Odin II is used for logic synthesis and elaboration, converting a subset of the Verilog Hardware Description Language (HDL) into a BLIF netlist.
Odin-II has been deprecated and will be removed in a future version. Now VTR uses Parmys as the default frontend which utilizes Yosys as elaborator with partial mapping features enabled.
To build the VTR flow with the Odin-II front-end you may use the VTR Makefile wrapper, by calling the
make CMAKE_PARAMS="-DWITH_ODIN=ON" command in the $VTR_ROOT directory.