Doesn't work on Windows

[CryZe]

It seems a lot of assumptions about the preprocessor are made that don't apply to the preprocessor on Windows.

[vickenty]

Indeed, lang-c currently relies on gcc to do preprocessing. I don't know if msvc command-line compiler can be used as a stand-alone preprocessor, but it would be nice to support it if it is. PRs welcome :)

[Artoria2e5]

There seems to be a cl /P