Subject: Re: [PATCH bpf] libbpf: define BTF_KIND_* constants in btf.h to avoid compilation errors

From: [email-masked]
Date: Wed, 19 Jan 2022 04:00:10 +0000

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <[email-masked]>:

On Tue, 18 Jan 2022 15:13:27 +0100 you wrote:
> The btf.h header included with libbpf contains inline helper functions to
> check for various BTF kinds. These helpers directly reference the
> BTF_KIND_* constants defined in the kernel header, and because the header
> file is included in user applications, this happens in the user application
> compile units.
> 
> This presents a problem if a user application is compiled on a system with
> older kernel headers because the constants are not available. To avoid
> this, add #defines of the constants directly in btf.h before using them.
> 
> [...]

Here is the summary with links:
  - [bpf] libbpf: define BTF_KIND_* constants in btf.h to avoid compilation errors
    https://git.kernel.org/bpf/bpf-next/c/eaa266d83a37

You are awesome, thank you!
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