#ifdef HAVE_mpc
#include <mpc.h>
# ifdef HAVE_mpc
-extern tree do_mpc_arg2 (tree, tree, tree, int (*)(mpc_ptr, mpc_srcptr, mpc_srcptr, mpc_rnd_t));
+extern tree do_mpc_arg2 (tree, tree, tree, int, int (*)(mpc_ptr, mpc_srcptr, mpc_srcptr, mpc_rnd_t));
# endif
# if MPC_VERSION >= MPC_VERSION_NUM(0,6,1)
# define HAVE_mpc_pow
# endif
+# if MPC_VERSION >= MPC_VERSION_NUM(0,7,1)
+# define HAVE_mpc_arc
+# endif
#endif
#endif
#include "machmode.h"