Fix build on MSC + CXX11 codepath.

Bugfix for multiple texture

experimental/tinyobj_loader_opt.h

@@ -1440,7 +1440,9 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
     // std::cout << "mtllib :" << material_filename << std::endl;
 
     auto t1 = std::chrono::high_resolution_clock::now();
-
+	if (material_filename.back() == '\r') {
+			material_filename.pop_back();
+	}
     std::ifstream ifs(material_filename);
     if (ifs.good()) {
       LoadMtl(&material_map, materials, &ifs);
@@ -1516,13 +1518,13 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
     StackVector<std::thread, 16> workers;
 
     for (size_t t = 0; t < num_threads; t++) {
-      int material_id = -1;  // -1 = default unknown material.
       workers->push_back(std::thread([&, t]() {
         size_t v_count = v_offsets[t];
         size_t n_count = n_offsets[t];
         size_t t_count = t_offsets[t];
         size_t f_count = f_offsets[t];
         size_t face_count = face_offsets[t];
+		int material_id = -1;  // -1 = default unknown material.
 
         for (size_t i = 0; i < commands[t].size(); i++) {
           if (commands[t][i].type == COMMAND_EMPTY) {
@@ -1579,7 +1581,19 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
     for (size_t t = 0; t < workers->size(); t++) {
       workers[t].join();
     }
-
+	if(material_map.size()>1&& num_threads>1) {
+			for (size_t t = 0; t < num_threads; t++) {
+				size_t face_count = face_offsets[t];
+				if (-1 == attrib->material_ids[face_count]) {
+					int prev_material_id = attrib->material_ids[face_count - 1];
+					size_t max_face_offset = (t == num_threads - 1) ? attrib->material_ids.size() : face_offsets[t + 1];
+					for (int i = face_count; i<max_face_offset; ++i) {
+						if (attrib->material_ids[i] != -1) break;
+						attrib->material_ids[i] = prev_material_id;
+					}
+				}
+			}
+	}
     auto t_end = std::chrono::high_resolution_clock::now();
     ms_merge = t_end - t_start;
   }

loader_example.cc

@@ -29,6 +29,13 @@ extern "C" {
 #endif
 #endif
 
+#ifdef TINYOBJ_USE_CXX11
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++98-compat"
+#endif
+#endif
+
 class timerutil {
  public:
 #ifdef _WIN32
@@ -63,7 +70,7 @@ class timerutil {
   }
   time_t current() {
     struct timeval t;
-    gettimeofday(&t, NULL);
+    gettimeofday(&t, tobj_null);
     return static_cast<time_t>(t.tv_sec * 1000 + t.tv_usec);
   }
 
@@ -261,7 +268,7 @@ static void PrintInfo(const tinyobj::attrib_t& attrib,
   }
 }
 
-static bool TestLoadObj(const char* filename, const char* basepath = NULL,
+static bool TestLoadObj(const char* filename, const char* basepath = tobj_null,
                         bool triangulate = true) {
   std::cout << "Loading " << filename << std::endl;
 
@@ -361,7 +368,7 @@ static bool TestStreamLoadObj() {
     virtual ~MaterialStringStreamReader() {}
     virtual bool operator()(const std::string& matId,
                             std::vector<material_t>* materials,
-                            std::map<unsigned int, int>* matMap,
+                            std::map<std::string, int>* matMap,
                             std::string* err) {
       (void)matId;
       std::string warning;

tests/tester.cc

@@ -303,7 +303,7 @@ std::string matStream(
             virtual bool operator() (
               const std::string& matId,
               std::vector<material_t>* materials,
-              std::map<unsigned int, int>* matMap,
+              std::map<std::string, int>* matMap,
               std::string* err)
             {
                 (void)matId;