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Date:   Tue, 18 Aug 2020 18:08:35 -0700
From:   Alexei Starovoitov <>
To:     Andrii Nakryiko <>
Subject: Re: [PATCH bpf-next 4/4] tools: remove feature-libelf-mmap feature

On Tue, Aug 18, 2020 at 02:59:08PM -0700, Andrii Nakryiko wrote:
> It's trivial to handle missing ELF_C_MMAP_READ support in libelf the way that
> objtool has solved it in
> ("774bec3fddcc objtool: Add fallback from ELF_C_READ_MMAP to ELF_C_READ").
> So instead of having an entire feature detector for that, just do what objtool
> does for perf and libbpf. And keep their Makefiles a bit simpler.
> Signed-off-by: Andrii Nakryiko <>

overall looks good, but this patch doesn't apply to bpf-next.

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