diff -up dx-4.4.4/configure.ac.r dx-4.4.4/configure.ac
--- dx-4.4.4/configure.ac.r	2006-08-21 23:56:08.000000000 +0200
+++ dx-4.4.4/configure.ac	2009-01-27 00:16:18.000000000 +0100
@@ -218,6 +218,7 @@ AC_DEFINE_UNQUOTED(BSH, "$bsh_path", [Pa
 dnl End of command line options configuration
 
 dnl Start DX configuration
+AC_PROG_CXX
 AC_LANG([C++])
 AC_CHECK_HEADERS(stdlib.h)
 AC_LANG([C])