Im trying to build simple Qt Quick project and want to work with it outside Qt Creator. It means coding, building and running program only with tools like
The main problem, why "First attempt" failed is because Qt5 installed itself in
~/Qt and CMake searched for *.cmake configuration files in /usr/lib/x86_64-linux-gnu/cmake/ (I didn't metion that i use Ubuntu 16 LTS, which have cmake 3.5.1 preinstalled).
So the way to solve this problem was to copy everything that was in
~/Qt/*last cmake version*/gcc_64 (in my case ~/Qt/5.13.0/gcc_64)
into /usr/lib/ via sudo cp -a ~/Qt/5.13.0/gcc_64/* /usr/lib/
The answer to second is short:
This happend because by default Qt Creator sets CMake output into Ninja makefiles.
Go to Tools > Options > Kits and add desired configuration or edit existing.