microjson/CMakeLists.txt

cmake_minimum_required(VERSION 3.6)

project(microjson VERSION 0.1.0 LANGUAGES CXX)

set(TARGET microjson)
set(TARGET_STATIC ${TARGET}Static)
set(TARGET_EXPORT ${TARGET}Targets)
set(TARGET_CONFIG ${TARGET}Config)

include(GNUInstallDirs)

set(TARGET_INCLUDE_DIR ${CMAKE_INSTALL_INCLUDEDIR}/${TARGET})
set(TARGET_LIB_DIR ${CMAKE_INSTALL_LIBDIR})
set(TARGET_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME})
set(TARGET_BINDIR ${CMAKE_INSTALL_BINDIR})

set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

add_library(${TARGET} microjson.cpp)
set_target_properties(${TARGET} PROPERTIES VERSION ${PROJECT_VERSION} PUBLIC_HEADER "microjson.h" OUTPUT_NAME ${TARGET})
target_include_directories(${TARGET} PUBLIC
    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
    $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include/${TARGET}>
    $<INSTALL_INTERFACE:${TARGET_INCLUDE_DIR}>
)

install(TARGETS ${TARGET}
    EXPORT ${TARGET_EXPORT} COMPONENT dev
    ARCHIVE DESTINATION ${TARGET_LIB_DIR} COMPONENT lib
    PUBLIC_HEADER DESTINATION ${TARGET_INCLUDE_DIR} COMPONENT dev
    LIBRARY DESTINATION ${TARGET_LIB_DIR} COMPONENT lib
    RUNTIME DESTINATION ${TARGET_BINDIR} COMPONENT lib)

install(EXPORT ${TARGET_EXPORT} FILE ${TARGET_EXPORT}.cmake DESTINATION ${TARGET_CMAKE_DIR} COMPONENT dev)

include(CMakePackageConfigHelpers)
configure_package_config_file(
    "${TARGET_CONFIG}.cmake.in" "${CMAKE_CURRENT_BINARY_DIR}/${TARGET_CONFIG}.cmake"
    INSTALL_DESTINATION "${TARGET_CMAKE_DIR}")

install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${TARGET_CONFIG}.cmake" DESTINATION "${TARGET_CMAKE_DIR}" COMPONENT dev)

export(PACKAGE ${TARGET})
export(TARGETS ${TARGET} FILE ${TARGET_EXPORT}.cmake)

if(DEFINED $ENV{MICROJSON_MAKE_TESTS})
    set(MICROJSON_MAKE_TESTS $ENV{MICROJSON_MAKE_TESTS})
elseif(NOT DEFINED MICROJSON_MAKE_TESTS)
    set(MICROJSON_MAKE_TESTS ON)
endif()

if(MICROJSON_MAKE_TESTS)
    find_package(GTest)
    if(GTest_FOUND)
        enable_testing()
        add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/tests")
    else()
        message(STATUS "Force disable test")
    endif()
endif()