> > AFAICT, diff and patch preserve file modification times.
>
> I just tested with patch 2.5 -- it does not (not by default anyhow,
> there might be a flag to tell it to do so, but I can't see one
> specifically for this purpose).
I think we're talking at cross purposes. By default, patch sets the mtime on
patched files to the current time. There're options -T and -Z which will set
the time on the patched files to the mtime stored in the (context) diff, but
this is generally Wrong. The default behaviour should work just fine -- all
the changed source and header files will appear newer than the object files
that depend on them, so there should be no problem.
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