Fix #508 (#640)

* Fix #508

* Missed warning suppression
diff --git a/examples/all_features/CMakeLists.txt b/examples/all_features/CMakeLists.txt
index 80105c9..86dfc9e 100644
--- a/examples/all_features/CMakeLists.txt
+++ b/examples/all_features/CMakeLists.txt
@@ -9,6 +9,7 @@
     alternative_macros.cpp
     assertion_macros.cpp
     stringification.cpp
+    double_stringification.cpp
     reporters_and_listeners.cpp
     subcases.cpp
     logging.cpp