QtJambi build from scratch on windows has missing opengl classes

[wolfseifert]

Describe the bug
When building QtJambi from scratch on windows using MSVC the resulting qtjambi-opengl-6.6.1.jar has missing opengl classes
QOpenGLFunctions_1_0 to QOpenGLFunctions_4_5, only QOpenGLFunctions_ES2 exists. They are not even generated by the generator.

To Reproduce

% ant generate

Have a look at qtjambi/6.6.1/build/generator/cpp/QtJambiOpenGL and qtjambi/6.6.1/build/generator/java/qtjambi.opengl/io/qt/opengl and you see, that only QOpenGLFunctions_ES2 is there.

Expected behavior
qtjambi-opengl-6.6.1.jar should be the same, whether produced on linux, windows or macos.

System (please complete the following information):

• OS: Windows
• Java version: 21
• QtJambi version: 6.6.1
• Qt version: 6.6.1

[omix]

This issue is related to QTBUG-110052.

You need Qt installed with sources. Then QtJambi build system takes the missing headers from there.
They should be copied to 6.6.1/build/generator/missing-headers.

[omix]

Which branch did you use? v6.6.1 or master?

[wolfseifert]

master from 19.12.2023. Should I upgrade?

[wolfseifert]

I have Qt installed with sources.

But my qtjambi/6.6.1/build/generator/missing-headers/QtOpenGL contains only qopenglfunctions_es2.h (like on linux).

[omix]

I can confirm this behavior. Classes for QOpenGLFunctions_X_Y are not generated. This also applies to Qt 6.5.

[wolfseifert]

What makes the QOpenGLFunctions_X_Y header files in qt/6.6.1/msvc2019_64/include/QtOpenGL special is this line:

#if !defined(QT_NO_OPENGL) && !QT_CONFIG(opengles2)

The others do not have this second part in bold.

So I removed it from one of the header files and - voilá - it was generated!

Now we just need a way to make QT_CONFIG(opengles2) false, maybe by -DQT_FEATURE_opengles2=-1 at the right place.

[omix]

QtJambi Generator resolves all QT_CONFIG(feature) macros to true to make sure the Java API contains all possible methods independent from Qt's build configuration.

For opengles2 there was a workaround to accept QOpenGLFunctions_X_Y classes. I don't know why this approach does no longer work. Nevertheless, I replaced the solution by another one.
Try to build with latest commit from master branch.

[wolfseifert]

You committed generator log files into the repository!

Please undo this first, then I will pull and test.

[omix]

Oh my goodness. I wasn't aware.

[omix]

I've undone this. Please try to build Qt.

[wolfseifert]

% ant generate works and all classes are generated. After doing a (successful) full build I will close this issue.

[wolfseifert]

The build on windows was successful and a meld-directory-diff of qtjambi/6.6.1/build/generator with its linux counterpart showed no significant difference. Therefore I am closing this issue.