I found a usable workaround, but am open to other suggestions! The project file Libs.pro builds the three subprojects, one per library. I just wrapped everything in a test for debug: CONFIG(release,debug|release) { TEMPLATE = subdirs PROJECT_DIR = $$clean_path($${top_srcdir}/../) THIRD_DIR = $${PROJECT_DIR}/3rd_party SUBDIRS = \ $${THIRD_DIR}/A/A_lib.pro \ $${THIRD_DIR}/B/B_lib.pro \ $${THIRD_DIR}/C/C_lib.pro } else { error("Only release builds are allowed for these libraries! Please close Qt Creator, delete the 'Libs.pro.user' file and check your kit selection carefully.") } Works for me.

Everyone who is trying to cross-compile Qt for Orange Pi 3B can follow this tutorial: https://github.com/vverenich/CrossCompileQtForOpi

In QT Design Studio, Tab Buttons are mostly for navigation within the UI, but each tab doesn’t automatically hide other content. Usually, a StackView or Loader is needed to switch visible content depending on the active tab.

@IamSumit can you reproduce the issue and share the Support Information logs. Please refer to the following Knowledge Base Article regarding how to obtain the Support Information is https://qatools.knowledgebase.qt.io/misc/collecting-support-info/collecting-support-information-linux-mac-windows/

I am looking for a teammate for this competition, an English-speaking person preferred living in Germany.

I think it's worth asking on the bug report system to see whether they are too specific.

Le [=] n'étant pas nécessaire ici vu qu'il n'y a rien à capturer dans la lambda. connect(obj1, &MyObject::mySignal , this, [](int arg1){ qDebug() << arg1; });

Hi, I think you can use https://forum.qt.io/category/5/qt-io-webservices category for this type of question (moved there by the way). Are these in your "unread" section ? Are they marked as you following them ?