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From: Chris Rees <utisoft@gmail.com>
Date: Sun, 13 Feb 2011 14:44:03 +0000
Message-ID: <AANLkTimQk6+4Y8o0M6qPtC_gg157JxruSkAWT+g7TXYq@mail.gmail.com>
To: Helmut Schneider <jumper99@gmx.de>
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Cc: freebsd-ports@freebsd.org
Subject: Re: Makefile, ${VARIABLE}= vs. ${VARIABLE}?=
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On 13 February 2011 14:14, Helmut Schneider <jumper99@gmx.de> wrote:
> Hi,
>
> [helmut@BSDHelmut ~]$ grep -ir latest /usr/ports/www/apache2?
> /usr/ports/www/apache20/Makefile:LATEST_LINK=3D =A0 apache20
> /usr/ports/www/apache22/Makefile:LATEST_LINK?=3D =A0apache22
> [helmut@BSDHelmut ~]$
>
> So, what's the difference between e.g. "LATEST_LINK=3D" and
> "LATEST_LINK?=3D"?
>
> Thanks, Helmut
>

?=3D can be overridden in make.conf or on the command line.

=3D clobbers all previous definitions.

Chris