CC=gcc
CFLAGS=-g
-build: client server
+build: client server client_lf server_lf
client: client.o
server: server.o
+client_lf: client_lf.o
+
+server_lf: server_lf.o
+
client.o: client.c
server.o: server.c
+
+client_lf.o: client_lf.c
+
+server_lf.o: server_lf.c