In reply to @tauruuuuuus "But I do have": I did quick test to enable
`--exceptions:cpp` option and here is what I did:
https://github.com/demotomohiro/MinimumNimPico/commit/562c830cea566d15af47243fc2
4869c92509bd8e
https://github.com/demotomohiro/MinimumNimPico/commit/4f673999f62326fbf8965ce61f
04d63fef078540
My code doesn't raise exception and it just to see how much runtime will be
added.
Raising exception might call `malloc` but you can implement it with dummy
`malloc` that just return a pointer to statically allocated memory.