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From: Pascal Obry <pascal@obry.net>
Newsgroups: comp.lang.ada
Subject: Re: Specifying a target in a GPRBuild project file?
Date: Fri, 26 Apr 2013 18:09:37 +0200
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Date: 2013-04-26T18:09:37+02:00
List-Id: <comp.lang.ada>

Le 25/04/2013 21:02, Dmitry A. Kazakov a �crit :
> For this purpose I am using a scenario variable that controls Compiler,
> Linker etc packages. It also manipulates Source_Dirs because different
> targets have some source files different (I don't want to use
> preprocessor).

No scenario variable won't help calling the right tool chain. For
example if you compile a Win32 version of a project from Linux the
proper winres tool will be called:

   $ gprbuild --target=i686-pc-mingw32 prj.gpr

And if one of the language is winres then at some point a call to:

   $ i686-pc-mingw32-winres ...

will be made.

There is no way to achieve that with scenario variables which are useful
to select proper sources and naming scheme. It is also used to pass the
proper libraries. In fact most of the time I'm using:

   $ gprbuild --target=i686-pc-mingw32 -XTARGET=Windows prj.gpr

That is, I teach gprbuild about the cross environment using the proper
triplet name and the project file circuitry about the variant I'm
building. Most of the time the TARGET project variable is UNIX, Darwin
or Windows.

Pascal.

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