Re: [PATCH] Fix python compatibility with old versions of GDB

[Orgad Shaneh <orgads@gmail.com>]

On Mon, Jun 12, 2017 at 12:09 AM, Simon Marchi <simon.marchi@polymtl.ca> wrote:
> On 2017-06-11 19:48, Orgad Shaneh wrote:
>>
>> If data-directory is shared between various version of GDB, it should
>> work for all of them.
>>
>> There are several hasattr conditions that enable this kind of
>> compatibility.
>>
>> RegexpCollectionPrettyPrinter was missing a check that enables it to
>> work with GDB prior to 7.9, when Type.name was introduced.
>
>
> Hi Orgad,
>
> I still don't understand what problem this is trying to fix.  It looks like
> you want to make older versions of GDB work with newer versions of the
> Python scripts in the data directory.  I am not sure this is what we want.
> If you want multiple version of GDB in parallel on a system, they should all
> be compiled with a different --prefix, and they will all get their own
> data-directory.  We should only expect a certain version of the data
> directory to be compatible with the version of GDB it was shipped with.  Or
> am I missing some use case where this is not true?

Hi,

Practically the data-directory is mostly backwards-compatible, except this
small part which I found (there might be others which I didn't find). With this
patch, I'm able to run GDB 7.8 with the latest data-directory.

Is there a reason not to accept it?

- Orgad