[fpc-pascal] linux: should we hard-code versioned or unversioned shared libraries in our apps?

Jorge Aldo G. de F. Junior jagfj80 at gmail.com
Wed Aug 15 13:10:34 CEST 2012

But creating correct symlinks IS one of the tasks of a system
administrator... His up to know the distro he is using and the
software he wants to install.

I bet a "in the field" sysadmin will be much more flexible than a
hardcoded implementation that would need to take zillions of obscure
distros in consideration from the limited perspective of compile

2012/8/15 Graeme Geldenhuys <graemeg.lists at gmail.com>:
> Hi,
> This issue has come up before in a fcl-db discussion regarding the
> Firebird Database, where the libfbclient.so was missing from many
> Linux distros (eg: Ubuntu 10.04), but a libfbclient.so.2.0 was
> available instead. FCL-DB only checks for the unversioned shared
> libraries, thus your application will probably not run out of the box.
> I've stumbled across this problem again today with OpenSUSE 12.1 and
> Synapse where I send emails from inside my applications via a secure
> SMTP connection. The Synapse library is looking for libssl.so, but by
> default OpenSUSE only has libssl.so.1.0.0.
> In both these cases, I manually created unversioned symlinks to those
> libraries, and that got my applications working again. This is not
> ideal, but I don't know how else to handle this.
> Does any body know what is the "most correct" way of handling this? Am
> I supposed to modify my copies of fcl-db and synapse to look for
> specific versions of these shared libraries, or should I somehow add
> a function in my application installation that checks in unversioned
> shared libraries exist, and if not, try and create those (which would
> require root access - and might cause problems an client installs).
> Anybody know of any Linux documentation URL that explain when
> unversioned shared libraries are used and when not, and how
> applications are supposed to handle this?
> --
> Regards,
>   - Graeme -
> _______________________________________________
> fpGUI - a cross-platform Free Pascal GUI toolkit
> http://fpgui.sourceforge.net
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