CMake dependent options

CMakeLists.txt

project(cmake_recipe01 LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 14)

# set(USE_LIBRARY OFF)
option(USE_LIBRARY "Compile sources into a library" OFF)
message(STATUS "Compile sources into a library? ${USE_LIBRARY}")

include(CMakeDependentOption)
cmake_dependent_option(
        MAKE_STATIC_LIBRARY "Compile sources into a static library" OFF
        "USE_LIBRARY" ON
)
cmake_dependent_option(
        MAKE_SHARED_LIBRARY "Compile sources into a shared library" ON
        "USE_LIBRARY" ON
)

# set(BUILD_SHARED_LIBS OFF)
list(APPEND _sources Message.h Message.cpp)

if(USE_LIBRARY)
    message(STATUS "Compile sources into a STATIC library? ${MAKE_STATIC_LIBRARY}")
    message(STATUS "Compile sources into a SHARED library? ${MAKE_SHARED_LIBRARY}")
    if(MAKE_SHARED_LIBRARY)
        add_library(message SHARED ${_sources})
        add_executable(cmake_recipe01 main.cpp)
        target_link_libraries(cmake_recipe01 message)
    endif()
    if(MAKE_STATIC_LIBRARY)
        add_library(message STATIC ${_sources})
        add_executable(cmake_recipe01 main.cpp)
        target_link_libraries(cmake_recipe01 message)
    endif()
else()
    add_executable(cmake_recipe01 main.cpp ${_sources})
endif()