Bluetooth: nble: Use weak functions printing debug info

Since the headers defining RPC with Nordic chip changes frequently
define weak functions printing BT_WARN("Not implemented") if
function is not defined.
Weak function symbol is marked with "W" as viewed by nm.

Change-Id: Ia39b64c6e89fdddc65683711fd192a235fe754d4
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>

drivers/nble/Makefile

@@ -1 +1 @@
-obj-$(CONFIG_NBLE) += gap.o conn.o gatt.o uart.o rpc_serialize.o rpc_deserialize.o
+obj-$(CONFIG_NBLE) += gap.o conn.o gatt.o uart.o rpc_serialize.o rpc_deserialize.o stubs.o

drivers/nble/stubs.c

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <bluetooth/log.h>
+
+#include "gap_internal.h"
+#include "gatt_internal.h"
+
+#include "rpc_functions_to_quark.h"
+
+#ifndef __weak
+#define __weak __attribute__((weak))
+#endif
+
+#define FN_SIG_NONE(n)							\
+	__weak void n(void)						\
+	{								\
+		BT_WARN("Not implemented");				\
+	}
+LIST_FN_SIG_NONE
+
+#define FN_SIG_S(n, s)							\
+	__weak void n(s _p)						\
+	{								\
+		BT_WARN("Not implemented");				\
+	}
+LIST_FN_SIG_S
+
+#define FN_SIG_P(n, p)							\
+	__weak void n(p _p)						\
+	{								\
+		BT_WARN("Not implemented");				\
+	}
+LIST_FN_SIG_P
+
+#define FN_SIG_S_B(n, s, b, l)						\
+	__weak void n(s _p, b _b, l _l)					\
+	{								\
+		BT_WARN("Not implemented");				\
+	}
+LIST_FN_SIG_S_B
+
+#define FN_SIG_B_B_P(n, b1, l1, b2, l2, p)				\
+	__weak void n(b1 _b1, l1 _l1, b2 _b2, l2 _l2, p _p)		\
+	{								\
+		BT_WARN("Not implemented");				\
+	}
+LIST_FN_SIG_B_B_P
+
+#define FN_SIG_S_P(n, s, p)						\
+	__weak void n(s _s, p _p)					\
+	{								\
+		BT_WARN("Not implemented");				\
+	}
+LIST_FN_SIG_S_P
+
+#define FN_SIG_S_B_P(n, s, b, l, p)					\
+	__weak void n(s _s, b _b, l _l, p _p)				\
+	{								\
+		BT_WARN("Not implemented");				\
+	}
+LIST_FN_SIG_S_B_P
+
+#define FN_SIG_S_B_B_P(n, s, b1, l1, b2, l2, p)				\
+	__weak void n(s _s, b1 _b1, l1 _l1, b2 _b2, l2 _l2, p _p)	\
+	{								\
+		BT_WARN("Not implemented");				\
+	}
+LIST_FN_SIG_S_B_B_P