Re: Bug in $(call ...) ?

[Ken Smith]

Noel is exactly right.  I now understand what you want to do.  Here is a
modified file using eval.

X = echo
A = B = $($(1)) $$(1) $$(2)

# $(0) = "$($(1)) $$(1) $$(2)"
# $(1) = X
# -> B = "echo $(1) $(2)"
$(eval $(call A,X))


# should be the same string as $(B), right ?
C = echo $(1) $(2)

all:
# $(0) = "echo $(1) $(2)"
# $(1) = "hi"
# $(2) = "lo"
# -> $(call B,hi,lo) should be "echo hi lo",
# but instead is "echo $(1) $(2)"
        @echo '[$(call B,hi,lo)]'
# $(0) = "echo $(1) $(2)"
# $(1) = "hi"
# $(2) = "lo"
# -> $(call B,hi,lo) is "echo hi lo", as it should be.
        @echo '[$(call C,hi,lo)]'

  Ken

On Mon, Dec 20, 2004 at 10:57:03AM -0500, Noel Yap wrote:
> I'm not sure, but using $(eval) might help in your situation.
> 
> Alexey Neyman wrote:
> 
> >On Monday 20 December 2004 18:14, you wrote:
> >
> >>Double dollar sign causes a single dollar sign literal to be present 
> >>in the string.  I don't think that is what you want here.
> >
> >
> >Yes, but that dollar sign is accompanied by a left parenthesis, digit 
> >and a right parenthesis. I'd assume this character sequence to be 
> >replaced with positional argument when this string is passed as $(0) 
> >to the $(call). I mixed in comments to illustrate the way I assumed 
> >the evaluation should happen. Please point me to the line where I 
> >made a mistake.
> >
> >X = echo
> >A = $($(1)) $$(1) $$(2)
> >
> ># $(0) = "$($(1)) $$(1) $$(2)"
> ># $(1) = X
> ># -> B = "echo $(1) $(2)"
> >B := $(call A,X)
> >
> ># should be the same string as $(B), right ?
> >C = echo $(1) $(2)
> >
> >all:
> ># $(0) = "echo $(1) $(2)"
> ># $(1) = "hi"
> ># $(2) = "lo"
> ># -> $(call B,hi,lo) should be "echo hi lo",
> ># but instead is "echo $(1) $(2)"
> >        @echo '[$(call B,hi,lo)]'
> ># $(0) = "echo $(1) $(2)"
> ># $(1) = "hi"
> ># $(2) = "lo"
> ># -> $(call B,hi,lo) is "echo hi lo", as it should be.
> >        @echo '[$(call C,hi,lo)]'
> >
> >
> >>>       > On Mon, Dec 20, 2004 at 05:56:33PM +0300, Alexey Neyman 
> >
> >wrote: 
> >
> >>>Well, I'll use it, thanks. However, it seems that it's actually a 
> >>>workaround. Perhaps this Makefile will illustrate better what I 
> >
> >mean:
> >
> >>><<<<
> >>>X = echo
> >>>A = $($(1)) $$(1) $$(2)
> >>>B := $(call A,X)
> >>>C = echo $(1) $(2)
> >>>
> >>>$(warning "$(value B)")
> >>>$(warning "$(value C)")
> >>>
> >>>all:
> >>>       @echo '[$(call B,hi,lo)]'
> >>>       @echo '[$(call C,hi,lo)]'
> >>>
> >>>Note that the $(warning)s show that the values of B and C are the 
> >>>same. Yet, the results of echo differ:
> >>>
> >>>Makefile:6: "echo $(1) $(2)"
> >>>Makefile:7: "echo $(1) $(2)"
> >>>[echo $(1) $(2)]
> >>>[echo hi lo]
> >>>
> >>>
> >>>On Monday 20 December 2004 16:33, you wrote:
> >>>
> >>>>Perhaps the following modifications get you what you want.  I 
> >
> >think
> >
> >>>>perhaps you are just missing the passthrough for the numbered 
> >>>
> >>>parameters
> >>>
> >>>>for B.
> >>>>
> >>>>X = echo
> >>>>A = $($(1)) $(2) $(3)
> >>>>B = $(call A,X,$(1),$(2))
> >>>>
> >>>>all:    
> >>>>       @echo '[$(B)]'
> >>>>       @echo '[$(call B,hi,lo)]'
> >>>>       $(call B,hi,lo)
> >>>>
> >>>> Ken
> >>>>
> >>>>On Mon, Dec 20, 2004 at 01:40:02PM +0300, Alexey Neyman wrote:
> >>>>
> >>>>>Hi,
> >>>>>
> >>>>>address@hidden:~/tmp> cat Makefile
> >>>>>X = echo
> >>>>>A = $($(1)) $$(1) $$(2)
> >>>>>B = $(call A,X)
> >>>>>
> >>>>>all:
> >>>>>       @echo '[$(B)]'
> >>>>>       @echo '[$(call B,hi,lo)]'
> >>>>>address@hidden:~/tmp> make all
> >>>>>[echo $(1) $(2)]
> >>>>>[echo $(1) $(2)]
> >>>>>
> >>>>>I thought the "$(call B,hi,lo)" should have evaluated to "echo 
> >
> >hi 
> >
> >>>lo", 
> >>>
> >>>>>shouldn't it?
> >>>>>
> >>>>>Regards,
> >>>>>Alexey.
> >>>>>
> >>>>>-- 
> >>>>>Ah, an insult... a sometimes necessary and constructive 
> >
> >release of 
> >
> >>>>>tension.
> >>>>>                       -- Pkunks, SC2
> >>>>>
> >>>>>
> >>>>>_______________________________________________
> >>>>>Help-make mailing list
> >>>>>address@hidden
> >>>>>http://lists.gnu.org/mailman/listinfo/help-make
> >>>>
> >>>-- 
> >>>All are welcome to our nest.
> >>>We are Pkunk, we cannot help but love all.
> >>>                       -- Pkunks, SC2
> >>
> >