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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: gdb mode with gdb command from the docker
Date: Sun, 18 Oct 2020 18:57:09 +0300
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In-Reply-To: <m2r1pvy3kb.fsf@gmail.com> (message from William Xu on Sun, 18
 Oct 2020 17:08:36 +0200)
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> From: William Xu <william.xwl@gmail.com>
> Date: Sun, 18 Oct 2020 17:08:36 +0200
> 
> Then invoke the gdb with: (gdb "/path/gdbWrapper").  The *gud* buffer
> can be created successfully. The executable file can be loaded OK,
> however,  it reports some tty error while trying to run the executable: 
> 
> ---------------------------------8<------------------------------------- 
> (gdb) file a.out
> Load new symbol table from "a.out"? (y or n) [answered Y; input not from terminal]

This is normal.

> Reading symbols from a.out...done.
> (gdb) r
> Starting program: /test/a.out 
> /dev/ttys002: No such file or directory.

This is not, but the error message seems to come from a.out, not from
GDB.  So I think you should review the program's code and see why it
fails that way.