1softmmu_ss.add(when: ['CONFIG_XEN', xen], if_true: files( 2 'xen-backend.c', 3 'xen-bus-helper.c', 4 'xen-bus.c', 5 'xen-legacy-backend.c', 6 'xen_devconfig.c', 7 'xen_pvdev.c', 8)) 9 10xen_specific_ss = ss.source_set() 11xen_specific_ss.add(when: 'CONFIG_XEN_PCI_PASSTHROUGH', if_true: files( 12 'xen-host-pci-device.c', 13 'xen_pt.c', 14 'xen_pt_config_init.c', 15 'xen_pt_graphics.c', 16 'xen_pt_load_rom.c', 17 'xen_pt_msi.c', 18), if_false: files('xen_pt_stub.c')) 19 20specific_ss.add_all(when: ['CONFIG_XEN', xen], if_true: xen_specific_ss) 21