The QT6 installation is cross compiled using crossdev with QT_HOST_PATH=/. In this setup /usr/lib64/qt6/bin/qtpaths6 is a shell script instead of it being an EFL executable. This file belongs to dev-qt/qtbase. The shell script executes itself making it useless. qtpaths6 is called in various situations and when that happens it results in a OOM situation. The build host does not have this issue -- it has identical configuration. Reproducible: Always Portage 3.0.65 (python 3.12.6-final-0, !../custom-profiles-gentoo/profiles/mypc/, gcc-14, glibc-2.39-r6, 6.10.7-gentoo-gentoo-dist x86_64) ================================================================= System uname: Linux-6.10.7-gentoo-gentoo-dist-x86_64-12th_Gen_Intel-R-_Core-TM-_i3-12100-with-glibc2.39 KiB Mem: 32615132 total, 23604100 free KiB Swap: 5242876 total, 4967964 free Head commit of repository oubliette: dd3a60bb2ba6afa8de4b2ceb2ddcdf2425270e35 Timestamp of repository gentoo: Sun, 20 Oct 2024 00:45:00 +0000 sh bash 5.2_p37 ld GNU ld (Gentoo 2.42 p6) 2.42.0 ccache version 4.10.1 [enabled] app-misc/pax-utils: 1.3.7::gentoo app-shells/bash: 5.2_p37::gentoo dev-build/make: 4.4.1-r1::gentoo dev-java/java-config: 2.3.4::gentoo dev-lang/perl: 5.40.0::gentoo dev-lang/python: 3.11.10_p1::gentoo, 3.12.6_p4::gentoo dev-lang/rust: 1.81.0::gentoo dev-util/ccache: 4.10.1::gentoo sys-apps/baselayout: 2.15::gentoo sys-apps/sandbox: 2.39::gentoo sys-apps/systemd: 255.11::gentoo sys-devel/binutils: 2.42-r2::gentoo sys-devel/binutils-config: 5.5.2::gentoo sys-devel/clang: 15.0.7-r3::gentoo sys-devel/gcc: 14.2.1_p20240921::gentoo sys-devel/gcc-config: 2.11::gentoo sys-devel/lld: 15.0.7::gentoo sys-devel/llvm: 15.0.7-r3::gentoo sys-kernel/linux-headers: 6.6-r1::gentoo (virtual/os-headers) sys-libs/glibc: 2.39-r6::gentoo Repositories: custom-profiles location: /etc/custom-profiles-gentoo masters: gentoo volatile: True oubliette location: /var/db/repos/oubliette sync-type: git sync-uri: https://github.com/nabbi/oubliette-overlay masters: gentoo priority: 50 volatile: False gentoo location: /usr/portage sync-type: git sync-uri: https://github.com/gentoo-mirror/gentoo priority: 100 volatile: True ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=alderlake -mabm -mno-cldemote -mno-kl -mno-pconfig -mno-sgx -mno-widekl -mshstk --param=l1-cache-line-size=64 --param=l1-cache-size=48 --param=l2-cache-size=12288 -fomit-frame-pointer -floop-interchange -floop-strip-mine -floop-block -fgraphite-identity -ftree-loop-distribution -O3 -pipe -flto=1 -fuse-linker-plugin -ffat-lto-objects" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /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-php8.2/ext-active/ /etc/php/cgi-php8.2/ext-active/ /etc/php/cli-php8.2/ext-active/ /etc/php/fpm-php8.2/ext-active/ /etc/php/phpdbg-php8.2/ext-active/ /etc/revdep-rebuild /etc/sandbox.d" CXXFLAGS="-march=alderlake -mabm -mno-cldemote -mno-kl -mno-pconfig -mno-sgx -mno-widekl -mshstk --param=l1-cache-line-size=64 --param=l1-cache-size=48 --param=l2-cache-size=12288 -fomit-frame-pointer -floop-interchange -floop-strip-mine -floop-block -fgraphite-identity -ftree-loop-distribution -O3 -pipe -flto=1 -fuse-linker-plugin -ffat-lto-objects" DISTDIR="/var/cache/distfiles/" EMERGE_DEFAULT_OPTS="--with-bdeps=n --complete-graph --binpkg-respect-use=y --binpkg-changed-deps=n --changed-deps=n --rebuild-if-new-slot=y --load-average 8" ENV_UNSET="ABI_X86 ACCEPT_LICENSE APACHE2_MODULES APACHE2_MPMS CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GDK_PIXBUF_MODULE_FILE GOBIN GOPATH L10N NGINX_MODULES_HTTP PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT VIDEO_CARDS XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg-live candy ccache config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync 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" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="https://mirror.leaseweb.com/gentoo/ http://mirror.csclub.uwaterloo.ca/gentoo-distfiles/" LANG="en_US.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs" LEX="flex" MAKEOPTS="-j12" PKGDIR="/mnt/systmp/packages" 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="/tmp" SHELL="/bin/bash" USE="a52 aac acpi adns alsa alt-svc amd64 amrenc asm asyncns atm avif bluetooth branding bzip2 cairo cet crypt custom-cflags dav1d dbus declarative dri dts dv dvbpsi editorconfig eglfs enca encode exif faad fdk ffmpeg flac fontconfig gif gles2 gles2-only glslang gmp gstreamer gui heif http2 iconv idn ipv6 jit jpeg jpeg2k jpegxl kde kf6compat lame libdrm libinput libnotify libsamplerate libtirpc lto mad man matroska mikmod minimal mmap modplug mp3 mp4 mpeg mprisi multilib natspec ncurses networkmanager offensive ogg opencl opengl openmp opus orc pam pcre pdf pgo plasma png policykit ppds pulseaudio qml qt6 quicktime raw readline seccomp smp sound spell ssl startup-notification strip svg svt-av1 symlink system-png systemd taglib tcmalloc test-rust theora threads tiff tls-compression truetype twolame uchardet udev udisks unicode upower usb v4l vaapi verify-sig vorbis vpx vulkan wallpaper-metadata wayland webp widgets wxwidgets x264 x265 xft xvid zlib" ABI_X86="64" ADA_TARGET="gcc_12" APACHE2_MODULES="unixd authn_core authz_core authz_host access_compat alias auth_basic authn_file log_config mime log_config proxy proxy_http rewrite proxy_balancer lbmethod_bybusyness lbmethod_byrequests lbmethod_bytraffic lbmethod_heartbeat slotmem_shm env cache dir cgid headers proxy_connect http2 allowmethods auth_digest actions" APACHE2_MPMS="event" CALLIGRA_FEATURES="karbon sheets words" CAMERAS="ptp2" 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" 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" GRUB_PLATFORMS="pc efi-64" GUILE_SINGLE_TARGET="3-0" GUILE_TARGETS="3-0" INPUT_DEVICES="libinput" KERNEL="linux" L10N="en-US en" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LIBREOFFICE_EXTENSIONS="nlpsolver pdfimport" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" NGINX_MODULES_HTTP="access fastcgi gzip gzip_static limit_req rewrite upstream_check proxy" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-2" POSTGRES_TARGETS="postgres16" PYTHON_SINGLE_TARGET="python3_12" PYTHON_TARGETS="python3_11 python3_12" QEMU_SOFTMMU_TARGETS="x86_64" 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, 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, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS
Any hopes regarding this? It still persists. Rest of QT and applications (including a complete KDE DE) compile and works perfectly (no QT related issues). file /usr/lib64/qt6/bin/qtpaths6 /usr/x86_64-mypc-linux-gnu/usr/lib64/qt6/bin/qtpaths6 /usr/lib64/qt6/bin/qtpaths6: ELF 64-bit LSB pie executable, x86-64, version 1 (GNU/Linux), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, stripped /usr/x86_64-mypc-linux-gnu/usr/lib64/qt6/bin/qtpaths6: POSIX shell script, ASCII text executable
I cross-compiled qtbase the other day when someone asked me to check whether it worked. I used MYCMAKEARGS="-DQT_HOST_PATH=/usr". I can at least confirm the behaviour you are seeing. I just tried again with -DQT_BUILD_TOOLS_WHEN_CROSS_COMPILING=yes, but that didn't help. This isn't a priority for me, but I'll see what I can do.
Thanks! As of now, the binary can be copied from another non-cross host.
I've had another quick look at this. Adding -DQT_NO_GENERATE_QMAKE_WRAPPER_FOR_TARGET=yes stops it from installing the broken wrapper. Annoyingly, it still doesn't install the real qmake and friends.
Adding -DQT_FORCE_BUILD_TOOLS=yes fixes it, but it also installs some scripts like host-qmake. I'll see whether we can avoid those.
Okay, all those flags together do the trick. I'll do a little more testing and then get this merged.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=a631496f102c4b1dbc40e643eccb7f477fd24e53 commit a631496f102c4b1dbc40e643eccb7f477fd24e53 Author: James Le Cuirot <chewi@gentoo.org> AuthorDate: 2025-02-20 22:37:13 +0000 Commit: James Le Cuirot <chewi@gentoo.org> CommitDate: 2025-02-20 22:37:46 +0000 dev-qt/qtbase: Fix cross-compiling with some CMake variables Closes: https://bugs.gentoo.org/942359 Closes: https://bugs.gentoo.org/949214 Signed-off-by: James Le Cuirot <chewi@gentoo.org> dev-qt/qtbase/qtbase-6.8.2-r2.ebuild | 6 ++++++ dev-qt/qtbase/qtbase-6.8.9999.ebuild | 6 ++++++ dev-qt/qtbase/qtbase-6.9.9999.ebuild | 8 +++++++- dev-qt/qtbase/qtbase-6.9999.ebuild | 8 +++++++- 4 files changed, 26 insertions(+), 2 deletions(-)
This may have some serious consequences. I was trying to upgrade to kde-frameworks/kwidgetsaddons-6.10.0 when -- Incompatible processor. This Qt build requires the following features: waitpkg gfni vaes CMake Warning at /usr/share/ECM/modules/ECMQueryQt.cmake:95 (message): Failed call: /usr/x86_64-mypc-linux-gnu/usr/lib64/qt6/bin/qtpaths --query QT_INSTALL_PREFIX Call Stack (most recent call first): /usr/share/ECM/kde-modules/KDEInstallDirs6.cmake:197 (ecm_query_qt) /usr/share/ECM/kde-modules/KDEInstallDirs.cmake:15 (include) CMakeLists.txt:14 (include) The toolchain is executing /usr/x86_64-mypc-linux-gnu/usr/lib64/qt6/bin/qtpaths instead of /usr/lib64/qt6/bin/qtpaths.
I'm not sure if "serious consequences" is quite right -- it didn't work at all before. Now, is it a problem? Yes, but you should file a new bug for that.
(In reply to James Le Cuirot from comment #6) > Okay, all those flags together do the trick. I'll do a little more testing > and then get this merged. Thanks for the fix, but this block -- tc-is-cross-compiler && mycmakeargs+=( is causing problems while cross compiling package which build against QT. Removing this block resolve the issue. I'm filing a new bug report with the details of the issue it created.
