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1 GNU C Library NEWS -- history of user-visible changes. 2009-4-23
2 Copyright (C) 1992-2008, 2009 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 2.10
10 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
11 Implemented by Ulrich Drepper.
13 * New Linux interfaces: accept4, fallocate, fallocate64.
14 Implemented by Ulrich Drepper.
16 * Correct declarations of string function when used in C++ code. This
17 could lead to compile errors for invalid C++ code.
19 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
20 now in POSIX.
22 * New POSIX 2008 interface: psiginfo
23 Implemented by Ulrich Drepper.
25 * New ISO C++1x interfaces: quick_exit, at_quick_exit
26 Implemented by Ulrich Drepper.
28 * Support for selecting between multiple function definitions at runtime
29 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
31 * The libcrypt library can now use the hash function implementations in
32 NSS. Implemented by Ulrich Drepper.
34 * The malloc implementation can be compiled to be less memory efficient
35 but higher performing in multi-threaded programs.
36 Implemented by Ulrich Drepper.
38 * New locales: nan_TW@latin, ks_IN
40 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
41 Implemented by Ulrich Drepper.
43 * Extended printf hook support. It is possible to use user-defined types
44 and extend existing format specifiers.
45 Implemented by Ulrich Drepper.
47 * Handling for group shadow files has been added.
48 Implemented by Ulrich Drepper.
50 \f
51 Version 2.9
53 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
54 up at the same time. Implemented by Ulrich Drepper.
56 * TLS descriptors for LD and GD on x86 and x86-64.
57 Implemented by Alexandre Oliva.
59 * getaddrinfo now handles DCCP and UDPlite.
60 Implemented by Ulrich Drepper.
62 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
63 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
64 Implemented by Ulrich Drepper.
66 * New implementation of memmem, strstr, and strcasestr which is O(n).
67 Implemented by Eric Blake.
69 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
71 * Implement "e" option for popen to open file descriptor with the
72 close-on-exec flag set. Implemented by Ulrich Drepper.
74 * Implement "b" mode for fmemopen. In this mode writes writes don't
75 implicitly add a NUL byte and seeks from the end of the buffer really
76 use the buffer end, not the string length as the basis.
77 Implemented by Ulrich Drepper.
79 * Many functions, exported and internal, now atomically set the close-on-exec
80 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
82 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
83 Sinhala)
84 Implemented by Pravin Satpute.
86 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
87 \f
88 Version 2.8
90 * New locales: bo_CN, bo_IN, shs_CA.
92 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
94 * Sorting rules for some Indian languages (Devanagari and Gujarati).
95 Implemented by Pravin Satpute.
97 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
99 * nscd caches now all timeouts for DNS entries
100 Implemented by Ulrich Drepper.
102 * nscd is more efficient and wakes up less often.
103 Implemented by Ulrich Drepper.
105 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
106 vdprintf, and obstack_vprintf.
107 Implemented by Jakub Jelinek.
109 * Faster memset for x86-64.
110 Implemented by Harsha Jagasia and H.J. Lu.
112 * Faster memcpy on x86.
113 Implemented by Ulrich Drepper.
115 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
116 Implemented by Ulrich Drepper.
118 * Faster sqrt and sqrtf implemention for some PPC variants.
119 Implemented by Stephen Munroe.
120 \f
121 Version 2.7
123 * More checking functions: fread, fread_unlocked, open*, mq_open.
124 Implemented by Jakub Jelinek and Ulrich Drepper.
126 * Extend fortification to C++. Implemented by Jakub Jelinek.
128 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
129 by not recognizing 'a' as a modifier when those specs are requested.
130 Implemented by Jakub Jelinek.
132 * PPC optimizations to math and string functions.
133 Implemented by Steven Munroe.
135 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
136 options to be passed. Implemented by Ulrich Drepper.
138 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
140 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
141 Implemented by Ulrich Drepper.
143 * Handle private futexes in the NPTL implementation.
144 Implemented by Jakub Jelinek and Ulrich Drepper.
146 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
147 Implemented by Roland McGrath and Ulrich Drepper.
149 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
151 * SHA-256 and SHA-512 based password encryption.
152 Implemented by Ulrich Drepper.
154 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
155 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
156 yo_NG.
158 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
159 Implemented by Ulrich Drepper.
160 \f
161 Version 2.6
163 * New Linux interfaces: epoll_pwait, sched_getcpu.
165 * New generic interfaces: strerror_l.
167 * nscd can now cache the services database. Implemented by Ulrich Drepper.
169 \f
170 Version 2.5
172 * For Linux, the sorting of addresses returned by getaddrinfo now also
173 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
174 Implemented by Ulrich Drepper.
176 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
177 Implemented by Ulrich Drepper.
179 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
181 * New iconv module for MIK. Contributed by Alexander Shopov.
183 * For sites with broken group and/or passwd database, the auto-propagate
184 option of nscd can prevent creating ID lookup entries from the results
185 of a name lookup and vice versa. This usually is no problem but some
186 site might have problems with the default behavior.
187 Implemented by Ulrich Drepper.
189 * Iterating over entire database in NIS can be slow. With the
190 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
191 to trade time for memory. The entire database will be read at once.
192 Implemented by Ulrich Drepper.
194 * The interfaces introduced in RFC 3542 have been implemented by
195 Ulrich Drepper.
197 * Support for the new ELF hash table format was added by Ulrich Drepper.
199 * Support for priority inheritance mutexes added by Jakub Jelinek and
200 Ulrich Drepper.
202 * Support for priority protected mutexes added by Jakub Jelinek.
204 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
205 or_IN, csb_PL, fy_NL, sr_ME.
206 \f
207 Version 2.4
209 * More overflow detection functions.
211 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
212 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
214 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
215 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
216 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
217 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
218 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
219 by Masahide Washizawa.
221 * It is now possible to install audit libraries for the dynamic linker using
222 LD_AUDIT. Implemented by Ulrich Drepper.
224 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
225 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
226 For a libc and libpthread that works well on Linux 2.4 kernels, we
227 recommend using the stable 2.3 branch.
229 * The new function open_wmemstream acts like open_memstream,
230 but uses a wchar_t wide character buffer.
232 * The new function ppoll is an improved version of poll, similar to pselect.
234 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
235 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
236 renameat, unlinkat, linkat, symlinkat, readlinkat.
238 * New Linux kernel system calls: unshare,
239 inotify_init, inotify_add_watch, inotify_rm_watch.
241 * The euidaccess function is now also known by the alias eaccess,
242 for compatibility with some other systems.
244 * Timezone data updated to 2006b version.
245 \f
246 Version 2.3.6
248 * The following bugs are resolved with this release:
250 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
251 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
252 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
253 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
254 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
255 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
257 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
259 * As of this release, GCC 4 can be used to compile the C Library.
261 * Timezone data updated to 2005m version.
262 \f
263 Version 2.3.5
265 * The following bugs are resolved with this release:
267 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
268 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
269 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
270 777, 787, 821, 822, 823, 825
272 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
273 \f
274 Version 2.3.4
276 * Support for RFC 3678. Real implementations exist only for Linux so far.
277 Implemented by Ulrich Drepper.
279 * nscd can now cache entries persistently. Expiring entries are reloaded.
280 For speedups the cache can be shared in memory with client processes.
281 Implemented by Ulrich Drepper.
283 * nscd can now perform SELinux checks.
284 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
286 * getaddrinfo queries are now cached. Canonical name lookup is performed
287 efficiently.
288 Implemented by Ulrich Drepper.
290 * The nothrow function attribute is used when headers are used by gcc when
291 compiling C code. This can avoid significant amounts of exception
292 handling data.
294 * The malloc functions perform more error checking and are stricter when
295 it comes to reacting on errors. The default action is to terminate
296 the process after showing an error message. Implemented by Ulrich Drepper.
298 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
299 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
301 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
302 namespaces using the new function dlmopen(). This feature is of course,
303 like most other dynamic loading functionality, not available in statically
304 linked applications. Implemented by Ulrich Drepper.
306 * Low-overhead boundary checking variants of string and some stdio functions
307 were added. These are to be used in conjunction with a gcc patch by
308 Jakub Jelinek which adds calls to these functions if possible.
309 Implemented by Jakub Jelinek and Ulrich Drepper.
311 * Old code for several operating systems and machine architectures that
312 have not been in working condition in a long time have been removed from
313 the main source tree maintained by the GNU C Library's maintainers.
314 These files are now reside in the separate `ports' source module
315 that is usable as an add-on when building the library.
316 \f
317 Version 2.3.3
319 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
320 interrogate the dynamic linker, compatible with the Solaris interface.
322 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
323 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
325 * getifaddrs now uses the netlink interface on Linux to get its information.
326 Implemented by Thorsten Kukuk.
328 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
329 Implemented by Ulrich Drepper.
331 * support for non-executable stacks on x86 has been added. Changes mostly
332 by Roland McGrath.
334 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
335 and Ulrich Drepper.
337 * getaddrinfo now performs destination address selection according to
338 RFC 3484.
339 \f
340 Version 2.3.2
342 * Thread-safe interfaces for many functions that access locale data
343 were added in version 2.3, but these features were omitted from NEWS.
344 Many functions have variants with an `_l' suffix that take a `locale_t'
345 object as a parameter rather than consulting the current locale.
346 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
347 create and maintain `locale_t' objects. Additionally, the new function
348 `uselocale' sets "the current locale" (as used by functions not so
349 parameterized) set for an individual thread. These features were added
350 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
352 * The functions getresuid, getresgid, setresuid, and setresgid, which
353 have long been available on Linux, are now declared in <unistd.h>
354 and are now also available on the Hurd.
356 * ELF thread-local storage support (TLS) now works on x86-64.
358 * The new dynamic string token $LIB is expanded in shared library names.
359 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
361 * Aldy Hernandez contributed complete software floating point support for
362 PowerPC machines with no FPU.
364 * fexecve is implemented on Linux.
366 * The `btowc' function should work at least twice as fast due to
367 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
369 * With approriate thread add-ons cancelable functions are now implemented
370 in libc.so as well. No need to call the function in libpthread. This
371 change allowed to finally disable the incorrect and expensive handling
372 of weak definition in ld.so.
374 * Yet more PLT entries in libc.so have been removed. We finally arrived
375 at the bare minimum. Startup times improved appropriately.
377 * Support for the new Linux/x86 system call interface was added. The
378 AT_SYSINFO auxiliary vector entry is recognized and handled.
379 \f
380 Version 2.3
382 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
383 charsets.
385 * iconv (the program and the interface) now accepts empty names (excluding
386 options like //TRANSLIT) to mean "use charset of current locale".
388 * localedef can now transliterate characters in strings which are not in
389 the provided charmap. The information from the input locale is used.
391 * Prelinking support was added for ELF targets. This requires additional
392 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
394 * Read-only stdio streams now use mmap to speed up operation by eliminating
395 copying and buffer underflows. To use add 'm' to the mode string of
396 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
398 * The malloc functions were completely rewritten by Wolfram Gloger based
399 on Doug Lea's malloc-2.7.0.c.
401 * Isamu Hasegawa contributed a completely new and POSIX-conformant
402 implementation of regex.
404 * Bruno Haible upgraded the iconv and locale implementation to support
405 Unicode 3.2.
407 * Contents of the LC_* and LANG environment variables in the CEN style are
408 not recognized anymore. It never was used. Change by Ulrich Drepper.
410 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
411 thread-local storage (TLS) ABI on some platforms.
412 Changes by Ulrich Drepper. SH support by Kaz Kojima.
414 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
415 EUC-JISX0213, and TSCII.
417 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
418 BSD-compatible interface for getting all network interface addresses.
419 Implementation for IPv4 by Roland McGrath.
421 * Loading of locale data is faster due to the introduction of a locale
422 archive. Implemented by Roland McGrath and Ulrich Drepper.
424 * Startup times are significantly reduced by not using exported functions
425 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
426 and Ulrich Drepper.
428 * Steven Munroe contributed a port to PowerPC64/Linux.
429 \f
430 Version 2.2.6
432 * The Hurd now uses the GNU libio implementation of stdio rather than the
433 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
435 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
436 with the same behavior as the Linux system call of the same name.
437 \f
438 Version 2.2.5
440 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
441 128-bit long double format.
443 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
444 IBM1161, and IBM1162 charsets.
446 * Andreas Jaeger contributed a port to x86-64/Linux.
448 * Peter Bruin contributed a port to PowerPC/Hurd.
450 * libc functions using I/O streams now can handle wide-oriented streams
451 as well.
453 * optimizations in the dynamic linker. Binaries created by recent binutils
454 versions start up quicker due to reduced time spent on relocations.
456 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
457 \f
458 Version 2.2.4
460 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
461 asinh, atanh, j0 for the 128-bit long double format.
463 * Bruno Haible updated all the code handling Unicode in some form to
464 support Unicode 3.1.
466 * Speed of regex for single-byte locales is back to previous levels.
467 Patch by Isamu Hasegawa.
469 * Alpha, SPARC, and IA-64 now also using floating stacks.
471 * Startup time of internationalized applications greatly improved through
472 iconv cache. Use iconvconfig to generate the cache file.
473 Contributed by Ulrich Drepper.
475 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
476 severe performance problems. Patch by David Mosberger.
478 * The Hurd port got a lot more functionality like AIO, various stdio
479 extensions, etc. Mainly done by Roland McGrath.
481 * mtrace can now lookup symbols in shared libraries.
482 \f
483 Version 2.2.3
485 * Intel's IA-64 math library is largely integrated. It provides fast and
486 accurate implementatations for most basic and standard math functions
487 in float, double, and long double format.
489 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
490 and asin for the 96-bit long double format and asin, log, tan for the
491 128-bit long double format.
493 * The beginning of a last-bit accurate math library by IBM Haifa were added.
494 The basic double functions exist today. Contributed by Abraham Ziv
495 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
496 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
498 * An asynchronous name lookup library was added. The interface is designed
499 after POSIX AIO. The proposal was circulated beforehand to get comments.
500 No negative ones came in. Implemented by Ulrich Drepper.
502 * Port to S390/64bit contributed by Martin Schwidefsky
503 <schwidefsky@de.ibm.com>.
505 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
506 of functions for Linux/IA-64.
508 * The RPC code is now thread safe. Threads can now use the same service
509 of different services at the same time. Patch by Eric Norum
510 <eric.norum@usask.ca> with some help by Ulrich Drepper.
512 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
513 family of functions for Linux/S390.
515 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
516 of functions for Linux/x86.
518 * Port to Linux/CRIS contributed by Axis Communications.
519 \f
520 Version 2.2.2
522 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
523 we can now check for namespace violations and missing declarations. The
524 result is that almost all headers are now Unix-compliant (as defined in
525 the upcoming XPG6). The negative side is that some programs might need
526 corrections, too, if they depend on the incorrect form of the headers in
527 previous versions which defined too many symbols and included too many
528 other headers.
530 * regex now handles multibyte character sets correctly.
531 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
533 * iconv (the program) does now conform to the upcoming XPG6 and handles
534 charmaps. Instead of the charset names the path of charmaps can be
535 provided and the conversion happens based on this data.
536 Contributed by Ulrich Drepper.
538 * The locale program now provides detailed information about the installed
539 locales. While
541 locale -a
543 only lists the names of the supported locales
545 locale -a --verbose
547 provides details such as country, language, and codeset name.
548 Contributed by Ulrich Drepper.
549 \f
550 Version 2.2.1
552 * The gencat program now parses the input file according to the charset
553 selected by the LC_CTYPE category. This is important for stateful
554 character sets. To make generating catalogs easier there is a way
555 to overwrite the charset selected by the locale: before the first
556 message or $ quote line the catalog can contain a line like
558 $ codeset=ISO-8859-2
560 to select the charset (ISO-8859-2 in this case).
562 Implemented by Shinya Hanataka and Ulrich Drepper.
564 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
565 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
566 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
568 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
569 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
571 * The LANGUAGE environment variable is now ignored unless the locale is
572 changed from the default "C" locale.
574 * The usual bug fixes.
575 \f
576 Version 2.2
578 * Greg McGary added runtime support for bounds checking using gcc's
579 new -fbounded-pointers option. ix86 target is complete. PowerPC
580 is in progress.
582 * Thorsten Kukuk added secure mode support to nscd.
584 * The Berkeley db libraries have been removed.
586 Related, the nss_db module is now in a separate package since it
587 obviously requires a database library being available.
589 * Wide character I/O streams implemented by Ulrich Drepper.
591 * Functions from the extended socket API added by Ulrich Drepper.
593 * Functions feenableexcept and fedisableexcept to control the
594 behaviour of individual exceptions have been added by Andreas Jaeger.
596 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
598 * The resolver code has been updated from bind 8.2.3-T5B which supports
599 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
600 and Mark Kettenis.
602 This change could in some situations effect backward compatibility. Since
603 now `_res' is a thread-local instead of a global variable, modifying it
604 in one thread does not have any effect in other threads.
606 The resolver library was also extended to allow IPv6 as the transport
607 protocol for the requests. This work was done by Stig Venaas.
609 * Compatibility code for K&R C compilers has been removed from the
610 header files. A ISO C compiler is needed to use the library
611 (conforming to either C89 or C99 standard).
613 * Complete rewrite of the localedef program to support multibyte character
614 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
615 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
616 Implemented by Ulrich Drepper.
618 Bruno Haible significantly improved the generation and use of the data
619 structures for the wide character tables.
621 * Plural handling in gettext implemented by Ulrich Drepper.
623 * The utmp daemon has been removed.
625 * The port to MIPS-Linux has been finished by Andreas Jaeger.
627 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
628 and Yutaka Niibe.
630 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
632 * POSIX barriers implemented by Kaz Kylheku.
634 * POSIX spawn function family implemented by Ulrich Drepper.
636 * POSIX spinlocks are now available.
638 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
640 * the configure option --enable-kernel=X.Y.Z allows to strip out
641 compatibility for kernel versions before X.Y.Z. This is currently only
642 implemented for Linux.
644 * the sockaddr_in6 structure changed. The IPv6 working group added a new
645 field sin6_scope_id. This means that all programs using IPv6 should be
646 recompiled. Don't expect binary compatibility with previous glibc
647 versions.
649 * various conversion modules for IBM character sets contributed by
650 Masahide Washizawa.
652 * IA-64 port by Jes Sorensen and HJ Lu.
654 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
655 Compiling the GNU C Library for Linux/ia64
656 ******************************************
658 Please refer to the file INSTALL in the same directory as you found
659 this file for general information about configuring and compiling
660 glibc.
662 For general inquiries about glibc under Linux/ia64 please use the
663 following mailing list linux-ia64@linuxia64.org or one of the relevant
664 glibc mailing lists.
666 Recommended Tools for Compilation
667 =================================
669 In order for glibc-2.2 to build correctly on the ia64 you need at
670 least the following versions of the GNU tools (the :
672 * The Cygnus toolchain snapshot for the ia64 as of August 4
673 including the provided set of patches. It is however recommend
674 you use the October 24 toolchain snapshot or a more recent version.
676 OR alternatively you can try the following (the Cygnus toolchain is
677 the recommended solution):
679 * GCC and binutils, GAS and GNU LD out of CVS from
680 sources.redhat.com as of August 28, 2000 or later. The CVS tree
681 may require special patches to work properly on the ia64.
683 Configuring and compiling GNU Libc for Linux/ia64
684 =================================================
686 The library requires Linux kernel version 2.4.0-test4-000728 or
687 later to funtion properly. Besides that it support for debug libraries
688 is currently untested. Hence the following options
689 are required for configuring the library:
691 --disable-debug --enable-kernel=2.4.0
693 It is also important that you make sure the library picks up the
694 appropriate kernel header files, if you do not have recent enough
695 kernel headers in /usr/src/linux/include, you should use the
696 --with-headers=<path> option to specify the location.
698 As an example I personally use the following options to configure
699 the library:
701 --disable-debug
702 --disable-cvs
703 --enable-kernel=2.4.0
704 --host=ia64-linux
705 --enable-add-ons=yes
706 --prefix=/usr
707 --with-headers=/home/jes/linux/include
710 Good luck
712 Jes Sorensen <jes@linuxcare.com>,
713 November 14th, 2000
714 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
715 \f
716 Version 2.1.3
718 * bug fixes
720 \f
721 Version 2.1.2
723 * bug fixes
725 \f
726 Version 2.1.1
728 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
730 * New xdr functions are added; some rpc functions are now 64bit clean.
732 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
734 * Fixed known incompatibilities with glibc 2.0.
736 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
738 * Optimized a number of functions (especially the ELF dynamic loader).
740 * Update timezone data files.
742 * lots of charmaps corrections
744 * some new locale definitions and charmaps
746 \f
747 Version 2.1
749 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
750 conform to POSIX member type requirements. Symbol versions have been
751 adjusted as needed within the library, and for direct use by applications,
752 but there is potential for problems if third-party libraries use
753 struct timeval as part of their interface. This does not present
754 a problem for X and other "essential" system libraries.
756 * An additional locale model to support C++ Standard Library locale
757 model and probably more was implemented by Ulrich Drepper.
759 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
760 symbol level.
762 * Miles Bader provided the `argp' function family to support hierachical
763 command line argument parsing, layered on top of getopt.
765 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
767 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
768 numbers.
770 * scanf recognizes the %a and %A format for scanning floating point numbers.
772 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
773 information and interfaces for the available integer types.
775 * about 130 new math functions were added to implement the ISO C9x math
776 library.
778 * the new header <complex.h> contains definitions of the complex math
779 functions from ISO C 9X.
781 * the new header <tgmath.h> defines generic macros to use complex or
782 real valued functions.
784 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
786 * Andreas Jaeger provided a test suite for the math library.
788 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
790 * Ulrich Drepper added character set conversion functions (iconv).
792 * Optimized string functions have been added.
794 * The localedata addon is now part of glibc.
796 * An implementation of profiling shared libraries was added by Ulrich Drepper.
798 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
799 daemon for NSS (nscd).
801 Missing a better place here are some numbers on improvements. Under
802 Linux 2.1.125 un-tar-ing the kernel sources takes
804 user system wall
806 using local files 12.19s 6.88s 22.91s
808 using NIS 13.92s 8.91s 26.34s
810 using NIS & nscd 10.37s 7.34s 25.30s
812 using NIS+ 27.57s 30.37s 640.46s
814 using NIS+ & nscd 10.25s 7.83s 26.51s
816 using NIS & old nscd [1] 13.83s 8.32s 29.60s
818 Keep in mind that non-namelookup related operations dominate above times.
819 It was just a common complain that using NIS+ unpacking the kernel is
820 horribly slow.
822 [1] The old nscd implementation is not available anymore since it was
823 distributed with glibc up to version 2.0.98 and thus is now replaced.
825 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
827 * Mark Kettenis provided a Hesiod NSS module.
829 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
830 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
832 * rcmd can now handle netgroups (Dick Streefland).
834 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
835 Bambrough.
837 * Support for the IPv6 protocol has been added to the socket API, as per the
838 latest draft standards.
840 * Support for Linux 2.2 has been added.
842 * Interface changes relative to the latest 2.0.x release:
843 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
844 addseverity NEW: Unix98
845 alphasort64 NEW: LFS
846 argp_err_exit_status NEW: argp, GNU ext
847 argp_error NEW: argp, GNU ext
848 argp_failure NEW: argp, GNU ext
849 argp_help NEW: argp, GNU ext
850 argp_parse NEW: argp, GNU ext
851 argp_program_bug_address NEW: argp, GNU ext
852 argp_program_version NEW: argp, GNU ext
853 argp_program_version_hook NEW: argp, GNU ext
854 argp_state_help NEW: argp, GNU ext
855 argp_usage NEW: argp, GNU ext
856 authdes_create NEW: Secure RPC
857 authdes_getucred NEW: Secure RPC
858 authdes_pk_create NEW: Secure RPC
859 backtrace NEW: GNU ext.
860 backtrace_symbols NEW: GNU ext.
861 backtrace_symbols_fd NEW: GNU ext.
862 cacos NEW: ISO C 9x
863 cacosf NEW: ISO C 9x
864 cacosh NEW: ISO C 9x
865 cacoshf NEW: ISO C 9x
866 cacoshl NEW: ISO C 9x
867 cacosl NEW: ISO C 9x
868 capget NEW: kernel
869 capset NEW: kernel
870 carg NEW: ISO C 9x
871 cargf NEW: ISO C 9x
872 cargl NEW: ISO C 9x
873 casin NEW: ISO C 9x
874 casinf NEW: ISO C 9x
875 casinh NEW: ISO C 9x
876 casinhf NEW: ISO C 9x
877 casinhl NEW: ISO C 9x
878 casinl NEW: ISO C 9x
879 catan NEW: ISO C 9x
880 catanf NEW: ISO C 9x
881 catanh NEW: ISO C 9x
882 catanhf NEW: ISO C 9x
883 catanhl NEW: ISO C 9x
884 catanl NEW: ISO C 9x
885 cbc_crypt NEW: Secure RPC
886 ccos NEW: ISO C 9x
887 ccosf NEW: ISO C 9x
888 ccosh NEW: ISO C 9x
889 ccoshf NEW: ISO C 9x
890 ccoshl NEW: ISO C 9x
891 ccosl NEW: ISO C 9x
892 cexp NEW: ISO C 9x
893 cexpf NEW: ISO C 9x
894 cexpl NEW: ISO C 9x
895 cimag NEW: ISO C 9x
896 cimagf NEW: ISO C 9x
897 cimagl NEW: ISO C 9x
898 clearerr_locked REMOVED
899 clntunix_create NEW: sunrpc ext
900 clog NEW: ISO C 9x
901 clog10 NEW: ISO C 9x
902 clog10f NEW: ISO C 9x
903 clog10l NEW: ISO C 9x
904 clogf NEW: ISO C 9x
905 clogl NEW: ISO C 9x
906 conj NEW: ISO C 9x
907 conjf NEW: ISO C 9x
908 conjl NEW: ISO C 9x
909 cpow NEW: ISO C 9x
910 cpowf NEW: ISO C 9x
911 cpowl NEW: ISO C 9x
912 cproj NEW: ISO C 9x
913 cprojf NEW: ISO C 9x
914 cprojl NEW: ISO C 9x
915 creal NEW: ISO C 9x
916 crealf NEW: ISO C 9x
917 creall NEW: ISO C 9x
918 creat64 NEW: LFS
919 csin NEW: ISO C 9x
920 csinf NEW: ISO C 9x
921 csinh NEW: ISO C 9x
922 csinhf NEW: ISO C 9x
923 csinhl NEW: ISO C 9x
924 csinl NEW: ISO C 9x
925 csqrt NEW: ISO C 9x
926 csqrtf NEW: ISO C 9x
927 csqrtl NEW: ISO C 9x
928 ctan NEW: ISO C 9x
929 ctanf NEW: ISO C 9x
930 ctanh NEW: ISO C 9x
931 ctanhf NEW: ISO C 9x
932 ctanhl NEW: ISO C 9x
933 ctanl NEW: ISO C 9x
934 des_setparity NEW: Secure RPC
935 ecb_crypt NEW: Secure RPC
936 endutxent NEW: Unix98
937 exp10 NEW: ISO C 9x
938 exp10f NEW: ISO C 9x
939 exp10l NEW: ISO C 9x
940 exp2 NEW: ISO C 9x
941 exp2f NEW: ISO C 9x
942 exp2l NEW: ISO C 9x
943 fattach NEW: STREAMS
944 fdetach NEW: STREAMS
945 fdim NEW: ISO C 9x
946 fdimf NEW: ISO C 9x
947 fdiml NEW: ISO C 9x
948 feclearexcept NEW: ISO C 9x
949 fegetenv NEW: ISO C 9x
950 fegetexceptflag NEW: ISO C 9x
951 fegetround NEW: ISO C 9x
952 feholdexcept NEW: ISO C 9x
953 feof_locked REMOVED
954 feraiseexcept NEW: ISO C 9x
955 ferror_locked REMOVED
956 fesetenv NEW: ISO C 9x
957 fesetexceptflag NEW: ISO C 9x
958 fesetround NEW: ISO C 9x
959 fetestexcept NEW: ISO C 9x
960 feupdateenv NEW: ISO C 9x
961 fflush_locked REMOVED
962 ffsl NEW: GNU ext.
963 ffsll NEW: GNU ext.
964 fgetpos64 NEW: LFS
965 fgets_unlocked NEW: GNU ext.
966 fileno_locked REMOVED
967 fma NEW: ISO C 9x
968 fmaf NEW: ISO C 9x
969 fmal NEW: ISO C 9x
970 fmax NEW: ISO C 9x
971 fmaxf NEW: ISO C 9x
972 fmaxl NEW: ISO C 9x
973 fmin NEW: ISO C 9x
974 fminf NEW: ISO C 9x
975 fminl NEW: ISO C 9x
976 fmtmsg NEW: Unix98
977 fopen64 NEW: LFS
978 fputc_locked REMOVED
979 fputs_unlocked NEW: GNU ext.
980 fread_unlocked NEW: GNU ext.
981 freopen64 NEW: LFS
982 fseeko NEW: Unix98
983 fsetpos64 NEW: LFS
984 fstatfs64 NEW: LFS
985 fstatvfs NEW: Unix98
986 fstatvfs64 NEW: LFS
987 ftello NEW: Unix98
988 ftello64 NEW: LFS
989 ftruncate64 NEW: LFS
990 ftw64 NEW: LFS
991 fwrite_unlocked NEW: GNU ext.
992 gai_strerror NEW: IPv6
993 gamma_r REMOVED
994 gammaf_r REMOVED
995 gammal_r REMOVED
996 getchar_locked REMOVED
997 getdate NEW: Unix98
998 getdate_err NEW: Unix98
999 getdate_r NEW: GNU ext.
1000 getmsg NEW: STREAMS
1001 getnameinfo NEW: IPv6
1002 getnetname NEW: Secure RPC
1003 getpmsg NEW: STREAMS
1004 getpt NEW: Unix98 PTY
1005 getrlimit64 NEW: LFS
1006 getutxent NEW: Unix98
1007 getutxid NEW: Unix98
1008 getutxline NEW: Unix98
1009 glob64 NEW: GNU ext.
1010 globfree64 NEW: GNU ext.
1011 gnu_get_libc_release NEW: GNU ext.
1012 gnu_get_libc_version NEW: GNU ext.
1013 grantpt NEW: Unix98 PTY
1014 host2netname NEW: Secure RPC
1015 iconv NEW: iconv
1016 iconv_close NEW: iconv
1017 iconv_open NEW: iconv
1018 if_freenameindex NEW: IPv6
1019 if_indextoname NEW: IPv6
1020 if_nameindex NEW: IPv6
1021 if_nametoindex NEW: IPv6
1022 in6addr_any NEW: IPv6
1023 in6addr_loopback NEW: IPv6
1024 inet6_isipv4mapped NEW: IPv6
1025 isastream NEW: STREAMS
1026 iswblank NEW: GNU ext.
1027 key_decryptsession NEW: Secure RPC
1028 key_decryptsession_pk NEW: Secure RPC
1029 key_encryptsession NEW: Secure RPC
1030 key_encryptsession_pk NEW: Secure RPC
1031 key_gendes NEW: Secure RPC
1032 key_get_conv NEW: Secure RPC
1033 key_secretkey_is_set NEW: Secure RPC
1034 key_setnet NEW: Secure RPC
1035 key_setsecret NEW: Secure RPC
1036 llrint NEW: ISO C 9x
1037 llrintf NEW: ISO C 9x
1038 llrintl NEW: ISO C 9x
1039 llround NEW: ISO C 9x
1040 llroundf NEW: ISO C 9x
1041 llroundl NEW: ISO C 9x
1042 log2 NEW: ISO C 9x
1043 log2f NEW: ISO C 9x
1044 log2l NEW: ISO C 9x
1045 lrint NEW: ISO C 9x
1046 lrintf NEW: ISO C 9x
1047 lrintl NEW: ISO C 9x
1048 lround NEW: ISO C 9x
1049 lroundf NEW: ISO C 9x
1050 lroundl NEW: ISO C 9x
1051 lseek64 NEW: LFS
1052 makecontext NEW: Unix98
1053 mempcpy NEW: GNU ext.
1054 mmap64 NEW: LFS
1055 moncontrol REMOVED
1056 modify_ldt NEW: kernel
1057 nan NEW: ISO C 9x
1058 nanf NEW: ISO C 9x
1059 nanl NEW: ISO C 9x
1060 nearbyint NEW: ISO C 9x
1061 nearbyintf NEW: ISO C 9x
1062 nearbyintl NEW: ISO C 9x
1063 netname2host NEW: Secure RPC
1064 netname2user NEW: Secure RPC
1065 nexttoward NEW: ISO C 9x
1066 nexttowardf NEW: ISO C 9x
1067 nexttowardl NEW: ISO C 9x
1068 nftw NEW: Unix98
1069 nftw64 NEW: LFS
1070 open64 NEW: LFS
1071 passwd2des NEW: Secure RPC
1072 pow10 NEW: GNU ext.
1073 pow10f NEW: GNU ext.
1074 pow10l NEW: GNU ext.
1075 pread NEW: Unix98
1076 pread64 NEW: LFS
1077 printf_size NEW: GNU ext.
1078 printf_size_info NEW: GNU ext.
1079 profil_counter REMOVED
1080 pthread_mutexattr_getkind_np REPLACED
1081 pthread_mutexattr_setkind_np REPLACED
1082 ptsname NEW: Unix98 PTY
1083 ptsname_r NEW: Unix98 PTY
1084 putc_locked REMOVED
1085 putchar_locked REMOVED
1086 putgrent NEW: GNU ext.
1087 putmsg NEW: STREAMS
1088 putpmsg NEW: STREAMS
1089 pututxline NEW: Unix98
1090 pwrite NEW: Unix98
1091 pwrite64 NEW: LFS
1092 readdir64 NEW: LFS
1093 readdir64_r NEW: LFS
1094 remquo NEW: ISO C 9x
1095 remquof NEW: ISO C 9x
1096 remquol NEW: ISO C 9x
1097 round NEW: ISO C 9x
1098 roundf NEW: ISO C 9x
1099 roundl NEW: ISO C 9x
1100 rtime NEW: GNU ext.
1101 scalbln NEW: ISO C 9x
1102 scalblnf NEW: ISO C 9x
1103 scalblnl NEW: ISO C 9x
1104 scandir64 NEW: LFS
1105 sendfile NEW: kernel
1106 setcontext NEW: Unix98
1107 setrlimit64 NEW: LFS
1108 setutxent NEW: Unix98
1109 sighold NEW: Unix98
1110 sigignore NEW: Unix98
1111 sigqueue NEW: POSIX.1b
1112 sigrelse NEW: Unix98
1113 sigset NEW: POSIX.1b
1114 sigtimedwait NEW: POSIX.1b
1115 sigwaitinfo NEW: POSIX.1b
1116 sincos NEW: GNU ext.
1117 sincosf NEW: GNU ext.
1118 sincosl NEW: GNU ext.
1119 statfs64 NEW: LFS
1120 statvfs NEW: Unix98
1121 statvfs64 NEW: LFS
1122 strcasestr NEW: GNU ext.
1123 strtoimax NEW: ISO C 9x
1124 strtoumax NEW: ISO C 9x
1125 strverscmp NEW: GNU ext.
1126 svcauthdes_stats NEW: Secure RPC
1127 svcunix_create NEW: sunrpc etx
1128 svcunixfd_create NEW: sunrpc ext
1129 swapcontext NEW: Unix98
1130 tcgetsid NEW: Unix98 PTY
1131 tdestroy NEW: GNU ext.
1132 tgamma NEW: ISO C 9x
1133 tgammaf NEW: ISO C 9x
1134 tgammal NEW: ISO C 9x
1135 tmpfile64 NEW: LFS
1136 trunc NEW: ISO C 9x
1137 truncate64 NEW: LFS
1138 truncf NEW: ISO C 9x
1139 truncl NEW: ISO C 9x
1140 umount2 NEW: kernel
1141 unlockpt NEW: Unix98 PTY
1142 updwtmpx NEW: Unix98
1143 user2netname NEW: Secure RPC
1144 utmpxname NEW: Unix98
1145 versionsort NEW: GNU ext.
1146 versionsort64 NEW: GNU ext.
1147 waitid NEW: Unix98
1148 wcscasecmp NEW: GNU ext.
1149 wcsncasecmp NEW: GNU ext.
1150 wcsnlen NEW: GNU ext.
1151 wcstoimax NEW: ISO C 9x
1152 wcstoll NEW: ISO C 9x
1153 wcstoull NEW: ISO C 9x
1154 wcstoumax NEW: ISO C 9x
1155 wcswcs NEW: Unix98
1156 wordexp NEW: POSIX.2
1157 wordfree NEW: POSIX.2
1158 write_profiling REMOVED
1159 xdecrypt NEW: Secure RPC
1160 xdr_authdes_cred NEW: Secure RPC
1161 xdr_authdes_verf NEW: Secure RPC
1162 xdr_cryptkeyarg NEW: Secure RPC
1163 xdr_cryptkeyarg2 NEW: Secure RPC
1164 xdr_cryptkeyres NEW: Secure RPC
1165 xdr_getcredres NEW: Secure RPC
1166 xdr_key_netstarg NEW: Secure RPC
1167 xdr_key_netstres NEW: Secure RPC
1168 xdr_keybuf NEW: Secure RPC
1169 xdr_keystatus NEW: Secure RPC
1170 xdr_netnamestr NEW: Secure RPC
1171 xdr_sizeof NEW: Secure RPC
1172 xdr_unixcred NEW: sunrpc ext
1173 xencrypt NEW: Secure RPC
1174 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1175 \f
1176 Version 2.0.6
1178 * more bug fixes
1180 \f
1181 Version 2.0.5
1183 * more bug fixes
1185 * inet_ntoa is thread-safe
1187 * updwtmp is moved from libutil to libc
1189 * rewrite of cbrt function
1191 * update of timezone data
1192 \f
1193 Version 2.0.4
1195 * more bug fixes
1196 \f
1197 Version 2.0.3
1199 * more bug fixes
1200 \f
1201 Version 2.0.2
1203 * more bug fixes
1205 * add atoll function
1207 * fix complex problems in Berkeley DB code
1209 * fix math functions
1210 \f
1211 Version 2.0.1
1213 * fixed lots of header problems (especially Linux/GNU specific)
1215 * dynamic loader preserves all registers
1217 * Roland McGrath provided support for handling of auxiliary objects in
1218 the ELF dynamic loader.
1220 * support for parallel builds is improved
1221 \f
1222 Version 2.0
1224 * GNU extensions are no longer declared by default. To enable them you
1225 must define the macro `_GNU_SOURCE' in your program or compile with
1226 `-D_GNU_SOURCE'.
1228 * The library has changed from using GNU ld symbol aliases to using weak
1229 symbols where available. The ELF object file format supports weak
1230 symbols; GNU ld also supports weak symbols in the a.out format. (There
1231 is also now support for other GNU ld extensions in ELF. Use the
1232 `--with-elf' option to configure to indicate you have ELF, and
1233 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1234 of many files which contained only symbol aliases, reducing the size of
1235 the source and the compiled library; many other files were renamed to
1236 less cryptic names previously occupied by the symbol alias files.
1237 There is a new header file <elf.h> for programs which operate on
1238 files in the ELF format.
1240 * Converted to Autoconf version 2, so `configure' has more options.
1241 Run `configure --help' to see the details.
1243 * The library can now be configured to build profiling, highly-optimized
1244 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1245 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1246 `configure' enable building these extra libraries. The shared library is
1247 built by default when using both ELF and GNU ld. When shared libraries
1248 are enabled, the new library `-ldl' is available for arbitrary run-time
1249 loading of shared objects; its interface is defined in <dlfcn.h>. The
1250 new header file <link.h> gives access to the internals of the run-time
1251 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1252 application of same name on other systems and it provides information
1253 about dynamically linked binaries.
1255 * The C library now provides the run-time support code for profiling
1256 executables compiled with `-pg'. Programs can control the profiling code
1257 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1258 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1259 the support for this file format was contributed by David Mosberger-Tang.
1261 * The math code has been replaced with a math library based on fdlibm from
1262 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1263 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1264 functions. The math functions now reside in a separate library, so
1265 programs using them will need to use `-lm' their linking commands.
1267 * John C. Bowman contributed optimized ix87 assembler inline functions.
1269 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1270 mechanism similar to that found in Solaris 2. This is now used for the
1271 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1272 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1273 file controls what services are used for each individual database. This
1274 works by loading shared libraries with names specified in `nsswitch.conf',
1275 so service modules can be changed or added at any time without even
1276 relinking any program. Currently there are the file, db, and NIS based
1277 NSS services available.
1279 * The new functions `strtoq' and `strtouq' parse integer values from
1280 strings, like `strtol' and `strtoul', but they return `long long int' and
1281 `unsigned long long int' values, respectively (64-bit quantities).
1283 * The new functions `strtof' and `strtold' parse floating-point values from
1284 strings, like `strtod', but they return `float' and `long double' values,
1285 respectively (on some machines `double' and `long double' are the same).
1287 * Ulrich Drepper has contributed new implementations of the floating-point
1288 printing and reading code used in the `printf' family of functions and
1289 `strtod', `strtof', and `strtold'. These new functions are perfectly
1290 accurate, and much faster than the old ones.
1292 * The implementation of the POSIX locale model was completely rewritten by
1293 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1294 to compile the POSIX locale definition.
1296 * The former dummy implementations of the strcoll and strxfrm function are
1297 now replaced by fully functional code contributed by Ulrich Drepper. The
1298 collation information comes from the POSIX locale definitions.
1300 * The new header <langinfo.h> defines an interface for accessing
1301 various locale-dependent data (using the locale chosen with `setlocale').
1303 * Ulrich Drepper has contributed a new suite of functions for operation on
1304 wide-character and multibyte-character strings, in <wchar.h>;
1305 and classification and case conversion of wide characters, in <wctype.h>.
1306 These new functions are conforming to the ISO C, Amendement 1 specification.
1308 * There is now a second implementation of the standard I/O library available.
1309 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1310 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1312 * You can now use positional parameter specifications in format strings
1313 for the `printf' and `scanf' families of functions. For example,
1314 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1315 ``Number 6, Mr Jones''. This is mainly useful when providing different
1316 format strings for different languages, whose grammars may dictate
1317 different orderings of the values being printed. To support this
1318 feature, the interface for `register_printf_handler' has changed; see
1319 the header file <printf.h> for details.
1321 * The `printf' and `scanf' families of functions now understand a new
1322 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1323 to group numbers as indicated by the locale; for `scanf' and friends, this
1324 says to accept as valid only a number with all the proper grouping
1325 separators in the right places. In the default "C" locale, numbers are
1326 not grouped; but locales for specific countries will define the usual
1327 conventions (i.e. separate thousands with `,' in the US locale).
1329 * The pgrp functions have been regularized, slightly incompatibly but much
1330 less confusingly. The core functions are now `getpgid' and `setpgid',
1331 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1332 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1333 provided for compatibility. There is no longer an incompatible `getpgrp'
1334 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1336 * The new header file <fts.h> and suite of functions simplify programs that
1337 operate on directory trees. This code comes from 4.4 BSD.
1339 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1340 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1341 NSS scheme used in glibc.
1343 * There is a new malloc debugging hook `__memalign_hook'.
1345 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1346 `unsigned int' in <sys/types.h>. These are for compatibility only and
1347 their use is discouraged.
1349 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1350 done differently, so that it works even without GNU ld.
1352 * New function `euidaccess' checks allowed access to a file like `access',
1353 but using the effective IDs instead of the real IDs.
1355 * The time zone data files have been updated for the latest and greatest
1356 local time conventions of the countries of the world.
1358 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1359 see <dirent.h>.
1361 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1362 for formatting floating-point numbers. They are provided only for
1363 compatibility; new programs should use `sprintf' instead. There are
1364 also equivalent function for the `long double' floating-point type and
1365 all functions also exist in a reentrant form.
1367 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1368 functions for maintaining the login-record files (primarily of use to
1369 system programs such as `login'), and convenient functions for
1370 allocating and initializing a pseudo-terminal (pty) device.
1372 * Ulrich Drepper has contributed new support for System V style
1373 shared memory and IPC on systems that support it.
1375 * Ulrich Drepper has contributed several miscellaneous new functions found
1376 in System V: The `hsearch' family of functions provide an effective
1377 implementation of hash tables; `a64l' and `l64a' provide a very simple
1378 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1379 number generator.
1381 * Ulrich Drepper has contributed new reentrant counterparts for the
1382 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1384 * Ulrich Drepper has contributed new, highly-optimized versions of several
1385 string functions for the i486/Pentium family of processors.
1387 * Ulrich Drepper has updated the Linux-specific code, based largely
1388 on work done in Hongjiu Lu's version of GNU libc for Linux.
1389 The GNU library now supports Linux versions 2.0.10 and later,
1390 using the ELF object file format (i[3456]86-*-linux).
1392 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1394 * David Mosberger-Tang and Richard Henderson have ported the C library
1395 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1396 dynamic linking support for ELF/Alpha.
1398 * Richard Henderson contributed several Alpha optimized assembler function
1399 for arithmetic and string handling.
1401 * Ulrich Drepper has contributed a new set of message catalog functions to
1402 support multiple languages using the <libintl.h> interface, for use with
1403 his new package GNU gettext. Translation volunteers have contributed
1404 catalogs of the library's messages in Spanish, German, and Korean.
1406 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1407 program and the `catgets' function for reading the catalog files it
1408 creates. (The <libintl.h> interface is preferred; we include the
1409 <nl_types.h> interface using `catgets' only for source compatibility with
1410 programs already written to use it.)
1412 * New header file <values.h> gives SVID-compatible names for <limits.h>
1413 constants.
1415 * Various new macros, declarations, and small header files for compatibility
1416 with 4.4 BSD.
1418 * New function `group_member' is a convenient way to check if a process has
1419 a given effective group ID.
1421 * When using GCC 2.7 and later, the socket functions are now declared in a
1422 special way so that passing an argument of type `struct sockaddr_in *',
1423 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1424 `struct sockaddr *' type, does not generate a type-clash warning.
1426 * New function `error' declared in header file <error.h> is a convenient
1427 function for printing error messages and optionally exiting; this is the
1428 canonical function used in GNU programs. The new functions `err', `warn',
1429 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1430 doing the same thing.
1432 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1433 POSIX.2 `glob' function to do ~ and {...} expansion.
1435 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1436 `clearenv' which is used in POSIX.9 is also available.
1438 * New function `getsid' returns session ID number on systems that support it.
1440 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1441 files <db.h> and <mpool.h> provide a rich set of functions for several
1442 types of simple databases stored in memory and in files, and <ndbm.h> is
1443 an old `ndbm'-compatible interface using the `db' functions. Link with
1444 `-ldb' to get these functions.
1446 * New macro `strdupa' copies a string like `strdup', but uses local stack
1447 space from `alloca' instead of dynamic heap space from `malloc'.
1449 * New function `strnlen' is like `strlen' but searches only a given maximum
1450 number of characters for the null terminator. `stpncpy', `strndup' and
1451 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1452 function.
1454 * New function `statfs' in header <sys/statfs.h>.
1456 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1457 provide convenient functions for operating on blocks of null-terminated
1458 strings.
1460 * A new suite of functions in <utmp.h> handle all the details of reading
1461 and writing the utmp file.
1463 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1464 Thorsten Kukuk.
1466 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1467 completely POSIX compliant and also implemented the extended functionality
1468 to handle alternate digit representation and alternate era date formats.
1470 * Ulrich Drepper provided an implementation of the `strptime' function
1471 defined in XPG4.2 which transforms a string into a `struct tm' value.
1473 * Paul Eggert provided the tzselect shell script as part of the timezone
1474 code. The shell script makes it easy to select the correct timezone
1475 specification.
1477 * The implementation of the malloc family of functions is completely replaced
1478 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1479 The implementation uses the mmap function (if available) and it is
1480 optimized for the use in multi threaded programs.
1482 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1483 functions. This new functionality is usable by specifying a special
1484 salt string and it is compatible with implementation on *BSD systems.
1486 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1487 `getsubopt' to handle second level command line options, `bsd_signal'
1488 to access BSD style `signal' functionality, the obsolete `regexp' style
1489 expression matcher.
1491 * the `lchown' function is available on system which support this
1492 functionality.
1494 * The implementation of the shadow password handling function was contributed
1495 by Ulrich Drepper.
1497 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1499 * POSIX.1g support was added. The <sys/select.h> header is available,
1500 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1501 implementation of `getaddrinfo'.
1502 \f
1503 Version 1.09
1505 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1507 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1508 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1510 * The new function `daemon' from 4.4 BSD is useful for server programs that
1511 want to put themselves in the background.
1513 * Joel Sherrill has contributed support for several standalone boards that
1514 run without an operating system.
1516 * `printf', `scanf' and friends now accept a `q' type modifier for long
1517 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1519 * All of the code taken from BSD (notably most of the math and networking
1520 routines) has been updated from the BSD 4.4-Lite release.
1522 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1524 * The new functions `getdomainname' and `setdomainname' fetch or change the
1525 YP/NIS domain name. These are system calls which exist on systems which
1526 have YP (aka NIS).
1528 * The time zone data files have been updated for the latest international
1529 conventions.
1531 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1532 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1533 \f
1534 Version 1.08
1536 * The C library now includes support for Sun RPC, from Sun's free
1537 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1538 are included. (There is still no support for YP.)
1540 * Tom Quinn has contributed a port of the C library to SGI machines running
1541 Irix 4 (mips-sgi-irix4).
1543 * The new `lockf' function is a simplified interface to the locking
1544 facilities of `fcntl', included for compatibility.
1546 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1548 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1550 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1551 compatibility.
1553 * The error message printed by `assert' for a failed assertion now includes
1554 the name of the program (if using GNU ld) and the name of the calling
1555 function (with versions of GCC that support this).
1557 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1559 * The library now includes the <sys/mman.h> header file and memory
1560 management functions `mmap', `munmap', `mprotect', `msync', and
1561 `madvise', on systems that support those facilities.
1563 * The interface for `mcheck' has changed slightly: the function called to
1564 abort the program when an allocation inconsistency is detected now takes
1565 an argument that indicates the type of failure. The new function
1566 `mprobe' lets you request a consistency check for a particular block at
1567 any time (checks are normally done only when you call `free' or `realloc'
1568 on a block).
1570 * It is now possible to easily cross-compile the C library, building on one
1571 system a library to run on another machine and/or operating system. All
1572 you need to do is set the variable `HOST_CC' in `configparms' to the
1573 native compiler for programs to run on the machine you are building on (a
1574 few generator programs are used on Unix systems); set `CC' to the
1575 cross-compiler.
1577 * The new function `fexecve' (only implemented on the GNU system) executes
1578 a program file given a file descriptor already open on the file.
1579 \f
1580 Version 1.07
1582 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1583 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1585 * You can set the variable `libprefix' in `configparms' to specify a prefix
1586 to be prepended to installed library files; this makes it easy to install
1587 the GNU C library to be linked as `-lgnuc' or whatever.
1589 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1590 copies a limited number of characters from a string, and returns the
1591 address of the last character written.
1593 * You no longer need to check for whether the installed `stddef.h' is
1594 compatible with the GNU C library. configure now checks for you.
1596 * You can now define a per-stream `fileno' function to convert the
1597 stream's cookie into an integral file descriptor.
1599 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1600 allocates zero bytes of storage, and returns a unique pointer which
1601 you can pass to `realloc' or `free'. The behavior is undefined if
1602 you dereference this pointer.
1604 * The C library now runs on Sony NEWS m68k machines running either
1605 NewsOS 3 or NewsOS 4.
1607 * The new `syscall' function is a system-dependent primitive function
1608 for invoking system calls. It has the canonical behavior on Unix
1609 systems, including unreliable return values for some calls (such as
1610 `pipe', `fork' and `getppid').
1612 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1613 to `EAGAIN', which is the preferred name. On systems whose kernels
1614 use two distinct codes, the C library now translates EWOULDBLOCK to
1615 EAGAIN in every system call function.
1616 \f
1617 Version 1.06
1619 * The GNU C Library Reference Manual is now distributed with the library.
1620 `make dvi' will produce a DVI file of the printed manual.
1621 `make info' will produce Info files that you can read on line using C-h i
1622 in Emacs or the `info' program.
1623 Please send comments on the manual to bug-glibc-manual@gnu.org.
1625 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1627 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1629 * Jason Merrill has contributed a port to the Sequent Symmetry running
1630 Dynix version 3 (i386-sequent-dynix).
1632 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1633 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1635 * New function `memory_warnings' lets you arrange to get warnings when
1636 malloc is running out of memory to allocate, like Emacs gives you.
1638 * The C library now contains the relocating allocator used in Emacs 19 for
1639 its editing buffers. This allocator (ralloc) minimizes allocation
1640 overhead and fragmentation by moving allocated regions around whenever it
1641 needs to. You always refer to a ralloc'd region with a "handle" (a
1642 pointer to a pointer--an object of type `void **').
1644 * There is a new `printf' format: `%m' gives you the string corresponding
1645 to the error code in `errno'.
1647 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1648 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1649 pass, the `a' modifier says to fill in a `char **' you pass with a
1650 malloc'd string.
1652 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1653 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1654 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1656 * `mkstemp' is a traditional Unix function to atomically create and open a
1657 uniquely-named temporary file.
1658 \f
1659 Version 1.05
1661 * The standard location for the file that says what the local timezone is
1662 has changed again. It is now `/usr/local/etc/localtime' (or more
1663 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1665 * The distribution no longer contains any files with names longer than 14
1666 characters.
1668 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1669 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1671 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1672 \f
1673 Version 1.04
1675 * The configuration process has changed quite a bit. The `configure'
1676 script is now used just like the configuration scripts for other GNU
1677 packages. The `sysdeps' directory hierarchy is much rearranged.
1678 The file `INSTALL' explains the new scheme in detail.
1680 * The header files no longer need to be processed into ANSI C and
1681 traditional C versions. There is just one set of files to install, and
1682 it will work with ANSI or old C compilers (including `gcc -traditional').
1684 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1685 MIPS DECStation running Ultrix 4.
1687 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1688 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1689 made itself into a shared library.
1691 * Yet further improved support for the i386, running 4.3 BSD-like systems
1692 (such as Mach 3 with the Unix single-server), or System V.
1694 * New function `strncasecmp' to do case-insensitive string comparison
1695 with limited length.
1697 * New function `strsep' is a reentrant alternative to `strtok'.
1699 * New functions `scandir' and `alphasort' for searching directories.
1701 * New function `setenv' is a better interface to `putenv'.
1703 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1704 function for traversing a directory tree.
1706 * The GNU obstack package is now also part of the C library.
1707 The new function `open_obstack_stream' creates a stdio stream that
1708 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1709 formatted output directly to an obstack.
1711 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1712 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1714 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1716 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1717 things to your strings.
1719 * There are some new test programs: test-fseek, testmb, and testrand.
1721 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1722 These ports are not finished, but are a good starting place for really
1723 supporting those systems.
1725 * `/etc/localtime' is now the standard location for the file that says what
1726 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1727 This follows the general principle that `/etc' is the place for all local
1728 configuration files.
1730 * The C library header files now use `extern "C"' when used by the C++
1731 compiler, so the C library should now work with C++ code.
1733 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1734 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1735 in <strings.h>.)
1737 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1738 function which uses the `merge sort' algorithm, and is said to be
1739 significantly faster than the old GNU `qsort' function. Merge sort is
1740 now the standard `qsort' function. The new algorithm can require a lot
1741 of temporary storage; so, the old sorting function is called when the
1742 required storage is not available.
1744 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1745 provides the Unix `crypt' function, plus some other entry points.
1747 * The code and header files taken from 4.4 BSD have been updated with the
1748 latest files released from Berkeley.
1749 \f
1750 ----------------------------------------------------------------------
1751 Copyright information:
1753 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1754 Free Software Foundation, Inc.
1756 Permission is granted to anyone to make or distribute verbatim copies
1757 of this document as received, in any medium, provided that the
1758 copyright notice and this permission notice are preserved,
1759 thus giving the recipient permission to redistribute in turn.
1761 Permission is granted to distribute modified versions
1762 of this document, or of portions of it,
1763 under the above conditions, provided also that they
1764 carry prominent notices stating who last changed them.
1765 \f
1766 Local variables:
1767 version-control: never
1768 End: