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dff8da6b | 1 | /* Copyright (C) 1991-2024 Free Software Foundation, Inc. |
2c6fe0bd | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
2c6fe0bd | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 8 | |
2c6fe0bd UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
28f540f4 RM |
17 | |
18 | #ifndef _FEATURES_H | |
28f540f4 RM |
19 | #define _FEATURES_H 1 |
20 | ||
21 | /* These are defined by the user (or the compiler) | |
22 | to specify the desired environment: | |
23 | ||
d38cd08c | 24 | __STRICT_ANSI__ ISO Standard C. |
ec751a23 | 25 | _ISOC99_SOURCE Extensions to ISO C89 from ISO C99. |
d7809905 | 26 | _ISOC11_SOURCE Extensions to ISO C99 from ISO C11. |
42cc619d JM |
27 | _ISOC23_SOURCE Extensions to ISO C99 from ISO C23. |
28 | _ISOC2X_SOURCE Old name for _ISOC23_SOURCE. | |
c0307377 ZW |
29 | __STDC_WANT_LIB_EXT2__ |
30 | Extensions to ISO C99 from TR 27431-2:2010. | |
31 | __STDC_WANT_IEC_60559_BFP_EXT__ | |
32 | Extensions to ISO C11 from TS 18661-1:2014. | |
33 | __STDC_WANT_IEC_60559_FUNCS_EXT__ | |
34 | Extensions to ISO C11 from TS 18661-4:2015. | |
4fc12f0e PM |
35 | __STDC_WANT_IEC_60559_TYPES_EXT__ |
36 | Extensions to ISO C11 from TS 18661-3:2015. | |
858045ad | 37 | __STDC_WANT_IEC_60559_EXT__ |
42cc619d | 38 | ISO C23 interfaces defined only in Annex F. |
c0307377 | 39 | |
28f540f4 | 40 | _POSIX_SOURCE IEEE Std 1003.1. |
6d52618b | 41 | _POSIX_C_SOURCE If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2; |
118bad87 | 42 | if >=199309L, add IEEE Std 1003.1b-1993; |
7a80496f UD |
43 | if >=199506L, add IEEE Std 1003.1c-1995; |
44 | if >=200112L, all of IEEE 1003.1-2004 | |
3e6b0a28 | 45 | if >=200809L, all of IEEE 1003.1-2008 |
a5a0310d | 46 | _XOPEN_SOURCE Includes POSIX and XPG things. Set to 500 if |
925e31d9 | 47 | Single Unix conformance is wanted, to 600 for the |
3e6b0a28 | 48 | sixth revision, to 700 for the seventh revision. |
2c6fe0bd | 49 | _XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions. |
dfd2257a UD |
50 | _LARGEFILE_SOURCE Some more functions for correct standard I/O. |
51 | _LARGEFILE64_SOURCE Additional functionality from LFS for large files. | |
52 | _FILE_OFFSET_BITS=N Select default filesystem interface. | |
0b8f25bb | 53 | _ATFILE_SOURCE Additional *at interfaces. |
5d98a7da L |
54 | _DYNAMIC_STACK_SIZE_SOURCE Select correct (but non compile-time constant) |
55 | MINSIGSTKSZ, SIGSTKSZ and PTHREAD_STACK_MIN. | |
28f540f4 | 56 | _GNU_SOURCE All of the above, plus GNU extensions. |
c688b419 JM |
57 | _DEFAULT_SOURCE The default set of features (taking precedence over |
58 | __STRICT_ANSI__). | |
c0307377 ZW |
59 | |
60 | _FORTIFY_SOURCE Add security hardening to many library functions. | |
1423a26a | 61 | Set to 1, 2 or 3; 3 performs stricter checks than 2, which |
62 | performs stricter checks than 1. | |
c0307377 ZW |
63 | |
64 | _REENTRANT, _THREAD_SAFE | |
65 | Obsolete; equivalent to _POSIX_C_SOURCE=199506L. | |
28f540f4 | 66 | |
c688b419 JM |
67 | The `-ansi' switch to the GNU C compiler, and standards conformance |
68 | options such as `-std=c99', define __STRICT_ANSI__. If none of | |
69 | these are defined, or if _DEFAULT_SOURCE is defined, the default is | |
c941736c JM |
70 | to have _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to |
71 | 200809L, as well as enabling miscellaneous functions from BSD and | |
72 | SVID. If more than one of these are defined, they accumulate. For | |
73 | example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE together | |
74 | give you ISO C, 1003.1, and 1003.2, but nothing else. | |
28f540f4 RM |
75 | |
76 | These are defined by this file and are used by the | |
77 | header files to decide what to declare or define: | |
78 | ||
48789000 JM |
79 | __GLIBC_USE (F) Define things from feature set F. This is defined |
80 | to 1 or 0; the subsequent macros are either defined | |
81 | or undefined, and those tests should be moved to | |
82 | __GLIBC_USE. | |
d7809905 | 83 | __USE_ISOC11 Define ISO C11 things. |
ec751a23 | 84 | __USE_ISOC99 Define ISO C99 things. |
087722b8 | 85 | __USE_ISOC95 Define ISO C90 AMD1 (C95) things. |
d6c064e9 | 86 | __USE_ISOCXX11 Define ISO C++11 things. |
28f540f4 RM |
87 | __USE_POSIX Define IEEE Std 1003.1 things. |
88 | __USE_POSIX2 Define IEEE Std 1003.2 things. | |
4a582094 UD |
89 | __USE_POSIX199309 Define IEEE Std 1003.1, and .1b things. |
90 | __USE_POSIX199506 Define IEEE Std 1003.1, .1b, .1c and .1i things. | |
2c6fe0bd UD |
91 | __USE_XOPEN Define XPG things. |
92 | __USE_XOPEN_EXTENDED Define X/Open Unix things. | |
a5a0310d | 93 | __USE_UNIX98 Define Single Unix V2 things. |
925e31d9 | 94 | __USE_XOPEN2K Define XPG6 things. |
f095bb72 | 95 | __USE_XOPEN2KXSI Define XPG6 XSI things. |
81489b2e | 96 | __USE_XOPEN2K8 Define XPG7 things. |
f095bb72 | 97 | __USE_XOPEN2K8XSI Define XPG7 XSI things. |
925e31d9 | 98 | __USE_LARGEFILE Define correct standard I/O things. |
dfd2257a UD |
99 | __USE_LARGEFILE64 Define LFS things with separate names. |
100 | __USE_FILE_OFFSET64 Define 64bit interface as default. | |
498afc54 | 101 | __USE_MISC Define things from 4.3BSD or System V Unix. |
0b8f25bb | 102 | __USE_ATFILE Define *at interfaces and AT_* constants for them. |
5d98a7da L |
103 | __USE_DYNAMIC_STACK_SIZE Define correct (but non compile-time constant) |
104 | MINSIGSTKSZ, SIGSTKSZ and PTHREAD_STACK_MIN. | |
28f540f4 | 105 | __USE_GNU Define GNU extensions. |
b5cc329c | 106 | __USE_FORTIFY_LEVEL Additional security measures used, according to level. |
28f540f4 | 107 | |
d38cd08c UD |
108 | The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are |
109 | defined by this file unconditionally. `__GNU_LIBRARY__' is provided | |
110 | only for compatibility. All new code should use the other symbols | |
111 | to test for features. | |
28f540f4 | 112 | |
28f540f4 RM |
113 | All macros listed above as possibly being defined by this file are |
114 | explicitly undefined if they are not explicitly defined. | |
115 | Feature-test macros that are not defined by the user or compiler | |
116 | but are implied by the other feature-test macros defined (or by the | |
48789000 JM |
117 | lack of any definitions) are defined by the file. |
118 | ||
119 | ISO C feature test macros depend on the definition of the macro | |
120 | when an affected header is included, not when the first system | |
121 | header is included, and so they are handled in | |
122 | <bits/libc-header-start.h>, which does not have a multiple include | |
123 | guard. Feature test macros that can be handled from the first | |
124 | system header included are handled here. */ | |
28f540f4 RM |
125 | |
126 | ||
127 | /* Undefine everything, so we get a clean slate. */ | |
d7809905 | 128 | #undef __USE_ISOC11 |
ec751a23 | 129 | #undef __USE_ISOC99 |
087722b8 | 130 | #undef __USE_ISOC95 |
8fd8ff3b | 131 | #undef __USE_ISOCXX11 |
28f540f4 RM |
132 | #undef __USE_POSIX |
133 | #undef __USE_POSIX2 | |
6d52618b | 134 | #undef __USE_POSIX199309 |
4a582094 | 135 | #undef __USE_POSIX199506 |
2c6fe0bd UD |
136 | #undef __USE_XOPEN |
137 | #undef __USE_XOPEN_EXTENDED | |
dfd2257a | 138 | #undef __USE_UNIX98 |
24d6fe58 | 139 | #undef __USE_XOPEN2K |
f095bb72 | 140 | #undef __USE_XOPEN2KXSI |
3e6b0a28 | 141 | #undef __USE_XOPEN2K8 |
f095bb72 | 142 | #undef __USE_XOPEN2K8XSI |
dfd2257a UD |
143 | #undef __USE_LARGEFILE |
144 | #undef __USE_LARGEFILE64 | |
145 | #undef __USE_FILE_OFFSET64 | |
28f540f4 | 146 | #undef __USE_MISC |
0b8f25bb | 147 | #undef __USE_ATFILE |
5d98a7da | 148 | #undef __USE_DYNAMIC_STACK_SIZE |
28f540f4 | 149 | #undef __USE_GNU |
b5cc329c | 150 | #undef __USE_FORTIFY_LEVEL |
a1470b6f | 151 | #undef __KERNEL_STRICT_NAMES |
42cc619d | 152 | #undef __GLIBC_USE_ISOC23 |
7caa5054 | 153 | #undef __GLIBC_USE_DEPRECATED_GETS |
03992356 | 154 | #undef __GLIBC_USE_DEPRECATED_SCANF |
42cc619d | 155 | #undef __GLIBC_USE_C23_STRTOL |
28f540f4 | 156 | |
a1470b6f | 157 | /* Suppress kernel-name space pollution unless user expressedly asks |
2c6fe0bd | 158 | for it. */ |
a1470b6f RM |
159 | #ifndef _LOOSE_KERNEL_NAMES |
160 | # define __KERNEL_STRICT_NAMES | |
161 | #endif | |
28f540f4 | 162 | |
cab4d74b ZW |
163 | /* Convenience macro to test the version of gcc. |
164 | Use like this: | |
b5cc329c UD |
165 | #if __GNUC_PREREQ (2,8) |
166 | ... code requiring gcc 2.8 or later ... | |
167 | #endif | |
cab4d74b ZW |
168 | Note: only works for GCC 2.0 and later, because __GNUC_MINOR__ was |
169 | added in 2.0. */ | |
b5cc329c UD |
170 | #if defined __GNUC__ && defined __GNUC_MINOR__ |
171 | # define __GNUC_PREREQ(maj, min) \ | |
172 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) | |
173 | #else | |
174 | # define __GNUC_PREREQ(maj, min) 0 | |
175 | #endif | |
176 | ||
cab4d74b ZW |
177 | /* Similarly for clang. Features added to GCC after version 4.2 may |
178 | or may not also be available in clang, and clang's definitions of | |
179 | __GNUC(_MINOR)__ are fixed at 4 and 2 respectively. Not all such | |
180 | features can be queried via __has_extension/__has_feature. */ | |
181 | #if defined __clang_major__ && defined __clang_minor__ | |
182 | # define __glibc_clang_prereq(maj, min) \ | |
183 | ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min)) | |
184 | #else | |
185 | # define __glibc_clang_prereq(maj, min) 0 | |
186 | #endif | |
187 | ||
48789000 JM |
188 | /* Whether to use feature set F. */ |
189 | #define __GLIBC_USE(F) __GLIBC_USE_ ## F | |
190 | ||
c941736c | 191 | /* _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for |
ade40b10 CD |
192 | _DEFAULT_SOURCE. If _DEFAULT_SOURCE is present we do not |
193 | issue a warning; the expectation is that the source is being | |
194 | transitioned to use the new macro. */ | |
195 | #if (defined _BSD_SOURCE || defined _SVID_SOURCE) \ | |
196 | && !defined _DEFAULT_SOURCE | |
c941736c JM |
197 | # warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE" |
198 | # undef _DEFAULT_SOURCE | |
199 | # define _DEFAULT_SOURCE 1 | |
200 | #endif | |
28f540f4 | 201 | |
42cc619d JM |
202 | /* Remap the old name _ISOC2X_SOURCE to _ISOC23_SOURCE. */ |
203 | #ifdef _ISOC2X_SOURCE | |
204 | # undef _ISOC2X_SOURCE | |
205 | # undef _ISOC23_SOURCE | |
206 | # define _ISOC23_SOURCE 1 | |
207 | #endif | |
208 | ||
59dd8641 RM |
209 | /* If _GNU_SOURCE was defined by the user, turn on all the other features. */ |
210 | #ifdef _GNU_SOURCE | |
e531ede5 UD |
211 | # undef _ISOC95_SOURCE |
212 | # define _ISOC95_SOURCE 1 | |
ec751a23 UD |
213 | # undef _ISOC99_SOURCE |
214 | # define _ISOC99_SOURCE 1 | |
d7809905 UD |
215 | # undef _ISOC11_SOURCE |
216 | # define _ISOC11_SOURCE 1 | |
42cc619d JM |
217 | # undef _ISOC23_SOURCE |
218 | # define _ISOC23_SOURCE 1 | |
5107cf1d UD |
219 | # undef _POSIX_SOURCE |
220 | # define _POSIX_SOURCE 1 | |
221 | # undef _POSIX_C_SOURCE | |
3e6b0a28 | 222 | # define _POSIX_C_SOURCE 200809L |
5107cf1d | 223 | # undef _XOPEN_SOURCE |
3e6b0a28 | 224 | # define _XOPEN_SOURCE 700 |
5107cf1d UD |
225 | # undef _XOPEN_SOURCE_EXTENDED |
226 | # define _XOPEN_SOURCE_EXTENDED 1 | |
dfd2257a UD |
227 | # undef _LARGEFILE64_SOURCE |
228 | # define _LARGEFILE64_SOURCE 1 | |
c688b419 JM |
229 | # undef _DEFAULT_SOURCE |
230 | # define _DEFAULT_SOURCE 1 | |
0b8f25bb RM |
231 | # undef _ATFILE_SOURCE |
232 | # define _ATFILE_SOURCE 1 | |
5d98a7da L |
233 | # undef _DYNAMIC_STACK_SIZE_SOURCE |
234 | # define _DYNAMIC_STACK_SIZE_SOURCE 1 | |
59dd8641 | 235 | #endif |
28f540f4 | 236 | |
c688b419 | 237 | /* If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined, |
498afc54 | 238 | define _DEFAULT_SOURCE. */ |
c688b419 JM |
239 | #if (defined _DEFAULT_SOURCE \ |
240 | || (!defined __STRICT_ANSI__ \ | |
862b4502 | 241 | && !defined _ISOC99_SOURCE && !defined _ISOC11_SOURCE \ |
42cc619d | 242 | && !defined _ISOC23_SOURCE \ |
c688b419 | 243 | && !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE \ |
498afc54 | 244 | && !defined _XOPEN_SOURCE)) |
c688b419 JM |
245 | # undef _DEFAULT_SOURCE |
246 | # define _DEFAULT_SOURCE 1 | |
28f540f4 RM |
247 | #endif |
248 | ||
42cc619d JM |
249 | /* This is to enable the ISO C23 extension. */ |
250 | #if (defined _ISOC23_SOURCE \ | |
777d75fb | 251 | || (defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L)) |
42cc619d | 252 | # define __GLIBC_USE_ISOC23 1 |
777d75fb | 253 | #else |
42cc619d | 254 | # define __GLIBC_USE_ISOC23 0 |
777d75fb JM |
255 | #endif |
256 | ||
d7809905 | 257 | /* This is to enable the ISO C11 extension. */ |
42cc619d | 258 | #if (defined _ISOC11_SOURCE || defined _ISOC23_SOURCE \ |
d7809905 | 259 | || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L)) |
c0e87cc0 UD |
260 | # define __USE_ISOC11 1 |
261 | #endif | |
d7809905 UD |
262 | |
263 | /* This is to enable the ISO C99 extension. */ | |
777d75fb | 264 | #if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \ |
42cc619d | 265 | || defined _ISOC23_SOURCE \ |
47a81620 | 266 | || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)) |
ec751a23 | 267 | # define __USE_ISOC99 1 |
2f6d1f1b UD |
268 | #endif |
269 | ||
087722b8 | 270 | /* This is to enable the ISO C90 Amendment 1:1995 extension. */ |
777d75fb | 271 | #if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \ |
42cc619d | 272 | || defined _ISOC23_SOURCE \ |
087722b8 UD |
273 | || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199409L)) |
274 | # define __USE_ISOC95 1 | |
275 | #endif | |
276 | ||
d6c064e9 JW |
277 | #ifdef __cplusplus |
278 | /* This is to enable compatibility for ISO C++17. */ | |
279 | # if __cplusplus >= 201703L | |
280 | # define __USE_ISOC11 1 | |
281 | # endif | |
8fd8ff3b | 282 | /* This is to enable compatibility for ISO C++11. |
d6c064e9 JW |
283 | Check the temporary macro for now, too. */ |
284 | # if __cplusplus >= 201103L || defined __GXX_EXPERIMENTAL_CXX0X__ | |
285 | # define __USE_ISOCXX11 1 | |
286 | # define __USE_ISOC99 1 | |
287 | # endif | |
8fd8ff3b UD |
288 | #endif |
289 | ||
c688b419 JM |
290 | /* If none of the ANSI/POSIX macros are defined, or if _DEFAULT_SOURCE |
291 | is defined, use POSIX.1-2008 (or another version depending on | |
292 | _XOPEN_SOURCE). */ | |
293 | #ifdef _DEFAULT_SOURCE | |
294 | # if !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE | |
295 | # define __USE_POSIX_IMPLICITLY 1 | |
296 | # endif | |
297 | # undef _POSIX_SOURCE | |
298 | # define _POSIX_SOURCE 1 | |
299 | # undef _POSIX_C_SOURCE | |
300 | # define _POSIX_C_SOURCE 200809L | |
301 | #endif | |
c0307377 | 302 | |
f248238c JM |
303 | #if ((!defined __STRICT_ANSI__ \ |
304 | || (defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) >= 500)) \ | |
305 | && !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE) | |
5107cf1d | 306 | # define _POSIX_SOURCE 1 |
925e31d9 | 307 | # if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 500 |
5107cf1d | 308 | # define _POSIX_C_SOURCE 2 |
1676aaef | 309 | # elif defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 600 |
a334319f | 310 | # define _POSIX_C_SOURCE 199506L |
3e6b0a28 | 311 | # elif defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 700 |
1676aaef | 312 | # define _POSIX_C_SOURCE 200112L |
3e6b0a28 UD |
313 | # else |
314 | # define _POSIX_C_SOURCE 200809L | |
5107cf1d | 315 | # endif |
2e6d6bac | 316 | # define __USE_POSIX_IMPLICITLY 1 |
28f540f4 RM |
317 | #endif |
318 | ||
c0307377 ZW |
319 | /* Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be |
320 | defined in all multithreaded code. GNU libc has not required this | |
321 | for many years. We now treat them as compatibility synonyms for | |
322 | _POSIX_C_SOURCE=199506L, which is the earliest level of POSIX with | |
323 | comprehensive support for multithreaded code. Using them never | |
324 | lowers the selected level of POSIX conformance, only raises it. */ | |
325 | #if ((!defined _POSIX_C_SOURCE || (_POSIX_C_SOURCE - 0) < 199506L) \ | |
326 | && (defined _REENTRANT || defined _THREAD_SAFE)) | |
327 | # define _POSIX_SOURCE 1 | |
328 | # undef _POSIX_C_SOURCE | |
329 | # define _POSIX_C_SOURCE 199506L | |
330 | #endif | |
331 | ||
f248238c JM |
332 | #if (defined _POSIX_SOURCE \ |
333 | || (defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 1) \ | |
334 | || defined _XOPEN_SOURCE) | |
5107cf1d | 335 | # define __USE_POSIX 1 |
28f540f4 RM |
336 | #endif |
337 | ||
d38cd08c | 338 | #if defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 2 || defined _XOPEN_SOURCE |
5107cf1d | 339 | # define __USE_POSIX2 1 |
28f540f4 RM |
340 | #endif |
341 | ||
f248238c | 342 | #if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 199309L |
9756dfe1 | 343 | # define __USE_POSIX199309 1 |
6d52618b UD |
344 | #endif |
345 | ||
f248238c | 346 | #if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 199506L |
4a582094 UD |
347 | # define __USE_POSIX199506 1 |
348 | #endif | |
349 | ||
f248238c | 350 | #if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 200112L |
23ae6451 | 351 | # define __USE_XOPEN2K 1 |
e531ede5 UD |
352 | # undef __USE_ISOC95 |
353 | # define __USE_ISOC95 1 | |
c163ee23 UD |
354 | # undef __USE_ISOC99 |
355 | # define __USE_ISOC99 1 | |
23ae6451 UD |
356 | #endif |
357 | ||
f248238c | 358 | #if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 200809L |
3e6b0a28 UD |
359 | # define __USE_XOPEN2K8 1 |
360 | # undef _ATFILE_SOURCE | |
361 | # define _ATFILE_SOURCE 1 | |
362 | #endif | |
363 | ||
2c6fe0bd | 364 | #ifdef _XOPEN_SOURCE |
5107cf1d | 365 | # define __USE_XOPEN 1 |
219aa9e9 | 366 | # if (_XOPEN_SOURCE - 0) >= 500 |
5107cf1d | 367 | # define __USE_XOPEN_EXTENDED 1 |
a5a0310d | 368 | # define __USE_UNIX98 1 |
dfd2257a UD |
369 | # undef _LARGEFILE_SOURCE |
370 | # define _LARGEFILE_SOURCE 1 | |
925e31d9 | 371 | # if (_XOPEN_SOURCE - 0) >= 600 |
3e6b0a28 UD |
372 | # if (_XOPEN_SOURCE - 0) >= 700 |
373 | # define __USE_XOPEN2K8 1 | |
f095bb72 | 374 | # define __USE_XOPEN2K8XSI 1 |
3e6b0a28 | 375 | # endif |
219aa9e9 | 376 | # define __USE_XOPEN2K 1 |
f095bb72 | 377 | # define __USE_XOPEN2KXSI 1 |
e531ede5 UD |
378 | # undef __USE_ISOC95 |
379 | # define __USE_ISOC95 1 | |
91bc38d0 UD |
380 | # undef __USE_ISOC99 |
381 | # define __USE_ISOC99 1 | |
219aa9e9 | 382 | # endif |
a5a0310d UD |
383 | # else |
384 | # ifdef _XOPEN_SOURCE_EXTENDED | |
385 | # define __USE_XOPEN_EXTENDED 1 | |
386 | # endif | |
5107cf1d | 387 | # endif |
2c6fe0bd UD |
388 | #endif |
389 | ||
dfd2257a UD |
390 | #ifdef _LARGEFILE_SOURCE |
391 | # define __USE_LARGEFILE 1 | |
392 | #endif | |
393 | ||
394 | #ifdef _LARGEFILE64_SOURCE | |
395 | # define __USE_LARGEFILE64 1 | |
396 | #endif | |
397 | ||
398 | #if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS == 64 | |
399 | # define __USE_FILE_OFFSET64 1 | |
400 | #endif | |
401 | ||
47f24c21 AZ |
402 | #include <features-time64.h> |
403 | ||
498afc54 | 404 | #if defined _DEFAULT_SOURCE |
5107cf1d | 405 | # define __USE_MISC 1 |
28f540f4 RM |
406 | #endif |
407 | ||
0b8f25bb RM |
408 | #ifdef _ATFILE_SOURCE |
409 | # define __USE_ATFILE 1 | |
410 | #endif | |
411 | ||
5d98a7da L |
412 | #ifdef _DYNAMIC_STACK_SIZE_SOURCE |
413 | # define __USE_DYNAMIC_STACK_SIZE 1 | |
6c57d320 L |
414 | #endif |
415 | ||
28f540f4 | 416 | #ifdef _GNU_SOURCE |
5107cf1d | 417 | # define __USE_GNU 1 |
28f540f4 RM |
418 | #endif |
419 | ||
05c2c961 RMG |
420 | #if defined _FORTIFY_SOURCE && _FORTIFY_SOURCE > 0 |
421 | # if !defined __OPTIMIZE__ || __OPTIMIZE__ <= 0 | |
422 | # warning _FORTIFY_SOURCE requires compiling with optimization (-O) | |
423 | # elif !__GNUC_PREREQ (4, 1) | |
424 | # warning _FORTIFY_SOURCE requires GCC 4.1 or later | |
86bf0feb SP |
425 | # elif _FORTIFY_SOURCE > 2 && (__glibc_clang_prereq (9, 0) \ |
426 | || __GNUC_PREREQ (12, 0)) | |
427 | ||
c43c5796 SP |
428 | # if _FORTIFY_SOURCE > 3 |
429 | # warning _FORTIFY_SOURCE > 3 is treated like 3 on this platform | |
430 | # endif | |
431 | # define __USE_FORTIFY_LEVEL 3 | |
05c2c961 | 432 | # elif _FORTIFY_SOURCE > 1 |
2a08b6e8 SP |
433 | # if _FORTIFY_SOURCE > 2 |
434 | # warning _FORTIFY_SOURCE > 2 is treated like 2 on this platform | |
435 | # endif | |
a334319f | 436 | # define __USE_FORTIFY_LEVEL 2 |
faa26ad4 RM |
437 | # else |
438 | # define __USE_FORTIFY_LEVEL 1 | |
b5cc329c | 439 | # endif |
05c2c961 RMG |
440 | #endif |
441 | #ifndef __USE_FORTIFY_LEVEL | |
faa26ad4 | 442 | # define __USE_FORTIFY_LEVEL 0 |
b5cc329c UD |
443 | #endif |
444 | ||
7caa5054 ZW |
445 | /* The function 'gets' existed in C89, but is impossible to use |
446 | safely. It has been removed from ISO C11 and ISO C++14. Note: for | |
447 | compatibility with various implementations of <cstdio>, this test | |
448 | must consider only the value of __cplusplus when compiling C++. */ | |
449 | #if defined __cplusplus ? __cplusplus >= 201402L : defined __USE_ISOC11 | |
450 | # define __GLIBC_USE_DEPRECATED_GETS 0 | |
451 | #else | |
452 | # define __GLIBC_USE_DEPRECATED_GETS 1 | |
453 | #endif | |
454 | ||
03992356 ZW |
455 | /* GNU formerly extended the scanf functions with modified format |
456 | specifiers %as, %aS, and %a[...] that allocate a buffer for the | |
457 | input using malloc. This extension conflicts with ISO C99, which | |
458 | defines %a as a standalone format specifier that reads a floating- | |
459 | point number; moreover, POSIX.1-2008 provides the same feature | |
460 | using the modifier letter 'm' instead (%ms, %mS, %m[...]). | |
461 | ||
462 | We now follow C99 unless GNU extensions are active and the compiler | |
463 | is specifically in C89 or C++98 mode (strict or not). For | |
464 | instance, with GCC, -std=gnu11 will have C99-compliant scanf with | |
465 | or without -D_GNU_SOURCE, but -std=c89 -D_GNU_SOURCE will have the | |
466 | old extension. */ | |
34a5a146 JM |
467 | #if (defined __USE_GNU \ |
468 | && (defined __cplusplus \ | |
469 | ? (__cplusplus < 201103L && !defined __GXX_EXPERIMENTAL_CXX0X__) \ | |
470 | : (!defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L))) | |
03992356 ZW |
471 | # define __GLIBC_USE_DEPRECATED_SCANF 1 |
472 | #else | |
473 | # define __GLIBC_USE_DEPRECATED_SCANF 0 | |
474 | #endif | |
475 | ||
42cc619d | 476 | /* ISO C23 added support for a 0b or 0B prefix on binary constants as |
64924422 JM |
477 | inputs to strtol-family functions (base 0 or 2). This macro is |
478 | used to condition redirection in headers to allow that redirection | |
479 | to be disabled when building those functions, despite _GNU_SOURCE | |
480 | being defined. */ | |
42cc619d JM |
481 | #if __GLIBC_USE (ISOC23) |
482 | # define __GLIBC_USE_C23_STRTOL 1 | |
64924422 | 483 | #else |
42cc619d | 484 | # define __GLIBC_USE_C23_STRTOL 0 |
64924422 JM |
485 | #endif |
486 | ||
ff3b3d82 JM |
487 | /* Get definitions of __STDC_* predefined macros, if the compiler has |
488 | not preincluded this header automatically. */ | |
489 | #include <stdc-predef.h> | |
91bc38d0 | 490 | |
ba1ffaa1 UD |
491 | /* This macro indicates that the installed library is the GNU C Library. |
492 | For historic reasons the value now is 6 and this will stay from now | |
493 | on. The use of this variable is deprecated. Use __GLIBC__ and | |
494 | __GLIBC_MINOR__ now (see below) when you want to test for a specific | |
495 | GNU C library version and use the values in <gnu/lib-names.h> to get | |
496 | the sonames of the shared libraries. */ | |
497 | #undef __GNU_LIBRARY__ | |
498 | #define __GNU_LIBRARY__ 6 | |
499 | ||
500 | /* Major and minor version number of the GNU C library package. Use | |
501 | these macros to test for features in specific releases. */ | |
502 | #define __GLIBC__ 2 | |
3e941ef8 | 503 | #define __GLIBC_MINOR__ 39 |
28f540f4 | 504 | |
f042f18f UD |
505 | #define __GLIBC_PREREQ(maj, min) \ |
506 | ((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min)) | |
4360eafd | 507 | |
28f540f4 | 508 | /* This is here only because every header file already includes this one. */ |
edf5b2d7 | 509 | #ifndef __ASSEMBLER__ |
95589177 UD |
510 | # ifndef _SYS_CDEFS_H |
511 | # include <sys/cdefs.h> | |
512 | # endif | |
01cad722 UD |
513 | |
514 | /* If we don't have __REDIRECT, prototypes will be missing if | |
515 | __USE_FILE_OFFSET64 but not __USE_LARGEFILE[64]. */ | |
516 | # if defined __USE_FILE_OFFSET64 && !defined __REDIRECT | |
4152ed15 UD |
517 | # define __USE_LARGEFILE 1 |
518 | # define __USE_LARGEFILE64 1 | |
01cad722 UD |
519 | # endif |
520 | ||
eedbbe58 UD |
521 | #endif /* !ASSEMBLER */ |
522 | ||
523 | /* Decide whether we can define 'extern inline' functions in headers. */ | |
07c416ed | 524 | #if __GNUC_PREREQ (2, 7) && defined __OPTIMIZE__ \ |
de1c3ebb UD |
525 | && !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__ \ |
526 | && defined __extern_inline | |
eedbbe58 | 527 | # define __USE_EXTERN_INLINES 1 |
edf5b2d7 | 528 | #endif |
28f540f4 | 529 | |
28f540f4 | 530 | |
ce460d04 RM |
531 | /* This is here only because every header file already includes this one. |
532 | Get the definitions of all the appropriate `__stub_FUNCTION' symbols. | |
533 | <gnu/stubs.h> contains `#define __stub_FUNCTION' when FUNCTION is a stub | |
534 | that will always return failure (and set errno to ENOSYS). */ | |
535 | #include <gnu/stubs.h> | |
28f540f4 | 536 | |
28f540f4 | 537 | |
6ed0492f | 538 | #endif /* features.h */ |