diff --git a/src/3rdParty/salomesmesh/CMakeLists.txt b/src/3rdParty/salomesmesh/CMakeLists.txt
index a7f917f33..1214a2574 100644
--- a/src/3rdParty/salomesmesh/CMakeLists.txt
+++ b/src/3rdParty/salomesmesh/CMakeLists.txt
@@ -8,6 +8,8 @@ SET(SMESH_VERSION_TWEAK 2)
 
 if(CMAKE_COMPILER_IS_GNUCXX)
     set(CMAKE_CXX_FLAGS " ${CMAKE_CXX_FLAGS} -Wno-sign-compare -Wno-reorder -Wno-switch -Wno-unused-variable -Wno-unused-but-set-variable -Wno-comment")
+elseif(CMAKE_COMPILER_IS_CLANGXX)
+    set(CMAKE_CXX_FLAGS " ${CMAKE_CXX_FLAGS} -Wno-sign-compare -Wno-reorder -Wno-switch -Wno-unused-variable -Wno-unused-private-field -Wno-unused-function -Wno-sometimes-uninitialized -Wno-overloaded-virtual -Wno-dynamic-class-memaccess -Wno-comment")
 endif()
 
 if(CMAKE_COMPILER_IS_CLANGXX)
diff --git a/src/Gui/WidgetFactory.cpp b/src/Gui/WidgetFactory.cpp
index b58ddae52..1b22eb993 100644
--- a/src/Gui/WidgetFactory.cpp
+++ b/src/Gui/WidgetFactory.cpp
@@ -135,12 +135,12 @@ PythonWrapper::PythonWrapper()
 
 bool PythonWrapper::toCString(const Py::Object& pyobject, std::string& str)
 {
-    if (PyUnicode_Check(pyobject.ptr())) {
+    if (PyUnicode_Check(pyobject.ptr())) {
         PyObject* unicode = PyUnicode_AsUTF8String(pyobject.ptr());
         str = PyString_AsString(unicode);
         Py_DECREF(unicode);
-        return true;
-    }
+        return true;
+    }
     else if (PyString_Check(pyobject.ptr())) {
         str = PyString_AsString(pyobject.ptr());
         return true;
@@ -243,34 +243,34 @@ bool PythonWrapper::loadGuiModule()
 #endif
     return true;
 }
-
-void PythonWrapper::createChildrenNameAttributes(PyObject* root, QObject* object)
-{
+
+void PythonWrapper::createChildrenNameAttributes(PyObject* root, QObject* object)
+{
 #if defined (HAVE_SHIBOKEN) && defined(HAVE_PYSIDE)
-    Q_FOREACH (QObject* child, object->children()) {
-        const QByteArray name = child->objectName().toLocal8Bit();
-
-        if (!name.isEmpty() && !name.startsWith("_") && !name.startsWith("qt_")) {
-            bool hasAttr = PyObject_HasAttrString(root, name.constData());
-            if (!hasAttr) {
-                Shiboken::AutoDecRef pyChild(Shiboken::Conversions::pointerToPython((SbkObjectType*)SbkPySide_QtCoreTypes[SBK_QOBJECT_IDX], child));
-                PyObject_SetAttrString(root, name.constData(), pyChild);
-            }
-            createChildrenNameAttributes(root, child);
-        }
-        createChildrenNameAttributes(root, child);
-    }
-#endif
-}
+    Q_FOREACH (QObject* child, object->children()) {
+        const QByteArray name = child->objectName().toLocal8Bit();
+
+        if (!name.isEmpty() && !name.startsWith("_") && !name.startsWith("qt_")) {
+            bool hasAttr = PyObject_HasAttrString(root, name.constData());
+            if (!hasAttr) {
+                Shiboken::AutoDecRef pyChild(Shiboken::Conversions::pointerToPython((SbkObjectType*)SbkPySide_QtCoreTypes[SBK_QOBJECT_IDX], child));
+                PyObject_SetAttrString(root, name.constData(), pyChild);
+            }
+            createChildrenNameAttributes(root, child);
+        }
+        createChildrenNameAttributes(root, child);
+    }
+#endif
+}
 
 void PythonWrapper::setParent(PyObject* pyWdg, QObject* parent)
 {
 #if defined (HAVE_SHIBOKEN) && defined(HAVE_PYSIDE)
-    if (parent) {
-        Shiboken::AutoDecRef pyParent(Shiboken::Conversions::pointerToPython((SbkObjectType*)SbkPySide_QtGuiTypes[SBK_QWIDGET_IDX], parent));
-        Shiboken::Object::setParent(pyParent, pyWdg);
-    }
-#endif
+    if (parent) {
+        Shiboken::AutoDecRef pyParent(Shiboken::Conversions::pointerToPython((SbkObjectType*)SbkPySide_QtGuiTypes[SBK_QWIDGET_IDX], parent));
+        Shiboken::Object::setParent(pyParent, pyWdg);
+    }
+#endif
 }
 
 // ----------------------------------------------------
@@ -631,8 +631,8 @@ Py::Object UiLoaderPy::load(const Py::Tuple& args)
                 wrap.loadGuiModule();
 
                 Py::Object pyWdg = wrap.fromQWidget(widget);
-                wrap.createChildrenNameAttributes(*pyWdg, widget);
-                wrap.setParent(*pyWdg, parent);
+                wrap.createChildrenNameAttributes(*pyWdg, widget);
+                wrap.setParent(*pyWdg, parent);
                 return pyWdg;
             }
         }
@@ -1053,7 +1053,7 @@ bool PyResource::connect(const char* sender, const char* signal, PyObject* cb)
     }
 
     if (objS) {
-        SignalConnect* sc = new SignalConnect(this, cb, objS);
+        SignalConnect* sc = new SignalConnect(this, cb);
         mySingals.push_back(sc);
         return QObject::connect(objS, sigStr.toAscii(), sc, SLOT ( onExecute() )  );
     }
@@ -1267,8 +1267,8 @@ PyObject *PyResource::setValue(PyObject *args)
 
 // ----------------------------------------------------
 
-SignalConnect::SignalConnect( Base::PyObjectBase* res, PyObject* cb, QObject* sender)
-  : myResource(res), myCallback(cb), mySender(sender)
+SignalConnect::SignalConnect(Base::PyObjectBase* res, PyObject* cb)
+  : myResource(res), myCallback(cb)
 {
 }
 
diff --git a/src/Gui/WidgetFactory.h b/src/Gui/WidgetFactory.h
index fb328bca0..5d6146ead 100644
--- a/src/Gui/WidgetFactory.h
+++ b/src/Gui/WidgetFactory.h
@@ -445,7 +445,7 @@ class SignalConnect : public QObject
     Q_OBJECT
 
 public:
-    SignalConnect( Base::PyObjectBase* res, PyObject* cb, QObject* sender);
+    SignalConnect(Base::PyObjectBase* res, PyObject* cb);
     ~SignalConnect();
 
 public Q_SLOTS:
@@ -454,7 +454,6 @@ public Q_SLOTS:
 private:
     PyObject* myResource;
     PyObject* myCallback;
-    QObject*  mySender;
 };
 
 // ----------------------------------------------------
diff --git a/src/Mod/Mesh/App/WildMagic4/Wm4Matrix4.inl b/src/Mod/Mesh/App/WildMagic4/Wm4Matrix4.inl
index e4f9f3d70..34468f87a 100644
--- a/src/Mod/Mesh/App/WildMagic4/Wm4Matrix4.inl
+++ b/src/Mod/Mesh/App/WildMagic4/Wm4Matrix4.inl
@@ -600,8 +600,6 @@ Matrix4<Real>& Matrix4<Real>::operator*= (Real fScalar)
 template <class Real>
 Matrix4<Real>& Matrix4<Real>::operator/= (Real fScalar)
 {
-    int i;
-
     if (fScalar != (Real)0.0)
     {
         Real fInvScalar = ((Real)1.0)/fScalar;
diff --git a/src/Mod/Mesh/App/WildMagic4/Wm4TRational.inl b/src/Mod/Mesh/App/WildMagic4/Wm4TRational.inl
index 7209d5a68..426b9bacc 100644
--- a/src/Mod/Mesh/App/WildMagic4/Wm4TRational.inl
+++ b/src/Mod/Mesh/App/WildMagic4/Wm4TRational.inl
@@ -705,7 +705,7 @@ void TRational<N>::ConvertTo (double& rdValue) const
         return;
     }
 
-    unsigned int auiResult[2], uiSave = 0;
+    unsigned int auiResult[2];
 
     // compute the sign of the number
     int iS0 = m_kNumer.GetSign(), iS1 = m_kDenom.GetSign();