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
X-Received: by 2002:a0c:910c:: with SMTP id q12mr9749476qvq.22.1591368730881;
        Fri, 05 Jun 2020 07:52:10 -0700 (PDT)
X-Received: by 2002:a9d:7852:: with SMTP id c18mr7751636otm.82.1591368730579;
 Fri, 05 Jun 2020 07:52:10 -0700 (PDT)
Path: 
 eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!news.gegeweb.eu!gegeweb.org!fdn.fr!proxad.net!feeder1-2.proxad.net!209.85.160.216.MISMATCH!news-out.google.com!nntp.google.com!postnews.google.com!google-groups.googlegroups.com!not-for-mail
Newsgroups: comp.lang.ada
Date: Fri, 5 Jun 2020 07:52:10 -0700 (PDT)
In-Reply-To: <d10989b4-ed2f-47c8-8f95-4d2f0d9cdafdo@googlegroups.com>
Complaints-To: groups-abuse@google.com
Injection-Info: google-groups.googlegroups.com;
 posting-host=2a02:1206:4544:3750:79a1:5f52:fb10:4884;
 posting-account=gRqrnQkAAAAC_02ynnhqGk1VRQlve6ZG
NNTP-Posting-Host: 2a02:1206:4544:3750:79a1:5f52:fb10:4884
References: <d10989b4-ed2f-47c8-8f95-4d2f0d9cdafdo@googlegroups.com>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <12b67609-2acc-4a80-88c0-5567a89667f9o@googlegroups.com>
Subject: Re: generic with function procedure
From: gautier_niouzes@hotmail.com
Injection-Date: Fri, 05 Jun 2020 14:52:10 +0000
Content-Type: text/plain; charset="UTF-8"
Xref: reader01.eternal-september.org comp.lang.ada:58969
Date: 2020-06-05T07:52:10-07:00
List-Id: <comp.lang.ada>

It depends on how you have defined g1 and h1...
You may also want to pass Real as a generic parameter to make your "denm" package work for any precision. Perhaps doing so will solve your problem by the way.
Here is a package from Mathpaqs, as an inspiration.

with Ada.Numerics.Generic_Real_Arrays;

generic
  type Real is digits <>;
  with package Real_Arrays is new Ada.Numerics.Generic_Real_Arrays (Real);
  type Integer_Vector is array (Integer range <>) of Integer;

package Generic_Real_Linear_Equations is

  use Real_Arrays;

  function Linear_Equations ( A : Real_Matrix ;
                              Y : Real_Vector ) return Real_Vector ;
...