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, 3) || __has_attribute(__alloc_size__)
218 #define __alloc_size(x) __attribute__((__alloc_size__(x)))
219 #define __alloc_size2(n, x) __attribute__((__alloc_size__(n, x)))
221 #define __alloc_size(x)
222 #define __alloc_size2(n, x)
225 #if __GNUC_PREREQ__(4, 9) || __has_attribute(__alloc_align__)
226 #define __alloc_align(x) __attribute__((__alloc_align__(x)))
228 #define __alloc_align(x)
231 #if !__GNUC_PREREQ__(2, 7) && __STDC_VERSION__ < 199901
232 #define __func__ NULL
235 #if (__GNUC_PREREQ__(2, 0) && !defined(__STRICT_ANSI__)) || \
236 __STDC_VERSION__ >= 199901
237 #define __LONG_LONG_SUPPORTED
240 /* C++11 exposes a load of C99 stuff */
241 #if defined(__cplusplus) && __cplusplus >= 201103L
242 #define __LONG_LONG_SUPPORTED
243 #ifndef __STDC_LIMIT_MACROS
244 #define __STDC_LIMIT_MACROS
246 #ifndef __STDC_CONSTANT_MACROS
247 #define __STDC_CONSTANT_MACROS
252 * GCC 2.95 and later provides `__restrict' as an extension to C90 to support
253 * the C99-specific `restrict' type qualifier. We happen to use `__restrict'
254 * as a way to define the `restrict' type qualifier without disturbing older
255 * software that is unaware of C99 keywords.
257 #if !__GNUC_PREREQ__(2, 95)
258 #if __STDC_VERSION__ < 199901
261 #define __restrict restrict
266 * C99 allows to declare arrays as non-overlapping.
268 #if __GNUC_PREREQ__(3, 1) && !defined(__GNUG__)
269 #define __restrict_arr __restrict
272 #define __restrict_arr
274 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901
275 #define __restrict_arr restrict
277 #define __restrict_arr
283 * GNU C version 2.96 adds explicit branch prediction so that
284 * the CPU back-end can hint the processor and also so that
285 * code blocks can be reordered such that the predicted path
286 * sees a more linear flow, thus improving cache behavior, etc.
288 * The following two macros provide us with a way to utilize this
289 * compiler feature. Use __predict_true() if you expect the expression
290 * to evaluate to true, and __predict_false() if you expect the
291 * expression to evaluate to false.
293 * A few notes about usage:
295 * * Generally, __predict_false() error condition checks (unless
296 * you have some _strong_ reason to do otherwise, in which case
297 * document it), and/or __predict_true() `no-error' condition
298 * checks, assuming you want to optimize for the no-error case.
300 * * Other than that, if you don't know the likelihood of a test
301 * succeeding from empirical or other `hard' evidence, don't
304 * * These are meant to be used in places that are run `a lot'.
305 * It is wasteful to make predictions in code that is run
306 * seldomly (e.g. at subsystem initialization time) as the
307 * basic block reordering that this affects can often generate
310 #if __GNUC_PREREQ__(2, 96)
311 #define __predict_true(exp) __builtin_expect((exp), 1)
312 #define __predict_false(exp) __builtin_expect((exp), 0)
314 #define __predict_true(exp) (exp)
315 #define __predict_false(exp) (exp)
319 * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
322 #if __GNUC_PREREQ__(4, 1)
323 #define __offsetof(type, field) __builtin_offsetof(type, field)
326 #define __offsetof(type, field) \
327 ((__size_t)(__uintptr_t)((const volatile void *)&((type *)0)->field))
329 #define __offsetof(type, field) \
330 (__offsetof__ (reinterpret_cast <__size_t> \
331 (&reinterpret_cast <const volatile char &> \
332 (static_cast<type *> (0)->field))))
337 * Compiler-dependent macros to declare that functions take printf-like
338 * or scanf-like arguments. They are null except for versions of gcc
339 * that are known to support the features properly (old versions of gcc-2
340 * didn't permit keeping the keywords out of the application namespace).
342 * The printf0like macro for GCC 2 uses DragonFly specific compiler extensions.
344 #if !__GNUC_PREREQ__(2, 7)
345 #define __printflike(fmtarg, firstvararg)
346 #define __scanflike(fmtarg, firstvararg)
347 #define __printf0like(fmtarg, firstvararg)
348 #define __format_arg(fmtarg)
349 #define __strfmonlike(fmtarg, firstvararg)
350 #define __strftimelike(fmtarg, firstvararg)
352 #elif __GNUC_PREREQ__(3, 0)
353 #define __printflike(fmtarg, firstvararg) \
354 __attribute__((__nonnull__(fmtarg), \
355 __format__ (__printf__, fmtarg, firstvararg)))
356 #define __printf0like(fmtarg, firstvararg) \
357 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
358 #define __scanflike(fmtarg, firstvararg) \
359 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
360 #define __format_arg(fmtarg) \
361 __attribute__((__format_arg__ (fmtarg)))
362 #define __strfmonlike(fmtarg, firstvararg) \
363 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))
364 #define __strftimelike(fmtarg, firstvararg) \
365 __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
368 #define __printflike(fmtarg, firstvararg) \
369 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
370 #define __printf0like(fmtarg, firstvararg) \
371 __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
372 #define __scanflike(fmtarg, firstvararg) \
373 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
374 #define __format_arg(fmtarg) \
375 __attribute__((__format_arg__ (fmtarg)))
376 #define __strfmonlike(fmtarg, firstvararg) \
377 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))
378 #define __strftimelike(fmtarg, firstvararg) \
379 __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
382 #if !__GNUC_PREREQ__(3, 0)
383 #define __ARRAY_ZERO 0
388 #if __GNUC_PREREQ__(4, 0)
389 #define __dso_public __attribute__((__visibility__("default")))
390 #define __dso_hidden __attribute__((__visibility__("hidden")))
397 * A convenient constructor macro, GCC 4.3.0 added priority support to
398 * constructors, provide a compatible interface for both.
400 #if __GNUC_PREREQ__(4, 3)
401 #define __constructor(prio) __attribute__((constructor(prio)))
403 #define __constructor(prio) __attribute__((constructor))
407 * Handy GCC based macros:
411 * The __cachealign macro can be used for cache line aligning structures
412 * of small to medium size. It aligns the particular structure or
413 * storage type to a system default cache line alignment, thus giving us
414 * a much more better cache utilization by making the hardware work at
415 * its best burst speeds.
419 * The __usereg macro can/should be used when a function contains
420 * arguments not more than 3. It can be very useful to us due to the
421 * message-passing nature of the kernel.
423 * !!NOTE - USAGE INFORMATION!!
425 * The __cachealign macro should not be used for data structures that are
426 * as big struct proc, struct vnode, struct thread, and other structs which
427 * are as big as them; simply because it will be useless in that case.
429 * The __usereg macro should be used whenever possible, i.e., when a function
430 * does not exceed more than 3 arguments, and should not be used for vararg
433 * In other words, AVOID MISUSE OF THESE MACROS. :-)
436 #define __cachealign __attribute__((__aligned__(__VM_CACHELINE_SIZE)))
437 #define __usereg __attribute__((__regparm__(3)))
444 #define __strong_reference(sym,aliassym) \
445 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)))
446 #define __weak_reference(sym,aliassym) \
447 __strong_reference(sym,aliassym) __attribute__ ((__weak__))
448 #define __weak_reference_asm(sym,alias) \
449 __asm__(".weak " #alias); \
450 __asm__(".equ " #alias ", " #sym)
451 #define __warn_references(sym,msg) \
452 __asm__(".section .gnu.warning." #sym); \
453 __asm__(".asciz \"" msg "\""); \
455 #define __sym_compat(sym,impl,verid) \
456 __asm__(".symver " #impl ", " #sym "@" #verid)
457 #define __sym_default(sym,impl,verid) \
458 __asm__(".symver " #impl ", " #sym "@@@" #verid)
459 #endif /* __GNUC__ */
461 #if defined(__GNUC__)
462 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
466 #define __RCSID(s) struct __hack
469 #ifndef __RCSID_SOURCE
470 #define __RCSID_SOURCE(s) struct __hack
474 #define __SCCSID(s) struct __hack
478 #define __FBSDID(s) struct __hack
482 #define __COPYRIGHT(s) struct __hack
486 #define __DECONST(type, var) ((type)(__uintptr_t)(const void *)(var))
490 #define __DEVOLATILE(type, var) ((type)(__uintptr_t)(volatile void *)(var))
494 #define __DEQUALIFY(type, var) ((type)(__uintptr_t)(const volatile void *)(var))
498 * Keywords added in C11.
501 #if !__GNUC_PREREQ__(2, 95)
502 #define __alignof(x) __offsetof(struct { char __a; x __b; }, __b)
505 #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L
507 #if !__has_extension(c_alignas)
508 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \
509 __has_extension(cxx_alignas)
510 #define _Alignas(x) alignas(x)
512 /* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */
513 #define _Alignas(x) __aligned(x)
517 #if defined(__cplusplus) && __cplusplus >= 201103L
518 #define _Alignof(x) alignof(x)
520 #define _Alignof(x) __alignof(x)
523 #if !defined(_Noreturn)
524 #define _Noreturn __dead2
527 #if !__has_extension(c_static_assert)
528 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \
529 __has_extension(cxx_static_assert)
530 #define _Static_assert(x, y) static_assert(x, y)
531 #elif !__GNUC_PREREQ__(4, 6)
532 #define _Static_assert(x, y) struct __hack
534 #define CTASSERT(x) _CTASSERT(x, __LINE__)
535 #define _CTASSERT(x, y) __CTASSERT(x, y)
536 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
541 #endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */
543 #if defined(_KERNEL) && !defined(CTASSERT)
544 #define CTASSERT(x) _Static_assert(x, \
545 "compile-time assertion failed")
549 * Emulation of C11 _Generic(). Unlike the previously defined C11
550 * keywords, it is not possible to implement this using exactly the same
551 * syntax. Therefore implement something similar under the name
552 * __generic(). Unlike _Generic(), this macro can only distinguish
553 * between a single type, so it requires nested invocations to
554 * distinguish multiple cases.
557 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
558 #define __generic(expr, t, yes, no) \
559 _Generic(expr, t: yes, default: no)
560 #elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus)
561 #define __generic(expr, t, yes, no) \
562 __builtin_choose_expr( \
563 __builtin_types_compatible_p(__typeof(expr), t), yes, no)
567 * POSIX.1 requires that the macros we test be defined before any standard
568 * header file is included.
570 * Here's a quick run-down of the versions:
571 * defined(_POSIX_SOURCE) 1003.1-1988
572 * _POSIX_C_SOURCE == 1 1003.1-1990
573 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option
574 * _POSIX_C_SOURCE == 199309 1003.1b-1993
575 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995,
576 * and the omnibus ISO/IEC 9945-1: 1996
577 * _POSIX_C_SOURCE == 200112 1003.1-2001
578 * _POSIX_C_SOURCE == 200809 1003.1-2008
580 * In addition, the X/Open Portability Guide, which is now the Single UNIX
581 * Specification, defines a feature-test macro which indicates the version of
582 * that specification, and which subsumes _POSIX_C_SOURCE.
584 * Our macros begin with two underscores to avoid namespace screwage.
587 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
588 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 1
589 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */
590 #define _POSIX_C_SOURCE 199009
593 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
594 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 2
595 #undef _POSIX_C_SOURCE
596 #define _POSIX_C_SOURCE 199209
599 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */
601 #if _XOPEN_SOURCE - 0 >= 700
602 #define __XSI_VISIBLE 700
603 #undef _POSIX_C_SOURCE
604 #define _POSIX_C_SOURCE 200809
605 #elif _XOPEN_SOURCE - 0 >= 600
606 #define __XSI_VISIBLE 600
607 #undef _POSIX_C_SOURCE
608 #define _POSIX_C_SOURCE 200112
609 #elif _XOPEN_SOURCE - 0 >= 500
610 #define __XSI_VISIBLE 500
611 #undef _POSIX_C_SOURCE
612 #define _POSIX_C_SOURCE 199506
617 * Deal with all versions of POSIX. The ordering relative to the tests above is
620 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
621 #define _POSIX_C_SOURCE 198808
623 #ifdef _POSIX_C_SOURCE
624 #if (_POSIX_C_SOURCE - 0) >= 200809
625 #define __POSIX_VISIBLE 200809
626 #define __ISO_C_VISIBLE 1999
627 #elif (_POSIX_C_SOURCE - 0) >= 200112
628 #define __POSIX_VISIBLE 200112
629 #define __ISO_C_VISIBLE 1999
630 #elif (_POSIX_C_SOURCE - 0) >= 199506
631 #define __POSIX_VISIBLE 199506
632 #define __ISO_C_VISIBLE 1990
633 #elif (_POSIX_C_SOURCE - 0) >= 199309
634 #define __POSIX_VISIBLE 199309
635 #define __ISO_C_VISIBLE 1990
636 #elif (_POSIX_C_SOURCE - 0) >= 199209
637 #define __POSIX_VISIBLE 199209
638 #define __ISO_C_VISIBLE 1990
639 #elif (_POSIX_C_SOURCE - 0) >= 199009
640 #define __POSIX_VISIBLE 199009
641 #define __ISO_C_VISIBLE 1990
643 #define __POSIX_VISIBLE 198808
644 #define __ISO_C_VISIBLE 0
645 #endif /* _POSIX_C_SOURCE */
648 * Deal with _ANSI_SOURCE:
649 * If it is defined, and no other compilation environment is explicitly
650 * requested, then define our internal feature-test macros to zero. This
651 * makes no difference to the preprocessor (undefined symbols in preprocessing
652 * expressions are defined to have value zero), but makes it more convenient for
653 * a test program to print out the values.
655 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
656 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
657 * environment (and in fact we will never get here).
659 #if defined(_ANSI_SOURCE) /* Hide almost everything. */
660 #define __POSIX_VISIBLE 0
661 #define __XSI_VISIBLE 0
662 #define __BSD_VISIBLE 0
663 #define __ISO_C_VISIBLE 1990
664 #define __EXT1_VISIBLE 0
665 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */
666 #define __POSIX_VISIBLE 0
667 #define __XSI_VISIBLE 0
668 #define __BSD_VISIBLE 0
669 #define __ISO_C_VISIBLE 1999
670 #define __EXT1_VISIBLE 0
671 #elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */
672 #define __POSIX_VISIBLE 0
673 #define __XSI_VISIBLE 0
674 #define __BSD_VISIBLE 0
675 #define __ISO_C_VISIBLE 2011
676 #define __EXT1_VISIBLE 0
677 #else /* Default environment: show everything. */
678 #define __POSIX_VISIBLE 200809
679 #define __XSI_VISIBLE 700
680 #define __BSD_VISIBLE 1
681 #define __ISO_C_VISIBLE 2011
682 #define __EXT1_VISIBLE 1
686 /* User override __EXT1_VISIBLE */
687 #if defined(__STDC_WANT_LIB_EXT1__)
688 #undef __EXT1_VISIBLE
689 #if __STDC_WANT_LIB_EXT1__
690 #define __EXT1_VISIBLE 1
692 #define __EXT1_VISIBLE 0
694 #endif /* __STDC_WANT_LIB_EXT1__ */
696 #ifndef __BSD_VISIBLE
697 #define __BSD_VISIBLE 0
699 #ifndef __EXT1_VISIBLE
700 #define __EXT1_VISIBLE 0
704 * GLOBL macro exists to preserve __start_set_* and __stop_set_* sections
705 * of kernel modules which are discarded from binutils 2.17.50+ otherwise.
708 #define __GLOBL1(sym) __asm__(".globl " #sym)
709 #define __GLOBL(sym) __GLOBL1(sym)
711 #endif /* !_SYS_CDEFS_H_ */