AC_ARG_WITH([libtirpc],

	   AS_HELP_STRING([--with-libtirpc], [Use libtirpc as RPC implementation (instead of sunrpc)]),

	   [], [ with_libtirpc=no ])

AS_IF([test "x$with_libtirpc" != xno], 

      [PKG_CHECK_MODULES([TIRPC], 

			 [libtirpc], 

			 [RPC_CFLAGS=$TIRPC_CFLAGS; RPC_LIBS=$TIRPC_LIBS;],

			[AC_MSG_ERROR([libtirpc requested, but library not found.])]

		       )], 

      [AC_CHECK_HEADER(rpc/rpc.h, 

		      [RPC_CFLAGS=""; RPC_LIBS="";],

		      [AC_MSG_ERROR([sunrpc requested, but headers are not present.])]

		     )]

)

AC_SUBST(RPC_CFLAGS)

AC_SUBST(RPC_LIBS)