putty源文件在linux环境下编译遇到问题

[廖某]

我在putty官网下，下载了putty的源码，但是在编译到时候遇到了问题。
报错信息如下：

../unix/uxnet.c: 在函数‘sk_getxdmdata’中:
../unix/uxnet.c:853: 错误：dereferencing pointer ‘sa’ does break strict-aliasing rules
../unix/uxnet.c:838: 附注：initialized from here
../unix/uxnet.c:858: 错误：dereferencing pointer ‘sin’ does break strict-aliasing rules
../unix/uxnet.c:858: 错误：dereferencing pointer ‘sin’ does break strict-aliasing rules
../unix/uxnet.c:857: 错误：dereferencing pointer ‘sin’ does break strict-aliasing rules
../unix/uxnet.c:857: 错误：dereferencing pointer ‘sin’ does break strict-aliasing rules
../unix/uxnet.c:857: 错误：dereferencing pointer ‘sin’ does break strict-aliasing rules
../unix/uxnet.c:857: 错误：dereferencing pointer ‘sin’ does break strict-aliasing rules
../unix/uxnet.c:839: 附注：initialized from here
../unix/uxnet.c:866: 错误：dereferencing pointer ‘sin6’ does break strict-aliasing rules
../unix/uxnet.c:866: 错误：dereferencing pointer ‘sin6’ does break strict-aliasing rules
../unix/uxnet.c:864: 错误：dereferencing pointer ‘sin6’ does break strict-aliasing rules
../unix/uxnet.c:864: 错误：dereferencing pointer ‘sin6’ does break strict-aliasing rules
../unix/uxnet.c:864: 错误：dereferencing pointer ‘sin6’ does break strict-aliasing rules
../unix/uxnet.c:836: 附注：initialized from here
../unix/uxnet.c: 在函数‘net_select_result’中:
../unix/uxnet.c:293: 错误：dereferencing pointer ‘ss.64’ does break strict-aliasing rules
../unix/uxnet.c:1071: 附注：initialized from here
../unix/uxnet.c:296: 错误：dereferencing pointer ‘sin’ does break strict-aliasing rules
../unix/uxnet.c:295: 附注：initialized from here
../unix/uxnet.c:300: 错误：dereferencing pointer ‘sin6’ does break strict-aliasing rules
../unix/uxnet.c:300: 错误：dereferencing pointer ‘sin6’ does break strict-aliasing rules
../unix/uxnet.c:300: 错误：dereferencing pointer ‘sin6’ does break strict-aliasing rules
../unix/uxnet.c:300: 错误：dereferencing pointer ‘sin6’ does break strict-aliasing rules
../unix/uxnet.c:299: 附注：initialized from here

其中853行的代码为：
switch(sa->sa_family) {
838行的代码为：
struct sockaddr *sa = (struct sockaddr *)&addr;


整体出错的代码如下：

void *sk_getxdmdata(void *sock, int *lenp)
{
    Actual_Socket s = (Actual_Socket) sock;
#ifdef NO_IPV6
    struct sockaddr_in addr;
#else
    struct sockaddr_storage addr;
    struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&addr;
#endif
    struct sockaddr *sa = (struct sockaddr *)&addr;
    struct sockaddr_in *sin = (struct sockaddr_in *)&addr;
    socklen_t addrlen;
    char *buf;
    static unsigned int unix_addr = 0xFFFFFFFF;

    /*
     * We must check that this socket really _is_ an Actual_Socket.
     */
    if (s->fn != &tcp_fn_table)
	return NULL;		       /* failure */

    addrlen = sizeof(addr);
    if (getsockname(s->s, sa, &addrlen) < 0)
	return NULL;
    switch(sa->sa_family) {
      case AF_INET:
	*lenp = 6;
	buf = snewn(*lenp, char);
	PUT_32BIT_MSB_FIRST(buf, ntohl(sin->sin_addr.s_addr));
	PUT_16BIT_MSB_FIRST(buf+4, ntohs(sin->sin_port));
	break;
#ifndef NO_IPV6
    case AF_INET6:
	*lenp = 6;
	buf = snewn(*lenp, char);
	if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
	    memcpy(buf, sin6->sin6_addr.s6_addr + 12, 4);
	    PUT_16BIT_MSB_FIRST(buf+4, ntohs(sin6->sin6_port));
	} else
	    /* This is stupid, but it's what XLib does. */
	    memset(buf, 0, 6);
	break;
#endif
      case AF_UNIX:
	*lenp = 6;
	buf = snewn(*lenp, char);
	PUT_32BIT_MSB_FIRST(buf, unix_addr--);
        PUT_16BIT_MSB_FIRST(buf+4, getpid());
	break;

	/* XXX IPV6 */

      default:
	return NULL;
    }

    return buf;
}

我的gcc编译器版本为4.4.7 20120313 (Red Hat 4.4.7-16) (GCC),操作系统为centos6.6

[假正经的班长]

http://stackoverflow.com/questions/3464888/dereferencing-pointer-does-break-strict-anti-aliasing-rules-using-berkeley-socke 据说是gcc的bug，解决方法是把诸如 sin->sin_port 的形式改成 (*sin).sin_port

[廖某]

我都忘记是怎么解决的了。。。结帖吧。。