AC_MSG_ERROR("pdflatex is required")
fi
+AC_PATH_PROG(XMLTO, xmlto)
+AC_PATH_PROG(LATEX, latex)
+AC_PATH_PROG(DVIPS, dvips)
+AC_PATH_PROG(PNGTOPNM, pngtopnm)
+AC_PATH_PROG(PNMTOPS, pnmtops)
+
DOC_BUILD_DATE=`date '+%d-%m-%Y'`
AC_SUBST(DOC_BUILD_DATE)