Compilation issue on newer system -- Include missing

[kebekus]

Dear Nico,

thanks again for this wonderful piece of software!

I have an issue with compilation, though. On newer systems (Fedora 36, or the latest flatpak sdk) the code does not compile anymore because and include is missing. The code does compile again if I add the following line (either to metaf.hpp or to my code before incluing metaf.hpp)

#include <cstring>

I would be great if you could add the line to metaf.hpp, in order to avoid these issues.

Best wishes from the Black Forest,

Stefan.