===================================================================
RCS file: /cvs/mandoc/Attic/config.h.post,v
retrieving revision 1.6.2.1
retrieving revision 1.6.2.3
diff -u -p -r1.6.2.1 -r1.6.2.3
--- mandoc/Attic/config.h.post	2013/09/29 23:28:48	1.6.2.1
+++ mandoc/Attic/config.h.post	2013/10/10 23:43:04	1.6.2.3
@@ -16,8 +16,17 @@
 #endif
 
 #ifndef HAVE_BETOH64
-#define betoh64(x) be64toh(x)
+#  if defined(__APPLE__)
+#    define betoh64(x) OSSwapBigToHostInt64(x)
+#    define htobe64(x) OSSwapHostToBigInt64(x)
+#  elif defined(__sun)
+#    define betoh64(x) BE_64(x)
+#    define htobe64(x) BE_64(x)
+#  else
+#    define betoh64(x) be64toh(x)
+#  endif
 #endif
+
 #ifndef HAVE_STRLCAT
 extern	size_t	  strlcat(char *, const char *, size_t);
 #endif