Circular dependency in tolua++ bin

[SirNate0]

I may be misunderstanding something, but it seems to me that this produces an implicit circular dependency:

U3D/Source/ThirdParty/toluapp/src/bin/CMakeLists.txt

Lines 46 to 62 in eefc929

	# Define target name
	set (TARGET_NAME tolua++)
	# Define generated source files
	if (URHO3D_UPDATE_SOURCE_TREE)
	set (UPDATE_COMMAND COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_CURRENT_BINARY_DIR}/generated/toluabind.c ${CMAKE_CURRENT_SOURCE_DIR}/toluabind.c)
	endif ()
	file (GLOB TOLUA lua/*.lua)
	add_custom_command (OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/generated/toluabind.c
	COMMAND ${CMAKE_BINARY_DIR}/bin/tool/tolua++ -o ${CMAKE_CURRENT_BINARY_DIR}/generated/toluabind.c -H ${CMAKE_CURRENT_BINARY_DIR}/generated/toluabind.h -n tolua tolua_scons.pkg 2>${NULL_DEVICE} || ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_CURRENT_SOURCE_DIR}/toluabind.c ${CMAKE_CURRENT_BINARY_DIR}/generated/toluabind.c
	${UPDATE_COMMAND}
	DEPENDS ${TOLUA} tolua_scons.pkg
	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
	COMMENT "Generating toluabind.c and toluabind.h")
	# Define source files
	define_source_files (EXTRA_CPP_FILES tolua.c ${CMAKE_CURRENT_BINARY_DIR}/generated/toluabind.c)

The target is tolua++, which has a source file ${CMAKE_CURRENT_BINARY_DIR}/generated/toluabind.c, yet this file is the output of the custom command that uses tolua++ to produce the output (though CMake is not actually told that tolua++ is a dependency of the generated file).