Make logic reorganized for non-GNU toolchain

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@528 42af7a65-404d-4744-a932-0658087f49c3

examples/null/Makefile

@@ -49,15 +49,14 @@ BIN	= lib$(CONFIG_EXAMPLE)$(LIBEXT)
 all:	$(BIN)
 
 $(AOBJS): %$(OBJEXT): %.S
-	$(CC) -c $(CFLAGS) $< -o $@
+	$(call ASSEMBLE, $<, $@)
 
 $(COBJS): %$(OBJEXT): %.c
-	$(CC) -c $(CFLAGS) $< -o $@
+	$(call COMPILE, $<, $@)
 
 $(BIN):	$(OBJS)
 	@( for obj in $(OBJS) ; do \
-		$(AR) $@ $${obj} || \
-			{ echo "$(AR) $@ $obj FAILED!" ; exit 1 ; } ; \
+		$(call ARCHIVE, $@, $${obj}); \
 	done ; )
 
 .depend: Makefile $(SRCS)
@@ -67,7 +66,7 @@ $(BIN):	$(OBJS)
 depend: .depend
 
 clean:
-	rm -f $(BIN) *.o *.rel *.asm *.lst *.sym *.adb *~
+	rm -f $(BIN) *.o *.obj *.rel *.asm *.lst *.sym *.adb *~
 
 distclean: clean
 	rm -f Make.dep .depend