unittests/Target/CMakeLists.txt - llvm-project/llvm - Git at Google

 foreach(t ${LLVM_TARGETS_TO_BUILD})
   if(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${t})
     add_subdirectory(${t})
   endif()
 endforeach()
	foreach(t ${LLVM_TARGETS_TO_BUILD})
	if(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${t})
	add_subdirectory(${t})
	endif()
	endforeach()