[Qgis-developer] Issue with QGIS server on CentOS - self compiled

[Neumann, Andreas]

HI David, 

Thanks - I am aware that there are packages. But there are two main
reasons why I want to self-compile: 

* being able to use certain configuration options or supporting
databases that are not supported by the standard package (such as Oracle
support) 

* being able to test new features from github regularly 

I still haven't fixed the issue with the two incompatible libpng. Seems
to be more a runtime issue with Apache fcgi and LD_LIBRARY_PATH. BTW:
output as JPEG works fine ... 

I will post again if I was able to fix the issue. 

Thanks, 

Andreas 

On 2016-08-11 05:24, Dave Johansen wrote:

> QGIS is packaged in EPEL, so that would be another option.
> https://admin.fedoraproject.org/pkgdb/package/rpms/qgis/ 
> 
> On Wed, Aug 10, 2016 at 10:17 AM, Neumann, Andreas <a.neumann at carto.net> wrote:
> 
>> Hi, 
>> 
>> I self-compiled QGIS Server (on CentOS 7) and it works fine for GetCapabilities and GetProjectSettings commands, but fails for GetMap. 
>> 
>> In the Apache log I get an error: 
>> 
>> libpng warning: Application was compiled with png.h from libpng-1.5.13
>> libpng warning: Application is running with png.c from libpng-1.2.56
>> libpng error: Incompatible libpng version in application and library
>> 
>> I checked libpng and there is "libpng-1.5.13" on my machine in /usr/lib64. Within the gdal source tree (also self-compiled) there is a is a second version of libpng, which seems to match libpng-1.2.56 
>> 
>> Do you have an idea how I can influence the QGIS server fcgi file to pick up libpng-1.5.13 first? 
>> 
>> I tried to set LD_LIBRARY_PATH and set "/usr/lib64" first, so I assumed it picks up the newer version first. But it still fails ... 
>> 
>> Does libgdal.so contain the older version of libpng which conflicts? 
>> 
>> Thanks, 
>> 
>> Andreas
>> 
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