[Development] How to build Qt5's docs?

[Loaden]

I want to build Qt5's docs (qch), but failing always.

make docs >>doc.log 2>&1
>

Error Message:

> threed.pro -o Makefile ) && make -f Makefile docs
> make[3]: Entering directory
> `/home/loaden/qpSOFT/Projects/BuildQt5-x64/qt3d/src/threed'
> /home/loaden/qpSOFT/Projects/BuildQt5-x64/qtbase/bin/qdoc -installdir
> /home/loaden/qpSOFT/Projects/BuildQt5-x64/qtbase/doc
> /home/loaden/qpSOFT/Projects/Qt5/qt3d/src/threed/doc/qt3d.qdocconf
> /home/loaden/qpSOFT/Projects/Qt5/qt3d/src/threed/doc/qt3d.qdocconf:1:
> error: Cannot open file
> '/home/loaden/qpSOFT/Projects/Qt5/qt3d/src/threed/doc/../../../doc/global/qt-html-templates-offline.qdocconf':
> No such file or directory
> Cannot open file
> '/home/loaden/qpSOFT/Projects/Qt5/qt3d/src/threed/doc/../../../doc/global/qt-html-templates-offline.qdocconf':
> No such file or directory
>
> Aborting
> make[3]: *** [docs] Error 1
> make[3]: Leaving directory
> `/home/loaden/qpSOFT/Projects/BuildQt5-x64/qt3d/src/threed'
> make[2]: *** [sub-threed-docs_ordered] Error 2
> make[2]: Leaving directory
> `/home/loaden/qpSOFT/Projects/BuildQt5-x64/qt3d/src'
> make[1]: *** [sub-src-docs] Error 2
> make[1]: Leaving directory `/home/loaden/qpSOFT/Projects/BuildQt5-x64/qt3d'
> make: *** [module-qt3d-docs] Error 2


Why?

-- 
Best Regards
Yuchen
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