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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Upgrade to gnat 2015 now project not linking
Date: Wed, 30 Sep 2015 20:15:01 +0100
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Date: 2015-09-30T20:15:01+01:00
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Lucas Redding <lucas.redding@gmail.com> writes:

> Hold fire!
>
> I was too quick to come to conclusion. -M does not generate a map file.
>
> I need to look into how to generate a map file in 2015.
>
> I'll be back.

Gprbuild can do this.

You should be able to say, in package Builder, something like

   package Builder is
      for Default_Switches ("ada") use
        ("--create-map-file=" & project'Project_Dir & project'Name & ".map");
   end Builder;

(that's one of mine; it assumes there's only one main program, named
after the project, and works round the problem that the link is done in
the build directory).

assuming that the configuration is set up to know how to specify a map
file; if not, you could try (for GNU ld)

   package Linker is
      for Map_File_Option use "-Wl,-Map,";
   end Linker;

It occurs to me one could try to combine these:

   package Linker is
      for Map_File_Option use "-Wl,-Map,project'Project_Dir";
   end Linker;

and

   package Builder is
      for Default_Switches ("ada") use ("--create-map-file");
   end Builder;

If this works, you could omit (this part of) package Builder and just
use --create-map-file on the command line.