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1 GNU C Library NEWS -- history of user-visible changes. 2007-11-06
2 Copyright (C) 1992-2006, 2007 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 2.8
10 * New locales: bo_CN, bo_IN.
11 \f
12 Version 2.7
14 * More checking functions: fread, fread_unlocked, open*, mq_open.
15 Implemented by Jakub Jelinek and Ulrich Drepper.
17 * Extend fortification to C++. Implemented by Jakub Jelinek.
19 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
20 by not recognizing 'a' as a modifier when those specs are requested.
21 Implemented by Jakub Jelinek.
23 * PPC optimizations to math and string functions.
24 Implemented by Steven Munroe.
26 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
27 options to be passed. Implemented by Ulrich Drepper.
29 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
31 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
32 Implemented by Ulrich Drepper.
34 * Handle private futexes in the NPTL implementation.
35 Implemented by Jakub Jelinek and Ulrich Drepper.
37 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
38 Implemented by Roland McGrath and Ulrich Drepper.
40 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
42 * SHA-256 and SHA-512 based password encryption.
43 Implemented by Ulrich Drepper.
45 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
46 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
47 yo_NG.
49 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
50 Implemented by Ulrich Drepper.
51 \f
52 Version 2.6
54 * New Linux interfaces: epoll_pwait, sched_getcpu.
56 * New generic interfaces: strerror_l.
58 * nscd can now cache the services database. Implemented by Ulrich Drepper.
60 \f
61 Version 2.5
63 * For Linux, the sorting of addresses returned by getaddrinfo now also
64 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
65 Implemented by Ulrich Drepper.
67 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
68 Implemented by Ulrich Drepper.
70 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
72 * New iconv module for MIK. Contributed by Alexander Shopov.
74 * For sites with broken group and/or passwd database, the auto-propagate
75 option of nscd can prevent creating ID lookup entries from the results
76 of a name lookup and vice versa. This usually is no problem but some
77 site might have problems with the default behavior.
78 Implemented by Ulrich Drepper.
80 * Iterating over entire database in NIS can be slow. With the
81 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
82 to trade time for memory. The entire database will be read at once.
83 Implemented by Ulrich Drepper.
85 * The interfaces introduced in RFC 3542 have been implemented by
86 Ulrich Drepper.
88 * Support for the new ELF hash table format was added by Ulrich Drepper.
90 * Support for priority inheritance mutexes added by Jakub Jelinek and
91 Ulrich Drepper.
93 * Support for priority protected mutexes added by Jakub Jelinek.
95 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
96 or_IN, csb_PL, fy_NL, sr_ME.
97 \f
98 Version 2.4
100 * More overflow detection functions.
102 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
103 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
105 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
106 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
107 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
108 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
109 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
110 by Masahide Washizawa.
112 * It is now possible to install audit libraries for the dynamic linker using
113 LD_AUDIT. Implemented by Ulrich Drepper.
115 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
116 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
117 For a libc and libpthread that works well on Linux 2.4 kernels, we
118 recommend using the stable 2.3 branch.
120 * The new function open_wmemstream acts like open_memstream,
121 but uses a wchar_t wide character buffer.
123 * The new function ppoll is an improved version of poll, similar to pselect.
125 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
126 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
127 renameat, unlinkat, linkat, symlinkat, readlinkat.
129 * New Linux kernel system calls: unshare,
130 inotify_init, inotify_add_watch, inotify_rm_watch.
132 * The euidaccess function is now also known by the alias eaccess,
133 for compatibility with some other systems.
135 * Timezone data updated to 2006b version.
136 \f
137 Version 2.3.6
139 * The following bugs are resolved with this release:
141 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
142 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
143 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
144 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
145 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
146 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
148 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
150 * As of this release, GCC 4 can be used to compile the C Library.
152 * Timezone data updated to 2005m version.
153 \f
154 Version 2.3.5
156 * The following bugs are resolved with this release:
158 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
159 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
160 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
161 777, 787, 821, 822, 823, 825
163 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
164 \f
165 Version 2.3.4
167 * Support for RFC 3678. Real implementations exist only for Linux so far.
168 Implemented by Ulrich Drepper.
170 * nscd can now cache entries persistently. Expiring entries are reloaded.
171 For speedups the cache can be shared in memory with client processes.
172 Implemented by Ulrich Drepper.
174 * nscd can now perform SELinux checks.
175 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
177 * getaddrinfo queries are now cached. Canonical name lookup is performed
178 efficiently.
179 Implemented by Ulrich Drepper.
181 * The nothrow function attribute is used when headers are used by gcc when
182 compiling C code. This can avoid significant amounts of exception
183 handling data.
185 * The malloc functions perform more error checking and are stricter when
186 it comes to reacting on errors. The default action is to terminate
187 the process after showing an error message. Implemented by Ulrich Drepper.
189 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
190 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
192 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
193 namespaces using the new function dlmopen(). This feature is of course,
194 like most other dynamic loading functionality, not available in statically
195 linked applications. Implemented by Ulrich Drepper.
197 * Low-overhead boundary checking variants of string and some stdio functions
198 were added. These are to be used in conjunction with a gcc patch by
199 Jakub Jelinek which adds calls to these functions if possible.
200 Implemented by Jakub Jelinek and Ulrich Drepper.
202 * Old code for several operating systems and machine architectures that
203 have not been in working condition in a long time have been removed from
204 the main source tree maintained by the GNU C Library's maintainers.
205 These files are now reside in the separate `ports' source module
206 that is usable as an add-on when building the library.
207 \f
208 Version 2.3.3
210 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
211 interrogate the dynamic linker, compatible with the Solaris interface.
213 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
214 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
216 * getifaddrs now uses the netlink interface on Linux to get its information.
217 Implemented by Thorsten Kukuk.
219 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
220 Implemented by Ulrich Drepper.
222 * support for non-executable stacks on x86 has been added. Changes mostly
223 by Roland McGrath.
225 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
226 and Ulrich Drepper.
228 * getaddrinfo now performs destination address selection according to
229 RFC 3484.
230 \f
231 Version 2.3.2
233 * Thread-safe interfaces for many functions that access locale data
234 were added in version 2.3, but these features were omitted from NEWS.
235 Many functions have variants with an `_l' suffix that take a `locale_t'
236 object as a parameter rather than consulting the current locale.
237 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
238 create and maintain `locale_t' objects. Additionally, the new function
239 `uselocale' sets "the current locale" (as used by functions not so
240 parameterized) set for an individual thread. These features were added
241 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
243 * The functions getresuid, getresgid, setresuid, and setresgid, which
244 have long been available on Linux, are now declared in <unistd.h>
245 and are now also available on the Hurd.
247 * ELF thread-local storage support (TLS) now works on x86-64.
249 * The new dynamic string token $LIB is expanded in shared library names.
250 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
252 * Aldy Hernandez contributed complete software floating point support for
253 PowerPC machines with no FPU.
255 * fexecve is implemented on Linux.
257 * The `btowc' function should work at least twice as fast due to
258 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
260 * With approriate thread add-ons cancelable functions are now implemented
261 in libc.so as well. No need to call the function in libpthread. This
262 change allowed to finally disable the incorrect and expensive handling
263 of weak definition in ld.so.
265 * Yet more PLT entries in libc.so have been removed. We finally arrived
266 at the bare minimum. Startup times improved appropriately.
268 * Support for the new Linux/x86 system call interface was added. The
269 AT_SYSINFO auxiliary vector entry is recognized and handled.
270 \f
271 Version 2.3
273 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
274 charsets.
276 * iconv (the program and the interface) now accepts empty names (excluding
277 options like //TRANSLIT) to mean "use charset of current locale".
279 * localedef can now transliterate characters in strings which are not in
280 the provided charmap. The information from the input locale is used.
282 * Prelinking support was added for ELF targets. This requires additional
283 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
285 * Read-only stdio streams now use mmap to speed up operation by eliminating
286 copying and buffer underflows. To use add 'm' to the mode string of
287 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
289 * The malloc functions were completely rewritten by Wolfram Gloger based
290 on Doug Lea's malloc-2.7.0.c.
292 * Isamu Hasegawa contributed a completely new and POSIX-conformant
293 implementation of regex.
295 * Bruno Haible upgraded the iconv and locale implementation to support
296 Unicode 3.2.
298 * Contents of the LC_* and LANG environment variables in the CEN style are
299 not recognized anymore. It never was used. Change by Ulrich Drepper.
301 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
302 thread-local storage (TLS) ABI on some platforms.
303 Changes by Ulrich Drepper. SH support by Kaz Kojima.
305 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
306 EUC-JISX0213, and TSCII.
308 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
309 BSD-compatible interface for getting all network interface addresses.
310 Implementation for IPv4 by Roland McGrath.
312 * Loading of locale data is faster due to the introduction of a locale
313 archive. Implemented by Roland McGrath and Ulrich Drepper.
315 * Startup times are significantly reduced by not using exported functions
316 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
317 and Ulrich Drepper.
319 * Steven Munroe contributed a port to PowerPC64/Linux.
320 \f
321 Version 2.2.6
323 * The Hurd now uses the GNU libio implementation of stdio rather than the
324 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
326 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
327 with the same behavior as the Linux system call of the same name.
328 \f
329 Version 2.2.5
331 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
332 128-bit long double format.
334 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
335 IBM1161, and IBM1162 charsets.
337 * Andreas Jaeger contributed a port to x86-64/Linux.
339 * Peter Bruin contributed a port to PowerPC/Hurd.
341 * libc functions using I/O streams now can handle wide-oriented streams
342 as well.
344 * optimizations in the dynamic linker. Binaries created by recent binutils
345 versions start up quicker due to reduced time spent on relocations.
347 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
348 \f
349 Version 2.2.4
351 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
352 asinh, atanh, j0 for the 128-bit long double format.
354 * Bruno Haible updated all the code handling Unicode in some form to
355 support Unicode 3.1.
357 * Speed of regex for single-byte locales is back to previous levels.
358 Patch by Isamu Hasegawa.
360 * Alpha, SPARC, and IA-64 now also using floating stacks.
362 * Startup time of internationalized applications greatly improved through
363 iconv cache. Use iconvconfig to generate the cache file.
364 Contributed by Ulrich Drepper.
366 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
367 severe performance problems. Patch by David Mosberger.
369 * The Hurd port got a lot more functionality like AIO, various stdio
370 extensions, etc. Mainly done by Roland McGrath.
372 * mtrace can now lookup symbols in shared libraries.
373 \f
374 Version 2.2.3
376 * Intel's IA-64 math library is largely integrated. It provides fast and
377 accurate implementatations for most basic and standard math functions
378 in float, double, and long double format.
380 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
381 and asin for the 96-bit long double format and asin, log, tan for the
382 128-bit long double format.
384 * The beginning of a last-bit accurate math library by IBM Haifa were added.
385 The basic double functions exist today. Contributed by Abraham Ziv
386 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
387 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
389 * An asynchronous name lookup library was added. The interface is designed
390 after POSIX AIO. The proposal was circulated beforehand to get comments.
391 No negative ones came in. Implemented by Ulrich Drepper.
393 * Port to S390/64bit contributed by Martin Schwidefsky
394 <schwidefsky@de.ibm.com>.
396 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
397 of functions for Linux/IA-64.
399 * The RPC code is now thread safe. Threads can now use the same service
400 of different services at the same time. Patch by Eric Norum
401 <eric.norum@usask.ca> with some help by Ulrich Drepper.
403 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
404 family of functions for Linux/S390.
406 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
407 of functions for Linux/x86.
409 * Port to Linux/CRIS contributed by Axis Communications.
410 \f
411 Version 2.2.2
413 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
414 we can now check for namespace violations and missing declarations. The
415 result is that almost all headers are now Unix-compliant (as defined in
416 the upcoming XPG6). The negative side is that some programs might need
417 corrections, too, if they depend on the incorrect form of the headers in
418 previous versions which defined too many symbols and included too many
419 other headers.
421 * regex now handles multibyte character sets correctly.
422 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
424 * iconv (the program) does now conform to the upcoming XPG6 and handles
425 charmaps. Instead of the charset names the path of charmaps can be
426 provided and the conversion happens based on this data.
427 Contributed by Ulrich Drepper.
429 * The locale program now provides detailed information about the installed
430 locales. While
432 locale -a
434 only lists the names of the supported locales
436 locale -a --verbose
438 provides details such as country, language, and codeset name.
439 Contributed by Ulrich Drepper.
440 \f
441 Version 2.2.1
443 * The gencat program now parses the input file according to the charset
444 selected by the LC_CTYPE category. This is important for stateful
445 character sets. To make generating catalogs easier there is a way
446 to overwrite the charset selected by the locale: before the first
447 message or $ quote line the catalog can contain a line like
449 $ codeset=ISO-8859-2
451 to select the charset (ISO-8859-2 in this case).
453 Implemented by Shinya Hanataka and Ulrich Drepper.
455 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
456 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
457 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
459 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
460 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
462 * The LANGUAGE environment variable is now ignored unless the locale is
463 changed from the default "C" locale.
465 * The usual bug fixes.
466 \f
467 Version 2.2
469 * Greg McGary added runtime support for bounds checking using gcc's
470 new -fbounded-pointers option. ix86 target is complete. PowerPC
471 is in progress.
473 * Thorsten Kukuk added secure mode support to nscd.
475 * The Berkeley db libraries have been removed.
477 Related, the nss_db module is now in a separate package since it
478 obviously requires a database library being available.
480 * Wide character I/O streams implemented by Ulrich Drepper.
482 * Functions from the extended socket API added by Ulrich Drepper.
484 * Functions feenableexcept and fedisableexcept to control the
485 behaviour of individual exceptions have been added by Andreas Jaeger.
487 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
489 * The resolver code has been updated from bind 8.2.3-T5B which supports
490 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
491 and Mark Kettenis.
493 This change could in some situations effect backward compatibility. Since
494 now `_res' is a thread-local instead of a global variable, modifying it
495 in one thread does not have any effect in other threads.
497 The resolver library was also extended to allow IPv6 as the transport
498 protocol for the requests. This work was done by Stig Venaas.
500 * Compatibility code for K&R C compilers has been removed from the
501 header files. A ISO C compiler is needed to use the library
502 (conforming to either C89 or C99 standard).
504 * Complete rewrite of the localedef program to support multibyte character
505 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
506 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
507 Implemented by Ulrich Drepper.
509 Bruno Haible significantly improved the generation and use of the data
510 structures for the wide character tables.
512 * Plural handling in gettext implemented by Ulrich Drepper.
514 * The utmp daemon has been removed.
516 * The port to MIPS-Linux has been finished by Andreas Jaeger.
518 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
519 and Yutaka Niibe.
521 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
523 * POSIX barriers implemented by Kaz Kylheku.
525 * POSIX spawn function family implemented by Ulrich Drepper.
527 * POSIX spinlocks are now available.
529 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
531 * the configure option --enable-kernel=X.Y.Z allows to strip out
532 compatibility for kernel versions before X.Y.Z. This is currently only
533 implemented for Linux.
535 * the sockaddr_in6 structure changed. The IPv6 working group added a new
536 field sin6_scope_id. This means that all programs using IPv6 should be
537 recompiled. Don't expect binary compatibility with previous glibc
538 versions.
540 * various conversion modules for IBM character sets contributed by
541 Masahide Washizawa.
543 * IA-64 port by Jes Sorensen and HJ Lu.
545 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
546 Compiling the GNU C Library for Linux/ia64
547 ******************************************
549 Please refer to the file INSTALL in the same directory as you found
550 this file for general information about configuring and compiling
551 glibc.
553 For general inquiries about glibc under Linux/ia64 please use the
554 following mailing list linux-ia64@linuxia64.org or one of the relevant
555 glibc mailing lists.
557 Recommended Tools for Compilation
558 =================================
560 In order for glibc-2.2 to build correctly on the ia64 you need at
561 least the following versions of the GNU tools (the :
563 * The Cygnus toolchain snapshot for the ia64 as of August 4
564 including the provided set of patches. It is however recommend
565 you use the October 24 toolchain snapshot or a more recent version.
567 OR alternatively you can try the following (the Cygnus toolchain is
568 the recommended solution):
570 * GCC and binutils, GAS and GNU LD out of CVS from
571 sources.redhat.com as of August 28, 2000 or later. The CVS tree
572 may require special patches to work properly on the ia64.
574 Configuring and compiling GNU Libc for Linux/ia64
575 =================================================
577 The library requires Linux kernel version 2.4.0-test4-000728 or
578 later to funtion properly. Besides that it support for debug libraries
579 is currently untested. Hence the following options
580 are required for configuring the library:
582 --disable-debug --enable-kernel=2.4.0
584 It is also important that you make sure the library picks up the
585 appropriate kernel header files, if you do not have recent enough
586 kernel headers in /usr/src/linux/include, you should use the
587 --with-headers=<path> option to specify the location.
589 As an example I personally use the following options to configure
590 the library:
592 --disable-debug
593 --disable-cvs
594 --enable-kernel=2.4.0
595 --host=ia64-linux
596 --enable-add-ons=yes
597 --prefix=/usr
598 --with-headers=/home/jes/linux/include
601 Good luck
603 Jes Sorensen <jes@linuxcare.com>,
604 November 14th, 2000
605 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
606 \f
607 Version 2.1.3
609 * bug fixes
611 \f
612 Version 2.1.2
614 * bug fixes
616 \f
617 Version 2.1.1
619 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
621 * New xdr functions are added; some rpc functions are now 64bit clean.
623 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
625 * Fixed known incompatibilities with glibc 2.0.
627 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
629 * Optimized a number of functions (especially the ELF dynamic loader).
631 * Update timezone data files.
633 * lots of charmaps corrections
635 * some new locale definitions and charmaps
637 \f
638 Version 2.1
640 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
641 conform to POSIX member type requirements. Symbol versions have been
642 adjusted as needed within the library, and for direct use by applications,
643 but there is potential for problems if third-party libraries use
644 struct timeval as part of their interface. This does not present
645 a problem for X and other "essential" system libraries.
647 * An additional locale model to support C++ Standard Library locale
648 model and probably more was implemented by Ulrich Drepper.
650 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
651 symbol level.
653 * Miles Bader provided the `argp' function family to support hierachical
654 command line argument parsing, layered on top of getopt.
656 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
658 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
659 numbers.
661 * scanf recognizes the %a and %A format for scanning floating point numbers.
663 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
664 information and interfaces for the available integer types.
666 * about 130 new math functions were added to implement the ISO C9x math
667 library.
669 * the new header <complex.h> contains definitions of the complex math
670 functions from ISO C 9X.
672 * the new header <tgmath.h> defines generic macros to use complex or
673 real valued functions.
675 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
677 * Andreas Jaeger provided a test suite for the math library.
679 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
681 * Ulrich Drepper added character set conversion functions (iconv).
683 * Optimized string functions have been added.
685 * The localedata addon is now part of glibc.
687 * An implementation of profiling shared libraries was added by Ulrich Drepper.
689 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
690 daemon for NSS (nscd).
692 Missing a better place here are some numbers on improvements. Under
693 Linux 2.1.125 un-tar-ing the kernel sources takes
695 user system wall
697 using local files 12.19s 6.88s 22.91s
699 using NIS 13.92s 8.91s 26.34s
701 using NIS & nscd 10.37s 7.34s 25.30s
703 using NIS+ 27.57s 30.37s 640.46s
705 using NIS+ & nscd 10.25s 7.83s 26.51s
707 using NIS & old nscd [1] 13.83s 8.32s 29.60s
709 Keep in mind that non-namelookup related operations dominate above times.
710 It was just a common complain that using NIS+ unpacking the kernel is
711 horribly slow.
713 [1] The old nscd implementation is not available anymore since it was
714 distributed with glibc up to version 2.0.98 and thus is now replaced.
716 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
718 * Mark Kettenis provided a Hesiod NSS module.
720 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
721 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
723 * rcmd can now handle netgroups (Dick Streefland).
725 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
726 Bambrough.
728 * Support for the IPv6 protocol has been added to the socket API, as per the
729 latest draft standards.
731 * Support for Linux 2.2 has been added.
733 * Interface changes relative to the latest 2.0.x release:
734 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
735 addseverity NEW: Unix98
736 alphasort64 NEW: LFS
737 argp_err_exit_status NEW: argp, GNU ext
738 argp_error NEW: argp, GNU ext
739 argp_failure NEW: argp, GNU ext
740 argp_help NEW: argp, GNU ext
741 argp_parse NEW: argp, GNU ext
742 argp_program_bug_address NEW: argp, GNU ext
743 argp_program_version NEW: argp, GNU ext
744 argp_program_version_hook NEW: argp, GNU ext
745 argp_state_help NEW: argp, GNU ext
746 argp_usage NEW: argp, GNU ext
747 authdes_create NEW: Secure RPC
748 authdes_getucred NEW: Secure RPC
749 authdes_pk_create NEW: Secure RPC
750 backtrace NEW: GNU ext.
751 backtrace_symbols NEW: GNU ext.
752 backtrace_symbols_fd NEW: GNU ext.
753 cacos NEW: ISO C 9x
754 cacosf NEW: ISO C 9x
755 cacosh NEW: ISO C 9x
756 cacoshf NEW: ISO C 9x
757 cacoshl NEW: ISO C 9x
758 cacosl NEW: ISO C 9x
759 capget NEW: kernel
760 capset NEW: kernel
761 carg NEW: ISO C 9x
762 cargf NEW: ISO C 9x
763 cargl NEW: ISO C 9x
764 casin NEW: ISO C 9x
765 casinf NEW: ISO C 9x
766 casinh NEW: ISO C 9x
767 casinhf NEW: ISO C 9x
768 casinhl NEW: ISO C 9x
769 casinl NEW: ISO C 9x
770 catan NEW: ISO C 9x
771 catanf NEW: ISO C 9x
772 catanh NEW: ISO C 9x
773 catanhf NEW: ISO C 9x
774 catanhl NEW: ISO C 9x
775 catanl NEW: ISO C 9x
776 cbc_crypt NEW: Secure RPC
777 ccos NEW: ISO C 9x
778 ccosf NEW: ISO C 9x
779 ccosh NEW: ISO C 9x
780 ccoshf NEW: ISO C 9x
781 ccoshl NEW: ISO C 9x
782 ccosl NEW: ISO C 9x
783 cexp NEW: ISO C 9x
784 cexpf NEW: ISO C 9x
785 cexpl NEW: ISO C 9x
786 cimag NEW: ISO C 9x
787 cimagf NEW: ISO C 9x
788 cimagl NEW: ISO C 9x
789 clearerr_locked REMOVED
790 clntunix_create NEW: sunrpc ext
791 clog NEW: ISO C 9x
792 clog10 NEW: ISO C 9x
793 clog10f NEW: ISO C 9x
794 clog10l NEW: ISO C 9x
795 clogf NEW: ISO C 9x
796 clogl NEW: ISO C 9x
797 conj NEW: ISO C 9x
798 conjf NEW: ISO C 9x
799 conjl NEW: ISO C 9x
800 cpow NEW: ISO C 9x
801 cpowf NEW: ISO C 9x
802 cpowl NEW: ISO C 9x
803 cproj NEW: ISO C 9x
804 cprojf NEW: ISO C 9x
805 cprojl NEW: ISO C 9x
806 creal NEW: ISO C 9x
807 crealf NEW: ISO C 9x
808 creall NEW: ISO C 9x
809 creat64 NEW: LFS
810 csin NEW: ISO C 9x
811 csinf NEW: ISO C 9x
812 csinh NEW: ISO C 9x
813 csinhf NEW: ISO C 9x
814 csinhl NEW: ISO C 9x
815 csinl NEW: ISO C 9x
816 csqrt NEW: ISO C 9x
817 csqrtf NEW: ISO C 9x
818 csqrtl NEW: ISO C 9x
819 ctan NEW: ISO C 9x
820 ctanf NEW: ISO C 9x
821 ctanh NEW: ISO C 9x
822 ctanhf NEW: ISO C 9x
823 ctanhl NEW: ISO C 9x
824 ctanl NEW: ISO C 9x
825 des_setparity NEW: Secure RPC
826 ecb_crypt NEW: Secure RPC
827 endutxent NEW: Unix98
828 exp10 NEW: ISO C 9x
829 exp10f NEW: ISO C 9x
830 exp10l NEW: ISO C 9x
831 exp2 NEW: ISO C 9x
832 exp2f NEW: ISO C 9x
833 exp2l NEW: ISO C 9x
834 fattach NEW: STREAMS
835 fdetach NEW: STREAMS
836 fdim NEW: ISO C 9x
837 fdimf NEW: ISO C 9x
838 fdiml NEW: ISO C 9x
839 feclearexcept NEW: ISO C 9x
840 fegetenv NEW: ISO C 9x
841 fegetexceptflag NEW: ISO C 9x
842 fegetround NEW: ISO C 9x
843 feholdexcept NEW: ISO C 9x
844 feof_locked REMOVED
845 feraiseexcept NEW: ISO C 9x
846 ferror_locked REMOVED
847 fesetenv NEW: ISO C 9x
848 fesetexceptflag NEW: ISO C 9x
849 fesetround NEW: ISO C 9x
850 fetestexcept NEW: ISO C 9x
851 feupdateenv NEW: ISO C 9x
852 fflush_locked REMOVED
853 ffsl NEW: GNU ext.
854 ffsll NEW: GNU ext.
855 fgetpos64 NEW: LFS
856 fgets_unlocked NEW: GNU ext.
857 fileno_locked REMOVED
858 fma NEW: ISO C 9x
859 fmaf NEW: ISO C 9x
860 fmal NEW: ISO C 9x
861 fmax NEW: ISO C 9x
862 fmaxf NEW: ISO C 9x
863 fmaxl NEW: ISO C 9x
864 fmin NEW: ISO C 9x
865 fminf NEW: ISO C 9x
866 fminl NEW: ISO C 9x
867 fmtmsg NEW: Unix98
868 fopen64 NEW: LFS
869 fputc_locked REMOVED
870 fputs_unlocked NEW: GNU ext.
871 fread_unlocked NEW: GNU ext.
872 freopen64 NEW: LFS
873 fseeko NEW: Unix98
874 fsetpos64 NEW: LFS
875 fstatfs64 NEW: LFS
876 fstatvfs NEW: Unix98
877 fstatvfs64 NEW: LFS
878 ftello NEW: Unix98
879 ftello64 NEW: LFS
880 ftruncate64 NEW: LFS
881 ftw64 NEW: LFS
882 fwrite_unlocked NEW: GNU ext.
883 gai_strerror NEW: IPv6
884 gamma_r REMOVED
885 gammaf_r REMOVED
886 gammal_r REMOVED
887 getchar_locked REMOVED
888 getdate NEW: Unix98
889 getdate_err NEW: Unix98
890 getdate_r NEW: GNU ext.
891 getmsg NEW: STREAMS
892 getnameinfo NEW: IPv6
893 getnetname NEW: Secure RPC
894 getpmsg NEW: STREAMS
895 getpt NEW: Unix98 PTY
896 getrlimit64 NEW: LFS
897 getutxent NEW: Unix98
898 getutxid NEW: Unix98
899 getutxline NEW: Unix98
900 glob64 NEW: GNU ext.
901 globfree64 NEW: GNU ext.
902 gnu_get_libc_release NEW: GNU ext.
903 gnu_get_libc_version NEW: GNU ext.
904 grantpt NEW: Unix98 PTY
905 host2netname NEW: Secure RPC
906 iconv NEW: iconv
907 iconv_close NEW: iconv
908 iconv_open NEW: iconv
909 if_freenameindex NEW: IPv6
910 if_indextoname NEW: IPv6
911 if_nameindex NEW: IPv6
912 if_nametoindex NEW: IPv6
913 in6addr_any NEW: IPv6
914 in6addr_loopback NEW: IPv6
915 inet6_isipv4mapped NEW: IPv6
916 isastream NEW: STREAMS
917 iswblank NEW: GNU ext.
918 key_decryptsession NEW: Secure RPC
919 key_decryptsession_pk NEW: Secure RPC
920 key_encryptsession NEW: Secure RPC
921 key_encryptsession_pk NEW: Secure RPC
922 key_gendes NEW: Secure RPC
923 key_get_conv NEW: Secure RPC
924 key_secretkey_is_set NEW: Secure RPC
925 key_setnet NEW: Secure RPC
926 key_setsecret NEW: Secure RPC
927 llrint NEW: ISO C 9x
928 llrintf NEW: ISO C 9x
929 llrintl NEW: ISO C 9x
930 llround NEW: ISO C 9x
931 llroundf NEW: ISO C 9x
932 llroundl NEW: ISO C 9x
933 log2 NEW: ISO C 9x
934 log2f NEW: ISO C 9x
935 log2l NEW: ISO C 9x
936 lrint NEW: ISO C 9x
937 lrintf NEW: ISO C 9x
938 lrintl NEW: ISO C 9x
939 lround NEW: ISO C 9x
940 lroundf NEW: ISO C 9x
941 lroundl NEW: ISO C 9x
942 lseek64 NEW: LFS
943 makecontext NEW: Unix98
944 mempcpy NEW: GNU ext.
945 mmap64 NEW: LFS
946 moncontrol REMOVED
947 modify_ldt NEW: kernel
948 nan NEW: ISO C 9x
949 nanf NEW: ISO C 9x
950 nanl NEW: ISO C 9x
951 nearbyint NEW: ISO C 9x
952 nearbyintf NEW: ISO C 9x
953 nearbyintl NEW: ISO C 9x
954 netname2host NEW: Secure RPC
955 netname2user NEW: Secure RPC
956 nexttoward NEW: ISO C 9x
957 nexttowardf NEW: ISO C 9x
958 nexttowardl NEW: ISO C 9x
959 nftw NEW: Unix98
960 nftw64 NEW: LFS
961 open64 NEW: LFS
962 passwd2des NEW: Secure RPC
963 pow10 NEW: GNU ext.
964 pow10f NEW: GNU ext.
965 pow10l NEW: GNU ext.
966 pread NEW: Unix98
967 pread64 NEW: LFS
968 printf_size NEW: GNU ext.
969 printf_size_info NEW: GNU ext.
970 profil_counter REMOVED
971 pthread_mutexattr_getkind_np REPLACED
972 pthread_mutexattr_setkind_np REPLACED
973 ptsname NEW: Unix98 PTY
974 ptsname_r NEW: Unix98 PTY
975 putc_locked REMOVED
976 putchar_locked REMOVED
977 putgrent NEW: GNU ext.
978 putmsg NEW: STREAMS
979 putpmsg NEW: STREAMS
980 pututxline NEW: Unix98
981 pwrite NEW: Unix98
982 pwrite64 NEW: LFS
983 readdir64 NEW: LFS
984 readdir64_r NEW: LFS
985 remquo NEW: ISO C 9x
986 remquof NEW: ISO C 9x
987 remquol NEW: ISO C 9x
988 round NEW: ISO C 9x
989 roundf NEW: ISO C 9x
990 roundl NEW: ISO C 9x
991 rtime NEW: GNU ext.
992 scalbln NEW: ISO C 9x
993 scalblnf NEW: ISO C 9x
994 scalblnl NEW: ISO C 9x
995 scandir64 NEW: LFS
996 sendfile NEW: kernel
997 setcontext NEW: Unix98
998 setrlimit64 NEW: LFS
999 setutxent NEW: Unix98
1000 sighold NEW: Unix98
1001 sigignore NEW: Unix98
1002 sigqueue NEW: POSIX.1b
1003 sigrelse NEW: Unix98
1004 sigset NEW: POSIX.1b
1005 sigtimedwait NEW: POSIX.1b
1006 sigwaitinfo NEW: POSIX.1b
1007 sincos NEW: GNU ext.
1008 sincosf NEW: GNU ext.
1009 sincosl NEW: GNU ext.
1010 statfs64 NEW: LFS
1011 statvfs NEW: Unix98
1012 statvfs64 NEW: LFS
1013 strcasestr NEW: GNU ext.
1014 strtoimax NEW: ISO C 9x
1015 strtoumax NEW: ISO C 9x
1016 strverscmp NEW: GNU ext.
1017 svcauthdes_stats NEW: Secure RPC
1018 svcunix_create NEW: sunrpc etx
1019 svcunixfd_create NEW: sunrpc ext
1020 swapcontext NEW: Unix98
1021 tcgetsid NEW: Unix98 PTY
1022 tdestroy NEW: GNU ext.
1023 tgamma NEW: ISO C 9x
1024 tgammaf NEW: ISO C 9x
1025 tgammal NEW: ISO C 9x
1026 tmpfile64 NEW: LFS
1027 trunc NEW: ISO C 9x
1028 truncate64 NEW: LFS
1029 truncf NEW: ISO C 9x
1030 truncl NEW: ISO C 9x
1031 umount2 NEW: kernel
1032 unlockpt NEW: Unix98 PTY
1033 updwtmpx NEW: Unix98
1034 user2netname NEW: Secure RPC
1035 utmpxname NEW: Unix98
1036 versionsort NEW: GNU ext.
1037 versionsort64 NEW: GNU ext.
1038 waitid NEW: Unix98
1039 wcscasecmp NEW: GNU ext.
1040 wcsncasecmp NEW: GNU ext.
1041 wcsnlen NEW: GNU ext.
1042 wcstoimax NEW: ISO C 9x
1043 wcstoll NEW: ISO C 9x
1044 wcstoull NEW: ISO C 9x
1045 wcstoumax NEW: ISO C 9x
1046 wcswcs NEW: Unix98
1047 wordexp NEW: POSIX.2
1048 wordfree NEW: POSIX.2
1049 write_profiling REMOVED
1050 xdecrypt NEW: Secure RPC
1051 xdr_authdes_cred NEW: Secure RPC
1052 xdr_authdes_verf NEW: Secure RPC
1053 xdr_cryptkeyarg NEW: Secure RPC
1054 xdr_cryptkeyarg2 NEW: Secure RPC
1055 xdr_cryptkeyres NEW: Secure RPC
1056 xdr_getcredres NEW: Secure RPC
1057 xdr_key_netstarg NEW: Secure RPC
1058 xdr_key_netstres NEW: Secure RPC
1059 xdr_keybuf NEW: Secure RPC
1060 xdr_keystatus NEW: Secure RPC
1061 xdr_netnamestr NEW: Secure RPC
1062 xdr_sizeof NEW: Secure RPC
1063 xdr_unixcred NEW: sunrpc ext
1064 xencrypt NEW: Secure RPC
1065 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1066 \f
1067 Version 2.0.6
1069 * more bug fixes
1071 \f
1072 Version 2.0.5
1074 * more bug fixes
1076 * inet_ntoa is thread-safe
1078 * updwtmp is moved from libutil to libc
1080 * rewrite of cbrt function
1082 * update of timezone data
1083 \f
1084 Version 2.0.4
1086 * more bug fixes
1087 \f
1088 Version 2.0.3
1090 * more bug fixes
1091 \f
1092 Version 2.0.2
1094 * more bug fixes
1096 * add atoll function
1098 * fix complex problems in Berkeley DB code
1100 * fix math functions
1101 \f
1102 Version 2.0.1
1104 * fixed lots of header problems (especially Linux/GNU specific)
1106 * dynamic loader preserves all registers
1108 * Roland McGrath provided support for handling of auxiliary objects in
1109 the ELF dynamic loader.
1111 * support for parallel builds is improved
1112 \f
1113 Version 2.0
1115 * GNU extensions are no longer declared by default. To enable them you
1116 must define the macro `_GNU_SOURCE' in your program or compile with
1117 `-D_GNU_SOURCE'.
1119 * The library has changed from using GNU ld symbol aliases to using weak
1120 symbols where available. The ELF object file format supports weak
1121 symbols; GNU ld also supports weak symbols in the a.out format. (There
1122 is also now support for other GNU ld extensions in ELF. Use the
1123 `--with-elf' option to configure to indicate you have ELF, and
1124 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1125 of many files which contained only symbol aliases, reducing the size of
1126 the source and the compiled library; many other files were renamed to
1127 less cryptic names previously occupied by the symbol alias files.
1128 There is a new header file <elf.h> for programs which operate on
1129 files in the ELF format.
1131 * Converted to Autoconf version 2, so `configure' has more options.
1132 Run `configure --help' to see the details.
1134 * The library can now be configured to build profiling, highly-optimized
1135 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1136 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1137 `configure' enable building these extra libraries. The shared library is
1138 built by default when using both ELF and GNU ld. When shared libraries
1139 are enabled, the new library `-ldl' is available for arbitrary run-time
1140 loading of shared objects; its interface is defined in <dlfcn.h>. The
1141 new header file <link.h> gives access to the internals of the run-time
1142 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1143 application of same name on other systems and it provides information
1144 about dynamically linked binaries.
1146 * The C library now provides the run-time support code for profiling
1147 executables compiled with `-pg'. Programs can control the profiling code
1148 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1149 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1150 the support for this file format was contributed by David Mosberger-Tang.
1152 * The math code has been replaced with a math library based on fdlibm from
1153 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1154 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1155 functions. The math functions now reside in a separate library, so
1156 programs using them will need to use `-lm' their linking commands.
1158 * John C. Bowman contributed optimized ix87 assembler inline functions.
1160 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1161 mechanism similar to that found in Solaris 2. This is now used for the
1162 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1163 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1164 file controls what services are used for each individual database. This
1165 works by loading shared libraries with names specified in `nsswitch.conf',
1166 so service modules can be changed or added at any time without even
1167 relinking any program. Currently there are the file, db, and NIS based
1168 NSS services available.
1170 * The new functions `strtoq' and `strtouq' parse integer values from
1171 strings, like `strtol' and `strtoul', but they return `long long int' and
1172 `unsigned long long int' values, respectively (64-bit quantities).
1174 * The new functions `strtof' and `strtold' parse floating-point values from
1175 strings, like `strtod', but they return `float' and `long double' values,
1176 respectively (on some machines `double' and `long double' are the same).
1178 * Ulrich Drepper has contributed new implementations of the floating-point
1179 printing and reading code used in the `printf' family of functions and
1180 `strtod', `strtof', and `strtold'. These new functions are perfectly
1181 accurate, and much faster than the old ones.
1183 * The implementation of the POSIX locale model was completely rewritten by
1184 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1185 to compile the POSIX locale definition.
1187 * The former dummy implementations of the strcoll and strxfrm function are
1188 now replaced by fully functional code contributed by Ulrich Drepper. The
1189 collation information comes from the POSIX locale definitions.
1191 * The new header <langinfo.h> defines an interface for accessing
1192 various locale-dependent data (using the locale chosen with `setlocale').
1194 * Ulrich Drepper has contributed a new suite of functions for operation on
1195 wide-character and multibyte-character strings, in <wchar.h>;
1196 and classification and case conversion of wide characters, in <wctype.h>.
1197 These new functions are conforming to the ISO C, Amendement 1 specification.
1199 * There is now a second implementation of the standard I/O library available.
1200 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1201 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1203 * You can now use positional parameter specifications in format strings
1204 for the `printf' and `scanf' families of functions. For example,
1205 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1206 ``Number 6, Mr Jones''. This is mainly useful when providing different
1207 format strings for different languages, whose grammars may dictate
1208 different orderings of the values being printed. To support this
1209 feature, the interface for `register_printf_handler' has changed; see
1210 the header file <printf.h> for details.
1212 * The `printf' and `scanf' families of functions now understand a new
1213 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1214 to group numbers as indicated by the locale; for `scanf' and friends, this
1215 says to accept as valid only a number with all the proper grouping
1216 separators in the right places. In the default "C" locale, numbers are
1217 not grouped; but locales for specific countries will define the usual
1218 conventions (i.e. separate thousands with `,' in the US locale).
1220 * The pgrp functions have been regularized, slightly incompatibly but much
1221 less confusingly. The core functions are now `getpgid' and `setpgid',
1222 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1223 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1224 provided for compatibility. There is no longer an incompatible `getpgrp'
1225 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1227 * The new header file <fts.h> and suite of functions simplify programs that
1228 operate on directory trees. This code comes from 4.4 BSD.
1230 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1231 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1232 NSS scheme used in glibc.
1234 * There is a new malloc debugging hook `__memalign_hook'.
1236 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1237 `unsigned int' in <sys/types.h>. These are for compatibility only and
1238 their use is discouraged.
1240 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1241 done differently, so that it works even without GNU ld.
1243 * New function `euidaccess' checks allowed access to a file like `access',
1244 but using the effective IDs instead of the real IDs.
1246 * The time zone data files have been updated for the latest and greatest
1247 local time conventions of the countries of the world.
1249 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1250 see <dirent.h>.
1252 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1253 for formatting floating-point numbers. They are provided only for
1254 compatibility; new programs should use `sprintf' instead. There are
1255 also equivalent function for the `long double' floating-point type and
1256 all functions also exist in a reentrant form.
1258 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1259 functions for maintaining the login-record files (primarily of use to
1260 system programs such as `login'), and convenient functions for
1261 allocating and initializing a pseudo-terminal (pty) device.
1263 * Ulrich Drepper has contributed new support for System V style
1264 shared memory and IPC on systems that support it.
1266 * Ulrich Drepper has contributed several miscellaneous new functions found
1267 in System V: The `hsearch' family of functions provide an effective
1268 implementation of hash tables; `a64l' and `l64a' provide a very simple
1269 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1270 number generator.
1272 * Ulrich Drepper has contributed new reentrant counterparts for the
1273 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1275 * Ulrich Drepper has contributed new, highly-optimized versions of several
1276 string functions for the i486/Pentium family of processors.
1278 * Ulrich Drepper has updated the Linux-specific code, based largely
1279 on work done in Hongjiu Lu's version of GNU libc for Linux.
1280 The GNU library now supports Linux versions 2.0.10 and later,
1281 using the ELF object file format (i[3456]86-*-linux).
1283 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1285 * David Mosberger-Tang and Richard Henderson have ported the C library
1286 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1287 dynamic linking support for ELF/Alpha.
1289 * Richard Henderson contributed several Alpha optimized assembler function
1290 for arithmetic and string handling.
1292 * Ulrich Drepper has contributed a new set of message catalog functions to
1293 support multiple languages using the <libintl.h> interface, for use with
1294 his new package GNU gettext. Translation volunteers have contributed
1295 catalogs of the library's messages in Spanish, German, and Korean.
1297 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1298 program and the `catgets' function for reading the catalog files it
1299 creates. (The <libintl.h> interface is preferred; we include the
1300 <nl_types.h> interface using `catgets' only for source compatibility with
1301 programs already written to use it.)
1303 * New header file <values.h> gives SVID-compatible names for <limits.h>
1304 constants.
1306 * Various new macros, declarations, and small header files for compatibility
1307 with 4.4 BSD.
1309 * New function `group_member' is a convenient way to check if a process has
1310 a given effective group ID.
1312 * When using GCC 2.7 and later, the socket functions are now declared in a
1313 special way so that passing an argument of type `struct sockaddr_in *',
1314 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1315 `struct sockaddr *' type, does not generate a type-clash warning.
1317 * New function `error' declared in header file <error.h> is a convenient
1318 function for printing error messages and optionally exiting; this is the
1319 canonical function used in GNU programs. The new functions `err', `warn',
1320 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1321 doing the same thing.
1323 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1324 POSIX.2 `glob' function to do ~ and {...} expansion.
1326 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1327 `clearenv' which is used in POSIX.9 is also available.
1329 * New function `getsid' returns session ID number on systems that support it.
1331 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1332 files <db.h> and <mpool.h> provide a rich set of functions for several
1333 types of simple databases stored in memory and in files, and <ndbm.h> is
1334 an old `ndbm'-compatible interface using the `db' functions. Link with
1335 `-ldb' to get these functions.
1337 * New macro `strdupa' copies a string like `strdup', but uses local stack
1338 space from `alloca' instead of dynamic heap space from `malloc'.
1340 * New function `strnlen' is like `strlen' but searches only a given maximum
1341 number of characters for the null terminator. `stpncpy', `strndup' and
1342 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1343 function.
1345 * New function `statfs' in header <sys/statfs.h>.
1347 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1348 provide convenient functions for operating on blocks of null-terminated
1349 strings.
1351 * A new suite of functions in <utmp.h> handle all the details of reading
1352 and writing the utmp file.
1354 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1355 Thorsten Kukuk.
1357 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1358 completely POSIX compliant and also implemented the extended functionality
1359 to handle alternate digit representation and alternate era date formats.
1361 * Ulrich Drepper provided an implementation of the `strptime' function
1362 defined in XPG4.2 which transforms a string into a `struct tm' value.
1364 * Paul Eggert provided the tzselect shell script as part of the timezone
1365 code. The shell script makes it easy to select the correct timezone
1366 specification.
1368 * The implementation of the malloc family of functions is completely replaced
1369 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1370 The implementation uses the mmap function (if available) and it is
1371 optimized for the use in multi threaded programs.
1373 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1374 functions. This new functionality is usable by specifying a special
1375 salt string and it is compatible with implementation on *BSD systems.
1377 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1378 `getsubopt' to handle second level command line options, `bsd_signal'
1379 to access BSD style `signal' functionality, the obsolete `regexp' style
1380 expression matcher.
1382 * the `lchown' function is available on system which support this
1383 functionality.
1385 * The implementation of the shadow password handling function was contributed
1386 by Ulrich Drepper.
1388 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1390 * POSIX.1g support was added. The <sys/select.h> header is available,
1391 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1392 implementation of `getaddrinfo'.
1393 \f
1394 Version 1.09
1396 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1398 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1399 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1401 * The new function `daemon' from 4.4 BSD is useful for server programs that
1402 want to put themselves in the background.
1404 * Joel Sherrill has contributed support for several standalone boards that
1405 run without an operating system.
1407 * `printf', `scanf' and friends now accept a `q' type modifier for long
1408 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1410 * All of the code taken from BSD (notably most of the math and networking
1411 routines) has been updated from the BSD 4.4-Lite release.
1413 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1415 * The new functions `getdomainname' and `setdomainname' fetch or change the
1416 YP/NIS domain name. These are system calls which exist on systems which
1417 have YP (aka NIS).
1419 * The time zone data files have been updated for the latest international
1420 conventions.
1422 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1423 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1424 \f
1425 Version 1.08
1427 * The C library now includes support for Sun RPC, from Sun's free
1428 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1429 are included. (There is still no support for YP.)
1431 * Tom Quinn has contributed a port of the C library to SGI machines running
1432 Irix 4 (mips-sgi-irix4).
1434 * The new `lockf' function is a simplified interface to the locking
1435 facilities of `fcntl', included for compatibility.
1437 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1439 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1441 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1442 compatibility.
1444 * The error message printed by `assert' for a failed assertion now includes
1445 the name of the program (if using GNU ld) and the name of the calling
1446 function (with versions of GCC that support this).
1448 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1450 * The library now includes the <sys/mman.h> header file and memory
1451 management functions `mmap', `munmap', `mprotect', `msync', and
1452 `madvise', on systems that support those facilities.
1454 * The interface for `mcheck' has changed slightly: the function called to
1455 abort the program when an allocation inconsistency is detected now takes
1456 an argument that indicates the type of failure. The new function
1457 `mprobe' lets you request a consistency check for a particular block at
1458 any time (checks are normally done only when you call `free' or `realloc'
1459 on a block).
1461 * It is now possible to easily cross-compile the C library, building on one
1462 system a library to run on another machine and/or operating system. All
1463 you need to do is set the variable `HOST_CC' in `configparms' to the
1464 native compiler for programs to run on the machine you are building on (a
1465 few generator programs are used on Unix systems); set `CC' to the
1466 cross-compiler.
1468 * The new function `fexecve' (only implemented on the GNU system) executes
1469 a program file given a file descriptor already open on the file.
1470 \f
1471 Version 1.07
1473 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1474 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1476 * You can set the variable `libprefix' in `configparms' to specify a prefix
1477 to be prepended to installed library files; this makes it easy to install
1478 the GNU C library to be linked as `-lgnuc' or whatever.
1480 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1481 copies a limited number of characters from a string, and returns the
1482 address of the last character written.
1484 * You no longer need to check for whether the installed `stddef.h' is
1485 compatible with the GNU C library. configure now checks for you.
1487 * You can now define a per-stream `fileno' function to convert the
1488 stream's cookie into an integral file descriptor.
1490 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1491 allocates zero bytes of storage, and returns a unique pointer which
1492 you can pass to `realloc' or `free'. The behavior is undefined if
1493 you dereference this pointer.
1495 * The C library now runs on Sony NEWS m68k machines running either
1496 NewsOS 3 or NewsOS 4.
1498 * The new `syscall' function is a system-dependent primitive function
1499 for invoking system calls. It has the canonical behavior on Unix
1500 systems, including unreliable return values for some calls (such as
1501 `pipe', `fork' and `getppid').
1503 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1504 to `EAGAIN', which is the preferred name. On systems whose kernels
1505 use two distinct codes, the C library now translates EWOULDBLOCK to
1506 EAGAIN in every system call function.
1507 \f
1508 Version 1.06
1510 * The GNU C Library Reference Manual is now distributed with the library.
1511 `make dvi' will produce a DVI file of the printed manual.
1512 `make info' will produce Info files that you can read on line using C-h i
1513 in Emacs or the `info' program.
1514 Please send comments on the manual to bug-glibc-manual@gnu.org.
1516 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1518 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1520 * Jason Merrill has contributed a port to the Sequent Symmetry running
1521 Dynix version 3 (i386-sequent-dynix).
1523 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1524 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1526 * New function `memory_warnings' lets you arrange to get warnings when
1527 malloc is running out of memory to allocate, like Emacs gives you.
1529 * The C library now contains the relocating allocator used in Emacs 19 for
1530 its editing buffers. This allocator (ralloc) minimizes allocation
1531 overhead and fragmentation by moving allocated regions around whenever it
1532 needs to. You always refer to a ralloc'd region with a "handle" (a
1533 pointer to a pointer--an object of type `void **').
1535 * There is a new `printf' format: `%m' gives you the string corresponding
1536 to the error code in `errno'.
1538 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1539 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1540 pass, the `a' modifier says to fill in a `char **' you pass with a
1541 malloc'd string.
1543 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1544 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1545 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1547 * `mkstemp' is a traditional Unix function to atomically create and open a
1548 uniquely-named temporary file.
1549 \f
1550 Version 1.05
1552 * The standard location for the file that says what the local timezone is
1553 has changed again. It is now `/usr/local/etc/localtime' (or more
1554 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1556 * The distribution no longer contains any files with names longer than 14
1557 characters.
1559 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1560 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1562 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1563 \f
1564 Version 1.04
1566 * The configuration process has changed quite a bit. The `configure'
1567 script is now used just like the configuration scripts for other GNU
1568 packages. The `sysdeps' directory hierarchy is much rearranged.
1569 The file `INSTALL' explains the new scheme in detail.
1571 * The header files no longer need to be processed into ANSI C and
1572 traditional C versions. There is just one set of files to install, and
1573 it will work with ANSI or old C compilers (including `gcc -traditional').
1575 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1576 MIPS DECStation running Ultrix 4.
1578 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1579 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1580 made itself into a shared library.
1582 * Yet further improved support for the i386, running 4.3 BSD-like systems
1583 (such as Mach 3 with the Unix single-server), or System V.
1585 * New function `strncasecmp' to do case-insensitive string comparison
1586 with limited length.
1588 * New function `strsep' is a reentrant alternative to `strtok'.
1590 * New functions `scandir' and `alphasort' for searching directories.
1592 * New function `setenv' is a better interface to `putenv'.
1594 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1595 function for traversing a directory tree.
1597 * The GNU obstack package is now also part of the C library.
1598 The new function `open_obstack_stream' creates a stdio stream that
1599 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1600 formatted output directly to an obstack.
1602 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1603 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1605 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1607 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1608 things to your strings.
1610 * There are some new test programs: test-fseek, testmb, and testrand.
1612 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1613 These ports are not finished, but are a good starting place for really
1614 supporting those systems.
1616 * `/etc/localtime' is now the standard location for the file that says what
1617 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1618 This follows the general principle that `/etc' is the place for all local
1619 configuration files.
1621 * The C library header files now use `extern "C"' when used by the C++
1622 compiler, so the C library should now work with C++ code.
1624 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1625 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1626 in <strings.h>.)
1628 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1629 function which uses the `merge sort' algorithm, and is said to be
1630 significantly faster than the old GNU `qsort' function. Merge sort is
1631 now the standard `qsort' function. The new algorithm can require a lot
1632 of temporary storage; so, the old sorting function is called when the
1633 required storage is not available.
1635 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1636 provides the Unix `crypt' function, plus some other entry points.
1638 * The code and header files taken from 4.4 BSD have been updated with the
1639 latest files released from Berkeley.
1640 \f
1641 ----------------------------------------------------------------------
1642 Copyright information:
1644 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1645 Free Software Foundation, Inc.
1647 Permission is granted to anyone to make or distribute verbatim copies
1648 of this document as received, in any medium, provided that the
1649 copyright notice and this permission notice are preserved,
1650 thus giving the recipient permission to redistribute in turn.
1652 Permission is granted to distribute modified versions
1653 of this document, or of portions of it,
1654 under the above conditions, provided also that they
1655 carry prominent notices stating who last changed them.
1656 \f
1657 Local variables:
1658 version-control: never
1659 End: