Verilator is the fastest free Verilog HDL simulator, and beats most commercial
simulators. It compiles synthesizable Verilog, plus some PSL, SystemVerilog and
Synthesis assertions into C++ or SystemC code. It is designed for large projects
where fast simulation performance is of primary concern, and is especially well
suited to generate executable models of CPUs for embedded software design teams.

1. build dependencies:
   1. /proc
   2. flex
   3. gcc-c++
   4. gdb
   5. perl-podlators
   6. python3-module-sphinx-sphinx-build-symlink
   7. python3-module-sphinx_rtd_theme
   8. tex(dehypht.tex)
   9. rpm-build-python3