1// © 2016 and later: Unicode, Inc. and others.
2// License & terms of use: http://www.unicode.org/copyright.html
3/*
4*******************************************************************************
5* Copyright (C) 2011-2015, International Business Machines
6* Corporation and others. All Rights Reserved.
7*******************************************************************************
8* file name: uposixdefs.h
9* encoding: UTF-8
10* tab size: 8 (not used)
11* indentation:4
12*
13* created on: 2011jul25
14* created by: Markus W. Scherer
15*
16* Common definitions for implementation files working with POSIX functions.
17* *Important*: #include this file before any other header files!
18*/
19
20#ifndef __UPOSIXDEFS_H__
21#define __UPOSIXDEFS_H__
22
23/*
24 * Define _XOPEN_SOURCE for access to POSIX functions.
25 *
26 * We cannot use U_PLATFORM from platform.h/utypes.h because
27 * "The Open Group Base Specifications"
28 * chapter "2.2 The Compilation Environment" says:
29 * "In the compilation of an application that #defines a feature test macro
30 * specified by IEEE Std 1003.1-2001,
31 * no header defined by IEEE Std 1003.1-2001 shall be included prior to
32 * the definition of the feature test macro."
33 */
34#ifdef _XOPEN_SOURCE
35 /* Use the predefined value. */
36#else
37 /*
38 * Version 6.0:
39 * The Open Group Base Specifications Issue 6 (IEEE Std 1003.1, 2004 Edition)
40 * also known as
41 * SUSv3 = Open Group Single UNIX Specification, Version 3 (UNIX03)
42 *
43 * Note: This definition used to be in C source code (e.g., putil.c)
44 * and define _XOPEN_SOURCE to different values depending on __STDC_VERSION__.
45 * In C++ source code (e.g., putil.cpp), __STDC_VERSION__ is not defined at all.
46 */
47# define _XOPEN_SOURCE 600
48#endif
49
50/*
51 * Make sure things like realpath and such functions work.
52 * Poorly upgraded Solaris machines can't have this defined.
53 * Cleanly installed Solaris can use this #define.
54 *
55 * z/OS needs this definition for timeval and to get usleep.
56 */
57#if !defined(_XOPEN_SOURCE_EXTENDED) && defined(__TOS_MVS__)
58# define _XOPEN_SOURCE_EXTENDED 1
59#endif
60
61/**
62 * Solaris says:
63 * "...it is invalid to compile an XPG6 or a POSIX.1-2001 application with anything other
64 * than a c99 or later compiler."
65 * Apparently C++11 is not "or later". Work around this.
66 */
67#if defined(__cplusplus) && (defined(sun) || defined(__sun)) && !defined (_STDC_C99)
68# define _STDC_C99
69#endif
70
71#if !defined _POSIX_C_SOURCE && \
72 defined(__APPLE__) && defined(__MACH__) && !defined(__clang__)
73// Needed to prevent EOWNERDEAD issues with GCC on Mac
74#define _POSIX_C_SOURCE 200809L
75#endif
76
77#endif /* __UPOSIXDEFS_H__ */
78