Re: Question Regarding Emile van Bergen's Non-Recursive Make

[Mike Shal]

On 12/1/08, Davidson, Josh <address@hidden> wrote:
> Ok, I'm close to getting this working.  I'm trying to find an
>  alternative to doing:
>
>  dir := moduleA
>  include $(dir)/Rules.mk
>  dir := moduleB
>  include $(dir)/Rules.mk
>  dir := moduleC
>  include $(dir)/Rules.mk
>  #etc
>
>  Normally, I would do something like
>  MODULES = moduleA moduleB moduleC #etc
>  include $(addsuffix /Rules.mk, $(MODULES))
>
>  However, I need to set dir before adding the include.  Is there a trick
>  to doing that?

You can try to pull the directory name from the MAKEFILE_LIST
variable, which will have the Makefiles included up to that point (I
think that was added in make 3.80, though). For example (using % as
the prompt):

% cat Makefile
# macro to pull out the last entry in a list
last = $(if $1,$(word $(words $1),$1))

# macro to find the most recent Rules.mk file
makefile = $(call last,$(filter %/Rules.mk,$(MAKEFILE_LIST)))

dir = $(patsubst %/Rules.mk,%,$(makefile))

MODULES = ant bee
include $(MODULES:%=%/Rules.mk)

% cat ant/Rules.mk
$(warning in ant, dir=$(dir))

% cat bee/Rules.mk
$(warning in bee, dir=$(dir))

MODULES = test
include $(MODULES:%=$(dir)/%/Rules.mk)

% cat bee/test/Rules.mk
$(warning in bee/test, dir=$(dir))

% make
ant/Rules.mk:1: in ant, dir=ant
bee/Rules.mk:1: in bee, dir=bee
bee/test/Rules.mk:1: in bee/test, dir=bee/test
make: *** No targets.  Stop.

You could also try to derive the MODULES from doing a $(wildcard
$(dir)/*/Rules.mk) or something instead of setting it in each Rules.mk
file. I use a similar setup for the Makefiles in marfitude, and it
seems to work reasonably well. Most of the per-directory Makefile
stubs end up fairly empty.

Hope that helps,
-Mike