diff options
Diffstat (limited to 'include/features.h')
| -rw-r--r-- | include/features.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/features.h b/include/features.h index bbf03f0692..70d9c090fc 100644 --- a/include/features.h +++ b/include/features.h @@ -42,8 +42,9 @@ _THREAD_SAFE Same as _REENTRANT, often used by other systems. The `-ansi' switch to the GNU C compiler defines __STRICT_ANSI__. - If none of these are defined, the default is all but _GNU_SOURCE. - If more than one of these are defined, they accumulate. + If none of these are defined, the default is to have _SVID_SOURCE, + _BSD_SOURCE, and _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to + 199506L. If more than one of these are defined, they accumulate. For example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE together give you ISO C, 1003.1, and 1003.2, but nothing else. |