From mboxrd@z Thu Jan  1 00:00:00 1970
To: 9fans@cse.psu.edu
Subject: Re: [9fans] mk surprises me
From: forsyth@caldo.demon.co.uk
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Date: Wed, 27 Mar 2002 14:10:48 +0000
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>>% : hdr.h

i suspect that because you've said that everything depends on hdr.h, including f2.c,
it decides it had better remake that too, since hdr.h has changed, but doesn't know how.

try using & for this (similar to % but doesn't match . or /)

&: hdr.h

&: &.c
	cp $stem.c $target

otherwise you could use regular expression rules