cmake_minimum_required(VERSION 3.1.0) project(sending_arguments) set(CMAKE_AUTOMOC ON) # SingleApplication base class set(QAPPLICATION_CLASS QCoreApplication CACHE STRING "Inheritance class for SingleApplication") add_executable(${PROJECT_NAME} main.cpp messagereceiver.cpp messagereceiver.h main.cpp ) find_package(Qt5 COMPONENTS Core REQUIRED) add_subdirectory(../.. SingleApplication) target_link_libraries(${PROJECT_NAME} Qt5::Core SingleApplication)