-// MaxAlign: max_align_t isn't supported by gcc
-#ifdef __GNUC__
-struct MaxAlign { char c; } __attribute__((aligned));
-#else /* !__GNUC__ */
-# error Cannot define MaxAlign on this platform
+// Provide our own std::__throw_* wrappers for platforms that don't have them
+#if FOLLY_HAVE_BITS_FUNCTEXCEPT_H
+#include <bits/functexcept.h>
+#else
+#include "folly/detail/FunctionalExcept.h"
+#endif
+
+#if defined(__cplusplus)
+// Unfortunately, boost::has_trivial_copy<T> is broken in libc++ due to its
+// usage of __has_trivial_copy(), so we can't use it as a
+// least-common-denominator for C++11 implementations that don't support
+// std::is_trivially_copyable<T>.
+//
+// http://stackoverflow.com/questions/12754886/has-trivial-copy-behaves-differently-in-clang-and-gcc-whos-right
+//
+// As a result, use std::is_trivially_copyable() where it exists, and fall back
+// to Boost otherwise.
+#if FOLLY_HAVE_STD__IS_TRIVIALLY_COPYABLE
+#include <type_traits>
+#define FOLLY_IS_TRIVIALLY_COPYABLE(T) (std::is_trivially_copyable<T>::value)
+#else
+#include <boost/type_traits.hpp>
+#define FOLLY_IS_TRIVIALLY_COPYABLE(T) (boost::has_trivial_copy<T>::value)