%Error-UNSUPPORTED: t/t_config_unsup.v:24:1: Unsupported: config
   24 | config cfg;
      | ^~~~~~
                    ... For error description see https://verilator.org/warn/UNSUPPORTED?v=latest
%Error-UNSUPPORTED: t/t_config_unsup.v:25:11: Unsupported: config cell
   25 |    design t;
      |           ^
%Error-UNSUPPORTED: t/t_config_unsup.v:28:4: Unsupported: config rule
   28 |    default liblist;   
      |    ^~~~~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:29:4: Unsupported: config rule
   29 |    default liblist liba libb;
      |    ^~~~~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:32:4: Unsupported: config rule
   32 |    instance t.m20 liblist;   
      |    ^~~~~~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:33:4: Unsupported: config rule
   33 |    instance t.m21 liblist libc;
      |    ^~~~~~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:34:4: Unsupported: config rule
   34 |    instance t.m22 liblist libc libd;   
      |    ^~~~~~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:35:4: Unsupported: config rule
   35 |    instance t.m23 liblist libc libd;   
      |    ^~~~~~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:36:4: Unsupported: config rule
   36 |    instance t.m24 liblist libc libd;   
      |    ^~~~~~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:39:4: Unsupported: config rule
   39 |    instance t.m30 use cell_identifier;
      |    ^~~~~~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:39:19: Unsupported: config use
   39 |    instance t.m30 use cell_identifier;
      |                   ^~~
%Error-UNSUPPORTED: t/t_config_unsup.v:40:4: Unsupported: config rule
   40 |    instance t.m31 use lib_id.cell_id;
      |    ^~~~~~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:40:19: Unsupported: config use
   40 |    instance t.m31 use lib_id.cell_id;
      |                   ^~~
%Error-UNSUPPORTED: t/t_config_unsup.v:41:4: Unsupported: config rule
   41 |    instance t.m32 use #();
      |    ^~~~~~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:41:19: Unsupported: config use
   41 |    instance t.m32 use #();
      |                   ^~~
%Error-UNSUPPORTED: t/t_config_unsup.v:44:4: Unsupported: config rule
   44 |    cell m40 liblist libc libd;
      |    ^~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:44:9: Unsupported: config cell
   44 |    cell m40 liblist libc libd;
      |         ^~~
%Error-UNSUPPORTED: t/t_config_unsup.v:45:4: Unsupported: config rule
   45 |    cell work.m41 liblist libc libd;
      |    ^~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:45:9: Unsupported: config cell
   45 |    cell work.m41 liblist libc libd;
      |         ^~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:46:4: Unsupported: config rule
   46 |    cell m42 use m42alt;
      |    ^~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:46:9: Unsupported: config cell
   46 |    cell m42 use m42alt;
      |         ^~~
%Error-UNSUPPORTED: t/t_config_unsup.v:46:13: Unsupported: config use
   46 |    cell m42 use m42alt;
      |             ^~~
%Error-UNSUPPORTED: t/t_config_unsup.v:47:4: Unsupported: config rule
   47 |    cell work.m43 use work.m43alt;
      |    ^~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:47:9: Unsupported: config cell
   47 |    cell work.m43 use work.m43alt;
      |         ^~~~
%Error-UNSUPPORTED: t/t_config_unsup.v:47:18: Unsupported: config use
   47 |    cell work.m43 use work.m43alt;
      |                  ^~~
%Error: Exiting due to