[fpc-pascal] nested macros in C headers

[Marco van de Voort]

In our previous episode, Bernd said:
> 
> How should I now proceed? Should I try to make this entire thing
> (including its macro pocessor) compile with a current FPC? I don't
> really like this idea because v4l1 is deprecated anyways. And the
> separate macro processor and the makefile also somehow does not look
> tlike the right approach to me, there must be a better way. And I
> don't need the entire full blown thing, only a small subset for a
> small quick and dirty program to try a little idea of mine (might
> prove to be throw-away code anyways).

I always used a small program to simply calculate the hex constants.