External STG Interpreter blog post

John Ericson john.ericson at obsidian.systems
Mon Apr 12 17:57:12 UTC 2021

Indeed it is!

I also am very much hoping this can be the missing piece we need to 
allow Template Haskell to work with a stage 0 GHC, so that we can safely 
use TH in GHC itself even when the ABI is changing. See 
https://github.com/ghc-proposals/ghc-proposals/issues/162 for details, 
where I've also linked Csaba's blog post. (And maybe also 
https://gitlab.haskell.org/ghc/ghc/-/wikis/cross-compilation/roadmap for 
more background, and related things like 

TH could perhaps be used to replace some of the ad-hoc code gen we have 
for e.g. RTS constants and primops. This in turn would simplify the 
build system, allowing for `cabal install ghc` to work without shipping 
generated Haskell code in the sdist.


On 4/12/21 4:51 AM, Simon Peyton Jones via ghc-devs wrote:
> That’s extremely impressive, Csaba.
> Maybe of interest to folk who have been thinking about “fat interface 
> files”.
> Simon
> *From:*ghc-devs <ghc-devs-bounces at haskell.org> *On Behalf Of *Csaba Hruska
> *Sent:* 10 April 2021 11:49
> *To:* GHC developers <ghc-devs at haskell.org>
> *Subject:* External STG Interpreter blog post
> Hello,
> I've written a blog post about GHC-WPC's external stg interpreter.
> https://www.patreon.com/posts/external-stg-49857800 
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.patreon.com%2Fposts%2Fexternal-stg-49857800&data=04%7C01%7Csimonpj%40microsoft.com%7C1535f88608f549dabb8108d8fc0e4c3f%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637536486264337310%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=VXa%2FhDs1ePRS5NTu04buv42yj%2BFKw%2FJzBLQJSwp8qTs%3D&reserved=0>
> Feedback is welcome.
> Cheers,
> Csaba
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