CMake Error at BadCONFIG.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<CONFIG>

  \$<CONFIG> expression requires exactly one parameter.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
+
CMake Error at BadCONFIG.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<CONFIG:.>

  Expression syntax not recognized.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
+
CMake Error at BadCONFIG.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<CONFIG:Foo,Bar>

  \$<CONFIG> expression requires exactly one parameter.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
+
CMake Error at BadCONFIG.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<CONFIG:Foo-Bar>

  Expression syntax not recognized.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)
+
CMake Error at BadCONFIG.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<CONFIG:Foo-Nested>

  Expression syntax not recognized.
Call Stack \(most recent call first\):
  CMakeLists.txt:3 \(include\)$