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From: Mikhail Teterin <mi+kde@aldan.algebra.com>
To: Adam Weinberger <adamw@magnesium.net>
Date: Wed, 27 Jul 2005 01:48:45 -0400
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Cc: ports@freebsd.org, Mark Linimon <linimon@lonesome.com>
Subject: Re: a portlint dilemma
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On Wednesday 27 July 2005 01:17 am, Adam Weinberger wrote:
= That is indeed a very good - albeit sneaky - trick!

I wonder, what portlint's intention is in this case. Is it to really
prevent things like I wanted in GraphicsMagick or just to make ports'
Makefiles more uniform (in which case this should be a warning, not a
"fatal" error).

= The main problem that I find with the OPTIONS chicken-and-egg problem
= is that you can't modify OPTIONS based on the presence of files
= because, when OPTIONS processing takes place, LOCALBASE and X11BASE
= aren't defined. Do you have a good sneaky trick for that case?

There is no chicken-and-egg problem, because the variables are not
expanded until used (or until assigned to others with ``:='').

How about:

	OPTIONS=MEOW "Use libMEOW for additional purring?" ${MEOW}

	.include <bsd.ports.pre.mk>
	.if exists(${LOCALBASE}/lib/libMEOW.so)
	MEOW=	on
	.else
	MEOW=	off
	.endif
	.include <bsd.ports.post.mk>

Does this work? Is it, what you are asking about?

	-mi