__has_builtin      99 lib/intprops-internal.h #elif defined __has_builtin
__has_builtin     100 lib/intprops-internal.h #define _GL_HAS_BUILTIN_ADD_OVERFLOW __has_builtin (__builtin_add_overflow)
__has_builtin     124 lib/intprops-internal.h #elif defined __has_builtin
__has_builtin     125 lib/intprops-internal.h #define _GL_HAS_BUILTIN_OVERFLOW_P __has_builtin (__builtin_mul_overflow_p)