Build with Ninja fails: error: dependency cycle

See libmscore/CMakeListe.txt, at the end and CMakeLists.txt, lines 750-755, maybe Ninja needs a similar treatment?

I am having that same error here on windows 10, mingw. How did you fix the issue?

There that issue doesn't exist as far as I can tell (I'm using MinGW too and it works)
Hmm, not in the current latest 3.x at least, but there was such an issue a couple days ago, got fixed pretty quickly then though

Hey, was it solved? I am having the same issue with Ubuntu 20.04 and QtCreator 4.14.0, Qt 5.15.2. Branch: MuseScore 3.6.1.

I don't remember what exactly had to be done, but it was something like cleaning and rebuilding. Not something we had to push a fix to master for.

Unfortunately, just cleaning and rebuilding didn't work. There are some other reports here, also refering to MuseScore: https://bugs.gentoo.org/684722 and here: https://gentoobrowse.randomdan.homeip.net/packages/media-sound/musescore

There is also a report on CMake, but for another software: https://gitlab.kitware.com/cmake/cmake/-/issues/17599

Workaround: use Qt 5.12.8 instead of 5.15.

Or 5.12.10, the latest

Which is the workaround to compile Musescore 3.6.x on Ubuntu 20.0.4?

Using Qt 5.12.8 - 5.12.10, not 5.15

I have Qt 5.12.8 but Musescore require 5.15

No, the 3.x branches do not, they require 5.9 or later, only the master branch does require 5.15