suppress -Woverloaded-virtual warnings from smesh

src/Mod/Fem/CMakeLists.txt

@@ -3,6 +3,11 @@ if(BUILD_FEM_VTK)
     add_definitions(-DFC_USE_VTK)
 endif(BUILD_FEM_VTK)
 
+# suppress warnings from smesh
+if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANGXX)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-overloaded-virtual")
+endif()
+
 add_subdirectory(App)
 
 if(BUILD_GUI)

src/Mod/MeshPart/App/Mesher.cpp

@@ -38,6 +38,10 @@
 #include <Standard_Version.hxx>
 
 #ifdef HAVE_SMESH
+#if defined(__clang__)
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Woverloaded-virtual"
+#endif
 #include <SMESH_Gen.hxx>
 #include <StdMeshers_MaxLength.hxx>
 #include <StdMeshers_LocalLength.hxx>
@@ -59,6 +63,9 @@
 #include <NETGENPlugin_Hypothesis_2D.hxx>
 #include <NETGENPlugin_SimpleHypothesis_2D.hxx>
 #endif // HAVE_NETGEN
+#if defined(__clang__)
+# pragma clang diagnostic pop
+#endif
 #endif // HAVE_SMESH
 
 using namespace MeshPart;

src/Mod/Path/libarea/PythonStuff.cpp

@@ -25,7 +25,7 @@
 #include <Python.h>
 #endif
 
-#if defined(__GNUG__) && !defined(__APPLE__)
+#if defined(__GNUG__) && !defined(__clang__)
 #pragma implementation
 #endif