Created attachment 332884 [details]
build.log

I am running into issues while building gtk+-3.20.8 with ld.gold. After switching back to ld.bfd the build went through without problems.

libtool: link: x86_64-pc-linux-gnu-gcc -o /var/tmp/portage/x11-libs/gtk+-3.20.8/work/gtk+-3.20.8-abi_x86_64.amd64/gdk/tmp-introspectRej5IW/.libs/Gdk-3.0 -O2 -pipe -Wall -Wl,-O1 tmp-introspectRej5IW/var/tmp/portage/x11-libs/gtk+-3.20.8/work/gtk+-3.20.8-abi_x86_64.amd64/gdk/tmp-introspectRej5IW/Gdk-3.0.o -Wl,--export-dynamic -pthread -Wl,--export-dynamic  -Wl,--as-needed -L. ./.libs/libgdk-3.so -lpangocairo-1.0 -lpango-1.0 -lgdk_pixbuf-2.0 -lcairo-gobject -lfontconfig -lfreetype -lXinerama -lXi -lXrandr -lXcursor -lXcomposite -lXdamage -lXfixes -lxkbcommon -lwayland-cursor -lwayland-egl -lwayland-client -lX11 -lXext -lcairo -lepoxy -lm -lgio-2.0 -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 -pthread
./.libs/libgdk-3.so: error: undefined reference to 'shm_open'
./.libs/libgdk-3.so: error: undefined reference to 'shm_unlink'
collect2: error: ld returned 1 exit status
linking of temporary binary failed: Command '[u'/bin/sh', u'../libtool', u'--mode=link', u'--tag=CC', 'x86_64-pc-linux-gnu-gcc', u'-o', u'/var/tmp/portage/x11-libs/gtk+-3.20.8/work/gtk+-3.20.8-abi_x86_64.amd64/gdk/tmp-introspectRej5IW/Gdk-3.0', u'-export-dynamic', '-O2', '-pipe', '-Wall', '-Wl,-O1', '-Wl,--as-needed', u'tmp-introspectRej5IW/var/tmp/portage/x11-libs/gtk+-3.20.8/work/gtk+-3.20.8-abi_x86_64.amd64/gdk/tmp-introspectRej5IW/Gdk-3.0.o', '-L.', 'libgdk-3.la', u'-lgio-2.0', u'-lgobject-2.0', u'-Wl,--export-dynamic', u'-lgmodule-2.0', u'-pthread', u'-lglib-2.0']' returned non-zero exit status 1
make[4]: *** [/usr/share/gobject-introspection-1.0/Makefile.introspection:156: Gdk-3.0.gir] Error 1

I am also including gentoo's emerge --info and build.log in case you need to know more about my environment:
emerge --info =x11-libs/gtk+-3.20.8
Portage 2.3.0 (python 2.7.12-final-0, default/linux/amd64/13.0/desktop/plasma, gcc-5.4.0, glibc-2.23-r2, 4.7.0-gentoo x86_64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-4.7.0-gentoo-x86_64-Intel-R-_Core-TM-_i7-3632QM_CPU_@_2.20GHz-with-gentoo-2.2
KiB Mem:     8006536 total,   2237196 free
KiB Swap:   16777212 total,  16777212 free
Timestamp of repository gentoo: Sat, 06 Aug 2016 10:00:01 +0000
sh bash 4.3_p46
ld GNU gold (Gentoo 2.26.1 p1.0 2.26.1) 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:          2.7.12::gentoo, 3.4.5::gentoo, 3.5.2::gentoo
dev-util/cmake:           3.6.1::gentoo
dev-util/pkgconfig:       0.29.1::gentoo
sys-apps/baselayout:      2.2-r1::gentoo
sys-apps/openrc:          0.21.3::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:       2.26.1::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: 4.7::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="-O2 -pipe"
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="-O2 -pipe"
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 wayland 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
=================================================================

x11-libs/gtk+-3.20.8::gentoo was built with the following:
USE="X cups introspection wayland xinerama (-aqua) -broadway -cloudprint -colord -examples -test -vim-syntax" ABI_X86="64 -32 -x32"