CMake Error at .*Modules/WriteCompilerDetectionHeader\.cmake:[0-9]+ \(message\):
  If OUTPUT_FILES_VAR is specified, then OUTPUT_DIR must also be specified\.
Call Stack \(most recent call first\):
  MultiNoOutdir\.cmake:4 \(write_compiler_detection_header\)
  CMakeLists\.txt:3 \(include\)
