GNAT.OS_Lib Getenv example (Gautier de Montmollin)
With GNAT, you can obtain enviornment variables
by the GNAT.OS_lib getenv function.
E.g.
with GNAT.OS_lib;
...
function Get_env_string(name:String) return String is
begin
return GNAT.OS_lib.getenv(name).all;
end;
