On Thursday 17 August 2017 17:31:46 Sven Barth via fpc-pascal wrote: > Am 17.08.2017 15:49 schrieb "Graeme Geldenhuys" < > > mailingli...@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?
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