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-rw-r--r--include/features.h10
1 files changed, 6 insertions, 4 deletions
diff --git a/include/features.h b/include/features.h
index 96ac7e5f75..6e3a8763b3 100644
--- a/include/features.h
+++ b/include/features.h
@@ -29,7 +29,8 @@
if >=199309L, add IEEE Std 1003.1b-1993;
if >=199506L, add IEEE Std 1003.1c-1995
_XOPEN_SOURCE Includes POSIX and XPG things. Set to 500 if
- Single Unix conformance is wanted.
+ Single Unix conformance is wanted, to 600 for the
+ upcoming sixth revision.
_XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions.
_LARGEFILE_SOURCE Some more functions for correct standard I/O.
_LARGEFILE64_SOURCE Additional functionality from LFS for large files.
@@ -57,7 +58,8 @@
__USE_XOPEN Define XPG things.
__USE_XOPEN_EXTENDED Define X/Open Unix things.
__USE_UNIX98 Define Single Unix V2 things.
- __USE_XOPEN2K Define XPG6 things
+ __USE_XOPEN2K Define XPG6 things.
+ __USE_LARGEFILE Define correct standard I/O things.
__USE_LARGEFILE64 Define LFS things with separate names.
__USE_FILE_OFFSET64 Define 64bit interface as default.
__USE_BSD Define 4.3BSD things.
@@ -162,7 +164,7 @@
#if (!defined __STRICT_ANSI__ && !defined _POSIX_SOURCE && \
!defined _POSIX_C_SOURCE)
# define _POSIX_SOURCE 1
-# if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) != 500
+# if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 500
# define _POSIX_C_SOURCE 2
# else
# define _POSIX_C_SOURCE 199506L
@@ -192,7 +194,7 @@
# define __USE_UNIX98 1
# undef _LARGEFILE_SOURCE
# define _LARGEFILE_SOURCE 1
-# if (_XOPEN_SOURCE - 0) == 600
+# if (_XOPEN_SOURCE - 0) >= 600
# define __USE_XOPEN2K 1
# endif
# else