When building the kernel and selftest with clang compiler (llvm17 or llvm18),
I hit the following compilation failure:
In file included from progs/test_lwt_redirect.c:3:
In file included from /usr/include/linux/ip.h:21:
In file included from /usr/include/asm/byteorder.h:5:
In file included from /usr/include/linux/byteorder/little_endian.h:13:
/usr/include/linux/swab.h:136:8: error: unknown type name '__always_inline'
136 | static __always_inline unsigned long __swab(const unsigned long y)
| ^
/usr/include/linux/swab.h:171:8: error: unknown type name '__always_inline'
171 | static __always_inline __u16 __swab16p(const __u16 *p)
...
bpf_helpers.h file provided a definition for __always_inline.
Putting 'ip.h' after 'bpf_helpers.h' fixed the issue.
Signed-off-by: Yonghong Song <yonghong.song@xxxxxxxxx>
---
tools/testing/selftests/bpf/progs/test_lwt_redirect.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/progs/test_lwt_redirect.c b/tools/testing/selftests/bpf/progs/test_lwt_redirect.c
index 7ab1fd310efb..8c895122f293 100644
--- a/tools/testing/selftests/bpf/progs/test_lwt_redirect.c
+++ b/tools/testing/selftests/bpf/progs/test_lwt_redirect.c
@@ -1,8 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
-#include <linux/ip.h>
#include <bpf/bpf_endian.h>
#include <bpf/bpf_helpers.h>
+#include <linux/ip.h>
#include "bpf_tracing_net.h"
/* We don't care about whether the packet can be received by network stack.
--
2.34.1
