Problems installing on Linux
The mscore/CMakeLists.txt file, as it is, doesn't install on my computer. Instead, I have to comment out lines 620-631 (incl.), after which it will install fine. I suggest that a fix might be to change line 619 from:
if (NOT APPLE AND USE_WEBENGINE)
if (NOT APPLE AND NOT LN_EXECUTABLE AND USE_WEBENGINE)
and then changing line 632 respectively to
endif(NOT APPLE AND NOT LN_EXECUTABLE AND USE_WEBENGINE)
This fixes the problem for me. Tested on Ubuntu 18.04, x86_64. Qt (5.9.5) and all MuseScore dependencies were installed using apt. Since I don't know the ins and outs about how CMake works, would this fix be an ok one to make permanently?