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#endif

/*-

 * The following definitions are an extension of the behavior originally

 * implemented in , but with a different level of granularity.

 * POSIX.1 requires that the macros we test be defined before any standard

 * header file is included.

 *

 * Here's a quick run-down of the versions:

 *  defined(_POSIX_SOURCE)		1003.1-1988

 *  _POSIX_C_SOURCE == 1		1003.1-1990

 *  _POSIX_C_SOURCE == 2		1003.2-1992 C Language Binding Option

 *  _POSIX_C_SOURCE == 199309		1003.1b-1993

 *  _POSIX_C_SOURCE == 199506		1003.1c-1995, 1003.1i-1995,

 *					and the omnibus ISO/IEC 9945-1: 1996

 *  _POSIX_C_SOURCE == 200112		1003.1-2001

 *  _POSIX_C_SOURCE == 200809		1003.1-2008

 *

 * In addition, the X/Open Portability Guide, which is now the Single UNIX

 * Specification, defines a feature-test macro which indicates the version of

 * that specification, and which subsumes _POSIX_C_SOURCE.

 *

 * Our macros begin with two underscores to avoid namespace screwage.

 */

/* Deal with _GNU_SOURCE, which implies everything and the kitchen sink */

#ifdef _GNU_SOURCE

#undef _XOPEN_SOURCE

#define	_XOPEN_SOURCE		700

#define	__BSD_VISIBLE		1

#define	__GNU_VISIBLE		1

#endif

#define	__GNU_VISIBLE		1

/* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */

#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1

#undef _POSIX_C_SOURCE		/* Probably illegal, but beyond caring now. */

#define	_POSIX_C_SOURCE		199009

#endif

/* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */

#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2

#undef _POSIX_C_SOURCE

#define	_POSIX_C_SOURCE		199209

#endif

/* Deal with various X/Open Portability Guides and Single UNIX Spec. */

#ifdef _XOPEN_SOURCE

#if _XOPEN_SOURCE - 0 >= 700

#define	__XSI_VISIBLE		700

#undef _POSIX_C_SOURCE

#define	_POSIX_C_SOURCE		200809

#elif _XOPEN_SOURCE - 0 >= 600

#define	__XSI_VISIBLE		600

#undef _POSIX_C_SOURCE

#define	_POSIX_C_SOURCE		200112

#elif _XOPEN_SOURCE - 0 >= 500

#define	__XSI_VISIBLE		500

#undef _POSIX_C_SOURCE

#define	_POSIX_C_SOURCE		199506

#endif

#endif

/*

 * Deal with all versions of POSIX.  The ordering relative to the tests above is

 * important.

 */

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

#define	_POSIX_C_SOURCE		198808

#endif

#ifdef _POSIX_C_SOURCE

#if _POSIX_C_SOURCE >= 200809

#define	__POSIX_VISIBLE		200809

#define	__ISO_C_VISIBLE		1999

#elif _POSIX_C_SOURCE >= 200112

#define	__POSIX_VISIBLE		200112

#define	__ISO_C_VISIBLE		1999

#elif _POSIX_C_SOURCE >= 199506

#define	__POSIX_VISIBLE		199506

#define	__ISO_C_VISIBLE		1990

#elif _POSIX_C_SOURCE >= 199309

#define	__POSIX_VISIBLE		199309

#define	__ISO_C_VISIBLE		1990

#elif _POSIX_C_SOURCE >= 199209

#define	__POSIX_VISIBLE		199209

#define	__ISO_C_VISIBLE		1990

#elif _POSIX_C_SOURCE >= 199009

#define	__POSIX_VISIBLE		199009

#define	__ISO_C_VISIBLE		1990

#else

#define	__POSIX_VISIBLE		198808

#define	__ISO_C_VISIBLE		0

#endif /* _POSIX_C_SOURCE */

#else

/*-

 * Deal with _ANSI_SOURCE:

 * If it is defined, and no other compilation environment is explicitly

 * requested, then define our internal feature-test macros to zero.  This

 * makes no difference to the preprocessor (undefined symbols in preprocessing

 * expressions are defined to have value zero), but makes it more convenient for

 * a test program to print out the values.

 *

 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as

 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation

 * environment (and in fact we will never get here).

 */

#if defined(_ANSI_SOURCE)	/* Hide almost everything. */

#define	__POSIX_VISIBLE		0

#define	__XSI_VISIBLE		0

#define	__BSD_VISIBLE		0

#define	__ISO_C_VISIBLE		1990

#elif defined(_C99_SOURCE)	/* Localism to specify strict C99 env. */

#define	__POSIX_VISIBLE		0

#define	__XSI_VISIBLE		0

#define	__BSD_VISIBLE		0

#define	__ISO_C_VISIBLE		1999

#elif defined(_C11_SOURCE)	/* Localism to specify strict C11 env. */

#define	__POSIX_VISIBLE		0

#define	__XSI_VISIBLE		0

#define	__BSD_VISIBLE		0

#define	__ISO_C_VISIBLE		2011

#else				/* Default: everything except __GNU_VISIBLE. */

#define	__POSIX_VISIBLE		200809

#define	__XSI_VISIBLE		700

#define	__BSD_VISIBLE		1

#define	__ISO_C_VISIBLE		2011

#endif