verilator/test_regress/t/t_preproc_undefineall.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain, for
// any use, without warranty, 2009 by Wilson Snyder.
// SPDX-License-Identifier: CC0-1.0

module t;

`define UDALL
`ifndef PREDEF_COMMAND_LINE `error "Test setup error, PREDEF_COMMAND_LINE pre-missing" `endif

`undefineall

`ifdef UDALL `error "undefineall failed" `endif
`ifndef PREDEF_COMMAND_LINE `error "Deleted too much, no PREDEF_COMMAND_LINE" `endif

  initial begin
     $finish;
  end
endmodule