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
	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!aioe.org!.POSTED!not-for-mail
From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Example Ada calling Gnu Scientific Library (GSL)
Date: Tue, 11 Apr 2017 21:46:31 +0200
Organization: Aioe.org NNTP Server
Message-ID: <ocjbql$10al$1@gioia.aioe.org>
References: <2b035819-e55e-4805-9ff1-a2cec09f13e0@googlegroups.com>
 <ek15faF6958U1@mid.individual.net> <obh45r$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>
 <el4i7pF5qreU1@mid.individual.net> <lyd1cibx6t.fsf@pushface.org>
NNTP-Posting-Host: BYuA7L7MRjuLLjcoGHOBxw.user.gioia.aioe.org
Mime-Version: 1.0
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
X-Complaints-To: abuse@aioe.org
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101
 Thunderbird/45.8.0
X-Notice: Filtered by postfilter v. 0.8.2
Xref: news.eternal-september.org comp.lang.ada:46575
Date: 2017-04-11T21:46:31+02:00
List-Id: <comp.lang.ada>

On 2017-04-11 20:45, Simon Wright wrote:
> hreba <f_hreba@yahoo.com.br> writes:
>
>> FINALLY!
>>
>> I had to add "-L/usr/lib"!. This provoked a series of other link
>> errors showing that "-lgslcblas" is needed too.
> [...]
>> Thanks to all for your help, and specially to Simon for his patience.
>
> You're welcome! Glad it's come good.
>
> [to be ignored in the interests of getting on with the job...] I still
> think the required libraries could be specified in gsl_raw. And
> shouldn't /usr/lib be the default, not needing to be specified?

No, under Debian it is actually

    /usr/lib/${DEB_HOST_MULTIARCH}

Under Fedora there is a predefined project Directories which must be 
with-ed and then it is simply

    Directories.Libdir

This is why having a project for external library might work better than 
using direct linker switches.

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