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From: sjw <simon.j.wright@mac.com>
Newsgroups: comp.lang.ada
Subject: Re: architecture-independent GNAT project files?
Date: Tue, 28 Apr 2009 13:56:24 -0700 (PDT)
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Date: 2009-04-28T13:56:24-07:00
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On Apr 28, 8:24=A0am, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
wrote:

> Hmm, I see no obvious way to do it. In my case there are several GNAT
> compilers installed. The project variable Platform chooses the compiler a=
s
> well. For example, I have:
>
> =A0 =A0package Ide is
> =A0 =A0 =A0 case Platform is
> =A0 =A0 =A0 =A0 =A0when "x86_Windows" =3D>
> =A0 =A0 =A0 =A0 =A0 =A0 for Gnatlist use "gnatls";
> =A0 =A0 =A0 =A0 =A0 =A0 for Gnat use "gnat";
> =A0 =A0 =A0 =A0 =A0 =A0 for Compiler_Command ("ada") use "gnatmake";
> =A0 =A0 =A0 =A0 =A0 =A0 for Debugger_Command use "gdb";
> =A0 =A0 =A0 =A0 =A0when "x86_VxWorks" =3D>
> =A0 =A0 =A0 =A0 =A0 =A0 for Gnatlist use "i586-wrs-vxworks-gnatls";
> =A0 =A0 =A0 =A0 =A0 =A0 for Gnat use "i586-wrs-vxworks-gnat";
> =A0 =A0 =A0 =A0 =A0 =A0 for Compiler_Command ("ada") use "i586-wrs-vxwork=
s-gnatmake";
> =A0 =A0 =A0 =A0 =A0 =A0 for Debugger_Command use "i586-wrs-vxworks6-gdb";
> =A0 =A0 =A0 end case;
> =A0 =A0end Ide;
>
> This changes gnatlist, gnat, gnatmake, everything...

If you say

  $ gnatmake -Pdmitry.gpr -XPlatform=3Dx86_VxWorks

does it swap then? When we wrote our Project files we weren't aware of
Compiler_Command, in fact it may not even have been available, so we
have to name the compiler as well as setting the variables:

  $ i586-wrs-vxworks6-gnatmake -Pdmitry.gpr -XPlatform=3Dx86_VxWorks

Of course, once the makefiles are set up it doesn't make a heap of
difference.