Isolated emscripten in new lib

lib/emscripten/emtests/test_embind_5.cpp

@@ -0,0 +1,56 @@
+// Copyright 2017 The Emscripten Authors.  All rights reserved.
+// Emscripten is available under two separate licenses, the MIT license and the
+// University of Illinois/NCSA Open Source License.  Both these licenses can be
+// found in the LICENSE file.
+
+#include <emscripten.h>
+#include <emscripten/bind.h>
+
+using namespace emscripten;
+
+
+class MyFoo {
+public:
+  MyFoo() {
+    EM_ASM({out("constructing my foo");});
+  }
+  virtual void doit() {
+    EM_ASM({out("doing it");});
+  }
+};
+
+class MyBar : public MyFoo {
+public:
+  MyBar() {
+    EM_ASM({out("constructing my bar");});
+  }
+  void doit() override {
+    EM_ASM({out("doing something else");});
+  }
+};
+
+
+EMSCRIPTEN_BINDINGS(my_module) {
+  class_<MyFoo>("MyFoo")
+    .constructor<>()
+    .function("doit", &MyFoo::doit)
+    ;
+  class_<MyBar, base<MyFoo>>("MyBar")
+    .constructor<>()
+    ;
+}
+
+
+int main(int argc, char **argv) {
+  EM_ASM(
+    try {
+      var foo = new Module.MyFoo();
+      foo.doit();
+      var bar = new Module.MyBar();
+      bar.doit();
+    } catch(e) {
+      out(e);
+    }
+  );
+  return 0;
+}