[Bug libstdc++/116730] `make install` fails when processing libbacktrace while installing libstdc++ due invoking configure with a relative path other than ../

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116730

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|`make install` fails when   |`make install` fails when
                   |processing libbacktrace     |processing libbacktrace
                   |while installing libstdc++  |while installing libstdc++
                   |                            |due invoking configure with
                   |                            |a relative path other than
                   |                            |../
           Keywords|                            |build
             Status|WAITING                     |UNCONFIRMED
     Ever confirmed|1                           |0

--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So yes I can reproduce the failure but I think relative pathes other than `../`
are not supported when it comes to configuring.

As I mentioned invoking configure as:
```
`pwd`/../../configure ...
```

Will fix the issue.