How to debug a Mk-Script?

Ben Woods woodsb02 at
Fri Oct 23 23:36:30 UTC 2015

On Monday, 19 October 2015, Torsten Zuehlsdorff <
mailinglists at> wrote:

> Hello,
> after defining a USES pgsql:9.3+ in an port-update i stumbled over this
> error message:
> the port wants postgresql-client version 9.3 9.4 and you have version 9.4
> installed.
> This seems to be an error in Mk/Uses/ which i found to track down
> (in order to gather some more experience).
> While i have already an idea what the case can be, i just want to add some
> output into the script. How is this possible? Can someone guide me please?
> Thanks,
> Torsten

If you just want to know the value that a variable  is being assigned, you
can run the following command at the console the print it out:

This doesn't let you choose where in the flow of the Makefile is the
variable changing, only once the whole Makefile has been parsed.



From: Benjamin Woods
woodsb02 at

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