Remove warnings.

Author: csukuangfj

modules/hdf/samples/create_read_write_datasets.cpp

@@ -13,6 +13,14 @@
  *
  */
 
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#  if defined __clang__ || defined __APPLE__
+#    pragma GCC diagnostic ignored "-Wmissing-prototypes"
+#    pragma GCC diagnostic ignored "-Wextra"
+#  endif
+#endif
+
 //! [tutorial]
 #include <iostream>