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)))
176 #if __GNUC_PREREQ__(2, 96)
177 #define __malloclike __attribute__((__malloc__))
178 #define __pure __attribute__((__pure__))
181 #define __pure __pure2
184 #if __GNUC_PREREQ__(3, 1)
185 #define __always_inline __attribute__((__always_inline__))
186 #define __noinline __attribute__((__noinline__))
188 #define __always_inline
192 #if __GNUC_PREREQ__(3, 3)
193 #define __nonnull(...) __attribute__((__nonnull__(__VA_ARGS__)))
194 #define __used __attribute__((__used__))
196 #define __nonnull(...)
197 #define __used __unused
200 #if __GNUC_PREREQ__(3, 4)
201 #define __heedresult __attribute__((__warn_unused_result__))
206 #if __GNUC_PREREQ__(4, 1)
207 #define __returns_twice __attribute__((__returns_twice__))
209 #define __returns_twice
212 #if __GNUC_PREREQ__(4, 6) || __has_builtin(__builtin_unreachable)
213 #define __unreachable() __builtin_unreachable()
215 #define __unreachable() ((void)0)
218 #if __GNUC_PREREQ__(4, 3) || __has_attribute(__alloc_size__)
219 #define __alloc_size(x) __attribute__((__alloc_size__(x)))
220 #define __alloc_size2(n, x) __attribute__((__alloc_size__(n, x)))
222 #define __alloc_size(x)
223 #define __alloc_size2(n, x)
226 #if __GNUC_PREREQ__(4, 9) || __has_attribute(__alloc_align__)
227 #define __alloc_align(x) __attribute__((__alloc_align__(x)))
229 #define __alloc_align(x)
232 #if !__GNUC_PREREQ__(2, 7) && __STDC_VERSION__ < 199901
233 #define __func__ NULL
236 #if (__GNUC_PREREQ__(2, 0) && !defined(__STRICT_ANSI__)) || \
237 __STDC_VERSION__ >= 199901
238 #define __LONG_LONG_SUPPORTED
241 /* C++11 exposes a load of C99 stuff */
242 #if defined(__cplusplus) && __cplusplus >= 201103L
243 #define __LONG_LONG_SUPPORTED
244 #ifndef __STDC_LIMIT_MACROS
245 #define __STDC_LIMIT_MACROS
247 #ifndef __STDC_CONSTANT_MACROS
248 #define __STDC_CONSTANT_MACROS
253 * GCC 2.95 and later provides `__restrict' as an extension to C90 to support
254 * the C99-specific `restrict' type qualifier. We happen to use `__restrict'
255 * as a way to define the `restrict' type qualifier without disturbing older
256 * software that is unaware of C99 keywords.
258 #if !__GNUC_PREREQ__(2, 95)
259 #if __STDC_VERSION__ < 199901
262 #define __restrict restrict
267 * C99 allows to declare arrays as non-overlapping.
269 #if __GNUC_PREREQ__(3, 1) && !defined(__GNUG__)
270 #define __restrict_arr __restrict
273 #define __restrict_arr
275 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901
276 #define __restrict_arr restrict
278 #define __restrict_arr
284 * GNU C version 2.96 adds explicit branch prediction so that
285 * the CPU back-end can hint the processor and also so that
286 * code blocks can be reordered such that the predicted path
287 * sees a more linear flow, thus improving cache behavior, etc.
289 * The following two macros provide us with a way to utilize this
290 * compiler feature. Use __predict_true() if you expect the expression
291 * to evaluate to true, and __predict_false() if you expect the
292 * expression to evaluate to false.
294 * A few notes about usage:
296 * * Generally, __predict_false() error condition checks (unless
297 * you have some _strong_ reason to do otherwise, in which case
298 * document it), and/or __predict_true() `no-error' condition
299 * checks, assuming you want to optimize for the no-error case.
301 * * Other than that, if you don't know the likelihood of a test
302 * succeeding from empirical or other `hard' evidence, don't
305 * * These are meant to be used in places that are run `a lot'.
306 * It is wasteful to make predictions in code that is run
307 * seldomly (e.g. at subsystem initialization time) as the
308 * basic block reordering that this affects can often generate
311 #if __GNUC_PREREQ__(2, 96)
312 #define __predict_true(exp) __builtin_expect((exp), 1)
313 #define __predict_false(exp) __builtin_expect((exp), 0)
315 #define __predict_true(exp) (exp)
316 #define __predict_false(exp) (exp)
320 * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
323 #if __GNUC_PREREQ__(4, 1)
324 #define __offsetof(type, field) __builtin_offsetof(type, field)
327 #define __offsetof(type, field) \
328 ((__size_t)(__uintptr_t)((const volatile void *)&((type *)0)->field))
330 #define __offsetof(type, field) \
331 (__offsetof__ (reinterpret_cast <__size_t> \
332 (&reinterpret_cast <const volatile char &> \
333 (static_cast<type *> (0)->field))))
338 * Compiler-dependent macros to declare that functions take printf-like
339 * or scanf-like arguments. They are null except for versions of gcc
340 * that are known to support the features properly (old versions of gcc-2
341 * didn't permit keeping the keywords out of the application namespace).
343 * The printf0like macro for GCC 2 uses DragonFly specific compiler extensions.
345 #if !__GNUC_PREREQ__(2, 7)
346 #define __printflike(fmtarg, firstvararg)
347 #define __scanflike(fmtarg, firstvararg)
348 #define __printf0like(fmtarg, firstvararg)
349 #define __format_arg(fmtarg)
350 #define __strfmonlike(fmtarg, firstvararg)
351 #define __strftimelike(fmtarg, firstvararg)
353 #elif __GNUC_PREREQ__(3, 0)
354 #define __printflike(fmtarg, firstvararg) \
355 __attribute__((__nonnull__(fmtarg), \
356 __format__ (__printf__, fmtarg, firstvararg)))
357 #define __printf0like(fmtarg, firstvararg) \
358 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
359 #define __scanflike(fmtarg, firstvararg) \
360 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
361 #define __format_arg(fmtarg) \
362 __attribute__((__format_arg__ (fmtarg)))
363 #define __strfmonlike(fmtarg, firstvararg) \
364 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))
365 #define __strftimelike(fmtarg, firstvararg) \
366 __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
369 #define __printflike(fmtarg, firstvararg) \
370 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
371 #define __printf0like(fmtarg, firstvararg) \
372 __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
373 #define __scanflike(fmtarg, firstvararg) \
374 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
375 #define __format_arg(fmtarg) \
376 __attribute__((__format_arg__ (fmtarg)))
377 #define __strfmonlike(fmtarg, firstvararg) \
378 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))
379 #define __strftimelike(fmtarg, firstvararg) \
380 __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
383 #if !__GNUC_PREREQ__(3, 0)
384 #define __ARRAY_ZERO 0
389 #if __GNUC_PREREQ__(4, 0)
390 #define __dso_public __attribute__((__visibility__("default")))
391 #define __dso_hidden __attribute__((__visibility__("hidden")))
398 * A convenient constructor macro, GCC 4.3.0 added priority support to
399 * constructors, provide a compatible interface for both.
401 #if __GNUC_PREREQ__(4, 3)
402 #define __constructor(prio) __attribute__((constructor(prio)))
404 #define __constructor(prio) __attribute__((constructor))
408 * Handy GCC based macros:
412 * The __cachealign macro can be used for cache line aligning structures
413 * of small to medium size. It aligns the particular structure or
414 * storage type to a system default cache line alignment, thus giving us
415 * a much more better cache utilization by making the hardware work at
416 * its best burst speeds.
420 * The __usereg macro can/should be used when a function contains
421 * arguments not more than 3. It can be very useful to us due to the
422 * message-passing nature of the kernel.
424 * !!NOTE - USAGE INFORMATION!!
426 * The __cachealign macro should not be used for data structures that are
427 * as big struct proc, struct vnode, struct thread, and other structs which
428 * are as big as them; simply because it will be useless in that case.
430 * The __usereg macro should be used whenever possible, i.e., when a function
431 * does not exceed more than 3 arguments, and should not be used for vararg
434 * In other words, AVOID MISUSE OF THESE MACROS. :-)
437 #define __cachealign __attribute__((__aligned__(__VM_CACHELINE_SIZE)))
438 #define __usereg __attribute__((__regparm__(3)))
445 #define __strong_reference(sym,aliassym) \
446 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)))
447 #define __weak_reference(sym,aliassym) \
448 __strong_reference(sym,aliassym) __attribute__ ((__weak__))
449 #define __weak_reference_asm(sym,alias) \
450 __asm__(".weak " #alias); \
451 __asm__(".equ " #alias ", " #sym)
452 #define __warn_references(sym,msg) \
453 __asm__(".section .gnu.warning." #sym); \
454 __asm__(".asciz \"" msg "\""); \
456 #define __sym_compat(sym,impl,verid) \
457 __asm__(".symver " #impl ", " #sym "@" #verid)
458 #define __sym_default(sym,impl,verid) \
459 __asm__(".symver " #impl ", " #sym "@@@" #verid)
460 #endif /* __GNUC__ */
462 #if defined(__GNUC__)
463 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
467 #define __RCSID(s) struct __hack
470 #ifndef __RCSID_SOURCE
471 #define __RCSID_SOURCE(s) struct __hack
475 #define __SCCSID(s) struct __hack
479 #define __FBSDID(s) struct __hack
483 #define __COPYRIGHT(s) struct __hack
487 #define __DECONST(type, var) ((type)(__uintptr_t)(const void *)(var))
491 #define __DEVOLATILE(type, var) ((type)(__uintptr_t)(volatile void *)(var))
495 #define __DEQUALIFY(type, var) ((type)(__uintptr_t)(const volatile void *)(var))
499 * Keywords added in C11.
502 #if !__GNUC_PREREQ__(2, 95)
503 #define __alignof(x) __offsetof(struct { char __a; x __b; }, __b)
506 #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L
508 #if !__has_extension(c_alignas)
509 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \
510 __has_extension(cxx_alignas)
511 #define _Alignas(x) alignas(x)
513 /* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */
514 #define _Alignas(x) __aligned(x)
518 #if defined(__cplusplus) && __cplusplus >= 201103L
519 #define _Alignof(x) alignof(x)
521 #define _Alignof(x) __alignof(x)
524 #if !defined(_Noreturn)
525 #define _Noreturn __dead2
528 #if !__has_extension(c_static_assert)
529 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \
530 __has_extension(cxx_static_assert)
531 #define _Static_assert(x, y) static_assert(x, y)
532 #elif !__GNUC_PREREQ__(4, 6)
533 #define _Static_assert(x, y) struct __hack
535 #define CTASSERT(x) _CTASSERT(x, __LINE__)
536 #define _CTASSERT(x, y) __CTASSERT(x, y)
537 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
542 * GCC 4.7 has -std=c++11 but does not support thread_local.
544 #if !__has_extension(c_thread_local)
545 #if (defined(__cplusplus) && __cplusplus >= 201103L && __GNUC_PREREQ__(4, 8)) || \
546 __has_extension(cxx_thread_local)
547 #define _Thread_local thread_local
549 #define _Thread_local __thread
554 #endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */
556 #if defined(_KERNEL) && !defined(CTASSERT)
557 #define CTASSERT(x) _Static_assert(x, \
558 "compile-time assertion failed")
562 * Emulation of C11 _Generic(). Unlike the previously defined C11
563 * keywords, it is not possible to implement this using exactly the same
564 * syntax. Therefore implement something similar under the name
565 * __generic(). Unlike _Generic(), this macro can only distinguish
566 * between a single type, so it requires nested invocations to
567 * distinguish multiple cases.
570 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
571 #define __generic(expr, t, yes, no) \
572 _Generic(expr, t: yes, default: no)
573 #elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus)
574 #define __generic(expr, t, yes, no) \
575 __builtin_choose_expr( \
576 __builtin_types_compatible_p(__typeof(expr), t), yes, no)
580 * POSIX.1 requires that the macros we test be defined before any standard
581 * header file is included.
583 * Here's a quick run-down of the versions:
584 * defined(_POSIX_SOURCE) 1003.1-1988
585 * _POSIX_C_SOURCE == 1 1003.1-1990
586 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option
587 * _POSIX_C_SOURCE == 199309 1003.1b-1993
588 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995,
589 * and the omnibus ISO/IEC 9945-1: 1996
590 * _POSIX_C_SOURCE == 200112 1003.1-2001
591 * _POSIX_C_SOURCE == 200809 1003.1-2008
593 * In addition, the X/Open Portability Guide, which is now the Single UNIX
594 * Specification, defines a feature-test macro which indicates the version of
595 * that specification, and which subsumes _POSIX_C_SOURCE.
597 * Our macros begin with two underscores to avoid namespace screwage.
600 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
601 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 1
602 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */
603 #define _POSIX_C_SOURCE 199009
606 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
607 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 2
608 #undef _POSIX_C_SOURCE
609 #define _POSIX_C_SOURCE 199209
612 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */
614 #if _XOPEN_SOURCE - 0 >= 700
615 #define __XSI_VISIBLE 700
616 #undef _POSIX_C_SOURCE
617 #define _POSIX_C_SOURCE 200809
618 #elif _XOPEN_SOURCE - 0 >= 600
619 #define __XSI_VISIBLE 600
620 #undef _POSIX_C_SOURCE
621 #define _POSIX_C_SOURCE 200112
622 #elif _XOPEN_SOURCE - 0 >= 500
623 #define __XSI_VISIBLE 500
624 #undef _POSIX_C_SOURCE
625 #define _POSIX_C_SOURCE 199506
630 * Deal with all versions of POSIX. The ordering relative to the tests above is
633 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
634 #define _POSIX_C_SOURCE 198808
636 #ifdef _POSIX_C_SOURCE
637 #if (_POSIX_C_SOURCE - 0) >= 200809
638 #define __POSIX_VISIBLE 200809
639 #define __ISO_C_VISIBLE 1999
640 #elif (_POSIX_C_SOURCE - 0) >= 200112
641 #define __POSIX_VISIBLE 200112
642 #define __ISO_C_VISIBLE 1999
643 #elif (_POSIX_C_SOURCE - 0) >= 199506
644 #define __POSIX_VISIBLE 199506
645 #define __ISO_C_VISIBLE 1990
646 #elif (_POSIX_C_SOURCE - 0) >= 199309
647 #define __POSIX_VISIBLE 199309
648 #define __ISO_C_VISIBLE 1990
649 #elif (_POSIX_C_SOURCE - 0) >= 199209
650 #define __POSIX_VISIBLE 199209
651 #define __ISO_C_VISIBLE 1990
652 #elif (_POSIX_C_SOURCE - 0) >= 199009
653 #define __POSIX_VISIBLE 199009
654 #define __ISO_C_VISIBLE 1990
656 #define __POSIX_VISIBLE 198808
657 #define __ISO_C_VISIBLE 0
658 #endif /* _POSIX_C_SOURCE */
661 * Deal with _ANSI_SOURCE:
662 * If it is defined, and no other compilation environment is explicitly
663 * requested, then define our internal feature-test macros to zero. This
664 * makes no difference to the preprocessor (undefined symbols in preprocessing
665 * expressions are defined to have value zero), but makes it more convenient for
666 * a test program to print out the values.
668 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
669 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
670 * environment (and in fact we will never get here).
672 #if defined(_ANSI_SOURCE) /* Hide almost everything. */
673 #define __POSIX_VISIBLE 0
674 #define __XSI_VISIBLE 0
675 #define __BSD_VISIBLE 0
676 #define __ISO_C_VISIBLE 1990
677 #define __EXT1_VISIBLE 0
678 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */
679 #define __POSIX_VISIBLE 0
680 #define __XSI_VISIBLE 0
681 #define __BSD_VISIBLE 0
682 #define __ISO_C_VISIBLE 1999
683 #define __EXT1_VISIBLE 0
684 #elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */
685 #define __POSIX_VISIBLE 0
686 #define __XSI_VISIBLE 0
687 #define __BSD_VISIBLE 0
688 #define __ISO_C_VISIBLE 2011
689 #define __EXT1_VISIBLE 0
690 #else /* Default environment: show everything. */
691 #define __POSIX_VISIBLE 200809
692 #define __XSI_VISIBLE 700
693 #define __BSD_VISIBLE 1
694 #define __ISO_C_VISIBLE 2011
695 #define __EXT1_VISIBLE 1
699 /* User override __EXT1_VISIBLE */
700 #if defined(__STDC_WANT_LIB_EXT1__)
701 #undef __EXT1_VISIBLE
702 #if __STDC_WANT_LIB_EXT1__
703 #define __EXT1_VISIBLE 1
705 #define __EXT1_VISIBLE 0
707 #endif /* __STDC_WANT_LIB_EXT1__ */
709 #ifndef __BSD_VISIBLE
710 #define __BSD_VISIBLE 0
712 #ifndef __EXT1_VISIBLE
713 #define __EXT1_VISIBLE 0
717 * GLOBL macro exists to preserve __start_set_* and __stop_set_* sections
718 * of kernel modules which are discarded from binutils 2.17.50+ otherwise.
721 #define __GLOBL1(sym) __asm__(".globl " #sym)
722 #define __GLOBL(sym) __GLOBL1(sym)
724 #endif /* !_SYS_CDEFS_H_ */