Re: Expressing dependencies

[Robert Collins]

On Sun, 2004-01-04 at 08:17, Laurence Finston wrote:

> The problem is that make makes certain assumptions that don't apply when CWEB
> is used.

I think thats an incorrect statement. It would be more accurate to say
that CWEB hasn't been built with any thought to the impact on make. Make
has only the file system data available to it to determine 'has X
changed more recently than Y.' config.status for example, when it
regenerates config.h will only alter the file if the contents have
changed - so that it preserves the timestamp. I think that most
pre-preocessors in this sense could benefit from a wrapper of some sort
that would equally not alter the file IF nothing had changed - and you
could use that wrapper directly in make rules for ctangle.

Rob

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