diff --git a/arch/posix/include/posix_soc_if.h b/arch/posix/include/posix_soc_if.h
index 26d2152a9a4..1e90693dc93 100644
--- a/arch/posix/include/posix_soc_if.h
+++ b/arch/posix/include/posix_soc_if.h
@@ -14,14 +14,12 @@
  * or all its boards
  */
 
+#include "posix_trace.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-void posix_print_error_and_exit(const char *format, ...);
-void posix_print_warning(const char *format, ...);
-void posix_print_trace(const char *format, ...);
-
 void posix_halt_cpu(void);
 void posix_atomic_halt_cpu(unsigned int imask);
 
diff --git a/arch/posix/include/posix_trace.h b/arch/posix/include/posix_trace.h
new file mode 100644
index 00000000000..1a71a1e7abf
--- /dev/null
+++ b/arch/posix/include/posix_trace.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2018 Oticon A/S
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#ifndef _POSIX_TRACE_H
+#define _POSIX_TRACE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void posix_print_error_and_exit(const char *format, ...);
+void posix_print_warning(const char *format, ...);
+void posix_print_trace(const char *format, ...);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/boards/posix/native_posix/cmdline.c b/boards/posix/native_posix/cmdline.c
index 3f40a3a974b..fdfcf71dd3c 100644
--- a/boards/posix/native_posix/cmdline.c
+++ b/boards/posix/native_posix/cmdline.c
@@ -13,6 +13,7 @@
 #include "timer_model.h"
 #include "cmdline.h"
 #include "toolchain.h"
+#include "posix_trace.h"
 
 static int s_argc, test_argc;
 static char **s_argv, **test_argv;
diff --git a/boards/posix/native_posix/cmdline_common.c b/boards/posix/native_posix/cmdline_common.c
index 5af4aaa2a10..551f986d3cd 100644
--- a/boards/posix/native_posix/cmdline_common.c
+++ b/boards/posix/native_posix/cmdline_common.c
@@ -10,7 +10,8 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <math.h>
-#include "posix_soc_if.h"
+#include "posix_trace.h"
+#include "posix_board_if.h"
 #include "zephyr/types.h"
 #include "cmdline_common.h"
 
diff --git a/boards/posix/native_posix/cmdline_common.h b/boards/posix/native_posix/cmdline_common.h
index d8b715b5df5..7d16ce8b09b 100644
--- a/boards/posix/native_posix/cmdline_common.h
+++ b/boards/posix/native_posix/cmdline_common.h
@@ -74,6 +74,9 @@ int cmd_is_option(const char *arg, const char *option, int with_value);
 int cmd_is_help_option(const char *arg);
 void cmd_read_option_value(const char *str, void *dest, const char type,
 			   const char *option);
+void cmd_args_set_defaults(struct args_struct_t args_struct[]);
+bool cmd_parse_one_arg(char *argv, struct args_struct_t args_struct[]);
+void cmd_print_switches_help(struct args_struct_t args_struct[]);
 
 #ifdef __cplusplus
 }
diff --git a/boards/posix/native_posix/native_rtc.c b/boards/posix/native_posix/native_rtc.c
index 970b5384b4c..5259a030fa0 100644
--- a/boards/posix/native_posix/native_rtc.c
+++ b/boards/posix/native_posix/native_rtc.c
@@ -11,6 +11,7 @@
 #include "native_rtc.h"
 #include "hw_models_top.h"
 #include "timer_model.h"
+#include "posix_trace.h"
 
 /**
  * Return the (simulation) time in microseconds
diff --git a/boards/posix/native_posix/timer_model.c b/boards/posix/native_posix/timer_model.c
index b44524a8dba..c1c579e7fed 100644
--- a/boards/posix/native_posix/timer_model.c
+++ b/boards/posix/native_posix/timer_model.c
@@ -26,7 +26,7 @@
 #include "irq_ctrl.h"
 #include "board_soc.h"
 #include "zephyr/types.h"
-#include "posix_soc_if.h"
+#include "posix_trace.h"
 #include "misc/util.h"
 #include "cmdline.h"
 #include "soc.h"
diff --git a/drivers/console/native_posix_console.c b/drivers/console/native_posix_console.c
index 1786e4baafd..6ed8344b0aa 100644
--- a/drivers/console/native_posix_console.c
+++ b/drivers/console/native_posix_console.c
@@ -9,6 +9,7 @@
 #include "init.h"
 #include "kernel.h"
 #include "console/console.h"
+#include "posix_board_if.h"
 #include <string.h>
 #include <sys/time.h>
 #include <sys/select.h>
diff --git a/drivers/entropy/fake_entropy_native_posix.c b/drivers/entropy/fake_entropy_native_posix.c
index 7c64ebb3b0e..b41a7444f80 100644
--- a/drivers/entropy/fake_entropy_native_posix.c
+++ b/drivers/entropy/fake_entropy_native_posix.c
@@ -17,7 +17,7 @@
 #include "misc/util.h"
 #include <stdlib.h>
 #include <string.h>
-#include "posix_soc_if.h"
+#include "posix_trace.h"
 #include "soc.h"
 #include "cmdline.h" /* native_posix command line options header */
 
diff --git a/drivers/timer/native_posix_timer.c b/drivers/timer/native_posix_timer.c
index 1d8fa7536ec..bc70222abaa 100644
--- a/drivers/timer/native_posix_timer.c
+++ b/drivers/timer/native_posix_timer.c
@@ -18,7 +18,7 @@
 #include "sys_clock.h"
 #include "timer_model.h"
 #include "soc.h"
-#include "posix_soc_if.h"
+#include "posix_trace.h"
 
 static u64_t tick_period; /* System tick period in number of hw cycles */
 static s64_t silent_ticks;