if(NOT DEFINED VERSION_MAJOR)
    message(WARNING "version.cmake | No VERSION_MAJOR variable passed. Setting to 0")
    set(VERSION_MAJOR 0)
endif()
if(NOT DEFINED VERSION_MINOR)
    message(WARNING "version.cmake | No VERSION_MINOR variable passed. Setting to 0")
    set(VERSION_MINOR 0)
endif()
if(NOT DEFINED VERSION_REVISION)
    message(WARNING "version.cmake | No VERSION_REVISION variable passed. Setting to 0")
    set(VERSION_REVISION 0)
endif()
if(NOT DEFINED VERSION_VCS_INFO)
    set(VERSION_VCS_INFO "")
endif()

set(VERSION_TO_SET "#include \"version.h\"

namespace fsfw {

const int FSFW_VERSION_MAJOR = ${VERSION_MAJOR};
const int FSFW_VERSION_MINOR = ${VERSION_MINOR};
const int FSFW_VERSION_REVISION = ${VERSION_MINOR};
const char FSFW_VCS_INFO[] = \"${VERSION_VCS_INFO}\";

};
")

if(EXISTS ${VERSION_DIR}/versionAutogen.cpp)
    file(READ ${VERSION_DIR}/versionAutogen.cpp OLD_VERSION)
else()
    set(OLD_VERSION "")
endif()

if (NOT "${VERSION_TO_SET}" STREQUAL "${OLD_VERSION}")
    message(STATUS "Updating versionAutogen.cpp file")
    file(WRITE ${VERSION_DIR}/versionAutogen.cpp "${VERSION_TO_SET}")
endif()