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:[0-9]+ \(include\)
+
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:[0-9]+ \(include\)
+
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:[0-9]+ \(include\)
+
CMake Warning at BadCONFIG\.cmake:1 \(add_custom_target\):
  Warning evaluating generator expression:

    \$<CONFIG:Release,Foo-Second>

  The config name of "Foo-Second" is invalid
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
+
CMake Generate step failed\.  Build files cannot be regenerated correctly\.$
