diff options
| -rw-r--r-- | include/my_global.h | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/include/my_global.h b/include/my_global.h index 2601c53bb92..7ec04377864 100644 --- a/include/my_global.h +++ b/include/my_global.h @@ -121,19 +121,36 @@ #endif /* - Solaris include file <sys/feature_tests.h> refers to X/Open document + Solaris 9 include file <sys/feature_tests.h> refers to X/Open document System Interfaces and Headers, Issue 5 - saying we should define _XOPEN_SOURCE=500 to get POSIX.1c prototypes + saying we should define _XOPEN_SOURCE=500 to get POSIX.1c prototypes, but apparently other systems (namely FreeBSD) don't agree. - Furthermore X/Open has since 2004 "System Interfaces, Issue 6" - that dictates _XOPEN_SOURCE=600, but Solaris checks for 500. - So, let's define 500 for solaris only. + + On a newer Solaris 10, the above file recognizes also _XOPEN_SOURCE=600. + Furthermore, it tests that if a program requires older standard + (_XOPEN_SOURCE<600 or _POSIX_C_SOURCE<200112L) it cannot be + run on a new compiler (that defines _STDC_C99) and issues an #error. + It's also an #error if a program requires new standard (_XOPEN_SOURCE=600 + or _POSIX_C_SOURCE=200112L) and a compiler does not define _STDC_C99. + + To add more to this mess, Sun Studio C compiler defines _STDC_C99 while + C++ compiler does not! + + So, in a desperate attempt to get correct prototypes for both + C and C++ code, we define either _XOPEN_SOURCE=600 or _XOPEN_SOURCE=500 + depending on the compiler's announced C standard support. + + Cleaner solutions are welcome. */ #ifdef __sun +#if __STDC_VERSION__ - 0 >= 199901L +#define _XOPEN_SOURCE 600 +#else #define _XOPEN_SOURCE 500 #endif +#endif #if defined(THREAD) && !defined(__WIN__) && !defined(OS2) #ifndef _POSIX_PTHREAD_SEMANTICS |