^CMake Error at TARGET_GENEX_EVAL-no-target.cmake:2 \(add_custom_command\):
  Error evaluating generator expression:

    \$<TARGET_GENEX_EVAL:,>

  \$<TARGET_GENEX_EVAL:tgt, ...> expression requires a non-empty valid target
  name.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)