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Date: Tue, 5 Apr 2022 18:44:46 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc: Sedat Dilek <sedat.dilek@...il.com>,
Nathan Chancellor <nathan@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Fangrui Song <maskray@...gle.com>,
Florian Fainelli <f.fainelli@...il.com>,
Ian Rogers <irogers@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
John Keeping <john@...anate.com>, Leo Yan <leo.yan@...aro.org>,
Michael Petlan <mpetlan@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Build perf with clang, failure with libperf
Em Tue, Apr 05, 2022 at 05:00:14PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Apr 05, 2022 at 05:46:00PM +0200, Sedat Dilek escreveu:
> > So, we should include scripts/Makefile.clang or enhance
> > tools/scripts/Makefile.include where LLVM/Clang stuff is defined (and
> > can be overridden).
>
> > Jiri pointed out he needed two options (when I recall correctly):
> >
> > [1] -Wno-unused-command-line-argument
I didn't see this one so far, but this one, and for the python case,
appears on clang 13 on:
22 45.02 archlinux:base : FAIL clang version 13.0.1
CC /tmp/build/perf/arch/x86/util/pmu.o
clang-13: error: optimization flag '-ffat-lto-objects' is not supported [-Werror,-Wignored-optimization-argument]
error: command '/usr/sbin/clang' failed with exit code 1
MKDIR /tmp/build/perf/ui/stdio/
cp: cannot stat '/tmp/build/perf/python_ext_build/lib/perf*.so': No such file or directory
CC /tmp/build/perf/arch/x86/util/kvm-stat.o
make[2]: *** [Makefile.perf:639: /tmp/build/perf/python/perf.so] Error 1
make[2]: *** Waiting for unfinished jobs....
> > Example:
> > tools/testing/selftests/bpf/Makefile-# Silence some warnings when
> > compiled with clang
> > tools/testing/selftests/bpf/Makefile-ifneq ($(LLVM),)
> > tools/testing/selftests/bpf/Makefile:CFLAGS += -Wno-unused-command-line-argument
> > tools/testing/selftests/bpf/Makefile-endif
> >
> > ^^ Here you see it is checked for LLVM.
> > Again, put that stuff in one single place - tools/scripts/Makefile.include
> >
> > [2] -Wno-ignored-optimization-argument
> >
> > Both [1] and [2] were not needed in my case.
> >
> > [1] is always good to have - not only for perf.
> >
> > AFAICS, you wanted to consolidate PERL_EMBED_XXX and FLAGS_PERL_EMBED
> > at a single place.
> > 1. tools/build/feature/Makefile
> > 2. tools/perf/Makefile.config
>
> Yeah, at some point I'll do it, probably in the 5.19 window.
>
> > Can not say where we all need perl check/requirement - maybe put that
> > stuff to the place where we define/check for toolchain/compiler (see
> > above)?
> >
> > Again, all these issues happen because of -Werror is strictly set.
> >
> > I put my patches around that area (see 2nd patch) - without checking
> > if the LLVM/Clang toolchain is used or not.
> > Both patches are attached.
>
> I saw those patches, even added a:
>
> Based-on-a-patch-by: Sedat Dilek <sedat.dilek@...il.com>
>
> > $ git show -1 for-5.17/tools-feature_detect_libperl-clang-dileks-v3
> > commit 72ba634c9b39547197900d8b64ff36134af3ed08
> > (for-5.17/tools-feature_detect_libperl-clang-dileks-v3)
> > Author: Sedat Dilek <sedat.dilek@...il.com>
> > Date: Sun Mar 13 12:37:06 2022 +0100
> >
> > tools: feature-detect: libperl: Sync PERL_EMBED_CCOPTS with perf
> >
> > diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
> > index 1480910c792e..fa6be127f483 100644
> > --- a/tools/build/feature/Makefile
> > +++ b/tools/build/feature/Makefile
> > @@ -217,7 +217,8 @@ strip-libs = $(filter-out -l%,$(1))
> > PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
> > PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
> > PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
> > -PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
> > +PERL_EMBED_CCOPTS = $(perl -MExtUtils::Embed -e ccopts 2>/dev/null)
> > +PERL_EMBED_CCOPTS := $(filter-out -ffat-lto-objects, $(PERL_EMBED_CCOPTS))
> > FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
> >
> > $(OUTPUT)test-libperl.bin:
> >
> > $ git show -1 for-5.17/perf-libperl_support-clang-dileks
> > commit 316a1917ec05772ab0f99dad534fabdd74547865
> > (for-5.17/perf-libperl_support-clang-dileks)
> > Author: Sedat Dilek <sedat.dilek@...il.com>
> > Date: Sun Mar 6 11:29:50 2022 +0100
> >
> > perf: Fix libperl support with clang and perl v5.34
> >
> > diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
> > index 1480910c792e..ef9b37c5c652 100644
> > --- a/tools/build/feature/Makefile
> > +++ b/tools/build/feature/Makefile
> > @@ -81,7 +81,7 @@ PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config
> >
> > all: $(FILES)
> >
> > -__BUILD = $(CC) $(CFLAGS) -MD -Wall -Werror -o $@ $(patsubst
> > %.bin,%.c,$(@F)) $(LDFLAGS)
> > +__BUILD = $(CC) $(CFLAGS) -MD -Wall -Werror
> > -Wno-compound-token-split-by-macro -o $@ $(patsubst %.bin,%.c,$(@F))
> > $(LDFLAGS)
> > BUILD = $(__BUILD) > $(@:.bin=.make.output) 2>&1
> >
> > __BUILDXX = $(CXX) $(CXXFLAGS) -MD -Wall -Werror -o $@ $(patsubst
> > %.bin,%.cpp,$(@F)) $(LDFLAGS)
> > diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> > index 96ad944ca6a8..acc987daf56e 100644
> > --- a/tools/perf/Makefile.config
> > +++ b/tools/perf/Makefile.config
> > @@ -213,7 +213,7 @@ endif
> >
> > # Treat warnings as errors unless directed not to
> > ifneq ($(WERROR),0)
> > - CORE_CFLAGS += -Werror
> > + CORE_CFLAGS += -Werror -Wno-compound-token-split-by-macro
>
> Ok, you added it right after -Werror, which is equivalent, in the
> feature test case, to what I did.
>
> I'll take that into account when working on having all this in a single
> place, next merge window.
>
> > CXXFLAGS += -Werror
> > HOSTCFLAGS += -Werror
> > endif
> >
> > With both patches I am able to build perf-5.17 with LLVM/Clang v14 and
> > -std=gnu11 and perl v5.34.
> >
> > It's good when Jiri tests on his system.
>
> Right, I'll test on these containers, with many gcc and clang versions:
>
> 1 almalinux:8 : Ok gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-4) , clang version 12.0.1 (Red Hat 12.0.1-4.module_el8.5.0+1025+93159d6c)
> 2 alpine:3.4 : Ok gcc (Alpine 5.3.0) 5.3.0 , clang version 3.8.0 (tags/RELEASE_380/final)
> 3 alpine:3.5 : Ok gcc (Alpine 6.2.1) 6.2.1 20160822 , clang version 3.8.1 (tags/RELEASE_381/final)
> 4 alpine:3.6 : Ok gcc (Alpine 6.3.0) 6.3.0 , clang version 4.0.0 (tags/RELEASE_400/final)
> 5 alpine:3.7 : Ok gcc (Alpine 6.4.0) 6.4.0 , Alpine clang version 5.0.0 (tags/RELEASE_500/final) (based on LLVM 5.0.0)
> 6 alpine:3.8 : Ok gcc (Alpine 6.4.0) 6.4.0 , Alpine clang version 5.0.1 (tags/RELEASE_501/final) (based on LLVM 5.0.1)
> 7 alpine:3.9 : Ok gcc (Alpine 8.3.0) 8.3.0 , Alpine clang version 5.0.1 (tags/RELEASE_502/final) (based on LLVM 5.0.1)
> 8 alpine:3.10 : Ok gcc (Alpine 8.3.0) 8.3.0 , Alpine clang version 8.0.0 (tags/RELEASE_800/final) (based on LLVM 8.0.0)
> 9 alpine:3.11 : Ok gcc (Alpine 9.3.0) 9.3.0 , Alpine clang version 9.0.0 (https://git.alpinelinux.org/aports f7f0d2c2b8bcd6a5843401a9a702029556492689) (based on LLVM 9.0.0)
> 10 alpine:3.12 : Ok gcc (Alpine 9.3.0) 9.3.0 , Alpine clang version 10.0.0 (https://gitlab.alpinelinux.org/alpine/aports.git 7445adce501f8473efdb93b17b5eaf2f1445ed4c)
> 11 alpine:3.13 : Ok gcc (Alpine 10.2.1_pre1) 10.2.1 20201203 , Alpine clang version 10.0.1
> 12 alpine:3.14 : Ok gcc (Alpine 10.3.1_git20210424) 10.3.1 20210424 , Alpine clang version 11.1.0
> 13 alpine:3.15 : Ok gcc (Alpine 10.3.1_git20211027) 10.3.1 20211027 , Alpine clang version 12.0.1
> 14 alpine:edge : Ok gcc (Alpine 11.2.1_git20220219) 11.2.1 20220219 , Alpine clang version 13.0.1
> 15 alt:p8 : Ok x86_64-alt-linux-gcc (GCC) 5.3.1 20151207 (ALT p8 5.3.1-alt3.M80P.1) , clang version 3.8.0 (tags/RELEASE_380/final)
> 16 alt:p9 : Ok x86_64-alt-linux-gcc (GCC) 8.4.1 20200305 (ALT p9 8.4.1-alt0.p9.1) , clang version 10.0.0
> 17 alt:p10 : Ok x86_64-alt-linux-gcc (GCC) 10.3.1 20210703 (ALT Sisyphus 10.3.1-alt2) , clang version 11.0.1
> 18 alt:sisyphus : Ok x86_64-alt-linux-gcc (GCC) 11.2.1 20211202 (ALT Sisyphus 11.2.1-alt2) , ALT Linux Team clang version 12.0.1
> 19 amazonlinux:1 : Ok gcc (GCC) 7.2.1 20170915 (Red Hat 7.2.1-2) , clang version 3.6.2 (tags/RELEASE_362/final)
> 20 amazonlinux:2 : Ok gcc (GCC) 7.3.1 20180712 (Red Hat 7.3.1-13) , clang version 11.1.0 (Amazon Linux 2 11.1.0-1.amzn2.0.2)
> 21 amazonlinux:devel : Ok gcc (GCC) 11.2.1 20210728 (Red Hat 11.2.1-2) , clang version 12.0.1 (Fedora 12.0.1-1.amzn2022)
> 22 archlinux:base : FAIL clang version 13.0.1
> 23 centos:8 : Ok gcc (GCC) 8.4.1 20200928 (Red Hat 8.4.1-1) , clang version 11.0.1 (Red Hat 11.0.1-1.module_el8.4.0+966+2995ef20)
> 24 centos:stream : Ok gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-10) , clang version 13.0.0 (Red Hat 13.0.0-3.module_el8.6.0+1074+380cef3f)
> 25 clearlinux:latest : Ok gcc (Clear Linux OS for Intel Architecture) 11.2.1 20220322 releases/gcc-11.2.0-884-gf45603f39b , clang version 13.0.0
> 26 debian:9 : Ok gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516 , clang version 3.8.1-24 (tags/RELEASE_381/final)
> 27 debian:10 : Ok gcc (Debian 8.3.0-6) 8.3.0 , Debian clang version 11.0.1-2~deb10u1
> 28 debian:11 : Ok gcc (Debian 10.2.1-6) 10.2.1 20210110 , Debian clang version 11.0.1-2
> 29 debian:experimental : Ok gcc (Debian 11.2.0-19) 11.2.0 , Debian clang version 13.0.1-3+b2
> 30 debian:experimental-x-arm64 : Ok aarch64-linux-gnu-gcc (Debian 11.2.0-18) 11.2.0
> 31 debian:experimental-x-mips : Ok mips-linux-gnu-gcc (Debian 11.2.0-18) 11.2.0
> 32 debian:experimental-x-mips64 : Ok mips64-linux-gnuabi64-gcc (Debian 10.2.1-6) 10.2.1 20210110
> 33 debian:experimental-x-mipsel : Ok mipsel-linux-gnu-gcc (Debian 11.2.0-18) 11.2.0
> 34 fedora:22 : Ok gcc (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6) , clang version 3.5.0 (tags/RELEASE_350/final)
> 35 fedora:23 : Ok gcc (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6) , clang version 3.7.0 (tags/RELEASE_370/final)
> 36 fedora:24 : Ok gcc (GCC) 6.3.1 20161221 (Red Hat 6.3.1-1) , clang version 3.8.1 (tags/RELEASE_381/final)
> 37 fedora:24-x-ARC-uClibc : Ok arc-linux-gcc (ARCompact ISA Linux uClibc toolchain 2017.09-rc2) 7.1.1 20170710
> 38 fedora:25 : Ok gcc (GCC) 6.4.1 20170727 (Red Hat 6.4.1-1) , clang version 3.9.1 (tags/RELEASE_391/final)
> 39 fedora:26 : Ok gcc (GCC) 7.3.1 20180130 (Red Hat 7.3.1-2) , clang version 4.0.1 (tags/RELEASE_401/final)
> 40 fedora:27 : Ok gcc (GCC) 7.3.1 20180712 (Red Hat 7.3.1-6) , clang version 5.0.2 (tags/RELEASE_502/final)
> 41 fedora:28 : Ok gcc (GCC) 8.3.1 20190223 (Red Hat 8.3.1-2) , clang version 6.0.1 (tags/RELEASE_601/final)
> 42 fedora:29 : Ok gcc (GCC) 8.3.1 20190223 (Red Hat 8.3.1-2) , clang version 7.0.1 (Fedora 7.0.1-6.fc29)
> 43 fedora:30 : Ok gcc (GCC) 9.3.1 20200408 (Red Hat 9.3.1-2) , clang version 8.0.0 (Fedora 8.0.0-3.fc30)
> 44 fedora:31 : Ok gcc (GCC) 9.3.1 20200408 (Red Hat 9.3.1-2) , clang version 9.0.1 (Fedora 9.0.1-4.fc31)
> 45 fedora:32 : Ok gcc (GCC) 10.3.1 20210422 (Red Hat 10.3.1-1) , clang version 10.0.1 (Fedora 10.0.1-3.fc32)
> 46 fedora:33 : Ok gcc (GCC) 10.3.1 20210422 (Red Hat 10.3.1-1) , clang version 11.0.0 (Fedora 11.0.0-3.fc33)
> 47 fedora:34 : Ok gcc (GCC) 11.2.1 20220127 (Red Hat 11.2.1-9) , clang version 12.0.1 (Fedora 12.0.1-1.fc34)
> 48 fedora:34-x-ARC-glibc : Ok arc-linux-gcc (ARC HS GNU/Linux glibc toolchain 2019.03-rc1) 8.3.1 20190225
> 49 fedora:34-x-ARC-uClibc : Ok arc-linux-gcc (ARCv2 ISA Linux uClibc toolchain 2019.03-rc1) 8.3.1 20190225
> 50 fedora:35 : Ok gcc (GCC) 11.2.1 20220127 (Red Hat 11.2.1-9) , clang version 13.0.0 (Fedora 13.0.0-3.fc35)
> 51 fedora:36 : FAIL gcc version 12.0.1 20220308 (Red Hat 12.0.1-0) (GCC)
> 52 fedora:rawhide : Ok gcc (GCC) 12.0.1 20220308 (Red Hat 12.0.1-0) , clang version 13.0.1 (Fedora 13.0.1-1.fc37)
> 53 gentoo-stage3:latest : Ok gcc (Gentoo 11.2.0 p1) 11.2.0 , clang version 13.0.0
> 54 mageia:6 : Ok gcc (Mageia 5.5.0-1.mga6) 5.5.0 , clang version 3.9.1 (tags/RELEASE_391/final)
> 55 mageia:7 : FAIL clang version 8.0.0 (Mageia 8.0.0-1.mga7)
> 56 manjaro:base : Ok gcc (GCC) 11.1.0 , clang version 13.0.0
> 57 openmandriva:4.2 : FAIL gcc version 11.2.0 20210728 (OpenMandriva) (GCC)
> 58 openmandriva:cooker : FAIL gcc version 11.2.0 20210728 (OpenMandriva) (GCC)
> 59 opensuse:15.0 : Ok gcc (SUSE Linux) 7.4.1 20190905 [gcc-7-branch revision 275407] , clang version 5.0.1 (tags/RELEASE_501/final 312548)
> 60 opensuse:15.1 : Ok gcc (SUSE Linux) 7.5.0 , clang version 7.0.1 (tags/RELEASE_701/final 349238)
> 61 opensuse:15.2 : Ok gcc (SUSE Linux) 7.5.0 , clang version 9.0.1
> 62 opensuse:15.3 : Ok gcc (SUSE Linux) 7.5.0 , clang version 11.0.1
> 63 opensuse:15.4 : Ok gcc (SUSE Linux) 7.5.0 , clang version 11.0.1
> 64 opensuse:tumbleweed : Ok gcc (SUSE Linux) 11.2.1 20211124 [revision 7510c23c1ec53aa4a62705f0384079661342ff7b] , clang version 13.0.0
> 65 oraclelinux:8 : Ok gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-4.0.1) , clang version 12.0.1 (Red Hat 12.0.1-4.0.1.module+el8.5.0+20428+2b4ecd47)
> 66 rockylinux:8 : Ok gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-4) , clang version 12.0.1 (Red Hat 12.0.1-4.module+el8.5.0+715+58f51d49)
> 67 ubuntu:16.04 : Ok gcc (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609 , clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final)
> 68 ubuntu:16.04-x-arm : Ok arm-linux-gnueabihf-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 69 ubuntu:16.04-x-arm64 : Ok aarch64-linux-gnu-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 70 ubuntu:16.04-x-powerpc : Ok powerpc-linux-gnu-gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 71 ubuntu:16.04-x-powerpc64 : Ok powerpc64-linux-gnu-gcc (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 72 ubuntu:16.04-x-powerpc64el : Ok powerpc64le-linux-gnu-gcc (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 73 ubuntu:16.04-x-s390 : Ok s390x-linux-gnu-gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
> 74 ubuntu:18.04 : Ok gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0 , clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
> 75 ubuntu:18.04-x-arm : Ok arm-linux-gnueabihf-gcc (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04) 7.5.0
> 76 ubuntu:18.04-x-arm64 : Ok aarch64-linux-gnu-gcc (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04) 7.5.0
> 77 ubuntu:18.04-x-m68k : Ok m68k-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
> 78 ubuntu:18.04-x-powerpc : Ok powerpc-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
> 79 ubuntu:18.04-x-powerpc64 : Ok powerpc64-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
> 80 ubuntu:18.04-x-powerpc64el : Ok powerpc64le-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
> 81 ubuntu:18.04-x-riscv64 : Ok riscv64-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
> 82 ubuntu:18.04-x-s390 : Ok s390x-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
> 83 ubuntu:18.04-x-sh4 : Ok sh4-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
> 84 ubuntu:18.04-x-sparc64 : Ok sparc64-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
> 85 ubuntu:20.04 : FAIL clang version 10.0.0-4ubuntu1
> 86 ubuntu:20.04-x-powerpc64el : Ok powerpc64le-linux-gnu-gcc (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0
> 87 ubuntu:20.10 : Ok gcc (Ubuntu 10.3.0-1ubuntu1~20.10) 10.3.0 , Ubuntu clang version 11.0.0-2
> 88 ubuntu:21.04 : Ok gcc (Ubuntu 10.3.0-1ubuntu1) 10.3.0 , Ubuntu clang version 12.0.0-3ubuntu1~21.04.2
> 89 ubuntu:21.10 : Ok gcc (Ubuntu 11.2.0-7ubuntu2) 11.2.0 , Ubuntu clang version 13.0.0-2
> 90 ubuntu:22.04 : FAIL gcc version 11.2.0 (Ubuntu 11.2.0-18ubuntu1)
>
> > I can test your patch with my next kernel-build, but can not promise.
> > Do you have it somewhere in a Git repo/branch or a (LORE) link for
> > easy application?
>
> git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tmp.perf/urgent
>
> > Did not check if b4 tool is able to extract it as patch out of your
> > original email.
> >
> > - Sedat -
>
> > From 72ba634c9b39547197900d8b64ff36134af3ed08 Mon Sep 17 00:00:00 2001
> > From: Sedat Dilek <sedat.dilek@...il.com>
> > Date: Sun, 13 Mar 2022 12:37:06 +0100
> > Subject: [PATCH] tools: feature-detect: libperl: Sync PERL_EMBED_CCOPTS with
> > perf
> >
> > ---
> > tools/build/feature/Makefile | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
> > index 1480910c792e..fa6be127f483 100644
> > --- a/tools/build/feature/Makefile
> > +++ b/tools/build/feature/Makefile
> > @@ -217,7 +217,8 @@ strip-libs = $(filter-out -l%,$(1))
> > PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
> > PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
> > PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
> > -PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
> > +PERL_EMBED_CCOPTS = $(perl -MExtUtils::Embed -e ccopts 2>/dev/null)
> > +PERL_EMBED_CCOPTS := $(filter-out -ffat-lto-objects, $(PERL_EMBED_CCOPTS))
> > FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
> >
> > $(OUTPUT)test-libperl.bin:
> > --
> > 2.35.1
> >
>
> > From 316a1917ec05772ab0f99dad534fabdd74547865 Mon Sep 17 00:00:00 2001
> > From: Sedat Dilek <sedat.dilek@...il.com>
> > Date: Sun, 6 Mar 2022 11:29:50 +0100
> > Subject: [PATCH] perf: Fix libperl support with clang and perl v5.34
> >
> > ---
> > tools/build/feature/Makefile | 2 +-
> > tools/perf/Makefile.config | 2 +-
> > 2 files changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
> > index 1480910c792e..ef9b37c5c652 100644
> > --- a/tools/build/feature/Makefile
> > +++ b/tools/build/feature/Makefile
> > @@ -81,7 +81,7 @@ PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config
> >
> > all: $(FILES)
> >
> > -__BUILD = $(CC) $(CFLAGS) -MD -Wall -Werror -o $@ $(patsubst %.bin,%.c,$(@F)) $(LDFLAGS)
> > +__BUILD = $(CC) $(CFLAGS) -MD -Wall -Werror -Wno-compound-token-split-by-macro -o $@ $(patsubst %.bin,%.c,$(@F)) $(LDFLAGS)
> > BUILD = $(__BUILD) > $(@:.bin=.make.output) 2>&1
> >
> > __BUILDXX = $(CXX) $(CXXFLAGS) -MD -Wall -Werror -o $@ $(patsubst %.bin,%.cpp,$(@F)) $(LDFLAGS)
> > diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> > index 96ad944ca6a8..acc987daf56e 100644
> > --- a/tools/perf/Makefile.config
> > +++ b/tools/perf/Makefile.config
> > @@ -213,7 +213,7 @@ endif
> >
> > # Treat warnings as errors unless directed not to
> > ifneq ($(WERROR),0)
> > - CORE_CFLAGS += -Werror
> > + CORE_CFLAGS += -Werror -Wno-compound-token-split-by-macro
> > CXXFLAGS += -Werror
> > HOSTCFLAGS += -Werror
> > endif
> > --
> > 2.35.1
> >
>
>
> - Arnaldo
--
- Arnaldo
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