[RFC] GDB BoF at the Cauldron 2025 next Saturday

[Pedro Alves <pedro@palves.net>]

Hi all!

Request for comments below.

Cauldron 2025 is just around the corner, starting this coming Friday.

As in previous years, I'll be hosting a GDB BoF session there.  It is
scheduled for Saturday from 14:30 to 15:30:
https://conf.gnu-tools-cauldron.org/opo25/talk/8CAXUU/

There will be several GDB maintainers, contributors and users in
attendance, and the goal of the BoF is to take the opportunity for the
community to meet to discuss all things related to the GNU Debugger
project.

And as in previous years, I plan to take notes live on the projected
screen while we discuss, and then share the result here on the list.

I thought I'd bring along a preliminary list of agenda topics to
discuss, just to break the ice, and send this email to see if there
are things people want to add to the list.

The list of topics is of course not closed, and you are very welcome
to bring your own to the session.

Here's my potential list discussion topics.  Please feel free to share
your ideas.  They're more than welcome.

- The recurring topics :-)

  - Can we / should we require C++20?

    The move to C++17 happened around the 2023 BoF.  :-)

  - Patch review/approval mechanisms

    Feedback on usage of Approved-by etc. tags?

  - Licensing, DCO, etc.  There's a Licensing BoF on Sunday.  We can
    collect thoughts and take them there.

- Incoming GDB 17.1 release.  Anything people want to discuss about
  this?  Blockers, etc.?

- DWARF 6 is progressing, with some important changes that allow GPU
  debugging very likely to be accepted there soon.  How does the
  community feel about adding experimental DWARF 6 support to
  GDB master, especially the locations on the stack changes?

    Issue 230524.1: Location Descriptions on the DWARF Stack
    https://dwarfstd.org/issues/230524.1.html

- Where we do see GDB in 2026 and beyond?  Aka, big ticket items we'd
  like see happening in the coming year and after.  We can discuss
  potential blockers and if different people and teams can coordinate.

  I'll share my own very biased list, please share yours!

  - (Another) year of the GPU.  :-)

    GDB gains support for lane debugging, as per the results of the
    collaboration between AMD and Intel: See "Lane support in GDB for
    debugging GPUs" BoF session on Friday:
    https://conf.gnu-tools-cauldron.org/opo25/talk/FN7FKL/

    Intel GPU support is merged to master.  GDB ends up with support
    for at least two GPUs (AMD, Intel), maybe more!

    We come up with an address spaces user interface that works
    for everyone.

  - Windows non-stop support.

  - Native Windows testsuite in good shape.

  - The libpython ABI issue goes away. (One can dream.)  The Python
    linking model situation is a pain point for everyone who distributes
    GDB for multiple distros.  Matthieu Longo, are you attending?  We can
    discuss the allowing a more recent version of Python at runtime
    than GDB was compiled with project, aka, the Python limited C API
    effort.  And we can all share our experiences with the different
    approaches to handle the situation.

  - Others?  What are people working on?  I'd love to hear about it.


Looking forward to meeting with all at the Cauldron soon!
Pedro Alves