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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
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
40 * Testing against Clang-specific extensions.
43 #ifndef __has_attribute
44 #define __has_attribute(x) 0
46 #ifndef __has_extension
47 #define __has_extension __has_feature
50 #define __has_feature(x) 0
53 #define __has_include(x) 0
56 #define __has_builtin(x) 0
59 #if defined(__cplusplus)
60 #define __BEGIN_DECLS extern "C" {
68 * This code has been put in place to help reduce the addition of
69 * compiler specific defines in FreeBSD code. It helps to aid in
70 * having a compiler-agnostic source tree.
73 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
75 #if __GNUC__ >= 3 || defined(__INTEL_COMPILER)
76 #define __GNUCLIKE_ASM 3
77 #define __GNUCLIKE_MATH_BUILTIN_CONSTANTS
79 #define __GNUCLIKE_ASM 2
81 #define __GNUCLIKE___TYPEOF 1
82 #define __GNUCLIKE___OFFSETOF 1
83 #define __GNUCLIKE___SECTION 1
85 #ifndef __INTEL_COMPILER
86 # define __GNUCLIKE_CTOR_SECTION_HANDLING 1
89 #define __GNUCLIKE_BUILTIN_CONSTANT_P 1
90 # if defined(__INTEL_COMPILER) && defined(__cplusplus) \
91 && __INTEL_COMPILER < 800
92 # undef __GNUCLIKE_BUILTIN_CONSTANT_P
95 #if (__GNUC_MINOR__ > 95 || __GNUC__ >= 3)
96 # define __GNUCLIKE_BUILTIN_VARARGS 1
97 # define __GNUCLIKE_BUILTIN_STDARG 1
98 # define __GNUCLIKE_BUILTIN_VAALIST 1
101 #if defined(__GNUC__)
102 # define __GNUC_VA_LIST_COMPATIBILITY 1
106 * Compiler memory barriers, specific to gcc and clang.
108 #if defined(__GNUC__)
109 #define __compiler_membar() __asm __volatile(" " : : : "memory")
112 #ifndef __INTEL_COMPILER
113 # define __GNUCLIKE_BUILTIN_NEXT_ARG 1
114 # define __GNUCLIKE_MATH_BUILTIN_RELOPS
117 #define __GNUCLIKE_BUILTIN_MEMCPY 1
119 /* XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced */
120 #define __CC_SUPPORTS_INLINE 1
121 #define __CC_SUPPORTS___INLINE 1
122 #define __CC_SUPPORTS___INLINE__ 1
124 #define __CC_SUPPORTS___FUNC__ 1
125 #define __CC_SUPPORTS_WARNING 1
127 #define __CC_SUPPORTS_VARADIC_XXX 1 /* see varargs.h */
129 #define __CC_SUPPORTS_DYNAMIC_ARRAY_INIT 1
131 #endif /* __GNUC__ || __INTEL_COMPILER */
134 * Macro to test if we're using a specific version of gcc or later.
136 #if defined(__GNUC__) && !defined(__INTEL_COMPILER)
137 #define __GNUC_PREREQ__(ma, mi) \
138 (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi))
140 #define __GNUC_PREREQ__(ma, mi) 0
144 * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
145 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
146 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
147 * mode -- there must be no spaces between its arguments, and for nested
148 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also
149 * concatenate double-quoted strings produced by the __STRING macro, but
150 * this only works with ANSI C.
152 * __XSTRING is like __STRING, but it expands any macros in its argument
153 * first. It is only available with ANSI C.
155 #if defined(__STDC__) || defined(__cplusplus)
156 #define __P(protos) protos /* full-blown ANSI C */
157 #define __CONCAT1(x,y) x ## y
158 #define __CONCAT(x,y) __CONCAT1(x,y)
159 #define __STRING(x) #x /* stringify without expanding x */
160 #define __XSTRING(x) __STRING(x) /* expand x, then stringify */
162 #define __const const /* define reserved names to standard */
163 #define __signed signed
164 #define __volatile volatile
165 #if defined(__cplusplus)
166 #define __inline inline /* convert to C++ keyword */
168 #if !(defined(__CC_SUPPORTS___INLINE))
169 #define __inline /* delete GCC keyword */
170 #endif /* ! __CC_SUPPORTS___INLINE */
171 #endif /* !__cplusplus */
173 #else /* !(__STDC__ || __cplusplus) */
174 #define __P(protos) () /* traditional C preprocessor */
175 #define __CONCAT(x,y) x/**/y
176 #define __STRING(x) "x"
178 #if !defined(__CC_SUPPORTS___INLINE)
179 #define __const /* delete pseudo-ANSI C keywords */
184 * In non-ANSI C environments, new programs will want ANSI-only C keywords
185 * deleted from the program and old programs will want them left alone.
186 * When using a compiler other than gcc, programs using the ANSI C keywords
187 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
188 * When using "gcc -traditional", we assume that this is the intent; if
189 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
191 #ifndef NO_ANSI_KEYWORDS
192 #define const /* delete ANSI C keywords */
196 #endif /* !NO_ANSI_KEYWORDS */
197 #endif /* !__CC_SUPPORTS___INLINE */
198 #endif /* !(__STDC__ || __cplusplus) */
201 * Compiler-dependent macros to help declare dead (non-returning) and
202 * pure (no side effects) functions, and unused variables. They are
203 * null except for versions of gcc that are known to support the features
204 * properly (old versions of gcc-2 supported the dead and pure features
205 * in a different (wrong) way). If we do not provide an implementation
206 * for a given compiler, let the compile fail if it is told to use
207 * a feature that we cannot live without.
216 #define __weak_symbol
218 #define __weak_symbol __attribute__((__weak__))
219 #if !__GNUC_PREREQ__(2, 5) && !defined(__INTEL_COMPILER)
224 #if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7 && !defined(__INTEL_COMPILER)
225 #define __dead2 __attribute__((__noreturn__))
226 #define __pure2 __attribute__((__const__))
228 /* XXX Find out what to do for __packed, __aligned and __section */
230 #if __GNUC_PREREQ__(2, 7)
231 #define __dead2 __attribute__((__noreturn__))
232 #define __pure2 __attribute__((__const__))
233 #define __unused __attribute__((__unused__))
234 #define __used __attribute__((__used__))
235 #define __packed __attribute__((__packed__))
236 #define __aligned(x) __attribute__((__aligned__(x)))
237 #define __section(x) __attribute__((__section__(x)))
239 #if defined(__INTEL_COMPILER)
240 #define __dead2 __attribute__((__noreturn__))
241 #define __pure2 __attribute__((__const__))
242 #define __unused __attribute__((__unused__))
243 #define __used __attribute__((__used__))
244 #define __packed __attribute__((__packed__))
245 #define __aligned(x) __attribute__((__aligned__(x)))
246 #define __section(x) __attribute__((__section__(x)))
250 #if !__GNUC_PREREQ__(2, 95)
251 #define __alignof(x) __offsetof(struct { char __a; x __b; }, __b)
255 * Keywords added in C11.
258 #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L || defined(lint)
260 #if !__has_extension(c_alignas)
261 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \
262 __has_extension(cxx_alignas)
263 #define _Alignas(x) alignas(x)
265 /* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */
266 #define _Alignas(x) __aligned(x)
270 #if defined(__cplusplus) && __cplusplus >= 201103L
271 #define _Alignof(x) alignof(x)
273 #define _Alignof(x) __alignof(x)
276 #if !defined(__cplusplus) && !__has_extension(c_atomic) && \
277 !__has_extension(cxx_atomic)
279 * No native support for _Atomic(). Place object in structure to prevent
280 * most forms of direct non-atomic access.
282 #define _Atomic(T) struct { T volatile __val; }
285 #if defined(__cplusplus) && __cplusplus >= 201103L
286 #define _Noreturn [[noreturn]]
288 #define _Noreturn __dead2
291 #if !__has_extension(c_static_assert)
292 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \
293 __has_extension(cxx_static_assert)
294 #define _Static_assert(x, y) static_assert(x, y)
295 #elif defined(__COUNTER__)
296 #define _Static_assert(x, y) __Static_assert(x, __COUNTER__)
297 #define __Static_assert(x, y) ___Static_assert(x, y)
298 #define ___Static_assert(x, y) typedef char __assert_ ## y[(x) ? 1 : -1] \
301 #define _Static_assert(x, y) struct __hack
305 #if !__has_extension(c_thread_local)
306 /* XXX: Change this to test against C++11 when clang in base supports it. */
307 #if /* (defined(__cplusplus) && __cplusplus >= 201103L) || */ \
308 __has_extension(cxx_thread_local)
309 #define _Thread_local thread_local
311 #define _Thread_local __thread
315 #endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */
318 * Emulation of C11 _Generic(). Unlike the previously defined C11
319 * keywords, it is not possible to implement this using exactly the same
320 * syntax. Therefore implement something similar under the name
321 * __generic(). Unlike _Generic(), this macro can only distinguish
322 * between a single type, so it requires nested invocations to
323 * distinguish multiple cases.
326 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
327 #define __generic(expr, t, yes, no) \
328 _Generic(expr, t: yes, default: no)
329 #elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus)
330 #define __generic(expr, t, yes, no) \
331 __builtin_choose_expr( \
332 __builtin_types_compatible_p(__typeof(expr), t), yes, no)
336 * C99 Static array indices in function parameter declarations. Syntax such as:
337 * void bar(int myArray[static 10]);
338 * is allowed in C99 but not in C++. Define __min_size appropriately so
339 * headers using it can be compiled in either language. Use like this:
340 * void bar(int myArray[__min_size(10)]);
342 #if !defined(__cplusplus) && \
343 (!defined(__STDC_VERSION) || (__STDC_VERSION__ >= 199901))
344 #define __min_size(x) static (x)
346 #define __min_size(x) (x)
349 #if __GNUC_PREREQ__(2, 96)
350 #define __malloc_like __attribute__((__malloc__))
351 #define __pure __attribute__((__pure__))
353 #define __malloc_like
357 #if __GNUC_PREREQ__(3, 1) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800)
358 #define __always_inline __attribute__((__always_inline__))
360 #define __always_inline
363 #if __GNUC_PREREQ__(3, 1)
364 #define __noinline __attribute__ ((__noinline__))
369 #if __GNUC_PREREQ__(3, 3)
370 #define __nonnull(x) __attribute__((__nonnull__(x)))
375 #if __GNUC_PREREQ__(3, 4)
376 #define __fastcall __attribute__((__fastcall__))
377 #define __result_use_check __attribute__((__warn_unused_result__))
380 #define __result_use_check
383 #if __GNUC_PREREQ__(4, 1)
384 #define __returns_twice __attribute__((__returns_twice__))
386 #define __returns_twice
389 /* XXX: should use `#if __STDC_VERSION__ < 199901'. */
390 #if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER)
391 #define __func__ NULL
394 #if (defined(__INTEL_COMPILER) || (defined(__GNUC__) && __GNUC__ >= 2)) && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
395 #define __LONG_LONG_SUPPORTED
398 /* C++11 exposes a load of C99 stuff */
399 #if defined(__cplusplus) && __cplusplus >= 201103L
400 #define __LONG_LONG_SUPPORTED
401 #ifndef __STDC_LIMIT_MACROS
402 #define __STDC_LIMIT_MACROS
404 #ifndef __STDC_CONSTANT_MACROS
405 #define __STDC_CONSTANT_MACROS
410 * GCC 2.95 provides `__restrict' as an extension to C90 to support the
411 * C99-specific `restrict' type qualifier. We happen to use `__restrict' as
412 * a way to define the `restrict' type qualifier without disturbing older
413 * software that is unaware of C99 keywords.
415 #if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)
416 #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901 || defined(lint)
419 #define __restrict restrict
424 * GNU C version 2.96 adds explicit branch prediction so that
425 * the CPU back-end can hint the processor and also so that
426 * code blocks can be reordered such that the predicted path
427 * sees a more linear flow, thus improving cache behavior, etc.
429 * The following two macros provide us with a way to utilize this
430 * compiler feature. Use __predict_true() if you expect the expression
431 * to evaluate to true, and __predict_false() if you expect the
432 * expression to evaluate to false.
434 * A few notes about usage:
436 * * Generally, __predict_false() error condition checks (unless
437 * you have some _strong_ reason to do otherwise, in which case
438 * document it), and/or __predict_true() `no-error' condition
439 * checks, assuming you want to optimize for the no-error case.
441 * * Other than that, if you don't know the likelihood of a test
442 * succeeding from empirical or other `hard' evidence, don't
445 * * These are meant to be used in places that are run `a lot'.
446 * It is wasteful to make predictions in code that is run
447 * seldomly (e.g. at subsystem initialization time) as the
448 * basic block reordering that this affects can often generate
451 #if __GNUC_PREREQ__(2, 96)
452 #define __predict_true(exp) __builtin_expect((exp), 1)
453 #define __predict_false(exp) __builtin_expect((exp), 0)
455 #define __predict_true(exp) (exp)
456 #define __predict_false(exp) (exp)
459 #if __GNUC_PREREQ__(4, 0)
460 #define __hidden __attribute__((__visibility__("hidden")))
461 #define __exported __attribute__((__visibility__("default")))
468 * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
471 #if __GNUC_PREREQ__(4, 1)
472 #define __offsetof(type, field) __builtin_offsetof(type, field)
475 #define __offsetof(type, field) \
476 ((__size_t)(__uintptr_t)((const volatile void *)&((type *)0)->field))
478 #define __offsetof(type, field) \
479 (__offsetof__ (reinterpret_cast <__size_t> \
480 (&reinterpret_cast <const volatile char &> \
481 (static_cast<type *> (0)->field))))
484 #define __rangeof(type, start, end) \
485 (__offsetof(type, end) - __offsetof(type, start))
488 * Given the pointer x to the member m of the struct s, return
489 * a pointer to the containing structure. When using GCC, we first
490 * assign pointer x to a local variable, to check that its type is
491 * compatible with member m.
493 #if __GNUC_PREREQ__(3, 1)
494 #define __containerof(x, s, m) ({ \
495 const volatile __typeof(((s *)0)->m) *__x = (x); \
496 __DEQUALIFY(s *, (const volatile char *)__x - __offsetof(s, m));\
499 #define __containerof(x, s, m) \
500 __DEQUALIFY(s *, (const volatile char *)(x) - __offsetof(s, m))
504 * Compiler-dependent macros to declare that functions take printf-like
505 * or scanf-like arguments. They are null except for versions of gcc
506 * that are known to support the features properly (old versions of gcc-2
507 * didn't permit keeping the keywords out of the application namespace).
509 #if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER)
510 #define __printflike(fmtarg, firstvararg)
511 #define __scanflike(fmtarg, firstvararg)
512 #define __format_arg(fmtarg)
513 #define __strfmonlike(fmtarg, firstvararg)
514 #define __strftimelike(fmtarg, firstvararg)
516 #define __printflike(fmtarg, firstvararg) \
517 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
518 #define __scanflike(fmtarg, firstvararg) \
519 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
520 #define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg)))
521 #define __strfmonlike(fmtarg, firstvararg) \
522 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))
523 #define __strftimelike(fmtarg, firstvararg) \
524 __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
527 /* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
528 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 300001 && \
529 defined(__GNUC__) && !defined(__INTEL_COMPILER)
530 #define __printf0like(fmtarg, firstvararg) \
531 __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
533 #define __printf0like(fmtarg, firstvararg)
536 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
537 #ifndef __INTEL_COMPILER
538 #define __strong_reference(sym,aliassym) \
539 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)))
542 #define __weak_reference(sym,alias) \
543 __asm__(".weak " #alias); \
544 __asm__(".equ " #alias ", " #sym)
545 #define __warn_references(sym,msg) \
546 __asm__(".section .gnu.warning." #sym); \
547 __asm__(".asciz \"" msg "\""); \
549 #define __sym_compat(sym,impl,verid) \
550 __asm__(".symver " #impl ", " #sym "@" #verid)
551 #define __sym_default(sym,impl,verid) \
552 __asm__(".symver " #impl ", " #sym "@@" #verid)
554 #define __weak_reference(sym,alias) \
555 __asm__(".weak alias"); \
556 __asm__(".equ alias, sym")
557 #define __warn_references(sym,msg) \
558 __asm__(".section .gnu.warning.sym"); \
559 __asm__(".asciz \"msg\""); \
561 #define __sym_compat(sym,impl,verid) \
562 __asm__(".symver impl, sym@verid")
563 #define __sym_default(impl,sym,verid) \
564 __asm__(".symver impl, sym@@verid")
565 #endif /* __STDC__ */
566 #endif /* __GNUC__ || __INTEL_COMPILER */
568 #define __GLOBL1(sym) __asm__(".globl " #sym)
569 #define __GLOBL(sym) __GLOBL1(sym)
571 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
572 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
575 * The following definition might not work well if used in header files,
576 * but it should be better than nothing. If you want a "do nothing"
577 * version, then it should generate some harmless declaration, such as:
578 * #define __IDSTRING(name,string) struct __hack
580 #define __IDSTRING(name,string) static const char name[] __unused = string
584 * Embed the rcs id of a source file in the resulting library. Note that in
585 * more recent ELF binutils, we use .ident allowing the ID to be stripped.
587 * __FBSDID("$FreeBSD$");
590 #if !defined(lint) && !defined(STRIP_FBSDID)
591 #define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
593 #define __FBSDID(s) struct __hack
599 #define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
601 #define __RCSID(s) struct __hack
605 #ifndef __RCSID_SOURCE
606 #ifndef NO__RCSID_SOURCE
607 #define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s)
609 #define __RCSID_SOURCE(s) struct __hack
615 #define __SCCSID(s) __IDSTRING(__CONCAT(__sccsid_,__LINE__),s)
617 #define __SCCSID(s) struct __hack
622 #ifndef NO__COPYRIGHT
623 #define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s)
625 #define __COPYRIGHT(s) struct __hack
630 #define __DECONST(type, var) ((type)(__uintptr_t)(const void *)(var))
634 #define __DEVOLATILE(type, var) ((type)(__uintptr_t)(volatile void *)(var))
638 #define __DEQUALIFY(type, var) ((type)(__uintptr_t)(const volatile void *)(var))
642 * The following definitions are an extension of the behavior originally
643 * implemented in <sys/_posix.h>, but with a different level of granularity.
644 * POSIX.1 requires that the macros we test be defined before any standard
645 * header file is included.
647 * Here's a quick run-down of the versions:
648 * defined(_POSIX_SOURCE) 1003.1-1988
649 * _POSIX_C_SOURCE == 1 1003.1-1990
650 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option
651 * _POSIX_C_SOURCE == 199309 1003.1b-1993
652 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995,
653 * and the omnibus ISO/IEC 9945-1: 1996
654 * _POSIX_C_SOURCE == 200112 1003.1-2001
655 * _POSIX_C_SOURCE == 200809 1003.1-2008
657 * In addition, the X/Open Portability Guide, which is now the Single UNIX
658 * Specification, defines a feature-test macro which indicates the version of
659 * that specification, and which subsumes _POSIX_C_SOURCE.
661 * Our macros begin with two underscores to avoid namespace screwage.
664 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
665 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1
666 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */
667 #define _POSIX_C_SOURCE 199009
670 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
671 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2
672 #undef _POSIX_C_SOURCE
673 #define _POSIX_C_SOURCE 199209
676 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */
678 #if _XOPEN_SOURCE - 0 >= 700
679 #define __XSI_VISIBLE 700
680 #undef _POSIX_C_SOURCE
681 #define _POSIX_C_SOURCE 200809
682 #elif _XOPEN_SOURCE - 0 >= 600
683 #define __XSI_VISIBLE 600
684 #undef _POSIX_C_SOURCE
685 #define _POSIX_C_SOURCE 200112
686 #elif _XOPEN_SOURCE - 0 >= 500
687 #define __XSI_VISIBLE 500
688 #undef _POSIX_C_SOURCE
689 #define _POSIX_C_SOURCE 199506
694 * Deal with all versions of POSIX. The ordering relative to the tests above is
697 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
698 #define _POSIX_C_SOURCE 198808
700 #ifdef _POSIX_C_SOURCE
701 #if _POSIX_C_SOURCE >= 200809
702 #define __POSIX_VISIBLE 200809
703 #define __ISO_C_VISIBLE 1999
704 #elif _POSIX_C_SOURCE >= 200112
705 #define __POSIX_VISIBLE 200112
706 #define __ISO_C_VISIBLE 1999
707 #elif _POSIX_C_SOURCE >= 199506
708 #define __POSIX_VISIBLE 199506
709 #define __ISO_C_VISIBLE 1990
710 #elif _POSIX_C_SOURCE >= 199309
711 #define __POSIX_VISIBLE 199309
712 #define __ISO_C_VISIBLE 1990
713 #elif _POSIX_C_SOURCE >= 199209
714 #define __POSIX_VISIBLE 199209
715 #define __ISO_C_VISIBLE 1990
716 #elif _POSIX_C_SOURCE >= 199009
717 #define __POSIX_VISIBLE 199009
718 #define __ISO_C_VISIBLE 1990
720 #define __POSIX_VISIBLE 198808
721 #define __ISO_C_VISIBLE 0
722 #endif /* _POSIX_C_SOURCE */
725 * Deal with _ANSI_SOURCE:
726 * If it is defined, and no other compilation environment is explicitly
727 * requested, then define our internal feature-test macros to zero. This
728 * makes no difference to the preprocessor (undefined symbols in preprocessing
729 * expressions are defined to have value zero), but makes it more convenient for
730 * a test program to print out the values.
732 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
733 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
734 * environment (and in fact we will never get here).
736 #if defined(_ANSI_SOURCE) /* Hide almost everything. */
737 #define __POSIX_VISIBLE 0
738 #define __XSI_VISIBLE 0
739 #define __BSD_VISIBLE 0
740 #define __ISO_C_VISIBLE 1990
741 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */
742 #define __POSIX_VISIBLE 0
743 #define __XSI_VISIBLE 0
744 #define __BSD_VISIBLE 0
745 #define __ISO_C_VISIBLE 1999
746 #elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */
747 #define __POSIX_VISIBLE 0
748 #define __XSI_VISIBLE 0
749 #define __BSD_VISIBLE 0
750 #define __ISO_C_VISIBLE 2011
751 #else /* Default environment: show everything. */
752 #define __POSIX_VISIBLE 200809
753 #define __XSI_VISIBLE 700
754 #define __BSD_VISIBLE 1
755 #define __ISO_C_VISIBLE 2011
759 #if defined(__mips) || defined(__powerpc64__)
763 #endif /* !_SYS_CDEFS_H_ */