netdev - Re: [PATCH v3 bpf-next] libbpf: make libbpf.map source of truth for libbpf version

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Date:   Thu, 15 Aug 2019 17:04:39 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Andrey Ignatov <rdna@...com>
Cc:     Andrii Nakryiko <andriin@...com>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "andrii.nakryiko@...il.com" <andrii.nakryiko@...il.com>,
        Kernel Team <Kernel-team@...com>
Subject: Re: [PATCH v3 bpf-next] libbpf: make libbpf.map source of truth for
 libbpf version

On Wed, Aug 14, 2019 at 3:16 PM Andrey Ignatov <rdna@...com> wrote:
>
> Andrii Nakryiko <andriin@...com> [Wed, 2019-08-14 13:57 -0700]:
> > Currently libbpf version is specified in 2 places: libbpf.map and
> > Makefile. They easily get out of sync and it's very easy to update one,
> > but forget to update another one. In addition, Github projection of
> > libbpf has to maintain its own version which has to be remembered to be
> > kept in sync manually, which is very error-prone approach.
> >
> > This patch makes libbpf.map a source of truth for libbpf version and
> > uses shell invocation to parse out correct full and major libbpf version
> > to use during build. Now we need to make sure that once new release
> > cycle starts, we need to add (initially) empty section to libbpf.map
> > with correct latest version.
> >
> > This also will make it possible to keep Github projection consistent
> > with kernel sources version of libbpf by adopting similar parsing of
> > version from libbpf.map.
> >
> > v2->v3:
> > - grep -o + sort -rV (Andrey);
> >
> > v1->v2:
> > - eager version vars evaluation (Jakub);
> > - simplified version regex (Andrey);
>
> Acked-by: Andrey Ignatov <rdna@...com>

Applied. Thanks