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From: Alexei Starovoitov <ast@fb.com>
To: Yonghong Song <yhs@fb.com>, <bpf@vger.kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>,
	Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>,
	<kernel-team@fb.com>, Nick Desaulniers <ndesaulniers@google.com>,
	Sedat Dilek <sedat.dilek@gmail.com>
Subject: Re: [PATCH bpf-next 0/5] support build selftests/bpf with clang
Date: Sat, 10 Apr 2021 10:23:18 -0700	[thread overview]
Message-ID: <1ec2643d-0ac9-1dcd-8bbd-12cbc5884e7f@fb.com> (raw)
In-Reply-To: <20210410164925.768741-1-yhs@fb.com>

On 4/10/21 9:49 AM, Yonghong Song wrote:
> To build kernel with clang, people typically use
>    make -j60 LLVM=1 LLVM_IAS=1
> LLVM_IAS=1 is not required for non-LTO build but
> is required for LTO build. In my environment,
> I am always having LLVM_IAS=1 regardless of
> whether LTO is enabled or not.
> 
> After kernel is build with clang, the following command
> can be used to build selftests with clang:
>    make -j60 -C tools/testing/selftests/bpf LLVM=1 LLVM_IAS=1

Will it use clang to compile libbpf and bpftool as well?

  parent reply	other threads:[~2021-04-10 17:23 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-10 16:49 [PATCH bpf-next 0/5] support build selftests/bpf with clang Yonghong Song
2021-04-10 16:49 ` [PATCH bpf-next 1/5] selftests: set CC to clang in lib.mk if LLVM is set Yonghong Song
2021-04-11 10:22   ` Sedat Dilek
2021-04-11 16:51     ` Yonghong Song
2021-04-11 17:10       ` Sedat Dilek
2021-04-10 16:49 ` [PATCH bpf-next 2/5] tools: allow proper CC/CXX/... override with LLVM=1 in Makefile.include Yonghong Song
2021-04-11 10:24   ` Sedat Dilek
2021-04-11 16:52     ` Yonghong Song
2021-04-10 16:49 ` [PATCH bpf-next 3/5] selftests/bpf: fix test_cpp compilation failure with clang Yonghong Song
2021-04-11 10:47   ` Sedat Dilek
2021-04-11 17:20     ` Yonghong Song
2021-04-11 17:31       ` Sedat Dilek
2021-04-11 19:08         ` Yonghong Song
2021-04-12  4:47           ` Sedat Dilek
2021-04-12  5:42             ` Yonghong Song
2021-04-12  6:06               ` Sedat Dilek
2021-04-12 14:15                 ` Yonghong Song
2021-04-13  4:32   ` Andrii Nakryiko
2021-04-13  6:12     ` Yonghong Song
2021-04-13 17:50       ` Andrii Nakryiko
2021-04-10 16:49 ` [PATCH bpf-next 4/5] selftests/bpf: silence clang compilation warnings Yonghong Song
2021-04-11 11:12   ` Sedat Dilek
2021-04-11 17:40     ` Yonghong Song
2021-04-10 16:49 ` [PATCH bpf-next 5/5] bpftool: fix a clang compilation warning Yonghong Song
2021-04-11 11:05   ` Sedat Dilek
2021-04-11 17:24     ` Yonghong Song
2021-04-10 17:23 ` Alexei Starovoitov [this message]
2021-04-10 17:38   ` [PATCH bpf-next 0/5] support build selftests/bpf with clang Yonghong Song
2021-04-10 19:19 ` Sedat Dilek
2021-04-11 16:46   ` Yonghong Song

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