CMake Error at NonValidTarget-COMPILER_LINKER\.cmake:[0-9]+ \(add_custom_command\):
  Error evaluating generator expression:

    \$<CXX_COMPILER_LINKER_FRONTEND_VARIANT>

  \$<CXX_COMPILER_LINKER_FRONTEND_VARIANT> may only be used with binary
  targets\.  It may not be used with add_custom_command or add_custom_target\.
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
