Use more conventional way for the alignment

[oweals/odhcp6c.git] / src / dhcpv6.c

diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index 3e128bcfa151c1001d56ccd6661b3eb880bbfc77..5998b75ccf5281fa06edfa94201515b8c9ed501e 100644 (file)
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -586,12 +586,14 @@ int dhcpv6_request(enum dhcpv6_msg type)
                for (; len < 0 && (round_start < round_end);
                                round_start = odhcp6c_get_milli_time()) {
                        uint8_t buf[1536];
-                       uint8_t cmsg_buf[CMSG_SPACE(sizeof(struct in6_pktinfo))]
-                               __aligned(__alignof__(struct cmsghdr));
+                       union {
+                               struct cmsghdr hdr;
+                               uint8_t buf[CMSG_SPACE(sizeof(struct in6_pktinfo))];
+                       } cmsg_buf;
                        struct iovec iov = {buf, sizeof(buf)};
                        struct sockaddr_in6 addr;
                        struct msghdr msg = {.msg_name = &addr, .msg_namelen = sizeof(addr),
-                                       .msg_iov = &iov, .msg_iovlen = 1, .msg_control = cmsg_buf,
+                                       .msg_iov = &iov, .msg_iovlen = 1, .msg_control = cmsg_buf.buf,
                                        .msg_controllen = sizeof(cmsg_buf)};
                        struct in6_pktinfo *pktinfo = NULL;