Protected Type compiler complaint

[NiGHTS <nights@unku.us>]

Subject: Protected Type compiler complaint
Platform: Linux (Kubuntu 14.04 32-bit)
Dev: GPS 5.0-16, GNAT 4.6


I am new to Ada and GPS so forgive me if my question seems silly. I have tried searching for the answer from various places for hours but for the life of me I can't even find a hint.

I have a very simple project in GPS with a "main" package and a "test" protected type. They occupy files with the same name and adb/ads extensions.

After creating my test files I went to the Menu "Project" -> "Edit Project Properties" -> "Source Files" tab. Then I added the test.adb & test.ads files where my protected type declarations are located. 

When I compile it complains that "protected declaration cannot be used as compilation unit" on line 1 of test.ads. So I remove those files from the project source files options menu. Then when I compile again it complains about "test.ads not found" on line 3 of main.adb.

Here is a summarized view of what my test.ads looks like:

   protected type Test is
       procedure DoSomething;
   end Test;

And here is a summarized view of what my main.adb looks like:

   with Test; use Test;

   procedure main is
   begin
       Test.DoSomething;
   end;

Any ideas what I might be doing wrong?


Thank you in advance for your help!