No CMAKE_C_COMPILER could be found. No CMAKE_CXX_COMPILER could be found.

[buildSystemPerson]

Looks like someone is having a similar issue here:

Windows configure error when using the command line: "The C/CXX compiler identification is unknown.."

Guessing: The cmake-gui chooses the 32bit (host and target) version of the compiler. You choose the host=64bit version with CLI