Remove <sys/_posix.h>. It serves no purpose anymore.
[dragonfly.git] / sys / sys / cdefs.h
CommitLineData
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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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)cdefs.h 8.8 (Berkeley) 1/9/95
37 * $FreeBSD: src/sys/sys/cdefs.h,v 1.28.2.8 2002/09/18 04:05:13 mikeh Exp $
38 */
39
40#ifndef _SYS_CDEFS_H_
41#define _SYS_CDEFS_H_
42
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43/*
44 * Testing against Clang-specific extensions.
45 */
46
47#ifndef __has_extension
48#define __has_extension __has_feature
49#endif
50#ifndef __has_feature
51#define __has_feature(x) 0
52#endif
53#ifndef __has_include
54#define __has_include(x) 0
55#endif
56#ifndef __has_builtin
57#define __has_builtin(x) 0
58#endif
59
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60/*
61 * Macro to test if we are using a specific version of gcc or later.
62 */
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63#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
64#define __GNUC_PREREQ__(ma, mi) \
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65 (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi))
66#else
43c9ef94 67#define __GNUC_PREREQ__(ma, mi) 0
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68#endif
69
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70#if defined(__cplusplus)
71#if __GNUC_PREREQ__(4, 0)
72#define __BEGIN_DECLS _Pragma("GCC visibility push(default)") extern "C" {
73#define __END_DECLS } _Pragma("GCC visibility pop")
74#else
75#define __BEGIN_DECLS extern "C" {
76#define __END_DECLS }
77#endif
78#else
79#define __BEGIN_DECLS
80#define __END_DECLS
81#endif
82
f754816e 83/*
d9abbdda 84 * The __VM_CACHELINE_SIZE macro defines the common cache line alignment
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85 * size that can be found across most recent and somewhat latest Intel
86 * hardware, i.e. L1 cache sizes etc.
87 *
88 * If needed, this value can be TUNED. Suitable values for this macro
89 * are 32, 64 and 128 bytes. The unit of measurement for this macro is
90 * bytes.
91 *
92 * XXX: This macro and related macros will eventually move to a MD
93 * header, but currently, we do need such a hierarchy.
94 */
ddca1582 95#define __VM_CACHELINE_SIZE 64
583f14fd 96#define __VM_CACHELINE_MASK (__VM_CACHELINE_SIZE - 1)
ddca1582 97#define __VM_CACHELINE_ALIGN(n) \
583f14fd 98 (((n) + __VM_CACHELINE_MASK) & ~__VM_CACHELINE_MASK)
f754816e 99
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100/*
101 * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
102 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
103 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
104 * mode -- there must be no spaces between its arguments, and for nested
105 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also
106 * concatenate double-quoted strings produced by the __STRING macro, but
107 * this only works with ANSI C.
108 *
109 * __XSTRING is like __STRING, but it expands any macros in its argument
110 * first. It is only available with ANSI C.
111 */
112#if defined(__STDC__) || defined(__cplusplus)
113#define __P(protos) protos /* full-blown ANSI C */
114#define __CONCAT1(x,y) x ## y
115#define __CONCAT(x,y) __CONCAT1(x,y)
116#define __STRING(x) #x /* stringify without expanding x */
117#define __XSTRING(x) __STRING(x) /* expand x, then stringify */
118
119#define __const const /* define reserved names to standard */
120#define __signed signed
121#define __volatile volatile
122#if defined(__cplusplus)
123#define __inline inline /* convert to C++ keyword */
124#else
125#ifndef __GNUC__
126#define __inline /* delete GCC keyword */
127#endif /* !__GNUC__ */
128#endif /* !__cplusplus */
129
130#else /* !(__STDC__ || __cplusplus) */
131#define __P(protos) () /* traditional C preprocessor */
132#define __CONCAT(x,y) x/**/y
133#define __STRING(x) "x"
134
135#ifndef __GNUC__
136#define __const /* delete pseudo-ANSI C keywords */
137#define __inline
138#define __signed
139#define __volatile
140/*
141 * In non-ANSI C environments, new programs will want ANSI-only C keywords
142 * deleted from the program and old programs will want them left alone.
143 * When using a compiler other than gcc, programs using the ANSI C keywords
144 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
145 * When using "gcc -traditional", we assume that this is the intent; if
146 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
147 */
148#ifndef NO_ANSI_KEYWORDS
149#define const /* delete ANSI C keywords */
150#define inline
151#define signed
152#define volatile
153#endif /* !NO_ANSI_KEYWORDS */
154#endif /* !__GNUC__ */
155#endif /* !(__STDC__ || __cplusplus) */
156
157/*
158 * Compiler-dependent macros to help declare dead (non-returning) and
159 * pure (no side effects) functions, and unused variables. They are
160 * null except for versions of gcc that are known to support the features
161 * properly (old versions of gcc-2 supported the dead and pure features
162 * in a different (wrong) way).
163 */
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164#ifdef lint
165
166#define __dead2
ceb0d0c4 167#define __pure
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168#define __pure2
169#define __unused
170#define __packed
171#define __aligned(x)
172#define __section(x)
173#define __always_inline
174#define __nonnull(x)
960a52dd 175#define __heedresult
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176
177#else
178
3d28a533 179#if !__GNUC_PREREQ__(2, 7)
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180#define __dead2
181#define __pure2
182#define __unused
183#endif
dc62b251 184
dc62b251 185#if __GNUC_PREREQ__(2, 7)
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186#define __dead2 __attribute__((__noreturn__))
187#define __pure2 __attribute__((__const__))
188#define __unused __attribute__((__unused__))
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189#define __packed __attribute__((__packed__))
190#define __aligned(x) __attribute__((__aligned__(x)))
191#define __section(x) __attribute__((__section__(x)))
192#endif
193
74c78f9b 194#if __GNUC_PREREQ__(2, 96)
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195#define __pure __attribute__((__pure__))
196#else
197#define __pure __pure2
198#endif
199
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200#if __GNUC_PREREQ__(3, 1)
201#define __always_inline __attribute__((__always_inline__))
e0f95098 202#define __noinline __attribute__((__noinline__))
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203#else
204#define __always_inline
e0f95098 205#define __noinline
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206#endif
207
208#if __GNUC_PREREQ__(3, 3)
960a52dd 209#define __heedresult __attribute__((__warn_unused_result__))
dc62b251 210#define __nonnull(x) __attribute__((__nonnull__(x)))
efb8080e 211#define __used __attribute__((__used__))
dc62b251 212#else
960a52dd 213#define __heedresult
dc62b251 214#define __nonnull(x)
efb8080e 215#define __used __unused
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216#endif
217
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218#endif /* LINT */
219
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220#if !__GNUC_PREREQ__(2, 7) && __STDC_VERSION < 199901
221#define __func__ NULL
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222#endif
223
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224#if (__GNUC_PREREQ__(2, 0) && !defined(__STRICT_ANSI)) || \
225 __STDC_VERSION__ >= 199901
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226#define __LONG_LONG_SUPPORTED
227#endif
228
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229/*
230 * GNU C version 2.96 adds explicit branch prediction so that
231 * the CPU back-end can hint the processor and also so that
232 * code blocks can be reordered such that the predicted path
233 * sees a more linear flow, thus improving cache behavior, etc.
234 *
235 * The following two macros provide us with a way to utilize this
236 * compiler feature. Use __predict_true() if you expect the expression
237 * to evaluate to true, and __predict_false() if you expect the
238 * expression to evaluate to false.
239 *
240 * A few notes about usage:
241 *
242 * * Generally, __predict_false() error condition checks (unless
243 * you have some _strong_ reason to do otherwise, in which case
244 * document it), and/or __predict_true() `no-error' condition
245 * checks, assuming you want to optimize for the no-error case.
246 *
247 * * Other than that, if you don't know the likelihood of a test
248 * succeeding from empirical or other `hard' evidence, don't
249 * make predictions.
250 *
251 * * These are meant to be used in places that are run `a lot'.
252 * It is wasteful to make predictions in code that is run
253 * seldomly (e.g. at subsystem initialization time) as the
254 * basic block reordering that this affects can often generate
255 * larger code.
256 */
257#if __GNUC_PREREQ__(2, 96)
258#define __predict_true(exp) __builtin_expect((exp), 1)
259#define __predict_false(exp) __builtin_expect((exp), 0)
260#else
261#define __predict_true(exp) (exp)
262#define __predict_false(exp) (exp)
263#endif
264
984263bc 265/*
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266 * GCC 2.95 and later provides `__restrict' as an extention to C90 to support
267 * the C99-specific `restrict' type qualifier. We happen to use `__restrict'
268 * as a way to define the `restrict' type qualifier without disturbing older
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269 * software that is unaware of C99 keywords.
270 */
3d28a533 271#if !__GNUC_PREREQ__(2, 95)
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272#if __STDC_VERSION__ < 199901
273#define __restrict
274#else
275#define __restrict restrict
276#endif
277#endif
278
279/*
280 * Compiler-dependent macros to declare that functions take printf-like
281 * or scanf-like arguments. They are null except for versions of gcc
282 * that are known to support the features properly (old versions of gcc-2
283 * didn't permit keeping the keywords out of the application namespace).
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284 *
285 * The printf0like macro for GCC 2 uses DragonFly specific compiler extensions.
984263bc 286 */
3d28a533 287#if !__GNUC_PREREQ__(2, 7)
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288#define __printflike(fmtarg, firstvararg)
289#define __scanflike(fmtarg, firstvararg)
38139e70 290#define __printf0like(fmtarg, firstvararg)
e0f95098 291#define __format_arg(fmtarg)
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292#define __strfmonlike(fmtarg, firstvararg)
293#define __strftimelike(fmtarg, firstvararg)
294
3d28a533 295#elif __GNUC_PREREQ__(3, 0)
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296#define __printflike(fmtarg, firstvararg) \
297 __attribute__((__nonnull__(fmtarg), \
298 __format__ (__printf__, fmtarg, firstvararg)))
299#define __printf0like(fmtarg, firstvararg) \
300 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
301#define __scanflike(fmtarg, firstvararg) \
302 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
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303#define __format_arg(fmtarg) \
304 __attribute__((__format_arg__ (fmtarg)))
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305#define __strfmonlike(fmtarg, firstvararg) \
306 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))
307#define __strftimelike(fmtarg, firstvararg) \
308 __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
38139e70 309
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310#else
311#define __printflike(fmtarg, firstvararg) \
312 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
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313#define __printf0like(fmtarg, firstvararg) \
314 __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
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315#define __scanflike(fmtarg, firstvararg) \
316 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
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317#define __format_arg(fmtarg) \
318 __attribute__((__format_arg__ (fmtarg)))
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319#define __strfmonlike(fmtarg, firstvararg) \
320 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))
321#define __strftimelike(fmtarg, firstvararg) \
322 __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
e0f95098 323
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324#endif
325
3d28a533 326#if !__GNUC_PREREQ__(3, 0)
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327#define __ARRAY_ZERO 0
328#else
329#define __ARRAY_ZERO
330#endif
331
25fffb38 332#if __GNUC_PREREQ__(4, 0)
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333#define __dso_public __attribute__((__visibility__("default")))
334#define __dso_hidden __attribute__((__visibility__("hidden")))
335#else
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336#define __dso_public
337#define __dso_hidden
338#endif
339
754d5cac 340/*
2ea04d5f 341 * A convenient constructor macro, GCC 4.3.0 added priority support to
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342 * constructors, provide a compatible interface for both.
343 */
344#if __GNUC_PREREQ__(4, 3)
345#define __constructor(prio) __attribute__((constructor(prio)))
346#else
347#define __constructor(prio) __attribute__((constructor))
348#endif
349
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350/*
351 * Handy GCC based macros:
352 *
353 * __cachealign:
354 *
355 * The __cachealign macro can be used for cache line aligning structures
356 * of small to medium size. It aligns the particular structure or
357 * storage type to a system default cache line alignment, thus giving us
358 * a much more better cache utilization by making the hardware work at
359 * its best burst speeds.
360 *
361 * __usereg:
362 *
363 * The __usereg macro can/should be used when a function contains
364 * arguments not more than 3. It can be very useful to us due to the
365 * message-passing nature of the kernel.
366 *
367 * !!NOTE - USAGE INFORMATION!!
368 *
369 * The __cachealign macro should not be used for data structures that are
370 * as big struct proc, struct vnode, struct thread, and other structs which
371 * are as big as them; simply because it will be useless in that case.
372 *
373 * The __usereg macro should be used whenever possible, i.e., when a function
374 * does not exceed more than 3 arguments, and should not be used for vararg
375 * type functions.
376 *
377 * In other words, AVOID MISUSE OF THESE MACROS. :-)
378 */
379#ifdef __GNUC__
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380#define __cachealign __attribute__((__aligned__(__VM_CACHELINE_SIZE)))
381#define __usereg __attribute__((__regparm__(3)))
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382#else
383#define __cachealign
384#define __usereg
385#endif
386
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387#ifdef __GNUC__
388#define __strong_reference(sym,aliassym) \
389 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
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390#define __weak_reference(sym,alias) \
391 __asm__(".weak " #alias); \
392 __asm__(".equ " #alias ", " #sym)
393#define __warn_references(sym,msg) \
394 __asm__(".section .gnu.warning." #sym); \
395 __asm__(".asciz \"" msg "\""); \
396 __asm__(".previous")
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397#endif /* __GNUC__ */
398
aa8d5dcb 399#if defined(__GNUC__)
984263bc 400#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
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401#endif
402
403#ifndef __RCSID
404#define __RCSID(s) __IDSTRING(rcsid,s)
405#endif
406
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407#ifndef __RCSID_SOURCE
408#define __RCSID_SOURCE(s) __IDSTRING(rcsid_source,s)
409#endif
410
411#ifndef __COPYRIGHT
412#define __COPYRIGHT(s) __IDSTRING(copyright,s)
413#endif
414
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415#ifndef __DECONST
416#define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var))
417#endif
418
419#ifndef __DEVOLATILE
420#define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var))
421#endif
422
423#ifndef __DEQUALIFY
424#define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var))
425#endif
426
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427/*
428 * Keywords added in C11.
429 */
430
431#if !__GNUC_PREREQ__(2, 95)
432#define __alignof(x) __offsetof(struct { char __a; x __b; }, __b)
433#endif
434
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435/*
436 * Keywords added in C11.
437 */
438
439#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L
440
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441#if !__has_extension(c_alignas)
442#if (defined(__cplusplus) && __cplusplus >= 201103L) || \
443 __has_extension(cxx_alignas)
444#define _Alignas(x) alignas(x)
445#else
446/* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */
447#define _Alignas(x) __aligned(x)
448#endif
449#endif
c3e32db9 450
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451#if defined(__cplusplus) && __cplusplus >= 201103L
452#define _Alignof(x) alignof(x)
453#else
454#define _Alignof(x) __alignof(x)
455#endif
456
457#define _Noreturn __dead2
c3e32db9 458
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459#if !__has_extension(c_static_assert)
460#if (defined(__cplusplus) && __cplusplus >= 201103L) || \
461 __has_extension(cxx_static_assert)
462#define _Static_assert(x, y) static_assert(x, y)
91c5bb9b 463#elif !__GNUC_PREREQ__(4, 6)
c5fedb6c 464#define _Static_assert(x, y) struct __hack
85325fa5 465#ifdef _KERNEL
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466#define CTASSERT(x) _CTASSERT(x, __LINE__)
467#define _CTASSERT(x, y) __CTASSERT(x, y)
468#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
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469#endif
470#endif
85325fa5 471#endif
31c7f3d7 472
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473#endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */
474
85325fa5 475#if defined(_KERNEL) && !defined(CTASSERT)
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476#define CTASSERT(x) _Static_assert(x, \
477 "compile-time assertion failed")
c5fedb6c 478#endif
c5fedb6c 479
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480/*
481 * Emulation of C11 _Generic(). Unlike the previously defined C11
482 * keywords, it is not possible to implement this using exactly the same
483 * syntax. Therefore implement something similar under the name
484 * __generic(). Unlike _Generic(), this macro can only distinguish
485 * between a single type, so it requires nested invocations to
486 * distinguish multiple cases.
487 */
488
489#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
490#define __generic(expr, t, yes, no) \
491 _Generic(expr, t: yes, default: no)
492#elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus)
493#define __generic(expr, t, yes, no) \
494 __builtin_choose_expr( \
495 __builtin_types_compatible_p(__typeof(expr), t), yes, no)
496#endif
497
984263bc 498/*-
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499 * POSIX.1 requires that the macros we test be defined before any standard
500 * header file is included.
501 *
502 * Here's a quick run-down of the versions:
503 * defined(_POSIX_SOURCE) 1003.1-1988
504 * _POSIX_C_SOURCE == 1 1003.1-1990
505 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option
506 * _POSIX_C_SOURCE == 199309 1003.1b-1993
507 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995,
508 * and the omnibus ISO/IEC 9945-1: 1996
509 * _POSIX_C_SOURCE == 200112 1003.1-2001
ae2ee8ee 510 * _POSIX_C_SOURCE == 200809 1003.1-2008
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511 *
512 * In addition, the X/Open Portability Guide, which is now the Single UNIX
513 * Specification, defines a feature-test macro which indicates the version of
514 * that specification, and which subsumes _POSIX_C_SOURCE.
515 *
516 * Our macros begin with two underscores to avoid namespace screwage.
517 */
518
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519/*
520 * If no special macro was specified, make the DragonFly extensions
521 * available. Also make them available when requested so.
522 */
523#if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) && \
524 !defined(_ANSI_SOURCE) && !defined(_C99_SOURCE)) || \
525 defined(_DRAGONFLY_SOURCE) || defined(_NETBSD_SOURCE)
526#define __DF_VISIBLE 1
527#else
528#define __DF_VISIBLE 0
529#endif
530
984263bc 531/* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
2c292fb2 532#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 1
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533#undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */
534#define _POSIX_C_SOURCE 199009
535#endif
536
537/* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
2c292fb2 538#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 2
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539#undef _POSIX_C_SOURCE
540#define _POSIX_C_SOURCE 199209
541#endif
542
543/* Deal with various X/Open Portability Guides and Single UNIX Spec. */
544#ifdef _XOPEN_SOURCE
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545#if _XOPEN_SOURCE - 0 >= 700
546#define __XSI_VISIBLE 700
547#undef _POSIX_C_SOURCE
548#define _POSIX_C_SOURCE 200809
549#elif _XOPEN_SOURCE - 0 >= 600
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550#define __XSI_VISIBLE 600
551#undef _POSIX_C_SOURCE
552#define _POSIX_C_SOURCE 200112
553#elif _XOPEN_SOURCE - 0 >= 500
554#define __XSI_VISIBLE 500
555#undef _POSIX_C_SOURCE
556#define _POSIX_C_SOURCE 199506
557#endif
558#endif
559
560/*
561 * Deal with all versions of POSIX. The ordering relative to the tests above is
562 * important.
563 */
564#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
565#define _POSIX_C_SOURCE 198808
566#endif
567#ifdef _POSIX_C_SOURCE
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568#if (_POSIX_C_SOURCE - 0) >= 200809
569#define __POSIX_VISIBLE 200809
570#define __ISO_C_VISIBLE 1999
571#elif (_POSIX_C_SOURCE - 0) >= 200112
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572#define __POSIX_VISIBLE 200112
573#define __ISO_C_VISIBLE 1999
2c292fb2 574#elif (_POSIX_C_SOURCE - 0) >= 199506
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575#define __POSIX_VISIBLE 199506
576#define __ISO_C_VISIBLE 1990
2c292fb2 577#elif (_POSIX_C_SOURCE - 0) >= 199309
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578#define __POSIX_VISIBLE 199309
579#define __ISO_C_VISIBLE 1990
2c292fb2 580#elif (_POSIX_C_SOURCE - 0) >= 199209
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581#define __POSIX_VISIBLE 199209
582#define __ISO_C_VISIBLE 1990
2c292fb2 583#elif (_POSIX_C_SOURCE - 0) >= 199009
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584#define __POSIX_VISIBLE 199009
585#define __ISO_C_VISIBLE 1990
586#else
587#define __POSIX_VISIBLE 198808
588#define __ISO_C_VISIBLE 0
589#endif /* _POSIX_C_SOURCE */
590#else
591/*-
592 * Deal with _ANSI_SOURCE:
593 * If it is defined, and no other compilation environment is explicitly
594 * requested, then define our internal feature-test macros to zero. This
595 * makes no difference to the preprocessor (undefined symbols in preprocessing
596 * expressions are defined to have value zero), but makes it more convenient for
597 * a test program to print out the values.
598 *
599 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
600 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
601 * environment (and in fact we will never get here).
602 */
603#ifdef _ANSI_SOURCE /* Hide almost everything. */
604#define __POSIX_VISIBLE 0
605#define __XSI_VISIBLE 0
606#define __BSD_VISIBLE 0
607#define __ISO_C_VISIBLE 1990
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608#elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */
609#define __POSIX_VISIBLE 0
610#define __XSI_VISIBLE 0
611#define __BSD_VISIBLE 0
612#define __ISO_C_VISIBLE 1999
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613#elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */
614#define __POSIX_VISIBLE 0
615#define __XSI_VISIBLE 0
616#define __BSD_VISIBLE 0
617#define __ISO_C_VISIBLE 2011
984263bc 618#else /* Default environment: show everything. */
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619#define __POSIX_VISIBLE 200809
620#define __XSI_VISIBLE 700
984263bc 621#define __BSD_VISIBLE 1
0d5acd74 622#define __ISO_C_VISIBLE 2011
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623#endif
624#endif
625
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626/*
627 * GLOBL macro exists to preserve __start_set_* and __stop_set_* sections
628 * of kernel modules which are discarded from binutils 2.17.50+ otherwise.
629 */
630
631#define __GLOBL1(sym) __asm__(".globl " #sym)
632#define __GLOBL(sym) __GLOBL1(sym)
633
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634/*
635 * Ignore the rcs id of a source file.
636 */
637
638#ifndef __FBSDID
639#define __FBSDID(s) struct __hack
640#endif
641
642#ifndef __RCSID
643#define __RCSID(s) struct __hack
644#endif
645
646#ifndef __RCSID_SOURCE
647#define __RCSID_SOURCE(s) struct __hack
648#endif
649
650#ifndef __SCCSID
651#define __SCCSID(s) struct __hack
652#endif
653
654#ifndef __COPYRIGHT
655#define __COPYRIGHT(s) struct __hack
656#endif
657
984263bc 658#endif /* !_SYS_CDEFS_H_ */