It seems that the run time for Windows has changed and supports more math functions than before. Since LLVM requires at least VS2015it used to, I assume that this is the run time that would be redistributed with programs built with Clang. Thusespecially on AArch64 ARM, I based this update on the header file `math.h` that accompanies it. and AMD64, since at least VS2015, if not earlier.
This patch addresses the PR40541. Unfortunately, I have no access to a Windows development environment to fully validate it.