[plug] library version conflicts

[Peter F Bradshaw]

On Fri, 3 Mar 2006, tim wrote:

> Hi all,
>
> As a non programmer I need some advice about installing conflicting
> versions of some libraries.  The box in question has red hat enterprise
> linux which will soon have a support subscription so I don't want to
> change any of the red hat supplied libraries.  The problem comes where I
> am compiling an app which needs later versions of two of the supplied
> libraries.
>
> I have installed them to /usr/local/<libname>/  What is the best way to
> ensure that the app I am compiling uses the new version of the lib both
> at compile time and run time?

You do not say what the "build system" for the app is. I'm going to
assume it is autoconf - i.e. you run ./configure ... in the app's
base build dir. In that case you will need to supply the location of the
dependant lib to configure. This will probably be done by something like
"./configure --<libname>-includes=/usr/local/<libname> --<libname>-libraries=/usr/local/<libname>
How this is done specifically for you app is setup by the person that
wrote the autoconf scripts.  See that package install documentation and
try ./configure --help for information specific to your app.

If you want only the app to use the new libs at run time then the
easiest way is to run it from a shell script which sets up the env.
specifically for the app. The script may look something like:

#!/bin/bash

export LD_LIBRARY_PATH=/usr/local/<libname>/lib:$LD_LIBRARY_PATH
/usr/local/<app>/bin/<app> ....

Then put this script in you PATH or run it explicitly either from
the command line or from some GUI session object (like a menu or
launcher).

As you can see the exact answer to you questions depend on the way
your app has been setup by the package authors. So you need to refer
to this package's documentation.

>
> Thanks,
> Tim Bowden
>
>

Cheers

-- 
Peter F Bradshaw, http://www.exadios.com, ICQ 75431157 (exadios).
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