I'm not sure if this is the right place, but I'm putting this out there at any rate: I'd be interested in a deep dive into STG and related shenanigans "within the compiler", since my understanding is that a decent amount has changed since the last paper on STG (eval/apply). This is out of an interest in understanding STG as-it-lives within GHC so I can get back to simplexhc(https://github.com/bollu/simplexhc), a pet project of mine. I meant to take some time and read through the GHC internals in this area, but college coursework does not really facilitate deep meditation about the GHC codebase ;) Would someone be willing to help with this? Thanks, ~Siddharth On Tue, Apr 30, 2019 at 10:13 PM Richard Eisenberg wrote:

I'm also happy to lead a session on GHC. I could perhaps give a high-level overview (no slides, just whiteboard & projected code) on the GHC compilation pipeline. I don't expect it would be terribly hands-on, though I would hope to get lots of questions from the audience. This might most easily come before Simon's presentation, which would doubtless be more detailed.

I'm happy to assist others in their hacking efforts, too.

I'll be around Fri - Sun.

Richard

On Apr 23, 2019, at 12:51 PM, Andreas Herrmann wrote:

Dear GHC devs,

This year's ZuriHac 2019 [1] will again feature a dedicated GHC track to foster contributions to GHC and teach newcomers how to participate in GHC's development. It was a great success last year, and we hope it will be a great success this year as well.

For that we need your help: We would like to invite you to organize a session in the GHC track. This could be in form of a presentation, a workshop, or a hack session with topics centered around GHC.

For some inspiration, these are the subjects from last year's track: - Continuous Integration / DevOps, by Manual Chakravarty - PrimOps / PrimTypes, by Michal Terepeta - Performance Regression Tests, by Niklas Hambüchen - Newcomers Tutorial, by Andreas Herrmann

Other possible subjects could be around: - Improving documentation - Extending GHC's test-suite - General GHC development workflows - The inner workings of some aspect of GHC

Aside from preparing a session, we are also looking for volunteers to be around as GHC mentors during hack sessions to help out newcomers.

Please let us know if you'd be interested in leading a session, or being a mentor, or helping out with this track in any other way. You can contact either Niklas or myself, on this list or by private message.

Best, Niklas and Andreas ZuriHac 2019 GHC track coordinators

[1]: https://zfoh.ch/zurihac2019/ _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs

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I'd be interested in the STG, RTS, PrimOp semantics. It would be helpful for my ghc-grin https://github.com/grin-tech/ghc-grin project, which is a (work in progress) whole program optimizer backend for GHC. On Wed, May 1, 2019 at 9:51 AM Simon Peyton Jones via ghc-devs < ghc-devs@haskell.org> wrote:

I’d be happy to help with anything GHC-related. I’ll take the advice of the ZuriHac organisers (Jesper, Andreas) about what would be best; but probably mail on this list would be a good way to gather ideas

Simon

*From:* ghc-devs *On Behalf Of *Siddharth Bhat *Sent:* 30 April 2019 18:17 *To:* Richard Eisenberg *Cc:* GHC developers ; Niklas Hambüchen < niklas@nh2.me> *Subject:* Re: ZuriHac 2019 - GHC Track

I'm not sure if this is the right place, but I'm putting this out there at any rate:

I'd be interested in a deep dive into STG and related shenanigans "within the compiler", since my understanding is that a decent amount

has changed since the last paper on STG (eval/apply). This is out of an interest in understanding STG as-it-lives within GHC so I can get back to

simplexhc(https://github.com/bollu/simplexhc https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fbollu%2Fsimplexhc&data=01%7C01%7Csimonpj%40microsoft.com%7Cf81e8b0c64934ab91e0a08d6cd8ebcaf%7C72f988bf86f141af91ab2d7cd011db47%7C1&sdata=BPu7HQkoCaPeTUMY4ksM1y2GAjGazMyAf8IaJL2Qzhc%3D&reserved=0), a pet project of mine.

I meant to take some time and read through the GHC internals in this area, but college coursework does not really facilitate deep meditation

about the GHC codebase ;)

Would someone be willing to help with this?

Thanks,

~Siddharth

On Tue, Apr 30, 2019 at 10:13 PM Richard Eisenberg wrote:

I'm also happy to lead a session on GHC. I could perhaps give a high-level overview (no slides, just whiteboard & projected code) on the GHC compilation pipeline. I don't expect it would be terribly hands-on, though I would hope to get lots of questions from the audience. This might most easily come before Simon's presentation, which would doubtless be more detailed.

I'm happy to assist others in their hacking efforts, too.

I'll be around Fri - Sun.

Richard

On Apr 23, 2019, at 12:51 PM, Andreas Herrmann wrote:

Dear GHC devs,

This year's ZuriHac 2019 [1] will again feature a dedicated GHC track to foster contributions to GHC and teach newcomers how to participate in GHC's development. It was a great success last year, and we hope it will be a great success this year as well.

For that we need your help: We would like to invite you to organize a session in the GHC track. This could be in form of a presentation, a workshop, or a hack session with topics centered around GHC.

For some inspiration, these are the subjects from last year's track:

- Continuous Integration / DevOps, by Manual Chakravarty

- PrimOps / PrimTypes, by Michal Terepeta

- Performance Regression Tests, by Niklas Hambüchen

- Newcomers Tutorial, by Andreas Herrmann

Other possible subjects could be around:

- Improving documentation

- Extending GHC's test-suite

- General GHC development workflows

- The inner workings of some aspect of GHC

Aside from preparing a session, we are also looking for volunteers to be around as GHC mentors during hack sessions to help out newcomers.

Please let us know if you'd be interested in leading a session, or being a mentor, or helping out with this track in any other way. You can contact either Niklas or myself, on this list or by private message.

Best,

Niklas and Andreas

ZuriHac 2019 GHC track coordinators

[1]: https://zfoh.ch/zurihac2019/ https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fzfoh.ch%2Fzurihac2019%2F&data=01%7C01%7Csimonpj%40microsoft.com%7Cf81e8b0c64934ab91e0a08d6cd8ebcaf%7C72f988bf86f141af91ab2d7cd011db47%7C1&sdata=zx1dedEVL2n8B6%2BCfXTeNPrkxNLcmmykGzHp6ferLbQ%3D&reserved=0

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I am writing a blog post concurrently with preparing my talk so I will post that afterwards. I would have expected `dante` to work with the `./hadrian/ghci.sh` target. What goes wrong there? The haskell-ide-engine support lives on a branch, which you are welcome to try, but comes with no guarantees. It is more than a proof of concept but less than fully production ready. Matt On Tue, Jun 11, 2019 at 7:29 AM Sven Tennie wrote:

Hey Matthew,

Could you do me a big favor and record/document this session? Unfortunately I won't make it to the ZuriHac, but I'm highly interested in improving my GHC workflow.

Currently I'm working in a cycle of:

1. read code in haskell-code-explorer [1] 2. modify it in Emacs (currently only syntax highlighting, no type checking) 3. look at ghcid if the types match 4. goto 1 or use hadrian to build

I guess this may be improved by the haskell-ide-engine.

Of course would it be amazing, if all talks could be recorded.

BTW - If any of the other readers has a better setup, please share. I found very little about IDE setup for GHC in the Wiki or Internet and the "standard" dante or intero approaches don't seem to work, at least not out of the box.

Best regards,

Sven

[1] - https://haskell-code-explorer.mfix.io/package/ghc-8.6.1/

Am Sa., 25. Mai 2019 um 13:08 Uhr schrieb Matthew Pickering :

...

Andreas/Niklas,

I can do a talk/demo of using tools such as `ghc-artefact-nix`, `haskell-ide-engine`, `ghcid`, GHC's debugger whilst working on GHC. Could you schedule in a 30 minute slot for that please if you think it would be of interest.

Cheers,

Matt

On Tue, Apr 23, 2019 at 5:52 PM Andreas Herrmann wrote:

...

Dear GHC devs,

This year's ZuriHac 2019 [1] will again feature a dedicated GHC track to foster contributions to GHC and teach newcomers how to participate in GHC's development. It was a great success last year, and we hope it will be a great success this year as well.

For that we need your help: We would like to invite you to organize a session in the GHC track. This could be in form of a presentation, a workshop, or a hack session with topics centered around GHC.

For some inspiration, these are the subjects from last year's track: - Continuous Integration / DevOps, by Manual Chakravarty - PrimOps / PrimTypes, by Michal Terepeta - Performance Regression Tests, by Niklas Hambüchen - Newcomers Tutorial, by Andreas Herrmann

Other possible subjects could be around: - Improving documentation - Extending GHC's test-suite - General GHC development workflows - The inner workings of some aspect of GHC

Aside from preparing a session, we are also looking for volunteers to be around as GHC mentors during hack sessions to help out newcomers.

Please let us know if you'd be interested in leading a session, or being a mentor, or helping out with this track in any other way. You can contact either Niklas or myself, on this list or by private message.

Best, Niklas and Andreas ZuriHac 2019 GHC track coordinators

[1]: https://zfoh.ch/zurihac2019/ _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs

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If you're interested in the Haskell IDE story we've organised a specific room for that. I'm hoping Matthew will be able to spend some time in there too. Thanks, Neil On Tue, Jun 11, 2019 at 1:29 PM Bryan Richter wrote:

Re haskell-ide-engine: I've been meaning to try it out, so I'm interested in making progress on that branch this weekend, if someone can show me the ropes and suggest some goals.

On Tue, 11 Jun 2019, 10.18 Matthew Pickering, wrote:

...

I am writing a blog post concurrently with preparing my talk so I will post that afterwards.

I would have expected `dante` to work with the `./hadrian/ghci.sh` target. What goes wrong there?

The haskell-ide-engine support lives on a branch, which you are welcome to try, but comes with no guarantees. It is more than a proof of concept but less than fully production ready.

Matt

On Tue, Jun 11, 2019 at 7:29 AM Sven Tennie wrote:

...

Hey Matthew,

Could you do me a big favor and record/document this session? Unfortunately I won't make it to the ZuriHac, but I'm highly interested in improving my GHC workflow.

Currently I'm working in a cycle of:

1. read code in haskell-code-explorer [1] 2. modify it in Emacs (currently only syntax highlighting, no type checking) 3. look at ghcid if the types match 4. goto 1 or use hadrian to build

I guess this may be improved by the haskell-ide-engine.

Of course would it be amazing, if all talks could be recorded.

BTW - If any of the other readers has a better setup, please share. I found very little about IDE setup for GHC in the Wiki or Internet and the "standard" dante or intero approaches don't seem to work, at least not out of the box.

Best regards,

Sven

[1] - https://haskell-code-explorer.mfix.io/package/ghc-8.6.1/

Am Sa., 25. Mai 2019 um 13:08 Uhr schrieb Matthew Pickering :

...

Andreas/Niklas,

I can do a talk/demo of using tools such as `ghc-artefact-nix`, `haskell-ide-engine`, `ghcid`, GHC's debugger whilst working on GHC. Could you schedule in a 30 minute slot for that please if you think it would be of interest.

Cheers,

Matt

On Tue, Apr 23, 2019 at 5:52 PM Andreas Herrmann wrote:

...

Dear GHC devs,

This year's ZuriHac 2019 [1] will again feature a dedicated GHC track to foster contributions to GHC and teach newcomers how to participate in GHC's development. It was a great success last year, and we hope it will be a great success this year as well.

For that we need your help: We would like to invite you to organize a session in the GHC track. This could be in form of a presentation, a workshop, or a hack session with topics centered around GHC.

For some inspiration, these are the subjects from last year's track: - Continuous Integration / DevOps, by Manual Chakravarty - PrimOps / PrimTypes, by Michal Terepeta - Performance Regression Tests, by Niklas Hambüchen - Newcomers Tutorial, by Andreas Herrmann

Other possible subjects could be around: - Improving documentation - Extending GHC's test-suite - General GHC development workflows - The inner workings of some aspect of GHC

Aside from preparing a session, we are also looking for volunteers to be around as GHC mentors during hack sessions to help out newcomers.

Please let us know if you'd be interested in leading a session, or being a mentor, or helping out with this track in any other way. You can contact either Niklas or myself, on this list or by private message.

Best, Niklas and Andreas ZuriHac 2019 GHC track coordinators

[1]: https://zfoh.ch/zurihac2019/ _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs

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I have a ~ 30 minute talk which covers my GHC proposal (NoToplevelFieldSelectors), as well as parts of the renamer. I could hold that at any point, if there's still time slots over. Am Di., 28. Mai 2019 um 23:37 Uhr schrieb Ben Gamari :

Andreas Herrmann writes:

...

Dear GHC devs,

I've been rather quiet on this since it's been unclear whether I will be able to make it to ZuriHac this year. While I would love to be there (and perhaps do some hiking after), at this point chances are unfortunately looking rather slim; it looks like I may have contracted Lyme disease so international traveling likely isn't a good idea in the next couple of months.

I can, however, try to be around on IRC as festivities are underway.

Cheers,

- Ben

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Dear GHC devs, I'm happy to announce that thanks to your help we will have five very interesting talks at the GHC track at this year's ZuriHac. The sessions will be held in the Aula and will be recorded. The schedule is available on the ZuriHac website: https://zfoh.ch/zurihac2019/#ghc-track Next to the talks we've also reserved the joined rooms 1.219 & 1.221 for hacking on GHC. Whether you're interested in contributing to GHC or learning more about its internals, whether you're experienced and happy to share your knowledge or new to GHC and would like to learn from others, you're welcome to join us in those rooms. Join us in the #ghc channel on https://slack.zurihac.info/. We'll be communicating updates regarding the GHC track on that channel. And you're invited to discuss GHC related topics, ask questions, and provide answers on that channel. Best wishes and see you at ZuriHac, Andreas On Tue, 11 Jun 2019 at 14:14, Shayne Fletcher via ghc-devs < ghc-devs@haskell.org> wrote:

On Mon, Jun 10, 2019 at 10:11 PM Simon Hafner wrote:

...

I have a ~ 30 minute talk which covers my GHC proposal (NoToplevelFieldSelectors), as well as parts of the renamer. I could hold that at any point, if there's still time slots over.

That would be awesome. I sure hope there is!

-- *Shayne Fletcher* Language Engineer */* +1 917 699 7663 *Digital Asset* https://digitalasset.com/, creators of *DAML https://daml.com/*

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