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1 GNU C Library NEWS -- history of user-visible changes. 2008-10-31
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. Implemented by Ulrich Drepper.
13 * TLS descriptors for LD and GD on x86 and x86-64.
14 Implemented by Alexandre Oliva.
16 * getaddrinfo now handles DCCP and UDPlite.
17 Implemented by Ulrich Drepper.
19 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
20 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
21 Implemented by Ulrich Drepper.
23 * New implementation of memmem, strstr, and strcasestr which is O(n).
24 Implemented by Eric Blake.
26 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
28 * Implement "e" option for popen to open file descriptor with the
29 close-on-exec flag set. Implemented by Ulrich Drepper.
31 * Implement "b" mode for fmemopen. In this mode writes writes don't
32 implicitly add a NUL byte and seeks from the end of the buffer really
33 use the buffer end, not the string length as the basis.
34 Implemented by Ulrich Drepper.
36 * Many functions, exported and internal, now atomically set the close-on-exec
37 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
39 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
40 Sinhala)
41 Implemented by Pravin Satpute.
43 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
44 \f
45 Version 2.8
47 * New locales: bo_CN, bo_IN, shs_CA.
49 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
51 * Sorting rules for some Indian languages (Devanagari and Gujarati).
52 Implemented by Pravin Satpute.
54 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
56 * nscd caches now all timeouts for DNS entries
57 Implemented by Ulrich Drepper.
59 * nscd is more efficient and wakes up less often.
60 Implemented by Ulrich Drepper.
62 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
63 vdprintf, and obstack_vprintf.
64 Implemented by Jakub Jelinek.
66 * Faster memset for x86-64.
67 Implemented by Harsha Jagasia and H.J. Lu.
69 * Faster memcpy on x86.
70 Implemented by Ulrich Drepper.
72 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
73 Implemented by Ulrich Drepper.
75 * Faster sqrt and sqrtf implemention for some PPC variants.
76 Implemented by Stephen Munroe.
77 \f
78 Version 2.7
80 * More checking functions: fread, fread_unlocked, open*, mq_open.
81 Implemented by Jakub Jelinek and Ulrich Drepper.
83 * Extend fortification to C++. Implemented by Jakub Jelinek.
85 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
86 by not recognizing 'a' as a modifier when those specs are requested.
87 Implemented by Jakub Jelinek.
89 * PPC optimizations to math and string functions.
90 Implemented by Steven Munroe.
92 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
93 options to be passed. Implemented by Ulrich Drepper.
95 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
97 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
98 Implemented by Ulrich Drepper.
100 * Handle private futexes in the NPTL implementation.
101 Implemented by Jakub Jelinek and Ulrich Drepper.
103 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
104 Implemented by Roland McGrath and Ulrich Drepper.
106 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
108 * SHA-256 and SHA-512 based password encryption.
109 Implemented by Ulrich Drepper.
111 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
112 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
113 yo_NG.
115 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
116 Implemented by Ulrich Drepper.
117 \f
118 Version 2.6
120 * New Linux interfaces: epoll_pwait, sched_getcpu.
122 * New generic interfaces: strerror_l.
124 * nscd can now cache the services database. Implemented by Ulrich Drepper.
126 \f
127 Version 2.5
129 * For Linux, the sorting of addresses returned by getaddrinfo now also
130 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
131 Implemented by Ulrich Drepper.
133 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
134 Implemented by Ulrich Drepper.
136 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
138 * New iconv module for MIK. Contributed by Alexander Shopov.
140 * For sites with broken group and/or passwd database, the auto-propagate
141 option of nscd can prevent creating ID lookup entries from the results
142 of a name lookup and vice versa. This usually is no problem but some
143 site might have problems with the default behavior.
144 Implemented by Ulrich Drepper.
146 * Iterating over entire database in NIS can be slow. With the
147 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
148 to trade time for memory. The entire database will be read at once.
149 Implemented by Ulrich Drepper.
151 * The interfaces introduced in RFC 3542 have been implemented by
152 Ulrich Drepper.
154 * Support for the new ELF hash table format was added by Ulrich Drepper.
156 * Support for priority inheritance mutexes added by Jakub Jelinek and
157 Ulrich Drepper.
159 * Support for priority protected mutexes added by Jakub Jelinek.
161 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
162 or_IN, csb_PL, fy_NL, sr_ME.
163 \f
164 Version 2.4
166 * More overflow detection functions.
168 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
169 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
171 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
172 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
173 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
174 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
175 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
176 by Masahide Washizawa.
178 * It is now possible to install audit libraries for the dynamic linker using
179 LD_AUDIT. Implemented by Ulrich Drepper.
181 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
182 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
183 For a libc and libpthread that works well on Linux 2.4 kernels, we
184 recommend using the stable 2.3 branch.
186 * The new function open_wmemstream acts like open_memstream,
187 but uses a wchar_t wide character buffer.
189 * The new function ppoll is an improved version of poll, similar to pselect.
191 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
192 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
193 renameat, unlinkat, linkat, symlinkat, readlinkat.
195 * New Linux kernel system calls: unshare,
196 inotify_init, inotify_add_watch, inotify_rm_watch.
198 * The euidaccess function is now also known by the alias eaccess,
199 for compatibility with some other systems.
201 * Timezone data updated to 2006b version.
202 \f
203 Version 2.3.6
205 * The following bugs are resolved with this release:
207 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
208 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
209 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
210 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
211 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
212 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
214 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
216 * As of this release, GCC 4 can be used to compile the C Library.
218 * Timezone data updated to 2005m version.
219 \f
220 Version 2.3.5
222 * The following bugs are resolved with this release:
224 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
225 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
226 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
227 777, 787, 821, 822, 823, 825
229 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
230 \f
231 Version 2.3.4
233 * Support for RFC 3678. Real implementations exist only for Linux so far.
234 Implemented by Ulrich Drepper.
236 * nscd can now cache entries persistently. Expiring entries are reloaded.
237 For speedups the cache can be shared in memory with client processes.
238 Implemented by Ulrich Drepper.
240 * nscd can now perform SELinux checks.
241 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
243 * getaddrinfo queries are now cached. Canonical name lookup is performed
244 efficiently.
245 Implemented by Ulrich Drepper.
247 * The nothrow function attribute is used when headers are used by gcc when
248 compiling C code. This can avoid significant amounts of exception
249 handling data.
251 * The malloc functions perform more error checking and are stricter when
252 it comes to reacting on errors. The default action is to terminate
253 the process after showing an error message. Implemented by Ulrich Drepper.
255 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
256 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
258 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
259 namespaces using the new function dlmopen(). This feature is of course,
260 like most other dynamic loading functionality, not available in statically
261 linked applications. Implemented by Ulrich Drepper.
263 * Low-overhead boundary checking variants of string and some stdio functions
264 were added. These are to be used in conjunction with a gcc patch by
265 Jakub Jelinek which adds calls to these functions if possible.
266 Implemented by Jakub Jelinek and Ulrich Drepper.
268 * Old code for several operating systems and machine architectures that
269 have not been in working condition in a long time have been removed from
270 the main source tree maintained by the GNU C Library's maintainers.
271 These files are now reside in the separate `ports' source module
272 that is usable as an add-on when building the library.
273 \f
274 Version 2.3.3
276 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
277 interrogate the dynamic linker, compatible with the Solaris interface.
279 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
280 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
282 * getifaddrs now uses the netlink interface on Linux to get its information.
283 Implemented by Thorsten Kukuk.
285 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
286 Implemented by Ulrich Drepper.
288 * support for non-executable stacks on x86 has been added. Changes mostly
289 by Roland McGrath.
291 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
292 and Ulrich Drepper.
294 * getaddrinfo now performs destination address selection according to
295 RFC 3484.
296 \f
297 Version 2.3.2
299 * Thread-safe interfaces for many functions that access locale data
300 were added in version 2.3, but these features were omitted from NEWS.
301 Many functions have variants with an `_l' suffix that take a `locale_t'
302 object as a parameter rather than consulting the current locale.
303 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
304 create and maintain `locale_t' objects. Additionally, the new function
305 `uselocale' sets "the current locale" (as used by functions not so
306 parameterized) set for an individual thread. These features were added
307 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
309 * The functions getresuid, getresgid, setresuid, and setresgid, which
310 have long been available on Linux, are now declared in <unistd.h>
311 and are now also available on the Hurd.
313 * ELF thread-local storage support (TLS) now works on x86-64.
315 * The new dynamic string token $LIB is expanded in shared library names.
316 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
318 * Aldy Hernandez contributed complete software floating point support for
319 PowerPC machines with no FPU.
321 * fexecve is implemented on Linux.
323 * The `btowc' function should work at least twice as fast due to
324 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
326 * With approriate thread add-ons cancelable functions are now implemented
327 in libc.so as well. No need to call the function in libpthread. This
328 change allowed to finally disable the incorrect and expensive handling
329 of weak definition in ld.so.
331 * Yet more PLT entries in libc.so have been removed. We finally arrived
332 at the bare minimum. Startup times improved appropriately.
334 * Support for the new Linux/x86 system call interface was added. The
335 AT_SYSINFO auxiliary vector entry is recognized and handled.
336 \f
337 Version 2.3
339 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
340 charsets.
342 * iconv (the program and the interface) now accepts empty names (excluding
343 options like //TRANSLIT) to mean "use charset of current locale".
345 * localedef can now transliterate characters in strings which are not in
346 the provided charmap. The information from the input locale is used.
348 * Prelinking support was added for ELF targets. This requires additional
349 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
351 * Read-only stdio streams now use mmap to speed up operation by eliminating
352 copying and buffer underflows. To use add 'm' to the mode string of
353 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
355 * The malloc functions were completely rewritten by Wolfram Gloger based
356 on Doug Lea's malloc-2.7.0.c.
358 * Isamu Hasegawa contributed a completely new and POSIX-conformant
359 implementation of regex.
361 * Bruno Haible upgraded the iconv and locale implementation to support
362 Unicode 3.2.
364 * Contents of the LC_* and LANG environment variables in the CEN style are
365 not recognized anymore. It never was used. Change by Ulrich Drepper.
367 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
368 thread-local storage (TLS) ABI on some platforms.
369 Changes by Ulrich Drepper. SH support by Kaz Kojima.
371 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
372 EUC-JISX0213, and TSCII.
374 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
375 BSD-compatible interface for getting all network interface addresses.
376 Implementation for IPv4 by Roland McGrath.
378 * Loading of locale data is faster due to the introduction of a locale
379 archive. Implemented by Roland McGrath and Ulrich Drepper.
381 * Startup times are significantly reduced by not using exported functions
382 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
383 and Ulrich Drepper.
385 * Steven Munroe contributed a port to PowerPC64/Linux.
386 \f
387 Version 2.2.6
389 * The Hurd now uses the GNU libio implementation of stdio rather than the
390 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
392 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
393 with the same behavior as the Linux system call of the same name.
394 \f
395 Version 2.2.5
397 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
398 128-bit long double format.
400 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
401 IBM1161, and IBM1162 charsets.
403 * Andreas Jaeger contributed a port to x86-64/Linux.
405 * Peter Bruin contributed a port to PowerPC/Hurd.
407 * libc functions using I/O streams now can handle wide-oriented streams
408 as well.
410 * optimizations in the dynamic linker. Binaries created by recent binutils
411 versions start up quicker due to reduced time spent on relocations.
413 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
414 \f
415 Version 2.2.4
417 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
418 asinh, atanh, j0 for the 128-bit long double format.
420 * Bruno Haible updated all the code handling Unicode in some form to
421 support Unicode 3.1.
423 * Speed of regex for single-byte locales is back to previous levels.
424 Patch by Isamu Hasegawa.
426 * Alpha, SPARC, and IA-64 now also using floating stacks.
428 * Startup time of internationalized applications greatly improved through
429 iconv cache. Use iconvconfig to generate the cache file.
430 Contributed by Ulrich Drepper.
432 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
433 severe performance problems. Patch by David Mosberger.
435 * The Hurd port got a lot more functionality like AIO, various stdio
436 extensions, etc. Mainly done by Roland McGrath.
438 * mtrace can now lookup symbols in shared libraries.
439 \f
440 Version 2.2.3
442 * Intel's IA-64 math library is largely integrated. It provides fast and
443 accurate implementatations for most basic and standard math functions
444 in float, double, and long double format.
446 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
447 and asin for the 96-bit long double format and asin, log, tan for the
448 128-bit long double format.
450 * The beginning of a last-bit accurate math library by IBM Haifa were added.
451 The basic double functions exist today. Contributed by Abraham Ziv
452 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
453 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
455 * An asynchronous name lookup library was added. The interface is designed
456 after POSIX AIO. The proposal was circulated beforehand to get comments.
457 No negative ones came in. Implemented by Ulrich Drepper.
459 * Port to S390/64bit contributed by Martin Schwidefsky
460 <schwidefsky@de.ibm.com>.
462 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
463 of functions for Linux/IA-64.
465 * The RPC code is now thread safe. Threads can now use the same service
466 of different services at the same time. Patch by Eric Norum
467 <eric.norum@usask.ca> with some help by Ulrich Drepper.
469 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
470 family of functions for Linux/S390.
472 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
473 of functions for Linux/x86.
475 * Port to Linux/CRIS contributed by Axis Communications.
476 \f
477 Version 2.2.2
479 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
480 we can now check for namespace violations and missing declarations. The
481 result is that almost all headers are now Unix-compliant (as defined in
482 the upcoming XPG6). The negative side is that some programs might need
483 corrections, too, if they depend on the incorrect form of the headers in
484 previous versions which defined too many symbols and included too many
485 other headers.
487 * regex now handles multibyte character sets correctly.
488 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
490 * iconv (the program) does now conform to the upcoming XPG6 and handles
491 charmaps. Instead of the charset names the path of charmaps can be
492 provided and the conversion happens based on this data.
493 Contributed by Ulrich Drepper.
495 * The locale program now provides detailed information about the installed
496 locales. While
498 locale -a
500 only lists the names of the supported locales
502 locale -a --verbose
504 provides details such as country, language, and codeset name.
505 Contributed by Ulrich Drepper.
506 \f
507 Version 2.2.1
509 * The gencat program now parses the input file according to the charset
510 selected by the LC_CTYPE category. This is important for stateful
511 character sets. To make generating catalogs easier there is a way
512 to overwrite the charset selected by the locale: before the first
513 message or $ quote line the catalog can contain a line like
515 $ codeset=ISO-8859-2
517 to select the charset (ISO-8859-2 in this case).
519 Implemented by Shinya Hanataka and Ulrich Drepper.
521 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
522 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
523 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
525 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
526 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
528 * The LANGUAGE environment variable is now ignored unless the locale is
529 changed from the default "C" locale.
531 * The usual bug fixes.
532 \f
533 Version 2.2
535 * Greg McGary added runtime support for bounds checking using gcc's
536 new -fbounded-pointers option. ix86 target is complete. PowerPC
537 is in progress.
539 * Thorsten Kukuk added secure mode support to nscd.
541 * The Berkeley db libraries have been removed.
543 Related, the nss_db module is now in a separate package since it
544 obviously requires a database library being available.
546 * Wide character I/O streams implemented by Ulrich Drepper.
548 * Functions from the extended socket API added by Ulrich Drepper.
550 * Functions feenableexcept and fedisableexcept to control the
551 behaviour of individual exceptions have been added by Andreas Jaeger.
553 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
555 * The resolver code has been updated from bind 8.2.3-T5B which supports
556 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
557 and Mark Kettenis.
559 This change could in some situations effect backward compatibility. Since
560 now `_res' is a thread-local instead of a global variable, modifying it
561 in one thread does not have any effect in other threads.
563 The resolver library was also extended to allow IPv6 as the transport
564 protocol for the requests. This work was done by Stig Venaas.
566 * Compatibility code for K&R C compilers has been removed from the
567 header files. A ISO C compiler is needed to use the library
568 (conforming to either C89 or C99 standard).
570 * Complete rewrite of the localedef program to support multibyte character
571 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
572 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
573 Implemented by Ulrich Drepper.
575 Bruno Haible significantly improved the generation and use of the data
576 structures for the wide character tables.
578 * Plural handling in gettext implemented by Ulrich Drepper.
580 * The utmp daemon has been removed.
582 * The port to MIPS-Linux has been finished by Andreas Jaeger.
584 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
585 and Yutaka Niibe.
587 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
589 * POSIX barriers implemented by Kaz Kylheku.
591 * POSIX spawn function family implemented by Ulrich Drepper.
593 * POSIX spinlocks are now available.
595 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
597 * the configure option --enable-kernel=X.Y.Z allows to strip out
598 compatibility for kernel versions before X.Y.Z. This is currently only
599 implemented for Linux.
601 * the sockaddr_in6 structure changed. The IPv6 working group added a new
602 field sin6_scope_id. This means that all programs using IPv6 should be
603 recompiled. Don't expect binary compatibility with previous glibc
604 versions.
606 * various conversion modules for IBM character sets contributed by
607 Masahide Washizawa.
609 * IA-64 port by Jes Sorensen and HJ Lu.
611 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
612 Compiling the GNU C Library for Linux/ia64
613 ******************************************
615 Please refer to the file INSTALL in the same directory as you found
616 this file for general information about configuring and compiling
617 glibc.
619 For general inquiries about glibc under Linux/ia64 please use the
620 following mailing list linux-ia64@linuxia64.org or one of the relevant
621 glibc mailing lists.
623 Recommended Tools for Compilation
624 =================================
626 In order for glibc-2.2 to build correctly on the ia64 you need at
627 least the following versions of the GNU tools (the :
629 * The Cygnus toolchain snapshot for the ia64 as of August 4
630 including the provided set of patches. It is however recommend
631 you use the October 24 toolchain snapshot or a more recent version.
633 OR alternatively you can try the following (the Cygnus toolchain is
634 the recommended solution):
636 * GCC and binutils, GAS and GNU LD out of CVS from
637 sources.redhat.com as of August 28, 2000 or later. The CVS tree
638 may require special patches to work properly on the ia64.
640 Configuring and compiling GNU Libc for Linux/ia64
641 =================================================
643 The library requires Linux kernel version 2.4.0-test4-000728 or
644 later to funtion properly. Besides that it support for debug libraries
645 is currently untested. Hence the following options
646 are required for configuring the library:
648 --disable-debug --enable-kernel=2.4.0
650 It is also important that you make sure the library picks up the
651 appropriate kernel header files, if you do not have recent enough
652 kernel headers in /usr/src/linux/include, you should use the
653 --with-headers=<path> option to specify the location.
655 As an example I personally use the following options to configure
656 the library:
658 --disable-debug
659 --disable-cvs
660 --enable-kernel=2.4.0
661 --host=ia64-linux
662 --enable-add-ons=yes
663 --prefix=/usr
664 --with-headers=/home/jes/linux/include
667 Good luck
669 Jes Sorensen <jes@linuxcare.com>,
670 November 14th, 2000
671 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
672 \f
673 Version 2.1.3
675 * bug fixes
677 \f
678 Version 2.1.2
680 * bug fixes
682 \f
683 Version 2.1.1
685 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
687 * New xdr functions are added; some rpc functions are now 64bit clean.
689 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
691 * Fixed known incompatibilities with glibc 2.0.
693 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
695 * Optimized a number of functions (especially the ELF dynamic loader).
697 * Update timezone data files.
699 * lots of charmaps corrections
701 * some new locale definitions and charmaps
703 \f
704 Version 2.1
706 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
707 conform to POSIX member type requirements. Symbol versions have been
708 adjusted as needed within the library, and for direct use by applications,
709 but there is potential for problems if third-party libraries use
710 struct timeval as part of their interface. This does not present
711 a problem for X and other "essential" system libraries.
713 * An additional locale model to support C++ Standard Library locale
714 model and probably more was implemented by Ulrich Drepper.
716 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
717 symbol level.
719 * Miles Bader provided the `argp' function family to support hierachical
720 command line argument parsing, layered on top of getopt.
722 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
724 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
725 numbers.
727 * scanf recognizes the %a and %A format for scanning floating point numbers.
729 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
730 information and interfaces for the available integer types.
732 * about 130 new math functions were added to implement the ISO C9x math
733 library.
735 * the new header <complex.h> contains definitions of the complex math
736 functions from ISO C 9X.
738 * the new header <tgmath.h> defines generic macros to use complex or
739 real valued functions.
741 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
743 * Andreas Jaeger provided a test suite for the math library.
745 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
747 * Ulrich Drepper added character set conversion functions (iconv).
749 * Optimized string functions have been added.
751 * The localedata addon is now part of glibc.
753 * An implementation of profiling shared libraries was added by Ulrich Drepper.
755 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
756 daemon for NSS (nscd).
758 Missing a better place here are some numbers on improvements. Under
759 Linux 2.1.125 un-tar-ing the kernel sources takes
761 user system wall
763 using local files 12.19s 6.88s 22.91s
765 using NIS 13.92s 8.91s 26.34s
767 using NIS & nscd 10.37s 7.34s 25.30s
769 using NIS+ 27.57s 30.37s 640.46s
771 using NIS+ & nscd 10.25s 7.83s 26.51s
773 using NIS & old nscd [1] 13.83s 8.32s 29.60s
775 Keep in mind that non-namelookup related operations dominate above times.
776 It was just a common complain that using NIS+ unpacking the kernel is
777 horribly slow.
779 [1] The old nscd implementation is not available anymore since it was
780 distributed with glibc up to version 2.0.98 and thus is now replaced.
782 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
784 * Mark Kettenis provided a Hesiod NSS module.
786 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
787 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
789 * rcmd can now handle netgroups (Dick Streefland).
791 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
792 Bambrough.
794 * Support for the IPv6 protocol has been added to the socket API, as per the
795 latest draft standards.
797 * Support for Linux 2.2 has been added.
799 * Interface changes relative to the latest 2.0.x release:
800 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
801 addseverity NEW: Unix98
802 alphasort64 NEW: LFS
803 argp_err_exit_status NEW: argp, GNU ext
804 argp_error NEW: argp, GNU ext
805 argp_failure NEW: argp, GNU ext
806 argp_help NEW: argp, GNU ext
807 argp_parse NEW: argp, GNU ext
808 argp_program_bug_address NEW: argp, GNU ext
809 argp_program_version NEW: argp, GNU ext
810 argp_program_version_hook NEW: argp, GNU ext
811 argp_state_help NEW: argp, GNU ext
812 argp_usage NEW: argp, GNU ext
813 authdes_create NEW: Secure RPC
814 authdes_getucred NEW: Secure RPC
815 authdes_pk_create NEW: Secure RPC
816 backtrace NEW: GNU ext.
817 backtrace_symbols NEW: GNU ext.
818 backtrace_symbols_fd NEW: GNU ext.
819 cacos NEW: ISO C 9x
820 cacosf NEW: ISO C 9x
821 cacosh NEW: ISO C 9x
822 cacoshf NEW: ISO C 9x
823 cacoshl NEW: ISO C 9x
824 cacosl NEW: ISO C 9x
825 capget NEW: kernel
826 capset NEW: kernel
827 carg NEW: ISO C 9x
828 cargf NEW: ISO C 9x
829 cargl NEW: ISO C 9x
830 casin NEW: ISO C 9x
831 casinf NEW: ISO C 9x
832 casinh NEW: ISO C 9x
833 casinhf NEW: ISO C 9x
834 casinhl NEW: ISO C 9x
835 casinl NEW: ISO C 9x
836 catan NEW: ISO C 9x
837 catanf NEW: ISO C 9x
838 catanh NEW: ISO C 9x
839 catanhf NEW: ISO C 9x
840 catanhl NEW: ISO C 9x
841 catanl NEW: ISO C 9x
842 cbc_crypt NEW: Secure RPC
843 ccos NEW: ISO C 9x
844 ccosf NEW: ISO C 9x
845 ccosh NEW: ISO C 9x
846 ccoshf NEW: ISO C 9x
847 ccoshl NEW: ISO C 9x
848 ccosl NEW: ISO C 9x
849 cexp NEW: ISO C 9x
850 cexpf NEW: ISO C 9x
851 cexpl NEW: ISO C 9x
852 cimag NEW: ISO C 9x
853 cimagf NEW: ISO C 9x
854 cimagl NEW: ISO C 9x
855 clearerr_locked REMOVED
856 clntunix_create NEW: sunrpc ext
857 clog NEW: ISO C 9x
858 clog10 NEW: ISO C 9x
859 clog10f NEW: ISO C 9x
860 clog10l NEW: ISO C 9x
861 clogf NEW: ISO C 9x
862 clogl NEW: ISO C 9x
863 conj NEW: ISO C 9x
864 conjf NEW: ISO C 9x
865 conjl NEW: ISO C 9x
866 cpow NEW: ISO C 9x
867 cpowf NEW: ISO C 9x
868 cpowl NEW: ISO C 9x
869 cproj NEW: ISO C 9x
870 cprojf NEW: ISO C 9x
871 cprojl NEW: ISO C 9x
872 creal NEW: ISO C 9x
873 crealf NEW: ISO C 9x
874 creall NEW: ISO C 9x
875 creat64 NEW: LFS
876 csin NEW: ISO C 9x
877 csinf NEW: ISO C 9x
878 csinh NEW: ISO C 9x
879 csinhf NEW: ISO C 9x
880 csinhl NEW: ISO C 9x
881 csinl NEW: ISO C 9x
882 csqrt NEW: ISO C 9x
883 csqrtf NEW: ISO C 9x
884 csqrtl NEW: ISO C 9x
885 ctan NEW: ISO C 9x
886 ctanf NEW: ISO C 9x
887 ctanh NEW: ISO C 9x
888 ctanhf NEW: ISO C 9x
889 ctanhl NEW: ISO C 9x
890 ctanl NEW: ISO C 9x
891 des_setparity NEW: Secure RPC
892 ecb_crypt NEW: Secure RPC
893 endutxent NEW: Unix98
894 exp10 NEW: ISO C 9x
895 exp10f NEW: ISO C 9x
896 exp10l NEW: ISO C 9x
897 exp2 NEW: ISO C 9x
898 exp2f NEW: ISO C 9x
899 exp2l NEW: ISO C 9x
900 fattach NEW: STREAMS
901 fdetach NEW: STREAMS
902 fdim NEW: ISO C 9x
903 fdimf NEW: ISO C 9x
904 fdiml NEW: ISO C 9x
905 feclearexcept NEW: ISO C 9x
906 fegetenv NEW: ISO C 9x
907 fegetexceptflag NEW: ISO C 9x
908 fegetround NEW: ISO C 9x
909 feholdexcept NEW: ISO C 9x
910 feof_locked REMOVED
911 feraiseexcept NEW: ISO C 9x
912 ferror_locked REMOVED
913 fesetenv NEW: ISO C 9x
914 fesetexceptflag NEW: ISO C 9x
915 fesetround NEW: ISO C 9x
916 fetestexcept NEW: ISO C 9x
917 feupdateenv NEW: ISO C 9x
918 fflush_locked REMOVED
919 ffsl NEW: GNU ext.
920 ffsll NEW: GNU ext.
921 fgetpos64 NEW: LFS
922 fgets_unlocked NEW: GNU ext.
923 fileno_locked REMOVED
924 fma NEW: ISO C 9x
925 fmaf NEW: ISO C 9x
926 fmal NEW: ISO C 9x
927 fmax NEW: ISO C 9x
928 fmaxf NEW: ISO C 9x
929 fmaxl NEW: ISO C 9x
930 fmin NEW: ISO C 9x
931 fminf NEW: ISO C 9x
932 fminl NEW: ISO C 9x
933 fmtmsg NEW: Unix98
934 fopen64 NEW: LFS
935 fputc_locked REMOVED
936 fputs_unlocked NEW: GNU ext.
937 fread_unlocked NEW: GNU ext.
938 freopen64 NEW: LFS
939 fseeko NEW: Unix98
940 fsetpos64 NEW: LFS
941 fstatfs64 NEW: LFS
942 fstatvfs NEW: Unix98
943 fstatvfs64 NEW: LFS
944 ftello NEW: Unix98
945 ftello64 NEW: LFS
946 ftruncate64 NEW: LFS
947 ftw64 NEW: LFS
948 fwrite_unlocked NEW: GNU ext.
949 gai_strerror NEW: IPv6
950 gamma_r REMOVED
951 gammaf_r REMOVED
952 gammal_r REMOVED
953 getchar_locked REMOVED
954 getdate NEW: Unix98
955 getdate_err NEW: Unix98
956 getdate_r NEW: GNU ext.
957 getmsg NEW: STREAMS
958 getnameinfo NEW: IPv6
959 getnetname NEW: Secure RPC
960 getpmsg NEW: STREAMS
961 getpt NEW: Unix98 PTY
962 getrlimit64 NEW: LFS
963 getutxent NEW: Unix98
964 getutxid NEW: Unix98
965 getutxline NEW: Unix98
966 glob64 NEW: GNU ext.
967 globfree64 NEW: GNU ext.
968 gnu_get_libc_release NEW: GNU ext.
969 gnu_get_libc_version NEW: GNU ext.
970 grantpt NEW: Unix98 PTY
971 host2netname NEW: Secure RPC
972 iconv NEW: iconv
973 iconv_close NEW: iconv
974 iconv_open NEW: iconv
975 if_freenameindex NEW: IPv6
976 if_indextoname NEW: IPv6
977 if_nameindex NEW: IPv6
978 if_nametoindex NEW: IPv6
979 in6addr_any NEW: IPv6
980 in6addr_loopback NEW: IPv6
981 inet6_isipv4mapped NEW: IPv6
982 isastream NEW: STREAMS
983 iswblank NEW: GNU ext.
984 key_decryptsession NEW: Secure RPC
985 key_decryptsession_pk NEW: Secure RPC
986 key_encryptsession NEW: Secure RPC
987 key_encryptsession_pk NEW: Secure RPC
988 key_gendes NEW: Secure RPC
989 key_get_conv NEW: Secure RPC
990 key_secretkey_is_set NEW: Secure RPC
991 key_setnet NEW: Secure RPC
992 key_setsecret NEW: Secure RPC
993 llrint NEW: ISO C 9x
994 llrintf NEW: ISO C 9x
995 llrintl NEW: ISO C 9x
996 llround NEW: ISO C 9x
997 llroundf NEW: ISO C 9x
998 llroundl NEW: ISO C 9x
999 log2 NEW: ISO C 9x
1000 log2f NEW: ISO C 9x
1001 log2l NEW: ISO C 9x
1002 lrint NEW: ISO C 9x
1003 lrintf NEW: ISO C 9x
1004 lrintl NEW: ISO C 9x
1005 lround NEW: ISO C 9x
1006 lroundf NEW: ISO C 9x
1007 lroundl NEW: ISO C 9x
1008 lseek64 NEW: LFS
1009 makecontext NEW: Unix98
1010 mempcpy NEW: GNU ext.
1011 mmap64 NEW: LFS
1012 moncontrol REMOVED
1013 modify_ldt NEW: kernel
1014 nan NEW: ISO C 9x
1015 nanf NEW: ISO C 9x
1016 nanl NEW: ISO C 9x
1017 nearbyint NEW: ISO C 9x
1018 nearbyintf NEW: ISO C 9x
1019 nearbyintl NEW: ISO C 9x
1020 netname2host NEW: Secure RPC
1021 netname2user NEW: Secure RPC
1022 nexttoward NEW: ISO C 9x
1023 nexttowardf NEW: ISO C 9x
1024 nexttowardl NEW: ISO C 9x
1025 nftw NEW: Unix98
1026 nftw64 NEW: LFS
1027 open64 NEW: LFS
1028 passwd2des NEW: Secure RPC
1029 pow10 NEW: GNU ext.
1030 pow10f NEW: GNU ext.
1031 pow10l NEW: GNU ext.
1032 pread NEW: Unix98
1033 pread64 NEW: LFS
1034 printf_size NEW: GNU ext.
1035 printf_size_info NEW: GNU ext.
1036 profil_counter REMOVED
1037 pthread_mutexattr_getkind_np REPLACED
1038 pthread_mutexattr_setkind_np REPLACED
1039 ptsname NEW: Unix98 PTY
1040 ptsname_r NEW: Unix98 PTY
1041 putc_locked REMOVED
1042 putchar_locked REMOVED
1043 putgrent NEW: GNU ext.
1044 putmsg NEW: STREAMS
1045 putpmsg NEW: STREAMS
1046 pututxline NEW: Unix98
1047 pwrite NEW: Unix98
1048 pwrite64 NEW: LFS
1049 readdir64 NEW: LFS
1050 readdir64_r NEW: LFS
1051 remquo NEW: ISO C 9x
1052 remquof NEW: ISO C 9x
1053 remquol NEW: ISO C 9x
1054 round NEW: ISO C 9x
1055 roundf NEW: ISO C 9x
1056 roundl NEW: ISO C 9x
1057 rtime NEW: GNU ext.
1058 scalbln NEW: ISO C 9x
1059 scalblnf NEW: ISO C 9x
1060 scalblnl NEW: ISO C 9x
1061 scandir64 NEW: LFS
1062 sendfile NEW: kernel
1063 setcontext NEW: Unix98
1064 setrlimit64 NEW: LFS
1065 setutxent NEW: Unix98
1066 sighold NEW: Unix98
1067 sigignore NEW: Unix98
1068 sigqueue NEW: POSIX.1b
1069 sigrelse NEW: Unix98
1070 sigset NEW: POSIX.1b
1071 sigtimedwait NEW: POSIX.1b
1072 sigwaitinfo NEW: POSIX.1b
1073 sincos NEW: GNU ext.
1074 sincosf NEW: GNU ext.
1075 sincosl NEW: GNU ext.
1076 statfs64 NEW: LFS
1077 statvfs NEW: Unix98
1078 statvfs64 NEW: LFS
1079 strcasestr NEW: GNU ext.
1080 strtoimax NEW: ISO C 9x
1081 strtoumax NEW: ISO C 9x
1082 strverscmp NEW: GNU ext.
1083 svcauthdes_stats NEW: Secure RPC
1084 svcunix_create NEW: sunrpc etx
1085 svcunixfd_create NEW: sunrpc ext
1086 swapcontext NEW: Unix98
1087 tcgetsid NEW: Unix98 PTY
1088 tdestroy NEW: GNU ext.
1089 tgamma NEW: ISO C 9x
1090 tgammaf NEW: ISO C 9x
1091 tgammal NEW: ISO C 9x
1092 tmpfile64 NEW: LFS
1093 trunc NEW: ISO C 9x
1094 truncate64 NEW: LFS
1095 truncf NEW: ISO C 9x
1096 truncl NEW: ISO C 9x
1097 umount2 NEW: kernel
1098 unlockpt NEW: Unix98 PTY
1099 updwtmpx NEW: Unix98
1100 user2netname NEW: Secure RPC
1101 utmpxname NEW: Unix98
1102 versionsort NEW: GNU ext.
1103 versionsort64 NEW: GNU ext.
1104 waitid NEW: Unix98
1105 wcscasecmp NEW: GNU ext.
1106 wcsncasecmp NEW: GNU ext.
1107 wcsnlen NEW: GNU ext.
1108 wcstoimax NEW: ISO C 9x
1109 wcstoll NEW: ISO C 9x
1110 wcstoull NEW: ISO C 9x
1111 wcstoumax NEW: ISO C 9x
1112 wcswcs NEW: Unix98
1113 wordexp NEW: POSIX.2
1114 wordfree NEW: POSIX.2
1115 write_profiling REMOVED
1116 xdecrypt NEW: Secure RPC
1117 xdr_authdes_cred NEW: Secure RPC
1118 xdr_authdes_verf NEW: Secure RPC
1119 xdr_cryptkeyarg NEW: Secure RPC
1120 xdr_cryptkeyarg2 NEW: Secure RPC
1121 xdr_cryptkeyres NEW: Secure RPC
1122 xdr_getcredres NEW: Secure RPC
1123 xdr_key_netstarg NEW: Secure RPC
1124 xdr_key_netstres NEW: Secure RPC
1125 xdr_keybuf NEW: Secure RPC
1126 xdr_keystatus NEW: Secure RPC
1127 xdr_netnamestr NEW: Secure RPC
1128 xdr_sizeof NEW: Secure RPC
1129 xdr_unixcred NEW: sunrpc ext
1130 xencrypt NEW: Secure RPC
1131 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1132 \f
1133 Version 2.0.6
1135 * more bug fixes
1137 \f
1138 Version 2.0.5
1140 * more bug fixes
1142 * inet_ntoa is thread-safe
1144 * updwtmp is moved from libutil to libc
1146 * rewrite of cbrt function
1148 * update of timezone data
1149 \f
1150 Version 2.0.4
1152 * more bug fixes
1153 \f
1154 Version 2.0.3
1156 * more bug fixes
1157 \f
1158 Version 2.0.2
1160 * more bug fixes
1162 * add atoll function
1164 * fix complex problems in Berkeley DB code
1166 * fix math functions
1167 \f
1168 Version 2.0.1
1170 * fixed lots of header problems (especially Linux/GNU specific)
1172 * dynamic loader preserves all registers
1174 * Roland McGrath provided support for handling of auxiliary objects in
1175 the ELF dynamic loader.
1177 * support for parallel builds is improved
1178 \f
1179 Version 2.0
1181 * GNU extensions are no longer declared by default. To enable them you
1182 must define the macro `_GNU_SOURCE' in your program or compile with
1183 `-D_GNU_SOURCE'.
1185 * The library has changed from using GNU ld symbol aliases to using weak
1186 symbols where available. The ELF object file format supports weak
1187 symbols; GNU ld also supports weak symbols in the a.out format. (There
1188 is also now support for other GNU ld extensions in ELF. Use the
1189 `--with-elf' option to configure to indicate you have ELF, and
1190 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1191 of many files which contained only symbol aliases, reducing the size of
1192 the source and the compiled library; many other files were renamed to
1193 less cryptic names previously occupied by the symbol alias files.
1194 There is a new header file <elf.h> for programs which operate on
1195 files in the ELF format.
1197 * Converted to Autoconf version 2, so `configure' has more options.
1198 Run `configure --help' to see the details.
1200 * The library can now be configured to build profiling, highly-optimized
1201 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1202 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1203 `configure' enable building these extra libraries. The shared library is
1204 built by default when using both ELF and GNU ld. When shared libraries
1205 are enabled, the new library `-ldl' is available for arbitrary run-time
1206 loading of shared objects; its interface is defined in <dlfcn.h>. The
1207 new header file <link.h> gives access to the internals of the run-time
1208 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1209 application of same name on other systems and it provides information
1210 about dynamically linked binaries.
1212 * The C library now provides the run-time support code for profiling
1213 executables compiled with `-pg'. Programs can control the profiling code
1214 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1215 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1216 the support for this file format was contributed by David Mosberger-Tang.
1218 * The math code has been replaced with a math library based on fdlibm from
1219 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1220 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1221 functions. The math functions now reside in a separate library, so
1222 programs using them will need to use `-lm' their linking commands.
1224 * John C. Bowman contributed optimized ix87 assembler inline functions.
1226 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1227 mechanism similar to that found in Solaris 2. This is now used for the
1228 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1229 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1230 file controls what services are used for each individual database. This
1231 works by loading shared libraries with names specified in `nsswitch.conf',
1232 so service modules can be changed or added at any time without even
1233 relinking any program. Currently there are the file, db, and NIS based
1234 NSS services available.
1236 * The new functions `strtoq' and `strtouq' parse integer values from
1237 strings, like `strtol' and `strtoul', but they return `long long int' and
1238 `unsigned long long int' values, respectively (64-bit quantities).
1240 * The new functions `strtof' and `strtold' parse floating-point values from
1241 strings, like `strtod', but they return `float' and `long double' values,
1242 respectively (on some machines `double' and `long double' are the same).
1244 * Ulrich Drepper has contributed new implementations of the floating-point
1245 printing and reading code used in the `printf' family of functions and
1246 `strtod', `strtof', and `strtold'. These new functions are perfectly
1247 accurate, and much faster than the old ones.
1249 * The implementation of the POSIX locale model was completely rewritten by
1250 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1251 to compile the POSIX locale definition.
1253 * The former dummy implementations of the strcoll and strxfrm function are
1254 now replaced by fully functional code contributed by Ulrich Drepper. The
1255 collation information comes from the POSIX locale definitions.
1257 * The new header <langinfo.h> defines an interface for accessing
1258 various locale-dependent data (using the locale chosen with `setlocale').
1260 * Ulrich Drepper has contributed a new suite of functions for operation on
1261 wide-character and multibyte-character strings, in <wchar.h>;
1262 and classification and case conversion of wide characters, in <wctype.h>.
1263 These new functions are conforming to the ISO C, Amendement 1 specification.
1265 * There is now a second implementation of the standard I/O library available.
1266 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1267 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1269 * You can now use positional parameter specifications in format strings
1270 for the `printf' and `scanf' families of functions. For example,
1271 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1272 ``Number 6, Mr Jones''. This is mainly useful when providing different
1273 format strings for different languages, whose grammars may dictate
1274 different orderings of the values being printed. To support this
1275 feature, the interface for `register_printf_handler' has changed; see
1276 the header file <printf.h> for details.
1278 * The `printf' and `scanf' families of functions now understand a new
1279 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1280 to group numbers as indicated by the locale; for `scanf' and friends, this
1281 says to accept as valid only a number with all the proper grouping
1282 separators in the right places. In the default "C" locale, numbers are
1283 not grouped; but locales for specific countries will define the usual
1284 conventions (i.e. separate thousands with `,' in the US locale).
1286 * The pgrp functions have been regularized, slightly incompatibly but much
1287 less confusingly. The core functions are now `getpgid' and `setpgid',
1288 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1289 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1290 provided for compatibility. There is no longer an incompatible `getpgrp'
1291 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1293 * The new header file <fts.h> and suite of functions simplify programs that
1294 operate on directory trees. This code comes from 4.4 BSD.
1296 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1297 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1298 NSS scheme used in glibc.
1300 * There is a new malloc debugging hook `__memalign_hook'.
1302 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1303 `unsigned int' in <sys/types.h>. These are for compatibility only and
1304 their use is discouraged.
1306 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1307 done differently, so that it works even without GNU ld.
1309 * New function `euidaccess' checks allowed access to a file like `access',
1310 but using the effective IDs instead of the real IDs.
1312 * The time zone data files have been updated for the latest and greatest
1313 local time conventions of the countries of the world.
1315 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1316 see <dirent.h>.
1318 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1319 for formatting floating-point numbers. They are provided only for
1320 compatibility; new programs should use `sprintf' instead. There are
1321 also equivalent function for the `long double' floating-point type and
1322 all functions also exist in a reentrant form.
1324 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1325 functions for maintaining the login-record files (primarily of use to
1326 system programs such as `login'), and convenient functions for
1327 allocating and initializing a pseudo-terminal (pty) device.
1329 * Ulrich Drepper has contributed new support for System V style
1330 shared memory and IPC on systems that support it.
1332 * Ulrich Drepper has contributed several miscellaneous new functions found
1333 in System V: The `hsearch' family of functions provide an effective
1334 implementation of hash tables; `a64l' and `l64a' provide a very simple
1335 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1336 number generator.
1338 * Ulrich Drepper has contributed new reentrant counterparts for the
1339 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1341 * Ulrich Drepper has contributed new, highly-optimized versions of several
1342 string functions for the i486/Pentium family of processors.
1344 * Ulrich Drepper has updated the Linux-specific code, based largely
1345 on work done in Hongjiu Lu's version of GNU libc for Linux.
1346 The GNU library now supports Linux versions 2.0.10 and later,
1347 using the ELF object file format (i[3456]86-*-linux).
1349 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1351 * David Mosberger-Tang and Richard Henderson have ported the C library
1352 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1353 dynamic linking support for ELF/Alpha.
1355 * Richard Henderson contributed several Alpha optimized assembler function
1356 for arithmetic and string handling.
1358 * Ulrich Drepper has contributed a new set of message catalog functions to
1359 support multiple languages using the <libintl.h> interface, for use with
1360 his new package GNU gettext. Translation volunteers have contributed
1361 catalogs of the library's messages in Spanish, German, and Korean.
1363 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1364 program and the `catgets' function for reading the catalog files it
1365 creates. (The <libintl.h> interface is preferred; we include the
1366 <nl_types.h> interface using `catgets' only for source compatibility with
1367 programs already written to use it.)
1369 * New header file <values.h> gives SVID-compatible names for <limits.h>
1370 constants.
1372 * Various new macros, declarations, and small header files for compatibility
1373 with 4.4 BSD.
1375 * New function `group_member' is a convenient way to check if a process has
1376 a given effective group ID.
1378 * When using GCC 2.7 and later, the socket functions are now declared in a
1379 special way so that passing an argument of type `struct sockaddr_in *',
1380 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1381 `struct sockaddr *' type, does not generate a type-clash warning.
1383 * New function `error' declared in header file <error.h> is a convenient
1384 function for printing error messages and optionally exiting; this is the
1385 canonical function used in GNU programs. The new functions `err', `warn',
1386 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1387 doing the same thing.
1389 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1390 POSIX.2 `glob' function to do ~ and {...} expansion.
1392 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1393 `clearenv' which is used in POSIX.9 is also available.
1395 * New function `getsid' returns session ID number on systems that support it.
1397 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1398 files <db.h> and <mpool.h> provide a rich set of functions for several
1399 types of simple databases stored in memory and in files, and <ndbm.h> is
1400 an old `ndbm'-compatible interface using the `db' functions. Link with
1401 `-ldb' to get these functions.
1403 * New macro `strdupa' copies a string like `strdup', but uses local stack
1404 space from `alloca' instead of dynamic heap space from `malloc'.
1406 * New function `strnlen' is like `strlen' but searches only a given maximum
1407 number of characters for the null terminator. `stpncpy', `strndup' and
1408 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1409 function.
1411 * New function `statfs' in header <sys/statfs.h>.
1413 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1414 provide convenient functions for operating on blocks of null-terminated
1415 strings.
1417 * A new suite of functions in <utmp.h> handle all the details of reading
1418 and writing the utmp file.
1420 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1421 Thorsten Kukuk.
1423 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1424 completely POSIX compliant and also implemented the extended functionality
1425 to handle alternate digit representation and alternate era date formats.
1427 * Ulrich Drepper provided an implementation of the `strptime' function
1428 defined in XPG4.2 which transforms a string into a `struct tm' value.
1430 * Paul Eggert provided the tzselect shell script as part of the timezone
1431 code. The shell script makes it easy to select the correct timezone
1432 specification.
1434 * The implementation of the malloc family of functions is completely replaced
1435 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1436 The implementation uses the mmap function (if available) and it is
1437 optimized for the use in multi threaded programs.
1439 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1440 functions. This new functionality is usable by specifying a special
1441 salt string and it is compatible with implementation on *BSD systems.
1443 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1444 `getsubopt' to handle second level command line options, `bsd_signal'
1445 to access BSD style `signal' functionality, the obsolete `regexp' style
1446 expression matcher.
1448 * the `lchown' function is available on system which support this
1449 functionality.
1451 * The implementation of the shadow password handling function was contributed
1452 by Ulrich Drepper.
1454 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1456 * POSIX.1g support was added. The <sys/select.h> header is available,
1457 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1458 implementation of `getaddrinfo'.
1459 \f
1460 Version 1.09
1462 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1464 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1465 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1467 * The new function `daemon' from 4.4 BSD is useful for server programs that
1468 want to put themselves in the background.
1470 * Joel Sherrill has contributed support for several standalone boards that
1471 run without an operating system.
1473 * `printf', `scanf' and friends now accept a `q' type modifier for long
1474 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1476 * All of the code taken from BSD (notably most of the math and networking
1477 routines) has been updated from the BSD 4.4-Lite release.
1479 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1481 * The new functions `getdomainname' and `setdomainname' fetch or change the
1482 YP/NIS domain name. These are system calls which exist on systems which
1483 have YP (aka NIS).
1485 * The time zone data files have been updated for the latest international
1486 conventions.
1488 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1489 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1490 \f
1491 Version 1.08
1493 * The C library now includes support for Sun RPC, from Sun's free
1494 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1495 are included. (There is still no support for YP.)
1497 * Tom Quinn has contributed a port of the C library to SGI machines running
1498 Irix 4 (mips-sgi-irix4).
1500 * The new `lockf' function is a simplified interface to the locking
1501 facilities of `fcntl', included for compatibility.
1503 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1505 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1507 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1508 compatibility.
1510 * The error message printed by `assert' for a failed assertion now includes
1511 the name of the program (if using GNU ld) and the name of the calling
1512 function (with versions of GCC that support this).
1514 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1516 * The library now includes the <sys/mman.h> header file and memory
1517 management functions `mmap', `munmap', `mprotect', `msync', and
1518 `madvise', on systems that support those facilities.
1520 * The interface for `mcheck' has changed slightly: the function called to
1521 abort the program when an allocation inconsistency is detected now takes
1522 an argument that indicates the type of failure. The new function
1523 `mprobe' lets you request a consistency check for a particular block at
1524 any time (checks are normally done only when you call `free' or `realloc'
1525 on a block).
1527 * It is now possible to easily cross-compile the C library, building on one
1528 system a library to run on another machine and/or operating system. All
1529 you need to do is set the variable `HOST_CC' in `configparms' to the
1530 native compiler for programs to run on the machine you are building on (a
1531 few generator programs are used on Unix systems); set `CC' to the
1532 cross-compiler.
1534 * The new function `fexecve' (only implemented on the GNU system) executes
1535 a program file given a file descriptor already open on the file.
1536 \f
1537 Version 1.07
1539 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1540 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1542 * You can set the variable `libprefix' in `configparms' to specify a prefix
1543 to be prepended to installed library files; this makes it easy to install
1544 the GNU C library to be linked as `-lgnuc' or whatever.
1546 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1547 copies a limited number of characters from a string, and returns the
1548 address of the last character written.
1550 * You no longer need to check for whether the installed `stddef.h' is
1551 compatible with the GNU C library. configure now checks for you.
1553 * You can now define a per-stream `fileno' function to convert the
1554 stream's cookie into an integral file descriptor.
1556 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1557 allocates zero bytes of storage, and returns a unique pointer which
1558 you can pass to `realloc' or `free'. The behavior is undefined if
1559 you dereference this pointer.
1561 * The C library now runs on Sony NEWS m68k machines running either
1562 NewsOS 3 or NewsOS 4.
1564 * The new `syscall' function is a system-dependent primitive function
1565 for invoking system calls. It has the canonical behavior on Unix
1566 systems, including unreliable return values for some calls (such as
1567 `pipe', `fork' and `getppid').
1569 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1570 to `EAGAIN', which is the preferred name. On systems whose kernels
1571 use two distinct codes, the C library now translates EWOULDBLOCK to
1572 EAGAIN in every system call function.
1573 \f
1574 Version 1.06
1576 * The GNU C Library Reference Manual is now distributed with the library.
1577 `make dvi' will produce a DVI file of the printed manual.
1578 `make info' will produce Info files that you can read on line using C-h i
1579 in Emacs or the `info' program.
1580 Please send comments on the manual to bug-glibc-manual@gnu.org.
1582 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1584 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1586 * Jason Merrill has contributed a port to the Sequent Symmetry running
1587 Dynix version 3 (i386-sequent-dynix).
1589 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1590 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1592 * New function `memory_warnings' lets you arrange to get warnings when
1593 malloc is running out of memory to allocate, like Emacs gives you.
1595 * The C library now contains the relocating allocator used in Emacs 19 for
1596 its editing buffers. This allocator (ralloc) minimizes allocation
1597 overhead and fragmentation by moving allocated regions around whenever it
1598 needs to. You always refer to a ralloc'd region with a "handle" (a
1599 pointer to a pointer--an object of type `void **').
1601 * There is a new `printf' format: `%m' gives you the string corresponding
1602 to the error code in `errno'.
1604 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1605 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1606 pass, the `a' modifier says to fill in a `char **' you pass with a
1607 malloc'd string.
1609 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1610 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1611 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1613 * `mkstemp' is a traditional Unix function to atomically create and open a
1614 uniquely-named temporary file.
1615 \f
1616 Version 1.05
1618 * The standard location for the file that says what the local timezone is
1619 has changed again. It is now `/usr/local/etc/localtime' (or more
1620 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1622 * The distribution no longer contains any files with names longer than 14
1623 characters.
1625 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1626 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1628 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1629 \f
1630 Version 1.04
1632 * The configuration process has changed quite a bit. The `configure'
1633 script is now used just like the configuration scripts for other GNU
1634 packages. The `sysdeps' directory hierarchy is much rearranged.
1635 The file `INSTALL' explains the new scheme in detail.
1637 * The header files no longer need to be processed into ANSI C and
1638 traditional C versions. There is just one set of files to install, and
1639 it will work with ANSI or old C compilers (including `gcc -traditional').
1641 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1642 MIPS DECStation running Ultrix 4.
1644 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1645 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1646 made itself into a shared library.
1648 * Yet further improved support for the i386, running 4.3 BSD-like systems
1649 (such as Mach 3 with the Unix single-server), or System V.
1651 * New function `strncasecmp' to do case-insensitive string comparison
1652 with limited length.
1654 * New function `strsep' is a reentrant alternative to `strtok'.
1656 * New functions `scandir' and `alphasort' for searching directories.
1658 * New function `setenv' is a better interface to `putenv'.
1660 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1661 function for traversing a directory tree.
1663 * The GNU obstack package is now also part of the C library.
1664 The new function `open_obstack_stream' creates a stdio stream that
1665 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1666 formatted output directly to an obstack.
1668 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1669 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1671 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1673 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1674 things to your strings.
1676 * There are some new test programs: test-fseek, testmb, and testrand.
1678 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1679 These ports are not finished, but are a good starting place for really
1680 supporting those systems.
1682 * `/etc/localtime' is now the standard location for the file that says what
1683 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1684 This follows the general principle that `/etc' is the place for all local
1685 configuration files.
1687 * The C library header files now use `extern "C"' when used by the C++
1688 compiler, so the C library should now work with C++ code.
1690 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1691 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1692 in <strings.h>.)
1694 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1695 function which uses the `merge sort' algorithm, and is said to be
1696 significantly faster than the old GNU `qsort' function. Merge sort is
1697 now the standard `qsort' function. The new algorithm can require a lot
1698 of temporary storage; so, the old sorting function is called when the
1699 required storage is not available.
1701 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1702 provides the Unix `crypt' function, plus some other entry points.
1704 * The code and header files taken from 4.4 BSD have been updated with the
1705 latest files released from Berkeley.
1706 \f
1707 ----------------------------------------------------------------------
1708 Copyright information:
1710 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1711 Free Software Foundation, Inc.
1713 Permission is granted to anyone to make or distribute verbatim copies
1714 of this document as received, in any medium, provided that the
1715 copyright notice and this permission notice are preserved,
1716 thus giving the recipient permission to redistribute in turn.
1718 Permission is granted to distribute modified versions
1719 of this document, or of portions of it,
1720 under the above conditions, provided also that they
1721 carry prominent notices stating who last changed them.
1722 \f
1723 Local variables:
1724 version-control: never
1725 End: