qemu Enables support for Linux's Async IO Enable alsa output for sound emulation Adds support for braille displays using brltty Enable esound output for sound emulation Enables firmware device tree support Enable JPEG compression for the VNC console server Enable the ncurses-based console Build support for Smartcard devices emulation using dev-libs/nss Enable PNG compression for the VNC console server Enable pulseaudio output for sound emulation Provides the qemu-ifup script for use with QEMU's built in bridging Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD Enable the SDL-based console Enable Spice protocol support via app-emulation/spice Enable TLS support for the VNC console server Enable VDE-based networking Enable accelerated networking using vhost-net, see http://www.linux-kvm.org/page/VhostNet Enables support for Xen backends