diff --git a/contrib/src/ai/obstacleAvoidance.cxx b/contrib/src/ai/obstacleAvoidance.cxx
index faf8a1ff05..87ce79026b 100644
--- a/contrib/src/ai/obstacleAvoidance.cxx
+++ b/contrib/src/ai/obstacleAvoidance.cxx
@@ -36,7 +36,6 @@ obstacle_detection() {
   double distance = 0x7fff ;
   double expanded_radius = 0;
   LVecBase3 to_obstacle;
-  LVecBase3 prev_avoidance;
   for(unsigned int i = 0; i < _ai_char->_world->_obstacles.size(); ++i) {
     PT(BoundingVolume) bounds = _ai_char->_world->_obstacles[i].get_bounds();
     CPT(BoundingSphere) bsphere = bounds->as_bounding_sphere();
diff --git a/dtool/src/interrogatedb/py_wrappers.cxx b/dtool/src/interrogatedb/py_wrappers.cxx
index 4d56eee41a..3e8f61cb39 100644
--- a/dtool/src/interrogatedb/py_wrappers.cxx
+++ b/dtool/src/interrogatedb/py_wrappers.cxx
@@ -517,7 +517,7 @@ static PyObject *Dtool_MappingWrapper_keys(PyObject *self, PyObject *) {
     _register_collection((PyTypeObject *)&Dtool_MappingWrapper_Keys_Type, "MappingView");
   }
 
-  PyObject_INIT(keys, &Dtool_MappingWrapper_Keys_Type);
+  (void)PyObject_INIT(keys, &Dtool_MappingWrapper_Keys_Type);
   Py_XINCREF(wrap->_base._self);
   keys->_base._self = wrap->_base._self;
   keys->_base._name = wrap->_base._name;
@@ -552,7 +552,7 @@ static PyObject *Dtool_MappingWrapper_values(PyObject *self, PyObject *) {
     _register_collection((PyTypeObject *)&Dtool_MappingWrapper_Values_Type, "ValuesView");
   }
 
-  PyObject_INIT(values, &Dtool_MappingWrapper_Values_Type);
+  (void)PyObject_INIT(values, &Dtool_MappingWrapper_Values_Type);
   Py_XINCREF(wrap->_base._self);
   values->_base._self = wrap->_base._self;
   values->_base._name = wrap->_base._name;
@@ -588,7 +588,7 @@ static PyObject *Dtool_MappingWrapper_items(PyObject *self, PyObject *) {
     _register_collection((PyTypeObject *)&Dtool_MappingWrapper_Items_Type, "MappingView");
   }
 
-  PyObject_INIT(items, &Dtool_MappingWrapper_Items_Type);
+  (void)PyObject_INIT(items, &Dtool_MappingWrapper_Items_Type);
   Py_XINCREF(wrap->_base._self);
   items->_base._self = wrap->_base._self;
   items->_base._name = wrap->_base._name;
@@ -1557,7 +1557,7 @@ Dtool_SequenceWrapper *Dtool_NewSequenceWrapper(PyObject *self, const char *name
     _register_collection((PyTypeObject *)&Dtool_MutableSequenceWrapper_Type, "Sequence");
   }
 
-  PyObject_INIT(wrap, &Dtool_SequenceWrapper_Type);
+  (void)PyObject_INIT(wrap, &Dtool_SequenceWrapper_Type);
   Py_XINCREF(self);
   wrap->_base._self = self;
   wrap->_base._name = name;
@@ -1582,7 +1582,7 @@ Dtool_MutableSequenceWrapper *Dtool_NewMutableSequenceWrapper(PyObject *self, co
     _register_collection((PyTypeObject *)&Dtool_MutableSequenceWrapper_Type, "MutableSequence");
   }
 
-  PyObject_INIT(wrap, &Dtool_MutableSequenceWrapper_Type);
+  (void)PyObject_INIT(wrap, &Dtool_MutableSequenceWrapper_Type);
   Py_XINCREF(self);
   wrap->_base._self = self;
   wrap->_base._name = name;
@@ -1609,7 +1609,7 @@ Dtool_MappingWrapper *Dtool_NewMappingWrapper(PyObject *self, const char *name)
     _register_collection((PyTypeObject *)&Dtool_MappingWrapper_Type, "Mapping");
   }
 
-  PyObject_INIT(wrap, &Dtool_MappingWrapper_Type);
+  (void)PyObject_INIT(wrap, &Dtool_MappingWrapper_Type);
   Py_XINCREF(self);
   wrap->_base._self = self;
   wrap->_base._name = name;
@@ -1636,7 +1636,7 @@ Dtool_MappingWrapper *Dtool_NewMutableMappingWrapper(PyObject *self, const char
     _register_collection((PyTypeObject *)&Dtool_MutableMappingWrapper_Type, "MutableMapping");
   }
 
-  PyObject_INIT(wrap, &Dtool_MutableMappingWrapper_Type);
+  (void)PyObject_INIT(wrap, &Dtool_MutableMappingWrapper_Type);
   Py_XINCREF(self);
   wrap->_base._self = self;
   wrap->_base._name = name;
diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index 40fa055bce..4a369a6f72 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -1355,7 +1355,7 @@ def CompileCxx(obj,src,opts):
         if (optlevel==4): cmd += " -O3 -DNDEBUG"
 
         # Enable more warnings.
-        cmd += " -Wall -Wno-reorder -Wno-unused-function"
+        cmd += " -Wall -Wno-unused-function"
 
         if not src.endswith(".c"):
             cmd += " -Wno-reorder"
diff --git a/panda/src/cocoadisplay/cocoaGraphicsPipe.mm b/panda/src/cocoadisplay/cocoaGraphicsPipe.mm
index 5430373c55..dd554e2a77 100644
--- a/panda/src/cocoadisplay/cocoaGraphicsPipe.mm
+++ b/panda/src/cocoadisplay/cocoaGraphicsPipe.mm
@@ -37,7 +37,7 @@ CocoaGraphicsPipe(CGDirectDisplayID display) : _display(display) {
   _supported_types = OT_window | OT_buffer | OT_texture_buffer;
   _is_valid = true;
 
-  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+  [[NSAutoreleasePool alloc] init];
 
   // Put Cocoa into thread-safe mode by spawning a thread which immediately
   // exits.
diff --git a/panda/src/cocoadisplay/cocoaGraphicsWindow.mm b/panda/src/cocoadisplay/cocoaGraphicsWindow.mm
index 72c9d57c0f..35f71f6614 100644
--- a/panda/src/cocoadisplay/cocoaGraphicsWindow.mm
+++ b/panda/src/cocoadisplay/cocoaGraphicsWindow.mm
@@ -405,7 +405,7 @@ open_window() {
       cocoadisplay_cat.info()
         << "os_handle type " << os_handle->get_type() << "\n";
 
-      void *ptr_handle;
+      void *ptr_handle = nullptr;
 
       // Depending on whether the window handle comes from a Carbon or a Cocoa
       // application, it could be either a HIViewRef or an NSView or NSWindow.
diff --git a/panda/src/egldisplay/eglGraphicsBuffer.h b/panda/src/egldisplay/eglGraphicsBuffer.h
index 0d5d473d36..7bed62cb83 100644
--- a/panda/src/egldisplay/eglGraphicsBuffer.h
+++ b/panda/src/egldisplay/eglGraphicsBuffer.h
@@ -41,7 +41,6 @@ protected:
   virtual bool open_buffer();
 
 private:
-  X11_Display *_display;
   EGLSurface _pbuffer;
   EGLDisplay _egl_display;
 
diff --git a/panda/src/glstuff/glCgShaderContext_src.cxx b/panda/src/glstuff/glCgShaderContext_src.cxx
index 23efd27d9a..574648300b 100644
--- a/panda/src/glstuff/glCgShaderContext_src.cxx
+++ b/panda/src/glstuff/glCgShaderContext_src.cxx
@@ -1079,7 +1079,6 @@ update_shader_texture_bindings(ShaderContext *prev) {
 
   for (int i = 0; i < (int)_shader->_tex_spec.size(); ++i) {
     Shader::ShaderTexSpec &spec = _shader->_tex_spec[i];
-    const InternalName *id = spec._name;
 
     CGparameter p = _cg_parameter_map[spec._id._seqno];
     if (p == 0) {
diff --git a/panda/src/pgraphnodes/shaderGenerator.cxx b/panda/src/pgraphnodes/shaderGenerator.cxx
index 372bd89e1d..3dea5f7134 100644
--- a/panda/src/pgraphnodes/shaderGenerator.cxx
+++ b/panda/src/pgraphnodes/shaderGenerator.cxx
@@ -288,8 +288,6 @@ analyze_renderstate(ShaderKey &key, const RenderState *rs) {
     }
   }
 
-  bool normal_mapping = key._lighting && shader_attrib->auto_normal_on();
-
   // See if there is a normal map, height map, gloss map, or glow map.  Also
   // check if anything has TexGen.
 
diff --git a/panda/src/vision/openCVTexture.cxx b/panda/src/vision/openCVTexture.cxx
index 5990e77321..e0262d01ba 100644
--- a/panda/src/vision/openCVTexture.cxx
+++ b/panda/src/vision/openCVTexture.cxx
@@ -92,7 +92,7 @@ consider_update() {
  * independently of the original.
  */
 PT(Texture) OpenCVTexture::
-make_copy_impl() {
+make_copy_impl() const {
   Texture::CDReader cdata_tex(Texture::_cycler);
   PT(OpenCVTexture) copy = new OpenCVTexture(get_name());
   Texture::CDWriter cdata_copy_tex(copy->Texture::_cycler, true);
diff --git a/panda/src/vision/openCVTexture.h b/panda/src/vision/openCVTexture.h
index 7226202a7f..ce4d279456 100644
--- a/panda/src/vision/openCVTexture.h
+++ b/panda/src/vision/openCVTexture.h
@@ -41,7 +41,7 @@ public:
 
 protected:
   virtual void consider_update();
-  virtual PT(Texture) make_copy_impl();
+  virtual PT(Texture) make_copy_impl() const;
   void do_assign(Texture::CData *cdata_tex, const OpenCVTexture *copy,
                  const Texture::CData *cdata_copy_tex);