diff --git a/.gitattributes b/.gitattributes
index 1a4dc6854a..07d10138a1 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -93,6 +93,7 @@ compiler/comprsrc.pas svneol=native#text/plain
 compiler/cp437.pas svneol=native#text/plain
 compiler/cp850.pas svneol=native#text/plain
 compiler/cp8859_1.pas svneol=native#text/plain
+compiler/crefs.pas -text
 compiler/cresstr.pas svneol=native#text/plain
 compiler/cstreams.pas svneol=native#text/plain
 compiler/cutils.pas svneol=native#text/plain
diff --git a/compiler/crefs.pas b/compiler/crefs.pas
new file mode 100644
index 0000000000..52381b6f88
--- /dev/null
+++ b/compiler/crefs.pas
@@ -0,0 +1,65 @@
+{
+    Copyright (c) 2007 by Pierre Muller
+
+    Common reference types
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ ****************************************************************************
+}
+
+unit crefs;
+
+{$i fpcdefs.inc}
+
+interface
+
+uses
+  globals,
+  cclasses;
+
+  type
+
+   TrefItem = class (TLinkedListItem)
+     refinfo  : tfileposinfo;
+     constructor create(const ARefInfo : tfileposinfo);
+     Function GetCopy:TLinkedListItem;virtual;
+   end;
+
+   TRefLinkedList = class(TLinkedList)
+     procedure WriteToPPU;
+   end;
+
+implementation
+
+constructor TRefItem.Create(const ARefInfo : tfileposinfo);
+begin
+  Inherited Create;
+  RefInfo:=ARefInfo;
+end;
+
+Function TRefItem.GetCopy : TLinkedListItem;
+var
+  NR : TRefItem;
+begin
+  NR.Create(RefInfo);
+  GetCopy:=NR;
+end;
+
+procedure TRefLinkedList.WriteToPPU;
+begin
+end;
+
+begin
+end.