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substitution in many files

From: Dave C
Subject: substitution in many files
Date: Tue, 18 Sep 2012 09:08:00 -0700 (PDT)

I want to use gnu make to make edits to many files.  In each file, I want to 
substitute the string:


to the string


There could be several instances of this string on one line in the files.

I can do this in perl with:

perl -i -pe 's|\.\/|\${MPATH}\/|g'

but when I put this into a make target, I can not get the character escaping 
right.  The shell always ends up interpreting $MPATH as an empty variable.

Is there a good way to do this in gmake?


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