Subject: Fix build breakage with gcc-10 / -fno-common
Author: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
Date: 2020-04-19
Bug-Debian: https://bugs.debian.org/957908
Forwarded: https://sourceforge.net/p/aoetools/mailman/message/36986207/

--- a/dat.h
+++ b/dat.h
@@ -163,12 +163,12 @@
 	Nserial= 20,
 };
 
-int	shelf, slot;
-ulong	aoetag;
-uchar	mac[6];
-int	bfd;		// block file descriptor
-int	sfd;		// socket file descriptor
-vlong	size;		// size of vblade
-vlong	offset;
-char	*progname;
-char	serial[Nserial+1];
+extern int	shelf, slot;
+extern ulong	aoetag;
+extern uchar	mac[6];
+extern int	bfd;		// block file descriptor
+extern int	sfd;		// socket file descriptor
+extern vlong	size;		// size of vblade
+extern vlong	offset;
+extern char	*progname;
+extern char	serial[Nserial+1];
--- a/aoe.c
+++ b/aoe.c
@@ -28,6 +28,16 @@
 char *ifname;
 int bufcnt = Bufcount;
 
+int	shelf, slot;
+ulong	aoetag;
+uchar	mac[6];
+int	bfd;		// block file descriptor
+int	sfd;		// socket file descriptor
+vlong	size;		// size of vblade
+vlong	offset;
+char	*progname;
+char	serial[Nserial+1];
+
 void
 aoead(int fd)	// advertise the virtual blade
 {