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Date: Wed, 20 Jan 2021 23:35:46 +0100 From: Jiri Olsa <jolsa@...hat.com> To: Sedat Dilek <sedat.dilek@...il.com> Cc: Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>, John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, Mark Rutland <mark.rutland@....com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Namhyung Kim <namhyung@...nel.org>, Shuah Khan <shuah@...nel.org>, Nathan Chancellor <natechancellor@...il.com>, Nick Desaulniers <ndesaulniers@...gle.com>, Quentin Monnet <quentin@...valent.com>, Jean-Philippe Brucker <jean-philippe@...aro.org>, Tobias Klauser <tklauser@...tanz.ch>, Ilya Leoshkevich <iii@...ux.ibm.com>, Toke Høiland-Jørgensen <toke@...hat.com>, Yulia Kartseva <hex@...com>, Andrey Ignatov <rdna@...com>, Thomas Hebb <tommyhebb@...il.com>, Stephane Eranian <eranian@...gle.com>, "Frank Ch. Eigler" <fche@...hat.com>, Masami Hiramatsu <mhiramat@...nel.org>, "David S. Miller" <davem@...emloft.net>, Davide Caratti <dcaratti@...hat.com>, Briana Oursler <briana.oursler@...il.com>, netdev@...r.kernel.org, bpf@...r.kernel.org, linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, clang-built-linux@...glegroups.com Subject: Re: [PATCH RFC] tools: Factor Clang, LLC and LLVM utils definitions On Sat, Jan 16, 2021 at 10:54:04AM +0100, Sedat Dilek wrote: > When dealing with BPF/BTF/pahole and DWARF v5 I wanted to build bpftool. > > While looking into the source code I found duplicate assignments > in misc tools for the LLVM eco system, e.g. clang and llvm-objcopy. > > Move the Clang, LLC and/or LLVM utils definitions to > tools/scripts/Makefile.include file and add missing > includes where needed. > Honestly, I was inspired by commit c8a950d0d3b9 > ("tools: Factor HOSTCC, HOSTLD, HOSTAR definitions"). > > I tested with bpftool and perf on Debian/testing AMD64 and > LLVM/Clang v11.1.0-rc1. > > Build instructions: > > [ make and make-options ] > MAKE="make V=1" > MAKE_OPTS="HOSTCC=clang HOSTCXX=clang++ HOSTLD=ld.lld CC=clang LD=ld.lld LLVM=1 LLVM_IAS=1" > MAKE_OPTS="$MAKE_OPTS PAHOLE=/opt/pahole/bin/pahole" > > [ clean-up ] > $MAKE $MAKE_OPTS -C tools/ clean > > [ bpftool ] > $MAKE $MAKE_OPTS -C tools/bpf/bpftool/ > > [ perf ] > PYTHON=python3 $MAKE $MAKE_OPTS -C tools/perf/ > > I was careful with respecting the user's wish to override custom compiler, > linker, GNU/binutils and/or LLVM utils settings. > > Some personal notes: > 1. I have NOT tested with cross-toolchain for other archs (cross compiler/linker etc.). > 2. This patch is on top of Linux v5.11-rc3. > > I hope to get some feedback from especially Linux-bpf folks. > > Signed-off-by: Sedat Dilek <sedat.dilek@...il.com> > --- > tools/bpf/bpftool/Makefile | 2 -- > tools/bpf/runqslower/Makefile | 3 --- > tools/build/feature/Makefile | 4 ++-- > tools/perf/Makefile.perf | 1 - for tools/build and tools/perf Acked-by: Jiri Olsa <jolsa@...hat.com> jirka > tools/scripts/Makefile.include | 7 +++++++ > tools/testing/selftests/bpf/Makefile | 3 +-- > tools/testing/selftests/tc-testing/Makefile | 3 +-- > 7 files changed, 11 insertions(+), 12 deletions(-) > > diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile > index f897cb5fb12d..71c14efa6e91 100644 > --- a/tools/bpf/bpftool/Makefile > +++ b/tools/bpf/bpftool/Makefile SNIP
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