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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Problem referencing library file via project file
Newsgroups: comp.lang.ada
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References: <iuydnbpLUswxWSbQnZ2dnUVZ8tydnZ2d@brightview.co.uk>
Date: Sat, 30 Apr 2011 10:34:41 +0200
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Date: 2011-04-30T10:34:40+02:00
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On Sat, 30 Apr 2011 09:15:34 +0100, Robert Matthews wrote:

> I am trying to link the webkit library file with my program.
> One way that works is to use:
> 
> pragma Linker_Options ("-lwebkit-1.0");
> 
> in my source file.
> 
> However I would like to specify this in the program's
> project file. I have tried:
> 
> package Linker is
>    for Default_Switches ("ada") use ("-lwebkit-1.0");
> end Linker;
> 
> but this seems to be ignored - I just get undefined
> reference messages from gnatlink. Please help!

I would recommend always refer external non-Ada libraries as proper library
projects rather than a bunch of linker options.

In your case it could be:

webkit.gpr:
---------------------------------------------------
project WebKit is
   for Externally_Built use "true";
   for Source_Files use ();
   for Library_Dir use "/usr/lib"; -- Or whatever location it has
   for Library_Name use "webkit-1.0";
   for Library_Kind use "dynamic";
end WebKit;
-------------------------------------------------
and then in your project you just "with" it:

with "webkit.gpr";

Gprbuild and gprmake would do the rest.

P.S. I would make this packaging policy for all Ada distributions.

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