How to enable pdf/pdfwidgets modules when building qt-everywhere 5.15.11?

oblivioncth

I haven't used the qtwebengine addon before but I know that including it in a build is as simple as not specifying -skip-webengine.

What I'd like to do though is build a full Qt package from source that includes the pdf and pdfwidgets modules so that they can be linked to by simply specifying

QT += pdf pdfwidgets

in a given project.

I see instructions for building them specifically out of the qtwebengine submodule with qmake here: https://wiki.qt.io/QtPDF_Build_Instructions

but I was hoping there is a way to include them in a full build of Qt without having to build them separately and then add them in; however, I see that qmake in that example prints configuration status sections specific to Qt Pdf that do not appear when using configure.bat in the full package, i.e.

Qt PDF:
 Support V8 ............................. no
 Support XFA ............................ no
<...>

Qt PDF Widgets:
 Support Qt PDF Widgets ................. yes

and simply using "-webengine-printing-and-pdf" doesn't seem to cut it.

Are the qtwebengine sources provided in the qt-everywhere packages somehow cutdown or different? Or is there a way I can build Qt PDF with that package and configure things like V8 XFA support?

If I do have to build qtwebengine separately using the method in the Wiki above, can I literally just merge the output web engine binaries into my overall Qt binaries for a complete package afterwards?

oblivioncth

Ok, looking into the source tree it seems that at least 5.15.11 doesn't include the pdf sub modules within qtwebengine, perhaps because its a LTS branch.

I'll try this out with 5.15.2 and report back.

EDIT:
Yea, my bad with this one. Make sure the sources your building from have "qtwebengine\src\pdf" and "qtwebengine\src\pdfwidgets" and then for the call to configure.bat specify:

-no-build-qtwebengine-core

if you don't need the rest of Web Engine, and

--feature-pdf-v8

if you need V8 and XFA support (it turns on both).

If you want to remove some parts of XFA, in addition to the above use (for example to disable TIFF XFA support):

--no-feature-pdf-xfa-tiff

Had to find the configure parameters in this commit: https://codereview.qt.nokia.com/c/qt/qtwebengine/+/271551/11

:)