Log Message:
Import ghdl-0.29 as cad/ghdl.

GHDL is an open-source simulator for the VHDL language. GHDL allows
you to compile and execute your VHDL code directly in your PC.
Combined with a GUI-based wave viewer and a good VHDL text editor,
GHDL is a very powerful tool for writing, testing and simulating
your VHDL code.