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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: how to tell gnatmake to send executables to a different directory
 when compiling multi source?
Date: Mon, 30 Jul 2012 07:50:00 +0200
Organization: cbb software GmbH
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Date: 2012-07-30T07:50:00+02:00
List-Id: <comp.lang.ada>

On Sun, 29 Jul 2012 22:01:11 -0500, Nasser M. Abbasi wrote:

> Here, people will scream at me for not using GPR for building
> Ada projects.

Not only Ada projects.

If you want to spare -largs stuff in gnatmake, be able to link against
static or dynamic version, you describe the external library (e.g.
liblapack.a, liblapack.so, lapack.lib etc) like:

project lapack is
   for Externally_Built use "true";
   for Source_Files use ();
   for Library_Dir use "/usr/lib/x86_64-linux_gnu";
   for Library_Name use "lapack";
   type Library_Kind_Type is ("static", "relocatable");
   Library_Kind : Library_Kind_Type := external ("Library_Type",
"relocatable");
   for Library_Kind use Library_Kind;
 end lapack;

The project containing the bindings will simply "with" the library projects
blas, lapack etc. GNAT knows naming conventions of the given host and
figures out proper linker options for each scenario.

It is a very useful feature when you have lots of external libraries.
Something like GTK may require dozens of libraries. When you have multiple
targets you change the library project files and leave the binding project
file and any other project files intact.

> I see Make as the lowest common denominator.

Already tried your stuff with nmake?

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de