--- Makefile	2014-07-09 01:01:48.000000000 +0200
+++ Makefile	2014-08-06 11:12:32.000000000 +0200
@@ -3,6 +3,7 @@ 
 
 PORTNAME=	gc
 PORTVERSION=	7.4.2
+PORTREVISION=	1
 CATEGORIES=	devel
 MASTER_SITES=	http://www.hboehm.info/gc/gc_source/
 PKGNAMEPREFIX=	boehm-
@@ -58,6 +59,10 @@ 
 
 NOT_FOR_ARCHS=	ia64
 
+# no rule to get .lo from .S in subdirectory
+pre-build:
+	${LN} -sf ${WRKSRC}/src/sparc_mach_dep.S ${WRKSRC}
+
 .if ${PORT_OPTIONS:MDEBUG}
 CONFIGURE_ARGS+=--enable-gc-debug
 PKGNAMESUFFIX:=	${PKGNAMESUFFIX}+fulldebug