diff options
Diffstat (limited to 'posix/unistd.h')
| -rw-r--r-- | posix/unistd.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/posix/unistd.h b/posix/unistd.h index 2fbdae5652..0147594f53 100644 --- a/posix/unistd.h +++ b/posix/unistd.h @@ -40,6 +40,9 @@ __BEGIN_DECLS /* POSIX Standard approved as ISO/IEC 9945-2 as of December, 1993. */ #define _POSIX2_C_VERSION 199209L +/* The utilities on GNU systems also correspond to this version. */ +#define _POSIX2_VERSION 199209L + /* If defined, the implementation supports the C Language Bindings Option. */ #define _POSIX2_C_BIND 1 @@ -56,8 +59,12 @@ __BEGIN_DECLS creation of locales with the localedef utility. */ #define _POSIX2_LOCALEDEF 1 -/* Library conforms to X/Open version 4. */ -#define _XOPEN_VERSION 4 +/* X/Open version number to which the library conforms. It is selectable. */ +#ifdef __USE_UNIX98 +# define _XOPEN_VERSION 500 +#else +# define _XOPEN_VERSION 4 +#endif /* Commands and utilities from XPG4 are available. */ #define _XOPEN_XCU_VERSION 4 |