Использую sys-kernel/gentoo-kernel для сборки средстами самого Portage. Нужно определить переменную LLVM=1 для сборки clang-ом, что я и делаю как указано в доках. Проблема в том что при сборке ничего не меняется, не переопределяются переменные при выполнении make.
make -j3 -l3 O=/var/tmp/portage/sys-kernel/gentoo-kernel-6.6.12/work/modprep V=1 HOSTCC=x86_64-pc-linux-gnu-gcc HOSTCXX=x86_64-pc-linux-gnu-g++ 'HOSTCFLAGS=-march=native -mtune=native -O2 -flto -pipe' 'HOSTLDFLAGS=-Wl,-O1 -Wl,--as-needed -Wl,-O2 -Wl,--as-needed' CROSS_COMPILE=x86_64-pc-linux-gnu- AS=x86_64-pc-linux-gnu-as CC=x86_64-pc-linux-gnu-gcc LD=x86_64-pc-linux-gnu-ld.bfd AR=x86_64-pc-linux-gnu-ar NM=x86_64-pc-linux-gnu-nm STRIP=x86_64-pc-linux-gnu-strip OBJCOPY=x86_64-pc-linux-gnu-objcopy OBJDUMP=x86_64-pc-linux-gnu-objdump ARCH=x86 modules_prepare
Смотрим что выводит emerge --info sys-kernel/gentoo-kernel:
sh bash 5.1_p16-r6
ld GNU ld (Gentoo 2.41 p4) 2.41.0
app-misc/pax-utils: 1.3.5::gentoo
app-shells/bash: 5.1_p16-r6::gentoo
dev-build/autoconf: 2.71-r6::gentoo
dev-build/automake: 1.16.5-r1::gentoo
dev-build/cmake: 3.27.9::gentoo
dev-build/libtool: 2.4.7-r1::gentoo
dev-build/make: 4.4.1-r1::gentoo
dev-build/meson: 1.3.0-r2::gentoo
dev-lang/perl: 5.38.2-r1::gentoo
dev-lang/python: 3.11.7::gentoo, 3.12.1_p1::gentoo
dev-lang/rust-bin: 1.74.1::gentoo
sys-apps/baselayout: 2.14-r1::gentoo
sys-apps/openrc: 0.53::gentoo
sys-apps/sandbox: 2.38::gentoo
sys-devel/binutils: 2.41-r3::gentoo
sys-devel/binutils-config: 5.5::gentoo
sys-devel/clang: 16.0.6::gentoo, 17.0.6::gentoo
sys-devel/gcc: 13.2.1_p20230826::gentoo
sys-devel/gcc-config: 2.11::gentoo
sys-devel/lld: 17.0.6::gentoo
sys-devel/llvm: 16.0.6::gentoo, 17.0.6::gentoo
sys-kernel/linux-headers: 6.1::gentoo (virtual/os-headers)
sys-libs/glibc: 2.38-r9::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-verify-jobs: 1
sync-rsync-extra-opts: -4
sync-rsync-verify-metamanifest: yes
sync-rsync-verify-max-age: 24
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -mtune=native -O2 -flto -pipe"
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/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=native -mtune=native -O2 -flto -pipe"
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 -mtune=native -O2 -flto -pipe"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg buildpkg-live 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 xattr"
FFLAGS="-march=native -mtune=native -O2 -flto -pipe"
GENTOO_MIRRORS="https://ftp.fau.de/gentoo"
LANG="en_US.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LEX="flex"
MAKEOPTS="-j3 -l3"
PKGDIR="/var/cache/binpkgs"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_EXTRA_OPTS="-4"
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 a52 aac acl acpi alsa amd64 amdgpu bluetooth branding bzip2 cairo cdda cdr clang cli crypt dbus dri dts dvd dvdr elogind encode exif flac flatpak fortran gdbm gif gles2 gpm graphite gui iconv icu intel ipv6 jit jpeg lcms libnotify libtirpc lto lvm mad mng mp3 mp4 mpeg multilib ncurses nls ogg opengl openmp pam pango pcre pdf pgo pipewire png policykit ppds pulseaudio readline sdl seccomp sound spell split-usr ssl startup-notification svg test-rust thin tiff truetype udev udisks unicode upower usb vaapi vdpau vorbis vulkan wayland wxwidgets x264 xattr xcb xft xinerama xml xv xvid zlib" ABI_X86="64" ADA_TARGET="gnat_2021" 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="mmx mmxext sse sse2 aes avx avx2 f16c fma3 pclmul popcnt rdrand sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 ntrip navcom oceanserver oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 tsip tripmate tnt ublox" GRUB_PLATFORMS="efi-64" INPUT_DEVICES="synaptics libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LLVM_TARGETS="X86 AMDGPU WebAssembly" 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="intel i915 i965 radeon amdgpu radeonsi" 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, PYTHONPATH, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS
=================================================================
Package Settings
=================================================================
sys-kernel/gentoo-kernel-6.6.12::gentoo was built with the following:
USE="initramfs strip -debug -generic-uki -hardened -modules-compress -modules-sign -savedconfig -secureboot -test" ABI_X86="(64)"
CFLAGS=""
CXXFLAGS=""
FEATURES="binpkg-docompress usersync usersandbox network-sandbox xattr buildpkg ipc-sandbox binpkg-multi-instance sandbox assume-digests config-protect-if-modified pid-sandbox userfetch fixlafiles userpriv protect-owned sfperms unmerge-logs pkgdir-index-trusted unmerge-orphans strict binpkg-logs buildpkg-live parallel-fetch qa-unresolved-soname-deps merge-sync ebuild-locks unknown-features-warn distlocks multilib-strict preserve-libs news binpkg-dostrip"
Как видим, что LLVM нет нигде. Он вообще не участвует в сборке.
Я конечно могу сам определить вот так:
/etc/portage/env/llvm-kernel
CC="clang"
CXX="clang++"
LD="ld.lld"
AR="llvm-ar"
NM="llvm-nm"
RANLIB="llvm-ranlib"
AS="llvm-as"
STRIP="llvm-strip"
OBJCOPY="llvm-objcopy"
OBJDUMP="llvm-objdump"
READELF="llvm-readelf"
но проблема же наверное в самом Portage.
