proj: Add server.c in perf

proj/perf/Makefile

@@ -4,13 +4,16 @@ CFLAGS=-std=c99 -pedantic -Wall -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_SVID_SOURCE -
 
 .PHONY: all clean
 all: default
-default: main
+default: main server
 
-main.o: main.c
+%.o: %.c
 	$(CC) -c -o $@ $^ $(CFLAGS)
 
 main: main.o
 	$(CC) -o $@ $^ $(CFLAGS) -lc
 
+server: server.o
+	$(CC) -o $@ $^ $(CFLAGS) -lc
+
 clean:
 	rm -rf main *.o