apps/netutils/telnetd:  Fix undefined reference to setsockopt.
Recent change from Xiao Xiang enabled the SO_REUSEADDR socket option unconditionally.  This, of course, causes link time failures if socket options are not enabled:
apps/netutils/telnetd/telnetd_daemon.c:182: undefined reference to 'setsockopt'.
Observed during build testing with configuration rddrone-uavcan144:nsh
@@ -176,6 +176,7 @@ static int telnetd_daemon(int argc, FAR char *argv[])
goto errout_with_daemon;
}
+#ifdef CONFIG_NET_SOCKOPTS
/* Set socket to reuse address */
optval = 1;
@@ -185,6 +186,7 @@ static int telnetd_daemon(int argc, FAR char *argv[])
nerr("ERROR: setsockopt SO_REUSEADDR failure: %d\n", errno);
goto errout_with_socket;
}
+#endif
/* Bind the socket to a local address */
@@ -261,9 +263,9 @@ static int telnetd_daemon(int argc, FAR char *argv[])
}
}
+#ifdef CONFIG_NET_SOLINGER
/* Configure to "linger" until all data is sent when the socket is closed */
-#ifdef CONFIG_NET_SOLINGER
ling.l_onoff = 1;
ling.l_linger = 30; /* timeout is seconds */
if (setsockopt(acceptsd, SOL_SOCKET, SO_LINGER, &ling, sizeof(struct linger)) < 0)
