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74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/*
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*******************************************************************************
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* Copyright (C) 2011-2012, International Business Machines
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* Corporation and others. All Rights Reserved.
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*******************************************************************************
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* file name: uposixdefs.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2011jul25
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* created by: Markus W. Scherer
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*
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* Common definitions for implementation files working with POSIX functions.
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* *Important*: #include this file before any other header files!
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*/
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#ifndef __UPOSIXDEFS_H__
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#define __UPOSIXDEFS_H__
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/*
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* Define _XOPEN_SOURCE for access to POSIX functions.
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*
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* We cannot use U_PLATFORM from platform.h/utypes.h because
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* "The Open Group Base Specifications"
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* chapter "2.2 The Compilation Environment" says:
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* "In the compilation of an application that #defines a feature test macro
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* specified by IEEE Std 1003.1-2001,
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* no header defined by IEEE Std 1003.1-2001 shall be included prior to
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* the definition of the feature test macro."
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*/
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#ifdef _XOPEN_SOURCE
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/* Use the predefined value. */
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#else
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/*
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* Version 6.0:
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* The Open Group Base Specifications Issue 6 (IEEE Std 1003.1, 2004 Edition)
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* also known as
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* SUSv3 = Open Group Single UNIX Specification, Version 3 (UNIX03)
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*
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* Note: This definition used to be in C source code (e.g., putil.c)
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* and define _XOPEN_SOURCE to different values depending on __STDC_VERSION__.
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* In C++ source code (e.g., putil.cpp), __STDC_VERSION__ is not defined at all.
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*/
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# define _XOPEN_SOURCE 600
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#endif
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/*
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* Make sure things like readlink and such functions work.
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* Poorly upgraded Solaris machines can't have this defined.
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* Cleanly installed Solaris can use this #define.
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*
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* z/OS needs this definition for timeval and to get usleep.
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*/
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#if !defined(_XOPEN_SOURCE_EXTENDED)
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# define _XOPEN_SOURCE_EXTENDED 1
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#endif
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/*
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* There is an issue with turning on _XOPEN_SOURCE_EXTENDED on certain platforms.
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* A compatibility issue exists between turning on _XOPEN_SOURCE_EXTENDED and using
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* standard C++ string class. As a result, standard C++ string class needs to be
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* turned off for the follwing platforms:
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* -AIX/VACPP
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* -Solaris/GCC
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*/
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#if (U_PLATFORM == U_PF_AIX && !defined(__GNUC__)) || (U_PLATFORM == U_PF_SOLARIS && defined(__GNUC__))
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# if _XOPEN_SOURCE_EXTENDED && !defined(U_HAVE_STD_STRING)
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# define U_HAVE_STD_STRING 0
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# endif
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#endif
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#endif /* __UPOSIXDEFS_H__ */
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