> Hi,
> We are switching to a makefile to build our Xilinx FPGA bit files. Can
> we expect to get an identical bit file (except for date/time in the
> bitfile header) if we build through the ISE gui vs building via the
> command line?
> What we have found is that the output ngd file from the ngdbuild
> process (Translate) is not the same in both cases. The file size
> differs by 100 bytes, and the resulting bitfiles end up being very
> different. Can we expect the ngd file to be identical?
>
> We use synplicity to synthesize the design, which creates an edif
> netlist. The edif netlist going into the ISE flow and makefile flow
> are identical.
>
> Cheers
> Andrew

Are you sure that the settings you are using are identical. I was under
the impression that ISE was just a GUI wrapper that sent commands to a common
set of implementation programs.


---Matthew Hicks