diff options
Diffstat (limited to 'winsup/cygwin/include/features.h')
| -rw-r--r-- | winsup/cygwin/include/features.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/winsup/cygwin/include/features.h b/winsup/cygwin/include/features.h index 0fcc90bfd..69c12d22c 100644 --- a/winsup/cygwin/include/features.h +++ b/winsup/cygwin/include/features.h @@ -14,4 +14,22 @@ details. */ #include <sys/cdefs.h> #include <sys/features.h> +/* Various options should be defined here, but the framework to do this + is not laid down so far. Especially notable are the following defines, + which can be used by the application to switch on or off various + datatypes and function prototypes: + + _BSD_SOURCE to include pure BSD functions which are not defined + under POSIX. + + _POSIX_SOURCE if the application requests a POSIX compatible system. + + _XOPEN_SOURCE if X/Open functions and datatypes are requested. This + option includes _POSIX_SOURCE. + + _GNU_SOURCE to turn on GNU extensions which might collide with defines + used in application or library headers. This option + includes _BSD_SOURCE, _XOPEN_SOURCE and _POSIX_SOURCE. +*/ + #endif /* _FEATURES_H */ |