netdev - Re: [PATCH bpf-next v2 0/5] samples: bpf: fix build after move to full libbpf

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Date:   Mon, 14 May 2018 22:57:53 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     daniel@...earbox.net, oss-drivers@...ronome.com,
        netdev@...r.kernel.org,
        Björn Töpel <bjorn.topel@...il.com>,
        Y Song <ys114321@...il.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>
Subject: Re: [PATCH bpf-next v2 0/5] samples: bpf: fix build after move to
 full libbpf

On Mon, May 14, 2018 at 10:35:01PM -0700, Jakub Kicinski wrote:
> Hi!
> 
> Following patches address build issues after recent move to libbpf.
> For out-of-tree builds we would see the following error:
> 
> gcc: error: samples/bpf/../../tools/lib/bpf/libbpf.a: No such file or directory
> 
> libbpf build system is now always invoked explicitly rather than
> relying on building single objects most of the time.  We need to
> resolve the friction between Kbuild and tools/ build system.
> 
> Mini-library called libbpf.h in samples is renamed to bpf_insn.h,
> using linux/filter.h seems not completely trivial since some samples
> get upset when order on include search path in changed.  We do have
> to rename libbpf.h, however, because otherwise it's hard to reliably
> get to libbpf's header in out-of-tree builds.
> 
> v2:
>  - fix the build error harder (patch 3);
>  - add patch 5 (make clang less noisy).

Applied, Thanks