--- configure.ac.orig	2013-10-06 22:43:37 UTC
+++ configure.ac
@@ -89,11 +89,11 @@ case $host in
 	os="freebsd"
 	threads="pthreads"
 
-	CFLAGS="$CFLAGS -I/usr/local/include"
-	LDFLAGS="$LDFLAGS -L/usr/local/lib"
-	LIBS="${LIBS}"
 	AC_CHECK_LIB([usb], [libusb_init], [LIBS_LIBUSB_PRIVATE="${LIBS_LIBUSB_PRIVATE} -lusb"], [hidapi_lib_error libusb])
-	AC_CHECK_LIB([iconv], [iconv_open], [LIBS_LIBUSB_PRIVATE="${LIBS_LIBUSB_PRIVATE} -liconv"], [hidapi_lib_error libiconv])
+	AC_CHECK_DECLS([libusb_get_string_descriptor], [], [], [[#include <libusb.h>]])
+	AC_CHECK_DECLS([libusb_handle_events_completed], [], [], [[#include <libusb.h>]])
+	AM_ICONV
+	LIBS_LIBUSB_PRIVATE="${LIBS_LIBUSB_PRIVATE} ${LTLIBICONV}"
 	echo libs_priv: $LIBS_LIBUSB_PRIVATE
 	;;
 *-mingw*)