QGIS 3.10.6 does not build with GCC 10 and qt 5.15

[buzo-ffm]

Describe the bug

QGIS 3.10.6 does not build with GCC 10 and qt 5.15. See attached output of make -k (second try).

How to Reproduce
Build with gcc 10.

QGIS and OS versions
QGIS 3.10.6 on Arch Linux (rolling release)

Additional context

I am trying to build this package for Arch Linux.

[buzo-ffm]

make.log.gz

[pblottiere]

For now I tried to compile QGIS master with GCC 10 and qt 5.15 and I have some errors to fix:

[ 79%] Built target translations
[ 79%] Generating gui/sip_guipart0.cpp, gui/sip_guipart1.cpp, gui/sip_guipart2.cpp, gui/sip_guipart3.cpp, gui/sip_guipart4.cpp, gui/sip_guipart5.cpp

sip: core/conversions.sip:1440: %MappedType template for this type has already been defined
make[2]: *** [python/CMakeFiles/python_module_qgis__gui_autogen.dir/build.make:1068: python/gui/sip_guipart0.cpp] Error 1
make[2]: *** Deleting file 'python/gui/sip_guipart0.cpp'
make[2]: Target 'python/CMakeFiles/python_module_qgis__gui_autogen.dir/build' not remade because of errors.
make[1]: *** [CMakeFiles/Makefile2:7364: python/CMakeFiles/python_module_qgis__gui_autogen.dir/all] Error 2
[ 79%] Generating analysis/sip_analysispart0.cpp, analysis/sip_analysispart1.cpp, analysis/sip_analysispart2.cpp, analysis/sip_analysispart3.cpp, analysis/sip_analysispart4.cpp, analysis/sip_analysispart5.cpp

sip: core/conversions.sip:1440: %MappedType template for this type has already been defined
make[2]: *** [python/CMakeFiles/python_module_qgis__analysis_autogen.dir/build.make:730: python/analysis/sip_analysispart0.cpp] Error 1
make[2]: *** Deleting file 'python/analysis/sip_analysispart0.cpp'
make[2]: Target 'python/CMakeFiles/python_module_qgis__analysis_autogen.dir/build' not remade because of errors.
make[1]: *** [CMakeFiles/Makefile2:7336: python/CMakeFiles/python_module_qgis__analysis_autogen.dir/all] Error 2
[ 79%] Generating core/sip_corepart0.cpp, core/sip_corepart1.cpp, core/sip_corepart2.cpp, core/sip_corepart3.cpp, core/sip_corepart4.cpp, core/sip_corepart5.cpp

sip: /home/pblottiere/devel/qgis/qgis_pbl_fix_compil_arch/build/python/core/conversions.sip:1440: %MappedType template for this type has already been defined
make[2]: *** [python/CMakeFiles/python_module_qgis__core_autogen.dir/build.make:676: python/core/sip_corepart0.cpp] Error 1
make[2]: *** Deleting file 'python/core/sip_corepart0.cpp'
make[2]: Target 'python/CMakeFiles/python_module_qgis__core_autogen.dir/build' not remade because of errors.
make[1]: *** [CMakeFiles/Makefile2:7391: python/CMakeFiles/python_module_qgis__core_autogen.dir/all] Error 2
[ 79%] Built target zzz-MetaSearch-48-depend

I'll take a look to QGIS 3.10 after.

[pblottiere]

Master is fixed with #37116. I'm taking a look to 3.10.

[rduivenvoorde]

@pblottiere 3.10 still has this issue. Is it difficult/dangerous to backport this fixes?

[pblottiere]

Hi @rduivenvoorde,

Is it difficult/dangerous to backport this fixes?

I take a look this afternoon.

[pblottiere]

3.10 branch should be fixed with #37250.

[pblottiere]

Backport has been merged, so we can close this issue.

[buzo-ffm]

Still does not build on Arch Linux. See my comment in #37250.