#if COMPILER_SUPPORTS(CXX_NULLPTR) || defined(_LIBCPP_VERSION)
-#include <cstddef>
-
// libstdc++ supports nullptr_t starting with gcc 4.6. STLport doesn't define it.
#if (defined(__GLIBCXX__) && __GLIBCXX__ < 20110325) || defined(_STLPORT_VERSION)
namespace std {
#else
+#include "wtf/WTFExport.h"
+
namespace std {
class nullptr_t {
public: