Apply patch from http://python.org/sf/728330 to fix socket module compilation on Solaris 2.6, HP-UX 11, AIX 5.1 and (possibly) some IRIX versions.
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 5d8a552..e6db05b 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -257,7 +257,19 @@
# define O_NONBLOCK O_NDELAY
#endif
-#include "addrinfo.h"
+/* include Python's addrinfo.h unless it causes trouble */
+#if defined(__sgi) && _COMPILER_VERSION>700 && defined(_SS_ALIGNSIZE)
+ /* Do not include addinfo.h on some newer IRIX versions.
+ * _SS_ALIGNSIZE is defined in sys/socket.h by 6.5.21,
+ * for example, but not by 6.5.10.
+ */
+#elif defined(_MSC_VER) && _MSC_VER>1200
+ /* Do not include addrinfo.h for MSVC7 or greater. 'addrinfo' and
+ * EAI_* constants are defined in (the already included) ws2tcpip.h.
+ */
+#else
+# include "addrinfo.h"
+#endif
#ifndef HAVE_INET_PTON
int inet_pton(int af, const char *src, void *dst);