Go patch committed: Update libgo to Go release r60

[Ian Lance Taylor]

Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> writes:

> Unfortunately, the
>
> /vol/gcc/src/hg/trunk/local/libgo/syscalls/exec.go:11:14: error: imported and not used: unsafe
>
> error remains.  I've no idea what triggers it.

Bother.  Neither do I.  I just looked through the code and it all looks
fine.  The reference to unsafe.Pointer will be parsed by
Parse::operand.  On one of the lines which uses unsafe.Pointer, it will
see "unsafe", see that it is a package, and call package->set_used().
That will set the flag which is later tested by Gogo::clear_file_scope
to prevent the warning.

I tried compiling the set of files which will be compiled on Solaris,
but still couldn't recreate the problem.

Ian