1 files changed, 21 insertions, 11 deletions

diff --git a/configure.ac b/configure.ac
index e13c571..1f10bb7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -59,6 +59,11 @@ case "$host_os" in
 esac
 AC_SUBST(LIBIRECOVERYLDFLAGS)
 
+AC_ARG_WITH([dummy],
+        [AS_HELP_STRING([--with-dummy], [Use no USB driver at all [default=no]. This is only useful if you just want to query the device list by product type or hardware model. All other operations are no-ops or will return IRECV_E_UNSUPPORTED.])],
+        [],
+        [with_dummy=no])
+
 AS_IF([test "x$have_iokit" = "xyes"], [
         AC_ARG_WITH([iokit],
                 [AS_HELP_STRING([--with-iokit], [Use IOKit instead of libusb on OS X [default=yes]])],
@@ -67,17 +72,22 @@ AS_IF([test "x$have_iokit" = "xyes"], [
         ], []
 )
 
-AS_IF([test "x$with_iokit" = "xyes" && test "x$have_iokit" = "xyes"] , [
-                AC_DEFINE(HAVE_IOKIT, 1, [Define if we have IOKit])
-                USB_BACKEND="IOKit"
-        ],
-        [
-                PKG_CHECK_MODULES(libusb, libusb-1.0 >= $LIBUSB_VERSION)
-                USB_BACKEND="libusb `$PKG_CONFIG --modversion libusb-1.0`"
-                LIBUSB_REQUIRED="libusb-1.0 >= $LIBUSB_VERSION"
-                AC_SUBST(LIBUSB_REQUIRED)
-        ]
-)
+AS_IF([test "x$with_dummy" = "xyes"], [
+        AC_DEFINE(USE_DUMMY, 1, [Define if we are using dummy USB driver])
+        USB_BACKEND="dummy"
+], [
+        AS_IF([test "x$with_iokit" = "xyes" && test "x$have_iokit" = "xyes"] , [
+                        AC_DEFINE(HAVE_IOKIT, 1, [Define if we have IOKit])
+                        USB_BACKEND="IOKit"
+                ],
+                [
+                        PKG_CHECK_MODULES(libusb, libusb-1.0 >= $LIBUSB_VERSION)
+                        USB_BACKEND="libusb `$PKG_CONFIG --modversion libusb-1.0`"
+                        LIBUSB_REQUIRED="libusb-1.0 >= $LIBUSB_VERSION"
+                        AC_SUBST(LIBUSB_REQUIRED)
+                ]
+        )
+])
 
 # Checks for header files.
 AC_HEADER_STDC