netdev - Re: [PATCHv5 iproute2-next 0/5] iproute2: add libbpf support

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Message-ID: <9a781009-e7e5-4f8c-0e49-bd7386ca5818@solarflare.com>
Date:   Tue, 17 Nov 2020 11:56:48 +0000
From:   Edward Cree <ecree@...arflare.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>
CC:     Hangbin Liu <haliu@...hat.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        David Ahern <dsahern@...il.com>,
        "Daniel Borkmann" <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        David Miller <davem@...emloft.net>,
        Network Development <netdev@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, Jiri Benc <jbenc@...hat.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>
Subject: Re: [PATCHv5 iproute2-next 0/5] iproute2: add libbpf support

On 17/11/2020 02:37, Alexei Starovoitov wrote:
> If a company built a bpf-based product and wants to distibute such
> product as a package it needs a way to specify this dependency in pkg config.
> 'tc -V' is not something that can be put in a spec.
> The main iproute2 version can be used as a dependency, but it's meaningless
> when presence of libbpf and its version is not strictly derived from
> iproute2 spec.

But if libbpf is dynamically linked, they can put
Requires: libbpf >= 0.3.0
Requires: iproute-tc >= 5.10
and get the dependency behaviour they need.  No?

-ed