===> Generating patch
===> Viewing diff with ydiff -s -w 0
diff -ruN ../simh.orig/Makefile ./Makefile
--- ../simh.orig/Makefile	2020-08-20 14:58:44.372056000 +0100
+++ ./Makefile	2020-08-20 15:00:23.971199000 +0100
@@ -3,7 +3,7 @@
 
 PORTNAME=	simh
 PORTVERSION=	3.9.0
-PORTREVISION=	4
+PORTREVISION=	5
 CATEGORIES=	emulators
 MASTER_SITES=	http://simh.trailing-edge.com/sources/:src \
 		http://www.ml1.org.uk/distfiles/:pdf \
@@ -21,7 +21,7 @@
 
 USES=		gmake dos2unix zip
 DOS2UNIX_GLOB=	*.c *.h *.txt *.mak *.ini makefile
-CFLAGS+=	-Wno-format-extra-args -Wno-comment
+CFLAGS+=	-Wno-format-extra-args -Wno-comment -fcommon
 MAKE_ENV=	GCC="${CC}" CFLAGS_O="${CFLAGS}" USE_NETWORK=1
 MAKEFILE=	makefile
 
====> Cleaning up
===> Done