From a334c296e02852880148abf92abf12c63ed49b3b Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Sun, 8 Apr 2012 15:56:00 +0200
Subject: [PATCH] make sure we still build on systems that don't have
 IPPROTO_GRE

---
 openbsc/src/libcommon/socket.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/openbsc/src/libcommon/socket.c b/openbsc/src/libcommon/socket.c
index 6c47a8d13..2a64767f8 100644
--- a/openbsc/src/libcommon/socket.c
+++ b/openbsc/src/libcommon/socket.c
@@ -54,9 +54,11 @@ int make_sock(struct osmo_fd *bfd, int proto,
 	case IPPROTO_UDP:
 		type = SOCK_DGRAM;
 		break;
+#ifdef IPPROTO_GRE
 	case IPPROTO_GRE:
 		type = SOCK_RAW;
 		break;
+#endif
 	default:
 		return -EINVAL;
 	}