diff --git a/.travis.sh b/.travis.sh
index 24aff9368..75f00ec60 100755
--- a/.travis.sh
+++ b/.travis.sh
@@ -5,8 +5,7 @@
 #
 # License see LICENSE file
 #
-function generate()
-{
+function generate() {
     OPTIONS="-DASSIMP_WERROR=ON"
 
     if [ "$DISABLE_EXPORTERS" = "YES" ] ; then
diff --git a/code/3DSExporter.cpp b/code/3DSExporter.cpp
index 642f7dc57..7b937d878 100644
--- a/code/3DSExporter.cpp
+++ b/code/3DSExporter.cpp
@@ -151,7 +151,7 @@ namespace {
 
 // ------------------------------------------------------------------------------------------------
 // Worker function for exporting a scene to 3DS. Prototyped and registered in Exporter.cpp
-void ExportScene3DS(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
+void ExportScene3DS(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/)
 {
     std::shared_ptr<IOStream> outfile (pIOSystem->Open(pFile, "wb"));
     if(!outfile) {
diff --git a/code/AMFImporter_Postprocess.cpp b/code/AMFImporter_Postprocess.cpp
index 789a11eb8..0e639026c 100644
--- a/code/AMFImporter_Postprocess.cpp
+++ b/code/AMFImporter_Postprocess.cpp
@@ -60,7 +60,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 namespace Assimp
 {
 
-aiColor4D AMFImporter::SPP_Material::GetColor(const float pX, const float pY, const float pZ) const
+aiColor4D AMFImporter::SPP_Material::GetColor(const float /*pX*/, const float /*pY*/, const float /*pZ*/) const
 {
     aiColor4D tcol;
 
diff --git a/code/AssbinExporter.cpp b/code/AssbinExporter.cpp
index a6fbcd8f7..6bee6d6d1 100644
--- a/code/AssbinExporter.cpp
+++ b/code/AssbinExporter.cpp
@@ -810,7 +810,7 @@ inline size_t WriteArray(IOStream * stream, const T* in, unsigned int size)
         }
     };
 
-void ExportSceneAssbin(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
+void ExportSceneAssbin(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/)
 {
     AssbinExport exporter;
     exporter.WriteBinaryDump( pFile, pIOSystem, pScene );
diff --git a/code/AssbinLoader.cpp b/code/AssbinLoader.cpp
index f418638e1..a7044c119 100644
--- a/code/AssbinLoader.cpp
+++ b/code/AssbinLoader.cpp
@@ -200,6 +200,7 @@ template <typename T> void ReadBounds( IOStream * stream, T* /*p*/, unsigned int
 
 void AssbinImporter::ReadBinaryNode( IOStream * stream, aiNode** node, aiNode* parent ) {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AINODE);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
@@ -274,6 +275,7 @@ void AssbinImporter::ReadBinaryNode( IOStream * stream, aiNode** node, aiNode* p
 void AssbinImporter::ReadBinaryBone( IOStream * stream, aiBone* b )
 {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AIBONE);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
@@ -298,6 +300,7 @@ void AssbinImporter::ReadBinaryBone( IOStream * stream, aiBone* b )
 void AssbinImporter::ReadBinaryMesh( IOStream * stream, aiMesh* mesh )
 {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AIMESH);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
@@ -423,6 +426,7 @@ void AssbinImporter::ReadBinaryMesh( IOStream * stream, aiMesh* mesh )
 void AssbinImporter::ReadBinaryMaterialProperty(IOStream * stream, aiMaterialProperty* prop)
 {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AIMATERIALPROPERTY);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
@@ -440,6 +444,7 @@ void AssbinImporter::ReadBinaryMaterialProperty(IOStream * stream, aiMaterialPro
 void AssbinImporter::ReadBinaryMaterial(IOStream * stream, aiMaterial* mat)
 {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AIMATERIAL);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
@@ -462,6 +467,7 @@ void AssbinImporter::ReadBinaryMaterial(IOStream * stream, aiMaterial* mat)
 void AssbinImporter::ReadBinaryNodeAnim(IOStream * stream, aiNodeAnim* nd)
 {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AINODEANIM);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
@@ -511,6 +517,7 @@ void AssbinImporter::ReadBinaryNodeAnim(IOStream * stream, aiNodeAnim* nd)
 void AssbinImporter::ReadBinaryAnim( IOStream * stream, aiAnimation* anim )
 {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AIANIMATION);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
@@ -532,6 +539,7 @@ void AssbinImporter::ReadBinaryAnim( IOStream * stream, aiAnimation* anim )
 void AssbinImporter::ReadBinaryTexture(IOStream * stream, aiTexture* tex)
 {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AITEXTURE);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
@@ -556,6 +564,7 @@ void AssbinImporter::ReadBinaryTexture(IOStream * stream, aiTexture* tex)
 void AssbinImporter::ReadBinaryLight( IOStream * stream, aiLight* l )
 {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AILIGHT);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
@@ -583,6 +592,7 @@ void AssbinImporter::ReadBinaryLight( IOStream * stream, aiLight* l )
 void AssbinImporter::ReadBinaryCamera( IOStream * stream, aiCamera* cam )
 {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AICAMERA);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
@@ -599,6 +609,7 @@ void AssbinImporter::ReadBinaryCamera( IOStream * stream, aiCamera* cam )
 void AssbinImporter::ReadBinaryScene( IOStream * stream, aiScene* scene )
 {
     uint32_t chunkID = Read<uint32_t>(stream);
+    (void)(chunkID);
     ai_assert(chunkID == ASSBIN_CHUNK_AISCENE);
     /*uint32_t size =*/ Read<uint32_t>(stream);
 
diff --git a/code/AssxmlExporter.cpp b/code/AssxmlExporter.cpp
index 8019232c0..90ed66701 100644
--- a/code/AssxmlExporter.cpp
+++ b/code/AssxmlExporter.cpp
@@ -631,7 +631,7 @@ void WriteDump(const aiScene* scene, IOStream* io, bool shortened) {
 
 } // end of namespace AssxmlExport
 
-void ExportSceneAssxml(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
+void ExportSceneAssxml(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/)
 {
     IOStream * out = pIOSystem->Open( pFile, "wt" );
     if (!out) return;
diff --git a/code/BlenderIntermediate.h b/code/BlenderIntermediate.h
index 0fc9cdafc..c6f9cba1e 100644
--- a/code/BlenderIntermediate.h
+++ b/code/BlenderIntermediate.h
@@ -110,7 +110,7 @@ namespace Blender {
         void operator= (const TempArray&)  {
         }
 
-        TempArray(const TempArray& arr) {
+        TempArray(const TempArray& /*arr*/) {
         }
 
     private:
diff --git a/code/ColladaExporter.cpp b/code/ColladaExporter.cpp
index 53ee07388..d886a2143 100644
--- a/code/ColladaExporter.cpp
+++ b/code/ColladaExporter.cpp
@@ -68,7 +68,7 @@ namespace Assimp
 
 // ------------------------------------------------------------------------------------------------
 // Worker function for exporting a scene to Collada. Prototyped and registered in Exporter.cpp
-void ExportSceneCollada(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
+void ExportSceneCollada(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/)
 {
     std::string path = DefaultIOSystem::absolutePath(std::string(pFile));
     std::string file = DefaultIOSystem::completeBaseName(std::string(pFile));
diff --git a/code/ColladaParser.cpp b/code/ColladaParser.cpp
index 7b6592351..5ff581b91 100644
--- a/code/ColladaParser.cpp
+++ b/code/ColladaParser.cpp
@@ -2469,8 +2469,7 @@ void ColladaParser::CopyVertex(size_t currentVertex, size_t numOffsets, size_t n
     size_t baseOffset = currentPrimitive * numOffsets * numPoints + currentVertex * numOffsets;
 
     // don't overrun the boundaries of the index list
-    size_t maxIndexRequested = baseOffset + numOffsets - 1;
-    ai_assert(maxIndexRequested < indices.size());
+    ai_assert((baseOffset + numOffsets - 1) < indices.size());
 
     // extract per-vertex channels using the global per-vertex offset
     for (std::vector<InputChannel>::iterator it = pMesh->mPerVertexData.begin(); it != pMesh->mPerVertexData.end(); ++it)
diff --git a/code/D3MFImporter.cpp b/code/D3MFImporter.cpp
index e97e22859..6d61a0669 100644
--- a/code/D3MFImporter.cpp
+++ b/code/D3MFImporter.cpp
@@ -344,7 +344,7 @@ bool D3MFImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool
     return false;
 }
 
-void D3MFImporter::SetupProperties(const Importer *pImp)
+void D3MFImporter::SetupProperties(const Importer */*pImp*/)
 {
 
 }
diff --git a/code/D3MFOpcPackage.cpp b/code/D3MFOpcPackage.cpp
index b6b1ba170..03c39a29d 100644
--- a/code/D3MFOpcPackage.cpp
+++ b/code/D3MFOpcPackage.cpp
@@ -379,6 +379,7 @@ IOStream *D3MFZipArchive::Open(const char* pFile, const char* /*pMode*/) {
 // ------------------------------------------------------------------------------------------------
 //  Close a filestream.
 void D3MFZipArchive::Close(IOStream *pFile) {
+    (void)(pFile);
     ai_assert(pFile != NULL);
 
     // We don't do anything in case the file would be opened again in the future
diff --git a/code/Exporter.cpp b/code/Exporter.cpp
index 1e2d7cbf1..b83a540b9 100644
--- a/code/Exporter.cpp
+++ b/code/Exporter.cpp
@@ -241,7 +241,7 @@ bool Exporter::IsDefaultIOHandler() const {
 
 // ------------------------------------------------------------------------------------------------
 const aiExportDataBlob* Exporter::ExportToBlob( const aiScene* pScene, const char* pFormatId,
-                                                unsigned int, const ExportProperties* pProperties ) {
+                                                unsigned int, const ExportProperties* /*pProperties*/ ) {
     if (pimpl->blob) {
         delete pimpl->blob;
         pimpl->blob = NULL;
diff --git a/code/FBXConverter.cpp b/code/FBXConverter.cpp
index 1a80fa4f5..a1121cc40 100644
--- a/code/FBXConverter.cpp
+++ b/code/FBXConverter.cpp
@@ -2429,6 +2429,7 @@ void Converter::ConvertAnimationStack( const AnimationStack& st )
     anim->mTicksPerSecond = anim_fps;
 }
 
+#ifdef ASSIMP_BUILD_DEBUG
 // ------------------------------------------------------------------------------------------------
 // sanity check whether the input is ok
 static void validateAnimCurveNodes( const std::vector<const AnimationCurveNode*>& curves,
@@ -2446,6 +2447,7 @@ static void validateAnimCurveNodes( const std::vector<const AnimationCurveNode*>
         }
     }
 }
+#endif // ASSIMP_BUILD_DEBUG
 
 // ------------------------------------------------------------------------------------------------
 void Converter::GenerateNodeAnimations( std::vector<aiNodeAnim*>& node_anims,
diff --git a/code/FBXParser.cpp b/code/FBXParser.cpp
index b5661caf8..d4d06567b 100644
--- a/code/FBXParser.cpp
+++ b/code/FBXParser.cpp
@@ -103,6 +103,7 @@ namespace {
     T SafeParse(const char* data, const char* end) {
         // Actual size validation happens during Tokenization so
         // this is valid as an assertion.
+        (void)(end);
         ai_assert(static_cast<size_t>(end - data) >= sizeof(T));
         T result = static_cast<T>(0);
         ::memcpy(&result, data, sizeof(T));
diff --git a/code/FIReader.cpp b/code/FIReader.cpp
index 95b22a1b8..fdf6b8a83 100755
--- a/code/FIReader.cpp
+++ b/code/FIReader.cpp
@@ -1776,17 +1776,17 @@ public:
         return reader->getParserFormat();
     }
 
-    virtual std::shared_ptr<const FIValue> getAttributeEncodedValue(int idx) const /*override*/ {
+    virtual std::shared_ptr<const FIValue> getAttributeEncodedValue(int /*idx*/) const /*override*/ {
         return nullptr;
     }
 
-    virtual std::shared_ptr<const FIValue> getAttributeEncodedValue(const char* name) const /*override*/ {
+    virtual std::shared_ptr<const FIValue> getAttributeEncodedValue(const char* /*name*/) const /*override*/ {
         return nullptr;
     }
 
-    virtual void registerDecoder(const std::string &algorithmUri, std::unique_ptr<FIDecoder> decoder) /*override*/ {}
+    virtual void registerDecoder(const std::string &/*algorithmUri*/, std::unique_ptr<FIDecoder> /*decoder*/) /*override*/ {}
 
-    virtual void registerVocabulary(const std::string &vocabularyUri, const FIVocabulary *vocabulary) /*override*/ {}
+    virtual void registerVocabulary(const std::string &/*vocabularyUri*/, const FIVocabulary */*vocabulary*/) /*override*/ {}
 
 private:
 
diff --git a/code/FindInvalidDataProcess.cpp b/code/FindInvalidDataProcess.cpp
index a6cb037b2..0113e4c5b 100644
--- a/code/FindInvalidDataProcess.cpp
+++ b/code/FindInvalidDataProcess.cpp
@@ -169,8 +169,8 @@ void FindInvalidDataProcess::Execute( aiScene* pScene)
 
 // ------------------------------------------------------------------------------------------------
 template <typename T>
-inline const char* ValidateArrayContents(const T* arr, unsigned int size,
-    const std::vector<bool>& dirtyMask, bool mayBeIdentical = false, bool mayBeZero = true)
+inline const char* ValidateArrayContents(const T* /*arr*/, unsigned int /*size*/,
+    const std::vector<bool>& /*dirtyMask*/, bool /*mayBeIdentical = false*/, bool /*mayBeZero = true*/)
 {
     return NULL;
 }
diff --git a/code/IFCCurve.cpp b/code/IFCCurve.cpp
index 4a8026551..2aa3ef6a4 100644
--- a/code/IFCCurve.cpp
+++ b/code/IFCCurve.cpp
@@ -513,6 +513,7 @@ IfcFloat Curve::GetParametricRangeDelta() const {
 
 // ------------------------------------------------------------------------------------------------
 size_t Curve::EstimateSampleCount(IfcFloat a, IfcFloat b) const {
+    (void)(a); (void)(b);  
     ai_assert( InRange( a ) );
     ai_assert( InRange( b ) );
 
diff --git a/code/IFCReaderGen1.cpp b/code/IFCReaderGen1.cpp
index d334e8322..bd526d454 100644
--- a/code/IFCReaderGen1.cpp
+++ b/code/IFCReaderGen1.cpp
@@ -1045,7 +1045,7 @@ void IFC::GetSchema(EXPRESS::ConversionSchema& out)
 namespace STEP {
 
 // -----------------------------------------------------------------------------------------------------------
-template <> size_t GenericFill<NotImplemented>(const STEP::DB& db, const LIST& params, NotImplemented* in)
+template <> size_t GenericFill<NotImplemented>(const STEP::DB& /*db*/, const LIST& /*params*/, NotImplemented* /*in*/)
 {
 	return 0;
 }
@@ -1253,7 +1253,7 @@ template <> size_t GenericFill<IfcPerformanceHistory>(const DB& db, const LIST&
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
-template <> size_t GenericFill<IfcRepresentationItem>(const DB& db, const LIST& params, IfcRepresentationItem* in)
+template <> size_t GenericFill<IfcRepresentationItem>(const DB& /*db*/, const LIST& /*params*/, IfcRepresentationItem* /*in*/)
 {
 	size_t base = 0;
 	return base;
@@ -1715,7 +1715,7 @@ template <> size_t GenericFill<IfcPlateType>(const DB& db, const LIST& params, I
 	return base;
 }
 // -----------------------------------------------------------------------------------------------------------
-template <> size_t GenericFill<IfcObjectPlacement>(const DB& db, const LIST& params, IfcObjectPlacement* in)
+template <> size_t GenericFill<IfcObjectPlacement>(const DB& /*db*/, const LIST& /*params*/, IfcObjectPlacement* /*in*/)
 {
 	size_t base = 0;
 	return base;
diff --git a/code/IRRLoader.cpp b/code/IRRLoader.cpp
index 8cc4acaad..5113ab70d 100644
--- a/code/IRRLoader.cpp
+++ b/code/IRRLoader.cpp
@@ -394,7 +394,7 @@ void IRRImporter::ComputeAnimations(Node* root, aiNode* real, std::vector<aiNode
                 angles[1] %= 360;
                 angles[2] %= 360;
 
-                if ((angles[0]*angles[1]) && (angles[1]*angles[2]))
+                if ( bool(angles[0]*angles[1]) && bool(angles[1]*angles[2]) )
                 {
                     FindSuitableMultiple(angles[0]);
                     FindSuitableMultiple(angles[1]);
diff --git a/code/MMDImporter.cpp b/code/MMDImporter.cpp
index c40978c0e..cf7c87c8a 100644
--- a/code/MMDImporter.cpp
+++ b/code/MMDImporter.cpp
@@ -107,7 +107,7 @@ const aiImporterDesc *MMDImporter::GetInfo() const { return &desc; }
 // ------------------------------------------------------------------------------------------------
 //  MMD import implementation
 void MMDImporter::InternReadFile(const std::string &file, aiScene *pScene,
-                                 IOSystem *pIOHandler) {
+                                 IOSystem */*pIOHandler*/) {
   // Read file by istream
   std::filebuf fb;
   if (!fb.open(file, std::ios::in | std::ios::binary)) {
diff --git a/code/MMDPmxParser.cpp b/code/MMDPmxParser.cpp
index 3af23529a..5be370f26 100644
--- a/code/MMDPmxParser.cpp
+++ b/code/MMDPmxParser.cpp
@@ -471,7 +471,7 @@ namespace pmx
 		stream->read((char*) &this->is_near, sizeof(uint8_t));
 	}
 
-	void PmxSoftBody::Read(std::istream *stream, PmxSetting *setting)
+    void PmxSoftBody::Read(std::istream */*stream*/, PmxSetting */*setting*/)
 	{
 		// 未実装
 		std::cerr << "Not Implemented Exception" << std::endl;
diff --git a/code/MMDVmdParser.h b/code/MMDVmdParser.h
index 778ee1161..43e7a923a 100644
--- a/code/MMDVmdParser.h
+++ b/code/MMDVmdParser.h
@@ -302,7 +302,7 @@ namespace vmd
 			return result;
 		}
 
-		bool SaveToFile(const std::u16string& filename)
+        bool SaveToFile(const std::u16string& /*filename*/)
 		{
 			// TODO: How to adapt u16string to string?
 			/*
diff --git a/code/ObjExporter.cpp b/code/ObjExporter.cpp
index 692eac0e6..3da002080 100644
--- a/code/ObjExporter.cpp
+++ b/code/ObjExporter.cpp
@@ -58,7 +58,7 @@ namespace Assimp {
 
 // ------------------------------------------------------------------------------------------------
 // Worker function for exporting a scene to Wavefront OBJ. Prototyped and registered in Exporter.cpp
-void ExportSceneObj(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties) {
+void ExportSceneObj(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/) {
     // invoke the exporter
     ObjExporter exporter(pFile, pScene);
 
@@ -94,7 +94,7 @@ ObjExporter::ObjExporter(const char* _filename, const aiScene* pScene)
 , vp()
 , vn()
 , vt()
-, vc() 
+, vc()
 , mVpMap()
 , mVnMap()
 , mVtMap()
@@ -193,7 +193,7 @@ void ObjExporter::WriteMaterialFile()
         if(AI_SUCCESS == mat->Get(AI_MATKEY_COLOR_TRANSPARENT,c)) {
             mOutputMat << "Tf " << c.r << " " << c.g << " " << c.b << endl;
         }
-        
+
         ai_real o;
         if(AI_SUCCESS == mat->Get(AI_MATKEY_OPACITY,o)) {
             mOutputMat << "d " << o << endl;
@@ -341,7 +341,7 @@ int ObjExporter::colIndexMap::getIndex( const aiColor4D& col ) {
     colMap[ col ] = mNextIndex;
     int ret = mNextIndex;
     mNextIndex++;
-    
+
     return ret;
 }
 
diff --git a/code/OpenGEXExporter.cpp b/code/OpenGEXExporter.cpp
index ea3c770ec..b3597656b 100644
--- a/code/OpenGEXExporter.cpp
+++ b/code/OpenGEXExporter.cpp
@@ -51,7 +51,7 @@ OpenGEXExporter::OpenGEXExporter() {
 OpenGEXExporter::~OpenGEXExporter() {
 }
 
-bool OpenGEXExporter::exportScene( const char *filename, const aiScene* pScene ) {
+bool OpenGEXExporter::exportScene( const char */*filename*/, const aiScene* /*pScene*/ ) {
     return true;
 }
 
diff --git a/code/OpenGEXImporter.cpp b/code/OpenGEXImporter.cpp
index 47e3e3e8c..27d7b3e49 100644
--- a/code/OpenGEXImporter.cpp
+++ b/code/OpenGEXImporter.cpp
@@ -431,7 +431,7 @@ void OpenGEXImporter::handleNodes( DDLNode *node, aiScene *pScene ) {
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleMetricNode( DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleMetricNode( DDLNode *node, aiScene */*pScene*/ ) {
     if( nullptr == node || nullptr == m_ctx ) {
         return;
     }
@@ -467,7 +467,7 @@ void OpenGEXImporter::handleMetricNode( DDLNode *node, aiScene *pScene ) {
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleNameNode( DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleNameNode( DDLNode *node, aiScene */*pScene*/ ) {
     if( nullptr == m_currentNode ) {
         throw DeadlyImportError( "No current node for name." );
         return;
@@ -512,7 +512,7 @@ static void getRefNames( DDLNode *node, std::vector<std::string> &names ) {
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleObjectRefNode( DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleObjectRefNode( DDLNode *node, aiScene */*pScene*/ ) {
     if( nullptr == m_currentNode ) {
         throw DeadlyImportError( "No parent node for name." );
         return;
@@ -536,7 +536,7 @@ void OpenGEXImporter::handleObjectRefNode( DDLNode *node, aiScene *pScene ) {
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleMaterialRefNode( ODDLParser::DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleMaterialRefNode( ODDLParser::DDLNode *node, aiScene */*pScene*/ ) {
     if( nullptr == m_currentNode ) {
         throw DeadlyImportError( "No parent node for name." );
         return;
@@ -674,7 +674,7 @@ static void setMatrix( aiNode *node, DataArrayList *transformData ) {
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleTransformNode( ODDLParser::DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleTransformNode( ODDLParser::DDLNode *node, aiScene */*pScene*/ ) {
     if( nullptr == m_currentNode ) {
         throw DeadlyImportError( "No parent node for name." );
         return;
@@ -819,7 +819,7 @@ static void copyColor4DArray( size_t numItems, DataArrayList *vaList, aiColor4D
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleVertexArrayNode( ODDLParser::DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleVertexArrayNode( ODDLParser::DDLNode *node, aiScene */*pScene*/ ) {
     if( nullptr == node ) {
         throw DeadlyImportError( "No parent node for name." );
         return;
@@ -862,7 +862,7 @@ void OpenGEXImporter::handleVertexArrayNode( ODDLParser::DDLNode *node, aiScene
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleIndexArrayNode( ODDLParser::DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleIndexArrayNode( ODDLParser::DDLNode *node, aiScene */*pScene*/ ) {
     if( nullptr == node ) {
         throw DeadlyImportError( "No parent node for name." );
         return;
@@ -1001,7 +1001,7 @@ void OpenGEXImporter::handleMaterialNode( ODDLParser::DDLNode *node, aiScene *pS
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleColorNode( ODDLParser::DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleColorNode( ODDLParser::DDLNode *node, aiScene */*pScene*/ ) {
     if( nullptr == node ) {
         return;
     }
@@ -1040,7 +1040,7 @@ void OpenGEXImporter::handleColorNode( ODDLParser::DDLNode *node, aiScene *pScen
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleTextureNode( ODDLParser::DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleTextureNode( ODDLParser::DDLNode *node, aiScene */*pScene*/ ) {
     if( nullptr == node ) {
         return;
     }
@@ -1074,7 +1074,7 @@ void OpenGEXImporter::handleTextureNode( ODDLParser::DDLNode *node, aiScene *pSc
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleParamNode( ODDLParser::DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleParamNode( ODDLParser::DDLNode *node, aiScene */*pScene*/ ) {
     if ( nullptr == node ) {
         return;
     }
@@ -1103,7 +1103,7 @@ void OpenGEXImporter::handleParamNode( ODDLParser::DDLNode *node, aiScene *pScen
 }
 
 //------------------------------------------------------------------------------------------------
-void OpenGEXImporter::handleAttenNode( ODDLParser::DDLNode *node, aiScene *pScene ) {
+void OpenGEXImporter::handleAttenNode( ODDLParser::DDLNode *node, aiScene */*pScene*/ ) {
     if ( nullptr == node ) {
         return;
     }
diff --git a/code/PlyExporter.cpp b/code/PlyExporter.cpp
index eb0867046..b20c2b328 100644
--- a/code/PlyExporter.cpp
+++ b/code/PlyExporter.cpp
@@ -65,7 +65,7 @@ template<> const char* type_of(double&) { return "double"; }
 
 // ------------------------------------------------------------------------------------------------
 // Worker function for exporting a scene to PLY. Prototyped and registered in Exporter.cpp
-void ExportScenePly(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
+void ExportScenePly(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/)
 {
     // invoke the exporter
     PlyExporter exporter(pFile, pScene);
@@ -83,7 +83,7 @@ void ExportScenePly(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene
     outfile->Write( exporter.mOutput.str().c_str(), static_cast<size_t>(exporter.mOutput.tellp()),1);
 }
 
-void ExportScenePlyBinary(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
+void ExportScenePlyBinary(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/)
 {
     // invoke the exporter
     PlyExporter exporter(pFile, pScene, true);
diff --git a/code/Q3BSPZipArchive.cpp b/code/Q3BSPZipArchive.cpp
index 7428c04c3..86c966d8e 100644
--- a/code/Q3BSPZipArchive.cpp
+++ b/code/Q3BSPZipArchive.cpp
@@ -255,6 +255,7 @@ IOStream *Q3BSPZipArchive::Open(const char* pFile, const char* /*pMode*/) {
 // ------------------------------------------------------------------------------------------------
 //  Close a filestream.
 void Q3BSPZipArchive::Close(IOStream *pFile) {
+    (void)(pFile);
     ai_assert(pFile != NULL);
 
     // We don't do anything in case the file would be opened again in the future
diff --git a/code/SIBImporter.cpp b/code/SIBImporter.cpp
index bdda3c677..e85c9bdcb 100644
--- a/code/SIBImporter.cpp
+++ b/code/SIBImporter.cpp
@@ -163,7 +163,7 @@ static aiColor3D ReadColor(StreamReaderLE* stream)
     return aiColor3D(r, g, b);
 }
 
-static void UnknownChunk(StreamReaderLE* stream, const SIBChunk& chunk)
+static void UnknownChunk(StreamReaderLE* /*stream*/, const SIBChunk& chunk)
 {
     char temp[5] = {
         static_cast<char>(( chunk.Tag>>24 ) & 0xff),
diff --git a/code/STLExporter.cpp b/code/STLExporter.cpp
index f94debfc9..60b5d8bf3 100644
--- a/code/STLExporter.cpp
+++ b/code/STLExporter.cpp
@@ -57,7 +57,7 @@ namespace Assimp    {
 
 // ------------------------------------------------------------------------------------------------
 // Worker function for exporting a scene to Stereolithograpy. Prototyped and registered in Exporter.cpp
-void ExportSceneSTL(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
+void ExportSceneSTL(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/)
 {
     // invoke the exporter
     STLExporter exporter(pFile, pScene);
@@ -74,7 +74,7 @@ void ExportSceneSTL(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene
 
     outfile->Write( exporter.mOutput.str().c_str(), static_cast<size_t>(exporter.mOutput.tellp()),1);
 }
-void ExportSceneSTLBinary(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
+void ExportSceneSTLBinary(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/)
 {
     // invoke the exporter
     STLExporter exporter(pFile, pScene, true);
diff --git a/code/X3DExporter.cpp b/code/X3DExporter.cpp
index 31a391c47..df688fd79 100644
--- a/code/X3DExporter.cpp
+++ b/code/X3DExporter.cpp
@@ -692,7 +692,7 @@ bool found = false;
 	return true;
 }
 
-X3DExporter::X3DExporter(const char* pFileName, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties)
+X3DExporter::X3DExporter(const char* pFileName, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/)
 	: mScene(pScene)
 {
 list<SAttribute> attr_list;
diff --git a/code/X3DImporter_Metadata.cpp b/code/X3DImporter_Metadata.cpp
index 9d7147aea..0fa1b27b3 100644
--- a/code/X3DImporter_Metadata.cpp
+++ b/code/X3DImporter_Metadata.cpp
@@ -105,7 +105,7 @@ bool X3DImporter::ParseHelper_CheckRead_X3DMetadataObject()
 	return true;
 }
 
-void X3DImporter::ParseNode_Metadata(CX3DImporter_NodeElement* pParentElement, const std::string& pNodeName)
+void X3DImporter::ParseNode_Metadata(CX3DImporter_NodeElement* pParentElement, const std::string& /*pNodeName*/)
 {
 	ParseHelper_Node_Enter(pParentElement);
 	MACRO_NODECHECK_METADATA(mReader->getNodeName());
diff --git a/code/glTF2Asset.h b/code/glTF2Asset.h
index a98fe5ab2..e252eb871 100644
--- a/code/glTF2Asset.h
+++ b/code/glTF2Asset.h
@@ -403,7 +403,7 @@ namespace glTF2
         virtual ~Object() {}
 
         //! Maps special IDs to another ID, where needed. Subclasses may override it (statically)
-        static const char* TranslateId(Asset& r, const char* id)
+        static const char* TranslateId(Asset& /*r*/, const char* id)
             { return id; }
     };
 
diff --git a/code/glTF2Asset.inl b/code/glTF2Asset.inl
index 8b50fa1d3..041e73223 100644
--- a/code/glTF2Asset.inl
+++ b/code/glTF2Asset.inl
@@ -288,7 +288,7 @@ inline Buffer::~Buffer()
 	for(SEncodedRegion* reg : EncodedRegion_List) delete reg;
 }
 
-inline const char* Buffer::TranslateId(Asset& r, const char* id)
+inline const char* Buffer::TranslateId(Asset& /*r*/, const char* id)
 {
     return id;
 }
@@ -623,7 +623,7 @@ inline Image::Image()
 
 }
 
-inline void Image::Read(Value& obj, Asset& r)
+inline void Image::Read(Value& obj, Asset& /*r*/)
 {
     if (!mDataLength) {
         if (Value* uri = FindString(obj, "uri")) {
@@ -668,7 +668,7 @@ inline void Image::SetData(uint8_t* data, size_t length, Asset& r)
     }
 }
 
-inline void Sampler::Read(Value& obj, Asset& r)
+inline void Sampler::Read(Value& obj, Asset& /*r*/)
 {
     SetDefaults();
 
@@ -886,7 +886,7 @@ inline void Mesh::Read(Value& pJSON_Object, Asset& pAsset_Root)
     }
 }
 
-inline void Camera::Read(Value& obj, Asset& r)
+inline void Camera::Read(Value& obj, Asset& /*r*/)
 {
     type = MemberOrDefault(obj, "type", Camera::Perspective);
 
@@ -1087,7 +1087,7 @@ inline void Asset::ReadExtensionsUsed(Document& doc)
     #undef CHECK_EXT
 }
 
-inline IOStream* Asset::OpenFile(std::string path, const char* mode, bool absolute)
+inline IOStream* Asset::OpenFile(std::string path, const char* mode, bool /*absolute*/)
 {
     #ifdef ASSIMP_API
         return mIOSystem->Open(path, mode);
diff --git a/code/glTF2AssetWriter.inl b/code/glTF2AssetWriter.inl
index df28cb681..8583462ce 100644
--- a/code/glTF2AssetWriter.inl
+++ b/code/glTF2AssetWriter.inl
@@ -72,7 +72,7 @@ namespace glTF2 {
             return val;
         }
 
-        inline Value& MakeValue(Value& val, float r, MemoryPoolAllocator<>& al) {
+        inline Value& MakeValue(Value& val, float r, MemoryPoolAllocator<>& /*al*/) {
             val.SetDouble(r);
 
             return val;
@@ -171,7 +171,7 @@ namespace glTF2 {
         obj.AddMember("target", int(bv.target), w.mAl);
     }
 
-    inline void Write(Value& obj, Camera& c, AssetWriter& w)
+    inline void Write(Value& /*obj*/, Camera& /*c*/, AssetWriter& /*w*/)
     {
 
     }
@@ -432,7 +432,7 @@ namespace glTF2 {
         }
     }
 
-    inline void Write(Value& obj, Program& b, AssetWriter& w)
+    inline void Write(Value& /*obj*/, Program& /*b*/, AssetWriter& /*w*/)
     {
 
     }
@@ -465,7 +465,7 @@ namespace glTF2 {
         AddRefsVector(scene, "nodes", s.nodes, w.mAl);
     }
 
-    inline void Write(Value& obj, Shader& b, AssetWriter& w)
+    inline void Write(Value& /*obj*/, Shader& /*b*/, AssetWriter& /*w*/)
     {
 
     }
diff --git a/code/glTF2Exporter.cpp b/code/glTF2Exporter.cpp
index d8cff897c..cd6ca4630 100644
--- a/code/glTF2Exporter.cpp
+++ b/code/glTF2Exporter.cpp
@@ -80,7 +80,7 @@ namespace Assimp {
 } // end of namespace Assimp
 
 glTF2Exporter::glTF2Exporter(const char* filename, IOSystem* pIOSystem, const aiScene* pScene,
-                           const ExportProperties* pProperties, bool isBinary)
+                           const ExportProperties* pProperties, bool /*isBinary*/)
     : mFilename(filename)
     , mIOSystem(pIOSystem)
     , mProperties(pProperties)
diff --git a/code/glTF2Importer.cpp b/code/glTF2Importer.cpp
index 292e0eeb2..5d40d75bc 100644
--- a/code/glTF2Importer.cpp
+++ b/code/glTF2Importer.cpp
@@ -159,21 +159,21 @@ static void CopyValue(const glTF2::mat4& v, aiMatrix4x4& o)
     o.a4 = v[12]; o.b4 = v[13]; o.c4 = v[14]; o.d4 = v[15];
 }
 
-inline void SetMaterialColorProperty(Asset& r, vec4& prop, aiMaterial* mat, const char* pKey, unsigned int type, unsigned int idx)
+inline void SetMaterialColorProperty(Asset& /*r*/, vec4& prop, aiMaterial* mat, const char* pKey, unsigned int type, unsigned int idx)
 {
     aiColor4D col;
     CopyValue(prop, col);
     mat->AddProperty(&col, 1, pKey, type, idx);
 }
 
-inline void SetMaterialColorProperty(Asset& r, vec3& prop, aiMaterial* mat, const char* pKey, unsigned int type, unsigned int idx)
+inline void SetMaterialColorProperty(Asset& /*r*/, vec3& prop, aiMaterial* mat, const char* pKey, unsigned int type, unsigned int idx)
 {
     aiColor4D col;
     CopyValue(prop, col);
     mat->AddProperty(&col, 1, pKey, type, idx);
 }
 
-inline void SetMaterialTextureProperty(std::vector<int>& embeddedTexIdxs, Asset& r, glTF2::TextureInfo prop, aiMaterial* mat, aiTextureType texType, unsigned int texSlot = 0)
+inline void SetMaterialTextureProperty(std::vector<int>& embeddedTexIdxs, Asset& /*r*/, glTF2::TextureInfo prop, aiMaterial* mat, aiTextureType texType, unsigned int texSlot = 0)
 {
     if (prop.texture && prop.texture->source) {
         aiString uri(prop.texture->source->uri);
@@ -296,6 +296,7 @@ static inline void SetFace(aiFace& face, int a, int b, int c)
     face.mIndices[2] = c;
 }
 
+#ifdef ASSIMP_BUILD_DEBUG
 static inline bool CheckValidFacesIndices(aiFace* faces, unsigned nFaces, unsigned nVerts)
 {
     for (unsigned i = 0; i < nFaces; ++i) {
@@ -307,6 +308,7 @@ static inline bool CheckValidFacesIndices(aiFace* faces, unsigned nFaces, unsign
     }
     return true;
 }
+#endif // ASSIMP_BUILD_DEBUG
 
 void glTF2Importer::ImportMeshes(glTF2::Asset& r)
 {
diff --git a/code/glTFAsset.h b/code/glTFAsset.h
index e018e5ace..0c3de16a5 100644
--- a/code/glTFAsset.h
+++ b/code/glTFAsset.h
@@ -393,7 +393,7 @@ namespace glTF
         virtual ~Object() {}
 
         //! Maps special IDs to another ID, where needed. Subclasses may override it (statically)
-        static const char* TranslateId(Asset& r, const char* id)
+        static const char* TranslateId(Asset& /*r*/, const char* id)
             { return id; }
     };
 
diff --git a/code/glTFAsset.inl b/code/glTFAsset.inl
index 61afebfb4..6d328614e 100644
--- a/code/glTFAsset.inl
+++ b/code/glTFAsset.inl
@@ -675,7 +675,7 @@ inline void Image::SetData(uint8_t* data, size_t length, Asset& r)
     }
 }
 
-inline void Sampler::Read(Value& obj, Asset& r)
+inline void Sampler::Read(Value& obj, Asset& /*r*/)
 {
     SetDefaults();
 
@@ -1093,7 +1093,7 @@ Ref<Buffer> buf = pAsset_Root.buffers.Get(pCompression_Open3DGC.Buffer);
 }
 #endif
 
-inline void Camera::Read(Value& obj, Asset& r)
+inline void Camera::Read(Value& obj, Asset& /*r*/)
 {
     type = MemberOrDefault(obj, "type", Camera::Perspective);
 
@@ -1116,7 +1116,7 @@ inline void Camera::Read(Value& obj, Asset& r)
     }
 }
 
-inline void Light::Read(Value& obj, Asset& r)
+inline void Light::Read(Value& obj, Asset& /*r*/)
 {
     SetDefaults();
 
@@ -1414,7 +1414,7 @@ inline void Asset::ReadExtensionsUsed(Document& doc)
     #undef CHECK_EXT
 }
 
-inline IOStream* Asset::OpenFile(std::string path, const char* mode, bool absolute)
+inline IOStream* Asset::OpenFile(std::string path, const char* mode, bool /*absolute*/)
 {
     #ifdef ASSIMP_API
         return mIOSystem->Open(path, mode);
diff --git a/code/glTFAssetWriter.inl b/code/glTFAssetWriter.inl
index 698f0ba8f..485abc4f6 100644
--- a/code/glTFAssetWriter.inl
+++ b/code/glTFAssetWriter.inl
@@ -187,7 +187,7 @@ namespace glTF {
         obj.AddMember("target", int(bv.target), w.mAl);
     }
 
-    inline void Write(Value& obj, Camera& c, AssetWriter& w)
+    inline void Write(Value& /*obj*/, Camera& /*c*/, AssetWriter& /*w*/)
     {
 
     }
@@ -398,7 +398,7 @@ namespace glTF {
         }
     }
 
-    inline void Write(Value& obj, Program& b, AssetWriter& w)
+    inline void Write(Value& /*obj*/, Program& /*b*/, AssetWriter& /*w*/)
     {
 
     }
@@ -424,7 +424,7 @@ namespace glTF {
         AddRefsVector(scene, "nodes", s.nodes, w.mAl);
     }
 
-    inline void Write(Value& obj, Shader& b, AssetWriter& w)
+    inline void Write(Value& /*obj*/, Shader& /*b*/, AssetWriter& /*w*/)
     {
 
     }
@@ -452,7 +452,7 @@ namespace glTF {
 
     }
 
-    inline void Write(Value& obj, Technique& b, AssetWriter& w)
+    inline void Write(Value& /*obj*/, Technique& /*b*/, AssetWriter& /*w*/)
     {
 
     }
@@ -467,7 +467,7 @@ namespace glTF {
         }
     }
 
-    inline void Write(Value& obj, Light& b, AssetWriter& w)
+    inline void Write(Value& /*obj*/, Light& /*b*/, AssetWriter& /*w*/)
     {
 
     }
diff --git a/code/glTFImporter.cpp b/code/glTFImporter.cpp
index a1d8e0cd0..5d1b5afab 100644
--- a/code/glTFImporter.cpp
+++ b/code/glTFImporter.cpp
@@ -154,7 +154,7 @@ static void CopyValue(const glTF::mat4& v, aiMatrix4x4& o)
     o.a4 = v[12]; o.b4 = v[13]; o.c4 = v[14]; o.d4 = v[15];
 }
 
-inline void SetMaterialColorProperty(std::vector<int>& embeddedTexIdxs, Asset& r, glTF::TexProperty prop, aiMaterial* mat,
+inline void SetMaterialColorProperty(std::vector<int>& embeddedTexIdxs, Asset& /*r*/, glTF::TexProperty prop, aiMaterial* mat,
     aiTextureType texType, const char* pKey, unsigned int type, unsigned int idx)
 {
     if (prop.texture) {
@@ -234,6 +234,7 @@ static inline void SetFace(aiFace& face, int a, int b, int c)
     face.mIndices[2] = c;
 }
 
+#ifdef ASSIMP_BUILD_DEBUG
 static inline bool CheckValidFacesIndices(aiFace* faces, unsigned nFaces, unsigned nVerts)
 {
     for (unsigned i = 0; i < nFaces; ++i) {
@@ -245,6 +246,7 @@ static inline bool CheckValidFacesIndices(aiFace* faces, unsigned nFaces, unsign
     }
     return true;
 }
+#endif // ASSIMP_BUILD_DEBUG
 
 void glTFImporter::ImportMeshes(glTF::Asset& r)
 {
diff --git a/contrib/Open3DGC/o3dgcTriangleListEncoder.inl b/contrib/Open3DGC/o3dgcTriangleListEncoder.inl
index d499f6dc9..017dd86bf 100644
--- a/contrib/Open3DGC/o3dgcTriangleListEncoder.inl
+++ b/contrib/Open3DGC/o3dgcTriangleListEncoder.inl
@@ -125,7 +125,7 @@ namespace o3dgc
         }
         return true;
     }
-    inline bool IsCase6(long degree, long numIndices, const long * const ops, const long * const indices)
+    inline bool IsCase6(long degree, long numIndices, const long * const ops, const long * const /*indices*/)
     {
         // ops: 0000000 indices: 
         if (numIndices!= 0) 
diff --git a/contrib/openddlparser/code/DDLNode.cpp b/contrib/openddlparser/code/DDLNode.cpp
index 6548cdf24..a7c557fc5 100644
--- a/contrib/openddlparser/code/DDLNode.cpp
+++ b/contrib/openddlparser/code/DDLNode.cpp
@@ -191,7 +191,7 @@ Reference *DDLNode::getReferences() const {
     return m_references;
 }
 
-void DDLNode::dump(IOStreamBase &stream) {
+void DDLNode::dump(IOStreamBase &/*stream*/) {
     // Todo!    
 }
 
diff --git a/contrib/openddlparser/code/Value.cpp b/contrib/openddlparser/code/Value.cpp
index 3c8b06a10..b5a35e722 100644
--- a/contrib/openddlparser/code/Value.cpp
+++ b/contrib/openddlparser/code/Value.cpp
@@ -294,7 +294,7 @@ Reference *Value::getRef() const {
     return (Reference*) m_data;
 }
 
-void Value::dump( IOStreamBase &stream ) {
+void Value::dump( IOStreamBase &/*stream*/ ) {
     switch( m_type ) {
         case ddl_none:
             std::cout << "None" << std::endl;
diff --git a/contrib/openddlparser/include/openddlparser/OpenDDLParser.h b/contrib/openddlparser/include/openddlparser/OpenDDLParser.h
index e9ac665b5..cdf6f7288 100644
--- a/contrib/openddlparser/include/openddlparser/OpenDDLParser.h
+++ b/contrib/openddlparser/include/openddlparser/OpenDDLParser.h
@@ -41,7 +41,7 @@ struct Property;
 
 template<class T>
 inline
-bool isEmbeddedCommentOpenTag( T *in, T *end ) {
+bool isEmbeddedCommentOpenTag( T *in, T */*end*/ ) {
     if ( in == '/' && in+1 == '*' ) {
         return true;
     }
diff --git a/include/assimp/Exporter.hpp b/include/assimp/Exporter.hpp
index 2c141ded2..c6a6f684a 100644
--- a/include/assimp/Exporter.hpp
+++ b/include/assimp/Exporter.hpp
@@ -171,7 +171,7 @@ public:
     *   Any IO handlers set via #SetIOHandler are ignored here.
     * @note Use aiCopyScene() to get a modifiable copy of a previously
     *   imported scene. */
-    const aiExportDataBlob* ExportToBlob(  const aiScene* pScene, const char* pFormatId, unsigned int pPreprocessing = 0u, const ExportProperties* pProperties = NULL);
+    const aiExportDataBlob* ExportToBlob(const aiScene* pScene, const char* pFormatId, unsigned int pPreprocessing = 0u, const ExportProperties* = NULL);
     const aiExportDataBlob* ExportToBlob(  const aiScene* pScene, const std::string& pFormatId, unsigned int pPreprocessing = 0u, const ExportProperties* pProperties = NULL);
 
     // -------------------------------------------------------------------