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1 GNU C Library NEWS -- history of user-visible changes. 2008-5-10
2 Copyright (C) 1992-2007, 2008 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 2.9
10 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
11 up at the same time.
12 \f
13 Version 2.8
15 * New locales: bo_CN, bo_IN.
17 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
19 * Sorting rules for some Indian languages (Devanagari and Gujarati).
20 Implemented by Pravin Satpute.
22 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
24 * nscd caches now all timeouts for DNS entries
25 Implemented by Ulrich Drepper.
27 * nscd is more efficient and wakes up less often.
28 Implemented by Ulrich Drepper.
30 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
31 vdprintf, and obstack_vprintf.
32 Implemented by Jakub Jelinek.
34 * Faster memset for x86-64.
35 Implemented by Harsha Jagasia and H.J. Lu.
37 * Faster memcpy on x86.
38 Implemented by Ulrich Drepper.
40 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
41 Implemented by Ulrich Drepper.
43 * Faster sqrt and sqrtf implemention for some PPC variants.
44 Implemented by Stephen Munroe.
45 \f
46 Version 2.7
48 * More checking functions: fread, fread_unlocked, open*, mq_open.
49 Implemented by Jakub Jelinek and Ulrich Drepper.
51 * Extend fortification to C++. Implemented by Jakub Jelinek.
53 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
54 by not recognizing 'a' as a modifier when those specs are requested.
55 Implemented by Jakub Jelinek.
57 * PPC optimizations to math and string functions.
58 Implemented by Steven Munroe.
60 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
61 options to be passed. Implemented by Ulrich Drepper.
63 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
65 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
66 Implemented by Ulrich Drepper.
68 * Handle private futexes in the NPTL implementation.
69 Implemented by Jakub Jelinek and Ulrich Drepper.
71 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
72 Implemented by Roland McGrath and Ulrich Drepper.
74 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
76 * SHA-256 and SHA-512 based password encryption.
77 Implemented by Ulrich Drepper.
79 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
80 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
81 yo_NG.
83 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
84 Implemented by Ulrich Drepper.
85 \f
86 Version 2.6
88 * New Linux interfaces: epoll_pwait, sched_getcpu.
90 * New generic interfaces: strerror_l.
92 * nscd can now cache the services database. Implemented by Ulrich Drepper.
94 \f
95 Version 2.5
97 * For Linux, the sorting of addresses returned by getaddrinfo now also
98 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
99 Implemented by Ulrich Drepper.
101 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
102 Implemented by Ulrich Drepper.
104 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
106 * New iconv module for MIK. Contributed by Alexander Shopov.
108 * For sites with broken group and/or passwd database, the auto-propagate
109 option of nscd can prevent creating ID lookup entries from the results
110 of a name lookup and vice versa. This usually is no problem but some
111 site might have problems with the default behavior.
112 Implemented by Ulrich Drepper.
114 * Iterating over entire database in NIS can be slow. With the
115 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
116 to trade time for memory. The entire database will be read at once.
117 Implemented by Ulrich Drepper.
119 * The interfaces introduced in RFC 3542 have been implemented by
120 Ulrich Drepper.
122 * Support for the new ELF hash table format was added by Ulrich Drepper.
124 * Support for priority inheritance mutexes added by Jakub Jelinek and
125 Ulrich Drepper.
127 * Support for priority protected mutexes added by Jakub Jelinek.
129 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
130 or_IN, csb_PL, fy_NL, sr_ME.
131 \f
132 Version 2.4
134 * More overflow detection functions.
136 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
137 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
139 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
140 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
141 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
142 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
143 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
144 by Masahide Washizawa.
146 * It is now possible to install audit libraries for the dynamic linker using
147 LD_AUDIT. Implemented by Ulrich Drepper.
149 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
150 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
151 For a libc and libpthread that works well on Linux 2.4 kernels, we
152 recommend using the stable 2.3 branch.
154 * The new function open_wmemstream acts like open_memstream,
155 but uses a wchar_t wide character buffer.
157 * The new function ppoll is an improved version of poll, similar to pselect.
159 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
160 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
161 renameat, unlinkat, linkat, symlinkat, readlinkat.
163 * New Linux kernel system calls: unshare,
164 inotify_init, inotify_add_watch, inotify_rm_watch.
166 * The euidaccess function is now also known by the alias eaccess,
167 for compatibility with some other systems.
169 * Timezone data updated to 2006b version.
170 \f
171 Version 2.3.6
173 * The following bugs are resolved with this release:
175 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
176 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
177 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
178 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
179 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
180 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
182 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
184 * As of this release, GCC 4 can be used to compile the C Library.
186 * Timezone data updated to 2005m version.
187 \f
188 Version 2.3.5
190 * The following bugs are resolved with this release:
192 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
193 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
194 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
195 777, 787, 821, 822, 823, 825
197 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
198 \f
199 Version 2.3.4
201 * Support for RFC 3678. Real implementations exist only for Linux so far.
202 Implemented by Ulrich Drepper.
204 * nscd can now cache entries persistently. Expiring entries are reloaded.
205 For speedups the cache can be shared in memory with client processes.
206 Implemented by Ulrich Drepper.
208 * nscd can now perform SELinux checks.
209 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
211 * getaddrinfo queries are now cached. Canonical name lookup is performed
212 efficiently.
213 Implemented by Ulrich Drepper.
215 * The nothrow function attribute is used when headers are used by gcc when
216 compiling C code. This can avoid significant amounts of exception
217 handling data.
219 * The malloc functions perform more error checking and are stricter when
220 it comes to reacting on errors. The default action is to terminate
221 the process after showing an error message. Implemented by Ulrich Drepper.
223 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
224 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
226 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
227 namespaces using the new function dlmopen(). This feature is of course,
228 like most other dynamic loading functionality, not available in statically
229 linked applications. Implemented by Ulrich Drepper.
231 * Low-overhead boundary checking variants of string and some stdio functions
232 were added. These are to be used in conjunction with a gcc patch by
233 Jakub Jelinek which adds calls to these functions if possible.
234 Implemented by Jakub Jelinek and Ulrich Drepper.
236 * Old code for several operating systems and machine architectures that
237 have not been in working condition in a long time have been removed from
238 the main source tree maintained by the GNU C Library's maintainers.
239 These files are now reside in the separate `ports' source module
240 that is usable as an add-on when building the library.
241 \f
242 Version 2.3.3
244 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
245 interrogate the dynamic linker, compatible with the Solaris interface.
247 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
248 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
250 * getifaddrs now uses the netlink interface on Linux to get its information.
251 Implemented by Thorsten Kukuk.
253 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
254 Implemented by Ulrich Drepper.
256 * support for non-executable stacks on x86 has been added. Changes mostly
257 by Roland McGrath.
259 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
260 and Ulrich Drepper.
262 * getaddrinfo now performs destination address selection according to
263 RFC 3484.
264 \f
265 Version 2.3.2
267 * Thread-safe interfaces for many functions that access locale data
268 were added in version 2.3, but these features were omitted from NEWS.
269 Many functions have variants with an `_l' suffix that take a `locale_t'
270 object as a parameter rather than consulting the current locale.
271 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
272 create and maintain `locale_t' objects. Additionally, the new function
273 `uselocale' sets "the current locale" (as used by functions not so
274 parameterized) set for an individual thread. These features were added
275 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
277 * The functions getresuid, getresgid, setresuid, and setresgid, which
278 have long been available on Linux, are now declared in <unistd.h>
279 and are now also available on the Hurd.
281 * ELF thread-local storage support (TLS) now works on x86-64.
283 * The new dynamic string token $LIB is expanded in shared library names.
284 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
286 * Aldy Hernandez contributed complete software floating point support for
287 PowerPC machines with no FPU.
289 * fexecve is implemented on Linux.
291 * The `btowc' function should work at least twice as fast due to
292 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
294 * With approriate thread add-ons cancelable functions are now implemented
295 in libc.so as well. No need to call the function in libpthread. This
296 change allowed to finally disable the incorrect and expensive handling
297 of weak definition in ld.so.
299 * Yet more PLT entries in libc.so have been removed. We finally arrived
300 at the bare minimum. Startup times improved appropriately.
302 * Support for the new Linux/x86 system call interface was added. The
303 AT_SYSINFO auxiliary vector entry is recognized and handled.
304 \f
305 Version 2.3
307 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
308 charsets.
310 * iconv (the program and the interface) now accepts empty names (excluding
311 options like //TRANSLIT) to mean "use charset of current locale".
313 * localedef can now transliterate characters in strings which are not in
314 the provided charmap. The information from the input locale is used.
316 * Prelinking support was added for ELF targets. This requires additional
317 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
319 * Read-only stdio streams now use mmap to speed up operation by eliminating
320 copying and buffer underflows. To use add 'm' to the mode string of
321 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
323 * The malloc functions were completely rewritten by Wolfram Gloger based
324 on Doug Lea's malloc-2.7.0.c.
326 * Isamu Hasegawa contributed a completely new and POSIX-conformant
327 implementation of regex.
329 * Bruno Haible upgraded the iconv and locale implementation to support
330 Unicode 3.2.
332 * Contents of the LC_* and LANG environment variables in the CEN style are
333 not recognized anymore. It never was used. Change by Ulrich Drepper.
335 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
336 thread-local storage (TLS) ABI on some platforms.
337 Changes by Ulrich Drepper. SH support by Kaz Kojima.
339 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
340 EUC-JISX0213, and TSCII.
342 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
343 BSD-compatible interface for getting all network interface addresses.
344 Implementation for IPv4 by Roland McGrath.
346 * Loading of locale data is faster due to the introduction of a locale
347 archive. Implemented by Roland McGrath and Ulrich Drepper.
349 * Startup times are significantly reduced by not using exported functions
350 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
351 and Ulrich Drepper.
353 * Steven Munroe contributed a port to PowerPC64/Linux.
354 \f
355 Version 2.2.6
357 * The Hurd now uses the GNU libio implementation of stdio rather than the
358 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
360 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
361 with the same behavior as the Linux system call of the same name.
362 \f
363 Version 2.2.5
365 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
366 128-bit long double format.
368 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
369 IBM1161, and IBM1162 charsets.
371 * Andreas Jaeger contributed a port to x86-64/Linux.
373 * Peter Bruin contributed a port to PowerPC/Hurd.
375 * libc functions using I/O streams now can handle wide-oriented streams
376 as well.
378 * optimizations in the dynamic linker. Binaries created by recent binutils
379 versions start up quicker due to reduced time spent on relocations.
381 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
382 \f
383 Version 2.2.4
385 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
386 asinh, atanh, j0 for the 128-bit long double format.
388 * Bruno Haible updated all the code handling Unicode in some form to
389 support Unicode 3.1.
391 * Speed of regex for single-byte locales is back to previous levels.
392 Patch by Isamu Hasegawa.
394 * Alpha, SPARC, and IA-64 now also using floating stacks.
396 * Startup time of internationalized applications greatly improved through
397 iconv cache. Use iconvconfig to generate the cache file.
398 Contributed by Ulrich Drepper.
400 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
401 severe performance problems. Patch by David Mosberger.
403 * The Hurd port got a lot more functionality like AIO, various stdio
404 extensions, etc. Mainly done by Roland McGrath.
406 * mtrace can now lookup symbols in shared libraries.
407 \f
408 Version 2.2.3
410 * Intel's IA-64 math library is largely integrated. It provides fast and
411 accurate implementatations for most basic and standard math functions
412 in float, double, and long double format.
414 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
415 and asin for the 96-bit long double format and asin, log, tan for the
416 128-bit long double format.
418 * The beginning of a last-bit accurate math library by IBM Haifa were added.
419 The basic double functions exist today. Contributed by Abraham Ziv
420 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
421 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
423 * An asynchronous name lookup library was added. The interface is designed
424 after POSIX AIO. The proposal was circulated beforehand to get comments.
425 No negative ones came in. Implemented by Ulrich Drepper.
427 * Port to S390/64bit contributed by Martin Schwidefsky
428 <schwidefsky@de.ibm.com>.
430 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
431 of functions for Linux/IA-64.
433 * The RPC code is now thread safe. Threads can now use the same service
434 of different services at the same time. Patch by Eric Norum
435 <eric.norum@usask.ca> with some help by Ulrich Drepper.
437 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
438 family of functions for Linux/S390.
440 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
441 of functions for Linux/x86.
443 * Port to Linux/CRIS contributed by Axis Communications.
444 \f
445 Version 2.2.2
447 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
448 we can now check for namespace violations and missing declarations. The
449 result is that almost all headers are now Unix-compliant (as defined in
450 the upcoming XPG6). The negative side is that some programs might need
451 corrections, too, if they depend on the incorrect form of the headers in
452 previous versions which defined too many symbols and included too many
453 other headers.
455 * regex now handles multibyte character sets correctly.
456 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
458 * iconv (the program) does now conform to the upcoming XPG6 and handles
459 charmaps. Instead of the charset names the path of charmaps can be
460 provided and the conversion happens based on this data.
461 Contributed by Ulrich Drepper.
463 * The locale program now provides detailed information about the installed
464 locales. While
466 locale -a
468 only lists the names of the supported locales
470 locale -a --verbose
472 provides details such as country, language, and codeset name.
473 Contributed by Ulrich Drepper.
474 \f
475 Version 2.2.1
477 * The gencat program now parses the input file according to the charset
478 selected by the LC_CTYPE category. This is important for stateful
479 character sets. To make generating catalogs easier there is a way
480 to overwrite the charset selected by the locale: before the first
481 message or $ quote line the catalog can contain a line like
483 $ codeset=ISO-8859-2
485 to select the charset (ISO-8859-2 in this case).
487 Implemented by Shinya Hanataka and Ulrich Drepper.
489 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
490 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
491 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
493 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
494 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
496 * The LANGUAGE environment variable is now ignored unless the locale is
497 changed from the default "C" locale.
499 * The usual bug fixes.
500 \f
501 Version 2.2
503 * Greg McGary added runtime support for bounds checking using gcc's
504 new -fbounded-pointers option. ix86 target is complete. PowerPC
505 is in progress.
507 * Thorsten Kukuk added secure mode support to nscd.
509 * The Berkeley db libraries have been removed.
511 Related, the nss_db module is now in a separate package since it
512 obviously requires a database library being available.
514 * Wide character I/O streams implemented by Ulrich Drepper.
516 * Functions from the extended socket API added by Ulrich Drepper.
518 * Functions feenableexcept and fedisableexcept to control the
519 behaviour of individual exceptions have been added by Andreas Jaeger.
521 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
523 * The resolver code has been updated from bind 8.2.3-T5B which supports
524 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
525 and Mark Kettenis.
527 This change could in some situations effect backward compatibility. Since
528 now `_res' is a thread-local instead of a global variable, modifying it
529 in one thread does not have any effect in other threads.
531 The resolver library was also extended to allow IPv6 as the transport
532 protocol for the requests. This work was done by Stig Venaas.
534 * Compatibility code for K&R C compilers has been removed from the
535 header files. A ISO C compiler is needed to use the library
536 (conforming to either C89 or C99 standard).
538 * Complete rewrite of the localedef program to support multibyte character
539 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
540 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
541 Implemented by Ulrich Drepper.
543 Bruno Haible significantly improved the generation and use of the data
544 structures for the wide character tables.
546 * Plural handling in gettext implemented by Ulrich Drepper.
548 * The utmp daemon has been removed.
550 * The port to MIPS-Linux has been finished by Andreas Jaeger.
552 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
553 and Yutaka Niibe.
555 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
557 * POSIX barriers implemented by Kaz Kylheku.
559 * POSIX spawn function family implemented by Ulrich Drepper.
561 * POSIX spinlocks are now available.
563 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
565 * the configure option --enable-kernel=X.Y.Z allows to strip out
566 compatibility for kernel versions before X.Y.Z. This is currently only
567 implemented for Linux.
569 * the sockaddr_in6 structure changed. The IPv6 working group added a new
570 field sin6_scope_id. This means that all programs using IPv6 should be
571 recompiled. Don't expect binary compatibility with previous glibc
572 versions.
574 * various conversion modules for IBM character sets contributed by
575 Masahide Washizawa.
577 * IA-64 port by Jes Sorensen and HJ Lu.
579 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
580 Compiling the GNU C Library for Linux/ia64
581 ******************************************
583 Please refer to the file INSTALL in the same directory as you found
584 this file for general information about configuring and compiling
585 glibc.
587 For general inquiries about glibc under Linux/ia64 please use the
588 following mailing list linux-ia64@linuxia64.org or one of the relevant
589 glibc mailing lists.
591 Recommended Tools for Compilation
592 =================================
594 In order for glibc-2.2 to build correctly on the ia64 you need at
595 least the following versions of the GNU tools (the :
597 * The Cygnus toolchain snapshot for the ia64 as of August 4
598 including the provided set of patches. It is however recommend
599 you use the October 24 toolchain snapshot or a more recent version.
601 OR alternatively you can try the following (the Cygnus toolchain is
602 the recommended solution):
604 * GCC and binutils, GAS and GNU LD out of CVS from
605 sources.redhat.com as of August 28, 2000 or later. The CVS tree
606 may require special patches to work properly on the ia64.
608 Configuring and compiling GNU Libc for Linux/ia64
609 =================================================
611 The library requires Linux kernel version 2.4.0-test4-000728 or
612 later to funtion properly. Besides that it support for debug libraries
613 is currently untested. Hence the following options
614 are required for configuring the library:
616 --disable-debug --enable-kernel=2.4.0
618 It is also important that you make sure the library picks up the
619 appropriate kernel header files, if you do not have recent enough
620 kernel headers in /usr/src/linux/include, you should use the
621 --with-headers=<path> option to specify the location.
623 As an example I personally use the following options to configure
624 the library:
626 --disable-debug
627 --disable-cvs
628 --enable-kernel=2.4.0
629 --host=ia64-linux
630 --enable-add-ons=yes
631 --prefix=/usr
632 --with-headers=/home/jes/linux/include
635 Good luck
637 Jes Sorensen <jes@linuxcare.com>,
638 November 14th, 2000
639 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
640 \f
641 Version 2.1.3
643 * bug fixes
645 \f
646 Version 2.1.2
648 * bug fixes
650 \f
651 Version 2.1.1
653 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
655 * New xdr functions are added; some rpc functions are now 64bit clean.
657 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
659 * Fixed known incompatibilities with glibc 2.0.
661 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
663 * Optimized a number of functions (especially the ELF dynamic loader).
665 * Update timezone data files.
667 * lots of charmaps corrections
669 * some new locale definitions and charmaps
671 \f
672 Version 2.1
674 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
675 conform to POSIX member type requirements. Symbol versions have been
676 adjusted as needed within the library, and for direct use by applications,
677 but there is potential for problems if third-party libraries use
678 struct timeval as part of their interface. This does not present
679 a problem for X and other "essential" system libraries.
681 * An additional locale model to support C++ Standard Library locale
682 model and probably more was implemented by Ulrich Drepper.
684 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
685 symbol level.
687 * Miles Bader provided the `argp' function family to support hierachical
688 command line argument parsing, layered on top of getopt.
690 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
692 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
693 numbers.
695 * scanf recognizes the %a and %A format for scanning floating point numbers.
697 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
698 information and interfaces for the available integer types.
700 * about 130 new math functions were added to implement the ISO C9x math
701 library.
703 * the new header <complex.h> contains definitions of the complex math
704 functions from ISO C 9X.
706 * the new header <tgmath.h> defines generic macros to use complex or
707 real valued functions.
709 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
711 * Andreas Jaeger provided a test suite for the math library.
713 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
715 * Ulrich Drepper added character set conversion functions (iconv).
717 * Optimized string functions have been added.
719 * The localedata addon is now part of glibc.
721 * An implementation of profiling shared libraries was added by Ulrich Drepper.
723 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
724 daemon for NSS (nscd).
726 Missing a better place here are some numbers on improvements. Under
727 Linux 2.1.125 un-tar-ing the kernel sources takes
729 user system wall
731 using local files 12.19s 6.88s 22.91s
733 using NIS 13.92s 8.91s 26.34s
735 using NIS & nscd 10.37s 7.34s 25.30s
737 using NIS+ 27.57s 30.37s 640.46s
739 using NIS+ & nscd 10.25s 7.83s 26.51s
741 using NIS & old nscd [1] 13.83s 8.32s 29.60s
743 Keep in mind that non-namelookup related operations dominate above times.
744 It was just a common complain that using NIS+ unpacking the kernel is
745 horribly slow.
747 [1] The old nscd implementation is not available anymore since it was
748 distributed with glibc up to version 2.0.98 and thus is now replaced.
750 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
752 * Mark Kettenis provided a Hesiod NSS module.
754 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
755 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
757 * rcmd can now handle netgroups (Dick Streefland).
759 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
760 Bambrough.
762 * Support for the IPv6 protocol has been added to the socket API, as per the
763 latest draft standards.
765 * Support for Linux 2.2 has been added.
767 * Interface changes relative to the latest 2.0.x release:
768 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
769 addseverity NEW: Unix98
770 alphasort64 NEW: LFS
771 argp_err_exit_status NEW: argp, GNU ext
772 argp_error NEW: argp, GNU ext
773 argp_failure NEW: argp, GNU ext
774 argp_help NEW: argp, GNU ext
775 argp_parse NEW: argp, GNU ext
776 argp_program_bug_address NEW: argp, GNU ext
777 argp_program_version NEW: argp, GNU ext
778 argp_program_version_hook NEW: argp, GNU ext
779 argp_state_help NEW: argp, GNU ext
780 argp_usage NEW: argp, GNU ext
781 authdes_create NEW: Secure RPC
782 authdes_getucred NEW: Secure RPC
783 authdes_pk_create NEW: Secure RPC
784 backtrace NEW: GNU ext.
785 backtrace_symbols NEW: GNU ext.
786 backtrace_symbols_fd NEW: GNU ext.
787 cacos NEW: ISO C 9x
788 cacosf NEW: ISO C 9x
789 cacosh NEW: ISO C 9x
790 cacoshf NEW: ISO C 9x
791 cacoshl NEW: ISO C 9x
792 cacosl NEW: ISO C 9x
793 capget NEW: kernel
794 capset NEW: kernel
795 carg NEW: ISO C 9x
796 cargf NEW: ISO C 9x
797 cargl NEW: ISO C 9x
798 casin NEW: ISO C 9x
799 casinf NEW: ISO C 9x
800 casinh NEW: ISO C 9x
801 casinhf NEW: ISO C 9x
802 casinhl NEW: ISO C 9x
803 casinl NEW: ISO C 9x
804 catan NEW: ISO C 9x
805 catanf NEW: ISO C 9x
806 catanh NEW: ISO C 9x
807 catanhf NEW: ISO C 9x
808 catanhl NEW: ISO C 9x
809 catanl NEW: ISO C 9x
810 cbc_crypt NEW: Secure RPC
811 ccos NEW: ISO C 9x
812 ccosf NEW: ISO C 9x
813 ccosh NEW: ISO C 9x
814 ccoshf NEW: ISO C 9x
815 ccoshl NEW: ISO C 9x
816 ccosl NEW: ISO C 9x
817 cexp NEW: ISO C 9x
818 cexpf NEW: ISO C 9x
819 cexpl NEW: ISO C 9x
820 cimag NEW: ISO C 9x
821 cimagf NEW: ISO C 9x
822 cimagl NEW: ISO C 9x
823 clearerr_locked REMOVED
824 clntunix_create NEW: sunrpc ext
825 clog NEW: ISO C 9x
826 clog10 NEW: ISO C 9x
827 clog10f NEW: ISO C 9x
828 clog10l NEW: ISO C 9x
829 clogf NEW: ISO C 9x
830 clogl NEW: ISO C 9x
831 conj NEW: ISO C 9x
832 conjf NEW: ISO C 9x
833 conjl NEW: ISO C 9x
834 cpow NEW: ISO C 9x
835 cpowf NEW: ISO C 9x
836 cpowl NEW: ISO C 9x
837 cproj NEW: ISO C 9x
838 cprojf NEW: ISO C 9x
839 cprojl NEW: ISO C 9x
840 creal NEW: ISO C 9x
841 crealf NEW: ISO C 9x
842 creall NEW: ISO C 9x
843 creat64 NEW: LFS
844 csin NEW: ISO C 9x
845 csinf NEW: ISO C 9x
846 csinh NEW: ISO C 9x
847 csinhf NEW: ISO C 9x
848 csinhl NEW: ISO C 9x
849 csinl NEW: ISO C 9x
850 csqrt NEW: ISO C 9x
851 csqrtf NEW: ISO C 9x
852 csqrtl NEW: ISO C 9x
853 ctan NEW: ISO C 9x
854 ctanf NEW: ISO C 9x
855 ctanh NEW: ISO C 9x
856 ctanhf NEW: ISO C 9x
857 ctanhl NEW: ISO C 9x
858 ctanl NEW: ISO C 9x
859 des_setparity NEW: Secure RPC
860 ecb_crypt NEW: Secure RPC
861 endutxent NEW: Unix98
862 exp10 NEW: ISO C 9x
863 exp10f NEW: ISO C 9x
864 exp10l NEW: ISO C 9x
865 exp2 NEW: ISO C 9x
866 exp2f NEW: ISO C 9x
867 exp2l NEW: ISO C 9x
868 fattach NEW: STREAMS
869 fdetach NEW: STREAMS
870 fdim NEW: ISO C 9x
871 fdimf NEW: ISO C 9x
872 fdiml NEW: ISO C 9x
873 feclearexcept NEW: ISO C 9x
874 fegetenv NEW: ISO C 9x
875 fegetexceptflag NEW: ISO C 9x
876 fegetround NEW: ISO C 9x
877 feholdexcept NEW: ISO C 9x
878 feof_locked REMOVED
879 feraiseexcept NEW: ISO C 9x
880 ferror_locked REMOVED
881 fesetenv NEW: ISO C 9x
882 fesetexceptflag NEW: ISO C 9x
883 fesetround NEW: ISO C 9x
884 fetestexcept NEW: ISO C 9x
885 feupdateenv NEW: ISO C 9x
886 fflush_locked REMOVED
887 ffsl NEW: GNU ext.
888 ffsll NEW: GNU ext.
889 fgetpos64 NEW: LFS
890 fgets_unlocked NEW: GNU ext.
891 fileno_locked REMOVED
892 fma NEW: ISO C 9x
893 fmaf NEW: ISO C 9x
894 fmal NEW: ISO C 9x
895 fmax NEW: ISO C 9x
896 fmaxf NEW: ISO C 9x
897 fmaxl NEW: ISO C 9x
898 fmin NEW: ISO C 9x
899 fminf NEW: ISO C 9x
900 fminl NEW: ISO C 9x
901 fmtmsg NEW: Unix98
902 fopen64 NEW: LFS
903 fputc_locked REMOVED
904 fputs_unlocked NEW: GNU ext.
905 fread_unlocked NEW: GNU ext.
906 freopen64 NEW: LFS
907 fseeko NEW: Unix98
908 fsetpos64 NEW: LFS
909 fstatfs64 NEW: LFS
910 fstatvfs NEW: Unix98
911 fstatvfs64 NEW: LFS
912 ftello NEW: Unix98
913 ftello64 NEW: LFS
914 ftruncate64 NEW: LFS
915 ftw64 NEW: LFS
916 fwrite_unlocked NEW: GNU ext.
917 gai_strerror NEW: IPv6
918 gamma_r REMOVED
919 gammaf_r REMOVED
920 gammal_r REMOVED
921 getchar_locked REMOVED
922 getdate NEW: Unix98
923 getdate_err NEW: Unix98
924 getdate_r NEW: GNU ext.
925 getmsg NEW: STREAMS
926 getnameinfo NEW: IPv6
927 getnetname NEW: Secure RPC
928 getpmsg NEW: STREAMS
929 getpt NEW: Unix98 PTY
930 getrlimit64 NEW: LFS
931 getutxent NEW: Unix98
932 getutxid NEW: Unix98
933 getutxline NEW: Unix98
934 glob64 NEW: GNU ext.
935 globfree64 NEW: GNU ext.
936 gnu_get_libc_release NEW: GNU ext.
937 gnu_get_libc_version NEW: GNU ext.
938 grantpt NEW: Unix98 PTY
939 host2netname NEW: Secure RPC
940 iconv NEW: iconv
941 iconv_close NEW: iconv
942 iconv_open NEW: iconv
943 if_freenameindex NEW: IPv6
944 if_indextoname NEW: IPv6
945 if_nameindex NEW: IPv6
946 if_nametoindex NEW: IPv6
947 in6addr_any NEW: IPv6
948 in6addr_loopback NEW: IPv6
949 inet6_isipv4mapped NEW: IPv6
950 isastream NEW: STREAMS
951 iswblank NEW: GNU ext.
952 key_decryptsession NEW: Secure RPC
953 key_decryptsession_pk NEW: Secure RPC
954 key_encryptsession NEW: Secure RPC
955 key_encryptsession_pk NEW: Secure RPC
956 key_gendes NEW: Secure RPC
957 key_get_conv NEW: Secure RPC
958 key_secretkey_is_set NEW: Secure RPC
959 key_setnet NEW: Secure RPC
960 key_setsecret NEW: Secure RPC
961 llrint NEW: ISO C 9x
962 llrintf NEW: ISO C 9x
963 llrintl NEW: ISO C 9x
964 llround NEW: ISO C 9x
965 llroundf NEW: ISO C 9x
966 llroundl NEW: ISO C 9x
967 log2 NEW: ISO C 9x
968 log2f NEW: ISO C 9x
969 log2l NEW: ISO C 9x
970 lrint NEW: ISO C 9x
971 lrintf NEW: ISO C 9x
972 lrintl NEW: ISO C 9x
973 lround NEW: ISO C 9x
974 lroundf NEW: ISO C 9x
975 lroundl NEW: ISO C 9x
976 lseek64 NEW: LFS
977 makecontext NEW: Unix98
978 mempcpy NEW: GNU ext.
979 mmap64 NEW: LFS
980 moncontrol REMOVED
981 modify_ldt NEW: kernel
982 nan NEW: ISO C 9x
983 nanf NEW: ISO C 9x
984 nanl NEW: ISO C 9x
985 nearbyint NEW: ISO C 9x
986 nearbyintf NEW: ISO C 9x
987 nearbyintl NEW: ISO C 9x
988 netname2host NEW: Secure RPC
989 netname2user NEW: Secure RPC
990 nexttoward NEW: ISO C 9x
991 nexttowardf NEW: ISO C 9x
992 nexttowardl NEW: ISO C 9x
993 nftw NEW: Unix98
994 nftw64 NEW: LFS
995 open64 NEW: LFS
996 passwd2des NEW: Secure RPC
997 pow10 NEW: GNU ext.
998 pow10f NEW: GNU ext.
999 pow10l NEW: GNU ext.
1000 pread NEW: Unix98
1001 pread64 NEW: LFS
1002 printf_size NEW: GNU ext.
1003 printf_size_info NEW: GNU ext.
1004 profil_counter REMOVED
1005 pthread_mutexattr_getkind_np REPLACED
1006 pthread_mutexattr_setkind_np REPLACED
1007 ptsname NEW: Unix98 PTY
1008 ptsname_r NEW: Unix98 PTY
1009 putc_locked REMOVED
1010 putchar_locked REMOVED
1011 putgrent NEW: GNU ext.
1012 putmsg NEW: STREAMS
1013 putpmsg NEW: STREAMS
1014 pututxline NEW: Unix98
1015 pwrite NEW: Unix98
1016 pwrite64 NEW: LFS
1017 readdir64 NEW: LFS
1018 readdir64_r NEW: LFS
1019 remquo NEW: ISO C 9x
1020 remquof NEW: ISO C 9x
1021 remquol NEW: ISO C 9x
1022 round NEW: ISO C 9x
1023 roundf NEW: ISO C 9x
1024 roundl NEW: ISO C 9x
1025 rtime NEW: GNU ext.
1026 scalbln NEW: ISO C 9x
1027 scalblnf NEW: ISO C 9x
1028 scalblnl NEW: ISO C 9x
1029 scandir64 NEW: LFS
1030 sendfile NEW: kernel
1031 setcontext NEW: Unix98
1032 setrlimit64 NEW: LFS
1033 setutxent NEW: Unix98
1034 sighold NEW: Unix98
1035 sigignore NEW: Unix98
1036 sigqueue NEW: POSIX.1b
1037 sigrelse NEW: Unix98
1038 sigset NEW: POSIX.1b
1039 sigtimedwait NEW: POSIX.1b
1040 sigwaitinfo NEW: POSIX.1b
1041 sincos NEW: GNU ext.
1042 sincosf NEW: GNU ext.
1043 sincosl NEW: GNU ext.
1044 statfs64 NEW: LFS
1045 statvfs NEW: Unix98
1046 statvfs64 NEW: LFS
1047 strcasestr NEW: GNU ext.
1048 strtoimax NEW: ISO C 9x
1049 strtoumax NEW: ISO C 9x
1050 strverscmp NEW: GNU ext.
1051 svcauthdes_stats NEW: Secure RPC
1052 svcunix_create NEW: sunrpc etx
1053 svcunixfd_create NEW: sunrpc ext
1054 swapcontext NEW: Unix98
1055 tcgetsid NEW: Unix98 PTY
1056 tdestroy NEW: GNU ext.
1057 tgamma NEW: ISO C 9x
1058 tgammaf NEW: ISO C 9x
1059 tgammal NEW: ISO C 9x
1060 tmpfile64 NEW: LFS
1061 trunc NEW: ISO C 9x
1062 truncate64 NEW: LFS
1063 truncf NEW: ISO C 9x
1064 truncl NEW: ISO C 9x
1065 umount2 NEW: kernel
1066 unlockpt NEW: Unix98 PTY
1067 updwtmpx NEW: Unix98
1068 user2netname NEW: Secure RPC
1069 utmpxname NEW: Unix98
1070 versionsort NEW: GNU ext.
1071 versionsort64 NEW: GNU ext.
1072 waitid NEW: Unix98
1073 wcscasecmp NEW: GNU ext.
1074 wcsncasecmp NEW: GNU ext.
1075 wcsnlen NEW: GNU ext.
1076 wcstoimax NEW: ISO C 9x
1077 wcstoll NEW: ISO C 9x
1078 wcstoull NEW: ISO C 9x
1079 wcstoumax NEW: ISO C 9x
1080 wcswcs NEW: Unix98
1081 wordexp NEW: POSIX.2
1082 wordfree NEW: POSIX.2
1083 write_profiling REMOVED
1084 xdecrypt NEW: Secure RPC
1085 xdr_authdes_cred NEW: Secure RPC
1086 xdr_authdes_verf NEW: Secure RPC
1087 xdr_cryptkeyarg NEW: Secure RPC
1088 xdr_cryptkeyarg2 NEW: Secure RPC
1089 xdr_cryptkeyres NEW: Secure RPC
1090 xdr_getcredres NEW: Secure RPC
1091 xdr_key_netstarg NEW: Secure RPC
1092 xdr_key_netstres NEW: Secure RPC
1093 xdr_keybuf NEW: Secure RPC
1094 xdr_keystatus NEW: Secure RPC
1095 xdr_netnamestr NEW: Secure RPC
1096 xdr_sizeof NEW: Secure RPC
1097 xdr_unixcred NEW: sunrpc ext
1098 xencrypt NEW: Secure RPC
1099 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1100 \f
1101 Version 2.0.6
1103 * more bug fixes
1105 \f
1106 Version 2.0.5
1108 * more bug fixes
1110 * inet_ntoa is thread-safe
1112 * updwtmp is moved from libutil to libc
1114 * rewrite of cbrt function
1116 * update of timezone data
1117 \f
1118 Version 2.0.4
1120 * more bug fixes
1121 \f
1122 Version 2.0.3
1124 * more bug fixes
1125 \f
1126 Version 2.0.2
1128 * more bug fixes
1130 * add atoll function
1132 * fix complex problems in Berkeley DB code
1134 * fix math functions
1135 \f
1136 Version 2.0.1
1138 * fixed lots of header problems (especially Linux/GNU specific)
1140 * dynamic loader preserves all registers
1142 * Roland McGrath provided support for handling of auxiliary objects in
1143 the ELF dynamic loader.
1145 * support for parallel builds is improved
1146 \f
1147 Version 2.0
1149 * GNU extensions are no longer declared by default. To enable them you
1150 must define the macro `_GNU_SOURCE' in your program or compile with
1151 `-D_GNU_SOURCE'.
1153 * The library has changed from using GNU ld symbol aliases to using weak
1154 symbols where available. The ELF object file format supports weak
1155 symbols; GNU ld also supports weak symbols in the a.out format. (There
1156 is also now support for other GNU ld extensions in ELF. Use the
1157 `--with-elf' option to configure to indicate you have ELF, and
1158 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1159 of many files which contained only symbol aliases, reducing the size of
1160 the source and the compiled library; many other files were renamed to
1161 less cryptic names previously occupied by the symbol alias files.
1162 There is a new header file <elf.h> for programs which operate on
1163 files in the ELF format.
1165 * Converted to Autoconf version 2, so `configure' has more options.
1166 Run `configure --help' to see the details.
1168 * The library can now be configured to build profiling, highly-optimized
1169 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1170 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1171 `configure' enable building these extra libraries. The shared library is
1172 built by default when using both ELF and GNU ld. When shared libraries
1173 are enabled, the new library `-ldl' is available for arbitrary run-time
1174 loading of shared objects; its interface is defined in <dlfcn.h>. The
1175 new header file <link.h> gives access to the internals of the run-time
1176 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1177 application of same name on other systems and it provides information
1178 about dynamically linked binaries.
1180 * The C library now provides the run-time support code for profiling
1181 executables compiled with `-pg'. Programs can control the profiling code
1182 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1183 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1184 the support for this file format was contributed by David Mosberger-Tang.
1186 * The math code has been replaced with a math library based on fdlibm from
1187 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1188 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1189 functions. The math functions now reside in a separate library, so
1190 programs using them will need to use `-lm' their linking commands.
1192 * John C. Bowman contributed optimized ix87 assembler inline functions.
1194 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1195 mechanism similar to that found in Solaris 2. This is now used for the
1196 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1197 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1198 file controls what services are used for each individual database. This
1199 works by loading shared libraries with names specified in `nsswitch.conf',
1200 so service modules can be changed or added at any time without even
1201 relinking any program. Currently there are the file, db, and NIS based
1202 NSS services available.
1204 * The new functions `strtoq' and `strtouq' parse integer values from
1205 strings, like `strtol' and `strtoul', but they return `long long int' and
1206 `unsigned long long int' values, respectively (64-bit quantities).
1208 * The new functions `strtof' and `strtold' parse floating-point values from
1209 strings, like `strtod', but they return `float' and `long double' values,
1210 respectively (on some machines `double' and `long double' are the same).
1212 * Ulrich Drepper has contributed new implementations of the floating-point
1213 printing and reading code used in the `printf' family of functions and
1214 `strtod', `strtof', and `strtold'. These new functions are perfectly
1215 accurate, and much faster than the old ones.
1217 * The implementation of the POSIX locale model was completely rewritten by
1218 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1219 to compile the POSIX locale definition.
1221 * The former dummy implementations of the strcoll and strxfrm function are
1222 now replaced by fully functional code contributed by Ulrich Drepper. The
1223 collation information comes from the POSIX locale definitions.
1225 * The new header <langinfo.h> defines an interface for accessing
1226 various locale-dependent data (using the locale chosen with `setlocale').
1228 * Ulrich Drepper has contributed a new suite of functions for operation on
1229 wide-character and multibyte-character strings, in <wchar.h>;
1230 and classification and case conversion of wide characters, in <wctype.h>.
1231 These new functions are conforming to the ISO C, Amendement 1 specification.
1233 * There is now a second implementation of the standard I/O library available.
1234 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1235 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1237 * You can now use positional parameter specifications in format strings
1238 for the `printf' and `scanf' families of functions. For example,
1239 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1240 ``Number 6, Mr Jones''. This is mainly useful when providing different
1241 format strings for different languages, whose grammars may dictate
1242 different orderings of the values being printed. To support this
1243 feature, the interface for `register_printf_handler' has changed; see
1244 the header file <printf.h> for details.
1246 * The `printf' and `scanf' families of functions now understand a new
1247 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1248 to group numbers as indicated by the locale; for `scanf' and friends, this
1249 says to accept as valid only a number with all the proper grouping
1250 separators in the right places. In the default "C" locale, numbers are
1251 not grouped; but locales for specific countries will define the usual
1252 conventions (i.e. separate thousands with `,' in the US locale).
1254 * The pgrp functions have been regularized, slightly incompatibly but much
1255 less confusingly. The core functions are now `getpgid' and `setpgid',
1256 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1257 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1258 provided for compatibility. There is no longer an incompatible `getpgrp'
1259 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1261 * The new header file <fts.h> and suite of functions simplify programs that
1262 operate on directory trees. This code comes from 4.4 BSD.
1264 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1265 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1266 NSS scheme used in glibc.
1268 * There is a new malloc debugging hook `__memalign_hook'.
1270 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1271 `unsigned int' in <sys/types.h>. These are for compatibility only and
1272 their use is discouraged.
1274 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1275 done differently, so that it works even without GNU ld.
1277 * New function `euidaccess' checks allowed access to a file like `access',
1278 but using the effective IDs instead of the real IDs.
1280 * The time zone data files have been updated for the latest and greatest
1281 local time conventions of the countries of the world.
1283 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1284 see <dirent.h>.
1286 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1287 for formatting floating-point numbers. They are provided only for
1288 compatibility; new programs should use `sprintf' instead. There are
1289 also equivalent function for the `long double' floating-point type and
1290 all functions also exist in a reentrant form.
1292 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1293 functions for maintaining the login-record files (primarily of use to
1294 system programs such as `login'), and convenient functions for
1295 allocating and initializing a pseudo-terminal (pty) device.
1297 * Ulrich Drepper has contributed new support for System V style
1298 shared memory and IPC on systems that support it.
1300 * Ulrich Drepper has contributed several miscellaneous new functions found
1301 in System V: The `hsearch' family of functions provide an effective
1302 implementation of hash tables; `a64l' and `l64a' provide a very simple
1303 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1304 number generator.
1306 * Ulrich Drepper has contributed new reentrant counterparts for the
1307 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1309 * Ulrich Drepper has contributed new, highly-optimized versions of several
1310 string functions for the i486/Pentium family of processors.
1312 * Ulrich Drepper has updated the Linux-specific code, based largely
1313 on work done in Hongjiu Lu's version of GNU libc for Linux.
1314 The GNU library now supports Linux versions 2.0.10 and later,
1315 using the ELF object file format (i[3456]86-*-linux).
1317 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1319 * David Mosberger-Tang and Richard Henderson have ported the C library
1320 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1321 dynamic linking support for ELF/Alpha.
1323 * Richard Henderson contributed several Alpha optimized assembler function
1324 for arithmetic and string handling.
1326 * Ulrich Drepper has contributed a new set of message catalog functions to
1327 support multiple languages using the <libintl.h> interface, for use with
1328 his new package GNU gettext. Translation volunteers have contributed
1329 catalogs of the library's messages in Spanish, German, and Korean.
1331 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1332 program and the `catgets' function for reading the catalog files it
1333 creates. (The <libintl.h> interface is preferred; we include the
1334 <nl_types.h> interface using `catgets' only for source compatibility with
1335 programs already written to use it.)
1337 * New header file <values.h> gives SVID-compatible names for <limits.h>
1338 constants.
1340 * Various new macros, declarations, and small header files for compatibility
1341 with 4.4 BSD.
1343 * New function `group_member' is a convenient way to check if a process has
1344 a given effective group ID.
1346 * When using GCC 2.7 and later, the socket functions are now declared in a
1347 special way so that passing an argument of type `struct sockaddr_in *',
1348 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1349 `struct sockaddr *' type, does not generate a type-clash warning.
1351 * New function `error' declared in header file <error.h> is a convenient
1352 function for printing error messages and optionally exiting; this is the
1353 canonical function used in GNU programs. The new functions `err', `warn',
1354 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1355 doing the same thing.
1357 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1358 POSIX.2 `glob' function to do ~ and {...} expansion.
1360 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1361 `clearenv' which is used in POSIX.9 is also available.
1363 * New function `getsid' returns session ID number on systems that support it.
1365 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1366 files <db.h> and <mpool.h> provide a rich set of functions for several
1367 types of simple databases stored in memory and in files, and <ndbm.h> is
1368 an old `ndbm'-compatible interface using the `db' functions. Link with
1369 `-ldb' to get these functions.
1371 * New macro `strdupa' copies a string like `strdup', but uses local stack
1372 space from `alloca' instead of dynamic heap space from `malloc'.
1374 * New function `strnlen' is like `strlen' but searches only a given maximum
1375 number of characters for the null terminator. `stpncpy', `strndup' and
1376 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1377 function.
1379 * New function `statfs' in header <sys/statfs.h>.
1381 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1382 provide convenient functions for operating on blocks of null-terminated
1383 strings.
1385 * A new suite of functions in <utmp.h> handle all the details of reading
1386 and writing the utmp file.
1388 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1389 Thorsten Kukuk.
1391 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1392 completely POSIX compliant and also implemented the extended functionality
1393 to handle alternate digit representation and alternate era date formats.
1395 * Ulrich Drepper provided an implementation of the `strptime' function
1396 defined in XPG4.2 which transforms a string into a `struct tm' value.
1398 * Paul Eggert provided the tzselect shell script as part of the timezone
1399 code. The shell script makes it easy to select the correct timezone
1400 specification.
1402 * The implementation of the malloc family of functions is completely replaced
1403 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1404 The implementation uses the mmap function (if available) and it is
1405 optimized for the use in multi threaded programs.
1407 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1408 functions. This new functionality is usable by specifying a special
1409 salt string and it is compatible with implementation on *BSD systems.
1411 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1412 `getsubopt' to handle second level command line options, `bsd_signal'
1413 to access BSD style `signal' functionality, the obsolete `regexp' style
1414 expression matcher.
1416 * the `lchown' function is available on system which support this
1417 functionality.
1419 * The implementation of the shadow password handling function was contributed
1420 by Ulrich Drepper.
1422 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1424 * POSIX.1g support was added. The <sys/select.h> header is available,
1425 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1426 implementation of `getaddrinfo'.
1427 \f
1428 Version 1.09
1430 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1432 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1433 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1435 * The new function `daemon' from 4.4 BSD is useful for server programs that
1436 want to put themselves in the background.
1438 * Joel Sherrill has contributed support for several standalone boards that
1439 run without an operating system.
1441 * `printf', `scanf' and friends now accept a `q' type modifier for long
1442 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1444 * All of the code taken from BSD (notably most of the math and networking
1445 routines) has been updated from the BSD 4.4-Lite release.
1447 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1449 * The new functions `getdomainname' and `setdomainname' fetch or change the
1450 YP/NIS domain name. These are system calls which exist on systems which
1451 have YP (aka NIS).
1453 * The time zone data files have been updated for the latest international
1454 conventions.
1456 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1457 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1458 \f
1459 Version 1.08
1461 * The C library now includes support for Sun RPC, from Sun's free
1462 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1463 are included. (There is still no support for YP.)
1465 * Tom Quinn has contributed a port of the C library to SGI machines running
1466 Irix 4 (mips-sgi-irix4).
1468 * The new `lockf' function is a simplified interface to the locking
1469 facilities of `fcntl', included for compatibility.
1471 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1473 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1475 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1476 compatibility.
1478 * The error message printed by `assert' for a failed assertion now includes
1479 the name of the program (if using GNU ld) and the name of the calling
1480 function (with versions of GCC that support this).
1482 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1484 * The library now includes the <sys/mman.h> header file and memory
1485 management functions `mmap', `munmap', `mprotect', `msync', and
1486 `madvise', on systems that support those facilities.
1488 * The interface for `mcheck' has changed slightly: the function called to
1489 abort the program when an allocation inconsistency is detected now takes
1490 an argument that indicates the type of failure. The new function
1491 `mprobe' lets you request a consistency check for a particular block at
1492 any time (checks are normally done only when you call `free' or `realloc'
1493 on a block).
1495 * It is now possible to easily cross-compile the C library, building on one
1496 system a library to run on another machine and/or operating system. All
1497 you need to do is set the variable `HOST_CC' in `configparms' to the
1498 native compiler for programs to run on the machine you are building on (a
1499 few generator programs are used on Unix systems); set `CC' to the
1500 cross-compiler.
1502 * The new function `fexecve' (only implemented on the GNU system) executes
1503 a program file given a file descriptor already open on the file.
1504 \f
1505 Version 1.07
1507 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1508 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1510 * You can set the variable `libprefix' in `configparms' to specify a prefix
1511 to be prepended to installed library files; this makes it easy to install
1512 the GNU C library to be linked as `-lgnuc' or whatever.
1514 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1515 copies a limited number of characters from a string, and returns the
1516 address of the last character written.
1518 * You no longer need to check for whether the installed `stddef.h' is
1519 compatible with the GNU C library. configure now checks for you.
1521 * You can now define a per-stream `fileno' function to convert the
1522 stream's cookie into an integral file descriptor.
1524 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1525 allocates zero bytes of storage, and returns a unique pointer which
1526 you can pass to `realloc' or `free'. The behavior is undefined if
1527 you dereference this pointer.
1529 * The C library now runs on Sony NEWS m68k machines running either
1530 NewsOS 3 or NewsOS 4.
1532 * The new `syscall' function is a system-dependent primitive function
1533 for invoking system calls. It has the canonical behavior on Unix
1534 systems, including unreliable return values for some calls (such as
1535 `pipe', `fork' and `getppid').
1537 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1538 to `EAGAIN', which is the preferred name. On systems whose kernels
1539 use two distinct codes, the C library now translates EWOULDBLOCK to
1540 EAGAIN in every system call function.
1541 \f
1542 Version 1.06
1544 * The GNU C Library Reference Manual is now distributed with the library.
1545 `make dvi' will produce a DVI file of the printed manual.
1546 `make info' will produce Info files that you can read on line using C-h i
1547 in Emacs or the `info' program.
1548 Please send comments on the manual to bug-glibc-manual@gnu.org.
1550 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1552 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1554 * Jason Merrill has contributed a port to the Sequent Symmetry running
1555 Dynix version 3 (i386-sequent-dynix).
1557 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1558 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1560 * New function `memory_warnings' lets you arrange to get warnings when
1561 malloc is running out of memory to allocate, like Emacs gives you.
1563 * The C library now contains the relocating allocator used in Emacs 19 for
1564 its editing buffers. This allocator (ralloc) minimizes allocation
1565 overhead and fragmentation by moving allocated regions around whenever it
1566 needs to. You always refer to a ralloc'd region with a "handle" (a
1567 pointer to a pointer--an object of type `void **').
1569 * There is a new `printf' format: `%m' gives you the string corresponding
1570 to the error code in `errno'.
1572 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1573 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1574 pass, the `a' modifier says to fill in a `char **' you pass with a
1575 malloc'd string.
1577 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1578 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1579 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1581 * `mkstemp' is a traditional Unix function to atomically create and open a
1582 uniquely-named temporary file.
1583 \f
1584 Version 1.05
1586 * The standard location for the file that says what the local timezone is
1587 has changed again. It is now `/usr/local/etc/localtime' (or more
1588 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1590 * The distribution no longer contains any files with names longer than 14
1591 characters.
1593 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1594 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1596 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1597 \f
1598 Version 1.04
1600 * The configuration process has changed quite a bit. The `configure'
1601 script is now used just like the configuration scripts for other GNU
1602 packages. The `sysdeps' directory hierarchy is much rearranged.
1603 The file `INSTALL' explains the new scheme in detail.
1605 * The header files no longer need to be processed into ANSI C and
1606 traditional C versions. There is just one set of files to install, and
1607 it will work with ANSI or old C compilers (including `gcc -traditional').
1609 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1610 MIPS DECStation running Ultrix 4.
1612 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1613 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1614 made itself into a shared library.
1616 * Yet further improved support for the i386, running 4.3 BSD-like systems
1617 (such as Mach 3 with the Unix single-server), or System V.
1619 * New function `strncasecmp' to do case-insensitive string comparison
1620 with limited length.
1622 * New function `strsep' is a reentrant alternative to `strtok'.
1624 * New functions `scandir' and `alphasort' for searching directories.
1626 * New function `setenv' is a better interface to `putenv'.
1628 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1629 function for traversing a directory tree.
1631 * The GNU obstack package is now also part of the C library.
1632 The new function `open_obstack_stream' creates a stdio stream that
1633 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1634 formatted output directly to an obstack.
1636 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1637 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1639 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1641 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1642 things to your strings.
1644 * There are some new test programs: test-fseek, testmb, and testrand.
1646 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1647 These ports are not finished, but are a good starting place for really
1648 supporting those systems.
1650 * `/etc/localtime' is now the standard location for the file that says what
1651 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1652 This follows the general principle that `/etc' is the place for all local
1653 configuration files.
1655 * The C library header files now use `extern "C"' when used by the C++
1656 compiler, so the C library should now work with C++ code.
1658 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1659 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1660 in <strings.h>.)
1662 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1663 function which uses the `merge sort' algorithm, and is said to be
1664 significantly faster than the old GNU `qsort' function. Merge sort is
1665 now the standard `qsort' function. The new algorithm can require a lot
1666 of temporary storage; so, the old sorting function is called when the
1667 required storage is not available.
1669 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1670 provides the Unix `crypt' function, plus some other entry points.
1672 * The code and header files taken from 4.4 BSD have been updated with the
1673 latest files released from Berkeley.
1674 \f
1675 ----------------------------------------------------------------------
1676 Copyright information:
1678 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1679 Free Software Foundation, Inc.
1681 Permission is granted to anyone to make or distribute verbatim copies
1682 of this document as received, in any medium, provided that the
1683 copyright notice and this permission notice are preserved,
1684 thus giving the recipient permission to redistribute in turn.
1686 Permission is granted to distribute modified versions
1687 of this document, or of portions of it,
1688 under the above conditions, provided also that they
1689 carry prominent notices stating who last changed them.
1690 \f
1691 Local variables:
1692 version-control: never
1693 End: