diff --git a/3d-viewer/3d_canvas/eda_3d_canvas.cpp b/3d-viewer/3d_canvas/eda_3d_canvas.cpp
index 998e0b3068..36803243ca 100644
--- a/3d-viewer/3d_canvas/eda_3d_canvas.cpp
+++ b/3d-viewer/3d_canvas/eda_3d_canvas.cpp
@@ -837,10 +837,8 @@ void EDA_3D_CANVAS::OnMiddleUp( wxMouseEvent& event )
 }
 
 
-void EDA_3D_CANVAS::OnTimerTimeout_Editing( wxTimerEvent& event )
+void EDA_3D_CANVAS::OnTimerTimeout_Editing( wxTimerEvent& /* event */ )
 {
-    (void)event;
-
     m_mouse_is_moving = false;
     m_mouse_was_moved = false;
 
diff --git a/3d-viewer/3d_rendering/3d_render_raytracing/light.h b/3d-viewer/3d_rendering/3d_render_raytracing/light.h
index 7d1e33ff10..ae78b15b80 100644
--- a/3d-viewer/3d_rendering/3d_render_raytracing/light.h
+++ b/3d-viewer/3d_rendering/3d_render_raytracing/light.h
@@ -131,11 +131,9 @@ public:
     void SetDirection( const SFVEC3F& aDir ) { m_inv_direction = -aDir; }
 
     // Imported functions from LIGHT
-    void GetLightParameters( const SFVEC3F& aHitPoint, SFVEC3F& aOutVectorToLight,
+    void GetLightParameters( const SFVEC3F& /* aHitPoint */, SFVEC3F& aOutVectorToLight,
                              SFVEC3F& aOutLightColor, float& aOutDistance ) const override
     {
-        (void)aHitPoint; // unused
-
         aOutVectorToLight = m_inv_direction;
         aOutDistance      = std::numeric_limits<float>::infinity();
         aOutLightColor    = m_color;
diff --git a/3d-viewer/3d_rendering/3d_render_raytracing/render_3d_raytrace.cpp b/3d-viewer/3d_rendering/3d_render_raytracing/render_3d_raytrace.cpp
index 20e95d6505..ae42701a8c 100644
--- a/3d-viewer/3d_rendering/3d_render_raytracing/render_3d_raytrace.cpp
+++ b/3d-viewer/3d_rendering/3d_render_raytracing/render_3d_raytrace.cpp
@@ -839,10 +839,8 @@ void RENDER_3D_RAYTRACE::renderBlockTracing( GLubyte* ptrPBO, signed int iBlock
 }
 
 
-void RENDER_3D_RAYTRACE::postProcessShading( GLubyte* ptrPBO, REPORTER* aStatusReporter )
+void RENDER_3D_RAYTRACE::postProcessShading( GLubyte* /* ptrPBO */, REPORTER* aStatusReporter )
 {
-    (void)ptrPBO; // unused
-
     if( m_boardAdapter.GetFlag( FL_RENDER_RAYTRACING_POST_PROCESSING ) )
     {
         if( aStatusReporter )
@@ -894,10 +892,8 @@ void RENDER_3D_RAYTRACE::postProcessShading( GLubyte* ptrPBO, REPORTER* aStatusR
 }
 
 
-void RENDER_3D_RAYTRACE::postProcessBlurFinish( GLubyte* ptrPBO, REPORTER* aStatusReporter )
+void RENDER_3D_RAYTRACE::postProcessBlurFinish( GLubyte* ptrPBO, REPORTER* /* aStatusReporter */ )
 {
-    (void) aStatusReporter; //unused
-
     if( m_boardAdapter.GetFlag( FL_RENDER_RAYTRACING_POST_PROCESSING ) )
     {
         // Now blurs the shader result and compute the final color
diff --git a/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/cylinder_3d.cpp b/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/cylinder_3d.cpp
index fe6ffd15e6..bb3af2279f 100644
--- a/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/cylinder_3d.cpp
+++ b/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/cylinder_3d.cpp
@@ -167,9 +167,7 @@ bool CYLINDER::Intersects( const BBOX_3D& aBBox ) const
 }
 
 
-SFVEC3F CYLINDER::GetDiffuseColor( const HITINFO& aHitInfo ) const
+SFVEC3F CYLINDER::GetDiffuseColor( const HITINFO& /* aHitInfo */ ) const
 {
-    (void)aHitInfo; // unused
-
     return m_diffusecolor;
 }
diff --git a/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/dummy_block_3d.cpp b/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/dummy_block_3d.cpp
index 438b74b113..94fb3ebdd1 100644
--- a/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/dummy_block_3d.cpp
+++ b/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/dummy_block_3d.cpp
@@ -86,9 +86,7 @@ bool DUMMY_BLOCK::Intersects( const BBOX_3D& aBBox ) const
 }
 
 
-SFVEC3F DUMMY_BLOCK::GetDiffuseColor( const HITINFO& aHitInfo ) const
+SFVEC3F DUMMY_BLOCK::GetDiffuseColor( const HITINFO& /* aHitInfo */ ) const
 {
-    (void)aHitInfo; // unused
-
     return m_diffusecolor;
 }
diff --git a/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/layer_item_3d.cpp b/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/layer_item_3d.cpp
index 1ef091700d..41a2d651da 100644
--- a/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/layer_item_3d.cpp
+++ b/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/layer_item_3d.cpp
@@ -475,9 +475,7 @@ bool LAYER_ITEM::Intersects( const BBOX_3D& aBBox ) const
 }
 
 
-SFVEC3F LAYER_ITEM::GetDiffuseColor( const HITINFO& aHitInfo ) const
+SFVEC3F LAYER_ITEM::GetDiffuseColor( const HITINFO& /* aHitInfo */ ) const
 {
-    (void)aHitInfo; // unused
-
     return m_diffusecolor;
 }
diff --git a/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/plane_3d.cpp b/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/plane_3d.cpp
index 5124bbef40..9f3ad221af 100644
--- a/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/plane_3d.cpp
+++ b/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/plane_3d.cpp
@@ -118,9 +118,7 @@ bool XY_PLANE::Intersects( const BBOX_3D& aBBox ) const
 }
 
 
-SFVEC3F XY_PLANE::GetDiffuseColor( const HITINFO& aHitInfo ) const
+SFVEC3F XY_PLANE::GetDiffuseColor( const HITINFO& /* aHitInfo */ ) const
 {
-    (void)aHitInfo; // unused
-
     return m_diffusecolor;
 }
diff --git a/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/round_segment_3d.cpp b/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/round_segment_3d.cpp
index f09da96ea1..809aed7cbf 100644
--- a/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/round_segment_3d.cpp
+++ b/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/round_segment_3d.cpp
@@ -415,9 +415,7 @@ bool ROUND_SEGMENT::Intersects( const BBOX_3D& aBBox ) const
 }
 
 
-SFVEC3F ROUND_SEGMENT::GetDiffuseColor( const HITINFO& aHitInfo ) const
+SFVEC3F ROUND_SEGMENT::GetDiffuseColor( const HITINFO& /* aHitInfo */ ) const
 {
-    (void)aHitInfo; // unused
-
     return m_diffusecolor;
 }
diff --git a/common/dialog_shim.cpp b/common/dialog_shim.cpp
index 2bfdc8b38e..8f2bf9a4d3 100644
--- a/common/dialog_shim.cpp
+++ b/common/dialog_shim.cpp
@@ -23,6 +23,7 @@
  */
 
 #include <dialog_shim.h>
+#include <ignore.h>
 #include <kiway_player.h>
 #include <pgm_base.h>
 #include <tool/tool_manager.h>
@@ -336,6 +337,8 @@ static void selectAllInTextCtrls( wxWindowList& children )
             {
                 childTextCtrl->SelectAll();
             }
+#else
+            ignore_unused( childTextCtrl );
 #endif
         }
         else if( wxStyledTextCtrl* scintilla = dynamic_cast<wxStyledTextCtrl*>( child ) )
@@ -536,8 +539,7 @@ void DIALOG_SHIM::OnButton( wxCommandEvent& aEvent )
             // isn't closing anyway)
             if( Validate() )
             {
-                bool success = TransferDataFromWindow();
-                (void) success;
+                ignore_unused( TransferDataFromWindow() );
             }
         }
         else if( id == GetEscapeId() ||
diff --git a/common/kiway.cpp b/common/kiway.cpp
index 34494dd2d3..6476120538 100644
--- a/common/kiway.cpp
+++ b/common/kiway.cpp
@@ -24,6 +24,7 @@
 
 #include <cstring>
 
+#include <ignore.h>
 #include <macros.h>
 #include <kiway.h>
 #include <kiway_player.h>
@@ -280,7 +281,7 @@ KIFACE* KIWAY::KiFACE( FACE_T aFaceId, bool doLoad )
             if( kiface->OnKifaceStart( m_program, m_ctl ) )
             {
                 // Tell dso's wxDynamicLibrary destructor not to Unload() the program image.
-                (void) dso.Detach();
+                ignore_unused( dso.Detach() );
 
                 return m_kiface[aFaceId] = kiface;
             }
diff --git a/common/kiway_holder.cpp b/common/kiway_holder.cpp
index 74a5f2e723..aec5a46dd4 100644
--- a/common/kiway_holder.cpp
+++ b/common/kiway_holder.cpp
@@ -23,6 +23,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  */
 
+#include <ignore.h>
 #include <kiway.h>
 #include <kiway_holder.h>
 #include <project.h>
@@ -47,11 +48,11 @@ void KIWAY_HOLDER::SetKiway( wxWindow* aDest, KIWAY* aKiway )
     if( !strcmp( typeid(aDest).name(), "DIALOG_EDIT_LIBENTRY_FIELDS_IN_LIB" ) )
     {
         int breakhere=1;
-        (void) breakhere;
+        ignore_unused( breakhere );
     }
 #endif
 
-    (void) aDest;
+    ignore_unused( aDest );
 
     m_kiway = aKiway;
 }
diff --git a/common/plotters/PDF_plotter.cpp b/common/plotters/PDF_plotter.cpp
index 95949a492e..4b70ed2493 100644
--- a/common/plotters/PDF_plotter.cpp
+++ b/common/plotters/PDF_plotter.cpp
@@ -34,6 +34,7 @@
 #include <wx/zstream.h>
 
 #include <advanced_config.h>
+#include <ignore.h>
 #include <macros.h>
 #include <trigo.h>
 
@@ -535,7 +536,7 @@ void PDF_PLOTTER::closePdfStream()
 
     int rc = fread( inbuf, 1, stream_len, workFile );
     wxASSERT( rc == stream_len );
-    (void) rc;
+    ignore_unused( rc );
 
     // We are done with the temporary file, junk it
     fclose( workFile );
diff --git a/common/richio.cpp b/common/richio.cpp
index 2420d332ab..35f95f1ac9 100644
--- a/common/richio.cpp
+++ b/common/richio.cpp
@@ -26,6 +26,7 @@
 #include <cstdarg>
 #include <config.h> // HAVE_FGETC_NOLOCK
 
+#include <ignore.h>
 #include <richio.h>
 #include <errno.h>
 
@@ -93,8 +94,7 @@ std::string StrPrintf( const char* format, ... )
     va_list     args;
 
     va_start( args, format );
-    int ignore = vprint( &ret, format, args );
-    (void) ignore;
+    ignore_unused( vprint( &ret, format, args ) );
     va_end( args );
 
     return ret;
diff --git a/common/tool/tool_dispatcher.cpp b/common/tool/tool_dispatcher.cpp
index ff06aaa81a..747b2bf6d9 100644
--- a/common/tool/tool_dispatcher.cpp
+++ b/common/tool/tool_dispatcher.cpp
@@ -23,6 +23,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  */
 
+#include <ignore.h>
 #include <macros.h>
 #include <trace_helpers.h>
 
@@ -378,7 +379,7 @@ OPT<TOOL_EVENT> TOOL_DISPATCHER::GetToolEvent( wxKeyEvent* aKeyEvent, bool* keyI
 #ifdef __APPLE__
         if( unicode_key >= 'A' && unicode_key <= 'Z' && key >= WXK_CONTROL_A && key <= WXK_CONTROL_Z )
 #else
-        (void) unicode_key; //not used: avoid compil warning
+        ignore_unused( unicode_key );
 
         if( key >= WXK_CONTROL_A && key <= WXK_CONTROL_Z )
 #endif
diff --git a/common/widgets/gal_options_panel.cpp b/common/widgets/gal_options_panel.cpp
index 622f8f655c..057b27690a 100644
--- a/common/widgets/gal_options_panel.cpp
+++ b/common/widgets/gal_options_panel.cpp
@@ -219,7 +219,7 @@ bool GAL_OPTIONS_PANEL::TransferDataToWindow()
     else
         m_renderingEngine->SetSelection( 1 );
 #else
-    (void) m_drawFrame;  // Quiet unused variable warning
+    ignore_unused( m_drawFrame );
 #endif
 
     m_gridSnapOptions->SetSelection( UTIL::GetConfigForVal( gridSnapConfigVals,
diff --git a/eeschema/netlist_exporters/netlist_exporter_cadstar.cpp b/eeschema/netlist_exporters/netlist_exporter_cadstar.cpp
index 1936105ca8..df2261847d 100644
--- a/eeschema/netlist_exporters/netlist_exporter_cadstar.cpp
+++ b/eeschema/netlist_exporters/netlist_exporter_cadstar.cpp
@@ -37,9 +37,8 @@
 static wxString StartLine( wxT( "." ) );
 
 bool NETLIST_EXPORTER_CADSTAR::WriteNetlist( const wxString& aOutFileName,
-                                             unsigned aNetlistOptions )
+                                             unsigned /* aNetlistOptions */ )
 {
-    (void)aNetlistOptions;      //unused
     int ret = 0;
     FILE* f = nullptr;
 
diff --git a/eeschema/netlist_exporters/netlist_exporter_orcadpcb2.cpp b/eeschema/netlist_exporters/netlist_exporter_orcadpcb2.cpp
index d546c9b41d..b53022be4a 100644
--- a/eeschema/netlist_exporters/netlist_exporter_orcadpcb2.cpp
+++ b/eeschema/netlist_exporters/netlist_exporter_orcadpcb2.cpp
@@ -37,9 +37,8 @@
 
 
 bool NETLIST_EXPORTER_ORCADPCB2::WriteNetlist( const wxString& aOutFileName,
-                                               unsigned aNetlistOptions )
+                                               unsigned /* aNetlistOptions */ )
 {
-    (void)aNetlistOptions;      //unused
     FILE* f = nullptr;
     wxString    field;
     wxString    footprint;
diff --git a/eeschema/sch_edit_frame.cpp b/eeschema/sch_edit_frame.cpp
index 96edd2c78b..608d421811 100644
--- a/eeschema/sch_edit_frame.cpp
+++ b/eeschema/sch_edit_frame.cpp
@@ -33,6 +33,7 @@
 #include <gestfich.h>
 #include <hierarch.h>
 #include <dialogs/html_message_box.h>
+#include <ignore.h>
 #include <invoke_sch_dialog.h>
 #include <string_utils.h>
 #include <kiface_base.h>
@@ -755,7 +756,7 @@ void SCH_EDIT_FRAME::ResolveERCExclusions()
     for( SCH_MARKER* marker : Schematic().ResolveERCExclusions() )
     {
         SCH_SHEET_PATH errorPath;
-        (void) sheetList.GetItem( marker->GetRCItem()->GetMainItemID(), &errorPath );
+        ignore_unused( sheetList.GetItem( marker->GetRCItem()->GetMainItemID(), &errorPath ) );
 
         if( errorPath.LastScreen() )
             errorPath.LastScreen()->Append( marker );
diff --git a/gerbview/rs274x.cpp b/gerbview/rs274x.cpp
index 7069ef9149..dc47923c6e 100644
--- a/gerbview/rs274x.cpp
+++ b/gerbview/rs274x.cpp
@@ -31,6 +31,7 @@
 
 #include <gerbview.h>
 #include <gerber_file_image.h>
+#include <ignore.h>
 #include <macros.h>
 #include <X2_gerber_attributes.h>
 #include <gbr_metadata.h>
@@ -897,7 +898,7 @@ bool GERBER_FILE_IMAGE::ExecuteRS274XCommand( int aCommand, char* aBuff,
         break;
     }
 
-    (void) seq_len;     // quiet g++, or delete the unused variable.
+    ignore_unused( seq_len );
 
     ok = GetEndOfBlock( aBuff, aBuffSize, aText, m_Current_File );
 
diff --git a/include/ignore.h b/include/ignore.h
new file mode 100644
index 0000000000..7598216a8a
--- /dev/null
+++ b/include/ignore.h
@@ -0,0 +1,24 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2021 KiCad Developers, see CHANGELOG.TXT for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-3.0.html
+ * or you may search the http://www.gnu.org website for the version 3 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+template<class T> void ignore_unused( const T& ) { }
diff --git a/pcbnew/kicad_clipboard.cpp b/pcbnew/kicad_clipboard.cpp
index 58d4755939..722e30b603 100644
--- a/pcbnew/kicad_clipboard.cpp
+++ b/pcbnew/kicad_clipboard.cpp
@@ -27,6 +27,7 @@
 
 #include <build_version.h>
 #include <board.h>
+#include <ignore.h>
 #include <pad.h>
 #include <pcb_group.h>
 #include <pcb_shape.h>
@@ -294,7 +295,7 @@ void CLIPBOARD_IO::SaveSelection( const PCB_SELECTION& aSelected, bool isFootpri
     {
         wxTextDataObject data;
         clipboard->GetData( data );
-        ( void )data.GetText(); // Keep unused variable
+        ignore_unused( data.GetText() );
     }
     #endif
 }
@@ -373,7 +374,7 @@ void CLIPBOARD_IO::Save( const wxString& aFileName, BOARD* aBoard,
     {
         wxTextDataObject data;
         clipboard->GetData( data );
-        ( void )data.GetText(); // Keep unused variable
+        ignore_unused( data.GetText() );
     }
 }
 
diff --git a/pcbnew/load_select_footprint.cpp b/pcbnew/load_select_footprint.cpp
index d893c1d729..9fb1dc912b 100644
--- a/pcbnew/load_select_footprint.cpp
+++ b/pcbnew/load_select_footprint.cpp
@@ -38,6 +38,7 @@ using namespace std::placeholders;
 #include <footprint_tree_pane.h>
 #include <footprint_viewer_frame.h>
 #include <fp_lib_table.h>
+#include <ignore.h>
 #include <io_mgr.h>
 #include <string_utils.h>
 #include <kiway.h>
@@ -201,8 +202,7 @@ wxString PCB_BASE_FRAME::SelectFootprintFromLibBrowser()
     viewer = (FOOTPRINT_VIEWER_FRAME*) Kiway().Player( FRAME_FOOTPRINT_VIEWER_MODAL, true, this );
 
     wxString    fpid;
-    int ret = viewer->ShowModal( &fpid, this );
-    (void) ret;     // make static analyser quiet
+    ignore_unused( viewer->ShowModal( &fpid, this ) );
 
     viewer->Destroy();
 
diff --git a/pcbnew/plugin.cpp b/pcbnew/plugin.cpp
index c5a9b7eaad..2a20574718 100644
--- a/pcbnew/plugin.cpp
+++ b/pcbnew/plugin.cpp
@@ -72,10 +72,8 @@ void PLUGIN::FootprintEnumerate( wxArrayString& aFootprintNames, const wxString&
 }
 
 
-void PLUGIN::PrefetchLib( const wxString& aLibraryPath, const PROPERTIES* aProperties )
+void PLUGIN::PrefetchLib( const wxString&, const PROPERTIES* )
 {
-    (void) aLibraryPath;
-    (void) aProperties;
 }
 
 
diff --git a/pcbnew/plugins/kicad/pcb_parser.cpp b/pcbnew/plugins/kicad/pcb_parser.cpp
index e1336a3dd0..0d03b77863 100644
--- a/pcbnew/plugins/kicad/pcb_parser.cpp
+++ b/pcbnew/plugins/kicad/pcb_parser.cpp
@@ -43,6 +43,7 @@
 #include <footprint.h>
 #include <geometry/shape_line_chain.h>
 
+#include <ignore.h>
 #include <netclass.h>
 #include <pad.h>
 #include <pcb_track.h>
@@ -5078,7 +5079,7 @@ ZONE* PCB_PARSER::parseZONE( BOARD_ITEM_CONTAINER* aParent )
                     break;
 
                 case T_arc_segments:
-                    static_cast<void>( parseInt( "arc segment count" ) );
+                    ignore_unused( parseInt( "arc segment count" ) );
                     NeedRIGHT();
                     break;
 
diff --git a/pcbnew/plugins/legacy/legacy_plugin.cpp b/pcbnew/plugins/legacy/legacy_plugin.cpp
index 5fcf32c52b..9af1eda3cf 100644
--- a/pcbnew/plugins/legacy/legacy_plugin.cpp
+++ b/pcbnew/plugins/legacy/legacy_plugin.cpp
@@ -74,6 +74,7 @@
 #include <board.h>
 #include <board_design_settings.h>
 #include <footprint.h>
+#include <ignore.h>
 #include <pad.h>
 #include <pcb_track.h>
 #include <pcb_text.h>
@@ -459,7 +460,7 @@ BOARD* LEGACY_PLUGIN::Load( const wxString& aFileName, BOARD* aAppendToMe,
 
     loadAllSections( bool( aAppendToMe ) );
 
-    (void)boardDeleter.release(); // give it up so we dont delete it on exit
+    ignore_unused( boardDeleter.release() ); // give it up so we dont delete it on exit
     m_progressReporter = nullptr;
     return m_board;
 }
@@ -1876,7 +1877,7 @@ void LEGACY_PLUGIN::loadPCB_LINE()
                     dseg->SetLayer( leg_layer2new( m_cu_count,  layer ) );
                     break;
                 case 1:
-                    (void)intParse( data );
+                    ignore_unused( intParse( data ) );
                     break;
                 case 2:
                     double angle;
@@ -2397,7 +2398,7 @@ void LEGACY_PLUGIN::loadZONE_CONTAINER()
         else if( TESTLINE( "ZAux" ) )       // aux info found
         {
             // e.g. "ZAux 7 E"
-            int     ignore = intParse( line + SZ( "ZAux" ), &data );
+            ignore_unused( intParse( line + SZ( "ZAux" ), &data ) );
             char*   hopt   = strtok_r( (char*) data, delims, (char**) &data );
 
             if( !hopt )
@@ -2418,8 +2419,6 @@ void LEGACY_PLUGIN::loadZONE_CONTAINER()
                 THROW_IO_ERROR( m_error );
             }
 
-            (void) ignore;
-
             // Set hatch mode later, after reading corner outline data
         }
         else if( TESTLINE( "ZSmoothing" ) )
@@ -2473,7 +2472,7 @@ void LEGACY_PLUGIN::loadZONE_CONTAINER()
         {
             // e.g. "ZOptions 0 32 F 200 200"
             int     fillmode    = intParse( line + SZ( "ZOptions" ), &data );
-            static_cast<void>( intParse( data, &data ) ); // Ignored
+            ignore_unused( intParse( data, &data ) );
             char    fillstate   = data[1];      // here e.g. " F"
             BIU     thermalReliefGap = biuParse( data += 2 , &data );  // +=2 for " F"
             BIU     thermalReliefCopperBridge = biuParse( data );
@@ -2686,7 +2685,7 @@ void LEGACY_PLUGIN::loadDIMENSION()
         }
         else if( TESTLINE( "Sb" ) )
         {
-            int ignore     = biuParse( line + SZ( "Sb" ), &data );
+            ignore_unused( biuParse( line + SZ( "Sb" ), &data ) );
             BIU crossBarOx = biuParse( data, &data );
             BIU crossBarOy = biuParse( data, &data );
             BIU crossBarFx = biuParse( data, &data );
@@ -2696,74 +2695,60 @@ void LEGACY_PLUGIN::loadDIMENSION()
             dim->SetLineThickness( width );
             dim->UpdateHeight( wxPoint( crossBarFx, crossBarFy ),
                                wxPoint( crossBarOx, crossBarOy ) );
-            (void) ignore;
         }
         else if( TESTLINE( "Sd" ) )
         {
-            int ignore         = intParse( line + SZ( "Sd" ), &data );
+            ignore_unused( intParse( line + SZ( "Sd" ), &data ) );
             BIU featureLineDOx = biuParse( data, &data );
             BIU featureLineDOy = biuParse( data, &data );
-            BIU featureLineDFx = biuParse( data, &data );
-            BIU featureLineDFy = biuParse( data );
+
+            ignore_unused( biuParse( data, &data ) );
+            ignore_unused( biuParse( data ) );
 
             dim->SetStart( wxPoint( featureLineDOx, featureLineDOy ) );
-            ( void )ignore;
-            ( void )featureLineDFx;
-            ( void )featureLineDFy;
         }
         else if( TESTLINE( "Sg" ) )
         {
-            int ignore         = intParse( line + SZ( "Sg" ), &data );
+            ignore_unused( intParse( line + SZ( "Sg" ), &data ) );
             BIU featureLineGOx = biuParse( data, &data );
             BIU featureLineGOy = biuParse( data, &data );
-            BIU featureLineGFx = biuParse( data, &data );
-            BIU featureLineGFy = biuParse( data );
 
-            (void) ignore;
+            ignore_unused( biuParse( data, &data ) );
+            ignore_unused( biuParse( data ) );
+
             dim->SetEnd( wxPoint( featureLineGOx, featureLineGOy ) );
-            ( void )ignore;
-            ( void )featureLineGFx;
-            ( void )featureLineGFy;
         }
         else if( TESTLINE( "S1" ) )        // Arrow: no longer imported
         {
-            int ignore      = intParse( line + SZ( "S1" ), &data );
+            ignore_unused( intParse( line + SZ( "S1" ), &data ) );
             biuParse( data, &data );    // skipping excessive data
             biuParse( data, &data );    // skipping excessive data
             biuParse( data, &data );
             biuParse( data );
-
-            (void) ignore;
         }
         else if( TESTLINE( "S2" ) )        // Arrow: no longer imported
         {
-            int ignore    = intParse( line + SZ( "S2" ), &data );
+            ignore_unused( intParse( line + SZ( "S2" ), &data ) );
             biuParse( data, &data );    // skipping excessive data
             biuParse( data, &data );    // skipping excessive data
             biuParse( data, &data );
             biuParse( data, &data );
-
-            (void) ignore;
         }
         else if( TESTLINE( "S3" ) )        // Arrow: no longer imported
         {
-            int ignore    = intParse( line + SZ( "S3" ), &data );
+            ignore_unused( intParse( line + SZ( "S3" ), &data ) );
             biuParse( data, &data );    // skipping excessive data
             biuParse( data, &data );    // skipping excessive data
             biuParse( data, &data );
             biuParse( data, &data );
-
-            (void) ignore;
         }
         else if( TESTLINE( "S4" ) )        // Arrow: no longer imported
         {
-            int ignore    = intParse( line + SZ( "S4" ), &data );
+            ignore_unused( intParse( line + SZ( "S4" ), &data ) );
             biuParse( data, &data );    // skipping excessive data
             biuParse( data, &data );    // skipping excessive data
             biuParse( data, &data );
             biuParse( data, &data );
-
-            (void) ignore;
         }
     }
 
diff --git a/pcbnew/python/scripting/pcbnew_scripting_helpers.cpp b/pcbnew/python/scripting/pcbnew_scripting_helpers.cpp
index 6ebd0bb69f..f2b29fcb08 100644
--- a/pcbnew/python/scripting/pcbnew_scripting_helpers.cpp
+++ b/pcbnew/python/scripting/pcbnew_scripting_helpers.cpp
@@ -40,6 +40,7 @@
 #include <drc/drc_engine.h>
 #include <drc/drc_item.h>
 #include <fp_lib_table.h>
+#include <ignore.h>
 #include <io_mgr.h>
 #include <string_utils.h>
 #include <macros.h>
@@ -99,7 +100,7 @@ SETTINGS_MANAGER* GetSettingsManager()
         else
         {
             // Ensure wx system settings stuff is available
-            static_cast<void>( wxTheApp );
+            ignore_unused( wxTheApp );
             s_SettingsManager = new SETTINGS_MANAGER( true );
         }
     }
diff --git a/qa/eeschema/test_eagle_plugin.cpp b/qa/eeschema/test_eagle_plugin.cpp
index 2459d4b96b..d6cb73c3a2 100644
--- a/qa/eeschema/test_eagle_plugin.cpp
+++ b/qa/eeschema/test_eagle_plugin.cpp
@@ -24,6 +24,7 @@
 
 #include <qa_utils/wx_utils/unit_test_utils.h>
 
+#include <ignore.h>
 #include <kiway.h>
 #include <sch_io_mgr.h>
 
@@ -64,7 +65,7 @@ BOOST_AUTO_TEST_CASE( Load )
 
     BOOST_TEST_MESSAGE( fn.GetFullPath() );
 
-    (void) pi;
+    ignore_unused( pi );
     // This doesn't work with a null KiWay.
     // const SCH_SHEET* sheet = pi->Load( fn.GetFullPath(), nullptr );
     // BOOST_CHECK_NE( nullptr, sheet );
diff --git a/qa/eeschema/test_sch_rtree.cpp b/qa/eeschema/test_sch_rtree.cpp
index d7c625eb75..f138fe5fa0 100644
--- a/qa/eeschema/test_sch_rtree.cpp
+++ b/qa/eeschema/test_sch_rtree.cpp
@@ -27,6 +27,7 @@
  */
 
 #include <convert_to_biu.h>
+#include <ignore.h>
 #include <sch_junction.h>
 #include <sch_no_connect.h>
 #include <qa_utils/wx_utils/unit_test_utils.h>
@@ -65,7 +66,7 @@ BOOST_AUTO_TEST_CASE( Default )
     int count = 0;
     for( auto item : m_tree )
     {
-        static_cast<void>( item );
+        ignore_unused( item );
         count++;
     }
 
@@ -76,7 +77,7 @@ BOOST_AUTO_TEST_CASE( Default )
         count = 0;
         for( auto item : m_tree.OfType( KICAD_T( type ) ) )
         {
-            static_cast<void>( item );
+            ignore_unused( item );
             count++;
         }
 
@@ -90,7 +91,7 @@ BOOST_AUTO_TEST_CASE( Default )
         count = 0;
         for( auto item : m_tree.Overlapping( SCH_JUNCTION_T, bbox ) )
         {
-            static_cast<void>( item );
+            ignore_unused( item );
             count++;
         }
 
@@ -111,7 +112,7 @@ BOOST_AUTO_TEST_CASE( Junctions )
 
     for( auto item : m_tree.OfType( SCH_JUNCTION_T ) )
     {
-        static_cast<void>( item );
+        ignore_unused( item );
         count++;
     }
 
@@ -120,7 +121,7 @@ BOOST_AUTO_TEST_CASE( Junctions )
     count = 0;
     for( auto item : m_tree.OfType( SCH_NO_CONNECT_T ) )
     {
-        static_cast<void>( item );
+        ignore_unused( item );
         count++;
     }
 
@@ -199,7 +200,7 @@ BOOST_AUTO_TEST_CASE( MixedElements )
 
     for( auto item : m_tree.OfType( SCH_JUNCTION_T ) )
     {
-        static_cast<void>( item );
+        ignore_unused( item );
         count++;
     }
 
@@ -208,7 +209,7 @@ BOOST_AUTO_TEST_CASE( MixedElements )
     count = 0;
     for( auto item : m_tree.OfType( SCH_NO_CONNECT_T ) )
     {
-        static_cast<void>( item );
+        ignore_unused( item );
         count++;
     }
 
@@ -261,7 +262,7 @@ BOOST_AUTO_TEST_CASE( SingleElementTree )
 
     for( auto item : m_tree.OfType( SCH_JUNCTION_T ) )
     {
-        static_cast<void>( item );
+        ignore_unused( item );
         count++;
     }
 
@@ -270,7 +271,7 @@ BOOST_AUTO_TEST_CASE( SingleElementTree )
     count = 0;
     for( auto item : m_tree.OfType( SCH_NO_CONNECT_T ) )
     {
-        static_cast<void>( item );
+        ignore_unused( item );
         count++;
     }
 
diff --git a/qa/pcbnew_tools/tools/polygon_triangulation/polygon_triangulation.cpp b/qa/pcbnew_tools/tools/polygon_triangulation/polygon_triangulation.cpp
index 79c07f6d63..a2cbcd5fc8 100644
--- a/qa/pcbnew_tools/tools/polygon_triangulation/polygon_triangulation.cpp
+++ b/qa/pcbnew_tools/tools/polygon_triangulation/polygon_triangulation.cpp
@@ -32,6 +32,7 @@
 #include <qa_utils/utility_registry.h>
 
 #include <board.h>
+#include <ignore.h>
 #include <zone.h>
 #include <profile.h>
 
@@ -242,7 +243,7 @@ int polygon_triangulation_main( int argc, char *argv[] )
 
                     poly.CacheTriangulation();
 
-                    (void) poly;
+                    ignore_unused( poly );
 #if 0
                 PROF_COUNTER unfrac("unfrac");
                 poly.Unfracture( SHAPE_POLY_SET::PM_FAST );