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Bug 549030 - media-video/mpv-0.9.1 doesn't install binary file
Summary: media-video/mpv-0.9.1 doesn't install binary file
Status: RESOLVED INVALID
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Ben de Groot (RETIRED)
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-05-09 21:25 UTC by Patrizio Bassi
Modified: 2015-05-10 23:10 UTC (History)
4 users (show)

See Also:
Package list:
Runtime testing required: ---


Attachments
build.log (build.log,390.34 KB, text/x-log)
2015-05-10 06:42 UTC, Patrizio Bassi
Details

Note You need to log in before you can comment on or make changes to this bug.
Description Patrizio Bassi 2015-05-09 21:25:55 UTC
equery files mpv
 * Searching for mpv ...                                                                                                                                                                
 * Contents of media-video/mpv-0.9.1:                                                                                                                                                   
/usr                                                                                                                                                                                    
/usr/include                                                                                                                                                                            
/usr/include/mpv                                                                                                                                                                        
/usr/include/mpv/client.h                                                                                                                                                               
/usr/include/mpv/opengl_cb.h                                                                                                                                                            
/usr/include/mpv/qthelper.hpp                                                                                                                                                           
/usr/lib64                                                                                                                                                                              
/usr/lib64/libmpv.so -> libmpv.so.1.16.0                                                                                                                                                
/usr/lib64/libmpv.so.1 -> libmpv.so.1.16.0                                                                                                                                              
/usr/lib64/libmpv.so.1.16.0                                                                                                                                                             
/usr/lib64/pkgconfig                                                                                                                                                                    
/usr/lib64/pkgconfig/mpv.pc                                                                                                                                                             
/usr/share                                                                                                                                                                              
/usr/share/doc                                                                                                                                                                          
/usr/share/doc/mpv-0.9.1                                                                                                                                                                
/usr/share/doc/mpv-0.9.1/README.md.bz2                                                                                                                                                  
/usr/share/doc/mpv-0.9.1/RELEASE_NOTES.bz2
/usr/share/doc/mpv-0.9.1/example.conf.bz2
/usr/share/doc/mpv-0.9.1/input.conf.bz2


Portage 2.2.18 (python 2.7.5-final-0, default/linux/amd64/13.0/desktop/kde/systemd, gcc-4.8.1, glibc-2.17, 4.0.0 x86_64)
=================================================================
System uname: Linux-4.0.0-x86_64-Intel-R-_Core-TM-2_CPU_6300_@_1.86GHz-with-gentoo-2.2
KiB Mem:     4046812 total,    457012 free
KiB Swap:    4942532 total,   4936844 free
Timestamp of repository gentoo: Fri, 08 May 2015 18:15:01 +0000
sh bash 4.3_p33-r2
ld ld di GNU (Gentoo 2.25 p1.1) 2.25
ccache version 3.1.9 [disabled]
app-shells/bash:          4.3_p33-r2::gentoo
dev-java/java-config:     2.2.0::gentoo
dev-lang/perl:            5.16.3::gentoo
dev-lang/python:          2.7.5-r4::gentoo, 3.2.5-r1::gentoo, 3.3.5::gentoo
dev-util/ccache:          3.1.9::gentoo
dev-util/cmake:           3.2.1::gentoo
dev-util/pkgconfig:       0.28-r2::gentoo
sys-apps/baselayout:      2.2::gentoo
sys-apps/openrc:          0.13.11::gentoo
sys-apps/sandbox:         2.6-r1::gentoo
sys-devel/autoconf:       2.13::<unknown repository>, 2.69::gentoo
sys-devel/automake:       1.9.6-r3::gentoo, 1.11.6::gentoo, 1.12.6::gentoo, 1.13.1::gentoo, 1.14::gentoo
sys-devel/binutils:       2.25::gentoo
sys-devel/gcc:            4.8.1::gentoo
sys-devel/gcc-config:     1.8::gentoo
sys-devel/libtool:        2.4.2::gentoo
sys-devel/make:           4.1-r1::gentoo
sys-kernel/linux-headers: 4.0::gentoo (virtual/os-headers)
sys-libs/glibc:           2.17::gentoo
Repositories:

gentoo
    location: /mnt/Portage/Gentoo/portage
    sync-type: rsync
    sync-uri: rsync://rsync.europe.gentoo.org/gentoo-portage
    priority: -1000

blight
    location: /mnt/Portage/Gentoo/localportage
    masters: gentoo
    priority: 0

Installed sets: @system
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA skype-4.0.0.7-copyright googleearth AdobeFlash-11.x PUEL"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -mtune=core2 -march=core2 -fomit-frame-pointer -mmmx -msse -msse2 -msse3 -mfpmath=sse"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /etc/mail/dspam /usr/lib/mozilla/defaults/pref /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/themes/oxygen-gtk/gtk-2.0 /var/lib/hsqldb /var/run/dspam"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/eselect/compiler /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.5/ext-active/ /etc/php/cgi-php5.5/ext-active/ /etc/php/cli-php5.5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -pipe -mtune=core2 -march=core2 -fomit-frame-pointer -mmmx -msse -msse2 -msse3 -mfpmath=sse"
DISTDIR="/mnt/Portage/Gentoo/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync metadata-transfer 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="http://distfiles.gentoo.org"
LANG="39"
LC_ALL="it_IT.utf8"
LDFLAGS="-Wl,-O1 -Wl,--sort-common -Wl,--enable-new-dtags -Wl,--as-needed -Wl,--hash-style=gnu"
MAKEOPTS="-j3"
PKGDIR="/mnt/Portage/Gentoo/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="/mnt/Portage/Gentoo/tmp/"
USE="X a52 aac acl acpi alsa amd64 apache2 apng bash-completion branding bzip2 cairo caps cdda cdr connectionstatus cracklib crypt css cups curl cxx daemon dbus declarative device-mapper disable-watermark divx dri dtmf dts dvd dvdr dvdread dynamicplugin embedded encode exif ffmpeg firefox flac ftp g3dvl gallium gbm gif glamor gles gles1 gles2 glibc-omitfp glitz glut gpm hddtemp iconv icu idn ipod ipv6 irc java java6 javascript jpeg jpeg2k justify kde kde4 kdehiddenvisibility kipi kpathsea kqemu lame lcms libkms libmpv lightning lilo lm_sensors lzo mad matroska mime minizip mmx mmxext mng mozdevelop mp3 mp4 mp4live mpeg mpeg2 mplayer msn multilib musepack ncurses network nls nntp npp nptl nsplugin ntfs ogg opengl openmp openssl openvg opus pam pango pdf pdfimport pgo phonon plasma png policykit python3 qt3support qt4 quicktime readline reiserfs remote rtc samba scanner sdl secure-delete semantic-desktop session sip sipim slang smp sockets speex spell sse sse2 sse3 ssl ssse3 svg system-sqlite systemd tao theora threads tiff truetype udev udisks unicode unlock-notify upower usb userlocales v4l vaapi vdpau video vorbis vpx wav wavpack webgl webm webp wifi wma wxwidgets x264 x265 xa xcb xcomposite xine xml xorg xpm xulrunner xv xvfb xvid xvmc zip zlib" ABI_X86="64" ALSA_CARDS="hda-intel" 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 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" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="it" 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="radeon" 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, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
Comment 1 Rafał Mużyło 2015-05-09 23:04:26 UTC
> LANG="39"

...honestly ?


Anyway, the minimum needed here is full build log...

Though I already expect a user error.
Comment 2 Patrizio Bassi 2015-05-10 06:42:30 UTC
Created attachment 402926 [details]
build.log
Comment 3 Patrizio Bassi 2015-05-10 06:52:19 UTC
i fixed the LANG variable, very strange, something went wrong during to systemd migration (39 is the IT code infact).

Regarding extra infos, i'm very sorry, i was posting and accidentally submitted the bug, i didn't want to spam more.

Actually i'm getting portage updated with no issues at all, only mpv is showing this issue.

I tried 0.8.10 version and it shows exactly same issue.

The 0.3.10 version fails to build the "mpv" target instead with this log:

[ 60/227] c: stream/audio_in.c -> build/stream/audio_in.c.10.o
08:46:13 runner ['x86_64-pc-linux-gnu-gcc', '-O2', '-pipe', '-mtune=core2', '-march=core2', '-fomit-frame-pointer', '-mmmx', '-msse', '-msse2', '-msse3', '-mfpmath=sse',
'-D_ISOC99_SOURCE', '-D_GNU_SOURCE', '-D_LARGEFILE_SOURCE', '-D_FILE_OFFSET_BITS=64', '-D_LARGEFILE64_SOURCE', '-std=c99', '-Wall', '-Wundef', '-Wmissing-prototypes',
'-Wno-switch', '-Wno-parentheses', '-Wpointer-arith', '-Wredundant-decls', '-Wno-pointer-sign', '-Werror=implicit-function-declaration', '-Wno-error=deprecated-declarations',
'-Wno-error=unused-function', '-DNO_BUILD_TIMESTAMPS', '-pthread', '-I/mnt/Portage/Gentoo/tmp/portage/media-video/mpv-0.3.10/work/mpv-0.3.10/build',
'-I/mnt/Portage/Gentoo/tmp/portage/media-video/mpv-0.3.10/work/mpv-0.3.10', '-I/usr/include/quvi-0.9', '-I/usr/include/alsa', '-I/usr/include/SDL2', '-I/usr/include/harfbuzz',
'-I/usr/include/freetype2', '-I/usr/include/fribidi', '-I/usr/include/glib-2.0', '-I/usr/lib64/glib-2.0/include', '-I/usr/include/luajit-2.0', '-D_REENTRANT',
'../stream/audio_in.c', '-c', '-o', 'stream/audio_in.c.10.o']
../demux/demux.c:48:2: error: #error MP_INPUT_BUFFER_PADDING_SIZE is too small!
 #error MP_INPUT_BUFFER_PADDING_SIZE is too small!
  ^
Waf: Leaving directory `/mnt/Portage/Gentoo/tmp/portage/media-video/mpv-0.3.10/work/mpv-0.3.10/build'
Build failed
 -> task in 'mpv' failed (exit status 1):
        {task 42906960: c demux.c -> demux.c.10.o}
['x86_64-pc-linux-gnu-gcc', '-O2', '-pipe', '-mtune=core2', '-march=core2', '-fomit-frame-pointer', '-mmmx', '-msse', '-msse2', '-msse3', '-mfpmath=sse', '-D_ISOC99_SOURCE',
'-D_GNU_SOURCE', '-D_LARGEFILE_SOURCE', '-D_FILE_OFFSET_BITS=64', '-D_LARGEFILE64_SOURCE', '-std=c99', '-Wall', '-Wundef', '-Wmissing-prototypes', '-Wno-switch',
'-Wno-parentheses', '-Wpointer-arith', '-Wredundant-decls', '-Wno-pointer-sign', '-Werror=implicit-function-declaration', '-Wno-error=deprecated-declarations',
'-Wno-error=unused-function', '-DNO_BUILD_TIMESTAMPS', '-pthread', '-I/mnt/Portage/Gentoo/tmp/portage/media-video/mpv-0.3.10/work/mpv-0.3.10/build',
'-I/mnt/Portage/Gentoo/tmp/portage/media-video/mpv-0.3.10/work/mpv-0.3.10', '-I/usr/include/quvi-0.9', '-I/usr/include/alsa', '-I/usr/include/SDL2', '-I/usr/include/harfbuzz',
'-I/usr/include/freetype2', '-I/usr/include/fribidi', '-I/usr/include/glib-2.0', '-I/usr/lib64/glib-2.0/include', '-I/usr/include/luajit-2.0', '-D_REENTRANT',
'../demux/demux.c', '-c', '-o', 'demux/demux.c.10.o']





Portage 2.2.18 (python 2.7.5-final-0, default/linux/amd64/13.0/desktop/kde/systemd, gcc-4.8.1, glibc-2.17, 4.0.0 x86_64)
=================================================================
System uname: Linux-4.0.0-x86_64-Intel-R-_Core-TM-2_CPU_6300_@_1.86GHz-with-gentoo-2.2
KiB Mem:     4046812 total,    799424 free
KiB Swap:    4942532 total,   4726684 free
Timestamp of repository gentoo: Fri, 08 May 2015 18:15:01 +0000
sh bash 4.3_p33-r2
ld ld di GNU (Gentoo 2.25 p1.1) 2.25
ccache version 3.1.9 [disabled]
app-shells/bash:          4.3_p33-r2::gentoo
dev-java/java-config:     2.2.0::gentoo
dev-lang/perl:            5.16.3::gentoo
dev-lang/python:          2.7.5-r4::gentoo, 3.2.5-r1::gentoo, 3.3.5::gentoo
dev-util/ccache:          3.1.9::gentoo
dev-util/cmake:           3.2.1::gentoo
dev-util/pkgconfig:       0.28-r2::gentoo
sys-apps/baselayout:      2.2::gentoo
sys-apps/openrc:          0.13.11::gentoo
sys-apps/sandbox:         2.6-r1::gentoo
sys-devel/autoconf:       2.13::<unknown repository>, 2.69::gentoo
sys-devel/automake:       1.9.6-r3::gentoo, 1.11.6::gentoo, 1.12.6::gentoo, 1.13.1::gentoo, 1.14::gentoo
sys-devel/binutils:       2.25::gentoo
sys-devel/gcc:            4.8.1::gentoo
sys-devel/gcc-config:     1.8::gentoo
sys-devel/libtool:        2.4.2::gentoo
sys-devel/make:           4.1-r1::gentoo
sys-kernel/linux-headers: 4.0::gentoo (virtual/os-headers)
sys-libs/glibc:           2.17::gentoo
Repositories:

gentoo
    location: /mnt/Portage/Gentoo/portage
    sync-type: rsync
    sync-uri: rsync://rsync.europe.gentoo.org/gentoo-portage
    priority: -1000

blight
    location: /mnt/Portage/Gentoo/localportage
    masters: gentoo
    priority: 0

Installed sets: @system
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA skype-4.0.0.7-copyright googleearth AdobeFlash-11.x PUEL"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -mtune=core2 -march=core2 -fomit-frame-pointer -mmmx -msse -msse2 -msse3 -mfpmath=sse"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /etc/mail/dspam /usr/lib/mozilla/defaults/pref /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/themes/oxygen-gtk/gtk-2.0 /var/lib/hsqldb /var/run/dspam"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/eselect/compiler /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.5/ext-active/ /etc/php/cgi-php5.5/ext-active/ /etc/php/cli-php5.5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -pipe -mtune=core2 -march=core2 -fomit-frame-pointer -mmmx -msse -msse2 -msse3 -mfpmath=sse"
DISTDIR="/mnt/Portage/Gentoo/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync metadata-transfer 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="http://distfiles.gentoo.org"
LANG="it_IT.utf8"
LC_ALL="it_IT.utf8"
LDFLAGS="-Wl,-O1 -Wl,--sort-common -Wl,--enable-new-dtags -Wl,--as-needed -Wl,--hash-style=gnu"
MAKEOPTS="-j3"
PKGDIR="/mnt/Portage/Gentoo/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="/mnt/Portage/Gentoo/tmp/"
USE="X a52 aac acl acpi alsa amd64 apache2 apng bash-completion branding bzip2 cairo caps cdda cdr connectionstatus cracklib crypt css cups curl cxx daemon dbus declarative device-mapper disable-watermark divx dri dtmf dts dvd dvdr dvdread dynamicplugin embedded encode exif ffmpeg firefox flac ftp g3dvl gallium gbm gif glamor gles gles1 gles2 glibc-omitfp glitz glut gpm hddtemp iconv icu idn ipod ipv6 irc java java6 javascript jpeg jpeg2k justify kde kde4 kdehiddenvisibility kipi kpathsea kqemu lame lcms libkms libmpv lightning lilo lm_sensors lzo mad matroska mime minizip mmx mmxext mng mozdevelop mp3 mp4 mp4live mpeg mpeg2 mplayer msn multilib musepack ncurses network nls nntp npp nptl nsplugin ntfs ogg opengl openmp openssl openvg opus pam pango pdf pdfimport pgo phonon plasma png policykit python3 qt3support qt4 quicktime readline reiserfs remote rtc samba scanner sdl secure-delete semantic-desktop session sip sipim slang smp sockets speex spell sse sse2 sse3 ssl ssse3 svg system-sqlite systemd tao theora threads tiff truetype udev udisks unicode unlock-notify upower usb userlocales v4l vaapi vdpau video vorbis vpx wav wavpack webgl webm webp wifi wma wxwidgets x264 x265 xa xcb xcomposite xine xml xorg xpm xulrunner xv xvfb xvid xvmc zip zlib" ABI_X86="64" ALSA_CARDS="hda-intel" 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 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" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="it" 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="radeon" 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, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
Comment 4 Rafał Mużyło 2015-05-10 09:23:06 UTC
...unrelated, but why are you setting LC_ALL in the first place ?

OK, don't know much about this package, but '+cli' in the ebuild strongly suggests, that you shouldn't have unset it.

Also, the failure of the older version is (in a way) well known and expected - that error simply means "incompatible with the recent versions of ffmpeg/libav".
Comment 5 Nikoli 2015-05-10 18:54:45 UTC
build.log has '--disable-cplayer', do not disable USE cli.

P.S. May be we should add ewarn to ebuild when it is disabled?
Comment 6 Ben de Groot (RETIRED) gentoo-dev 2015-05-10 23:10:58 UTC
(In reply to Nikoli from comment #5)
> build.log has '--disable-cplayer', do not disable USE cli.
> 
> P.S. May be we should add ewarn to ebuild when it is disabled?

I don't think that is necessary. We already have:

IUSE="+cli libmpv"
REQUIRED_USE=" || ( cli libmpv )"

and a good useflag description.

When the user disables the cli useflag and simultaneously enables the libmpv useflag (as at least one of them is required by REQUIRED_USE), then I think it is reasonable to assume that is being done on purpose.