diff -u -r1.241 configure.ac
--- configure.ac	22 Apr 2007 09:37:05 -0000	1.241
+++ configure.ac	29 Apr 2007 21:00:56 -0000
@@ -118,12 +118,16 @@
 dnl skip libtool C++ and Fortran compiler checks
 m4_ifdef([AC_PROG_CXX], [m4_undefine([AC_PROG_CXX])])
 m4_defun([AC_PROG_CXX],[])
+m4_ifdef([AC_PROG_CXXCPP], [m4_undefine([AC_PROG_CXXCPP])])
+m4_defun([AC_PROG_CXXCPP],[true])
 m4_ifdef([AC_PROG_F77], [m4_undefine([AC_PROG_F77])])
 m4_defun([AC_PROG_F77],[])
 
 dnl skip libtool C++ and Fortran linker checks
 m4_ifdef([AC_LIBTOOL_CXX], [m4_undefine([AC_LIBTOOL_CXX])])
 m4_defun([AC_LIBTOOL_CXX],[])
+m4_ifdef([AC_LIBTOOL_CXXCPP], [m4_undefine([AC_LIBTOOL_CXXCPP])])
+m4_defun([AC_LIBTOOL_CXXCPP],[true])
 m4_ifdef([AC_LIBTOOL_F77], [m4_undefine([AC_LIBTOOL_F77])])
 m4_defun([AC_LIBTOOL_F77],[])