/*
 *  Written by Joel Sherrill <joel@OARcorp.com>.
 *
 *  COPYRIGHT (c) 1989-2014.
 *
 *  On-Line Applications Research Corporation (OAR).
 *
 *  Permission to use, copy, modify, and distribute this software for any
 *  purpose without fee is hereby granted, provided that this entire notice
 *  is included in all copies of any software which is or includes a copy
 *  or modification of this software.
 *
 *  THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
 *  WARRANTY.  IN PARTICULAR,  THE AUTHOR MAKES NO REPRESENTATION
 *  OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY OF THIS
 *  SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
 *
 *  $Id$
 */

/* This file was imported into RIOT from newlib 2.3.0 */

#ifndef SYS_FEATURES_H
#define SYS_FEATURES_H

#ifdef __cplusplus
extern "C" {
#endif

/* Macro to test version of GCC.  Returns 0 for non-GCC or too old GCC. */
#ifndef __GNUC_PREREQ
# if defined __GNUC__ && defined __GNUC_MINOR__
#  define __GNUC_PREREQ(maj, min) \
    ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
# else
#  define __GNUC_PREREQ(maj, min) 0
# endif
#endif /* __GNUC_PREREQ */
/* Version with trailing underscores for BSD compatibility. */
#define __GNUC_PREREQ__(ma, mi) __GNUC_PREREQ(ma, mi)


/*
 * Feature test macros control which symbols are exposed by the system
 * headers.  Any of these must be defined before including any headers.
 *
 * __STRICT_ANSI__ (defined by gcc -ansi, -std=c90, -std=c99, or -std=c11)
 *  ISO C
 *
 * _POSIX_SOURCE (deprecated by _POSIX_C_SOURCE=1)
 * _POSIX_C_SOURCE >= 1
 *  POSIX.1-1990
 *
 * _POSIX_C_SOURCE >= 2
 *  POSIX.2-1992
 *
 * _POSIX_C_SOURCE >= 199309L
 *  POSIX.1b-1993 Real-time extensions
 *
 * _POSIX_C_SOURCE >= 199506L
 *  POSIX.1c-1995 Threads extensions
 *
 * _POSIX_C_SOURCE >= 200112L
 *  POSIX.1-2001 and C99
 *
 * _POSIX_C_SOURCE >= 200809L
 *  POSIX.1-2008
 *
 * _XOPEN_SOURCE
 *  POSIX.1-1990 and XPG4
 *
 * _XOPEN_SOURCE_EXTENDED
 *  SUSv1 (POSIX.2-1992 plus XPG4v2)
 *
 * _XOPEN_SOURCE >= 500
 *  SUSv2 (POSIX.1c-1995 plus XSI)
 *
 * _XOPEN_SOURCE >= 600
 *  SUSv3 (POSIX.1-2001 plus XSI) and C99
 *
 * _XOPEN_SOURCE >= 700
 *  SUSv4 (POSIX.1-2008 plus XSI)
 *
 * _ISOC99_SOURCE or gcc -std=c99 or g++
 *  ISO C99
 *
 * _ISOC11_SOURCE or gcc -std=c11 or g++ -std=c++11
 *  ISO C11
 *
 * _ATFILE_SOURCE (implied by _POSIX_C_SOURCE >= 200809L)
 *  "at" functions
 *
 * _LARGEFILE_SOURCE (deprecated by _XOPEN_SOURCE >= 500)
 *  fseeko, ftello
 *
 * _GNU_SOURCE
 *  All of the above plus GNU extensions
 *
 * _BSD_SOURCE (deprecated by _DEFAULT_SOURCE)
 * _SVID_SOURCE (deprecated by _DEFAULT_SOURCE)
 * _DEFAULT_SOURCE (or none of the above)
 *  POSIX-1.2008 with BSD and SVr4 extensions
 */

#ifdef _GNU_SOURCE
#undef _ATFILE_SOURCE
#define _ATFILE_SOURCE      1
#undef  _DEFAULT_SOURCE
#define _DEFAULT_SOURCE     1
#undef _ISOC99_SOURCE
#define _ISOC99_SOURCE      1
#undef _ISOC11_SOURCE
#define _ISOC11_SOURCE      1
#undef _POSIX_SOURCE
#define _POSIX_SOURCE       1
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE     200809L
#undef _XOPEN_SOURCE
#define _XOPEN_SOURCE       700
#undef _XOPEN_SOURCE_EXTENDED
#define _XOPEN_SOURCE_EXTENDED  1
#endif /* _GNU_SOURCE */

#if defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || \
   (!defined(__STRICT_ANSI__) && !defined(_ANSI_SOURCE) && \
   !defined(_ISOC99_SOURCE) && !defined(_POSIX_SOURCE) && \
   !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE))
#undef _DEFAULT_SOURCE
#define _DEFAULT_SOURCE     1
#endif

#if defined(_DEFAULT_SOURCE)
#undef _POSIX_SOURCE
#define _POSIX_SOURCE       1
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE     200809L
#endif

#if !defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) && \
  ((!defined(__STRICT_ANSI__) && !defined(_ANSI_SOURCE)) || \
   (_XOPEN_SOURCE - 0) >= 500)
#define _POSIX_SOURCE       1
#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 700
#define _POSIX_C_SOURCE     200809L
#elif (_XOPEN_SOURCE - 0) >= 600
#define _POSIX_C_SOURCE     200112L
#elif (_XOPEN_SOURCE - 0) >= 500
#define _POSIX_C_SOURCE     199506L
#elif (_XOPEN_SOURCE - 0) < 500
#define _POSIX_C_SOURCE     2
#endif
#endif

#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200809
#undef _ATFILE_SOURCE
#define _ATFILE_SOURCE      1
#endif

/*
 * The following private macros are used throughout the headers to control
 * which symbols should be exposed.  They are for internal use only, as
 * indicated by the leading double underscore, and must never be used outside
 * of these headers.
 *
 * __POSIX_VISIBLE
 *  any version of POSIX.1; enabled by default, or with _POSIX_SOURCE,
 *  any value of _POSIX_C_SOURCE, or _XOPEN_SOURCE >= 500.
 *
 * __POSIX_VISIBLE >= 2
 *  POSIX.2-1992; enabled by default, with _POSIX_C_SOURCE >= 2,
 *  or _XOPEN_SOURCE >= 500.
 *
 * __POSIX_VISIBLE >= 199309
 *  POSIX.1b-1993; enabled by default, with _POSIX_C_SOURCE >= 199309L,
 *  or _XOPEN_SOURCE >= 500.
 *
 * __POSIX_VISIBLE >= 199506
 *  POSIX.1c-1995; enabled by default, with _POSIX_C_SOURCE >= 199506L,
 *  or _XOPEN_SOURCE >= 500.
 *
 * __POSIX_VISIBLE >= 200112
 *  POSIX.1-2001; enabled by default, with _POSIX_C_SOURCE >= 200112L,
 *  or _XOPEN_SOURCE >= 600.
 *
 * __POSIX_VISIBLE >= 200809
 *  POSIX.1-2008; enabled by default, with _POSIX_C_SOURCE >= 200809L,
 *  or _XOPEN_SOURCE >= 700.
 *
 * __XSI_VISIBLE
 *  XPG4 XSI extensions; enabled with any version of _XOPEN_SOURCE.
 *
 * __XSI_VISIBLE >= 4
 *  SUSv1 XSI extensions; enabled with both _XOPEN_SOURCE and
 *  _XOPEN_SOURCE_EXTENDED together.
 *
 * __XSI_VISIBLE >= 500
 *  SUSv2 XSI extensions; enabled with _XOPEN_SOURCE >= 500.
 *
 * __XSI_VISIBLE >= 600
 *  SUSv3 XSI extensions; enabled with _XOPEN_SOURCE >= 600.
 *
 * __XSI_VISIBLE >= 700
 *  SUSv4 XSI extensions; enabled with _XOPEN_SOURCE >= 700.
 *
 * __ISO_C_VISIBLE >= 1999
 *  ISO C99; enabled with gcc -std=c99 or newer (on by default since GCC 5),
 *  any version of C++, or with _ISOC99_SOURCE, _POSIX_C_SOURCE >= 200112L,
 *  or _XOPEN_SOURCE >= 600.
 *
 * __ISO_C_VISIBLE >= 2011
 *  ISO C11; enabled with gcc -std=c11 or newer (on by default since GCC 5),
 *  g++ -std=c++11 or newer (on by default since GCC 6), or with
 *  _ISOC11_SOURCE.
 *
 * __ATFILE_VISIBLE
 *  "at" functions; enabled by default, with _ATFILE_SOURCE,
 *  _POSIX_C_SOURCE >= 200809L, or _XOPEN_SOURCE >= 700.
 *
 * __LARGEFILE_VISIBLE
 *  fseeko, ftello; enabled with _LARGEFILE_SOURCE or _XOPEN_SOURCE >= 500.
 *
 * __BSD_VISIBLE
 *  BSD extensions; enabled by default, or with _BSD_SOURCE.
 *
 * __SVID_VISIBLE
 *  SVr4 extensions; enabled by default, or with _SVID_SOURCE.
 *
 * __MISC_VISIBLE
 *  Extensions found in both BSD and SVr4 (shorthand for
 *  (__BSD_VISIBLE || __SVID_VISIBLE)), or newlib-specific
 *  extensions; enabled by default.
 *
 * __GNU_VISIBLE
 *  GNU extensions; enabled with _GNU_SOURCE.
 *
 * In all cases above, "enabled by default" means either by defining
 * _DEFAULT_SOURCE, or by not defining any of the public feature test macros.
 * Defining _GNU_SOURCE makes all of the above avaliable.
 */

#ifdef _ATFILE_SOURCE
#define __ATFILE_VISIBLE    1
#else
#define __ATFILE_VISIBLE    0
#endif

#ifdef _DEFAULT_SOURCE
#define __BSD_VISIBLE       1
#else
#define __BSD_VISIBLE       0
#endif

#ifdef _GNU_SOURCE
#define __GNU_VISIBLE       1
#else
#define __GNU_VISIBLE       0
#endif

#if defined(_ISOC11_SOURCE) || \
  (__STDC_VERSION__ - 0) >= 201112L || (__cplusplus - 0) >= 201103L
#define __ISO_C_VISIBLE     2011
#elif defined(_ISOC99_SOURCE) || (_POSIX_C_SOURCE - 0) >= 200112L || \
  (__STDC_VERSION__ - 0) >= 199901L || defined(__cplusplus)
#define __ISO_C_VISIBLE     1999
#else
#define __ISO_C_VISIBLE     1990
#endif

#if defined(_LARGEFILE_SOURCE) || (_XOPEN_SOURCE - 0) >= 500
#define __LARGEFILE_VISIBLE 1
#else
#define __LARGEFILE_VISIBLE 0
#endif

#ifdef _DEFAULT_SOURCE
#define __MISC_VISIBLE      1
#else
#define __MISC_VISIBLE      0
#endif

#if (_POSIX_C_SOURCE - 0) >= 200809L
#define __POSIX_VISIBLE     200809
#elif (_POSIX_C_SOURCE - 0) >= 200112L
#define __POSIX_VISIBLE     200112
#elif (_POSIX_C_SOURCE - 0) >= 199506L
#define __POSIX_VISIBLE     199506
#elif (_POSIX_C_SOURCE - 0) >= 199309L
#define __POSIX_VISIBLE     199309
#elif (_POSIX_C_SOURCE - 0) >= 2 || defined(_XOPEN_SOURCE)
#define __POSIX_VISIBLE     199209
#elif defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE)
#define __POSIX_VISIBLE     199009
#else
#define __POSIX_VISIBLE     0
#endif

#ifdef _DEFAULT_SOURCE
#define __SVID_VISIBLE      1
#else
#define __SVID_VISIBLE      0
#endif

#if (_XOPEN_SOURCE - 0) >= 700
#define __XSI_VISIBLE       700
#elif (_XOPEN_SOURCE - 0) >= 600
#define __XSI_VISIBLE       600
#elif (_XOPEN_SOURCE - 0) >= 500
#define __XSI_VISIBLE       500
#elif defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)
#define __XSI_VISIBLE       4
#elif defined(_XOPEN_SOURCE)
#define __XSI_VISIBLE       1
#else
#define __XSI_VISIBLE       0
#endif

/* RTEMS adheres to POSIX -- 1003.1b with some features from annexes.  */

#ifdef __rtems__
#define _POSIX_JOB_CONTROL          1
#define _POSIX_SAVED_IDS            1
#define _POSIX_VERSION          199309L
#define _POSIX_ASYNCHRONOUS_IO      1
#define _POSIX_FSYNC            1
#define _POSIX_MAPPED_FILES     1
#define _POSIX_MEMLOCK          1
#define _POSIX_MEMLOCK_RANGE        1
#define _POSIX_MEMORY_PROTECTION    1
#define _POSIX_MESSAGE_PASSING      1
#define _POSIX_MONOTONIC_CLOCK      200112L
#define _POSIX_PRIORITIZED_IO       1
#define _POSIX_PRIORITY_SCHEDULING  1
#define _POSIX_REALTIME_SIGNALS     1
#define _POSIX_SEMAPHORES       1
/* #define _POSIX_SHARED_MEMORY_OBJECTS 1 */
#define _POSIX_SYNCHRONIZED_IO      1
#define _POSIX_TIMERS           1
#define _POSIX_BARRIERS                 200112L
#define _POSIX_READER_WRITER_LOCKS      200112L
#define _POSIX_SPIN_LOCKS               200112L


/* In P1003.1b but defined by drafts at least as early as P1003.1c/D10  */
#define _POSIX_THREADS              1
#define _POSIX_THREAD_ATTR_STACKADDR        1
#define _POSIX_THREAD_ATTR_STACKSIZE        1
#define _POSIX_THREAD_PRIORITY_SCHEDULING   1
#define _POSIX_THREAD_PRIO_INHERIT      1
#define _POSIX_THREAD_PRIO_PROTECT      1
#define _POSIX_THREAD_PROCESS_SHARED        1
#define _POSIX_THREAD_SAFE_FUNCTIONS        1

/* P1003.4b/D8 defines the constants below this comment. */
#define _POSIX_SPAWN                1
#define _POSIX_TIMEOUTS             1
#define _POSIX_CPUTIME              1
#define _POSIX_THREAD_CPUTIME           1
#define _POSIX_SPORADIC_SERVER          1
#define _POSIX_THREAD_SPORADIC_SERVER       1
#define _POSIX_DEVICE_CONTROL           1
#define _POSIX_DEVCTL_DIRECTION         1
#define _POSIX_INTERRUPT_CONTROL        1
#define _POSIX_ADVISORY_INFO            1

/* UNIX98 added some new pthread mutex attributes */
#define _UNIX98_THREAD_MUTEX_ATTRIBUTES         1

#endif

/* XMK loosely adheres to POSIX -- 1003.1 */
#ifdef __XMK__
#define _POSIX_THREADS              1
#define _POSIX_THREAD_PRIORITY_SCHEDULING   1
#endif


#ifdef __svr4__
# define _POSIX_JOB_CONTROL     1
# define _POSIX_SAVED_IDS       1
# define _POSIX_VERSION 199009L
#endif

#ifdef __CYGWIN__

#if __POSIX_VISIBLE >= 200809
#define _POSIX_VERSION              200809L
#define _POSIX2_VERSION             200809L
#elif __POSIX_VISIBLE >= 200112
#define _POSIX_VERSION              200112L
#define _POSIX2_VERSION             200112L
#elif __POSIX_VISIBLE >= 199506
#define _POSIX_VERSION              199506L
#define _POSIX2_VERSION             199506L
#elif __POSIX_VISIBLE >= 199309
#define _POSIX_VERSION              199309L
#define _POSIX2_VERSION             199209L
#elif __POSIX_VISIBLE >= 199209
#define _POSIX_VERSION              199009L
#define _POSIX2_VERSION             199209L
#elif __POSIX_VISIBLE
#define _POSIX_VERSION              199009L
#endif
#if __XSI_VISIBLE >= 4
#define _XOPEN_VERSION              __XSI_VISIBLE
#endif

#define _POSIX_ADVISORY_INFO            200809L
/* #define _POSIX_ASYNCHRONOUS_IO           -1 */
#define _POSIX_BARRIERS             200809L
#define _POSIX_CHOWN_RESTRICTED              1
#define _POSIX_CLOCK_SELECTION          200809L
#define _POSIX_CPUTIME              200809L
#define _POSIX_FSYNC                200809L
#define _POSIX_IPV6             200809L
#define _POSIX_JOB_CONTROL               1
#define _POSIX_MAPPED_FILES         200809L
/* #define _POSIX_MEMLOCK               -1 */
#define _POSIX_MEMLOCK_RANGE            200809L
#define _POSIX_MEMORY_PROTECTION        200809L
#define _POSIX_MESSAGE_PASSING          200809L
#define _POSIX_MONOTONIC_CLOCK          200809L
#define _POSIX_NO_TRUNC                  1
/* #define _POSIX_PRIORITIZED_IO            -1 */
#define _POSIX_PRIORITY_SCHEDULING      200809L
#define _POSIX_RAW_SOCKETS          200809L
#define _POSIX_READER_WRITER_LOCKS      200809L
#define _POSIX_REALTIME_SIGNALS         200809L
#define _POSIX_REGEXP                    1
#define _POSIX_SAVED_IDS                 1
#define _POSIX_SEMAPHORES           200809L
#define _POSIX_SHARED_MEMORY_OBJECTS        200809L
#define _POSIX_SHELL                     1
#define _POSIX_SPAWN                200809L
#define _POSIX_SPIN_LOCKS           200809L
/* #define _POSIX_SPORADIC_SERVER           -1 */
#define _POSIX_SYNCHRONIZED_IO          200809L
#define _POSIX_THREAD_ATTR_STACKADDR        200809L
#define _POSIX_THREAD_ATTR_STACKSIZE        200809L
#define _POSIX_THREAD_CPUTIME           200809L
/* #define _POSIX_THREAD_PRIO_INHERIT           -1 */
/* #define _POSIX_THREAD_PRIO_PROTECT           -1 */
#define _POSIX_THREAD_PRIORITY_SCHEDULING   200809L
#define _POSIX_THREAD_PROCESS_SHARED        200809L
#define _POSIX_THREAD_SAFE_FUNCTIONS        200809L
/* #define _POSIX_THREAD_SPORADIC_SERVER        -1 */
#define _POSIX_THREADS              200809L
/* #define _POSIX_TIMEOUTS              -1 */
#define _POSIX_TIMERS               200809L
/* #define _POSIX_TRACE                 -1 */
/* #define _POSIX_TRACE_EVENT_FILTER            -1 */
/* #define _POSIX_TRACE_INHERIT             -1 */
/* #define _POSIX_TRACE_LOG             -1 */
/* #define _POSIX_TYPED_MEMORY_OBJECTS          -1 */
#define _POSIX_VDISABLE                '\0'

#if __POSIX_VISIBLE >= 2
#define _POSIX2_C_VERSION           _POSIX2_VERSION
#define _POSIX2_C_BIND              _POSIX2_VERSION
#define _POSIX2_C_DEV               _POSIX2_VERSION
#define _POSIX2_CHAR_TERM           _POSIX2_VERSION
/* #define _POSIX2_FORT_DEV             -1 */
/* #define _POSIX2_FORT_RUN             -1 */
/* #define _POSIX2_LOCALEDEF                -1 */
/* #define _POSIX2_PBS                  -1 */
/* #define _POSIX2_PBS_ACCOUNTING           -1 */
/* #define _POSIX2_PBS_CHECKPOINT           -1 */
/* #define _POSIX2_PBS_LOCATE               -1 */
/* #define _POSIX2_PBS_MESSAGE              -1 */
/* #define _POSIX2_PBS_TRACK                -1 */
#define _POSIX2_SW_DEV              _POSIX2_VERSION
#define _POSIX2_UPE             _POSIX2_VERSION
#endif /* __POSIX_VISIBLE >= 2 */

#define _POSIX_V6_ILP32_OFF32               -1
#ifdef __LP64__
#define _POSIX_V6_ILP32_OFFBIG              -1
#define _POSIX_V6_LP64_OFF64                 1
#define _POSIX_V6_LPBIG_OFFBIG               1
#else
#define _POSIX_V6_ILP32_OFFBIG               1
#define _POSIX_V6_LP64_OFF64                -1
#define _POSIX_V6_LPBIG_OFFBIG              -1
#endif
#define _POSIX_V7_ILP32_OFF32           _POSIX_V6_ILP32_OFF32
#define _POSIX_V7_ILP32_OFFBIG          _POSIX_V6_ILP32_OFFBIG
#define _POSIX_V7_LP64_OFF64            _POSIX_V6_LP64_OFF64
#define _POSIX_V7_LPBIG_OFFBIG          _POSIX_V6_LPBIG_OFFBIG
#define _XBS5_ILP32_OFF32           _POSIX_V6_ILP32_OFF32
#define _XBS5_ILP32_OFFBIG          _POSIX_V6_ILP32_OFFBIG
#define _XBS5_LP64_OFF64            _POSIX_V6_LP64_OFF64
#define _XBS5_LPBIG_OFFBIG          _POSIX_V6_LPBIG_OFFBIG

#if __XSI_VISIBLE
#define _XOPEN_CRYPT                     1
#define _XOPEN_ENH_I18N                  1
/* #define _XOPEN_LEGACY                -1 */
/* #define _XOPEN_REALTIME              -1 */
/* #define _XOPEN_REALTIME_THREADS          -1 */
#define _XOPEN_SHM                   1
/* #define _XOPEN_STREAMS               -1 */
/* #define _XOPEN_UNIX                  -1 */
#endif /* __XSI_VISIBLE */

/* The value corresponds to UNICODE version 4.0, which is the version
   supported by XP.  Newlib supports 5.2 (2011) but so far Cygwin needs
   the MS conversions for double-byte charsets. */
#define __STDC_ISO_10646__ 200305L

#endif /* __CYGWIN__ */

#ifdef __cplusplus
}
#endif
#endif /* SYS_FEATURES_H */