netdev - Re: [PATCH v2 bpf-next 2/2] selftests/bpf: add byte swapping selftest

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Message-ID: <cd88906d-2ca7-e37b-9214-6094571d41fc@iogearbox.net>
Date:   Tue, 30 Jun 2020 16:09:16 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Andrii Nakryiko <andriin@...com>, bpf@...r.kernel.org,
        netdev@...r.kernel.org, ast@...com
Cc:     andrii.nakryiko@...il.com, kernel-team@...com
Subject: Re: [PATCH v2 bpf-next 2/2] selftests/bpf: add byte swapping selftest

On 6/30/20 8:07 AM, Andrii Nakryiko wrote:
> Add simple selftest validating byte swap built-ins and compile-time macros.
> 
> Signed-off-by: Andrii Nakryiko <andriin@...com>
> ---
>   .../testing/selftests/bpf/prog_tests/endian.c | 53 +++++++++++++++++++
>   .../testing/selftests/bpf/progs/test_endian.c | 37 +++++++++++++
>   2 files changed, 90 insertions(+)
>   create mode 100644 tools/testing/selftests/bpf/prog_tests/endian.c
>   create mode 100644 tools/testing/selftests/bpf/progs/test_endian.c

This fails the build for me with:

[...]
   GEN-SKEL [test_progs] tailcall3.skel.h
   GEN-SKEL [test_progs] test_endian.skel.h
libbpf: invalid relo for 'const16' in special section 0xfff2; forgot to initialize global var?..
Error: failed to open BPF object file: 0
Makefile:372: recipe for target '/root/bpf-next/tools/testing/selftests/bpf/test_endian.skel.h' failed
make: *** [/root/bpf-next/tools/testing/selftests/bpf/test_endian.skel.h] Error 255
make: *** Deleting file '/root/bpf-next/tools/testing/selftests/bpf/test_endian.skel.h'