Date: Sun, 13 Feb 2011 14:54:12 +0000 (UTC)
From: "Helmut Schneider" <jumper99@gmx.de>
To: freebsd-ports@freebsd.org
Subject: Re: Makefile, ${VARIABLE}= vs. ${VARIABLE}?=
Message-ID: <xn0habohx1ksbmz009@news.gmane.org>
References: <xn0habnig1jczkg007@news.gmane.org> <AANLkTimQk6%2B4Y8o0M6qPtC_gg157JxruSkAWT%2Bg7TXYq@mail.gmail.com>
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Chris Rees wrote: > On 13 February 2011 14:14, Helmut Schneider <jumper99@gmx.de> wrote: > > [helmut@BSDHelmut ~]$ 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?="? > > ?= can be overridden in make.conf or on the command line. Is it up to the maintainer to decide which variables shall be overwritable, or are there rules?
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