netdev - Re: [PATCH net v2] samples/bpf: fix a build issue

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Date:   Mon, 10 Jul 2017 23:13:10 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Yonghong Song <yhs@...com>, ast@...com, brakmo@...com,
        netdev@...r.kernel.org
CC:     kernel-team@...com
Subject: Re: [PATCH net v2] samples/bpf: fix a build issue

On 07/10/2017 11:04 PM, Yonghong Song wrote:
> With latest net-next:
> ====
> clang  -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/6.3.1/include -I./arch/x86/include -I./arch/x86/include/generated/uapi -I./arch/x86/include/generated  -I./include -I./arch/x86/include/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h  -Isamples/bpf \
>      -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
>      -Wno-compare-distinct-pointer-types \
>      -Wno-gnu-variable-sized-type-not-at-end \
>      -Wno-address-of-packed-member -Wno-tautological-compare \
>      -Wno-unknown-warning-option \
>      -O2 -emit-llvm -c samples/bpf/tcp_synrto_kern.c -o -| llc -march=bpf -filetype=obj -o samples/bpf/tcp_synrto_kern.o
> samples/bpf/tcp_synrto_kern.c:20:10: fatal error: 'bpf_endian.h' file not found
>            ^~~~~~~~~~~~~~
> 1 error generated.
> ====
>
> net has the same issue.
>
> Add support for ntohl and htonl in tools/testing/selftests/bpf/bpf_endian.h.
> Also move bpf_helpers.h from samples/bpf to selftests/bpf and change
> compiler include logic so that programs in samples/bpf can access the headers
> in selftests/bpf, but not the other way around.
>
> Signed-off-by: Yonghong Song <yhs@...com>

LGTM, thanks!

Acked-by: Daniel Borkmann <daniel@...earbox.net>