+AC_MSG_CHECKING([for libftdi highspeed device support])
+AC_COMPILE_IFELSE([
+#include <stdio.h>
+#include <ftdi.h>
+enum ftdi_chip_type x = TYPE_2232H;
+ ], [
+ AC_DEFINE(BUILD_FT2232_HIGHSPEED, [1],
+ [Support FT2232H/FT4232HS with FTD2XX or libftdi.])
+ build_ft2232_highspeed=yes
+ ], [
+ build_ft2232_highspeed=no
+ ])
+ AC_MSG_RESULT([$build_ft2232_highspeed])
+
+ if test $build_ft2232_highspeed = no; then
+ AC_MSG_WARN([You need a newer libftdi version (0.16 or later).])
+ fi
+