Re: quoting $$ (or something completely different?)

[Tom Bachmann]

Paul D. Smith wrote:
> %% Tom Bachmann <address@hidden> writes:
>
>   tb> I'm trying to transform $(NAME)_CFLAGS  := $$(CFLAGS) into $(eval $(call 
>   tb> SET,CFLAGS)), but I don't get it right.
>
>   tb> define SET
>   tb> $$(NAME)_$(1) := $$$$($(1))
>   tb> endef
>
>   tb> seems not to work. If I "hardcode" the sequence, everything works fine.
>
>   tb> To give you some context:
>   tb> a main makefile does $(eval $(call FOOFN,foo)) and this FOOFN does 
>   tb> $(eval $(call SET,CFLAGS)).
>
> Sorry, but this description is not sufficient for us to determine your
> problem. 

I thought it was, because the initial sequence worked just fine.

> Please write a complete, but simple, makefile that
> demonstrates your problem and show how you invoked it and what the
> result was, and why that was wrong.  Just saying it's not right doesn't
> mean anything to us.

I cannot provide much more information: CFLAGS seems not to be set at all.

> See http://www.catb.org/~esr/faqs/smart-questions.html.
>
>
> The information you provide above is not complete: you say you call this
> in your makefile:
>
>   $(eval $(call FOOFN,foo))
>
> then you say that FOOFN does this:
>
>   $(eval $(call SET,CFLAGS))
>
> where SET is this:
>
>   define SET
>   $$(NAME)_$(1) := $$$$($(1))
>   endef
>
> There has to be more than this, because here $(NAME) has no value. 

It is defined as

NAME = $(subst /,_,$(1))

so yes, here NAME is supposed to be foo.

> I
> can only assume from your description that you intend $(NAME) to have
> the value "foo" (the argument you use when you call FOOFN), but that
> transition is not shown here, and is certainly critical to the behavior.

In the attached makefile, foo_bar_CFLAGS is set to `$(CFLAGS)', if I use 
3 `$' for quoting in SET, foo_bar_CFLAGS is not set at all.
--
-ness-


NAME = $(subst /,_,$(1))

define SET
$$(NAME)_$(1) := $$$$($(1))
endef

define FOO
CFLAGS := foo bar baz foo2
$(eval $(call SET,CFLAGS))
endef

$(eval $(call FOO,foo/bar))

all:
        @echo '$(foo_bar_CFLAGS)'