how to redirect output of sub program in target extended-remote

[Amker.Cheng]

Hi,
I'm debugging through a remote stub like:
> target extended-remote | stub_program
everything goes ok, but the only problem is that the outputs of
stub_program go into the same terminal of gdb.
Is there any method to redirect the output of stub_program in this case?
BTW, I could not execute stub_program in another console due to the
stub_program itself, so it has to be issued in gdb command line
interface.

Thanks very much

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Best Regards.