--- CMakeLists.txt.orig	2021-01-01 06:23:17 UTC
+++ CMakeLists.txt
@@ -27,7 +27,11 @@ set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -D
 
 enable_testing()
 
-add_subdirectory(example)
-add_subdirectory(test)
+if (BUILD_EXAMPLES)
+	add_subdirectory(example)
+endif()
+if (BUILD_TESTS)
+	add_subdirectory(test)
+endif()
 
 exec_program( ${CMAKE_COMMAND} ARGS -E copy_directory ${PROJECT_SOURCE_DIR}/data ${PROJECT_BINARY_DIR}/data )