have CMake auto-detect new sample apps

Author: DavidLudwig

P0267_RefImpl/Samples/CMakeLists.txt

@@ -1,10 +1,14 @@
 cmake_minimum_required(VERSION 3.0.0)
 project(io2d CXX)
 
-add_subdirectory(draw_cpp)
-add_subdirectory(rocks_in_space)
-add_subdirectory(svg)
-add_subdirectory(life)
-add_subdirectory(cpu_load)
-add_subdirectory(sprites)
-add_subdirectory(maps)
+# Search for and add sample app(s):
+file(GLOB all_paths ${CMAKE_CURRENT_LIST_DIR}/*)
+set(all_samples "")
+foreach(one_path ${all_paths})
+    if(IS_DIRECTORY ${one_path})
+        if(EXISTS ${one_path}/CMakeLists.txt)
+            get_filename_component(one_sample ${one_path} NAME)
+            add_subdirectory(${one_sample})
+        endif()
+    endif()
+endforeach()