exporting functions?

[Erik Rull]

Hi all,

I have a base Makefile that calls sub makefiles.

In the base file there is the following part:

assert_target_dir=$(assert_target_dir_cmd)

define assert_target_dir_cmd
        mkdir -p /home/user/target$(1)

endef

export assert_target_dir assert_target_dir_cmd

install:
        $(call assert_target_dir,/sbin)
        + make -f Makefile.install


in Makefile.install:

.PHONY: all
all:
        $(call assert_target_dir,/etc)
        [...]



What happens when I call make install:

mkdir -p /home/user/target/sbin
make -f Makefile.install
mkdir -p /home/user/target
                          ^^ here is /etc missing!

so basically the funtion gets "exported" but it seems to be not possible to 
give a parameter with the $(call ...)

What's wrong here? Am I doing something wrong? or is it not possible to 
define and export functions in such way?
Any ideas how to solve my issue?

Thanks a lot!

Best regards,

Erik