[fpc-pascal] Build in a C compiler

[Marco van de Voort]

In our previous episode, Mark Morgan Lloyd said:
> > 
> > Pascal and C are close related.
> 
> No. Pascal and ALGOL are closely related, C and ALGOL are closely 
> related. Pascal and C are not so closely related.

Did ALGOL standarize the preprocessor? The high reliance on preprocessor is
often a hinderance in automated C conversion.