_GL_HAS_BUILTIN_MUL_OVERFLOW  138 lib/intprops-internal.h      && ! (_GL_HAS_BUILTIN_ADD_OVERFLOW && _GL_HAS_BUILTIN_MUL_OVERFLOW))
_GL_HAS_BUILTIN_MUL_OVERFLOW  158 lib/intprops-internal.h #if _GL_HAS_BUILTIN_MUL_OVERFLOW