diff --git a/examples/demo1/main/src/main.c b/examples/demo1/main/src/main.c
index 83ad273..182b1ca 100644
--- a/examples/demo1/main/src/main.c
+++ b/examples/demo1/main/src/main.c
@@ -21,7 +21,11 @@
 
 int main()
 {
-    printf("hello\n");
+#if DEBUG
+    printf("!!! DEBUG !!!\n");
+#elif RELEASE
+    printf("!!! RELEASE !!!\n");
+#endif
     test();
     test1();
 #if CONFIG_COMPONENT2_ENABLED
diff --git a/tools/cmake/compile.cmake b/tools/cmake/compile.cmake
index 13b68f3..fc3d1ae 100644
--- a/tools/cmake/compile.cmake
+++ b/tools/cmake/compile.cmake
@@ -380,10 +380,12 @@ macro(project name)
     endif()
 
     # add DEBUG or RELEASE flag globally
-    if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+    if(NOT CMAKE_BUILD_TYPE OR CMAKE_BUILD_TYPE STREQUAL "Debug")
         add_definitions(-DDEBUG=1 -DRELEASE=0)
+        # message("!!! DEBUG !!!")
     else()
         add_definitions(-DRELEASE=1 -DDEBUG=0)
+        # message("!!! RELEASE !!!")
     endif()
 
     # Add dependence: update configfile, append time and git info for global config header file