diff --git a/sys/arch/hp300/stand/Makefile.inc b/sys/arch/hp300/stand/Makefile.inc
index 2979693a1a41..173468293892 100644
--- a/sys/arch/hp300/stand/Makefile.inc
+++ b/sys/arch/hp300/stand/Makefile.inc
@@ -1,7 +1,9 @@
-#	$NetBSD: Makefile.inc,v 1.16 2009/03/15 06:10:03 tsutsui Exp $
+#	$NetBSD: Makefile.inc,v 1.17 2021/04/15 01:54:38 mrg Exp $
 
 BINDIR=			/usr/mdec
 
 release:
 
 S?=		${.CURDIR}/../../../..
+
+COPTS+=		-fcommon
diff --git a/sys/arch/mvme68k/stand/Makefile.booters b/sys/arch/mvme68k/stand/Makefile.booters
index 2e68738e4e49..159881d13adb 100644
--- a/sys/arch/mvme68k/stand/Makefile.booters
+++ b/sys/arch/mvme68k/stand/Makefile.booters
@@ -1,10 +1,11 @@
-#	$NetBSD: Makefile.booters,v 1.26 2017/04/08 19:53:21 christos Exp $
+#	$NetBSD: Makefile.booters,v 1.27 2021/04/15 01:54:39 mrg Exp $
 
 S?=		${.CURDIR}/../../../..
 MDEC_DIR?=	/usr/mdec
 RELOC?=		0x3F0000
 COPTS?=		-Os -Wall -Wno-main -Wmissing-prototypes -Wstrict-prototypes \
-		-ffreestanding -fomit-frame-pointer -fno-unwind-tables
+		-ffreestanding -fomit-frame-pointer -fno-unwind-tables \
+		-fcommon
 DEFS?= 
 STRIPFLAG?=
 
diff --git a/sys/arch/sgimips/stand/Makefile.inc b/sys/arch/sgimips/stand/Makefile.inc
index f3d4c56677d6..671eb2242ccd 100644
--- a/sys/arch/sgimips/stand/Makefile.inc
+++ b/sys/arch/sgimips/stand/Makefile.inc
@@ -1,9 +1,11 @@
-# $NetBSD: Makefile.inc,v 1.3 2019/01/02 03:04:26 tsutsui Exp $
+# $NetBSD: Makefile.inc,v 1.4 2021/04/15 01:54:39 mrg Exp $
 
 NOPIE=	# defined
 
 BINDIR?=	/usr/mdec
 
+COPTS+=		-fcommon
+
 # XXX SHOULD NOT NEED TO DEFINE THESE!
 LIBCRT0=
 LIBCRTI=
diff --git a/sys/arch/x68k/stand/Makefile.inc b/sys/arch/x68k/stand/Makefile.inc
index c7128017d6f6..7d8e5bc52f50 100644
--- a/sys/arch/x68k/stand/Makefile.inc
+++ b/sys/arch/x68k/stand/Makefile.inc
@@ -1,3 +1,3 @@
-#	$NetBSD: Makefile.inc,v 1.3 2020/08/10 07:00:49 rin Exp $
+#	$NetBSD: Makefile.inc,v 1.4 2021/04/15 01:54:39 mrg Exp $
 
-DBG=-Os -fno-unwind-tables -Wno-attributes
+DBG=-Os -fno-unwind-tables -Wno-attributes -fcommon