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  1. /*
  2.  *  Written by Joel Sherrill <joel@OARcorp.com>.
  3.  *
  4.  *  COPYRIGHT (c) 1989-2014.
  5.  *
  6.  *  On-Line Applications Research Corporation (OAR).
  7.  *
  8.  *  Permission to use, copy, modify, and distribute this software for any
  9.  *  purpose without fee is hereby granted, provided that this entire notice
  10.  *  is included in all copies of any software which is or includes a copy
  11.  *  or modification of this software.
  12.  *
  13.  *  THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
  14.  *  WARRANTY.  IN PARTICULAR,  THE AUTHOR MAKES NO REPRESENTATION
  15.  *  OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY OF THIS
  16.  *  SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
  17.  *
  18.  *  $Id$
  19.  */
  20.  
  21. #ifndef _SYS_FEATURES_H
  22. #define _SYS_FEATURES_H
  23.  
  24. #ifdef __cplusplus
  25. extern "C" {
  26. #endif
  27.  
  28. #include <_newlib_version.h>
  29.  
  30. /* Macro to test version of GCC.  Returns 0 for non-GCC or too old GCC. */
  31. #ifndef __GNUC_PREREQ
  32. # if defined __GNUC__ && defined __GNUC_MINOR__
  33. #  define __GNUC_PREREQ(maj, min) \
  34.         ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
  35. # else
  36. #  define __GNUC_PREREQ(maj, min) 0
  37. # endif
  38. #endif /* __GNUC_PREREQ */
  39. /* Version with trailing underscores for BSD compatibility. */
  40. #define __GNUC_PREREQ__(ma, mi) __GNUC_PREREQ(ma, mi)
  41.  
  42.  
  43. /*
  44.  * Feature test macros control which symbols are exposed by the system
  45.  * headers.  Any of these must be defined before including any headers.
  46.  *
  47.  * __STRICT_ANSI__ (defined by gcc -ansi, -std=c90, -std=c99, or -std=c11)
  48.  *      ISO C
  49.  *
  50.  * _POSIX_SOURCE (deprecated by _POSIX_C_SOURCE=1)
  51.  * _POSIX_C_SOURCE >= 1
  52.  *      POSIX.1-1990
  53.  *
  54.  * _POSIX_C_SOURCE >= 2
  55.  *      POSIX.2-1992
  56.  *
  57.  * _POSIX_C_SOURCE >= 199309L
  58.  *      POSIX.1b-1993 Real-time extensions
  59.  *
  60.  * _POSIX_C_SOURCE >= 199506L
  61.  *      POSIX.1c-1995 Threads extensions
  62.  *
  63.  * _POSIX_C_SOURCE >= 200112L
  64.  *      POSIX.1-2001 and C99
  65.  *
  66.  * _POSIX_C_SOURCE >= 200809L
  67.  *      POSIX.1-2008
  68.  *
  69.  * _XOPEN_SOURCE
  70.  *      POSIX.1-1990 and XPG4
  71.  *
  72.  * _XOPEN_SOURCE_EXTENDED
  73.  *      SUSv1 (POSIX.2-1992 plus XPG4v2)
  74.  *
  75.  * _XOPEN_SOURCE >= 500
  76.  *      SUSv2 (POSIX.1c-1995 plus XSI)
  77.  *
  78.  * _XOPEN_SOURCE >= 600
  79.  *      SUSv3 (POSIX.1-2001 plus XSI) and C99
  80.  *
  81.  * _XOPEN_SOURCE >= 700
  82.  *      SUSv4 (POSIX.1-2008 plus XSI)
  83.  *
  84.  * _ISOC99_SOURCE or gcc -std=c99 or g++
  85.  *      ISO C99
  86.  *
  87.  * _ISOC11_SOURCE or gcc -std=c11 or g++ -std=c++11
  88.  *      ISO C11
  89.  *
  90.  * _ATFILE_SOURCE (implied by _POSIX_C_SOURCE >= 200809L)
  91.  *      "at" functions
  92.  *
  93.  * _LARGEFILE_SOURCE (deprecated by _XOPEN_SOURCE >= 500)
  94.  *      fseeko, ftello
  95.  *
  96.  * _GNU_SOURCE
  97.  *      All of the above plus GNU extensions
  98.  *
  99.  * _BSD_SOURCE (deprecated by _DEFAULT_SOURCE)
  100.  * _SVID_SOURCE (deprecated by _DEFAULT_SOURCE)
  101.  * _DEFAULT_SOURCE (or none of the above)
  102.  *      POSIX-1.2008 with BSD and SVr4 extensions
  103.  */
  104.  
  105. #ifdef _GNU_SOURCE
  106. #undef _ATFILE_SOURCE
  107. #define _ATFILE_SOURCE          1
  108. #undef  _DEFAULT_SOURCE
  109. #define _DEFAULT_SOURCE         1
  110. #undef _ISOC99_SOURCE
  111. #define _ISOC99_SOURCE          1
  112. #undef _ISOC11_SOURCE
  113. #define _ISOC11_SOURCE          1
  114. #undef _POSIX_SOURCE
  115. #define _POSIX_SOURCE           1
  116. #undef _POSIX_C_SOURCE
  117. #define _POSIX_C_SOURCE         200809L
  118. #undef _XOPEN_SOURCE
  119. #define _XOPEN_SOURCE           700
  120. #undef _XOPEN_SOURCE_EXTENDED
  121. #define _XOPEN_SOURCE_EXTENDED  1
  122. #endif /* _GNU_SOURCE */
  123.  
  124. #if defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || \
  125.    (!defined(__STRICT_ANSI__) && !defined(_ANSI_SOURCE) && \
  126.    !defined(_ISOC99_SOURCE) && !defined(_POSIX_SOURCE) && \
  127.    !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE))
  128. #undef _DEFAULT_SOURCE
  129. #define _DEFAULT_SOURCE         1
  130. #endif
  131.  
  132. #if defined(_DEFAULT_SOURCE)
  133. #undef _POSIX_SOURCE
  134. #define _POSIX_SOURCE           1
  135. #undef _POSIX_C_SOURCE
  136. #define _POSIX_C_SOURCE         200809L
  137. #endif
  138.  
  139. #if !defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) && \
  140.   ((!defined(__STRICT_ANSI__) && !defined(_ANSI_SOURCE)) || \
  141.    (_XOPEN_SOURCE - 0) >= 500)
  142. #define _POSIX_SOURCE           1
  143. #if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 700
  144. #define _POSIX_C_SOURCE         200809L
  145. #elif (_XOPEN_SOURCE - 0) >= 600
  146. #define _POSIX_C_SOURCE         200112L
  147. #elif (_XOPEN_SOURCE - 0) >= 500
  148. #define _POSIX_C_SOURCE         199506L
  149. #elif (_XOPEN_SOURCE - 0) < 500
  150. #define _POSIX_C_SOURCE         2
  151. #endif
  152. #endif
  153.  
  154. #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200809
  155. #undef _ATFILE_SOURCE
  156. #define _ATFILE_SOURCE          1
  157. #endif
  158.  
  159. /*
  160.  * The following private macros are used throughout the headers to control
  161.  * which symbols should be exposed.  They are for internal use only, as
  162.  * indicated by the leading double underscore, and must never be used outside
  163.  * of these headers.
  164.  *
  165.  * __POSIX_VISIBLE
  166.  *      any version of POSIX.1; enabled by default, or with _POSIX_SOURCE,
  167.  *      any value of _POSIX_C_SOURCE, or _XOPEN_SOURCE >= 500.
  168.  *
  169.  * __POSIX_VISIBLE >= 2
  170.  *      POSIX.2-1992; enabled by default, with _POSIX_C_SOURCE >= 2,
  171.  *      or _XOPEN_SOURCE >= 500.
  172.  *
  173.  * __POSIX_VISIBLE >= 199309
  174.  *      POSIX.1b-1993; enabled by default, with _POSIX_C_SOURCE >= 199309L,
  175.  *      or _XOPEN_SOURCE >= 500.
  176.  *
  177.  * __POSIX_VISIBLE >= 199506
  178.  *      POSIX.1c-1995; enabled by default, with _POSIX_C_SOURCE >= 199506L,
  179.  *      or _XOPEN_SOURCE >= 500.
  180.  *
  181.  * __POSIX_VISIBLE >= 200112
  182.  *      POSIX.1-2001; enabled by default, with _POSIX_C_SOURCE >= 200112L,
  183.  *      or _XOPEN_SOURCE >= 600.
  184.  *
  185.  * __POSIX_VISIBLE >= 200809
  186.  *      POSIX.1-2008; enabled by default, with _POSIX_C_SOURCE >= 200809L,
  187.  *      or _XOPEN_SOURCE >= 700.
  188.  *
  189.  * __XSI_VISIBLE
  190.  *      XPG4 XSI extensions; enabled with any version of _XOPEN_SOURCE.
  191.  *
  192.  * __XSI_VISIBLE >= 4
  193.  *      SUSv1 XSI extensions; enabled with both _XOPEN_SOURCE and
  194.  *      _XOPEN_SOURCE_EXTENDED together.
  195.  *
  196.  * __XSI_VISIBLE >= 500
  197.  *      SUSv2 XSI extensions; enabled with _XOPEN_SOURCE >= 500.
  198.  *
  199.  * __XSI_VISIBLE >= 600
  200.  *      SUSv3 XSI extensions; enabled with _XOPEN_SOURCE >= 600.
  201.  *
  202.  * __XSI_VISIBLE >= 700
  203.  *      SUSv4 XSI extensions; enabled with _XOPEN_SOURCE >= 700.
  204.  *
  205.  * __ISO_C_VISIBLE >= 1999
  206.  *      ISO C99; enabled with gcc -std=c99 or newer (on by default since GCC 5),
  207.  *      any version of C++, or with _ISOC99_SOURCE, _POSIX_C_SOURCE >= 200112L,
  208.  *      or _XOPEN_SOURCE >= 600.
  209.  *
  210.  * __ISO_C_VISIBLE >= 2011
  211.  *      ISO C11; enabled with gcc -std=c11 or newer (on by default since GCC 5),
  212.  *      g++ -std=c++11 or newer (on by default since GCC 6), or with
  213.  *      _ISOC11_SOURCE.
  214.  *
  215.  * __ATFILE_VISIBLE
  216.  *      "at" functions; enabled by default, with _ATFILE_SOURCE,
  217.  *      _POSIX_C_SOURCE >= 200809L, or _XOPEN_SOURCE >= 700.
  218.  *
  219.  * __LARGEFILE_VISIBLE
  220.  *      fseeko, ftello; enabled with _LARGEFILE_SOURCE or _XOPEN_SOURCE >= 500.
  221.  *
  222.  * __BSD_VISIBLE
  223.  *      BSD extensions; enabled by default, or with _BSD_SOURCE.
  224.  *
  225.  * __SVID_VISIBLE
  226.  *      SVr4 extensions; enabled by default, or with _SVID_SOURCE.
  227.  *
  228.  * __MISC_VISIBLE
  229.  *      Extensions found in both BSD and SVr4 (shorthand for
  230.  *      (__BSD_VISIBLE || __SVID_VISIBLE)), or newlib-specific
  231.  *      extensions; enabled by default.
  232.  *
  233.  * __GNU_VISIBLE
  234.  *      GNU extensions; enabled with _GNU_SOURCE.
  235.  *
  236.  * In all cases above, "enabled by default" means either by defining
  237.  * _DEFAULT_SOURCE, or by not defining any of the public feature test macros.
  238.  * Defining _GNU_SOURCE makes all of the above avaliable.
  239.  */
  240.  
  241. #ifdef _ATFILE_SOURCE
  242. #define __ATFILE_VISIBLE        1
  243. #else
  244. #define __ATFILE_VISIBLE        0
  245. #endif
  246.  
  247. #ifdef _DEFAULT_SOURCE
  248. #define __BSD_VISIBLE           1
  249. #else
  250. #define __BSD_VISIBLE           0
  251. #endif
  252.  
  253. #ifdef _GNU_SOURCE
  254. #define __GNU_VISIBLE           1
  255. #else
  256. #define __GNU_VISIBLE           0
  257. #endif
  258.  
  259. #if defined(_ISOC11_SOURCE) || \
  260.   (__STDC_VERSION__ - 0) >= 201112L || (__cplusplus - 0) >= 201103L
  261. #define __ISO_C_VISIBLE         2011
  262. #elif defined(_ISOC99_SOURCE) || (_POSIX_C_SOURCE - 0) >= 200112L || \
  263.   (__STDC_VERSION__ - 0) >= 199901L || defined(__cplusplus)
  264. #define __ISO_C_VISIBLE         1999
  265. #else
  266. #define __ISO_C_VISIBLE         1990
  267. #endif
  268.  
  269. #if defined(_LARGEFILE_SOURCE) || (_XOPEN_SOURCE - 0) >= 500
  270. #define __LARGEFILE_VISIBLE     1
  271. #else
  272. #define __LARGEFILE_VISIBLE     0
  273. #endif
  274.  
  275. #ifdef _DEFAULT_SOURCE
  276. #define __MISC_VISIBLE          1
  277. #else
  278. #define __MISC_VISIBLE          0
  279. #endif
  280.  
  281. #if (_POSIX_C_SOURCE - 0) >= 200809L
  282. #define __POSIX_VISIBLE         200809
  283. #elif (_POSIX_C_SOURCE - 0) >= 200112L
  284. #define __POSIX_VISIBLE         200112
  285. #elif (_POSIX_C_SOURCE - 0) >= 199506L
  286. #define __POSIX_VISIBLE         199506
  287. #elif (_POSIX_C_SOURCE - 0) >= 199309L
  288. #define __POSIX_VISIBLE         199309
  289. #elif (_POSIX_C_SOURCE - 0) >= 2 || defined(_XOPEN_SOURCE)
  290. #define __POSIX_VISIBLE         199209
  291. #elif defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE)
  292. #define __POSIX_VISIBLE         199009
  293. #else
  294. #define __POSIX_VISIBLE         0
  295. #endif
  296.  
  297. #ifdef _DEFAULT_SOURCE
  298. #define __SVID_VISIBLE          1
  299. #else
  300. #define __SVID_VISIBLE          0
  301. #endif
  302.  
  303. #if (_XOPEN_SOURCE - 0) >= 700
  304. #define __XSI_VISIBLE           700
  305. #elif (_XOPEN_SOURCE - 0) >= 600
  306. #define __XSI_VISIBLE           600
  307. #elif (_XOPEN_SOURCE - 0) >= 500
  308. #define __XSI_VISIBLE           500
  309. #elif defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)
  310. #define __XSI_VISIBLE           4
  311. #elif defined(_XOPEN_SOURCE)
  312. #define __XSI_VISIBLE           1
  313. #else
  314. #define __XSI_VISIBLE           0
  315. #endif
  316.  
  317. /* RTEMS adheres to POSIX -- 1003.1b with some features from annexes.  */
  318.  
  319. #ifdef __rtems__
  320. #define _POSIX_JOB_CONTROL              1
  321. #define _POSIX_SAVED_IDS                1
  322. #define _POSIX_VERSION                  199309L
  323. #define _POSIX_ASYNCHRONOUS_IO          1
  324. #define _POSIX_FSYNC                    1
  325. #define _POSIX_MAPPED_FILES             1
  326. #define _POSIX_MEMLOCK                  1
  327. #define _POSIX_MEMLOCK_RANGE            1
  328. #define _POSIX_MEMORY_PROTECTION        1
  329. #define _POSIX_MESSAGE_PASSING          1
  330. #define _POSIX_MONOTONIC_CLOCK          200112L
  331. #define _POSIX_PRIORITIZED_IO           1
  332. #define _POSIX_PRIORITY_SCHEDULING      1
  333. #define _POSIX_REALTIME_SIGNALS         1
  334. #define _POSIX_SEMAPHORES               1
  335. /* #define _POSIX_SHARED_MEMORY_OBJECTS 1 */
  336. #define _POSIX_SYNCHRONIZED_IO          1
  337. #define _POSIX_TIMERS                   1
  338. #define _POSIX_BARRIERS                 200112L
  339. #define _POSIX_READER_WRITER_LOCKS      200112L
  340. #define _POSIX_SPIN_LOCKS               200112L
  341.  
  342.  
  343. /* In P1003.1b but defined by drafts at least as early as P1003.1c/D10  */
  344. #define _POSIX_THREADS                          1
  345. #define _POSIX_THREAD_ATTR_STACKADDR            1
  346. #define _POSIX_THREAD_ATTR_STACKSIZE            1
  347. #define _POSIX_THREAD_PRIORITY_SCHEDULING       1
  348. #define _POSIX_THREAD_PRIO_INHERIT              1
  349. #define _POSIX_THREAD_PRIO_PROTECT              1
  350. #define _POSIX_THREAD_PROCESS_SHARED            1
  351. #define _POSIX_THREAD_SAFE_FUNCTIONS            1
  352.  
  353. /* P1003.4b/D8 defines the constants below this comment. */
  354. #define _POSIX_SPAWN                            1
  355. #define _POSIX_TIMEOUTS                         1
  356. #define _POSIX_CPUTIME                          1
  357. #define _POSIX_THREAD_CPUTIME                   1
  358. #define _POSIX_SPORADIC_SERVER                  1
  359. #define _POSIX_THREAD_SPORADIC_SERVER           1
  360. #define _POSIX_DEVICE_CONTROL                   1
  361. #define _POSIX_DEVCTL_DIRECTION                 1
  362. #define _POSIX_INTERRUPT_CONTROL                1
  363. #define _POSIX_ADVISORY_INFO                    1
  364.  
  365. /* UNIX98 added some new pthread mutex attributes */
  366. #define _UNIX98_THREAD_MUTEX_ATTRIBUTES         1
  367.  
  368. #endif
  369.  
  370. /* XMK loosely adheres to POSIX -- 1003.1 */
  371. #ifdef __XMK__
  372. #define _POSIX_THREADS                          1
  373. #define _POSIX_THREAD_PRIORITY_SCHEDULING       1
  374. #endif
  375.  
  376.  
  377. #ifdef __svr4__
  378. # define _POSIX_JOB_CONTROL     1
  379. # define _POSIX_SAVED_IDS       1
  380. # define _POSIX_VERSION 199009L
  381. #endif
  382.  
  383. #ifdef __CYGWIN__
  384.  
  385. #if !defined(__STRICT_ANSI__) || defined(__cplusplus) || __STDC_VERSION__ >= 199901L
  386. #define _POSIX_VERSION                          200809L
  387. #define _POSIX2_VERSION                         200809L
  388. #define _XOPEN_VERSION                             600
  389.  
  390. #define _POSIX_ADVISORY_INFO                    200809L
  391. /* #define _POSIX_ASYNCHRONOUS_IO                   -1 */
  392. #define _POSIX_BARRIERS                         200809L
  393. #define _POSIX_CHOWN_RESTRICTED                      1
  394. #define _POSIX_CLOCK_SELECTION                  200809L
  395. #define _POSIX_CPUTIME                          200809L
  396. #define _POSIX_FSYNC                            200809L
  397. #define _POSIX_IPV6                             200809L
  398. #define _POSIX_JOB_CONTROL                           1
  399. #define _POSIX_MAPPED_FILES                     200809L
  400. /* #define _POSIX_MEMLOCK                           -1 */
  401. #define _POSIX_MEMLOCK_RANGE                    200809L
  402. #define _POSIX_MEMORY_PROTECTION                200809L
  403. #define _POSIX_MESSAGE_PASSING                  200809L
  404. #define _POSIX_MONOTONIC_CLOCK                  200809L
  405. #define _POSIX_NO_TRUNC                              1
  406. /* #define _POSIX_PRIORITIZED_IO                    -1 */
  407. #define _POSIX_PRIORITY_SCHEDULING              200809L
  408. #define _POSIX_RAW_SOCKETS                      200809L
  409. #define _POSIX_READER_WRITER_LOCKS              200809L
  410. #define _POSIX_REALTIME_SIGNALS                 200809L
  411. #define _POSIX_REGEXP                                1
  412. #define _POSIX_SAVED_IDS                             1
  413. #define _POSIX_SEMAPHORES                       200809L
  414. #define _POSIX_SHARED_MEMORY_OBJECTS            200809L
  415. #define _POSIX_SHELL                                 1
  416. #define _POSIX_SPAWN                            200809L
  417. #define _POSIX_SPIN_LOCKS                       200809L
  418. /* #define _POSIX_SPORADIC_SERVER                   -1 */
  419. #define _POSIX_SYNCHRONIZED_IO                  200809L
  420. #define _POSIX_THREAD_ATTR_STACKADDR            200809L
  421. #define _POSIX_THREAD_ATTR_STACKSIZE            200809L
  422. #define _POSIX_THREAD_CPUTIME                   200809L
  423. /* #define _POSIX_THREAD_PRIO_INHERIT               -1 */
  424. /* #define _POSIX_THREAD_PRIO_PROTECT               -1 */
  425. #define _POSIX_THREAD_PRIORITY_SCHEDULING       200809L
  426. #define _POSIX_THREAD_PROCESS_SHARED            200809L
  427. #define _POSIX_THREAD_SAFE_FUNCTIONS            200809L
  428. /* #define _POSIX_THREAD_SPORADIC_SERVER            -1 */
  429. #define _POSIX_THREADS                          200809L
  430. /* #define _POSIX_TIMEOUTS                          -1 */
  431. #define _POSIX_TIMERS                                1
  432. /* #define _POSIX_TRACE                             -1 */
  433. /* #define _POSIX_TRACE_EVENT_FILTER                -1 */
  434. /* #define _POSIX_TRACE_INHERIT                     -1 */
  435. /* #define _POSIX_TRACE_LOG                         -1 */
  436. /* #define _POSIX_TYPED_MEMORY_OBJECTS              -1 */
  437. #define _POSIX_VDISABLE                            '\0'
  438. #define _POSIX2_C_BIND                          200809L
  439. #define _POSIX2_C_DEV                           200809L
  440. #define _POSIX2_CHAR_TERM                       200809L
  441. /* #define _POSIX2_FORT_DEV                         -1 */
  442. /* #define _POSIX2_FORT_RUN                         -1 */
  443. /* #define _POSIX2_LOCALEDEF                        -1 */
  444. /* #define _POSIX2_PBS                              -1 */
  445. /* #define _POSIX2_PBS_ACCOUNTING                   -1 */
  446. /* #define _POSIX2_PBS_CHECKPOINT                   -1 */
  447. /* #define _POSIX2_PBS_LOCATE                       -1 */
  448. /* #define _POSIX2_PBS_MESSAGE                      -1 */
  449. /* #define _POSIX2_PBS_TRACK                        -1 */
  450. #define _POSIX2_SW_DEV                          200809L
  451. #define _POSIX2_UPE                             200809L
  452. #define _POSIX_V6_ILP32_OFF32                       -1
  453. #ifdef __LP64__
  454. #define _POSIX_V6_ILP32_OFFBIG                      -1
  455. #define _POSIX_V6_LP64_OFF64                         1
  456. #define _POSIX_V6_LPBIG_OFFBIG                       1
  457. #else
  458. #define _POSIX_V6_ILP32_OFFBIG                       1
  459. #define _POSIX_V6_LP64_OFF64                        -1
  460. #define _POSIX_V6_LPBIG_OFFBIG                      -1
  461. #endif
  462. #define _XBS5_ILP32_OFF32                       _POSIX_V6_ILP32_OFF32
  463. #define _XBS5_ILP32_OFFBIG                      _POSIX_V6_ILP32_OFFBIG
  464. #define _XBS5_LP64_OFF64                        _POSIX_V6_LP64_OFF64
  465. #define _XBS5_LPBIG_OFFBIG                      _POSIX_V6_LPBIG_OFFBIG
  466. #define _XOPEN_CRYPT                                 1
  467. #define _XOPEN_ENH_I18N                              1
  468. /* #define _XOPEN_LEGACY                            -1 */
  469. /* #define _XOPEN_REALTIME                          -1 */
  470. /* #define _XOPEN_REALTIME_THREADS                  -1 */
  471. #define _XOPEN_SHM                                   1
  472. /* #define _XOPEN_STREAMS                           -1 */
  473. /* #define _XOPEN_UNIX                              -1 */
  474.  
  475. #endif /* !__STRICT_ANSI__ || __cplusplus || __STDC_VERSION__ >= 199901L */
  476.  
  477. /* The value corresponds to UNICODE version 4.0, which is the version
  478.    supported by XP.  Newlib supports 5.2 (2011) but so far Cygwin needs
  479.    the MS conversions for double-byte charsets. */
  480. #define __STDC_ISO_10646__ 200305L
  481.  
  482. #endif /* __CYGWIN__ */
  483.  
  484. #ifdef __cplusplus
  485. }
  486. #endif
  487. #endif /* _SYS_FEATURES_H */
  488.