2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Berkeley Software Design, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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. 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.
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
32 * @(#)cdefs.h 8.8 (Berkeley) 1/9/95
33 * $FreeBSD: src/sys/sys/cdefs.h,v 1.28.2.8 2002/09/18 04:05:13 mikeh Exp $
40 * Testing against Clang-specific extensions.
42 #ifndef __has_attribute
43 #define __has_attribute(x) 0
45 #ifndef __has_extension
46 #define __has_extension __has_feature
49 #define __has_feature(x) 0
52 #define __has_include(x) 0
55 #define __has_builtin(x) 0
59 * Macro to test if we are using a specific version of gcc or later.
61 #if defined(__GNUC__) && !defined(__INTEL_COMPILER)
62 #define __GNUC_PREREQ__(ma, mi) \
63 (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi))
65 #define __GNUC_PREREQ__(ma, mi) 0
68 #if defined(__cplusplus)
69 #if __GNUC_PREREQ__(4, 0)
70 #define __BEGIN_DECLS _Pragma("GCC visibility push(default)") extern "C" {
71 #define __END_DECLS } _Pragma("GCC visibility pop")
73 #define __BEGIN_DECLS extern "C" {
82 * The __VM_CACHELINE_SIZE macro defines the common cache line alignment
83 * size that can be found across most recent and somewhat latest Intel
84 * hardware, i.e. L1 cache sizes etc.
86 * If needed, this value can be TUNED. Suitable values for this macro
87 * are 32, 64 and 128 bytes. The unit of measurement for this macro is
90 * XXX: This macro and related macros will eventually move to a MD
91 * header, but currently, we do need such a hierarchy.
93 #define __VM_CACHELINE_SIZE 64
94 #define __VM_CACHELINE_MASK (__VM_CACHELINE_SIZE - 1)
95 #define __VM_CACHELINE_ALIGN(n) \
96 (((n) + __VM_CACHELINE_MASK) & ~__VM_CACHELINE_MASK)
99 * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
100 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
101 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
102 * mode -- there must be no spaces between its arguments, and for nested
103 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also
104 * concatenate double-quoted strings produced by the __STRING macro, but
105 * this only works with ANSI C.
107 * __XSTRING is like __STRING, but it expands any macros in its argument
108 * first. It is only available with ANSI C.
110 #if defined(__STDC__) || defined(__cplusplus)
111 #define __P(protos) protos /* full-blown ANSI C */
112 #define __CONCAT1(x,y) x ## y
113 #define __CONCAT(x,y) __CONCAT1(x,y)
114 #define __STRING(x) #x /* stringify without expanding x */
115 #define __XSTRING(x) __STRING(x) /* expand x, then stringify */
117 #define __const const /* define reserved names to standard */
118 #define __signed signed
119 #define __volatile volatile
120 #if defined(__cplusplus)
121 #define __inline inline /* convert to C++ keyword */
124 #define __inline /* delete GCC keyword */
125 #endif /* !__GNUC__ */
126 #endif /* !__cplusplus */
128 #else /* !(__STDC__ || __cplusplus) */
129 #define __P(protos) () /* traditional C preprocessor */
130 #define __CONCAT(x,y) x/**/y
131 #define __STRING(x) "x"
134 #define __const /* delete pseudo-ANSI C keywords */
139 * In non-ANSI C environments, new programs will want ANSI-only C keywords
140 * deleted from the program and old programs will want them left alone.
141 * When using a compiler other than gcc, programs using the ANSI C keywords
142 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
143 * When using "gcc -traditional", we assume that this is the intent; if
144 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
146 #ifndef NO_ANSI_KEYWORDS
147 #define const /* delete ANSI C keywords */
151 #endif /* !NO_ANSI_KEYWORDS */
152 #endif /* !__GNUC__ */
153 #endif /* !(__STDC__ || __cplusplus) */
156 * Compiler-dependent macros to help declare dead (non-returning) and
157 * pure (no side effects) functions, and unused variables. They are
158 * null except for versions of gcc that are known to support the features
159 * properly (old versions of gcc-2 supported the dead and pure features
160 * in a different (wrong) way).
162 #define __weak_symbol __attribute__((__weak__))
163 #if __GNUC_PREREQ__(2, 7)
164 #define __dead2 __attribute__((__noreturn__))
165 #define __pure2 __attribute__((__const__))
166 #define __unused __attribute__((__unused__))
167 #define __packed __attribute__((__packed__))
168 #define __aligned(x) __attribute__((__aligned__(x)))
169 #define __section(x) __attribute__((__section__(x)))
170 #define __read_mostly __section(".data.read_mostly")
171 #define __read_frequently __section(".data.read_frequently")
172 #define __exclusive_cache_line __aligned(__VM_CACHELINE_SIZE*2) \
173 __section(".data.exclusive_cache_line")
181 #if __GNUC_PREREQ__(2, 96)
182 #define __malloclike __attribute__((__malloc__))
183 #define __pure __attribute__((__pure__))
186 #define __pure __pure2
189 #if __GNUC_PREREQ__(3, 1)
190 #define __always_inline __attribute__((__always_inline__))
191 #define __noinline __attribute__((__noinline__))
193 #define __always_inline
197 #if __GNUC_PREREQ__(3, 3)
198 #define __nonnull(...) __attribute__((__nonnull__(__VA_ARGS__)))
199 #define __used __attribute__((__used__))
201 #define __nonnull(...)
202 #define __used __unused
205 #if __GNUC_PREREQ__(3, 4)
206 #define __heedresult __attribute__((__warn_unused_result__))
211 #if __GNUC_PREREQ__(4, 1)
212 #define __returns_twice __attribute__((__returns_twice__))
214 #define __returns_twice
217 #if __GNUC_PREREQ__(4, 6) || __has_builtin(__builtin_unreachable)
218 #define __unreachable() __builtin_unreachable()
220 #define __unreachable() ((void)0)
223 #if __GNUC_PREREQ__(4, 3) || __has_attribute(__alloc_size__)
224 #define __alloc_size(x) __attribute__((__alloc_size__(x)))
225 #define __alloc_size2(n, x) __attribute__((__alloc_size__(n, x)))
227 #define __alloc_size(x)
228 #define __alloc_size2(n, x)
231 #if __GNUC_PREREQ__(4, 9) || __has_attribute(__alloc_align__)
232 #define __alloc_align(x) __attribute__((__alloc_align__(x)))
234 #define __alloc_align(x)
237 #if !__GNUC_PREREQ__(2, 7) && __STDC_VERSION__ < 199901
238 #define __func__ NULL
241 #if (__GNUC_PREREQ__(2, 0) && !defined(__STRICT_ANSI__)) || \
242 __STDC_VERSION__ >= 199901
243 #define __LONG_LONG_SUPPORTED
246 /* C++11 exposes a load of C99 stuff */
247 #if defined(__cplusplus) && __cplusplus >= 201103L
248 #define __LONG_LONG_SUPPORTED
249 #ifndef __STDC_LIMIT_MACROS
250 #define __STDC_LIMIT_MACROS
252 #ifndef __STDC_CONSTANT_MACROS
253 #define __STDC_CONSTANT_MACROS
258 * GCC 2.95 and later provides `__restrict' as an extension to C90 to support
259 * the C99-specific `restrict' type qualifier. We happen to use `__restrict'
260 * as a way to define the `restrict' type qualifier without disturbing older
261 * software that is unaware of C99 keywords.
263 #if !__GNUC_PREREQ__(2, 95)
264 #if __STDC_VERSION__ < 199901
267 #define __restrict restrict
272 * C99 allows to declare arrays as non-overlapping.
274 #if __GNUC_PREREQ__(3, 1) && !defined(__GNUG__)
275 #define __restrict_arr __restrict
278 #define __restrict_arr
280 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901
281 #define __restrict_arr restrict
283 #define __restrict_arr
289 * GNU C version 2.96 adds explicit branch prediction so that
290 * the CPU back-end can hint the processor and also so that
291 * code blocks can be reordered such that the predicted path
292 * sees a more linear flow, thus improving cache behavior, etc.
294 * The following two macros provide us with a way to utilize this
295 * compiler feature. Use __predict_true() if you expect the expression
296 * to evaluate to true, and __predict_false() if you expect the
297 * expression to evaluate to false.
299 * A few notes about usage:
301 * * Generally, __predict_false() error condition checks (unless
302 * you have some _strong_ reason to do otherwise, in which case
303 * document it), and/or __predict_true() `no-error' condition
304 * checks, assuming you want to optimize for the no-error case.
306 * * Other than that, if you don't know the likelihood of a test
307 * succeeding from empirical or other `hard' evidence, don't
310 * * These are meant to be used in places that are run `a lot'.
311 * It is wasteful to make predictions in code that is run
312 * seldomly (e.g. at subsystem initialization time) as the
313 * basic block reordering that this affects can often generate
316 #if __GNUC_PREREQ__(2, 96)
317 #define __predict_true(exp) __builtin_expect((exp), 1)
318 #define __predict_false(exp) __builtin_expect((exp), 0)
320 #define __predict_true(exp) (exp)
321 #define __predict_false(exp) (exp)
325 * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
328 #if __GNUC_PREREQ__(4, 1)
329 #define __offsetof(type, field) __builtin_offsetof(type, field)
332 #define __offsetof(type, field) \
333 ((__size_t)(__uintptr_t)((const volatile void *)&((type *)0)->field))
335 #define __offsetof(type, field) \
336 (__offsetof__ (reinterpret_cast <__size_t> \
337 (&reinterpret_cast <const volatile char &> \
338 (static_cast<type *> (0)->field))))
343 * Compiler-dependent macros to declare that functions take printf-like
344 * or scanf-like arguments. They are null except for versions of gcc
345 * that are known to support the features properly (old versions of gcc-2
346 * didn't permit keeping the keywords out of the application namespace).
348 * The printf0like macro for GCC 2 uses DragonFly specific compiler extensions.
350 #if !__GNUC_PREREQ__(2, 7)
351 #define __printflike(fmtarg, firstvararg)
352 #define __scanflike(fmtarg, firstvararg)
353 #define __printf0like(fmtarg, firstvararg)
354 #define __format_arg(fmtarg)
355 #define __strfmonlike(fmtarg, firstvararg)
356 #define __strftimelike(fmtarg, firstvararg)
358 #elif __GNUC_PREREQ__(3, 0)
359 #define __printflike(fmtarg, firstvararg) \
360 __attribute__((__nonnull__(fmtarg), \
361 __format__ (__printf__, fmtarg, firstvararg)))
362 #define __printf0like(fmtarg, firstvararg) \
363 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
364 #define __scanflike(fmtarg, firstvararg) \
365 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
366 #define __format_arg(fmtarg) \
367 __attribute__((__format_arg__ (fmtarg)))
368 #define __strfmonlike(fmtarg, firstvararg) \
369 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))
370 #define __strftimelike(fmtarg, firstvararg) \
371 __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
374 #define __printflike(fmtarg, firstvararg) \
375 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
376 #define __printf0like(fmtarg, firstvararg) \
377 __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
378 #define __scanflike(fmtarg, firstvararg) \
379 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
380 #define __format_arg(fmtarg) \
381 __attribute__((__format_arg__ (fmtarg)))
382 #define __strfmonlike(fmtarg, firstvararg) \
383 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))
384 #define __strftimelike(fmtarg, firstvararg) \
385 __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
388 #if !__GNUC_PREREQ__(3, 0)
389 #define __ARRAY_ZERO 0
394 #if __GNUC_PREREQ__(4, 0)
395 #define __dso_public __attribute__((__visibility__("default")))
396 #define __dso_hidden __attribute__((__visibility__("hidden")))
403 * A convenient constructor macro, GCC 4.3.0 added priority support to
404 * constructors, provide a compatible interface for both.
406 #if __GNUC_PREREQ__(4, 3)
407 #define __constructor(prio) __attribute__((constructor(prio)))
409 #define __constructor(prio) __attribute__((constructor))
413 * Handy GCC based macros:
417 * The __cachealign macro can be used for cache line aligning structures
418 * of small to medium size. It aligns the particular structure or
419 * storage type to a system default cache line alignment, thus giving us
420 * a much more better cache utilization by making the hardware work at
421 * its best burst speeds.
425 * The __usereg macro can/should be used when a function contains
426 * arguments not more than 3. It can be very useful to us due to the
427 * message-passing nature of the kernel.
429 * !!NOTE - USAGE INFORMATION!!
431 * The __cachealign macro should not be used for data structures that are
432 * as big struct proc, struct vnode, struct thread, and other structs which
433 * are as big as them; simply because it will be useless in that case.
435 * The __usereg macro should be used whenever possible, i.e., when a function
436 * does not exceed more than 3 arguments, and should not be used for vararg
439 * In other words, AVOID MISUSE OF THESE MACROS. :-)
442 #define __cachealign __attribute__((__aligned__(__VM_CACHELINE_SIZE)))
443 #define __usereg __attribute__((__regparm__(3)))
450 #define __strong_reference(sym,aliassym) \
451 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)))
452 #define __weak_reference(sym,aliassym) \
453 __strong_reference(sym,aliassym) __attribute__ ((__weak__))
454 #define __weak_reference_asm(sym,alias) \
455 __asm__(".weak " #alias); \
456 __asm__(".equ " #alias ", " #sym)
457 #define __warn_references(sym,msg) \
458 __asm__(".section .gnu.warning." #sym); \
459 __asm__(".asciz \"" msg "\""); \
461 #define __sym_compat(sym,impl,verid) \
462 __asm__(".symver " #impl ", " #sym "@" #verid)
463 #define __sym_default(sym,impl,verid) \
464 __asm__(".symver " #impl ", " #sym "@@@" #verid)
465 #endif /* __GNUC__ */
467 #if defined(__GNUC__)
468 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
472 #define __RCSID(s) struct __hack
475 #ifndef __RCSID_SOURCE
476 #define __RCSID_SOURCE(s) struct __hack
480 #define __SCCSID(s) struct __hack
484 #define __FBSDID(s) struct __hack
488 #define __COPYRIGHT(s) struct __hack
492 #define __DECONST(type, var) ((type)(__uintptr_t)(const void *)(var))
496 #define __DEVOLATILE(type, var) ((type)(__uintptr_t)(volatile void *)(var))
500 #define __DEQUALIFY(type, var) ((type)(__uintptr_t)(const volatile void *)(var))
504 * Keywords added in C11.
507 #if !__GNUC_PREREQ__(2, 95)
508 #define __alignof(x) __offsetof(struct { char __a; x __b; }, __b)
511 #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L
513 #if !__has_extension(c_alignas)
514 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \
515 __has_extension(cxx_alignas)
516 #define _Alignas(x) alignas(x)
518 /* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */
519 #define _Alignas(x) __aligned(x)
523 #if defined(__cplusplus) && __cplusplus >= 201103L
524 #define _Alignof(x) alignof(x)
526 #define _Alignof(x) __alignof(x)
529 #if !defined(_Noreturn)
530 #define _Noreturn __dead2
533 #if !__has_extension(c_static_assert)
534 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \
535 __has_extension(cxx_static_assert)
536 #define _Static_assert(x, y) static_assert(x, y)
537 #elif !__GNUC_PREREQ__(4, 6)
538 #define _Static_assert(x, y) struct __hack
540 #define CTASSERT(x) _CTASSERT(x, __LINE__)
541 #define _CTASSERT(x, y) __CTASSERT(x, y)
542 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
547 #endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */
549 #if defined(_KERNEL) && !defined(CTASSERT)
550 #define CTASSERT(x) _Static_assert(x, \
551 "compile-time assertion failed")
555 * Emulation of C11 _Generic(). Unlike the previously defined C11
556 * keywords, it is not possible to implement this using exactly the same
557 * syntax. Therefore implement something similar under the name
558 * __generic(). Unlike _Generic(), this macro can only distinguish
559 * between a single type, so it requires nested invocations to
560 * distinguish multiple cases.
563 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
564 #define __generic(expr, t, yes, no) \
565 _Generic(expr, t: yes, default: no)
566 #elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus)
567 #define __generic(expr, t, yes, no) \
568 __builtin_choose_expr( \
569 __builtin_types_compatible_p(__typeof(expr), t), yes, no)
573 * POSIX.1 requires that the macros we test be defined before any standard
574 * header file is included.
576 * Here's a quick run-down of the versions:
577 * defined(_POSIX_SOURCE) 1003.1-1988
578 * _POSIX_C_SOURCE == 1 1003.1-1990
579 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option
580 * _POSIX_C_SOURCE == 199309 1003.1b-1993
581 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995,
582 * and the omnibus ISO/IEC 9945-1: 1996
583 * _POSIX_C_SOURCE == 200112 1003.1-2001
584 * _POSIX_C_SOURCE == 200809 1003.1-2008
586 * In addition, the X/Open Portability Guide, which is now the Single UNIX
587 * Specification, defines a feature-test macro which indicates the version of
588 * that specification, and which subsumes _POSIX_C_SOURCE.
590 * Our macros begin with two underscores to avoid namespace screwage.
593 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
594 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 1
595 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */
596 #define _POSIX_C_SOURCE 199009
599 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
600 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 2
601 #undef _POSIX_C_SOURCE
602 #define _POSIX_C_SOURCE 199209
605 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */
607 #if _XOPEN_SOURCE - 0 >= 700
608 #define __XSI_VISIBLE 700
609 #undef _POSIX_C_SOURCE
610 #define _POSIX_C_SOURCE 200809
611 #elif _XOPEN_SOURCE - 0 >= 600
612 #define __XSI_VISIBLE 600
613 #undef _POSIX_C_SOURCE
614 #define _POSIX_C_SOURCE 200112
615 #elif _XOPEN_SOURCE - 0 >= 500
616 #define __XSI_VISIBLE 500
617 #undef _POSIX_C_SOURCE
618 #define _POSIX_C_SOURCE 199506
623 * Deal with all versions of POSIX. The ordering relative to the tests above is
626 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
627 #define _POSIX_C_SOURCE 198808
629 #ifdef _POSIX_C_SOURCE
630 #if (_POSIX_C_SOURCE - 0) >= 200809
631 #define __POSIX_VISIBLE 200809
632 #define __ISO_C_VISIBLE 1999
633 #elif (_POSIX_C_SOURCE - 0) >= 200112
634 #define __POSIX_VISIBLE 200112
635 #define __ISO_C_VISIBLE 1999
636 #elif (_POSIX_C_SOURCE - 0) >= 199506
637 #define __POSIX_VISIBLE 199506
638 #define __ISO_C_VISIBLE 1990
639 #elif (_POSIX_C_SOURCE - 0) >= 199309
640 #define __POSIX_VISIBLE 199309
641 #define __ISO_C_VISIBLE 1990
642 #elif (_POSIX_C_SOURCE - 0) >= 199209
643 #define __POSIX_VISIBLE 199209
644 #define __ISO_C_VISIBLE 1990
645 #elif (_POSIX_C_SOURCE - 0) >= 199009
646 #define __POSIX_VISIBLE 199009
647 #define __ISO_C_VISIBLE 1990
649 #define __POSIX_VISIBLE 198808
650 #define __ISO_C_VISIBLE 0
651 #endif /* _POSIX_C_SOURCE */
654 * Deal with _ANSI_SOURCE:
655 * If it is defined, and no other compilation environment is explicitly
656 * requested, then define our internal feature-test macros to zero. This
657 * makes no difference to the preprocessor (undefined symbols in preprocessing
658 * expressions are defined to have value zero), but makes it more convenient for
659 * a test program to print out the values.
661 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
662 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
663 * environment (and in fact we will never get here).
665 #if defined(_ANSI_SOURCE) /* Hide almost everything. */
666 #define __POSIX_VISIBLE 0
667 #define __XSI_VISIBLE 0
668 #define __BSD_VISIBLE 0
669 #define __ISO_C_VISIBLE 1990
670 #define __EXT1_VISIBLE 0
671 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */
672 #define __POSIX_VISIBLE 0
673 #define __XSI_VISIBLE 0
674 #define __BSD_VISIBLE 0
675 #define __ISO_C_VISIBLE 1999
676 #define __EXT1_VISIBLE 0
677 #elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */
678 #define __POSIX_VISIBLE 0
679 #define __XSI_VISIBLE 0
680 #define __BSD_VISIBLE 0
681 #define __ISO_C_VISIBLE 2011
682 #define __EXT1_VISIBLE 0
683 #else /* Default environment: show everything. */
684 #define __POSIX_VISIBLE 200809
685 #define __XSI_VISIBLE 700
686 #define __BSD_VISIBLE 1
687 #define __ISO_C_VISIBLE 2011
688 #define __EXT1_VISIBLE 1
692 /* User override __EXT1_VISIBLE */
693 #if defined(__STDC_WANT_LIB_EXT1__)
694 #undef __EXT1_VISIBLE
695 #if __STDC_WANT_LIB_EXT1__
696 #define __EXT1_VISIBLE 1
698 #define __EXT1_VISIBLE 0
700 #endif /* __STDC_WANT_LIB_EXT1__ */
702 #ifndef __BSD_VISIBLE
703 #define __BSD_VISIBLE 0
705 #ifndef __EXT1_VISIBLE
706 #define __EXT1_VISIBLE 0
710 * GLOBL macro exists to preserve __start_set_* and __stop_set_* sections
711 * of kernel modules which are discarded from binutils 2.17.50+ otherwise.
714 #define __GLOBL1(sym) __asm__(".globl " #sym)
715 #define __GLOBL(sym) __GLOBL1(sym)
717 #endif /* !_SYS_CDEFS_H_ */