cmake-gui from KDE:Qt:6.2 project
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Add repository and install manually
For openSUSE Leap 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt:6.2/openSUSE_Leap_15.3/KDE:Qt:6.2.repo zypper refresh zypper install cmake-gui