diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/my_compiler.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/my_compiler.h b/include/my_compiler.h index 1cd46ff4260..c7d334999d0 100644 --- a/include/my_compiler.h +++ b/include/my_compiler.h @@ -32,8 +32,15 @@ /* GNU C/C++ */ #if defined __GNUC__ +/* Convenience macro to test the minimum required GCC version. */ +# define MY_GNUC_PREREQ(maj, min) \ + ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) /* Any after 2.95... */ # define MY_ALIGN_EXT +/* Comunicate to the compiler the unreachability of the code. */ +# if MY_GNUC_PREREQ(4,5) +# define MY_ASSERT_UNREACHABLE() __builtin_unreachable() +# endif /* Microsoft Visual C++ */ #elif defined _MSC_VER @@ -67,7 +74,7 @@ #endif /** - Generic compiler-dependent features. + Generic (compiler-independent) features. */ #ifndef MY_ALIGNOF # ifdef __cplusplus @@ -79,6 +86,10 @@ # endif #endif +#ifndef MY_ASSERT_UNREACHABLE +# define MY_ASSERT_UNREACHABLE() do { assert(0); } while (0) +#endif + /** C++ Type Traits */ |