Date: Sun, 13 Feb 2011 19:22:08 +0300
From: Anonymous <swell.k@gmail.com>
To: Chris Rees <utisoft@gmail.com>
Cc: Helmut Schneider <jumper99@gmx.de>, freebsd-ports@freebsd.org
Subject: Re: Makefile, ${VARIABLE}= vs. ${VARIABLE}?=
Message-ID: <86y65jewgf.fsf@gmail.com>
In-Reply-To: <AANLkTimQk6%2B4Y8o0M6qPtC_gg157JxruSkAWT%2Bg7TXYq@mail.gmail.com> (Chris Rees's message of "Sun, 13 Feb 2011 14:44:03 %2B0000")
References: <xn0habnig1jczkg007@news.gmane.org> <AANLkTimQk6%2B4Y8o0M6qPtC_gg157JxruSkAWT%2Bg7TXYq@mail.gmail.com>
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Chris Rees <utisoft@gmail.com> writes: > On 13 February 2011 14:14, Helmut Schneider <jumper99@gmx.de> wrote: >> Hi, >> >> [helmut@BSDHelmut ~]$ 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?="? Slave ports use different LATEST_LINK, e.g. www/apache22-worker-mpm. > ?= can be overridden in make.conf or on the command line. `=' and `:=' can be overriden via command line, too. > = clobbers all previous definitions.
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