Why is unavailable directory included?

[pjljvandelaar]

Dear Developers,

When I use aunit.gpr I get two warnings:

aunit.gpr:18:24: warning: library directory "C:\path\to\aunit\lib\aunit\native-full" does not exist
aunit.gpr:22:23: warning: object directory "../aunit-obj/native-full" not found

This question is about the first warning: why is a directory included that doesn't exists?
In other words, this statement has no effects since no additional code will ever be included.

Greetings,
Pierre