smbios_ss = ss.source_set() smbios_ss.add(files('smbios.c')) smbios_ss.add(when: 'CONFIG_IPMI', if_true: files('smbios_type_38.c'), if_false: files('smbios_type_38-stub.c')) smbios_ss.add(when: 'CONFIG_SMBIOS_LEGACY', if_true: files('smbios_legacy.c'), if_false: files('smbios_legacy_stub.c')) system_ss.add_all(when: 'CONFIG_SMBIOS', if_true: smbios_ss) system_ss.add(when: 'CONFIG_SMBIOS', if_false: files('smbios-stub.c'))