[Qgis-developer] SQL Anywhere Library conflict

[Dave.DeHaan at sybase.com]

Hi Tim,

When I installed my linux QGIS build environment it was on a machine with
SA12 already installed, so when I encountered these build errors I thought
it was a problem with the GDAL configuration and didn't recognize it was a
library conflict.  My solution at the time was to append the full path to
libodbcinst (/usr/lib/libodbcinst.so) to the CMake variable GDAL_LIBRARY.

However, a better solution is to delete libodbcinst.so and libodbcinst.so.1
from the lib{32,64} directory your SQLA installation.  These are simply
soft-links to our implementation of the ODBC ini parser, provided as a
convenience to SQLA app developers.  Deleting these soft-links should not
cause any problems.

Best regards,
Dave

----
David E. DeHaan
Query Processing team
Sybase iAnywhere


                                                                                                             
  From:       Tim Sutton <lists at linfiniti.com>                                                               
                                                                                                             
  To:         qgis-developer <qgis-developer at lists.osgeo.org>                                                
                                                                                                             
  Date:       12/28/2010 04:49 PM                                                                            
                                                                                                             
  Subject:    [Qgis-developer] SQL Anywhere Library conflict                                                 
                                                                                                             
  Sent by:    <qgis-developer-bounces at lists.osgeo.org>                                                       
                                                                                                             





Hi Dave (and others interested in SQL Anywhere)

I cam across a problem with linking QGIS libs where I would get the
following error messages:


Linking CXX executable qgis
/usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../../lib/libgdal1.7.0.so:
undefined reference to `SQLInstallDriverEx'
/usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../../lib/libgdal1.7.0.so:
undefined reference to `SQLRemoveDriver'
/usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../../lib/libgdal1.7.0.so:
undefined reference to `SQLInstallerError'
collect2: ld returned 1 exit status
make[2]: *** [src/app/qgis] Error 1
make[1]: *** [src/app/CMakeFiles/qgis.dir/all] Error 2
make: *** [all] Error 2

After quite a bit of poking around I realised that there was probably
a conflict introduced by my recent SQLAnywhere install.

I commented out the line I added to my ~/.bashrc for SQL Anywhere:

# Added by Tim for sql anywhere support
#source /opt/sqlanywhere12/bin64/sa_config.sh

And then started a new shell, after which the QGIS libs linked
properly. I believe this is due the the libodbc shipped with SQL
Anywhere conflicting with my system lib.

So with that background, is there any elegant way to deal with this? I
guess the stock answer will be that typical users wont be compiling
QGIS so probably won't run into this - though I don't know if there
will be runtime issues introduced by this. Any thoughts? How do you
have your compilation environment set up?

Regards


--
Tim Sutton - QGIS Project Steering Committee Member (Release  Manager)
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