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

    \$<STRLESS_EQUAL>

  \$<STRLESS_EQUAL> expression requires 2 comma separated parameters, but got
  0 instead.
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
+CMake Error at BadStrLessEqual.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<STRLESS_EQUAL:>

  \$<STRLESS_EQUAL> expression requires 2 comma separated parameters, but got
  1 instead.
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
+
CMake Error at BadStrLessEqual.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<STRLESS_EQUAL:,,>

  \$<STRLESS_EQUAL> expression requires 2 comma separated parameters, but got
  3 instead.
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
+
CMake Error at BadStrLessEqual.cmake:1 \(add_custom_target\):
  Error evaluating generator expression:

    \$<STRLESS_EQUAL:something,,>

  \$<STRLESS_EQUAL> expression requires 2 comma separated parameters, but got
  3 instead.
Call Stack \(most recent call first\):
  CMakeLists\.txt:[0-9]+ \(include\)
+
CMake Generate step failed\.  Build files cannot be regenerated correctly\.$
