diff --git a/CMakeLists.txt b/CMakeLists.txt
index 00ef16d..97352e3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,9 @@ project(
   LANGUAGES CXX
 )
 
+message(WARNING "CMAKE_CXX_COMPILER_ID ${CMAKE_CXX_COMPILER_ID}")
+message(WARNING "CMAKE_CXX_SIMULATE_ID ${CMAKE_CXX_SIMULATE_ID}")
+
 option(MY_FIBONACCI_ENABLE_TESTS "Enable test targets.")
 option(MY_FIBONACCI_ENABLE_INSTALL "Enable install targets."
   "${PROJECT_IS_TOP_LEVEL}")