linux-kernel - [PATCH net] selftests/net: add definition for SOL_DCCP to fix compilation errors for old libc

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Date:   Wed, 18 Mar 2020 18:53:21 +0000
From:   Alan Maguire <alan.maguire@...cle.com>
To:     davem@...emloft.net, kuba@...nel.org, shuah@...nel.org,
        netdev@...r.kernel.org
Cc:     posk@...gle.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Alan Maguire <alan.maguire@...cle.com>
Subject: [PATCH net] selftests/net: add definition for SOL_DCCP to fix compilation errors for old libc

Many systems build/test up-to-date kernels with older libcs, and
an older glibc (2.17) lacks the definition of SOL_DCCP in
/usr/include/bits/socket.h (it was added in the 4.6 timeframe).

Adding the definition to the test program avoids a compilation
failure that gets in the way of building tools/testing/selftests/net.
The test itself will work once the definition is added; either
skipping due to DCCP not being configured in the kernel under test
or passing, so there are no other more up-to-date glibc dependencies
here it seems beyond that missing definition.

Fixes: 11fb60d1089f ("selftests: net: reuseport_addr_any: add DCCP")
Signed-off-by: Alan Maguire <alan.maguire@...cle.com>
---
 tools/testing/selftests/net/reuseport_addr_any.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
index c623393..b8475cb2 100644
--- a/tools/testing/selftests/net/reuseport_addr_any.c
+++ b/tools/testing/selftests/net/reuseport_addr_any.c
@@ -21,6 +21,10 @@
 #include <sys/socket.h>
 #include <unistd.h>

+#ifndef SOL_DCCP
+#define SOL_DCCP 269
+#endif
+
 static const char *IP4_ADDR = "127.0.0.1";
 static const char *IP6_ADDR = "::1";
 static const char *IP4_MAPPED6 = "::ffff:127.0.0.1";
-- 
1.8.3.1