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From: Greg Moncreaff <moncreg@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Question about GNAT project files.
Date: Sun, 26 Feb 2012 14:18:02 -0800 (PST)
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Date: 2012-02-26T14:18:02-08:00
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On Feb 26, 2:48=A0pm, "Peter C. Chapin" <PCha...@vtc.vsc.edu> wrote:
> I have a library described by a project file, say lib.gpr. I also have a
> test program that exercises the library described by a different project
> file tests.gpr. Finally I have a benchmark program that does speed tests
> of the library described by a project file benchmarks.gpr.
>
> This is fine but it's a pain having three separate projects. Typically
> if I change the library I also want to update the tests and benchmarks.
> I'd like to do all that from a single instance of GPS.
>
> Thought #1: Create an empty "master" project that imports the three
> projects I mentioned above as subprojects. This doesn't work. As soon as
> I try to build something GPS tells me that my project (the master
> project) doesn't have any Ada sources. Perhaps I'm doing it wrong.
>

Look for something called an 'aggregate' project.

http://www.adacore.com/wp-content/files/auto_update/gnat-unw-docs/html/gnat=
_ugn_12.html#SEC152