You might be interested in the now defunct Meta-FPGA (MPGA) project, which attempted this exact thing: ftp://ftp2.de.freebsd.org/pub/misc/opencores/ml-archive/

You might be interested in the now defunct Meta-FPGA (MPGA) project, which attempted this exact thing: ftp://ftp2.de.freebsd.org/pub/misc/opencores/ml-archive/archives/cores/0109/msg00019.html The idea was to use the proprietary tools to produce a once off "meta-FPGA" bitstream for each device. From then on, the open-source MPGA tools would be used to synthesise, place and route designs.