1mem_ss = ss.source_set() 2mem_ss.add(files('memory-device.c')) 3mem_ss.add(when: 'CONFIG_DIMM', if_true: files('pc-dimm.c')) 4mem_ss.add(when: 'CONFIG_NPCM7XX', if_true: files('npcm7xx_mc.c')) 5mem_ss.add(when: 'CONFIG_NVDIMM', if_true: files('nvdimm.c')) 6mem_ss.add(when: 'CONFIG_CXL_MEM_DEVICE', if_true: files('cxl_type3.c')) 7system_ss.add(when: 'CONFIG_CXL_MEM_DEVICE', if_false: files('cxl_type3_stubs.c')) 8 9system_ss.add_all(when: 'CONFIG_MEM_DEVICE', if_true: mem_ss) 10 11system_ss.add(when: 'CONFIG_SPARSE_MEM', if_true: files('sparse-mem.c')) 12