Date: Sun, 13 Feb 2011 14:27:08 +0000
From: Bob Eager <rde@tavi.co.uk>
To: freebsd-ports@freebsd.org
Subject: Re: Makefile, ${VARIABLE}= vs. ${VARIABLE}?=
Message-ID: <20110213142708.5845a908@raksha.tavi.co.uk>
In-Reply-To: <xn0habnig1jczkg007@news.gmane.org>
References: <xn0habnig1jczkg007@news.gmane.org>
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On Sun, 13 Feb 2011 14:14:17 +0000 (UTC) "Helmut Schneider" <jumper99@gmx.de> wrote: > Hi, > > [helmut@BSDHelmut ~]$ grep -ir latest /usr/ports/www/apache2? > /usr/ports/www/apache20/Makefile:LATEST_LINK= apache20 > /usr/ports/www/apache22/Makefile:LATEST_LINK?= apache22 > [helmut@BSDHelmut ~]$ > > So, what's the difference between e.g. "LATEST_LINK=" and > "LATEST_LINK?="? As it says in the man page... "Assign the value to the variable if it is not already defined"
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