cmake_minimum_required(VERSION 3.0) project(ConfigSources) add_library(iface INTERFACE) set_property(TARGET iface PROPERTY INTERFACE_SOURCES iface_src.cpp $<$<CONFIG:Debug>:iface_debug_src.cpp> $<$<CONFIG:Release>:does_not_exist.cpp> ) add_executable(ConfigSources $<$<CONFIG:Debug>:main.cpp> $<$<CONFIG:Release>:does_not_exist.cpp> ) target_link_libraries(ConfigSources iface)