Error while making example fille

ferocito

Hey,
I need to use Qt for a school project, so I downloaded the 6.4.2 version and tried to build the example project the teacher gave us, but I struggled with this error :

./glwidget.h:3:10: fatal error: 'QOpenGLWidget' file not found

Note that the error is related to a

#include  <QOpenGLWidget>

in a .h file of the project.

I succeed to resolve this error by adding

INCLUDEPATH += /path/to/header/file

to the .pro file, but another error came up :

ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1

I tried to add this (with ChatGPT help) on the .pro file :

QMAKE_MACOSX_DEPLOYMENT_TARGET = 12.5
QMAKE_APPLE_DEVICE_ARCHS = arm64
LIBS += -framework QtWidgets -framework QtOpenGL

but it didn't change anything...

When changing arm64 to x86_64, same error :

ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1

In my despair, I tried to build one of the examples the 6.4.2 Qt version provides :

cd /path/to/Qt/examples/6.4.2/widgets/tools/plugandpaint/app
qmake
make -config release

And as i was expecting, another error :

ld: library not found for -lpnp_basictools
clang: error: linker command failed with exit code 1

I have

QT += openglwidgets

in my .pro file, so the problem is not related to this.

After hours spent on ChatGPT and hours trying to explain my problem to the course assistants, this forum is my last hope before resetting my Mac.

If this can help, I'm on a M2 Macbook Air, version 12.5.

Thank you if you made it this far, hope someone will be able to help me.

jsulm

@ferocito Please don't double post!
You already asked exact same question here: https://forum.qt.io/topic/143314/error-while-making-example-file?_=1677748372737