.16.
 393
 394 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
 395   powerpc POWER7.  Implemented by Will Schmidt.
 396
 397 * New configure option --disable-nscd builds the C library such that it
 398   never attempts to contact the Name Service Caching Daemon (nscd).
 399   New configure option --disable-build-nscd avoids building nscd itself;
 400   this is the default if --disable-nscd is used.
 401
 402 * Improved support for cross-compilation, including cross-testing and
 403   bootstrap builds without a previously built glibc.
 404
 405 * Several testsuite tests are now able to test multiple IFUNC variants of an
 406   interface, rather than just testing the one that would be chooen by
 407   default.
 408
 409 * New configure options --with-bugurl and --with-pkgversion, for
 410   distributors to use to embed their bug-reporting and package version
 411   information in --help and --version output.
 412
 413 * The ttyname and ttyname_r functions on Linux now fall back to searching for
 414   the tty file descriptor in /dev/pts or /dev if /proc is not available.  This
 415   allows creation of chroots without the procfs mounted on /proc.
 416
 417 * The `crypt' function now fails if passed salt bytes that violate the
 418   specification for those values.  On Linux, the `crypt' function will
 419   consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
 420   enabled, and fail on encrypted strings using the MD5 or DES algorithm
 421   when the mode is enabled.
 422
 423 * The `clock_*' suite of functions (declared in <time.h>) is now available
 424   directly in the main C library.  Previously it was necessary to link with
 425   -lrt to use these functions.  This change has the effect that a
 426   single-threaded program that uses a function such as `clock_gettime' (and
 427   is not linked with -lrt) will no longer implicitly load the pthreads
 428   library at runtime and so will not suffer the overheads associated with
 429   multi-thread support in other code such as the C++ runtime library.
 430
 431 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
 432   sat_IN, and szl_PL.
 433 \f
 434 Version 2.16
 435
 436 * The following bugs are resolved with this release:
 437
 438   174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
 439   2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
 440   3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
 441   4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
 442   6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
 443   10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
 444   11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
 445   12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
 446   13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
 447   13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
 448   13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
 449   13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
 450   13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
 451   13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
 452   13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
 453   13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
 454   13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
 455   13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
 456   13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
 457   14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
 458   14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
 459   14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
 460   14277, 14278.
 461
 462 * Support for the x32 ABI on x86-64 added.  The x32 target is selected by
 463   configuring glibc with:
 464         BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
 465   Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
 466   Implemented by H.J. Lu.
 467
 468 * ISO C11 support:
 469
 470   + define static_assert
 471
 472   + do not declare gets
 473
 474   + declare at_quick_exit and quick_exit also for ISO C11
 475
 476   + aligned_alloc.  NB: The code is deliberately allows the size parameter
 477     to not be a multiple of the alignment.  This is a moronic requirement
 478     in the standard but it is only a requirement on the caller, not the
 479     implementation.
 480
 481   + timespec_get added
 482
 483   + uchar.h support added
 484
 485   + CMPLX, CMPLXF, CMPLXL added
 486
 487   Implemented by Ulrich Drepper.
 488
 489 * Support for the IA-64 has been moved to ports.
 490
 491 * Remove support for anything but ELF binary format
 492
 493 * Checking versions of poll, ppoll added.
 494   Implemented by Ulrich Drepper.
 495
 496 * More generic and 64-bit performance optimizations to math functions.
 497   Implemented by Ulrich Drepper.
 498
 499 * New configure option --enable-obsolete-rpc makes the deprecated RPC
 500   headers and functions available at compile time as they were before
 501   version 2.14.  This option will be removed at some time in the future
 502   after the TI-RPC library becomes fully sufficient for the needs of
 503   existing applications.
 504
 505 * Compatibility code for Linux kernel versions before 2.4 has been removed.
 506   Note that glibc is not expected to work with any Linux kernel version
 507   before 2.6.
 508
 509 * New header <sys/auxv.h> and function getauxval allowing easy access to
 510   the AT_* key-value pairs passed from the Linux kernel.  The header also
 511   defines the HWCAP_* bits associated with the AT_HWCAP key.
 512
 513 * New locales: mag_IN
 514
 515 * New configure option --enable-systemtap builds SystemTap static probes
 516   into libc for setjmp and longjmp and into libpthread for various operations.
 517   So far the setjmp/longjmp probes and some of the libpthread probes are
 518   provided only for i*86 and x86_64.
 519   Implemented by Roland McGrath and Rayson Ho.
 520
 521 * Optimized expf for x86-32 and x86-64.  Implemented by Liubov Dmitrieva.
 522
 523 * More optimized functions for PowerPC.  Implemented by Adhemerval Zanella
 524   and Will Schmidt.
 525
 526 * More optimized functions for SPARC.  Implemented by David S. Miller.
 527
 528 * Improved support for cross-compilation, especially bootstrap builds
 529   without a previously built glibc.
 530
 531 * Ports for the TILE-Gx and TILEPro families of processors.  Contributed by
 532   Chris Metcalf from Tilera.
 533
 534 * Support for the old ARM ABI has been removed from ports.  Only the EABI is
 535   now supported for ARM processors.
 536
 537 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
 538   as the name of the dynamic linker, to distinguish it from the
 539   /lib/ld-linux.so.3 dynamic linker used for the base EABI.
 540
 541 * Support for CRIS has been removed from ports.
 542
 543 * A new class of installed header has been documented for low-level
 544   platform-specific functionality.  PowerPC added the first instance with a
 545   function to provide time base register access.  Contributed by Tulio
 546   Magno Quites Machado Filho.
 547
 548 * ix86 configurations now install header files that are consistent with
 549   what x86-64 configurations install.  These same header files can be used
 550   for -m32, -m64, or -mx32 builds.
 551   Contributed by H.J. Lu.
 552
 553 * Math library bug fixes.  A thorough audit of all open math library bugs was
 554   conducted by Joseph Myers.  Significant progress was made on many math
 555   library bugs resulting in more accurate exceptions and function results.
 556   Many thanks to all those that contributed including Andreas Jaeger for his
 557   patch review and work on the x87 trigonometric instruction issues.
 558
 559 * Timezone data is no longer installed.  Timezone-related binaries and scripts
 560   will continue to be installed.  Users should obtain their timezone data from
 561   their distribution provider or from the tzdata package at
 562   <ftp://munnari.oz.au/pub/>.
 563 \f
 564 Version 2.15
 565
 566 * The following bugs are resolved with this release:
 567
 568   6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
 569   12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
 570   13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
 571   13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
 572   13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
 573   13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
 574   13484, 13506, 13515, 13523, 13524, 13538, 13540
 575
 576 * New program pldd to list loaded object of a process
 577   Implemented by Ulrich Drepper.
 578
 579 * Add nss_db support back to glibc.  No more dependency on Berkeley db
 580   and support for initgroups lookups.
 581   Implemented by Ulrich Drepper.
 582
 583 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
 584   Contributed by HJ Lu.
 585
 586 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
 587   Contributed by HJ Lu.
 588
 589 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
 590   on x86-32 and x86-64.
 591   Contributed by Liubov Dmitrieva.
 592
 593 * Optimized strchr and strrchr for SSE on x86-32.
 594   Contributed by Liubov Dmitrieva.
 595
 596 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
 597   for x86-64 and x86-32.
 598   Contributed by Liubov Dmitrieva.
 599
 600 * New interfaces: scandirat, scandirat64
 601   Implemented by Ulrich Drepper.
 602
 603 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
 604   Implemented by Ulrich Drepper.
 605
 606 * nscd now also caches the netgroup database.
 607   Implemented by Ulrich Drepper.
 608
 609 * Integrate libm with gcc's -ffinite-math-only option.
 610   Implemented by Ulrich Drepper.
 611
 612 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
 613   to math functions.  Implemented by Ulrich Drepper.
 614
 615 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
 616   Implemented by Ulrich Drepper.
 617
 618 * New Linux interfaces: process_vm_readv, process_vm_writev
 619
 620 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
 621   Implemented by Ulrich Drepper.
 622
 623 * Optimized nearbyint and strcasecmp for PPC.
 624   Implemented by Adhemerval Zanella.
 625
 626 * New locales: bho_IN, unm_US, es_CU, ta_LK
 627 \f
 628 Version 2.14
 629
 630 * The following bugs are resolved with this release:
 631
 632   386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
 633   11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
 634   11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
 635   11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
 636   12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
 637   12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
 638   12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
 639   12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
 640   12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
 641   12795, 12811, 12813, 12814, 12841
 642
 643 * The RPC implementation in libc is obsoleted.  Old programs keep working
 644   but new programs cannot be linked with the routines in libc anymore.
 645   Programs in need of RPC functionality must be linked against TI-RPC.
 646   The TI-RPC implementation is IPv6 enabled and there are other benefits.
 647
 648   Visible changes of this change include (obviously) the inability to link
 649   programs using RPC functions without referencing the TI-RPC library and the
 650   removal of the RPC headers from the glibc headers.
 651   Implemented by Ulrich Drepper.
 652
 653 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
 654   syncfs, setns, sendmmsg
 655
 656 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
 657   yue_HK, lij_IT, mhr_RU
 658
 659 * New encodings: CP770, CP771, CP772, CP773, CP774
 660
 661 * New program sotruss to trace calls through PLTs
 662   Implemented by Ulrich Drepper.
 663
 664 * The malloc hook implementation is marked deprecated and will be removed
 665   from the default implementation in the next version.  The design never
 666   worked ever since the introduction of threads.  Even programs which do
 667   not create threads themselves can use multiple threads created internally.
 668 \f
 669 Version 2.13
 670
 671 * The following bugs are resolved with this release:
 672
 673   3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
 674   11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
 675   12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
 676   12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
 677   12378, 12394, 12397
 678
 679 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
 680
 681 * POWER7 optimizations: memset, memcmp, strncmp
 682
 683 * New optimized string functions for x86-64: strnlen (SSE2),
 684   strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
 685   Implemented by Ulrich Drepper.
 686 \f
 687 Version 2.12
 688
 689 * The following bugs are resolved with this release:
 690
 691   3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
 692   10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
 693   11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
 694   11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
 695   11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
 696   11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
 697   11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
 698   11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
 699
 700 * New interfaces: pthread_getname_np, pthread_setname_np
 701
 702 * New Linux interface: recvmmsg
 703
 704 * STT_GNU_IFUNC implemented for Sparc by David Miller.
 705
 706 * The dynamic linker now recognizes supported ABI versions from the
 707   EI_ABIVERSION field in the ELF header.
 708   Implemented by Ulrich Drepper.
 709
 710 * New NIS mode selector ADJUNCT_AS_SHADOW.  The passwd.adjunct.byname table
 711   will not be used to fill in password fields in the passwd.byname replies.
 712   Instead it is used to synthesize the shadow.byname table, should it be
 713   missing.  This is a useful mode in some installations involving Solaris.
 714   Implemented by Ulrich Drepper.
 715
 716 * New locales: kok_IN, sq_MK, cv_RU
 717 \f
 718 Version 2.11
 719
 720 * The following bugs are resolved with this release:
 721
 722   3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
 723   10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
 724   10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
 725   10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
 726   10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
 727   10789, 10817, 10823, 10840, 10847
 728
 729 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
 730   mkostemps64
 731   Implemented by Ulrich Drepper.
 732
 733 * Checking version of longjmp added that fails if an uninitialized stack
 734   frame would be created.  Implemented by Ulrich Drepper.
 735
 736 * STT_GNU_IFUNC is now supported in static executables.
 737   Implemented by H.J. Lu.
 738
 739 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
 740
 741 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
 742   strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
 743   strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
 744   Contributed by H.J. Lu.
 745
 746   strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
 747   Implemented by Ulrich Drepper.
 748
 749 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
 750   strstr, strcasestr.
 751   Contributed by H.J. Lu.
 752
 753 * Support for fma instruction in AVX on x86-64.
 754   Implemented by H.J. Lu and Ulrich Drepper.
 755
 756 * AVX support in x86-64 auditing support in ld.so.
 757   Implemented by H.J. Lu.
 758
 759 * STB_GNU_UNIQUE support added.
 760   Implemented by Ulrich Drepper.
 761
 762 * Implement second fallback mode for optimized DNS lookup for even more
 763   broken environments.  If two requests from the same port are not
 764   handled correctly close the socket and open a new one before sending
 765   the second request.  The 'single-request-reopen' option in /etc/resolv.conf
 766   can be used to select this mode right away, instead of rediscovering the
 767   necessity is every process again.
 768   Implemented by Ulrich Drepper.
 769
 770 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
 771   Implemented by Adam Tkac.
 772
 773 * Optimized iconv conversions for S390x.
 774   Implemented by Andreas Krebbel.
 775
 776 * Using condvars with PI mutexes is now more efficient due to kernel
 777   support for requeueing to PI futexes.  NPTL support added for x86-64.
 778   Implemented by Ulrich Drepper.
 779
 780 * New locales: ps_AF, my_MM
 781 \f
 782 Version 2.10
 783
 784 * The following bugs are resolved with this release:
 785
 786   697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
 787   9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
 788   9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
 789   9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
 790   10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
 791
 792 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
 793   Implemented by Ulrich Drepper.
 794
 795 * New Linux interfaces: accept4, fallocate, fallocate64.
 796   Implemented by Ulrich Drepper.
 797
 798 * Correct declarations of string function when used in C++ code.  This
 799   could lead to compile errors for invalid C++ code.
 800
 801 * XPG7/POSIX 2008 compilation environment.  Many GNU-specific functions are
 802   now in POSIX.
 803
 804 * New POSIX 2008 interface: psiginfo
 805   Implemented by Ulrich Drepper.
 806
 807 * New ISO C++1x interfaces: quick_exit, at_quick_exit
 808   Implemented by Ulrich Drepper.
 809
 810 * Support for selecting between multiple function definitions at runtime
 811   using STT_GNU_IFUNC symbols.  Implemented by Ulrich Drepper.
 812
 813 * The libcrypt library can now use the hash function implementations in
 814   NSS.  Implemented by Ulrich Drepper.
 815
 816 * The malloc implementation can be compiled to be less memory efficient
 817   but higher performing in multi-threaded programs.
 818   Implemented by Ulrich Drepper.
 819
 820 * New locales: nan_TW@latin, ks_IN
 821
 822 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
 823   Implemented by Ulrich Drepper.
 824
 825 * Extended printf hook support.  It is possible to use user-defined types
 826   and extend existing format specifiers.
 827   Implemented by Ulrich Drepper.
 828
 829 * Handling for group shadow files has been added.
 830   Implemented by Ulrich Drepper.
 831
 832 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
 833   servers (the case, e.g., for some people using the built-in DNS
 834   server in ADSL modems/routers).  There is a once-per-process timeout
 835   in case of a broken server.  To avoid it, users can run nscd or put
 836   'options single-request' in /etc/resolv.conf.
 837   Implemented by Ulrich Drepper.
 838 \f
 839 Version 2.9
 840
 841 * The following bugs are resolved with this release:
 842
 843   3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
 844   6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
 845   6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
 846   6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
 847   6968, 6974, 6980, 6995, 7008, 7009, 7029
 848
 849 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
 850   up at the same time.  Implemented by Ulrich Drepper.
 851
 852 * TLS descriptors for LD and GD on x86 and x86-64.
 853   Implemented by Alexandre Oliva.
 854
 855 * getaddrinfo now handles DCCP and UDPlite.
 856   Implemented by Ulrich Drepper.
 857
 858 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
 859   htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
 860   Implemented by Ulrich Drepper.
 861
 862 * New implementation of memmem, strstr, and strcasestr which is O(n).
 863   Implemented by Eric Blake.
 864
 865 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
 866
 867 * Implement "e" option for popen to open file descriptor with the
 868   close-on-exec flag set.  Implemented by Ulrich Drepper.
 869
 870 * Implement "b" mode for fmemopen.  In this mode writes writes don't
 871   implicitly add a NUL byte and seeks from the end of the buffer really
 872   use the buffer end, not the string length as the basis.
 873   Implemented by Ulrich Drepper.
 874
 875 * Many functions, exported and internal, now atomically set the close-on-exec
 876   flag when run on a sufficiently new kernel.  Implemented by Ulrich Drepper.
 877
 878 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
 879   Sinhala)
 880   Implemented by Pravin Satpute.
 881
 882 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
 883 \f
 884 Version 2.8
 885
 886 * The following bugs are resolved with this release:
 887
 888   2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
 889   5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
 890   5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
 891   5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
 892   5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
 893   5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
 894   5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
 895
 896 * New locales: bo_CN, bo_IN, shs_CA.
 897
 898 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
 899
 900 * Sorting rules for some Indian languages (Devanagari and Gujarati).
 901   Implemented by Pravin Satpute.
 902
 903 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
 904
 905 * nscd caches now all timeouts for DNS entries
 906   Implemented by Ulrich Drepper.
 907
 908 * nscd is more efficient and wakes up less often.
 909   Implemented by Ulrich Drepper.
 910
 911 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
 912   vdprintf, and obstack_vprintf.
 913   Implemented by Jakub Jelinek.
 914
 915 * Faster memset for x86-64.
 916   Implemented by Harsha Jagasia and H.J. Lu.
 917
 918 * Faster memcpy on x86.
 919   Implemented by Ulrich Drepper.
 920
 921 * ARG_MAX is not anymore constant on Linux.  Use sysconf(_SC_ARG_MAX).
 922   Implemented by Ulrich Drepper.
 923
 924 * Faster sqrt and sqrtf implemention for some PPC variants.
 925   Implemented by Steven Munroe.
 926 \f
 927 Version 2.7
 928
 929 * The following bugs are resolved with this release:
 930
 931   4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
 932   4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
 933   4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
 934   4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
 935   5071, 5103, 5104, 5112, 5113, 5184, 5186
 936
 937 * More checking functions: fread, fread_unlocked, open*, mq_open.
 938   Implemented by Jakub Jelinek and Ulrich Drepper.
 939
 940 * Extend fortification to C++.  Implemented by Jakub Jelinek.
 941
 942 * Implement 'm' modifier for scanf.  Add stricter C99/SUS compliance
 943   by not recognizing 'a' as a modifier when those specs are requested.
 944   Implemented by Jakub Jelinek.
 945
 946 * PPC optimizations to math and string functions.
 947   Implemented by Steven Munroe.
 948
 949 * New interfaces: mkostemp, mkostemp64.  Like mkstemp* but allow additional
 950   options to be passed.  Implemented by Ulrich Drepper.
 951
 952 * More CPU set manipulation functions.  Implemented by Ulrich Drepper.
 953
 954 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
 955   Implemented by Ulrich Drepper.
 956
 957 * Handle private futexes in the NPTL implementation.
 958   Implemented by Jakub Jelinek and Ulrich Drepper.
 959
 960 * Add support for O_CLOEXEC.  Implement in Hurd.  Use throughout libc.
 961   Implemented by Roland McGrath and Ulrich Drepper.
 962
 963 * Linux/x86-64 vDSO support.  Implemented by Ulrich Drepper.
 964
 965 * SHA-256 and SHA-512 based password encryption.
 966   Implemented by Ulrich Drepper.
 967
 968 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
 969   ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
 970   yo_NG.
 971
 972 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
 973   Implemented by Ulrich Drepper.
 974 \f
 975 Version 2.6
 976
 977 * The following bugs are resolved with this release:
 978
 979   3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
 980   3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
 981   3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
 982   3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
 983   3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
 984   4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
 985   4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
 986   4702, 4858
 987
 988 * New Linux interfaces: epoll_pwait, sched_getcpu.
 989
 990 * New generic interfaces: strerror_l.
 991
 992 * nscd can now cache the services database.   Implemented by Ulrich Drepper.
 993 \f
 994 Version 2.5
 995
 996 * The following bugs are resolved with this release:
 997
 998   39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
 999   1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1000   2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1001   2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1002   2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1003   2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1004   2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1005   3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1006   3225, 3251, 3252, 3253, 3273
1007
1008 * For Linux, the sorting of addresses returned by getaddrinfo now also
1009   handles rules 3, 4, and 7 from RFC 3484.  I.e., all rules are handled.
1010   Implemented by Ulrich Drepper.
1011
1012 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1013   Implemented by Ulrich Drepper.
1014
1015 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1016
1017 * New iconv module for MIK.  Contributed by Alexander Shopov.
1018
1019 * For sites with broken group and/or passwd database, the auto-propagate
1020   option of nscd can prevent creating ID lookup entries from the results
1021   of a name lookup and vice versa.   This usually is no problem but some
1022   site might have problems with the default behavior.
1023   Implemented by Ulrich Drepper.
1024
1025 * Iterating over entire database in NIS can be slow.  With the
1026   SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1027   to trade time for memory.  The entire database will be read at once.
1028   Implemented by Ulrich Drepper.
1029
1030 * The interfaces introduced in RFC 3542 have been implemented by
1031   Ulrich Drepper.
1032
1033 * Support for the new ELF hash table format was added by Ulrich Drepper.
1034
1035 * Support for priority inheritance mutexes added by Jakub Jelinek and
1036   Ulrich Drepper.
1037
1038 * Support for priority protected mutexes added by Jakub Jelinek.
1039
1040 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1041   or_IN, csb_PL, fy_NL, sr_ME.
1042 \f
1043 Version 2.4
1044
1045 * More overflow detection functions.
1046
1047 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1048   IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1049
1050   More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1051   IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1052   IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1053   IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1054   IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1055   by Masahide Washizawa.
1056
1057 * It is now possible to install audit libraries for the dynamic linker using
1058   LD_AUDIT.  Implemented by Ulrich Drepper.
1059
1060 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1061   longer supported.  The new NPTL implementation requires Linux 2.6 kernels.
1062   For a libc and libpthread that works well on Linux 2.4 kernels, we
1063   recommend using the stable 2.3 branch.
1064
1065 * The new function open_wmemstream acts like open_memstream,
1066   but uses a wchar_t wide character buffer.
1067
1068 * The new function ppoll is an improved version of poll, similar to pselect.
1069
1070 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1071   futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1072   renameat, unlinkat, linkat, symlinkat, readlinkat.
1073
1074 * New Linux kernel system calls: unshare,
1075   inotify_init, inotify_add_watch, inotify_rm_watch.
1076
1077 * The euidaccess function is now also known by the alias eaccess,
1078   for compatibility with some other systems.
1079
1080 * Timezone data updated to 2006b version.
1081 \f
1082 Version 2.3.6
1083
1084 * The following bugs are resolved with this release:
1085
1086   38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1087   1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1088   1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1089   1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1090   1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1091   1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1092
1093   Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1094
1095 * As of this release, GCC 4 can be used to compile the C Library.
1096
1097 * Timezone data updated to 2005m version.
1098 \f
1099 Version 2.3.5
1100
1101 * The following bugs are resolved with this release:
1102
1103   284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1104   722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1105   737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1106   777, 787, 821, 822, 823, 825
1107
1108   Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1109 \f
1110 Version 2.3.4
1111
1112 * Support for RFC 3678.  Real implementations exist only for Linux so far.
1113   Implemented by Ulrich Drepper.
1114
1115 * nscd can now cache entries persistently.  Expiring entries are reloaded.
1116   For speedups the cache can be shared in memory with client processes.
1117   Implemented by Ulrich Drepper.
1118
1119 * nscd can now perform SELinux checks.
1120   Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1121
1122 * getaddrinfo queries are now cached.  Canonical name lookup is performed
1123   efficiently.
1124   Implemented by Ulrich Drepper.
1125
1126 * The nothrow function attribute is used when headers are used by gcc when
1127   compiling C code.  This can avoid significant amounts of exception
1128   handling data.
1129
1130 * The malloc functions perform more error checking and are stricter when
1131   it comes to reacting on errors.  The default action is to terminate
1132   the process after showing an error message.  Implemented by Ulrich Drepper.
1133
1134 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1135   lookups anymore unless explicitly requested.  Implemented by Ulrich Drepper.
1136
1137 * Namespaces in ld.so are implemented.  DSOs can be loaded in separate
1138   namespaces using the new function dlmopen().  This feature is of course,
1139   like most other dynamic loading functionality, not available in statically
1140   linked applications.  Implemented by Ulrich Drepper.
1141
1142 * Low-overhead boundary checking variants of string and some stdio functions
1143   were added.  These are to be used in conjunction with a gcc patch by
1144   Jakub Jelinek which adds calls to these functions if possible.
1145   Implemented by Jakub Jelinek and Ulrich Drepper.
1146
1147 * Old code for several operating systems and machine architectures that
1148   have not been in working condition in a long time have been removed from
1149   the main source tree maintained by the GNU C Library's maintainers.
1150   These files are now reside in the separate `ports' source module
1151   that is usable as an add-on when building the library.
1152 \f
1153 Version 2.3.3
1154
1155 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1156   interrogate the dynamic linker, compatible with the Solaris interface.
1157
1158 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1159   implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1160
1161 * getifaddrs now uses the netlink interface on Linux to get its information.
1162   Implemented by Thorsten Kukuk.
1163
1164 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1165   Implemented by Ulrich Drepper.
1166
1167 * support for non-executable stacks on x86 has been added.  Changes mostly
1168   by Roland McGrath.
1169
1170 * regex is now much faster for multibyte locales.  Changes by Jakub Jelinek
1171   and Ulrich Drepper.
1172
1173 * getaddrinfo now performs destination address selection according to
1174   RFC 3484.
1175 \f
1176 Version 2.3.2
1177
1178 * Thread-safe interfaces for many functions that access locale data
1179   were added in version 2.3, but these features were omitted from NEWS.
1180   Many functions have variants with an `_l' suffix that take a `locale_t'
1181   object as a parameter rather than consulting the current locale.
1182   The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1183   create and maintain `locale_t' objects.  Additionally, the new function
1184   `uselocale' sets "the current locale" (as used by functions not so
1185   parameterized) set for an individual thread.  These features were added
1186   in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1187
1188 * The functions getresuid, getresgid, setresuid, and setresgid, which
1189   have long been available on Linux, are now declared in <unistd.h>
1190   and are now also available on the Hurd.
1191
1192 * ELF thread-local storage support (TLS) now works on x86-64.
1193
1194 * The new dynamic string token $LIB is expanded in shared library names.
1195   This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1196
1197 * Aldy Hernandez contributed complete software floating point support for
1198   PowerPC machines with no FPU.
1199
1200 * fexecve is implemented on Linux.
1201
1202 * The `btowc' function should work at least twice as fast due to
1203   specialized callbacks in the iconv modules.  Implemented by Bruno Haible.
1204
1205 * With approriate thread add-ons cancelable functions are now implemented
1206   in libc.so as well.  No need to call the function in libpthread.  This
1207   change allowed to finally disable the incorrect and expensive handling
1208   of weak definition in ld.so.
1209
1210 * Yet more PLT entries in libc.so have been removed.  We finally arrived
1211   at the bare minimum.  Startup times improved appropriately.
1212
1213 * Support for the new Linux/x86 system call interface was added.  The
1214   AT_SYSINFO auxiliary vector entry is recognized and handled.
1215 \f
1216 Version 2.3
1217
1218 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1219   charsets.
1220
1221 * iconv (the program and the interface) now accepts empty names (excluding
1222   options like //TRANSLIT) to mean "use charset of current locale".
1223
1224 * localedef can now transliterate characters in strings which are not in
1225   the provided charmap.  The information from the input locale is used.
1226
1227 * Prelinking support was added for ELF targets.  This requires additional
1228   tools and recent versions of the GNU binutils.  Contributed by Jakub Jelinek.
1229
1230 * Read-only stdio streams now use mmap to speed up operation by eliminating
1231   copying and buffer underflows.  To use add 'm' to the mode string of
1232   the fopen/fdopen/freopen call.  Implemented by Ulrich Drepper.
1233
1234 * The malloc functions were completely rewritten by Wolfram Gloger based
1235   on Doug Lea's malloc-2.7.0.c.
1236
1237 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1238   implementation of regex.
1239
1240 * Bruno Haible upgraded the iconv and locale implementation to support
1241   Unicode 3.2.
1242
1243 * Contents of the LC_* and LANG environment variables in the CEN style are
1244   not recognized anymore.   It never was used.  Change by Ulrich Drepper.
1245
1246 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1247   thread-local storage (TLS) ABI on some platforms.
1248   Changes by Ulrich Drepper.  SH support by Kaz Kojima.
1249
1250 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1251   EUC-JISX0213, and TSCII.
1252
1253 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1254   BSD-compatible interface for getting all network interface addresses.
1255   Implementation for IPv4 by Roland McGrath.
1256
1257 * Loading of locale data is faster due to the introduction of a locale
1258   archive.  Implemented by Roland McGrath and Ulrich Drepper.
1259
1260 * Startup times are significantly reduced by not using exported functions
1261   inside the library itself.  Changes by Jakub Jelinek, Roland McGrath,
1262   and Ulrich Drepper.
1263
1264 * Steven Munroe contributed a port to PowerPC64/Linux.
1265 \f
1266 Version 2.2.6
1267
1268 * The Hurd now uses the GNU libio implementation of stdio rather than the
1269   old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1270
1271 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1272   with the same behavior as the Linux system call of the same name.
1273 \f
1274 Version 2.2.5
1275
1276 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1277   128-bit long double format.
1278
1279 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1280   IBM1161, and IBM1162 charsets.
1281
1282 * Andreas Jaeger contributed a port to x86-64/Linux.
1283
1284 * Peter Bruin contributed a port to PowerPC/Hurd.
1285
1286 * libc functions using I/O streams now can handle wide-oriented streams
1287   as well.
1288
1289 * optimizations in the dynamic linker.  Binaries created by recent binutils
1290   versions start up quicker due to reduced time spent on relocations.
1291
1292 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1293 \f
1294 Version 2.2.4
1295
1296 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1297   asinh, atanh, j0 for the 128-bit long double format.
1298
1299 * Bruno Haible updated all the code handling Unicode in some form to
1300   support Unicode 3.1.
1301
1302 * Speed of regex for single-byte locales is back to previous levels.
1303   Patch by Isamu Hasegawa.
1304
1305 * Alpha, SPARC, and IA-64 now also using floating stacks.
1306
1307 * Startup time of internationalized applications greatly improved through
1308   iconv cache.  Use iconvconfig to generate the cache file.
1309   Contributed by Ulrich Drepper.
1310
1311 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1312   severe performance problems.  Patch by David Mosberger.
1313
1314 * The Hurd port got a lot more functionality like AIO, various stdio
1315   extensions, etc.  Mainly done by Roland McGrath.
1316
1317 * mtrace can now lookup symbols in shared libraries.
1318 \f
1319 Version 2.2.3
1320
1321 * Intel's IA-64 math library is largely integrated.  It provides fast and
1322   accurate implementatations for most basic and standard math functions
1323   in float, double, and long double format.
1324
1325 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1326   and asin for the 96-bit long double format and asin, log, tan for the
1327   128-bit long double format.
1328
1329 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1330   The basic double functions exist today.  Contributed by Abraham Ziv
1331   <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1332   <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1333
1334 * An asynchronous name lookup library was added.  The interface is designed
1335   after POSIX AIO.  The proposal was circulated beforehand to get comments.
1336   No negative ones came in.  Implemented by Ulrich Drepper.
1337
1338 * Port to S390/64bit contributed by Martin Schwidefsky
1339   <schwidefsky@de.ibm.com>.
1340
1341 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1342   of functions for Linux/IA-64.
1343
1344 * The RPC code is now thread safe.  Threads can now use the same service
1345   of different services at the same time.  Patch by Eric Norum
1346   <eric.norum@usask.ca> with some help by Ulrich Drepper.
1347
1348 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1349   family of functions for Linux/S390.
1350
1351 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1352   of functions for Linux/x86.
1353
1354 * Port to Linux/CRIS contributed by Axis Communications.
1355 \f
1356 Version 2.2.2
1357
1358 * Lots of headers were cleaned up.  Using the tool in the conform/ subdir
1359   we can now check for namespace violations and missing declarations.  The
1360   result is that almost all headers are now Unix-compliant (as defined in
1361   the upcoming XPG6).  The negative side is that some programs might need
1362   corrections, too, if they depend on the incorrect form of the headers in
1363   previous versions which defined too many symbols and included too many
1364   other headers.
1365
1366 * regex now handles multibyte character sets correctly.
1367   Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1368
1369 * iconv (the program) does now conform to the upcoming XPG6 and handles
1370   charmaps.  Instead of the charset names the path of charmaps can be
1371   provided and the conversion happens based on this data.
1372   Contributed by Ulrich Drepper.
1373
1374 * The locale program now provides detailed information about the installed
1375   locales.  While
1376
1377     locale -a
1378
1379   only lists the names of the supported locales
1380
1381     locale -a --verbose
1382
1383   provides details such as country, language, and codeset name.
1384   Contributed by Ulrich Drepper.
1385 \f
1386 Version 2.2.1
1387
1388 * The gencat program now parses the input file according to the charset
1389   selected by the LC_CTYPE category.  This is important for stateful
1390   character sets.  To make generating catalogs easier there is a way
1391   to overwrite the charset selected by the locale: before the first
1392   message or $ quote line the catalog can contain a line like
1393
1394     $ codeset=ISO-8859-2
1395
1396   to select the charset (ISO-8859-2 in this case).
1397
1398   Implemented by Shinya Hanataka and Ulrich Drepper.
1399
1400 * New codeset conversion modules: IBM-922  (Estonia PC codeset),
1401   IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1402   Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1403
1404 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1405   <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1406
1407 * The LANGUAGE environment variable is now ignored unless the locale is
1408   changed from the default "C" locale.
1409
1410 * The usual bug fixes.
1411 \f
1412 Version 2.2
1413
1414 * Greg McGary added runtime support for bounds checking using gcc's
1415   new -fbounded-pointers option.  ix86 target is complete.  PowerPC
1416   is in progress.
1417
1418 * Thorsten Kukuk added secure mode support to nscd.
1419
1420 * The Berkeley db libraries have been removed.
1421
1422   Related, the nss_db module is now in a separate package since it
1423   obviously requires a database library being available.
1424
1425 * Wide character I/O streams implemented by Ulrich Drepper.
1426
1427 * Functions from the extended socket API added by Ulrich Drepper.
1428
1429 * Functions feenableexcept and fedisableexcept to control the
1430   behaviour of individual exceptions have been added by Andreas Jaeger.
1431
1432 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1433
1434 * The resolver code has been updated from bind 8.2.3-T5B which supports
1435   threads.  The integration was done by Andreas Jaeger, Adam D. Bradley,
1436   and Mark Kettenis.
1437
1438   This change could in some situations effect backward compatibility.  Since
1439   now `_res' is a thread-local instead of a global variable, modifying it
1440   in one thread does not have any effect in other threads.
1441
1442   The resolver library was also extended to allow IPv6 as the transport
1443   protocol for the requests.  This work was done by Stig Venaas.
1444
1445 * Compatibility code for K&R C compilers has been removed from the
1446   header files.  A ISO C compiler is needed to use the library
1447   (conforming to either C89 or C99 standard).
1448
1449 * Complete rewrite of the localedef program to support multibyte character
1450   sets.  Implement handling of ISO 14651 and ISO 14652.  Rewrite strcoll,
1451   strxfrm, wcscoll, and wcsxfrm functions.  Make isw*() functions work.
1452   Implemented by Ulrich Drepper.
1453
1454   Bruno Haible significantly improved the generation and use of the data
1455   structures for the wide character tables.
1456
1457 * Plural handling in gettext implemented by Ulrich Drepper.
1458
1459 * The utmp daemon has been removed.
1460
1461 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1462
1463 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1464   and Yutaka Niibe.
1465
1466 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1467
1468 * POSIX barriers implemented by Kaz Kylheku.
1469
1470 * POSIX spawn function family implemented by Ulrich Drepper.
1471
1472 * POSIX spinlocks are now available.
1473
1474 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1475
1476 * the configure option --enable-kernel=X.Y.Z allows to strip out
1477   compatibility for kernel versions before X.Y.Z.  This is currently only
1478   implemented for Linux.
1479
1480 * the sockaddr_in6 structure changed.  The IPv6 working group added a new
1481   field sin6_scope_id.  This means that all programs using IPv6 should be
1482   recompiled.  Don't expect binary compatibility with previous glibc
1483   versions.
1484
1485 * various conversion modules for IBM character sets contributed by
1486   Masahide Washizawa.
1487
1488 * IA-64 port by Jes Sorensen and HJ Lu.
1489 \f
1490 Version 2.1.3
1491
1492 * bug fixes
1493
1494 \f
1495 Version 2.1.2
1496
1497 * bug fixes
1498
1499 \f
1500 Version 2.1.1
1501
1502 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1503
1504 * New xdr functions are added; some rpc functions are now 64bit clean.
1505
1506 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1507
1508 * Fixed known incompatibilities with glibc 2.0.
1509
1510 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1511
1512 * Optimized a number of functions (especially the ELF dynamic loader).
1513
1514 * Update timezone data files.
1515
1516 * lots of charmaps corrections
1517
1518 * some new locale definitions and charmaps
1519
1520 \f
1521 Version 2.1
1522
1523 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1524   conform to POSIX member type requirements.  Symbol versions have been
1525   adjusted as needed within the library, and for direct use by applications,
1526   but there is potential for problems if third-party libraries use
1527   struct timeval as part of their interface.  This does not present
1528   a problem for X and other "essential" system libraries.
1529
1530 * An additional locale model to support C++ Standard Library locale
1531   model and probably more was implemented by Ulrich Drepper.
1532
1533 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1534   symbol level.
1535
1536 * Miles Bader provided the `argp' function family to support hierachical
1537   command line argument parsing, layered on top of getopt.
1538
1539 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1540
1541 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1542   numbers.
1543
1544 * scanf recognizes the %a and %A format for scanning floating point numbers.
1545
1546 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1547   information and interfaces for the available integer types.
1548
1549 * about 130 new math functions were added to implement the ISO C9x math
1550   library.
1551
1552 * the new header <complex.h> contains definitions of the complex math
1553   functions from ISO C 9X.
1554
1555 * the new header <tgmath.h> defines generic macros to use complex or
1556   real valued functions.
1557
1558 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1559
1560 * Andreas Jaeger provided a test suite for the math library.
1561
1562 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1563
1564 * Ulrich Drepper added character set conversion functions (iconv).
1565
1566 * Optimized string functions have been added.
1567
1568 * The localedata addon is now part of glibc.
1569
1570 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1571
1572 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1573   daemon for NSS (nscd).
1574
1575   Missing a better place here are some numbers on improvements.  Under
1576   Linux 2.1.125 un-tar-ing the kernel sources takes
1577
1578                                   user  system     wall
1579
1580     using local files           12.19s   6.88s   22.91s
1581
1582     using NIS                   13.92s   8.91s   26.34s
1583
1584     using NIS & nscd            10.37s   7.34s   25.30s
1585
1586     using NIS+                  27.57s  30.37s  640.46s
1587
1588     using NIS+ & nscd           10.25s   7.83s   26.51s
1589
1590     using NIS & old nscd [1]    13.83s   8.32s   29.60s
1591
1592   Keep in mind that non-namelookup related operations dominate above times.
1593   It was just a common complain that using NIS+ unpacking the kernel is
1594   horribly slow.
1595
1596   [1] The old nscd implementation is not available anymore since it was
1597   distributed with glibc up to version 2.0.98 and thus is now replaced.
1598
1599 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1600
1601 * Mark Kettenis provided a Hesiod NSS module.
1602
1603 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1604   and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1605
1606 * rcmd can now handle netgroups (Dick Streefland).
1607
1608 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1609   Bambrough.
1610
1611 * Support for the IPv6 protocol has been added to the socket API, as per the
1612   latest draft standards.
1613
1614 * Support for Linux 2.2 has been added.
1615
1616 * Interface changes relative to the latest 2.0.x release:
1617 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1618 addseverity                     NEW: Unix98
1619 alphasort64                     NEW: LFS
1620 argp_err_exit_status            NEW: argp, GNU ext
1621 argp_error                      NEW: argp, GNU ext
1622 argp_failure                    NEW: argp, GNU ext
1623 argp_help                       NEW: argp, GNU ext
1624 argp_parse                      NEW: argp, GNU ext
1625 argp_program_bug_address        NEW: argp, GNU ext
1626 argp_program_version            NEW: argp, GNU ext
1627 argp_program_version_hook       NEW: argp, GNU ext
1628 argp_state_help                 NEW: argp, GNU ext
1629 argp_usage                      NEW: argp, GNU ext
1630 authdes_create                  NEW: Secure RPC
1631 authdes_getucred                NEW: Secure RPC
1632 authdes_pk_create               NEW: Secure RPC
1633 backtrace                       NEW: GNU ext.
1634 backtrace_symbols               NEW: GNU ext.
1635 backtrace_symbols_fd            NEW: GNU ext.
1636 cacos                           NEW: ISO C 9x
1637 cacosf                          NEW: ISO C 9x
1638 cacosh                          NEW: ISO C 9x
1639 cacoshf                         NEW: ISO C 9x
1640 cacoshl                         NEW: ISO C 9x
1641 cacosl                          NEW: ISO C 9x
1642 capget                          NEW: kernel
1643 capset                          NEW: kernel
1644 carg                            NEW: ISO C 9x
1645 cargf                           NEW: ISO C 9x
1646 cargl                           NEW: ISO C 9x
1647 casin                           NEW: ISO C 9x
1648 casinf                          NEW: ISO C 9x
1649 casinh                          NEW: ISO C 9x
1650 casinhf                         NEW: ISO C 9x
1651 casinhl                         NEW: ISO C 9x
1652 casinl                          NEW: ISO C 9x
1653 catan                           NEW: ISO C 9x
1654 catanf                          NEW: ISO C 9x
1655 catanh                          NEW: ISO C 9x
1656 catanhf                         NEW: ISO C 9x
1657 catanhl                         NEW: ISO C 9x
1658 catanl                          NEW: ISO C 9x
1659 cbc_crypt                       NEW: Secure RPC
1660 ccos                            NEW: ISO C 9x
1661 ccosf                           NEW: ISO C 9x
1662 ccosh                           NEW: ISO C 9x
1663 ccoshf                          NEW: ISO C 9x
1664 ccoshl                          NEW: ISO C 9x
1665 ccosl                           NEW: ISO C 9x
1666 cexp                            NEW: ISO C 9x
1667 cexpf                           NEW: ISO C 9x
1668 cexpl                           NEW: ISO C 9x
1669 cimag                           NEW: ISO C 9x
1670 cimagf                          NEW: ISO C 9x
1671 cimagl                          NEW: ISO C 9x
1672 clearerr_locked                 REMOVED
1673 clntunix_create                 NEW: sunrpc ext
1674 clog                            NEW: ISO C 9x
1675 clog10                          NEW: ISO C 9x
1676 clog10f                         NEW: ISO C 9x
1677 clog10l                         NEW: ISO C 9x
1678 clogf                           NEW: ISO C 9x
1679 clogl                           NEW: ISO C 9x
1680 conj                            NEW: ISO C 9x
1681 conjf                           NEW: ISO C 9x
1682 conjl                           NEW: ISO C 9x
1683 cpow                            NEW: ISO C 9x
1684 cpowf                           NEW: ISO C 9x
1685 cpowl                           NEW: ISO C 9x
1686 cproj                           NEW: ISO C 9x
1687 cprojf                          NEW: ISO C 9x
1688 cprojl                          NEW: ISO C 9x
1689 creal                           NEW: ISO C 9x
1690 crealf                          NEW: ISO C 9x
1691 creall                          NEW: ISO C 9x
1692 creat64                         NEW: LFS
1693 csin                            NEW: ISO C 9x
1694 csinf                           NEW: ISO C 9x
1695 csinh                           NEW: ISO C 9x
1696 csinhf                          NEW: ISO C 9x
1697 csinhl                          NEW: ISO C 9x
1698 csinl                           NEW: ISO C 9x
1699 csqrt                           NEW: ISO C 9x
1700 csqrtf                          NEW: ISO C 9x
1701 csqrtl                          NEW: ISO C 9x
1702 ctan                            NEW: ISO C 9x
1703 ctanf                           NEW: ISO C 9x
1704 ctanh                           NEW: ISO C 9x
1705 ctanhf                          NEW: ISO C 9x
1706 ctanhl                          NEW: ISO C 9x
1707 ctanl                           NEW: ISO C 9x
1708 des_setparity                   NEW: Secure RPC
1709 ecb_crypt                       NEW: Secure RPC
1710 endutxent                       NEW: Unix98
1711 exp10                           NEW: ISO C 9x
1712 exp10f                          NEW: ISO C 9x
1713 exp10l                          NEW: ISO C 9x
1714 exp2                            NEW: ISO C 9x
1715 exp2f                           NEW: ISO C 9x
1716 exp2l                           NEW: ISO C 9x
1717 fattach                         NEW: STREAMS
1718 fdetach                         NEW: STREAMS
1719 fdim                            NEW: ISO C 9x
1720 fdimf                           NEW: ISO C 9x
1721 fdiml                           NEW: ISO C 9x
1722 feclearexcept                   NEW: ISO C 9x
1723 fegetenv                        NEW: ISO C 9x
1724 fegetexceptflag                 NEW: ISO C 9x
1725 fegetround                      NEW: ISO C 9x
1726 feholdexcept                    NEW: ISO C 9x
1727 feof_locked                     REMOVED
1728 feraiseexcept                   NEW: ISO C 9x
1729 ferror_locked                   REMOVED
1730 fesetenv                        NEW: ISO C 9x
1731 fesetexceptflag                 NEW: ISO C 9x
1732 fesetround                      NEW: ISO C 9x
1733 fetestexcept                    NEW: ISO C 9x
1734 feupdateenv                     NEW: ISO C 9x
1735 fflush_locked                   REMOVED
1736 ffsl                            NEW: GNU ext.
1737 ffsll                           NEW: GNU ext.
1738 fgetpos64                       NEW: LFS
1739 fgets_unlocked                  NEW: GNU ext.
1740 fileno_locked                   REMOVED
1741 fma                             NEW: ISO C 9x
1742 fmaf                            NEW: ISO C 9x
1743 fmal                            NEW: ISO C 9x
1744 fmax                            NEW: ISO C 9x
1745 fmaxf                           NEW: ISO C 9x
1746 fmaxl                           NEW: ISO C 9x
1747 fmin                            NEW: ISO C 9x
1748 fminf                           NEW: ISO C 9x
1749 fminl                           NEW: ISO C 9x
1750 fmtmsg                          NEW: Unix98
1751 fopen64                         NEW: LFS
1752 fputc_locked                    REMOVED
1753 fputs_unlocked                  NEW: GNU ext.
1754 fread_unlocked                  NEW: GNU ext.
1755 freopen64                       NEW: LFS
1756 fseeko                          NEW: Unix98
1757 fsetpos64                       NEW: LFS
1758 fstatfs64                       NEW: LFS
1759 fstatvfs                        NEW: Unix98
1760 fstatvfs64                      NEW: LFS
1761 ftello                          NEW: Unix98
1762 ftello64                        NEW: LFS
1763 ftruncate64                     NEW: LFS
1764 ftw64                           NEW: LFS
1765 fwrite_unlocked                 NEW: GNU ext.
1766 gai_strerror                    NEW: IPv6
1767 gamma_r                         REMOVED
1768 gammaf_r                        REMOVED
1769 gammal_r                        REMOVED
1770 getchar_locked                  REMOVED
1771 getdate                         NEW: Unix98
1772 getdate_err                     NEW: Unix98
1773 getdate_r                       NEW: GNU ext.
1774 getmsg                          NEW: STREAMS
1775 getnameinfo                     NEW: IPv6
1776 getnetname                      NEW: Secure RPC
1777 getpmsg                         NEW: STREAMS
1778 getpt                           NEW: Unix98 PTY
1779 getrlimit64                     NEW: LFS
1780 getutxent                       NEW: Unix98
1781 getutxid                        NEW: Unix98
1782 getutxline                      NEW: Unix98
1783 glob64                          NEW: GNU ext.
1784 globfree64                      NEW: GNU ext.
1785 gnu_get_libc_release            NEW: GNU ext.
1786 gnu_get_libc_version            NEW: GNU ext.
1787 grantpt                         NEW: Unix98 PTY
1788 host2netname                    NEW: Secure RPC
1789 iconv                           NEW: iconv
1790 iconv_close                     NEW: iconv
1791 iconv_open                      NEW: iconv
1792 if_freenameindex                NEW: IPv6
1793 if_indextoname                  NEW: IPv6
1794 if_nameindex                    NEW: IPv6
1795 if_nametoindex                  NEW: IPv6
1796 in6addr_any                     NEW: IPv6
1797 in6addr_loopback                NEW: IPv6
1798 inet6_isipv4mapped              NEW: IPv6
1799 isastream                       NEW: STREAMS
1800 iswblank                        NEW: GNU ext.
1801 key_decryptsession              NEW: Secure RPC
1802 key_decryptsession_pk           NEW: Secure RPC
1803 key_encryptsession              NEW: Secure RPC
1804 key_encryptsession_pk           NEW: Secure RPC
1805 key_gendes                      NEW: Secure RPC
1806 key_get_conv                    NEW: Secure RPC
1807 key_secretkey_is_set            NEW: Secure RPC
1808 key_setnet                      NEW: Secure RPC
1809 key_setsecret                   NEW: Secure RPC
1810 llrint                          NEW: ISO C 9x
1811 llrintf                         NEW: ISO C 9x
1812 llrintl                         NEW: ISO C 9x
1813 llround                         NEW: ISO C 9x
1814 llroundf                        NEW: ISO C 9x
1815 llroundl                        NEW: ISO C 9x
1816 log2                            NEW: ISO C 9x
1817 log2f                           NEW: ISO C 9x
1818 log2l                           NEW: ISO C 9x
1819 lrint                           NEW: ISO C 9x
1820 lrintf                          NEW: ISO C 9x
1821 lrintl                          NEW: ISO C 9x
1822 lround                          NEW: ISO C 9x
1823 lroundf                         NEW: ISO C 9x
1824 lroundl                         NEW: ISO C 9x
1825 lseek64                         NEW: LFS
1826 makecontext                     NEW: Unix98
1827 mempcpy                         NEW: GNU ext.
1828 mmap64                          NEW: LFS
1829 moncontrol                      REMOVED
1830 modify_ldt                      NEW: kernel
1831 nan                             NEW: ISO C 9x
1832 nanf                            NEW: ISO C 9x
1833 nanl                            NEW: ISO C 9x
1834 nearbyint                       NEW: ISO C 9x
1835 nearbyintf                      NEW: ISO C 9x
1836 nearbyintl                      NEW: ISO C 9x
1837 netname2host                    NEW: Secure RPC
1838 netname2user                    NEW: Secure RPC
1839 nexttoward                      NEW: ISO C 9x
1840 nexttowardf                     NEW: ISO C 9x
1841 nexttowardl                     NEW: ISO C 9x
1842 nftw                            NEW: Unix98
1843 nftw64                          NEW: LFS
1844 open64                          NEW: LFS
1845 passwd2des                      NEW: Secure RPC
1846 pow10                           NEW: GNU ext.
1847 pow10f                          NEW: GNU ext.
1848 pow10l                          NEW: GNU ext.
1849 pread                           NEW: Unix98
1850 pread64                         NEW: LFS
1851 printf_size                     NEW: GNU ext.
1852 printf_size_info                NEW: GNU ext.
1853 profil_counter                  REMOVED
1854 pthread_mutexattr_getkind_np    REPLACED
1855 pthread_mutexattr_setkind_np    REPLACED
1856 ptsname                         NEW: Unix98 PTY
1857 ptsname_r                       NEW: Unix98 PTY
1858 putc_locked                     REMOVED
1859 putchar_locked                  REMOVED
1860 putgrent                        NEW: GNU ext.
1861 putmsg                          NEW: STREAMS
1862 putpmsg                         NEW: STREAMS
1863 pututxline                      NEW: Unix98
1864 pwrite                          NEW: Unix98
1865 pwrite64                        NEW: LFS
1866 readdir64                       NEW: LFS
1867 readdir64_r                     NEW: LFS
1868 remquo                          NEW: ISO C 9x
1869 remquof                         NEW: ISO C 9x
1870 remquol                         NEW: ISO C 9x
1871 round                           NEW: ISO C 9x
1872 roundf                          NEW: ISO C 9x
1873 roundl                          NEW: ISO C 9x
1874 rtime                           NEW: GNU ext.
1875 scalbln                         NEW: ISO C 9x
1876 scalblnf                        NEW: ISO C 9x
1877 scalblnl                        NEW: ISO C 9x
1878 scandir64                       NEW: LFS
1879 sendfile                        NEW: kernel
1880 setcontext                      NEW: Unix98
1881 setrlimit64                     NEW: LFS
1882 setutxent                       NEW: Unix98
1883 sighold                         NEW: Unix98
1884 sigignore                       NEW: Unix98
1885 sigqueue                        NEW: POSIX.1b
1886 sigrelse                        NEW: Unix98
1887 sigset                          NEW: POSIX.1b
1888 sigtimedwait                    NEW: POSIX.1b
1889 sigwaitinfo                     NEW: POSIX.1b
1890 sincos                          NEW: GNU ext.
1891 sincosf                         NEW: GNU ext.
1892 sincosl                         NEW: GNU ext.
1893 statfs64                        NEW: LFS
1894 statvfs                         NEW: Unix98
1895 statvfs64                       NEW: LFS
1896 strcasestr                      NEW: GNU ext.
1897 strtoimax                       NEW: ISO C 9x
1898 strtoumax                       NEW: ISO C 9x
1899 strverscmp                      NEW: GNU ext.
1900 svcauthdes_stats                NEW: Secure RPC
1901 svcunix_create                  NEW: sunrpc etx
1902 svcunixfd_create                NEW: sunrpc ext
1903 swapcontext                     NEW: Unix98
1904 tcgetsid                        NEW: Unix98 PTY
1905 tdestroy                        NEW: GNU ext.
1906 tgamma                          NEW: ISO C 9x
1907 tgammaf                         NEW: ISO C 9x
1908 tgammal                         NEW: ISO C 9x
1909 tmpfile64                       NEW: LFS
1910 trunc                           NEW: ISO C 9x
1911 truncate64                      NEW: LFS
1912 truncf                          NEW: ISO C 9x
1913 truncl                          NEW: ISO C 9x
1914 umount2                         NEW: kernel
1915 unlockpt                        NEW: Unix98 PTY
1916 updwtmpx                        NEW: Unix98
1917 user2netname                    NEW: Secure RPC
1918 utmpxname                       NEW: Unix98
1919 versionsort                     NEW: GNU ext.
1920 versionsort64                   NEW: GNU ext.
1921 waitid                          NEW: Unix98
1922 wcscasecmp                      NEW: GNU ext.
1923 wcsncasecmp                     NEW: GNU ext.
1924 wcsnlen                         NEW: GNU ext.
1925 wcstoimax                       NEW: ISO C 9x
1926 wcstoll                         NEW: ISO C 9x
1927 wcstoull                        NEW: ISO C 9x
1928 wcstoumax                       NEW: ISO C 9x
1929 wcswcs                          NEW: Unix98
1930 wordexp                         NEW: POSIX.2
1931 wordfree                        NEW: POSIX.2
1932 write_profiling                 REMOVED
1933 xdecrypt                        NEW: Secure RPC
1934 xdr_authdes_cred                NEW: Secure RPC
1935 xdr_authdes_verf                NEW: Secure RPC
1936 xdr_cryptkeyarg                 NEW: Secure RPC
1937 xdr_cryptkeyarg2                NEW: Secure RPC
1938 xdr_cryptkeyres                 NEW: Secure RPC
1939 xdr_getcredres                  NEW: Secure RPC
1940 xdr_key_netstarg                NEW: Secure RPC
1941 xdr_key_netstres                NEW: Secure RPC
1942 xdr_keybuf                      NEW: Secure RPC
1943 xdr_keystatus                   NEW: Secure RPC
1944 xdr_netnamestr                  NEW: Secure RPC
1945 xdr_sizeof                      NEW: Secure RPC
1946 xdr_unixcred                    NEW: sunrpc ext
1947 xencrypt                        NEW: Secure RPC
1948 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1949 \f
1950 Version 2.0.6
1951
1952 * more bug fixes
1953
1954 \f
1955 Version 2.0.5
1956
1957 * more bug fixes
1958
1959 * inet_ntoa is thread-safe
1960
1961 * updwtmp is moved from libutil to libc
1962
1963 * rewrite of cbrt function
1964
1965 * update of timezone data
1966 \f
1967 Version 2.0.4
1968
1969 * more bug fixes
1970 \f
1971 Version 2.0.3
1972
1973 * more bug fixes
1974 \f
1975 Version 2.0.2
1976
1977 * more bug fixes
1978
1979 * add atoll function
1980
1981 * fix complex problems in Berkeley DB code
1982
1983 * fix math functions
1984 \f
1985 Version 2.0.1
1986
1987 * fixed lots of header problems (especially Linux/GNU specific)
1988
1989 * dynamic loader preserves all registers
1990
1991 * Roland McGrath provided support for handling of auxiliary objects in
1992   the ELF dynamic loader.
1993
1994 * support for parallel builds is improved
1995 \f
1996 Version 2.0
1997
1998 * GNU extensions are no longer declared by default.  To enable them you
1999   must define the macro `_GNU_SOURCE' in your program or compile with
2000   `-D_GNU_SOURCE'.
2001
2002 * The library has changed from using GNU ld symbol aliases to using weak
2003   symbols where available.  The ELF object file format supports weak
2004   symbols; GNU ld also supports weak symbols in the a.out format.  (There
2005   is also now support for other GNU ld extensions in ELF.  Use the
2006   `--with-elf' option to configure to indicate you have ELF, and
2007   `--with-gnu-ld' if using GNU ld.)  This change resulted in the deletion
2008   of many files which contained only symbol aliases, reducing the size of
2009   the source and the compiled library; many other files were renamed to
2010   less cryptic names previously occupied by the symbol alias files.
2011   There is a new header file <elf.h> for programs which operate on
2012   files in the ELF format.
2013
2014 * Converted to Autoconf version 2, so `configure' has more options.
2015   Run `configure --help' to see the details.
2016
2017 * The library can now be configured to build profiling, highly-optimized
2018   (but undebuggable), and/or shared libraries (ELF with GNU ld only).  The
2019   `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2020   `configure' enable building these extra libraries.  The shared library is
2021   built by default when using both ELF and GNU ld.  When shared libraries
2022   are enabled, the new library `-ldl' is available for arbitrary run-time
2023   loading of shared objects; its interface is defined in <dlfcn.h>.  The
2024   new header file <link.h> gives access to the internals of the run-time
2025   dynamic linker, `ld.so'.  The shell script `ldd' is similar to the
2026   application of same name on other systems and it provides information
2027   about dynamically linked binaries.
2028
2029 * The C library now provides the run-time support code for profiling
2030   executables compiled with `-pg'.  Programs can control the profiling code
2031   through the interface in <sys/gmon.h>.  The `gmon.out' files written by
2032   the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2033   the support for this file format was contributed by David Mosberger-Tang.
2034
2035 * The math code has been replaced with a math library based on fdlibm from
2036   Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2037   Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2038   functions.  The math functions now reside in a separate library,  so
2039   programs using them will need to use `-lm' their linking commands.
2040
2041 * John C. Bowman contributed optimized ix87 assembler inline functions.
2042
2043 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2044   mechanism similar to that found in Solaris 2.  This is now used for the
2045   group, passwd, hosts, networks, services, protocols, rpc, ethers,
2046   shadow, netgroup, publickey, and alias databases.  The `nsswitch.conf'
2047   file controls what services are used for each individual database.  This
2048   works by loading shared libraries with names specified in `nsswitch.conf',
2049   so service modules can be changed or added at any time without even
2050   relinking any program.  Currently there are the file, db, and NIS based
2051   NSS services available.
2052
2053 * The new functions `strtoq' and `strtouq' parse integer values from
2054   strings, like `strtol' and `strtoul', but they return `long long int' and
2055   `unsigned long long int' values, respectively (64-bit quantities).
2056
2057 * The new functions `strtof' and `strtold' parse floating-point values from
2058   strings, like `strtod', but they return `float' and `long double' values,
2059   respectively (on some machines `double' and `long double' are the same).
2060
2061 * Ulrich Drepper has contributed new implementations of the floating-point
2062   printing and reading code used in the `printf' family of functions and
2063   `strtod', `strtof', and `strtold'.  These new functions are perfectly
2064   accurate, and much faster than the old ones.
2065
2066 * The implementation of the POSIX locale model was completely rewritten by
2067   Ulrich Drepper.  This includes the new programs `localedef' and `locale'
2068   to compile the POSIX locale definition.
2069
2070 * The former dummy implementations of the strcoll and strxfrm function are
2071   now replaced by fully functional code contributed by Ulrich Drepper.  The
2072   collation information comes from the POSIX locale definitions.
2073
2074 * The new header <langinfo.h> defines an interface for accessing
2075   various locale-dependent data (using the locale chosen with `setlocale').
2076
2077 * Ulrich Drepper has contributed a new suite of functions for operation on
2078   wide-character and multibyte-character strings, in <wchar.h>;
2079   and classification and case conversion of wide characters, in <wctype.h>.
2080   These new functions are conforming to the ISO C, Amendement 1 specification.
2081
2082 * There is now a second implementation of the standard I/O library available.
2083   It comes from GNU libg++ as was written by Per Bothner, heavily modified
2084   by Hongjiu Lu and made thread safe by Ulrich Drepper.
2085
2086 * You can now use positional parameter specifications in format strings
2087   for the `printf' and `scanf' families of functions.  For example,
2088   `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2089   ``Number 6, Mr Jones''.  This is mainly useful when providing different
2090   format strings for different languages, whose grammars may dictate
2091   different orderings of the values being printed.  To support this
2092   feature, the interface for `register_printf_handler' has changed; see
2093   the header file <printf.h> for details.
2094
2095 * The `printf' and `scanf' families of functions now understand a new
2096   formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2097   to group numbers as indicated by the locale; for `scanf' and friends, this
2098   says to accept as valid only a number with all the proper grouping
2099   separators in the right places.  In the default "C" locale, numbers are
2100   not grouped; but locales for specific countries will define the usual
2101   conventions (i.e. separate thousands with `,' in the US locale).
2102
2103 * The pgrp functions have been regularized, slightly incompatibly but much
2104   less confusingly.  The core functions are now `getpgid' and `setpgid',
2105   which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2106   argument) and BSD `setpgrp' (identical to `setpgid') functions are
2107   provided for compatibility.  There is no longer an incompatible `getpgrp'
2108   with an argument declared under _BSD_SOURCE; no BSD code uses it.
2109
2110 * The new header file <fts.h> and suite of functions simplify programs that
2111   operate on directory trees.  This code comes from 4.4 BSD.
2112
2113 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2114   Parts of the code were heavily modified by Ulrich Drepper to fit in the
2115   NSS scheme used in glibc.
2116
2117 * There is a new malloc debugging hook `__memalign_hook'.
2118
2119 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2120   `unsigned int' in <sys/types.h>.  These are for compatibility only and
2121   their use is discouraged.
2122
2123 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2124   done differently, so that it works even without GNU ld.
2125
2126 * New function `euidaccess' checks allowed access to a file like `access',
2127   but using the effective IDs instead of the real IDs.
2128
2129 * The time zone data files have been updated for the latest and greatest
2130   local time conventions of the countries of the world.
2131
2132 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2133   see <dirent.h>.
2134
2135 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2136   for formatting floating-point numbers.  They are provided only for
2137   compatibility; new programs should use `sprintf' instead.  There are
2138   also equivalent function for the `long double' floating-point type and
2139   all functions also exist in a reentrant form.
2140
2141 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2142   functions for maintaining the login-record files (primarily of use to
2143   system programs such as `login'), and convenient functions for
2144   allocating and initializing a pseudo-terminal (pty) device.
2145
2146 * Ulrich Drepper has contributed new support for System V style
2147   shared memory and IPC on systems that support it.
2148
2149 * Ulrich Drepper has contributed several miscellaneous new functions found
2150   in System V: The `hsearch' family of functions provide an effective
2151   implementation of hash tables; `a64l' and `l64a' provide a very simple
2152   binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2153   number generator.
2154
2155 * Ulrich Drepper has contributed new reentrant counterparts for the
2156   `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2157
2158 * Ulrich Drepper has contributed new, highly-optimized versions of several
2159   string functions for the i486/Pentium family of processors.
2160
2161 * Ulrich Drepper has updated the Linux-specific code, based largely
2162   on work done in Hongjiu Lu's version of GNU libc for Linux.
2163   The GNU library now supports Linux versions 2.0.10 and later,
2164   using the ELF object file format (i[3456]86-*-linux).
2165
2166 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2167
2168 * David Mosberger-Tang and Richard Henderson have ported the C library
2169   to Linux/Alpha (alpha-*-linux).  Richard Henderson contributed the
2170   dynamic linking support for ELF/Alpha.
2171
2172 * Richard Henderson contributed several Alpha optimized assembler function
2173   for arithmetic and string handling.
2174
2175 * Ulrich Drepper has contributed a new set of message catalog functions to
2176   support multiple languages using the <libintl.h> interface, for use with
2177   his new package GNU gettext.  Translation volunteers have contributed
2178   catalogs of the library's messages in Spanish, German, and Korean.
2179
2180 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2181   program and the `catgets' function for reading the catalog files it
2182   creates.  (The <libintl.h> interface is preferred; we include the
2183   <nl_types.h> interface using `catgets' only for source compatibility with
2184   programs already written to use it.)
2185
2186 * New header file <values.h> gives SVID-compatible names for <limits.h>
2187   constants.
2188
2189 * Various new macros, declarations, and small header files for compatibility
2190   with 4.4 BSD.
2191
2192 * New function `group_member' is a convenient way to check if a process has
2193   a given effective group ID.
2194
2195 * When using GCC 2.7 and later, the socket functions are now declared in a
2196   special way so that passing an argument of type `struct sockaddr_in *',
2197   `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2198   `struct sockaddr *' type, does not generate a type-clash warning.
2199
2200 * New function `error' declared in header file <error.h> is a convenient
2201   function for printing error messages and optionally exiting; this is the
2202   canonical function used in GNU programs.  The new functions `err', `warn',
2203   and friends in header file <err.h> are the canonical 4.4 BSD interface for
2204   doing the same thing.
2205
2206 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2207   POSIX.2 `glob' function to do ~ and {...} expansion.
2208
2209 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2210   `clearenv' which is used in POSIX.9 is also available.
2211
2212 * New function `getsid' returns session ID number on systems that support it.
2213
2214 * We have incorporated the 4.4 BSD `db' library (version 1.85).  New header
2215   files <db.h> and <mpool.h> provide a rich set of functions for several
2216   types of simple databases stored in memory and in files, and <ndbm.h> is
2217   an old `ndbm'-compatible interface using the `db' functions.  Link with
2218   `-ldb' to get these functions.
2219
2220 * New macro `strdupa' copies a string like `strdup', but uses local stack
2221   space from `alloca' instead of dynamic heap space from `malloc'.
2222
2223 * New function `strnlen' is like `strlen' but searches only a given maximum
2224   number of characters for the null terminator.  `stpncpy', `strndup' and
2225   `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2226   function.
2227
2228 * New function `statfs' in header <sys/statfs.h>.
2229
2230 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2231   provide convenient functions for operating on blocks of null-terminated
2232   strings.
2233
2234 * A new suite of functions in <utmp.h> handle all the details of reading
2235   and writing the utmp file.
2236
2237 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2238   Thorsten Kukuk.
2239
2240 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2241   completely POSIX compliant and also implemented the extended functionality
2242   to handle alternate digit representation and alternate era date formats.
2243
2244 * Ulrich Drepper provided an implementation of the `strptime' function
2245   defined in XPG4.2 which transforms a string into a `struct tm' value.
2246
2247 * Paul Eggert provided the tzselect shell script as part of the timezone
2248   code.  The shell script makes it easy to select the correct timezone
2249   specification.
2250
2251 * The implementation of the malloc family of functions is completely replaced
2252   by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2253   The implementation uses the mmap function (if available) and it is
2254   optimized for the use in multi threaded programs.
2255
2256 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2257   functions.  This new functionality is usable by specifying a special
2258   salt string and it is compatible with implementation on *BSD systems.
2259
2260 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2261   `getsubopt' to handle second level command line options, `bsd_signal'
2262   to access BSD style `signal' functionality, the obsolete `regexp' style
2263   expression matcher.
2264
2265 * the `lchown' function is available on system which support this
2266   functionality.
2267
2268 * The implementation of the shadow password handling function was contributed
2269   by Ulrich Drepper.
2270
2271 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2272
2273 * POSIX.1g support was added.  The <sys/select.h> header is available,
2274   `isfdtype' and `pselect' are implemented.  Craig Metz contributed an
2275   implementation of `getaddrinfo'.
2276 \f
2277 Version 1.09
2278
2279 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2280
2281 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2282   friends, for parsing /etc/fstab.  This code comes from 4.4 BSD.
2283
2284 * The new function `daemon' from 4.4 BSD is useful for server programs that
2285   want to put themselves in the background.
2286
2287 * Joel Sherrill has contributed support for several standalone boards that
2288   run without an operating system.
2289
2290 * `printf', `scanf' and friends now accept a `q' type modifier for long
2291   long int as well as `ll'.  Formats using these might be `%qu' or `%lld'.
2292
2293 * All of the code taken from BSD (notably most of the math and networking
2294   routines) has been updated from the BSD 4.4-Lite release.
2295
2296 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2297
2298 * The new functions `getdomainname' and `setdomainname' fetch or change the
2299   YP/NIS domain name.  These are system calls which exist on systems which
2300   have YP (aka NIS).
2301
2302 * The time zone data files have been updated for the latest international
2303   conventions.
2304
2305 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2306   $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2307 \f
2308 Version 1.08
2309
2310 * The C library now includes support for Sun RPC, from Sun's free
2311   RPCSRC-4.0 distribution.  The `portmap', `rpcinfo', and `rpcgen' programs
2312   are included.  (There is still no support for YP.)
2313
2314 * Tom Quinn has contributed a port of the C library to SGI machines running
2315   Irix 4 (mips-sgi-irix4).
2316
2317 * The new `lockf' function is a simplified interface to the locking
2318   facilities of `fcntl', included for compatibility.
2319
2320 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2321
2322 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2323
2324 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2325   compatibility.
2326
2327 * The error message printed by `assert' for a failed assertion now includes
2328   the name of the program (if using GNU ld) and the name of the calling
2329   function (with versions of GCC that support this).
2330
2331 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2332
2333 * The library now includes the <sys/mman.h> header file and memory
2334   management functions `mmap', `munmap', `mprotect', `msync', and
2335   `madvise', on systems that support those facilities.
2336
2337 * The interface for `mcheck' has changed slightly: the function called to
2338   abort the program when an allocation inconsistency is detected now takes
2339   an argument that indicates the type of failure.  The new function
2340   `mprobe' lets you request a consistency check for a particular block at
2341   any time (checks are normally done only when you call `free' or `realloc'
2342   on a block).
2343
2344 * It is now possible to easily cross-compile the C library, building on one
2345   system a library to run on another machine and/or operating system.  All
2346   you need to do is set the variable `HOST_CC' in `configparms' to the
2347   native compiler for programs to run on the machine you are building on (a
2348   few generator programs are used on Unix systems); set `CC' to the
2349   cross-compiler.
2350
2351 * The new function `fexecve' (only implemented on the GNU system) executes
2352   a program file given a file descriptor already open on the file.
2353 \f
2354 Version 1.07
2355
2356 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2357   running OSF/1 (alpha-dec-osf1).  He says it is 75% complete.
2358
2359 * You can set the variable `libprefix' in `configparms' to specify a prefix
2360   to be prepended to installed library files; this makes it easy to install
2361   the GNU C library to be linked as `-lgnuc' or whatever.
2362
2363 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2364   copies a limited number of characters from a string, and returns the
2365   address of the last character written.
2366
2367 * You no longer need to check for whether the installed `stddef.h' is
2368   compatible with the GNU C library.  configure now checks for you.
2369
2370 * You can now define a per-stream `fileno' function to convert the
2371   stream's cookie into an integral file descriptor.
2372
2373 * ``malloc (0)'' no longer returns a null pointer.  Instead, it
2374   allocates zero bytes of storage, and returns a unique pointer which
2375   you can pass to `realloc' or `free'.  The behavior is undefined if
2376   you dereference this pointer.
2377
2378 * The C library now runs on Sony NEWS m68k machines running either
2379   NewsOS 3 or NewsOS 4.
2380
2381 * The new `syscall' function is a system-dependent primitive function
2382   for invoking system calls.  It has the canonical behavior on Unix
2383   systems, including unreliable return values for some calls (such as
2384   `pipe', `fork' and `getppid').
2385
2386 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2387   to `EAGAIN', which is the preferred name.  On systems whose kernels
2388   use two distinct codes, the C library now translates EWOULDBLOCK to
2389   EAGAIN in every system call function.
2390 \f
2391 Version 1.06
2392
2393 * The GNU C Library Reference Manual is now distributed with the library.
2394   `make dvi' will produce a DVI file of the printed manual.
2395   `make info' will produce Info files that you can read on line using C-h i
2396   in Emacs or the `info' program.
2397   Please send comments on the manual to bug-glibc-manual@gnu.org.
2398
2399 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2400
2401 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2402
2403 * Jason Merrill has contributed a port to the Sequent Symmetry running
2404   Dynix version 3 (i386-sequent-dynix).
2405
2406 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2407   ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2408
2409 * New function `memory_warnings' lets you arrange to get warnings when
2410   malloc is running out of memory to allocate, like Emacs gives you.
2411
2412 * The C library now contains the relocating allocator used in Emacs 19 for
2413   its editing buffers.  This allocator (ralloc) minimizes allocation
2414   overhead and fragmentation by moving allocated regions around whenever it
2415   needs to.  You always refer to a ralloc'd region with a "handle" (a
2416   pointer to a pointer--an object of type `void **').
2417
2418 * There is a new `printf' format: `%m' gives you the string corresponding
2419   to the error code in `errno'.
2420
2421 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2422   or `%[' conversion, but instead of filling in a fixed-sized buffer you
2423   pass, the `a' modifier says to fill in a `char **' you pass with a
2424   malloc'd string.
2425
2426 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2427   `FNM_CASEFOLD'.  `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2428   name like `foo/bar'.  `FNM_CASEFOLD' says to ignore case in matching.
2429
2430 * `mkstemp' is a traditional Unix function to atomically create and open a
2431   uniquely-named temporary file.
2432 \f
2433 Version 1.05
2434
2435 * The standard location for the file that says what the local timezone is
2436   has changed again.  It is now `/usr/local/etc/localtime' (or more
2437   precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2438
2439 * The distribution no longer contains any files with names longer than 14
2440   characters.
2441
2442 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2443   These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2444
2445 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2446 \f
2447 Version 1.04
2448
2449 * The configuration process has changed quite a bit.  The `configure'
2450   script is now used just like the configuration scripts for other GNU
2451   packages.  The `sysdeps' directory hierarchy is much rearranged.
2452   The file `INSTALL' explains the new scheme in detail.
2453
2454 * The header files no longer need to be processed into ANSI C and
2455   traditional C versions.  There is just one set of files to install, and
2456   it will work with ANSI or old C compilers (including `gcc -traditional').
2457
2458 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2459   MIPS DECStation running Ultrix 4.
2460
2461 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2462   Tom Quinn contributed the initial code.  The GNU C library can NOT yet be
2463   made itself into a shared library.
2464
2465 * Yet further improved support for the i386, running 4.3 BSD-like systems
2466   (such as Mach 3 with the Unix single-server), or System V.
2467
2468 * New function `strncasecmp' to do case-insensitive string comparison
2469   with limited length.
2470
2471 * New function `strsep' is a reentrant alternative to `strtok'.
2472
2473 * New functions `scandir' and `alphasort' for searching directories.
2474
2475 * New function `setenv' is a better interface to `putenv'.
2476
2477 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2478   function for traversing a directory tree.
2479
2480 * The GNU obstack package is now also part of the C library.
2481   The new function `open_obstack_stream' creates a stdio stream that
2482   writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2483   formatted output directly to an obstack.
2484
2485 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2486   cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2487
2488 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2489
2490 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2491   things to your strings.
2492
2493 * There are some new test programs: test-fseek, testmb, and testrand.
2494
2495 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2496   These ports are not finished, but are a good starting place for really
2497   supporting those systems.
2498
2499 * `/etc/localtime' is now the standard location for the file that says what
2500   the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2501   This follows the general principle that `/etc' is the place for all local
2502   configuration files.
2503
2504 * The C library header files now use `extern "C"' when used by the C++
2505   compiler, so the C library should now work with C++ code.
2506
2507 * The header file <bstring.h> is gone.  <string.h> now declares bcopy,
2508   bcmp, bzero, and ffs.  (Update: nowadays these functions are declared
2509   in <strings.h>.)
2510
2511 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2512   function which uses the `merge sort' algorithm, and is said to be
2513   significantly faster than the old GNU `qsort' function.  Merge sort is
2514   now the standard `qsort' function.  The new algorithm can require a lot
2515   of temporary storage; so, the old sorting function is called when the
2516   required storage is not available.
2517
2518 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2519   provides the Unix `crypt' function, plus some other entry points.
2520
2521 * The code and header files taken from 4.4 BSD have been updated with the
2522   latest files released from Berkeley.
2523 \f
2524 ----------------------------------------------------------------------
2525 Copyright information:
2526
2527 Copyright (C) 1992-2014 Free Software Foundation, Inc.
2528
2529    Permission is granted to anyone to make or distribute verbatim copies
2530    of this document as received, in any medium, provided that the
2531    copyright notice and this permission notice are preserved,
2532    thus giving the recipient permission to redistribute in turn.
2533
2534    Permission is granted to distribute modified versions
2535    of this document, or of portions of it,
2536    under the above conditions, provided also that they
2537    carry prominent notices stating who last changed them.
2538 \f
2539 Local variables:
2540 version-control: never
2541 fill-column: 76
2542 End: