FreeBSD/Linux Kernel Cross Reference
sys/sys/cdefs.h
1 /*-
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Berkeley Software Design, Inc.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)cdefs.h 8.8 (Berkeley) 1/9/95
33 * $FreeBSD: releng/8.1/sys/sys/cdefs.h 199583 2009-11-20 15:27:52Z jhb $
34 */
35
36 #ifndef _SYS_CDEFS_H_
37 #define _SYS_CDEFS_H_
38
39 #if defined(__cplusplus)
40 #define __BEGIN_DECLS extern "C" {
41 #define __END_DECLS }
42 #else
43 #define __BEGIN_DECLS
44 #define __END_DECLS
45 #endif
46
47 /*
48 * This code has been put in place to help reduce the addition of
49 * compiler specific defines in FreeBSD code. It helps to aid in
50 * having a compiler-agnostic source tree.
51 */
52
53 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
54
55 #if __GNUC__ >= 3 || defined(__INTEL_COMPILER)
56 #define __GNUCLIKE_ASM 3
57 #define __GNUCLIKE_MATH_BUILTIN_CONSTANTS
58 #else
59 #define __GNUCLIKE_ASM 2
60 #endif
61 #define __GNUCLIKE___TYPEOF 1
62 #define __GNUCLIKE___OFFSETOF 1
63 #define __GNUCLIKE___SECTION 1
64
65 #define __GNUCLIKE_ATTRIBUTE_MODE_DI 1
66
67 #ifndef __INTEL_COMPILER
68 # define __GNUCLIKE_CTOR_SECTION_HANDLING 1
69 #endif
70
71 #define __GNUCLIKE_BUILTIN_CONSTANT_P 1
72 # if defined(__INTEL_COMPILER) && defined(__cplusplus) \
73 && __INTEL_COMPILER < 800
74 # undef __GNUCLIKE_BUILTIN_CONSTANT_P
75 # endif
76
77 #if (__GNUC_MINOR__ > 95 || __GNUC__ >= 3) && !defined(__INTEL_COMPILER)
78 # define __GNUCLIKE_BUILTIN_VARARGS 1
79 # define __GNUCLIKE_BUILTIN_STDARG 1
80 # define __GNUCLIKE_BUILTIN_VAALIST 1
81 #endif
82
83 #if defined(__GNUC__)
84 # define __GNUC_VA_LIST_COMPATIBILITY 1
85 #endif
86
87 #ifndef __INTEL_COMPILER
88 # define __GNUCLIKE_BUILTIN_NEXT_ARG 1
89 # define __GNUCLIKE_MATH_BUILTIN_RELOPS
90 #endif
91
92 #define __GNUCLIKE_BUILTIN_MEMCPY 1
93
94 /* XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced */
95 #define __CC_SUPPORTS_INLINE 1
96 #define __CC_SUPPORTS___INLINE 1
97 #define __CC_SUPPORTS___INLINE__ 1
98
99 #define __CC_SUPPORTS___FUNC__ 1
100 #define __CC_SUPPORTS_WARNING 1
101
102 #define __CC_SUPPORTS_VARADIC_XXX 1 /* see varargs.h */
103
104 #define __CC_SUPPORTS_DYNAMIC_ARRAY_INIT 1
105
106 #endif /* __GNUC__ || __INTEL_COMPILER */
107
108 /*
109 * Macro to test if we're using a specific version of gcc or later.
110 */
111 #if defined(__GNUC__) && !defined(__INTEL_COMPILER)
112 #define __GNUC_PREREQ__(ma, mi) \
113 (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi))
114 #else
115 #define __GNUC_PREREQ__(ma, mi) 0
116 #endif
117
118 /*
119 * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
120 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
121 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
122 * mode -- there must be no spaces between its arguments, and for nested
123 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also
124 * concatenate double-quoted strings produced by the __STRING macro, but
125 * this only works with ANSI C.
126 *
127 * __XSTRING is like __STRING, but it expands any macros in its argument
128 * first. It is only available with ANSI C.
129 */
130 #if defined(__STDC__) || defined(__cplusplus)
131 #define __P(protos) protos /* full-blown ANSI C */
132 #define __CONCAT1(x,y) x ## y
133 #define __CONCAT(x,y) __CONCAT1(x,y)
134 #define __STRING(x) #x /* stringify without expanding x */
135 #define __XSTRING(x) __STRING(x) /* expand x, then stringify */
136
137 #define __const const /* define reserved names to standard */
138 #define __signed signed
139 #define __volatile volatile
140 #if defined(__cplusplus)
141 #define __inline inline /* convert to C++ keyword */
142 #else
143 #if !(defined(__CC_SUPPORTS___INLINE))
144 #define __inline /* delete GCC keyword */
145 #endif /* ! __CC_SUPPORTS___INLINE */
146 #endif /* !__cplusplus */
147
148 #else /* !(__STDC__ || __cplusplus) */
149 #define __P(protos) () /* traditional C preprocessor */
150 #define __CONCAT(x,y) x/**/y
151 #define __STRING(x) "x"
152
153 #if !defined(__CC_SUPPORTS___INLINE)
154 #define __const /* delete pseudo-ANSI C keywords */
155 #define __inline
156 #define __signed
157 #define __volatile
158 /*
159 * In non-ANSI C environments, new programs will want ANSI-only C keywords
160 * deleted from the program and old programs will want them left alone.
161 * When using a compiler other than gcc, programs using the ANSI C keywords
162 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
163 * When using "gcc -traditional", we assume that this is the intent; if
164 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
165 */
166 #ifndef NO_ANSI_KEYWORDS
167 #define const /* delete ANSI C keywords */
168 #define inline
169 #define signed
170 #define volatile
171 #endif /* !NO_ANSI_KEYWORDS */
172 #endif /* !__CC_SUPPORTS___INLINE */
173 #endif /* !(__STDC__ || __cplusplus) */
174
175 /*
176 * Compiler-dependent macros to help declare dead (non-returning) and
177 * pure (no side effects) functions, and unused variables. They are
178 * null except for versions of gcc that are known to support the features
179 * properly (old versions of gcc-2 supported the dead and pure features
180 * in a different (wrong) way). If we do not provide an implementation
181 * for a given compiler, let the compile fail if it is told to use
182 * a feature that we cannot live without.
183 */
184 #ifdef lint
185 #define __dead2
186 #define __pure2
187 #define __unused
188 #define __packed
189 #define __aligned(x)
190 #define __section(x)
191 #else
192 #if !__GNUC_PREREQ__(2, 5) && !defined(__INTEL_COMPILER)
193 #define __dead2
194 #define __pure2
195 #define __unused
196 #endif
197 #if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7 && !defined(__INTEL_COMPILER)
198 #define __dead2 __attribute__((__noreturn__))
199 #define __pure2 __attribute__((__const__))
200 #define __unused
201 /* XXX Find out what to do for __packed, __aligned and __section */
202 #endif
203 #if __GNUC_PREREQ__(2, 7)
204 #define __dead2 __attribute__((__noreturn__))
205 #define __pure2 __attribute__((__const__))
206 #define __unused __attribute__((__unused__))
207 #define __used __attribute__((__used__))
208 #define __packed __attribute__((__packed__))
209 #define __aligned(x) __attribute__((__aligned__(x)))
210 #define __section(x) __attribute__((__section__(x)))
211 #endif
212 #if defined(__INTEL_COMPILER)
213 #define __dead2 __attribute__((__noreturn__))
214 #define __pure2 __attribute__((__const__))
215 #define __unused __attribute__((__unused__))
216 #define __used __attribute__((__used__))
217 #define __packed __attribute__((__packed__))
218 #define __aligned(x) __attribute__((__aligned__(x)))
219 #define __section(x) __attribute__((__section__(x)))
220 #endif
221 #endif
222
223 #if __GNUC_PREREQ__(2, 96)
224 #define __malloc_like __attribute__((__malloc__))
225 #define __pure __attribute__((__pure__))
226 #else
227 #define __malloc_like
228 #define __pure
229 #endif
230
231 #if __GNUC_PREREQ__(3, 1) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800)
232 #define __always_inline __attribute__((__always_inline__))
233 #else
234 #define __always_inline
235 #endif
236
237 #if __GNUC_PREREQ__(4, 2) /* actually 4.1.3 */
238 #define __gnu89_inline __attribute__((__gnu_inline__)) __inline
239 #else
240 #define __gnu89_inline
241 #endif
242
243 #if __GNUC_PREREQ__(3, 1)
244 #define __noinline __attribute__ ((__noinline__))
245 #else
246 #define __noinline
247 #endif
248
249 #if __GNUC_PREREQ__(3, 3)
250 #define __nonnull(x) __attribute__((__nonnull__(x)))
251 #else
252 #define __nonnull(x)
253 #endif
254
255 /* XXX: should use `#if __STDC_VERSION__ < 199901'. */
256 #if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER)
257 #define __func__ NULL
258 #endif
259
260 #if (defined(__INTEL_COMPILER) || (defined(__GNUC__) && __GNUC__ >= 2)) && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
261 #define __LONG_LONG_SUPPORTED
262 #endif
263
264 /*
265 * GCC 2.95 provides `__restrict' as an extension to C90 to support the
266 * C99-specific `restrict' type qualifier. We happen to use `__restrict' as
267 * a way to define the `restrict' type qualifier without disturbing older
268 * software that is unaware of C99 keywords.
269 */
270 #if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)
271 #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901 || defined(lint)
272 #define __restrict
273 #else
274 #define __restrict restrict
275 #endif
276 #endif
277
278 /*
279 * GNU C version 2.96 adds explicit branch prediction so that
280 * the CPU back-end can hint the processor and also so that
281 * code blocks can be reordered such that the predicted path
282 * sees a more linear flow, thus improving cache behavior, etc.
283 *
284 * The following two macros provide us with a way to utilize this
285 * compiler feature. Use __predict_true() if you expect the expression
286 * to evaluate to true, and __predict_false() if you expect the
287 * expression to evaluate to false.
288 *
289 * A few notes about usage:
290 *
291 * * Generally, __predict_false() error condition checks (unless
292 * you have some _strong_ reason to do otherwise, in which case
293 * document it), and/or __predict_true() `no-error' condition
294 * checks, assuming you want to optimize for the no-error case.
295 *
296 * * Other than that, if you don't know the likelihood of a test
297 * succeeding from empirical or other `hard' evidence, don't
298 * make predictions.
299 *
300 * * These are meant to be used in places that are run `a lot'.
301 * It is wasteful to make predictions in code that is run
302 * seldomly (e.g. at subsystem initialization time) as the
303 * basic block reordering that this affects can often generate
304 * larger code.
305 */
306 #if __GNUC_PREREQ__(2, 96)
307 #define __predict_true(exp) __builtin_expect((exp), 1)
308 #define __predict_false(exp) __builtin_expect((exp), 0)
309 #else
310 #define __predict_true(exp) (exp)
311 #define __predict_false(exp) (exp)
312 #endif
313
314 /*
315 * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
316 * require it.
317 */
318 #if __GNUC_PREREQ__(4, 1)
319 #define __offsetof(type, field) __builtin_offsetof(type, field)
320 #else
321 #ifndef __cplusplus
322 #define __offsetof(type, field) ((size_t)(&((type *)0)->field))
323 #else
324 #define __offsetof(type, field) \
325 (__offsetof__ (reinterpret_cast <size_t> \
326 (&reinterpret_cast <const volatile char &> \
327 (static_cast<type *> (0)->field))))
328 #endif
329 #endif
330 #define __rangeof(type, start, end) \
331 (__offsetof(type, end) - __offsetof(type, start))
332
333 /*
334 * Compiler-dependent macros to declare that functions take printf-like
335 * or scanf-like arguments. They are null except for versions of gcc
336 * that are known to support the features properly (old versions of gcc-2
337 * didn't permit keeping the keywords out of the application namespace).
338 */
339 #if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER)
340 #define __printflike(fmtarg, firstvararg)
341 #define __scanflike(fmtarg, firstvararg)
342 #define __format_arg(fmtarg)
343 #else
344 #define __printflike(fmtarg, firstvararg) \
345 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
346 #define __scanflike(fmtarg, firstvararg) \
347 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
348 #define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg)))
349 #endif
350
351 /* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
352 #if __FreeBSD_cc_version >= 300001 && defined(__GNUC__) && !defined(__INTEL_COMPILER)
353 #define __printf0like(fmtarg, firstvararg) \
354 __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
355 #else
356 #define __printf0like(fmtarg, firstvararg)
357 #endif
358
359 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
360 #ifndef __INTEL_COMPILER
361 #define __strong_reference(sym,aliassym) \
362 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)))
363 #endif
364 #ifdef __STDC__
365 #define __weak_reference(sym,alias) \
366 __asm__(".weak " #alias); \
367 __asm__(".equ " #alias ", " #sym)
368 #define __warn_references(sym,msg) \
369 __asm__(".section .gnu.warning." #sym); \
370 __asm__(".asciz \"" msg "\""); \
371 __asm__(".previous")
372 #define __sym_compat(sym,impl,verid) \
373 __asm__(".symver " #impl ", " #sym "@" #verid)
374 #define __sym_default(sym,impl,verid) \
375 __asm__(".symver " #impl ", " #sym "@@" #verid)
376 #else
377 #define __weak_reference(sym,alias) \
378 __asm__(".weak alias"); \
379 __asm__(".equ alias, sym")
380 #define __warn_references(sym,msg) \
381 __asm__(".section .gnu.warning.sym"); \
382 __asm__(".asciz \"msg\""); \
383 __asm__(".previous")
384 #define __sym_compat(sym,impl,verid) \
385 __asm__(".symver impl, sym@verid")
386 #define __sym_default(impl,sym,verid) \
387 __asm__(".symver impl, sym@@verid")
388 #endif /* __STDC__ */
389 #endif /* __GNUC__ || __INTEL_COMPILER */
390
391 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
392 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
393 #else
394 /*
395 * The following definition might not work well if used in header files,
396 * but it should be better than nothing. If you want a "do nothing"
397 * version, then it should generate some harmless declaration, such as:
398 * #define __IDSTRING(name,string) struct __hack
399 */
400 #define __IDSTRING(name,string) static const char name[] __unused = string
401 #endif
402
403 /*
404 * Embed the rcs id of a source file in the resulting library. Note that in
405 * more recent ELF binutils, we use .ident allowing the ID to be stripped.
406 * Usage:
407 * __FBSDID("$FreeBSD: releng/8.1/sys/sys/cdefs.h 199583 2009-11-20 15:27:52Z jhb $");
408 */
409 #ifndef __FBSDID
410 #if !defined(lint) && !defined(STRIP_FBSDID)
411 #define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
412 #else
413 #define __FBSDID(s) struct __hack
414 #endif
415 #endif
416
417 #ifndef __RCSID
418 #ifndef NO__RCSID
419 #define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
420 #else
421 #define __RCSID(s) struct __hack
422 #endif
423 #endif
424
425 #ifndef __RCSID_SOURCE
426 #ifndef NO__RCSID_SOURCE
427 #define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s)
428 #else
429 #define __RCSID_SOURCE(s) struct __hack
430 #endif
431 #endif
432
433 #ifndef __SCCSID
434 #ifndef NO__SCCSID
435 #define __SCCSID(s) __IDSTRING(__CONCAT(__sccsid_,__LINE__),s)
436 #else
437 #define __SCCSID(s) struct __hack
438 #endif
439 #endif
440
441 #ifndef __COPYRIGHT
442 #ifndef NO__COPYRIGHT
443 #define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s)
444 #else
445 #define __COPYRIGHT(s) struct __hack
446 #endif
447 #endif
448
449 #ifndef __DECONST
450 #define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var))
451 #endif
452
453 #ifndef __DEVOLATILE
454 #define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var))
455 #endif
456
457 #ifndef __DEQUALIFY
458 #define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var))
459 #endif
460
461 /*-
462 * The following definitions are an extension of the behavior originally
463 * implemented in <sys/_posix.h>, but with a different level of granularity.
464 * POSIX.1 requires that the macros we test be defined before any standard
465 * header file is included.
466 *
467 * Here's a quick run-down of the versions:
468 * defined(_POSIX_SOURCE) 1003.1-1988
469 * _POSIX_C_SOURCE == 1 1003.1-1990
470 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option
471 * _POSIX_C_SOURCE == 199309 1003.1b-1993
472 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995,
473 * and the omnibus ISO/IEC 9945-1: 1996
474 * _POSIX_C_SOURCE == 200112 1003.1-2001
475 * _POSIX_C_SOURCE == 200809 1003.1-2008
476 *
477 * In addition, the X/Open Portability Guide, which is now the Single UNIX
478 * Specification, defines a feature-test macro which indicates the version of
479 * that specification, and which subsumes _POSIX_C_SOURCE.
480 *
481 * Our macros begin with two underscores to avoid namespace screwage.
482 */
483
484 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
485 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1
486 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */
487 #define _POSIX_C_SOURCE 199009
488 #endif
489
490 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
491 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2
492 #undef _POSIX_C_SOURCE
493 #define _POSIX_C_SOURCE 199209
494 #endif
495
496 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */
497 #ifdef _XOPEN_SOURCE
498 #if _XOPEN_SOURCE - 0 >= 700
499 #define __XSI_VISIBLE 700
500 #undef _POSIX_C_SOURCE
501 #define _POSIX_C_SOURCE 200809
502 #elif _XOPEN_SOURCE - 0 >= 600
503 #define __XSI_VISIBLE 600
504 #undef _POSIX_C_SOURCE
505 #define _POSIX_C_SOURCE 200112
506 #elif _XOPEN_SOURCE - 0 >= 500
507 #define __XSI_VISIBLE 500
508 #undef _POSIX_C_SOURCE
509 #define _POSIX_C_SOURCE 199506
510 #endif
511 #endif
512
513 /*
514 * Deal with all versions of POSIX. The ordering relative to the tests above is
515 * important.
516 */
517 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
518 #define _POSIX_C_SOURCE 198808
519 #endif
520 #ifdef _POSIX_C_SOURCE
521 #if _POSIX_C_SOURCE >= 200809
522 #define __POSIX_VISIBLE 200809
523 #define __ISO_C_VISIBLE 1999
524 #elif _POSIX_C_SOURCE >= 200112
525 #define __POSIX_VISIBLE 200112
526 #define __ISO_C_VISIBLE 1999
527 #elif _POSIX_C_SOURCE >= 199506
528 #define __POSIX_VISIBLE 199506
529 #define __ISO_C_VISIBLE 1990
530 #elif _POSIX_C_SOURCE >= 199309
531 #define __POSIX_VISIBLE 199309
532 #define __ISO_C_VISIBLE 1990
533 #elif _POSIX_C_SOURCE >= 199209
534 #define __POSIX_VISIBLE 199209
535 #define __ISO_C_VISIBLE 1990
536 #elif _POSIX_C_SOURCE >= 199009
537 #define __POSIX_VISIBLE 199009
538 #define __ISO_C_VISIBLE 1990
539 #else
540 #define __POSIX_VISIBLE 198808
541 #define __ISO_C_VISIBLE 0
542 #endif /* _POSIX_C_SOURCE */
543 #else
544 /*-
545 * Deal with _ANSI_SOURCE:
546 * If it is defined, and no other compilation environment is explicitly
547 * requested, then define our internal feature-test macros to zero. This
548 * makes no difference to the preprocessor (undefined symbols in preprocessing
549 * expressions are defined to have value zero), but makes it more convenient for
550 * a test program to print out the values.
551 *
552 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
553 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
554 * environment (and in fact we will never get here).
555 */
556 #if defined(_ANSI_SOURCE) /* Hide almost everything. */
557 #define __POSIX_VISIBLE 0
558 #define __XSI_VISIBLE 0
559 #define __BSD_VISIBLE 0
560 #define __ISO_C_VISIBLE 1990
561 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */
562 #define __POSIX_VISIBLE 0
563 #define __XSI_VISIBLE 0
564 #define __BSD_VISIBLE 0
565 #define __ISO_C_VISIBLE 1999
566 #else /* Default environment: show everything. */
567 #define __POSIX_VISIBLE 200809
568 #define __XSI_VISIBLE 700
569 #define __BSD_VISIBLE 1
570 #define __ISO_C_VISIBLE 1999
571 #endif
572 #endif
573
574 #endif /* !_SYS_CDEFS_H_ */
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