_GL_HAS_BUILTIN_MUL_OVERFLOW 143 lib/intprops-internal.h && ! (_GL_HAS_BUILTIN_ADD_OVERFLOW && _GL_HAS_BUILTIN_MUL_OVERFLOW)) _GL_HAS_BUILTIN_MUL_OVERFLOW 163 lib/intprops-internal.h #if _GL_HAS_BUILTIN_MUL_OVERFLOW