Warn about broken interface layout
git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/trunk@3336 4407c894-4637-0410-b4f5-ada5f102cad1
diff --git a/mingw-w64-headers/include/propsys.h b/mingw-w64-headers/include/propsys.h
index ff1ca98..9427fde 100644
--- a/mingw-w64-headers/include/propsys.h
+++ b/mingw-w64-headers/include/propsys.h
@@ -10,6 +10,11 @@
#undef INTERFACE
#define INTERFACE IPropertyStore
+#ifdef __GNUC__
+#warning COM interfaces layout in this header has not been verified.
+#warning COM interfaces with incorrect layout may not work at all.
+__MINGW_BROKEN_INTERFACE(INTERFACE)
+#endif
DECLARE_INTERFACE_(IPropertyStore,IUnknown)
{
BEGIN_INTERFACE
@@ -41,6 +46,11 @@
#undef INTERFACE
#define INTERFACE INamedPropertyStore
+#ifdef __GNUC__
+#warning COM interfaces layout in this header has not been verified.
+#warning COM interfaces with incorrect layout may not work at all.
+__MINGW_BROKEN_INTERFACE(INTERFACE)
+#endif
DECLARE_INTERFACE_(INamedPropertyStore,IUnknown)
{
BEGIN_INTERFACE
