1 /* Copyright (C) 1991-1993,1995-2003,2004,2005 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 /* This macro indicates that the installed library is uClibc. Use
23 * __UCLIBC_MAJOR__ and __UCLIBC_MINOR__ to test for the features in
24 * specific releases. */
27 /* Load up the current set of uClibc supported features along
28 * with the current uClibc major and minor version numbers.
29 * For uClibc release 0.9.26, these numbers would be:
30 * #define __UCLIBC_MAJOR__ 0
31 * #define __UCLIBC_MINOR__ 9
32 * #define __UCLIBC_SUBLEVEL__ 26
34 #define __need_uClibc_config_h
35 #include <bits/uClibc_config.h>
36 #undef __need_uClibc_config_h
37 #include <bits/uClibc_arch_features.h>
39 /* For uClibc, always optimize for size -- this should disable
40 * a lot of expensive inlining... */
41 #define __OPTIMIZE_SIZE__ 1
43 /* These are defined by the user (or the compiler)
44 to specify the desired environment:
46 __STRICT_ANSI__ ISO Standard C.
47 _ISOC99_SOURCE Extensions to ISO C89 from ISO C99.
48 _POSIX_SOURCE IEEE Std 1003.1.
49 _POSIX_C_SOURCE If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
50 if >=199309L, add IEEE Std 1003.1b-1993;
51 if >=199506L, add IEEE Std 1003.1c-1995;
52 if >=200112L, all of IEEE 1003.1-2004
53 _XOPEN_SOURCE Includes POSIX and XPG things. Set to 500 if
54 Single Unix conformance is wanted, to 600 for the
55 upcoming sixth revision.
56 _XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions.
57 _LARGEFILE_SOURCE Some more functions for correct standard I/O.
58 _LARGEFILE64_SOURCE Additional functionality from LFS for large files.
59 _FILE_OFFSET_BITS=N Select default filesystem interface.
60 _BSD_SOURCE ISO C, POSIX, and 4.3BSD things.
61 _SVID_SOURCE ISO C, POSIX, and SVID things.
62 _ATFILE_SOURCE Additional *at interfaces.
63 _GNU_SOURCE All of the above, plus GNU extensions.
64 _REENTRANT Select additionally reentrant object.
65 _THREAD_SAFE Same as _REENTRANT, often used by other systems.
66 _FORTIFY_SOURCE If set to numeric value > 0 additional security
67 measures are defined, according to level.
69 The `-ansi' switch to the GNU C compiler defines __STRICT_ANSI__.
70 If none of these are defined, the default is to have _SVID_SOURCE,
71 _BSD_SOURCE, and _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to
72 199506L. If more than one of these are defined, they accumulate.
73 For example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE
74 together give you ISO C, 1003.1, and 1003.2, but nothing else.
76 These are defined by this file and are used by the
77 header files to decide what to declare or define:
79 __USE_ISOC99 Define ISO C99 things.
80 __USE_POSIX Define IEEE Std 1003.1 things.
81 __USE_POSIX2 Define IEEE Std 1003.2 things.
82 __USE_POSIX199309 Define IEEE Std 1003.1, and .1b things.
83 __USE_POSIX199506 Define IEEE Std 1003.1, .1b, .1c and .1i things.
84 __USE_XOPEN Define XPG things.
85 __USE_XOPEN_EXTENDED Define X/Open Unix things.
86 __USE_UNIX98 Define Single Unix V2 things.
87 __USE_XOPEN2K Define XPG6 things.
88 __USE_LARGEFILE Define correct standard I/O things.
89 __USE_LARGEFILE64 Define LFS things with separate names.
90 __USE_FILE_OFFSET64 Define 64bit interface as default.
91 __USE_BSD Define 4.3BSD things.
92 __USE_SVID Define SVID things.
93 __USE_MISC Define things common to BSD and System V Unix.
94 __USE_ATFILE Define *at interfaces and AT_* constants for them.
95 __USE_GNU Define GNU extensions.
96 __USE_REENTRANT Define reentrant/thread-safe *_r functions.
97 __USE_FORTIFY_LEVEL Additional security measures used, according to level.
98 __FAVOR_BSD Favor 4.3BSD things in cases of conflict.
100 The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
101 defined by this file unconditionally. `__GNU_LIBRARY__' is provided
102 only for compatibility. All new code should use the other symbols
103 to test for features.
105 All macros listed above as possibly being defined by this file are
106 explicitly undefined if they are not explicitly defined.
107 Feature-test macros that are not defined by the user or compiler
108 but are implied by the other feature-test macros defined (or by the
109 lack of any definitions) are defined by the file. */
112 /* Undefine everything, so we get a clean slate. */
116 #undef __USE_POSIX199309
117 #undef __USE_POSIX199506
119 #undef __USE_XOPEN_EXTENDED
122 #undef __USE_LARGEFILE
123 #undef __USE_LARGEFILE64
124 #undef __USE_FILE_OFFSET64
130 #undef __USE_REENTRANT
131 #undef __USE_FORTIFY_LEVEL
133 #undef __KERNEL_STRICT_NAMES
135 /* Suppress kernel-name space pollution unless user expressedly asks
137 #ifndef _LOOSE_KERNEL_NAMES
138 # define __KERNEL_STRICT_NAMES
141 /* Always use ISO C things. */
144 /* Convenience macros to test the versions of glibc and gcc.
146 #if __GNUC_PREREQ (2,8)
147 ... code requiring gcc 2.8 or later ...
149 Note - they won't work for gcc1 or glibc1, since the _MINOR macros
150 were not defined then. */
151 #if defined __GNUC__ && defined __GNUC_MINOR__
152 # define __GNUC_PREREQ(maj, min) \
153 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
155 # define __GNUC_PREREQ(maj, min) 0
159 /* If _BSD_SOURCE was defined by the user, favor BSD over POSIX. */
160 #if defined _BSD_SOURCE && \
161 !(defined _POSIX_SOURCE || defined _POSIX_C_SOURCE || \
162 defined _XOPEN_SOURCE || defined _XOPEN_SOURCE_EXTENDED || \
163 defined _GNU_SOURCE || defined _SVID_SOURCE)
164 # define __FAVOR_BSD 1
167 /* If _GNU_SOURCE was defined by the user, turn on all the other features. */
169 # undef _ISOC99_SOURCE
170 # define _ISOC99_SOURCE 1
171 # undef _POSIX_SOURCE
172 # define _POSIX_SOURCE 1
173 # undef _POSIX_C_SOURCE
174 # define _POSIX_C_SOURCE 199506L
175 # undef _XOPEN_SOURCE
176 # define _XOPEN_SOURCE 600
177 # undef _XOPEN_SOURCE_EXTENDED
178 # define _XOPEN_SOURCE_EXTENDED 1
179 # undef _LARGEFILE64_SOURCE
180 # define _LARGEFILE64_SOURCE 1
182 # define _BSD_SOURCE 1
184 # define _SVID_SOURCE 1
185 # undef _ATFILE_SOURCE
186 # define _ATFILE_SOURCE 1
189 /* If nothing (other than _GNU_SOURCE) is defined,
190 define _BSD_SOURCE and _SVID_SOURCE. */
191 #if (!defined __STRICT_ANSI__ && !defined _ISOC99_SOURCE && \
192 !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE && \
193 !defined _XOPEN_SOURCE && !defined _XOPEN_SOURCE_EXTENDED && \
194 !defined _BSD_SOURCE && !defined _SVID_SOURCE)
195 # define _BSD_SOURCE 1
196 # define _SVID_SOURCE 1
199 /* This is to enable the ISO C99 extension. Also recognize the old macro
200 which was used prior to the standard acceptance. This macro will
201 eventually go away and the features enabled by default once the ISO C99
202 standard is widely adopted. */
203 #if (defined _ISOC99_SOURCE || defined _ISOC9X_SOURCE \
204 || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))
205 # define __USE_ISOC99 1
208 /* If none of the ANSI/POSIX macros are defined, use POSIX.1 and POSIX.2
209 (and IEEE Std 1003.1b-1993 unless _XOPEN_SOURCE is defined). */
210 #if ((!defined __STRICT_ANSI__ || (_XOPEN_SOURCE - 0) >= 500) && \
211 !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE)
212 # define _POSIX_SOURCE 1
213 # if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 500
214 # define _POSIX_C_SOURCE 2
216 # define _POSIX_C_SOURCE 199506L
220 #if defined _POSIX_SOURCE || _POSIX_C_SOURCE >= 1 || defined _XOPEN_SOURCE
221 # define __USE_POSIX 1
224 #if defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 2 || defined _XOPEN_SOURCE
225 # define __USE_POSIX2 1
228 #if (_POSIX_C_SOURCE - 0) >= 199309L
229 # define __USE_POSIX199309 1
232 #if (_POSIX_C_SOURCE - 0) >= 199506L
233 # define __USE_POSIX199506 1
236 #if (_POSIX_C_SOURCE - 0) >= 200112L
237 # define __USE_XOPEN2K 1
241 # define __USE_XOPEN 1
242 # if (_XOPEN_SOURCE - 0) >= 500
243 # define __USE_XOPEN_EXTENDED 1
244 # define __USE_UNIX98 1
245 # undef _LARGEFILE_SOURCE
246 # define _LARGEFILE_SOURCE 1
247 # if (_XOPEN_SOURCE - 0) >= 600
248 # define __USE_XOPEN2K 1
250 # define __USE_ISOC99 1
253 # ifdef _XOPEN_SOURCE_EXTENDED
254 # define __USE_XOPEN_EXTENDED 1
259 #ifdef _LARGEFILE_SOURCE
260 # define __USE_LARGEFILE 1
263 #ifdef _LARGEFILE64_SOURCE
264 # define __USE_LARGEFILE64 1
267 #if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS == 64
268 # define __USE_FILE_OFFSET64 1
271 #if defined _BSD_SOURCE || defined _SVID_SOURCE
272 # define __USE_MISC 1
280 # define __USE_SVID 1
283 #ifdef _ATFILE_SOURCE
284 # define __USE_ATFILE 1
291 #if defined _REENTRANT || defined _THREAD_SAFE
292 # define __USE_REENTRANT 1
295 /* uClibc does not support _FORTIFY_SOURCE */
296 #undef _FORTIFY_SOURCE
297 #if defined _FORTIFY_SOURCE && _FORTIFY_SOURCE > 0 \
298 && __GNUC_PREREQ (4, 1) && defined __OPTIMIZE__ && __OPTIMIZE__ > 0
299 # if _FORTIFY_SOURCE > 1
300 # define __USE_FORTIFY_LEVEL 2
302 # define __USE_FORTIFY_LEVEL 1
305 # define __USE_FORTIFY_LEVEL 0
308 /* We do support the IEC 559 math functionality, real and complex. */
309 #define __STDC_IEC_559__ 1
310 #define __STDC_IEC_559_COMPLEX__ 1
312 #ifdef __UCLIBC_HAS_WCHAR__
313 /* wchar_t uses ISO 10646-1 (2nd ed., published 2000-09-15) / Unicode 3.1. */
314 # define __STDC_ISO_10646__ 200009L
317 /* There is an unwholesomely huge amount of code out there that depends on the
318 * presence of GNU libc header files. We have GNU libc header files. So here
319 * we commit a horrible sin. At this point, we _lie_ and claim to be GNU libc
320 * to make things like /usr/include/linux/socket.h and lots of apps work as
321 * their developers intended. This is IMHO, pardonable, since these defines
322 * are not really intended to check for the presence of a particular library,
323 * but rather are used to define an _interface_. */
324 #if !defined __FORCE_NOGLIBC && (!defined _LIBC || defined __FORCE_GLIBC)
325 /* This macro indicates that the installed library is the GNU C Library.
326 For historic reasons the value now is 6 and this will stay from now
327 on. The use of this variable is deprecated. */
328 # undef __GNU_LIBRARY__
329 # define __GNU_LIBRARY__ 6
331 /* Major and minor version number of the GNU C library package. Use
332 these macros to test for features in specific releases. */
333 /* Don't do it, if you want to keep uClibc happy. */
335 # define __GLIBC_MINOR__ 2
338 #define __GLIBC_PREREQ(maj, min) \
339 ((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min))
342 /* Decide whether a compiler supports the long long datatypes. */
343 #if defined __GNUC__ \
344 || (defined __PGI && defined __i386__ ) \
345 || (defined __INTEL_COMPILER && (defined __i386__ || defined __ia64__)) \
346 || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
347 # define __GLIBC_HAVE_LONG_LONG 1
351 /* This is here only because every header file already includes this one. */
352 #ifndef __ASSEMBLER__
353 # ifndef _SYS_CDEFS_H
354 # include <sys/cdefs.h>
357 /* If we don't have __REDIRECT, prototypes will be missing if
358 __USE_FILE_OFFSET64 but not __USE_LARGEFILE[64]. */
359 # if defined __USE_FILE_OFFSET64 && !defined __REDIRECT
360 # define __USE_LARGEFILE 1
361 # define __USE_LARGEFILE64 1
364 #endif /* !ASSEMBLER */
366 /* Decide whether we can define 'extern inline' functions in headers. */
367 #if __GNUC_PREREQ (2, 7) && defined __OPTIMIZE__ \
368 && !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__
369 # define __USE_EXTERN_INLINES 1
373 /* Make sure users large file options agree with uClibc's configuration. */
374 #ifndef __UCLIBC_HAS_LFS__
376 /* If uClibc was built without large file support, output an error if
377 * 64-bit file offsets were requested.
378 * NOTE: This is probably incorrect on a 64-bit arch... */
379 # ifdef __USE_FILE_OFFSET64
380 # error It appears you have defined _FILE_OFFSET_BITS=64. Unfortunately, \
381 uClibc was built without large file support enabled.
384 /* If uClibc was built without large file support and _LARGEFILE64_SOURCE
385 * is defined, undefine it. */
386 # ifdef _LARGEFILE64_SOURCE
387 # undef _LARGEFILE64_SOURCE
388 # undef __USE_LARGEFILE64
391 /* If we're actually building uClibc with large file support,
392 * define __USE_LARGEFILE64 and __USE_LARGEFILE. */
394 # undef _LARGEFILE_SOURCE
395 # undef _LARGEFILE64_SOURCE
396 # undef _FILE_OFFSET_BITS
397 # undef __USE_LARGEFILE
398 # undef __USE_LARGEFILE64
399 # undef __USE_FILE_OFFSET64
400 # define _LARGEFILE_SOURCE 1
401 # define _LARGEFILE64_SOURCE 1
402 # define __USE_LARGEFILE 1
403 # define __USE_LARGEFILE64 1
406 /* uClibc does not support *at interfaces. */
407 #undef _ATFILE_SOURCE
411 # include <libc-internal.h>
418 /* Disable __user, which shows up in 2.6.x include asm headers
419 * that get pulled in by signal.h */
422 #endif /* features.h */