I can see this magazine at https://lemmy.ml/c/haskell@kbin.social, but not at https://sopuli.xyz/c/haskell@kbin.social or https://programming.dev/c/haskell@kbin.social. I wonder why.

Sounds like that instance isn’t federated with kbin.social. I can see it just fine over here in infosec.pub

Strange. It does see https://sopuli.xyz/c/kbinMeta@kbin.social, but not https://sopuli.xyz/c/haskell@kbin.social

Maybe you can try reaching out to the admins as that error page suggests.

I suspect that comment predates the existence of capi and is trying to avoid having some other actual calling convention like stdcall because the function pointer is actually invoked from some C code in the RTS. capi is a sort of pseudo-calling-convention in that it generates some C code and then calls that stub.

Have you tried using a capi defined funptr there to see what happens?

I like to use https://www.libhunt.com/l/haskell to explore popular Haskell projects. The three projects with the most stars on GitHub are:

• ShellCheck, which checks shell scripts for potential problems
• Pandoc, which converts documents between different formats
• Postgrest, which serves a REST API from postgres databases

There's also the State of the Haskell Ecosystem page which rates the level of maturity of different use-cases and programming needs.