CMake: New dependency graph requires either Boost or C++11

CMakeLists.txt

@@ -673,9 +673,12 @@ if(NOT WITH_BOOST)
 elseif(WITH_CYCLES OR WITH_OPENIMAGEIO OR WITH_AUDASPACE OR WITH_INTERNATIONAL OR WITH_OPENVDB OR WITH_OPENCOLORIO OR WITH_MOD_BOOLEAN)
 	# Keep enabled
 else()
+	# New dependency graph needs either Boost or C++11 for function bindings.
+	if(NOT USE_CPP11)
 		# Enabled but we don't need it
 		set(WITH_BOOST OFF)
 	endif()
+endif()
 
 # auto enable openimageio for cycles
 if(WITH_CYCLES)