Add quartz variant.

Requested by:		Hadley Wickham <h.wickham@gmail.com>

git-svn-id: https://svn.macports.org/repository/macports/trunk/dports@19342 d073be05-634f-4543-b044-5fe20cf6d1d6

x11/gtk2/Portfile

@@ -3,6 +3,7 @@
 PortSystem 1.0
 name		gtk2
 version		2.10.2
+revision	1
 categories	x11
 maintainers	mij@opendarwin.org
 description	Gimp ToolKit version 2
@@ -26,6 +27,15 @@ use_bzip2	yes
 depends_lib	port:glib2 port:tiff port:libpng port:atk port:pango \
 		port:gettext lib:libX11.6:XFree86
 
+pre-configure {
+	if {[variant_isset quartz]} {
+		if { ![file exists ${prefix}/include/cairo/cairo-quartz.h] } {
+			ui_msg "\nYou must first build cairo with the quartz variant enabled.  Please\nuninstall (or deactivate) the cairo port and reinstall by running:\n\n\"port install cairo +quartz\"\n"
+			exit 1
+		}
+	}
+}
+
 configure.env	LDFLAGS="-L${prefix}/lib -lpango-1.0" \
 		CPPFLAGS="-I${prefix}/include -no-cpp-precomp -DX_LOCALE" \
 		CFLAGS="-O3 -funroll-loops -fstrict-aliasing"
@@ -37,6 +47,8 @@ build.args	CFLAGS+="-I${x11prefix}/include"
 
 platform darwin 6 { patchfiles-append patch-gtk-xdgmime-xdgmimemagic.c }
 
+variant quartz { configure.args-append --enable-gdktarget=quartz }
+
 post-patch	{ reinplace "s|xdg_data_dirs = \"/usr|xdg_data_dirs = \"${prefix}/share:/usr|g" ${worksrcpath}/gtk/xdgmime/xdgmime.c
 		  reinplace "s|g_strdup (\"/usr|g_strdup (\"${prefix}|g" ${worksrcpath}/gtk/gtkicontheme.c }