AC_DEFUN([WAYLAND_SCANNER_RULES], [
    wayland__prefix=${prefix}
    wayland__exec_prefix=${exec_prefix}

    prefix=@prefix@
    exec_prefix=@exec_prefix@

    AC_PATH_PROG([wayland_scanner], [wayland-scanner], [/bin/false],
		 [@bindir@$PATH_SEPARATOR$PATH])
    AC_SUBST_FILE([wayland_scanner_rules])
    AC_SUBST([wayland_protocoldir], [$1])
    wayland_scanner_rules=@datarootdir@/aclocal/wayland-scanner.mk

    prefix=${wayland__prefix}
    exec_prefix=${wayland__exec_prefix}
])