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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: GNATCOLL 2016 installation problem.
Date: Sun, 6 May 2018 19:48:49 +0200
Organization: Aioe.org NNTP Server
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Date: 2018-05-06T19:48:49+02:00
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On 2018-05-06 17:35, eduardsapotski@gmail.com wrote:
> I need GNATCOLL only to connect to the database PostgreSQL.
> 
> OS - CentOS 6.9
> 
> $> ./configure prefix=/usr/gnat --with-postgresql="/usr/pgsql-10/lib/libpq.a" -without-gtk --without-sqlite --without-python --disable-projects --disable-pygtk
> 
> $> make
> 
> I get errors:
> 
> libgnatcoll_postgres.so: undefined reference to `ldap_get_values_len'
> libgnatcoll_postgres.so: undefined reference to `ldap_result'
> libgnatcoll_postgres.so: undefined reference to `ldap_value_free_len'
> ...
> 
> As I understand these functions are described in the file ldap.h:
> 
> $> find / -name ldap.h
> /usr/lib64/evolution-openldap/include/ldap.h
> /usr/include/ldap.h
> 
> What is the problem?

Apparently you must link against libldap, for whatever reason they use 
it. Pass -lldap to the linker.

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