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Date:   Tue, 30 Jun 2020 16:12:00 +0200
From:   Daniel Borkmann <>
To:     Andrii Nakryiko <>,,,
Subject: Re: [PATCH bpf-next 1/2] tools/bpftool: allow substituting custom
 vmlinux.h for the build

On 6/30/20 2:47 AM, Andrii Nakryiko wrote:
> In some build contexts (e.g., Travis CI build for outdated kernel), vmlinux.h,
> generated from available kernel, doesn't contain all the types necessary for
> BPF program compilation. For such set up, the most maintainable way to deal
> with this problem is to keep pre-generated (almost up-to-date) vmlinux.h
> checked in and use it for compilation purposes. bpftool after that can deal
> with kernel missing some of the features in runtime with no problems.
> To that effect, allow to specify path to custom vmlinux.h to bpftool's
> Makefile with VMLINUX_H variable.
> Signed-off-by: Andrii Nakryiko <>

Both applied, thanks!

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