http://zenwalk.pinguix.com/user-accounts/rsamurti/verilog/ZENBUILD
http://zenwalk.pinguix.com/user-accounts/rsamurti/verilog/build-verilog.sh
ftp://ftp.icarus.com/pub/eda/verilog/v0.9/verilog-0.9.5.tar.gz
