-At last check (cmake 3.14.3 and msvc 16.0.3) using the 2019 tools fails to
-build the in-tree LLVM build with a CMake error, so use 2017 instead by
-including the “MSVC v141 – VS 2017 C++ x64/x86 build tools (v14.16)” component.
+(If you're installing cmake yourself, be careful that “C++ CMake tools for
+Windows” doesn't get included under “Individual components”.)