diff options
Diffstat (limited to 'support/verify.h')
| -rw-r--r-- | support/verify.h | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/support/verify.h b/support/verify.h index f0b3fc58..c7002432 100644 --- a/support/verify.h +++ b/support/verify.h @@ -285,14 +285,16 @@ template <int w> # define _GL_HAS_BUILTIN_TRAP 0 #endif -#if defined __clang_major__ && __clang_major__ < 5 -# define _GL_HAS_BUILTIN_UNREACHABLE 0 -#elif 4 < __GNUC__ + (5 <= __GNUC_MINOR__) -# define _GL_HAS_BUILTIN_UNREACHABLE 1 -#elif defined __has_builtin -# define _GL_HAS_BUILTIN_UNREACHABLE __has_builtin (__builtin_unreachable) -#else -# define _GL_HAS_BUILTIN_UNREACHABLE 0 +#ifndef _GL_HAS_BUILTIN_UNREACHABLE +# if defined __clang_major__ && __clang_major__ < 5 +# define _GL_HAS_BUILTIN_UNREACHABLE 0 +# elif 4 < __GNUC__ + (5 <= __GNUC_MINOR__) +# define _GL_HAS_BUILTIN_UNREACHABLE 1 +# elif defined __has_builtin +# define _GL_HAS_BUILTIN_UNREACHABLE __has_builtin (__builtin_unreachable) +# else +# define _GL_HAS_BUILTIN_UNREACHABLE 0 +# endif #endif /* Each of these macros verifies that its argument R is nonzero. To |