__has_builtin     103 lib/intprops-internal.h #elif defined __has_builtin
__has_builtin     104 lib/intprops-internal.h #    define _GL_HAS_BUILTIN_ADD_OVERFLOW __has_builtin (__builtin_add_overflow)
__has_builtin     128 lib/intprops-internal.h #elif defined __has_builtin
__has_builtin     129 lib/intprops-internal.h #    define _GL_HAS_BUILTIN_OVERFLOW_P __has_builtin (__builtin_mul_overflow_p)