distcc: add a runit service; add a systemd build option.

srcpkgs/distcc/files/run

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec distccd --no-detach --daemon --user nobody --no-fork --allow 127.0.0.1

srcpkgs/distcc/template

@@ -1,7 +1,8 @@
 # Template file for 'distcc'
 pkgname=distcc
 version=3.2rc1
-revision=6
+revision=7
+build_options="systemd"
 build_style=gnu-configure
 configure_args="--disable-Werror --with-gtk"
 hostmakedepends="pkg-config"
@@ -24,7 +25,11 @@ post_install() {
 	rm -rf ${DESTDIR}/usr/share/doc/distcc/example
 
 	# systemd service
-	vinstall ${FILESDIR}/distccd.service 644 usr/lib/systemd/system
+	if [ "$build_option_systemd" ]; then
+		vinstall ${FILESDIR}/distccd.service 644 usr/lib/systemd/system
+	fi
+	vinstall ${FILESDIR}/run 755 etc/sv/distccd
+	ln -s /run/runit/supervise.distccd ${DESTDIR}/etc/sv/distccd/supervise
 
 	# gcc wrappers	
 	vmkdir usr/lib/distcc/bin