VLC 2.2.x Seems to Require VDPAU to be Disabled if XCB is Disabled
Within Gentoo we've noticed that as of VLC 2.2.0 (and still present in 2.2.1 & latest GIT), it seems that if you set --disable-xcb then you also need to --disable-vdpau. Setting --disable-xcb and --enable-vdpau will allow you to attempt a build however it ends up failing with: make[5]: *** No rule to make target '../../video_output/libvlc_xcb_events.la', needed by 'libvdpau_display_plugin.la'. Stop.
Previously with VLC 2.1.5, you could disable xcb but still build with vdpau enabled. I'm trying to understand if we need to make xcb a USE flag depdency for the vdpau USE flag.
A build.log is attached (apologies if I'm missing anything, this is my first upstream bug report).