mold: fatal: opening Source/WebCore/CMakeFiles/WebCore.dir/./__/__/WebCore/DerivedSources/unified-sources/UnifiedSource-950a39b6-18.cpp.o failed: Too many open files Portage 3.0.66.1 (python 3.12.8-final-0, default/linux/amd64/23.0/no-multilib/hardened, gcc-14, glibc-2.40-r5, 6.12.10-gentoo-dist-hardened x86_64) ================================================================= System Settings ================================================================= System uname: Linux-6.12.10-gentoo-dist-hardened-x86_64-12th_Gen_Intel-R-_Core-TM-_i5-1235U-with-glibc2.40 KiB Mem: 11952372 total, 1506180 free KiB Swap: 11959552 total, 11617492 free Timestamp of repository gentoo: Tue, 21 Jan 2025 14:03:31 +0000 Head commit of repository gentoo: f579125037be617637ce3c61c8f56dbdadcbc693 sh bash 5.2_p37 ld GNU ld (Gentoo 2.43 p3) 2.43.1 app-misc/pax-utils: 1.3.8::gentoo app-shells/bash: 5.2_p37::gentoo dev-build/autoconf: 2.13-r8::gentoo, 2.72-r1::gentoo dev-build/automake: 1.16.5-r2::gentoo dev-build/cmake: 3.30.6::gentoo dev-build/libtool: 2.5.4::gentoo dev-build/make: 4.4.1-r100::gentoo dev-build/meson: 1.5.2::gentoo dev-lang/perl: 5.40.0-r1::gentoo dev-lang/python: 3.12.8_p1::gentoo, 3.13.1_p1::gentoo dev-lang/rust-bin: 1.83.0::gentoo llvm-core/clang: 19.1.7::gentoo llvm-core/lld: 19.1.7::gentoo llvm-core/llvm: 19.1.7::gentoo sys-apps/baselayout: 2.17::gentoo sys-apps/openrc: 0.56::gentoo sys-apps/sandbox: 2.39::gentoo sys-devel/binutils: 2.43-r2::gentoo sys-devel/binutils-config: 5.5.2::gentoo sys-devel/gcc: 14.2.1_p20250118::gentoo sys-devel/gcc-config: 2.11::gentoo sys-kernel/linux-headers: 6.6-r1::gentoo (virtual/os-headers) sys-libs/glibc: 2.40-r5::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: git sync-uri: https://anongit.gentoo.org/git/repo/sync/gentoo.git priority: -1000 volatile: False local location: /var/db/repos/local masters: gentoo volatile: False Installed sets: @base, @gnomie, @utils ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="@FREE" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -pipe -flto -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /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/sandbox.d" CXXFLAGS="-march=native -O2 -pipe -flto -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing" DISTDIR="/var/cache/distfiles" 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="-march=native -O2 -pipe -flto -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing" 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 merge-wait multilib-strict network-sandbox news parallel-fetch pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-march=native -O2 -pipe -flto -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing" GENTOO_MIRRORS="http://distfiles.gentoo.org" LANG="C.UTF8" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs -flto -fuse-ld=mold" LEX="flex" MAKEOPTS="-j6 -l8" 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" RUSTFLAGS=" -C target-cpu=native" SHELL="/bin/bash" USE="acl amd64 aom avif bzip2 cet clang crypt dbus dist-kernel elogind flac fontconfig gdbm gdk-pixbuf gif gnome gnome-keyring gstreamer gtk gtk4 hardened harfbuzz iconv icu ipv6 jpeg jpegxl keyring lcms libtirpc lto lz4 lzma lzo modemmanager ncurses networkmanager nls openmp opus orc pam pcre pdf pgo pic pie pipewire png policykit profile readline screencast seccomp sound spell ssl ssp svg test-rust tiff tpm udev udisks unicode upower usb vaapi vpx vulkan wayland webp xattr xml xtpax zlib zstd" ABI_X86="64" ADA_TARGET="gcc_13" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_anon authn_dbm authn_file authz_dbm authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir env expires ext_filter file_cache filter headers include info log_config logio 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="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt rdrand sha sse sse2 sse3 sse4_1 sse4_2 ssse3 vpclmulqdq" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax navcom oceanserver oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 tsip tripmate tnt ublox" GUILE_SINGLE_TARGET="3-0" GUILE_TARGETS="3-0" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-2" POSTGRES_TARGETS="postgres16" PYTHON_SINGLE_TARGET="python3_12" PYTHON_TARGETS="python3_12" RUBY_TARGETS="ruby32" VIDEO_CARDS="intel" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipp2p iface geoip fuzzy condition tarpit sysrq proto logmark ipmark dhcpmac delude chaos account" 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, LINGUAS, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PYTHONPATH, RANLIB, READELF, SIZE, STRINGS, STRIP, YACC, YFLAGS ================================================================= Package Settings ================================================================= net-libs/webkit-gtk-2.46.5-r410::local was built with the following: USE="avif gstreamer introspection jpegxl jumbo-build keyring lcms pdf (seccomp) spell wayland -X (-aqua) -examples -gamepad -systemd" CFLAGS="-march=native -O2" CXXFLAGS="-march=native -O2" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs -fuse-ld=mold -Wl,--no-keep-memory" !!! /etc/portage/package.env references non-existent file: /etc/portage/env/clanglto3 net-libs/webkit-gtk-2.46.5-r600::local was built with the following: USE="avif gstreamer introspection jpegxl jumbo-build keyring lcms pdf (seccomp) spell wayland -X (-aqua) -examples -gamepad -systemd" CFLAGS="-march=native -O3 -pipe -flto=thin" CXXFLAGS="-march=native -O3 -pipe -flto=thin" LDFLAGS="-Wl,-O1 -Wl,--as-needed -fuse-ld=lld -Wl,--no-keep-memory"
Heres my clang env file used for webkit COMMON_FLAGS="-march=native -O3 -pipe -flto=thin" CFLAGS="${COMMON_FLAGS}" CXXFLAGS="${COMMON_FLAGS}" FCFLAGS="${COMMON_FLAGS}" FFLAGS="${COMMON_FLAGS}" LDFLAGS="${LDFLAGS} -fuse-ld=mold" # https://gitlab.com/rahilarious/gentoo-config/- # /blob/main/etc/portage/make.conf/hardware # Optimize GO and C intimate sessions CGO_CFLAGS="${COMMON_FLAGS}" CGO_CXXFLAGS="${COMMON_FLAGS}" CGO_FFLAGS="${COMMON_FLAGS}" CGO_LDFLAGS="${LDFLAGS}" RUSTFLAGS="${RUSTFLAGS} -C linker=clang -C linker-plugin-lto" CC="clang" CXX="clang++" #CPP="clang-cpp" AR="llvm-ar" NM="llvm-nm" RANLIB="llvm-ranlib" GOAMD64="v3" CGO_CFLAGS="${CFLAGS}" CGO_CXXFLAGS="${CXXFLAGS}" CGO_FFLAGS="${FFLAGS}" CGO_LDFLAGS="${LDFLAGS}"
It's really a mold bug.
This only happens with clang+lto+mold, with gcc its fine
