Re: [avr-gcc-list] Code version timestamp

[Dave Hansen]

From: "Anton Erasmus" <address@hidden>

> On 14 Sep 2005 at 6:21, John Altstadt wrote:
[...]
> > %.elf: $(OBJ)
> >          @echo
> >          @echo $(MSG_LINKING) $@
> >          $(CC) $(ALL_CFLAGS) $^ --output $@ $(LDFLAGS)
> >          rm version.o
>
> There is a better way to force the recompile of version.c
> Add the following at the end of your makefile
>
> # Always compile version.c to get correct compilation date and time
> .PHONY: version.c

ITYM

.PHONY: version.o

Another method that works with make utilities besides GNU's (and is perhaps 
more self-documenting) is

version.o: FORCE

FORCE:

IOW, make version.o depend on FORCE, and make FORCE a phony target (no 
prerequisites and no commands).  As long as you don't make a file named 
FORCE, version.o will always be made (compiled from version.c)  Of course, 
if you are using GNU make, it's good to add

.PHONY: FORCE

so FORCEd commands are executed even if a file named FORCE is created...

Regards,
  -=Dave