_GL_HAS_BUILTIN_MUL_OVERFLOW  119 lib/intprops-internal.h # define _GL_HAS_BUILTIN_MUL_OVERFLOW 0
_GL_HAS_BUILTIN_MUL_OVERFLOW  121 lib/intprops-internal.h # define _GL_HAS_BUILTIN_MUL_OVERFLOW _GL_HAS_BUILTIN_ADD_OVERFLOW