merged borland 6+ support from trunk.

[SVN r49190]

test/cloning_test.cpp

@@ -7,8 +7,13 @@
 #include <boost/exception/get_error_info.hpp>
 #include <boost/exception/info.hpp>
 #include <boost/detail/lightweight_test.hpp>
+#include <boost/detail/workaround.hpp>
 #include <string>
 
+#if BOOST_WORKAROUND(__CODEGEARC__, BOOST_TESTED_AT(0x610))
+struct my_tag {};
+#endif
+
 typedef boost::error_info<struct my_tag,int> my_info;
 
 template <class T>
@@ -36,8 +41,8 @@ derives_nothing
     int & count;
 
     explicit
-    derives_nothing( int & count ):
-        count(count)
+    derives_nothing( int & c ):
+        count(c)
         {
         ++count;
         }