[QGIS-Developer] Build issue and SIP_CONCAT_PARTS

[Julien Cabieces]

Hy Nyall,

Yes, I am already rebased on master. And I saw you change it to 13, so I
try to increase it to 14... and it works for core but not analysis.

For now, I'm gonna stick with a concat value of 1, and when I'll be
ready to push, I'll search for a value which works.

Thanks for your response.

Kind regards,
Julien

> On Wed, 26 May 2021 at 23:49, Julien Cabieces
> <julien.cabieces at oslandia.com> wrote:
>>
>>
>> Hi devs,
>>
>> I'm working on a new QGIS feature and wanted to add a new API in core module. I get a strange error when building, on a class not related to what I am adding.
>>
>> /home/julien/work/QGIS/build_debug/python/core/sip_corepart11.cpp:272:67: error: no type named 'QgsOptionalQgsExpressionBase' in the global namespace; did you mean 'QgsOptionalExpression'?
>>      ::QgsOptionalQgsExpressionBase *sipCpp = reinterpret_cast< ::QgsOptionalQgsExpressionBase *>(sipGetCppPtr((sipSimpleWrapper *)sipSelf,sipType_QgsOptionalQgsExpressionBase));
>>
>> It said that QgsOptionalExpressionBase is not defined in
>> sip_corepart_11.cpp, but the typedef is actually in sip_corepart_10.cpp,
>> at the end of the file.
>
> Are you based on a recent master branch? I had to bump the concat
> parts to 13 recently to avoid this exact issue. Perhaps if you rebase
> it will be fixed already.
>

>> From what I understand, CMakeList variable SIP_CONCAT_PARTS allows to
>> split the SIP generated cpp code in several module, but in this case it
>> looks like split happens on a bad location (typedef on one side, part of
>> the code on the other side).
>
> Yeah, it's sip being fragile. We've hit this many times in past, and
> the solution each time is to increase the number of parts by 1.
>
>>
>> If I set SIP_CONCAT_PARTS to 1, it works.
>>
>> Has anyone already facing this kind of issue? Is there some sort of instruction that I should be aware of to solve this?
>>
>> I'm on master, Debian Bullseye, SIP 4.19.25
>>
>> Kind regards,
>> Julien
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