1i386_kvm_ss = ss.source_set() 2i386_kvm_ss.add(files('clock.c')) 3i386_kvm_ss.add(when: 'CONFIG_APIC', if_true: files('apic.c')) 4i386_kvm_ss.add(when: 'CONFIG_I8254', if_true: files('i8254.c')) 5i386_kvm_ss.add(when: 'CONFIG_I8259', if_true: files('i8259.c')) 6i386_kvm_ss.add(when: 'CONFIG_IOAPIC', if_true: files('ioapic.c')) 7i386_kvm_ss.add(when: 'CONFIG_XEN_EMU', if_true: files( 8 'xen_overlay.c', 9 'xen_evtchn.c', 10 'xen_gnttab.c', 11 )) 12 13i386_ss.add_all(when: 'CONFIG_KVM', if_true: i386_kvm_ss) 14 15xen_stubs_ss = ss.source_set() 16xen_stubs_ss.add(when: 'CONFIG_XEN_EMU', if_false: files( 17 'xen-stubs.c', 18)) 19 20specific_ss.add_all(when: 'CONFIG_SOFTMMU', if_true: xen_stubs_ss) 21