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Date: Thu, 3 Oct 2019 02:14:50 +0300
From: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Subject: Re: [PATCH bpf] samples/bpf: kbuild: add CONFIG_SAMPLE_BPF Kconfig
Message-ID: <20191002231448.GA10649@khorivan>
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To: =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= <bjorn.topel@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>, Networking <netdev@vger.kernel.org>, Alexei Starovoitov <ast@kernel.org>, Daniel Borkmann <daniel@iogearbox.net>, =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= <bjorn.topel@intel.com>, Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>, bpf <bpf@vger.kernel.org>

On Wed, Oct 02, 2019 at 09:41:15AM +0200, Björn Töpel wrote:
>On Wed, 2 Oct 2019 at 03:49, Masahiro Yamada
><yamada.masahiro@socionext.com> wrote:
>>
>[...]
>> > Yes, the BPF samples require clang/LLVM with BPF support to build. Any
>> > suggestion on a good way to address this (missing tools), better than
>> > the warning above? After the commit 394053f4a4b3 ("kbuild: make single
>> > targets work more correctly"), it's no longer possible to build
>> > samples/bpf without support in the samples/Makefile.
>>
>>
>> You can with
>>
>> "make M=samples/bpf"
>>
>
>Oh, I didn't know that. Does M= support "output" builds (O=)?
>
>I usually just build samples/bpf/ with:
>
>  $ make V=1 O=/home/foo/build/bleh samples/bpf/
>
>
>Björn

Shouldn't README be updated?

-- 
Regards,
Ivan Khoronzhuk