Installing GHDL on macOS Big Sur

I wanted to install GHDL on my Mac computer.

Starting at the GHDL GitHub site, I learned that one could use a prebuilt version.

On this page with GHDL releases, I found and downloaded such a prebuilt version, as

curl -L https://github.com/ghdl/ghdl/releases/download/v0.37/ghdl-0.37-macosx-mcode.tgz --output ghdl-0.37-macosx-mcode.tgz

After unpacking, as

tar zxvf ghdl-0.37-macosx-mcode.tgz 

and moving the unpacked content to a directory where I wanted GHDL to be located, as

mkdir -p $HOME/opt/ghdl
mv bin $HOME/opt/ghdl
mv include $HOME/opt/ghdl
mv lib $HOME/opt/ghdl

I could try it out on an example code

use std.textio.all;

entity hello_world is
end hello_world;

architecture behavior of hello_world is
begin
  process
    variable the_line: line;
  begin
    write(the_line, String'("Hello, world"));
    writeline(output, the_line);
    wait;
  end process;
end behavior;

stored in a file hello.vhdl, as

$ export PATH=$HOME/opt/ghdl/bin:$PATH
$ ghdl -a hello.vhdl 
$ ghdl -r hello_world
Hello, world
$