On Wed, Dec 8, 2010 at 5:29 AM, Warlich, Christof
<[email protected]> wrote:
> I tried to use environment variables in the example above, which doesn't seem
> to work (why?), but there may be better ways ?!
You're barking up the wrong tree. Each line of the recipe is passed by
make to a separate instance of the shell. Each of these processes is
the child of make, thus making them siblings. Environment variables
won't work for the same reason you can't inherit a trait from your
sister.
If you're using make 3.82 the simplest fix is to add the line
.ONESHELL:
to the Makefile. This will cause all lines of each recipe to be
grafted together and passed to a single shell instance which makes
communication much easier. If using an older version you need to do
the grafting manually, e.g.:
target:
line 1 &&\
line 2 &&\
line3
And forget eval and escaped $$. Those are completely unrelated.
-David Boyce
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