Fix compilation error

packet-exchange/src/client.c

@@ -89,8 +89,6 @@ static enum TSNTask tsn_task;
 static struct timespec measures_start;
 static struct timespec measures_end;
 static char send_data[MAX_BUFFER_SIZE];
-static int latency_target_fd = -1;
-static int32_t latency_target_value = 0;
 
 static void help(char *argv[]) {
   printf(

packet-exchange/src/common.c

 #define _GNU_SOURCE
 #include "common.h"
 
+#include <errno.h>
+#include <error.h>
+#include <fcntl.h>
 #include <inttypes.h>
+#include <limits.h>
+#include <pthread.h>
+#include <sched.h>
 #include <signal.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
 #include <time.h>
 #include <unistd.h>
 
+static int latency_target_fd = -1;
+static int32_t latency_target_value = 0;
+
 void (*previous_handlers[NSIG])(int);
 static void (*sighand)(int);
 
@@ -64,7 +77,7 @@ void set_latency_target(void) {
 void add_ns(struct timespec *t, uint64_t ns) {
   t->tv_nsec += ns;
 
-  while (t->tv_nsec >= ((int64_t) NSEC_PER_SEC)) {
+  while (t->tv_nsec >= ((int64_t)NSEC_PER_SEC)) {
     t->tv_sec += 1;
     t->tv_nsec -= NSEC_PER_SEC;
   }