hw/block/dataplane/meson.build - qemu - Git at Google

 specific_ss.add(when: 'CONFIG_VIRTIO_BLK', if_true: files('virtio-blk.c'))
 specific_ss.add(when: 'CONFIG_XEN', if_true: files('xen-block.c'))
	specific_ss.add(when: 'CONFIG_VIRTIO_BLK', if_true: files('virtio-blk.c'))
	specific_ss.add(when: 'CONFIG_XEN', if_true: files('xen-block.c'))