diff options
Diffstat (limited to 'include/features.h')
| -rw-r--r-- | include/features.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/features.h b/include/features.h index bc10510415..de2b143b60 100644 --- a/include/features.h +++ b/include/features.h @@ -244,9 +244,23 @@ #define __GLIBC__ 2 #define __GLIBC_MINOR__ 2 +/* Convenience macros to test the versions of glibc and gcc. + Use them like this: + #if __GNUC_PREREQ (2,8) + ... code requiring gcc 2.8 or later ... + #endif + Note - they won't work for gcc1 or glibc1, since the _MINOR macros + were not defined then. */ +#define __GNUC_PREREQ(maj,min) (defined __GNUC__ && defined __GNUC_MINOR__ \ + && ((__GNUC__ << 16) + __GNUC_MINOR__) >= ((maj<<16) + min)) +#define __GLIBC_PREREQ(maj,min) (defined __GLIBC__ && defined __GLIBC_MINOR__ \ + && ((__GLIBC__ << 16) + __GLIBC_MINOR__) >= ((maj<<16) + min)) + /* This is here only because every header file already includes this one. */ #ifndef __ASSEMBLER__ +#ifndef _SYS_CDEFS_H # include <sys/cdefs.h> +#endif /* If we don't have __REDIRECT, prototypes will be missing if __USE_FILE_OFFSET64 but not __USE_LARGEFILE[64]. */ |