if test "$_version" = "0" ; then
AC_MSG_ERROR([[We could not detect the boost libraries (version $boost_lib_version_req_shorten or higher). If you have a staged boost library (still not installed) please specify \$BOOST_ROOT in your environment and do not give a PATH to --with-boost option. If you are sure you have boost installed, then check your version number looking in <boost/version.hpp>. See http://randspringer.de/boost for more documentation.]])
else
- AC_MSG_NOTICE([Your boost libraries seems to old (version $_version).])
+ AC_MSG_ERROR([Your boost libraries seems to old (version $_version).])
fi
else
AC_SUBST(BOOST_CPPFLAGS)