Improve makefile

Makefile

@@ -1,16 +1,17 @@
 # 
-# gcc -I/usr/include -L/usr/lib  -lperfstat -o test test.c
+# Use GNU-Make (gmake) for building
+# 
+bin = aix-disk-perfstat
+src = $(wildcard *.c)
+obj = $(src:.c=.o)
 
-CC=gcc
-CFLAGS=
-BIN=aix-disk-perfstat
+CC = gcc
+LDFLAGS = -lperfstat
 
-default: main
-
-main: main.o 
-	$(CC) -lperfstat -o $(BIN) main.c
+$(bin): $(obj)
+	$(CC) -o $@ $^ $(LDFLAGS)
 
+.PHONY: clean
 clean:
-	-rm -f main.o
-	-rm -f $(BIN)
+	rm -f $(obj) $(bin)