Don't set __STDC_IEC_559__
@@ -340,7 +340,6 @@ impl<'a> PreProcessor<'a> {
"__STDC_NO_COMPLEX__".into() => int_def(1),
"__STDC_NO_THREADS__".into() => int_def(1),
"__STDC_NO_VLA__".into() => int_def(1),
- "__STDC_IEC_559__".into() => int_def(1),
"__DATE__".into() => str_def(&now.format("%b %_d %Y")),
"__TIME__".into() => str_def(&now.format("%H:%M:%S")),
};
