create library

Makefile

@@ -6,21 +6,28 @@ PROGRAM:=coap
 VERSION:=0.01
 DISTDIR=$(PROGRAM)-$(VERSION)
 FILES:=main.c Makefile $(SOURCES) $(HEADERS) 
+LIB:=libcoap.a
+LDFLAGS:=-L. -l$(patsubst lib%.a,%,$(LIB))
+ARFLAGS:=cru
 
 # add this for Solaris
-#LDFLAGS:=-lsocket -lnsl
+#LDFLAGS+=-lsocket -lnsl
 
 .PHONY: clean distclean
 
-$(PROGRAM):	main.o $(OBJECTS)
-	$(CC) $(LDFLAGS) -o $@ $^
+$(PROGRAM):	main.o $(LIB)
+	$(CC) -o $@ $< $(LDFLAGS)
+
+$(LIB):	$(OBJECTS)
+	$(AR) $(ARFLAGS) $@ $^ 
+	ranlib $@
 
 # build main.o separately as c99 has no getaddrinfo, so CC will complain
 main.o:	main.c
 	$(CC) -g -Wall -c -o main.o main.c 
 
 clean:
-	@rm -f $(PROGRAM) main.o $(OBJECTS)
+	@rm -f $(PROGRAM) main.o $(LIB) $(OBJECTS)
 
 distclean:	clean
 	@rm -rf $(DISTDIR)