Set SYSDIR properly for sys/crypto and deep sys/dev/disk/... drivers by
[dragonfly.git] / sys / sys / cdefs.h
CommitLineData
984263bc
MD
1/*
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Berkeley Software Design, Inc.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
23 *
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
34 * SUCH DAMAGE.
35 *
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 $
41250c5d 38 * $DragonFly: src/sys/sys/cdefs.h,v 1.3 2003/08/14 18:28:47 dillon Exp $
984263bc
MD
39 */
40
41#ifndef _SYS_CDEFS_H_
42#define _SYS_CDEFS_H_
43
44#if defined(__cplusplus)
45#define __BEGIN_DECLS extern "C" {
46#define __END_DECLS }
47#else
48#define __BEGIN_DECLS
49#define __END_DECLS
50#endif
51
52/*
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.
60 *
61 * __XSTRING is like __STRING, but it expands any macros in its argument
62 * first. It is only available with ANSI C.
63 */
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 */
70
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 */
76#else
77#ifndef __GNUC__
78#define __inline /* delete GCC keyword */
79#endif /* !__GNUC__ */
80#endif /* !__cplusplus */
81
82#else /* !(__STDC__ || __cplusplus) */
83#define __P(protos) () /* traditional C preprocessor */
84#define __CONCAT(x,y) x/**/y
85#define __STRING(x) "x"
86
87#ifndef __GNUC__
88#define __const /* delete pseudo-ANSI C keywords */
89#define __inline
90#define __signed
91#define __volatile
92/*
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.
99 */
100#ifndef NO_ANSI_KEYWORDS
101#define const /* delete ANSI C keywords */
102#define inline
103#define signed
104#define volatile
105#endif /* !NO_ANSI_KEYWORDS */
106#endif /* !__GNUC__ */
107#endif /* !(__STDC__ || __cplusplus) */
108
109/*
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).
115 */
116#if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 5
117#define __dead2
118#define __pure2
119#define __unused
120#endif
121#if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7
122#define __dead2 __attribute__((__noreturn__))
123#define __pure2 __attribute__((__const__))
124#define __unused
125#endif
126#if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ == 3
127#define __dead2 __attribute__((__noreturn__))
128#define __pure2 __attribute__((__const__))
129#define __unused __attribute__((__unused__))
130#endif
131
132/* XXX: should use `#if __STDC_VERSION__ < 199901'. */
133#if !(__GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3)
134#define __func__ NULL
135#endif
136
137#if __GNUC__ >= 2 && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
138#define __LONG_LONG_SUPPORTED
139#endif
140
141/*
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.
146 */
147#if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)
148#if __STDC_VERSION__ < 199901
149#define __restrict
150#else
151#define __restrict restrict
152#endif
153#endif
154
155/*
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).
160 */
161#if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 7
162#define __printflike(fmtarg, firstvararg)
163#define __scanflike(fmtarg, firstvararg)
164#else
165#define __printflike(fmtarg, firstvararg) \
166 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
167#define __scanflike(fmtarg, firstvararg) \
168 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
169#endif
170
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)))
175#else
176#define __printf0like(fmtarg, firstvararg)
177#endif
178
179#ifdef __GNUC__
180#define __strong_reference(sym,aliassym) \
181 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
182#ifdef __ELF__
183#ifdef __STDC__
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 "\""); \
190 __asm__(".previous")
191#else
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\""); \
198 __asm__(".previous")
199#endif /* __STDC__ */
200#else /* !__ELF__ */
201#ifdef __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")
208#else
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__ */
216#endif /* __ELF__ */
217#endif /* __GNUC__ */
218
219#if defined(__GNUC__) && defined(__ELF__)
220#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
221#else
222#define __IDSTRING(name,string) static const char name[] __unused = string
223#endif
224
225#ifndef __RCSID
226#define __RCSID(s) __IDSTRING(rcsid,s)
227#endif
228
984263bc
MD
229#ifndef __RCSID_SOURCE
230#define __RCSID_SOURCE(s) __IDSTRING(rcsid_source,s)
231#endif
232
233#ifndef __COPYRIGHT
234#define __COPYRIGHT(s) __IDSTRING(copyright,s)
235#endif
236
237/*-
238 * The following definitions are an extension of the behavior originally
239 * implemented in <sys/_posix.h>, but with a different level of granularity.
240 * POSIX.1 requires that the macros we test be defined before any standard
241 * header file is included.
242 *
243 * Here's a quick run-down of the versions:
244 * defined(_POSIX_SOURCE) 1003.1-1988
245 * _POSIX_C_SOURCE == 1 1003.1-1990
246 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option
247 * _POSIX_C_SOURCE == 199309 1003.1b-1993
248 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995,
249 * and the omnibus ISO/IEC 9945-1: 1996
250 * _POSIX_C_SOURCE == 200112 1003.1-2001
251 *
252 * In addition, the X/Open Portability Guide, which is now the Single UNIX
253 * Specification, defines a feature-test macro which indicates the version of
254 * that specification, and which subsumes _POSIX_C_SOURCE.
255 *
256 * Our macros begin with two underscores to avoid namespace screwage.
257 */
258
259/* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
260#if _POSIX_C_SOURCE == 1
261#undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */
262#define _POSIX_C_SOURCE 199009
263#endif
264
265/* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
266#if _POSIX_C_SOURCE == 2
267#undef _POSIX_C_SOURCE
268#define _POSIX_C_SOURCE 199209
269#endif
270
271/* Deal with various X/Open Portability Guides and Single UNIX Spec. */
272#ifdef _XOPEN_SOURCE
273#if _XOPEN_SOURCE - 0 >= 600
274#define __XSI_VISIBLE 600
275#undef _POSIX_C_SOURCE
276#define _POSIX_C_SOURCE 200112
277#elif _XOPEN_SOURCE - 0 >= 500
278#define __XSI_VISIBLE 500
279#undef _POSIX_C_SOURCE
280#define _POSIX_C_SOURCE 199506
281#endif
282#endif
283
284/*
285 * Deal with all versions of POSIX. The ordering relative to the tests above is
286 * important.
287 */
288#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
289#define _POSIX_C_SOURCE 198808
290#endif
291#ifdef _POSIX_C_SOURCE
292#if _POSIX_C_SOURCE >= 200112
293#define __POSIX_VISIBLE 200112
294#define __ISO_C_VISIBLE 1999
295#elif _POSIX_C_SOURCE >= 199506
296#define __POSIX_VISIBLE 199506
297#define __ISO_C_VISIBLE 1990
298#elif _POSIX_C_SOURCE >= 199309
299#define __POSIX_VISIBLE 199309
300#define __ISO_C_VISIBLE 1990
301#elif _POSIX_C_SOURCE >= 199209
302#define __POSIX_VISIBLE 199209
303#define __ISO_C_VISIBLE 1990
304#elif _POSIX_C_SOURCE >= 199009
305#define __POSIX_VISIBLE 199009
306#define __ISO_C_VISIBLE 1990
307#else
308#define __POSIX_VISIBLE 198808
309#define __ISO_C_VISIBLE 0
310#endif /* _POSIX_C_SOURCE */
311#else
312/*-
313 * Deal with _ANSI_SOURCE:
314 * If it is defined, and no other compilation environment is explicitly
315 * requested, then define our internal feature-test macros to zero. This
316 * makes no difference to the preprocessor (undefined symbols in preprocessing
317 * expressions are defined to have value zero), but makes it more convenient for
318 * a test program to print out the values.
319 *
320 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
321 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
322 * environment (and in fact we will never get here).
323 */
324#ifdef _ANSI_SOURCE /* Hide almost everything. */
325#define __POSIX_VISIBLE 0
326#define __XSI_VISIBLE 0
327#define __BSD_VISIBLE 0
328#define __ISO_C_VISIBLE 1990
329#else /* Default environment: show everything. */
330#define __POSIX_VISIBLE 200112
331#define __XSI_VISIBLE 600
332#define __BSD_VISIBLE 1
333#define __ISO_C_VISIBLE 1999
334#endif
335#endif
336
337#endif /* !_SYS_CDEFS_H_ */