[patch] devel/libgsf: make GCONF really OPTIONal

[Alexey Dokuchaev]

hi there,

it's a bit inconvenient to manually specify WITHOUT_GCONF every time i
build devel/libgsf.  mind if i commit attached patch?

./danfe
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Index: Makefile
===================================================================
--- Makefile	(revision 312694)
+++ Makefile	(working copy)
@@ -1,10 +1,6 @@
-# New ports collection makefile for:	libgsf
-# Date created:				11 September 2002
-# Whom:					Maxim Sobolev <sobomax at FreeBSD.org>
-#
+# Created by: Maxim Sobolev <sobomax at FreeBSD.org>
 # $FreeBSD$
 #   $MCom: ports/devel/libgsf/Makefile,v 1.35 2010/04/10 08:51:15 kwm Exp $
-#
 
 PORTNAME=	libgsf
 PORTVERSION=	1.14.21
@@ -14,7 +10,7 @@
 DIST_SUBDIR=	gnome2
 
 MAINTAINER=	gnome at FreeBSD.org
-COMMENT?=	An extensible i/o abstraction for dealing with structured file formats
+COMMENT?=	Extensible I/O abstraction for dealing with structured file formats
 
 .if !exists(/usr/lib/libbz2.so)
 LIB_DEPENDS+=	bz2.1:${PORTSDIR}/archivers/bzip2
@@ -35,7 +31,12 @@
 MAN1=		gsf.1 gsf-office-thumbnailer.1 gsf-vba-dump.1
 .endif
 
-.if !defined(WITHOUT_GCONF) || exists(${LOCALBASE}/bin/gconftool-2)
+OPTIONS_DEFINE=	GCONF
+OPTIONS_DEFAULT=	GCONF
+
+.include <bsd.port.options.mk>
+
+.if ${PORT_OPTIONS:MGCONF} || exists(${LOCALBASE}/bin/gconftool-2)
 USE_GNOME+=	gconf2
 PLIST_SUB+=	THUMB=""
 . if !defined(GSF_SLAVE)