dnl Check that the chosen qemu has virtio-serial support.
if test "x$vmchannel_test" != "xno"; then
AC_MSG_CHECKING([that $QEMU -help works])
dnl Check that the chosen qemu has virtio-serial support.
if test "x$vmchannel_test" != "xno"; then
AC_MSG_CHECKING([that $QEMU -help works])