fix: update function prototypes for -Wstrict-prototypes

apps/test_apps/iperf-cmd/main/main.c

@@ -19,7 +19,7 @@
 
 #include "iperf_cmd.h"
 
-void my_report_func()
+void my_report_func(void)
 {
     static int i  = 0;
     if (i == 0 ) {

iperf-cmd/README.md

@@ -48,7 +48,7 @@ This repository contains `iperf` command based esp-idf console.
 
   ```yaml
   dependencies:
-    espressif/iperf_cmd:
+    espressif/iperf-cmd:
       version: "^1.0.0"
   ```
 - For more details refer [IDF Component Manager](https://docs.espressif.com/projects/idf-component-manager/en/latest/)

iperf/iperf_report.c

@@ -63,7 +63,7 @@ static void iperf_print_connect_info(const iperf_report_t *report)
     }
 }
 
-static void iperf_print_traffic_header()
+static void iperf_print_traffic_header(void)
 {
     printf("\n[ ID] Interval\t\tTransfer\tBandwidth\n");
 }

iperf/linux_port/esp_timer_stub.c

@@ -216,7 +216,7 @@ void my_callback2(void* arg)
 {
     printf("Timer expired 2 \n");
 }
-int main()
+int main(void)
 {
     #include <unistd.h>
     esp_timer_handle_t timer;