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1 GNU C Library NEWS -- history of user-visible changes. 2008-8-2
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, paccept, 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 Implemented by Pravin Satpute.
41 \f
42 Version 2.8
44 * New locales: bo_CN, bo_IN, shs_CA.
46 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
48 * Sorting rules for some Indian languages (Devanagari and Gujarati).
49 Implemented by Pravin Satpute.
51 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
53 * nscd caches now all timeouts for DNS entries
54 Implemented by Ulrich Drepper.
56 * nscd is more efficient and wakes up less often.
57 Implemented by Ulrich Drepper.
59 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
60 vdprintf, and obstack_vprintf.
61 Implemented by Jakub Jelinek.
63 * Faster memset for x86-64.
64 Implemented by Harsha Jagasia and H.J. Lu.
66 * Faster memcpy on x86.
67 Implemented by Ulrich Drepper.
69 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
70 Implemented by Ulrich Drepper.
72 * Faster sqrt and sqrtf implemention for some PPC variants.
73 Implemented by Stephen Munroe.
74 \f
75 Version 2.7
77 * More checking functions: fread, fread_unlocked, open*, mq_open.
78 Implemented by Jakub Jelinek and Ulrich Drepper.
80 * Extend fortification to C++. Implemented by Jakub Jelinek.
82 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
83 by not recognizing 'a' as a modifier when those specs are requested.
84 Implemented by Jakub Jelinek.
86 * PPC optimizations to math and string functions.
87 Implemented by Steven Munroe.
89 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
90 options to be passed. Implemented by Ulrich Drepper.
92 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
94 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
95 Implemented by Ulrich Drepper.
97 * Handle private futexes in the NPTL implementation.
98 Implemented by Jakub Jelinek and Ulrich Drepper.
100 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
101 Implemented by Roland McGrath and Ulrich Drepper.
103 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
105 * SHA-256 and SHA-512 based password encryption.
106 Implemented by Ulrich Drepper.
108 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
109 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
110 yo_NG.
112 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
113 Implemented by Ulrich Drepper.
114 \f
115 Version 2.6
117 * New Linux interfaces: epoll_pwait, sched_getcpu.
119 * New generic interfaces: strerror_l.
121 * nscd can now cache the services database. Implemented by Ulrich Drepper.
123 \f
124 Version 2.5
126 * For Linux, the sorting of addresses returned by getaddrinfo now also
127 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
128 Implemented by Ulrich Drepper.
130 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
131 Implemented by Ulrich Drepper.
133 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
135 * New iconv module for MIK. Contributed by Alexander Shopov.
137 * For sites with broken group and/or passwd database, the auto-propagate
138 option of nscd can prevent creating ID lookup entries from the results
139 of a name lookup and vice versa. This usually is no problem but some
140 site might have problems with the default behavior.
141 Implemented by Ulrich Drepper.
143 * Iterating over entire database in NIS can be slow. With the
144 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
145 to trade time for memory. The entire database will be read at once.
146 Implemented by Ulrich Drepper.
148 * The interfaces introduced in RFC 3542 have been implemented by
149 Ulrich Drepper.
151 * Support for the new ELF hash table format was added by Ulrich Drepper.
153 * Support for priority inheritance mutexes added by Jakub Jelinek and
154 Ulrich Drepper.
156 * Support for priority protected mutexes added by Jakub Jelinek.
158 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
159 or_IN, csb_PL, fy_NL, sr_ME.
160 \f
161 Version 2.4
163 * More overflow detection functions.
165 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
166 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
168 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
169 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
170 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
171 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
172 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
173 by Masahide Washizawa.
175 * It is now possible to install audit libraries for the dynamic linker using
176 LD_AUDIT. Implemented by Ulrich Drepper.
178 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
179 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
180 For a libc and libpthread that works well on Linux 2.4 kernels, we
181 recommend using the stable 2.3 branch.
183 * The new function open_wmemstream acts like open_memstream,
184 but uses a wchar_t wide character buffer.
186 * The new function ppoll is an improved version of poll, similar to pselect.
188 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
189 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
190 renameat, unlinkat, linkat, symlinkat, readlinkat.
192 * New Linux kernel system calls: unshare,
193 inotify_init, inotify_add_watch, inotify_rm_watch.
195 * The euidaccess function is now also known by the alias eaccess,
196 for compatibility with some other systems.
198 * Timezone data updated to 2006b version.
199 \f
200 Version 2.3.6
202 * The following bugs are resolved with this release:
204 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
205 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
206 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
207 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
208 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
209 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
211 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
213 * As of this release, GCC 4 can be used to compile the C Library.
215 * Timezone data updated to 2005m version.
216 \f
217 Version 2.3.5
219 * The following bugs are resolved with this release:
221 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
222 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
223 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
224 777, 787, 821, 822, 823, 825
226 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
227 \f
228 Version 2.3.4
230 * Support for RFC 3678. Real implementations exist only for Linux so far.
231 Implemented by Ulrich Drepper.
233 * nscd can now cache entries persistently. Expiring entries are reloaded.
234 For speedups the cache can be shared in memory with client processes.
235 Implemented by Ulrich Drepper.
237 * nscd can now perform SELinux checks.
238 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
240 * getaddrinfo queries are now cached. Canonical name lookup is performed
241 efficiently.
242 Implemented by Ulrich Drepper.
244 * The nothrow function attribute is used when headers are used by gcc when
245 compiling C code. This can avoid significant amounts of exception
246 handling data.
248 * The malloc functions perform more error checking and are stricter when
249 it comes to reacting on errors. The default action is to terminate
250 the process after showing an error message. Implemented by Ulrich Drepper.
252 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
253 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
255 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
256 namespaces using the new function dlmopen(). This feature is of course,
257 like most other dynamic loading functionality, not available in statically
258 linked applications. Implemented by Ulrich Drepper.
260 * Low-overhead boundary checking variants of string and some stdio functions
261 were added. These are to be used in conjunction with a gcc patch by
262 Jakub Jelinek which adds calls to these functions if possible.
263 Implemented by Jakub Jelinek and Ulrich Drepper.
265 * Old code for several operating systems and machine architectures that
266 have not been in working condition in a long time have been removed from
267 the main source tree maintained by the GNU C Library's maintainers.
268 These files are now reside in the separate `ports' source module
269 that is usable as an add-on when building the library.
270 \f
271 Version 2.3.3
273 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
274 interrogate the dynamic linker, compatible with the Solaris interface.
276 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
277 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
279 * getifaddrs now uses the netlink interface on Linux to get its information.
280 Implemented by Thorsten Kukuk.
282 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
283 Implemented by Ulrich Drepper.
285 * support for non-executable stacks on x86 has been added. Changes mostly
286 by Roland McGrath.
288 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
289 and Ulrich Drepper.
291 * getaddrinfo now performs destination address selection according to
292 RFC 3484.
293 \f
294 Version 2.3.2
296 * Thread-safe interfaces for many functions that access locale data
297 were added in version 2.3, but these features were omitted from NEWS.
298 Many functions have variants with an `_l' suffix that take a `locale_t'
299 object as a parameter rather than consulting the current locale.
300 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
301 create and maintain `locale_t' objects. Additionally, the new function
302 `uselocale' sets "the current locale" (as used by functions not so
303 parameterized) set for an individual thread. These features were added
304 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
306 * The functions getresuid, getresgid, setresuid, and setresgid, which
307 have long been available on Linux, are now declared in <unistd.h>
308 and are now also available on the Hurd.
310 * ELF thread-local storage support (TLS) now works on x86-64.
312 * The new dynamic string token $LIB is expanded in shared library names.
313 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
315 * Aldy Hernandez contributed complete software floating point support for
316 PowerPC machines with no FPU.
318 * fexecve is implemented on Linux.
320 * The `btowc' function should work at least twice as fast due to
321 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
323 * With approriate thread add-ons cancelable functions are now implemented
324 in libc.so as well. No need to call the function in libpthread. This
325 change allowed to finally disable the incorrect and expensive handling
326 of weak definition in ld.so.
328 * Yet more PLT entries in libc.so have been removed. We finally arrived
329 at the bare minimum. Startup times improved appropriately.
331 * Support for the new Linux/x86 system call interface was added. The
332 AT_SYSINFO auxiliary vector entry is recognized and handled.
333 \f
334 Version 2.3
336 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
337 charsets.
339 * iconv (the program and the interface) now accepts empty names (excluding
340 options like //TRANSLIT) to mean "use charset of current locale".
342 * localedef can now transliterate characters in strings which are not in
343 the provided charmap. The information from the input locale is used.
345 * Prelinking support was added for ELF targets. This requires additional
346 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
348 * Read-only stdio streams now use mmap to speed up operation by eliminating
349 copying and buffer underflows. To use add 'm' to the mode string of
350 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
352 * The malloc functions were completely rewritten by Wolfram Gloger based
353 on Doug Lea's malloc-2.7.0.c.
355 * Isamu Hasegawa contributed a completely new and POSIX-conformant
356 implementation of regex.
358 * Bruno Haible upgraded the iconv and locale implementation to support
359 Unicode 3.2.
361 * Contents of the LC_* and LANG environment variables in the CEN style are
362 not recognized anymore. It never was used. Change by Ulrich Drepper.
364 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
365 thread-local storage (TLS) ABI on some platforms.
366 Changes by Ulrich Drepper. SH support by Kaz Kojima.
368 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
369 EUC-JISX0213, and TSCII.
371 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
372 BSD-compatible interface for getting all network interface addresses.
373 Implementation for IPv4 by Roland McGrath.
375 * Loading of locale data is faster due to the introduction of a locale
376 archive. Implemented by Roland McGrath and Ulrich Drepper.
378 * Startup times are significantly reduced by not using exported functions
379 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
380 and Ulrich Drepper.
382 * Steven Munroe contributed a port to PowerPC64/Linux.
383 \f
384 Version 2.2.6
386 * The Hurd now uses the GNU libio implementation of stdio rather than the
387 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
389 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
390 with the same behavior as the Linux system call of the same name.
391 \f
392 Version 2.2.5
394 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
395 128-bit long double format.
397 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
398 IBM1161, and IBM1162 charsets.
400 * Andreas Jaeger contributed a port to x86-64/Linux.
402 * Peter Bruin contributed a port to PowerPC/Hurd.
404 * libc functions using I/O streams now can handle wide-oriented streams
405 as well.
407 * optimizations in the dynamic linker. Binaries created by recent binutils
408 versions start up quicker due to reduced time spent on relocations.
410 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
411 \f
412 Version 2.2.4
414 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
415 asinh, atanh, j0 for the 128-bit long double format.
417 * Bruno Haible updated all the code handling Unicode in some form to
418 support Unicode 3.1.
420 * Speed of regex for single-byte locales is back to previous levels.
421 Patch by Isamu Hasegawa.
423 * Alpha, SPARC, and IA-64 now also using floating stacks.
425 * Startup time of internationalized applications greatly improved through
426 iconv cache. Use iconvconfig to generate the cache file.
427 Contributed by Ulrich Drepper.
429 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
430 severe performance problems. Patch by David Mosberger.
432 * The Hurd port got a lot more functionality like AIO, various stdio
433 extensions, etc. Mainly done by Roland McGrath.
435 * mtrace can now lookup symbols in shared libraries.
436 \f
437 Version 2.2.3
439 * Intel's IA-64 math library is largely integrated. It provides fast and
440 accurate implementatations for most basic and standard math functions
441 in float, double, and long double format.
443 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
444 and asin for the 96-bit long double format and asin, log, tan for the
445 128-bit long double format.
447 * The beginning of a last-bit accurate math library by IBM Haifa were added.
448 The basic double functions exist today. Contributed by Abraham Ziv
449 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
450 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
452 * An asynchronous name lookup library was added. The interface is designed
453 after POSIX AIO. The proposal was circulated beforehand to get comments.
454 No negative ones came in. Implemented by Ulrich Drepper.
456 * Port to S390/64bit contributed by Martin Schwidefsky
457 <schwidefsky@de.ibm.com>.
459 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
460 of functions for Linux/IA-64.
462 * The RPC code is now thread safe. Threads can now use the same service
463 of different services at the same time. Patch by Eric Norum
464 <eric.norum@usask.ca> with some help by Ulrich Drepper.
466 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
467 family of functions for Linux/S390.
469 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
470 of functions for Linux/x86.
472 * Port to Linux/CRIS contributed by Axis Communications.
473 \f
474 Version 2.2.2
476 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
477 we can now check for namespace violations and missing declarations. The
478 result is that almost all headers are now Unix-compliant (as defined in
479 the upcoming XPG6). The negative side is that some programs might need
480 corrections, too, if they depend on the incorrect form of the headers in
481 previous versions which defined too many symbols and included too many
482 other headers.
484 * regex now handles multibyte character sets correctly.
485 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
487 * iconv (the program) does now conform to the upcoming XPG6 and handles
488 charmaps. Instead of the charset names the path of charmaps can be
489 provided and the conversion happens based on this data.
490 Contributed by Ulrich Drepper.
492 * The locale program now provides detailed information about the installed
493 locales. While
495 locale -a
497 only lists the names of the supported locales
499 locale -a --verbose
501 provides details such as country, language, and codeset name.
502 Contributed by Ulrich Drepper.
503 \f
504 Version 2.2.1
506 * The gencat program now parses the input file according to the charset
507 selected by the LC_CTYPE category. This is important for stateful
508 character sets. To make generating catalogs easier there is a way
509 to overwrite the charset selected by the locale: before the first
510 message or $ quote line the catalog can contain a line like
512 $ codeset=ISO-8859-2
514 to select the charset (ISO-8859-2 in this case).
516 Implemented by Shinya Hanataka and Ulrich Drepper.
518 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
519 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
520 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
522 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
523 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
525 * The LANGUAGE environment variable is now ignored unless the locale is
526 changed from the default "C" locale.
528 * The usual bug fixes.
529 \f
530 Version 2.2
532 * Greg McGary added runtime support for bounds checking using gcc's
533 new -fbounded-pointers option. ix86 target is complete. PowerPC
534 is in progress.
536 * Thorsten Kukuk added secure mode support to nscd.
538 * The Berkeley db libraries have been removed.
540 Related, the nss_db module is now in a separate package since it
541 obviously requires a database library being available.
543 * Wide character I/O streams implemented by Ulrich Drepper.
545 * Functions from the extended socket API added by Ulrich Drepper.
547 * Functions feenableexcept and fedisableexcept to control the
548 behaviour of individual exceptions have been added by Andreas Jaeger.
550 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
552 * The resolver code has been updated from bind 8.2.3-T5B which supports
553 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
554 and Mark Kettenis.
556 This change could in some situations effect backward compatibility. Since
557 now `_res' is a thread-local instead of a global variable, modifying it
558 in one thread does not have any effect in other threads.
560 The resolver library was also extended to allow IPv6 as the transport
561 protocol for the requests. This work was done by Stig Venaas.
563 * Compatibility code for K&R C compilers has been removed from the
564 header files. A ISO C compiler is needed to use the library
565 (conforming to either C89 or C99 standard).
567 * Complete rewrite of the localedef program to support multibyte character
568 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
569 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
570 Implemented by Ulrich Drepper.
572 Bruno Haible significantly improved the generation and use of the data
573 structures for the wide character tables.
575 * Plural handling in gettext implemented by Ulrich Drepper.
577 * The utmp daemon has been removed.
579 * The port to MIPS-Linux has been finished by Andreas Jaeger.
581 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
582 and Yutaka Niibe.
584 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
586 * POSIX barriers implemented by Kaz Kylheku.
588 * POSIX spawn function family implemented by Ulrich Drepper.
590 * POSIX spinlocks are now available.
592 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
594 * the configure option --enable-kernel=X.Y.Z allows to strip out
595 compatibility for kernel versions before X.Y.Z. This is currently only
596 implemented for Linux.
598 * the sockaddr_in6 structure changed. The IPv6 working group added a new
599 field sin6_scope_id. This means that all programs using IPv6 should be
600 recompiled. Don't expect binary compatibility with previous glibc
601 versions.
603 * various conversion modules for IBM character sets contributed by
604 Masahide Washizawa.
606 * IA-64 port by Jes Sorensen and HJ Lu.
608 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
609 Compiling the GNU C Library for Linux/ia64
610 ******************************************
612 Please refer to the file INSTALL in the same directory as you found
613 this file for general information about configuring and compiling
614 glibc.
616 For general inquiries about glibc under Linux/ia64 please use the
617 following mailing list linux-ia64@linuxia64.org or one of the relevant
618 glibc mailing lists.
620 Recommended Tools for Compilation
621 =================================
623 In order for glibc-2.2 to build correctly on the ia64 you need at
624 least the following versions of the GNU tools (the :
626 * The Cygnus toolchain snapshot for the ia64 as of August 4
627 including the provided set of patches. It is however recommend
628 you use the October 24 toolchain snapshot or a more recent version.
630 OR alternatively you can try the following (the Cygnus toolchain is
631 the recommended solution):
633 * GCC and binutils, GAS and GNU LD out of CVS from
634 sources.redhat.com as of August 28, 2000 or later. The CVS tree
635 may require special patches to work properly on the ia64.
637 Configuring and compiling GNU Libc for Linux/ia64
638 =================================================
640 The library requires Linux kernel version 2.4.0-test4-000728 or
641 later to funtion properly. Besides that it support for debug libraries
642 is currently untested. Hence the following options
643 are required for configuring the library:
645 --disable-debug --enable-kernel=2.4.0
647 It is also important that you make sure the library picks up the
648 appropriate kernel header files, if you do not have recent enough
649 kernel headers in /usr/src/linux/include, you should use the
650 --with-headers=<path> option to specify the location.
652 As an example I personally use the following options to configure
653 the library:
655 --disable-debug
656 --disable-cvs
657 --enable-kernel=2.4.0
658 --host=ia64-linux
659 --enable-add-ons=yes
660 --prefix=/usr
661 --with-headers=/home/jes/linux/include
664 Good luck
666 Jes Sorensen <jes@linuxcare.com>,
667 November 14th, 2000
668 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
669 \f
670 Version 2.1.3
672 * bug fixes
674 \f
675 Version 2.1.2
677 * bug fixes
679 \f
680 Version 2.1.1
682 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
684 * New xdr functions are added; some rpc functions are now 64bit clean.
686 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
688 * Fixed known incompatibilities with glibc 2.0.
690 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
692 * Optimized a number of functions (especially the ELF dynamic loader).
694 * Update timezone data files.
696 * lots of charmaps corrections
698 * some new locale definitions and charmaps
700 \f
701 Version 2.1
703 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
704 conform to POSIX member type requirements. Symbol versions have been
705 adjusted as needed within the library, and for direct use by applications,
706 but there is potential for problems if third-party libraries use
707 struct timeval as part of their interface. This does not present
708 a problem for X and other "essential" system libraries.
710 * An additional locale model to support C++ Standard Library locale
711 model and probably more was implemented by Ulrich Drepper.
713 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
714 symbol level.
716 * Miles Bader provided the `argp' function family to support hierachical
717 command line argument parsing, layered on top of getopt.
719 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
721 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
722 numbers.
724 * scanf recognizes the %a and %A format for scanning floating point numbers.
726 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
727 information and interfaces for the available integer types.
729 * about 130 new math functions were added to implement the ISO C9x math
730 library.
732 * the new header <complex.h> contains definitions of the complex math
733 functions from ISO C 9X.
735 * the new header <tgmath.h> defines generic macros to use complex or
736 real valued functions.
738 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
740 * Andreas Jaeger provided a test suite for the math library.
742 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
744 * Ulrich Drepper added character set conversion functions (iconv).
746 * Optimized string functions have been added.
748 * The localedata addon is now part of glibc.
750 * An implementation of profiling shared libraries was added by Ulrich Drepper.
752 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
753 daemon for NSS (nscd).
755 Missing a better place here are some numbers on improvements. Under
756 Linux 2.1.125 un-tar-ing the kernel sources takes
758 user system wall
760 using local files 12.19s 6.88s 22.91s
762 using NIS 13.92s 8.91s 26.34s
764 using NIS & nscd 10.37s 7.34s 25.30s
766 using NIS+ 27.57s 30.37s 640.46s
768 using NIS+ & nscd 10.25s 7.83s 26.51s
770 using NIS & old nscd [1] 13.83s 8.32s 29.60s
772 Keep in mind that non-namelookup related operations dominate above times.
773 It was just a common complain that using NIS+ unpacking the kernel is
774 horribly slow.
776 [1] The old nscd implementation is not available anymore since it was
777 distributed with glibc up to version 2.0.98 and thus is now replaced.
779 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
781 * Mark Kettenis provided a Hesiod NSS module.
783 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
784 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
786 * rcmd can now handle netgroups (Dick Streefland).
788 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
789 Bambrough.
791 * Support for the IPv6 protocol has been added to the socket API, as per the
792 latest draft standards.
794 * Support for Linux 2.2 has been added.
796 * Interface changes relative to the latest 2.0.x release:
797 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
798 addseverity NEW: Unix98
799 alphasort64 NEW: LFS
800 argp_err_exit_status NEW: argp, GNU ext
801 argp_error NEW: argp, GNU ext
802 argp_failure NEW: argp, GNU ext
803 argp_help NEW: argp, GNU ext
804 argp_parse NEW: argp, GNU ext
805 argp_program_bug_address NEW: argp, GNU ext
806 argp_program_version NEW: argp, GNU ext
807 argp_program_version_hook NEW: argp, GNU ext
808 argp_state_help NEW: argp, GNU ext
809 argp_usage NEW: argp, GNU ext
810 authdes_create NEW: Secure RPC
811 authdes_getucred NEW: Secure RPC
812 authdes_pk_create NEW: Secure RPC
813 backtrace NEW: GNU ext.
814 backtrace_symbols NEW: GNU ext.
815 backtrace_symbols_fd NEW: GNU ext.
816 cacos NEW: ISO C 9x
817 cacosf NEW: ISO C 9x
818 cacosh NEW: ISO C 9x
819 cacoshf NEW: ISO C 9x
820 cacoshl NEW: ISO C 9x
821 cacosl NEW: ISO C 9x
822 capget NEW: kernel
823 capset NEW: kernel
824 carg NEW: ISO C 9x
825 cargf NEW: ISO C 9x
826 cargl NEW: ISO C 9x
827 casin NEW: ISO C 9x
828 casinf NEW: ISO C 9x
829 casinh NEW: ISO C 9x
830 casinhf NEW: ISO C 9x
831 casinhl NEW: ISO C 9x
832 casinl NEW: ISO C 9x
833 catan NEW: ISO C 9x
834 catanf NEW: ISO C 9x
835 catanh NEW: ISO C 9x
836 catanhf NEW: ISO C 9x
837 catanhl NEW: ISO C 9x
838 catanl NEW: ISO C 9x
839 cbc_crypt NEW: Secure RPC
840 ccos NEW: ISO C 9x
841 ccosf NEW: ISO C 9x
842 ccosh NEW: ISO C 9x
843 ccoshf NEW: ISO C 9x
844 ccoshl NEW: ISO C 9x
845 ccosl NEW: ISO C 9x
846 cexp NEW: ISO C 9x
847 cexpf NEW: ISO C 9x
848 cexpl NEW: ISO C 9x
849 cimag NEW: ISO C 9x
850 cimagf NEW: ISO C 9x
851 cimagl NEW: ISO C 9x
852 clearerr_locked REMOVED
853 clntunix_create NEW: sunrpc ext
854 clog NEW: ISO C 9x
855 clog10 NEW: ISO C 9x
856 clog10f NEW: ISO C 9x
857 clog10l NEW: ISO C 9x
858 clogf NEW: ISO C 9x
859 clogl NEW: ISO C 9x
860 conj NEW: ISO C 9x
861 conjf NEW: ISO C 9x
862 conjl NEW: ISO C 9x
863 cpow NEW: ISO C 9x
864 cpowf NEW: ISO C 9x
865 cpowl NEW: ISO C 9x
866 cproj NEW: ISO C 9x
867 cprojf NEW: ISO C 9x
868 cprojl NEW: ISO C 9x
869 creal NEW: ISO C 9x
870 crealf NEW: ISO C 9x
871 creall NEW: ISO C 9x
872 creat64 NEW: LFS
873 csin NEW: ISO C 9x
874 csinf NEW: ISO C 9x
875 csinh NEW: ISO C 9x
876 csinhf NEW: ISO C 9x
877 csinhl NEW: ISO C 9x
878 csinl NEW: ISO C 9x
879 csqrt NEW: ISO C 9x
880 csqrtf NEW: ISO C 9x
881 csqrtl NEW: ISO C 9x
882 ctan NEW: ISO C 9x
883 ctanf NEW: ISO C 9x
884 ctanh NEW: ISO C 9x
885 ctanhf NEW: ISO C 9x
886 ctanhl NEW: ISO C 9x
887 ctanl NEW: ISO C 9x
888 des_setparity NEW: Secure RPC
889 ecb_crypt NEW: Secure RPC
890 endutxent NEW: Unix98
891 exp10 NEW: ISO C 9x
892 exp10f NEW: ISO C 9x
893 exp10l NEW: ISO C 9x
894 exp2 NEW: ISO C 9x
895 exp2f NEW: ISO C 9x
896 exp2l NEW: ISO C 9x
897 fattach NEW: STREAMS
898 fdetach NEW: STREAMS
899 fdim NEW: ISO C 9x
900 fdimf NEW: ISO C 9x
901 fdiml NEW: ISO C 9x
902 feclearexcept NEW: ISO C 9x
903 fegetenv NEW: ISO C 9x
904 fegetexceptflag NEW: ISO C 9x
905 fegetround NEW: ISO C 9x
906 feholdexcept NEW: ISO C 9x
907 feof_locked REMOVED
908 feraiseexcept NEW: ISO C 9x
909 ferror_locked REMOVED
910 fesetenv NEW: ISO C 9x
911 fesetexceptflag NEW: ISO C 9x
912 fesetround NEW: ISO C 9x
913 fetestexcept NEW: ISO C 9x
914 feupdateenv NEW: ISO C 9x
915 fflush_locked REMOVED
916 ffsl NEW: GNU ext.
917 ffsll NEW: GNU ext.
918 fgetpos64 NEW: LFS
919 fgets_unlocked NEW: GNU ext.
920 fileno_locked REMOVED
921 fma NEW: ISO C 9x
922 fmaf NEW: ISO C 9x
923 fmal NEW: ISO C 9x
924 fmax NEW: ISO C 9x
925 fmaxf NEW: ISO C 9x
926 fmaxl NEW: ISO C 9x
927 fmin NEW: ISO C 9x
928 fminf NEW: ISO C 9x
929 fminl NEW: ISO C 9x
930 fmtmsg NEW: Unix98
931 fopen64 NEW: LFS
932 fputc_locked REMOVED
933 fputs_unlocked NEW: GNU ext.
934 fread_unlocked NEW: GNU ext.
935 freopen64 NEW: LFS
936 fseeko NEW: Unix98
937 fsetpos64 NEW: LFS
938 fstatfs64 NEW: LFS
939 fstatvfs NEW: Unix98
940 fstatvfs64 NEW: LFS
941 ftello NEW: Unix98
942 ftello64 NEW: LFS
943 ftruncate64 NEW: LFS
944 ftw64 NEW: LFS
945 fwrite_unlocked NEW: GNU ext.
946 gai_strerror NEW: IPv6
947 gamma_r REMOVED
948 gammaf_r REMOVED
949 gammal_r REMOVED
950 getchar_locked REMOVED
951 getdate NEW: Unix98
952 getdate_err NEW: Unix98
953 getdate_r NEW: GNU ext.
954 getmsg NEW: STREAMS
955 getnameinfo NEW: IPv6
956 getnetname NEW: Secure RPC
957 getpmsg NEW: STREAMS
958 getpt NEW: Unix98 PTY
959 getrlimit64 NEW: LFS
960 getutxent NEW: Unix98
961 getutxid NEW: Unix98
962 getutxline NEW: Unix98
963 glob64 NEW: GNU ext.
964 globfree64 NEW: GNU ext.
965 gnu_get_libc_release NEW: GNU ext.
966 gnu_get_libc_version NEW: GNU ext.
967 grantpt NEW: Unix98 PTY
968 host2netname NEW: Secure RPC
969 iconv NEW: iconv
970 iconv_close NEW: iconv
971 iconv_open NEW: iconv
972 if_freenameindex NEW: IPv6
973 if_indextoname NEW: IPv6
974 if_nameindex NEW: IPv6
975 if_nametoindex NEW: IPv6
976 in6addr_any NEW: IPv6
977 in6addr_loopback NEW: IPv6
978 inet6_isipv4mapped NEW: IPv6
979 isastream NEW: STREAMS
980 iswblank NEW: GNU ext.
981 key_decryptsession NEW: Secure RPC
982 key_decryptsession_pk NEW: Secure RPC
983 key_encryptsession NEW: Secure RPC
984 key_encryptsession_pk NEW: Secure RPC
985 key_gendes NEW: Secure RPC
986 key_get_conv NEW: Secure RPC
987 key_secretkey_is_set NEW: Secure RPC
988 key_setnet NEW: Secure RPC
989 key_setsecret NEW: Secure RPC
990 llrint NEW: ISO C 9x
991 llrintf NEW: ISO C 9x
992 llrintl NEW: ISO C 9x
993 llround NEW: ISO C 9x
994 llroundf NEW: ISO C 9x
995 llroundl NEW: ISO C 9x
996 log2 NEW: ISO C 9x
997 log2f NEW: ISO C 9x
998 log2l NEW: ISO C 9x
999 lrint NEW: ISO C 9x
1000 lrintf NEW: ISO C 9x
1001 lrintl NEW: ISO C 9x
1002 lround NEW: ISO C 9x
1003 lroundf NEW: ISO C 9x
1004 lroundl NEW: ISO C 9x
1005 lseek64 NEW: LFS
1006 makecontext NEW: Unix98
1007 mempcpy NEW: GNU ext.
1008 mmap64 NEW: LFS
1009 moncontrol REMOVED
1010 modify_ldt NEW: kernel
1011 nan NEW: ISO C 9x
1012 nanf NEW: ISO C 9x
1013 nanl NEW: ISO C 9x
1014 nearbyint NEW: ISO C 9x
1015 nearbyintf NEW: ISO C 9x
1016 nearbyintl NEW: ISO C 9x
1017 netname2host NEW: Secure RPC
1018 netname2user NEW: Secure RPC
1019 nexttoward NEW: ISO C 9x
1020 nexttowardf NEW: ISO C 9x
1021 nexttowardl NEW: ISO C 9x
1022 nftw NEW: Unix98
1023 nftw64 NEW: LFS
1024 open64 NEW: LFS
1025 passwd2des NEW: Secure RPC
1026 pow10 NEW: GNU ext.
1027 pow10f NEW: GNU ext.
1028 pow10l NEW: GNU ext.
1029 pread NEW: Unix98
1030 pread64 NEW: LFS
1031 printf_size NEW: GNU ext.
1032 printf_size_info NEW: GNU ext.
1033 profil_counter REMOVED
1034 pthread_mutexattr_getkind_np REPLACED
1035 pthread_mutexattr_setkind_np REPLACED
1036 ptsname NEW: Unix98 PTY
1037 ptsname_r NEW: Unix98 PTY
1038 putc_locked REMOVED
1039 putchar_locked REMOVED
1040 putgrent NEW: GNU ext.
1041 putmsg NEW: STREAMS
1042 putpmsg NEW: STREAMS
1043 pututxline NEW: Unix98
1044 pwrite NEW: Unix98
1045 pwrite64 NEW: LFS
1046 readdir64 NEW: LFS
1047 readdir64_r NEW: LFS
1048 remquo NEW: ISO C 9x
1049 remquof NEW: ISO C 9x
1050 remquol NEW: ISO C 9x
1051 round NEW: ISO C 9x
1052 roundf NEW: ISO C 9x
1053 roundl NEW: ISO C 9x
1054 rtime NEW: GNU ext.
1055 scalbln NEW: ISO C 9x
1056 scalblnf NEW: ISO C 9x
1057 scalblnl NEW: ISO C 9x
1058 scandir64 NEW: LFS
1059 sendfile NEW: kernel
1060 setcontext NEW: Unix98
1061 setrlimit64 NEW: LFS
1062 setutxent NEW: Unix98
1063 sighold NEW: Unix98
1064 sigignore NEW: Unix98
1065 sigqueue NEW: POSIX.1b
1066 sigrelse NEW: Unix98
1067 sigset NEW: POSIX.1b
1068 sigtimedwait NEW: POSIX.1b
1069 sigwaitinfo NEW: POSIX.1b
1070 sincos NEW: GNU ext.
1071 sincosf NEW: GNU ext.
1072 sincosl NEW: GNU ext.
1073 statfs64 NEW: LFS
1074 statvfs NEW: Unix98
1075 statvfs64 NEW: LFS
1076 strcasestr NEW: GNU ext.
1077 strtoimax NEW: ISO C 9x
1078 strtoumax NEW: ISO C 9x
1079 strverscmp NEW: GNU ext.
1080 svcauthdes_stats NEW: Secure RPC
1081 svcunix_create NEW: sunrpc etx
1082 svcunixfd_create NEW: sunrpc ext
1083 swapcontext NEW: Unix98
1084 tcgetsid NEW: Unix98 PTY
1085 tdestroy NEW: GNU ext.
1086 tgamma NEW: ISO C 9x
1087 tgammaf NEW: ISO C 9x
1088 tgammal NEW: ISO C 9x
1089 tmpfile64 NEW: LFS
1090 trunc NEW: ISO C 9x
1091 truncate64 NEW: LFS
1092 truncf NEW: ISO C 9x
1093 truncl NEW: ISO C 9x
1094 umount2 NEW: kernel
1095 unlockpt NEW: Unix98 PTY
1096 updwtmpx NEW: Unix98
1097 user2netname NEW: Secure RPC
1098 utmpxname NEW: Unix98
1099 versionsort NEW: GNU ext.
1100 versionsort64 NEW: GNU ext.
1101 waitid NEW: Unix98
1102 wcscasecmp NEW: GNU ext.
1103 wcsncasecmp NEW: GNU ext.
1104 wcsnlen NEW: GNU ext.
1105 wcstoimax NEW: ISO C 9x
1106 wcstoll NEW: ISO C 9x
1107 wcstoull NEW: ISO C 9x
1108 wcstoumax NEW: ISO C 9x
1109 wcswcs NEW: Unix98
1110 wordexp NEW: POSIX.2
1111 wordfree NEW: POSIX.2
1112 write_profiling REMOVED
1113 xdecrypt NEW: Secure RPC
1114 xdr_authdes_cred NEW: Secure RPC
1115 xdr_authdes_verf NEW: Secure RPC
1116 xdr_cryptkeyarg NEW: Secure RPC
1117 xdr_cryptkeyarg2 NEW: Secure RPC
1118 xdr_cryptkeyres NEW: Secure RPC
1119 xdr_getcredres NEW: Secure RPC
1120 xdr_key_netstarg NEW: Secure RPC
1121 xdr_key_netstres NEW: Secure RPC
1122 xdr_keybuf NEW: Secure RPC
1123 xdr_keystatus NEW: Secure RPC
1124 xdr_netnamestr NEW: Secure RPC
1125 xdr_sizeof NEW: Secure RPC
1126 xdr_unixcred NEW: sunrpc ext
1127 xencrypt NEW: Secure RPC
1128 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1129 \f
1130 Version 2.0.6
1132 * more bug fixes
1134 \f
1135 Version 2.0.5
1137 * more bug fixes
1139 * inet_ntoa is thread-safe
1141 * updwtmp is moved from libutil to libc
1143 * rewrite of cbrt function
1145 * update of timezone data
1146 \f
1147 Version 2.0.4
1149 * more bug fixes
1150 \f
1151 Version 2.0.3
1153 * more bug fixes
1154 \f
1155 Version 2.0.2
1157 * more bug fixes
1159 * add atoll function
1161 * fix complex problems in Berkeley DB code
1163 * fix math functions
1164 \f
1165 Version 2.0.1
1167 * fixed lots of header problems (especially Linux/GNU specific)
1169 * dynamic loader preserves all registers
1171 * Roland McGrath provided support for handling of auxiliary objects in
1172 the ELF dynamic loader.
1174 * support for parallel builds is improved
1175 \f
1176 Version 2.0
1178 * GNU extensions are no longer declared by default. To enable them you
1179 must define the macro `_GNU_SOURCE' in your program or compile with
1180 `-D_GNU_SOURCE'.
1182 * The library has changed from using GNU ld symbol aliases to using weak
1183 symbols where available. The ELF object file format supports weak
1184 symbols; GNU ld also supports weak symbols in the a.out format. (There
1185 is also now support for other GNU ld extensions in ELF. Use the
1186 `--with-elf' option to configure to indicate you have ELF, and
1187 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1188 of many files which contained only symbol aliases, reducing the size of
1189 the source and the compiled library; many other files were renamed to
1190 less cryptic names previously occupied by the symbol alias files.
1191 There is a new header file <elf.h> for programs which operate on
1192 files in the ELF format.
1194 * Converted to Autoconf version 2, so `configure' has more options.
1195 Run `configure --help' to see the details.
1197 * The library can now be configured to build profiling, highly-optimized
1198 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1199 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1200 `configure' enable building these extra libraries. The shared library is
1201 built by default when using both ELF and GNU ld. When shared libraries
1202 are enabled, the new library `-ldl' is available for arbitrary run-time
1203 loading of shared objects; its interface is defined in <dlfcn.h>. The
1204 new header file <link.h> gives access to the internals of the run-time
1205 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1206 application of same name on other systems and it provides information
1207 about dynamically linked binaries.
1209 * The C library now provides the run-time support code for profiling
1210 executables compiled with `-pg'. Programs can control the profiling code
1211 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1212 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1213 the support for this file format was contributed by David Mosberger-Tang.
1215 * The math code has been replaced with a math library based on fdlibm from
1216 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1217 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1218 functions. The math functions now reside in a separate library, so
1219 programs using them will need to use `-lm' their linking commands.
1221 * John C. Bowman contributed optimized ix87 assembler inline functions.
1223 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1224 mechanism similar to that found in Solaris 2. This is now used for the
1225 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1226 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1227 file controls what services are used for each individual database. This
1228 works by loading shared libraries with names specified in `nsswitch.conf',
1229 so service modules can be changed or added at any time without even
1230 relinking any program. Currently there are the file, db, and NIS based
1231 NSS services available.
1233 * The new functions `strtoq' and `strtouq' parse integer values from
1234 strings, like `strtol' and `strtoul', but they return `long long int' and
1235 `unsigned long long int' values, respectively (64-bit quantities).
1237 * The new functions `strtof' and `strtold' parse floating-point values from
1238 strings, like `strtod', but they return `float' and `long double' values,
1239 respectively (on some machines `double' and `long double' are the same).
1241 * Ulrich Drepper has contributed new implementations of the floating-point
1242 printing and reading code used in the `printf' family of functions and
1243 `strtod', `strtof', and `strtold'. These new functions are perfectly
1244 accurate, and much faster than the old ones.
1246 * The implementation of the POSIX locale model was completely rewritten by
1247 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1248 to compile the POSIX locale definition.
1250 * The former dummy implementations of the strcoll and strxfrm function are
1251 now replaced by fully functional code contributed by Ulrich Drepper. The
1252 collation information comes from the POSIX locale definitions.
1254 * The new header <langinfo.h> defines an interface for accessing
1255 various locale-dependent data (using the locale chosen with `setlocale').
1257 * Ulrich Drepper has contributed a new suite of functions for operation on
1258 wide-character and multibyte-character strings, in <wchar.h>;
1259 and classification and case conversion of wide characters, in <wctype.h>.
1260 These new functions are conforming to the ISO C, Amendement 1 specification.
1262 * There is now a second implementation of the standard I/O library available.
1263 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1264 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1266 * You can now use positional parameter specifications in format strings
1267 for the `printf' and `scanf' families of functions. For example,
1268 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1269 ``Number 6, Mr Jones''. This is mainly useful when providing different
1270 format strings for different languages, whose grammars may dictate
1271 different orderings of the values being printed. To support this
1272 feature, the interface for `register_printf_handler' has changed; see
1273 the header file <printf.h> for details.
1275 * The `printf' and `scanf' families of functions now understand a new
1276 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1277 to group numbers as indicated by the locale; for `scanf' and friends, this
1278 says to accept as valid only a number with all the proper grouping
1279 separators in the right places. In the default "C" locale, numbers are
1280 not grouped; but locales for specific countries will define the usual
1281 conventions (i.e. separate thousands with `,' in the US locale).
1283 * The pgrp functions have been regularized, slightly incompatibly but much
1284 less confusingly. The core functions are now `getpgid' and `setpgid',
1285 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1286 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1287 provided for compatibility. There is no longer an incompatible `getpgrp'
1288 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1290 * The new header file <fts.h> and suite of functions simplify programs that
1291 operate on directory trees. This code comes from 4.4 BSD.
1293 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1294 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1295 NSS scheme used in glibc.
1297 * There is a new malloc debugging hook `__memalign_hook'.
1299 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1300 `unsigned int' in <sys/types.h>. These are for compatibility only and
1301 their use is discouraged.
1303 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1304 done differently, so that it works even without GNU ld.
1306 * New function `euidaccess' checks allowed access to a file like `access',
1307 but using the effective IDs instead of the real IDs.
1309 * The time zone data files have been updated for the latest and greatest
1310 local time conventions of the countries of the world.
1312 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1313 see <dirent.h>.
1315 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1316 for formatting floating-point numbers. They are provided only for
1317 compatibility; new programs should use `sprintf' instead. There are
1318 also equivalent function for the `long double' floating-point type and
1319 all functions also exist in a reentrant form.
1321 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1322 functions for maintaining the login-record files (primarily of use to
1323 system programs such as `login'), and convenient functions for
1324 allocating and initializing a pseudo-terminal (pty) device.
1326 * Ulrich Drepper has contributed new support for System V style
1327 shared memory and IPC on systems that support it.
1329 * Ulrich Drepper has contributed several miscellaneous new functions found
1330 in System V: The `hsearch' family of functions provide an effective
1331 implementation of hash tables; `a64l' and `l64a' provide a very simple
1332 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1333 number generator.
1335 * Ulrich Drepper has contributed new reentrant counterparts for the
1336 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1338 * Ulrich Drepper has contributed new, highly-optimized versions of several
1339 string functions for the i486/Pentium family of processors.
1341 * Ulrich Drepper has updated the Linux-specific code, based largely
1342 on work done in Hongjiu Lu's version of GNU libc for Linux.
1343 The GNU library now supports Linux versions 2.0.10 and later,
1344 using the ELF object file format (i[3456]86-*-linux).
1346 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1348 * David Mosberger-Tang and Richard Henderson have ported the C library
1349 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1350 dynamic linking support for ELF/Alpha.
1352 * Richard Henderson contributed several Alpha optimized assembler function
1353 for arithmetic and string handling.
1355 * Ulrich Drepper has contributed a new set of message catalog functions to
1356 support multiple languages using the <libintl.h> interface, for use with
1357 his new package GNU gettext. Translation volunteers have contributed
1358 catalogs of the library's messages in Spanish, German, and Korean.
1360 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1361 program and the `catgets' function for reading the catalog files it
1362 creates. (The <libintl.h> interface is preferred; we include the
1363 <nl_types.h> interface using `catgets' only for source compatibility with
1364 programs already written to use it.)
1366 * New header file <values.h> gives SVID-compatible names for <limits.h>
1367 constants.
1369 * Various new macros, declarations, and small header files for compatibility
1370 with 4.4 BSD.
1372 * New function `group_member' is a convenient way to check if a process has
1373 a given effective group ID.
1375 * When using GCC 2.7 and later, the socket functions are now declared in a
1376 special way so that passing an argument of type `struct sockaddr_in *',
1377 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1378 `struct sockaddr *' type, does not generate a type-clash warning.
1380 * New function `error' declared in header file <error.h> is a convenient
1381 function for printing error messages and optionally exiting; this is the
1382 canonical function used in GNU programs. The new functions `err', `warn',
1383 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1384 doing the same thing.
1386 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1387 POSIX.2 `glob' function to do ~ and {...} expansion.
1389 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1390 `clearenv' which is used in POSIX.9 is also available.
1392 * New function `getsid' returns session ID number on systems that support it.
1394 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1395 files <db.h> and <mpool.h> provide a rich set of functions for several
1396 types of simple databases stored in memory and in files, and <ndbm.h> is
1397 an old `ndbm'-compatible interface using the `db' functions. Link with
1398 `-ldb' to get these functions.
1400 * New macro `strdupa' copies a string like `strdup', but uses local stack
1401 space from `alloca' instead of dynamic heap space from `malloc'.
1403 * New function `strnlen' is like `strlen' but searches only a given maximum
1404 number of characters for the null terminator. `stpncpy', `strndup' and
1405 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1406 function.
1408 * New function `statfs' in header <sys/statfs.h>.
1410 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1411 provide convenient functions for operating on blocks of null-terminated
1412 strings.
1414 * A new suite of functions in <utmp.h> handle all the details of reading
1415 and writing the utmp file.
1417 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1418 Thorsten Kukuk.
1420 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1421 completely POSIX compliant and also implemented the extended functionality
1422 to handle alternate digit representation and alternate era date formats.
1424 * Ulrich Drepper provided an implementation of the `strptime' function
1425 defined in XPG4.2 which transforms a string into a `struct tm' value.
1427 * Paul Eggert provided the tzselect shell script as part of the timezone
1428 code. The shell script makes it easy to select the correct timezone
1429 specification.
1431 * The implementation of the malloc family of functions is completely replaced
1432 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1433 The implementation uses the mmap function (if available) and it is
1434 optimized for the use in multi threaded programs.
1436 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1437 functions. This new functionality is usable by specifying a special
1438 salt string and it is compatible with implementation on *BSD systems.
1440 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1441 `getsubopt' to handle second level command line options, `bsd_signal'
1442 to access BSD style `signal' functionality, the obsolete `regexp' style
1443 expression matcher.
1445 * the `lchown' function is available on system which support this
1446 functionality.
1448 * The implementation of the shadow password handling function was contributed
1449 by Ulrich Drepper.
1451 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1453 * POSIX.1g support was added. The <sys/select.h> header is available,
1454 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1455 implementation of `getaddrinfo'.
1456 \f
1457 Version 1.09
1459 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1461 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1462 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1464 * The new function `daemon' from 4.4 BSD is useful for server programs that
1465 want to put themselves in the background.
1467 * Joel Sherrill has contributed support for several standalone boards that
1468 run without an operating system.
1470 * `printf', `scanf' and friends now accept a `q' type modifier for long
1471 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1473 * All of the code taken from BSD (notably most of the math and networking
1474 routines) has been updated from the BSD 4.4-Lite release.
1476 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1478 * The new functions `getdomainname' and `setdomainname' fetch or change the
1479 YP/NIS domain name. These are system calls which exist on systems which
1480 have YP (aka NIS).
1482 * The time zone data files have been updated for the latest international
1483 conventions.
1485 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1486 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1487 \f
1488 Version 1.08
1490 * The C library now includes support for Sun RPC, from Sun's free
1491 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1492 are included. (There is still no support for YP.)
1494 * Tom Quinn has contributed a port of the C library to SGI machines running
1495 Irix 4 (mips-sgi-irix4).
1497 * The new `lockf' function is a simplified interface to the locking
1498 facilities of `fcntl', included for compatibility.
1500 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1502 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1504 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1505 compatibility.
1507 * The error message printed by `assert' for a failed assertion now includes
1508 the name of the program (if using GNU ld) and the name of the calling
1509 function (with versions of GCC that support this).
1511 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1513 * The library now includes the <sys/mman.h> header file and memory
1514 management functions `mmap', `munmap', `mprotect', `msync', and
1515 `madvise', on systems that support those facilities.
1517 * The interface for `mcheck' has changed slightly: the function called to
1518 abort the program when an allocation inconsistency is detected now takes
1519 an argument that indicates the type of failure. The new function
1520 `mprobe' lets you request a consistency check for a particular block at
1521 any time (checks are normally done only when you call `free' or `realloc'
1522 on a block).
1524 * It is now possible to easily cross-compile the C library, building on one
1525 system a library to run on another machine and/or operating system. All
1526 you need to do is set the variable `HOST_CC' in `configparms' to the
1527 native compiler for programs to run on the machine you are building on (a
1528 few generator programs are used on Unix systems); set `CC' to the
1529 cross-compiler.
1531 * The new function `fexecve' (only implemented on the GNU system) executes
1532 a program file given a file descriptor already open on the file.
1533 \f
1534 Version 1.07
1536 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1537 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1539 * You can set the variable `libprefix' in `configparms' to specify a prefix
1540 to be prepended to installed library files; this makes it easy to install
1541 the GNU C library to be linked as `-lgnuc' or whatever.
1543 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1544 copies a limited number of characters from a string, and returns the
1545 address of the last character written.
1547 * You no longer need to check for whether the installed `stddef.h' is
1548 compatible with the GNU C library. configure now checks for you.
1550 * You can now define a per-stream `fileno' function to convert the
1551 stream's cookie into an integral file descriptor.
1553 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1554 allocates zero bytes of storage, and returns a unique pointer which
1555 you can pass to `realloc' or `free'. The behavior is undefined if
1556 you dereference this pointer.
1558 * The C library now runs on Sony NEWS m68k machines running either
1559 NewsOS 3 or NewsOS 4.
1561 * The new `syscall' function is a system-dependent primitive function
1562 for invoking system calls. It has the canonical behavior on Unix
1563 systems, including unreliable return values for some calls (such as
1564 `pipe', `fork' and `getppid').
1566 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1567 to `EAGAIN', which is the preferred name. On systems whose kernels
1568 use two distinct codes, the C library now translates EWOULDBLOCK to
1569 EAGAIN in every system call function.
1570 \f
1571 Version 1.06
1573 * The GNU C Library Reference Manual is now distributed with the library.
1574 `make dvi' will produce a DVI file of the printed manual.
1575 `make info' will produce Info files that you can read on line using C-h i
1576 in Emacs or the `info' program.
1577 Please send comments on the manual to bug-glibc-manual@gnu.org.
1579 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1581 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1583 * Jason Merrill has contributed a port to the Sequent Symmetry running
1584 Dynix version 3 (i386-sequent-dynix).
1586 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1587 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1589 * New function `memory_warnings' lets you arrange to get warnings when
1590 malloc is running out of memory to allocate, like Emacs gives you.
1592 * The C library now contains the relocating allocator used in Emacs 19 for
1593 its editing buffers. This allocator (ralloc) minimizes allocation
1594 overhead and fragmentation by moving allocated regions around whenever it
1595 needs to. You always refer to a ralloc'd region with a "handle" (a
1596 pointer to a pointer--an object of type `void **').
1598 * There is a new `printf' format: `%m' gives you the string corresponding
1599 to the error code in `errno'.
1601 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1602 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1603 pass, the `a' modifier says to fill in a `char **' you pass with a
1604 malloc'd string.
1606 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1607 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1608 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1610 * `mkstemp' is a traditional Unix function to atomically create and open a
1611 uniquely-named temporary file.
1612 \f
1613 Version 1.05
1615 * The standard location for the file that says what the local timezone is
1616 has changed again. It is now `/usr/local/etc/localtime' (or more
1617 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1619 * The distribution no longer contains any files with names longer than 14
1620 characters.
1622 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1623 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1625 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1626 \f
1627 Version 1.04
1629 * The configuration process has changed quite a bit. The `configure'
1630 script is now used just like the configuration scripts for other GNU
1631 packages. The `sysdeps' directory hierarchy is much rearranged.
1632 The file `INSTALL' explains the new scheme in detail.
1634 * The header files no longer need to be processed into ANSI C and
1635 traditional C versions. There is just one set of files to install, and
1636 it will work with ANSI or old C compilers (including `gcc -traditional').
1638 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1639 MIPS DECStation running Ultrix 4.
1641 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1642 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1643 made itself into a shared library.
1645 * Yet further improved support for the i386, running 4.3 BSD-like systems
1646 (such as Mach 3 with the Unix single-server), or System V.
1648 * New function `strncasecmp' to do case-insensitive string comparison
1649 with limited length.
1651 * New function `strsep' is a reentrant alternative to `strtok'.
1653 * New functions `scandir' and `alphasort' for searching directories.
1655 * New function `setenv' is a better interface to `putenv'.
1657 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1658 function for traversing a directory tree.
1660 * The GNU obstack package is now also part of the C library.
1661 The new function `open_obstack_stream' creates a stdio stream that
1662 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1663 formatted output directly to an obstack.
1665 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1666 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1668 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1670 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1671 things to your strings.
1673 * There are some new test programs: test-fseek, testmb, and testrand.
1675 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1676 These ports are not finished, but are a good starting place for really
1677 supporting those systems.
1679 * `/etc/localtime' is now the standard location for the file that says what
1680 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1681 This follows the general principle that `/etc' is the place for all local
1682 configuration files.
1684 * The C library header files now use `extern "C"' when used by the C++
1685 compiler, so the C library should now work with C++ code.
1687 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1688 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1689 in <strings.h>.)
1691 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1692 function which uses the `merge sort' algorithm, and is said to be
1693 significantly faster than the old GNU `qsort' function. Merge sort is
1694 now the standard `qsort' function. The new algorithm can require a lot
1695 of temporary storage; so, the old sorting function is called when the
1696 required storage is not available.
1698 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1699 provides the Unix `crypt' function, plus some other entry points.
1701 * The code and header files taken from 4.4 BSD have been updated with the
1702 latest files released from Berkeley.
1703 \f
1704 ----------------------------------------------------------------------
1705 Copyright information:
1707 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1708 Free Software Foundation, Inc.
1710 Permission is granted to anyone to make or distribute verbatim copies
1711 of this document as received, in any medium, provided that the
1712 copyright notice and this permission notice are preserved,
1713 thus giving the recipient permission to redistribute in turn.
1715 Permission is granted to distribute modified versions
1716 of this document, or of portions of it,
1717 under the above conditions, provided also that they
1718 carry prominent notices stating who last changed them.
1719 \f
1720 Local variables:
1721 version-control: never
1722 End: