diff options
Diffstat (limited to 'features.h')
| -rw-r--r-- | features.h | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/features.h b/features.h index 9baaa053fa..a14179b6a3 100644 --- a/features.h +++ b/features.h @@ -24,6 +24,7 @@ to specify the desired environment: __STRICT_ANSI__ ISO Standard C. + _ISOC9X_SOURCE Extensions to ISO C 89 from ISO C 9x. _POSIX_SOURCE IEEE Std 1003.1. _POSIX_C_SOURCE If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2; if >=199309L, add IEEE Std 1003.1b-1993 @@ -44,6 +45,7 @@ These are defined by this file and are used by the header files to decide what to declare or define: + __USE_ISOC9X Define ISO C 9X things. __USE_POSIX Define IEEE Std 1003.1 things. __USE_POSIX2 Define IEEE Std 1003.2 things. __USE_POSIX199309 Define IEEE Std 1003.1b things. @@ -69,6 +71,7 @@ /* Undefine everything, so we get a clean slate. */ +#undef __USE_ISOC9X #undef __USE_POSIX #undef __USE_POSIX2 #undef __USE_POSIX199309 @@ -102,6 +105,8 @@ /* If _GNU_SOURCE was defined by the user, turn on all the other features. */ #ifdef _GNU_SOURCE +#undef _ISOC9X_SOURCE +#define _ISOC9X_SOURCE 1 #undef _POSIX_SOURCE #define _POSIX_SOURCE 1 #undef _POSIX_C_SOURCE @@ -118,14 +123,20 @@ /* If nothing (other than _GNU_SOURCE) is defined, define _BSD_SOURCE and _SVID_SOURCE. */ -#if (!defined __STRICT_ANSI__ && !defined _POSIX_SOURCE && \ - !defined _POSIX_C_SOURCE && !defined _XOPEN_SOURCE && \ - !defined _XOPEN_SOURCE_EXTENDED && !defined _BSD_SOURCE && \ - !defined _SVID_SOURCE) +#if (!defined __STRICT_ANSI__ && !defined _ISOC9X_SOURCE && \ + !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE && \ + !defined _XOPEN_SOURCE && !defined _XOPEN_SOURCE_EXTENDED && \ + !defined _BSD_SOURCE && !defined _SVID_SOURCE) #define _BSD_SOURCE 1 #define _SVID_SOURCE 1 #endif +/* This is to enable the ISO C 9x extension. It will go away as soon + as this standard is officially released. */ +#ifdef _ISOC9X_SOURCE +#define __USE_ISOC9X 1 +#endif + /* If none of the ANSI/POSIX macros are defined, use POSIX.1 and POSIX.2 (and IEEE Std 1003.1b-1993 unless _XOPEN_SOURCE is defined). */ #if (!defined __STRICT_ANSI__ && !defined _POSIX_SOURCE && \ |