From 1b94864a87f0017d0c709225e556efec161bd1e8 Mon Sep 17 00:00:00 2001
From: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
Date: Thu, 28 Dec 2023 11:45:30 +0100
Subject: [PATCH] drivers epprom_simulator: Set standard source macro
 appropriately

This file uses several functions which are extensions to the the
std C library. Let's explicity select one of the extensions
which includes it instead of relaying on somebody having
set it for this file somewhere else.

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
---
 drivers/eeprom/eeprom_simulator.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/eeprom/eeprom_simulator.c b/drivers/eeprom/eeprom_simulator.c
index 2e8d0ca665..19efa5b3d9 100644
--- a/drivers/eeprom/eeprom_simulator.c
+++ b/drivers/eeprom/eeprom_simulator.c
@@ -7,6 +7,20 @@
 
 #define DT_DRV_COMPAT zephyr_sim_eeprom
 
+#ifdef CONFIG_ARCH_POSIX
+#undef _POSIX_C_SOURCE
+/* Note: This is used only for interaction with the host C library, and is therefore exempt of
+ * coding guidelines rule A.4&5 which applies to the embedded code using embedded libraries
+ */
+#define _POSIX_C_SOURCE 200809L
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include "cmdline.h"
+#include "soc.h"
+#endif
+
 #include <zephyr/device.h>
 #include <zephyr/drivers/eeprom.h>
 
@@ -17,15 +31,6 @@
 #include <string.h>
 #include <errno.h>
 
-#ifdef CONFIG_ARCH_POSIX
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <fcntl.h>
-#include "cmdline.h"
-#include "soc.h"
-#endif
-
 #define LOG_LEVEL CONFIG_EEPROM_LOG_LEVEL
 #include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(eeprom_simulator);