I seem to be hitting this bug: https://bugs.gentoo.org/show_bug.cgi?id=513386
webkit-gtk fails: GNUmakefile:40431: recipe for target 'Programs/GtkLauncher' failed make[1]: *** [Programs/GtkLauncher] Error 1 make[1]: *** Waiting for unfinished jobs.... Source/WebKit/gtk/webkit/webkitversion.h:37: Warning: WebKit: symbol='WEBKITGTK_API_VERSION': Unknown namespace for symbol 'WEBKITGTK_API_VERSION' /var/tmp/portage/net-libs/webkit- gtk-2.4.8/work/webkitgtk-2.4.8/.libs/libwebkitgtk-3.0.so: undefined reference to `_ZNSt6chrono3_V212steady_clock3nowEv@GLIBCXX_3.4.19' /var/tmp/portage/net-libs/webkit- gtk-2.4.8/work/webkitgtk-2.4.8/.libs/libjavascriptcoregtk-3.0.so: undefined reference to `_ZNSt6chrono3_V212system_clock3nowEv@GLIBCXX_3.4.19' collect2: error: ld returned 1 exit status linking of temporary binary failed: Command '['/bin/sh', './libtool', '-- mode=link', '--tag=CC', '--silent', 'i686-pc-linux-gnu-gcc', '-o', '/var/tmp/portage/net-libs/webkit-gtk-2.4.8/work/webkitgtk-2.4.8/tmp- introspectdaQWqM/WebKit-3.0', '-export-dynamic', '-O2', '-march=i686', '- pipe', '-pthread', '-std=c99', '-Wno-deprecated-declarations', '-Wl,-O1', '- Wl,--as-needed', '-Wl,--no-keep-memory', '-Wl,--reduce-memory-overheads', '- Wl,--no-demangle', '/var/tmp/portage/net-libs/webkit- gtk-2.4.8/work/webkitgtk-2.4.8/tmp-introspectdaQWqM/WebKit-3.0.o', '-L.', '- lwebkitgtk-3.0', '-ljavascriptcoregtk-3.0', '-Wl,--export-dynamic', '- lgmodule-2.0', '-pthread', '-lgtk-3', '-lgdk-3', '-lpangocairo-1.0', '- lpango-1.0', '-latk-1.0', '-lcairo-gobject', '-lcairo', '-lgdk_pixbuf-2.0', '- lsoup-2.4', '-lgio-2.0', '-lgobject-2.0', '-lglib-2.0']' returned non-zero exit status 1 GNUmakefile:82193: recipe for target 'WebKit-3.0.gir' failed make[1]: *** [WebKit-3.0.gir] Error 1 If I'm reading the bug correctly, it seems to be caused there by having gcc 4.8 installed and having 4.7 active. From comment #30: <quote> gcc ebuild adds /etc/ld.so.conf.d/05gcc-i686-pc-linux-gnu.conf entries, sorted by version. During compilation, API from *active* version is used. During linking, ABI from the first *listed* version is used. If those two disagree, like it's the case here for c++11, you'll getting various funny results. </quote> That's not the case on my system. I only have version 4.8 installed root@kushiel ~ # gcc-config -l [1] i686-pc-linux-gnu-4.8.3 * root@kushiel ~ # root@kushiel ~ # cat /etc/ld.so.conf.d/05gcc-i686-pc-linux-gnu.conf /usr/lib/gcc/i686-pc-linux-gnu/4.8.3 root@kushiel ~ # There's only one line in the above file, so it should be compiling and linking from the same source. I've reemerged libtool, reemerged glibc and run revdep- rebuild. The two packages built with no errors and revdep comes up with nothing required. Emerging @preserved-rebuilds tries to rebuild webkit-gtk and fails. The full build log for webkit-gtk is WAY to big to post here but I've included emerge --info and -pvq below. Any help or suggestions greatly appreciated. root@kushiel ~ # emerge --info '=net-libs/webkit-gtk-2.4.8::gentoo' Portage 2.2.14 (python 2.7.9-final-0, default/linux/x86/13.0/desktop/kde, gcc-4.8.3, glibc-2.19-r1, 3.18.9-gentoo i686) ================================================================= System Settings ================================================================= System uname: Linux-3.18.9-gentoo-i686-Intel-R-_Core-TM- _i7-2600K_CPU_@_3.40GHz-with-gentoo-2.2 KiB Mem: 16609028 total, 12465696 free KiB Swap: 2097148 total, 2097092 free Timestamp of tree: Thu, 26 Mar 2015 05:30:01 +0000 ld GNU ld (Gentoo 2.24 p1.4) 2.24 app-shells/bash: 4.2_p53 dev-java/java-config: 2.2.0 dev-lang/perl: 5.20.1-r4 dev-lang/python: 2.7.9-r1, 3.3.5-r1, 3.4.1 dev-util/cmake: 2.8.12.2-r1 dev-util/pkgconfig: 0.28-r1 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.13.11 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.11.6-r1, 1.13.4 sys-devel/binutils: 2.24-r3 sys-devel/gcc: 4.6.4, 4.7.3-r1, 4.8.3 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.4 sys-devel/make: 4.1-r1 sys-kernel/linux-headers: 3.16 (virtual/os-headers) sys-libs/glibc: 2.19-r1 Repositories: gentoo retroshare-overlay desktop-effects ACCEPT_KEYWORDS="x86" ACCEPT_LICENSE="*" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=i686 -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib/libreoffice/program/sofficerc /usr/share/config /usr/share/gnupg/qualified.txt /var/lib/hsqldb /var/spool/munin-async/.ssh" 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="-O2 -march=i686 -pipe" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -march=i686 -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" FFLAGS="-O2 -march=i686 -pipe" GENTOO_MIRRORS="rsync://212.219.56.132/www.ibiblio.org/gentoo/ ftp://ftp.klid.dk/gentoo/ rsync://128.61.111.10/gentoo" LANG="en_US.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j8" 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" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/var/lib/layman/retroshare-overlay /var/lib/layman/desktop- effects" USE="3dnow 3dnowext X a52 aac acl acpi additions aio alsa berkdb bluetooth branding bsf bzip2 cairo cdda cdr cgraph cli consolekit cracklib crypt cuda cups cxx dbus declarative device-mapper dri dts dvd dvdr emboss emerald encode exif extras fam ffmpeg firefox flac flash fontconfig fortran gd gdbm gif glamor gnutls gpm graphviz gstreamer gtk gtk3 gudev h323 hwdb iconv icu introspection ipv6 ithreads java joystick jpeg kde kdepim keymap kipi lame lcms ldap libav libkms libnotify mad mikmod minizip mmx mmxext mng mod modules mp3 mp4 mpeg mpg123 mudflap mysql ncurses nls nptl nptlonly nsplugin nss nvidia ofx ogg opengl openmp opus pam pango pcre pdf perl phonon plasma png policykit ppds pppd python qt3support qt4 readline reports samba sasl script sdl semantic- desktop session sip sipim soprano spell sql sqlite sse sse2 ssl ssse3 startup- notification static-libs subversion svg sysfs system-ffmpeg tcpd theora threads tiff tk truetype udev udisks unicode upower usb uvm vhost-net video vim-syntax vlc vorbis wav webkit win32codecs wxwidgets x264 x86 xcb xcomposite xinerama xml xmp xorg xscreensaver xulrunner xv xvid zlib" ABI_X86="32" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1 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" INPUT_DEVICES="keyboard mouse evdev wacom" 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_3" RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="nvidia" 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: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, SYNC, USE_PYTHON root@kushiel ~ # emerge -pqv '=net-libs/webkit-gtk-2.4.8::gentoo' [ebuild U ] net-libs/webkit-gtk-2.4.8 [2.4.7] USE="X egl geoloc gstreamer introspection jit opengl spell webgl (-aqua) -coverage -debug -gles2 - libsecret {-test} -wayland" -- "When a thing is funny, search it for a hidden truth." - George Bernard Shaw