Cmake: Set default build type to release

CMakeLists.txt

@@ -6,6 +6,19 @@ endif()
 
 project(lcm)
 
+# https://www.kitware.com/cmake-and-the-default-build-type/
+# Set a default build type if none was specified
+set(default_build_type "Release")
+
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+ message(STATUS "Setting build type to '${default_build_type}' as none was specified.")
+ set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE
+ STRING "Choose the type of build." FORCE)
+ # Set the possible values of build type for cmake-gui
+ set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+ "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
+endif()
+
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 if(CMAKE_VERSION VERSION_LESS 3.7)
  list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/3.7")