bpf_helpers.h has been moved to tools/lib/bpf since 5.10, so add more
incliding path.

Fixes: edae34a3ed92 ("selftests net: add UDP GRO fraglist + bpf self-tests")
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Lina Wang <lina.wang@mediatek.com>
---
 tools/testing/selftests/net/bpf/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/net/bpf/Makefile b/tools/testing/selftests/net/bpf/Makefile
index f91bf14bbee7..070251986dbe 100644
--- a/tools/testing/selftests/net/bpf/Makefile
+++ b/tools/testing/selftests/net/bpf/Makefile
@@ -2,6 +2,7 @@
 
 CLANG ?= clang
 CCINCLUDE += -I../../bpf
+CCINCLUDE += -I../../../../lib
 CCINCLUDE += -I../../../../../usr/include/
 
 TEST_CUSTOM_PROGS = $(OUTPUT)/bpf/nat6to4.o
-- 
2.18.0

On 5/30/22 8:21 AM, Lina Wang wrote:
> bpf_helpers.h has been moved to tools/lib/bpf since 5.10, so add more
> incliding path.
> 
> Fixes: edae34a3ed92 ("selftests net: add UDP GRO fraglist + bpf self-tests")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Signed-off-by: Lina Wang <lina.wang@mediatek.com>
> ---
>   tools/testing/selftests/net/bpf/Makefile | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/tools/testing/selftests/net/bpf/Makefile b/tools/testing/selftests/net/bpf/Makefile
> index f91bf14bbee7..070251986dbe 100644
> --- a/tools/testing/selftests/net/bpf/Makefile
> +++ b/tools/testing/selftests/net/bpf/Makefile
> @@ -2,6 +2,7 @@
>   
>   CLANG ?= clang
>   CCINCLUDE += -I../../bpf
> +CCINCLUDE += -I../../../../lib
>   CCINCLUDE += -I../../../../../usr/include/
>   
>   TEST_CUSTOM_PROGS = $(OUTPUT)/bpf/nat6to4.o
> 

 From building the selftest in general, I'm getting:

clang -O2 -target bpf -c bpf/nat6to4.c -I../../bpf -I../../../../lib -I../../../../../usr/include/ -o /root/daniel/bpf/tools/testing/selftests/net/bpf/nat6to4.o
In file included from bpf/nat6to4.c:27:
In file included from /usr/include/linux/bpf.h:11:
/usr/include/linux/types.h:5:10: fatal error: 'asm/types.h' file not found
#include <asm/types.h>
          ^~~~~~~~~~~~~
1 error generated.

Could we reuse the build infra from tools/testing/selftests/bpf/ for nat6to4.c?

On Wed, 2022-06-01 at 01:01 +0200, Daniel Borkmann wrote:
> On 5/30/22 8:21 AM, Lina Wang wrote:
> clang -O2 -target bpf -c bpf/nat6to4.c -I../../bpf -I../../../../lib
> -I../../../../../usr/include/ -o
> /root/daniel/bpf/tools/testing/selftests/net/bpf/nat6to4.o
> In file included from bpf/nat6to4.c:27:
> In file included from /usr/include/linux/bpf.h:11:
> /usr/include/linux/types.h:5:10: fatal error: 'asm/types.h' file not
> found
> #include <asm/types.h>
>           ^~~~~~~~~~~~~
> 1 error generated.

maybe your pc is ubuntu or Debian, you should apt-get install gcc-multilib, 
guys on the internet meets the same problem when build libbpf related, just
install gcc-multilib package

> Could we reuse the build infra from tools/testing/selftests/bpf/ for nat6to4.c?

We discussed it before, please refer to https://patchwork.kernel.org/project/netdevbpf/patch/20220407084727.10241-1-lina.wang@mediatek.com/

Thanks!

On Sun, May 29, 2022 at 11:28 PM Lina Wang <lina.wang@mediatek.com> wrote:
>
> bpf_helpers.h has been moved to tools/lib/bpf since 5.10, so add more
> incliding path.
nit:  including

>
> Fixes: edae34a3ed92 ("selftests net: add UDP GRO fraglist + bpf self-tests")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Signed-off-by: Lina Wang <lina.wang@mediatek.com>

Acked-by: Song Liu <songliubraving@fb.com>


> ---
>  tools/testing/selftests/net/bpf/Makefile | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/tools/testing/selftests/net/bpf/Makefile b/tools/testing/selftests/net/bpf/Makefile
> index f91bf14bbee7..070251986dbe 100644
> --- a/tools/testing/selftests/net/bpf/Makefile
> +++ b/tools/testing/selftests/net/bpf/Makefile
> @@ -2,6 +2,7 @@
>
>  CLANG ?= clang
>  CCINCLUDE += -I../../bpf
> +CCINCLUDE += -I../../../../lib
>  CCINCLUDE += -I../../../../../usr/include/
>
>  TEST_CUSTOM_PROGS = $(OUTPUT)/bpf/nat6to4.o
> --
> 2.18.0
>