Re: Kicking myself w/ Target specific variables on gmake 3.79.1

[chorn]

On 2001/04/09 23:54:36 -0400, Paul D. Smith wrote:

>   c> HOSTS := host1 host2 host3
>   c> INSTALL_HOSTS := $(addprefix install-,$(HOSTS))
> 
>   c> # Here's my "goal"
>   c> $(INSTALL_HOSTS) : $(INSTALL_DIR) := $(subst install-,$(NULL),$@)
>   c> $(INSTALL_HOSTS) : install-all
> 
>   c> install-all:
>   c>  copy foobar /somedir/$(INSTALL_DIR)
> 
> There's no way you can do this; I can't think of any way you can find
> out the parent of a given rule.  Using $@ won't work, as I mentioned
> before, because it will either be evaluated during read-in, when it is
> empty, or it will be evaluated when the command is to be invoked, when
> it has the value of the current target.
> 
> I don't see why it has to be so complicated, though, why not just
> pattern rules?
> 
>   HOSTS := host1 host2 host3
>   INSTALL_HOSTS := $(addprefix install-,$(HOSTS))
> 
>   install: $(INSTALL_HOSTS)
> 
>   install-%:
>         copy foobar /somedir/$*
> 
> ?? (you can do similar stuff with install-% if you want the install to
> come first).

It's complicated because there are a whole series of rules which use
$(INSTALL_DIR) in my example.  If I could get away with one rule just using
a pattern I would...

Consider:

install-%: install-part1 install-part2 install-part3 install-part4


Where you may need to run a specific part without running the rest.