Fix compile warning on unused member function variable (#4567).

Changes

@@ -41,6 +41,7 @@ Verilator 5.017 devel
 * Fix broken link error for enum references (#4551). [Anthony Donlon]
 * Fix instance arrays connecting to array of structs (#4557). [raphmaster]
 * Fix shift to remove operation side effects (#4563).
+* Fix compile warning on unused member function variable (#4567).
 * Fix preprocessor to show `line 2 on resumed file.
 
 

configure.ac

@@ -443,14 +443,15 @@ m4_foreach([cflag],[
         [-Qunused-arguments],
         [-Wno-bool-operation],
         [-Wno-constant-logical-operand],
-        [-Wno-tautological-bitwise-compare],
         [-Wno-parentheses-equality],
+        [-Wno-shadow],
         [-Wno-sign-compare],
+        [-Wno-tautological-bitwise-compare],
         [-Wno-uninitialized],
+        [-Wno-unused-but-set-parameter],
         [-Wno-unused-but-set-variable],
         [-Wno-unused-parameter],
-        [-Wno-unused-variable],
-        [-Wno-shadow]],[
+        [-Wno-unused-variable]],[
     _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_NO_UNUSED,cflag)
     # CMake will test what flags work itself, so pass all flags through to it
     CFG_CXX_FLAGS_CMAKE="$CFG_CXX_FLAGS_CMAKE cflag"

test_regress/t/t_class_func_arg_unused.pl

@@ -0,0 +1,21 @@
+#!/usr/bin/env perl
+if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); die; }
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2023 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);
+
+compile(
+    );
+
+execute(
+    check_finished => 1,
+    );
+
+ok(1);
+1;

test_regress/t/t_class_func_arg_unused.v

@@ -0,0 +1,29 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2023 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
+
+package uvm_pkg;
+
+class uvm_reg_field; // extends uvm_object;
+   function void configure(bit overde, bit is_rand);
+      if (overde) is_rand = 0;
+      if (!is_rand) ;   // value.rand_mode(0);
+      // See issue #4567
+   endfunction
+endclass
+
+endpackage
+
+module t(/*AUTOARG*/);
+
+   initial begin
+      uvm_pkg::uvm_reg_field c = new;
+      c.configure(1, 0);
+      c.configure(0, 0);
+      $write("*-* All Finished *-*\n");
+      $finish;
+   end
+
+endmodule