After following the guidelines on the wiki page for clang/llvm+lto (wiki.gentoo.org/wiki/Clang) www-client/chromium-52.0.2743.49 fails to compile. Other packages compile just fine with exactly the same settings, while this ebuild compiles fine with gcc. [809/809] clang++ -Wl,-O1 -Wl,--as-needed -flto -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -pthread -Wl,-z,noexecstack -fPIC -m64 -m64 -Wl,-O1 -Wl,--as-needed -Wl,--gc-sections -o mksnapshot -Wl,--start-group obj/v8/src/snapshot/mksnapshot.mksnapshot.o obj/v8/src/libv8_base.a obj/v8/src/libv8_nosnapshot.a obj/v8/src/libv8_libplatform.a obj/third_party/icu/libicui18n.a obj/third_party/icu/libicuuc.a obj/v8/src/libv8_libbase.a -Wl,--end-group -ldl -lrt FAILED: mksnapshot clang++ -Wl,-O1 -Wl,--as-needed -flto -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -pthread -Wl,-z,noexecstack -fPIC -m64 -m64 -Wl,-O1 -Wl,--as-needed -Wl,--gc-sections -o mksnapshot -Wl,--start-group obj/v8/src/snapshot/mksnapshot.mksnapshot.o obj/v8/src/libv8_base.a obj/v8/src/libv8_nosnapshot.a obj/v8/src/libv8_libplatform.a obj/third_party/icu/libicui18n.a obj/third_party/icu/libicuuc.a obj/v8/src/libv8_libbase.a -Wl,--end-group -ldl -lrt /usr/bin/x86_64-pc-linux-gnu-ld: internal error in add_writer, at /var/tmp/portage/sys-devel/binutils-2.25.1-r1/work/binutils-2.25.1/gold/token.h:124 x86_64-pc-linux-gnu-clang-3.8: error: linker command failed with exit code 1 (use -v to see invocation) ninja: build stopped: subcommand failed. * ERROR: www-client/chromium-52.0.2743.49::gentoo failed (compile phase): * (no error message) * * Call stack: * ebuild.sh, line 115: Called src_compile * environment, line 5170: Called die * The specific snippet of code: * eninja -C out/Release mksnapshot || die; * * MemTotal: 8006708 kB * SwapTotal: 16777212 kB emerge --info '=www-client/chromium-52.0.2743.49::gentoo' Portage 2.3.0 (python 2.7.11-final-0, default/linux/amd64/13.0/desktop/plasma, gcc-5.4.0, glibc-2.23-r2, 4.6.3-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-4.6.3-gentoo-x86_64-Intel-R-_Core-TM-_i7-3632QM_CPU_@_2.20GHz-with-gentoo-2.2 KiB Mem: 8006708 total, 69824 free KiB Swap: 16777212 total, 15134480 free Timestamp of repository gentoo: Mon, 04 Jul 2016 12:30:01 +0000 sh bash 4.3_p46 ld GNU gold (Gentoo 2.25.1 p1.1 2.25.1) 1.11 distcc 3.2rc1 x86_64-pc-linux-gnu [disabled] app-shells/bash: 4.3_p46::gentoo dev-java/java-config: 2.2.0-r3::gentoo dev-lang/perl: 5.24.0-r1::gentoo dev-lang/python: 2.7.11-r2::gentoo, 3.4.4::gentoo, 3.5.1-r3::gentoo dev-util/cmake: 3.5.2-r1::gentoo dev-util/pkgconfig: 0.29.1::gentoo sys-apps/baselayout: 2.2-r1::gentoo sys-apps/openrc: 0.21.1::gentoo sys-apps/sandbox: 2.10-r2::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r2::gentoo sys-devel/automake: 1.11.6-r2::gentoo, 1.13.4-r1::gentoo, 1.14.1-r1::gentoo, 1.15-r2::gentoo sys-devel/binutils: 2.25.1-r1::gentoo sys-devel/gcc: 5.4.0::gentoo sys-devel/gcc-config: 1.8-r1::gentoo sys-devel/libtool: 2.4.6-r2::gentoo sys-devel/make: 4.2.1::gentoo sys-kernel/linux-headers: 4.6::gentoo (virtual/os-headers) sys-libs/glibc: 2.23-r2::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -mtune=native -O2 -pipe -fomit-frame-pointer" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/maven-bin-3.3/conf" 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 /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-march=native -mtune=native -O2 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="ftp://gentoo.imj.fr/pub/gentoo/ http://gentoo.modulix.net/gentoo/ http://mirror.qubenet.net/mirror/gentoo/ http://91.121.188.201/gentoo-distfiles/ ftp://ftp.free.fr/mirrors/ftp.gentoo.org/" LANG="en_US" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j9" PKGDIR="/usr/portage/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="/var/tmp" USE="X a52 aac aalib acl acpi alsa amd64 berkdb bluetooth branding bzip2 cairo cdda cdr clang cli consolekit cracklib crypt cups custom-cflags cxx dbus declarative dri dts dvd dvdr emboss encode exif fam ffmpeg firefox flac fortran gcj gdbm gif glamor gold gtk iconv icu ipv6 jpeg kde kipi lcms ldap libcaca libnotify mad mbim mmx mmxext mng modemmanager modules mp3 mp4 mpeg multilib ncurses networkmanager nls nptl ogg opengl openmp pam pango pcre pdf phonon plasma png policykit ppds pulseaudio qml qt3support qt4 qt5 readline sdl seccomp semantic-desktop session spell sse sse2 ssl startup-notification svg symlink tcpd tiff touchpad truetype udev udisks unicode upower usb vorbis widgets wxwidgets x264 xattr xcb xcomposite xinerama xml xscreensaver xv xvid zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" 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="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" GRUB_PLATFORMS="efi-64" INPUT_DEVICES="synaptics evdev keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby20 ruby21" USERLAND="GNU" VIDEO_CARDS="intel i965" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON ================================================================= Package Settings ================================================================= www-client/chromium-52.0.2743.49::gentoo was built with the following: USE="cups custom-cflags hangouts (pic) proprietary-codecs pulseaudio system-ffmpeg tcmalloc (-gn) -gnome -gnome-keyring (-gtk3) -hidpi -hotwording -kerberos (-neon) (-selinux) -test -widevine" ABI_X86="64" LINGUAS="am ar bg bn ca cs da de el en_GB es es_419 et fa fi fil fr gu he hi hr hu id it ja kn ko lt lv ml mr ms nb nl pl pt_BR pt_PT ro ru sk sl sr sv sw ta te th tr uk vi zh_CN zh_TW" CFLAGS="-march=ivybridge -mmmx -msse -msse2 -msse3 -mssse3 -mcx16 -msahf -maes -mpclmul -mpopcnt -mavx -msse4.2 -msse4.1 -mrdrnd -mf16c -mfsgsbase -mfxsr -mxsave -mxsaveopt --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=6144 -mtune=ivybridge -fstack-protector-strong -O2 -pipe -fomit-frame-pointer" CXXFLAGS="-march=ivybridge -mmmx -msse -msse2 -msse3 -mssse3 -mcx16 -msahf -maes -mpclmul -mpopcnt -mavx -msse4.2 -msse4.1 -mrdrnd -mf16c -mfsgsbase -mfxsr -mxsave -mxsaveopt --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=6144 -mtune=ivybridge -fstack-protector-strong -O2 -pipe -fomit-frame-pointer" emerge -pqv '=www-client/chromium-52.0.2743.49::gentoo' [ebuild R ] www-client/chromium-52.0.2743.49 USE="cups custom-cflags hangouts (pic) proprietary-codecs pulseaudio system-ffmpeg tcmalloc (-gn) -gnome -gnome-keyring (-gtk3) -hidpi -hotwording -kerberos (-neon) (-selinux) {-test} -widevine" LINGUAS="am ar bg bn ca cs da de el en_GB es es_419 et fa fi fil fr gu he hi hr hu id it ja kn ko lt lv ml mr ms nb nl pl pt_BR pt_PT ro ru sk sl sr sv sw ta te th tr uk vi zh_CN zh_TW"
Sounds like a toolchain (llvm) bug to me. You're going to have to spend a bit more effort in figuring this out if you want us to fix it.
The problem disappears when disabling LTO. This is definitely not a gentoo bug. Sorry!
