diff -up hugs98-plus-Sep2006/packages/network/include/HsNet.h.gnu hugs98-plus-Sep2006/packages/network/include/HsNet.h
--- hugs98-plus-Sep2006/packages/network/include/HsNet.h.gnu	2006-09-21 00:28:56.000000000 +0200
+++ hugs98-plus-Sep2006/packages/network/include/HsNet.h	2015-07-10 13:39:37.824377073 +0200
@@ -20,7 +20,7 @@
 # if defined(_MSC_VER)
 #  define INLINE extern __inline
 # elif defined(__GNUC__)
-#  define INLINE extern inline
+#  define INLINE inline
 # else
 #  define INLINE inline
 # endif
@@ -132,4 +132,11 @@ my_inet_ntoa(
     return inet_ntoa(a);
 }
 
+
+struct ucred {
+    pid_t pid;    /* process ID of the sending process */
+    uid_t uid;    /* user ID of the sending process */
+    gid_t gid;    /* group ID of the sending process */
+};
+
 #endif