abc : ABC: System for Sequential Logic Synthesis and Formal Verification ( https://github.com/YosysHQ/abc )
icestorm : Lattice iCE40 FPGAs Bitstream Documentaion (Reverse Engineered) ( http://bygone.clairexen.net/icestorm/ )
nextpnr : Portable FPGA place and route tool ( https://github.com/YosysHQ/nextpnr )
yosys : Framework for Verilog RTL synthesis ( https://yosyshq.net/yosys/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a qsx
For Paludis use this rsync : rsync://gentoo.zugaina.org/qsx-portage
If you have a problem : ycarus(-at-)zugaina.org