Make build.cmd to work with different types of Visual Studio 2017 (Build Tools, Community, Pro)

[windsurfer1122]

Please update build.cmd as following to make it more flexible for different VS setups, e.g. in my case I only use VS build tools which are in "%ProgramFiles(x86)%\Microsoft Visual Studio\2017\BuildTools"

@echo off

if not "%VSINSTALLDIR%" == "" goto vsdevcmd_present
echo Please run %~0 inside a Visual Studio 2017 Tools Developer Command Prompt
exit /B

:vsdevcmd_present
call "%VSINSTALLDIR%\Common7\Tools\VsDevCmd.bat" -arch=amd64 -host_arch=amd64
cd /d "%~dp0"

...

[JeffreyO]

This might help. With CMake, you should be able to just generate the Visual Studio project files.

https://github.com/JeffreyO/pkg2zip/tree/cmake-and-aarch64-port