From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM
	autolearn=unavailable autolearn_force=no version=3.4.4
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!feeder.erje.net!1.eu.feeder.erje.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: hreba <f_hreba@yahoo.com.br>
Newsgroups: comp.lang.ada
Subject: Re: Example Ada calling Gnu Scientific Library (GSL)
Date: Tue, 11 Apr 2017 19:31:38 +0200
Message-ID: <el4i7pF5qreU1@mid.individual.net>
References: <2b035819-e55e-4805-9ff1-a2cec09f13e0@googlegroups.com>
 <ek15faF6958U1@mid.individual.net> <obh45r$p0s$1@franka.jacob-sparre.dk>
 <ekihasFjum4U1@mid.individual.net> <lyefx695sm.fsf@pushface.org>
 <ekl1v6F4hvtU1@mid.individual.net> <lya87u803p.fsf@pushface.org>
 <ekq521F4gc3U1@mid.individual.net> <ly60if8fry.fsf@pushface.org>
 <ekuiclF163U1@mid.individual.net> <lypoglpq3o.fsf@pushface.org>
 <el0vg8Fe614U1@mid.individual.net> <lyh91wp8ru.fsf@pushface.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: individual.net ch1oS07thp1Hfa70TSUctAw4KB5kmUXcMoR3RSvXgJvBUKyOae
Cancel-Lock: sha1:sYOyUWABq0UhPulmKSf0d0wdYq8=
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101
 Thunderbird/45.8.0
In-Reply-To: <lyh91wp8ru.fsf@pushface.org>
Xref: news.eternal-september.org comp.lang.ada:46572
Date: 2017-04-11T19:31:38+02:00
List-Id: <comp.lang.ada>

On 04/10/2017 05:44 PM, Simon Wright wrote:
> Oops, thanks Dmitry: I should have said
>
>  package Linker is
>     for Linker_Options use ("-lgsl");
>  end Linker;
>
> (in your lowest-level GPR, gsl_raw I think?)
>

FINALLY!

I had to add "-L/usr/lib"!. This provoked a series of other link errors 
showing that "-lgslcblas" is needed too. Now for completeness and 
perhaps as help for others, my 3 project files are:

1. Thin binding:

library project GSL_Raw is
    for Source_Dirs use ("src");
    for Library_Dir use "lib";
    for Object_Dir use "obj";
    for Library_Name use "gsl_raw";
    for Library_Kind use "static";
    for Externally_Built use "false";
end GSL_Raw;

2. Thick binding:

with "GSL_Raw/gsl_raw";

library project GSL is
    for Source_Dirs use ("src");
    for Library_Name use "gsl";
    for Library_Dir use "lib";
    for Object_Dir use "obj";
    for Library_Interface use ("gsl");
    for library_kind use "static";
    for externally_built use "false";

    package Compiler is
       for Default_Switches ("Ada") use ("-g", "-gnat05");
    end Compiler;

    package Linker is
       for Linker_Options use ("-L/usr/lib", "-lgslcblas", "-lgsl");
    end Linker;
end GSL;

3. Test program

with "../../gsl.gpr";
with "../../../Gen/gen.gpr";   --<-- a libray I use in my program

project Test_Integration is

    for Source_Dirs use (".");
    for Object_Dir use "../obj";
    for Exec_Dir use ".";
    for Main use ("test_integration.adb");

    package Compiler is
       for Default_Switches ("ada") use ("-g", "-gnat05");
    end Compiler;

end Test_Integration;

Thanks to all for your help, and specially to Simon for his patience.
-- 
Frank Hrebabetzky		+49 / 6355 / 989 5070