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1 GNU C Library NEWS -- history of user-visible changes. 2009-4-8
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, and memchr for x86-64.
41 Implemented by Ulrich Drepper.
43 \f
44 Version 2.9
46 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
47 up at the same time. Implemented by Ulrich Drepper.
49 * TLS descriptors for LD and GD on x86 and x86-64.
50 Implemented by Alexandre Oliva.
52 * getaddrinfo now handles DCCP and UDPlite.
53 Implemented by Ulrich Drepper.
55 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
56 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
57 Implemented by Ulrich Drepper.
59 * New implementation of memmem, strstr, and strcasestr which is O(n).
60 Implemented by Eric Blake.
62 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
64 * Implement "e" option for popen to open file descriptor with the
65 close-on-exec flag set. Implemented by Ulrich Drepper.
67 * Implement "b" mode for fmemopen. In this mode writes writes don't
68 implicitly add a NUL byte and seeks from the end of the buffer really
69 use the buffer end, not the string length as the basis.
70 Implemented by Ulrich Drepper.
72 * Many functions, exported and internal, now atomically set the close-on-exec
73 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
75 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
76 Sinhala)
77 Implemented by Pravin Satpute.
79 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
80 \f
81 Version 2.8
83 * New locales: bo_CN, bo_IN, shs_CA.
85 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
87 * Sorting rules for some Indian languages (Devanagari and Gujarati).
88 Implemented by Pravin Satpute.
90 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
92 * nscd caches now all timeouts for DNS entries
93 Implemented by Ulrich Drepper.
95 * nscd is more efficient and wakes up less often.
96 Implemented by Ulrich Drepper.
98 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
99 vdprintf, and obstack_vprintf.
100 Implemented by Jakub Jelinek.
102 * Faster memset for x86-64.
103 Implemented by Harsha Jagasia and H.J. Lu.
105 * Faster memcpy on x86.
106 Implemented by Ulrich Drepper.
108 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
109 Implemented by Ulrich Drepper.
111 * Faster sqrt and sqrtf implemention for some PPC variants.
112 Implemented by Stephen Munroe.
113 \f
114 Version 2.7
116 * More checking functions: fread, fread_unlocked, open*, mq_open.
117 Implemented by Jakub Jelinek and Ulrich Drepper.
119 * Extend fortification to C++. Implemented by Jakub Jelinek.
121 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
122 by not recognizing 'a' as a modifier when those specs are requested.
123 Implemented by Jakub Jelinek.
125 * PPC optimizations to math and string functions.
126 Implemented by Steven Munroe.
128 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
129 options to be passed. Implemented by Ulrich Drepper.
131 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
133 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
134 Implemented by Ulrich Drepper.
136 * Handle private futexes in the NPTL implementation.
137 Implemented by Jakub Jelinek and Ulrich Drepper.
139 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
140 Implemented by Roland McGrath and Ulrich Drepper.
142 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
144 * SHA-256 and SHA-512 based password encryption.
145 Implemented by Ulrich Drepper.
147 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
148 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
149 yo_NG.
151 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
152 Implemented by Ulrich Drepper.
153 \f
154 Version 2.6
156 * New Linux interfaces: epoll_pwait, sched_getcpu.
158 * New generic interfaces: strerror_l.
160 * nscd can now cache the services database. Implemented by Ulrich Drepper.
162 \f
163 Version 2.5
165 * For Linux, the sorting of addresses returned by getaddrinfo now also
166 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
167 Implemented by Ulrich Drepper.
169 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
170 Implemented by Ulrich Drepper.
172 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
174 * New iconv module for MIK. Contributed by Alexander Shopov.
176 * For sites with broken group and/or passwd database, the auto-propagate
177 option of nscd can prevent creating ID lookup entries from the results
178 of a name lookup and vice versa. This usually is no problem but some
179 site might have problems with the default behavior.
180 Implemented by Ulrich Drepper.
182 * Iterating over entire database in NIS can be slow. With the
183 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
184 to trade time for memory. The entire database will be read at once.
185 Implemented by Ulrich Drepper.
187 * The interfaces introduced in RFC 3542 have been implemented by
188 Ulrich Drepper.
190 * Support for the new ELF hash table format was added by Ulrich Drepper.
192 * Support for priority inheritance mutexes added by Jakub Jelinek and
193 Ulrich Drepper.
195 * Support for priority protected mutexes added by Jakub Jelinek.
197 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
198 or_IN, csb_PL, fy_NL, sr_ME.
199 \f
200 Version 2.4
202 * More overflow detection functions.
204 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
205 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
207 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
208 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
209 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
210 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
211 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
212 by Masahide Washizawa.
214 * It is now possible to install audit libraries for the dynamic linker using
215 LD_AUDIT. Implemented by Ulrich Drepper.
217 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
218 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
219 For a libc and libpthread that works well on Linux 2.4 kernels, we
220 recommend using the stable 2.3 branch.
222 * The new function open_wmemstream acts like open_memstream,
223 but uses a wchar_t wide character buffer.
225 * The new function ppoll is an improved version of poll, similar to pselect.
227 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
228 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
229 renameat, unlinkat, linkat, symlinkat, readlinkat.
231 * New Linux kernel system calls: unshare,
232 inotify_init, inotify_add_watch, inotify_rm_watch.
234 * The euidaccess function is now also known by the alias eaccess,
235 for compatibility with some other systems.
237 * Timezone data updated to 2006b version.
238 \f
239 Version 2.3.6
241 * The following bugs are resolved with this release:
243 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
244 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
245 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
246 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
247 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
248 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
250 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
252 * As of this release, GCC 4 can be used to compile the C Library.
254 * Timezone data updated to 2005m version.
255 \f
256 Version 2.3.5
258 * The following bugs are resolved with this release:
260 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
261 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
262 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
263 777, 787, 821, 822, 823, 825
265 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
266 \f
267 Version 2.3.4
269 * Support for RFC 3678. Real implementations exist only for Linux so far.
270 Implemented by Ulrich Drepper.
272 * nscd can now cache entries persistently. Expiring entries are reloaded.
273 For speedups the cache can be shared in memory with client processes.
274 Implemented by Ulrich Drepper.
276 * nscd can now perform SELinux checks.
277 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
279 * getaddrinfo queries are now cached. Canonical name lookup is performed
280 efficiently.
281 Implemented by Ulrich Drepper.
283 * The nothrow function attribute is used when headers are used by gcc when
284 compiling C code. This can avoid significant amounts of exception
285 handling data.
287 * The malloc functions perform more error checking and are stricter when
288 it comes to reacting on errors. The default action is to terminate
289 the process after showing an error message. Implemented by Ulrich Drepper.
291 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
292 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
294 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
295 namespaces using the new function dlmopen(). This feature is of course,
296 like most other dynamic loading functionality, not available in statically
297 linked applications. Implemented by Ulrich Drepper.
299 * Low-overhead boundary checking variants of string and some stdio functions
300 were added. These are to be used in conjunction with a gcc patch by
301 Jakub Jelinek which adds calls to these functions if possible.
302 Implemented by Jakub Jelinek and Ulrich Drepper.
304 * Old code for several operating systems and machine architectures that
305 have not been in working condition in a long time have been removed from
306 the main source tree maintained by the GNU C Library's maintainers.
307 These files are now reside in the separate `ports' source module
308 that is usable as an add-on when building the library.
309 \f
310 Version 2.3.3
312 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
313 interrogate the dynamic linker, compatible with the Solaris interface.
315 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
316 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
318 * getifaddrs now uses the netlink interface on Linux to get its information.
319 Implemented by Thorsten Kukuk.
321 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
322 Implemented by Ulrich Drepper.
324 * support for non-executable stacks on x86 has been added. Changes mostly
325 by Roland McGrath.
327 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
328 and Ulrich Drepper.
330 * getaddrinfo now performs destination address selection according to
331 RFC 3484.
332 \f
333 Version 2.3.2
335 * Thread-safe interfaces for many functions that access locale data
336 were added in version 2.3, but these features were omitted from NEWS.
337 Many functions have variants with an `_l' suffix that take a `locale_t'
338 object as a parameter rather than consulting the current locale.
339 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
340 create and maintain `locale_t' objects. Additionally, the new function
341 `uselocale' sets "the current locale" (as used by functions not so
342 parameterized) set for an individual thread. These features were added
343 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
345 * The functions getresuid, getresgid, setresuid, and setresgid, which
346 have long been available on Linux, are now declared in <unistd.h>
347 and are now also available on the Hurd.
349 * ELF thread-local storage support (TLS) now works on x86-64.
351 * The new dynamic string token $LIB is expanded in shared library names.
352 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
354 * Aldy Hernandez contributed complete software floating point support for
355 PowerPC machines with no FPU.
357 * fexecve is implemented on Linux.
359 * The `btowc' function should work at least twice as fast due to
360 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
362 * With approriate thread add-ons cancelable functions are now implemented
363 in libc.so as well. No need to call the function in libpthread. This
364 change allowed to finally disable the incorrect and expensive handling
365 of weak definition in ld.so.
367 * Yet more PLT entries in libc.so have been removed. We finally arrived
368 at the bare minimum. Startup times improved appropriately.
370 * Support for the new Linux/x86 system call interface was added. The
371 AT_SYSINFO auxiliary vector entry is recognized and handled.
372 \f
373 Version 2.3
375 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
376 charsets.
378 * iconv (the program and the interface) now accepts empty names (excluding
379 options like //TRANSLIT) to mean "use charset of current locale".
381 * localedef can now transliterate characters in strings which are not in
382 the provided charmap. The information from the input locale is used.
384 * Prelinking support was added for ELF targets. This requires additional
385 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
387 * Read-only stdio streams now use mmap to speed up operation by eliminating
388 copying and buffer underflows. To use add 'm' to the mode string of
389 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
391 * The malloc functions were completely rewritten by Wolfram Gloger based
392 on Doug Lea's malloc-2.7.0.c.
394 * Isamu Hasegawa contributed a completely new and POSIX-conformant
395 implementation of regex.
397 * Bruno Haible upgraded the iconv and locale implementation to support
398 Unicode 3.2.
400 * Contents of the LC_* and LANG environment variables in the CEN style are
401 not recognized anymore. It never was used. Change by Ulrich Drepper.
403 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
404 thread-local storage (TLS) ABI on some platforms.
405 Changes by Ulrich Drepper. SH support by Kaz Kojima.
407 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
408 EUC-JISX0213, and TSCII.
410 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
411 BSD-compatible interface for getting all network interface addresses.
412 Implementation for IPv4 by Roland McGrath.
414 * Loading of locale data is faster due to the introduction of a locale
415 archive. Implemented by Roland McGrath and Ulrich Drepper.
417 * Startup times are significantly reduced by not using exported functions
418 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
419 and Ulrich Drepper.
421 * Steven Munroe contributed a port to PowerPC64/Linux.
422 \f
423 Version 2.2.6
425 * The Hurd now uses the GNU libio implementation of stdio rather than the
426 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
428 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
429 with the same behavior as the Linux system call of the same name.
430 \f
431 Version 2.2.5
433 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
434 128-bit long double format.
436 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
437 IBM1161, and IBM1162 charsets.
439 * Andreas Jaeger contributed a port to x86-64/Linux.
441 * Peter Bruin contributed a port to PowerPC/Hurd.
443 * libc functions using I/O streams now can handle wide-oriented streams
444 as well.
446 * optimizations in the dynamic linker. Binaries created by recent binutils
447 versions start up quicker due to reduced time spent on relocations.
449 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
450 \f
451 Version 2.2.4
453 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
454 asinh, atanh, j0 for the 128-bit long double format.
456 * Bruno Haible updated all the code handling Unicode in some form to
457 support Unicode 3.1.
459 * Speed of regex for single-byte locales is back to previous levels.
460 Patch by Isamu Hasegawa.
462 * Alpha, SPARC, and IA-64 now also using floating stacks.
464 * Startup time of internationalized applications greatly improved through
465 iconv cache. Use iconvconfig to generate the cache file.
466 Contributed by Ulrich Drepper.
468 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
469 severe performance problems. Patch by David Mosberger.
471 * The Hurd port got a lot more functionality like AIO, various stdio
472 extensions, etc. Mainly done by Roland McGrath.
474 * mtrace can now lookup symbols in shared libraries.
475 \f
476 Version 2.2.3
478 * Intel's IA-64 math library is largely integrated. It provides fast and
479 accurate implementatations for most basic and standard math functions
480 in float, double, and long double format.
482 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
483 and asin for the 96-bit long double format and asin, log, tan for the
484 128-bit long double format.
486 * The beginning of a last-bit accurate math library by IBM Haifa were added.
487 The basic double functions exist today. Contributed by Abraham Ziv
488 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
489 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
491 * An asynchronous name lookup library was added. The interface is designed
492 after POSIX AIO. The proposal was circulated beforehand to get comments.
493 No negative ones came in. Implemented by Ulrich Drepper.
495 * Port to S390/64bit contributed by Martin Schwidefsky
496 <schwidefsky@de.ibm.com>.
498 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
499 of functions for Linux/IA-64.
501 * The RPC code is now thread safe. Threads can now use the same service
502 of different services at the same time. Patch by Eric Norum
503 <eric.norum@usask.ca> with some help by Ulrich Drepper.
505 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
506 family of functions for Linux/S390.
508 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
509 of functions for Linux/x86.
511 * Port to Linux/CRIS contributed by Axis Communications.
512 \f
513 Version 2.2.2
515 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
516 we can now check for namespace violations and missing declarations. The
517 result is that almost all headers are now Unix-compliant (as defined in
518 the upcoming XPG6). The negative side is that some programs might need
519 corrections, too, if they depend on the incorrect form of the headers in
520 previous versions which defined too many symbols and included too many
521 other headers.
523 * regex now handles multibyte character sets correctly.
524 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
526 * iconv (the program) does now conform to the upcoming XPG6 and handles
527 charmaps. Instead of the charset names the path of charmaps can be
528 provided and the conversion happens based on this data.
529 Contributed by Ulrich Drepper.
531 * The locale program now provides detailed information about the installed
532 locales. While
534 locale -a
536 only lists the names of the supported locales
538 locale -a --verbose
540 provides details such as country, language, and codeset name.
541 Contributed by Ulrich Drepper.
542 \f
543 Version 2.2.1
545 * The gencat program now parses the input file according to the charset
546 selected by the LC_CTYPE category. This is important for stateful
547 character sets. To make generating catalogs easier there is a way
548 to overwrite the charset selected by the locale: before the first
549 message or $ quote line the catalog can contain a line like
551 $ codeset=ISO-8859-2
553 to select the charset (ISO-8859-2 in this case).
555 Implemented by Shinya Hanataka and Ulrich Drepper.
557 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
558 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
559 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
561 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
562 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
564 * The LANGUAGE environment variable is now ignored unless the locale is
565 changed from the default "C" locale.
567 * The usual bug fixes.
568 \f
569 Version 2.2
571 * Greg McGary added runtime support for bounds checking using gcc's
572 new -fbounded-pointers option. ix86 target is complete. PowerPC
573 is in progress.
575 * Thorsten Kukuk added secure mode support to nscd.
577 * The Berkeley db libraries have been removed.
579 Related, the nss_db module is now in a separate package since it
580 obviously requires a database library being available.
582 * Wide character I/O streams implemented by Ulrich Drepper.
584 * Functions from the extended socket API added by Ulrich Drepper.
586 * Functions feenableexcept and fedisableexcept to control the
587 behaviour of individual exceptions have been added by Andreas Jaeger.
589 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
591 * The resolver code has been updated from bind 8.2.3-T5B which supports
592 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
593 and Mark Kettenis.
595 This change could in some situations effect backward compatibility. Since
596 now `_res' is a thread-local instead of a global variable, modifying it
597 in one thread does not have any effect in other threads.
599 The resolver library was also extended to allow IPv6 as the transport
600 protocol for the requests. This work was done by Stig Venaas.
602 * Compatibility code for K&R C compilers has been removed from the
603 header files. A ISO C compiler is needed to use the library
604 (conforming to either C89 or C99 standard).
606 * Complete rewrite of the localedef program to support multibyte character
607 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
608 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
609 Implemented by Ulrich Drepper.
611 Bruno Haible significantly improved the generation and use of the data
612 structures for the wide character tables.
614 * Plural handling in gettext implemented by Ulrich Drepper.
616 * The utmp daemon has been removed.
618 * The port to MIPS-Linux has been finished by Andreas Jaeger.
620 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
621 and Yutaka Niibe.
623 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
625 * POSIX barriers implemented by Kaz Kylheku.
627 * POSIX spawn function family implemented by Ulrich Drepper.
629 * POSIX spinlocks are now available.
631 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
633 * the configure option --enable-kernel=X.Y.Z allows to strip out
634 compatibility for kernel versions before X.Y.Z. This is currently only
635 implemented for Linux.
637 * the sockaddr_in6 structure changed. The IPv6 working group added a new
638 field sin6_scope_id. This means that all programs using IPv6 should be
639 recompiled. Don't expect binary compatibility with previous glibc
640 versions.
642 * various conversion modules for IBM character sets contributed by
643 Masahide Washizawa.
645 * IA-64 port by Jes Sorensen and HJ Lu.
647 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
648 Compiling the GNU C Library for Linux/ia64
649 ******************************************
651 Please refer to the file INSTALL in the same directory as you found
652 this file for general information about configuring and compiling
653 glibc.
655 For general inquiries about glibc under Linux/ia64 please use the
656 following mailing list linux-ia64@linuxia64.org or one of the relevant
657 glibc mailing lists.
659 Recommended Tools for Compilation
660 =================================
662 In order for glibc-2.2 to build correctly on the ia64 you need at
663 least the following versions of the GNU tools (the :
665 * The Cygnus toolchain snapshot for the ia64 as of August 4
666 including the provided set of patches. It is however recommend
667 you use the October 24 toolchain snapshot or a more recent version.
669 OR alternatively you can try the following (the Cygnus toolchain is
670 the recommended solution):
672 * GCC and binutils, GAS and GNU LD out of CVS from
673 sources.redhat.com as of August 28, 2000 or later. The CVS tree
674 may require special patches to work properly on the ia64.
676 Configuring and compiling GNU Libc for Linux/ia64
677 =================================================
679 The library requires Linux kernel version 2.4.0-test4-000728 or
680 later to funtion properly. Besides that it support for debug libraries
681 is currently untested. Hence the following options
682 are required for configuring the library:
684 --disable-debug --enable-kernel=2.4.0
686 It is also important that you make sure the library picks up the
687 appropriate kernel header files, if you do not have recent enough
688 kernel headers in /usr/src/linux/include, you should use the
689 --with-headers=<path> option to specify the location.
691 As an example I personally use the following options to configure
692 the library:
694 --disable-debug
695 --disable-cvs
696 --enable-kernel=2.4.0
697 --host=ia64-linux
698 --enable-add-ons=yes
699 --prefix=/usr
700 --with-headers=/home/jes/linux/include
703 Good luck
705 Jes Sorensen <jes@linuxcare.com>,
706 November 14th, 2000
707 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
708 \f
709 Version 2.1.3
711 * bug fixes
713 \f
714 Version 2.1.2
716 * bug fixes
718 \f
719 Version 2.1.1
721 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
723 * New xdr functions are added; some rpc functions are now 64bit clean.
725 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
727 * Fixed known incompatibilities with glibc 2.0.
729 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
731 * Optimized a number of functions (especially the ELF dynamic loader).
733 * Update timezone data files.
735 * lots of charmaps corrections
737 * some new locale definitions and charmaps
739 \f
740 Version 2.1
742 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
743 conform to POSIX member type requirements. Symbol versions have been
744 adjusted as needed within the library, and for direct use by applications,
745 but there is potential for problems if third-party libraries use
746 struct timeval as part of their interface. This does not present
747 a problem for X and other "essential" system libraries.
749 * An additional locale model to support C++ Standard Library locale
750 model and probably more was implemented by Ulrich Drepper.
752 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
753 symbol level.
755 * Miles Bader provided the `argp' function family to support hierachical
756 command line argument parsing, layered on top of getopt.
758 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
760 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
761 numbers.
763 * scanf recognizes the %a and %A format for scanning floating point numbers.
765 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
766 information and interfaces for the available integer types.
768 * about 130 new math functions were added to implement the ISO C9x math
769 library.
771 * the new header <complex.h> contains definitions of the complex math
772 functions from ISO C 9X.
774 * the new header <tgmath.h> defines generic macros to use complex or
775 real valued functions.
777 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
779 * Andreas Jaeger provided a test suite for the math library.
781 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
783 * Ulrich Drepper added character set conversion functions (iconv).
785 * Optimized string functions have been added.
787 * The localedata addon is now part of glibc.
789 * An implementation of profiling shared libraries was added by Ulrich Drepper.
791 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
792 daemon for NSS (nscd).
794 Missing a better place here are some numbers on improvements. Under
795 Linux 2.1.125 un-tar-ing the kernel sources takes
797 user system wall
799 using local files 12.19s 6.88s 22.91s
801 using NIS 13.92s 8.91s 26.34s
803 using NIS & nscd 10.37s 7.34s 25.30s
805 using NIS+ 27.57s 30.37s 640.46s
807 using NIS+ & nscd 10.25s 7.83s 26.51s
809 using NIS & old nscd [1] 13.83s 8.32s 29.60s
811 Keep in mind that non-namelookup related operations dominate above times.
812 It was just a common complain that using NIS+ unpacking the kernel is
813 horribly slow.
815 [1] The old nscd implementation is not available anymore since it was
816 distributed with glibc up to version 2.0.98 and thus is now replaced.
818 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
820 * Mark Kettenis provided a Hesiod NSS module.
822 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
823 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
825 * rcmd can now handle netgroups (Dick Streefland).
827 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
828 Bambrough.
830 * Support for the IPv6 protocol has been added to the socket API, as per the
831 latest draft standards.
833 * Support for Linux 2.2 has been added.
835 * Interface changes relative to the latest 2.0.x release:
836 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
837 addseverity NEW: Unix98
838 alphasort64 NEW: LFS
839 argp_err_exit_status NEW: argp, GNU ext
840 argp_error NEW: argp, GNU ext
841 argp_failure NEW: argp, GNU ext
842 argp_help NEW: argp, GNU ext
843 argp_parse NEW: argp, GNU ext
844 argp_program_bug_address NEW: argp, GNU ext
845 argp_program_version NEW: argp, GNU ext
846 argp_program_version_hook NEW: argp, GNU ext
847 argp_state_help NEW: argp, GNU ext
848 argp_usage NEW: argp, GNU ext
849 authdes_create NEW: Secure RPC
850 authdes_getucred NEW: Secure RPC
851 authdes_pk_create NEW: Secure RPC
852 backtrace NEW: GNU ext.
853 backtrace_symbols NEW: GNU ext.
854 backtrace_symbols_fd NEW: GNU ext.
855 cacos NEW: ISO C 9x
856 cacosf NEW: ISO C 9x
857 cacosh NEW: ISO C 9x
858 cacoshf NEW: ISO C 9x
859 cacoshl NEW: ISO C 9x
860 cacosl NEW: ISO C 9x
861 capget NEW: kernel
862 capset NEW: kernel
863 carg NEW: ISO C 9x
864 cargf NEW: ISO C 9x
865 cargl NEW: ISO C 9x
866 casin NEW: ISO C 9x
867 casinf NEW: ISO C 9x
868 casinh NEW: ISO C 9x
869 casinhf NEW: ISO C 9x
870 casinhl NEW: ISO C 9x
871 casinl NEW: ISO C 9x
872 catan NEW: ISO C 9x
873 catanf NEW: ISO C 9x
874 catanh NEW: ISO C 9x
875 catanhf NEW: ISO C 9x
876 catanhl NEW: ISO C 9x
877 catanl NEW: ISO C 9x
878 cbc_crypt NEW: Secure RPC
879 ccos NEW: ISO C 9x
880 ccosf NEW: ISO C 9x
881 ccosh NEW: ISO C 9x
882 ccoshf NEW: ISO C 9x
883 ccoshl NEW: ISO C 9x
884 ccosl NEW: ISO C 9x
885 cexp NEW: ISO C 9x
886 cexpf NEW: ISO C 9x
887 cexpl NEW: ISO C 9x
888 cimag NEW: ISO C 9x
889 cimagf NEW: ISO C 9x
890 cimagl NEW: ISO C 9x
891 clearerr_locked REMOVED
892 clntunix_create NEW: sunrpc ext
893 clog NEW: ISO C 9x
894 clog10 NEW: ISO C 9x
895 clog10f NEW: ISO C 9x
896 clog10l NEW: ISO C 9x
897 clogf NEW: ISO C 9x
898 clogl NEW: ISO C 9x
899 conj NEW: ISO C 9x
900 conjf NEW: ISO C 9x
901 conjl NEW: ISO C 9x
902 cpow NEW: ISO C 9x
903 cpowf NEW: ISO C 9x
904 cpowl NEW: ISO C 9x
905 cproj NEW: ISO C 9x
906 cprojf NEW: ISO C 9x
907 cprojl NEW: ISO C 9x
908 creal NEW: ISO C 9x
909 crealf NEW: ISO C 9x
910 creall NEW: ISO C 9x
911 creat64 NEW: LFS
912 csin NEW: ISO C 9x
913 csinf NEW: ISO C 9x
914 csinh NEW: ISO C 9x
915 csinhf NEW: ISO C 9x
916 csinhl NEW: ISO C 9x
917 csinl NEW: ISO C 9x
918 csqrt NEW: ISO C 9x
919 csqrtf NEW: ISO C 9x
920 csqrtl NEW: ISO C 9x
921 ctan NEW: ISO C 9x
922 ctanf NEW: ISO C 9x
923 ctanh NEW: ISO C 9x
924 ctanhf NEW: ISO C 9x
925 ctanhl NEW: ISO C 9x
926 ctanl NEW: ISO C 9x
927 des_setparity NEW: Secure RPC
928 ecb_crypt NEW: Secure RPC
929 endutxent NEW: Unix98
930 exp10 NEW: ISO C 9x
931 exp10f NEW: ISO C 9x
932 exp10l NEW: ISO C 9x
933 exp2 NEW: ISO C 9x
934 exp2f NEW: ISO C 9x
935 exp2l NEW: ISO C 9x
936 fattach NEW: STREAMS
937 fdetach NEW: STREAMS
938 fdim NEW: ISO C 9x
939 fdimf NEW: ISO C 9x
940 fdiml NEW: ISO C 9x
941 feclearexcept NEW: ISO C 9x
942 fegetenv NEW: ISO C 9x
943 fegetexceptflag NEW: ISO C 9x
944 fegetround NEW: ISO C 9x
945 feholdexcept NEW: ISO C 9x
946 feof_locked REMOVED
947 feraiseexcept NEW: ISO C 9x
948 ferror_locked REMOVED
949 fesetenv NEW: ISO C 9x
950 fesetexceptflag NEW: ISO C 9x
951 fesetround NEW: ISO C 9x
952 fetestexcept NEW: ISO C 9x
953 feupdateenv NEW: ISO C 9x
954 fflush_locked REMOVED
955 ffsl NEW: GNU ext.
956 ffsll NEW: GNU ext.
957 fgetpos64 NEW: LFS
958 fgets_unlocked NEW: GNU ext.
959 fileno_locked REMOVED
960 fma NEW: ISO C 9x
961 fmaf NEW: ISO C 9x
962 fmal NEW: ISO C 9x
963 fmax NEW: ISO C 9x
964 fmaxf NEW: ISO C 9x
965 fmaxl NEW: ISO C 9x
966 fmin NEW: ISO C 9x
967 fminf NEW: ISO C 9x
968 fminl NEW: ISO C 9x
969 fmtmsg NEW: Unix98
970 fopen64 NEW: LFS
971 fputc_locked REMOVED
972 fputs_unlocked NEW: GNU ext.
973 fread_unlocked NEW: GNU ext.
974 freopen64 NEW: LFS
975 fseeko NEW: Unix98
976 fsetpos64 NEW: LFS
977 fstatfs64 NEW: LFS
978 fstatvfs NEW: Unix98
979 fstatvfs64 NEW: LFS
980 ftello NEW: Unix98
981 ftello64 NEW: LFS
982 ftruncate64 NEW: LFS
983 ftw64 NEW: LFS
984 fwrite_unlocked NEW: GNU ext.
985 gai_strerror NEW: IPv6
986 gamma_r REMOVED
987 gammaf_r REMOVED
988 gammal_r REMOVED
989 getchar_locked REMOVED
990 getdate NEW: Unix98
991 getdate_err NEW: Unix98
992 getdate_r NEW: GNU ext.
993 getmsg NEW: STREAMS
994 getnameinfo NEW: IPv6
995 getnetname NEW: Secure RPC
996 getpmsg NEW: STREAMS
997 getpt NEW: Unix98 PTY
998 getrlimit64 NEW: LFS
999 getutxent NEW: Unix98
1000 getutxid NEW: Unix98
1001 getutxline NEW: Unix98
1002 glob64 NEW: GNU ext.
1003 globfree64 NEW: GNU ext.
1004 gnu_get_libc_release NEW: GNU ext.
1005 gnu_get_libc_version NEW: GNU ext.
1006 grantpt NEW: Unix98 PTY
1007 host2netname NEW: Secure RPC
1008 iconv NEW: iconv
1009 iconv_close NEW: iconv
1010 iconv_open NEW: iconv
1011 if_freenameindex NEW: IPv6
1012 if_indextoname NEW: IPv6
1013 if_nameindex NEW: IPv6
1014 if_nametoindex NEW: IPv6
1015 in6addr_any NEW: IPv6
1016 in6addr_loopback NEW: IPv6
1017 inet6_isipv4mapped NEW: IPv6
1018 isastream NEW: STREAMS
1019 iswblank NEW: GNU ext.
1020 key_decryptsession NEW: Secure RPC
1021 key_decryptsession_pk NEW: Secure RPC
1022 key_encryptsession NEW: Secure RPC
1023 key_encryptsession_pk NEW: Secure RPC
1024 key_gendes NEW: Secure RPC
1025 key_get_conv NEW: Secure RPC
1026 key_secretkey_is_set NEW: Secure RPC
1027 key_setnet NEW: Secure RPC
1028 key_setsecret NEW: Secure RPC
1029 llrint NEW: ISO C 9x
1030 llrintf NEW: ISO C 9x
1031 llrintl NEW: ISO C 9x
1032 llround NEW: ISO C 9x
1033 llroundf NEW: ISO C 9x
1034 llroundl NEW: ISO C 9x
1035 log2 NEW: ISO C 9x
1036 log2f NEW: ISO C 9x
1037 log2l NEW: ISO C 9x
1038 lrint NEW: ISO C 9x
1039 lrintf NEW: ISO C 9x
1040 lrintl NEW: ISO C 9x
1041 lround NEW: ISO C 9x
1042 lroundf NEW: ISO C 9x
1043 lroundl NEW: ISO C 9x
1044 lseek64 NEW: LFS
1045 makecontext NEW: Unix98
1046 mempcpy NEW: GNU ext.
1047 mmap64 NEW: LFS
1048 moncontrol REMOVED
1049 modify_ldt NEW: kernel
1050 nan NEW: ISO C 9x
1051 nanf NEW: ISO C 9x
1052 nanl NEW: ISO C 9x
1053 nearbyint NEW: ISO C 9x
1054 nearbyintf NEW: ISO C 9x
1055 nearbyintl NEW: ISO C 9x
1056 netname2host NEW: Secure RPC
1057 netname2user NEW: Secure RPC
1058 nexttoward NEW: ISO C 9x
1059 nexttowardf NEW: ISO C 9x
1060 nexttowardl NEW: ISO C 9x
1061 nftw NEW: Unix98
1062 nftw64 NEW: LFS
1063 open64 NEW: LFS
1064 passwd2des NEW: Secure RPC
1065 pow10 NEW: GNU ext.
1066 pow10f NEW: GNU ext.
1067 pow10l NEW: GNU ext.
1068 pread NEW: Unix98
1069 pread64 NEW: LFS
1070 printf_size NEW: GNU ext.
1071 printf_size_info NEW: GNU ext.
1072 profil_counter REMOVED
1073 pthread_mutexattr_getkind_np REPLACED
1074 pthread_mutexattr_setkind_np REPLACED
1075 ptsname NEW: Unix98 PTY
1076 ptsname_r NEW: Unix98 PTY
1077 putc_locked REMOVED
1078 putchar_locked REMOVED
1079 putgrent NEW: GNU ext.
1080 putmsg NEW: STREAMS
1081 putpmsg NEW: STREAMS
1082 pututxline NEW: Unix98
1083 pwrite NEW: Unix98
1084 pwrite64 NEW: LFS
1085 readdir64 NEW: LFS
1086 readdir64_r NEW: LFS
1087 remquo NEW: ISO C 9x
1088 remquof NEW: ISO C 9x
1089 remquol NEW: ISO C 9x
1090 round NEW: ISO C 9x
1091 roundf NEW: ISO C 9x
1092 roundl NEW: ISO C 9x
1093 rtime NEW: GNU ext.
1094 scalbln NEW: ISO C 9x
1095 scalblnf NEW: ISO C 9x
1096 scalblnl NEW: ISO C 9x
1097 scandir64 NEW: LFS
1098 sendfile NEW: kernel
1099 setcontext NEW: Unix98
1100 setrlimit64 NEW: LFS
1101 setutxent NEW: Unix98
1102 sighold NEW: Unix98
1103 sigignore NEW: Unix98
1104 sigqueue NEW: POSIX.1b
1105 sigrelse NEW: Unix98
1106 sigset NEW: POSIX.1b
1107 sigtimedwait NEW: POSIX.1b
1108 sigwaitinfo NEW: POSIX.1b
1109 sincos NEW: GNU ext.
1110 sincosf NEW: GNU ext.
1111 sincosl NEW: GNU ext.
1112 statfs64 NEW: LFS
1113 statvfs NEW: Unix98
1114 statvfs64 NEW: LFS
1115 strcasestr NEW: GNU ext.
1116 strtoimax NEW: ISO C 9x
1117 strtoumax NEW: ISO C 9x
1118 strverscmp NEW: GNU ext.
1119 svcauthdes_stats NEW: Secure RPC
1120 svcunix_create NEW: sunrpc etx
1121 svcunixfd_create NEW: sunrpc ext
1122 swapcontext NEW: Unix98
1123 tcgetsid NEW: Unix98 PTY
1124 tdestroy NEW: GNU ext.
1125 tgamma NEW: ISO C 9x
1126 tgammaf NEW: ISO C 9x
1127 tgammal NEW: ISO C 9x
1128 tmpfile64 NEW: LFS
1129 trunc NEW: ISO C 9x
1130 truncate64 NEW: LFS
1131 truncf NEW: ISO C 9x
1132 truncl NEW: ISO C 9x
1133 umount2 NEW: kernel
1134 unlockpt NEW: Unix98 PTY
1135 updwtmpx NEW: Unix98
1136 user2netname NEW: Secure RPC
1137 utmpxname NEW: Unix98
1138 versionsort NEW: GNU ext.
1139 versionsort64 NEW: GNU ext.
1140 waitid NEW: Unix98
1141 wcscasecmp NEW: GNU ext.
1142 wcsncasecmp NEW: GNU ext.
1143 wcsnlen NEW: GNU ext.
1144 wcstoimax NEW: ISO C 9x
1145 wcstoll NEW: ISO C 9x
1146 wcstoull NEW: ISO C 9x
1147 wcstoumax NEW: ISO C 9x
1148 wcswcs NEW: Unix98
1149 wordexp NEW: POSIX.2
1150 wordfree NEW: POSIX.2
1151 write_profiling REMOVED
1152 xdecrypt NEW: Secure RPC
1153 xdr_authdes_cred NEW: Secure RPC
1154 xdr_authdes_verf NEW: Secure RPC
1155 xdr_cryptkeyarg NEW: Secure RPC
1156 xdr_cryptkeyarg2 NEW: Secure RPC
1157 xdr_cryptkeyres NEW: Secure RPC
1158 xdr_getcredres NEW: Secure RPC
1159 xdr_key_netstarg NEW: Secure RPC
1160 xdr_key_netstres NEW: Secure RPC
1161 xdr_keybuf NEW: Secure RPC
1162 xdr_keystatus NEW: Secure RPC
1163 xdr_netnamestr NEW: Secure RPC
1164 xdr_sizeof NEW: Secure RPC
1165 xdr_unixcred NEW: sunrpc ext
1166 xencrypt NEW: Secure RPC
1167 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1168 \f
1169 Version 2.0.6
1171 * more bug fixes
1173 \f
1174 Version 2.0.5
1176 * more bug fixes
1178 * inet_ntoa is thread-safe
1180 * updwtmp is moved from libutil to libc
1182 * rewrite of cbrt function
1184 * update of timezone data
1185 \f
1186 Version 2.0.4
1188 * more bug fixes
1189 \f
1190 Version 2.0.3
1192 * more bug fixes
1193 \f
1194 Version 2.0.2
1196 * more bug fixes
1198 * add atoll function
1200 * fix complex problems in Berkeley DB code
1202 * fix math functions
1203 \f
1204 Version 2.0.1
1206 * fixed lots of header problems (especially Linux/GNU specific)
1208 * dynamic loader preserves all registers
1210 * Roland McGrath provided support for handling of auxiliary objects in
1211 the ELF dynamic loader.
1213 * support for parallel builds is improved
1214 \f
1215 Version 2.0
1217 * GNU extensions are no longer declared by default. To enable them you
1218 must define the macro `_GNU_SOURCE' in your program or compile with
1219 `-D_GNU_SOURCE'.
1221 * The library has changed from using GNU ld symbol aliases to using weak
1222 symbols where available. The ELF object file format supports weak
1223 symbols; GNU ld also supports weak symbols in the a.out format. (There
1224 is also now support for other GNU ld extensions in ELF. Use the
1225 `--with-elf' option to configure to indicate you have ELF, and
1226 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1227 of many files which contained only symbol aliases, reducing the size of
1228 the source and the compiled library; many other files were renamed to
1229 less cryptic names previously occupied by the symbol alias files.
1230 There is a new header file <elf.h> for programs which operate on
1231 files in the ELF format.
1233 * Converted to Autoconf version 2, so `configure' has more options.
1234 Run `configure --help' to see the details.
1236 * The library can now be configured to build profiling, highly-optimized
1237 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1238 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1239 `configure' enable building these extra libraries. The shared library is
1240 built by default when using both ELF and GNU ld. When shared libraries
1241 are enabled, the new library `-ldl' is available for arbitrary run-time
1242 loading of shared objects; its interface is defined in <dlfcn.h>. The
1243 new header file <link.h> gives access to the internals of the run-time
1244 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1245 application of same name on other systems and it provides information
1246 about dynamically linked binaries.
1248 * The C library now provides the run-time support code for profiling
1249 executables compiled with `-pg'. Programs can control the profiling code
1250 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1251 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1252 the support for this file format was contributed by David Mosberger-Tang.
1254 * The math code has been replaced with a math library based on fdlibm from
1255 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1256 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1257 functions. The math functions now reside in a separate library, so
1258 programs using them will need to use `-lm' their linking commands.
1260 * John C. Bowman contributed optimized ix87 assembler inline functions.
1262 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1263 mechanism similar to that found in Solaris 2. This is now used for the
1264 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1265 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1266 file controls what services are used for each individual database. This
1267 works by loading shared libraries with names specified in `nsswitch.conf',
1268 so service modules can be changed or added at any time without even
1269 relinking any program. Currently there are the file, db, and NIS based
1270 NSS services available.
1272 * The new functions `strtoq' and `strtouq' parse integer values from
1273 strings, like `strtol' and `strtoul', but they return `long long int' and
1274 `unsigned long long int' values, respectively (64-bit quantities).
1276 * The new functions `strtof' and `strtold' parse floating-point values from
1277 strings, like `strtod', but they return `float' and `long double' values,
1278 respectively (on some machines `double' and `long double' are the same).
1280 * Ulrich Drepper has contributed new implementations of the floating-point
1281 printing and reading code used in the `printf' family of functions and
1282 `strtod', `strtof', and `strtold'. These new functions are perfectly
1283 accurate, and much faster than the old ones.
1285 * The implementation of the POSIX locale model was completely rewritten by
1286 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1287 to compile the POSIX locale definition.
1289 * The former dummy implementations of the strcoll and strxfrm function are
1290 now replaced by fully functional code contributed by Ulrich Drepper. The
1291 collation information comes from the POSIX locale definitions.
1293 * The new header <langinfo.h> defines an interface for accessing
1294 various locale-dependent data (using the locale chosen with `setlocale').
1296 * Ulrich Drepper has contributed a new suite of functions for operation on
1297 wide-character and multibyte-character strings, in <wchar.h>;
1298 and classification and case conversion of wide characters, in <wctype.h>.
1299 These new functions are conforming to the ISO C, Amendement 1 specification.
1301 * There is now a second implementation of the standard I/O library available.
1302 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1303 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1305 * You can now use positional parameter specifications in format strings
1306 for the `printf' and `scanf' families of functions. For example,
1307 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1308 ``Number 6, Mr Jones''. This is mainly useful when providing different
1309 format strings for different languages, whose grammars may dictate
1310 different orderings of the values being printed. To support this
1311 feature, the interface for `register_printf_handler' has changed; see
1312 the header file <printf.h> for details.
1314 * The `printf' and `scanf' families of functions now understand a new
1315 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1316 to group numbers as indicated by the locale; for `scanf' and friends, this
1317 says to accept as valid only a number with all the proper grouping
1318 separators in the right places. In the default "C" locale, numbers are
1319 not grouped; but locales for specific countries will define the usual
1320 conventions (i.e. separate thousands with `,' in the US locale).
1322 * The pgrp functions have been regularized, slightly incompatibly but much
1323 less confusingly. The core functions are now `getpgid' and `setpgid',
1324 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1325 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1326 provided for compatibility. There is no longer an incompatible `getpgrp'
1327 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1329 * The new header file <fts.h> and suite of functions simplify programs that
1330 operate on directory trees. This code comes from 4.4 BSD.
1332 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1333 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1334 NSS scheme used in glibc.
1336 * There is a new malloc debugging hook `__memalign_hook'.
1338 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1339 `unsigned int' in <sys/types.h>. These are for compatibility only and
1340 their use is discouraged.
1342 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1343 done differently, so that it works even without GNU ld.
1345 * New function `euidaccess' checks allowed access to a file like `access',
1346 but using the effective IDs instead of the real IDs.
1348 * The time zone data files have been updated for the latest and greatest
1349 local time conventions of the countries of the world.
1351 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1352 see <dirent.h>.
1354 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1355 for formatting floating-point numbers. They are provided only for
1356 compatibility; new programs should use `sprintf' instead. There are
1357 also equivalent function for the `long double' floating-point type and
1358 all functions also exist in a reentrant form.
1360 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1361 functions for maintaining the login-record files (primarily of use to
1362 system programs such as `login'), and convenient functions for
1363 allocating and initializing a pseudo-terminal (pty) device.
1365 * Ulrich Drepper has contributed new support for System V style
1366 shared memory and IPC on systems that support it.
1368 * Ulrich Drepper has contributed several miscellaneous new functions found
1369 in System V: The `hsearch' family of functions provide an effective
1370 implementation of hash tables; `a64l' and `l64a' provide a very simple
1371 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1372 number generator.
1374 * Ulrich Drepper has contributed new reentrant counterparts for the
1375 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1377 * Ulrich Drepper has contributed new, highly-optimized versions of several
1378 string functions for the i486/Pentium family of processors.
1380 * Ulrich Drepper has updated the Linux-specific code, based largely
1381 on work done in Hongjiu Lu's version of GNU libc for Linux.
1382 The GNU library now supports Linux versions 2.0.10 and later,
1383 using the ELF object file format (i[3456]86-*-linux).
1385 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1387 * David Mosberger-Tang and Richard Henderson have ported the C library
1388 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1389 dynamic linking support for ELF/Alpha.
1391 * Richard Henderson contributed several Alpha optimized assembler function
1392 for arithmetic and string handling.
1394 * Ulrich Drepper has contributed a new set of message catalog functions to
1395 support multiple languages using the <libintl.h> interface, for use with
1396 his new package GNU gettext. Translation volunteers have contributed
1397 catalogs of the library's messages in Spanish, German, and Korean.
1399 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1400 program and the `catgets' function for reading the catalog files it
1401 creates. (The <libintl.h> interface is preferred; we include the
1402 <nl_types.h> interface using `catgets' only for source compatibility with
1403 programs already written to use it.)
1405 * New header file <values.h> gives SVID-compatible names for <limits.h>
1406 constants.
1408 * Various new macros, declarations, and small header files for compatibility
1409 with 4.4 BSD.
1411 * New function `group_member' is a convenient way to check if a process has
1412 a given effective group ID.
1414 * When using GCC 2.7 and later, the socket functions are now declared in a
1415 special way so that passing an argument of type `struct sockaddr_in *',
1416 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1417 `struct sockaddr *' type, does not generate a type-clash warning.
1419 * New function `error' declared in header file <error.h> is a convenient
1420 function for printing error messages and optionally exiting; this is the
1421 canonical function used in GNU programs. The new functions `err', `warn',
1422 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1423 doing the same thing.
1425 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1426 POSIX.2 `glob' function to do ~ and {...} expansion.
1428 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1429 `clearenv' which is used in POSIX.9 is also available.
1431 * New function `getsid' returns session ID number on systems that support it.
1433 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1434 files <db.h> and <mpool.h> provide a rich set of functions for several
1435 types of simple databases stored in memory and in files, and <ndbm.h> is
1436 an old `ndbm'-compatible interface using the `db' functions. Link with
1437 `-ldb' to get these functions.
1439 * New macro `strdupa' copies a string like `strdup', but uses local stack
1440 space from `alloca' instead of dynamic heap space from `malloc'.
1442 * New function `strnlen' is like `strlen' but searches only a given maximum
1443 number of characters for the null terminator. `stpncpy', `strndup' and
1444 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1445 function.
1447 * New function `statfs' in header <sys/statfs.h>.
1449 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1450 provide convenient functions for operating on blocks of null-terminated
1451 strings.
1453 * A new suite of functions in <utmp.h> handle all the details of reading
1454 and writing the utmp file.
1456 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1457 Thorsten Kukuk.
1459 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1460 completely POSIX compliant and also implemented the extended functionality
1461 to handle alternate digit representation and alternate era date formats.
1463 * Ulrich Drepper provided an implementation of the `strptime' function
1464 defined in XPG4.2 which transforms a string into a `struct tm' value.
1466 * Paul Eggert provided the tzselect shell script as part of the timezone
1467 code. The shell script makes it easy to select the correct timezone
1468 specification.
1470 * The implementation of the malloc family of functions is completely replaced
1471 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1472 The implementation uses the mmap function (if available) and it is
1473 optimized for the use in multi threaded programs.
1475 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1476 functions. This new functionality is usable by specifying a special
1477 salt string and it is compatible with implementation on *BSD systems.
1479 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1480 `getsubopt' to handle second level command line options, `bsd_signal'
1481 to access BSD style `signal' functionality, the obsolete `regexp' style
1482 expression matcher.
1484 * the `lchown' function is available on system which support this
1485 functionality.
1487 * The implementation of the shadow password handling function was contributed
1488 by Ulrich Drepper.
1490 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1492 * POSIX.1g support was added. The <sys/select.h> header is available,
1493 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1494 implementation of `getaddrinfo'.
1495 \f
1496 Version 1.09
1498 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1500 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1501 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1503 * The new function `daemon' from 4.4 BSD is useful for server programs that
1504 want to put themselves in the background.
1506 * Joel Sherrill has contributed support for several standalone boards that
1507 run without an operating system.
1509 * `printf', `scanf' and friends now accept a `q' type modifier for long
1510 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1512 * All of the code taken from BSD (notably most of the math and networking
1513 routines) has been updated from the BSD 4.4-Lite release.
1515 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1517 * The new functions `getdomainname' and `setdomainname' fetch or change the
1518 YP/NIS domain name. These are system calls which exist on systems which
1519 have YP (aka NIS).
1521 * The time zone data files have been updated for the latest international
1522 conventions.
1524 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1525 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1526 \f
1527 Version 1.08
1529 * The C library now includes support for Sun RPC, from Sun's free
1530 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1531 are included. (There is still no support for YP.)
1533 * Tom Quinn has contributed a port of the C library to SGI machines running
1534 Irix 4 (mips-sgi-irix4).
1536 * The new `lockf' function is a simplified interface to the locking
1537 facilities of `fcntl', included for compatibility.
1539 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1541 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1543 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1544 compatibility.
1546 * The error message printed by `assert' for a failed assertion now includes
1547 the name of the program (if using GNU ld) and the name of the calling
1548 function (with versions of GCC that support this).
1550 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1552 * The library now includes the <sys/mman.h> header file and memory
1553 management functions `mmap', `munmap', `mprotect', `msync', and
1554 `madvise', on systems that support those facilities.
1556 * The interface for `mcheck' has changed slightly: the function called to
1557 abort the program when an allocation inconsistency is detected now takes
1558 an argument that indicates the type of failure. The new function
1559 `mprobe' lets you request a consistency check for a particular block at
1560 any time (checks are normally done only when you call `free' or `realloc'
1561 on a block).
1563 * It is now possible to easily cross-compile the C library, building on one
1564 system a library to run on another machine and/or operating system. All
1565 you need to do is set the variable `HOST_CC' in `configparms' to the
1566 native compiler for programs to run on the machine you are building on (a
1567 few generator programs are used on Unix systems); set `CC' to the
1568 cross-compiler.
1570 * The new function `fexecve' (only implemented on the GNU system) executes
1571 a program file given a file descriptor already open on the file.
1572 \f
1573 Version 1.07
1575 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1576 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1578 * You can set the variable `libprefix' in `configparms' to specify a prefix
1579 to be prepended to installed library files; this makes it easy to install
1580 the GNU C library to be linked as `-lgnuc' or whatever.
1582 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1583 copies a limited number of characters from a string, and returns the
1584 address of the last character written.
1586 * You no longer need to check for whether the installed `stddef.h' is
1587 compatible with the GNU C library. configure now checks for you.
1589 * You can now define a per-stream `fileno' function to convert the
1590 stream's cookie into an integral file descriptor.
1592 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1593 allocates zero bytes of storage, and returns a unique pointer which
1594 you can pass to `realloc' or `free'. The behavior is undefined if
1595 you dereference this pointer.
1597 * The C library now runs on Sony NEWS m68k machines running either
1598 NewsOS 3 or NewsOS 4.
1600 * The new `syscall' function is a system-dependent primitive function
1601 for invoking system calls. It has the canonical behavior on Unix
1602 systems, including unreliable return values for some calls (such as
1603 `pipe', `fork' and `getppid').
1605 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1606 to `EAGAIN', which is the preferred name. On systems whose kernels
1607 use two distinct codes, the C library now translates EWOULDBLOCK to
1608 EAGAIN in every system call function.
1609 \f
1610 Version 1.06
1612 * The GNU C Library Reference Manual is now distributed with the library.
1613 `make dvi' will produce a DVI file of the printed manual.
1614 `make info' will produce Info files that you can read on line using C-h i
1615 in Emacs or the `info' program.
1616 Please send comments on the manual to bug-glibc-manual@gnu.org.
1618 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1620 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1622 * Jason Merrill has contributed a port to the Sequent Symmetry running
1623 Dynix version 3 (i386-sequent-dynix).
1625 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1626 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1628 * New function `memory_warnings' lets you arrange to get warnings when
1629 malloc is running out of memory to allocate, like Emacs gives you.
1631 * The C library now contains the relocating allocator used in Emacs 19 for
1632 its editing buffers. This allocator (ralloc) minimizes allocation
1633 overhead and fragmentation by moving allocated regions around whenever it
1634 needs to. You always refer to a ralloc'd region with a "handle" (a
1635 pointer to a pointer--an object of type `void **').
1637 * There is a new `printf' format: `%m' gives you the string corresponding
1638 to the error code in `errno'.
1640 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1641 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1642 pass, the `a' modifier says to fill in a `char **' you pass with a
1643 malloc'd string.
1645 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1646 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1647 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1649 * `mkstemp' is a traditional Unix function to atomically create and open a
1650 uniquely-named temporary file.
1651 \f
1652 Version 1.05
1654 * The standard location for the file that says what the local timezone is
1655 has changed again. It is now `/usr/local/etc/localtime' (or more
1656 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1658 * The distribution no longer contains any files with names longer than 14
1659 characters.
1661 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1662 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1664 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1665 \f
1666 Version 1.04
1668 * The configuration process has changed quite a bit. The `configure'
1669 script is now used just like the configuration scripts for other GNU
1670 packages. The `sysdeps' directory hierarchy is much rearranged.
1671 The file `INSTALL' explains the new scheme in detail.
1673 * The header files no longer need to be processed into ANSI C and
1674 traditional C versions. There is just one set of files to install, and
1675 it will work with ANSI or old C compilers (including `gcc -traditional').
1677 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1678 MIPS DECStation running Ultrix 4.
1680 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1681 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1682 made itself into a shared library.
1684 * Yet further improved support for the i386, running 4.3 BSD-like systems
1685 (such as Mach 3 with the Unix single-server), or System V.
1687 * New function `strncasecmp' to do case-insensitive string comparison
1688 with limited length.
1690 * New function `strsep' is a reentrant alternative to `strtok'.
1692 * New functions `scandir' and `alphasort' for searching directories.
1694 * New function `setenv' is a better interface to `putenv'.
1696 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1697 function for traversing a directory tree.
1699 * The GNU obstack package is now also part of the C library.
1700 The new function `open_obstack_stream' creates a stdio stream that
1701 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1702 formatted output directly to an obstack.
1704 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1705 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1707 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1709 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1710 things to your strings.
1712 * There are some new test programs: test-fseek, testmb, and testrand.
1714 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1715 These ports are not finished, but are a good starting place for really
1716 supporting those systems.
1718 * `/etc/localtime' is now the standard location for the file that says what
1719 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1720 This follows the general principle that `/etc' is the place for all local
1721 configuration files.
1723 * The C library header files now use `extern "C"' when used by the C++
1724 compiler, so the C library should now work with C++ code.
1726 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1727 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1728 in <strings.h>.)
1730 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1731 function which uses the `merge sort' algorithm, and is said to be
1732 significantly faster than the old GNU `qsort' function. Merge sort is
1733 now the standard `qsort' function. The new algorithm can require a lot
1734 of temporary storage; so, the old sorting function is called when the
1735 required storage is not available.
1737 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1738 provides the Unix `crypt' function, plus some other entry points.
1740 * The code and header files taken from 4.4 BSD have been updated with the
1741 latest files released from Berkeley.
1742 \f
1743 ----------------------------------------------------------------------
1744 Copyright information:
1746 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1747 Free Software Foundation, Inc.
1749 Permission is granted to anyone to make or distribute verbatim copies
1750 of this document as received, in any medium, provided that the
1751 copyright notice and this permission notice are preserved,
1752 thus giving the recipient permission to redistribute in turn.
1754 Permission is granted to distribute modified versions
1755 of this document, or of portions of it,
1756 under the above conditions, provided also that they
1757 carry prominent notices stating who last changed them.
1758 \f
1759 Local variables:
1760 version-control: never
1761 End: