diff --git a/ApplicationLibCode/Application/Tools/RiaGitDiff.cpp b/ApplicationLibCode/Application/Tools/RiaGitDiff.cpp
index 332e9712f4..6df8a4ea3b 100644
--- a/ApplicationLibCode/Application/Tools/RiaGitDiff.cpp
+++ b/ApplicationLibCode/Application/Tools/RiaGitDiff.cpp
@@ -27,6 +27,10 @@
 #ifdef _MSC_VER
 #pragma warning( disable : 4996 )
 #endif
+#ifdef __GNUC__
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationLibCode/Application/Tools/RiaImageFileCompare.cpp b/ApplicationLibCode/Application/Tools/RiaImageFileCompare.cpp
index 66c86da047..d4f6766aad 100644
--- a/ApplicationLibCode/Application/Tools/RiaImageFileCompare.cpp
+++ b/ApplicationLibCode/Application/Tools/RiaImageFileCompare.cpp
@@ -23,6 +23,9 @@
 #ifdef _MSC_VER
 #pragma warning( disable : 4996 )
 #endif
+#ifdef __GNUC__
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
 
 //==================================================================================================
 //
diff --git a/ApplicationLibCode/Application/Tools/RiaTextFileCompare.cpp b/ApplicationLibCode/Application/Tools/RiaTextFileCompare.cpp
index 141af981c7..d19894ce2b 100644
--- a/ApplicationLibCode/Application/Tools/RiaTextFileCompare.cpp
+++ b/ApplicationLibCode/Application/Tools/RiaTextFileCompare.cpp
@@ -26,6 +26,9 @@
 #ifdef _MSC_VER
 #pragma warning( disable : 4996 )
 #endif
+#ifdef __GNUC__
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
 
 //--------------------------------------------------------------------------------------------------
 ///
diff --git a/ApplicationLibCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.cpp b/ApplicationLibCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.cpp
index 39f1f55ec1..d200324805 100644
--- a/ApplicationLibCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.cpp
+++ b/ApplicationLibCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.cpp
@@ -676,9 +676,6 @@ void RicWellPathExportMswCompletionsImpl::generateFishbonesMswExportInfo(
     double maxSegmentLength = enableSegmentSplitting ? mswParameters->maxSegmentLength()
                                                      : std::numeric_limits<double>::infinity();
 
-    double subStartMD  = wellPath->fishbonesCollection()->startMD();
-    double subStartTVD = RicMswTableFormatterTools::tvdFromMeasuredDepth( branch->wellPath(), subStartMD );
-
     auto unitSystem = exportInfo->unitSystem();
 
     for ( RimFishbones* subs : fishbonesSubs )
@@ -808,9 +805,6 @@ void RicWellPathExportMswCompletionsImpl::generateFishbonesMswExportInfo(
                     segmentOnParentBranch->addCompletion( std::move( icdCompletion ) );
                 }
             }
-
-            subStartMD  = subEndMD;
-            subStartTVD = subEndTVD;
         }
     }
     exportInfo->setHasSubGridIntersections( exportInfo->hasSubGridIntersections() || foundSubGridIntersections );
diff --git a/ApplicationLibCode/FileInterface/RifFileParseTools.cpp b/ApplicationLibCode/FileInterface/RifFileParseTools.cpp
index c355bb6f24..1e26e0e32e 100644
--- a/ApplicationLibCode/FileInterface/RifFileParseTools.cpp
+++ b/ApplicationLibCode/FileInterface/RifFileParseTools.cpp
@@ -22,6 +22,10 @@
 #ifdef _MSC_VER
 #pragma warning( disable : 4996 )
 #endif
+#ifdef __GNUC__
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationLibCode/FileInterface/RifRftSegment.cpp b/ApplicationLibCode/FileInterface/RifRftSegment.cpp
index 2bf2fb5244..f44c852fe3 100644
--- a/ApplicationLibCode/FileInterface/RifRftSegment.cpp
+++ b/ApplicationLibCode/FileInterface/RifRftSegment.cpp
@@ -199,7 +199,7 @@ const RifRftSegmentData* RifRftSegment::segmentData( int segmentNumber ) const
 //--------------------------------------------------------------------------------------------------
 const RifRftSegmentData* RifRftSegment::segmentDataByIndex( int segmentIndex ) const
 {
-    CVF_ASSERT( segmentIndex < m_topology.size() );
+    CVF_ASSERT( segmentIndex < static_cast<int>( m_topology.size() ) );
 
     return &( m_topology[segmentIndex] );
 }
diff --git a/ApplicationLibCode/ProjectDataModel/ProcessControl/RimProcess.cpp b/ApplicationLibCode/ProjectDataModel/ProcessControl/RimProcess.cpp
index 815ead8a87..b1f79aecd1 100644
--- a/ApplicationLibCode/ProjectDataModel/ProcessControl/RimProcess.cpp
+++ b/ApplicationLibCode/ProjectDataModel/ProcessControl/RimProcess.cpp
@@ -29,6 +29,9 @@
 #ifdef _MSC_VER
 #pragma warning( disable : 4996 )
 #endif
+#ifdef __GNUC__
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
 
 CAF_PDM_SOURCE_INIT( RimProcess, "RimProcess" );
 
@@ -146,7 +149,6 @@ bool RimProcess::execute()
     QObject::connect( proc, SIGNAL( started() ), m_monitor, SLOT( started() ) );
 
     bool retval = false;
-
     proc->start( cmd );
     if ( proc->waitForStarted( -1 ) )
     {
diff --git a/ApplicationLibCode/ReservoirDataModel/RigCaseCellResultsData.cpp b/ApplicationLibCode/ReservoirDataModel/RigCaseCellResultsData.cpp
index 39c9c88f28..322749bf67 100644
--- a/ApplicationLibCode/ReservoirDataModel/RigCaseCellResultsData.cpp
+++ b/ApplicationLibCode/ReservoirDataModel/RigCaseCellResultsData.cpp
@@ -2901,7 +2901,7 @@ void RigCaseCellResultsData::computeCompletionTypeForTimeStep( size_t timeStep )
 
     // If permeabilities are generated by calculations, make sure that generated data is calculated
     // See RicExportFractureCompletionsImpl::generateCompdatValues()
-    for ( const QString& propertyName : { "PERMX", "PERMY", "PERMZ" } )
+    for ( const QString propertyName : { "PERMX", "PERMY", "PERMZ" } )
     {
         for ( auto userCalculation : RimProject::current()->gridCalculationCollection()->calculations() )
         {
diff --git a/ApplicationLibCode/ReservoirDataModel/RigWbsParameter.h b/ApplicationLibCode/ReservoirDataModel/RigWbsParameter.h
index d0cb03c6f1..060661d757 100644
--- a/ApplicationLibCode/ReservoirDataModel/RigWbsParameter.h
+++ b/ApplicationLibCode/ReservoirDataModel/RigWbsParameter.h
@@ -99,7 +99,8 @@ private:
         SourceAddress( QString primary   = "",
                        QString secondary = "",
                        QString units     = RiaWellLogUnitTools<double>::noUnitString() )
-            : primary( primary )
+            : resType( RIG_NODAL )
+            , primary( primary )
             , secondary( secondary )
             , units( units )
         {
diff --git a/ApplicationLibCode/UserInterface/AnalysisPlots/RiuGroupedBarChartBuilder.cpp b/ApplicationLibCode/UserInterface/AnalysisPlots/RiuGroupedBarChartBuilder.cpp
index e094201924..42d9a8b81d 100644
--- a/ApplicationLibCode/UserInterface/AnalysisPlots/RiuGroupedBarChartBuilder.cpp
+++ b/ApplicationLibCode/UserInterface/AnalysisPlots/RiuGroupedBarChartBuilder.cpp
@@ -100,8 +100,7 @@ class RiuBarChartScaleDraw : public QwtScaleDraw
 public:
     struct RiuBarChartTick
     {
-        RiuBarChartTick()                             = default;
-        RiuBarChartTick( const RiuBarChartTick& rhs ) = default;
+        RiuBarChartTick() = default;
         RiuBarChartTick( QwtScaleDiv::TickType tickType, const QString& label, bool oppositeSide = false )
             : tickType( tickType )
             , label( label )
diff --git a/ApplicationLibCode/UserInterface/RiuMdiSubWindow.h b/ApplicationLibCode/UserInterface/RiuMdiSubWindow.h
index ea056737ec..4e69734269 100644
--- a/ApplicationLibCode/UserInterface/RiuMdiSubWindow.h
+++ b/ApplicationLibCode/UserInterface/RiuMdiSubWindow.h
@@ -25,7 +25,7 @@ class RiuMdiSubWindow : public QMdiSubWindow
 {
     Q_OBJECT
 public:
-    RiuMdiSubWindow( QWidget* parent = nullptr, Qt::WindowFlags flags = nullptr );
+    RiuMdiSubWindow( QWidget* parent = nullptr, Qt::WindowFlags flags = Qt::WindowFlags() );
 
     ~RiuMdiSubWindow() override;
 
diff --git a/Fwk/AppFwk/cafViewer/cafOpenGLWidget.h b/Fwk/AppFwk/cafViewer/cafOpenGLWidget.h
index 0da8fe54cc..7237990f98 100644
--- a/Fwk/AppFwk/cafViewer/cafOpenGLWidget.h
+++ b/Fwk/AppFwk/cafViewer/cafOpenGLWidget.h
@@ -58,7 +58,7 @@ public:
                   const QGLFormat&         format,
                   QWidget*                 parent,
                   OpenGLWidget*            shareWidget = nullptr,
-                  Qt::WindowFlags          f           = nullptr );
+                  Qt::WindowFlags          f           = Qt::WindowFlags() );
     OpenGLWidget( OpenGLWidget* shareWidget, QWidget* parent, Qt::WindowFlags f = Qt::WindowFlags() );
 
     cvf::OpenGLContext* cvfOpenGLContext() const;