libgo: update to Go 1.8 release candidate 1

    
    Compiler changes:
      * Change map assignment to use mapassign and assign value directly.
      * Change string iteration to use decoderune, faster for ASCII strings.
      * Change makeslice to take int, and use makeslice64 for larger values.
      * Add new noverflow field to hmap struct used for maps.
    
    Unresolved problems, to be fixed later:
      * Commented out test in go/types/sizes_test.go that doesn't compile.
      * Commented out reflect.TestStructOf test for padding after zero-sized field.
    
    Reviewed-on: https://go-review.googlesource.com/35231

gotools/:
	Updates for Go 1.8rc1.
	* Makefile.am (go_cmd_go_files): Add bug.go.
	(s-zdefaultcc): Write defaultPkgConfig.
	* Makefile.in: Rebuild.

From-SVN: r244456

1 files changed, 22 insertions, 1 deletions

diff --git a/libgo/go/net/iprawsock.go b/libgo/go/net/iprawsock.go
index 173b3cb4114..d994fc67c65 100644
--- a/libgo/go/net/iprawsock.go
+++ b/libgo/go/net/iprawsock.go
@@ -9,6 +9,24 @@ import (
 	"syscall"
 )
 
+// BUG(mikio): On every POSIX platform, reads from the "ip4" network
+// using the ReadFrom or ReadFromIP method might not return a complete
+// IPv4 packet, including its header, even if there is space
+// available. This can occur even in cases where Read or ReadMsgIP
+// could return a complete packet. For this reason, it is recommended
+// that you do not use these methods if it is important to receive a
+// full packet.
+//
+// The Go 1 compatibility guidelines make it impossible for us to
+// change the behavior of these methods; use Read or ReadMsgIP
+// instead.
+
+// BUG(mikio): On NaCl, Plan 9 and Windows, the ReadMsgIP and
+// WriteMsgIP methods of IPConn are not implemented.
+
+// BUG(mikio): On Windows, the File method of IPConn is not
+// implemented.
+
 // IPAddr represents the address of an IP end point.
 type IPAddr struct {
 	IP   IP
@@ -46,6 +64,9 @@ func (a *IPAddr) opAddr() Addr {
 // ResolveIPAddr parses addr as an IP address of the form "host" or
 // "ipv6-host%zone" and resolves the domain name on the network net,
 // which must be "ip", "ip4" or "ip6".
+//
+// Resolving a hostname is not recommended because this returns at most
+// one of its IP addresses.
 func ResolveIPAddr(net, addr string) (*IPAddr, error) {
 	if net == "" { // a hint wildcard for Go 1.0 undocumented behavior
 		net = "ip"
@@ -59,7 +80,7 @@ func ResolveIPAddr(net, addr string) (*IPAddr, error) {
 	default:
 		return nil, UnknownNetworkError(net)
 	}
-	addrs, err := internetAddrList(context.Background(), afnet, addr)
+	addrs, err := DefaultResolver.internetAddrList(context.Background(), afnet, addr)
 	if err != nil {
 		return nil, err
 	}