There is a problem with the way autoconf 2.50 (as well as current CVS HEAD) schedules AC_PROG_CXX and AC_PROG_CXXCPP if both are AC_REQUIRE'd. libtool.m4 has AC_DEFUN([_LT_AC_LANG_CXX], [AC_REQUIRE([AC_PROG_CXX]) AC_REQUIRE([AC_PROG_CXXCPP]) ])# _LT_AC_LANG_CXX but autoconf generates a configure script that has the expansion of AC_PROG_CXXCPP _before_ the expansion of AC_PROG_CXX. This results in AC_PROG_CXXCPP falling back on /lib/cpp, which fails. The only thing that seems to work (from a user's point of view, so without changing autoconf) is explicitly calling AC_PROG_CXX before calling AC_PROG_LIBTOOL. Annoyingly, I've been unable to reproduce this problem with a minimal configure.ac, so this may be a libtool issue rather than an autoconf one. I'll post more if and when I find out anything. _______________________________________________ Libtool mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/libtool