Numerous linker failures after successful compile phase. Here's the first: Linking CXX shared library libKF5KExiv2.so cd /var/tmp/portage/kde-apps/libkexiv2-16.04.3/work/libkexiv2-16.04.3_build/src && /usr/bin/cmake -E cmake_link_script CMakeFiles/KF5KExiv2.dir/link.txt --verbose=1 /usr/bin/x86_64-pc-linux-gnu-g++ -fPIC -march=native -O2 -pipe -std=c++0x -Wall -Wextra -Wcast-align -Wchar-subscripts -Wformat-security -Wno-long-long -Wpointer-arith -Wundef -Wnon-virtual-dtor -Woverloaded-virtual -Werror=return-type -pedantic -fexceptions -Wl,--no-undefined -Wl,--fatal-warnings -Wl,--enable-new-dtags -Wl,-O1 -Wl,--as-needed -shared -Wl,-soname,libKF5KExiv2.so.15.0.0 -o libKF5KExiv2.so.5.0.0 CMakeFiles/KF5KExiv2.dir/kexiv2.cpp.o CMakeFiles/KF5KExiv2.dir/kexiv2_p.cpp.o CMakeFiles/KF5KExiv2.dir/kexiv2data.cpp.o CMakeFiles/KF5KExiv2.dir/kexiv2image.cpp.o CMakeFiles/KF5KExiv2.dir/kexiv2comments.cpp.o CMakeFiles/KF5KExiv2.dir/kexiv2exif.cpp.o CMakeFiles/KF5KExiv2.dir/kexiv2iptc.cpp.o CMakeFiles/KF5KExiv2.dir/kexiv2gps.cpp.o CMakeFiles/KF5KExiv2.dir/kexiv2xmp.cpp.o CMakeFiles/KF5KExiv2.dir/kexiv2previews.cpp.o CMakeFiles/KF5KExiv2.dir/rotationmatrix.cpp.o CMakeFiles/KF5KExiv2.dir/libkexiv2_debug.cpp.o CMakeFiles/KF5KExiv2.dir/KF5KExiv2_automoc.cpp.o -lexiv2 /usr/lib64/libQt5Gui.so.5.6.1 /usr/lib64/libQt5Core.so.5.6.1 CMakeFiles/KF5KExiv2.dir/kexiv2.cpp.o: In function `KExiv2Iface::KExiv2::load(QString const&) const': kexiv2.cpp:(.text+0x2be9): undefined reference to `Exiv2::ImageFactory::open(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool)' kde-apps/libkexiv2-15.08.3 also suffers a similar problem. Reproducible: Always $ emerge --info 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, 4.7.2-gentoo x86_64) ================================================================= System uname: Linux-4.7.2-gentoo-x86_64-Intel-R-_Core-TM-_i7-5820K_CPU_@_3.30GHz-with-gentoo-2.3 KiB Mem: 32908348 total, 10285324 free KiB Swap: 4194300 total, 4194300 free Timestamp of repository gentoo: Sat, 03 Sep 2016 02:45:01 +0000 sh bash 4.3_p46 ld GNU ld (Gentoo 2.26.1 p1.0) 2.26.1 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 dev-util/cmake: 3.6.1::gentoo dev-util/pkgconfig: 0.29.1::gentoo sys-apps/baselayout: 2.3::gentoo sys-apps/openrc: 0.21.7::gentoo sys-apps/sandbox: 2.10-r2::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r2::gentoo sys-devel/automake: 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://serv.prhnet/gentoo-portage priority: -1000 prh-local location: /usr/local/portage masters: gentoo priority: 0 floppym location: /var/lib/layman/floppym sync-type: laymansync sync-uri: https://bitbucket.org/floppym/floppym-overlay masters: gentoo priority: 50 Installed sets: @sysbase ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* !PUEL" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/bin/startx /usr/lib64/libreoffice/program/sofficerc /usr/share/applications/boincmgr-boinc.desktop /usr/share/config /usr/share/gkrellm2/themes/invisible /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 -O2 -pipe" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--backtrack=30 --autounmask=n --with-bdeps y --keep-going --nospinner" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs buildpkg config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync multilib-strict news parallel-fetch parallel-install preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://mirror.bytemark.co.uk/gentoo/ http://mirror.qubenet.net/mirror/gentoo/ http://gentoo.virginmedia.com/" LANG="en_GB.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j24 --load-average=60" 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 acl acpi alsa amd64 berkdb branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cups cxx dbus declarative dri dts dvd dvdr emboss encode exif fam firefox flac gdbm gif glamor gpm gtk handbook iconv icu ipv6 jpeg kde kipi lcms libnotify mad mmx mmxext mng modules mp3 mp4 mpeg multilib ncurses nls nptl ogg opencl opengl openmp pam pango pch pcre pdf phonon plasma png policykit ppds qml qt3support qt4 qt5 readline sdl seccomp semantic-desktop session spell sse sse2 ssl startup-notification svg symlink tcpd tiff truetype udev udisks unicode upower usb vaapi vdpau vorbis widgets wxwidgets x264 xattr xcb xcomposite 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 avx2 fma3 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="evdev" KERNEL="linux" L10N="en-GB en" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en_GB en" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby20 ruby21" USERLAND="GNU" VIDEO_CARDS="amdgpu radeonsi" 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, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
Created attachment 444876 [details] emerge --info =kde-apps/libkexiv2-16.04.3::gentoo
GCC upgrade without reading news items? https://wiki.gentoo.org/wiki/Upgrading_from_gcc-4.x_to_gcc-5.x
Created attachment 444878 [details] emerge -pqv =kde-apps/libkexiv2-16.04.3::gentoo
Created attachment 444882 [details] Complete build log
Created attachment 444884 [details] Build environment
(In reply to Andreas Sturmlechner from comment #2) > GCC upgrade without reading news items? > > https://wiki.gentoo.org/wiki/Upgrading_from_gcc-4.x_to_gcc-5.x Looks like it. Sorry. I did read that news item, but now I've built a new system and overlooked it. Rebuilding 300-odd packages now. I'll close the bug if this fixes the problem.
It will fix your problem.
Indeed it has. <sigh> so many things to remember, so little memory remaining to do it with.
