Roll HarfBuzz to 1.3.0

third_party/harfbuzz-ng/src/hb-private.hh

 /*
  * Copyright © 2007,2008,2009  Red Hat, Inc.
  * Copyright © 2011,2012  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
  * above copyright notice and the following two paragraphs appear in
@@ skipping 65 matching lines @@
 
 #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
 #define _HB_BOOLEAN_EXPR(expr) ((expr) ? 1 : 0)
 #define likely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 1))
 #define unlikely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 0))
 #else
 #define likely(expr) (expr)
 #define unlikely(expr) (expr)
 #endif
 
-#ifndef __GNUC__
+#if !defined(__GNUC__) && !defined(__clang__)
 #undef __attribute__
 #define __attribute__(x)
 #endif
 
 #if __GNUC__ >= 3
 #define HB_PURE_FUNC    __attribute__((pure))
 #define HB_CONST_FUNC   __attribute__((const))
 #define HB_PRINTF_FUNC(format_idx, arg_idx) __attribute__((__format__ (__printf__, format_idx, arg_idx)))
 #else
 #define HB_PURE_FUNC
@@ skipping 915 matching lines @@
   if (unlikely (!_hb_options.i))
     _hb_options_init ();
 
   return _hb_options.opts;
 }
 
 /* Size signifying variable-sized array */
 #define VAR 1
 
 #endif /* HB_PRIVATE_HH */