From f982a712979619dbae2c6e0d741757e2ce94be11 Mon Sep 17 00:00:00 2001
From: Bruce Rogers <brogers@suse.com>
Date: Wed, 6 May 2020 15:03:02 -0600
Subject: [PATCH] [build] Be explicit about -fcommon compiler directive

gcc10 switched default behavior from -fcommon to -fno-common.  Since
"__shared" relies on the legacy behavior, explicitly specify it.

Signed-off-by: Bruce Rogers <brogers@suse.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
---
 src/Makefile.housekeeping | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Makefile.housekeeping b/src/Makefile.housekeeping
index 66d6dd449..b6c61c112 100644
--- a/src/Makefile.housekeeping
+++ b/src/Makefile.housekeeping
@@ -418,6 +418,7 @@ CFLAGS		+= -Os
 CFLAGS		+= -g
 ifeq ($(CCTYPE),gcc)
 CFLAGS		+= -ffreestanding
+CFLAGS		+= -fcommon
 CFLAGS		+= -Wall -W -Wformat-nonliteral
 HOST_CFLAGS	+= -Wall -W -Wformat-nonliteral
 endif