macOS: [skip ci] suppress some more Py3.8 warnings, suppress warnings about deprecated OpenGL API

cMake/FreeCAD_Helpers/CompilerChecksAndSetups.cmake

@@ -95,6 +95,7 @@ macro(CompilerChecksAndSetups)
             if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 8.0)
                 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-undefined-var-template")
             endif()
+            add_definitions(-DGL_SILENCE_DEPRECATION)
         elseif (UNIX)
             if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.9)
                 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-undefined-var-template")

src/App/FeaturePythonPyImp.h

@@ -27,6 +27,11 @@
 #include <Base/Interpreter.h>
 #include <App/PropertyContainerPy.h>
 
+#if defined(__clang__)
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
 #define PYTHON_TYPE_DEF(_class_, _subclass_) \
     class _class_ : public _subclass_ \
     { \
@@ -137,4 +142,8 @@ private:
 
 #include "FeaturePythonPyImp.inl"
 
+#if defined(__clang__)
+# pragma clang diagnostic pop
+#endif
+
 #endif // APP_FEATUREPYTHONPYIMP_H

src/Base/PyObjectBase.cpp

@@ -75,6 +75,11 @@ PyObjectBase::~PyObjectBase()
  * 0 and define tp_base as 0.
  */
 
+#if defined(__clang__)
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 PyTypeObject PyObjectBase::Type = {
     PyVarObject_HEAD_INIT(&PyType_Type,0)
     "PyObjectBase",                                         /*tp_name*/
@@ -142,6 +147,10 @@ PyTypeObject PyObjectBase::Type = {
 #endif
 };
 
+#if defined(__clang__)
+# pragma clang diagnostic pop
+#endif
+
 /*------------------------------
  * PyObjectBase Methods 	-- Every class, even the abstract one should have a Methods
 ------------------------------*/

src/Base/swigpyrun.cpp

@@ -29,6 +29,7 @@
 #if defined(__clang__)
 # pragma clang diagnostic push
 # pragma clang diagnostic ignored "-Wdeprecated-register"
+# pragma clang diagnostic ignored "-Wdeprecated-declarations"
 #elif defined (__GNUC__)
 # pragma GCC diagnostic push
 # pragma GCC diagnostic ignored "-Wmissing-field-initializers"