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. 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.
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
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 * $DragonFly: src/sys/sys/cdefs.h,v 1.2 2003/06/17 04:28:58 dillon Exp $
44 #if defined(__cplusplus)
45 #define __BEGIN_DECLS extern "C" {
53 * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
54 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
55 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
56 * mode -- there must be no spaces between its arguments, and for nested
57 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also
58 * concatenate double-quoted strings produced by the __STRING macro, but
59 * this only works with ANSI C.
61 * __XSTRING is like __STRING, but it expands any macros in its argument
62 * first. It is only available with ANSI C.
64 #if defined(__STDC__) || defined(__cplusplus)
65 #define __P(protos) protos /* full-blown ANSI C */
66 #define __CONCAT1(x,y) x ## y
67 #define __CONCAT(x,y) __CONCAT1(x,y)
68 #define __STRING(x) #x /* stringify without expanding x */
69 #define __XSTRING(x) __STRING(x) /* expand x, then stringify */
71 #define __const const /* define reserved names to standard */
72 #define __signed signed
73 #define __volatile volatile
74 #if defined(__cplusplus)
75 #define __inline inline /* convert to C++ keyword */
78 #define __inline /* delete GCC keyword */
79 #endif /* !__GNUC__ */
80 #endif /* !__cplusplus */
82 #else /* !(__STDC__ || __cplusplus) */
83 #define __P(protos) () /* traditional C preprocessor */
84 #define __CONCAT(x,y) x/**/y
85 #define __STRING(x) "x"
88 #define __const /* delete pseudo-ANSI C keywords */
93 * In non-ANSI C environments, new programs will want ANSI-only C keywords
94 * deleted from the program and old programs will want them left alone.
95 * When using a compiler other than gcc, programs using the ANSI C keywords
96 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
97 * When using "gcc -traditional", we assume that this is the intent; if
98 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
100 #ifndef NO_ANSI_KEYWORDS
101 #define const /* delete ANSI C keywords */
105 #endif /* !NO_ANSI_KEYWORDS */
106 #endif /* !__GNUC__ */
107 #endif /* !(__STDC__ || __cplusplus) */
110 * Compiler-dependent macros to help declare dead (non-returning) and
111 * pure (no side effects) functions, and unused variables. They are
112 * null except for versions of gcc that are known to support the features
113 * properly (old versions of gcc-2 supported the dead and pure features
114 * in a different (wrong) way).
116 #if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 5
121 #if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7
122 #define __dead2 __attribute__((__noreturn__))
123 #define __pure2 __attribute__((__const__))
126 #if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ == 3
127 #define __dead2 __attribute__((__noreturn__))
128 #define __pure2 __attribute__((__const__))
129 #define __unused __attribute__((__unused__))
132 /* XXX: should use `#if __STDC_VERSION__ < 199901'. */
133 #if !(__GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3)
134 #define __func__ NULL
137 #if __GNUC__ >= 2 && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
138 #define __LONG_LONG_SUPPORTED
142 * GCC 2.95 provides `__restrict' as an extention to C90 to support the
143 * C99-specific `restrict' type qualifier. We happen to use `__restrict' as
144 * a way to define the `restrict' type qualifier without disturbing older
145 * software that is unaware of C99 keywords.
147 #if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)
148 #if __STDC_VERSION__ < 199901
151 #define __restrict restrict
156 * Compiler-dependent macros to declare that functions take printf-like
157 * or scanf-like arguments. They are null except for versions of gcc
158 * that are known to support the features properly (old versions of gcc-2
159 * didn't permit keeping the keywords out of the application namespace).
161 #if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 7
162 #define __printflike(fmtarg, firstvararg)
163 #define __scanflike(fmtarg, firstvararg)
165 #define __printflike(fmtarg, firstvararg) \
166 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
167 #define __scanflike(fmtarg, firstvararg) \
168 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
171 /* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
172 #if __FreeBSD_cc_version >= 300001
173 #define __printf0like(fmtarg, firstvararg) \
174 __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
176 #define __printf0like(fmtarg, firstvararg)
180 #define __strong_reference(sym,aliassym) \
181 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
184 #define __weak_reference(sym,alias) \
185 __asm__(".weak " #alias); \
186 __asm__(".equ " #alias ", " #sym)
187 #define __warn_references(sym,msg) \
188 __asm__(".section .gnu.warning." #sym); \
189 __asm__(".asciz \"" msg "\""); \
192 #define __weak_reference(sym,alias) \
193 __asm__(".weak alias"); \
194 __asm__(".equ alias, sym")
195 #define __warn_references(sym,msg) \
196 __asm__(".section .gnu.warning.sym"); \
197 __asm__(".asciz \"msg\""); \
199 #endif /* __STDC__ */
202 #define __weak_reference(sym,alias) \
203 __asm__(".stabs \"_" #alias "\",11,0,0,0"); \
204 __asm__(".stabs \"_" #sym "\",1,0,0,0")
205 #define __warn_references(sym,msg) \
206 __asm__(".stabs \"" msg "\",30,0,0,0"); \
207 __asm__(".stabs \"_" #sym "\",1,0,0,0")
209 #define __weak_reference(sym,alias) \
210 __asm__(".stabs \"_/**/alias\",11,0,0,0"); \
211 __asm__(".stabs \"_/**/sym\",1,0,0,0")
212 #define __warn_references(sym,msg) \
213 __asm__(".stabs msg,30,0,0,0"); \
214 __asm__(".stabs \"_/**/sym\",1,0,0,0")
215 #endif /* __STDC__ */
217 #endif /* __GNUC__ */
219 #if defined(__GNUC__) && defined(__ELF__)
220 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
222 #define __IDSTRING(name,string) static const char name[] __unused = string
226 #define __RCSID(s) __IDSTRING(rcsid,s)
230 * Embed the rcs id of a source file in the resulting library. Note that in
231 * more recent ELF binutils, we use .ident allowing the ID to be stripped.
233 * __FBSDID("$FreeBSD: src/sys/sys/cdefs.h,v 1.28.2.8 2002/09/18 04:05:13 mikeh Exp $");
236 #if !defined(lint) && !defined(STRIP_FBSDID)
237 #define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
239 #define __FBSDID(s) struct __hack
243 #ifndef __RCSID_SOURCE
244 #define __RCSID_SOURCE(s) __IDSTRING(rcsid_source,s)
248 #define __COPYRIGHT(s) __IDSTRING(copyright,s)
252 * The following definitions are an extension of the behavior originally
253 * implemented in <sys/_posix.h>, but with a different level of granularity.
254 * POSIX.1 requires that the macros we test be defined before any standard
255 * header file is included.
257 * Here's a quick run-down of the versions:
258 * defined(_POSIX_SOURCE) 1003.1-1988
259 * _POSIX_C_SOURCE == 1 1003.1-1990
260 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option
261 * _POSIX_C_SOURCE == 199309 1003.1b-1993
262 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995,
263 * and the omnibus ISO/IEC 9945-1: 1996
264 * _POSIX_C_SOURCE == 200112 1003.1-2001
266 * In addition, the X/Open Portability Guide, which is now the Single UNIX
267 * Specification, defines a feature-test macro which indicates the version of
268 * that specification, and which subsumes _POSIX_C_SOURCE.
270 * Our macros begin with two underscores to avoid namespace screwage.
273 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
274 #if _POSIX_C_SOURCE == 1
275 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */
276 #define _POSIX_C_SOURCE 199009
279 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
280 #if _POSIX_C_SOURCE == 2
281 #undef _POSIX_C_SOURCE
282 #define _POSIX_C_SOURCE 199209
285 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */
287 #if _XOPEN_SOURCE - 0 >= 600
288 #define __XSI_VISIBLE 600
289 #undef _POSIX_C_SOURCE
290 #define _POSIX_C_SOURCE 200112
291 #elif _XOPEN_SOURCE - 0 >= 500
292 #define __XSI_VISIBLE 500
293 #undef _POSIX_C_SOURCE
294 #define _POSIX_C_SOURCE 199506
299 * Deal with all versions of POSIX. The ordering relative to the tests above is
302 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
303 #define _POSIX_C_SOURCE 198808
305 #ifdef _POSIX_C_SOURCE
306 #if _POSIX_C_SOURCE >= 200112
307 #define __POSIX_VISIBLE 200112
308 #define __ISO_C_VISIBLE 1999
309 #elif _POSIX_C_SOURCE >= 199506
310 #define __POSIX_VISIBLE 199506
311 #define __ISO_C_VISIBLE 1990
312 #elif _POSIX_C_SOURCE >= 199309
313 #define __POSIX_VISIBLE 199309
314 #define __ISO_C_VISIBLE 1990
315 #elif _POSIX_C_SOURCE >= 199209
316 #define __POSIX_VISIBLE 199209
317 #define __ISO_C_VISIBLE 1990
318 #elif _POSIX_C_SOURCE >= 199009
319 #define __POSIX_VISIBLE 199009
320 #define __ISO_C_VISIBLE 1990
322 #define __POSIX_VISIBLE 198808
323 #define __ISO_C_VISIBLE 0
324 #endif /* _POSIX_C_SOURCE */
327 * Deal with _ANSI_SOURCE:
328 * If it is defined, and no other compilation environment is explicitly
329 * requested, then define our internal feature-test macros to zero. This
330 * makes no difference to the preprocessor (undefined symbols in preprocessing
331 * expressions are defined to have value zero), but makes it more convenient for
332 * a test program to print out the values.
334 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
335 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
336 * environment (and in fact we will never get here).
338 #ifdef _ANSI_SOURCE /* Hide almost everything. */
339 #define __POSIX_VISIBLE 0
340 #define __XSI_VISIBLE 0
341 #define __BSD_VISIBLE 0
342 #define __ISO_C_VISIBLE 1990
343 #else /* Default environment: show everything. */
344 #define __POSIX_VISIBLE 200112
345 #define __XSI_VISIBLE 600
346 #define __BSD_VISIBLE 1
347 #define __ISO_C_VISIBLE 1999
351 #endif /* !_SYS_CDEFS_H_ */