if(CMAKE_C_FLAGS)message(STATUS "CMAKE_C_FLAGS: "${CMAKE_C_FLAGS})else()set(default_build_type "Release")message( STATUS"Setting build type to '${default_build_type}' as none was specified and no CFLAGS was exported.")set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE STRING "Choose the type of build." FORCE)# Set the possible values of build type for cmake-guiset_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS"Debug""Release""MinSizeRel""RelWithDebInfo")endif()