[mapserver-dev] Possible bug to be reported ?

[Seth G]

Hi Bruno,

I recall running into this when testing the SWIG 4 beta and Python MapScript. See SWIG mailing list post at https://sourceforge.net/p/swig/mailman/message/36649157/ - it has the same errors you have. 
I reverted to SWIG 3.0.12 to get it to build. If you get any further debugging this please post back. 
Regards,

Seth

--
web:http://geographika.co.uk
twitter: @geographika

On Thu, Jan 23, 2020, at 9:22 AM, Bruno Friedmann wrote:
> Hi all, I would like to have your thought about a problem.
> 
> During the building process of mapserver7 on openSUSE (especially our rolling 
> flavor Tumbleweed). 
> It use for the build actually gcc9 9.2.1 and swig 4.0.1
> 
> I only build now only for python3 (version 3.7.3) the mapscript part
> 
> I've got this type of error
> 
> [  151s] make -f 
> mapscript/python/CMakeFiles/_pythonmapscript.dir/build.make 
> mapscript/python/CMakeFiles/_pythonmapscript.dir/build
> [  151s] make[2]: Entering directory '/home/abuild/rpmbuild/BUILD/
> mapserver-7.4.3/build'
> [  151s] [ 94%] Building C object mapscript/python/CMakeFiles/
> _pythonmapscript.dir/CMakeFiles/_pythonmapscript.dir/mapscriptPYTHON_wrap.c.o
> [  151s] cd 
> /home/abuild/rpmbuild/BUILD/mapserver-7.4.3/build/mapscript/python 
> && /usr/bin/cc -D_pythonmapscript_EXPORTS -I/home/abuild/rpmbuild/BUILD/
> mapserver-7.4.3/build 
> -I/home/abuild/rpmbuild/BUILD/mapserver-7.4.3/renderec
> [  151s] 
> /home/abuild/rpmbuild/BUILD/mapserver-7.4.3/build/mapscript/python/
> CMakeFiles/_pythonmapscript.dir/mapscriptPYTHON_wrap.c: In function 
> 'imageObj_write':
> [  151s] 
> /home/abuild/rpmbuild/BUILD/mapserver-7.4.3/build/mapscript/python/
> CMakeFiles/_pythonmapscript.dir/mapscriptPYTHON_wrap.c:4020:28: 
> warning: 
> unused variable 'renderer' [-Wunused-variable]
> [  151s]  4020 |         rendererVTableObj *renderer = NULL;
> [  151s]       |                            ^~~~~~~~
> [  151s] 
> /home/abuild/rpmbuild/BUILD/mapserver-7.4.3/build/mapscript/python/
> CMakeFiles/_pythonmapscript.dir/mapscriptPYTHON_wrap.c: In function 
> '_wrap_CompositingFilter_filter_set':
> [  151s] 
> /home/abuild/rpmbuild/BUILD/mapserver-7.4.3/build/mapscript/python/
> CMakeFiles/_pythonmapscript.dir/mapscriptPYTHON_wrap.c:6617:66: error: 
> expected expression before ',' token
> [  151s]  6617 |   if (!PyArg_ParseTuple(args, 
> "Oz:CompositingFilter_filter_set", , &arg2)) SWIG_fail;
> [  151s]       |                                                        
>           
> ^
> [  151s] 
> /home/abuild/rpmbuild/BUILD/mapserver-7.4.3/build/mapscript/python/
> CMakeFiles/_pythonmapscript.dir/mapscriptPYTHON_wrap.c: In function 
> '_wrap_clusterObj_region_set':
> [  151s] 
> /home/abuild/rpmbuild/BUILD/mapserver-7.4.3/build/mapscript/python/
> CMakeFiles/_pythonmapscript.dir/mapscriptPYTHON_wrap.c:7391:59: error: 
> expected expression before ',' token
> [  151s]  7391 |   if (!PyArg_ParseTuple(args, 
> "Oz:clusterObj_region_set", , 
> &arg2)) SWIG_fail;
> [  151s]       |                                                        
>    ^
> 
> 
> So my questions are, is somebody else have seen this (arch, fedora exp...) ?
> What is the root cause (will serve as subject for the issue).
> Is there a simple stupid fix (then I could try to write it, test and PR 
> afterwards)
> 
> 
> Thanks for any pointer
> -- 
> 
> Bruno Friedmann 
>  
>  GPG KEY : D5C9B751C4653227
>  irc: tigerfoot
> 
> 
> 
> 
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