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1 GNU C Library NEWS -- history of user-visible changes. 2006-10-11
2 Copyright (C) 1992-2002,2003,2004,2005,2006 Free Software Foundation, Inc.
3 See the end for copying conditions.
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 2.6
10 * New Linux interfaces: epoll_pwait.
12 \f
13 Version 2.5
15 * For Linux, the sorting of addresses returned by getaddrinfo now also
16 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
17 Implemented by Ulrich Drepper.
19 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
20 Implemented by Ulrich Drepper.
22 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
24 * New iconv module for MIK. Contributed by Alexander Shopov.
26 * For sites with broken group and/or passwd database, the auto-propagate
27 option of nscd can prevent creating ID lookup entries from the results
28 of a name lookup and vice versa. This usually is no problem but some
29 site might have problems with the default behavior.
30 Implemented by Ulrich Drepper.
32 * Iterating over entire database in NIS can be slow. With the
33 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
34 to trade time for memory. The entire database will be read at once.
35 Implemented by Ulrich Drepper.
37 * The interfaces introduced in RFC 3542 have been implemented by
38 Ulrich Drepper.
40 * Support for the new ELF hash table format was added by Ulrich Drepper.
42 * Support for priority inheritance mutexes added by Jakub Jelinek and
43 Ulrich Drepper.
45 * Support for priority protected mutexes added by Jakub Jelinek.
47 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
48 or_IN, csb_PL, fy_NL, sr_ME.
49 \f
50 Version 2.4
52 * More overflow detection functions.
54 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
55 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
57 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
58 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
59 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
60 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
61 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
62 by Masahide Washizawa.
64 * It is now possible to install audit libraries for the dynamic linker using
65 LD_AUDIT. Implemented by Ulrich Drepper.
67 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
68 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
69 For a libc and libpthread that works well on Linux 2.4 kernels, we
70 recommend using the stable 2.3 branch.
72 * The new function open_wmemstream acts like open_memstream,
73 but uses a wchar_t wide character buffer.
75 * The new function ppoll is an improved version of poll, similar to pselect.
77 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
78 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
79 renameat, unlinkat, linkat, symlinkat, readlinkat.
81 * New Linux kernel system calls: unshare,
82 inotify_init, inotify_add_watch, inotify_rm_watch.
84 * The euidaccess function is now also known by the alias eaccess,
85 for compatibility with some other systems.
87 * Timezone data updated to 2006b version.
88 \f
89 Version 2.3.6
91 * The following bugs are resolved with this release:
93 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
94 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
95 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
96 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
97 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
98 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
100 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
102 * As of this release, GCC 4 can be used to compile the C Library.
104 * Timezone data updated to 2005m version.
105 \f
106 Version 2.3.5
108 * The following bugs are resolved with this release:
110 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
111 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
112 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
113 777, 787, 821, 822, 823, 825
115 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
116 \f
117 Version 2.3.4
119 * Support for RFC 3678. Real implementations exist only for Linux so far.
120 Implemented by Ulrich Drepper.
122 * nscd can now cache entries persistently. Expiring entries are reloaded.
123 For speedups the cache can be shared in memory with client processes.
124 Implemented by Ulrich Drepper.
126 * nscd can now perform SELinux checks.
127 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
129 * getaddrinfo queries are now cached. Canonical name lookup is performed
130 efficiently.
131 Implemented by Ulrich Drepper.
133 * The nothrow function attribute is used when headers are used by gcc when
134 compiling C code. This can avoid significant amounts of exception
135 handling data.
137 * The malloc functions perform more error checking and are stricter when
138 it comes to reacting on errors. The default action is to terminate
139 the process after showing an error message. Implemented by Ulrich Drepper.
141 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
142 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
144 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
145 namespaces using the new function dlmopen(). This feature is of course,
146 like most other dynamic loading functionality, not available in statically
147 linked applications. Implemented by Ulrich Drepper.
149 * Low-overhead boundary checking variants of string and some stdio functions
150 were added. These are to be used in conjunction with a gcc patch by
151 Jakub Jelinek which adds calls to these functions if possible.
152 Implemented by Jakub Jelinek and Ulrich Drepper.
154 * Old code for several operating systems and machine architectures that
155 have not been in working condition in a long time have been removed from
156 the main source tree maintained by the GNU C Library's maintainers.
157 These files are now reside in the separate `ports' source module
158 that is usable as an add-on when building the library.
159 \f
160 Version 2.3.3
162 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
163 interrogate the dynamic linker, compatible with the Solaris interface.
165 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
166 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
168 * getifaddrs now uses the netlink interface on Linux to get its information.
169 Implemented by Thorsten Kukuk.
171 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
172 Implemented by Ulrich Drepper.
174 * support for non-executable stacks on x86 has been added. Changes mostly
175 by Roland McGrath.
177 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
178 and Ulrich Drepper.
180 * getaddrinfo now performs destination address selection according to
181 RFC 3484.
182 \f
183 Version 2.3.2
185 * Thread-safe interfaces for many functions that access locale data
186 were added in version 2.3, but these features were omitted from NEWS.
187 Many functions have variants with an `_l' suffix that take a `locale_t'
188 object as a parameter rather than consulting the current locale.
189 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
190 create and maintain `locale_t' objects. Additionally, the new function
191 `uselocale' sets "the current locale" (as used by functions not so
192 parameterized) set for an individual thread. These features were added
193 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
195 * The functions getresuid, getresgid, setresuid, and setresgid, which
196 have long been available on Linux, are now declared in <unistd.h>
197 and are now also available on the Hurd.
199 * ELF thread-local storage support (TLS) now works on x86-64.
201 * The new dynamic string token $LIB is expanded in shared library names.
202 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
204 * Aldy Hernandez contributed complete software floating point support for
205 PowerPC machines with no FPU.
207 * fexecve is implemented on Linux.
209 * The `btowc' function should work at least twice as fast due to
210 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
212 * With approriate thread add-ons cancelable functions are now implemented
213 in libc.so as well. No need to call the function in libpthread. This
214 change allowed to finally disable the incorrect and expensive handling
215 of weak definition in ld.so.
217 * Yet more PLT entries in libc.so have been removed. We finally arrived
218 at the bare minimum. Startup times improved appropriately.
220 * Support for the new Linux/x86 system call interface was added. The
221 AT_SYSINFO auxiliary vector entry is recognized and handled.
222 \f
223 Version 2.3
225 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
226 charsets.
228 * iconv (the program and the interface) now accepts empty names (excluding
229 options like //TRANSLIT) to mean "use charset of current locale".
231 * localedef can now transliterate characters in strings which are not in
232 the provided charmap. The information from the input locale is used.
234 * Prelinking support was added for ELF targets. This requires additional
235 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
237 * Read-only stdio streams now use mmap to speed up operation by eliminating
238 copying and buffer underflows. To use add 'm' to the mode string of
239 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
241 * The malloc functions were completely rewritten by Wolfram Gloger based
242 on Doug Lea's malloc-2.7.0.c.
244 * Isamu Hasegawa contributed a completely new and POSIX-conformant
245 implementation of regex.
247 * Bruno Haible upgraded the iconv and locale implementation to support
248 Unicode 3.2.
250 * Contents of the LC_* and LANG environment variables in the CEN style are
251 not recognized anymore. It never was used. Change by Ulrich Drepper.
253 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
254 thread-local storage (TLS) ABI on some platforms.
255 Changes by Ulrich Drepper. SH support by Kaz Kojima.
257 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
258 EUC-JISX0213, and TSCII.
260 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
261 BSD-compatible interface for getting all network interface addresses.
262 Implementation for IPv4 by Roland McGrath.
264 * Loading of locale data is faster due to the introduction of a locale
265 archive. Implemented by Roland McGrath and Ulrich Drepper.
267 * Startup times are significantly reduced by not using exported functions
268 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
269 and Ulrich Drepper.
271 * Steven Munroe contributed a port to PowerPC64/Linux.
272 \f
273 Version 2.2.6
275 * The Hurd now uses the GNU libio implementation of stdio rather than the
276 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
278 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
279 with the same behavior as the Linux system call of the same name.
280 \f
281 Version 2.2.5
283 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
284 128-bit long double format.
286 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
287 IBM1161, and IBM1162 charsets.
289 * Andreas Jaeger contributed a port to x86-64/Linux.
291 * Peter Bruin contributed a port to PowerPC/Hurd.
293 * libc functions using I/O streams now can handle wide-oriented streams
294 as well.
296 * optimizations in the dynamic linker. Binaries created by recent binutils
297 versions start up quicker due to reduced time spent on relocations.
299 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
300 \f
301 Version 2.2.4
303 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
304 asinh, atanh, j0 for the 128-bit long double format.
306 * Bruno Haible updated all the code handling Unicode in some form to
307 support Unicode 3.1.
309 * Speed of regex for single-byte locales is back to previous levels.
310 Patch by Isamu Hasegawa.
312 * Alpha, SPARC, and IA-64 now also using floating stacks.
314 * Startup time of internationalized applications greatly improved through
315 iconv cache. Use iconvconfig to generate the cache file.
316 Contributed by Ulrich Drepper.
318 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
319 severe performance problems. Patch by David Mosberger.
321 * The Hurd port got a lot more functionality like AIO, various stdio
322 extensions, etc. Mainly done by Roland McGrath.
324 * mtrace can now lookup symbols in shared libraries.
325 \f
326 Version 2.2.3
328 * Intel's IA-64 math library is largely integrated. It provides fast and
329 accurate implementatations for most basic and standard math functions
330 in float, double, and long double format.
332 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
333 and asin for the 96-bit long double format and asin, log, tan for the
334 128-bit long double format.
336 * The beginning of a last-bit accurate math library by IBM Haifa were added.
337 The basic double functions exist today. Contributed by Abraham Ziv
338 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
339 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
341 * An asynchronous name lookup library was added. The interface is designed
342 after POSIX AIO. The proposal was circulated beforehand to get comments.
343 No negative ones came in. Implemented by Ulrich Drepper.
345 * Port to S390/64bit contributed by Martin Schwidefsky
346 <schwidefsky@de.ibm.com>.
348 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
349 of functions for Linux/IA-64.
351 * The RPC code is now thread safe. Threads can now use the same service
352 of different services at the same time. Patch by Eric Norum
353 <eric.norum@usask.ca> with some help by Ulrich Drepper.
355 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
356 family of functions for Linux/S390.
358 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
359 of functions for Linux/x86.
361 * Port to Linux/CRIS contributed by Axis Communications.
362 \f
363 Version 2.2.2
365 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
366 we can now check for namespace violations and missing declarations. The
367 result is that almost all headers are now Unix-compliant (as defined in
368 the upcoming XPG6). The negative side is that some programs might need
369 corrections, too, if they depend on the incorrect form of the headers in
370 previous versions which defined too many symbols and included too many
371 other headers.
373 * regex now handles multibyte character sets correctly.
374 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
376 * iconv (the program) does now conform to the upcoming XPG6 and handles
377 charmaps. Instead of the charset names the path of charmaps can be
378 provided and the conversion happens based on this data.
379 Contributed by Ulrich Drepper.
381 * The locale program now provides detailed information about the installed
382 locales. While
384 locale -a
386 only lists the names of the supported locales
388 locale -a --verbose
390 provides details such as country, language, and codeset name.
391 Contributed by Ulrich Drepper.
392 \f
393 Version 2.2.1
395 * The gencat program now parses the input file according to the charset
396 selected by the LC_CTYPE category. This is important for stateful
397 character sets. To make generating catalogs easier there is a way
398 to overwrite the charset selected by the locale: before the first
399 message or $ quote line the catalog can contain a line like
401 $ codeset=ISO-8859-2
403 to select the charset (ISO-8859-2 in this case).
405 Implemented by Shinya Hanataka and Ulrich Drepper.
407 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
408 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
409 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
411 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
412 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
414 * The LANGUAGE environment variable is now ignored unless the locale is
415 changed from the default "C" locale.
417 * The usual bug fixes.
418 \f
419 Version 2.2
421 * Greg McGary added runtime support for bounds checking using gcc's
422 new -fbounded-pointers option. ix86 target is complete. PowerPC
423 is in progress.
425 * Thorsten Kukuk added secure mode support to nscd.
427 * The Berkeley db libraries have been removed.
429 Related, the nss_db module is now in a separate package since it
430 obviously requires a database library being available.
432 * Wide character I/O streams implemented by Ulrich Drepper.
434 * Functions from the extended socket API added by Ulrich Drepper.
436 * Functions feenableexcept and fedisableexcept to control the
437 behaviour of individual exceptions have been added by Andreas Jaeger.
439 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
441 * The resolver code has been updated from bind 8.2.3-T5B which supports
442 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
443 and Mark Kettenis.
445 This change could in some situations effect backward compatibility. Since
446 now `_res' is a thread-local instead of a global variable, modifying it
447 in one thread does not have any effect in other threads.
449 The resolver library was also extended to allow IPv6 as the transport
450 protocol for the requests. This work was done by Stig Venaas.
452 * Compatibility code for K&R C compilers has been removed from the
453 header files. A ISO C compiler is needed to use the library
454 (conforming to either C89 or C99 standard).
456 * Complete rewrite of the localedef program to support multibyte character
457 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
458 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
459 Implemented by Ulrich Drepper.
461 Bruno Haible significantly improved the generation and use of the data
462 structures for the wide character tables.
464 * Plural handling in gettext implemented by Ulrich Drepper.
466 * The utmp daemon has been removed.
468 * The port to MIPS-Linux has been finished by Andreas Jaeger.
470 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
471 and Yutaka Niibe.
473 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
475 * POSIX barriers implemented by Kaz Kylheku.
477 * POSIX spawn function family implemented by Ulrich Drepper.
479 * POSIX spinlocks are now available.
481 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
483 * the configure option --enable-kernel=X.Y.Z allows to strip out
484 compatibility for kernel versions before X.Y.Z. This is currently only
485 implemented for Linux.
487 * the sockaddr_in6 structure changed. The IPv6 working group added a new
488 field sin6_scope_id. This means that all programs using IPv6 should be
489 recompiled. Don't expect binary compatibility with previous glibc
490 versions.
492 * various conversion modules for IBM character sets contributed by
493 Masahide Washizawa.
495 * IA-64 port by Jes Sorensen and HJ Lu.
497 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
498 Compiling the GNU C Library for Linux/ia64
499 ******************************************
501 Please refer to the file INSTALL in the same directory as you found
502 this file for general information about configuring and compiling
503 glibc.
505 For general inquiries about glibc under Linux/ia64 please use the
506 following mailing list linux-ia64@linuxia64.org or one of the relevant
507 glibc mailing lists.
509 Recommended Tools for Compilation
510 =================================
512 In order for glibc-2.2 to build correctly on the ia64 you need at
513 least the following versions of the GNU tools (the :
515 * The Cygnus toolchain snapshot for the ia64 as of August 4
516 including the provided set of patches. It is however recommend
517 you use the October 24 toolchain snapshot or a more recent version.
519 OR alternatively you can try the following (the Cygnus toolchain is
520 the recommended solution):
522 * GCC and binutils, GAS and GNU LD out of CVS from
523 sources.redhat.com as of August 28, 2000 or later. The CVS tree
524 may require special patches to work properly on the ia64.
526 Configuring and compiling GNU Libc for Linux/ia64
527 =================================================
529 The library requires Linux kernel version 2.4.0-test4-000728 or
530 later to funtion properly. Besides that it support for debug libraries
531 is currently untested. Hence the following options
532 are required for configuring the library:
534 --disable-debug --enable-kernel=2.4.0
536 It is also important that you make sure the library picks up the
537 appropriate kernel header files, if you do not have recent enough
538 kernel headers in /usr/src/linux/include, you should use the
539 --with-headers=<path> option to specify the location.
541 As an example I personally use the following options to configure
542 the library:
544 --disable-debug
545 --disable-cvs
546 --enable-kernel=2.4.0
547 --host=ia64-linux
548 --enable-add-ons=yes
549 --prefix=/usr
550 --with-headers=/home/jes/linux/include
553 Good luck
555 Jes Sorensen <jes@linuxcare.com>,
556 November 14th, 2000
557 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
558 \f
559 Version 2.1.3
561 * bug fixes
563 \f
564 Version 2.1.2
566 * bug fixes
568 \f
569 Version 2.1.1
571 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
573 * New xdr functions are added; some rpc functions are now 64bit clean.
575 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
577 * Fixed known incompatibilities with glibc 2.0.
579 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
581 * Optimized a number of functions (especially the ELF dynamic loader).
583 * Update timezone data files.
585 * lots of charmaps corrections
587 * some new locale definitions and charmaps
589 \f
590 Version 2.1
592 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
593 conform to POSIX member type requirements. Symbol versions have been
594 adjusted as needed within the library, and for direct use by applications,
595 but there is potential for problems if third-party libraries use
596 struct timeval as part of their interface. This does not present
597 a problem for X and other "essential" system libraries.
599 * An additional locale model to support C++ Standard Library locale
600 model and probably more was implemented by Ulrich Drepper.
602 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
603 symbol level.
605 * Miles Bader provided the `argp' function family to support hierachical
606 command line argument parsing, layered on top of getopt.
608 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
610 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
611 numbers.
613 * scanf recognizes the %a and %A format for scanning floating point numbers.
615 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
616 information and interfaces for the available integer types.
618 * about 130 new math functions were added to implement the ISO C9x math
619 library.
621 * the new header <complex.h> contains definitions of the complex math
622 functions from ISO C 9X.
624 * the new header <tgmath.h> defines generic macros to use complex or
625 real valued functions.
627 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
629 * Andreas Jaeger provided a test suite for the math library.
631 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
633 * Ulrich Drepper added character set conversion functions (iconv).
635 * Optimized string functions have been added.
637 * The localedata addon is now part of glibc.
639 * An implementation of profiling shared libraries was added by Ulrich Drepper.
641 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
642 daemon for NSS (nscd).
644 Missing a better place here are some numbers on improvements. Under
645 Linux 2.1.125 un-tar-ing the kernel sources takes
647 user system wall
649 using local files 12.19s 6.88s 22.91s
651 using NIS 13.92s 8.91s 26.34s
653 using NIS & nscd 10.37s 7.34s 25.30s
655 using NIS+ 27.57s 30.37s 640.46s
657 using NIS+ & nscd 10.25s 7.83s 26.51s
659 using NIS & old nscd [1] 13.83s 8.32s 29.60s
661 Keep in mind that non-namelookup related operations dominate above times.
662 It was just a common complain that using NIS+ unpacking the kernel is
663 horribly slow.
665 [1] The old nscd implementation is not available anymore since it was
666 distributed with glibc up to version 2.0.98 and thus is now replaced.
668 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
670 * Mark Kettenis provided a Hesiod NSS module.
672 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
673 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
675 * rcmd can now handle netgroups (Dick Streefland).
677 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
678 Bambrough.
680 * Support for the IPv6 protocol has been added to the socket API, as per the
681 latest draft standards.
683 * Support for Linux 2.2 has been added.
685 * Interface changes relative to the latest 2.0.x release:
686 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
687 addseverity NEW: Unix98
688 alphasort64 NEW: LFS
689 argp_err_exit_status NEW: argp, GNU ext
690 argp_error NEW: argp, GNU ext
691 argp_failure NEW: argp, GNU ext
692 argp_help NEW: argp, GNU ext
693 argp_parse NEW: argp, GNU ext
694 argp_program_bug_address NEW: argp, GNU ext
695 argp_program_version NEW: argp, GNU ext
696 argp_program_version_hook NEW: argp, GNU ext
697 argp_state_help NEW: argp, GNU ext
698 argp_usage NEW: argp, GNU ext
699 authdes_create NEW: Secure RPC
700 authdes_getucred NEW: Secure RPC
701 authdes_pk_create NEW: Secure RPC
702 backtrace NEW: GNU ext.
703 backtrace_symbols NEW: GNU ext.
704 backtrace_symbols_fd NEW: GNU ext.
705 cacos NEW: ISO C 9x
706 cacosf NEW: ISO C 9x
707 cacosh NEW: ISO C 9x
708 cacoshf NEW: ISO C 9x
709 cacoshl NEW: ISO C 9x
710 cacosl NEW: ISO C 9x
711 capget NEW: kernel
712 capset NEW: kernel
713 carg NEW: ISO C 9x
714 cargf NEW: ISO C 9x
715 cargl NEW: ISO C 9x
716 casin NEW: ISO C 9x
717 casinf NEW: ISO C 9x
718 casinh NEW: ISO C 9x
719 casinhf NEW: ISO C 9x
720 casinhl NEW: ISO C 9x
721 casinl NEW: ISO C 9x
722 catan NEW: ISO C 9x
723 catanf NEW: ISO C 9x
724 catanh NEW: ISO C 9x
725 catanhf NEW: ISO C 9x
726 catanhl NEW: ISO C 9x
727 catanl NEW: ISO C 9x
728 cbc_crypt NEW: Secure RPC
729 ccos NEW: ISO C 9x
730 ccosf NEW: ISO C 9x
731 ccosh NEW: ISO C 9x
732 ccoshf NEW: ISO C 9x
733 ccoshl NEW: ISO C 9x
734 ccosl NEW: ISO C 9x
735 cexp NEW: ISO C 9x
736 cexpf NEW: ISO C 9x
737 cexpl NEW: ISO C 9x
738 cimag NEW: ISO C 9x
739 cimagf NEW: ISO C 9x
740 cimagl NEW: ISO C 9x
741 clearerr_locked REMOVED
742 clntunix_create NEW: sunrpc ext
743 clog NEW: ISO C 9x
744 clog10 NEW: ISO C 9x
745 clog10f NEW: ISO C 9x
746 clog10l NEW: ISO C 9x
747 clogf NEW: ISO C 9x
748 clogl NEW: ISO C 9x
749 conj NEW: ISO C 9x
750 conjf NEW: ISO C 9x
751 conjl NEW: ISO C 9x
752 cpow NEW: ISO C 9x
753 cpowf NEW: ISO C 9x
754 cpowl NEW: ISO C 9x
755 cproj NEW: ISO C 9x
756 cprojf NEW: ISO C 9x
757 cprojl NEW: ISO C 9x
758 creal NEW: ISO C 9x
759 crealf NEW: ISO C 9x
760 creall NEW: ISO C 9x
761 creat64 NEW: LFS
762 csin NEW: ISO C 9x
763 csinf NEW: ISO C 9x
764 csinh NEW: ISO C 9x
765 csinhf NEW: ISO C 9x
766 csinhl NEW: ISO C 9x
767 csinl NEW: ISO C 9x
768 csqrt NEW: ISO C 9x
769 csqrtf NEW: ISO C 9x
770 csqrtl NEW: ISO C 9x
771 ctan NEW: ISO C 9x
772 ctanf NEW: ISO C 9x
773 ctanh NEW: ISO C 9x
774 ctanhf NEW: ISO C 9x
775 ctanhl NEW: ISO C 9x
776 ctanl NEW: ISO C 9x
777 des_setparity NEW: Secure RPC
778 ecb_crypt NEW: Secure RPC
779 endutxent NEW: Unix98
780 exp10 NEW: ISO C 9x
781 exp10f NEW: ISO C 9x
782 exp10l NEW: ISO C 9x
783 exp2 NEW: ISO C 9x
784 exp2f NEW: ISO C 9x
785 exp2l NEW: ISO C 9x
786 fattach NEW: STREAMS
787 fdetach NEW: STREAMS
788 fdim NEW: ISO C 9x
789 fdimf NEW: ISO C 9x
790 fdiml NEW: ISO C 9x
791 feclearexcept NEW: ISO C 9x
792 fegetenv NEW: ISO C 9x
793 fegetexceptflag NEW: ISO C 9x
794 fegetround NEW: ISO C 9x
795 feholdexcept NEW: ISO C 9x
796 feof_locked REMOVED
797 feraiseexcept NEW: ISO C 9x
798 ferror_locked REMOVED
799 fesetenv NEW: ISO C 9x
800 fesetexceptflag NEW: ISO C 9x
801 fesetround NEW: ISO C 9x
802 fetestexcept NEW: ISO C 9x
803 feupdateenv NEW: ISO C 9x
804 fflush_locked REMOVED
805 ffsl NEW: GNU ext.
806 ffsll NEW: GNU ext.
807 fgetpos64 NEW: LFS
808 fgets_unlocked NEW: GNU ext.
809 fileno_locked REMOVED
810 fma NEW: ISO C 9x
811 fmaf NEW: ISO C 9x
812 fmal NEW: ISO C 9x
813 fmax NEW: ISO C 9x
814 fmaxf NEW: ISO C 9x
815 fmaxl NEW: ISO C 9x
816 fmin NEW: ISO C 9x
817 fminf NEW: ISO C 9x
818 fminl NEW: ISO C 9x
819 fmtmsg NEW: Unix98
820 fopen64 NEW: LFS
821 fputc_locked REMOVED
822 fputs_unlocked NEW: GNU ext.
823 fread_unlocked NEW: GNU ext.
824 freopen64 NEW: LFS
825 fseeko NEW: Unix98
826 fsetpos64 NEW: LFS
827 fstatfs64 NEW: LFS
828 fstatvfs NEW: Unix98
829 fstatvfs64 NEW: LFS
830 ftello NEW: Unix98
831 ftello64 NEW: LFS
832 ftruncate64 NEW: LFS
833 ftw64 NEW: LFS
834 fwrite_unlocked NEW: GNU ext.
835 gai_strerror NEW: IPv6
836 gamma_r REMOVED
837 gammaf_r REMOVED
838 gammal_r REMOVED
839 getchar_locked REMOVED
840 getdate NEW: Unix98
841 getdate_err NEW: Unix98
842 getdate_r NEW: GNU ext.
843 getmsg NEW: STREAMS
844 getnameinfo NEW: IPv6
845 getnetname NEW: Secure RPC
846 getpmsg NEW: STREAMS
847 getpt NEW: Unix98 PTY
848 getrlimit64 NEW: LFS
849 getutxent NEW: Unix98
850 getutxid NEW: Unix98
851 getutxline NEW: Unix98
852 glob64 NEW: GNU ext.
853 globfree64 NEW: GNU ext.
854 gnu_get_libc_release NEW: GNU ext.
855 gnu_get_libc_version NEW: GNU ext.
856 grantpt NEW: Unix98 PTY
857 host2netname NEW: Secure RPC
858 iconv NEW: iconv
859 iconv_close NEW: iconv
860 iconv_open NEW: iconv
861 if_freenameindex NEW: IPv6
862 if_indextoname NEW: IPv6
863 if_nameindex NEW: IPv6
864 if_nametoindex NEW: IPv6
865 in6addr_any NEW: IPv6
866 in6addr_loopback NEW: IPv6
867 inet6_isipv4mapped NEW: IPv6
868 isastream NEW: STREAMS
869 iswblank NEW: GNU ext.
870 key_decryptsession NEW: Secure RPC
871 key_decryptsession_pk NEW: Secure RPC
872 key_encryptsession NEW: Secure RPC
873 key_encryptsession_pk NEW: Secure RPC
874 key_gendes NEW: Secure RPC
875 key_get_conv NEW: Secure RPC
876 key_secretkey_is_set NEW: Secure RPC
877 key_setnet NEW: Secure RPC
878 key_setsecret NEW: Secure RPC
879 llrint NEW: ISO C 9x
880 llrintf NEW: ISO C 9x
881 llrintl NEW: ISO C 9x
882 llround NEW: ISO C 9x
883 llroundf NEW: ISO C 9x
884 llroundl NEW: ISO C 9x
885 log2 NEW: ISO C 9x
886 log2f NEW: ISO C 9x
887 log2l NEW: ISO C 9x
888 lrint NEW: ISO C 9x
889 lrintf NEW: ISO C 9x
890 lrintl NEW: ISO C 9x
891 lround NEW: ISO C 9x
892 lroundf NEW: ISO C 9x
893 lroundl NEW: ISO C 9x
894 lseek64 NEW: LFS
895 makecontext NEW: Unix98
896 mempcpy NEW: GNU ext.
897 mmap64 NEW: LFS
898 moncontrol REMOVED
899 modify_ldt NEW: kernel
900 nan NEW: ISO C 9x
901 nanf NEW: ISO C 9x
902 nanl NEW: ISO C 9x
903 nearbyint NEW: ISO C 9x
904 nearbyintf NEW: ISO C 9x
905 nearbyintl NEW: ISO C 9x
906 netname2host NEW: Secure RPC
907 netname2user NEW: Secure RPC
908 nexttoward NEW: ISO C 9x
909 nexttowardf NEW: ISO C 9x
910 nexttowardl NEW: ISO C 9x
911 nftw NEW: Unix98
912 nftw64 NEW: LFS
913 open64 NEW: LFS
914 passwd2des NEW: Secure RPC
915 pow10 NEW: GNU ext.
916 pow10f NEW: GNU ext.
917 pow10l NEW: GNU ext.
918 pread NEW: Unix98
919 pread64 NEW: LFS
920 printf_size NEW: GNU ext.
921 printf_size_info NEW: GNU ext.
922 profil_counter REMOVED
923 pthread_mutexattr_getkind_np REPLACED
924 pthread_mutexattr_setkind_np REPLACED
925 ptsname NEW: Unix98 PTY
926 ptsname_r NEW: Unix98 PTY
927 putc_locked REMOVED
928 putchar_locked REMOVED
929 putgrent NEW: GNU ext.
930 putmsg NEW: STREAMS
931 putpmsg NEW: STREAMS
932 pututxline NEW: Unix98
933 pwrite NEW: Unix98
934 pwrite64 NEW: LFS
935 readdir64 NEW: LFS
936 readdir64_r NEW: LFS
937 remquo NEW: ISO C 9x
938 remquof NEW: ISO C 9x
939 remquol NEW: ISO C 9x
940 round NEW: ISO C 9x
941 roundf NEW: ISO C 9x
942 roundl NEW: ISO C 9x
943 rtime NEW: GNU ext.
944 scalbln NEW: ISO C 9x
945 scalblnf NEW: ISO C 9x
946 scalblnl NEW: ISO C 9x
947 scandir64 NEW: LFS
948 sendfile NEW: kernel
949 setcontext NEW: Unix98
950 setrlimit64 NEW: LFS
951 setutxent NEW: Unix98
952 sighold NEW: Unix98
953 sigignore NEW: Unix98
954 sigqueue NEW: POSIX.1b
955 sigrelse NEW: Unix98
956 sigset NEW: POSIX.1b
957 sigtimedwait NEW: POSIX.1b
958 sigwaitinfo NEW: POSIX.1b
959 sincos NEW: GNU ext.
960 sincosf NEW: GNU ext.
961 sincosl NEW: GNU ext.
962 statfs64 NEW: LFS
963 statvfs NEW: Unix98
964 statvfs64 NEW: LFS
965 strcasestr NEW: GNU ext.
966 strtoimax NEW: ISO C 9x
967 strtoumax NEW: ISO C 9x
968 strverscmp NEW: GNU ext.
969 svcauthdes_stats NEW: Secure RPC
970 svcunix_create NEW: sunrpc etx
971 svcunixfd_create NEW: sunrpc ext
972 swapcontext NEW: Unix98
973 tcgetsid NEW: Unix98 PTY
974 tdestroy NEW: GNU ext.
975 tgamma NEW: ISO C 9x
976 tgammaf NEW: ISO C 9x
977 tgammal NEW: ISO C 9x
978 tmpfile64 NEW: LFS
979 trunc NEW: ISO C 9x
980 truncate64 NEW: LFS
981 truncf NEW: ISO C 9x
982 truncl NEW: ISO C 9x
983 umount2 NEW: kernel
984 unlockpt NEW: Unix98 PTY
985 updwtmpx NEW: Unix98
986 user2netname NEW: Secure RPC
987 utmpxname NEW: Unix98
988 versionsort NEW: GNU ext.
989 versionsort64 NEW: GNU ext.
990 waitid NEW: Unix98
991 wcscasecmp NEW: GNU ext.
992 wcsncasecmp NEW: GNU ext.
993 wcsnlen NEW: GNU ext.
994 wcstoimax NEW: ISO C 9x
995 wcstoll NEW: ISO C 9x
996 wcstoull NEW: ISO C 9x
997 wcstoumax NEW: ISO C 9x
998 wcswcs NEW: Unix98
999 wordexp NEW: POSIX.2
1000 wordfree NEW: POSIX.2
1001 write_profiling REMOVED
1002 xdecrypt NEW: Secure RPC
1003 xdr_authdes_cred NEW: Secure RPC
1004 xdr_authdes_verf NEW: Secure RPC
1005 xdr_cryptkeyarg NEW: Secure RPC
1006 xdr_cryptkeyarg2 NEW: Secure RPC
1007 xdr_cryptkeyres NEW: Secure RPC
1008 xdr_getcredres NEW: Secure RPC
1009 xdr_key_netstarg NEW: Secure RPC
1010 xdr_key_netstres NEW: Secure RPC
1011 xdr_keybuf NEW: Secure RPC
1012 xdr_keystatus NEW: Secure RPC
1013 xdr_netnamestr NEW: Secure RPC
1014 xdr_sizeof NEW: Secure RPC
1015 xdr_unixcred NEW: sunrpc ext
1016 xencrypt NEW: Secure RPC
1017 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1018 \f
1019 Version 2.0.6
1021 * more bug fixes
1023 \f
1024 Version 2.0.5
1026 * more bug fixes
1028 * inet_ntoa is thread-safe
1030 * updwtmp is moved from libutil to libc
1032 * rewrite of cbrt function
1034 * update of timezone data
1035 \f
1036 Version 2.0.4
1038 * more bug fixes
1039 \f
1040 Version 2.0.3
1042 * more bug fixes
1043 \f
1044 Version 2.0.2
1046 * more bug fixes
1048 * add atoll function
1050 * fix complex problems in Berkeley DB code
1052 * fix math functions
1053 \f
1054 Version 2.0.1
1056 * fixed lots of header problems (especially Linux/GNU specific)
1058 * dynamic loader preserves all registers
1060 * Roland McGrath provided support for handling of auxiliary objects in
1061 the ELF dynamic loader.
1063 * support for parallel builds is improved
1064 \f
1065 Version 2.0
1067 * GNU extensions are no longer declared by default. To enable them you
1068 must define the macro `_GNU_SOURCE' in your program or compile with
1069 `-D_GNU_SOURCE'.
1071 * The library has changed from using GNU ld symbol aliases to using weak
1072 symbols where available. The ELF object file format supports weak
1073 symbols; GNU ld also supports weak symbols in the a.out format. (There
1074 is also now support for other GNU ld extensions in ELF. Use the
1075 `--with-elf' option to configure to indicate you have ELF, and
1076 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1077 of many files which contained only symbol aliases, reducing the size of
1078 the source and the compiled library; many other files were renamed to
1079 less cryptic names previously occupied by the symbol alias files.
1080 There is a new header file <elf.h> for programs which operate on
1081 files in the ELF format.
1083 * Converted to Autoconf version 2, so `configure' has more options.
1084 Run `configure --help' to see the details.
1086 * The library can now be configured to build profiling, highly-optimized
1087 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1088 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1089 `configure' enable building these extra libraries. The shared library is
1090 built by default when using both ELF and GNU ld. When shared libraries
1091 are enabled, the new library `-ldl' is available for arbitrary run-time
1092 loading of shared objects; its interface is defined in <dlfcn.h>. The
1093 new header file <link.h> gives access to the internals of the run-time
1094 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1095 application of same name on other systems and it provides information
1096 about dynamically linked binaries.
1098 * The C library now provides the run-time support code for profiling
1099 executables compiled with `-pg'. Programs can control the profiling code
1100 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1101 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1102 the support for this file format was contributed by David Mosberger-Tang.
1104 * The math code has been replaced with a math library based on fdlibm from
1105 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1106 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1107 functions. The math functions now reside in a separate library, so
1108 programs using them will need to use `-lm' their linking commands.
1110 * John C. Bowman contributed optimized ix87 assembler inline functions.
1112 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1113 mechanism similar to that found in Solaris 2. This is now used for the
1114 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1115 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1116 file controls what services are used for each individual database. This
1117 works by loading shared libraries with names specified in `nsswitch.conf',
1118 so service modules can be changed or added at any time without even
1119 relinking any program. Currently there are the file, db, and NIS based
1120 NSS services available.
1122 * The new functions `strtoq' and `strtouq' parse integer values from
1123 strings, like `strtol' and `strtoul', but they return `long long int' and
1124 `unsigned long long int' values, respectively (64-bit quantities).
1126 * The new functions `strtof' and `strtold' parse floating-point values from
1127 strings, like `strtod', but they return `float' and `long double' values,
1128 respectively (on some machines `double' and `long double' are the same).
1130 * Ulrich Drepper has contributed new implementations of the floating-point
1131 printing and reading code used in the `printf' family of functions and
1132 `strtod', `strtof', and `strtold'. These new functions are perfectly
1133 accurate, and much faster than the old ones.
1135 * The implementation of the POSIX locale model was completely rewritten by
1136 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1137 to compile the POSIX locale definition.
1139 * The former dummy implementations of the strcoll and strxfrm function are
1140 now replaced by fully functional code contributed by Ulrich Drepper. The
1141 collation information comes from the POSIX locale definitions.
1143 * The new header <langinfo.h> defines an interface for accessing
1144 various locale-dependent data (using the locale chosen with `setlocale').
1146 * Ulrich Drepper has contributed a new suite of functions for operation on
1147 wide-character and multibyte-character strings, in <wchar.h>;
1148 and classification and case conversion of wide characters, in <wctype.h>.
1149 These new functions are conforming to the ISO C, Amendement 1 specification.
1151 * There is now a second implementation of the standard I/O library available.
1152 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1153 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1155 * You can now use positional parameter specifications in format strings
1156 for the `printf' and `scanf' families of functions. For example,
1157 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1158 ``Number 6, Mr Jones''. This is mainly useful when providing different
1159 format strings for different languages, whose grammars may dictate
1160 different orderings of the values being printed. To support this
1161 feature, the interface for `register_printf_handler' has changed; see
1162 the header file <printf.h> for details.
1164 * The `printf' and `scanf' families of functions now understand a new
1165 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1166 to group numbers as indicated by the locale; for `scanf' and friends, this
1167 says to accept as valid only a number with all the proper grouping
1168 separators in the right places. In the default "C" locale, numbers are
1169 not grouped; but locales for specific countries will define the usual
1170 conventions (i.e. separate thousands with `,' in the US locale).
1172 * The pgrp functions have been regularized, slightly incompatibly but much
1173 less confusingly. The core functions are now `getpgid' and `setpgid',
1174 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1175 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1176 provided for compatibility. There is no longer an incompatible `getpgrp'
1177 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1179 * The new header file <fts.h> and suite of functions simplify programs that
1180 operate on directory trees. This code comes from 4.4 BSD.
1182 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1183 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1184 NSS scheme used in glibc.
1186 * There is a new malloc debugging hook `__memalign_hook'.
1188 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1189 `unsigned int' in <sys/types.h>. These are for compatibility only and
1190 their use is discouraged.
1192 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1193 done differently, so that it works even without GNU ld.
1195 * New function `euidaccess' checks allowed access to a file like `access',
1196 but using the effective IDs instead of the real IDs.
1198 * The time zone data files have been updated for the latest and greatest
1199 local time conventions of the countries of the world.
1201 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1202 see <dirent.h>.
1204 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1205 for formatting floating-point numbers. They are provided only for
1206 compatibility; new programs should use `sprintf' instead. There are
1207 also equivalent function for the `long double' floating-point type and
1208 all functions also exist in a reentrant form.
1210 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1211 functions for maintaining the login-record files (primarily of use to
1212 system programs such as `login'), and convenient functions for
1213 allocating and initializing a pseudo-terminal (pty) device.
1215 * Ulrich Drepper has contributed new support for System V style
1216 shared memory and IPC on systems that support it.
1218 * Ulrich Drepper has contributed several miscellaneous new functions found
1219 in System V: The `hsearch' family of functions provide an effective
1220 implementation of hash tables; `a64l' and `l64a' provide a very simple
1221 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1222 number generator.
1224 * Ulrich Drepper has contributed new reentrant counterparts for the
1225 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1227 * Ulrich Drepper has contributed new, highly-optimized versions of several
1228 string functions for the i486/Pentium family of processors.
1230 * Ulrich Drepper has updated the Linux-specific code, based largely
1231 on work done in Hongjiu Lu's version of GNU libc for Linux.
1232 The GNU library now supports Linux versions 2.0.10 and later,
1233 using the ELF object file format (i[3456]86-*-linux).
1235 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1237 * David Mosberger-Tang and Richard Henderson have ported the C library
1238 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1239 dynamic linking support for ELF/Alpha.
1241 * Richard Henderson contributed several Alpha optimized assembler function
1242 for arithmetic and string handling.
1244 * Ulrich Drepper has contributed a new set of message catalog functions to
1245 support multiple languages using the <libintl.h> interface, for use with
1246 his new package GNU gettext. Translation volunteers have contributed
1247 catalogs of the library's messages in Spanish, German, and Korean.
1249 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1250 program and the `catgets' function for reading the catalog files it
1251 creates. (The <libintl.h> interface is preferred; we include the
1252 <nl_types.h> interface using `catgets' only for source compatibility with
1253 programs already written to use it.)
1255 * New header file <values.h> gives SVID-compatible names for <limits.h>
1256 constants.
1258 * Various new macros, declarations, and small header files for compatibility
1259 with 4.4 BSD.
1261 * New function `group_member' is a convenient way to check if a process has
1262 a given effective group ID.
1264 * When using GCC 2.7 and later, the socket functions are now declared in a
1265 special way so that passing an argument of type `struct sockaddr_in *',
1266 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1267 `struct sockaddr *' type, does not generate a type-clash warning.
1269 * New function `error' declared in header file <error.h> is a convenient
1270 function for printing error messages and optionally exiting; this is the
1271 canonical function used in GNU programs. The new functions `err', `warn',
1272 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1273 doing the same thing.
1275 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1276 POSIX.2 `glob' function to do ~ and {...} expansion.
1278 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1279 `clearenv' which is used in POSIX.9 is also available.
1281 * New function `getsid' returns session ID number on systems that support it.
1283 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1284 files <db.h> and <mpool.h> provide a rich set of functions for several
1285 types of simple databases stored in memory and in files, and <ndbm.h> is
1286 an old `ndbm'-compatible interface using the `db' functions. Link with
1287 `-ldb' to get these functions.
1289 * New macro `strdupa' copies a string like `strdup', but uses local stack
1290 space from `alloca' instead of dynamic heap space from `malloc'.
1292 * New function `strnlen' is like `strlen' but searches only a given maximum
1293 number of characters for the null terminator. `stpncpy', `strndup' and
1294 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1295 function.
1297 * New function `statfs' in header <sys/statfs.h>.
1299 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1300 provide convenient functions for operating on blocks of null-terminated
1301 strings.
1303 * A new suite of functions in <utmp.h> handle all the details of reading
1304 and writing the utmp file.
1306 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1307 Thorsten Kukuk.
1309 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1310 completely POSIX compliant and also implemented the extended functionality
1311 to handle alternate digit representation and alternate era date formats.
1313 * Ulrich Drepper provided an implementation of the `strptime' function
1314 defined in XPG4.2 which transforms a string into a `struct tm' value.
1316 * Paul Eggert provided the tzselect shell script as part of the timezone
1317 code. The shell script makes it easy to select the correct timezone
1318 specification.
1320 * The implementation of the malloc family of functions is completely replaced
1321 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1322 The implementation uses the mmap function (if available) and it is
1323 optimized for the use in multi threaded programs.
1325 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1326 functions. This new functionality is usable by specifying a special
1327 salt string and it is compatible with implementation on *BSD systems.
1329 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1330 `getsubopt' to handle second level command line options, `bsd_signal'
1331 to access BSD style `signal' functionality, the obsolete `regexp' style
1332 expression matcher.
1334 * the `lchown' function is available on system which support this
1335 functionality.
1337 * The implementation of the shadow password handling function was contributed
1338 by Ulrich Drepper.
1340 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1342 * POSIX.1g support was added. The <sys/select.h> header is available,
1343 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1344 implementation of `getaddrinfo'.
1345 \f
1346 Version 1.09
1348 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1350 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1351 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1353 * The new function `daemon' from 4.4 BSD is useful for server programs that
1354 want to put themselves in the background.
1356 * Joel Sherrill has contributed support for several standalone boards that
1357 run without an operating system.
1359 * `printf', `scanf' and friends now accept a `q' type modifier for long
1360 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1362 * All of the code taken from BSD (notably most of the math and networking
1363 routines) has been updated from the BSD 4.4-Lite release.
1365 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1367 * The new functions `getdomainname' and `setdomainname' fetch or change the
1368 YP/NIS domain name. These are system calls which exist on systems which
1369 have YP (aka NIS).
1371 * The time zone data files have been updated for the latest international
1372 conventions.
1374 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1375 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1376 \f
1377 Version 1.08
1379 * The C library now includes support for Sun RPC, from Sun's free
1380 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1381 are included. (There is still no support for YP.)
1383 * Tom Quinn has contributed a port of the C library to SGI machines running
1384 Irix 4 (mips-sgi-irix4).
1386 * The new `lockf' function is a simplified interface to the locking
1387 facilities of `fcntl', included for compatibility.
1389 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1391 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1393 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1394 compatibility.
1396 * The error message printed by `assert' for a failed assertion now includes
1397 the name of the program (if using GNU ld) and the name of the calling
1398 function (with versions of GCC that support this).
1400 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1402 * The library now includes the <sys/mman.h> header file and memory
1403 management functions `mmap', `munmap', `mprotect', `msync', and
1404 `madvise', on systems that support those facilities.
1406 * The interface for `mcheck' has changed slightly: the function called to
1407 abort the program when an allocation inconsistency is detected now takes
1408 an argument that indicates the type of failure. The new function
1409 `mprobe' lets you request a consistency check for a particular block at
1410 any time (checks are normally done only when you call `free' or `realloc'
1411 on a block).
1413 * It is now possible to easily cross-compile the C library, building on one
1414 system a library to run on another machine and/or operating system. All
1415 you need to do is set the variable `HOST_CC' in `configparms' to the
1416 native compiler for programs to run on the machine you are building on (a
1417 few generator programs are used on Unix systems); set `CC' to the
1418 cross-compiler.
1420 * The new function `fexecve' (only implemented on the GNU system) executes
1421 a program file given a file descriptor already open on the file.
1422 \f
1423 Version 1.07
1425 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1426 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1428 * You can set the variable `libprefix' in `configparms' to specify a prefix
1429 to be prepended to installed library files; this makes it easy to install
1430 the GNU C library to be linked as `-lgnuc' or whatever.
1432 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1433 copies a limited number of characters from a string, and returns the
1434 address of the last character written.
1436 * You no longer need to check for whether the installed `stddef.h' is
1437 compatible with the GNU C library. configure now checks for you.
1439 * You can now define a per-stream `fileno' function to convert the
1440 stream's cookie into an integral file descriptor.
1442 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1443 allocates zero bytes of storage, and returns a unique pointer which
1444 you can pass to `realloc' or `free'. The behavior is undefined if
1445 you dereference this pointer.
1447 * The C library now runs on Sony NEWS m68k machines running either
1448 NewsOS 3 or NewsOS 4.
1450 * The new `syscall' function is a system-dependent primitive function
1451 for invoking system calls. It has the canonical behavior on Unix
1452 systems, including unreliable return values for some calls (such as
1453 `pipe', `fork' and `getppid').
1455 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1456 to `EAGAIN', which is the preferred name. On systems whose kernels
1457 use two distinct codes, the C library now translates EWOULDBLOCK to
1458 EAGAIN in every system call function.
1459 \f
1460 Version 1.06
1462 * The GNU C Library Reference Manual is now distributed with the library.
1463 `make dvi' will produce a DVI file of the printed manual.
1464 `make info' will produce Info files that you can read on line using C-h i
1465 in Emacs or the `info' program.
1466 Please send comments on the manual to bug-glibc-manual@gnu.org.
1468 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1470 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1472 * Jason Merrill has contributed a port to the Sequent Symmetry running
1473 Dynix version 3 (i386-sequent-dynix).
1475 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1476 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1478 * New function `memory_warnings' lets you arrange to get warnings when
1479 malloc is running out of memory to allocate, like Emacs gives you.
1481 * The C library now contains the relocating allocator used in Emacs 19 for
1482 its editing buffers. This allocator (ralloc) minimizes allocation
1483 overhead and fragmentation by moving allocated regions around whenever it
1484 needs to. You always refer to a ralloc'd region with a "handle" (a
1485 pointer to a pointer--an object of type `void **').
1487 * There is a new `printf' format: `%m' gives you the string corresponding
1488 to the error code in `errno'.
1490 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1491 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1492 pass, the `a' modifier says to fill in a `char **' you pass with a
1493 malloc'd string.
1495 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1496 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1497 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1499 * `mkstemp' is a traditional Unix function to atomically create and open a
1500 uniquely-named temporary file.
1501 \f
1502 Version 1.05
1504 * The standard location for the file that says what the local timezone is
1505 has changed again. It is now `/usr/local/etc/localtime' (or more
1506 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1508 * The distribution no longer contains any files with names longer than 14
1509 characters.
1511 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1512 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1514 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1515 \f
1516 Version 1.04
1518 * The configuration process has changed quite a bit. The `configure'
1519 script is now used just like the configuration scripts for other GNU
1520 packages. The `sysdeps' directory hierarchy is much rearranged.
1521 The file `INSTALL' explains the new scheme in detail.
1523 * The header files no longer need to be processed into ANSI C and
1524 traditional C versions. There is just one set of files to install, and
1525 it will work with ANSI or old C compilers (including `gcc -traditional').
1527 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1528 MIPS DECStation running Ultrix 4.
1530 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1531 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1532 made itself into a shared library.
1534 * Yet further improved support for the i386, running 4.3 BSD-like systems
1535 (such as Mach 3 with the Unix single-server), or System V.
1537 * New function `strncasecmp' to do case-insensitive string comparison
1538 with limited length.
1540 * New function `strsep' is a reentrant alternative to `strtok'.
1542 * New functions `scandir' and `alphasort' for searching directories.
1544 * New function `setenv' is a better interface to `putenv'.
1546 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1547 function for traversing a directory tree.
1549 * The GNU obstack package is now also part of the C library.
1550 The new function `open_obstack_stream' creates a stdio stream that
1551 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1552 formatted output directly to an obstack.
1554 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1555 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1557 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1559 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1560 things to your strings.
1562 * There are some new test programs: test-fseek, testmb, and testrand.
1564 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1565 These ports are not finished, but are a good starting place for really
1566 supporting those systems.
1568 * `/etc/localtime' is now the standard location for the file that says what
1569 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1570 This follows the general principle that `/etc' is the place for all local
1571 configuration files.
1573 * The C library header files now use `extern "C"' when used by the C++
1574 compiler, so the C library should now work with C++ code.
1576 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1577 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1578 in <strings.h>.)
1580 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1581 function which uses the `merge sort' algorithm, and is said to be
1582 significantly faster than the old GNU `qsort' function. Merge sort is
1583 now the standard `qsort' function. The new algorithm can require a lot
1584 of temporary storage; so, the old sorting function is called when the
1585 required storage is not available.
1587 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1588 provides the Unix `crypt' function, plus some other entry points.
1590 * The code and header files taken from 4.4 BSD have been updated with the
1591 latest files released from Berkeley.
1592 \f
1593 ----------------------------------------------------------------------
1594 Copyright information:
1596 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1597 Free Software Foundation, Inc.
1599 Permission is granted to anyone to make or distribute verbatim copies
1600 of this document as received, in any medium, provided that the
1601 copyright notice and this permission notice are preserved,
1602 thus giving the recipient permission to redistribute in turn.
1604 Permission is granted to distribute modified versions
1605 of this document, or of portions of it,
1606 under the above conditions, provided also that they
1607 carry prominent notices stating who last changed them.
1608 \f
1609 Local variables:
1610 version-control: never
1611 End: