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From: "Helmut Schneider" <jumper99@gmx.de>
Date: Tue, 24 May 2011 19:39:11 +0000 (UTC)
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Subject: ${CD}
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Hi,

I need 'cd' in my Makefile. It seems that the variable ${CD} is not
defined and people are using 'cd' instead.

Is there a certain reason for that?

Thanks, Helmut