[Qgis-developer] Library linking problems when release changes - eg. 1.9 --> 1.8

[Andreas Neumann]

Hi Matthias,

Thank you for explaining the reasoning behind this behavior. I can
understand it. The only thing that surprised me is that with older
Ubuntu and/or QGIS version it worked without setting /etc/ld.so.conf or
LD_LIBRARY_PATH - so probably there was some change recently in Ubuntu,
enforcing to actually set /usr/local/lib to be included in the library
path whereas in the past it worked out of the box.

Anyway - it is fine now.

Thanks again to all!

Andreas

Am 26.05.2012 11:30, schrieb Matthias Kuhn:
> Hi,
> 
> To my understanding, the folder /usr/local is to be used for locally
> compiled programs and is therefore not set by default by distributions.
> 
> That qgis is installed into this folder is defined by
> CMAKE_INSTALL_PREFIX which defaults to /usr/local but can easily be
> replaced with /usr so it will work without changing the default path. If
> you are releasing a package, that's the way to go.
> 
> On your development machine you might want to run a stock version of
> qgis and a self-compiled one, so you don't want to install the second
> ont into /usr as well. In this case you can either export
> LD_LIBRARY_PATH (include in .bash_profile to set it automatically) or
> you can add the path it in /etc/ld.so.conf (add a file
> to /etc/ld.so.conf.d if supported by your distro).
> 
> Regards,
> Matthias
> 
> On Fri, 2012-05-25 at 09:38 +0200, Andreas Neumann wrote:
>> Thanks Stefan and Kimaidou
>>
>>  Setting LD_LIBRARY_PATH seems to work. It is strange. I was assuming 
>>  that /usr/local/lib was searched by default anyway. After all this is 
>>  the directory for libraries (next to /usr/lib )
>>
>>  Well - always some mysteries we can't understand ...
>>
>>  Thanks for helping me to solve the problem,
>>  Andreas
>>
>>  On Fri, 25 May 2012 07:30:13 +0000, Ziegler Stefan wrote:
>>> Hi Andi
>>>
>>> I solved it by exporting LD_LIBRARY_PATH:
>>>
>>> export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
>>>
>>> It's a bit strange since I think it used to work without this....
>>>
>>> Regards
>>> Stefan
>>>
>>>> -----Ursprüngliche Nachricht-----
>>>> Von: qgis-developer-bounces at lists.osgeo.org [mailto:qgis-developer-
>>>> bounces at lists.osgeo.org] Im Auftrag von Andreas Neumann
>>>> Gesendet: Freitag, 25. Mai 2012 09:25
>>>> An: qgis-developer
>>>> Betreff: [Qgis-developer] Library linking problems when release 
>>>> changes - eg. 1.9 -->
>>>> 1.8
>>>>
>>>>  Hi,
>>>>
>>>>  Whenever there is a change in the major version of QGIS, e.g. 1.7 
>>>> to
>>>>  1.9 and most recently the switch back from 1.9 to 1.8 I am running 
>>>> into  problems.
>>>>
>>>>  The compile runs fine but when I try to start it I get this 
>>>> message:
>>>>  error while loading shared libraries: libqgis_core.so.1.8.0: cannot 
>>>> open shared object
>>>> file: No such file or directory
>>>>
>>>>
>>>>  But the libqgis_core.so.1.8.0 is present in /usr/local/lib
>>>>
>>>>  I removed the build directory and ran ccmake .. and cmake .. again, 
>>>> but
>>>>  it doesn't solve this problem that it can't find the library that
>>>>  obviously is present and recent on my machine.
>>>>
>>>>  I would very much appreciate if someone could help me out here.
>>>>
>>>>  Thanks a lot,
>>>>  Andreas
>>>>
>>>> --
>>>>  --
>>>>  Andreas Neumann
>>>>  Böschacherstrasse 10A
>>>>  8624 Grüt (Gossau ZH)
>>>>  Switzerland
>>>> _______________________________________________
>>>> Qgis-developer mailing list
>>>> Qgis-developer at lists.osgeo.org
>>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>>
> 
>