--- gforth-0.7.0/envos.fs.in~   2008-09-18 21:02:21.000000000 +0100
+++ gforth-0.7.0/envos.fs.in    2012-04-18 11:22:30.916075000 +0100
@@ -32,7 +32,7 @@

 : libtool-cc ( -- c-addr u ) \ gforth
 \G invocation string of the C compiler used for libtool
-    s" @CC@" ;
+    s" --tag=CXX @CC@ " ;

 : libtool-flags ( -- c-addr u ) \ gforth
 \G force no undefined for cygwin