From 4ce42974267dd969a597a7357d6c98ccbe8140f8 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Mon, 17 Aug 2020 20:41:29 +0200
Subject: [PATCH] src/interface.h: fix build with gcc 10

This will fix the following build failure:

/home/buildroot/autobuild/instance-1/output-1/host/bin/arm-buildroot-linux-gnueabihf-gcc -D_REENTRANT  -DSYSCONFDIR="\"/etc\"" -D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os   -pipe -W -Wall -Wno-unused-parameter   -o ifplugstatus ifplugstatus.o interface.o -L/home/buildroot/autobuild/instance-1/output-1/host/bin/../arm-buildroot-linux-gnueabihf/sysroot/usr/lib -ldaemon
/home/buildroot/autobuild/instance-1/output-1/host/lib/gcc/arm-buildroot-linux-gnueabihf/10.2.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: interface.o:(.bss+0x0): multiple definition of `interface_do_message'; ifplugstatus.o:(.bss+0xc): first defined here
/home/buildroot/autobuild/instance-1/output-1/host/lib/gcc/arm-buildroot-linux-gnueabihf/10.2.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: interface.o:(.bss+0x4): multiple definition of `interface_auto_up'; ifplugstatus.o:(.bss+0x4): first defined here

Fixes:
 - http://autobuild.buildroot.org/results/63f7c6fc4a2a30c8eb0298856a2615f816d50299

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Upstream status: sent to Lennart Poettering <lennart@poettering.net>]
---
 src/interface.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/interface.h b/src/interface.h
index 2f35a84..e603844 100644
--- a/src/interface.h
+++ b/src/interface.h
@@ -21,8 +21,8 @@
  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  */
 
-int interface_auto_up;
-int interface_do_message;
+extern int interface_auto_up;
+extern int interface_do_message;
 
 typedef enum { IFSTATUS_UP, IFSTATUS_DOWN, IFSTATUS_ERR } interface_status_t;
 
-- 
2.27.0