@@ -149,7 +149,7 @@ enum __socket_type
#include <bits/sockaddr.h>
/* Structure describing a generic socket address. */
-struct sockaddr
+struct __attribute_struct_may_alias__ sockaddr
{
__SOCKADDR_COMMON (sa_); /* Common data: address family and length. */
char sa_data[14]; /* Address data. */
@@ -166,7 +166,7 @@ struct sockaddr
#define _SS_PADSIZE \
(_SS_SIZE - __SOCKADDR_COMMON_SIZE - sizeof (__ss_aligntype))
-struct sockaddr_storage
+struct __attribute_struct_may_alias__ sockaddr_storage
{
__SOCKADDR_COMMON (ss_); /* Address family, etc. */
char __ss_padding[_SS_PADSIZE];
@@ -244,7 +244,7 @@ extern const struct in6_addr in6addr_loopback; /* ::1 */
/* Structure describing an Internet socket address. */
-struct sockaddr_in
+struct __attribute_struct_may_alias__ sockaddr_in
{
__SOCKADDR_COMMON (sin_);
in_port_t sin_port; /* Port number. */
@@ -257,9 +257,11 @@ struct sockaddr_in
- sizeof (struct in_addr)];
};
-#if !__USE_KERNEL_IPV6_DEFS
+#if __USE_KERNEL_IPV6_DEFS
+struct __attribute_struct_may_alias__ sockaddr_in6;
+#else
/* Ditto, for IPv6. */
-struct sockaddr_in6
+struct __attribute_struct_may_alias__ sockaddr_in6
{
__SOCKADDR_COMMON (sin6_);
in_port_t sin6_port; /* Transport layer port # */
@@ -874,4 +874,13 @@ _Static_assert (0, "IEEE 128-bits long double requires redirection on this platf
# define __attribute_returns_twice__ /* Ignore. */
#endif
+/* Mark struct types as aliasable. Restricted to compilers that
+ support forward declarations of structs in the presence of the
+ attribute. */
+#if __GNUC_PREREQ (7, 0) || defined __clang__
+# define __attribute_struct_may_alias__ __attribute__ ((__may_alias__))
+#else
+# define __attribute_struct_may_alias__
+#endif
+
#endif /* sys/cdefs.h */
@@ -26,7 +26,7 @@
__BEGIN_DECLS
/* Structure describing the address of an AF_LOCAL (aka AF_UNIX) socket. */
-struct sockaddr_un
+struct __attribute_struct_may_alias__ sockaddr_un
{
__SOCKADDR_COMMON (sun_);
char sun_path[108]; /* Path name. */
@@ -153,7 +153,7 @@ enum __socket_type
#include <bits/sockaddr.h>
/* Structure describing a generic socket address. */
-struct sockaddr
+struct __attribute_struct_may_alias__ sockaddr
{
__SOCKADDR_COMMON (sa_); /* Common data: address family and length. */
char sa_data[14]; /* Address data. */
@@ -170,7 +170,7 @@ struct sockaddr
#define _SS_PADSIZE \
(_SS_SIZE - __SOCKADDR_COMMON_SIZE - sizeof (__ss_aligntype))
-struct sockaddr_storage
+struct __attribute_struct_may_alias__ sockaddr_storage
{
__SOCKADDR_COMMON (ss_); /* Address family, etc. */
char __ss_padding[_SS_PADSIZE];
@@ -181,7 +181,7 @@ typedef __socklen_t socklen_t;
#include <bits/sockaddr.h>
/* Structure describing a generic socket address. */
-struct sockaddr
+struct __attribute_struct_may_alias__ sockaddr
{
__SOCKADDR_COMMON (sa_); /* Common data: address family and length. */
char sa_data[14]; /* Address data. */
@@ -194,7 +194,7 @@ struct sockaddr
#define _SS_PADSIZE \
(_SS_SIZE - __SOCKADDR_COMMON_SIZE - sizeof (__ss_aligntype))
-struct sockaddr_storage
+struct __attribute_struct_may_alias__ sockaddr_storage
{
__SOCKADDR_COMMON (ss_); /* Address family, etc. */
char __ss_padding[_SS_PADSIZE];
@@ -26,7 +26,7 @@
From Linux 2.1 the AF_PACKET interface is preferred and you should
consider using it in place of this one. */
-struct sockaddr_pkt
+struct __attribute_struct_may_alias__ sockaddr_pkt
{
__SOCKADDR_COMMON (spkt_);
unsigned char spkt_device[14];
@@ -22,7 +22,7 @@
#include <features.h>
#include <bits/sockaddr.h>
-struct sockaddr_ash
+struct __attribute_struct_may_alias__ sockaddr_ash
{
__SOCKADDR_COMMON (sash_); /* Common data: address family etc. */
int sash_ifindex; /* Interface to use. */
@@ -28,7 +28,7 @@ struct ec_addr
unsigned char net; /* Network number. */
};
-struct sockaddr_ec
+struct __attribute_struct_may_alias__ sockaddr_ec
{
__SOCKADDR_COMMON (sec_);
unsigned char port; /* Port number. */
@@ -23,7 +23,7 @@
__BEGIN_DECLS
-struct sockaddr_iucv
+struct __attribute_struct_may_alias__ sockaddr_iucv
{
__SOCKADDR_COMMON (siucv_);
unsigned short siucv_port; /* Reserved */