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1 GNU C Library NEWS -- history of user-visible changes. 1998-03-04
3 Copyright (C) 1992, 93, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
4 See the end for copying conditions.
6 Please send GNU C library bug reports using the `glibcbug' script to
7 <bugs@gnu.org>. Questions and suggestions should be send to
8 <bug-glibc@gnu.org>.
9 \f
10 Version 2.1
12 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
13 conform to POSIX member type requirements. Symbol versions have been
14 adjusted as needed within the library, and for direct use by applications,
15 but there is potential for problems if third-party libraries use
16 struct timeval as part of their interface. This does not present
17 a problem for X and other "essential" system libraries.
19 * An additional locale model to support C++ Standard Library locale
20 model and probably more was implemented by Ulrich Drepper.
22 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
23 symbol level.
25 * Miles Bader provided the `argp' function family to support hierachical
26 command line argument parsing, layered on top of getopt.
28 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
30 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
31 numbers.
33 * scanf recognizes the %a and %A format for scanning floating point numbers.
35 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
36 information and interfaces for the available integer types.
38 * the new header <complex.h> contains definitions of the complex math
39 functions from ISO C 9X.
41 * the new header <tgmath.h> defines generic macros to use complex or
42 real valued functions.
44 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
46 * Andreas Jaeger provided a test suite for the math library.
48 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
50 * Ulrich Drepper added character conversion functions.
52 * Optimized string functions have been added.
54 * The localedata addon is now part of glibc.
56 * An implementation of profiling shared libraries was added by Ulrich Drepper.
58 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
59 daemon for NSS (nscd).
61 Missing a better place here are some numbers on improvements. Under
62 Linux 2.1.125 un-tar-ing the kernel sources takes
64 user system wall
66 using local files 12.19s 6.88s 22.91s
68 using NIS 13.92s 8.91s 26.34s
70 using NIS & nscd 10.37s 7.34s 25.30s
72 using NIS+ 27.57s 30.37s 640.46s
74 using NIS+ & nscd 10.25s 7.83s 26.51s
76 using NIS & old nscd [1] 13.83s 8.32s 29.60s
78 Keep in mind that non-namelookup related operations dominate above times.
79 It was just a common complain that using NIS+ unpacking the kernel is
80 horribly slow.
82 [1] The old nscd implementation is not available anymore since it was
83 distributed with glibc up to version 2.0.98 and thus is now replaced.
85 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
87 * Mark Kettenis provided a Hesiod NSS module.
89 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
90 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
92 * rcmd can now handle netgroups (Dick Streefland).
94 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
95 Bambrough.
97 * Support for the IPv6 protocol has been added to the socket API, as per the
98 latest draft standards.
100 * Interface changes relative to the latest 2.0.x release:
101 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
102 addseverity NEW: Unix98
103 alphasort64 NEW: LFS
104 argp_err_exit_status NEW: argp, GNU ext
105 argp_error NEW: argp, GNU ext
106 argp_failure NEW: argp, GNU ext
107 argp_help NEW: argp, GNU ext
108 argp_parse NEW: argp, GNU ext
109 argp_program_bug_address NEW: argp, GNU ext
110 argp_program_version NEW: argp, GNU ext
111 argp_program_version_hook NEW: argp, GNU ext
112 argp_state_help NEW: argp, GNU ext
113 argp_usage NEW: argp, GNU ext
114 authdes_create NEW: Secure RPC
115 authdes_getucred NEW: Secure RPC
116 authdes_pk_create NEW: Secure RPC
117 backtrace NEW: GNU ext.
118 backtrace_symbols NEW: GNU ext.
119 backtrace_symbols_fd NEW: GNU ext.
120 cacos NEW: ISO C 9x
121 cacosf NEW: ISO C 9x
122 cacosh NEW: ISO C 9x
123 cacoshf NEW: ISO C 9x
124 cacoshl NEW: ISO C 9x
125 cacosl NEW: ISO C 9x
126 capget NEW: kernel
127 capset NEW: kernel
128 carg NEW: ISO C 9x
129 cargf NEW: ISO C 9x
130 cargl NEW: ISO C 9x
131 casin NEW: ISO C 9x
132 casinf NEW: ISO C 9x
133 casinh NEW: ISO C 9x
134 casinhf NEW: ISO C 9x
135 casinhl NEW: ISO C 9x
136 casinl NEW: ISO C 9x
137 catan NEW: ISO C 9x
138 catanf NEW: ISO C 9x
139 catanh NEW: ISO C 9x
140 catanhf NEW: ISO C 9x
141 catanhl NEW: ISO C 9x
142 catanl NEW: ISO C 9x
143 cbc_crypt NEW: Secure RPC
144 ccos NEW: ISO C 9x
145 ccosf NEW: ISO C 9x
146 ccosh NEW: ISO C 9x
147 ccoshf NEW: ISO C 9x
148 ccoshl NEW: ISO C 9x
149 ccosl NEW: ISO C 9x
150 cexp NEW: ISO C 9x
151 cexpf NEW: ISO C 9x
152 cexpl NEW: ISO C 9x
153 cimag NEW: ISO C 9x
154 cimagf NEW: ISO C 9x
155 cimagl NEW: ISO C 9x
156 clearerr_locked REMOVED
157 clntunix_create NEW: sunrpc ext
158 clog NEW: ISO C 9x
159 clog10 NEW: ISO C 9x
160 clog10f NEW: ISO C 9x
161 clog10l NEW: ISO C 9x
162 clogf NEW: ISO C 9x
163 clogl NEW: ISO C 9x
164 conj NEW: ISO C 9x
165 conjf NEW: ISO C 9x
166 conjl NEW: ISO C 9x
167 cpow NEW: ISO C 9x
168 cpowf NEW: ISO C 9x
169 cpowl NEW: ISO C 9x
170 cproj NEW: ISO C 9x
171 cprojf NEW: ISO C 9x
172 cprojl NEW: ISO C 9x
173 creal NEW: ISO C 9x
174 crealf NEW: ISO C 9x
175 creall NEW: ISO C 9x
176 creat64 NEW: LFS
177 csin NEW: ISO C 9x
178 csinf NEW: ISO C 9x
179 csinh NEW: ISO C 9x
180 csinhf NEW: ISO C 9x
181 csinhl NEW: ISO C 9x
182 csinl NEW: ISO C 9x
183 csqrt NEW: ISO C 9x
184 csqrtf NEW: ISO C 9x
185 csqrtl NEW: ISO C 9x
186 ctan NEW: ISO C 9x
187 ctanf NEW: ISO C 9x
188 ctanh NEW: ISO C 9x
189 ctanhf NEW: ISO C 9x
190 ctanhl NEW: ISO C 9x
191 ctanl NEW: ISO C 9x
192 des_setparity NEW: Secure RPC
193 ecb_crypt NEW: Secure RPC
194 endutxent NEW: Unix98
195 exp10 NEW: ISO C 9x
196 exp10f NEW: ISO C 9x
197 exp10l NEW: ISO C 9x
198 exp2 NEW: ISO C 9x
199 exp2f NEW: ISO C 9x
200 exp2l NEW: ISO C 9x
201 fattach NEW: STREAMS
202 fdetach NEW: STREAMS
203 fdim NEW: ISO C 9x
204 fdimf NEW: ISO C 9x
205 fdiml NEW: ISO C 9x
206 feclearexcept NEW: ISO C 9x
207 fegetenv NEW: ISO C 9x
208 fegetexceptflag NEW: ISO C 9x
209 fegetround NEW: ISO C 9x
210 feholdexcept NEW: ISO C 9x
211 feof_locked REMOVED
212 feraiseexcept NEW: ISO C 9x
213 ferror_locked REMOVED
214 fesetenv NEW: ISO C 9x
215 fesetexceptflag NEW: ISO C 9x
216 fesetround NEW: ISO C 9x
217 fetestexcept NEW: ISO C 9x
218 feupdateenv NEW: ISO C 9x
219 fflush_locked REMOVED
220 ffsl NEW: GNU ext.
221 ffsll NEW: GNU ext.
222 fgetpos64 NEW: LFS
223 fgets_unlocked NEW: GNU ext.
224 fileno_locked REMOVED
225 fma NEW: ISO C 9x
226 fmaf NEW: ISO C 9x
227 fmal NEW: ISO C 9x
228 fmax NEW: ISO C 9x
229 fmaxf NEW: ISO C 9x
230 fmaxl NEW: ISO C 9x
231 fmin NEW: ISO C 9x
232 fminf NEW: ISO C 9x
233 fminl NEW: ISO C 9x
234 fmtmsg NEW: Unix98
235 fopen64 NEW: LFS
236 fputc_locked REMOVED
237 fputs_unlocked NEW: GNU ext.
238 fread_unlocked NEW: GNU ext.
239 freopen64 NEW: LFS
240 fseeko NEW: Unix98
241 fsetpos64 NEW: LFS
242 fstatfs64 NEW: LFS
243 fstatvfs NEW: Unix98
244 fstatvfs64 NEW: LFS
245 ftello NEW: Unix98
246 ftello64 NEW: LFS
247 ftruncate64 NEW: LFS
248 ftw64 NEW: LFS
249 fwrite_unlocked NEW: GNU ext.
250 gai_strerror NEW: IPv6
251 gamma_r REMOVED
252 gammaf_r REMOVED
253 gammal_r REMOVED
254 getchar_locked REMOVED
255 getdate NEW: Unix98
256 getdate_err NEW: Unix98
257 getdate_r NEW: GNU ext.
258 getmsg NEW: STREAMS
259 getnameinfo NEW: IPv6
260 getnetname NEW: Secure RPC
261 getpmsg NEW: STREAMS
262 getpt NEW: Unix98 PTY
263 getrlimit64 NEW: LFS
264 getutxent NEW: Unix98
265 getutxid NEW: Unix98
266 getutxline NEW: Unix98
267 glob64 NEW: GNU ext.
268 globfree64 NEW: GNU ext.
269 gnu_get_libc_release NEW: GNU ext.
270 gnu_get_libc_version NEW: GNU ext.
271 grantpt NEW: Unix98 PTY
272 host2netname NEW: Secure RPC
273 iconv NEW: iconv
274 iconv_close NEW: iconv
275 iconv_open NEW: iconv
276 if_freenameindex NEW: IPv6
277 if_indextoname NEW: IPv6
278 if_nameindex NEW: IPv6
279 if_nametoindex NEW: IPv6
280 in6addr_any NEW: IPv6
281 in6addr_loopback NEW: IPv6
282 inet6_isipv4mapped NEW: IPv6
283 isastream NEW: STREAMS
284 iswblank NEW: GNU ext.
285 key_decryptsession NEW: Secure RPC
286 key_decryptsession_pk NEW: Secure RPC
287 key_encryptsession NEW: Secure RPC
288 key_encryptsession_pk NEW: Secure RPC
289 key_gendes NEW: Secure RPC
290 key_get_conv NEW: Secure RPC
291 key_secretkey_is_set NEW: Secure RPC
292 key_setnet NEW: Secure RPC
293 key_setsecret NEW: Secure RPC
294 llrint NEW: ISO C 9x
295 llrintf NEW: ISO C 9x
296 llrintl NEW: ISO C 9x
297 llround NEW: ISO C 9x
298 llroundf NEW: ISO C 9x
299 llroundl NEW: ISO C 9x
300 log2 NEW: ISO C 9x
301 log2f NEW: ISO C 9x
302 log2l NEW: ISO C 9x
303 lrint NEW: ISO C 9x
304 lrintf NEW: ISO C 9x
305 lrintl NEW: ISO C 9x
306 lround NEW: ISO C 9x
307 lroundf NEW: ISO C 9x
308 lroundl NEW: ISO C 9x
309 lseek64 NEW: LFS
310 makecontext NEW: Unix98
311 mempcpy NEW: GNU ext.
312 mmap64 NEW: LFS
313 moncontrol REMOVED
314 modify_ldt NEW: kernel
315 nan NEW: ISO C 9x
316 nanf NEW: ISO C 9x
317 nanl NEW: ISO C 9x
318 nearbyint NEW: ISO C 9x
319 nearbyintf NEW: ISO C 9x
320 nearbyintl NEW: ISO C 9x
321 netname2host NEW: Secure RPC
322 netname2user NEW: Secure RPC
323 nexttoward NEW: ISO C 9x
324 nexttowardf NEW: ISO C 9x
325 nexttowardl NEW: ISO C 9x
326 nftw NEW: Unix98
327 nftw64 NEW: LFS
328 open64 NEW: LFS
329 passwd2des NEW: Secure RPC
330 pow10 NEW: GNU ext.
331 pow10f NEW: GNU ext.
332 pow10l NEW: GNU ext.
333 pread NEW: Unix98
334 pread64 NEW: LFS
335 printf_size NEW: GNU ext.
336 printf_size_info NEW: GNU ext.
337 profil_counter REMOVED
338 pthread_mutexattr_getkind_np REPLACED
339 pthread_mutexattr_setkind_np REPLACED
340 ptsname NEW: Unix98 PTY
341 ptsname_r NEW: Unix98 PTY
342 putc_locked REMOVED
343 putchar_locked REMOVED
344 putgrent NEW: GNU ext.
345 putmsg NEW: STREAMS
346 putpmsg NEW: STREAMS
347 pututxline NEW: Unix98
348 pwrite NEW: Unix98
349 pwrite64 NEW: LFS
350 readdir64 NEW: LFS
351 readdir64_r NEW: LFS
352 remquo NEW: ISO C 9x
353 remquof NEW: ISO C 9x
354 remquol NEW: ISO C 9x
355 round NEW: ISO C 9x
356 roundf NEW: ISO C 9x
357 roundl NEW: ISO C 9x
358 rtime NEW: GNU ext.
359 scalbln NEW: ISO C 9x
360 scalblnf NEW: ISO C 9x
361 scalblnl NEW: ISO C 9x
362 scandir64 NEW: LFS
363 sendfile NEW: kernel
364 setcontext NEW: Unix98
365 setrlimit64 NEW: LFS
366 setutxent NEW: Unix98
367 sighold NEW: Unix98
368 sigignore NEW: Unix98
369 sigqueue NEW: POSIX.1b
370 sigrelse NEW: Unix98
371 sigset NEW: POSIX.1b
372 sigtimedwait NEW: POSIX.1b
373 sigwaitinfo NEW: POSIX.1b
374 sincos NEW: GNU ext.
375 sincosf NEW: GNU ext.
376 sincosl NEW: GNU ext.
377 statfs64 NEW: LFS
378 statvfs NEW: Unix98
379 statvfs64 NEW: LFS
380 strcasestr NEW: GNU ext.
381 strtoimax NEW: ISO C 9x
382 strtoumax NEW: ISO C 9x
383 strverscmp NEW: GNU ext.
384 svcauthdes_stats NEW: Secure RPC
385 svcunix_create NEW: sunrpc etx
386 svcunixfd_create NEW: sunrpc ext
387 swapcontext NEW: Unix98
388 tcgetsid NEW: Unix98 PTY
389 tdestroy NEW: GNU ext.
390 tgamma NEW: ISO C 9x
391 tgammaf NEW: ISO C 9x
392 tgammal NEW: ISO C 9x
393 tmpfile64 NEW: LFS
394 trunc NEW: ISO C 9x
395 truncate64 NEW: LFS
396 truncf NEW: ISO C 9x
397 truncl NEW: ISO C 9x
398 umount2 NEW: kernel
399 unlockpt NEW: Unix98 PTY
400 updwtmpx NEW: Unix98
401 user2netname NEW: Secure RPC
402 utmpxname NEW: Unix98
403 versionsort NEW: GNU ext.
404 versionsort64 NEW: GNU ext.
405 waitid NEW: Unix98
406 wcscasecmp NEW: GNU ext.
407 wcsncasecmp NEW: GNU ext.
408 wcsnlen NEW: GNU ext.
409 wcstoimax NEW: ISO C 9x
410 wcstoll NEW: ISO C 9x
411 wcstoull NEW: ISO C 9x
412 wcstoumax NEW: ISO C 9x
413 wcswcs NEW: Unix98
414 wordexp NEW: POSIX.2
415 wordfree NEW: POSIX.2
416 write_profiling REMOVED
417 xdecrypt NEW: Secure RPC
418 xdr_authdes_cred NEW: Secure RPC
419 xdr_authdes_verf NEW: Secure RPC
420 xdr_cryptkeyarg NEW: Secure RPC
421 xdr_cryptkeyarg2 NEW: Secure RPC
422 xdr_cryptkeyres NEW: Secure RPC
423 xdr_getcredres NEW: Secure RPC
424 xdr_key_netstarg NEW: Secure RPC
425 xdr_key_netstres NEW: Secure RPC
426 xdr_keybuf NEW: Secure RPC
427 xdr_keystatus NEW: Secure RPC
428 xdr_netnamestr NEW: Secure RPC
429 xdr_sizeof NEW: Secure RPC
430 xdr_unixcred NEW: sunrpc ext
431 xencrypt NEW: Secure RPC
432 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
433 \f
434 Version 2.0.5
436 * more bug fixes
438 * inet_ntoa is thread-safe
440 * updwtmp is moved from libutil to libc
442 * rewrite of cbrt function
444 * update of timezone data
445 \f
446 Version 2.0.4
448 * more bug fixes
449 \f
450 Version 2.0.3
452 * more bug fixes
453 \f
454 Version 2.0.2
456 * more bug fixes
458 * add atoll function
460 * fix complex problems in Berkeley DB code
462 * fix math functions
463 \f
464 Version 2.0.1
466 * fixed lots of header problems (especially Linux/GNU specific)
468 * dynamic loader preserves all registers
470 * Roland McGrath provided support for handling of auxiliary objects in
471 the ELF dynamic loader.
473 * support for parallel builds is improved
474 \f
475 Version 2.0
477 * GNU extensions are no longer declared by default. To enable them you
478 must define the macro `_GNU_SOURCE' in your program or compile with
479 `-D_GNU_SOURCE'.
481 * The library has changed from using GNU ld symbol aliases to using weak
482 symbols where available. The ELF object file format supports weak
483 symbols; GNU ld also supports weak symbols in the a.out format. (There
484 is also now support for other GNU ld extensions in ELF. Use the
485 `--with-elf' option to configure to indicate you have ELF, and
486 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
487 of many files which contained only symbol aliases, reducing the size of
488 the source and the compiled library; many other files were renamed to
489 less cryptic names previously occupied by the symbol alias files.
490 There is a new header file <elf.h> for programs which operate on
491 files in the ELF format.
493 * Converted to Autoconf version 2, so `configure' has more options.
494 Run `configure --help' to see the details.
496 * The library can now be configured to build profiling, highly-optimized
497 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
498 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
499 `configure' enable building these extra libraries. The shared library is
500 built by default when using both ELF and GNU ld. When shared libraries
501 are enabled, the new library `-ldl' is available for arbitrary run-time
502 loading of shared objects; its interface is defined in <dlfcn.h>. The
503 new header file <link.h> gives access to the internals of the run-time
504 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
505 application of same name on other systems and it provides information
506 about dynamically linked binaries.
508 * The C library now provides the run-time support code for profiling
509 executables compiled with `-pg'. Programs can control the profiling code
510 through the interface in <sys/gmon.h>. The `gmon.out' files written by
511 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
512 the support for this file format was contributed by David Mosberger-Tang.
514 * The math code has been replaced with a math library based on fdlibm from
515 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
516 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
517 functions. The math functions now reside in a separate library, so
518 programs using them will need to use `-lm' their linking commands.
520 * John C. Bowman contributed optimized ix87 assembler inline functions.
522 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
523 mechanism similar to that found in Solaris 2. This is now used for the
524 group, passwd, hosts, networks, services, protocols, rpc, ethers,
525 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
526 file controls what services are used for each individual database. This
527 works by loading shared libraries with names specified in `nsswitch.conf',
528 so service modules can be changed or added at any time without even
529 relinking any program. Currently there are the file, db, and NIS based
530 NSS services available.
532 * The new functions `strtoq' and `strtouq' parse integer values from
533 strings, like `strtol' and `strtoul', but they return `long long int' and
534 `unsigned long long int' values, respectively (64-bit quantities).
536 * The new functions `strtof' and `strtold' parse floating-point values from
537 strings, like `strtod', but they return `float' and `long double' values,
538 respectively (on some machines `double' and `long double' are the same).
540 * Ulrich Drepper has contributed new implementations of the floating-point
541 printing and reading code used in the `printf' family of functions and
542 `strtod', `strtof', and `strtold'. These new functions are perfectly
543 accurate, and much faster than the old ones.
545 * The implementation of the POSIX locale model was completely rewritten by
546 Ulrich Drepper. This includes the new programs `localedef' and `locale'
547 to compile the POSIX locale definition.
549 * The former dummy implementations of the strcoll and strxfrm function are
550 now replaced by fully functional code contributed by Ulrich Drepper. The
551 collation information comes from the POSIX locale definitions.
553 * The new header <langinfo.h> defines an interface for accessing
554 various locale-dependent data (using the locale chosen with `setlocale').
556 * Ulrich Drepper has contributed a new suite of functions for operation on
557 wide-character and multibyte-character strings, in <wchar.h>;
558 and classification and case conversion of wide characters, in <wctype.h>.
559 These new functions are conforming to the ISO C, Amendement 1 specification.
561 * There is now a second implementation of the standard I/O library available.
562 It comes from GNU libg++ as was written by Per Bothner, heavily modified
563 by Hongjiu Lu and made thread safe by Ulrich Drepper.
565 * You can now use positional parameter specifications in format strings
566 for the `printf' and `scanf' families of functions. For example,
567 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
568 ``Number 6, Mr Jones''. This is mainly useful when providing different
569 format strings for different languages, whose grammars may dictate
570 different orderings of the values being printed. To support this
571 feature, the interface for `register_printf_handler' has changed; see
572 the header file <printf.h> for details.
574 * The `printf' and `scanf' families of functions now understand a new
575 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
576 to group numbers as indicated by the locale; for `scanf' and friends, this
577 says to accept as valid only a number with all the proper grouping
578 separators in the right places. In the default "C" locale, numbers are
579 not grouped; but locales for specific countries will define the usual
580 conventions (i.e. separate thousands with `,' in the US locale).
582 * The pgrp functions have been regularized, slightly incompatibly but much
583 less confusingly. The core functions are now `getpgid' and `setpgid',
584 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
585 argument) and BSD `setpgrp' (identical to `setpgid') functions are
586 provided for compatibility. There is no longer an incompatible `getpgrp'
587 with an argument declared under _BSD_SOURCE; no BSD code uses it.
589 * The new header file <fts.h> and suite of functions simplify programs that
590 operate on directory trees. This code comes from 4.4 BSD.
592 * The resolver code has been updated from the BIND 4.9.5-P1 release.
593 Parts of the code were heavily modified by Ulrich Drepper to fit in the
594 NSS scheme used in glibc.
596 * There is a new malloc debugging hook `__memalign_hook'.
598 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
599 `unsigned int' in <sys/types.h>. These are for compatibility only and
600 their use is discouraged.
602 * The `-lmcheck' library to enable standard malloc debugging hooks is now
603 done differently, so that it works even without GNU ld.
605 * New function `euidaccess' checks allowed access to a file like `access',
606 but using the effective IDs instead of the real IDs.
608 * The time zone data files have been updated for the latest and greatest
609 local time conventions of the countries of the world.
611 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
612 see <dirent.h>.
614 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
615 for formatting floating-point numbers. They are provided only for
616 compatibility; new programs should use `sprintf' instead. There are
617 also equivalent function for the `long double' floating-point type and
618 all functions also exist in a reentrant form.
620 * The new auxiliary library `-lutil' from 4.4 BSD contains various
621 functions for maintaining the login-record files (primarily of use to
622 system programs such as `login'), and convenient functions for
623 allocating and initializing a pseudo-terminal (pty) device.
625 * Ulrich Drepper has contributed new support for System V style
626 shared memory and IPC on systems that support it.
628 * Ulrich Drepper has contributed several miscellaneous new functions found
629 in System V: The `hsearch' family of functions provide an effective
630 implementation of hash tables; `a64l' and `l64a' provide a very simple
631 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
632 number generator.
634 * Ulrich Drepper has contributed new reentrant counterparts for the
635 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
637 * Ulrich Drepper has contributed new, highly-optimized versions of several
638 string functions for the i486/Pentium family of processors.
640 * Ulrich Drepper has updated the Linux-specific code, based largely
641 on work done in Hongjiu Lu's version of GNU libc for Linux.
642 The GNU library now supports Linux versions 2.0.10 and later,
643 using the ELF object file format (i[3456]86-*-linux).
645 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
647 * David Mosberger-Tang and Richard Henderson have ported the C library
648 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
649 dynamic linking support for ELF/Alpha.
651 * Richard Henderson contributed several Alpha optimized assembler function
652 for arithmetic and string handling.
654 * Ulrich Drepper has contributed a new set of message catalog functions to
655 support multiple languages using the <libintl.h> interface, for use with
656 his new package GNU gettext. Translation volunteers have contributed
657 catalogs of the library's messages in Spanish, German, and Korean.
659 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
660 program and the `catgets' function for reading the catalog files it
661 creates. (The <libintl.h> interface is preferred; we include the
662 <nl_types.h> interface using `catgets' only for source compatibility with
663 programs already written to use it.)
665 * New header file <values.h> gives SVID-compatible names for <limits.h>
666 constants.
668 * Various new macros, declarations, and small header files for compatibility
669 with 4.4 BSD.
671 * New function `group_member' is a convenient way to check if a process has
672 a given effective group ID.
674 * When using GCC 2.7 and later, the socket functions are now declared in a
675 special way so that passing an argument of type `struct sockaddr_in *',
676 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
677 `struct sockaddr *' type, does not generate a type-clash warning.
679 * New function `error' declared in header file <error.h> is a convenient
680 function for printing error messages and optionally exiting; this is the
681 canonical function used in GNU programs. The new functions `err', `warn',
682 and friends in header file <err.h> are the canonical 4.4 BSD interface for
683 doing the same thing.
685 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
686 POSIX.2 `glob' function to do ~ and {...} expansion.
688 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
689 `clearenv' which is used in POSIX.9 is also available.
691 * New function `getsid' returns session ID number on systems that support it.
693 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
694 files <db.h> and <mpool.h> provide a rich set of functions for several
695 types of simple databases stored in memory and in files, and <ndbm.h> is
696 an old `ndbm'-compatible interface using the `db' functions. Link with
697 `-ldb' to get these functions.
699 * New macro `strdupa' copies a string like `strdup', but uses local stack
700 space from `alloca' instead of dynamic heap space from `malloc'.
702 * New function `strnlen' is like `strlen' but searches only a given maximum
703 number of characters for the null terminator. `stpncpy', `strndup' and
704 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
705 function.
707 * New function `statfs' in header <sys/statfs.h>.
709 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
710 provide convenient functions for operating on blocks of null-terminated
711 strings.
713 * A new suite of functions in <utmp.h> handle all the details of reading
714 and writing the utmp file.
716 * An implementation of the NIS/YP(tm) based NSS service was contributed by
717 Thorsten Kukuk.
719 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
720 completely POSIX compliant and also implemented the extended functionality
721 to handle alternate digit representation and alternate era date formats.
723 * Ulrich Drepper provided an implementation of the `strptime' function
724 defined in XPG4.2 which transforms a string into a `struct tm' value.
726 * Paul Eggert provided the tzselect shell script as part of the timezone
727 code. The shell script makes it easy to select the correct timezone
728 specification.
730 * The implementation of the malloc family of functions is completely replaced
731 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
732 The implementation uses the mmap function (if available) and it is
733 optimized for the use in multi threaded programs.
735 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
736 functions. This new functionality is usable by specifying a special
737 salt string and it is compatible with implementation on *BSD systems.
739 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
740 `getsubopt' to handle second level command line options, `bsd_signal'
741 to access BSD style `signal' functionality, the obsolete `regexp' style
742 expression matcher.
744 * the `lchown' function is available on system which support this
745 functionality.
747 * The implementation of the shadow password handling function was contributed
748 by Ulrich Drepper.
750 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
752 * POSIX.1g support was added. The <sys/select.h> header is available,
753 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
754 implementation of `getaddrinfo'.
755 \f
756 Version 1.09
758 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
760 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
761 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
763 * The new function `daemon' from 4.4 BSD is useful for server programs that
764 want to put themselves in the background.
766 * Joel Sherrill has contributed support for several standalone boards that
767 run without an operating system.
769 * `printf', `scanf' and friends now accept a `q' type modifier for long
770 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
772 * All of the code taken from BSD (notably most of the math and networking
773 routines) has been updated from the BSD 4.4-Lite release.
775 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
777 * The new functions `getdomainname' and `setdomainname' fetch or change the
778 YP/NIS domain name. These are system calls which exist on systems which
779 have YP (aka NIS).
781 * The time zone data files have been updated for the latest international
782 conventions.
784 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
785 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
786 \f
787 Version 1.08
789 * The C library now includes support for Sun RPC, from Sun's free
790 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
791 are included. (There is still no support for YP.)
793 * Tom Quinn has contributed a port of the C library to SGI machines running
794 Irix 4 (mips-sgi-irix4).
796 * The new `lockf' function is a simplified interface to the locking
797 facilities of `fcntl', included for compatibility.
799 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
801 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
803 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
804 compatibility.
806 * The error message printed by `assert' for a failed assertion now includes
807 the name of the program (if using GNU ld) and the name of the calling
808 function (with versions of GCC that support this).
810 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
812 * The library now includes the <sys/mman.h> header file and memory
813 management functions `mmap', `munmap', `mprotect', `msync', and
814 `madvise', on systems that support those facilities.
816 * The interface for `mcheck' has changed slightly: the function called to
817 abort the program when an allocation inconsistency is detected now takes
818 an argument that indicates the type of failure. The new function
819 `mprobe' lets you request a consistency check for a particular block at
820 any time (checks are normally done only when you call `free' or `realloc'
821 on a block).
823 * It is now possible to easily cross-compile the C library, building on one
824 system a library to run on another machine and/or operating system. All
825 you need to do is set the variable `HOST_CC' in `configparms' to the
826 native compiler for programs to run on the machine you are building on (a
827 few generator programs are used on Unix systems); set `CC' to the
828 cross-compiler.
830 * The new function `fexecve' (only implemented on the GNU system) executes
831 a program file given a file descriptor already open on the file.
832 \f
833 Version 1.07
835 * Brendan Kehoe has contributed most of a port to the DEC Alpha
836 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
838 * You can set the variable `libprefix' in `configparms' to specify a prefix
839 to be prepended to installed library files; this makes it easy to install
840 the GNU C library to be linked as `-lgnuc' or whatever.
842 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
843 copies a limited number of characters from a string, and returns the
844 address of the last character written.
846 * You no longer need to check for whether the installed `stddef.h' is
847 compatible with the GNU C library. configure now checks for you.
849 * You can now define a per-stream `fileno' function to convert the
850 stream's cookie into an integral file descriptor.
852 * ``malloc (0)'' no longer returns a null pointer. Instead, it
853 allocates zero bytes of storage, and returns a unique pointer which
854 you can pass to `realloc' or `free'. The behavior is undefined if
855 you dereference this pointer.
857 * The C library now runs on Sony NEWS m68k machines running either
858 NewsOS 3 or NewsOS 4.
860 * The new `syscall' function is a system-dependent primitive function
861 for invoking system calls. It has the canonical behavior on Unix
862 systems, including unreliable return values for some calls (such as
863 `pipe', `fork' and `getppid').
865 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
866 to `EAGAIN', which is the preferred name. On systems whose kernels
867 use two distinct codes, the C library now translates EWOULDBLOCK to
868 EAGAIN in every system call function.
869 \f
870 Version 1.06
872 * The GNU C Library Reference Manual is now distributed with the library.
873 `make dvi' will produce a DVI file of the printed manual.
874 `make info' will produce Info files that you can read on line using C-h i
875 in Emacs or the `info' program.
876 Please send comments on the manual to bug-glibc-manual@gnu.org.
878 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
880 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
882 * Jason Merrill has contributed a port to the Sequent Symmetry running
883 Dynix version 3 (i386-sequent-dynix).
885 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
886 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
888 * New function `memory_warnings' lets you arrange to get warnings when
889 malloc is running out of memory to allocate, like Emacs gives you.
891 * The C library now contains the relocating allocator used in Emacs 19 for
892 its editing buffers. This allocator (ralloc) minimizes allocation
893 overhead and fragmentation by moving allocated regions around whenever it
894 needs to. You always refer to a ralloc'd region with a "handle" (a
895 pointer to a pointer--an object of type `void **').
897 * There is a new `printf' format: `%m' gives you the string corresponding
898 to the error code in `errno'.
900 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
901 or `%[' conversion, but instead of filling in a fixed-sized buffer you
902 pass, the `a' modifier says to fill in a `char **' you pass with a
903 malloc'd string.
905 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
906 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
907 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
909 * `mkstemp' is a traditional Unix function to atomically create and open a
910 uniquely-named temporary file.
911 \f
912 Version 1.05
914 * The standard location for the file that says what the local timezone is
915 has changed again. It is now `/usr/local/etc/localtime' (or more
916 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
918 * The distribution no longer contains any files with names longer than 14
919 characters.
921 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
922 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
924 * New functions `ttyslot' and `syslog' from 4.4 BSD.
925 \f
926 Version 1.04
928 * The configuration process has changed quite a bit. The `configure'
929 script is now used just like the configuration scripts for other GNU
930 packages. The `sysdeps' directory hierarchy is much rearranged.
931 The file `INSTALL' explains the new scheme in detail.
933 * The header files no longer need to be processed into ANSI C and
934 traditional C versions. There is just one set of files to install, and
935 it will work with ANSI or old C compilers (including `gcc -traditional').
937 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
938 MIPS DECStation running Ultrix 4.
940 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
941 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
942 made itself into a shared library.
944 * Yet further improved support for the i386, running 4.3 BSD-like systems
945 (such as Mach 3 with the Unix single-server), or System V.
947 * New function `strncasecmp' to do case-insensitive string comparison
948 with limited length.
950 * New function `strsep' is a reentrant alternative to `strtok'.
952 * New functions `scandir' and `alphasort' for searching directories.
954 * New function `setenv' is a better interface to `putenv'.
956 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
957 function for traversing a directory tree.
959 * The GNU obstack package is now also part of the C library.
960 The new function `open_obstack_stream' creates a stdio stream that
961 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
962 formatted output directly to an obstack.
964 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
965 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
967 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
969 * The new functions `strfry' and `memfrob' do mysterious and wonderful
970 things to your strings.
972 * There are some new test programs: test-fseek, testmb, and testrand.
974 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
975 These ports are not finished, but are a good starting place for really
976 supporting those systems.
978 * `/etc/localtime' is now the standard location for the file that says what
979 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
980 This follows the general principle that `/etc' is the place for all local
981 configuration files.
983 * The C library header files now use `extern "C"' when used by the C++
984 compiler, so the C library should now work with C++ code.
986 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
987 bcmp, bzero, and ffs.
989 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
990 function which uses the `merge sort' algorithm, and is said to be
991 significantly faster than the old GNU `qsort' function. Merge sort is
992 now the standard `qsort' function. The new algorithm can require a lot
993 of temporary storage; so, the old sorting function is called when the
994 required storage is not available.
996 * The C library now includes Michael Glad's Ultra Fast Crypt, which
997 provides the Unix `crypt' function, plus some other entry points.
998 Because of the United States export restriction on DES implementations,
999 we are distributing this code separately from the rest of the C library.
1000 There is an extra distribution tar file just for crypt; it is called
1001 `glibc-VERSION-crypt.tar.Z', e.g. `glibc-1.04-crypt.tar.Z'. You can just
1002 unpack the crypt distribution along with the rest of the C library and
1003 build; you can also build the library without getting crypt. Users
1004 outside the USA can get the crypt distribution via anonymous FTP from
1005 ftp.uni-c.dk [129.142.6.74], or another archive site outside the U.S.
1007 * The code and header files taken from 4.4 BSD have been updated with the
1008 latest files released from Berkeley.
1009 \f
1010 ----------------------------------------------------------------------
1011 Copyright information:
1013 Copyright (C) 1992, 93, 94, 95, 96 Free Software Foundation, Inc.
1015 Permission is granted to anyone to make or distribute verbatim copies
1016 of this document as received, in any medium, provided that the
1017 copyright notice and this permission notice are preserved,
1018 thus giving the recipient permission to redistribute in turn.
1020 Permission is granted to distribute modified versions
1021 of this document, or of portions of it,
1022 under the above conditions, provided also that they
1023 carry prominent notices stating who last changed them.
1024 \f
1025 Local variables:
1026 version-control: never
1027 end: