invoke.texi (ms-extension): Add documentation.

2010-08-17  Kai Tietz  <kai.tietz@onevision.com>

        * doc/invoke.texi (ms-extension): Add documentation.

From-SVN: r163301

gcc/ChangeLog

+2010-08-17  Kai Tietz  <kai.tietz@onevision.com>
+
+	* doc/invoke.texi (ms-extension): Add documentation.
+
 2010-08-17  Richard Guenther  <rguenther@suse.de>
 
 	* fold-const.c (fold_comparison): Strip nops inside

gcc/doc/invoke.texi

@@ -1685,6 +1685,16 @@ have support for @option{-pthread}.
 @opindex fms-extensions
 Accept some non-standard constructs used in Microsoft header files.
 
+It allows for c++ that member-names in structures can be similiar
+to previous types declarations.
+
+@smallexample
+typedef int UOW;
+struct ABC @{
+  UOW UOW;
+@};
+@end smallexample
+
 Some cases of unnamed fields in structures and unions are only
 accepted with this option.  @xref{Unnamed Fields,,Unnamed struct/union
 fields within structs/unions}, for details.