From 8471ac68a8eaf796d29f7c1f5a309aab271f5d83 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Thu, 12 Sep 2024 15:15:41 -0700
Subject: [PATCH] tests, samples: Define _POSIX_C_SOURCE where needed

Various tests and samples use POSIX-only functions. Define _POSIX_C_SOURCE
to ensure they are visible.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 samples/posix/gettimeofday/src/main.c |  2 ++
 tests/lib/c_lib/common/src/main.c     | 10 +++-------
 tests/posix/fs/src/test_fs_dir.c      |  3 +++
 tests/posix/fs/src/test_fs_stat.c     |  3 +++
 4 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/samples/posix/gettimeofday/src/main.c b/samples/posix/gettimeofday/src/main.c
index 182debd5f9f5d06..922be148a778916 100644
--- a/samples/posix/gettimeofday/src/main.c
+++ b/samples/posix/gettimeofday/src/main.c
@@ -4,6 +4,8 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#undef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 200809L
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
diff --git a/tests/lib/c_lib/common/src/main.c b/tests/lib/c_lib/common/src/main.c
index f7db63c0ad8609f..7a0e0dbd6b2e85b 100644
--- a/tests/lib/c_lib/common/src/main.c
+++ b/tests/lib/c_lib/common/src/main.c
@@ -15,10 +15,8 @@
  * it guarantee that ALL functionality provided is working correctly.
  */
 
-#if defined(CONFIG_NATIVE_LIBC)
 #undef _POSIX_C_SOURCE
 #define _POSIX_C_SOURCE 200809L
-#endif
 
 #include <zephyr/kernel.h>
 #include <zephyr/sys/__assert.h>
@@ -1118,11 +1116,6 @@ ZTEST(libc_common, test_time_asctime)
 	zassert_equal(strncmp("Fri Jun  1 14:30:10 2024\n", asctime(&tp), sizeof(buf)), 0);
 
 	if (IS_ENABLED(CONFIG_COMMON_LIBC_ASCTIME_R)) {
-		zassert_is_null(asctime_r(NULL, buf));
-		zassert_is_null(asctime(NULL));
-
-		zassert_is_null(asctime_r(&tp, NULL));
-
 		tp.tm_wday = 8;
 		zassert_is_null(asctime_r(&tp, buf));
 		zassert_is_null(asctime(&tp));
@@ -1166,6 +1159,9 @@ ZTEST(libc_common, test_time_ctime)
 	char buf[26] = {0};
 	time_t test1 = 1718260000;
 
+#ifdef CONFIG_NATIVE_LIBC
+	setenv("TZ", "UTC", 1);
+#endif
 	zassert_not_null(ctime_r(&test1, buf));
 	zassert_equal(strncmp("Thu Jun 13 06:26:40 2024\n", buf, sizeof(buf)), 0);
 
diff --git a/tests/posix/fs/src/test_fs_dir.c b/tests/posix/fs/src/test_fs_dir.c
index e52741276f5de68..9cd58525ad19939 100644
--- a/tests/posix/fs/src/test_fs_dir.c
+++ b/tests/posix/fs/src/test_fs_dir.c
@@ -4,6 +4,9 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#undef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 200809L
+
 #include <stdio.h>
 #include <fcntl.h>
 #include <zephyr/posix/unistd.h>
diff --git a/tests/posix/fs/src/test_fs_stat.c b/tests/posix/fs/src/test_fs_stat.c
index 14167d3f7756c0f..469abcdca45be59 100644
--- a/tests/posix/fs/src/test_fs_stat.c
+++ b/tests/posix/fs/src/test_fs_stat.c
@@ -4,6 +4,9 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#undef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 200809L
+
 #include <string.h>
 #include <zephyr/posix/fcntl.h>
 #include <zephyr/posix/unistd.h>