cmd/ld: handle ElfSymBindWeak

[gopherbot]

by kuangche:

What steps will reproduce the problem?
1. cd src; sh all.bash

What is the expected output?
Build ok without error

What do you see instead?
# ../misc/cgo/test
# testmain
/tmp/go-build734041700/_/home/data/repos/hg/go/misc/cgo/test/_test/_/home/data/repos/hg/go/misc/cgo/test.a(_all.o):
malformed elf file: compilerrt_abort_impl: invalid symbol binding 2
FAIL    _/home/data/repos/hg/go/misc/cgo/test [build failed]


Which operating system are you using?
FreeBSD 10.0-CURRENT r239050 (Tue Aug  7 23:30:58 CST 2012) amd64


Please provide any additional information below.
Via hg bisect, I found this issue was introduced since 
13896   5334356f42b3   2012-08-17 03:42 +0800   minux
  cmd/go: new cgo build procedure

Please let me know what additional information you need.

[minux]

Comment 1:

Thank you for your detailed report.
it will certainly help if you can attach a tarball of work files for misc/cgo/test.
issue this command:
$ go test -work -x $GOROOT/misc/cgo/test
the command will display at first line WORK=/var/tmp/xxxxx
please make a tarball of all files under $WORK directory so that
I can test and fix this without upgrading to -current.
(of course, make sure the build fails with the same reason)

Labels changed: added priority-later, removed priority-triage.

Owner changed to @minux.

Status changed to Accepted.

[gopherbot]

Comment 2 by kuangche:

$ go test -work -x $GOROOT/misc/cgo/test
says "cannot import absolute path"
so I run
$ cd $GOROOT/misc/cgo/test; go test -work -x .
instead.
tarball attached

Attachments:

1. issue4273.tgz (163268 bytes)

[minux]

Comment 3:

This issue was closed by revision 78a6f75.

Status changed to Fixed.