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buildroot/buildroot-2016.08.1/package/conntrack-tools/0001-src-fix-build-with-musl-libc.patch 973 Bytes
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  From d7b20d9bbed23a7a7e40af2f5e78f37ff67e8d93 Mon Sep 17 00:00:00 2001
  From: Rodrigo Rebello <rprebello@gmail.com>
  Date: Mon, 23 Nov 2015 02:12:48 -0200
  Subject: [PATCH] src: fix build with musl libc
  
  The GNU version of 'struct tcphdr' is not exposed by musl libc headers
  unless _GNU_SOURCE is defined. Without this definition, the build fails
  with:
  
    rpc.c: In function 'rpc_helper_cb':
    rpc.c:351:15: error: 'struct tcphdr' has no member named 'doff'
       offset += th->doff * 4;
                   ^
  
  Upstream status: sent
  http://patchwork.ozlabs.org/patch/547376/
  
  Signed-off-by: Rodrigo Rebello <rprebello@gmail.com>
  ---
   src/helpers/rpc.c | 1 +
   1 file changed, 1 insertion(+)
  
  diff --git a/src/helpers/rpc.c b/src/helpers/rpc.c
  index 82493c2..3a7b337 100644
  --- a/src/helpers/rpc.c
  +++ b/src/helpers/rpc.c
  @@ -28,6 +28,7 @@
   
   #include <rpc/rpc_msg.h>
   #include <rpc/pmap_prot.h>
  +#define _GNU_SOURCE
   #include <netinet/tcp.h>
   #include <netinet/udp.h>
   
  -- 
  2.1.4