QtCreator: No valid kits found - c++

Question

Installed just the IDE on Windows 7. I want to create a Plain C++ Project (Non-QT Project); however I get an error: No valid kits found. When I click on Options->Kits, I see the Desktop (default) kit, and it shows no errors.
Am I getting the error because I didn't install a Qt library? If so, is there any way I can bypass downloading/installing that and just use the IDE?

Answer 1

Found the issue. Qt Creator wants you to use a compiler listed under one of their Qt libraries. Use the Maintenance Tool to install this.
To do so:
Go to Tools -> Options.... Select Build & Run on left. Open Kits tab.
You should have Manual -> Desktop (default) line in list. Choose it.
Now select something like Qt 5.5.1 in PATH (qt5) in Qt version
combobox and click Apply button. From now you should be able to
create, build and run empty Qt project.

Answer 2

Though OP is asking about Windows, this error also occurs on Ubuntu Linux and Google lists this result first when you search for the error"QtCreator: No valid kits found".
On Ubuntu this is solved by running:
For Qt5:
sudo apt-get install qt5-default
For Qt4:
sudo apt-get install qt4-dev-tools libqt4-dev libqt4-core libqt4-gui
This question is answered here and here, though those entries are less SEO-friendly...

Answer 3

No valid Kits found
The problem occurs because qt-creator don't know the versions of your qt,
your compiler or your debugger.
First off, let's solve the Qt versions. It may normally solve the others too ;).
You try to create a new project, run select a kit and then there is no kit available in the list.
Follow the steps:
Execute in your terminal the command: sudo apt-get install qt5-default
to install qt version 5.
Verify the version of your Qt and the location of your qmake file. Do this by executing in your terminal the command qmake --version.
You may have a result similar to this line.
QMake version 3.1
Using Qt version 5.9.5 in /usr/lib/x86_64-linux-gnu. What's important here is the location /usr/lib/x86_64-linux-gnu.
Open your Qt-creator.
Go to "Tools>Options" or "Outils>Options"
Select the Qt Versions combobox and select and click "Add" or "Ajouter"
Then find the qmake file in the location of step 2. Here /usr/lib/x86_64-linux-gnu/qt5/bin/ here you have the qmake file for qt5. Open it, click Apply.
Go to "Kits" combobox. Select Desktop(by default) or Desktop(par défaut). Then scroll down to the button to select Qt version: and list down to select the version you just add.
8.Then apply all. Check your compiler and debugger and it's ok. You're done.
Yes I ...
Hope it's help ;)

Answer 4

In my case the issue was that my default kit's Qt version was None.
Go to Tools -> Options... -> Build & Run -> Kits tab, click on the kit you want to make as default and you'll see a list of fields beneath, one of which is Qt version. If it's None, change it to one of the versions available to you in the Qt versions tab which is just next to the Kits tab.

Answer 5

For QT 5.* if you face error at Kits, like No Valid Kits Found, go to Options->Build&Run-> (Kits tab) then you see a Manual category which should list Desktop as the default.
Just go to your OS Terminal and write sudo apt-get install qt5-default, go back to QT Creator and Start your New Project, and there you see the kit option Desktop included in the list.

Answer 6

I had a similar problems after installing Qt in Windows.
This could be because only the Qt creator was installed and not any of the Qt libraries during initial installation. When installing from scratch use the online installer and select the following to install:
For starting, select at least one version of Qt libs (ex Qt 5.15.1) and the c++ compiler of choice (ex MinGW 8.1.0 64-bit).
Select Developer and Designer Tools. I kept the selected defaults.
Note: The choice of the Qt libs and Tools can also be changed post initial installation using MaintenanceTool.exe under Qt installation dir C:\Qt. See here.

Answer 7

In my case, it goes well after I installed CMake in my system:)
sudo pacman -S cmake
for manjaro operating system.

Answer 8

Another way to solve this issue (I did it on Ubuntu 16.04 but it might also work for windows and other Ubuntu versions):
While going through the installation steps, when you reach the step where you choose which packages to install via check boxes, instead of just pressing next with the default "Tools" checkbox selected also check the box for the version of QT you would like in addition to the "Tools" box. I usually check the first box which is the latest version of QT.
After doing this you should not see the "no valid kits found" issue described in this thread.
Happy Coding.

Answer 9

on macOS: (as of 2021)
brew install qt<latest_version> e.g. qt6
qmake --version will output:
QMake version 3.1
Using Qt version 6.0.3 in /usr/local/Cellar/qt/6.0.3_2/lib
(This is the path to the QT installation --> `/usr/local/Cellar/qt/6.0.3_2/lib`)
Go to `Preferences -> Kits -> Qt Versions
Click Add then navigate to /usr/local/Cellar/qt/6.0.3_2/bin
Select qmake executable
Go to Kits tab
Select Desktop (x86-darwin.....) in the list
Scroll down to Qt version dropdown box and select your newly installed Qt version.
Click Ok.

Answer 10

I had solved this issue on my Linux mint , first :
install qmake : sudo apt-get install qt5-default
go to terminal and type qmake, you should get the path of qmake
create a new project (application widget type ), when you reach
the kits part you should find desktop list item, click manage then
go to the kits tab bar and scroll down until you find a drop-down called
Qt version, click manage and paste the path there then submit.
Now the settings are done !!