[fpc-pascal] Defining sonames?

[Martin Schreiber]

On Thursday 17 August 2017 17:31:46 Sven Barth via fpc-pascal wrote:
> Am 17.08.2017 15:49 schrieb "Graeme Geldenhuys" <
>
> mailinglists at geldenhuys.co.uk>:
> > On 2017-08-16 18:14, Sven Barth via fpc-pascal wrote:
> >> As you can see the program will work correctly as long as the
> >> libX11.so.6 file exists (even though that is a symlink itself, but the
> >> X11 project guarantees that different libX11.so.6.x.y are compatible to
> >> eachother), because the linker picks the SONAME that is set inside the
> >> binary. And the libX11.so.6 symlink is part of the non-devel package.
> >
> > Sven, now here is an interesting problem regarding the way FPC (or Object
>
> Pascal in general) works with C based libraries. Martin pointed this out in
> another mailing list, and he gave me permission to forward it here. What is
> your answer or recommendation to this problem?
>
> Write in your application's readme which versions it requires. It might be
> true that the devel packages contain the C-headers, but there might
> nevertheless be failures if the applications
> is programmed against the interface of the older v1 library (maybe they
> changed the memory management for v2 and the problem will only manifest at
> runtime).
>
Exactly. So why not use the SONAME in the Pascal binding unit instead to use 
the base name as Free Pascal currently does in xlib.pp for example?

Martin