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

    \$<HOST_LINK:empty.c>

  \$<HOST_LINK:...> may only be used with binary targets to specify link
  options.
Call Stack \(most recent call first\):
  CMakeLists.txt:[0-9]+ \(include\)