--- autoconf-2.58/lib/autoconf/c.m4.orig Thu Sep 25 09:28:51 2003 +++ autoconf-2.58/lib/autoconf/c.m4 Mon Nov 17 10:54:37 2003 @@ -640,7 +640,7 @@ fi AC_MSG_RESULT([$CXXCPP]) _AC_PROG_PREPROC_WORKS_IFELSE([], - [AC_MSG_FAILURE([C++ preprocessor "$CXXCPP" fails sanity check])]) + [AC_MSG_WARN([C++ preprocessor "$CXXCPP" fails sanity check])]) AC_SUBST(CXXCPP)dnl AC_LANG_POP(C++)dnl ])# AC_PROG_CXXCPP