> On Tue, 9 Dec 2008, Sam Ravnborg wrote:
>
> > >
> > > i want to clean all that up and have make use an include-dir path
> > > and be able to change all of the above to, of course, the simpler:
> > >
> > > include someutil.mak
> >
> > Why not just use:
> >
> > include $(call magic,someutil.mak)
> >
> > Where magic is a macro that based on a variabes passed
> > or something decide on the directory to try.
> >
> > Something like this mockup for example:
> > magic = $(if $(wildcard $(mydir)/$1),$(mydir)/$1, \
> > $(if $(wildcard $(anotherdir)/$1),$(anotherdir)/$1,NOTFOUND))
> >
> > mydir could be set recursively or could be the dir of Makefile or
> > could be absolute.
> > In other words the possibilities are many to fidn the dir.
>
> perhaps i'm just being thick, but i don't see how this solves the
> problem. sure, that "magic" macro would work fine. but where would a
> makefile get its definition? it could get it via including a handy
> makefile of macros. and where would it find that handy makefile of
> macros to include? oh ...
>
> i would still like the ability to define something like
> --include-dir at the top level, and have that option propagate
> throughout my build to be used by all subsequent sub-makes. can't
> that be done?
>
> rday
>
> p.s. as a top-level solution, i can set up the alias
>
> alias mymake="make -I..."
>
> and tell everyone to use "mymake" from now on, so that's how i could
> get my includes into that top-level makefile. but it's the subsequent
> propagation through all submakes that is still an issue.
>
> perhaps i should just set an environment variable and have everyone
> do:
>
> include ${MKFILESDIR}/handy.mak
>
> but i still consider that aesthetically unpleasant. i want people to
> need to say nothing other than:
>
> include handy.mak
>
If you can change the top-level make, why not set a variable to the directory
(absolute path) from which the makefiles shall be included:
export MAKE_INCLUDE_DIR ?= /var/make/includes
and then use
vpath %.mak $(MAKE_INCLUDE_DIR)
in every sub-make (or in a generally used include-make)?
Or is this too simple?
BR,
Johan Bezem
http://www.bezem.de/creating-a-make-template-using-gnu-make/
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