Fix some compile warnings

Makefile

@@ -3,6 +3,7 @@ CFLAGS = -g -Wall
 
 objects = client.o dns_c.h socket_utils.o constructor.o c_utils.o parser.o
 
+all: build
 
 build: shell_lib.a
 	$(CC) $(CFLAGS) -o client client.c dns_client.a

Makefile.musl

@@ -3,6 +3,7 @@ CFLAGS = -g -Wall -static
 
 objects = client.o dns_c.h socket_utils.o constructor.o c_utils.o parser.o
 
+all: build
 
 build: shell_lib.a
 	$(CC) $(CFLAGS) -o client client.c dns_client.a

c_utils.h

@@ -19,3 +19,4 @@ void get_msg(char *msg, char *handle);
 void get_port(char *PORT, char *arg);
 int get_socket(char *PORT);
 int wait_and_listen(int listener);
+int client_get_socket(char *PORT, char *remote_host);

client.c

@@ -4,6 +4,7 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include "socket_utils.h"
+#include "c_utils.h"
 #include "constructor.h"
 #include "parser.h"
 #include "dns_c.h"
@@ -30,8 +31,9 @@ long long current_timestamp()
 
 int sockfd = 0;
 
-void *SendDNS(void *threadid)
+void *SendDNS(void *arg)
 {
+    int thread_id = (int)arg;
     struct DNS_REQUEST question;
     unsigned char answer[SIZE_OF_RESP];
     memset(answer, 0, SIZE_OF_RESP);
@@ -77,12 +79,12 @@ void *SendDNS(void *threadid)
      *  Sending request
      */
     assert(sockfd != 0);
-    printf("Thread %d sent a DNS query.\n", (int)threadid);
+    printf("Thread %d sent a DNS query.\n", thread_id);
     send(sockfd, question.query, question.size, 0);
     long long start_time = current_timestamp();
     int nb = recv(sockfd, answer, 512, 0);
     long long end_time = current_timestamp();
-    printf("Thread %d received a DNS answer with %d bytes. Time: %ld ms.\n", (int)threadid, nb, end_time - start_time);
+    printf("Thread %d received a DNS answer with %d bytes. Time: %lld ms.\n", thread_id, nb, end_time - start_time);
     // printf("====== %d ========\n", (long)threadid);
     // printf("RESPONSE:\n");
     // _hex_print(answer, 512);
@@ -94,9 +96,10 @@ void *SendDNS(void *threadid)
 int main(int argc, char **argv)
 {
     sockfd = client_get_socket(DNS_PORT, NAME_SERVER);
-    
+
     int num_threads = DEFAULT_NUM_THREADS;
-    if (argc >=2) num_threads = atoi(argv[1]);
+    if (argc >= 2)
+        num_threads = atoi(argv[1]);
 
     pthread_t threads[num_threads];
     for (int i = 0; i < num_threads; i++)

socket_utils.c

@@ -1,5 +1,5 @@
 #include "socket_utils.h"
-#include "c_utils.c"
+#include "c_utils.h"
 
 void *get_in_addr(struct sockaddr *sa){
     if (sa->sa_family == AF_INET) {