Trying to build Aarch64 toolchain: > sudo crossdev -S -t aarch64-unknown-linux-gnu at stage "Emerging cross-gcc-stage2 ..." i got error: > configure: error: Pthreads are required to build libgomp in "/var/log/portage/cross-aarch64-unknown-linux-gnu-gcc-stage2.log". Also tried last version of tools with > sudo crossdev -C aarch64-unknown-linux-gnu > sudo crossdev -S -t aarch64-unknown-linux-gnu and got same error. Reproducible: Always Steps to Reproduce: sudo crossdev -S -t aarch64-unknown-linux-gnu Actual Results: configure: error: Pthreads are required to build libgomp Expected Results: All installed without error emerge --info: Portage 3.0.41 (python 3.10.9-final-0, default/linux/amd64/17.1/no-multilib, gcc-11, glibc-2.36-r5, 4.19.267-gentoo.sm1 x86_64) ================================================================= System uname: Linux-4.19.267-gentoo.sm1-x86_64-AMD_FX-tm-8320_Eight-Core_Processor-with-glibc2.36 KiB Mem: 16387692 total, 4048448 free KiB Swap: 0 total, 0 free Timestamp of repository gentoo: Wed, 28 Dec 2022 10:30:01 +0000 Head commit of repository gentoo: 372a5a07454d9639208967a510bc62462267a7d8 sh bash 5.1_p16-r2 ld GNU ld (Gentoo 2.38 p4) 2.38 app-misc/pax-utils: 1.3.5::gentoo app-shells/bash: 5.1_p16-r2::gentoo dev-java/java-config: 2.3.1::gentoo dev-lang/perl: 5.36.0-r1::gentoo dev-lang/python: 3.10.9::gentoo, 3.11.1::gentoo dev-lang/rust-bin: 1.65.0::gentoo dev-util/cmake: 3.24.3::gentoo dev-util/meson: 0.63.3::gentoo sys-apps/baselayout: 2.9::gentoo sys-apps/openrc: 0.45.2-r2::gentoo sys-apps/sandbox: 2.29::gentoo sys-devel/autoconf: 2.13-r7::gentoo, 2.71-r5::gentoo sys-devel/automake: 1.16.5::gentoo sys-devel/binutils: 2.38-r2::gentoo sys-devel/binutils-config: 5.4.1::gentoo sys-devel/gcc: 10.4.1_p20221208::gentoo, 11.3.1_p20221209::gentoo sys-devel/gcc-config: 2.8::gentoo sys-devel/libtool: 2.4.7::gentoo sys-devel/llvm: 15.0.6::gentoo sys-devel/make: 4.3::gentoo sys-kernel/linux-headers: 5.15-r3::gentoo (virtual/os-headers) sys-libs/glibc: 2.36-r5::gentoo Repositories: gentoo location: /mnt/stor5/var/db/repos/gentoo sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 sync-rsync-verify-metamanifest: yes sync-rsync-extra-opts: sync-rsync-verify-jobs: 1 sync-rsync-verify-max-age: 24 booboo location: /mnt/stor5/var/lib/layman/booboo masters: gentoo priority: 50 gerislay location: /mnt/stor5/var/lib/layman/gerislay masters: gentoo priority: 50 phackerlay location: /mnt/stor5/var/lib/layman/phackerlay masters: gentoo priority: 50 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -mtune=native" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php8.1/ext-active/ /etc/php/cgi-php8.1/ext-active/ /etc/php/cli-php8.1/ext-active/ /etc/php/fpm-php8.1/ext-active/ /etc/php/phpdbg-php8.1/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe -mtune=native" DISTDIR="/var/cache/distfiles" ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME" FCFLAGS="-O2 -pipe -mtune=native" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg buildpkg-live compressdebug config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe -mtune=native" GENTOO_MIRRORS="http://distfiles.gentoo.org" LANG="ru_RU.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LEX="flex" LINGUAS="en ru" MAKEOPTS="-j6" PKGDIR="/var/cache/binpkgs" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" SHELL="/bin/bash" USE="X aac acl acpi alsa amd64 bzip2 cdr cups curl dbus djvu dri dvd dvdr exif ffmmpeg flac fontconfig ftp gif git gnutls gsm gui gzip iconv icu idn imlib jpeg jpeg2k lcms libglvnd luajit lz4 lzma lzo magic matroska mikmod mng modplug mp3 mp4 mtp musepack nls ogg openal opengl openmp opus pcre pdf png readline sdl slang smp sound speex split-usr startup-notification subversion svg syslog test-rust theora threads tiff timidity truetype udev unicode usb v4l vaapi vcd vdpau vnc vorbis wavpack webp x264 xattr xcb xinerama xpm xv xvid zip zlib" ABI_X86="64" APACHE2_MODULES="alias auth_basic auth_digest authn_core authz_core authz_host autoindex dir mime session socache_shmcb status unixd" CPU_FLAGS_X86="aes avx f16c fma3 fma4 mmx mmxext pclmul popcnt sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 xop" ELIBC="glibc" GRUB_PLATFORMS="pc" INPUT_DEVICES="evdev" KERNEL="linux" L10N="en ru" LLVM_TARGETS="AMDGPU X86" LUA_SINGLE_TARGET="luajit" PYTHON_SINGLE_TARGET="python3_10" PYTHON_TARGETS="python3_10" USERLAND="GNU" VIDEO_CARDS="radeon radeonsi" Unset: ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EMERGE_DEFAULT_OPTS, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LC_ALL, LD, LFLAGS, LIBTOOL, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS
Created attachment 845495 [details] All related journals
If it helps: "crossdev" runs without error using glibc-2.33-r13 (and before). Error "pthreads" occurs first when using glibc-2.34-r10.
Created attachment 853482 [details] stage 2 build logs Same happened here creating an armv7a cross-compiler gcc-12
Not a solution, but compiling aarch64/glibc with USE=static-libs cured the problem for me. (repeated from https://forums.gentoo.org/viewtopic-t-1157929.html)
Just ran into this myself. In my case, the gcc lib that fails to find pthreads is libatomic, but everything else matches what I found in this ticket, including the workaround: adding USE=static-libs to cross-aarch64-unknown-linux-gnueabi/glibc allowed cross-aarch64-unknown-linux-gnueabi/gcc stage2 to build successfully. Worth noting that I had a working cross-compiler before, then didn’t upgrade this box for some 2 years, and after upgrading @world I started running into this error. This would indicate it’s a regression. I tried using gcc-11.3.1_p20230427 (the second-latest stable) as cross-compiler, but that didn’t make a difference; only adding USE=static-libs did. I suspect more and more people will be running into this, as they install or update their working cross-toolchain and find that stage2 builds are broken.
Oh, and I did not try downgrading glibc because there’s only one stable version of glibc for arm64, so I didn’t see the point since I wouldn’t care to see a masked package build successfully.
Created attachment 864588 [details] emerge info + gcc stage2 build logs
Indeed, as zabrinski@gmx.de pointed out, adding static-libs to package use helps. In my case this looked like: $ cat /etc/portage/package.use/cross-armv7a cross-armv7a-unknown-linux-gnueabihf/glibc static-libs Note that it has to be the cross compiled glibc and not the host glibc!
tried to run crossdev --stable --target aarch64_be-unknown-linux-gnu or emerge -q cross-aarch64_be-unknown-linux-gnu/gcc but it kept failing with checking for __atomic_fetch_op for size 8... yes checking for __atomic_fetch_op for size 16... no checking whether byte ordering is bigendian... yes checking for the word size... 8 configure: error: Pthreads are required to build libatomic make[1]: *** [Makefile:17012: configure-target-libatomic] Error 1 make[1]: Leaving directory '/dev/shm/portage/cross-aarch64_be-unknown-linux-gnu/gcc-13.2.1_p20240113-r1/work/build' none of the magic fixes from the comments above have worked, so I came up with my own, which worked for me: --- 8< -------------- echo '!<arch>' > /usr/aarch64_be-unknown-linux-gnu/usr/lib64/libpthread.a --- >8 -------------- voila. perfection. that file was missing on in my BE toolchain, but present in /usr/aarch64-unknown-linux-gnu (the little endian toolchain). merging the cross gcc now works without problems. should I open a new ticket for my case or is it close enough to this ticket here? my use flags: [ebuild R ] cross-aarch64_be-unknown-linux-gnu/gcc-13.2.1_p20240113-r1:13::crossdev USE="cxx hardened openmp (pie) (ssp) zstd -ada -cet -custom-cflags -d -debug -default-stack-clash-protection -default-znow -doc -fixed-point -fortran -go -graphite -ieee-long-double -jit -libssp -lto -modula2 (-multilib) -nls -objc -objc++ -objc-gc (-pch) -pgo -sanitize -systemtap -test -valgrind -vanilla -vtv" 0 KiB [ebuild R ] cross-aarch64_be-unknown-linux-gnu/glibc-2.38-r9:2.2::crossdev USE="caps crypt (ssp) -audit -cet -compile-locales -custom-cflags -doc -gd -hash-sysv-compat -headers-only -multiarch (-multilib) -multilib-bootstrap -nscd -perl -profile (-selinux) -stack-realign -static-libs -suid -systemd -systemtap -test -vanilla" 0 KiB
Surprisingly, the workaround in Comment 9 worked(I had the same compile error). Thank you! # cat /usr/aarch64-unknown-linux-gnu/usr/lib64/libpthread.a !<arch> I didn't try the other workarounds. Used for this: # crossdev --target aarch64-unknown-linux-gnu
