header fix

inc/Utils.h

@@ -11,6 +11,7 @@
 #include <string.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>
+#include <sys/wait.h>
 #ifdef __linux__
 #include <bits/stdc++.h>
 #endif
@@ -21,9 +22,6 @@ using std::get;
 using std::tuple_element;
 using std::tuple;
 
-static pthread_mutex_t thread_counter_lock = PTHREAD_MUTEX_INITIALIZER;
-static int thread_counter = 0;
-
 vector<string> splitString(string s, string delimiter);
 string getIP();
 string getIP(const char * host);