看贴一下错误的地方
代码: 全选
automoc4: process for /var/tmp/portage/media-libs/phonon-4.6.0-r1/work/phonon-4.6.0_build/designer/moc_videowidgetplugin.cpp failed: Unknown error
pid to wait for: 0
returning failed..
make[2]: *** [designer/CMakeFiles/phononwidgets_automoc] Error 1
make[2]: Leaving directory `/var/tmp/portage/media-libs/phonon-4.6.0-r1/work/phonon-4.6.0_build'
make[1]: *** [designer/CMakeFiles/phononwidgets_automoc.dir/all] Error 2
http://bpaste.net/show/109224/

去gentoo里提交了bug,然后按照大神的提示重新build qtgui之后phonon也可以build了。