From owner-freebsd-ports@FreeBSD.ORG  Tue Mar  8 21:02:18 2011
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From: naddy@mips.inka.de (Christian Weisgerber)
Date: Tue, 8 Mar 2011 21:02:15 +0000 (UTC)
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Originator: naddy@mips.inka.de (Christian Weisgerber)
To: freebsd-ports@freebsd.org
Subject: Re: Creating a new port, overriding a Makefile variable
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Chris Rees <utisoft@gmail.com> wrote:

> >> In the port Makefile I've tried to use MAKE_ENV= MANPREFIX=/man to
> >> override it, but it seems it's ignored.
> 
> MAKE_ARGS= -EMANPREFIX
> MAKE_ENV= MANPREFIX=/man
> 
> NB gmake doesn't have the -E flag, but the -e flag sets environment
> precedence on all variables. Sounds risky!

Just use

MAKE_ARGS= MANPREFIX=/man

Variables set on the command line override Makefile settings.
(So says POSIX.)

-- 
Christian "naddy" Weisgerber                          naddy@mips.inka.de