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1 GNU C Library NEWS -- history of user-visible changes. 2009-4-13
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 \f
48 Version 2.9
50 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
51 up at the same time. Implemented by Ulrich Drepper.
53 * TLS descriptors for LD and GD on x86 and x86-64.
54 Implemented by Alexandre Oliva.
56 * getaddrinfo now handles DCCP and UDPlite.
57 Implemented by Ulrich Drepper.
59 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
60 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
61 Implemented by Ulrich Drepper.
63 * New implementation of memmem, strstr, and strcasestr which is O(n).
64 Implemented by Eric Blake.
66 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
68 * Implement "e" option for popen to open file descriptor with the
69 close-on-exec flag set. Implemented by Ulrich Drepper.
71 * Implement "b" mode for fmemopen. In this mode writes writes don't
72 implicitly add a NUL byte and seeks from the end of the buffer really
73 use the buffer end, not the string length as the basis.
74 Implemented by Ulrich Drepper.
76 * Many functions, exported and internal, now atomically set the close-on-exec
77 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
79 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
80 Sinhala)
81 Implemented by Pravin Satpute.
83 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
84 \f
85 Version 2.8
87 * New locales: bo_CN, bo_IN, shs_CA.
89 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
91 * Sorting rules for some Indian languages (Devanagari and Gujarati).
92 Implemented by Pravin Satpute.
94 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
96 * nscd caches now all timeouts for DNS entries
97 Implemented by Ulrich Drepper.
99 * nscd is more efficient and wakes up less often.
100 Implemented by Ulrich Drepper.
102 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
103 vdprintf, and obstack_vprintf.
104 Implemented by Jakub Jelinek.
106 * Faster memset for x86-64.
107 Implemented by Harsha Jagasia and H.J. Lu.
109 * Faster memcpy on x86.
110 Implemented by Ulrich Drepper.
112 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
113 Implemented by Ulrich Drepper.
115 * Faster sqrt and sqrtf implemention for some PPC variants.
116 Implemented by Stephen Munroe.
117 \f
118 Version 2.7
120 * More checking functions: fread, fread_unlocked, open*, mq_open.
121 Implemented by Jakub Jelinek and Ulrich Drepper.
123 * Extend fortification to C++. Implemented by Jakub Jelinek.
125 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
126 by not recognizing 'a' as a modifier when those specs are requested.
127 Implemented by Jakub Jelinek.
129 * PPC optimizations to math and string functions.
130 Implemented by Steven Munroe.
132 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
133 options to be passed. Implemented by Ulrich Drepper.
135 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
137 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
138 Implemented by Ulrich Drepper.
140 * Handle private futexes in the NPTL implementation.
141 Implemented by Jakub Jelinek and Ulrich Drepper.
143 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
144 Implemented by Roland McGrath and Ulrich Drepper.
146 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
148 * SHA-256 and SHA-512 based password encryption.
149 Implemented by Ulrich Drepper.
151 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
152 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
153 yo_NG.
155 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
156 Implemented by Ulrich Drepper.
157 \f
158 Version 2.6
160 * New Linux interfaces: epoll_pwait, sched_getcpu.
162 * New generic interfaces: strerror_l.
164 * nscd can now cache the services database. Implemented by Ulrich Drepper.
166 \f
167 Version 2.5
169 * For Linux, the sorting of addresses returned by getaddrinfo now also
170 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
171 Implemented by Ulrich Drepper.
173 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
174 Implemented by Ulrich Drepper.
176 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
178 * New iconv module for MIK. Contributed by Alexander Shopov.
180 * For sites with broken group and/or passwd database, the auto-propagate
181 option of nscd can prevent creating ID lookup entries from the results
182 of a name lookup and vice versa. This usually is no problem but some
183 site might have problems with the default behavior.
184 Implemented by Ulrich Drepper.
186 * Iterating over entire database in NIS can be slow. With the
187 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
188 to trade time for memory. The entire database will be read at once.
189 Implemented by Ulrich Drepper.
191 * The interfaces introduced in RFC 3542 have been implemented by
192 Ulrich Drepper.
194 * Support for the new ELF hash table format was added by Ulrich Drepper.
196 * Support for priority inheritance mutexes added by Jakub Jelinek and
197 Ulrich Drepper.
199 * Support for priority protected mutexes added by Jakub Jelinek.
201 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
202 or_IN, csb_PL, fy_NL, sr_ME.
203 \f
204 Version 2.4
206 * More overflow detection functions.
208 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
209 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
211 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
212 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
213 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
214 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
215 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
216 by Masahide Washizawa.
218 * It is now possible to install audit libraries for the dynamic linker using
219 LD_AUDIT. Implemented by Ulrich Drepper.
221 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
222 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
223 For a libc and libpthread that works well on Linux 2.4 kernels, we
224 recommend using the stable 2.3 branch.
226 * The new function open_wmemstream acts like open_memstream,
227 but uses a wchar_t wide character buffer.
229 * The new function ppoll is an improved version of poll, similar to pselect.
231 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
232 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
233 renameat, unlinkat, linkat, symlinkat, readlinkat.
235 * New Linux kernel system calls: unshare,
236 inotify_init, inotify_add_watch, inotify_rm_watch.
238 * The euidaccess function is now also known by the alias eaccess,
239 for compatibility with some other systems.
241 * Timezone data updated to 2006b version.
242 \f
243 Version 2.3.6
245 * The following bugs are resolved with this release:
247 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
248 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
249 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
250 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
251 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
252 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
254 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
256 * As of this release, GCC 4 can be used to compile the C Library.
258 * Timezone data updated to 2005m version.
259 \f
260 Version 2.3.5
262 * The following bugs are resolved with this release:
264 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
265 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
266 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
267 777, 787, 821, 822, 823, 825
269 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
270 \f
271 Version 2.3.4
273 * Support for RFC 3678. Real implementations exist only for Linux so far.
274 Implemented by Ulrich Drepper.
276 * nscd can now cache entries persistently. Expiring entries are reloaded.
277 For speedups the cache can be shared in memory with client processes.
278 Implemented by Ulrich Drepper.
280 * nscd can now perform SELinux checks.
281 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
283 * getaddrinfo queries are now cached. Canonical name lookup is performed
284 efficiently.
285 Implemented by Ulrich Drepper.
287 * The nothrow function attribute is used when headers are used by gcc when
288 compiling C code. This can avoid significant amounts of exception
289 handling data.
291 * The malloc functions perform more error checking and are stricter when
292 it comes to reacting on errors. The default action is to terminate
293 the process after showing an error message. Implemented by Ulrich Drepper.
295 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
296 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
298 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
299 namespaces using the new function dlmopen(). This feature is of course,
300 like most other dynamic loading functionality, not available in statically
301 linked applications. Implemented by Ulrich Drepper.
303 * Low-overhead boundary checking variants of string and some stdio functions
304 were added. These are to be used in conjunction with a gcc patch by
305 Jakub Jelinek which adds calls to these functions if possible.
306 Implemented by Jakub Jelinek and Ulrich Drepper.
308 * Old code for several operating systems and machine architectures that
309 have not been in working condition in a long time have been removed from
310 the main source tree maintained by the GNU C Library's maintainers.
311 These files are now reside in the separate `ports' source module
312 that is usable as an add-on when building the library.
313 \f
314 Version 2.3.3
316 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
317 interrogate the dynamic linker, compatible with the Solaris interface.
319 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
320 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
322 * getifaddrs now uses the netlink interface on Linux to get its information.
323 Implemented by Thorsten Kukuk.
325 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
326 Implemented by Ulrich Drepper.
328 * support for non-executable stacks on x86 has been added. Changes mostly
329 by Roland McGrath.
331 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
332 and Ulrich Drepper.
334 * getaddrinfo now performs destination address selection according to
335 RFC 3484.
336 \f
337 Version 2.3.2
339 * Thread-safe interfaces for many functions that access locale data
340 were added in version 2.3, but these features were omitted from NEWS.
341 Many functions have variants with an `_l' suffix that take a `locale_t'
342 object as a parameter rather than consulting the current locale.
343 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
344 create and maintain `locale_t' objects. Additionally, the new function
345 `uselocale' sets "the current locale" (as used by functions not so
346 parameterized) set for an individual thread. These features were added
347 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
349 * The functions getresuid, getresgid, setresuid, and setresgid, which
350 have long been available on Linux, are now declared in <unistd.h>
351 and are now also available on the Hurd.
353 * ELF thread-local storage support (TLS) now works on x86-64.
355 * The new dynamic string token $LIB is expanded in shared library names.
356 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
358 * Aldy Hernandez contributed complete software floating point support for
359 PowerPC machines with no FPU.
361 * fexecve is implemented on Linux.
363 * The `btowc' function should work at least twice as fast due to
364 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
366 * With approriate thread add-ons cancelable functions are now implemented
367 in libc.so as well. No need to call the function in libpthread. This
368 change allowed to finally disable the incorrect and expensive handling
369 of weak definition in ld.so.
371 * Yet more PLT entries in libc.so have been removed. We finally arrived
372 at the bare minimum. Startup times improved appropriately.
374 * Support for the new Linux/x86 system call interface was added. The
375 AT_SYSINFO auxiliary vector entry is recognized and handled.
376 \f
377 Version 2.3
379 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
380 charsets.
382 * iconv (the program and the interface) now accepts empty names (excluding
383 options like //TRANSLIT) to mean "use charset of current locale".
385 * localedef can now transliterate characters in strings which are not in
386 the provided charmap. The information from the input locale is used.
388 * Prelinking support was added for ELF targets. This requires additional
389 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
391 * Read-only stdio streams now use mmap to speed up operation by eliminating
392 copying and buffer underflows. To use add 'm' to the mode string of
393 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
395 * The malloc functions were completely rewritten by Wolfram Gloger based
396 on Doug Lea's malloc-2.7.0.c.
398 * Isamu Hasegawa contributed a completely new and POSIX-conformant
399 implementation of regex.
401 * Bruno Haible upgraded the iconv and locale implementation to support
402 Unicode 3.2.
404 * Contents of the LC_* and LANG environment variables in the CEN style are
405 not recognized anymore. It never was used. Change by Ulrich Drepper.
407 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
408 thread-local storage (TLS) ABI on some platforms.
409 Changes by Ulrich Drepper. SH support by Kaz Kojima.
411 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
412 EUC-JISX0213, and TSCII.
414 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
415 BSD-compatible interface for getting all network interface addresses.
416 Implementation for IPv4 by Roland McGrath.
418 * Loading of locale data is faster due to the introduction of a locale
419 archive. Implemented by Roland McGrath and Ulrich Drepper.
421 * Startup times are significantly reduced by not using exported functions
422 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
423 and Ulrich Drepper.
425 * Steven Munroe contributed a port to PowerPC64/Linux.
426 \f
427 Version 2.2.6
429 * The Hurd now uses the GNU libio implementation of stdio rather than the
430 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
432 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
433 with the same behavior as the Linux system call of the same name.
434 \f
435 Version 2.2.5
437 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
438 128-bit long double format.
440 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
441 IBM1161, and IBM1162 charsets.
443 * Andreas Jaeger contributed a port to x86-64/Linux.
445 * Peter Bruin contributed a port to PowerPC/Hurd.
447 * libc functions using I/O streams now can handle wide-oriented streams
448 as well.
450 * optimizations in the dynamic linker. Binaries created by recent binutils
451 versions start up quicker due to reduced time spent on relocations.
453 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
454 \f
455 Version 2.2.4
457 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
458 asinh, atanh, j0 for the 128-bit long double format.
460 * Bruno Haible updated all the code handling Unicode in some form to
461 support Unicode 3.1.
463 * Speed of regex for single-byte locales is back to previous levels.
464 Patch by Isamu Hasegawa.
466 * Alpha, SPARC, and IA-64 now also using floating stacks.
468 * Startup time of internationalized applications greatly improved through
469 iconv cache. Use iconvconfig to generate the cache file.
470 Contributed by Ulrich Drepper.
472 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
473 severe performance problems. Patch by David Mosberger.
475 * The Hurd port got a lot more functionality like AIO, various stdio
476 extensions, etc. Mainly done by Roland McGrath.
478 * mtrace can now lookup symbols in shared libraries.
479 \f
480 Version 2.2.3
482 * Intel's IA-64 math library is largely integrated. It provides fast and
483 accurate implementatations for most basic and standard math functions
484 in float, double, and long double format.
486 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
487 and asin for the 96-bit long double format and asin, log, tan for the
488 128-bit long double format.
490 * The beginning of a last-bit accurate math library by IBM Haifa were added.
491 The basic double functions exist today. Contributed by Abraham Ziv
492 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
493 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
495 * An asynchronous name lookup library was added. The interface is designed
496 after POSIX AIO. The proposal was circulated beforehand to get comments.
497 No negative ones came in. Implemented by Ulrich Drepper.
499 * Port to S390/64bit contributed by Martin Schwidefsky
500 <schwidefsky@de.ibm.com>.
502 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
503 of functions for Linux/IA-64.
505 * The RPC code is now thread safe. Threads can now use the same service
506 of different services at the same time. Patch by Eric Norum
507 <eric.norum@usask.ca> with some help by Ulrich Drepper.
509 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
510 family of functions for Linux/S390.
512 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
513 of functions for Linux/x86.
515 * Port to Linux/CRIS contributed by Axis Communications.
516 \f
517 Version 2.2.2
519 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
520 we can now check for namespace violations and missing declarations. The
521 result is that almost all headers are now Unix-compliant (as defined in
522 the upcoming XPG6). The negative side is that some programs might need
523 corrections, too, if they depend on the incorrect form of the headers in
524 previous versions which defined too many symbols and included too many
525 other headers.
527 * regex now handles multibyte character sets correctly.
528 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
530 * iconv (the program) does now conform to the upcoming XPG6 and handles
531 charmaps. Instead of the charset names the path of charmaps can be
532 provided and the conversion happens based on this data.
533 Contributed by Ulrich Drepper.
535 * The locale program now provides detailed information about the installed
536 locales. While
538 locale -a
540 only lists the names of the supported locales
542 locale -a --verbose
544 provides details such as country, language, and codeset name.
545 Contributed by Ulrich Drepper.
546 \f
547 Version 2.2.1
549 * The gencat program now parses the input file according to the charset
550 selected by the LC_CTYPE category. This is important for stateful
551 character sets. To make generating catalogs easier there is a way
552 to overwrite the charset selected by the locale: before the first
553 message or $ quote line the catalog can contain a line like
555 $ codeset=ISO-8859-2
557 to select the charset (ISO-8859-2 in this case).
559 Implemented by Shinya Hanataka and Ulrich Drepper.
561 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
562 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
563 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
565 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
566 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
568 * The LANGUAGE environment variable is now ignored unless the locale is
569 changed from the default "C" locale.
571 * The usual bug fixes.
572 \f
573 Version 2.2
575 * Greg McGary added runtime support for bounds checking using gcc's
576 new -fbounded-pointers option. ix86 target is complete. PowerPC
577 is in progress.
579 * Thorsten Kukuk added secure mode support to nscd.
581 * The Berkeley db libraries have been removed.
583 Related, the nss_db module is now in a separate package since it
584 obviously requires a database library being available.
586 * Wide character I/O streams implemented by Ulrich Drepper.
588 * Functions from the extended socket API added by Ulrich Drepper.
590 * Functions feenableexcept and fedisableexcept to control the
591 behaviour of individual exceptions have been added by Andreas Jaeger.
593 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
595 * The resolver code has been updated from bind 8.2.3-T5B which supports
596 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
597 and Mark Kettenis.
599 This change could in some situations effect backward compatibility. Since
600 now `_res' is a thread-local instead of a global variable, modifying it
601 in one thread does not have any effect in other threads.
603 The resolver library was also extended to allow IPv6 as the transport
604 protocol for the requests. This work was done by Stig Venaas.
606 * Compatibility code for K&R C compilers has been removed from the
607 header files. A ISO C compiler is needed to use the library
608 (conforming to either C89 or C99 standard).
610 * Complete rewrite of the localedef program to support multibyte character
611 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
612 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
613 Implemented by Ulrich Drepper.
615 Bruno Haible significantly improved the generation and use of the data
616 structures for the wide character tables.
618 * Plural handling in gettext implemented by Ulrich Drepper.
620 * The utmp daemon has been removed.
622 * The port to MIPS-Linux has been finished by Andreas Jaeger.
624 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
625 and Yutaka Niibe.
627 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
629 * POSIX barriers implemented by Kaz Kylheku.
631 * POSIX spawn function family implemented by Ulrich Drepper.
633 * POSIX spinlocks are now available.
635 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
637 * the configure option --enable-kernel=X.Y.Z allows to strip out
638 compatibility for kernel versions before X.Y.Z. This is currently only
639 implemented for Linux.
641 * the sockaddr_in6 structure changed. The IPv6 working group added a new
642 field sin6_scope_id. This means that all programs using IPv6 should be
643 recompiled. Don't expect binary compatibility with previous glibc
644 versions.
646 * various conversion modules for IBM character sets contributed by
647 Masahide Washizawa.
649 * IA-64 port by Jes Sorensen and HJ Lu.
651 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
652 Compiling the GNU C Library for Linux/ia64
653 ******************************************
655 Please refer to the file INSTALL in the same directory as you found
656 this file for general information about configuring and compiling
657 glibc.
659 For general inquiries about glibc under Linux/ia64 please use the
660 following mailing list linux-ia64@linuxia64.org or one of the relevant
661 glibc mailing lists.
663 Recommended Tools for Compilation
664 =================================
666 In order for glibc-2.2 to build correctly on the ia64 you need at
667 least the following versions of the GNU tools (the :
669 * The Cygnus toolchain snapshot for the ia64 as of August 4
670 including the provided set of patches. It is however recommend
671 you use the October 24 toolchain snapshot or a more recent version.
673 OR alternatively you can try the following (the Cygnus toolchain is
674 the recommended solution):
676 * GCC and binutils, GAS and GNU LD out of CVS from
677 sources.redhat.com as of August 28, 2000 or later. The CVS tree
678 may require special patches to work properly on the ia64.
680 Configuring and compiling GNU Libc for Linux/ia64
681 =================================================
683 The library requires Linux kernel version 2.4.0-test4-000728 or
684 later to funtion properly. Besides that it support for debug libraries
685 is currently untested. Hence the following options
686 are required for configuring the library:
688 --disable-debug --enable-kernel=2.4.0
690 It is also important that you make sure the library picks up the
691 appropriate kernel header files, if you do not have recent enough
692 kernel headers in /usr/src/linux/include, you should use the
693 --with-headers=<path> option to specify the location.
695 As an example I personally use the following options to configure
696 the library:
698 --disable-debug
699 --disable-cvs
700 --enable-kernel=2.4.0
701 --host=ia64-linux
702 --enable-add-ons=yes
703 --prefix=/usr
704 --with-headers=/home/jes/linux/include
707 Good luck
709 Jes Sorensen <jes@linuxcare.com>,
710 November 14th, 2000
711 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
712 \f
713 Version 2.1.3
715 * bug fixes
717 \f
718 Version 2.1.2
720 * bug fixes
722 \f
723 Version 2.1.1
725 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
727 * New xdr functions are added; some rpc functions are now 64bit clean.
729 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
731 * Fixed known incompatibilities with glibc 2.0.
733 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
735 * Optimized a number of functions (especially the ELF dynamic loader).
737 * Update timezone data files.
739 * lots of charmaps corrections
741 * some new locale definitions and charmaps
743 \f
744 Version 2.1
746 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
747 conform to POSIX member type requirements. Symbol versions have been
748 adjusted as needed within the library, and for direct use by applications,
749 but there is potential for problems if third-party libraries use
750 struct timeval as part of their interface. This does not present
751 a problem for X and other "essential" system libraries.
753 * An additional locale model to support C++ Standard Library locale
754 model and probably more was implemented by Ulrich Drepper.
756 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
757 symbol level.
759 * Miles Bader provided the `argp' function family to support hierachical
760 command line argument parsing, layered on top of getopt.
762 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
764 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
765 numbers.
767 * scanf recognizes the %a and %A format for scanning floating point numbers.
769 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
770 information and interfaces for the available integer types.
772 * about 130 new math functions were added to implement the ISO C9x math
773 library.
775 * the new header <complex.h> contains definitions of the complex math
776 functions from ISO C 9X.
778 * the new header <tgmath.h> defines generic macros to use complex or
779 real valued functions.
781 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
783 * Andreas Jaeger provided a test suite for the math library.
785 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
787 * Ulrich Drepper added character set conversion functions (iconv).
789 * Optimized string functions have been added.
791 * The localedata addon is now part of glibc.
793 * An implementation of profiling shared libraries was added by Ulrich Drepper.
795 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
796 daemon for NSS (nscd).
798 Missing a better place here are some numbers on improvements. Under
799 Linux 2.1.125 un-tar-ing the kernel sources takes
801 user system wall
803 using local files 12.19s 6.88s 22.91s
805 using NIS 13.92s 8.91s 26.34s
807 using NIS & nscd 10.37s 7.34s 25.30s
809 using NIS+ 27.57s 30.37s 640.46s
811 using NIS+ & nscd 10.25s 7.83s 26.51s
813 using NIS & old nscd [1] 13.83s 8.32s 29.60s
815 Keep in mind that non-namelookup related operations dominate above times.
816 It was just a common complain that using NIS+ unpacking the kernel is
817 horribly slow.
819 [1] The old nscd implementation is not available anymore since it was
820 distributed with glibc up to version 2.0.98 and thus is now replaced.
822 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
824 * Mark Kettenis provided a Hesiod NSS module.
826 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
827 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
829 * rcmd can now handle netgroups (Dick Streefland).
831 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
832 Bambrough.
834 * Support for the IPv6 protocol has been added to the socket API, as per the
835 latest draft standards.
837 * Support for Linux 2.2 has been added.
839 * Interface changes relative to the latest 2.0.x release:
840 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
841 addseverity NEW: Unix98
842 alphasort64 NEW: LFS
843 argp_err_exit_status NEW: argp, GNU ext
844 argp_error NEW: argp, GNU ext
845 argp_failure NEW: argp, GNU ext
846 argp_help NEW: argp, GNU ext
847 argp_parse NEW: argp, GNU ext
848 argp_program_bug_address NEW: argp, GNU ext
849 argp_program_version NEW: argp, GNU ext
850 argp_program_version_hook NEW: argp, GNU ext
851 argp_state_help NEW: argp, GNU ext
852 argp_usage NEW: argp, GNU ext
853 authdes_create NEW: Secure RPC
854 authdes_getucred NEW: Secure RPC
855 authdes_pk_create NEW: Secure RPC
856 backtrace NEW: GNU ext.
857 backtrace_symbols NEW: GNU ext.
858 backtrace_symbols_fd NEW: GNU ext.
859 cacos NEW: ISO C 9x
860 cacosf NEW: ISO C 9x
861 cacosh NEW: ISO C 9x
862 cacoshf NEW: ISO C 9x
863 cacoshl NEW: ISO C 9x
864 cacosl NEW: ISO C 9x
865 capget NEW: kernel
866 capset NEW: kernel
867 carg NEW: ISO C 9x
868 cargf NEW: ISO C 9x
869 cargl NEW: ISO C 9x
870 casin NEW: ISO C 9x
871 casinf NEW: ISO C 9x
872 casinh NEW: ISO C 9x
873 casinhf NEW: ISO C 9x
874 casinhl NEW: ISO C 9x
875 casinl NEW: ISO C 9x
876 catan NEW: ISO C 9x
877 catanf NEW: ISO C 9x
878 catanh NEW: ISO C 9x
879 catanhf NEW: ISO C 9x
880 catanhl NEW: ISO C 9x
881 catanl NEW: ISO C 9x
882 cbc_crypt NEW: Secure RPC
883 ccos NEW: ISO C 9x
884 ccosf NEW: ISO C 9x
885 ccosh NEW: ISO C 9x
886 ccoshf NEW: ISO C 9x
887 ccoshl NEW: ISO C 9x
888 ccosl NEW: ISO C 9x
889 cexp NEW: ISO C 9x
890 cexpf NEW: ISO C 9x
891 cexpl NEW: ISO C 9x
892 cimag NEW: ISO C 9x
893 cimagf NEW: ISO C 9x
894 cimagl NEW: ISO C 9x
895 clearerr_locked REMOVED
896 clntunix_create NEW: sunrpc ext
897 clog NEW: ISO C 9x
898 clog10 NEW: ISO C 9x
899 clog10f NEW: ISO C 9x
900 clog10l NEW: ISO C 9x
901 clogf NEW: ISO C 9x
902 clogl NEW: ISO C 9x
903 conj NEW: ISO C 9x
904 conjf NEW: ISO C 9x
905 conjl NEW: ISO C 9x
906 cpow NEW: ISO C 9x
907 cpowf NEW: ISO C 9x
908 cpowl NEW: ISO C 9x
909 cproj NEW: ISO C 9x
910 cprojf NEW: ISO C 9x
911 cprojl NEW: ISO C 9x
912 creal NEW: ISO C 9x
913 crealf NEW: ISO C 9x
914 creall NEW: ISO C 9x
915 creat64 NEW: LFS
916 csin NEW: ISO C 9x
917 csinf NEW: ISO C 9x
918 csinh NEW: ISO C 9x
919 csinhf NEW: ISO C 9x
920 csinhl NEW: ISO C 9x
921 csinl NEW: ISO C 9x
922 csqrt NEW: ISO C 9x
923 csqrtf NEW: ISO C 9x
924 csqrtl NEW: ISO C 9x
925 ctan NEW: ISO C 9x
926 ctanf NEW: ISO C 9x
927 ctanh NEW: ISO C 9x
928 ctanhf NEW: ISO C 9x
929 ctanhl NEW: ISO C 9x
930 ctanl NEW: ISO C 9x
931 des_setparity NEW: Secure RPC
932 ecb_crypt NEW: Secure RPC
933 endutxent NEW: Unix98
934 exp10 NEW: ISO C 9x
935 exp10f NEW: ISO C 9x
936 exp10l NEW: ISO C 9x
937 exp2 NEW: ISO C 9x
938 exp2f NEW: ISO C 9x
939 exp2l NEW: ISO C 9x
940 fattach NEW: STREAMS
941 fdetach NEW: STREAMS
942 fdim NEW: ISO C 9x
943 fdimf NEW: ISO C 9x
944 fdiml NEW: ISO C 9x
945 feclearexcept NEW: ISO C 9x
946 fegetenv NEW: ISO C 9x
947 fegetexceptflag NEW: ISO C 9x
948 fegetround NEW: ISO C 9x
949 feholdexcept NEW: ISO C 9x
950 feof_locked REMOVED
951 feraiseexcept NEW: ISO C 9x
952 ferror_locked REMOVED
953 fesetenv NEW: ISO C 9x
954 fesetexceptflag NEW: ISO C 9x
955 fesetround NEW: ISO C 9x
956 fetestexcept NEW: ISO C 9x
957 feupdateenv NEW: ISO C 9x
958 fflush_locked REMOVED
959 ffsl NEW: GNU ext.
960 ffsll NEW: GNU ext.
961 fgetpos64 NEW: LFS
962 fgets_unlocked NEW: GNU ext.
963 fileno_locked REMOVED
964 fma NEW: ISO C 9x
965 fmaf NEW: ISO C 9x
966 fmal NEW: ISO C 9x
967 fmax NEW: ISO C 9x
968 fmaxf NEW: ISO C 9x
969 fmaxl NEW: ISO C 9x
970 fmin NEW: ISO C 9x
971 fminf NEW: ISO C 9x
972 fminl NEW: ISO C 9x
973 fmtmsg NEW: Unix98
974 fopen64 NEW: LFS
975 fputc_locked REMOVED
976 fputs_unlocked NEW: GNU ext.
977 fread_unlocked NEW: GNU ext.
978 freopen64 NEW: LFS
979 fseeko NEW: Unix98
980 fsetpos64 NEW: LFS
981 fstatfs64 NEW: LFS
982 fstatvfs NEW: Unix98
983 fstatvfs64 NEW: LFS
984 ftello NEW: Unix98
985 ftello64 NEW: LFS
986 ftruncate64 NEW: LFS
987 ftw64 NEW: LFS
988 fwrite_unlocked NEW: GNU ext.
989 gai_strerror NEW: IPv6
990 gamma_r REMOVED
991 gammaf_r REMOVED
992 gammal_r REMOVED
993 getchar_locked REMOVED
994 getdate NEW: Unix98
995 getdate_err NEW: Unix98
996 getdate_r NEW: GNU ext.
997 getmsg NEW: STREAMS
998 getnameinfo NEW: IPv6
999 getnetname NEW: Secure RPC
1000 getpmsg NEW: STREAMS
1001 getpt NEW: Unix98 PTY
1002 getrlimit64 NEW: LFS
1003 getutxent NEW: Unix98
1004 getutxid NEW: Unix98
1005 getutxline NEW: Unix98
1006 glob64 NEW: GNU ext.
1007 globfree64 NEW: GNU ext.
1008 gnu_get_libc_release NEW: GNU ext.
1009 gnu_get_libc_version NEW: GNU ext.
1010 grantpt NEW: Unix98 PTY
1011 host2netname NEW: Secure RPC
1012 iconv NEW: iconv
1013 iconv_close NEW: iconv
1014 iconv_open NEW: iconv
1015 if_freenameindex NEW: IPv6
1016 if_indextoname NEW: IPv6
1017 if_nameindex NEW: IPv6
1018 if_nametoindex NEW: IPv6
1019 in6addr_any NEW: IPv6
1020 in6addr_loopback NEW: IPv6
1021 inet6_isipv4mapped NEW: IPv6
1022 isastream NEW: STREAMS
1023 iswblank NEW: GNU ext.
1024 key_decryptsession NEW: Secure RPC
1025 key_decryptsession_pk NEW: Secure RPC
1026 key_encryptsession NEW: Secure RPC
1027 key_encryptsession_pk NEW: Secure RPC
1028 key_gendes NEW: Secure RPC
1029 key_get_conv NEW: Secure RPC
1030 key_secretkey_is_set NEW: Secure RPC
1031 key_setnet NEW: Secure RPC
1032 key_setsecret NEW: Secure RPC
1033 llrint NEW: ISO C 9x
1034 llrintf NEW: ISO C 9x
1035 llrintl NEW: ISO C 9x
1036 llround NEW: ISO C 9x
1037 llroundf NEW: ISO C 9x
1038 llroundl NEW: ISO C 9x
1039 log2 NEW: ISO C 9x
1040 log2f NEW: ISO C 9x
1041 log2l NEW: ISO C 9x
1042 lrint NEW: ISO C 9x
1043 lrintf NEW: ISO C 9x
1044 lrintl NEW: ISO C 9x
1045 lround NEW: ISO C 9x
1046 lroundf NEW: ISO C 9x
1047 lroundl NEW: ISO C 9x
1048 lseek64 NEW: LFS
1049 makecontext NEW: Unix98
1050 mempcpy NEW: GNU ext.
1051 mmap64 NEW: LFS
1052 moncontrol REMOVED
1053 modify_ldt NEW: kernel
1054 nan NEW: ISO C 9x
1055 nanf NEW: ISO C 9x
1056 nanl NEW: ISO C 9x
1057 nearbyint NEW: ISO C 9x
1058 nearbyintf NEW: ISO C 9x
1059 nearbyintl NEW: ISO C 9x
1060 netname2host NEW: Secure RPC
1061 netname2user NEW: Secure RPC
1062 nexttoward NEW: ISO C 9x
1063 nexttowardf NEW: ISO C 9x
1064 nexttowardl NEW: ISO C 9x
1065 nftw NEW: Unix98
1066 nftw64 NEW: LFS
1067 open64 NEW: LFS
1068 passwd2des NEW: Secure RPC
1069 pow10 NEW: GNU ext.
1070 pow10f NEW: GNU ext.
1071 pow10l NEW: GNU ext.
1072 pread NEW: Unix98
1073 pread64 NEW: LFS
1074 printf_size NEW: GNU ext.
1075 printf_size_info NEW: GNU ext.
1076 profil_counter REMOVED
1077 pthread_mutexattr_getkind_np REPLACED
1078 pthread_mutexattr_setkind_np REPLACED
1079 ptsname NEW: Unix98 PTY
1080 ptsname_r NEW: Unix98 PTY
1081 putc_locked REMOVED
1082 putchar_locked REMOVED
1083 putgrent NEW: GNU ext.
1084 putmsg NEW: STREAMS
1085 putpmsg NEW: STREAMS
1086 pututxline NEW: Unix98
1087 pwrite NEW: Unix98
1088 pwrite64 NEW: LFS
1089 readdir64 NEW: LFS
1090 readdir64_r NEW: LFS
1091 remquo NEW: ISO C 9x
1092 remquof NEW: ISO C 9x
1093 remquol NEW: ISO C 9x
1094 round NEW: ISO C 9x
1095 roundf NEW: ISO C 9x
1096 roundl NEW: ISO C 9x
1097 rtime NEW: GNU ext.
1098 scalbln NEW: ISO C 9x
1099 scalblnf NEW: ISO C 9x
1100 scalblnl NEW: ISO C 9x
1101 scandir64 NEW: LFS
1102 sendfile NEW: kernel
1103 setcontext NEW: Unix98
1104 setrlimit64 NEW: LFS
1105 setutxent NEW: Unix98
1106 sighold NEW: Unix98
1107 sigignore NEW: Unix98
1108 sigqueue NEW: POSIX.1b
1109 sigrelse NEW: Unix98
1110 sigset NEW: POSIX.1b
1111 sigtimedwait NEW: POSIX.1b
1112 sigwaitinfo NEW: POSIX.1b
1113 sincos NEW: GNU ext.
1114 sincosf NEW: GNU ext.
1115 sincosl NEW: GNU ext.
1116 statfs64 NEW: LFS
1117 statvfs NEW: Unix98
1118 statvfs64 NEW: LFS
1119 strcasestr NEW: GNU ext.
1120 strtoimax NEW: ISO C 9x
1121 strtoumax NEW: ISO C 9x
1122 strverscmp NEW: GNU ext.
1123 svcauthdes_stats NEW: Secure RPC
1124 svcunix_create NEW: sunrpc etx
1125 svcunixfd_create NEW: sunrpc ext
1126 swapcontext NEW: Unix98
1127 tcgetsid NEW: Unix98 PTY
1128 tdestroy NEW: GNU ext.
1129 tgamma NEW: ISO C 9x
1130 tgammaf NEW: ISO C 9x
1131 tgammal NEW: ISO C 9x
1132 tmpfile64 NEW: LFS
1133 trunc NEW: ISO C 9x
1134 truncate64 NEW: LFS
1135 truncf NEW: ISO C 9x
1136 truncl NEW: ISO C 9x
1137 umount2 NEW: kernel
1138 unlockpt NEW: Unix98 PTY
1139 updwtmpx NEW: Unix98
1140 user2netname NEW: Secure RPC
1141 utmpxname NEW: Unix98
1142 versionsort NEW: GNU ext.
1143 versionsort64 NEW: GNU ext.
1144 waitid NEW: Unix98
1145 wcscasecmp NEW: GNU ext.
1146 wcsncasecmp NEW: GNU ext.
1147 wcsnlen NEW: GNU ext.
1148 wcstoimax NEW: ISO C 9x
1149 wcstoll NEW: ISO C 9x
1150 wcstoull NEW: ISO C 9x
1151 wcstoumax NEW: ISO C 9x
1152 wcswcs NEW: Unix98
1153 wordexp NEW: POSIX.2
1154 wordfree NEW: POSIX.2
1155 write_profiling REMOVED
1156 xdecrypt NEW: Secure RPC
1157 xdr_authdes_cred NEW: Secure RPC
1158 xdr_authdes_verf NEW: Secure RPC
1159 xdr_cryptkeyarg NEW: Secure RPC
1160 xdr_cryptkeyarg2 NEW: Secure RPC
1161 xdr_cryptkeyres NEW: Secure RPC
1162 xdr_getcredres NEW: Secure RPC
1163 xdr_key_netstarg NEW: Secure RPC
1164 xdr_key_netstres NEW: Secure RPC
1165 xdr_keybuf NEW: Secure RPC
1166 xdr_keystatus NEW: Secure RPC
1167 xdr_netnamestr NEW: Secure RPC
1168 xdr_sizeof NEW: Secure RPC
1169 xdr_unixcred NEW: sunrpc ext
1170 xencrypt NEW: Secure RPC
1171 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1172 \f
1173 Version 2.0.6
1175 * more bug fixes
1177 \f
1178 Version 2.0.5
1180 * more bug fixes
1182 * inet_ntoa is thread-safe
1184 * updwtmp is moved from libutil to libc
1186 * rewrite of cbrt function
1188 * update of timezone data
1189 \f
1190 Version 2.0.4
1192 * more bug fixes
1193 \f
1194 Version 2.0.3
1196 * more bug fixes
1197 \f
1198 Version 2.0.2
1200 * more bug fixes
1202 * add atoll function
1204 * fix complex problems in Berkeley DB code
1206 * fix math functions
1207 \f
1208 Version 2.0.1
1210 * fixed lots of header problems (especially Linux/GNU specific)
1212 * dynamic loader preserves all registers
1214 * Roland McGrath provided support for handling of auxiliary objects in
1215 the ELF dynamic loader.
1217 * support for parallel builds is improved
1218 \f
1219 Version 2.0
1221 * GNU extensions are no longer declared by default. To enable them you
1222 must define the macro `_GNU_SOURCE' in your program or compile with
1223 `-D_GNU_SOURCE'.
1225 * The library has changed from using GNU ld symbol aliases to using weak
1226 symbols where available. The ELF object file format supports weak
1227 symbols; GNU ld also supports weak symbols in the a.out format. (There
1228 is also now support for other GNU ld extensions in ELF. Use the
1229 `--with-elf' option to configure to indicate you have ELF, and
1230 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1231 of many files which contained only symbol aliases, reducing the size of
1232 the source and the compiled library; many other files were renamed to
1233 less cryptic names previously occupied by the symbol alias files.
1234 There is a new header file <elf.h> for programs which operate on
1235 files in the ELF format.
1237 * Converted to Autoconf version 2, so `configure' has more options.
1238 Run `configure --help' to see the details.
1240 * The library can now be configured to build profiling, highly-optimized
1241 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1242 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1243 `configure' enable building these extra libraries. The shared library is
1244 built by default when using both ELF and GNU ld. When shared libraries
1245 are enabled, the new library `-ldl' is available for arbitrary run-time
1246 loading of shared objects; its interface is defined in <dlfcn.h>. The
1247 new header file <link.h> gives access to the internals of the run-time
1248 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1249 application of same name on other systems and it provides information
1250 about dynamically linked binaries.
1252 * The C library now provides the run-time support code for profiling
1253 executables compiled with `-pg'. Programs can control the profiling code
1254 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1255 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1256 the support for this file format was contributed by David Mosberger-Tang.
1258 * The math code has been replaced with a math library based on fdlibm from
1259 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1260 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1261 functions. The math functions now reside in a separate library, so
1262 programs using them will need to use `-lm' their linking commands.
1264 * John C. Bowman contributed optimized ix87 assembler inline functions.
1266 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1267 mechanism similar to that found in Solaris 2. This is now used for the
1268 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1269 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1270 file controls what services are used for each individual database. This
1271 works by loading shared libraries with names specified in `nsswitch.conf',
1272 so service modules can be changed or added at any time without even
1273 relinking any program. Currently there are the file, db, and NIS based
1274 NSS services available.
1276 * The new functions `strtoq' and `strtouq' parse integer values from
1277 strings, like `strtol' and `strtoul', but they return `long long int' and
1278 `unsigned long long int' values, respectively (64-bit quantities).
1280 * The new functions `strtof' and `strtold' parse floating-point values from
1281 strings, like `strtod', but they return `float' and `long double' values,
1282 respectively (on some machines `double' and `long double' are the same).
1284 * Ulrich Drepper has contributed new implementations of the floating-point
1285 printing and reading code used in the `printf' family of functions and
1286 `strtod', `strtof', and `strtold'. These new functions are perfectly
1287 accurate, and much faster than the old ones.
1289 * The implementation of the POSIX locale model was completely rewritten by
1290 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1291 to compile the POSIX locale definition.
1293 * The former dummy implementations of the strcoll and strxfrm function are
1294 now replaced by fully functional code contributed by Ulrich Drepper. The
1295 collation information comes from the POSIX locale definitions.
1297 * The new header <langinfo.h> defines an interface for accessing
1298 various locale-dependent data (using the locale chosen with `setlocale').
1300 * Ulrich Drepper has contributed a new suite of functions for operation on
1301 wide-character and multibyte-character strings, in <wchar.h>;
1302 and classification and case conversion of wide characters, in <wctype.h>.
1303 These new functions are conforming to the ISO C, Amendement 1 specification.
1305 * There is now a second implementation of the standard I/O library available.
1306 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1307 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1309 * You can now use positional parameter specifications in format strings
1310 for the `printf' and `scanf' families of functions. For example,
1311 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1312 ``Number 6, Mr Jones''. This is mainly useful when providing different
1313 format strings for different languages, whose grammars may dictate
1314 different orderings of the values being printed. To support this
1315 feature, the interface for `register_printf_handler' has changed; see
1316 the header file <printf.h> for details.
1318 * The `printf' and `scanf' families of functions now understand a new
1319 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1320 to group numbers as indicated by the locale; for `scanf' and friends, this
1321 says to accept as valid only a number with all the proper grouping
1322 separators in the right places. In the default "C" locale, numbers are
1323 not grouped; but locales for specific countries will define the usual
1324 conventions (i.e. separate thousands with `,' in the US locale).
1326 * The pgrp functions have been regularized, slightly incompatibly but much
1327 less confusingly. The core functions are now `getpgid' and `setpgid',
1328 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1329 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1330 provided for compatibility. There is no longer an incompatible `getpgrp'
1331 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1333 * The new header file <fts.h> and suite of functions simplify programs that
1334 operate on directory trees. This code comes from 4.4 BSD.
1336 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1337 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1338 NSS scheme used in glibc.
1340 * There is a new malloc debugging hook `__memalign_hook'.
1342 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1343 `unsigned int' in <sys/types.h>. These are for compatibility only and
1344 their use is discouraged.
1346 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1347 done differently, so that it works even without GNU ld.
1349 * New function `euidaccess' checks allowed access to a file like `access',
1350 but using the effective IDs instead of the real IDs.
1352 * The time zone data files have been updated for the latest and greatest
1353 local time conventions of the countries of the world.
1355 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1356 see <dirent.h>.
1358 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1359 for formatting floating-point numbers. They are provided only for
1360 compatibility; new programs should use `sprintf' instead. There are
1361 also equivalent function for the `long double' floating-point type and
1362 all functions also exist in a reentrant form.
1364 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1365 functions for maintaining the login-record files (primarily of use to
1366 system programs such as `login'), and convenient functions for
1367 allocating and initializing a pseudo-terminal (pty) device.
1369 * Ulrich Drepper has contributed new support for System V style
1370 shared memory and IPC on systems that support it.
1372 * Ulrich Drepper has contributed several miscellaneous new functions found
1373 in System V: The `hsearch' family of functions provide an effective
1374 implementation of hash tables; `a64l' and `l64a' provide a very simple
1375 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1376 number generator.
1378 * Ulrich Drepper has contributed new reentrant counterparts for the
1379 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1381 * Ulrich Drepper has contributed new, highly-optimized versions of several
1382 string functions for the i486/Pentium family of processors.
1384 * Ulrich Drepper has updated the Linux-specific code, based largely
1385 on work done in Hongjiu Lu's version of GNU libc for Linux.
1386 The GNU library now supports Linux versions 2.0.10 and later,
1387 using the ELF object file format (i[3456]86-*-linux).
1389 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1391 * David Mosberger-Tang and Richard Henderson have ported the C library
1392 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1393 dynamic linking support for ELF/Alpha.
1395 * Richard Henderson contributed several Alpha optimized assembler function
1396 for arithmetic and string handling.
1398 * Ulrich Drepper has contributed a new set of message catalog functions to
1399 support multiple languages using the <libintl.h> interface, for use with
1400 his new package GNU gettext. Translation volunteers have contributed
1401 catalogs of the library's messages in Spanish, German, and Korean.
1403 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1404 program and the `catgets' function for reading the catalog files it
1405 creates. (The <libintl.h> interface is preferred; we include the
1406 <nl_types.h> interface using `catgets' only for source compatibility with
1407 programs already written to use it.)
1409 * New header file <values.h> gives SVID-compatible names for <limits.h>
1410 constants.
1412 * Various new macros, declarations, and small header files for compatibility
1413 with 4.4 BSD.
1415 * New function `group_member' is a convenient way to check if a process has
1416 a given effective group ID.
1418 * When using GCC 2.7 and later, the socket functions are now declared in a
1419 special way so that passing an argument of type `struct sockaddr_in *',
1420 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1421 `struct sockaddr *' type, does not generate a type-clash warning.
1423 * New function `error' declared in header file <error.h> is a convenient
1424 function for printing error messages and optionally exiting; this is the
1425 canonical function used in GNU programs. The new functions `err', `warn',
1426 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1427 doing the same thing.
1429 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1430 POSIX.2 `glob' function to do ~ and {...} expansion.
1432 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1433 `clearenv' which is used in POSIX.9 is also available.
1435 * New function `getsid' returns session ID number on systems that support it.
1437 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1438 files <db.h> and <mpool.h> provide a rich set of functions for several
1439 types of simple databases stored in memory and in files, and <ndbm.h> is
1440 an old `ndbm'-compatible interface using the `db' functions. Link with
1441 `-ldb' to get these functions.
1443 * New macro `strdupa' copies a string like `strdup', but uses local stack
1444 space from `alloca' instead of dynamic heap space from `malloc'.
1446 * New function `strnlen' is like `strlen' but searches only a given maximum
1447 number of characters for the null terminator. `stpncpy', `strndup' and
1448 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1449 function.
1451 * New function `statfs' in header <sys/statfs.h>.
1453 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1454 provide convenient functions for operating on blocks of null-terminated
1455 strings.
1457 * A new suite of functions in <utmp.h> handle all the details of reading
1458 and writing the utmp file.
1460 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1461 Thorsten Kukuk.
1463 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1464 completely POSIX compliant and also implemented the extended functionality
1465 to handle alternate digit representation and alternate era date formats.
1467 * Ulrich Drepper provided an implementation of the `strptime' function
1468 defined in XPG4.2 which transforms a string into a `struct tm' value.
1470 * Paul Eggert provided the tzselect shell script as part of the timezone
1471 code. The shell script makes it easy to select the correct timezone
1472 specification.
1474 * The implementation of the malloc family of functions is completely replaced
1475 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1476 The implementation uses the mmap function (if available) and it is
1477 optimized for the use in multi threaded programs.
1479 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1480 functions. This new functionality is usable by specifying a special
1481 salt string and it is compatible with implementation on *BSD systems.
1483 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1484 `getsubopt' to handle second level command line options, `bsd_signal'
1485 to access BSD style `signal' functionality, the obsolete `regexp' style
1486 expression matcher.
1488 * the `lchown' function is available on system which support this
1489 functionality.
1491 * The implementation of the shadow password handling function was contributed
1492 by Ulrich Drepper.
1494 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1496 * POSIX.1g support was added. The <sys/select.h> header is available,
1497 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1498 implementation of `getaddrinfo'.
1499 \f
1500 Version 1.09
1502 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1504 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1505 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1507 * The new function `daemon' from 4.4 BSD is useful for server programs that
1508 want to put themselves in the background.
1510 * Joel Sherrill has contributed support for several standalone boards that
1511 run without an operating system.
1513 * `printf', `scanf' and friends now accept a `q' type modifier for long
1514 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1516 * All of the code taken from BSD (notably most of the math and networking
1517 routines) has been updated from the BSD 4.4-Lite release.
1519 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1521 * The new functions `getdomainname' and `setdomainname' fetch or change the
1522 YP/NIS domain name. These are system calls which exist on systems which
1523 have YP (aka NIS).
1525 * The time zone data files have been updated for the latest international
1526 conventions.
1528 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1529 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1530 \f
1531 Version 1.08
1533 * The C library now includes support for Sun RPC, from Sun's free
1534 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1535 are included. (There is still no support for YP.)
1537 * Tom Quinn has contributed a port of the C library to SGI machines running
1538 Irix 4 (mips-sgi-irix4).
1540 * The new `lockf' function is a simplified interface to the locking
1541 facilities of `fcntl', included for compatibility.
1543 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1545 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1547 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1548 compatibility.
1550 * The error message printed by `assert' for a failed assertion now includes
1551 the name of the program (if using GNU ld) and the name of the calling
1552 function (with versions of GCC that support this).
1554 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1556 * The library now includes the <sys/mman.h> header file and memory
1557 management functions `mmap', `munmap', `mprotect', `msync', and
1558 `madvise', on systems that support those facilities.
1560 * The interface for `mcheck' has changed slightly: the function called to
1561 abort the program when an allocation inconsistency is detected now takes
1562 an argument that indicates the type of failure. The new function
1563 `mprobe' lets you request a consistency check for a particular block at
1564 any time (checks are normally done only when you call `free' or `realloc'
1565 on a block).
1567 * It is now possible to easily cross-compile the C library, building on one
1568 system a library to run on another machine and/or operating system. All
1569 you need to do is set the variable `HOST_CC' in `configparms' to the
1570 native compiler for programs to run on the machine you are building on (a
1571 few generator programs are used on Unix systems); set `CC' to the
1572 cross-compiler.
1574 * The new function `fexecve' (only implemented on the GNU system) executes
1575 a program file given a file descriptor already open on the file.
1576 \f
1577 Version 1.07
1579 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1580 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1582 * You can set the variable `libprefix' in `configparms' to specify a prefix
1583 to be prepended to installed library files; this makes it easy to install
1584 the GNU C library to be linked as `-lgnuc' or whatever.
1586 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1587 copies a limited number of characters from a string, and returns the
1588 address of the last character written.
1590 * You no longer need to check for whether the installed `stddef.h' is
1591 compatible with the GNU C library. configure now checks for you.
1593 * You can now define a per-stream `fileno' function to convert the
1594 stream's cookie into an integral file descriptor.
1596 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1597 allocates zero bytes of storage, and returns a unique pointer which
1598 you can pass to `realloc' or `free'. The behavior is undefined if
1599 you dereference this pointer.
1601 * The C library now runs on Sony NEWS m68k machines running either
1602 NewsOS 3 or NewsOS 4.
1604 * The new `syscall' function is a system-dependent primitive function
1605 for invoking system calls. It has the canonical behavior on Unix
1606 systems, including unreliable return values for some calls (such as
1607 `pipe', `fork' and `getppid').
1609 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1610 to `EAGAIN', which is the preferred name. On systems whose kernels
1611 use two distinct codes, the C library now translates EWOULDBLOCK to
1612 EAGAIN in every system call function.
1613 \f
1614 Version 1.06
1616 * The GNU C Library Reference Manual is now distributed with the library.
1617 `make dvi' will produce a DVI file of the printed manual.
1618 `make info' will produce Info files that you can read on line using C-h i
1619 in Emacs or the `info' program.
1620 Please send comments on the manual to bug-glibc-manual@gnu.org.
1622 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1624 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1626 * Jason Merrill has contributed a port to the Sequent Symmetry running
1627 Dynix version 3 (i386-sequent-dynix).
1629 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1630 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1632 * New function `memory_warnings' lets you arrange to get warnings when
1633 malloc is running out of memory to allocate, like Emacs gives you.
1635 * The C library now contains the relocating allocator used in Emacs 19 for
1636 its editing buffers. This allocator (ralloc) minimizes allocation
1637 overhead and fragmentation by moving allocated regions around whenever it
1638 needs to. You always refer to a ralloc'd region with a "handle" (a
1639 pointer to a pointer--an object of type `void **').
1641 * There is a new `printf' format: `%m' gives you the string corresponding
1642 to the error code in `errno'.
1644 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1645 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1646 pass, the `a' modifier says to fill in a `char **' you pass with a
1647 malloc'd string.
1649 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1650 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1651 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1653 * `mkstemp' is a traditional Unix function to atomically create and open a
1654 uniquely-named temporary file.
1655 \f
1656 Version 1.05
1658 * The standard location for the file that says what the local timezone is
1659 has changed again. It is now `/usr/local/etc/localtime' (or more
1660 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1662 * The distribution no longer contains any files with names longer than 14
1663 characters.
1665 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1666 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1668 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1669 \f
1670 Version 1.04
1672 * The configuration process has changed quite a bit. The `configure'
1673 script is now used just like the configuration scripts for other GNU
1674 packages. The `sysdeps' directory hierarchy is much rearranged.
1675 The file `INSTALL' explains the new scheme in detail.
1677 * The header files no longer need to be processed into ANSI C and
1678 traditional C versions. There is just one set of files to install, and
1679 it will work with ANSI or old C compilers (including `gcc -traditional').
1681 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1682 MIPS DECStation running Ultrix 4.
1684 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1685 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1686 made itself into a shared library.
1688 * Yet further improved support for the i386, running 4.3 BSD-like systems
1689 (such as Mach 3 with the Unix single-server), or System V.
1691 * New function `strncasecmp' to do case-insensitive string comparison
1692 with limited length.
1694 * New function `strsep' is a reentrant alternative to `strtok'.
1696 * New functions `scandir' and `alphasort' for searching directories.
1698 * New function `setenv' is a better interface to `putenv'.
1700 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1701 function for traversing a directory tree.
1703 * The GNU obstack package is now also part of the C library.
1704 The new function `open_obstack_stream' creates a stdio stream that
1705 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1706 formatted output directly to an obstack.
1708 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1709 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1711 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1713 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1714 things to your strings.
1716 * There are some new test programs: test-fseek, testmb, and testrand.
1718 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1719 These ports are not finished, but are a good starting place for really
1720 supporting those systems.
1722 * `/etc/localtime' is now the standard location for the file that says what
1723 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1724 This follows the general principle that `/etc' is the place for all local
1725 configuration files.
1727 * The C library header files now use `extern "C"' when used by the C++
1728 compiler, so the C library should now work with C++ code.
1730 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1731 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1732 in <strings.h>.)
1734 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1735 function which uses the `merge sort' algorithm, and is said to be
1736 significantly faster than the old GNU `qsort' function. Merge sort is
1737 now the standard `qsort' function. The new algorithm can require a lot
1738 of temporary storage; so, the old sorting function is called when the
1739 required storage is not available.
1741 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1742 provides the Unix `crypt' function, plus some other entry points.
1744 * The code and header files taken from 4.4 BSD have been updated with the
1745 latest files released from Berkeley.
1746 \f
1747 ----------------------------------------------------------------------
1748 Copyright information:
1750 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1751 Free Software Foundation, Inc.
1753 Permission is granted to anyone to make or distribute verbatim copies
1754 of this document as received, in any medium, provided that the
1755 copyright notice and this permission notice are preserved,
1756 thus giving the recipient permission to redistribute in turn.
1758 Permission is granted to distribute modified versions
1759 of this document, or of portions of it,
1760 under the above conditions, provided also that they
1761 carry prominent notices stating who last changed them.
1762 \f
1763 Local variables:
1764 version-control: never
1765 End: