diff --git a/include/boost/typeof/typeof.hpp b/include/boost/typeof/typeof.hpp
old mode 100755
new mode 100644
index 165ef95..a9d2fea
--- a/include/boost/typeof/typeof.hpp
+++ b/include/boost/typeof/typeof.hpp
@@ -65,7 +65,7 @@
 #           endif
 #           define BOOST_TYPEOF_KEYWORD __typeof__
 #       else
-#           error typeof emulation is not supported
+#           define BOOST_TYPEOF_EMULATION_UNSUPPORTED
 #       endif
 #   else // 9.x
 #       ifndef BOOST_TYPEOF_EMULATION
@@ -75,7 +75,22 @@
 #           define BOOST_TYPEOF_KEYWORD __typeof__
 #       endif
 #   endif
-
+#elif defined __CODEGEARC__
+#   ifndef BOOST_TYPEOF_EMULATION
+#       ifndef BOOST_TYPEOF_NATIVE
+#           define BOOST_TYPEOF_EMULATION_UNSUPPORTED
+#       endif
+#   else
+#       define BOOST_TYPEOF_EMULATION_UNSUPPORTED
+#   endif
+#elif defined __BORLANDC__
+#   ifndef BOOST_TYPEOF_EMULATION
+#       ifndef BOOST_TYPEOF_NATIVE
+#           define BOOST_TYPEOF_EMULATION_UNSUPPORTED
+#       endif
+#   else
+#       define BOOST_TYPEOF_EMULATION_UNSUPPORTED
+#   endif
 #elif defined __DMC__
 #   ifndef BOOST_TYPEOF_EMULATION
 #       ifndef BOOST_TYPEOF_NATIVE
@@ -163,7 +178,9 @@
 #define BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()\
      <boost/typeof/incr_registration_group.hpp>
 
-#ifdef BOOST_TYPEOF_EMULATION
+#ifdef BOOST_TYPEOF_EMULATION_UNSUPPORTED
+#   include <boost/typeof/unsupported.hpp>
+#elif defined BOOST_TYPEOF_EMULATION
 #   define BOOST_TYPEOF_TEXT "using typeof emulation"
 #   include <boost/typeof/message.hpp>
 #   include <boost/typeof/typeof_impl.hpp>
diff --git a/include/boost/typeof/unsupported.hpp b/include/boost/typeof/unsupported.hpp
new file mode 100644
index 0000000..83d3a55
--- /dev/null
+++ b/include/boost/typeof/unsupported.hpp
@@ -0,0 +1,29 @@
+// Copyright (C) 2010 Peder Holt
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_TYPEOF_UNSUPPORTED_HPP_INCLUDED
+#define BOOST_TYPEOF_UNSUPPORTED_HPP_INCLUDED
+
+namespace boost { namespace type_of {
+    struct typeof_emulation_is_unsupported_on_this_compiler {};
+}}
+
+#define BOOST_TYPEOF(expr) boost::type_of::typeof_emulation_is_unsupported_on_this_compiler
+#define BOOST_TYPEOF_TPL BOOST_TYPEOF
+
+#define BOOST_TYPEOF_NESTED_TYPEDEF_TPL(name,expr) \
+struct name {\
+    typedef BOOST_TYPEOF_TPL(expr) type;\
+};
+
+#define BOOST_TYPEOF_NESTED_TYPEDEF(name,expr) \
+struct name {\
+    typedef BOOST_TYPEOF(expr) type;\
+};
+
+
+#define BOOST_TYPEOF_REGISTER_TYPE(x)
+#define BOOST_TYPEOF_REGISTER_TEMPLATE(x, params)
+
+#endif
\ No newline at end of file