Faster compilation speed

[Neil Booth]

Noel Yap wrote:-

> I don't see this as too big a problem.  Just output a
> file like:
> #if COND
> /* contents of header file
> #endif
> 
> In fact, doing it this way has the advantage that
> several builds, not necessarily agreeing on the value
> of COND, can use the file.

Hmm, and what about header guards?  Infinite recursion?

> I think one needn't preprocess everything perfectly in
> order to gain significant advantages.  Would you say
> that what I suggest is better than what we have now?

Correctness is paramount; if it's not correct it's no
good.

Neil.