Check if "std::move" is available.

configure.ac

@@ -113,6 +113,22 @@ if eval "test x$need_strict_ansi = xyes"; then
 fi
 AC_MSG_RESULT([$need_strict_ansi])
 
+# Check if "std::move" is available
+AC_MSG_CHECKING([for std::move])
+AC_LANG_PUSH(C++)
+AC_TRY_COMPILE([
+#include <utility>
+],[
+class A {};
+A* a = new A();
+A* b = std::move(a);
+],[has_std_move=yes],[has_std_move=no]);
+AC_LANG_POP(C++)
+if eval "test x$has_std_move = xno"; then
+  AC_DEFINE(NEED_STD_MOVE_FALLBACK,1,[Define to 1 if a fallback for "std::move" is required.])
+fi
+AC_MSG_RESULT([$has_std_move])
+
 # --- machine dependent optimizations ---
 
 #AX_EXT

libde265/util.h

@@ -21,6 +21,10 @@
 #ifndef DE265_UTIL_H
 #define DE265_UTIL_H
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #ifndef _MSC_VER
 #include <inttypes.h>
 #endif
@@ -70,6 +74,19 @@
 namespace std { using namespace std::tr1; }
 #endif
 
+#ifdef NEED_STD_MOVE_FALLBACK
+// Provide fallback variant of "std::move" for older compilers with
+// incomplete/broken C++11 support.
+namespace std {
+
+template<typename _Tp>
+inline typename std::remove_reference<_Tp>::type&& move(_Tp&& __t) {
+  return static_cast<typename std::remove_reference<_Tp>::type&&>(__t);
+}
+
+}  // namespace std
+#endif
+
 #if __GNUC__ && GCC_VERSION < 40600
 // nullptr was introduced in gcc 4.6, a simple alias should be fine for our use case
 #define nullptr NULL