Re: clang --target=bpf missing on f23 was: Re: [PATCH 1/2] perf test: Add libbpf relocation checker

From	Arnaldo Carvalho de Melo <acme@kernel.org>
Newsgroups	linux.kernel
Subject	Re: clang --target=bpf missing on f23 was: Re: [PATCH 1/2] perf test: Add libbpf relocation checker
Date	2016-01-22 20:10 +0100
Message-ID	<qTPfQ-8lG-9@gated-at.bofh.it> (permalink)
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Em Fri, Jan 22, 2016 at 06:56:02PM +0100, Daniel Borkmann escreveu:
> On 01/22/2016 06:35 PM, Adam Jackson wrote:
> >On Fri, 2016-01-22 at 14:22 -0300, Arnaldo Carvalho de Melo wrote:
> >
> >>	the 'bpf' target for clang is being used together with perf to
> >>build scriptlets into object code that then gets uploaded to the kernel
> >>via sys_bpf(), was the decision not to include 'bpf' just an accident?
> >
> >I wouldn't call it a "decision", that would imply intent. The main
> >reason I explicitly list targets for llvm is to limit the CPU backends
> >to arches Fedora actually runs on (which itself is because I really
> >only care about llvmpipe, and am only touching llvm because it's in my
> >way). Had no idea there was a bpf backend, so never thought to enable
> >it.
> >
> >llvm-3.7.0-4.fc2{3,4} are building now with the bpf backend enabled,
> >I'll create an update for F23 when it's built.
> 
> Awesome, thanks!

Seconded, thanks for the fast response and for adding the bpf target!

Now that is a good, intentional decision 8-)

- Arnaldo

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[PATCH 0/2] perf bpf: Fix relocation error Wang Nan <wangnan0@huawei.com> - 2016-01-22 10:30 +0100
  [PATCH 1/2] perf test: Add libbpf relocation checker Wang Nan <wangnan0@huawei.com> - 2016-01-22 10:30 +0100
    Re: [PATCH 1/2] perf test: Add libbpf relocation checker Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-22 16:50 +0100
      Re: [PATCH 1/2] perf test: Add libbpf relocation checker Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2016-01-22 18:10 +0100
        clang --target=bpf missing on f23 was:  Re: [PATCH 1/2] perf test:  Add libbpf relocation checker Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-22 18:30 +0100
          Re: clang --target=bpf missing on f23 was:  Re: [PATCH 1/2] perf  test: Add libbpf relocation checker Adam Jackson <ajax@redhat.com> - 2016-01-22 18:40 +0100
            Re: clang --target=bpf missing on f23 was:  Re: [PATCH 1/2] perf  test: Add libbpf relocation checker Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2016-01-22 18:50 +0100
              Re: clang --target=bpf missing on f23 was:  Re: [PATCH 1/2] perf  test: Add libbpf relocation checker David Airlie <airlied@redhat.com> - 2016-01-22 22:10 +0100
            Re: clang --target=bpf missing on f23 was:  Re: [PATCH 1/2] perf  test: Add libbpf relocation checker Daniel Borkmann <daniel@iogearbox.net> - 2016-01-22 19:00 +0100
              Re: clang --target=bpf missing on f23 was:  Re: [PATCH 1/2] perf  test: Add libbpf relocation checker Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-22 20:10 +0100

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