Re: Problem about multiple targets

[Oleksandr Gavenko]

On 17.09.2010 10:33, Philip Guenther wrote:
> On Thu, Sep 16, 2010 at 6:21 PM, 董理<address@hidden>  wrote:
> > I want to write a rule with multiple targets as following:
> >
> >         ${TARGET}: $(addsuffix .F90, $@) ${OBJECT}
> >                 ...
>
> You almost certainly do not want a multiple target rule, because that
> would make *each* ${TARGET} depend on *all* the matching .F90 source
> files: changing *any* source file would require recompiling *all* the
> target files!
>
> Instead, I think you want just a static pattern rule, such as
>
> ${TARGET}: %: %.F90 ${OBJECT}
>          ...
Another possibility use .SECONDEXPANSION, but this case unusual
(look to duplicated $$ sign!):

.SECONDEXPANSION:
${TARGET}: $$(addsuffix .F90,$$@) ${OBJECT}

--
С уважением, Александр Гавенко.