|  | acpi_ss = ss.source_set() | 
|  | acpi_ss.add(files( | 
|  | 'acpi_interface.c', | 
|  | 'aml-build.c', | 
|  | 'bios-linker-loader.c', | 
|  | 'core.c', | 
|  | 'utils.c', | 
|  | )) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_CPU_HOTPLUG', if_true: files('cpu.c', 'cpu_hotplug.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_CPU_HOTPLUG', if_false: files('acpi-cpu-hotplug-stub.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_MEMORY_HOTPLUG', if_true: files('memory_hotplug.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_MEMORY_HOTPLUG', if_false: files('acpi-mem-hotplug-stub.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_NVDIMM', if_true: files('nvdimm.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_NVDIMM', if_false: files('acpi-nvdimm-stub.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_PCI', if_true: files('pci.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_CXL', if_true: files('cxl.c'), if_false: files('cxl-stub.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_VMGENID', if_true: files('vmgenid.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_HW_REDUCED', if_true: files('generic_event_device.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_HMAT', if_true: files('hmat.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_APEI', if_true: files('ghes.c'), if_false: files('ghes-stub.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_PIIX4', if_true: files('piix4.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_PCI_BRIDGE', if_true: files('pci-bridge.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_PCIHP', if_true: files('pcihp.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_PCIHP', if_false: files('acpi-pci-hotplug-stub.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_VIOT', if_true: files('viot.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_ICH9', if_true: files('ich9.c', 'ich9_tco.c')) | 
|  | acpi_ss.add(when: 'CONFIG_ACPI_ERST', if_true: files('erst.c')) | 
|  | acpi_ss.add(when: 'CONFIG_IPMI', if_true: files('ipmi.c'), if_false: files('ipmi-stub.c')) | 
|  | acpi_ss.add(when: 'CONFIG_PC', if_false: files('acpi-x86-stub.c')) | 
|  | if have_tpm | 
|  | acpi_ss.add(files('tpm.c')) | 
|  | endif | 
|  | system_ss.add(when: 'CONFIG_ACPI', if_false: files('acpi-stub.c', 'aml-build-stub.c', 'ghes-stub.c', 'acpi_interface.c')) | 
|  | system_ss.add(when: 'CONFIG_ACPI_PCI_BRIDGE', if_false: files('pci-bridge-stub.c')) | 
|  | system_ss.add_all(when: 'CONFIG_ACPI', if_true: acpi_ss) | 
|  | system_ss.add(when: 'CONFIG_ALL', if_true: files('acpi-stub.c', 'aml-build-stub.c', | 
|  | 'acpi-x86-stub.c', 'ipmi-stub.c', 'ghes-stub.c', | 
|  | 'acpi-mem-hotplug-stub.c', 'acpi-cpu-hotplug-stub.c', | 
|  | 'acpi-pci-hotplug-stub.c', 'acpi-nvdimm-stub.c', | 
|  | 'cxl-stub.c', 'pci-bridge-stub.c')) | 
|  | system_ss.add(files('acpi-qmp-cmds.c')) |