LCOM1920-T02G10

/*        $NetBSD: featuretest.h,v 1.10 2013/04/26 18:29:06 christos Exp $        */

/*

 * Written by Klaus Klein <kleink@NetBSD.org>, February 2, 1998.

 * Public domain.

 *

 * NOTE: Do not protect this header against multiple inclusion.  Doing

 * so can have subtle side-effects due to header file inclusion order

 * and testing of e.g. _POSIX_SOURCE vs. _POSIX_C_SOURCE.  Instead,

 * protect each CPP macro that we want to supply.

 */

/*

 * Feature-test macros are defined by several standards, and allow an

 * application to specify what symbols they want the system headers to

 * expose, and hence what standard they want them to conform to.

 * There are two classes of feature-test macros.  The first class

 * specify complete standards, and if one of these is defined, header

 * files will try to conform to the relevant standard.  They are:

 *

 * ANSI macros:

 * _ANSI_SOURCE                        ANSI C89

 *

 * POSIX macros:

 * _POSIX_SOURCE == 1                IEEE Std 1003.1 (version?)

 * _POSIX_C_SOURCE == 1                IEEE Std 1003.1-1990

 * _POSIX_C_SOURCE == 2                IEEE Std 1003.2-1992

 * _POSIX_C_SOURCE == 199309L        IEEE Std 1003.1b-1993

 * _POSIX_C_SOURCE == 199506L        ISO/IEC 9945-1:1996

 * _POSIX_C_SOURCE == 200112L        IEEE Std 1003.1-2001

 * _POSIX_C_SOURCE == 200809L   IEEE Std 1003.1-2008

 *

 * X/Open macros:

 * _XOPEN_SOURCE                System Interfaces and Headers, Issue 4, Ver 2

 * _XOPEN_SOURCE_EXTENDED == 1        XSH4.2 UNIX extensions

 * _XOPEN_SOURCE == 500                System Interfaces and Headers, Issue 5

 * _XOPEN_SOURCE == 520                Networking Services (XNS), Issue 5.2

 * _XOPEN_SOURCE == 600                IEEE Std 1003.1-2001, XSI option

 * _XOPEN_SOURCE == 700                IEEE Std 1003.1-2008, XSI option

 *

 * NetBSD macros:

 * _NETBSD_SOURCE == 1                Make all NetBSD features available.

 *

 * If more than one of these "major" feature-test macros is defined,

 * then the set of facilities provided (and namespace used) is the

 * union of that specified by the relevant standards, and in case of

 * conflict, the earlier standard in the above list has precedence (so

 * if both _POSIX_C_SOURCE and _NETBSD_SOURCE are defined, the version

 * of rename() that's used is the POSIX one).  If none of the "major"

 * feature-test macros is defined, _NETBSD_SOURCE is assumed.

 *

 * There are also "minor" feature-test macros, which enable extra

 * functionality in addition to some base standard.  They should be

 * defined along with one of the "major" macros.  The "minor" macros

 * are:

 *

 * _REENTRANT

 * _ISOC99_SOURCE

 * _ISOC11_SOURCE

 * _LARGEFILE_SOURCE                Large File Support

 *                <http://ftp.sas.com/standards/large.file/x_open.20Mar96.html>

 */

#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)

#define _POSIX_C_SOURCE        1L

#endif

#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \

    !defined(_XOPEN_SOURCE) && !defined(_NETBSD_SOURCE)

#define _NETBSD_SOURCE 1

#endif

/* Compatibility for older version of autotools. */

#if defined(_MINIX)

#undef _MINIX

#define _NETBSD_SOURCE 1

#endif /* defined(__minix) */

/* Never define _REENTRANT on Minix */

#if !defined(__minix)

#if ((_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500) && \

    !defined(_REENTRANT)

#define _REENTRANT

#endif /* !defined(__minix) */

#endif