--- portage/eclass/toolchain.eclass.orig	2007-03-22 16:59:15.000000000 +0000
+++ portage/eclass/toolchain.eclass.orig	2007-03-22 16:37:57.000000000 +0000
@@ -2344,7 +2344,7 @@ 
 
 is_cxx() {
 	gcc-lang-supported 'c++' || return 1
-	use build && return 1
+	use build && return 0
 	! use nocxx
 }