tests: posix: net: fix missing clock_t and clockid_t with newlib

Fix errors found in CI for missing clock_t and clockid_t types
when building the tests/posix/net testsuite against newlib.

Also use angle-brackets and prefixed path with
`<zephyr/posix/posix_types.h>` since it is not in the default
search path and is analagous to `<sys/types.h>`.

Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>

include/zephyr/posix/dirent.h

@@ -7,7 +7,8 @@
 #define ZEPHYR_INCLUDE_POSIX_DIRENT_H_
 
 #include <limits.h>
-#include "posix_types.h"
+
+#include <zephyr/posix/posix_types.h>
 
 #ifdef CONFIG_POSIX_FILE_SYSTEM
 #include <zephyr/fs/fs.h>

include/zephyr/posix/mqueue.h

@@ -12,7 +12,7 @@
 #include <zephyr/posix/fcntl.h>
 #include <zephyr/posix/signal.h>
 #include <zephyr/posix/sys/stat.h>
-#include "posix_types.h"
+#include <zephyr/posix/posix_types.h>
 
 #ifdef __cplusplus
 extern "C" {

include/zephyr/posix/posix_types.h

@@ -11,6 +11,18 @@
 #include <sys/types.h>
 #endif
 
+#if !defined(_CLOCK_T_DECLARED) && !defined(__clock_t_defined)
+typedef unsigned long clock_t;
+#define _CLOCK_T_DECLARED
+#define __clock_t_defined
+#endif
+
+#if !defined(_CLOCKID_T_DECLARED) && !defined(__clockid_t_defined)
+typedef unsigned long clockid_t;
+#define _CLOCKID_T_DECLARED
+#define __clockid_t_defined
+#endif
+
 #ifdef CONFIG_NEWLIB_LIBC
 #include <sys/_pthreadtypes.h>
 #endif

include/zephyr/posix/sched.h

@@ -7,8 +7,7 @@
 #define ZEPHYR_INCLUDE_POSIX_SCHED_H_
 
 #include <zephyr/kernel.h>
-
+#include <zephyr/posix/posix_types.h>
-#include "posix_types.h"
 
 #include <time.h>
 

include/zephyr/posix/semaphore.h

@@ -7,7 +7,7 @@
 #define ZEPHYR_INCLUDE_POSIX_SEMAPHORE_H_
 
 #include <zephyr/posix/time.h>
-#include "posix_types.h"
+#include <zephyr/posix/posix_types.h>
 
 #ifdef __cplusplus
 extern "C" {

include/zephyr/posix/signal.h

@@ -6,7 +6,8 @@
 #ifndef ZEPHYR_INCLUDE_POSIX_SIGNAL_H_
 #define ZEPHYR_INCLUDE_POSIX_SIGNAL_H_
 
-#include "posix_types.h"
+/* include posix_types.h before posix_features.h (here) to avoid build errors against newlib */
+#include <zephyr/posix/posix_types.h>
 #include "posix_features.h"
 
 #ifdef __cplusplus

include/zephyr/posix/sys/select.h

@@ -6,6 +6,7 @@
 #ifndef ZEPHYR_INCLUDE_POSIX_SYS_SELECT_H_
 #define ZEPHYR_INCLUDE_POSIX_SYS_SELECT_H_
 
+#include <zephyr/posix/posix_types.h>
 #include <zephyr/sys/fdtable.h>
 
 #ifdef __cplusplus

include/zephyr/posix/time.h

@@ -58,7 +58,7 @@ struct itimerspec {
 
 #include <zephyr/kernel.h>
 #include <errno.h>
-#include "posix_types.h"
+#include <zephyr/posix/posix_types.h>
 #include <zephyr/posix/signal.h>
 
 #ifdef __cplusplus

include/zephyr/posix/unistd.h

@@ -6,7 +6,7 @@
 #ifndef ZEPHYR_INCLUDE_POSIX_UNISTD_H_
 #define ZEPHYR_INCLUDE_POSIX_UNISTD_H_
 
-#include "posix_types.h"
+#include <zephyr/posix/posix_types.h>
 
 #ifdef CONFIG_POSIX_API
 #include <zephyr/fs/fs.h>

tests/posix/net/CMakeLists.txt

@@ -7,3 +7,5 @@ project(posix_net)
 FILE(GLOB app_sources src/*.c)
 
 target_sources(app PRIVATE ${app_sources})
+
+target_compile_options(app PRIVATE -U_POSIX_C_SOURCE -D_POSIX_C_SOURCE=200809L)