Add needed functions to glibc-compat for pkg

ports/glibc-compat/include/sys/un.h

Index: ports/glibc-compat/include/sys/un.h
diff --git a/ports/glibc-compat/include/sys/un.h b/ports/glibc-compat/include/sys/un.h
index 673c84b0bb6cfeb6dc9e4e92018861dd5d326819..654147484f145620945c118b74b1bd3671319d05 100644
--- a/ports/glibc-compat/include/sys/un.h
+++ b/ports/glibc-compat/include/sys/un.h
@@ -1,3 +1,8 @@
+/*
+ * Copyright 2015 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
 /* olonho */
 #ifndef GLIBCEMU_SYS_UN_H
 #define GLIBCEMU_SYS_UN_H       1
@@ -9,6 +14,10 @@ struct sockaddr_un {
         char            sun_path[108];
 };
 
+/* pulled from freebsd 10.1 sys/sys/un.h */
+/* actual length of an initialized sockaddr_un */
+#define SUN_LEN(su) \
+  (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
+
 #endif /* GLIBCEMU_SYS_UN_H */
 /* end of olonho */

[Sam Clegg, 2015/07/28 00:14:13]

Maybe remove these olonho comments too.  He used to work on the project but
doesn't anymore.

[zhitingzhu, 2015/07/28 02:05:41]

Done.

-