features.h revision 1dc9e472e19acfe6dc7f41e429236e7eef7ceda1 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28#ifndef _FEATURES_H_
29#define _FEATURES_H_
30
31/* certain Linux-specific programs expect a <features.h> header file
32 * that defines various features macros
33 */
34
35/* we do include a number of BSD extensions */
36#define  _BSD_SOURCE  1
37
38/* we do include a number of GNU extensions */
39#define  _GNU_SOURCE  1
40
41/* C95 support */
42#undef __USE_ISOC95
43#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199409L
44# define __USE_ISOC95   1
45#endif
46
47/* C99 support */
48#undef __USE_ISOC99
49#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
50# define __USE_ISOC99   1
51#endif
52
53/* Posix support */
54#define  __USE_POSIX   1
55#define  __USE_POSIX2  1
56#define  __USE_XPG     1
57
58#endif /* _FEATURES_H_ */
59