Visual Studio 2017: vcvars for toolset v140

Question

I installed Visual Studio 2017 and toolsets v140 and v141. To work with v140 toolset, I need to set the necessary environment via vc

Answer 1

I've managed to solve, so to speek, this issue using the following approach. For toolset v140 vcvars tries to obtain the required data from the registry (Visual Studio 14.0 installation directory), but, because it fails to do so, exits with an error. If you add to the Windows registry the required value, vcvars will work correctly. In case of toolset v140 installed along with Visual Studio 2017 this path for the default installation is C:\Program Files (x86)\Microsoft Visual Studio\Shared\14.0\.

You need to locate the existing key where the Visual Studio 2017 installation directory is set (in my case it is HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\VisualStudio\SxS\VS7) and add the key with name 14.0 and value C:\Program Files (x86)\Microsoft Visual Studio\Shared\14.0\