NEWS

   1 GNU C Library NEWS -- history of user-visible changes.  2006-07-28
   2 Copyright (C) 1992-2002,2003,2004,2005,2006 Free Software Foundation, Inc.
   3 See the end for copying conditions.
   4
   5 Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
   6 using `glibc' in the "product" field.
   7 \f
   8 Version 2.5
   9
  10 * For Linux, the sorting of addresses returned by getaddrinfo now also
  11   handles rules 3 and 7 from RFC 3484.  Implemented by Ulrich Drepper.
  12
  13 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
  14   Implemented by Ulrich Drepper.
  15
  16 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
  17
  18 * New iconv module for MIK.  Contributed by Alexander Shopov.
  19
  20 * For sites with broken group and/or passwd database, the auto-propagate
  21   option of nscd can prevent creating ID lookup entries from the results
  22   of a name lookup and vice versa.   This usually is no problem but some
  23   site might have problems with default behavior.
  24   Implemented by Ulrich Drepper.
  25
  26 * Iterating over entire database in NIS can be slow.  With the
  27   SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
  28   to trade time for memory.  The entire database will be read at once.
  29   Implemented by Ulrich Drepper.
  30
  31 * The interfaces introduced in RFC 3542 have been implemented by
  32   Ulrich Drepper.
  33
  34 * Support for the new ELF hash table format was added by Ulrich Drepper.
  35
  36 * Support for priority inheritance mutexes added by Jakub Jelinek and
  37   Ulrich Drepper.
  38
  39 \f
  40 Version 2.4
  41
  42 * More overflow detection functions.
  43
  44 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
  45   IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
  46
  47   More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
  48   IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
  49   IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
  50   IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
  51   IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
  52   by Masahide Washizawa.
  53
  54 * It is now possible to install audit libraries for the dynamic linker using
  55   LD_AUDIT.  Implemented by Ulrich Drepper.
  56
  57 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
  58   longer supported.  The new NPTL implementation requires Linux 2.6 kernels.
  59   For a libc and libpthread that works well on Linux 2.4 kernels, we
  60   recommend using the stable 2.3 branch.
  61
  62 * The new function open_wmemstream acts like open_memstream,
  63   but uses a wchar_t wide character buffer.
  64
  65 * The new function ppoll is an improved version of poll, similar to pselect.
  66
  67 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
  68   futimesat, faccessat, mkdirat, mkfifoat, mknodat,
  69   renameat, unlinkat, linkat, symlinkat, readlinkat.
  70
  71 * New Linux kernel system calls: unshare,
  72   inotify_init, inotify_add_watch, inotify_rm_watch.
  73
  74 * The euidaccess function is now also known by the alias eaccess,
  75   for compatibility with some other systems.
  76
  77 * Timezone data updated to 2006b version.
  78 \f
  79 Version 2.3.6
  80
  81 * The following bugs are resolved with this release:
  82
  83   38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
  84   1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
  85   1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
  86   1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
  87   1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
  88   1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
  89
  90   Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
  91
  92 * As of this release, GCC 4 can be used to compile the C Library.
  93
  94 * Timezone data updated to 2005m version.
  95 \f
  96 Version 2.3.5
  97
  98 * The following bugs are resolved with this release:
  99
 100   284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
 101   722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
 102   737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
 103   777, 787, 821, 822, 823, 825
 104
 105   Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
 106 \f
 107 Version 2.3.4
 108
 109 * Support for RFC 3678.  Real implementations exist only for Linux so far.
 110   Implemented by Ulrich Drepper.
 111
 112 * nscd can now cache entries persistently.  Expiring entries are reloaded.
 113   For speedups the cache can be shared in memory with client processes.
 114   Implemented by Ulrich Drepper.
 115
 116 * nscd can now perform SELinux checks.
 117   Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
 118
 119 * getaddrinfo queries are now cached.  Canonical name lookup is performed
 120   efficiently.
 121   Implemented by Ulrich Drepper.
 122
 123 * The nothrow function attribute is used when headers are used by gcc when
 124   compiling C code.  This can avoid significant amounts of exception
 125   handling data.
 126
 127 * The malloc functions perform more error checking and are stricter when
 128   it comes to reacting on errors.  The default action is to terminate
 129   the process after showing an error message.  Implemented by Ulrich Drepper.
 130
 131 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
 132   lookups anymore unless explicitly requested.  Implemented by Ulrich Drepper.
 133
 134 * Namespaces in ld.so are implemented.  DSOs can be loaded in separate
 135   namespaces using the new function dlmopen().  This feature is of course,
 136   like most other dynamic loading functionality, not available in statically
 137   linked applications.  Implemented by Ulrich Drepper.
 138
 139 * Low-overhead boundary checking variants of string and some stdio functions
 140   were added.  These are to be used in conjunction with a gcc patch by
 141   Jakub Jelinek which adds calls to these functions if possible.
 142   Implemented by Jakub Jelinek and Ulrich Drepper.
 143
 144 * Old code for several operating systems and machine architectures that
 145   have not been in working condition in a long time have been removed from
 146   the main source tree maintained by the GNU C Library's maintainers.
 147   These files are now reside in the separate `ports' source module
 148   that is usable as an add-on when building the library.
 149 \f
 150 Version 2.3.3
 151
 152 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
 153   interrogate the dynamic linker, compatible with the Solaris interface.
 154
 155 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
 156   implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
 157
 158 * getifaddrs now uses the netlink interface on Linux to get its information.
 159   Implemented by Thorsten Kukuk.
 160
 161 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
 162   Implemented by Ulrich Drepper.
 163
 164 * support for non-executable stacks on x86 has been added.  Changes mostly
 165   by Roland McGrath.
 166
 167 * regex is now much faster for multibyte locales.  Changes by Jakub Jelinek
 168   and Ulrich Drepper.
 169
 170 * getaddrinfo now performs destination address selection according to
 171   RFC 3484.
 172 \f
 173 Version 2.3.2
 174
 175 * Thread-safe interfaces for many functions that access locale data
 176   were added in version 2.3, but these features were omitted from NEWS.
 177   Many functions have variants with an `_l' suffix that take a `locale_t'
 178   object as a parameter rather than consulting the current locale.
 179   The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
 180   create and maintain `locale_t' objects.  Additionally, the new function
 181   `uselocale' sets "the current locale" (as used by functions not so
 182   parameterized) set for an individual thread.  These features were added
 183   in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
 184
 185 * The functions getresuid, getresgid, setresuid, and setresgid, which
 186   have long been available on Linux, are now declared in <unistd.h>
 187   and are now also available on the Hurd.
 188
 189 * ELF thread-local storage support (TLS) now works on x86-64.
 190
 191 * The new dynamic string token $LIB is expanded in shared library names.
 192   This normally expands to lib, but on some 64-bit platforms to lib64 instead.
 193
 194 * Aldy Hernandez contributed complete software floating point support for
 195   PowerPC machines with no FPU.
 196
 197 * fexecve is implemented on Linux.
 198
 199 * The `btowc' function should work at least twice as fast due to
 200   specialized callbacks in the iconv modules.  Implemented by Bruno Haible.
 201
 202 * With approriate thread add-ons cancelable functions are now implemented
 203   in libc.so as well.  No need to call the function in libpthread.  This
 204   change allowed to finally disable the incorrect and expensive handling
 205   of weak definition in ld.so.
 206
 207 * Yet more PLT entries in libc.so have been removed.  We finally arrived
 208   at the bare minimum.  Startup times improved appropriately.
 209
 210 * Support for the new Linux/x86 system call interface was added.  The
 211   AT_SYSINFO auxiliary vector entry is recognized and handled.
 212 \f
 213 Version 2.3
 214
 215 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
 216   charsets.
 217
 218 * iconv (the program and the interface) now accepts empty names (excluding
 219   options like //TRANSLIT) to mean "use charset of current locale".
 220
 221 * localedef can now transliterate characters in strings which are not in
 222   the provided charmap.  The information from the input locale is used.
 223
 224 * Prelinking support was added for ELF targets.  This requires additional
 225   tools and recent versions of the GNU binutils.  Contributed by Jakub Jelinek.
 226
 227 * Read-only stdio streams now use mmap to speed up operation by eliminating
 228   copying and buffer underflows.  To use add 'm' to the mode string of
 229   the fopen/fdopen/freopen call.  Implemented by Ulrich Drepper.
 230
 231 * The malloc functions were completely rewritten by Wolfram Gloger based
 232   on Doug Lea's malloc-2.7.0.c.
 233
 234 * Isamu Hasegawa contributed a completely new and POSIX-conformant
 235   implementation of regex.
 236
 237 * Bruno Haible upgraded the iconv and locale implementation to support
 238   Unicode 3.2.
 239
 240 * Contents of the LC_* and LANG environment variables in the CEN style are
 241   not recognized anymore.   It never was used.  Change by Ulrich Drepper.
 242
 243 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
 244   thread-local storage (TLS) ABI on some platforms.
 245   Changes by Ulrich Drepper.  SH support by Kaz Kojima.
 246
 247 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
 248   EUC-JISX0213, and TSCII.
 249
 250 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
 251   BSD-compatible interface for getting all network interface addresses.
 252   Implementation for IPv4 by Roland McGrath.
 253
 254 * Loading of locale data is faster due to the introduction of a locale
 255   archive.  Implemented by Roland McGrath and Ulrich Drepper.
 256
 257 * Startup times are significantly reduced by not using exported functions
 258   inside the library itself.  Changes by Jakub Jelinek, Roland McGrath,
 259   and Ulrich Drepper.
 260
 261 * Steven Munroe contributed a port to PowerPC64/Linux.
 262 \f
 263 Version 2.2.6
 264
 265 * The Hurd now uses the GNU libio implementation of stdio rather than the
 266   old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
 267
 268 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
 269   with the same behavior as the Linux system call of the same name.
 270 \f
 271 Version 2.2.5
 272
 273 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
 274   128-bit long double format.
 275
 276 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
 277   IBM1161, and IBM1162 charsets.
 278
 279 * Andreas Jaeger contributed a port to x86-64/Linux.
 280
 281 * Peter Bruin contributed a port to PowerPC/Hurd.
 282
 283 * libc functions using I/O streams now can handle wide-oriented streams
 284   as well.
 285
 286 * optimizations in the dynamic linker.  Binaries created by recent binutils
 287   versions start up quicker due to reduced time spent on relocations.
 288
 289 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
 290 \f
 291 Version 2.2.4
 292
 293 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
 294   asinh, atanh, j0 for the 128-bit long double format.
 295
 296 * Bruno Haible updated all the code handling Unicode in some form to
 297   support Unicode 3.1.
 298
 299 * Speed of regex for single-byte locales is back to previous levels.
 300   Patch by Isamu Hasegawa.
 301
 302 * Alpha, SPARC, and IA-64 now also using floating stacks.
 303
 304 * Startup time of internationalized applications greatly improved through
 305   iconv cache.  Use iconvconfig to generate the cache file.
 306   Contributed by Ulrich Drepper.
 307
 308 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
 309   severe performance problems.  Patch by David Mosberger.
 310
 311 * The Hurd port got a lot more functionality like AIO, various stdio
 312   extensions, etc.  Mainly done by Roland McGrath.
 313
 314 * mtrace can now lookup symbols in shared libraries.
 315 \f
 316 Version 2.2.3
 317
 318 * Intel's IA-64 math library is largely integrated.  It provides fast and
 319   accurate implementatations for most basic and standard math functions
 320   in float, double, and long double format.
 321
 322 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
 323   and asin for the 96-bit long double format and asin, log, tan for the
 324   128-bit long double format.
 325
 326 * The beginning of a last-bit accurate math library by IBM Haifa were added.
 327   The basic double functions exist today.  Contributed by Abraham Ziv
 328   <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
 329   <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
 330
 331 * An asynchronous name lookup library was added.  The interface is designed
 332   after POSIX AIO.  The proposal was circulated beforehand to get comments.
 333   No negative ones came in.  Implemented by Ulrich Drepper.
 334
 335 * Port to S390/64bit contributed by Martin Schwidefsky
 336   <schwidefsky@de.ibm.com>.
 337
 338 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
 339   of functions for Linux/IA-64.
 340
 341 * The RPC code is now thread safe.  Threads can now use the same service
 342   of different services at the same time.  Patch by Eric Norum
 343   <eric.norum@usask.ca> with some help by Ulrich Drepper.
 344
 345 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
 346   family of functions for Linux/S390.
 347
 348 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
 349   of functions for Linux/x86.
 350
 351 * Port to Linux/CRIS contributed by Axis Communications.
 352 \f
 353 Version 2.2.2
 354
 355 * Lots of headers were cleaned up.  Using the tool in the conform/ subdir
 356   we can now check for namespace violations and missing declarations.  The
 357   result is that almost all headers are now Unix-compliant (as defined in
 358   the upcoming XPG6).  The negative side is that some programs might need
 359   corrections, too, if they depend on the incorrect form of the headers in
 360   previous versions which defined too many symbols and included too many
 361   other headers.
 362
 363 * regex now handles multibyte character sets correctly.
 364   Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
 365
 366 * iconv (the program) does now conform to the upcoming XPG6 and handles
 367   charmaps.  Instead of the charset names the path of charmaps can be
 368   provided and the conversion happens based on this data.
 369   Contributed by Ulrich Drepper.
 370
 371 * The locale program now provides detailed information about the installed
 372   locales.  While
 373
 374     locale -a
 375
 376   only lists the names of the supported locales
 377
 378     locale -a --verbose
 379
 380   provides details such as country, language, and codeset name.
 381   Contributed by Ulrich Drepper.
 382 \f
 383 Version 2.2.1
 384
 385 * The gencat program now parses the input file according to the charset
 386   selected by the LC_CTYPE category.  This is important for stateful
 387   character sets.  To make generating catalogs easier there is a way
 388   to overwrite the charset selected by the locale: before the first
 389   message or $ quote line the catalog can contain a line like
 390
 391     $ codeset=ISO-8859-2
 392
 393   to select the charset (ISO-8859-2 in this case).
 394
 395   Implemented by Shinya Hanataka and Ulrich Drepper.
 396
 397 * New codeset conversion modules: IBM-922  (Estonia PC codeset),
 398   IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
 399   Contributed by Masahide Washizawa <washi@jp.ibm.com>.
 400
 401 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
 402   <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
 403
 404 * The LANGUAGE environment variable is now ignored unless the locale is
 405   changed from the default "C" locale.
 406
 407 * The usual bug fixes.
 408 \f
 409 Version 2.2
 410
 411 * Greg McGary added runtime support for bounds checking using gcc's
 412   new -fbounded-pointers option.  ix86 target is complete.  PowerPC
 413   is in progress.
 414
 415 * Thorsten Kukuk added secure mode support to nscd.
 416
 417 * The Berkeley db libraries have been removed.
 418
 419   Related, the nss_db module is now in a separate package since it
 420   obviously requires a database library being available.
 421
 422 * Wide character I/O streams implemented by Ulrich Drepper.
 423
 424 * Functions from the extended socket API added by Ulrich Drepper.
 425
 426 * Functions feenableexcept and fedisableexcept to control the
 427   behaviour of individual exceptions have been added by Andreas Jaeger.
 428
 429 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
 430
 431 * The resolver code has been updated from bind 8.2.3-T5B which supports
 432   threads.  The integration was done by Andreas Jaeger, Adam D. Bradley,
 433   and Mark Kettenis.
 434
 435   This change could in some situations effect backward compatibility.  Since
 436   now `_res' is a thread-local instead of a global variable, modifying it
 437   in one thread does not have any effect in other threads.
 438
 439   The resolver library was also extended to allow IPv6 as the transport
 440   protocol for the requests.  This work was done by Stig Venaas.
 441
 442 * Compatibility code for K&R C compilers has been removed from the
 443   header files.  A ISO C compiler is needed to use the library
 444   (conforming to either C89 or C99 standard).
 445
 446 * Complete rewrite of the localedef program to support multibyte character
 447   sets.  Implement handling of ISO 14651 and ISO 14652.  Rewrite strcoll,
 448   strxfrm, wcscoll, and wcsxfrm functions.  Make isw*() functions work.
 449   Implemented by Ulrich Drepper.
 450
 451   Bruno Haible significantly improved the generation and use of the data
 452   structures for the wide character tables.
 453
 454 * Plural handling in gettext implemented by Ulrich Drepper.
 455
 456 * The utmp daemon has been removed.
 457
 458 * The port to MIPS-Linux has been finished by Andreas Jaeger.
 459
 460 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
 461   and Yutaka Niibe.
 462
 463 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
 464
 465 * POSIX barriers implemented by Kaz Kylheku.
 466
 467 * POSIX spawn function family implemented by Ulrich Drepper.
 468
 469 * POSIX spinlocks are now available.
 470
 471 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
 472
 473 * the configure option --enable-kernel=X.Y.Z allows to strip out
 474   compatibility for kernel versions before X.Y.Z.  This is currently only
 475   implemented for Linux.
 476
 477 * the sockaddr_in6 structure changed.  The IPv6 working group added a new
 478   field sin6_scope_id.  This means that all programs using IPv6 should be
 479   recompiled.  Don't expect binary compatibility with previous glibc
 480   versions.
 481
 482 * various conversion modules for IBM character sets contributed by
 483   Masahide Washizawa.
 484
 485 * IA-64 port by Jes Sorensen and HJ Lu.
 486
 487 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 488 Compiling the GNU C Library for Linux/ia64
 489 ******************************************
 490
 491    Please refer to the file INSTALL in the same directory as you found
 492 this file for general information about configuring and compiling
 493 glibc.
 494
 495    For general inquiries about glibc under Linux/ia64 please use the
 496 following mailing list linux-ia64@linuxia64.org or one of the relevant
 497 glibc mailing lists.
 498
 499 Recommended Tools for Compilation
 500 =================================
 501
 502    In order for glibc-2.2 to build correctly on the ia64 you need at
 503 least the following versions of the GNU tools (the :
 504
 505    * The Cygnus toolchain snapshot for the ia64 as of August 4
 506      including the provided set of patches.  It is however recommend
 507      you use the October 24 toolchain snapshot or a more recent version.
 508
 509    OR alternatively you can try the following (the Cygnus toolchain is
 510    the recommended solution):
 511
 512    * GCC and binutils, GAS and GNU LD out of CVS from
 513      sources.redhat.com as of August 28, 2000 or later.  The CVS tree
 514      may require special patches to work properly on the ia64.
 515
 516 Configuring and compiling GNU Libc for Linux/ia64
 517 =================================================
 518
 519    The library requires Linux kernel version 2.4.0-test4-000728 or
 520 later to funtion properly. Besides that it support for debug libraries
 521 is currently untested. Hence the following options
 522 are required for configuring the library:
 523
 524    --disable-debug --enable-kernel=2.4.0
 525
 526    It is also important that you make sure the library picks up the
 527 appropriate kernel header files, if you do not have recent enough
 528 kernel headers in /usr/src/linux/include, you should use the
 529 --with-headers=<path> option to specify the location.
 530
 531    As an example I personally use the following options to configure
 532 the library:
 533
 534    --disable-debug
 535    --disable-cvs
 536    --enable-kernel=2.4.0
 537    --host=ia64-linux
 538    --enable-add-ons=yes
 539    --prefix=/usr
 540    --with-headers=/home/jes/linux/include
 541
 542
 543 Good luck
 544
 545 Jes Sorensen <jes@linuxcare.com>,
 546 November 14th, 2000
 547 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 548 \f
 549 Version 2.1.3
 550
 551 * bug fixes
 552
 553 \f
 554 Version 2.1.2
 555
 556 * bug fixes
 557
 558 \f
 559 Version 2.1.1
 560
 561 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
 562
 563 * New xdr functions are added; some rpc functions are now 64bit clean.
 564
 565 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
 566
 567 * Fixed known incompatibilities with glibc 2.0.
 568
 569 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
 570
 571 * Optimized a number of functions (especially the ELF dynamic loader).
 572
 573 * Update timezone data files.
 574
 575 * lots of charmaps corrections
 576
 577 * some new locale definitions and charmaps
 578
 579 \f
 580 Version 2.1
 581
 582 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
 583   conform to POSIX member type requirements.  Symbol versions have been
 584   adjusted as needed within the library, and for direct use by applications,
 585   but there is potential for problems if third-party libraries use
 586   struct timeval as part of their interface.  This does not present
 587   a problem for X and other "essential" system libraries.
 588
 589 * An additional locale model to support C++ Standard Library locale
 590   model and probably more was implemented by Ulrich Drepper.
 591
 592 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
 593   symbol level.
 594
 595 * Miles Bader provided the `argp' function family to support hierachical
 596   command line argument parsing, layered on top of getopt.
 597
 598 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
 599
 600 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
 601   numbers.
 602
 603 * scanf recognizes the %a and %A format for scanning floating point numbers.
 604
 605 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
 606   information and interfaces for the available integer types.
 607
 608 * about 130 new math functions were added to implement the ISO C9x math
 609   library.
 610
 611 * the new header <complex.h> contains definitions of the complex math
 612   functions from ISO C 9X.
 613
 614 * the new header <tgmath.h> defines generic macros to use complex or
 615   real valued functions.
 616
 617 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
 618
 619 * Andreas Jaeger provided a test suite for the math library.
 620
 621 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
 622
 623 * Ulrich Drepper added character set conversion functions (iconv).
 624
 625 * Optimized string functions have been added.
 626
 627 * The localedata addon is now part of glibc.
 628
 629 * An implementation of profiling shared libraries was added by Ulrich Drepper.
 630
 631 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
 632   daemon for NSS (nscd).
 633
 634   Missing a better place here are some numbers on improvements.  Under
 635   Linux 2.1.125 un-tar-ing the kernel sources takes
 636
 637                                   user  system     wall
 638
 639     using local files           12.19s   6.88s   22.91s
 640
 641     using NIS                   13.92s   8.91s   26.34s
 642
 643     using NIS & nscd            10.37s   7.34s   25.30s
 644
 645     using NIS+                  27.57s  30.37s  640.46s
 646
 647     using NIS+ & nscd           10.25s   7.83s   26.51s
 648
 649     using NIS & old nscd [1]    13.83s   8.32s   29.60s
 650
 651   Keep in mind that non-namelookup related operations dominate above times.
 652   It was just a common complain that using NIS+ unpacking the kernel is
 653   horribly slow.
 654
 655   [1] The old nscd implementation is not available anymore since it was
 656   distributed with glibc up to version 2.0.98 and thus is now replaced.
 657
 658 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
 659
 660 * Mark Kettenis provided a Hesiod NSS module.
 661
 662 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
 663   and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
 664
 665 * rcmd can now handle netgroups (Dick Streefland).
 666
 667 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
 668   Bambrough.
 669
 670 * Support for the IPv6 protocol has been added to the socket API, as per the
 671   latest draft standards.
 672
 673 * Support for Linux 2.2 has been added.
 674
 675 * Interface changes relative to the latest 2.0.x release:
 676 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 677 addseverity                     NEW: Unix98
 678 alphasort64                     NEW: LFS
 679 argp_err_exit_status            NEW: argp, GNU ext
 680 argp_error                      NEW: argp, GNU ext
 681 argp_failure                    NEW: argp, GNU ext
 682 argp_help                       NEW: argp, GNU ext
 683 argp_parse                      NEW: argp, GNU ext
 684 argp_program_bug_address        NEW: argp, GNU ext
 685 argp_program_version            NEW: argp, GNU ext
 686 argp_program_version_hook       NEW: argp, GNU ext
 687 argp_state_help                 NEW: argp, GNU ext
 688 argp_usage                      NEW: argp, GNU ext
 689 authdes_create                  NEW: Secure RPC
 690 authdes_getucred                NEW: Secure RPC
 691 authdes_pk_create               NEW: Secure RPC
 692 backtrace                       NEW: GNU ext.
 693 backtrace_symbols               NEW: GNU ext.
 694 backtrace_symbols_fd            NEW: GNU ext.
 695 cacos                           NEW: ISO C 9x
 696 cacosf                          NEW: ISO C 9x
 697 cacosh                          NEW: ISO C 9x
 698 cacoshf                         NEW: ISO C 9x
 699 cacoshl                         NEW: ISO C 9x
 700 cacosl                          NEW: ISO C 9x
 701 capget                          NEW: kernel
 702 capset                          NEW: kernel
 703 carg                            NEW: ISO C 9x
 704 cargf                           NEW: ISO C 9x
 705 cargl                           NEW: ISO C 9x
 706 casin                           NEW: ISO C 9x
 707 casinf                          NEW: ISO C 9x
 708 casinh                          NEW: ISO C 9x
 709 casinhf                         NEW: ISO C 9x
 710 casinhl                         NEW: ISO C 9x
 711 casinl                          NEW: ISO C 9x
 712 catan                           NEW: ISO C 9x
 713 catanf                          NEW: ISO C 9x
 714 catanh                          NEW: ISO C 9x
 715 catanhf                         NEW: ISO C 9x
 716 catanhl                         NEW: ISO C 9x
 717 catanl                          NEW: ISO C 9x
 718 cbc_crypt                       NEW: Secure RPC
 719 ccos                            NEW: ISO C 9x
 720 ccosf                           NEW: ISO C 9x
 721 ccosh                           NEW: ISO C 9x
 722 ccoshf                          NEW: ISO C 9x
 723 ccoshl                          NEW: ISO C 9x
 724 ccosl                           NEW: ISO C 9x
 725 cexp                            NEW: ISO C 9x
 726 cexpf                           NEW: ISO C 9x
 727 cexpl                           NEW: ISO C 9x
 728 cimag                           NEW: ISO C 9x
 729 cimagf                          NEW: ISO C 9x
 730 cimagl                          NEW: ISO C 9x
 731 clearerr_locked                 REMOVED
 732 clntunix_create                 NEW: sunrpc ext
 733 clog                            NEW: ISO C 9x
 734 clog10                          NEW: ISO C 9x
 735 clog10f                         NEW: ISO C 9x
 736 clog10l                         NEW: ISO C 9x
 737 clogf                           NEW: ISO C 9x
 738 clogl                           NEW: ISO C 9x
 739 conj                            NEW: ISO C 9x
 740 conjf                           NEW: ISO C 9x
 741 conjl                           NEW: ISO C 9x
 742 cpow                            NEW: ISO C 9x
 743 cpowf                           NEW: ISO C 9x
 744 cpowl                           NEW: ISO C 9x
 745 cproj                           NEW: ISO C 9x
 746 cprojf                          NEW: ISO C 9x
 747 cprojl                          NEW: ISO C 9x
 748 creal                           NEW: ISO C 9x
 749 crealf                          NEW: ISO C 9x
 750 creall                          NEW: ISO C 9x
 751 creat64                         NEW: LFS
 752 csin                            NEW: ISO C 9x
 753 csinf                           NEW: ISO C 9x
 754 csinh                           NEW: ISO C 9x
 755 csinhf                          NEW: ISO C 9x
 756 csinhl                          NEW: ISO C 9x
 757 csinl                           NEW: ISO C 9x
 758 csqrt                           NEW: ISO C 9x
 759 csqrtf                          NEW: ISO C 9x
 760 csqrtl                          NEW: ISO C 9x
 761 ctan                            NEW: ISO C 9x
 762 ctanf                           NEW: ISO C 9x
 763 ctanh                           NEW: ISO C 9x
 764 ctanhf                          NEW: ISO C 9x
 765 ctanhl                          NEW: ISO C 9x
 766 ctanl                           NEW: ISO C 9x
 767 des_setparity                   NEW: Secure RPC
 768 ecb_crypt                       NEW: Secure RPC
 769 endutxent                       NEW: Unix98
 770 exp10                           NEW: ISO C 9x
 771 exp10f                          NEW: ISO C 9x
 772 exp10l                          NEW: ISO C 9x
 773 exp2                            NEW: ISO C 9x
 774 exp2f                           NEW: ISO C 9x
 775 exp2l                           NEW: ISO C 9x
 776 fattach                         NEW: STREAMS
 777 fdetach                         NEW: STREAMS
 778 fdim                            NEW: ISO C 9x
 779 fdimf                           NEW: ISO C 9x
 780 fdiml                           NEW: ISO C 9x
 781 feclearexcept                   NEW: ISO C 9x
 782 fegetenv                        NEW: ISO C 9x
 783 fegetexceptflag                 NEW: ISO C 9x
 784 fegetround                      NEW: ISO C 9x
 785 feholdexcept                    NEW: ISO C 9x
 786 feof_locked                     REMOVED
 787 feraiseexcept                   NEW: ISO C 9x
 788 ferror_locked                   REMOVED
 789 fesetenv                        NEW: ISO C 9x
 790 fesetexceptflag                 NEW: ISO C 9x
 791 fesetround                      NEW: ISO C 9x
 792 fetestexcept                    NEW: ISO C 9x
 793 feupdateenv                     NEW: ISO C 9x
 794 fflush_locked                   REMOVED
 795 ffsl                            NEW: GNU ext.
 796 ffsll                           NEW: GNU ext.
 797 fgetpos64                       NEW: LFS
 798 fgets_unlocked                  NEW: GNU ext.
 799 fileno_locked                   REMOVED
 800 fma                             NEW: ISO C 9x
 801 fmaf                            NEW: ISO C 9x
 802 fmal                            NEW: ISO C 9x
 803 fmax                            NEW: ISO C 9x
 804 fmaxf                           NEW: ISO C 9x
 805 fmaxl                           NEW: ISO C 9x
 806 fmin                            NEW: ISO C 9x
 807 fminf                           NEW: ISO C 9x
 808 fminl                           NEW: ISO C 9x
 809 fmtmsg                          NEW: Unix98
 810 fopen64                         NEW: LFS
 811 fputc_locked                    REMOVED
 812 fputs_unlocked                  NEW: GNU ext.
 813 fread_unlocked                  NEW: GNU ext.
 814 freopen64                       NEW: LFS
 815 fseeko                          NEW: Unix98
 816 fsetpos64                       NEW: LFS
 817 fstatfs64                       NEW: LFS
 818 fstatvfs                        NEW: Unix98
 819 fstatvfs64                      NEW: LFS
 820 ftello                          NEW: Unix98
 821 ftello64                        NEW: LFS
 822 ftruncate64                     NEW: LFS
 823 ftw64                           NEW: LFS
 824 fwrite_unlocked                 NEW: GNU ext.
 825 gai_strerror                    NEW: IPv6
 826 gamma_r                         REMOVED
 827 gammaf_r                        REMOVED
 828 gammal_r                        REMOVED
 829 getchar_locked                  REMOVED
 830 getdate                         NEW: Unix98
 831 getdate_err                     NEW: Unix98
 832 getdate_r                       NEW: GNU ext.
 833 getmsg                          NEW: STREAMS
 834 getnameinfo                     NEW: IPv6
 835 getnetname                      NEW: Secure RPC
 836 getpmsg                         NEW: STREAMS
 837 getpt                           NEW: Unix98 PTY
 838 getrlimit64                     NEW: LFS
 839 getutxent                       NEW: Unix98
 840 getutxid                        NEW: Unix98
 841 getutxline                      NEW: Unix98
 842 glob64                          NEW: GNU ext.
 843 globfree64                      NEW: GNU ext.
 844 gnu_get_libc_release            NEW: GNU ext.
 845 gnu_get_libc_version            NEW: GNU ext.
 846 grantpt                         NEW: Unix98 PTY
 847 host2netname                    NEW: Secure RPC
 848 iconv                           NEW: iconv
 849 iconv_close                     NEW: iconv
 850 iconv_open                      NEW: iconv
 851 if_freenameindex                NEW: IPv6
 852 if_indextoname                  NEW: IPv6
 853 if_nameindex                    NEW: IPv6
 854 if_nametoindex                  NEW: IPv6
 855 in6addr_any                     NEW: IPv6
 856 in6addr_loopback                NEW: IPv6
 857 inet6_isipv4mapped              NEW: IPv6
 858 isastream                       NEW: STREAMS
 859 iswblank                        NEW: GNU ext.
 860 key_decryptsession              NEW: Secure RPC
 861 key_decryptsession_pk           NEW: Secure RPC
 862 key_encryptsession              NEW: Secure RPC
 863 key_encryptsession_pk           NEW: Secure RPC
 864 key_gendes                      NEW: Secure RPC
 865 key_get_conv                    NEW: Secure RPC
 866 key_secretkey_is_set            NEW: Secure RPC
 867 key_setnet                      NEW: Secure RPC
 868 key_setsecret                   NEW: Secure RPC
 869 llrint                          NEW: ISO C 9x
 870 llrintf                         NEW: ISO C 9x
 871 llrintl                         NEW: ISO C 9x
 872 llround                         NEW: ISO C 9x
 873 llroundf                        NEW: ISO C 9x
 874 llroundl                        NEW: ISO C 9x
 875 log2                            NEW: ISO C 9x
 876 log2f                           NEW: ISO C 9x
 877 log2l                           NEW: ISO C 9x
 878 lrint                           NEW: ISO C 9x
 879 lrintf                          NEW: ISO C 9x
 880 lrintl                          NEW: ISO C 9x
 881 lround                          NEW: ISO C 9x
 882 lroundf                         NEW: ISO C 9x
 883 lroundl                         NEW: ISO C 9x
 884 lseek64                         NEW: LFS
 885 makecontext                     NEW: Unix98
 886 mempcpy                         NEW: GNU ext.
 887 mmap64                          NEW: LFS
 888 moncontrol                      REMOVED
 889 modify_ldt                      NEW: kernel
 890 nan                             NEW: ISO C 9x
 891 nanf                            NEW: ISO C 9x
 892 nanl                            NEW: ISO C 9x
 893 nearbyint                       NEW: ISO C 9x
 894 nearbyintf                      NEW: ISO C 9x
 895 nearbyintl                      NEW: ISO C 9x
 896 netname2host                    NEW: Secure RPC
 897 netname2user                    NEW: Secure RPC
 898 nexttoward                      NEW: ISO C 9x
 899 nexttowardf                     NEW: ISO C 9x
 900 nexttowardl                     NEW: ISO C 9x
 901 nftw                            NEW: Unix98
 902 nftw64                          NEW: LFS
 903 open64                          NEW: LFS
 904 passwd2des                      NEW: Secure RPC
 905 pow10                           NEW: GNU ext.
 906 pow10f                          NEW: GNU ext.
 907 pow10l                          NEW: GNU ext.
 908 pread                           NEW: Unix98
 909 pread64                         NEW: LFS
 910 printf_size                     NEW: GNU ext.
 911 printf_size_info                NEW: GNU ext.
 912 profil_counter                  REMOVED
 913 pthread_mutexattr_getkind_np    REPLACED
 914 pthread_mutexattr_setkind_np    REPLACED
 915 ptsname                         NEW: Unix98 PTY
 916 ptsname_r                       NEW: Unix98 PTY
 917 putc_locked                     REMOVED
 918 putchar_locked                  REMOVED
 919 putgrent                        NEW: GNU ext.
 920 putmsg                          NEW: STREAMS
 921 putpmsg                         NEW: STREAMS
 922 pututxline                      NEW: Unix98
 923 pwrite                          NEW: Unix98
 924 pwrite64                        NEW: LFS
 925 readdir64                       NEW: LFS
 926 readdir64_r                     NEW: LFS
 927 remquo                          NEW: ISO C 9x
 928 remquof                         NEW: ISO C 9x
 929 remquol                         NEW: ISO C 9x
 930 round                           NEW: ISO C 9x
 931 roundf                          NEW: ISO C 9x
 932 roundl                          NEW: ISO C 9x
 933 rtime                           NEW: GNU ext.
 934 scalbln                         NEW: ISO C 9x
 935 scalblnf                        NEW: ISO C 9x
 936 scalblnl                        NEW: ISO C 9x
 937 scandir64                       NEW: LFS
 938 sendfile                        NEW: kernel
 939 setcontext                      NEW: Unix98
 940 setrlimit64                     NEW: LFS
 941 setutxent                       NEW: Unix98
 942 sighold                         NEW: Unix98
 943 sigignore                       NEW: Unix98
 944 sigqueue                        NEW: POSIX.1b
 945 sigrelse                        NEW: Unix98
 946 sigset                          NEW: POSIX.1b
 947 sigtimedwait                    NEW: POSIX.1b
 948 sigwaitinfo                     NEW: POSIX.1b
 949 sincos                          NEW: GNU ext.
 950 sincosf                         NEW: GNU ext.
 951 sincosl                         NEW: GNU ext.
 952 statfs64                        NEW: LFS
 953 statvfs                         NEW: Unix98
 954 statvfs64                       NEW: LFS
 955 strcasestr                      NEW: GNU ext.
 956 strtoimax                       NEW: ISO C 9x
 957 strtoumax                       NEW: ISO C 9x
 958 strverscmp                      NEW: GNU ext.
 959 svcauthdes_stats                NEW: Secure RPC
 960 svcunix_create                  NEW: sunrpc etx
 961 svcunixfd_create                NEW: sunrpc ext
 962 swapcontext                     NEW: Unix98
 963 tcgetsid                        NEW: Unix98 PTY
 964 tdestroy                        NEW: GNU ext.
 965 tgamma                          NEW: ISO C 9x
 966 tgammaf                         NEW: ISO C 9x
 967 tgammal                         NEW: ISO C 9x
 968 tmpfile64                       NEW: LFS
 969 trunc                           NEW: ISO C 9x
 970 truncate64                      NEW: LFS
 971 truncf                          NEW: ISO C 9x
 972 truncl                          NEW: ISO C 9x
 973 umount2                         NEW: kernel
 974 unlockpt                        NEW: Unix98 PTY
 975 updwtmpx                        NEW: Unix98
 976 user2netname                    NEW: Secure RPC
 977 utmpxname                       NEW: Unix98
 978 versionsort                     NEW: GNU ext.
 979 versionsort64                   NEW: GNU ext.
 980 waitid                          NEW: Unix98
 981 wcscasecmp                      NEW: GNU ext.
 982 wcsncasecmp                     NEW: GNU ext.
 983 wcsnlen                         NEW: GNU ext.
 984 wcstoimax                       NEW: ISO C 9x
 985 wcstoll                         NEW: ISO C 9x
 986 wcstoull                        NEW: ISO C 9x
 987 wcstoumax                       NEW: ISO C 9x
 988 wcswcs                          NEW: Unix98
 989 wordexp                         NEW: POSIX.2
 990 wordfree                        NEW: POSIX.2
 991 write_profiling                 REMOVED
 992 xdecrypt                        NEW: Secure RPC
 993 xdr_authdes_cred                NEW: Secure RPC
 994 xdr_authdes_verf                NEW: Secure RPC
 995 xdr_cryptkeyarg                 NEW: Secure RPC
 996 xdr_cryptkeyarg2                NEW: Secure RPC
 997 xdr_cryptkeyres                 NEW: Secure RPC
 998 xdr_getcredres                  NEW: Secure RPC
 999 xdr_key_netstarg                NEW: Secure RPC
1000 xdr_key_netstres                NEW: Secure RPC
1001 xdr_keybuf                      NEW: Secure RPC
1002 xdr_keystatus                   NEW: Secure RPC
1003 xdr_netnamestr                  NEW: Secure RPC
1004 xdr_sizeof                      NEW: Secure RPC
1005 xdr_unixcred                    NEW: sunrpc ext
1006 xencrypt                        NEW: Secure RPC
1007 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1008 \f
1009 Version 2.0.6
1010
1011 * more bug fixes
1012
1013 \f
1014 Version 2.0.5
1015
1016 * more bug fixes
1017
1018 * inet_ntoa is thread-safe
1019
1020 * updwtmp is moved from libutil to libc
1021
1022 * rewrite of cbrt function
1023
1024 * update of timezone data
1025 \f
1026 Version 2.0.4
1027
1028 * more bug fixes
1029 \f
1030 Version 2.0.3
1031
1032 * more bug fixes
1033 \f
1034 Version 2.0.2
1035
1036 * more bug fixes
1037
1038 * add atoll function
1039
1040 * fix complex problems in Berkeley DB code
1041
1042 * fix math functions
1043 \f
1044 Version 2.0.1
1045
1046 * fixed lots of header problems (especially Linux/GNU specific)
1047
1048 * dynamic loader preserves all registers
1049
1050 * Roland McGrath provided support for handling of auxiliary objects in
1051   the ELF dynamic loader.
1052
1053 * support for parallel builds is improved
1054 \f
1055 Version 2.0
1056
1057 * GNU extensions are no longer declared by default.  To enable them you
1058   must define the macro `_GNU_SOURCE' in your program or compile with
1059   `-D_GNU_SOURCE'.
1060
1061 * The library has changed from using GNU ld symbol aliases to using weak
1062   symbols where available.  The ELF object file format supports weak
1063   symbols; GNU ld also supports weak symbols in the a.out format.  (There
1064   is also now support for other GNU ld extensions in ELF.  Use the
1065   `--with-elf' option to configure to indicate you have ELF, and
1066   `--with-gnu-ld' if using GNU ld.)  This change resulted in the deletion
1067   of many files which contained only symbol aliases, reducing the size of
1068   the source and the compiled library; many other files were renamed to
1069   less cryptic names previously occupied by the symbol alias files.
1070   There is a new header file <elf.h> for programs which operate on
1071   files in the ELF format.
1072
1073 * Converted to Autoconf version 2, so `configure' has more options.
1074   Run `configure --help' to see the details.
1075
1076 * The library can now be configured to build profiling, highly-optimized
1077   (but undebuggable), and/or shared libraries (ELF with GNU ld only).  The
1078   `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1079   `configure' enable building these extra libraries.  The shared library is
1080   built by default when using both ELF and GNU ld.  When shared libraries
1081   are enabled, the new library `-ldl' is available for arbitrary run-time
1082   loading of shared objects; its interface is defined in <dlfcn.h>.  The
1083   new header file <link.h> gives access to the internals of the run-time
1084   dynamic linker, `ld.so'.  The shell script `ldd' is similar to the
1085   application of same name on other systems and it provides information
1086   about dynamically linked binaries.
1087
1088 * The C library now provides the run-time support code for profiling
1089   executables compiled with `-pg'.  Programs can control the profiling code
1090   through the interface in <sys/gmon.h>.  The `gmon.out' files written by
1091   the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1092   the support for this file format was contributed by David Mosberger-Tang.
1093
1094 * The math code has been replaced with a math library based on fdlibm from
1095   Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1096   Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1097   functions.  The math functions now reside in a separate library,  so
1098   programs using them will need to use `-lm' their linking commands.
1099
1100 * John C. Bowman contributed optimized ix87 assembler inline functions.
1101
1102 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1103   mechanism similar to that found in Solaris 2.  This is now used for the
1104   group, passwd, hosts, networks, services, protocols, rpc, ethers,
1105   shadow, netgroup, publickey, and alias databases.  The `nsswitch.conf'
1106   file controls what services are used for each individual database.  This
1107   works by loading shared libraries with names specified in `nsswitch.conf',
1108   so service modules can be changed or added at any time without even
1109   relinking any program.  Currently there are the file, db, and NIS based
1110   NSS services available.
1111
1112 * The new functions `strtoq' and `strtouq' parse integer values from
1113   strings, like `strtol' and `strtoul', but they return `long long int' and
1114   `unsigned long long int' values, respectively (64-bit quantities).
1115
1116 * The new functions `strtof' and `strtold' parse floating-point values from
1117   strings, like `strtod', but they return `float' and `long double' values,
1118   respectively (on some machines `double' and `long double' are the same).
1119
1120 * Ulrich Drepper has contributed new implementations of the floating-point
1121   printing and reading code used in the `printf' family of functions and
1122   `strtod', `strtof', and `strtold'.  These new functions are perfectly
1123   accurate, and much faster than the old ones.
1124
1125 * The implementation of the POSIX locale model was completely rewritten by
1126   Ulrich Drepper.  This includes the new programs `localedef' and `locale'
1127   to compile the POSIX locale definition.
1128
1129 * The former dummy implementations of the strcoll and strxfrm function are
1130   now replaced by fully functional code contributed by Ulrich Drepper.  The
1131   collation information comes from the POSIX locale definitions.
1132
1133 * The new header <langinfo.h> defines an interface for accessing
1134   various locale-dependent data (using the locale chosen with `setlocale').
1135
1136 * Ulrich Drepper has contributed a new suite of functions for operation on
1137   wide-character and multibyte-character strings, in <wchar.h>;
1138   and classification and case conversion of wide characters, in <wctype.h>.
1139   These new functions are conforming to the ISO C, Amendement 1 specification.
1140
1141 * There is now a second implementation of the standard I/O library available.
1142   It comes from GNU libg++ as was written by Per Bothner, heavily modified
1143   by Hongjiu Lu and made thread safe by Ulrich Drepper.
1144
1145 * You can now use positional parameter specifications in format strings
1146   for the `printf' and `scanf' families of functions.  For example,
1147   `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1148   ``Number 6, Mr Jones''.  This is mainly useful when providing different
1149   format strings for different languages, whose grammars may dictate
1150   different orderings of the values being printed.  To support this
1151   feature, the interface for `register_printf_handler' has changed; see
1152   the header file <printf.h> for details.
1153
1154 * The `printf' and `scanf' families of functions now understand a new
1155   formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1156   to group numbers as indicated by the locale; for `scanf' and friends, this
1157   says to accept as valid only a number with all the proper grouping
1158   separators in the right places.  In the default "C" locale, numbers are
1159   not grouped; but locales for specific countries will define the usual
1160   conventions (i.e. separate thousands with `,' in the US locale).
1161
1162 * The pgrp functions have been regularized, slightly incompatibly but much
1163   less confusingly.  The core functions are now `getpgid' and `setpgid',
1164   which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1165   argument) and BSD `setpgrp' (identical to `setpgid') functions are
1166   provided for compatibility.  There is no longer an incompatible `getpgrp'
1167   with an argument declared under _BSD_SOURCE; no BSD code uses it.
1168
1169 * The new header file <fts.h> and suite of functions simplify programs that
1170   operate on directory trees.  This code comes from 4.4 BSD.
1171
1172 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1173   Parts of the code were heavily modified by Ulrich Drepper to fit in the
1174   NSS scheme used in glibc.
1175
1176 * There is a new malloc debugging hook `__memalign_hook'.
1177
1178 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1179   `unsigned int' in <sys/types.h>.  These are for compatibility only and
1180   their use is discouraged.
1181
1182 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1183   done differently, so that it works even without GNU ld.
1184
1185 * New function `euidaccess' checks allowed access to a file like `access',
1186   but using the effective IDs instead of the real IDs.
1187
1188 * The time zone data files have been updated for the latest and greatest
1189   local time conventions of the countries of the world.
1190
1191 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1192   see <dirent.h>.
1193
1194 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1195   for formatting floating-point numbers.  They are provided only for
1196   compatibility; new programs should use `sprintf' instead.  There are
1197   also equivalent function for the `long double' floating-point type and
1198   all functions also exist in a reentrant form.
1199
1200 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1201   functions for maintaining the login-record files (primarily of use to
1202   system programs such as `login'), and convenient functions for
1203   allocating and initializing a pseudo-terminal (pty) device.
1204
1205 * Ulrich Drepper has contributed new support for System V style
1206   shared memory and IPC on systems that support it.
1207
1208 * Ulrich Drepper has contributed several miscellaneous new functions found
1209   in System V: The `hsearch' family of functions provide an effective
1210   implementation of hash tables; `a64l' and `l64a' provide a very simple
1211   binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1212   number generator.
1213
1214 * Ulrich Drepper has contributed new reentrant counterparts for the
1215   `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1216
1217 * Ulrich Drepper has contributed new, highly-optimized versions of several
1218   string functions for the i486/Pentium family of processors.
1219
1220 * Ulrich Drepper has updated the Linux-specific code, based largely
1221   on work done in Hongjiu Lu's version of GNU libc for Linux.
1222   The GNU library now supports Linux versions 2.0.10 and later,
1223   using the ELF object file format (i[3456]86-*-linux).
1224
1225 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1226
1227 * David Mosberger-Tang and Richard Henderson have ported the C library
1228   to Linux/Alpha (alpha-*-linux).  Richard Henderson contributed the
1229   dynamic linking support for ELF/Alpha.
1230
1231 * Richard Henderson contributed several Alpha optimized assembler function
1232   for arithmetic and string handling.
1233
1234 * Ulrich Drepper has contributed a new set of message catalog functions to
1235   support multiple languages using the <libintl.h> interface, for use with
1236   his new package GNU gettext.  Translation volunteers have contributed
1237   catalogs of the library's messages in Spanish, German, and Korean.
1238
1239 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1240   program and the `catgets' function for reading the catalog files it
1241   creates.  (The <libintl.h> interface is preferred; we include the
1242   <nl_types.h> interface using `catgets' only for source compatibility with
1243   programs already written to use it.)
1244
1245 * New header file <values.h> gives SVID-compatible names for <limits.h>
1246   constants.
1247
1248 * Various new macros, declarations, and small header files for compatibility
1249   with 4.4 BSD.
1250
1251 * New function `group_member' is a convenient way to check if a process has
1252   a given effective group ID.
1253
1254 * When using GCC 2.7 and later, the socket functions are now declared in a
1255   special way so that passing an argument of type `struct sockaddr_in *',
1256   `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1257   `struct sockaddr *' type, does not generate a type-clash warning.
1258
1259 * New function `error' declared in header file <error.h> is a convenient
1260   function for printing error messages and optionally exiting; this is the
1261   canonical function used in GNU programs.  The new functions `err', `warn',
1262   and friends in header file <err.h> are the canonical 4.4 BSD interface for
1263   doing the same thing.
1264
1265 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1266   POSIX.2 `glob' function to do ~ and {...} expansion.
1267
1268 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1269   `clearenv' which is used in POSIX.9 is also available.
1270
1271 * New function `getsid' returns session ID number on systems that support it.
1272
1273 * We have incorporated the 4.4 BSD `db' library (version 1.85).  New header
1274   files <db.h> and <mpool.h> provide a rich set of functions for several
1275   types of simple databases stored in memory and in files, and <ndbm.h> is
1276   an old `ndbm'-compatible interface using the `db' functions.  Link with
1277   `-ldb' to get these functions.
1278
1279 * New macro `strdupa' copies a string like `strdup', but uses local stack
1280   space from `alloca' instead of dynamic heap space from `malloc'.
1281
1282 * New function `strnlen' is like `strlen' but searches only a given maximum
1283   number of characters for the null terminator.  `stpncpy', `strndup' and
1284   `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1285   function.
1286
1287 * New function `statfs' in header <sys/statfs.h>.
1288
1289 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1290   provide convenient functions for operating on blocks of null-terminated
1291   strings.
1292
1293 * A new suite of functions in <utmp.h> handle all the details of reading
1294   and writing the utmp file.
1295
1296 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1297   Thorsten Kukuk.
1298
1299 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1300   completely POSIX compliant and also implemented the extended functionality
1301   to handle alternate digit representation and alternate era date formats.
1302
1303 * Ulrich Drepper provided an implementation of the `strptime' function
1304   defined in XPG4.2 which transforms a string into a `struct tm' value.
1305
1306 * Paul Eggert provided the tzselect shell script as part of the timezone
1307   code.  The shell script makes it easy to select the correct timezone
1308   specification.
1309
1310 * The implementation of the malloc family of functions is completely replaced
1311   by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1312   The implementation uses the mmap function (if available) and it is
1313   optimized for the use in multi threaded programs.
1314
1315 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1316   functions.  This new functionality is usable by specifying a special
1317   salt string and it is compatible with implementation on *BSD systems.
1318
1319 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1320   `getsubopt' to handle second level command line options, `bsd_signal'
1321   to access BSD style `signal' functionality, the obsolete `regexp' style
1322   expression matcher.
1323
1324 * the `lchown' function is available on system which support this
1325   functionality.
1326
1327 * The implementation of the shadow password handling function was contributed
1328   by Ulrich Drepper.
1329
1330 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1331
1332 * POSIX.1g support was added.  The <sys/select.h> header is available,
1333   `isfdtype' and `pselect' are implemented.  Craig Metz contributed an
1334   implementation of `getaddrinfo'.
1335 \f
1336 Version 1.09
1337
1338 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1339
1340 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1341   friends, for parsing /etc/fstab.  This code comes from 4.4 BSD.
1342
1343 * The new function `daemon' from 4.4 BSD is useful for server programs that
1344   want to put themselves in the background.
1345
1346 * Joel Sherrill has contributed support for several standalone boards that
1347   run without an operating system.
1348
1349 * `printf', `scanf' and friends now accept a `q' type modifier for long
1350   long int as well as `ll'.  Formats using these might be `%qu' or `%lld'.
1351
1352 * All of the code taken from BSD (notably most of the math and networking
1353   routines) has been updated from the BSD 4.4-Lite release.
1354
1355 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1356
1357 * The new functions `getdomainname' and `setdomainname' fetch or change the
1358   YP/NIS domain name.  These are system calls which exist on systems which
1359   have YP (aka NIS).
1360
1361 * The time zone data files have been updated for the latest international
1362   conventions.
1363
1364 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1365   $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1366 \f
1367 Version 1.08
1368
1369 * The C library now includes support for Sun RPC, from Sun's free
1370   RPCSRC-4.0 distribution.  The `portmap', `rpcinfo', and `rpcgen' programs
1371   are included.  (There is still no support for YP.)
1372
1373 * Tom Quinn has contributed a port of the C library to SGI machines running
1374   Irix 4 (mips-sgi-irix4).
1375
1376 * The new `lockf' function is a simplified interface to the locking
1377   facilities of `fcntl', included for compatibility.
1378
1379 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1380
1381 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1382
1383 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1384   compatibility.
1385
1386 * The error message printed by `assert' for a failed assertion now includes
1387   the name of the program (if using GNU ld) and the name of the calling
1388   function (with versions of GCC that support this).
1389
1390 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1391
1392 * The library now includes the <sys/mman.h> header file and memory
1393   management functions `mmap', `munmap', `mprotect', `msync', and
1394   `madvise', on systems that support those facilities.
1395
1396 * The interface for `mcheck' has changed slightly: the function called to
1397   abort the program when an allocation inconsistency is detected now takes
1398   an argument that indicates the type of failure.  The new function
1399   `mprobe' lets you request a consistency check for a particular block at
1400   any time (checks are normally done only when you call `free' or `realloc'
1401   on a block).
1402
1403 * It is now possible to easily cross-compile the C library, building on one
1404   system a library to run on another machine and/or operating system.  All
1405   you need to do is set the variable `HOST_CC' in `configparms' to the
1406   native compiler for programs to run on the machine you are building on (a
1407   few generator programs are used on Unix systems); set `CC' to the
1408   cross-compiler.
1409
1410 * The new function `fexecve' (only implemented on the GNU system) executes
1411   a program file given a file descriptor already open on the file.
1412 \f
1413 Version 1.07
1414
1415 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1416   running OSF/1 (alpha-dec-osf1).  He says it is 75% complete.
1417
1418 * You can set the variable `libprefix' in `configparms' to specify a prefix
1419   to be prepended to installed library files; this makes it easy to install
1420   the GNU C library to be linked as `-lgnuc' or whatever.
1421
1422 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1423   copies a limited number of characters from a string, and returns the
1424   address of the last character written.
1425
1426 * You no longer need to check for whether the installed `stddef.h' is
1427   compatible with the GNU C library.  configure now checks for you.
1428
1429 * You can now define a per-stream `fileno' function to convert the
1430   stream's cookie into an integral file descriptor.
1431
1432 * ``malloc (0)'' no longer returns a null pointer.  Instead, it
1433   allocates zero bytes of storage, and returns a unique pointer which
1434   you can pass to `realloc' or `free'.  The behavior is undefined if
1435   you dereference this pointer.
1436
1437 * The C library now runs on Sony NEWS m68k machines running either
1438   NewsOS 3 or NewsOS 4.
1439
1440 * The new `syscall' function is a system-dependent primitive function
1441   for invoking system calls.  It has the canonical behavior on Unix
1442   systems, including unreliable return values for some calls (such as
1443   `pipe', `fork' and `getppid').
1444
1445 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1446   to `EAGAIN', which is the preferred name.  On systems whose kernels
1447   use two distinct codes, the C library now translates EWOULDBLOCK to
1448   EAGAIN in every system call function.
1449 \f
1450 Version 1.06
1451
1452 * The GNU C Library Reference Manual is now distributed with the library.
1453   `make dvi' will produce a DVI file of the printed manual.
1454   `make info' will produce Info files that you can read on line using C-h i
1455   in Emacs or the `info' program.
1456   Please send comments on the manual to bug-glibc-manual@gnu.org.
1457
1458 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1459
1460 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1461
1462 * Jason Merrill has contributed a port to the Sequent Symmetry running
1463   Dynix version 3 (i386-sequent-dynix).
1464
1465 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1466   ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1467
1468 * New function `memory_warnings' lets you arrange to get warnings when
1469   malloc is running out of memory to allocate, like Emacs gives you.
1470
1471 * The C library now contains the relocating allocator used in Emacs 19 for
1472   its editing buffers.  This allocator (ralloc) minimizes allocation
1473   overhead and fragmentation by moving allocated regions around whenever it
1474   needs to.  You always refer to a ralloc'd region with a "handle" (a
1475   pointer to a pointer--an object of type `void **').
1476
1477 * There is a new `printf' format: `%m' gives you the string corresponding
1478   to the error code in `errno'.
1479
1480 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1481   or `%[' conversion, but instead of filling in a fixed-sized buffer you
1482   pass, the `a' modifier says to fill in a `char **' you pass with a
1483   malloc'd string.
1484
1485 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1486   `FNM_CASEFOLD'.  `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1487   name like `foo/bar'.  `FNM_CASEFOLD' says to ignore case in matching.
1488
1489 * `mkstemp' is a traditional Unix function to atomically create and open a
1490   uniquely-named temporary file.
1491 \f
1492 Version 1.05
1493
1494 * The standard location for the file that says what the local timezone is
1495   has changed again.  It is now `/usr/local/etc/localtime' (or more
1496   precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1497
1498 * The distribution no longer contains any files with names longer than 14
1499   characters.
1500
1501 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1502   These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1503
1504 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1505 \f
1506 Version 1.04
1507
1508 * The configuration process has changed quite a bit.  The `configure'
1509   script is now used just like the configuration scripts for other GNU
1510   packages.  The `sysdeps' directory hierarchy is much rearranged.
1511   The file `INSTALL' explains the new scheme in detail.
1512
1513 * The header files no longer need to be processed into ANSI C and
1514   traditional C versions.  There is just one set of files to install, and
1515   it will work with ANSI or old C compilers (including `gcc -traditional').
1516
1517 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1518   MIPS DECStation running Ultrix 4.
1519
1520 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1521   Tom Quinn contributed the initial code.  The GNU C library can NOT yet be
1522   made itself into a shared library.
1523
1524 * Yet further improved support for the i386, running 4.3 BSD-like systems
1525   (such as Mach 3 with the Unix single-server), or System V.
1526
1527 * New function `strncasecmp' to do case-insensitive string comparison
1528   with limited length.
1529
1530 * New function `strsep' is a reentrant alternative to `strtok'.
1531
1532 * New functions `scandir' and `alphasort' for searching directories.
1533
1534 * New function `setenv' is a better interface to `putenv'.
1535
1536 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1537   function for traversing a directory tree.
1538
1539 * The GNU obstack package is now also part of the C library.
1540   The new function `open_obstack_stream' creates a stdio stream that
1541   writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1542   formatted output directly to an obstack.
1543
1544 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1545   cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1546
1547 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1548
1549 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1550   things to your strings.
1551
1552 * There are some new test programs: test-fseek, testmb, and testrand.
1553
1554 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1555   These ports are not finished, but are a good starting place for really
1556   supporting those systems.
1557
1558 * `/etc/localtime' is now the standard location for the file that says what
1559   the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1560   This follows the general principle that `/etc' is the place for all local
1561   configuration files.
1562
1563 * The C library header files now use `extern "C"' when used by the C++
1564   compiler, so the C library should now work with C++ code.
1565
1566 * The header file <bstring.h> is gone.  <string.h> now declares bcopy,
1567   bcmp, bzero, and ffs.  (Update: nowadays these functions are declared
1568   in <strings.h>.)
1569
1570 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1571   function which uses the `merge sort' algorithm, and is said to be
1572   significantly faster than the old GNU `qsort' function.  Merge sort is
1573   now the standard `qsort' function.  The new algorithm can require a lot
1574   of temporary storage; so, the old sorting function is called when the
1575   required storage is not available.
1576
1577 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1578   provides the Unix `crypt' function, plus some other entry points.
1579
1580 * The code and header files taken from 4.4 BSD have been updated with the
1581   latest files released from Berkeley.
1582 \f
1583 ----------------------------------------------------------------------
1584 Copyright information:
1585
1586 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1587         Free Software Foundation, Inc.
1588
1589    Permission is granted to anyone to make or distribute verbatim copies
1590    of this document as received, in any medium, provided that the
1591    copyright notice and this permission notice are preserved,
1592    thus giving the recipient permission to redistribute in turn.
1593
1594    Permission is granted to distribute modified versions
1595    of this document, or of portions of it,
1596    under the above conditions, provided also that they
1597    carry prominent notices stating who last changed them.
1598 \f
1599 Local variables:
1600 version-control: never
1601 End: