Tests: Add --binary with split, to check parallel builds

test_regress/t/t_flag_binary_parallel.pl

@@ -0,0 +1,30 @@
+#!/usr/bin/env perl
+if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); die; }
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2019 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+scenarios(simulator => 1);
+
+top_filename("t/t_flag_main.v");
+
+compile(
+    verilator_flags => [# Custom as don't want -cc
+                        "-Mdir $Self->{obj_dir}",
+                        "--debug-check", ],
+    verilator_flags2 => ['--binary', '--output-split 1'],
+    verilator_make_cmake => 0,
+    verilator_make_gmake => 0,
+    make_main => 0,
+    );
+
+execute(
+    check_finished => 1,
+    );
+
+ok(1);
+1;