all: fix build on CentOS 6 by checking presence of several macros

Protect usage of macros not present in pre-3.x kernels.

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 2 insertions, 0 deletions

diff --git a/dev.c b/dev.c
index 5a43643..2960976 100644
--- a/dev.c
+++ b/dev.c
@@ -385,8 +385,10 @@ const char *device_type2str(uint16_t type)
 		return "phonet";
 	case ARPHRD_PHONET_PIPE:
 		return "phonet_pipe";
+#if defined(ARPHRD_CAIF)
 	case ARPHRD_CAIF:
 		return "caif";
+#endif
 	case ARPHRD_IP6GRE:
 		return "ip6gre";
 	case ARPHRD_NETLINK: