_GL_HAS_BUILTIN_MUL_OVERFLOW  124 lib/intprops-internal.h # define _GL_HAS_BUILTIN_MUL_OVERFLOW 0
_GL_HAS_BUILTIN_MUL_OVERFLOW  126 lib/intprops-internal.h # define _GL_HAS_BUILTIN_MUL_OVERFLOW _GL_HAS_BUILTIN_ADD_OVERFLOW