[PATCH 1/1] sandbox: eth-raw: fix building with musl library

[Heinrich Schuchardt]

The definition of struct udphdr in include netinet/udp.h in the
musl library differs from the definition in the glibc library.

To use the same definition with musl the symbol _GNU_SOURCE has
to be defined.

Reported-by: Milan P. Stanić <mps at arvanta.net>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
 arch/sandbox/cpu/eth-raw-os.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/sandbox/cpu/eth-raw-os.c b/arch/sandbox/cpu/eth-raw-os.c
index 6a8d809756..e59b96be5f 100644
--- a/arch/sandbox/cpu/eth-raw-os.c
+++ b/arch/sandbox/cpu/eth-raw-os.c
@@ -4,6 +4,8 @@
  * Copyright (c) 2015-2018 Joe Hershberger <joe.hershberger at ni.com>
  */
 
+#define _GNU_SOURCE
+
 #include <asm/eth-raw-os.h>
 #include <errno.h>
 #include <fcntl.h>
-- 
2.33.1