zephyr/lib/libc/minimal/include/stddef.h
Carles Cufi 1980b7bb0f 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 <carles.cufi@nordicsemi.no>
2016-08-27 18:29:27 +00:00

36 lines
1,023 B
C

/* 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__ */