diff options
| author | Mattias Andrée <maandree@operamail.com> | 2015-10-12 22:20:33 +0200 |
|---|---|---|
| committer | Mattias Andrée <maandree@operamail.com> | 2015-10-12 22:21:29 +0200 |
| commit | 595e89bf46faca9f511a6cd0b3f10c53e1b23110 (patch) | |
| tree | 65cc61a359a705a68d5202ad8f968772362ec5aa /doc | |
| parent | some feature-test macros (diff) | |
| download | slibc-595e89bf46faca9f511a6cd0b3f10c53e1b23110.tar.gz slibc-595e89bf46faca9f511a6cd0b3f10c53e1b23110.tar.bz2 slibc-595e89bf46faca9f511a6cd0b3f10c53e1b23110.tar.xz | |
feature-test macros
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/info/chap/introduction.texinfo | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/doc/info/chap/introduction.texinfo b/doc/info/chap/introduction.texinfo index 43f4898..1501dc0 100644 --- a/doc/info/chap/introduction.texinfo +++ b/doc/info/chap/introduction.texinfo @@ -336,5 +336,59 @@ Enables functionality from @i{System V Interface Description} (@sc{SVID}), as well as @sc{ISO}@tie{}C, @sc{POSIX}.1, @sc{POSIX}.2, and X/Open. +@item _XOPEN_SOURCE +@cpindex X/Open Portability Guide +@lvindex _XOPEN_SOURCE +Enables functionality from @i{X/Open Portability Guide}, +included in @sc{BSD} and @sc{SVID}, as well as +@sc{POSIX}.1 and @sc{POSIX}.2. + +@item _XOPEN_SOURCE_EXTENDED +@cpindex X/Open Portability Guide +@lvindex _XOPEN_SOURCE +@lvindex _XOPEN_SOURCE_EXTENDED +Enables all functionality that @code{_XOPEN_SOURCE} +enables, and functionality that is required for the +X/Open Unix brand. + +@item _XOPEN_SOURCE >= 500 +@cpindex X/Open Portability Guide +@cpindex Single Unix Specification +@cpindex @sc{SUS} +@lvindex _XOPEN_SOURCE +@lvindex _XOPEN_SOURCE_EXTENDED +Enables all functionality that @code{_XOPEN_SOURCE_EXTENDED} +enables. It also enables functionality from version 2 +of the @i{Single Unix Specification} (@sc{SUS}). + +@item _GNU_SOURCE +@cpindex @sc{GNU}'s not Unix +@cpindex @sc{GNU} C Libraries +@lvindex _GNU_SOURCE +Enables all functionality from @sc{ISO}@tie{}C89, +@sc{ISO}@tie{}C99, @sc{POSIX}.1, @sc{POSIX}.2, +@sc{BSD}, @sc{SVID}, X/Open, @sc{SUS}, the +Large File Support extension, and extensions +derived from the @sc{GNU} C Libraries. It also +defines @code{_ATFILE_SOURCE}. + +@lvindex _BSD_SOURCE +@sc{POSIX}.1 takes precedence when there are +conflicts between @sc{POSIX}.1 and @sc{BSD} +or @sc{SVID}. To override this, define +@code{_BSD_SOURCE}. + +@code{_GNU_SOURCE} does not automatically +define @code{_BSD_SOURCE} or @code{_SVID_SOURCE}. + @end table +@c TODO: _LARGEFILE_SUPPORT +@c TODO: _LARGEFILE64_SUPPORT +@c TODO: _FILE_OFFSET_BITS +@c TODO: _ATFILE_SOURCE +@c TODO: _DEFAULT_SOURCE +@c TODO: _REETRANT +@c TODO: _THREADSAFE (alias for _REETRANT) +@c TODO: _POSIX_C_SOURCE >= 200112L +@c TODO: _POSIX_C_SOURCE >= 200809L |