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Date: Mon, 9 Mar 2015 19:38:36 +0800
From: He Kuang <hekuang@huawei.com>
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To: Tom Zanussi <tom.zanussi@linux.intel.com>,
        Alexei Starovoitov <ast@plumgrid.com>
CC: Steven Rostedt <rostedt@goodmis.org>,
        Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
        Namhyung Kim <namhyung@kernel.org>, "Andi Kleen" <andi@firstfloor.org>,
        LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Arnaldo Carvalho de Melo <acme@infradead.org>
Subject: Re: [PATCH v2 00/15] tracing: 'hist' triggers
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hi, Tom

On 2015/3/3 3:55, Tom Zanussi wrote:
> BTW, I've actually tried to play around with the BPF samples/, but it 
> seems they're not actually hooked into the system i.e. the samples 
> Makefile doesn't build them, and it even looks for tools/llvm that's 
> not there. I got as far as getting the latest llvm from the location 
> mentioened in one of the bpf commit messages, but gave up after it 
> told me 'invalid target bpf'. And I couldn't find any documentation on 
> how to set it all up - did I just miss that? Tom 

I'd also encountered the same problem:

--enable-experimental-targets=BPF, 'BPF' letters must be uppercase. Have 
a try.
>> Thanks
>
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