Where can I change the compile options that Hise uses when compiling faust nodes?

I can open the .cpp file generated by Hise for my faust dsp and it has the compile options Hise used commented out at the top, but I don't know where in Hise I can edit those.

As an example I would like to use double precision floats. Hise is currently set to use single.

@aaronventure thanks!

I had actually just figured out on my own how to do this with a gain module directly. But your version in scriptnode is better.