examples: nft-rule-add: Fix compile on musl libc

Without `_GNU_SOURCE`, the `dest` field on `tcphdr` is not present:

nft-rule-add.c: In function 'setup_rule':
nft-rule-add.c:108:21: error: 'struct tcphdr' has no member named 'dest'

Signed-off-by: Anna Wilcox <AWilcox@Wilcox-Tech.com>
Signed-off-by: Florian Westphal <fw@strlen.de>

diff --git a/examples/nft-rule-add.c b/examples/nft-rule-add.c
index 937b4366a29b86470ceb38e15e3a93b8628b5ad2..486544ae3a376aee5cc0337157b4cf5bac3066a9 100644 (file)
--- a/examples/nft-rule-add.c
+++ b/examples/nft-rule-add.c
@@ -5,6 +5,7 @@
  * This software has been sponsored by Sophos Astaro <http://www.sophos.com>
  */
 
+#define _GNU_SOURCE    /* for tcphdr.dest */
 #include <stdlib.h>
 #include <time.h>
 #include <string.h>