improved Makefile

session1/udp_echo/Makefile

@@ -1,14 +1,25 @@
-TARGETS = echo_server echo_client
+TARGETS = server client echo_server echo_client
 
 CC = gcc
-CFLAGS = -g -D$(DEFINES)
+CFLAGS = -g
+
+ifdef DEFINES
+	CFLAGS += -D$(DEFINES)
+endif
 
 all: $(TARGETS) Makefile
 clean:
 	rm -f $(TARGETS)
-	rm -f *.o *.~
+	rm -f *.o *~
 
-echo_server: echo_server.o
-echo_client: echo_client.o	
+server: server.o
+client: client.o
+
+# Compile with echo support
+echo_server: server.c
+	$(CC) $(CFLAGS) -DECHO $^ -o $@
+
+echo_client: client.c
+	$(CC) $(CFLAGS) -DECHO $^ -o $@
 
 .PHONY: all clean

session1/udp_echo/client.c

@@ -20,7 +20,7 @@ int main(int argc, char *argv[])
 {
 	int fd;
 	char *lineptr = NULL;
-	ssize_t linelen = 0;
+	size_t linelen = 0;
 
 	struct sockaddr_in sa = { .sin_family = AF_INET };
 

session1/udp_echo/server.c

@@ -45,7 +45,7 @@ int main(int argc, char *argv[])
 	while (1) {
 		salen = sizeof(sa);
 
-		msglen = recvfrom(fd, &line, sizeof(line), 0, (struct sockaddr *) &sa, &salen)
+		msglen = recvfrom(fd, &line, sizeof(line), 0, (struct sockaddr *) &sa, &salen);
 		if (msglen == -1)
 			handle_error("Failed to recv");