log: net: move log_backend_net_get() to header

This moves the declaration of log_backend_net_get() to
zephyr/logging/log_backend_net.h

Signed-off-by: Fin Maaß <f.maass@vogl-electronic.com>

include/zephyr/logging/log_backend_net.h

@@ -61,6 +61,15 @@ static inline void log_backend_net_hostname_set(const char *hostname, size_t len
 }
 #endif
 
+/**
+ * @brief Get the net logger backend
+ *
+ * @details This function returns the net logger backend.
+ *
+ * @return Pointer to the net logger backend.
+ */
+const struct log_backend *log_backend_net_get(void);
+
 #ifdef __cplusplus
 }
 #endif

samples/net/syslog_net/src/main.c

@@ -19,10 +19,6 @@ BUILD_ASSERT(IS_ENABLED(CONFIG_LOG_BACKEND_NET), "syslog backend not enabled");
 
 #define SLEEP_BETWEEN_PRINTS 3
 
-#if defined(CONFIG_LOG_BACKEND_NET)
-extern const struct log_backend *log_backend_net_get(void);
-#endif
-
 int main(void)
 {
 	int i, count, sleep;

subsys/logging/backends/log_backend_net.c

@@ -42,8 +42,6 @@ static struct log_backend_net_ctx {
 	.sock = -1,
 };
 
-const struct log_backend *log_backend_net_get(void);
-
 static int line_out(uint8_t *data, size_t length, void *output_ctx)
 {
 	struct log_backend_net_ctx *ctx = (struct log_backend_net_ctx *)output_ctx;

subsys/net/lib/config/init.c

@@ -16,6 +16,7 @@ LOG_MODULE_REGISTER(net_config, CONFIG_NET_CONFIG_LOG_LEVEL);
 #include <stdlib.h>
 
 #include <zephyr/logging/log_backend.h>
+#include <zephyr/logging/log_backend_net.h>
 #include <zephyr/net/ethernet.h>
 #include <zephyr/net/net_core.h>
 #include <zephyr/net/net_ip.h>
@@ -30,7 +31,6 @@ LOG_MODULE_REGISTER(net_config, CONFIG_NET_CONFIG_LOG_LEVEL);
 #include "ieee802154_settings.h"
 #include "bt_settings.h"
 
-extern const struct log_backend *log_backend_net_get(void);
 extern int net_init_clock_via_sntp(void);
 
 static K_SEM_DEFINE(waiter, 0, 1);