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Hi, and thanks for taking a look. So, trying to merge www-client/firefox-60.2.2 here. I have seen some cryptic error messages from Portage, then I have seen some weird error messages, and now this one wins the cake: [ebuild N ] www-client/firefox-60.2.2::net-kit USE="dbus eme-free gmp-autoupdate hwaccel jack screenshot system-harfbuzz system-jpeg system-libevent system-libvpx -bindist -custom-cflags -custom-optimization -debug -geckodriver -hardened (-neon) -pulseaudio (-selinux) -startup-notification (-system-icu) (-system-sqlite) -test -wifi" L10N="-ach -af -an -ar -as -ast -az -bg -bn-BD -bn-IN -br -bs -ca -cak -cs -cy -da -de -dsb -el -en-GB -en-ZA -eo -es-AR -es-CL -es-ES -es-MX -et -eu -fa -ff -fi -fr -fy -ga -gd -gl -gn -gu -he -hi -hr -hsb -hu -hy -id -is -it -ja -ka -kab -kk -km -kn -ko -lij -lt -lv -mai -mk -ml -mr -ms -nb -nl -nn -or -pa -pl -pt-BR -pt-PT -rm -ro -ru -si -sk -sl -son -sq -sr -sv -ta -te -th -tr -uk -uz -vi -xh -zh-CN -zh-TW" 0 KiB (...) * ERROR: www-client/firefox-60.2.2::net-kit failed (configure phase): * USE Flag 'clang' not in IUSE for www-client/firefox-60.2.2 * * Call stack: * ebuild.sh, line 92: Called src_configure * environment, line 5620: Called use 'clang' * phase-helpers.sh, line 247: Called die * The specific snippet of code: * die "USE Flag '${u}' not in IUSE for ${CATEGORY}/${PF}" Your insight about what is going on here would be much appreciated. P.s.: working in a chroot-ed environment here. build.log emerge_info_output.txt environment

Necktwi@funtoo:~ $ emerge --info '=sys-devel/clang-6.0.0-r1::llvm-kit' | wgetpaste Your paste can be seen here: https://paste.pound-python.org/show/K3BiPPKqiB7o7YFV0Ki8/ Necktwi@funtoo:~ $ emerge -pqv '=sys-devel/clang-6.0.0-r1::llvm-kit' | wgetpaste Your paste can be seen here: https://paste.pound-python.org/show/HCAX7yC6n9jYb5R1bBBp/ Necktwi@funtoo:~ $ sudo cat /var/tmp/portage/sys-devel/clang-6.0.0-r1/temp/build.log| wgetpaste Your paste can be seen here: https://paste.pound-python.org/show/FCQgLsrdBL7uCqO3ykDR/ Necktwi@funtoo:~ $ sudo cat /var/tmp/portage/sys-devel/clang-6.0.0-r1/temp/environment | wgetpaste Your paste can be seen here: https://paste.pound-python.org/show/I1ZqrIxaSJ788Qp2E3Pj/

I'm curious if there is any current effort to track packages not building under Clang/LLVM. FreeBSD switched as a default, and I've heard that Debian was considering a switch at one point. Gentoo seemed to have an effort to track packages, but it seems like it may have fallen off the radar. There are some major blockers, like glibc, but the list already seems fairly small. Are there any formal plans for support Clang/LLVM as a system compiler going forward?