* manual/creature.texi (Feature Test Macros): Mention _ISOC99_SOURCE.
This commit is contained in:
Ulrich Drepper 1999-10-31 18:04:47 +00:00
parent 592d2832b2
commit b4cbd37109
2 changed files with 17 additions and 5 deletions

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@ -1,5 +1,7 @@
1999-10-31 Ulrich Drepper <drepper@cygnus.com> 1999-10-31 Ulrich Drepper <drepper@cygnus.com>
* manual/creature.texi (Feature Test Macros): Mention _ISOC99_SOURCE.
* includes/features.h: Replace __USE_ISOC9X by __USE_ISOC99 and also * includes/features.h: Replace __USE_ISOC9X by __USE_ISOC99 and also
recognize _ISOC99_SOURCE. recognize _ISOC99_SOURCE.
* libio/stdio.h: Likewise. * libio/stdio.h: Likewise.

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@ -193,12 +193,22 @@ This macro was introduced as part of the Large File Support extension
(LFS). (LFS).
@end defvr @end defvr
@comment (none)
@comment GNU
@defvr Macro _ISOC99_SOURCE
Until the revides @w{ISO C} standard is widely adopted the new features
are not automatically enabled. The GNU libc nevertheless has a complete
implementation of the new standard and to enable the new features the
macro @code{_ISOC99_SOURCE} should be defined.
@end defvr
@comment (none) @comment (none)
@comment GNU @comment GNU
@defvr Macro _GNU_SOURCE @defvr Macro _GNU_SOURCE
If you define this macro, everything is included: @w{ISO C}, POSIX.1, If you define this macro, everything is included: @w{ISO C89}, @w{ISO
POSIX.2, BSD, SVID, X/Open, LFS, and GNU extensions. In the cases where C99}, POSIX.1, POSIX.2, BSD, SVID, X/Open, LFS, and GNU extensions. In
POSIX.1 conflicts with BSD, the POSIX definitions take precedence. the cases where POSIX.1 conflicts with BSD, the POSIX definitions take
precedence.
If you want to get the full effect of @code{_GNU_SOURCE} but make the If you want to get the full effect of @code{_GNU_SOURCE} but make the
BSD definitions take precedence over the POSIX definitions, use this BSD definitions take precedence over the POSIX definitions, use this