diff options
Diffstat (limited to 'manual/creature.texi')
| -rw-r--r-- | manual/creature.texi | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/manual/creature.texi b/manual/creature.texi index 6b4d42fbe9..37dee54b56 100644 --- a/manual/creature.texi +++ b/manual/creature.texi @@ -67,15 +67,31 @@ the normal C library. @comment GNU @defvr Macro _SVID_SOURCE If you define this macro, functionality derived from SVID is -included as well as the ANSI C, POSIX.1, and POSIX.2 material. +included as well as the ANSI C, POSIX.1, POSIX.2, and X/Open material. +@end defvr + +@comment (none) +@comment XOPEN +@defvr Macro _XOPEN_SOURCE +If you define these macro, functionality described in the X/Open +Portability Guide is included. This is an superset of the POSIX.1 and +POSIX.2 functionality and in fact @code{_POSIX_SOURCE} and +@code{_POSIX_C_SOURCE} get automatically be defined. + +But as the great unifaction of all Unices there is also functionality +only available in BSD and SVID is included. + +If the macro @code{_XOPEN_SOURCE_EXTENDED} is also defined, even more +functionality is available. The extra functions will make all functions +available which are necessary for the X/Open Unix brand. @end defvr @comment (none) @comment GNU @defvr Macro _GNU_SOURCE If you define this macro, everything is included: ANSI C, POSIX.1, -POSIX.2, BSD, SVID, and GNU extensions. In the cases where POSIX.1 -conflicts with BSD, the POSIX definitions take precedence. +POSIX.2, BSD, SVID, X/Open, and GNU extensions. In 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 BSD definitions take precedence over the POSIX definitions, use this @@ -96,8 +112,8 @@ get very strange errors at run time. @comment (none) @comment GNU @defvr Macro _REENTRANT,_THREAD_SAFE -If you define this macro, reentrant versions of several functions get -declared. Some of the functions is specified in POSIX.1c but many others +If you define one this macro, reentrant versions of several functions get +declared. Some of the functions are specified in POSIX.1c but many others are only available on a few other systems or are unique to GNU libc. The problem is that the standardization of the thread safe C library interface still is behind. |