netdev - Re: [PATCH bpf-next 1/2] tools/bpftool: allow substituting custom vmlinux.h for the build

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Message-ID: <9a407c84-bd5d-7eba-6c23-0642a8d4b2f4@fb.com>
Date:   Mon, 29 Jun 2020 20:12:30 -0700
From:   Yonghong Song <yhs@...com>
To:     Andrii Nakryiko <andriin@...com>, <bpf@...r.kernel.org>,
        <netdev@...r.kernel.org>, <ast@...com>, <daniel@...earbox.net>
CC:     <andrii.nakryiko@...il.com>, <kernel-team@...com>
Subject: Re: [PATCH bpf-next 1/2] tools/bpftool: allow substituting custom
 vmlinux.h for the build



On 6/29/20 5:47 PM, 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 In some build contexts (e.g., Travis CI build for outdated kernel), vmlinux.h,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 <andriin@...com>

Acked-by: Yonghong Song <yhs@...com>