fix the linux build.

code/ASE/ASEParser.h

@@ -80,7 +80,18 @@ struct Material : public D3DS::Material
     }
 
     Material(const Material &other)            = default;
-    Material &operator=(const Material &other) = default;
+
+    Material &operator=(const Material &other) {
+        if (this == &other) {
+            return *this;
+        }
+
+        avSubMaterials = other.avSubMaterials;
+        pcInstance = other.pcInstance;
+        bNeed = other.bNeed;
+
+        return *this;
+    }
 
 
     //! Move constructor. This is explicitly written because MSVC doesn't support defaulting it
@@ -94,12 +105,12 @@ struct Material : public D3DS::Material
     }
 
 
-    Material &operator=(Material &&other) AI_NO_EXCEPT {
+    Material &operator=( Material &&other) AI_NO_EXCEPT {
         if (this == &other) {
             return *this;
         }
 
-        D3DS::Material::operator=(std::move(other));
+        //D3DS::Material::operator=(std::move(other));
 
         avSubMaterials = std::move(other.avSubMaterials);
         pcInstance = std::move(other.pcInstance);

code/B3D/B3DImporter.cpp

@@ -364,7 +364,7 @@ void B3DImporter::ReadVRTS(){
     int v0=static_cast<int>(_vertices.size());
     _vertices.resize( v0+n_verts );
 
-    for( int i=0;i<n_verts;++i ){
+    for( unsigned int i=0;i<n_verts;++i ){
         Vertex &v=_vertices[v0+i];
 
         memset( v.bones,0,sizeof(v.bones) );
@@ -414,7 +414,7 @@ void B3DImporter::ReadTRIS(int v0) {
 	size_t n_tris = ChunkSize() / 12;
 	aiFace *face = mesh->mFaces = new aiFace[n_tris];
 
-	for (int i = 0; i < n_tris; ++i) {
+    for (unsigned int i = 0; i < n_tris; ++i) {
 		int i0 = ReadInt() + v0;
 		int i1 = ReadInt() + v0;
 		int i2 = ReadInt() + v0;

code/Obj/ObjFileParser.cpp

@@ -59,7 +59,14 @@ namespace Assimp {
 const std::string ObjFileParser::DEFAULT_MATERIAL = AI_DEFAULT_MATERIAL_NAME;
 
 ObjFileParser::ObjFileParser() :
-        m_DataIt(), m_DataItEnd(), m_pModel(nullptr), m_uiLine(0), m_pIO(nullptr), m_progress(nullptr), m_originalObjFileName() {
+        m_DataIt(),
+        m_DataItEnd(),
+        m_pModel(nullptr),
+        m_uiLine(0),
+        m_buffer(),
+        m_pIO(nullptr),
+        m_progress(nullptr),
+        m_originalObjFileName() {
     // empty
 }
 
@@ -69,8 +76,8 @@ ObjFileParser::ObjFileParser(IOStreamBuffer<char> &streamBuffer, const std::stri
         m_DataIt(),
         m_DataItEnd(),
         m_pModel(nullptr),
-        m_buffer(),
         m_uiLine(0),
+        m_buffer(),
         m_pIO(io),
         m_progress(progress),
         m_originalObjFileName(originalObjFileName) {

code/Step/STEPFile.h

@@ -727,8 +727,11 @@ struct InternGenericConvert<Maybe<T>> {
     }
 };
 
+#ifdef _WIN32
 #pragma warning(push)
 #pragma warning(disable : 4127)
+#endif // _WIN32
+
 template <typename T, uint64_t min_cnt, uint64_t max_cnt>
 struct InternGenericConvertList {
     void operator()(ListOf<T, min_cnt, max_cnt> &out, const std::shared_ptr<const EXPRESS::DataType> &inp_base, const STEP::DB &db) {
@@ -759,8 +762,6 @@ struct InternGenericConvertList {
     }
 };
 
-#pragma warning(pop)
-
 template <typename T>
 struct InternGenericConvert<Lazy<T>> {
     void operator()(Lazy<T> &out, const std::shared_ptr<const EXPRESS::DataType> &in_base, const STEP::DB &db) {
@@ -959,7 +960,9 @@ private:
     const EXPRESS::ConversionSchema *schema;
 };
 
+#ifdef _WIN32
 #pragma warning(pop)
+#endif // _WIN32
 
 } // namespace STEP