[QBS] Per file compile switches

[Stephan Gatzka]

> Well, you could put each file in its own Group and set cpp.commonCompilerFlags in each Group. I'm not suggesting you
> actually do this due to the inconvenience, but it raises an interesting question about how we could potentially make
> something like this more usable.
> 
> I think a new property on the cpp module which calculates the hash and adds this flag for you (-frandom
> -seed=qbs.getHash(input.filePath)?), would be welcome, though.

Well, yes, I think that's the most straightforward way to do.

Regards,

Stephan