From my experience, you just need to search the missing library in ‘path_to/msys64\mingw64\lib’ and copy it where ART is installed. The issue was discussed for RT on the forum, a dependency was added to another package for this library and now it is needed…
Regarding libssp-0.dll: it is belongs to package
gcc-libs and was not required before gcc10. I will add it.
launching the builds now
edit : updated builds uploaded
The znver2 build uses the -march=znver2 tag. It is in principle optimised for ryzen architecture. A specific list of tags is thus used to adapt code to the peculiar architecture and operation sets. The list of tags generated is given in the readme alongside the builds. I cannot go really further in the explanation.
The best is to benchmark on your PC against a generic build. It should be faster.
If you have MSYS2 installed you should find the path I mention in the MSYS2 installation folder.
Otherwise, you are most likely better using the new build from @gaaned92