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1 GNU C Library NEWS -- history of user-visible changes. 2006-09-29
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 2.5.1
10 * The following bugs are resolved with this release:
12 2337, 2749, 3213, 3291, 3306, 3320, 3322, 3334, 3348, 3352, 3369, 3429,
13 3451, 3458, 3559, 3632, 3664, 3673, 3674, 3747, 3842, 3851, 3855, 3884,
14 3902, 3919, 3944, 3954, 3955, 3957, 3995, 4069, 4070, 4074, 4076, 4101,
15 4102, 4130, 4131, 4181, 4342, 4344, 4364, 4368, 4381, 4405, 4406, 4411,
16 4438, 4439, 4465, 4512, 4514, 4586, 4702, 4858
18 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
20 \f
21 Version 2.5
23 * For Linux, the sorting of addresses returned by getaddrinfo now also
24 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
25 Implemented by Ulrich Drepper.
27 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
28 Implemented by Ulrich Drepper.
30 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
32 * New iconv module for MIK. Contributed by Alexander Shopov.
34 * For sites with broken group and/or passwd database, the auto-propagate
35 option of nscd can prevent creating ID lookup entries from the results
36 of a name lookup and vice versa. This usually is no problem but some
37 site might have problems with the default behavior.
38 Implemented by Ulrich Drepper.
40 * Iterating over entire database in NIS can be slow. With the
41 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
42 to trade time for memory. The entire database will be read at once.
43 Implemented by Ulrich Drepper.
45 * The interfaces introduced in RFC 3542 have been implemented by
46 Ulrich Drepper.
48 * Support for the new ELF hash table format was added by Ulrich Drepper.
50 * Support for priority inheritance mutexes added by Jakub Jelinek and
51 Ulrich Drepper.
53 * Support for priority protected mutexes added by Jakub Jelinek.
55 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
56 or_IN, csb_PL, fy_NL, sr_ME.
57 \f
58 Version 2.4
60 * More overflow detection functions.
62 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
63 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
65 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
66 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
67 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
68 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
69 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
70 by Masahide Washizawa.
72 * It is now possible to install audit libraries for the dynamic linker using
73 LD_AUDIT. Implemented by Ulrich Drepper.
75 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
76 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
77 For a libc and libpthread that works well on Linux 2.4 kernels, we
78 recommend using the stable 2.3 branch.
80 * The new function open_wmemstream acts like open_memstream,
81 but uses a wchar_t wide character buffer.
83 * The new function ppoll is an improved version of poll, similar to pselect.
85 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
86 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
87 renameat, unlinkat, linkat, symlinkat, readlinkat.
89 * New Linux kernel system calls: unshare,
90 inotify_init, inotify_add_watch, inotify_rm_watch.
92 * The euidaccess function is now also known by the alias eaccess,
93 for compatibility with some other systems.
95 * Timezone data updated to 2006b version.
96 \f
97 Version 2.3.6
99 * The following bugs are resolved with this release:
101 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
102 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
103 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
104 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
105 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
106 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
108 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
110 * As of this release, GCC 4 can be used to compile the C Library.
112 * Timezone data updated to 2005m version.
113 \f
114 Version 2.3.5
116 * The following bugs are resolved with this release:
118 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
119 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
120 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
121 777, 787, 821, 822, 823, 825
123 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
124 \f
125 Version 2.3.4
127 * Support for RFC 3678. Real implementations exist only for Linux so far.
128 Implemented by Ulrich Drepper.
130 * nscd can now cache entries persistently. Expiring entries are reloaded.
131 For speedups the cache can be shared in memory with client processes.
132 Implemented by Ulrich Drepper.
134 * nscd can now perform SELinux checks.
135 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
137 * getaddrinfo queries are now cached. Canonical name lookup is performed
138 efficiently.
139 Implemented by Ulrich Drepper.
141 * The nothrow function attribute is used when headers are used by gcc when
142 compiling C code. This can avoid significant amounts of exception
143 handling data.
145 * The malloc functions perform more error checking and are stricter when
146 it comes to reacting on errors. The default action is to terminate
147 the process after showing an error message. Implemented by Ulrich Drepper.
149 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
150 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
152 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
153 namespaces using the new function dlmopen(). This feature is of course,
154 like most other dynamic loading functionality, not available in statically
155 linked applications. Implemented by Ulrich Drepper.
157 * Low-overhead boundary checking variants of string and some stdio functions
158 were added. These are to be used in conjunction with a gcc patch by
159 Jakub Jelinek which adds calls to these functions if possible.
160 Implemented by Jakub Jelinek and Ulrich Drepper.
162 * Old code for several operating systems and machine architectures that
163 have not been in working condition in a long time have been removed from
164 the main source tree maintained by the GNU C Library's maintainers.
165 These files are now reside in the separate `ports' source module
166 that is usable as an add-on when building the library.
167 \f
168 Version 2.3.3
170 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
171 interrogate the dynamic linker, compatible with the Solaris interface.
173 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
174 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
176 * getifaddrs now uses the netlink interface on Linux to get its information.
177 Implemented by Thorsten Kukuk.
179 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
180 Implemented by Ulrich Drepper.
182 * support for non-executable stacks on x86 has been added. Changes mostly
183 by Roland McGrath.
185 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
186 and Ulrich Drepper.
188 * getaddrinfo now performs destination address selection according to
189 RFC 3484.
190 \f
191 Version 2.3.2
193 * Thread-safe interfaces for many functions that access locale data
194 were added in version 2.3, but these features were omitted from NEWS.
195 Many functions have variants with an `_l' suffix that take a `locale_t'
196 object as a parameter rather than consulting the current locale.
197 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
198 create and maintain `locale_t' objects. Additionally, the new function
199 `uselocale' sets "the current locale" (as used by functions not so
200 parameterized) set for an individual thread. These features were added
201 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
203 * The functions getresuid, getresgid, setresuid, and setresgid, which
204 have long been available on Linux, are now declared in <unistd.h>
205 and are now also available on the Hurd.
207 * ELF thread-local storage support (TLS) now works on x86-64.
209 * The new dynamic string token $LIB is expanded in shared library names.
210 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
212 * Aldy Hernandez contributed complete software floating point support for
213 PowerPC machines with no FPU.
215 * fexecve is implemented on Linux.
217 * The `btowc' function should work at least twice as fast due to
218 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
220 * With approriate thread add-ons cancelable functions are now implemented
221 in libc.so as well. No need to call the function in libpthread. This
222 change allowed to finally disable the incorrect and expensive handling
223 of weak definition in ld.so.
225 * Yet more PLT entries in libc.so have been removed. We finally arrived
226 at the bare minimum. Startup times improved appropriately.
228 * Support for the new Linux/x86 system call interface was added. The
229 AT_SYSINFO auxiliary vector entry is recognized and handled.
230 \f
231 Version 2.3
233 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
234 charsets.
236 * iconv (the program and the interface) now accepts empty names (excluding
237 options like //TRANSLIT) to mean "use charset of current locale".
239 * localedef can now transliterate characters in strings which are not in
240 the provided charmap. The information from the input locale is used.
242 * Prelinking support was added for ELF targets. This requires additional
243 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
245 * Read-only stdio streams now use mmap to speed up operation by eliminating
246 copying and buffer underflows. To use add 'm' to the mode string of
247 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
249 * The malloc functions were completely rewritten by Wolfram Gloger based
250 on Doug Lea's malloc-2.7.0.c.
252 * Isamu Hasegawa contributed a completely new and POSIX-conformant
253 implementation of regex.
255 * Bruno Haible upgraded the iconv and locale implementation to support
256 Unicode 3.2.
258 * Contents of the LC_* and LANG environment variables in the CEN style are
259 not recognized anymore. It never was used. Change by Ulrich Drepper.
261 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
262 thread-local storage (TLS) ABI on some platforms.
263 Changes by Ulrich Drepper. SH support by Kaz Kojima.
265 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
266 EUC-JISX0213, and TSCII.
268 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
269 BSD-compatible interface for getting all network interface addresses.
270 Implementation for IPv4 by Roland McGrath.
272 * Loading of locale data is faster due to the introduction of a locale
273 archive. Implemented by Roland McGrath and Ulrich Drepper.
275 * Startup times are significantly reduced by not using exported functions
276 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
277 and Ulrich Drepper.
279 * Steven Munroe contributed a port to PowerPC64/Linux.
280 \f
281 Version 2.2.6
283 * The Hurd now uses the GNU libio implementation of stdio rather than the
284 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
286 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
287 with the same behavior as the Linux system call of the same name.
288 \f
289 Version 2.2.5
291 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
292 128-bit long double format.
294 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
295 IBM1161, and IBM1162 charsets.
297 * Andreas Jaeger contributed a port to x86-64/Linux.
299 * Peter Bruin contributed a port to PowerPC/Hurd.
301 * libc functions using I/O streams now can handle wide-oriented streams
302 as well.
304 * optimizations in the dynamic linker. Binaries created by recent binutils
305 versions start up quicker due to reduced time spent on relocations.
307 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
308 \f
309 Version 2.2.4
311 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
312 asinh, atanh, j0 for the 128-bit long double format.
314 * Bruno Haible updated all the code handling Unicode in some form to
315 support Unicode 3.1.
317 * Speed of regex for single-byte locales is back to previous levels.
318 Patch by Isamu Hasegawa.
320 * Alpha, SPARC, and IA-64 now also using floating stacks.
322 * Startup time of internationalized applications greatly improved through
323 iconv cache. Use iconvconfig to generate the cache file.
324 Contributed by Ulrich Drepper.
326 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
327 severe performance problems. Patch by David Mosberger.
329 * The Hurd port got a lot more functionality like AIO, various stdio
330 extensions, etc. Mainly done by Roland McGrath.
332 * mtrace can now lookup symbols in shared libraries.
333 \f
334 Version 2.2.3
336 * Intel's IA-64 math library is largely integrated. It provides fast and
337 accurate implementatations for most basic and standard math functions
338 in float, double, and long double format.
340 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
341 and asin for the 96-bit long double format and asin, log, tan for the
342 128-bit long double format.
344 * The beginning of a last-bit accurate math library by IBM Haifa were added.
345 The basic double functions exist today. Contributed by Abraham Ziv
346 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
347 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
349 * An asynchronous name lookup library was added. The interface is designed
350 after POSIX AIO. The proposal was circulated beforehand to get comments.
351 No negative ones came in. Implemented by Ulrich Drepper.
353 * Port to S390/64bit contributed by Martin Schwidefsky
354 <schwidefsky@de.ibm.com>.
356 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
357 of functions for Linux/IA-64.
359 * The RPC code is now thread safe. Threads can now use the same service
360 of different services at the same time. Patch by Eric Norum
361 <eric.norum@usask.ca> with some help by Ulrich Drepper.
363 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
364 family of functions for Linux/S390.
366 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
367 of functions for Linux/x86.
369 * Port to Linux/CRIS contributed by Axis Communications.
370 \f
371 Version 2.2.2
373 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
374 we can now check for namespace violations and missing declarations. The
375 result is that almost all headers are now Unix-compliant (as defined in
376 the upcoming XPG6). The negative side is that some programs might need
377 corrections, too, if they depend on the incorrect form of the headers in
378 previous versions which defined too many symbols and included too many
379 other headers.
381 * regex now handles multibyte character sets correctly.
382 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
384 * iconv (the program) does now conform to the upcoming XPG6 and handles
385 charmaps. Instead of the charset names the path of charmaps can be
386 provided and the conversion happens based on this data.
387 Contributed by Ulrich Drepper.
389 * The locale program now provides detailed information about the installed
390 locales. While
392 locale -a
394 only lists the names of the supported locales
396 locale -a --verbose
398 provides details such as country, language, and codeset name.
399 Contributed by Ulrich Drepper.
400 \f
401 Version 2.2.1
403 * The gencat program now parses the input file according to the charset
404 selected by the LC_CTYPE category. This is important for stateful
405 character sets. To make generating catalogs easier there is a way
406 to overwrite the charset selected by the locale: before the first
407 message or $ quote line the catalog can contain a line like
409 $ codeset=ISO-8859-2
411 to select the charset (ISO-8859-2 in this case).
413 Implemented by Shinya Hanataka and Ulrich Drepper.
415 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
416 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
417 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
419 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
420 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
422 * The LANGUAGE environment variable is now ignored unless the locale is
423 changed from the default "C" locale.
425 * The usual bug fixes.
426 \f
427 Version 2.2
429 * Greg McGary added runtime support for bounds checking using gcc's
430 new -fbounded-pointers option. ix86 target is complete. PowerPC
431 is in progress.
433 * Thorsten Kukuk added secure mode support to nscd.
435 * The Berkeley db libraries have been removed.
437 Related, the nss_db module is now in a separate package since it
438 obviously requires a database library being available.
440 * Wide character I/O streams implemented by Ulrich Drepper.
442 * Functions from the extended socket API added by Ulrich Drepper.
444 * Functions feenableexcept and fedisableexcept to control the
445 behaviour of individual exceptions have been added by Andreas Jaeger.
447 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
449 * The resolver code has been updated from bind 8.2.3-T5B which supports
450 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
451 and Mark Kettenis.
453 This change could in some situations effect backward compatibility. Since
454 now `_res' is a thread-local instead of a global variable, modifying it
455 in one thread does not have any effect in other threads.
457 The resolver library was also extended to allow IPv6 as the transport
458 protocol for the requests. This work was done by Stig Venaas.
460 * Compatibility code for K&R C compilers has been removed from the
461 header files. A ISO C compiler is needed to use the library
462 (conforming to either C89 or C99 standard).
464 * Complete rewrite of the localedef program to support multibyte character
465 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
466 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
467 Implemented by Ulrich Drepper.
469 Bruno Haible significantly improved the generation and use of the data
470 structures for the wide character tables.
472 * Plural handling in gettext implemented by Ulrich Drepper.
474 * The utmp daemon has been removed.
476 * The port to MIPS-Linux has been finished by Andreas Jaeger.
478 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
479 and Yutaka Niibe.
481 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
483 * POSIX barriers implemented by Kaz Kylheku.
485 * POSIX spawn function family implemented by Ulrich Drepper.
487 * POSIX spinlocks are now available.
489 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
491 * the configure option --enable-kernel=X.Y.Z allows to strip out
492 compatibility for kernel versions before X.Y.Z. This is currently only
493 implemented for Linux.
495 * the sockaddr_in6 structure changed. The IPv6 working group added a new
496 field sin6_scope_id. This means that all programs using IPv6 should be
497 recompiled. Don't expect binary compatibility with previous glibc
498 versions.
500 * various conversion modules for IBM character sets contributed by
501 Masahide Washizawa.
503 * IA-64 port by Jes Sorensen and HJ Lu.
505 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
506 Compiling the GNU C Library for Linux/ia64
507 ******************************************
509 Please refer to the file INSTALL in the same directory as you found
510 this file for general information about configuring and compiling
511 glibc.
513 For general inquiries about glibc under Linux/ia64 please use the
514 following mailing list linux-ia64@linuxia64.org or one of the relevant
515 glibc mailing lists.
517 Recommended Tools for Compilation
518 =================================
520 In order for glibc-2.2 to build correctly on the ia64 you need at
521 least the following versions of the GNU tools (the :
523 * The Cygnus toolchain snapshot for the ia64 as of August 4
524 including the provided set of patches. It is however recommend
525 you use the October 24 toolchain snapshot or a more recent version.
527 OR alternatively you can try the following (the Cygnus toolchain is
528 the recommended solution):
530 * GCC and binutils, GAS and GNU LD out of CVS from
531 sources.redhat.com as of August 28, 2000 or later. The CVS tree
532 may require special patches to work properly on the ia64.
534 Configuring and compiling GNU Libc for Linux/ia64
535 =================================================
537 The library requires Linux kernel version 2.4.0-test4-000728 or
538 later to funtion properly. Besides that it support for debug libraries
539 is currently untested. Hence the following options
540 are required for configuring the library:
542 --disable-debug --enable-kernel=2.4.0
544 It is also important that you make sure the library picks up the
545 appropriate kernel header files, if you do not have recent enough
546 kernel headers in /usr/src/linux/include, you should use the
547 --with-headers=<path> option to specify the location.
549 As an example I personally use the following options to configure
550 the library:
552 --disable-debug
553 --disable-cvs
554 --enable-kernel=2.4.0
555 --host=ia64-linux
556 --enable-add-ons=yes
557 --prefix=/usr
558 --with-headers=/home/jes/linux/include
561 Good luck
563 Jes Sorensen <jes@linuxcare.com>,
564 November 14th, 2000
565 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
566 \f
567 Version 2.1.3
569 * bug fixes
571 \f
572 Version 2.1.2
574 * bug fixes
576 \f
577 Version 2.1.1
579 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
581 * New xdr functions are added; some rpc functions are now 64bit clean.
583 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
585 * Fixed known incompatibilities with glibc 2.0.
587 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
589 * Optimized a number of functions (especially the ELF dynamic loader).
591 * Update timezone data files.
593 * lots of charmaps corrections
595 * some new locale definitions and charmaps
597 \f
598 Version 2.1
600 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
601 conform to POSIX member type requirements. Symbol versions have been
602 adjusted as needed within the library, and for direct use by applications,
603 but there is potential for problems if third-party libraries use
604 struct timeval as part of their interface. This does not present
605 a problem for X and other "essential" system libraries.
607 * An additional locale model to support C++ Standard Library locale
608 model and probably more was implemented by Ulrich Drepper.
610 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
611 symbol level.
613 * Miles Bader provided the `argp' function family to support hierachical
614 command line argument parsing, layered on top of getopt.
616 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
618 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
619 numbers.
621 * scanf recognizes the %a and %A format for scanning floating point numbers.
623 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
624 information and interfaces for the available integer types.
626 * about 130 new math functions were added to implement the ISO C9x math
627 library.
629 * the new header <complex.h> contains definitions of the complex math
630 functions from ISO C 9X.
632 * the new header <tgmath.h> defines generic macros to use complex or
633 real valued functions.
635 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
637 * Andreas Jaeger provided a test suite for the math library.
639 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
641 * Ulrich Drepper added character set conversion functions (iconv).
643 * Optimized string functions have been added.
645 * The localedata addon is now part of glibc.
647 * An implementation of profiling shared libraries was added by Ulrich Drepper.
649 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
650 daemon for NSS (nscd).
652 Missing a better place here are some numbers on improvements. Under
653 Linux 2.1.125 un-tar-ing the kernel sources takes
655 user system wall
657 using local files 12.19s 6.88s 22.91s
659 using NIS 13.92s 8.91s 26.34s
661 using NIS & nscd 10.37s 7.34s 25.30s
663 using NIS+ 27.57s 30.37s 640.46s
665 using NIS+ & nscd 10.25s 7.83s 26.51s
667 using NIS & old nscd [1] 13.83s 8.32s 29.60s
669 Keep in mind that non-namelookup related operations dominate above times.
670 It was just a common complain that using NIS+ unpacking the kernel is
671 horribly slow.
673 [1] The old nscd implementation is not available anymore since it was
674 distributed with glibc up to version 2.0.98 and thus is now replaced.
676 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
678 * Mark Kettenis provided a Hesiod NSS module.
680 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
681 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
683 * rcmd can now handle netgroups (Dick Streefland).
685 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
686 Bambrough.
688 * Support for the IPv6 protocol has been added to the socket API, as per the
689 latest draft standards.
691 * Support for Linux 2.2 has been added.
693 * Interface changes relative to the latest 2.0.x release:
694 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
695 addseverity NEW: Unix98
696 alphasort64 NEW: LFS
697 argp_err_exit_status NEW: argp, GNU ext
698 argp_error NEW: argp, GNU ext
699 argp_failure NEW: argp, GNU ext
700 argp_help NEW: argp, GNU ext
701 argp_parse NEW: argp, GNU ext
702 argp_program_bug_address NEW: argp, GNU ext
703 argp_program_version NEW: argp, GNU ext
704 argp_program_version_hook NEW: argp, GNU ext
705 argp_state_help NEW: argp, GNU ext
706 argp_usage NEW: argp, GNU ext
707 authdes_create NEW: Secure RPC
708 authdes_getucred NEW: Secure RPC
709 authdes_pk_create NEW: Secure RPC
710 backtrace NEW: GNU ext.
711 backtrace_symbols NEW: GNU ext.
712 backtrace_symbols_fd NEW: GNU ext.
713 cacos NEW: ISO C 9x
714 cacosf NEW: ISO C 9x
715 cacosh NEW: ISO C 9x
716 cacoshf NEW: ISO C 9x
717 cacoshl NEW: ISO C 9x
718 cacosl NEW: ISO C 9x
719 capget NEW: kernel
720 capset NEW: kernel
721 carg NEW: ISO C 9x
722 cargf NEW: ISO C 9x
723 cargl NEW: ISO C 9x
724 casin NEW: ISO C 9x
725 casinf NEW: ISO C 9x
726 casinh NEW: ISO C 9x
727 casinhf NEW: ISO C 9x
728 casinhl NEW: ISO C 9x
729 casinl NEW: ISO C 9x
730 catan NEW: ISO C 9x
731 catanf NEW: ISO C 9x
732 catanh NEW: ISO C 9x
733 catanhf NEW: ISO C 9x
734 catanhl NEW: ISO C 9x
735 catanl NEW: ISO C 9x
736 cbc_crypt NEW: Secure RPC
737 ccos NEW: ISO C 9x
738 ccosf NEW: ISO C 9x
739 ccosh NEW: ISO C 9x
740 ccoshf NEW: ISO C 9x
741 ccoshl NEW: ISO C 9x
742 ccosl NEW: ISO C 9x
743 cexp NEW: ISO C 9x
744 cexpf NEW: ISO C 9x
745 cexpl NEW: ISO C 9x
746 cimag NEW: ISO C 9x
747 cimagf NEW: ISO C 9x
748 cimagl NEW: ISO C 9x
749 clearerr_locked REMOVED
750 clntunix_create NEW: sunrpc ext
751 clog NEW: ISO C 9x
752 clog10 NEW: ISO C 9x
753 clog10f NEW: ISO C 9x
754 clog10l NEW: ISO C 9x
755 clogf NEW: ISO C 9x
756 clogl NEW: ISO C 9x
757 conj NEW: ISO C 9x
758 conjf NEW: ISO C 9x
759 conjl NEW: ISO C 9x
760 cpow NEW: ISO C 9x
761 cpowf NEW: ISO C 9x
762 cpowl NEW: ISO C 9x
763 cproj NEW: ISO C 9x
764 cprojf NEW: ISO C 9x
765 cprojl NEW: ISO C 9x
766 creal NEW: ISO C 9x
767 crealf NEW: ISO C 9x
768 creall NEW: ISO C 9x
769 creat64 NEW: LFS
770 csin NEW: ISO C 9x
771 csinf NEW: ISO C 9x
772 csinh NEW: ISO C 9x
773 csinhf NEW: ISO C 9x
774 csinhl NEW: ISO C 9x
775 csinl NEW: ISO C 9x
776 csqrt NEW: ISO C 9x
777 csqrtf NEW: ISO C 9x
778 csqrtl NEW: ISO C 9x
779 ctan NEW: ISO C 9x
780 ctanf NEW: ISO C 9x
781 ctanh NEW: ISO C 9x
782 ctanhf NEW: ISO C 9x
783 ctanhl NEW: ISO C 9x
784 ctanl NEW: ISO C 9x
785 des_setparity NEW: Secure RPC
786 ecb_crypt NEW: Secure RPC
787 endutxent NEW: Unix98
788 exp10 NEW: ISO C 9x
789 exp10f NEW: ISO C 9x
790 exp10l NEW: ISO C 9x
791 exp2 NEW: ISO C 9x
792 exp2f NEW: ISO C 9x
793 exp2l NEW: ISO C 9x
794 fattach NEW: STREAMS
795 fdetach NEW: STREAMS
796 fdim NEW: ISO C 9x
797 fdimf NEW: ISO C 9x
798 fdiml NEW: ISO C 9x
799 feclearexcept NEW: ISO C 9x
800 fegetenv NEW: ISO C 9x
801 fegetexceptflag NEW: ISO C 9x
802 fegetround NEW: ISO C 9x
803 feholdexcept NEW: ISO C 9x
804 feof_locked REMOVED
805 feraiseexcept NEW: ISO C 9x
806 ferror_locked REMOVED
807 fesetenv NEW: ISO C 9x
808 fesetexceptflag NEW: ISO C 9x
809 fesetround NEW: ISO C 9x
810 fetestexcept NEW: ISO C 9x
811 feupdateenv NEW: ISO C 9x
812 fflush_locked REMOVED
813 ffsl NEW: GNU ext.
814 ffsll NEW: GNU ext.
815 fgetpos64 NEW: LFS
816 fgets_unlocked NEW: GNU ext.
817 fileno_locked REMOVED
818 fma NEW: ISO C 9x
819 fmaf NEW: ISO C 9x
820 fmal NEW: ISO C 9x
821 fmax NEW: ISO C 9x
822 fmaxf NEW: ISO C 9x
823 fmaxl NEW: ISO C 9x
824 fmin NEW: ISO C 9x
825 fminf NEW: ISO C 9x
826 fminl NEW: ISO C 9x
827 fmtmsg NEW: Unix98
828 fopen64 NEW: LFS
829 fputc_locked REMOVED
830 fputs_unlocked NEW: GNU ext.
831 fread_unlocked NEW: GNU ext.
832 freopen64 NEW: LFS
833 fseeko NEW: Unix98
834 fsetpos64 NEW: LFS
835 fstatfs64 NEW: LFS
836 fstatvfs NEW: Unix98
837 fstatvfs64 NEW: LFS
838 ftello NEW: Unix98
839 ftello64 NEW: LFS
840 ftruncate64 NEW: LFS
841 ftw64 NEW: LFS
842 fwrite_unlocked NEW: GNU ext.
843 gai_strerror NEW: IPv6
844 gamma_r REMOVED
845 gammaf_r REMOVED
846 gammal_r REMOVED
847 getchar_locked REMOVED
848 getdate NEW: Unix98
849 getdate_err NEW: Unix98
850 getdate_r NEW: GNU ext.
851 getmsg NEW: STREAMS
852 getnameinfo NEW: IPv6
853 getnetname NEW: Secure RPC
854 getpmsg NEW: STREAMS
855 getpt NEW: Unix98 PTY
856 getrlimit64 NEW: LFS
857 getutxent NEW: Unix98
858 getutxid NEW: Unix98
859 getutxline NEW: Unix98
860 glob64 NEW: GNU ext.
861 globfree64 NEW: GNU ext.
862 gnu_get_libc_release NEW: GNU ext.
863 gnu_get_libc_version NEW: GNU ext.
864 grantpt NEW: Unix98 PTY
865 host2netname NEW: Secure RPC
866 iconv NEW: iconv
867 iconv_close NEW: iconv
868 iconv_open NEW: iconv
869 if_freenameindex NEW: IPv6
870 if_indextoname NEW: IPv6
871 if_nameindex NEW: IPv6
872 if_nametoindex NEW: IPv6
873 in6addr_any NEW: IPv6
874 in6addr_loopback NEW: IPv6
875 inet6_isipv4mapped NEW: IPv6
876 isastream NEW: STREAMS
877 iswblank NEW: GNU ext.
878 key_decryptsession NEW: Secure RPC
879 key_decryptsession_pk NEW: Secure RPC
880 key_encryptsession NEW: Secure RPC
881 key_encryptsession_pk NEW: Secure RPC
882 key_gendes NEW: Secure RPC
883 key_get_conv NEW: Secure RPC
884 key_secretkey_is_set NEW: Secure RPC
885 key_setnet NEW: Secure RPC
886 key_setsecret NEW: Secure RPC
887 llrint NEW: ISO C 9x
888 llrintf NEW: ISO C 9x
889 llrintl NEW: ISO C 9x
890 llround NEW: ISO C 9x
891 llroundf NEW: ISO C 9x
892 llroundl NEW: ISO C 9x
893 log2 NEW: ISO C 9x
894 log2f NEW: ISO C 9x
895 log2l NEW: ISO C 9x
896 lrint NEW: ISO C 9x
897 lrintf NEW: ISO C 9x
898 lrintl NEW: ISO C 9x
899 lround NEW: ISO C 9x
900 lroundf NEW: ISO C 9x
901 lroundl NEW: ISO C 9x
902 lseek64 NEW: LFS
903 makecontext NEW: Unix98
904 mempcpy NEW: GNU ext.
905 mmap64 NEW: LFS
906 moncontrol REMOVED
907 modify_ldt NEW: kernel
908 nan NEW: ISO C 9x
909 nanf NEW: ISO C 9x
910 nanl NEW: ISO C 9x
911 nearbyint NEW: ISO C 9x
912 nearbyintf NEW: ISO C 9x
913 nearbyintl NEW: ISO C 9x
914 netname2host NEW: Secure RPC
915 netname2user NEW: Secure RPC
916 nexttoward NEW: ISO C 9x
917 nexttowardf NEW: ISO C 9x
918 nexttowardl NEW: ISO C 9x
919 nftw NEW: Unix98
920 nftw64 NEW: LFS
921 open64 NEW: LFS
922 passwd2des NEW: Secure RPC
923 pow10 NEW: GNU ext.
924 pow10f NEW: GNU ext.
925 pow10l NEW: GNU ext.
926 pread NEW: Unix98
927 pread64 NEW: LFS
928 printf_size NEW: GNU ext.
929 printf_size_info NEW: GNU ext.
930 profil_counter REMOVED
931 pthread_mutexattr_getkind_np REPLACED
932 pthread_mutexattr_setkind_np REPLACED
933 ptsname NEW: Unix98 PTY
934 ptsname_r NEW: Unix98 PTY
935 putc_locked REMOVED
936 putchar_locked REMOVED
937 putgrent NEW: GNU ext.
938 putmsg NEW: STREAMS
939 putpmsg NEW: STREAMS
940 pututxline NEW: Unix98
941 pwrite NEW: Unix98
942 pwrite64 NEW: LFS
943 readdir64 NEW: LFS
944 readdir64_r NEW: LFS
945 remquo NEW: ISO C 9x
946 remquof NEW: ISO C 9x
947 remquol NEW: ISO C 9x
948 round NEW: ISO C 9x
949 roundf NEW: ISO C 9x
950 roundl NEW: ISO C 9x
951 rtime NEW: GNU ext.
952 scalbln NEW: ISO C 9x
953 scalblnf NEW: ISO C 9x
954 scalblnl NEW: ISO C 9x
955 scandir64 NEW: LFS
956 sendfile NEW: kernel
957 setcontext NEW: Unix98
958 setrlimit64 NEW: LFS
959 setutxent NEW: Unix98
960 sighold NEW: Unix98
961 sigignore NEW: Unix98
962 sigqueue NEW: POSIX.1b
963 sigrelse NEW: Unix98
964 sigset NEW: POSIX.1b
965 sigtimedwait NEW: POSIX.1b
966 sigwaitinfo NEW: POSIX.1b
967 sincos NEW: GNU ext.
968 sincosf NEW: GNU ext.
969 sincosl NEW: GNU ext.
970 statfs64 NEW: LFS
971 statvfs NEW: Unix98
972 statvfs64 NEW: LFS
973 strcasestr NEW: GNU ext.
974 strtoimax NEW: ISO C 9x
975 strtoumax NEW: ISO C 9x
976 strverscmp NEW: GNU ext.
977 svcauthdes_stats NEW: Secure RPC
978 svcunix_create NEW: sunrpc etx
979 svcunixfd_create NEW: sunrpc ext
980 swapcontext NEW: Unix98
981 tcgetsid NEW: Unix98 PTY
982 tdestroy NEW: GNU ext.
983 tgamma NEW: ISO C 9x
984 tgammaf NEW: ISO C 9x
985 tgammal NEW: ISO C 9x
986 tmpfile64 NEW: LFS
987 trunc NEW: ISO C 9x
988 truncate64 NEW: LFS
989 truncf NEW: ISO C 9x
990 truncl NEW: ISO C 9x
991 umount2 NEW: kernel
992 unlockpt NEW: Unix98 PTY
993 updwtmpx NEW: Unix98
994 user2netname NEW: Secure RPC
995 utmpxname NEW: Unix98
996 versionsort NEW: GNU ext.
997 versionsort64 NEW: GNU ext.
998 waitid NEW: Unix98
999 wcscasecmp NEW: GNU ext.
1000 wcsncasecmp NEW: GNU ext.
1001 wcsnlen NEW: GNU ext.
1002 wcstoimax NEW: ISO C 9x
1003 wcstoll NEW: ISO C 9x
1004 wcstoull NEW: ISO C 9x
1005 wcstoumax NEW: ISO C 9x
1006 wcswcs NEW: Unix98
1007 wordexp NEW: POSIX.2
1008 wordfree NEW: POSIX.2
1009 write_profiling REMOVED
1010 xdecrypt NEW: Secure RPC
1011 xdr_authdes_cred NEW: Secure RPC
1012 xdr_authdes_verf NEW: Secure RPC
1013 xdr_cryptkeyarg NEW: Secure RPC
1014 xdr_cryptkeyarg2 NEW: Secure RPC
1015 xdr_cryptkeyres NEW: Secure RPC
1016 xdr_getcredres NEW: Secure RPC
1017 xdr_key_netstarg NEW: Secure RPC
1018 xdr_key_netstres NEW: Secure RPC
1019 xdr_keybuf NEW: Secure RPC
1020 xdr_keystatus NEW: Secure RPC
1021 xdr_netnamestr NEW: Secure RPC
1022 xdr_sizeof NEW: Secure RPC
1023 xdr_unixcred NEW: sunrpc ext
1024 xencrypt NEW: Secure RPC
1025 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1026 \f
1027 Version 2.0.6
1029 * more bug fixes
1031 \f
1032 Version 2.0.5
1034 * more bug fixes
1036 * inet_ntoa is thread-safe
1038 * updwtmp is moved from libutil to libc
1040 * rewrite of cbrt function
1042 * update of timezone data
1043 \f
1044 Version 2.0.4
1046 * more bug fixes
1047 \f
1048 Version 2.0.3
1050 * more bug fixes
1051 \f
1052 Version 2.0.2
1054 * more bug fixes
1056 * add atoll function
1058 * fix complex problems in Berkeley DB code
1060 * fix math functions
1061 \f
1062 Version 2.0.1
1064 * fixed lots of header problems (especially Linux/GNU specific)
1066 * dynamic loader preserves all registers
1068 * Roland McGrath provided support for handling of auxiliary objects in
1069 the ELF dynamic loader.
1071 * support for parallel builds is improved
1072 \f
1073 Version 2.0
1075 * GNU extensions are no longer declared by default. To enable them you
1076 must define the macro `_GNU_SOURCE' in your program or compile with
1077 `-D_GNU_SOURCE'.
1079 * The library has changed from using GNU ld symbol aliases to using weak
1080 symbols where available. The ELF object file format supports weak
1081 symbols; GNU ld also supports weak symbols in the a.out format. (There
1082 is also now support for other GNU ld extensions in ELF. Use the
1083 `--with-elf' option to configure to indicate you have ELF, and
1084 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1085 of many files which contained only symbol aliases, reducing the size of
1086 the source and the compiled library; many other files were renamed to
1087 less cryptic names previously occupied by the symbol alias files.
1088 There is a new header file <elf.h> for programs which operate on
1089 files in the ELF format.
1091 * Converted to Autoconf version 2, so `configure' has more options.
1092 Run `configure --help' to see the details.
1094 * The library can now be configured to build profiling, highly-optimized
1095 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1096 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1097 `configure' enable building these extra libraries. The shared library is
1098 built by default when using both ELF and GNU ld. When shared libraries
1099 are enabled, the new library `-ldl' is available for arbitrary run-time
1100 loading of shared objects; its interface is defined in <dlfcn.h>. The
1101 new header file <link.h> gives access to the internals of the run-time
1102 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1103 application of same name on other systems and it provides information
1104 about dynamically linked binaries.
1106 * The C library now provides the run-time support code for profiling
1107 executables compiled with `-pg'. Programs can control the profiling code
1108 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1109 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1110 the support for this file format was contributed by David Mosberger-Tang.
1112 * The math code has been replaced with a math library based on fdlibm from
1113 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1114 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1115 functions. The math functions now reside in a separate library, so
1116 programs using them will need to use `-lm' their linking commands.
1118 * John C. Bowman contributed optimized ix87 assembler inline functions.
1120 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1121 mechanism similar to that found in Solaris 2. This is now used for the
1122 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1123 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1124 file controls what services are used for each individual database. This
1125 works by loading shared libraries with names specified in `nsswitch.conf',
1126 so service modules can be changed or added at any time without even
1127 relinking any program. Currently there are the file, db, and NIS based
1128 NSS services available.
1130 * The new functions `strtoq' and `strtouq' parse integer values from
1131 strings, like `strtol' and `strtoul', but they return `long long int' and
1132 `unsigned long long int' values, respectively (64-bit quantities).
1134 * The new functions `strtof' and `strtold' parse floating-point values from
1135 strings, like `strtod', but they return `float' and `long double' values,
1136 respectively (on some machines `double' and `long double' are the same).
1138 * Ulrich Drepper has contributed new implementations of the floating-point
1139 printing and reading code used in the `printf' family of functions and
1140 `strtod', `strtof', and `strtold'. These new functions are perfectly
1141 accurate, and much faster than the old ones.
1143 * The implementation of the POSIX locale model was completely rewritten by
1144 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1145 to compile the POSIX locale definition.
1147 * The former dummy implementations of the strcoll and strxfrm function are
1148 now replaced by fully functional code contributed by Ulrich Drepper. The
1149 collation information comes from the POSIX locale definitions.
1151 * The new header <langinfo.h> defines an interface for accessing
1152 various locale-dependent data (using the locale chosen with `setlocale').
1154 * Ulrich Drepper has contributed a new suite of functions for operation on
1155 wide-character and multibyte-character strings, in <wchar.h>;
1156 and classification and case conversion of wide characters, in <wctype.h>.
1157 These new functions are conforming to the ISO C, Amendement 1 specification.
1159 * There is now a second implementation of the standard I/O library available.
1160 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1161 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1163 * You can now use positional parameter specifications in format strings
1164 for the `printf' and `scanf' families of functions. For example,
1165 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1166 ``Number 6, Mr Jones''. This is mainly useful when providing different
1167 format strings for different languages, whose grammars may dictate
1168 different orderings of the values being printed. To support this
1169 feature, the interface for `register_printf_handler' has changed; see
1170 the header file <printf.h> for details.
1172 * The `printf' and `scanf' families of functions now understand a new
1173 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1174 to group numbers as indicated by the locale; for `scanf' and friends, this
1175 says to accept as valid only a number with all the proper grouping
1176 separators in the right places. In the default "C" locale, numbers are
1177 not grouped; but locales for specific countries will define the usual
1178 conventions (i.e. separate thousands with `,' in the US locale).
1180 * The pgrp functions have been regularized, slightly incompatibly but much
1181 less confusingly. The core functions are now `getpgid' and `setpgid',
1182 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1183 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1184 provided for compatibility. There is no longer an incompatible `getpgrp'
1185 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1187 * The new header file <fts.h> and suite of functions simplify programs that
1188 operate on directory trees. This code comes from 4.4 BSD.
1190 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1191 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1192 NSS scheme used in glibc.
1194 * There is a new malloc debugging hook `__memalign_hook'.
1196 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1197 `unsigned int' in <sys/types.h>. These are for compatibility only and
1198 their use is discouraged.
1200 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1201 done differently, so that it works even without GNU ld.
1203 * New function `euidaccess' checks allowed access to a file like `access',
1204 but using the effective IDs instead of the real IDs.
1206 * The time zone data files have been updated for the latest and greatest
1207 local time conventions of the countries of the world.
1209 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1210 see <dirent.h>.
1212 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1213 for formatting floating-point numbers. They are provided only for
1214 compatibility; new programs should use `sprintf' instead. There are
1215 also equivalent function for the `long double' floating-point type and
1216 all functions also exist in a reentrant form.
1218 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1219 functions for maintaining the login-record files (primarily of use to
1220 system programs such as `login'), and convenient functions for
1221 allocating and initializing a pseudo-terminal (pty) device.
1223 * Ulrich Drepper has contributed new support for System V style
1224 shared memory and IPC on systems that support it.
1226 * Ulrich Drepper has contributed several miscellaneous new functions found
1227 in System V: The `hsearch' family of functions provide an effective
1228 implementation of hash tables; `a64l' and `l64a' provide a very simple
1229 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1230 number generator.
1232 * Ulrich Drepper has contributed new reentrant counterparts for the
1233 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1235 * Ulrich Drepper has contributed new, highly-optimized versions of several
1236 string functions for the i486/Pentium family of processors.
1238 * Ulrich Drepper has updated the Linux-specific code, based largely
1239 on work done in Hongjiu Lu's version of GNU libc for Linux.
1240 The GNU library now supports Linux versions 2.0.10 and later,
1241 using the ELF object file format (i[3456]86-*-linux).
1243 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1245 * David Mosberger-Tang and Richard Henderson have ported the C library
1246 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1247 dynamic linking support for ELF/Alpha.
1249 * Richard Henderson contributed several Alpha optimized assembler function
1250 for arithmetic and string handling.
1252 * Ulrich Drepper has contributed a new set of message catalog functions to
1253 support multiple languages using the <libintl.h> interface, for use with
1254 his new package GNU gettext. Translation volunteers have contributed
1255 catalogs of the library's messages in Spanish, German, and Korean.
1257 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1258 program and the `catgets' function for reading the catalog files it
1259 creates. (The <libintl.h> interface is preferred; we include the
1260 <nl_types.h> interface using `catgets' only for source compatibility with
1261 programs already written to use it.)
1263 * New header file <values.h> gives SVID-compatible names for <limits.h>
1264 constants.
1266 * Various new macros, declarations, and small header files for compatibility
1267 with 4.4 BSD.
1269 * New function `group_member' is a convenient way to check if a process has
1270 a given effective group ID.
1272 * When using GCC 2.7 and later, the socket functions are now declared in a
1273 special way so that passing an argument of type `struct sockaddr_in *',
1274 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1275 `struct sockaddr *' type, does not generate a type-clash warning.
1277 * New function `error' declared in header file <error.h> is a convenient
1278 function for printing error messages and optionally exiting; this is the
1279 canonical function used in GNU programs. The new functions `err', `warn',
1280 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1281 doing the same thing.
1283 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1284 POSIX.2 `glob' function to do ~ and {...} expansion.
1286 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1287 `clearenv' which is used in POSIX.9 is also available.
1289 * New function `getsid' returns session ID number on systems that support it.
1291 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1292 files <db.h> and <mpool.h> provide a rich set of functions for several
1293 types of simple databases stored in memory and in files, and <ndbm.h> is
1294 an old `ndbm'-compatible interface using the `db' functions. Link with
1295 `-ldb' to get these functions.
1297 * New macro `strdupa' copies a string like `strdup', but uses local stack
1298 space from `alloca' instead of dynamic heap space from `malloc'.
1300 * New function `strnlen' is like `strlen' but searches only a given maximum
1301 number of characters for the null terminator. `stpncpy', `strndup' and
1302 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1303 function.
1305 * New function `statfs' in header <sys/statfs.h>.
1307 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1308 provide convenient functions for operating on blocks of null-terminated
1309 strings.
1311 * A new suite of functions in <utmp.h> handle all the details of reading
1312 and writing the utmp file.
1314 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1315 Thorsten Kukuk.
1317 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1318 completely POSIX compliant and also implemented the extended functionality
1319 to handle alternate digit representation and alternate era date formats.
1321 * Ulrich Drepper provided an implementation of the `strptime' function
1322 defined in XPG4.2 which transforms a string into a `struct tm' value.
1324 * Paul Eggert provided the tzselect shell script as part of the timezone
1325 code. The shell script makes it easy to select the correct timezone
1326 specification.
1328 * The implementation of the malloc family of functions is completely replaced
1329 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1330 The implementation uses the mmap function (if available) and it is
1331 optimized for the use in multi threaded programs.
1333 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1334 functions. This new functionality is usable by specifying a special
1335 salt string and it is compatible with implementation on *BSD systems.
1337 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1338 `getsubopt' to handle second level command line options, `bsd_signal'
1339 to access BSD style `signal' functionality, the obsolete `regexp' style
1340 expression matcher.
1342 * the `lchown' function is available on system which support this
1343 functionality.
1345 * The implementation of the shadow password handling function was contributed
1346 by Ulrich Drepper.
1348 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1350 * POSIX.1g support was added. The <sys/select.h> header is available,
1351 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1352 implementation of `getaddrinfo'.
1353 \f
1354 Version 1.09
1356 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1358 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1359 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1361 * The new function `daemon' from 4.4 BSD is useful for server programs that
1362 want to put themselves in the background.
1364 * Joel Sherrill has contributed support for several standalone boards that
1365 run without an operating system.
1367 * `printf', `scanf' and friends now accept a `q' type modifier for long
1368 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1370 * All of the code taken from BSD (notably most of the math and networking
1371 routines) has been updated from the BSD 4.4-Lite release.
1373 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1375 * The new functions `getdomainname' and `setdomainname' fetch or change the
1376 YP/NIS domain name. These are system calls which exist on systems which
1377 have YP (aka NIS).
1379 * The time zone data files have been updated for the latest international
1380 conventions.
1382 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1383 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1384 \f
1385 Version 1.08
1387 * The C library now includes support for Sun RPC, from Sun's free
1388 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1389 are included. (There is still no support for YP.)
1391 * Tom Quinn has contributed a port of the C library to SGI machines running
1392 Irix 4 (mips-sgi-irix4).
1394 * The new `lockf' function is a simplified interface to the locking
1395 facilities of `fcntl', included for compatibility.
1397 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1399 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1401 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1402 compatibility.
1404 * The error message printed by `assert' for a failed assertion now includes
1405 the name of the program (if using GNU ld) and the name of the calling
1406 function (with versions of GCC that support this).
1408 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1410 * The library now includes the <sys/mman.h> header file and memory
1411 management functions `mmap', `munmap', `mprotect', `msync', and
1412 `madvise', on systems that support those facilities.
1414 * The interface for `mcheck' has changed slightly: the function called to
1415 abort the program when an allocation inconsistency is detected now takes
1416 an argument that indicates the type of failure. The new function
1417 `mprobe' lets you request a consistency check for a particular block at
1418 any time (checks are normally done only when you call `free' or `realloc'
1419 on a block).
1421 * It is now possible to easily cross-compile the C library, building on one
1422 system a library to run on another machine and/or operating system. All
1423 you need to do is set the variable `HOST_CC' in `configparms' to the
1424 native compiler for programs to run on the machine you are building on (a
1425 few generator programs are used on Unix systems); set `CC' to the
1426 cross-compiler.
1428 * The new function `fexecve' (only implemented on the GNU system) executes
1429 a program file given a file descriptor already open on the file.
1430 \f
1431 Version 1.07
1433 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1434 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1436 * You can set the variable `libprefix' in `configparms' to specify a prefix
1437 to be prepended to installed library files; this makes it easy to install
1438 the GNU C library to be linked as `-lgnuc' or whatever.
1440 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1441 copies a limited number of characters from a string, and returns the
1442 address of the last character written.
1444 * You no longer need to check for whether the installed `stddef.h' is
1445 compatible with the GNU C library. configure now checks for you.
1447 * You can now define a per-stream `fileno' function to convert the
1448 stream's cookie into an integral file descriptor.
1450 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1451 allocates zero bytes of storage, and returns a unique pointer which
1452 you can pass to `realloc' or `free'. The behavior is undefined if
1453 you dereference this pointer.
1455 * The C library now runs on Sony NEWS m68k machines running either
1456 NewsOS 3 or NewsOS 4.
1458 * The new `syscall' function is a system-dependent primitive function
1459 for invoking system calls. It has the canonical behavior on Unix
1460 systems, including unreliable return values for some calls (such as
1461 `pipe', `fork' and `getppid').
1463 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1464 to `EAGAIN', which is the preferred name. On systems whose kernels
1465 use two distinct codes, the C library now translates EWOULDBLOCK to
1466 EAGAIN in every system call function.
1467 \f
1468 Version 1.06
1470 * The GNU C Library Reference Manual is now distributed with the library.
1471 `make dvi' will produce a DVI file of the printed manual.
1472 `make info' will produce Info files that you can read on line using C-h i
1473 in Emacs or the `info' program.
1474 Please send comments on the manual to bug-glibc-manual@gnu.org.
1476 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1478 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1480 * Jason Merrill has contributed a port to the Sequent Symmetry running
1481 Dynix version 3 (i386-sequent-dynix).
1483 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1484 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1486 * New function `memory_warnings' lets you arrange to get warnings when
1487 malloc is running out of memory to allocate, like Emacs gives you.
1489 * The C library now contains the relocating allocator used in Emacs 19 for
1490 its editing buffers. This allocator (ralloc) minimizes allocation
1491 overhead and fragmentation by moving allocated regions around whenever it
1492 needs to. You always refer to a ralloc'd region with a "handle" (a
1493 pointer to a pointer--an object of type `void **').
1495 * There is a new `printf' format: `%m' gives you the string corresponding
1496 to the error code in `errno'.
1498 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1499 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1500 pass, the `a' modifier says to fill in a `char **' you pass with a
1501 malloc'd string.
1503 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1504 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1505 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1507 * `mkstemp' is a traditional Unix function to atomically create and open a
1508 uniquely-named temporary file.
1509 \f
1510 Version 1.05
1512 * The standard location for the file that says what the local timezone is
1513 has changed again. It is now `/usr/local/etc/localtime' (or more
1514 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1516 * The distribution no longer contains any files with names longer than 14
1517 characters.
1519 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1520 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1522 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1523 \f
1524 Version 1.04
1526 * The configuration process has changed quite a bit. The `configure'
1527 script is now used just like the configuration scripts for other GNU
1528 packages. The `sysdeps' directory hierarchy is much rearranged.
1529 The file `INSTALL' explains the new scheme in detail.
1531 * The header files no longer need to be processed into ANSI C and
1532 traditional C versions. There is just one set of files to install, and
1533 it will work with ANSI or old C compilers (including `gcc -traditional').
1535 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1536 MIPS DECStation running Ultrix 4.
1538 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1539 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1540 made itself into a shared library.
1542 * Yet further improved support for the i386, running 4.3 BSD-like systems
1543 (such as Mach 3 with the Unix single-server), or System V.
1545 * New function `strncasecmp' to do case-insensitive string comparison
1546 with limited length.
1548 * New function `strsep' is a reentrant alternative to `strtok'.
1550 * New functions `scandir' and `alphasort' for searching directories.
1552 * New function `setenv' is a better interface to `putenv'.
1554 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1555 function for traversing a directory tree.
1557 * The GNU obstack package is now also part of the C library.
1558 The new function `open_obstack_stream' creates a stdio stream that
1559 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1560 formatted output directly to an obstack.
1562 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1563 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1565 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1567 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1568 things to your strings.
1570 * There are some new test programs: test-fseek, testmb, and testrand.
1572 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1573 These ports are not finished, but are a good starting place for really
1574 supporting those systems.
1576 * `/etc/localtime' is now the standard location for the file that says what
1577 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1578 This follows the general principle that `/etc' is the place for all local
1579 configuration files.
1581 * The C library header files now use `extern "C"' when used by the C++
1582 compiler, so the C library should now work with C++ code.
1584 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1585 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1586 in <strings.h>.)
1588 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1589 function which uses the `merge sort' algorithm, and is said to be
1590 significantly faster than the old GNU `qsort' function. Merge sort is
1591 now the standard `qsort' function. The new algorithm can require a lot
1592 of temporary storage; so, the old sorting function is called when the
1593 required storage is not available.
1595 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1596 provides the Unix `crypt' function, plus some other entry points.
1598 * The code and header files taken from 4.4 BSD have been updated with the
1599 latest files released from Berkeley.
1600 \f
1601 ----------------------------------------------------------------------
1602 Copyright information:
1604 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1605 Free Software Foundation, Inc.
1607 Permission is granted to anyone to make or distribute verbatim copies
1608 of this document as received, in any medium, provided that the
1609 copyright notice and this permission notice are preserved,
1610 thus giving the recipient permission to redistribute in turn.
1612 Permission is granted to distribute modified versions
1613 of this document, or of portions of it,
1614 under the above conditions, provided also that they
1615 carry prominent notices stating who last changed them.
1616 \f
1617 Local variables:
1618 version-control: never
1619 End: