Compiling sys-libs/libcxx (or any c++ project) fails with clang, mold and -flto if sys-libs/musl has been built with ld.mold. Reproducible: Always Steps to Reproduce: Steps to reproduce: 1. Download musl+llvm stage3 tarball https://distfiles.gentoo.org/releases/amd64/autobuilds/current-stage3-amd64-musl-llvm/ (arch-chroot /mnt/gentoo) 2. emerge --sync 3. add `sys-devel/llvm binutils-plugin` to /etc/portage/package.use/custom 4. emerge -1 =sys-devel/llvm-16.0.6 --exclude=llvm:17 5. emerge -1 sys-libs/mold 6. replace /etc/portage/make.conf COMMON_FLAGS="-O2 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -flto" CC="clang" CXX="clang++" CFLAGS="${COMMON_FLAGS}" CXXFLAGS="${COMMON_FLAGS} -stdlib=libc++" FCFLAGS="${COMMON_FLAGS}" FFLAGS="${COMMON_FLAGS}" LDFLAGS="${COMMON_FLAGS} ${LDLIBS} -Wl,-O3 -Wl,--as-needed -Wl,--strip-debug -Wl,--undefined-version -Wl,--icf=safe -Wl,--threads=4 -Wl,--compress-debug-sections=none -fuse-ld=mold -rtlib=c> CHOST="x86_64-gentoo-linux-musl" ACCEPT_KEYWORDS="amd64 ~amd64" LD="ld.mold" LC_MESSAGES=C EMERGE_DEFAULT_OPTS="${EMERGE_DEFAULT_OPTS}" MAKEOPTS="-j4" 7. emerge -1 =sys-libs/musl-1.2.3* sys-libs/libcxx --exclude=sys-devel/llvm Actual Results: -- Found assembler: /usr/lib/llvm/16/bin/x86_64-gentoo-linux-musl-clang -- Detecting C compiler ABI info -- Detecting C compiler ABI info - failed -- Check for working C compiler: /usr/lib/llvm/16/bin/x86_64-gentoo-linux-musl-clang -- Check for working C compiler: /usr/lib/llvm/16/bin/x86_64-gentoo-linux-musl-clang - broken CMake Error at /usr/share/cmake/Modules/CMakeTestCCompiler.cmake:67 (message): The C compiler "/usr/lib/llvm/16/bin/x86_64-gentoo-linux-musl-clang" is not able to compile a simple test program. It fails with the following output: Change Dir: /var/tmp/portage/sys-libs/libcxx-16.0.6/work/runtimes_build-abi_x86_64.amd64/CMakeFiles/CMakeScratch/TryCompile-ankcJC Run Build Command(s):/usr/bin/ninja -v cmTC_391b2 && [1/2] /usr/lib/llvm/16/bin/x86_64-gentoo-linux-musl-clang -O2 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -flto -MD -MT CMakeFiles/cmTC_391b2.dir/testCCompiler.c.o -MF CMakeFiles/cmTC_391b2.dir/testCCompiler.c.o.d -o CMakeFiles/cmTC_391b2.dir/testCCompiler.c.o -c /var/tmp/portage/sys-libs/libcxx-16.0.6/work/runtimes_build-abi_x86_64.amd64/CMakeFiles/CMakeScratch/TryCompile-ankcJC/testCCompiler.c [2/2] : && /usr/lib/llvm/16/bin/x86_64-gentoo-linux-musl-clang -O2 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -flto -O2 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -Wl,-O3 -Wl,--as-needed -Wl,--strip-debug -Wl,--undefined-version -Wl,--icf=safe -Wl,--threads=4 -Wl,--compress-debug-sections=none -fuse-ld=mold -rtlib=compiler-rt -unwindlib=libunwind CMakeFiles/cmTC_391b2.dir/testCCompiler.c.o -o cmTC_391b2 && : FAILED: cmTC_391b2 : && /usr/lib/llvm/16/bin/x86_64-gentoo-linux-musl-clang -O2 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -flto -O2 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -Wl,-O3 -Wl,--as-needed -Wl,--strip-debug -Wl,--undefined-version -Wl,--icf=safe -Wl,--threads=4 -Wl,--compress-debug-sections=none -fuse-ld=mold -rtlib=compiler-rt -unwindlib=libunwind CMakeFiles/cmTC_391b2.dir/testCCompiler.c.o -o cmTC_391b2 && : mimalloc: error: mi_free: pointer does not point to a valid heap space: 0x7f1fbad089b0 clang-16: error: unable to execute command: Segmentation fault (core dumped) clang-16: error: linker command failed due to signal (use -v to see invocation) ninja: build stopped: subcommand failed. CMake will not be able to correctly generate this project. Call Stack (most recent call first): CMakeLists.txt:10 (project) -- Configuring incomplete, errors occurred! Expected Results: Compiling sys-libs/musl with ld.mold should not break mimalloc. !!! No gcc found. You probably need to 'source /etc/profile' !!! to update the environment of this terminal and possibly !!! other terminals also. Portage 3.0.51 (python 3.11.5-final-0, default/linux/amd64/17.0/musl/clang, [unavailable], musl-1.2.3-r8, 6.5.10-gentoo-dist x86_64) ================================================================= System Settings ================================================================= System uname: Linux-6.5.10-gentoo-dist-x86_64-Intel-R-_Core-TM-_i5-7200U_CPU_@_2.50GHz-with-libc KiB Mem: 8003608 total, 3515028 free KiB Swap: 0 total, 0 free Timestamp of repository gentoo: Thu, 09 Nov 2023 00:30:01 +0000 Head commit of repository gentoo: 0411910f6a20c1da3b37ed2fc86ab2b43ae56766 sh bash 5.1_p16-r6 ld LLD 16.0.6 (compatible with GNU linkers) app-misc/pax-utils: 1.3.5::gentoo app-shells/bash: 5.1_p16-r6::gentoo dev-lang/perl: 5.38.0-r1::gentoo dev-lang/python: 3.11.5::gentoo dev-util/cmake: 3.26.5-r2::gentoo dev-util/meson: 1.2.1-r1::gentoo sys-apps/baselayout: 2.14::gentoo sys-apps/openrc: 0.48::gentoo sys-apps/sandbox: 2.38::gentoo sys-devel/autoconf: 2.71-r6::gentoo sys-devel/automake: 1.16.5-r1::gentoo sys-devel/binutils-config: 5.5::gentoo sys-devel/clang: 16.0.6::gentoo sys-devel/libtool: 2.4.7-r1::gentoo sys-devel/lld: 16.0.6::gentoo sys-devel/llvm: 16.0.6::gentoo sys-devel/make: 4.4.1-r1::gentoo sys-kernel/linux-headers: 6.1::gentoo (virtual/os-headers) sys-libs/musl: 1.2.3-r8::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 volatile: False sync-rsync-extra-opts: sync-rsync-verify-metamanifest: yes sync-rsync-verify-max-age: 24 sync-rsync-verify-jobs: 1 Binary Repositories: gentoobinhost priority: 1 sync-uri: https://gentoo.osuosl.org/releases/amd64/binpackages/17.1/x86-64_musl_llvm ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="@FREE" ADDR2LINE="llvm-addr2line" AR="llvm-ar" AS="clang -c" CBUILD="x86_64-gentoo-linux-musl" CC="clang" CFLAGS="-O2 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -flto" CHOST="x86_64-gentoo-linux-musl" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/sandbox.d /etc/terminfo" CPP="clang-cpp" CXX="clang++" CXXFLAGS="-O2 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -flto -stdlib=libc++" DISTDIR="/var/cache/distfiles" EMERGE_DEFAULT_OPTS="" ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GDK_PIXBUF_MODULE_FILE 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 -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -flto" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg-live config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync network-sandbox news parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -flto" GENTOO_MIRRORS="http://distfiles.gentoo.org" INSTALL_MASK="charset.alias /usr/share/locale/locale.alias" LANG="C.UTF8" LD="ld.mold" LDFLAGS="-O2 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -flto -Wl,-O3 -Wl,--as-needed -Wl,--strip-debug -Wl,--undefined-version -Wl,--icf=safe -Wl,--threads=4 -Wl,--compress-debug-sections=none -fuse-ld=mold -rtlib=compiler-rt -unwindlib=libunwind" LEX="flex" MAKEOPTS="-j4" NM="llvm-nm" OBJCOPY="llvm-objcopy" OBJDUMP="llvm-objdump" 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" RANLIB="llvm-ranlib" READELF="llvm-readelf" SHELL="/bin/bash" STRINGS="llvm-strings" STRIP="llvm-strip" USE="acl amd64 bzip2 clang cli crypt dri fortran iconv ipv6 libtirpc llvm-libunwind ncurses nls nptl openmp pam pcre pic readline seccomp split-usr ssl test-rust unicode xattr zlib" ABI_X86="64" ADA_TARGET="gnat_2021" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext sse sse2" ELIBC="musl" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-1" POSTGRES_TARGETS="postgres15" PYTHON_SINGLE_TARGET="python3_11" PYTHON_TARGETS="python3_11" RUBY_TARGETS="ruby31" VIDEO_CARDS="amdgpu fbdev intel nouveau radeon radeonsi vesa dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq proto steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: ARFLAGS, ASFLAGS, CCLD, CONFIG_SHELL, CPPFLAGS, CTARGET, CXXFILT, ELFEDIT, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, LC_ALL, LFLAGS, LIBTOOL, LINGUAS, MAKE, MAKEFLAGS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, RUSTFLAGS, SIZE, YACC, YFLAGS ================================================================= Package Settings ================================================================= sys-libs/libcxx-16.0.6::gentoo was built with the following: USE="(clang) (libcxxabi) static-libs -test -verify-sig" FEATURES="distlocks qa-unresolved-soname-deps binpkg-docompress binpkg-dostrip assume-digests network-sandbox strict parallel-fetch binpkg-multi-instance merge-sync sandbox sfperms binpkg-logs unmerge-orphans userfetch userpriv preserve-libs unmerge-logs buildpkg-live ipc-sandbox fixlafiles usersync news unknown-features-warn usersandbox xattr config-protect-if-modified pid-sandbox ebuild-locks protect-owned"
Created attachment 874389 [details] build.log build.log
Created attachment 874390 [details] make.conf
Similar upstream bug report: https://github.com/rui314/mold/issues/1071
Fixed by https://github.com/rui314/mold/commit/da3f5dd4ecf4faaba466ba41c7c30ba4f8f73bfd (mold-9999.ebuild)
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=2fc10cbc98bebe136012849b28f6969327d6613b commit 2fc10cbc98bebe136012849b28f6969327d6613b Author: Sam James <sam@gentoo.org> AuthorDate: 2023-11-13 02:10:14 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2023-11-13 02:10:14 +0000 sys-devel/mold: backport symbol interposition fix (e.g. mimalloc/musl segfault) Closes: https://bugs.gentoo.org/917089 Signed-off-by: Sam James <sam@gentoo.org> ...d-2.3.2-mimalloc-visibility-interposition.patch | 495 +++++++++++++++++++++ sys-devel/mold/mold-2.3.2-r1.ebuild | 96 ++++ 2 files changed, 591 insertions(+)
(In reply to hugegameartgd from comment #3) > Similar upstream bug report: > https://github.com/rui314/mold/issues/1071 Thank you for persuing it upstream and getting it sorted.