[fpc-pascal] libc error on older Linux

[Michael Van Canneyt]

On Wed, 3 Jun 2026, Rainer Stratmann via fpc-pascal wrote:

>>> Compiled on Debian 13 in a KDE environment, runs fine.
>>> Debian 13 (without KDE) runs fine
>>> Debian 11 (without KDE) does not work as already described.
>>> Debian 12 (without KDE) works.
>>>
>>> Can I put an older libc.so.6 somewhere and say fpc that it should use
>>> that
>>> library for compiling?
>>
>> The question is - do you really need to use libc at all then?
>>
>> Tomas
>
> I made a little writeln( 'Hello' ); Testprogram with all units from the big
> Program.
>
> The unit dynlibs causes the issue.
>
> If I compile it without dynlibs then it runs.

That's not a surprise.

Using dynlibs links your program to the C library, which is needed to load other C
dynamic libraries.

So as soon as you use it, your program depends on the C library, and you
need to deal with C library versions.

Michael.