On my system, the package does not build due to an error in the matroska demux module, even with use flag matroska disabled. See attached logs.
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Inline last lines of build log: libtool: link: /bin/grep -E -e "^vlc_entry" ".libs/libqt_plugin.exp" > ".libs/libqt_plugin.expT" libtool: link: mv -f ".libs/libqt_plugin.expT" ".libs/libqt_plugin.exp" libtool: link: x86_64-pc-linux-gnu-g++ -fPIC -DPIC -shared -nostdlib /usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/../../../../lib64/crti.o /usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/crtbeginS.o gui/qt/.libs/libqt_plugin_la-qt.o gui/qt/.libs/libqt_plugin_la-menus.o gui/qt/.libs/libqt_plugin_la-main_interface.o gui/qt/.libs/libqt_plugin_la-dialogs_provider.o gui/qt/.libs/libqt_plugin_la-input_manager.o gui/qt/.libs/libqt_plugin_la-actions_manager.o gui/qt/.libs/libqt_plugin_la-extensions_manager.o gui/qt/managers/.libs/libqt_plugin_la-addons_manager.o gui/qt/.libs/libqt_plugin_la-recents.o gui/qt/adapters/.libs/libqt_plugin_la-seekpoints.o gui/qt/adapters/.libs/libqt_plugin_la-chromaprint.o gui/qt/adapters/.libs/libqt_plugin_la-variables.o gui/qt/dialogs/.libs/libqt_plugin_la-playlist.o gui/qt/dialogs/.libs/libqt_plugin_la-bookmarks.o gui/qt/dialogs/.libs/libqt_plugin_la-preferences.o gui/qt/dialogs/.libs/libqt_plugin_la-mediainfo.o gui/qt/dialogs/.libs/libqt_plugin_la-epg.o gui/qt/dialogs/.libs/libqt_plugin_la-extended.o gui/qt/dialogs/.libs/libqt_plugin_la-messages.o gui/qt/dialogs/.libs/libqt_plugin_la-errors.o gui/qt/dialogs/.libs/libqt_plugin_la-external.o gui/qt/dialogs/.libs/libqt_plugin_la-plugins.o gui/qt/dialogs/.libs/libqt_plugin_la-sout.o gui/qt/dialogs/.libs/libqt_plugin_la-convert.o gui/qt/dialogs/.libs/libqt_plugin_la-help.o gui/qt/dialogs/.libs/libqt_plugin_la-gototime.o gui/qt/dialogs/.libs/libqt_plugin_la-toolbar.o gui/qt/dialogs/.libs/libqt_plugin_la-open.o gui/qt/dialogs/.libs/libqt_plugin_la-openurl.o gui/qt/dialogs/.libs/libqt_plugin_la-vlm.o gui/qt/dialogs/.libs/libqt_plugin_la-firstrun.o gui/qt/dialogs/.libs/libqt_plugin_la-podcast_configuration.o gui/qt/dialogs/.libs/libqt_plugin_la-extensions.o gui/qt/dialogs/.libs/libqt_plugin_la-fingerprintdialog.o gui/qt/components/.libs/libqt_plugin_la-extended_panels.o gui/qt/components/.libs/libqt_plugin_la-info_panels.o gui/qt/components/.libs/libqt_plugin_la-info_widgets.o gui/qt/components/.libs/libqt_plugin_la-preferences_widgets.o gui/qt/components/.libs/libqt_plugin_la-complete_preferences.o gui/qt/components/.libs/libqt_plugin_la-simple_preferences.o gui/qt/components/.libs/libqt_plugin_la-open_panels.o gui/qt/components/.libs/libqt_plugin_la-interface_widgets.o gui/qt/components/.libs/libqt_plugin_la-controller.o gui/qt/components/.libs/libqt_plugin_la-controller_widget.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGChannels.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGItem.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGProgram.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGRuler.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGView.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGWidget.o gui/qt/components/playlist/.libs/libqt_plugin_la-views.o gui/qt/components/playlist/.libs/libqt_plugin_la-vlc_model.o gui/qt/components/playlist/.libs/libqt_plugin_la-playlist_model.o gui/qt/components/playlist/.libs/libqt_plugin_la-playlist_item.o gui/qt/components/playlist/.libs/libqt_plugin_la-standardpanel.o gui/qt/components/playlist/.libs/libqt_plugin_la-playlist.o gui/qt/components/playlist/.libs/libqt_plugin_la-selector.o gui/qt/components/sout/.libs/libqt_plugin_la-profile_selector.o gui/qt/components/sout/.libs/libqt_plugin_la-sout_widgets.o gui/qt/util/.libs/libqt_plugin_la-animators.o gui/qt/util/.libs/libqt_plugin_la-input_slider.o gui/qt/util/.libs/libqt_plugin_la-timetooltip.o gui/qt/util/.libs/libqt_plugin_la-customwidgets.o gui/qt/util/.libs/libqt_plugin_la-searchlineedit.o gui/qt/util/.libs/libqt_plugin_la-registry.o gui/qt/util/.libs/libqt_plugin_la-qmenuview.o gui/qt/util/.libs/libqt_plugin_la-qt_dirs.o gui/qt/util/.libs/libqt_plugin_la-pictureflow.o gui/qt/util/.libs/libqt_plugin_la-validators.o gui/qt/util/buttons/.libs/libqt_plugin_la-BrowseButton.o gui/qt/util/buttons/.libs/libqt_plugin_la-DeckButtonsLayout.o gui/qt/util/buttons/.libs/libqt_plugin_la-RoundButton.o gui/qt/util/.libs/libqt_plugin_la-imagehelper.o gui/qt/styles/.libs/libqt_plugin_la-seekstyle.o gui/qt/.libs/libqt_plugin_la-main_interface.moc.o gui/qt/.libs/libqt_plugin_la-menus.moc.o gui/qt/.libs/libqt_plugin_la-dialogs_provider.moc.o gui/qt/.libs/libqt_plugin_la-input_manager.moc.o gui/qt/.libs/libqt_plugin_la-actions_manager.moc.o gui/qt/.libs/libqt_plugin_la-extensions_manager.moc.o gui/qt/managers/.libs/libqt_plugin_la-addons_manager.moc.o gui/qt/.libs/libqt_plugin_la-recents.moc.o gui/qt/adapters/.libs/libqt_plugin_la-seekpoints.moc.o gui/qt/adapters/.libs/libqt_plugin_la-chromaprint.moc.o gui/qt/adapters/.libs/libqt_plugin_la-variables.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-playlist.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-bookmarks.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-mediainfo.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-extended.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-messages.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-epg.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-errors.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-external.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-plugins.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-preferences.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-sout.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-convert.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-help.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-gototime.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-toolbar.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-open.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-openurl.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-podcast_configuration.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-vlm.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-firstrun.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-extensions.moc.o gui/qt/dialogs/.libs/libqt_plugin_la-fingerprintdialog.moc.o gui/qt/components/.libs/libqt_plugin_la-extended_panels.moc.o gui/qt/components/.libs/libqt_plugin_la-info_panels.moc.o gui/qt/components/.libs/libqt_plugin_la-info_widgets.moc.o gui/qt/components/.libs/libqt_plugin_la-preferences_widgets.moc.o gui/qt/components/.libs/libqt_plugin_la-complete_preferences.moc.o gui/qt/components/.libs/libqt_plugin_la-simple_preferences.moc.o gui/qt/components/.libs/libqt_plugin_la-open_panels.moc.o gui/qt/components/.libs/libqt_plugin_la-interface_widgets.moc.o gui/qt/components/.libs/libqt_plugin_la-controller.moc.o gui/qt/components/.libs/libqt_plugin_la-controller_widget.moc.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGChannels.moc.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGProgram.moc.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGRuler.moc.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGView.moc.o gui/qt/components/epg/.libs/libqt_plugin_la-EPGWidget.moc.o gui/qt/components/playlist/.libs/libqt_plugin_la-views.moc.o gui/qt/components/playlist/.libs/libqt_plugin_la-vlc_model.moc.o gui/qt/components/playlist/.libs/libqt_plugin_la-playlist_model.moc.o gui/qt/components/playlist/.libs/libqt_plugin_la-playlist.moc.o gui/qt/components/playlist/.libs/libqt_plugin_la-standardpanel.moc.o gui/qt/components/playlist/.libs/libqt_plugin_la-selector.moc.o gui/qt/components/sout/.libs/libqt_plugin_la-profile_selector.moc.o gui/qt/components/sout/.libs/libqt_plugin_la-sout_widgets.moc.o gui/qt/util/.libs/libqt_plugin_la-animators.moc.o gui/qt/util/.libs/libqt_plugin_la-input_slider.moc.o gui/qt/util/.libs/libqt_plugin_la-timetooltip.moc.o gui/qt/util/.libs/libqt_plugin_la-customwidgets.moc.o gui/qt/util/.libs/libqt_plugin_la-searchlineedit.moc.o gui/qt/util/.libs/libqt_plugin_la-qmenuview.moc.o gui/qt/util/.libs/libqt_plugin_la-qvlcapp.moc.o gui/qt/util/.libs/libqt_plugin_la-pictureflow.moc.o gui/qt/util/.libs/libqt_plugin_la-validators.moc.o gui/qt/util/buttons/.libs/libqt_plugin_la-RoundButton.moc.o gui/qt/util/buttons/.libs/libqt_plugin_la-DeckButtonsLayout.moc.o gui/qt/util/buttons/.libs/libqt_plugin_la-BrowseButton.moc.o gui/qt/styles/.libs/libqt_plugin_la-seekstyle.moc.o gui/qt/.libs/libqt_plugin_la-resources.o -Wl,-rpath -Wl,/var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1/src/.libs ../compat/.libs/libcompat.a -L/usr/lib64/sidplay/builders/ ../src/.libs/libvlccore.so -lidn -lpthread -ldl -ldbus-1 -Wl,--as-needed -lQt5Svg -lQt5Widgets -lQt5X11Extras -lQt5Gui -lQt5Core -lX11 -L/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0 -L/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/../../../../x86_64-pc-linux-gnu/lib -L/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/../../.. -lstdc++ -lm -lc -lgcc_s /usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/crtendS.o /usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/../../../../lib64/crtn.o -march=core-avx2 -O2 -ggdb -Wl,-O1 -Wl,-z -Wl,defs -Wl,-soname -Wl,libqt_plugin.so -Wl,-retain-symbols-file -Wl,.libs/libqt_plugin.exp -o .libs/libqt_plugin.so libtool: link: ( cd ".libs" && rm -f "libqt_plugin.la" && ln -s "../libqt_plugin.la" "libqt_plugin.la" ) make[4]: Leaving directory '/var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1/modules' make[3]: *** [Makefile:27329: all-recursive] Error 1 make[3]: Leaving directory '/var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1/modules' make[2]: *** [Makefile:12436: all] Error 2 make[2]: Leaving directory '/var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1/modules' make[1]: *** [Makefile:1530: all-recursive] Error 1 make[1]: Leaving directory '/var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1' make: *** [Makefile:1415: all] Error 2 * ERROR: media-video/vlc-3.0.1-r1::gentoo failed (compile phase): * emake failed * * If you need support, post the output of `emerge --info '=media-video/vlc-3.0.1-r1::gentoo'`, * the complete build log and the output of `emerge -pqv '=media-video/vlc-3.0.1-r1::gentoo'`. * The complete build log is located at '/var/log/portage/media-video:vlc-3.0.1-r1:20180324-114547.log.gz'. * The ebuild environment file is located at '/var/tmp/portage/media-video/vlc-3.0.1-r1/temp/environment'. * Working directory: '/var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1' * S: '/var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1'
emerge --info: Portage 2.3.24 (python 2.7.14-final-0, default/linux/amd64/17.0, gcc-7.3.0, glibc-2.26-r6, 4.15.11-gentoo_1 x86_64) ================================================================= System uname: Linux-4.15.11-gentoo_1-x86_64-Intel-R-_Core-TM-_i7-4800MQ_CPU_@_2.70GHz-with-gentoo-2.4.1 KiB Mem: 16390376 total, 5078140 free KiB Swap: 20970488 total, 20970472 free Timestamp of repository gentoo: Sat, 24 Mar 2018 09:45:01 +0000 Head commit of repository gentoo: b272f01ac9a8cad378882a31b0a442f04c2d015b Head commit of repository gentoo-snappy: 0ea79c799ebe1bc6cd924b9dd707b710eea24e83 sh bash 4.4_p19 ld GNU ld (Gentoo 2.30 p1) 2.30.0 app-shells/bash: 4.4_p19::gentoo dev-java/java-config: 2.2.0-r4::gentoo dev-lang/perl: 5.26.1-r2::gentoo dev-lang/python: 2.7.14-r1::gentoo, 3.4.6-r1::gentoo, 3.5.4-r1::gentoo, 3.6.4::gentoo dev-util/cmake: 3.10.3::gentoo dev-util/pkgconfig: 0.29.2::gentoo sys-apps/baselayout: 2.4.1-r2::gentoo sys-apps/openrc: 0.35.5::gentoo sys-apps/sandbox: 2.13::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r4::gentoo sys-devel/automake: 1.11.6-r3::gentoo, 1.16.1-r1::gentoo sys-devel/binutils: 2.30::gentoo sys-devel/gcc: 6.4.0-r1::gentoo, 7.3.0::gentoo sys-devel/gcc-config: 1.9.1::gentoo sys-devel/libtool: 2.4.6-r4::gentoo sys-devel/make: 4.2.1-r3::gentoo sys-kernel/linux-headers: 4.15::gentoo (virtual/os-headers) sys-libs/glibc: 2.26-r6::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.de.gentoo.org/gentoo-portage priority: -1000 sync-rsync-verify-metamanifest: no sync-rsync-extra-opts: my_local_overlay location: /usr/local/portage masters: gentoo priority: 0 asux location: /var/lib/layman/asux masters: gentoo priority: 50 brother-overlay location: /var/lib/layman/brother-overlay sync-type: laymansync sync-uri: git://github.com/stefan-langenmaier/brother-overlay.git masters: gentoo priority: 50 fw-overlay location: /var/lib/layman/fw-overlay sync-type: laymansync sync-uri: https://github.com/no-hope/fw-overlay.git masters: gentoo priority: 50 gentoo-snappy location: /usr/local/portage/gentoo-snappy sync-type: git sync-uri: https://github.com/zyga/gentoo-snappy.git masters: gentoo priority: 50 go-overlay location: /var/lib/layman/go-overlay sync-type: laymansync sync-uri: https://github.com/Dr-Terrible/go-overlay.git masters: gentoo priority: 50 torbrowser location: /var/lib/layman/torbrowser sync-type: laymansync sync-uri: git://github.com/MeisterP/torbrowser-overlay.git masters: gentoo priority: 50 ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=core-avx2 -O2 -pipe -ggdb" 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 /var/bind" 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=core-avx2 -O2 -pipe -ggdb" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--keep-going -j --load-average 12.0 --with-bdeps=y" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs compress-build-logs compressdebug config-protect-if-modified distlocks ebuild-locks fail-clean fixlafiles merge-sync multilib-strict news parallel-fetch parallel-install preserve-libs protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://mirror.netcologne.de/gentoo/" LANG="de_DE.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="de" MAKEOPTS="-j8" PKGDIR="/usr/portage/packages" PORTAGE_COMPRESS="gzip" 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 Xaw3d a52 aac aalib acl acpi alsa amd64 apache2 audiofile bash-completion berkdb bluetooth branding bsf bzip2 cairo caps cdda cddb cdparanoia cdr cli consolekit crypt css cups curl cvs cxx dbus dga directfb djvu dri dts dv dvd dvdr encode exif fbcon ffmpeg firefox flac fontconfig fortran ftp gd gdbm gif gimp glut gnome gnuplot gphoto2 gpm gstreamer gtk gtk3 gtkhtml gzip handbook iconv icq icu idn ieee1394 imagemagick imap imlib innodb ipv6 jabber java java6 javascript jingle jpeg jpeg2k kde latex lcms ldap libnotify lm_sensors lzma lzo mad matroska mhash mime mng modules mono motif mozilla mp3 mp4 mpeg mplayer musicbrainz mysql mysqli ncurses nls nptl ocamlopt odbc ofx ogg openexr opengl openmp pam pcmcia pcre pdf pic plasma png policykit posix postgres ppds pulseaudio qt3support qt5 rdesktop readline recode rss ruby samba sasl sdl seccomp sharedmem shorten smp sockets sound spell sqlite sqlite3 ssl startup-notification subversion svg syslog tcl tcpd theora threads tidy tiff truetype udev udisks unicode upower usb vaapi vhosts vim-syntax vnc vorbis wifi wmf wxwidgets x264 xattr xcb xcomposite xft xine xinerama xml xmpp xosd xpm xscreensaver xsl xv xvid zlib zsh-completion" 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="actions alias auth_basic auth_digest authn_anon authn_core authn_dbd authn_dbm authn_default authn_file authz_core authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock dbd deflate dir disk_cache env expires ext_filter file_cache filter headers ident imagemap include info log_config logio mem_cache mime mime_magic negotiation proxy proxy_ajp proxy_connect proxy_http rewrite setenvif so socache_shmcb speling status unique_id unixd userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" 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 isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" GRUB_PLATFORMS="efi-64" INPUT_DEVICES="evdev synaptics" KERNEL="linux" L10N="de" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6 php7-0" POSTGRES_TARGETS="postgres9_5" PYTHON_SINGLE_TARGET="python3_5" PYTHON_TARGETS="python2_7 python3_5" QEMU_SOFTMMU_TARGETS="i386 x86_64" QEMU_USER_TARGETS="i386 x86_64" RUBY_TARGETS="ruby22 ruby23 ruby24 ruby25" USERLAND="GNU" VIDEO_CARDS="intel i965 vesa" 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_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
relevant part of the build log from above the last lines from comment 1: libtool: link: ( cd ".libs" && rm -f "libncurses_plugin.la" && ln -s "../libncurses_plugin.la" "libncurses_plugin.la" ) ../doltlibtool --tag=CC --mode=link x86_64-pc-linux-gnu-gcc -march=core-avx2 -O2 -pipe -ggdb -Wall -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wvolatile-register-var -Wformat -Wformat-security -Wbad-function-cast -Wwrite-strings -Wmissing-prototypes -Werror-implicit-function-declaration -Winit-self -Wlogical-op -Wshadow=local -fvisibility=hidden -avoid-version -module -export-symbols-regex ^vlc_entry -shrext .so -no-undefined ../compat/libcompat.la ../src/libvlccore.la -Wl,-O1 -Wl,--as-needed -L/usr/lib64/sidplay/builders/ -Wl,-z,defs -o libconsole_logger_plugin.la -rpath /usr/lib64/vlc/plugins/logger logger/console.lo libtool: link: ( cd ".libs" && rm -f "libdemux_chromecast_plugin.la" && ln -s "../libdemux_chromecast_plugin.la" "libdemux_chromecast_plugin.la" ) ../doltlibtool --tag=CC --mode=link x86_64-pc-linux-gnu-gcc -march=core-avx2 -O2 -pipe -ggdb -Wall -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wvolatile-register-var -Wformat -Wformat-security -Wbad-function-cast -Wwrite-strings -Wmissing-prototypes -Werror-implicit-function-declaration -Winit-self -Wlogical-op -Wshadow=local -fvisibility=hidden -avoid-version -module -export-symbols-regex ^vlc_entry -shrext .so -no-undefined ../compat/libcompat.la ../src/libvlccore.la -Wl,-O1 -Wl,--as-needed -L/usr/lib64/sidplay/builders/ -Wl,-z,defs -o libfile_logger_plugin.la -rpath /usr/lib64/vlc/plugins/logger logger/file.lo libtool: link: /usr/bin/x86_64-pc-linux-gnu-nm -B keystore/.libs/memory.o keystore/.libs/list_util.o | sed -n -e 's/^.*[ ]\([ABCDGIRSTW][ABCDGIRSTW]*\)[ ][ ]*\([_A-Za-z][_A-Za-z0-9]*\)$/\1 \2 \2/p' | sed '/ __gnu_lto/d' | /bin/sed 's/.* //' | sort | uniq > .libs/libmemory_keystore_plugin.exp demux/mkv/.libs/libmkv_plugin_la-matroska_segment.o: In function `matroska_segment_c::ParseSimpleTags(SimpleTag*, libmatroska::KaxTagSimple*, int)': /var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1/modules/demux/mkv/matroska_segment.cpp:304: undefined reference to `libebml::EbmlString::operator std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&() const' demux/mkv/.libs/libmkv_plugin_la-matroska_segment_parse.o: In function `KaxChapterLanguage_handler': /var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1/modules/demux/mkv/matroska_segment_parse.cpp:1207: undefined reference to `libebml::EbmlString::operator std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&() const' demux/mkv/.libs/libmkv_plugin_la-matroska_segment_parse.o: In function `KaxChapterCountry_handler': /var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1/modules/demux/mkv/matroska_segment_parse.cpp:1211: undefined reference to `libebml::EbmlString::operator std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&() const' demux/mkv/.libs/libmkv_plugin_la-matroska_segment_parse.o: In function `KaxTrackLanguage_handler': /var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1/modules/demux/mkv/matroska_segment_parse.cpp:352: undefined reference to `libebml::EbmlString::operator std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&() const' demux/mkv/.libs/libmkv_plugin_la-matroska_segment_parse.o: In function `KaxCodecID_handler': /var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1/modules/demux/mkv/matroska_segment_parse.cpp:359: undefined reference to `libebml::EbmlString::operator std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&() const' demux/mkv/.libs/libmkv_plugin_la-matroska_segment_parse.o:/var/tmp/portage/media-video/vlc-3.0.1-r1/work/vlc-3.0.1/modules/demux/mkv/matroska_segment_parse.cpp:360: more undefined references to `libebml::EbmlString::operator std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&() const' follow collect2: error: ld returned 1 exit status make[4]: *** [Makefile:16447: libmkv_plugin.la] Error 1 make[4]: *** Waiting for unfinished jobs....
You forgot to rebuild dev-libs/libebml and media-libs/libmatroska after switching GCC version. The only valid part of this bug report is: (In reply to Ole Langbehn from comment #0) > even with use flag matroska disabled Apparently "matroska" USE flag does not affect call to econf in >=media-video/vlc-3.
confirmed that rebuilding libebml and libmatroska allows me to build vlc-3.0.1-r1. Thanks. Out of curiosity, how can I tell that a rebuild with the new GCC is required?
It can be guessed from error messages from linker shown in comment #3: undefined reference to `libebml::EbmlString::operator std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&() const' See https://gcc.gnu.org/gcc-7/porting_to.html#conversion-op-mangling 'std::string()' is the short alias for 'std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&()'.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=9dc8bf3867b9029c622655b6417e349aa0ac0dcf commit 9dc8bf3867b9029c622655b6417e349aa0ac0dcf Author: Andreas Sturmlechner <asturm@gentoo.org> AuthorDate: 2018-04-10 21:34:33 +0000 Commit: Andreas Sturmlechner <asturm@gentoo.org> CommitDate: 2018-04-10 21:34:51 +0000 media-video/vlc: Add missing USE=matroska build switch Closes: https://bugs.gentoo.org/651354 Package-Manager: Portage-2.3.28, Repoman-2.3.9 media-video/vlc/vlc-3.0.1-r1.ebuild | 1 + media-video/vlc/vlc-3.0.9999.ebuild | 1 + media-video/vlc/vlc-9999.ebuild | 1 + 3 files changed, 3 insertions(+)
