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Date: Sun, 6 Mar 2022 17:00:22 +0100
From: Sedat Dilek <sedat.dilek@...il.com>
To: Jiri Olsa <olsajiri@...il.com>
Cc: 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>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [Linux-v5.17-rc6] Building tools/perf with perl v5.34
On Sun, Mar 6, 2022 at 4:42 PM Jiri Olsa <olsajiri@...il.com> wrote:
>
> On Sun, Mar 06, 2022 at 03:28:09AM +0100, Sedat Dilek wrote:
> > On Sat, Mar 5, 2022 at 9:09 PM Jiri Olsa <olsajiri@...il.com> wrote:
> > >
> > > On Sat, Mar 05, 2022 at 08:52:18AM +0100, Sedat Dilek wrote:
> > > > Hi,
> > > >
> > > > I am here on Debian/unstable AMD64 which switched over to perl v5.34
> > > > in February 2022.
> > > >
> > > > Unfortunately, my perf does not build with this (lib)perl version:
> > > >
> > > > $ ~/bin/perf -vv
> > > > perf version 5.17-rc6
> > > > dwarf: [ on ] # HAVE_DWARF_SUPPORT
> > > > dwarf_getlocations: [ on ] # HAVE_DWARF_GETLOCATIONS_SUPPORT
> > > > glibc: [ on ] # HAVE_GLIBC_SUPPORT
> > > > syscall_table: [ on ] # HAVE_SYSCALL_TABLE_SUPPORT
> > > > libbfd: [ on ] # HAVE_LIBBFD_SUPPORT
> > > > libelf: [ on ] # HAVE_LIBELF_SUPPORT
> > > > libnuma: [ on ] # HAVE_LIBNUMA_SUPPORT
> > > > numa_num_possible_cpus: [ on ] # HAVE_LIBNUMA_SUPPORT
> > > > libperl: [ OFF ] # HAVE_LIBPERL_SUPPORT
> > > > libpython: [ on ] # HAVE_LIBPYTHON_SUPPORT
> > > > libslang: [ on ] # HAVE_SLANG_SUPPORT
> > > > libcrypto: [ on ] # HAVE_LIBCRYPTO_SUPPORT
> > > > libunwind: [ on ] # HAVE_LIBUNWIND_SUPPORT
> > > > libdw-dwarf-unwind: [ on ] # HAVE_DWARF_SUPPORT
> > > > zlib: [ on ] # HAVE_ZLIB_SUPPORT
> > > > lzma: [ on ] # HAVE_LZMA_SUPPORT
> > > > get_cpuid: [ on ] # HAVE_AUXTRACE_SUPPORT
> > > > bpf: [ on ] # HAVE_LIBBPF_SUPPORT
> > > > aio: [ on ] # HAVE_AIO_SUPPORT
> > > > zstd: [ on ] # HAVE_ZSTD_SUPPORT
> > > > libpfm4: [ OFF ] # HAVE_LIBPFM
> > > >
> > > > $ grep libperl ../make-log_perf-python3.10-install_bin.txt
> > > > 9:Makefile.config:788: Missing perl devel files. Disabling perl
> > > > scripting support, please install perl-ExtUtils-Embed/libperl-dev
> > > > 22:... libperl: [ OFF ]
> > > >
> > > > Checking for these requirements:
> > > >
> > > > # dpkg -l | grep perl | grep 5.34 | awk '/^ii/ {print $1 " " $2 " "
> > > > $3}' | column -t
> > > > ii libperl-dev:amd64 5.34.0-3
> > > > ii libperl5.34:amd64 5.34.0-3
> > > > ii perl 5.34.0-3
> > > > ii perl-base 5.34.0-3
> > > > ii perl-modules-5.34 5.34.0-3
> > > >
> > > > # dpkg -L perl-modules-5.34 | grep -i ExtUtils | grep -i Embed
> > > > /usr/share/perl/5.34.0/ExtUtils/Embed.pm
> > > >
> > > > Can you please comment on this?
> > >
> > > hi,
> > > is there something in tools/build/feature/test-libperl.make.output ?
> > >
> >
> > Hey jirka!
> >
> > Indeed there is such a file.
> >
> > $ LC_ALL=C ll tools/build/feature/test-libperl.make.output
> > -rw-r--r-- 1 dileks dileks 24K Mar 6 03:22
> > tools/build/feature/test-libperl.make.output
> >
> > Reproducer:
> >
> > make distclean
> > make -C tools/perf clean
> >
> > MAKE="make"
> > MAKE_OPTS="HOSTCC=clang-13 HOSTCXX=clang++-13 HOSTLD=ld.lld-13
> > HOSTAR=llvm-ar-13 CC=clang-13 LD=ld.lld-13 AR=llvm-ar-13 NM=llvm-nm-13
> > OBJCOPY=llvm-objcopy-13 OBJDUMP=llvm-objdump-13 OBJSIZE=llvm-size-13
> > READELF=llvm-readelf-13 STRIP=llvm-strip-13 LLVM_IAS=1"
> >
> > LC_ALL=C $MAKE V=1 $MAKE_OPTS -C tools/perf PYTHON=python3 install-bin
>
> yea, looks like we can't compile perl devel includes with clang,
> we use simple perl test program:
>
> $ cd tools/build/feature/
> $ cat test-libperl.c
> // SPDX-License-Identifier: GPL-2.0
> #include <EXTERN.h>
> #include <perl.h>
>
> int main(void)
> {
> perl_alloc();
>
> return 0;
> }
>
>
> and if I compile it with:
>
> $ CC=clang make test-libperl.bin
> clang -MD -Wall -Werror -o test-libperl.bin test-libperl.c > test-libperl.make.output 2>&1 `perl -MExtUtils::Embed -e ccopts 2>/dev/null` -Wl,--enable-new-dtags -Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -fstack-protector-strong -L/usr/local/lib -L/usr/lib64/perl5/CORE -lperl -lpthread -lresolv -ldl -lm -lcrypt -lutil -lc
> make: *** [Makefile:224: test-libperl.bin] Error 1
>
>
> I'm getting some other lto related error:
>
> $ cat test-libperl.make.output
> clang-13: error: optimization flag '-ffat-lto-objects' is not supported [-Werror,-Wignored-optimization-argument]
>
Hehe.
I was thinking about syncing the flags for both feature test-perl and
perf/libperl-support.
tools/build/feature/Makefile
tools/perf/Makefile.config
So, I guess FLAGS_PERL_EMBED differs.
For building perf '-ffat-lto-objects' is filtered-out...
$ git grep ffat-lto-objects tools/perf/
tools/perf/Makefile.config: PERL_EMBED_CCOPTS := $(filter-out
-flto=auto -ffat-lto-objects, $(PERL_EMBED_CCOPTS))
- Sedat -
>
> with my clang version:
>
> $ clang --version
> clang version 13.0.0 (Fedora 13.0.0-3.fc35)
> Target: x86_64-redhat-linux-gnu
> Thread model: posix
> InstalledDir: /usr/bin
>
> so you need to figure out how to compile the test program
> above first with clang
>
> jirka
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