How to change default C++ version for Creator projects

JonB

Was an idle curiosity, now irritating me that I can't spot answer.

Using Qt 5.15, Qt Creator 6, as supplied for Ubuntu 22.04.

I use qmake. When Creator creates a new project for me the project.pro contains CONFIG += c++11.

Where does that C++ version choice for new projects come from? Googling qt change default c++ version has not showed me where it's stored or how to alter it. Don't know whether Creator might put this in or have a setting (can't see one, tried looking all over) or whether it's some default from qmake?

My gcc version is 11.4. I believe I can go to c++14 or c++17 fine. I create lots of tiny test projects frequently, I don't want to have to think to change the .pro each time. Preferably a solution which is for end-user, I don't want to alter a system-installed Qt file.

jsulm

@JonB You can search for the templates used by QtCreator.
For example I found /usr/share/qtcreator/templates/wizards/projects/consoleapp/file.pro for QtCreator packaged by Ubuntu.
It could also be that QtCreator sets the min C++ version required by the used Qt version to support as many compilers/versions as possible.

JonB

@jsulm said in How to change default C++ version for Creator projects:

For example I found /usr/share/qtcreator/templates/wizards/projects/consoleapp/file.pro for QtCreator packaged by Ubuntu.

Will do. I was hoping not to have to alter a system file, for example maybe Creator initially creates something in ~/whatever where I could find the c++11, but not having much luck. @J-Hilk suggested ~/.config/QtProject ~/.local/share/data/QtProject/qtcreator1, found some files in former, not spotted if that has anything for this issue.

It's kind of strange nobody has ever asked this. Wanting to up the default C++ for projects is not unreasonable.

JonB

@jsulm said in How to change default C++ version for Creator projects:

For example I found /usr/share/qtcreator/templates/wizards/projects/consoleapp/file.pro for QtCreator packaged by Ubuntu.

OK, since that's clearly a literal .pro file and it has hard-coded CONFIG += c++11 console that is clearly the correct answer! I had thought the c++11 would be "generated" from somewhere during project creation, but looks like it was set in whenever Qt was generated/released. Ho hum. Prefer not to alter the system files, will live with having to alter it in generated .pro file. At least I know!