/* stddef.h */

/*
 * Copyright (c) 2014 Wind River Systems, Inc.
 *
 * 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.
 */

#ifndef __INC_stddef_h__
#define __INC_stddef_h__

#include <bits/null.h>
#include <bits/size_t.h>

#if !defined(__ptrdiff_t_defined)
#define __ptrdiff_t_defined
typedef int  ptrdiff_t;
#endif

#if defined(__GNUC__)
#define offsetof(type, member)  __builtin_offsetof(type, member)
#else
#define offsetof(type, member) ((size_t) (&((type *) NULL)->member))
#endif

#endif /* __INC_stddef_h__ */

/* stddef.h */

/*
 * Copyright (c) 2014 Wind River Systems, Inc.
 *
 * 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.
 */

#ifndef __INC_stddef_h__
#define __INC_stddef_h__

#include <bits/null.h>
#include <bits/size_t.h>

#if !defined(__ptrdiff_t_defined)
#define __ptrdiff_t_defined
typedef int  ptrdiff_t;
#endif

#define offsetof(type, member) ((size_t) (&((type *) NULL)->member))

#endif /* __INC_stddef_h__ */

--- 
+++ 
@@ -27,6 +27,10 @@
 typedef int  ptrdiff_t;
 #endif
 
+#if defined(__GNUC__)
+#define offsetof(type, member)  __builtin_offsetof(type, member)
+#else
 #define offsetof(type, member) ((size_t) (&((type *) NULL)->member))
+#endif
 
 #endif /* __INC_stddef_h__ */
lib: Use offsetof() builtin with GCC

The default offsetof() implementation generates a warning
(variably modified <variable> at file scope) when used in
to define the size of an array. By using this builtin with
GCC we avoid the warning and make sure no variable-size
arrays are used.

Change-Id: Iae215f777241f7daaa061067230086dffaa8311d
Signed-off-by: Carles Cufi <853081dc8dca4fe6a7e3c984752718b5db36e060@nordicsemi.no>
