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[bpf-next,v1,12/19] selftests/bpf: Fix compiling kfree_skb.c with musl-libc

Message ID e2d8cedc790959c10d6822a51f01a7a3616bea1b.1721713597.git.tony.ambardar@gmail.com (mailing list archive)
State Accepted
Commit bae9a5ce7d3a9b3a9e07b31ab9e9c58450e3e9fd
Headers show
Series selftests/bpf: Improve libc portability / musl support (part 1) | expand

Commit Message

Tony Ambardar July 23, 2024, 5:54 a.m. UTC 
The GNU version of 'struct tcphdr' with member 'doff' is not exposed by
musl headers unless _GNU_SOURCE is defined. Add this definition to fix
errors seen compiling for mips64el/musl-libc:

  In file included from kfree_skb.c:2:
  kfree_skb.c: In function 'on_sample':
  kfree_skb.c:45:30: error: 'struct tcphdr' has no member named 'doff'
     45 |         if (CHECK(pkt_v6->tcp.doff != 5, "check_tcp",
        |                              ^

Fixes: 580d656d80cf ("selftests/bpf: Add kfree_skb raw_tp test")
Signed-off-by: Tony Ambardar <tony.ambardar@gmail.com>
---
 tools/testing/selftests/bpf/prog_tests/kfree_skb.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/tools/testing/selftests/bpf/prog_tests/kfree_skb.c b/tools/testing/selftests/bpf/prog_tests/kfree_skb.c
index c07991544a78..34f8822fd221 100644
--- a/tools/testing/selftests/bpf/prog_tests/kfree_skb.c
+++ b/tools/testing/selftests/bpf/prog_tests/kfree_skb.c
@@ -1,4 +1,5 @@ 
 // SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
 #include <test_progs.h>
 #include <network_helpers.h>
 #include "kfree_skb.skel.h"