Add fallback implementation for constexpr and alignof
diff --git a/src/hb-private.hh b/src/hb-private.hh
index 5cec8e0..6893bfd 100644
--- a/src/hb-private.hh
+++ b/src/hb-private.hh
@@ -84,6 +84,10 @@
#define nullptr NULL
#endif
+#ifndef constexpr
+#define constexpr const
+#endif
+
// Static assertions
#ifndef static_assert
#define static_assert(e, msg) \
@@ -98,6 +102,20 @@
#define thread_local
#endif
+#ifndef alignof
+#define alignof(x) _hb_alignof<x>::value;
+template <typename T>
+struct _hb_alignof
+{
+ struct s
+ {
+ char c;
+ T t;
+ };
+ static constexpr unsigned int value = offsetof (s, t);
+};
+#endif // alignof
+
#endif // __cplusplus < 201103L
#if (defined(__GNUC__) || defined(__clang__)) && defined(__OPTIMIZE__)
