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From: Stefan Bellon <sbellon@sbellon.de>
Newsgroups: comp.lang.ada
Subject: Re: Undefined reference to glib_E
Date: Mon, 26 Mar 2007 15:14:27 +0200
Organization: Comp.Center (RUS), U of Stuttgart, FRG
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 2007 13:14:04 GMT)
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To: "Alexander Camek" <Alexander.Camek@Elektrobit.com>
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Date: 2007-03-26T15:14:27+02:00
List-Id: <comp.lang.ada>

Alexander Camek wrote:

> with "common";
> with "framework";
> 
> project images is
>  for Library_Name use "images";
>  for Library_Dir  use "lib";
>  for Object_Dir   use "obj";
>  for Library_Kind use "dynamic";
>  for Source_Dirs  use (".", "bind");
>  for Languages    use ("Ada", "C");
>  for Library_Interface use
>   ("base_images", "generic_images", "images");
> 
>  package Linker   renames Common.Linker;
>  package Compiler renames Common.Compiler;
>  package Builder  renames Common.Builder;
>  package Ide      renames Common.Ide;
> 
> end images;
> 
> When I do a static linking, everything works fine, but the dynamic
> linkage has this undefined reference.

You are building a DLL on Windows here. A DLL cannot (unlike a
shared object on UNIX) have unresolved symbols. In the worst case you
need an import library. But in this case, there's another way.

> The common project contains the gtkada project.

Somewhere in your GtkAda project file there should be the Linker
package and the Linker_Options defined. Those are necessary when
building a DLL on Windows. In our project files it looks like this:

with "gtkada";

-- ...

project My_Lib is

   for Library_Name use "My_Lib";
   for Library_Kind use "dynamic";

   -- ...

   case Common.OS is
      when "UNIX" =>
         null;
      when "Windows_NT" =>
         --  On Windows, we need to use GtkAda's Linker_Options to
         --  link DLLs depending upon GtkAda.
         for Library_Options use GtkAda.Linker'Linker_Options;
   end case;

   -- ...

end My_Lib

I hope, this helps.

Greetings,
Stefan

-- 
Stefan Bellon