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Re: make: ignore stale .depend

On Tue, Nov 23, 2010 at 05:35:13PM -0800, Simon J. Gerraty wrote:
> The logic in make to ignore stale dependencies learned from .depend 
> seems incomplete.
> When a source file moves, make will ignore the stale dependency,
> but if the file in question is one that needs to be compiled, it
> still hands the bogus name to the compiler.

I added that code to catch the majority of cases (which it does).
I'm not 100% sure your changes aren't going to lead to severe
confusion. The filenames in .depend files usually come from the
-I path list to the compiler, not the :PATH list to make, so
removing the directory path is unlikely to be useful.

FWIW with gmake you can have a pattern rule (IIRC):

        echo "Ignoring stale dependency for $@"

Unfortunately nmake doesn't have anything of that nature.
(about the only + point for gmake!)


David Laight:

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