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From: Ludovic Brenta <ludovic@ludovic-brenta.org>
Newsgroups: comp.lang.ada
Subject: Re: how to tell gnatmake to send executables to a different directory
	when compiling multi source?
Date: Tue, 31 Jul 2012 05:33:32 -0700 (PDT)
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Date: 2012-07-31T05:33:32-07:00
List-Id: <comp.lang.ada>

Patrick wrote on comp.lang.ada:
> I was just wondering why GNAT does not use GPR. I spent 30 minutes
> last week sorting files into folders. I don't understand how GNAT
> works but just doing this gave me a rough outline of quite a lot
> of the project. =A0It would help a lot if the project was already
> sorted by it's developers.

Are you talking about the sources of GCC?  They don't use project
files because GCC grew from a C-only compiler to a "compiler
collection" with front-ends, run-time libraries and tools for many
languages besides Ada.  And gnatmake, the tool that understands
project files, is separate from the Ada front-end and from the
libraries.  And gprbuild, the tool that also understands project
files but additionally understands several compilers for other
languages, is not part of GCC.

Also the inertia of GCC's extremely complex build machinery is
huge.  Nobody wants to or has the energy to rewrite 300_000 lines
of configury, auto* and evil recursive makefiles (which are the
result of 3 layers of generators) for no functional benefit and
huge risk of breaking something :/

--
Ludovic Brenta.