posix: switch to using posix_time.h and posix_signal.h

To avoid conflicts between the C library's `time.h` and signal.h use an "override" header (when necessary) for C libraries that do not themselves provide POSIX definitions in `time.h` or `signal.h`. Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>

Author: cfriedt

include/zephyr/posix/mqueue.h

@@ -7,10 +7,11 @@
 #ifndef ZEPHYR_INCLUDE_POSIX_MESSAGE_PASSING_H_
 #define ZEPHYR_INCLUDE_POSIX_MESSAGE_PASSING_H_
 
+#include <time.h>
+#include <signal.h>
+
 #include <zephyr/kernel.h>
-#include <zephyr/posix/time.h>
 #include <zephyr/posix/fcntl.h>
-#include <zephyr/posix/signal.h>
 #include <zephyr/posix/sys/stat.h>
 #include <zephyr/posix/posix_types.h>
 

include/zephyr/posix/posix_features.h

@@ -52,14 +52,6 @@
 #define _POSIX_BARRIERS _POSIX_VERSION
 #endif
 
-#ifdef CONFIG_POSIX_CLOCK_SELECTION
-#define _POSIX_CLOCK_SELECTION _POSIX_VERSION
-#endif
-
-#ifdef CONFIG_POSIX_CPUTIME
-#define _POSIX_CPUTIME _POSIX_VERSION
-#endif
-
 #ifdef CONFIG_POSIX_FSYNC
 #define _POSIX_FSYNC _POSIX_VERSION
 #endif
@@ -90,10 +82,6 @@
 #define _POSIX_MESSAGE_PASSING _POSIX_VERSION
 #endif
 
-#ifdef CONFIG_POSIX_MONOTONIC_CLOCK
-#define _POSIX_MONOTONIC_CLOCK _POSIX_VERSION
-#endif
-
 /* #define _POSIX_PRIORITIZED_IO (-1L) */
 
 #ifdef CONFIG_POSIX_PRIORITY_SCHEDULING
@@ -108,7 +96,6 @@
 #define _POSIX_READER_WRITER_LOCKS _POSIX_VERSION
 #endif
 
-/* #define _POSIX_REALTIME_SIGNALS (-1L) */
 /* #define _POSIX_REGEXP (-1L) */
 /* #define _POSIX_SAVED_IDS (-1L) */
 
@@ -161,10 +148,6 @@
 /* #define _POSIX_THREAD_ROBUST_PRIO_INHERIT (-1L) */
 /* #define _POSIX_THREAD_ROBUST_PRIO_PROTECT (-1L) */
 
-#ifdef CONFIG_POSIX_THREAD_SAFE_FUNCTIONS
-#define _POSIX_THREAD_SAFE_FUNCTIONS _POSIX_VERSION
-#endif
-
 /* #define _POSIX_THREAD_SPORADIC_SERVER (-1L) */
 
 #ifdef CONFIG_POSIX_THREADS
@@ -177,10 +160,6 @@
 #define _POSIX_TIMEOUTS _POSIX_VERSION
 #endif
 
-#ifdef CONFIG_POSIX_TIMERS
-#define _POSIX_TIMERS _POSIX_VERSION
-#endif
-
 /* #define _POSIX_TRACE (-1L) */
 /* #define _POSIX_TRACE_EVENT_FILTER (-1L) */
 /* #define _POSIX_TRACE_INHERIT (-1L) */

include/zephyr/posix/pthread.h

@@ -9,9 +9,9 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 
 #include <zephyr/kernel.h>
-#include <zephyr/posix/time.h>
 #include <zephyr/posix/unistd.h>
 #include <zephyr/posix/sched.h>
 

include/zephyr/posix/semaphore.h

@@ -6,7 +6,8 @@
 #ifndef ZEPHYR_INCLUDE_POSIX_SEMAPHORE_H_
 #define ZEPHYR_INCLUDE_POSIX_SEMAPHORE_H_
 
-#include <zephyr/posix/time.h>
+#include <time.h>
+
 #include <zephyr/posix/posix_types.h>
 
 #ifdef __cplusplus

include/zephyr/posix/signal.h

@@ -6,6 +6,8 @@
 #ifndef ZEPHYR_INCLUDE_POSIX_UNISTD_H_
 #define ZEPHYR_INCLUDE_POSIX_UNISTD_H_
 
+#include <time.h>
+
 #include <zephyr/posix/posix_types.h>
 
 #ifdef CONFIG_POSIX_API