net: fix non-unixen build

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6813101

diff --git a/src/pkg/net/ipsock.go b/src/pkg/net/ipsock.go
index d1fcb4852f7f9fee6660b0d5e96104ecf49751cb..9d48e8c1036347d94e7a1d34d796f9d44efbcf47 100644 (file)
--- a/src/pkg/net/ipsock.go
+++ b/src/pkg/net/ipsock.go
@@ -8,7 +8,12 @@ package net
 
 import "time"
 
-var supportsIPv6, supportsIPv4map = probeIPv6Stack()
+var supportsIPv6, supportsIPv4map bool
+
+func init() {
+       sysInit()
+       supportsIPv6, supportsIPv4map = probeIPv6Stack()
+}
 
 func firstFavoriteAddr(filter func(IP) IP, addrs []string) (addr IP) {
        if filter == nil {