PKG_CHECK_MODULES([LIBUSB1], [libusb-1.0], [
use_libusb1=yes
AC_DEFINE([HAVE_LIBUSB1], [1], [Define if you have libusb-1.x])
- PKG_CHECK_EXISTS([libusb-1.0 >= 1.0.9],
- [AC_DEFINE([HAVE_LIBUSB_ERROR_NAME], [1], [Define if your libusb has libusb_error_name()])],
- [AC_MSG_WARN([libusb-1.x older than 1.0.9 detected, consider updating])])
LIBUSB1_CFLAGS=`echo $LIBUSB1_CFLAGS | sed 's/-I/-isystem /'`
AC_MSG_NOTICE([libusb-1.0 header bug workaround: LIBUSB1_CFLAGS changed to "$LIBUSB1_CFLAGS"])
PKG_CHECK_EXISTS([libusb-1.0 >= 1.0.16],