do tests using c++

diff --git a/configure.in b/configure.in
index 5e699972b7df424e26a36ecb59b841fcce0a4109..9e776f952b13cdb13ba4c546d7440b14f7705871 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -15,6 +15,8 @@ AC_PROG_CC
 AC_PROG_CXX
 AC_PROG_INSTALL
 
+AC_LANG(C++)
+
 AC_CHECK_PROGS(regex_cmd, sed)
 if test x$regex_cmd = "x"; then
   AC_MSG_ERROR([error. sed is required to build the default menu file.])