CMakeLists.txt

cmake_minimum_required(VERSION 3.12)

project(signals LANGUAGES CXX)

if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
    set(IS_TOPLEVEL_PROJECT TRUE)
else()
    set(IS_TOPLEVEL_PROJECT FALSE)
endif()

if(IS_TOPLEVEL_PROJECT)
    enable_testing()
    add_subdirectory(tests)
endif()

include(CMakePackageConfigHelpers)

file(GLOB_RECURSE HEADERFILES ${CMAKE_CURRENT_SOURCE_DIR}/include/signals/*.hpp)

add_library(${PROJECT_NAME} INTERFACE)
add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})

target_sources(${PROJECT_NAME} PRIVATE "$<BUILD_INTERFACE:${HEADERFILES}>")
source_group("cs" ${HEADERFILES})

target_compile_features(${PROJECT_NAME} INTERFACE cxx_std_17)
target_include_directories(${PROJECT_NAME}
        INTERFACE
            $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
            $<INSTALL_INTERFACE:include>)

install(TARGETS ${PROJECT_NAME}
        EXPORT ${PROJECT_NAME}Config)

install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
        DESTINATION lib/cmake/${PROJECT_NAME})

install(EXPORT ${PROJECT_NAME}Config
        NAMESPACE ${PROJECT_NAME}::
        DESTINATION lib/cmake/${PROJECT_NAME})

install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/include
        DESTINATION .)