buildroot/package/iptables/0001-utils-nfsynproxy-fix-build-with-musl-libc.patch

From 06e0312d0bfd1f0b9e7c23ab654f18524d49e86b Mon Sep 17 00:00:00 2001
From: Baruch Siach <baruch@tkos.co.il>
Date: Thu, 2 Mar 2017 09:20:48 +0200
Subject: [PATCH] utils: nfsynproxy: fix build with musl libc

The musl libc exposes some struct tcphdr field only when _GNU_SOURCE is
defined. Fix the following build failure:

nfsynproxy.c: In function ‘parse_packet’:
nfsynproxy.c:34:9: error: ‘const struct tcphdr’ has no member named ‘syn’
  if (!th->syn || !th->ack)
         ^
nfsynproxy.c:34:21: error: ‘const struct tcphdr’ has no member named ‘ack’
  if (!th->syn || !th->ack)
                     ^
nfsynproxy.c:42:8: error: ‘const struct tcphdr’ has no member named ‘res2’
  if (th->res2 == 0x1)
        ^
nfsynproxy.c:45:13: error: ‘const struct tcphdr’ has no member named ‘doff’
  length = th->doff * 4 - sizeof(*th);
             ^

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
Upstream status: pending (http://patchwork.ozlabs.org/patch/734503/)

 utils/nfsynproxy.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/utils/nfsynproxy.c b/utils/nfsynproxy.c
index baedc92c5d9f..bf5c416340f1 100644
--- a/utils/nfsynproxy.c
+++ b/utils/nfsynproxy.c
@@ -6,6 +6,7 @@
  * published by the Free Software Foundation.
  */
 
+#define _GNU_SOURCE
 #include <stdlib.h>
 #include <stdbool.h>
 #include <unistd.h>
-- 
2.11.0