-AC_DEFINE([LIBUDEV_I_KNOW_THE_API_IS_SUBJECT_TO_CHANGE], 1, [I know the API is subject to change.])
+#### HAL compat support (optional) ####
+
+AC_ARG_ENABLE([hal-compat],
+ AS_HELP_STRING([--disable-hal-compat],[Disable optional HAL->udev transition compatibility support]),
+ [
+ case "${enableval}" in
+ yes) halcompat=yes ;;
+ no) halcompat=no ;;
+ *) AC_MSG_ERROR(bad value ${enableval} for --disable-hal-compat) ;;
+ esac
+ ],
+ [halcompat=auto])
+if test "x${halcompat}" != xno -a "x$HAVE_HAL" = "x0" -a "x$HAVE_UDEV" = "x1" ; then
+ HAVE_HAL_COMPAT=1
+ AC_DEFINE([HAVE_HAL_COMPAT], 1, [Have HAL compatibility.])
+else
+ HAVE_HAL_COMPAT=0
+fi
+
+AC_SUBST(HAVE_HAL_COMPAT)
+AM_CONDITIONAL([HAVE_HAL_COMPAT], [test "x$HAVE_HAL_COMPAT" = x1])