linux-kernel - Re: [PATCH] tools build feature: cleanup feature files on make clean

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Date:   Thu, 3 Sep 2020 16:26:44 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     Jesper Dangaard Brouer <brouer@...hat.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
        bpf@...r.kernel.org
Subject: Re: [PATCH] tools build feature: cleanup feature files on make clean

Em Thu, Sep 03, 2020 at 09:20:35PM +0200, Daniel Borkmann escreveu:
> Hi Arnaldo,
> 
> On 9/3/20 9:03 PM, Arnaldo Carvalho de Melo wrote:
> > Em Thu, Aug 27, 2020 at 10:53:36AM +0200, Jesper Dangaard Brouer escreveu:
> > > The system for "Auto-detecting system features" located under
> > > tools/build/ are (currently) used by perf, libbpf and bpftool. It can
> > > contain stalled feature detection files, which are not cleaned up by
> > > libbpf and bpftool on make clean (side-note: perf tool is correct).
> > > 
> > > Fix this by making the users invoke the make clean target.
> > > 
> > > Some details about the changes. The libbpf Makefile already had a
> > > clean-config target (which seems to be copy-pasted from perf), but this
> > > target was not "connected" (a make dependency) to clean target. Choose
> > > not to rename target as someone might be using it. Did change the output
> > > from "CLEAN config" to "CLEAN feature-detect", to make it more clear
> > > what happens.
> > 
> > Since this mostly touches BPF, should it go via the BPF tree?
> 
> Already applied roughly a week ago:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=661b37cd437ef49cd28444f79b9b0c71ea76e8c8

Thanks!

- Arnaldo