AC_DEFUN([DOCBOOK_CHECKS],[

AC_ARG_WITH(docbook-tools,
[  --with-docbook-tools    if you have a complete build environment for
                          docbook, you can use this flag so that various
                          targets (PDF, HTML, etc.) will be generated during
                          the build process. [default=no]], [
 if test "$with_docbook_tools" = yes; then
  AC_CHECK_PROG(DB, db2pdf, "yes")
  if test "$DB" = yes; then
   AM_CONDITIONAL(DOCBOOK, true)
  else
   AM_CONDITIONAL(DOCBOOK, false)
  fi
 fi
],[
 AM_CONDITIONAL(DOCBOOK, false)
])
])