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

Git-commit: 6260364cc4bfea9a78867da63be8d4bf50e4a561
References: boo#1171140

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/roms/ipxe/src/Makefile.housekeeping b/roms/ipxe/src/Makefile.housekeeping
index 1b175b9508c0d20f169801f8763d..893bd20f1fd5cecf0e480dee05bd 100644
--- a/roms/ipxe/src/Makefile.housekeeping
+++ b/roms/ipxe/src/Makefile.housekeeping
@@ -422,6 +422,7 @@ CFLAGS		+= -Os
 CFLAGS		+= -g
 ifeq ($(CCTYPE),gcc)
 CFLAGS		+= -ffreestanding
+CFLAGS		+= -fcommon
 CFLAGS		+= -Wall -W -Wformat-nonliteral
 HOST_CFLAGS	+= -Wall -W -Wformat-nonliteral
 endif