From http://www.jwz.org/xscreensaver/xscreensaver-5.35.tar.gz

[xscreensaver] / utils / async_netdb.h

diff --git a/utils/async_netdb.h b/utils/async_netdb.h
index df6c59c63534081cb8925cea59e196a447505c67..a72f4d599d3aef8962482d3168a47e9d6848b138 100644 (file)
--- a/utils/async_netdb.h
+++ b/utils/async_netdb.h
@@ -53,13 +53,25 @@
 
 #if ASYNC_NETDB_USE_GAI
 
-typedef struct sockaddr_storage async_netdb_sockaddr_storage_t;
+/* Without using union, gcc-6 warns for
+   breaking strict aliasing rules
+ */
+typedef union {
+       struct sockaddr_storage x_sockaddr_storage;
+       struct sockaddr_in x_sockaddr_in;
+       struct sockaddr_in6 x_sockaddr_in6;
+} async_netdb_sockaddr_storage_t;
 
 int _async_netdb_is_done (struct io_thread *io);
 
 #else
 
-typedef struct sockaddr_in async_netdb_sockaddr_storage_t;
+/* Because the definition for the above case is now union,
+   the definition for this case must also be union...
+*/
+typedef union {
+       struct sockaddr_in x_sockaddr_in;
+} async_netdb_sockaddr_storage_t;
 
 # ifndef EAI_SYSTEM
 /* The EAI_* codes are specified specifically as preprocessor macros, so