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49 * _POSIX_SOURCE (deprecated by _POSIX_C_SOURCE=1)
50 * _POSIX_C_SOURCE >= 1
51 * POSIX.1-1990
57 * POSIX.1b-1993 Real-time extensions
60 * POSIX.1c-1995 Threads extensions
63 * POSIX.1-2001 and C99
66 * POSIX.1-2008
69 * POSIX.1-2024
72 * POSIX.1-1990 and XPG4
78 * SUSv2 (POSIX.1c-1995 plus XSI)
81 * SUSv3 (POSIX.1-2001 plus XSI) and C99
84 * SUSv4 (POSIX.1-2008 plus XSI)
109 * _FORTIFY_SOURCE = 1, 2 or 3
118 #define _ATFILE_SOURCE 1
120 #define _DEFAULT_SOURCE 1
122 #define _ISOC99_SOURCE 1
124 #define _ISOC11_SOURCE 1
126 #define _ISOC2X_SOURCE 1
128 #define _POSIX_SOURCE 1
134 #define _XOPEN_SOURCE_EXTENDED 1
136 #define _LARGEFILE64_SOURCE 1
150 #define _ZEPHYR_SOURCE 1
159 #define _DEFAULT_SOURCE 1
164 #define _POSIX_SOURCE 1
172 #define _POSIX_SOURCE 1
186 #define _ATFILE_SOURCE 1
191 #define _ISOC99_SOURCE 1
193 #define _ISOC11_SOURCE 1
195 #define _ANSI_SOURCE 1
205 * any version of POSIX.1; enabled by default, or with _POSIX_SOURCE,
213 * POSIX.1b-1993; enabled by default, with _POSIX_C_SOURCE >= 199309L,
217 * POSIX.1c-1995; enabled by default, with _POSIX_C_SOURCE >= 199506L,
221 * POSIX.1-2001; enabled by default, with _POSIX_C_SOURCE >= 200112L,
225 * POSIX.1-2008; enabled by default, with _POSIX_C_SOURCE >= 200809L,
229 * POSIX.1-2024; enabled by default, with _POSIX_C_SOURCE >= 202405L,
288 * Object Size Checking; defined to 0 (off), 1, 2 or 3.
298 #define __ATFILE_VISIBLE 1
304 #define __BSD_VISIBLE 1
310 #define __GNU_VISIBLE 1
316 #define __ZEPHYR_VISIBLE 1
335 #define __LARGEFILE_VISIBLE 1
341 #define __LARGEFILE64_VISIBLE 1
347 #define __MISC_VISIBLE 1
371 #define __SVID_VISIBLE 1
385 #define __XSI_VISIBLE 1
391 (__OPTIMIZE__ > 0 || defined(__clang__)) && __GNUC_PREREQ__(4, 1) && \
399 # elif _FORTIFY_SOURCE > 1
402 # define __SSP_FORTIFY_LEVEL 1
411 #define _POSIX_JOB_CONTROL 1
412 #define _POSIX_SAVED_IDS 1
414 #define _POSIX_ASYNCHRONOUS_IO 1
415 #define _POSIX_FSYNC 1
416 #define _POSIX_MAPPED_FILES 1
417 #define _POSIX_MEMLOCK 1
418 #define _POSIX_MEMLOCK_RANGE 1
419 #define _POSIX_MEMORY_PROTECTION 1
420 #define _POSIX_MESSAGE_PASSING 1
423 #define _POSIX_PRIORITIZED_IO 1
424 #define _POSIX_PRIORITY_SCHEDULING 1
425 #define _POSIX_REALTIME_SIGNALS 1
426 #define _POSIX_SEMAPHORES 1
427 #define _POSIX_SHARED_MEMORY_OBJECTS 1
428 #define _POSIX_SYNCHRONIZED_IO 1
429 #define _POSIX_TIMERS 1
435 /* In P1003.1b but defined by drafts at least as early as P1003.1c/D10 */
436 #define _POSIX_THREADS 1
437 #define _POSIX_THREAD_ATTR_STACKADDR 1
438 #define _POSIX_THREAD_ATTR_STACKSIZE 1
439 #define _POSIX_THREAD_PRIORITY_SCHEDULING 1
440 #define _POSIX_THREAD_PRIO_INHERIT 1
441 #define _POSIX_THREAD_PRIO_PROTECT 1
442 #define _POSIX_THREAD_PROCESS_SHARED 1
443 #define _POSIX_THREAD_SAFE_FUNCTIONS 1
446 #define _POSIX_SPAWN 1
447 #define _POSIX_TIMEOUTS 1
448 #define _POSIX_CPUTIME 1
449 #define _POSIX_THREAD_CPUTIME 1
450 #define _POSIX_SPORADIC_SERVER 1
451 #define _POSIX_THREAD_SPORADIC_SERVER 1
452 #define _POSIX_DEVICE_CONTROL 1
453 #define _POSIX_DEVCTL_DIRECTION 1
454 #define _POSIX_INTERRUPT_CONTROL 1
455 #define _POSIX_ADVISORY_INFO 1
458 #define _UNIX98_THREAD_MUTEX_ATTRIBUTES 1
467 #define _POSIX_THREADS 1
468 #define _POSIX_THREAD_PRIORITY_SCHEDULING 1
473 # define _POSIX_JOB_CONTROL 1
474 # define _POSIX_SAVED_IDS 1