Add -fno-common to debugging CFLAGS.

Declare udp_dhcp_len as extern.
Include common to get _packed definition.

3 files changed, 4 insertions, 2 deletions

diff --git a/dhcp.h b/dhcp.h
index 85845f04..a53e2922 100644
--- a/dhcp.h
+++ b/dhcp.h
@@ -33,6 +33,8 @@
 
 #include <stdint.h>
 
+#include "common.h"
+
 /* Max MTU - defines dhcp option length */
 #define MTU_MAX             1500
 #define MTU_MIN             576
diff --git a/mk/cc.mk b/mk/cc.mk
index 0d572d3a..380cffd0 100644
--- a/mk/cc.mk
+++ b/mk/cc.mk
@@ -18,7 +18,7 @@ _CCFLAGS=	-Wall -Wextra -Wimplicit -Wshadow -Wformat=2 \
 		-Wredundant-decls  -Wnested-externs \
 		-Winline -Wwrite-strings -Wcast-align -Wcast-qual \
 		-Wpointer-arith \
-		-Wdeclaration-after-statement -Wsequence-point
+		-Wdeclaration-after-statement -Wsequence-point -fno-common
 _CC_FLAGS_SH=	if ! test -d .git; then echo ""; else for f in ${_CCFLAGS}; do \
 		if echo "int main(void) { return 0;} " | \
 		${CC} $$f -S -xc -o /dev/null - ; \
diff --git a/net.h b/net.h
index 7c7c24c6..ba5d6d13 100644
--- a/net.h
+++ b/net.h
@@ -130,7 +130,7 @@ int if_route(const struct interface *, const struct in_addr *,
 void free_routes(struct rt *);
 
 int open_udp_socket(struct interface *);
-const size_t udp_dhcp_len;
+extern const size_t udp_dhcp_len;
 ssize_t make_udp_packet(uint8_t **, const uint8_t *, size_t,
     struct in_addr, struct in_addr);
 ssize_t get_udp_data(const uint8_t **, const uint8_t *);