diff options
Diffstat (limited to 'manual/creature.texi')
| -rw-r--r-- | manual/creature.texi | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/manual/creature.texi b/manual/creature.texi index fe7a7790a2..8876b2ab77 100644 --- a/manual/creature.texi +++ b/manual/creature.texi @@ -221,13 +221,20 @@ precedence. If you define this macro, most features are included apart from X/Open, LFS and GNU extensions: the effect is to enable features from the 2008 edition of POSIX, as well as certain BSD and SVID features -without a separate feature test macro to control them. Defining this -macro, on its own and without using compiler options such as -@option{-ansi} or @option{-std=c99}, has the same effect as not -defining any feature test macros; defining it together with other -feature test macros, or when options such as @option{-ansi} are used, -enables those features even when the other options would otherwise -cause them to be disabled. +without a separate feature test macro to control them. + +Be aware that compiler options also affect included features: + +@itemize +@item +If you use a strict conformance option, features beyond those from the +compiler's language version will be disabled, though feature test +macros may be used to enable them. + +@item +Features enabled by compiler options are not overridden by feature +test macros. +@end itemize @end defvr @defvr Macro _ATFILE_SOURCE |