VLC with skins use appears to require xml use. Otherwise VLC complains about not finding an XML reader and can get into a state where it won't run. Reproducible: Always Steps to Reproduce: 1. Use uses "skins -xml" 2. Emerge media-video/vlc 3. Run vlc 4. Change to any custom skin 5. Rerun vlc Actual Results: $ vlc # with "Use native style" option selected VLC media player 2.2.1 Terry Pratchett (Weatherwax) (revision 2.2.1-0-ga425c42) [0000000002519638] core xml reader error: XML reader not found [0000000002472118] core libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. [000000000255b308] qt4 interface error: Unable to load extensions module $ vlc # with "Use custom skin" option selected VLC media player 2.2.1 Terry Pratchett (Weatherwax) (revision 2.2.1-0-ga425c42) [0000000001648678] core xml reader error: XML reader not found [000000000168a338] core interface error: XML provider not found [000000000168a338] skins2 interface error: cannot initialize xml [000000000168a338] skins2 interface error: error while parsing /tmp/vlt8wGNhl/theme.xml [000000000168a338] core interface error: XML provider not found [000000000168a338] skins2 interface error: cannot initialize xml [000000000168a338] skins2 interface error: no skins found : exiting $ Expected Results: Portage to complain about required use during emerge REQUIRED_USE="skins? ( xml truetype X ^^ ( qt4 qt5 ) )" Portage 2.2.23 (python 3.4.3-final-0, default/linux/amd64/13.0, gcc-4.9.3, glibc-2.21-r1, 4.2.3-gentoo x86_64) ================================================================= System uname: Linux-4.2.3-gentoo-x86_64-Intel-R-_Pentium-R-_D_CPU_2.80GHz-with-gentoo-2.2 KiB Mem: 3850188 total, 85028 free KiB Swap: 16777212 total, 16775252 free Timestamp of repository gentoo: Wed, 14 Oct 2015 11:00:01 +0000 sh bash 4.3_p42 ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1 ccache version 3.2.4 [disabled] app-shells/bash: 4.3_p42::gentoo dev-java/java-config: 2.2.0::gentoo dev-lang/perl: 5.22.0::gentoo dev-lang/python: 2.7.10::gentoo, 3.4.3::gentoo dev-util/ccache: 3.2.4::gentoo dev-util/cmake: 3.3.2-r1::gentoo dev-util/pkgconfig: 0.29::gentoo sys-apps/baselayout: 2.2::gentoo sys-apps/openrc: 0.18.2::gentoo sys-apps/sandbox: 2.9::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r1::gentoo sys-devel/automake: 1.11.6-r1::gentoo, 1.13.4::gentoo, 1.14.1::gentoo, 1.15::gentoo sys-devel/binutils: 2.25.1-r1::gentoo sys-devel/gcc: 4.9.3::gentoo sys-devel/gcc-config: 1.8::gentoo sys-devel/libtool: 2.4.6-r1::gentoo sys-devel/make: 4.1-r1::gentoo sys-kernel/linux-headers: 4.2::gentoo (virtual/os-headers) sys-libs/glibc: 2.21-r1::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CC="clang" CFLAGS="-O2 -pipe -march=native" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /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" CXX="clang++" CXXFLAGS="-O2 -pipe -march=native" 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" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="rsync://mirrors.rit.edu/gentoo/" LANG="en_US.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j3" 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="/tmp" USE="X acl alsa amd64 berkdb bindist bzip2 cli cracklib crypt cxx dri emacs flac fortran gdbm iconv ipv6 java mmx mmxext modules multilib multitarget ncurses nls nptl ogg openmp pam pcre readline seccomp session sse sse2 sse3 ssl tcpd theora unicode vorbis xcb xkb zlib" ABI_X86="64 32 x32" 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="mmx mmxext sse sse2 sse3" 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" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en en_US de" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" QEMU_SOFTMMU_TARGETS="x86_64 i386 aarch64 arm armeb" QEMU_USER_TARGETS="x86_64 i386 aarch64 arm armeb" RUBY_TARGETS="ruby20 ruby21" USERLAND="GNU" VIDEO_CARDS="radeon r300" 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, USE_PYTHON
Thanks for reporting. From a cursory research, I haven't found anything upstream in either their git repo, documentation, or bug list that formally states that xml is required for skins to work. With that said, it does seem that skins expect xml. If I can't find anything, I'll submit an upstream bug to confirm it myself, but it does seem that skins may need to depend on xml (i.e. dev-libs/libxml2) to work. Likewise I'll work with a Dev to update the ebuilds.
I confirmed the issue using the steps provided and have submitted an upstream bug suggestion the fix discussed above (i.e. making --enable-skins2 dependent on --enable-libxml2 in configure).
I've confirmed this bug in all versions of VLC currently in Portage. The upstream bug is submitted, but likely won't be backported. So with that in mind, I'd like to have all the Gentoo VLC ebuilds updated as follows: Replace: skins? ( truetype X ^^ ( qt4 qt5 ) ) With: skins? ( truetype X xml ^^ ( qt4 qt5 ) ) As I'm only a proxy-maint and not a developer, I'll work with folks in @gentoo-proxy-maint to make the change.
Created attachment 415674 [details, diff] vlc-2.2.1-r1_skins_xml.patch Patch to add REQUIRED_USE to the 2.2.1-r1 ebuild
Author: Amy Winston <amynka@gentoo.org> Date: Thu Oct 29 08:03:25 2015 +0100 media-video/vlc: use for vdpau and skins changed bug #556860 and #563398. By sdnick484.
