http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51598

             Bug #: 51598
           Summary: Missing dependency on net/net.lo causes bootstrap
                    failure
    Classification: Unclassified
           Product: gcc
           Version: 4.6.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: go
        AssignedTo: i...@airs.com
        ReportedBy: hjl.to...@gmail.com


On 4.6 branch, libgo has

net/net.lo: $(go_net_files) bytes.gox fmt.gox io.gox os.gox reflect.gox \
                strconv.gox strings.gox sync.gox syscall.gox

and libgo/go/net/dnsclient.go has

import (
    "bytes"
    "fmt"
    "os"
    "rand"
    "sync"
    "time"
)

net/net.lo is compiled with

files=`echo ../../../../libgo/go/net/dial.go
../../../../libgo/go/net/dnsclient.go ../../../../libgo/go/net/dnsconfig.go
../../../../libgo/go/net/dnsmsg.go ../../../../libgo/go/net/newpollserver.go
../../../../libgo/go/net/fd.go ../../../../libgo/go/net/fd_linux.go
../../../../libgo/go/net/hosts.go ../../../../libgo/go/net/ip.go
../../../../libgo/go/net/iprawsock.go ../../../../libgo/go/net/ipsock.go
../../../../libgo/go/net/net.go ../../../../libgo/go/net/parse.go
../../../../libgo/go/net/pipe.go ../../../../libgo/go/net/port.go
../../../../libgo/go/net/sock.go ../../../../libgo/go/net/tcpsock.go
../../../../libgo/go/net/udpsock.go ../../../../libgo/go/net/unixsock.go
bytes.gox fmt.gox io.gox os.gox reflect.gox strconv.gox strings.gox sync.gox
syscall.gox | sed -e 's/[^ ]*\.gox//g'`; /bin/sh ./libtool --tag GO
--mode=compile
/export/redhat/rpms/BUILD/gcc-4.6.1-20110908/obj-x86_64-redhat-linux/./gcc/gccgo
-B/export/redhat/rpms/BUILD/gcc-4.6.1-20110908/obj-x86_64-redhat-linux/./gcc/
-B/usr/x86_64-redhat-linux/bin/ -B/usr/x86_64-redhat-linux/lib/ -isystem
/usr/x86_64-redhat-linux/include -isystem /usr/x86_64-redhat-linux/sys-include 
   -minline-all-stringops -O2 -g  -mx32 -I . -c -fgo-prefix="libgo_net" -o
net/net.lo $files

bootstrap with "make -j12" failed at random with

../../../../libgo/go/net/dnsclient.go:23:6: error: import file 'time' not found
../../../../libgo/go/net/fd.go:14:6: error: import file 'time' not found
../../../../libgo/go/net/dnsclient.go:58:39: error: reference to undefined name
'time'
../../../../libgo/go/net/fd.go:155:9: error: reference to undefined name 'time'

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