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1 GNU C Library NEWS -- history of user-visible changes. 2009-2-26
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 Linux interface: accept4
12 * Correct declarations of string function when used in C++ code. This
13 could lead to compile error for invalid C++ code.
15 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
16 now in POSIX.
18 * New POSIX 2008 interface: psiginfo
19 Implemented by Ulrich Drepper.
21 \f
22 Version 2.9
24 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
25 up at the same time. Implemented by Ulrich Drepper.
27 * TLS descriptors for LD and GD on x86 and x86-64.
28 Implemented by Alexandre Oliva.
30 * getaddrinfo now handles DCCP and UDPlite.
31 Implemented by Ulrich Drepper.
33 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
34 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
35 Implemented by Ulrich Drepper.
37 * New implementation of memmem, strstr, and strcasestr which is O(n).
38 Implemented by Eric Blake.
40 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
42 * Implement "e" option for popen to open file descriptor with the
43 close-on-exec flag set. Implemented by Ulrich Drepper.
45 * Implement "b" mode for fmemopen. In this mode writes writes don't
46 implicitly add a NUL byte and seeks from the end of the buffer really
47 use the buffer end, not the string length as the basis.
48 Implemented by Ulrich Drepper.
50 * Many functions, exported and internal, now atomically set the close-on-exec
51 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
53 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
54 Sinhala)
55 Implemented by Pravin Satpute.
57 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
58 \f
59 Version 2.8
61 * New locales: bo_CN, bo_IN, shs_CA.
63 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
65 * Sorting rules for some Indian languages (Devanagari and Gujarati).
66 Implemented by Pravin Satpute.
68 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
70 * nscd caches now all timeouts for DNS entries
71 Implemented by Ulrich Drepper.
73 * nscd is more efficient and wakes up less often.
74 Implemented by Ulrich Drepper.
76 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
77 vdprintf, and obstack_vprintf.
78 Implemented by Jakub Jelinek.
80 * Faster memset for x86-64.
81 Implemented by Harsha Jagasia and H.J. Lu.
83 * Faster memcpy on x86.
84 Implemented by Ulrich Drepper.
86 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
87 Implemented by Ulrich Drepper.
89 * Faster sqrt and sqrtf implemention for some PPC variants.
90 Implemented by Stephen Munroe.
91 \f
92 Version 2.7
94 * More checking functions: fread, fread_unlocked, open*, mq_open.
95 Implemented by Jakub Jelinek and Ulrich Drepper.
97 * Extend fortification to C++. Implemented by Jakub Jelinek.
99 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
100 by not recognizing 'a' as a modifier when those specs are requested.
101 Implemented by Jakub Jelinek.
103 * PPC optimizations to math and string functions.
104 Implemented by Steven Munroe.
106 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
107 options to be passed. Implemented by Ulrich Drepper.
109 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
111 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
112 Implemented by Ulrich Drepper.
114 * Handle private futexes in the NPTL implementation.
115 Implemented by Jakub Jelinek and Ulrich Drepper.
117 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
118 Implemented by Roland McGrath and Ulrich Drepper.
120 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
122 * SHA-256 and SHA-512 based password encryption.
123 Implemented by Ulrich Drepper.
125 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
126 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
127 yo_NG.
129 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
130 Implemented by Ulrich Drepper.
131 \f
132 Version 2.6
134 * New Linux interfaces: epoll_pwait, sched_getcpu.
136 * New generic interfaces: strerror_l.
138 * nscd can now cache the services database. Implemented by Ulrich Drepper.
140 \f
141 Version 2.5
143 * For Linux, the sorting of addresses returned by getaddrinfo now also
144 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
145 Implemented by Ulrich Drepper.
147 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
148 Implemented by Ulrich Drepper.
150 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
152 * New iconv module for MIK. Contributed by Alexander Shopov.
154 * For sites with broken group and/or passwd database, the auto-propagate
155 option of nscd can prevent creating ID lookup entries from the results
156 of a name lookup and vice versa. This usually is no problem but some
157 site might have problems with the default behavior.
158 Implemented by Ulrich Drepper.
160 * Iterating over entire database in NIS can be slow. With the
161 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
162 to trade time for memory. The entire database will be read at once.
163 Implemented by Ulrich Drepper.
165 * The interfaces introduced in RFC 3542 have been implemented by
166 Ulrich Drepper.
168 * Support for the new ELF hash table format was added by Ulrich Drepper.
170 * Support for priority inheritance mutexes added by Jakub Jelinek and
171 Ulrich Drepper.
173 * Support for priority protected mutexes added by Jakub Jelinek.
175 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
176 or_IN, csb_PL, fy_NL, sr_ME.
177 \f
178 Version 2.4
180 * More overflow detection functions.
182 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
183 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
185 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
186 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
187 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
188 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
189 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
190 by Masahide Washizawa.
192 * It is now possible to install audit libraries for the dynamic linker using
193 LD_AUDIT. Implemented by Ulrich Drepper.
195 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
196 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
197 For a libc and libpthread that works well on Linux 2.4 kernels, we
198 recommend using the stable 2.3 branch.
200 * The new function open_wmemstream acts like open_memstream,
201 but uses a wchar_t wide character buffer.
203 * The new function ppoll is an improved version of poll, similar to pselect.
205 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
206 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
207 renameat, unlinkat, linkat, symlinkat, readlinkat.
209 * New Linux kernel system calls: unshare,
210 inotify_init, inotify_add_watch, inotify_rm_watch.
212 * The euidaccess function is now also known by the alias eaccess,
213 for compatibility with some other systems.
215 * Timezone data updated to 2006b version.
216 \f
217 Version 2.3.6
219 * The following bugs are resolved with this release:
221 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
222 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
223 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
224 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
225 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
226 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
228 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
230 * As of this release, GCC 4 can be used to compile the C Library.
232 * Timezone data updated to 2005m version.
233 \f
234 Version 2.3.5
236 * The following bugs are resolved with this release:
238 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
239 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
240 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
241 777, 787, 821, 822, 823, 825
243 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
244 \f
245 Version 2.3.4
247 * Support for RFC 3678. Real implementations exist only for Linux so far.
248 Implemented by Ulrich Drepper.
250 * nscd can now cache entries persistently. Expiring entries are reloaded.
251 For speedups the cache can be shared in memory with client processes.
252 Implemented by Ulrich Drepper.
254 * nscd can now perform SELinux checks.
255 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
257 * getaddrinfo queries are now cached. Canonical name lookup is performed
258 efficiently.
259 Implemented by Ulrich Drepper.
261 * The nothrow function attribute is used when headers are used by gcc when
262 compiling C code. This can avoid significant amounts of exception
263 handling data.
265 * The malloc functions perform more error checking and are stricter when
266 it comes to reacting on errors. The default action is to terminate
267 the process after showing an error message. Implemented by Ulrich Drepper.
269 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
270 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
272 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
273 namespaces using the new function dlmopen(). This feature is of course,
274 like most other dynamic loading functionality, not available in statically
275 linked applications. Implemented by Ulrich Drepper.
277 * Low-overhead boundary checking variants of string and some stdio functions
278 were added. These are to be used in conjunction with a gcc patch by
279 Jakub Jelinek which adds calls to these functions if possible.
280 Implemented by Jakub Jelinek and Ulrich Drepper.
282 * Old code for several operating systems and machine architectures that
283 have not been in working condition in a long time have been removed from
284 the main source tree maintained by the GNU C Library's maintainers.
285 These files are now reside in the separate `ports' source module
286 that is usable as an add-on when building the library.
287 \f
288 Version 2.3.3
290 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
291 interrogate the dynamic linker, compatible with the Solaris interface.
293 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
294 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
296 * getifaddrs now uses the netlink interface on Linux to get its information.
297 Implemented by Thorsten Kukuk.
299 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
300 Implemented by Ulrich Drepper.
302 * support for non-executable stacks on x86 has been added. Changes mostly
303 by Roland McGrath.
305 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
306 and Ulrich Drepper.
308 * getaddrinfo now performs destination address selection according to
309 RFC 3484.
310 \f
311 Version 2.3.2
313 * Thread-safe interfaces for many functions that access locale data
314 were added in version 2.3, but these features were omitted from NEWS.
315 Many functions have variants with an `_l' suffix that take a `locale_t'
316 object as a parameter rather than consulting the current locale.
317 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
318 create and maintain `locale_t' objects. Additionally, the new function
319 `uselocale' sets "the current locale" (as used by functions not so
320 parameterized) set for an individual thread. These features were added
321 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
323 * The functions getresuid, getresgid, setresuid, and setresgid, which
324 have long been available on Linux, are now declared in <unistd.h>
325 and are now also available on the Hurd.
327 * ELF thread-local storage support (TLS) now works on x86-64.
329 * The new dynamic string token $LIB is expanded in shared library names.
330 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
332 * Aldy Hernandez contributed complete software floating point support for
333 PowerPC machines with no FPU.
335 * fexecve is implemented on Linux.
337 * The `btowc' function should work at least twice as fast due to
338 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
340 * With approriate thread add-ons cancelable functions are now implemented
341 in libc.so as well. No need to call the function in libpthread. This
342 change allowed to finally disable the incorrect and expensive handling
343 of weak definition in ld.so.
345 * Yet more PLT entries in libc.so have been removed. We finally arrived
346 at the bare minimum. Startup times improved appropriately.
348 * Support for the new Linux/x86 system call interface was added. The
349 AT_SYSINFO auxiliary vector entry is recognized and handled.
350 \f
351 Version 2.3
353 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
354 charsets.
356 * iconv (the program and the interface) now accepts empty names (excluding
357 options like //TRANSLIT) to mean "use charset of current locale".
359 * localedef can now transliterate characters in strings which are not in
360 the provided charmap. The information from the input locale is used.
362 * Prelinking support was added for ELF targets. This requires additional
363 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
365 * Read-only stdio streams now use mmap to speed up operation by eliminating
366 copying and buffer underflows. To use add 'm' to the mode string of
367 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
369 * The malloc functions were completely rewritten by Wolfram Gloger based
370 on Doug Lea's malloc-2.7.0.c.
372 * Isamu Hasegawa contributed a completely new and POSIX-conformant
373 implementation of regex.
375 * Bruno Haible upgraded the iconv and locale implementation to support
376 Unicode 3.2.
378 * Contents of the LC_* and LANG environment variables in the CEN style are
379 not recognized anymore. It never was used. Change by Ulrich Drepper.
381 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
382 thread-local storage (TLS) ABI on some platforms.
383 Changes by Ulrich Drepper. SH support by Kaz Kojima.
385 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
386 EUC-JISX0213, and TSCII.
388 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
389 BSD-compatible interface for getting all network interface addresses.
390 Implementation for IPv4 by Roland McGrath.
392 * Loading of locale data is faster due to the introduction of a locale
393 archive. Implemented by Roland McGrath and Ulrich Drepper.
395 * Startup times are significantly reduced by not using exported functions
396 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
397 and Ulrich Drepper.
399 * Steven Munroe contributed a port to PowerPC64/Linux.
400 \f
401 Version 2.2.6
403 * The Hurd now uses the GNU libio implementation of stdio rather than the
404 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
406 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
407 with the same behavior as the Linux system call of the same name.
408 \f
409 Version 2.2.5
411 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
412 128-bit long double format.
414 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
415 IBM1161, and IBM1162 charsets.
417 * Andreas Jaeger contributed a port to x86-64/Linux.
419 * Peter Bruin contributed a port to PowerPC/Hurd.
421 * libc functions using I/O streams now can handle wide-oriented streams
422 as well.
424 * optimizations in the dynamic linker. Binaries created by recent binutils
425 versions start up quicker due to reduced time spent on relocations.
427 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
428 \f
429 Version 2.2.4
431 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
432 asinh, atanh, j0 for the 128-bit long double format.
434 * Bruno Haible updated all the code handling Unicode in some form to
435 support Unicode 3.1.
437 * Speed of regex for single-byte locales is back to previous levels.
438 Patch by Isamu Hasegawa.
440 * Alpha, SPARC, and IA-64 now also using floating stacks.
442 * Startup time of internationalized applications greatly improved through
443 iconv cache. Use iconvconfig to generate the cache file.
444 Contributed by Ulrich Drepper.
446 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
447 severe performance problems. Patch by David Mosberger.
449 * The Hurd port got a lot more functionality like AIO, various stdio
450 extensions, etc. Mainly done by Roland McGrath.
452 * mtrace can now lookup symbols in shared libraries.
453 \f
454 Version 2.2.3
456 * Intel's IA-64 math library is largely integrated. It provides fast and
457 accurate implementatations for most basic and standard math functions
458 in float, double, and long double format.
460 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
461 and asin for the 96-bit long double format and asin, log, tan for the
462 128-bit long double format.
464 * The beginning of a last-bit accurate math library by IBM Haifa were added.
465 The basic double functions exist today. Contributed by Abraham Ziv
466 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
467 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
469 * An asynchronous name lookup library was added. The interface is designed
470 after POSIX AIO. The proposal was circulated beforehand to get comments.
471 No negative ones came in. Implemented by Ulrich Drepper.
473 * Port to S390/64bit contributed by Martin Schwidefsky
474 <schwidefsky@de.ibm.com>.
476 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
477 of functions for Linux/IA-64.
479 * The RPC code is now thread safe. Threads can now use the same service
480 of different services at the same time. Patch by Eric Norum
481 <eric.norum@usask.ca> with some help by Ulrich Drepper.
483 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
484 family of functions for Linux/S390.
486 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
487 of functions for Linux/x86.
489 * Port to Linux/CRIS contributed by Axis Communications.
490 \f
491 Version 2.2.2
493 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
494 we can now check for namespace violations and missing declarations. The
495 result is that almost all headers are now Unix-compliant (as defined in
496 the upcoming XPG6). The negative side is that some programs might need
497 corrections, too, if they depend on the incorrect form of the headers in
498 previous versions which defined too many symbols and included too many
499 other headers.
501 * regex now handles multibyte character sets correctly.
502 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
504 * iconv (the program) does now conform to the upcoming XPG6 and handles
505 charmaps. Instead of the charset names the path of charmaps can be
506 provided and the conversion happens based on this data.
507 Contributed by Ulrich Drepper.
509 * The locale program now provides detailed information about the installed
510 locales. While
512 locale -a
514 only lists the names of the supported locales
516 locale -a --verbose
518 provides details such as country, language, and codeset name.
519 Contributed by Ulrich Drepper.
520 \f
521 Version 2.2.1
523 * The gencat program now parses the input file according to the charset
524 selected by the LC_CTYPE category. This is important for stateful
525 character sets. To make generating catalogs easier there is a way
526 to overwrite the charset selected by the locale: before the first
527 message or $ quote line the catalog can contain a line like
529 $ codeset=ISO-8859-2
531 to select the charset (ISO-8859-2 in this case).
533 Implemented by Shinya Hanataka and Ulrich Drepper.
535 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
536 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
537 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
539 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
540 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
542 * The LANGUAGE environment variable is now ignored unless the locale is
543 changed from the default "C" locale.
545 * The usual bug fixes.
546 \f
547 Version 2.2
549 * Greg McGary added runtime support for bounds checking using gcc's
550 new -fbounded-pointers option. ix86 target is complete. PowerPC
551 is in progress.
553 * Thorsten Kukuk added secure mode support to nscd.
555 * The Berkeley db libraries have been removed.
557 Related, the nss_db module is now in a separate package since it
558 obviously requires a database library being available.
560 * Wide character I/O streams implemented by Ulrich Drepper.
562 * Functions from the extended socket API added by Ulrich Drepper.
564 * Functions feenableexcept and fedisableexcept to control the
565 behaviour of individual exceptions have been added by Andreas Jaeger.
567 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
569 * The resolver code has been updated from bind 8.2.3-T5B which supports
570 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
571 and Mark Kettenis.
573 This change could in some situations effect backward compatibility. Since
574 now `_res' is a thread-local instead of a global variable, modifying it
575 in one thread does not have any effect in other threads.
577 The resolver library was also extended to allow IPv6 as the transport
578 protocol for the requests. This work was done by Stig Venaas.
580 * Compatibility code for K&R C compilers has been removed from the
581 header files. A ISO C compiler is needed to use the library
582 (conforming to either C89 or C99 standard).
584 * Complete rewrite of the localedef program to support multibyte character
585 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
586 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
587 Implemented by Ulrich Drepper.
589 Bruno Haible significantly improved the generation and use of the data
590 structures for the wide character tables.
592 * Plural handling in gettext implemented by Ulrich Drepper.
594 * The utmp daemon has been removed.
596 * The port to MIPS-Linux has been finished by Andreas Jaeger.
598 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
599 and Yutaka Niibe.
601 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
603 * POSIX barriers implemented by Kaz Kylheku.
605 * POSIX spawn function family implemented by Ulrich Drepper.
607 * POSIX spinlocks are now available.
609 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
611 * the configure option --enable-kernel=X.Y.Z allows to strip out
612 compatibility for kernel versions before X.Y.Z. This is currently only
613 implemented for Linux.
615 * the sockaddr_in6 structure changed. The IPv6 working group added a new
616 field sin6_scope_id. This means that all programs using IPv6 should be
617 recompiled. Don't expect binary compatibility with previous glibc
618 versions.
620 * various conversion modules for IBM character sets contributed by
621 Masahide Washizawa.
623 * IA-64 port by Jes Sorensen and HJ Lu.
625 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
626 Compiling the GNU C Library for Linux/ia64
627 ******************************************
629 Please refer to the file INSTALL in the same directory as you found
630 this file for general information about configuring and compiling
631 glibc.
633 For general inquiries about glibc under Linux/ia64 please use the
634 following mailing list linux-ia64@linuxia64.org or one of the relevant
635 glibc mailing lists.
637 Recommended Tools for Compilation
638 =================================
640 In order for glibc-2.2 to build correctly on the ia64 you need at
641 least the following versions of the GNU tools (the :
643 * The Cygnus toolchain snapshot for the ia64 as of August 4
644 including the provided set of patches. It is however recommend
645 you use the October 24 toolchain snapshot or a more recent version.
647 OR alternatively you can try the following (the Cygnus toolchain is
648 the recommended solution):
650 * GCC and binutils, GAS and GNU LD out of CVS from
651 sources.redhat.com as of August 28, 2000 or later. The CVS tree
652 may require special patches to work properly on the ia64.
654 Configuring and compiling GNU Libc for Linux/ia64
655 =================================================
657 The library requires Linux kernel version 2.4.0-test4-000728 or
658 later to funtion properly. Besides that it support for debug libraries
659 is currently untested. Hence the following options
660 are required for configuring the library:
662 --disable-debug --enable-kernel=2.4.0
664 It is also important that you make sure the library picks up the
665 appropriate kernel header files, if you do not have recent enough
666 kernel headers in /usr/src/linux/include, you should use the
667 --with-headers=<path> option to specify the location.
669 As an example I personally use the following options to configure
670 the library:
672 --disable-debug
673 --disable-cvs
674 --enable-kernel=2.4.0
675 --host=ia64-linux
676 --enable-add-ons=yes
677 --prefix=/usr
678 --with-headers=/home/jes/linux/include
681 Good luck
683 Jes Sorensen <jes@linuxcare.com>,
684 November 14th, 2000
685 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
686 \f
687 Version 2.1.3
689 * bug fixes
691 \f
692 Version 2.1.2
694 * bug fixes
696 \f
697 Version 2.1.1
699 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
701 * New xdr functions are added; some rpc functions are now 64bit clean.
703 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
705 * Fixed known incompatibilities with glibc 2.0.
707 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
709 * Optimized a number of functions (especially the ELF dynamic loader).
711 * Update timezone data files.
713 * lots of charmaps corrections
715 * some new locale definitions and charmaps
717 \f
718 Version 2.1
720 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
721 conform to POSIX member type requirements. Symbol versions have been
722 adjusted as needed within the library, and for direct use by applications,
723 but there is potential for problems if third-party libraries use
724 struct timeval as part of their interface. This does not present
725 a problem for X and other "essential" system libraries.
727 * An additional locale model to support C++ Standard Library locale
728 model and probably more was implemented by Ulrich Drepper.
730 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
731 symbol level.
733 * Miles Bader provided the `argp' function family to support hierachical
734 command line argument parsing, layered on top of getopt.
736 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
738 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
739 numbers.
741 * scanf recognizes the %a and %A format for scanning floating point numbers.
743 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
744 information and interfaces for the available integer types.
746 * about 130 new math functions were added to implement the ISO C9x math
747 library.
749 * the new header <complex.h> contains definitions of the complex math
750 functions from ISO C 9X.
752 * the new header <tgmath.h> defines generic macros to use complex or
753 real valued functions.
755 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
757 * Andreas Jaeger provided a test suite for the math library.
759 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
761 * Ulrich Drepper added character set conversion functions (iconv).
763 * Optimized string functions have been added.
765 * The localedata addon is now part of glibc.
767 * An implementation of profiling shared libraries was added by Ulrich Drepper.
769 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
770 daemon for NSS (nscd).
772 Missing a better place here are some numbers on improvements. Under
773 Linux 2.1.125 un-tar-ing the kernel sources takes
775 user system wall
777 using local files 12.19s 6.88s 22.91s
779 using NIS 13.92s 8.91s 26.34s
781 using NIS & nscd 10.37s 7.34s 25.30s
783 using NIS+ 27.57s 30.37s 640.46s
785 using NIS+ & nscd 10.25s 7.83s 26.51s
787 using NIS & old nscd [1] 13.83s 8.32s 29.60s
789 Keep in mind that non-namelookup related operations dominate above times.
790 It was just a common complain that using NIS+ unpacking the kernel is
791 horribly slow.
793 [1] The old nscd implementation is not available anymore since it was
794 distributed with glibc up to version 2.0.98 and thus is now replaced.
796 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
798 * Mark Kettenis provided a Hesiod NSS module.
800 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
801 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
803 * rcmd can now handle netgroups (Dick Streefland).
805 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
806 Bambrough.
808 * Support for the IPv6 protocol has been added to the socket API, as per the
809 latest draft standards.
811 * Support for Linux 2.2 has been added.
813 * Interface changes relative to the latest 2.0.x release:
814 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
815 addseverity NEW: Unix98
816 alphasort64 NEW: LFS
817 argp_err_exit_status NEW: argp, GNU ext
818 argp_error NEW: argp, GNU ext
819 argp_failure NEW: argp, GNU ext
820 argp_help NEW: argp, GNU ext
821 argp_parse NEW: argp, GNU ext
822 argp_program_bug_address NEW: argp, GNU ext
823 argp_program_version NEW: argp, GNU ext
824 argp_program_version_hook NEW: argp, GNU ext
825 argp_state_help NEW: argp, GNU ext
826 argp_usage NEW: argp, GNU ext
827 authdes_create NEW: Secure RPC
828 authdes_getucred NEW: Secure RPC
829 authdes_pk_create NEW: Secure RPC
830 backtrace NEW: GNU ext.
831 backtrace_symbols NEW: GNU ext.
832 backtrace_symbols_fd NEW: GNU ext.
833 cacos NEW: ISO C 9x
834 cacosf NEW: ISO C 9x
835 cacosh NEW: ISO C 9x
836 cacoshf NEW: ISO C 9x
837 cacoshl NEW: ISO C 9x
838 cacosl NEW: ISO C 9x
839 capget NEW: kernel
840 capset NEW: kernel
841 carg NEW: ISO C 9x
842 cargf NEW: ISO C 9x
843 cargl NEW: ISO C 9x
844 casin NEW: ISO C 9x
845 casinf NEW: ISO C 9x
846 casinh NEW: ISO C 9x
847 casinhf NEW: ISO C 9x
848 casinhl NEW: ISO C 9x
849 casinl NEW: ISO C 9x
850 catan NEW: ISO C 9x
851 catanf NEW: ISO C 9x
852 catanh NEW: ISO C 9x
853 catanhf NEW: ISO C 9x
854 catanhl NEW: ISO C 9x
855 catanl NEW: ISO C 9x
856 cbc_crypt NEW: Secure RPC
857 ccos NEW: ISO C 9x
858 ccosf NEW: ISO C 9x
859 ccosh NEW: ISO C 9x
860 ccoshf NEW: ISO C 9x
861 ccoshl NEW: ISO C 9x
862 ccosl NEW: ISO C 9x
863 cexp NEW: ISO C 9x
864 cexpf NEW: ISO C 9x
865 cexpl NEW: ISO C 9x
866 cimag NEW: ISO C 9x
867 cimagf NEW: ISO C 9x
868 cimagl NEW: ISO C 9x
869 clearerr_locked REMOVED
870 clntunix_create NEW: sunrpc ext
871 clog NEW: ISO C 9x
872 clog10 NEW: ISO C 9x
873 clog10f NEW: ISO C 9x
874 clog10l NEW: ISO C 9x
875 clogf NEW: ISO C 9x
876 clogl NEW: ISO C 9x
877 conj NEW: ISO C 9x
878 conjf NEW: ISO C 9x
879 conjl NEW: ISO C 9x
880 cpow NEW: ISO C 9x
881 cpowf NEW: ISO C 9x
882 cpowl NEW: ISO C 9x
883 cproj NEW: ISO C 9x
884 cprojf NEW: ISO C 9x
885 cprojl NEW: ISO C 9x
886 creal NEW: ISO C 9x
887 crealf NEW: ISO C 9x
888 creall NEW: ISO C 9x
889 creat64 NEW: LFS
890 csin NEW: ISO C 9x
891 csinf NEW: ISO C 9x
892 csinh NEW: ISO C 9x
893 csinhf NEW: ISO C 9x
894 csinhl NEW: ISO C 9x
895 csinl NEW: ISO C 9x
896 csqrt NEW: ISO C 9x
897 csqrtf NEW: ISO C 9x
898 csqrtl NEW: ISO C 9x
899 ctan NEW: ISO C 9x
900 ctanf NEW: ISO C 9x
901 ctanh NEW: ISO C 9x
902 ctanhf NEW: ISO C 9x
903 ctanhl NEW: ISO C 9x
904 ctanl NEW: ISO C 9x
905 des_setparity NEW: Secure RPC
906 ecb_crypt NEW: Secure RPC
907 endutxent NEW: Unix98
908 exp10 NEW: ISO C 9x
909 exp10f NEW: ISO C 9x
910 exp10l NEW: ISO C 9x
911 exp2 NEW: ISO C 9x
912 exp2f NEW: ISO C 9x
913 exp2l NEW: ISO C 9x
914 fattach NEW: STREAMS
915 fdetach NEW: STREAMS
916 fdim NEW: ISO C 9x
917 fdimf NEW: ISO C 9x
918 fdiml NEW: ISO C 9x
919 feclearexcept NEW: ISO C 9x
920 fegetenv NEW: ISO C 9x
921 fegetexceptflag NEW: ISO C 9x
922 fegetround NEW: ISO C 9x
923 feholdexcept NEW: ISO C 9x
924 feof_locked REMOVED
925 feraiseexcept NEW: ISO C 9x
926 ferror_locked REMOVED
927 fesetenv NEW: ISO C 9x
928 fesetexceptflag NEW: ISO C 9x
929 fesetround NEW: ISO C 9x
930 fetestexcept NEW: ISO C 9x
931 feupdateenv NEW: ISO C 9x
932 fflush_locked REMOVED
933 ffsl NEW: GNU ext.
934 ffsll NEW: GNU ext.
935 fgetpos64 NEW: LFS
936 fgets_unlocked NEW: GNU ext.
937 fileno_locked REMOVED
938 fma NEW: ISO C 9x
939 fmaf NEW: ISO C 9x
940 fmal NEW: ISO C 9x
941 fmax NEW: ISO C 9x
942 fmaxf NEW: ISO C 9x
943 fmaxl NEW: ISO C 9x
944 fmin NEW: ISO C 9x
945 fminf NEW: ISO C 9x
946 fminl NEW: ISO C 9x
947 fmtmsg NEW: Unix98
948 fopen64 NEW: LFS
949 fputc_locked REMOVED
950 fputs_unlocked NEW: GNU ext.
951 fread_unlocked NEW: GNU ext.
952 freopen64 NEW: LFS
953 fseeko NEW: Unix98
954 fsetpos64 NEW: LFS
955 fstatfs64 NEW: LFS
956 fstatvfs NEW: Unix98
957 fstatvfs64 NEW: LFS
958 ftello NEW: Unix98
959 ftello64 NEW: LFS
960 ftruncate64 NEW: LFS
961 ftw64 NEW: LFS
962 fwrite_unlocked NEW: GNU ext.
963 gai_strerror NEW: IPv6
964 gamma_r REMOVED
965 gammaf_r REMOVED
966 gammal_r REMOVED
967 getchar_locked REMOVED
968 getdate NEW: Unix98
969 getdate_err NEW: Unix98
970 getdate_r NEW: GNU ext.
971 getmsg NEW: STREAMS
972 getnameinfo NEW: IPv6
973 getnetname NEW: Secure RPC
974 getpmsg NEW: STREAMS
975 getpt NEW: Unix98 PTY
976 getrlimit64 NEW: LFS
977 getutxent NEW: Unix98
978 getutxid NEW: Unix98
979 getutxline NEW: Unix98
980 glob64 NEW: GNU ext.
981 globfree64 NEW: GNU ext.
982 gnu_get_libc_release NEW: GNU ext.
983 gnu_get_libc_version NEW: GNU ext.
984 grantpt NEW: Unix98 PTY
985 host2netname NEW: Secure RPC
986 iconv NEW: iconv
987 iconv_close NEW: iconv
988 iconv_open NEW: iconv
989 if_freenameindex NEW: IPv6
990 if_indextoname NEW: IPv6
991 if_nameindex NEW: IPv6
992 if_nametoindex NEW: IPv6
993 in6addr_any NEW: IPv6
994 in6addr_loopback NEW: IPv6
995 inet6_isipv4mapped NEW: IPv6
996 isastream NEW: STREAMS
997 iswblank NEW: GNU ext.
998 key_decryptsession NEW: Secure RPC
999 key_decryptsession_pk NEW: Secure RPC
1000 key_encryptsession NEW: Secure RPC
1001 key_encryptsession_pk NEW: Secure RPC
1002 key_gendes NEW: Secure RPC
1003 key_get_conv NEW: Secure RPC
1004 key_secretkey_is_set NEW: Secure RPC
1005 key_setnet NEW: Secure RPC
1006 key_setsecret NEW: Secure RPC
1007 llrint NEW: ISO C 9x
1008 llrintf NEW: ISO C 9x
1009 llrintl NEW: ISO C 9x
1010 llround NEW: ISO C 9x
1011 llroundf NEW: ISO C 9x
1012 llroundl NEW: ISO C 9x
1013 log2 NEW: ISO C 9x
1014 log2f NEW: ISO C 9x
1015 log2l NEW: ISO C 9x
1016 lrint NEW: ISO C 9x
1017 lrintf NEW: ISO C 9x
1018 lrintl NEW: ISO C 9x
1019 lround NEW: ISO C 9x
1020 lroundf NEW: ISO C 9x
1021 lroundl NEW: ISO C 9x
1022 lseek64 NEW: LFS
1023 makecontext NEW: Unix98
1024 mempcpy NEW: GNU ext.
1025 mmap64 NEW: LFS
1026 moncontrol REMOVED
1027 modify_ldt NEW: kernel
1028 nan NEW: ISO C 9x
1029 nanf NEW: ISO C 9x
1030 nanl NEW: ISO C 9x
1031 nearbyint NEW: ISO C 9x
1032 nearbyintf NEW: ISO C 9x
1033 nearbyintl NEW: ISO C 9x
1034 netname2host NEW: Secure RPC
1035 netname2user NEW: Secure RPC
1036 nexttoward NEW: ISO C 9x
1037 nexttowardf NEW: ISO C 9x
1038 nexttowardl NEW: ISO C 9x
1039 nftw NEW: Unix98
1040 nftw64 NEW: LFS
1041 open64 NEW: LFS
1042 passwd2des NEW: Secure RPC
1043 pow10 NEW: GNU ext.
1044 pow10f NEW: GNU ext.
1045 pow10l NEW: GNU ext.
1046 pread NEW: Unix98
1047 pread64 NEW: LFS
1048 printf_size NEW: GNU ext.
1049 printf_size_info NEW: GNU ext.
1050 profil_counter REMOVED
1051 pthread_mutexattr_getkind_np REPLACED
1052 pthread_mutexattr_setkind_np REPLACED
1053 ptsname NEW: Unix98 PTY
1054 ptsname_r NEW: Unix98 PTY
1055 putc_locked REMOVED
1056 putchar_locked REMOVED
1057 putgrent NEW: GNU ext.
1058 putmsg NEW: STREAMS
1059 putpmsg NEW: STREAMS
1060 pututxline NEW: Unix98
1061 pwrite NEW: Unix98
1062 pwrite64 NEW: LFS
1063 readdir64 NEW: LFS
1064 readdir64_r NEW: LFS
1065 remquo NEW: ISO C 9x
1066 remquof NEW: ISO C 9x
1067 remquol NEW: ISO C 9x
1068 round NEW: ISO C 9x
1069 roundf NEW: ISO C 9x
1070 roundl NEW: ISO C 9x
1071 rtime NEW: GNU ext.
1072 scalbln NEW: ISO C 9x
1073 scalblnf NEW: ISO C 9x
1074 scalblnl NEW: ISO C 9x
1075 scandir64 NEW: LFS
1076 sendfile NEW: kernel
1077 setcontext NEW: Unix98
1078 setrlimit64 NEW: LFS
1079 setutxent NEW: Unix98
1080 sighold NEW: Unix98
1081 sigignore NEW: Unix98
1082 sigqueue NEW: POSIX.1b
1083 sigrelse NEW: Unix98
1084 sigset NEW: POSIX.1b
1085 sigtimedwait NEW: POSIX.1b
1086 sigwaitinfo NEW: POSIX.1b
1087 sincos NEW: GNU ext.
1088 sincosf NEW: GNU ext.
1089 sincosl NEW: GNU ext.
1090 statfs64 NEW: LFS
1091 statvfs NEW: Unix98
1092 statvfs64 NEW: LFS
1093 strcasestr NEW: GNU ext.
1094 strtoimax NEW: ISO C 9x
1095 strtoumax NEW: ISO C 9x
1096 strverscmp NEW: GNU ext.
1097 svcauthdes_stats NEW: Secure RPC
1098 svcunix_create NEW: sunrpc etx
1099 svcunixfd_create NEW: sunrpc ext
1100 swapcontext NEW: Unix98
1101 tcgetsid NEW: Unix98 PTY
1102 tdestroy NEW: GNU ext.
1103 tgamma NEW: ISO C 9x
1104 tgammaf NEW: ISO C 9x
1105 tgammal NEW: ISO C 9x
1106 tmpfile64 NEW: LFS
1107 trunc NEW: ISO C 9x
1108 truncate64 NEW: LFS
1109 truncf NEW: ISO C 9x
1110 truncl NEW: ISO C 9x
1111 umount2 NEW: kernel
1112 unlockpt NEW: Unix98 PTY
1113 updwtmpx NEW: Unix98
1114 user2netname NEW: Secure RPC
1115 utmpxname NEW: Unix98
1116 versionsort NEW: GNU ext.
1117 versionsort64 NEW: GNU ext.
1118 waitid NEW: Unix98
1119 wcscasecmp NEW: GNU ext.
1120 wcsncasecmp NEW: GNU ext.
1121 wcsnlen NEW: GNU ext.
1122 wcstoimax NEW: ISO C 9x
1123 wcstoll NEW: ISO C 9x
1124 wcstoull NEW: ISO C 9x
1125 wcstoumax NEW: ISO C 9x
1126 wcswcs NEW: Unix98
1127 wordexp NEW: POSIX.2
1128 wordfree NEW: POSIX.2
1129 write_profiling REMOVED
1130 xdecrypt NEW: Secure RPC
1131 xdr_authdes_cred NEW: Secure RPC
1132 xdr_authdes_verf NEW: Secure RPC
1133 xdr_cryptkeyarg NEW: Secure RPC
1134 xdr_cryptkeyarg2 NEW: Secure RPC
1135 xdr_cryptkeyres NEW: Secure RPC
1136 xdr_getcredres NEW: Secure RPC
1137 xdr_key_netstarg NEW: Secure RPC
1138 xdr_key_netstres NEW: Secure RPC
1139 xdr_keybuf NEW: Secure RPC
1140 xdr_keystatus NEW: Secure RPC
1141 xdr_netnamestr NEW: Secure RPC
1142 xdr_sizeof NEW: Secure RPC
1143 xdr_unixcred NEW: sunrpc ext
1144 xencrypt NEW: Secure RPC
1145 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1146 \f
1147 Version 2.0.6
1149 * more bug fixes
1151 \f
1152 Version 2.0.5
1154 * more bug fixes
1156 * inet_ntoa is thread-safe
1158 * updwtmp is moved from libutil to libc
1160 * rewrite of cbrt function
1162 * update of timezone data
1163 \f
1164 Version 2.0.4
1166 * more bug fixes
1167 \f
1168 Version 2.0.3
1170 * more bug fixes
1171 \f
1172 Version 2.0.2
1174 * more bug fixes
1176 * add atoll function
1178 * fix complex problems in Berkeley DB code
1180 * fix math functions
1181 \f
1182 Version 2.0.1
1184 * fixed lots of header problems (especially Linux/GNU specific)
1186 * dynamic loader preserves all registers
1188 * Roland McGrath provided support for handling of auxiliary objects in
1189 the ELF dynamic loader.
1191 * support for parallel builds is improved
1192 \f
1193 Version 2.0
1195 * GNU extensions are no longer declared by default. To enable them you
1196 must define the macro `_GNU_SOURCE' in your program or compile with
1197 `-D_GNU_SOURCE'.
1199 * The library has changed from using GNU ld symbol aliases to using weak
1200 symbols where available. The ELF object file format supports weak
1201 symbols; GNU ld also supports weak symbols in the a.out format. (There
1202 is also now support for other GNU ld extensions in ELF. Use the
1203 `--with-elf' option to configure to indicate you have ELF, and
1204 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
1205 of many files which contained only symbol aliases, reducing the size of
1206 the source and the compiled library; many other files were renamed to
1207 less cryptic names previously occupied by the symbol alias files.
1208 There is a new header file <elf.h> for programs which operate on
1209 files in the ELF format.
1211 * Converted to Autoconf version 2, so `configure' has more options.
1212 Run `configure --help' to see the details.
1214 * The library can now be configured to build profiling, highly-optimized
1215 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
1216 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
1217 `configure' enable building these extra libraries. The shared library is
1218 built by default when using both ELF and GNU ld. When shared libraries
1219 are enabled, the new library `-ldl' is available for arbitrary run-time
1220 loading of shared objects; its interface is defined in <dlfcn.h>. The
1221 new header file <link.h> gives access to the internals of the run-time
1222 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
1223 application of same name on other systems and it provides information
1224 about dynamically linked binaries.
1226 * The C library now provides the run-time support code for profiling
1227 executables compiled with `-pg'. Programs can control the profiling code
1228 through the interface in <sys/gmon.h>. The `gmon.out' files written by
1229 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
1230 the support for this file format was contributed by David Mosberger-Tang.
1232 * The math code has been replaced with a math library based on fdlibm from
1233 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
1234 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
1235 functions. The math functions now reside in a separate library, so
1236 programs using them will need to use `-lm' their linking commands.
1238 * John C. Bowman contributed optimized ix87 assembler inline functions.
1240 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
1241 mechanism similar to that found in Solaris 2. This is now used for the
1242 group, passwd, hosts, networks, services, protocols, rpc, ethers,
1243 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
1244 file controls what services are used for each individual database. This
1245 works by loading shared libraries with names specified in `nsswitch.conf',
1246 so service modules can be changed or added at any time without even
1247 relinking any program. Currently there are the file, db, and NIS based
1248 NSS services available.
1250 * The new functions `strtoq' and `strtouq' parse integer values from
1251 strings, like `strtol' and `strtoul', but they return `long long int' and
1252 `unsigned long long int' values, respectively (64-bit quantities).
1254 * The new functions `strtof' and `strtold' parse floating-point values from
1255 strings, like `strtod', but they return `float' and `long double' values,
1256 respectively (on some machines `double' and `long double' are the same).
1258 * Ulrich Drepper has contributed new implementations of the floating-point
1259 printing and reading code used in the `printf' family of functions and
1260 `strtod', `strtof', and `strtold'. These new functions are perfectly
1261 accurate, and much faster than the old ones.
1263 * The implementation of the POSIX locale model was completely rewritten by
1264 Ulrich Drepper. This includes the new programs `localedef' and `locale'
1265 to compile the POSIX locale definition.
1267 * The former dummy implementations of the strcoll and strxfrm function are
1268 now replaced by fully functional code contributed by Ulrich Drepper. The
1269 collation information comes from the POSIX locale definitions.
1271 * The new header <langinfo.h> defines an interface for accessing
1272 various locale-dependent data (using the locale chosen with `setlocale').
1274 * Ulrich Drepper has contributed a new suite of functions for operation on
1275 wide-character and multibyte-character strings, in <wchar.h>;
1276 and classification and case conversion of wide characters, in <wctype.h>.
1277 These new functions are conforming to the ISO C, Amendement 1 specification.
1279 * There is now a second implementation of the standard I/O library available.
1280 It comes from GNU libg++ as was written by Per Bothner, heavily modified
1281 by Hongjiu Lu and made thread safe by Ulrich Drepper.
1283 * You can now use positional parameter specifications in format strings
1284 for the `printf' and `scanf' families of functions. For example,
1285 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
1286 ``Number 6, Mr Jones''. This is mainly useful when providing different
1287 format strings for different languages, whose grammars may dictate
1288 different orderings of the values being printed. To support this
1289 feature, the interface for `register_printf_handler' has changed; see
1290 the header file <printf.h> for details.
1292 * The `printf' and `scanf' families of functions now understand a new
1293 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
1294 to group numbers as indicated by the locale; for `scanf' and friends, this
1295 says to accept as valid only a number with all the proper grouping
1296 separators in the right places. In the default "C" locale, numbers are
1297 not grouped; but locales for specific countries will define the usual
1298 conventions (i.e. separate thousands with `,' in the US locale).
1300 * The pgrp functions have been regularized, slightly incompatibly but much
1301 less confusingly. The core functions are now `getpgid' and `setpgid',
1302 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
1303 argument) and BSD `setpgrp' (identical to `setpgid') functions are
1304 provided for compatibility. There is no longer an incompatible `getpgrp'
1305 with an argument declared under _BSD_SOURCE; no BSD code uses it.
1307 * The new header file <fts.h> and suite of functions simplify programs that
1308 operate on directory trees. This code comes from 4.4 BSD.
1310 * The resolver code has been updated from the BIND 4.9.5-P1 release.
1311 Parts of the code were heavily modified by Ulrich Drepper to fit in the
1312 NSS scheme used in glibc.
1314 * There is a new malloc debugging hook `__memalign_hook'.
1316 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
1317 `unsigned int' in <sys/types.h>. These are for compatibility only and
1318 their use is discouraged.
1320 * The `-lmcheck' library to enable standard malloc debugging hooks is now
1321 done differently, so that it works even without GNU ld.
1323 * New function `euidaccess' checks allowed access to a file like `access',
1324 but using the effective IDs instead of the real IDs.
1326 * The time zone data files have been updated for the latest and greatest
1327 local time conventions of the countries of the world.
1329 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
1330 see <dirent.h>.
1332 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
1333 for formatting floating-point numbers. They are provided only for
1334 compatibility; new programs should use `sprintf' instead. There are
1335 also equivalent function for the `long double' floating-point type and
1336 all functions also exist in a reentrant form.
1338 * The new auxiliary library `-lutil' from 4.4 BSD contains various
1339 functions for maintaining the login-record files (primarily of use to
1340 system programs such as `login'), and convenient functions for
1341 allocating and initializing a pseudo-terminal (pty) device.
1343 * Ulrich Drepper has contributed new support for System V style
1344 shared memory and IPC on systems that support it.
1346 * Ulrich Drepper has contributed several miscellaneous new functions found
1347 in System V: The `hsearch' family of functions provide an effective
1348 implementation of hash tables; `a64l' and `l64a' provide a very simple
1349 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
1350 number generator.
1352 * Ulrich Drepper has contributed new reentrant counterparts for the
1353 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
1355 * Ulrich Drepper has contributed new, highly-optimized versions of several
1356 string functions for the i486/Pentium family of processors.
1358 * Ulrich Drepper has updated the Linux-specific code, based largely
1359 on work done in Hongjiu Lu's version of GNU libc for Linux.
1360 The GNU library now supports Linux versions 2.0.10 and later,
1361 using the ELF object file format (i[3456]86-*-linux).
1363 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
1365 * David Mosberger-Tang and Richard Henderson have ported the C library
1366 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
1367 dynamic linking support for ELF/Alpha.
1369 * Richard Henderson contributed several Alpha optimized assembler function
1370 for arithmetic and string handling.
1372 * Ulrich Drepper has contributed a new set of message catalog functions to
1373 support multiple languages using the <libintl.h> interface, for use with
1374 his new package GNU gettext. Translation volunteers have contributed
1375 catalogs of the library's messages in Spanish, German, and Korean.
1377 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
1378 program and the `catgets' function for reading the catalog files it
1379 creates. (The <libintl.h> interface is preferred; we include the
1380 <nl_types.h> interface using `catgets' only for source compatibility with
1381 programs already written to use it.)
1383 * New header file <values.h> gives SVID-compatible names for <limits.h>
1384 constants.
1386 * Various new macros, declarations, and small header files for compatibility
1387 with 4.4 BSD.
1389 * New function `group_member' is a convenient way to check if a process has
1390 a given effective group ID.
1392 * When using GCC 2.7 and later, the socket functions are now declared in a
1393 special way so that passing an argument of type `struct sockaddr_in *',
1394 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
1395 `struct sockaddr *' type, does not generate a type-clash warning.
1397 * New function `error' declared in header file <error.h> is a convenient
1398 function for printing error messages and optionally exiting; this is the
1399 canonical function used in GNU programs. The new functions `err', `warn',
1400 and friends in header file <err.h> are the canonical 4.4 BSD interface for
1401 doing the same thing.
1403 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
1404 POSIX.2 `glob' function to do ~ and {...} expansion.
1406 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
1407 `clearenv' which is used in POSIX.9 is also available.
1409 * New function `getsid' returns session ID number on systems that support it.
1411 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
1412 files <db.h> and <mpool.h> provide a rich set of functions for several
1413 types of simple databases stored in memory and in files, and <ndbm.h> is
1414 an old `ndbm'-compatible interface using the `db' functions. Link with
1415 `-ldb' to get these functions.
1417 * New macro `strdupa' copies a string like `strdup', but uses local stack
1418 space from `alloca' instead of dynamic heap space from `malloc'.
1420 * New function `strnlen' is like `strlen' but searches only a given maximum
1421 number of characters for the null terminator. `stpncpy', `strndup' and
1422 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
1423 function.
1425 * New function `statfs' in header <sys/statfs.h>.
1427 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
1428 provide convenient functions for operating on blocks of null-terminated
1429 strings.
1431 * A new suite of functions in <utmp.h> handle all the details of reading
1432 and writing the utmp file.
1434 * An implementation of the NIS/YP(tm) based NSS service was contributed by
1435 Thorsten Kukuk.
1437 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
1438 completely POSIX compliant and also implemented the extended functionality
1439 to handle alternate digit representation and alternate era date formats.
1441 * Ulrich Drepper provided an implementation of the `strptime' function
1442 defined in XPG4.2 which transforms a string into a `struct tm' value.
1444 * Paul Eggert provided the tzselect shell script as part of the timezone
1445 code. The shell script makes it easy to select the correct timezone
1446 specification.
1448 * The implementation of the malloc family of functions is completely replaced
1449 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
1450 The implementation uses the mmap function (if available) and it is
1451 optimized for the use in multi threaded programs.
1453 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
1454 functions. This new functionality is usable by specifying a special
1455 salt string and it is compatible with implementation on *BSD systems.
1457 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
1458 `getsubopt' to handle second level command line options, `bsd_signal'
1459 to access BSD style `signal' functionality, the obsolete `regexp' style
1460 expression matcher.
1462 * the `lchown' function is available on system which support this
1463 functionality.
1465 * The implementation of the shadow password handling function was contributed
1466 by Ulrich Drepper.
1468 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
1470 * POSIX.1g support was added. The <sys/select.h> header is available,
1471 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
1472 implementation of `getaddrinfo'.
1473 \f
1474 Version 1.09
1476 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
1478 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
1479 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
1481 * The new function `daemon' from 4.4 BSD is useful for server programs that
1482 want to put themselves in the background.
1484 * Joel Sherrill has contributed support for several standalone boards that
1485 run without an operating system.
1487 * `printf', `scanf' and friends now accept a `q' type modifier for long
1488 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
1490 * All of the code taken from BSD (notably most of the math and networking
1491 routines) has been updated from the BSD 4.4-Lite release.
1493 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
1495 * The new functions `getdomainname' and `setdomainname' fetch or change the
1496 YP/NIS domain name. These are system calls which exist on systems which
1497 have YP (aka NIS).
1499 * The time zone data files have been updated for the latest international
1500 conventions.
1502 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
1503 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
1504 \f
1505 Version 1.08
1507 * The C library now includes support for Sun RPC, from Sun's free
1508 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
1509 are included. (There is still no support for YP.)
1511 * Tom Quinn has contributed a port of the C library to SGI machines running
1512 Irix 4 (mips-sgi-irix4).
1514 * The new `lockf' function is a simplified interface to the locking
1515 facilities of `fcntl', included for compatibility.
1517 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
1519 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
1521 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
1522 compatibility.
1524 * The error message printed by `assert' for a failed assertion now includes
1525 the name of the program (if using GNU ld) and the name of the calling
1526 function (with versions of GCC that support this).
1528 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
1530 * The library now includes the <sys/mman.h> header file and memory
1531 management functions `mmap', `munmap', `mprotect', `msync', and
1532 `madvise', on systems that support those facilities.
1534 * The interface for `mcheck' has changed slightly: the function called to
1535 abort the program when an allocation inconsistency is detected now takes
1536 an argument that indicates the type of failure. The new function
1537 `mprobe' lets you request a consistency check for a particular block at
1538 any time (checks are normally done only when you call `free' or `realloc'
1539 on a block).
1541 * It is now possible to easily cross-compile the C library, building on one
1542 system a library to run on another machine and/or operating system. All
1543 you need to do is set the variable `HOST_CC' in `configparms' to the
1544 native compiler for programs to run on the machine you are building on (a
1545 few generator programs are used on Unix systems); set `CC' to the
1546 cross-compiler.
1548 * The new function `fexecve' (only implemented on the GNU system) executes
1549 a program file given a file descriptor already open on the file.
1550 \f
1551 Version 1.07
1553 * Brendan Kehoe has contributed most of a port to the DEC Alpha
1554 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
1556 * You can set the variable `libprefix' in `configparms' to specify a prefix
1557 to be prepended to installed library files; this makes it easy to install
1558 the GNU C library to be linked as `-lgnuc' or whatever.
1560 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
1561 copies a limited number of characters from a string, and returns the
1562 address of the last character written.
1564 * You no longer need to check for whether the installed `stddef.h' is
1565 compatible with the GNU C library. configure now checks for you.
1567 * You can now define a per-stream `fileno' function to convert the
1568 stream's cookie into an integral file descriptor.
1570 * ``malloc (0)'' no longer returns a null pointer. Instead, it
1571 allocates zero bytes of storage, and returns a unique pointer which
1572 you can pass to `realloc' or `free'. The behavior is undefined if
1573 you dereference this pointer.
1575 * The C library now runs on Sony NEWS m68k machines running either
1576 NewsOS 3 or NewsOS 4.
1578 * The new `syscall' function is a system-dependent primitive function
1579 for invoking system calls. It has the canonical behavior on Unix
1580 systems, including unreliable return values for some calls (such as
1581 `pipe', `fork' and `getppid').
1583 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
1584 to `EAGAIN', which is the preferred name. On systems whose kernels
1585 use two distinct codes, the C library now translates EWOULDBLOCK to
1586 EAGAIN in every system call function.
1587 \f
1588 Version 1.06
1590 * The GNU C Library Reference Manual is now distributed with the library.
1591 `make dvi' will produce a DVI file of the printed manual.
1592 `make info' will produce Info files that you can read on line using C-h i
1593 in Emacs or the `info' program.
1594 Please send comments on the manual to bug-glibc-manual@gnu.org.
1596 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
1598 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
1600 * Jason Merrill has contributed a port to the Sequent Symmetry running
1601 Dynix version 3 (i386-sequent-dynix).
1603 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
1604 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
1606 * New function `memory_warnings' lets you arrange to get warnings when
1607 malloc is running out of memory to allocate, like Emacs gives you.
1609 * The C library now contains the relocating allocator used in Emacs 19 for
1610 its editing buffers. This allocator (ralloc) minimizes allocation
1611 overhead and fragmentation by moving allocated regions around whenever it
1612 needs to. You always refer to a ralloc'd region with a "handle" (a
1613 pointer to a pointer--an object of type `void **').
1615 * There is a new `printf' format: `%m' gives you the string corresponding
1616 to the error code in `errno'.
1618 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
1619 or `%[' conversion, but instead of filling in a fixed-sized buffer you
1620 pass, the `a' modifier says to fill in a `char **' you pass with a
1621 malloc'd string.
1623 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
1624 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
1625 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
1627 * `mkstemp' is a traditional Unix function to atomically create and open a
1628 uniquely-named temporary file.
1629 \f
1630 Version 1.05
1632 * The standard location for the file that says what the local timezone is
1633 has changed again. It is now `/usr/local/etc/localtime' (or more
1634 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
1636 * The distribution no longer contains any files with names longer than 14
1637 characters.
1639 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
1640 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
1642 * New functions `ttyslot' and `syslog' from 4.4 BSD.
1643 \f
1644 Version 1.04
1646 * The configuration process has changed quite a bit. The `configure'
1647 script is now used just like the configuration scripts for other GNU
1648 packages. The `sysdeps' directory hierarchy is much rearranged.
1649 The file `INSTALL' explains the new scheme in detail.
1651 * The header files no longer need to be processed into ANSI C and
1652 traditional C versions. There is just one set of files to install, and
1653 it will work with ANSI or old C compilers (including `gcc -traditional').
1655 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
1656 MIPS DECStation running Ultrix 4.
1658 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
1659 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
1660 made itself into a shared library.
1662 * Yet further improved support for the i386, running 4.3 BSD-like systems
1663 (such as Mach 3 with the Unix single-server), or System V.
1665 * New function `strncasecmp' to do case-insensitive string comparison
1666 with limited length.
1668 * New function `strsep' is a reentrant alternative to `strtok'.
1670 * New functions `scandir' and `alphasort' for searching directories.
1672 * New function `setenv' is a better interface to `putenv'.
1674 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
1675 function for traversing a directory tree.
1677 * The GNU obstack package is now also part of the C library.
1678 The new function `open_obstack_stream' creates a stdio stream that
1679 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
1680 formatted output directly to an obstack.
1682 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
1683 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
1685 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
1687 * The new functions `strfry' and `memfrob' do mysterious and wonderful
1688 things to your strings.
1690 * There are some new test programs: test-fseek, testmb, and testrand.
1692 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
1693 These ports are not finished, but are a good starting place for really
1694 supporting those systems.
1696 * `/etc/localtime' is now the standard location for the file that says what
1697 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
1698 This follows the general principle that `/etc' is the place for all local
1699 configuration files.
1701 * The C library header files now use `extern "C"' when used by the C++
1702 compiler, so the C library should now work with C++ code.
1704 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
1705 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
1706 in <strings.h>.)
1708 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
1709 function which uses the `merge sort' algorithm, and is said to be
1710 significantly faster than the old GNU `qsort' function. Merge sort is
1711 now the standard `qsort' function. The new algorithm can require a lot
1712 of temporary storage; so, the old sorting function is called when the
1713 required storage is not available.
1715 * The C library now includes Michael Glad's Ultra Fast Crypt, which
1716 provides the Unix `crypt' function, plus some other entry points.
1718 * The code and header files taken from 4.4 BSD have been updated with the
1719 latest files released from Berkeley.
1720 \f
1721 ----------------------------------------------------------------------
1722 Copyright information:
1724 Copyright (C) 1992-1999,2000,2001,2002,2003,2004,2005,2006
1725 Free Software Foundation, Inc.
1727 Permission is granted to anyone to make or distribute verbatim copies
1728 of this document as received, in any medium, provided that the
1729 copyright notice and this permission notice are preserved,
1730 thus giving the recipient permission to redistribute in turn.
1732 Permission is granted to distribute modified versions
1733 of this document, or of portions of it,
1734 under the above conditions, provided also that they
1735 carry prominent notices stating who last changed them.
1736 \f
1737 Local variables:
1738 version-control: never
1739 End: