GCC_VERSION

......
#include <ansidecl.h>
......
#ifdef GCC_VERSION
int g_nGccVersion=GCC_VERSION;
#else
int g_nGccVersion=0;
#endif
printf( "GCC_VERSION: %d\n", g_nGccVersion );
.....

...... #include <ansidecl.h> ...... #ifdef GCC_VERSION int g_nGccVersion=GCC_VERSION; #else int g_nGccVersion=0; #endif printf( "GCC_VERSION: %d\n", g_nGccVersion ); .....

/* This macro simplifies testing whether we are using gcc, and if it
is of a particular minimum version. (Both major & minor numbers are
significant.)  This macro will evaluate to 0 if we are not using
gcc at all.  */
#ifndef GCC_VERSION
#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
#endif /* GCC_VERSION */

/* This macro simplifies testing whether we are using gcc, and if it is of a particular minimum version. (Both major &amp; minor numbers are significant.) This macro will evaluate to 0 if we are not using gcc at all. */ #ifndef GCC_VERSION #define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__) #endif /* GCC_VERSION */