1specific_ss.add(when: 'CONFIG_HYPERV', if_true: files('hyperv.c')) 2specific_ss.add(when: 'CONFIG_HYPERV_TESTDEV', if_true: files('hyperv_testdev.c')) 3specific_ss.add(when: 'CONFIG_VMBUS', if_true: files('vmbus.c')) 4specific_ss.add(when: 'CONFIG_SYNDBG', if_true: files('syndbg.c')) 5specific_ss.add(when: 'CONFIG_HV_BALLOON', if_true: files('hv-balloon.c', 'hv-balloon-page_range_tree.c', 'hv-balloon-our_range_memslots.c'), if_false: files('hv-balloon-stub.c')) 6