I'm not sure that's ok.

CMAKE_GENERATOR_OPTIONS='-G"Visual Studio 15 2017 Win64"'
cmake $CMAKE_GENERATOR_OPTIONS $CMAKE_OPTIONS \

Error is
CMake Error: Could not create named generator "Visual

Cmake version 3.8.14

for my configuration this is OK

CMAKE_CONFIG_GENERATOR="Visual Studio 15 2017 Win64" 
bis="-G$CMAKE_CONFIG_GENERATOR"
empty=''
cmake "$bis" "$empty" \

I haven't got vs2019 : i cannot test -A option empty='-Ax64' . -A option with VS 2017 give an error
`CMake Error at CMakeLists.txt:107 (enable_language):
Generator

Visual Studio 15 2017 Win64

does not support platform specification, but platform

x64

was specified.
`

👍