<angerman>
jackdk: that's kinda odd though :-/ however it's just a warning. And you really want to set both -lssl and -lcrypto flags, and ideally repeat them.
<angerman>
linking is for almost all linker order based, unless you use (and the linker supports) some form of recursive linking e.g. \( -lfoo -lbar \)
<jackdk>
angerman: also gold said `/nix/store/.../bin/x86_64-unknown-linux-musl-ld.gold: error: cannot find -lssl`; am I missing some -L option somewhere?
<angerman>
jackdk: yes that's kinda odd, if it declares ssl as a dependency, the system libray mapping should bring the libraries into scope via -L
<jackdk>
angerman: so hw-kafka-client only declared rdkafka as a dependency, and does so using extra-libraries, not pkgconfig-depends, so I suspect it's not getting picked up by haskell.nix
<angerman>
i don't see rdkafka in there, I'm a bit confused how haskell.nix didn't warn about not being able to resolve rdkafka ?
<jackdk>
angerman: hw-kafka-client declares rdkafka, which is its nixpkgs name so I think that resolves. but then it doesn't declare transitive libs which i think is the problem here
<angerman>
ohh right. if the name matches that might work.
<angerman>
jackdk: you did try adding the crypto libs to the extra-lirbaries, right?
<jackdk>
angerman: yes, but only on my package that depends on hw-kafka-client. I may try switching hw-kafka-client to pkgconfig-depends
<jackdk>
angerman: the reason I think of pkgconfig-depends is that the rdkafka.pc file has `Requires.private: zlib libcrypto libssl libsasl2` so it actually declares its depends
<angerman>
fair
<jackdk>
(not that it worked, but it was worth a shot)
<jackdk>
angerman: this is absolutely disgusting: `ghc-options: -optl-lssl -optl-lcrypto` (straight `-lssl -lcrypto` puts them too early in the linker commandline) _and_ `extra-libraries: ssl` (so haskell.nix adds the library paths)
<angerman>
yuck... yea ghc could use some ordering feature where you could select where in the linker phase the library would end up.
<jackdk>
angerman: less disgusting is `extra-libraries: rdkafka ssl crypto` which reiterates the `-lrdkafka` but ensures `-lssl -lcrypto` after it
<jackdk>
I'll probably go with that, because I don't have it in me to fight this harder. TYVM for your help
<angerman>
jackdk: in haskell.nix you could fix it by adding the libs to the system-nixpkgs-map
<craige>
Would I be correct in thinking that Hakyll is not available via haskell.nix angerman ?
<angerman>
craige: is it on hackage? then it's in haskell.nix.
<angerman>
craige: otherwise if it has a website, you can fetch the source and run cabalProject on it :D
<jackdk>
angerman: adding `rdkafka = [ rdkafka openssl ];` to the system-nixpkgs-map doesn't help, because nothing is telling the linker to `-lssl` etc
<craige>
That's what I thought. Them I'll go back to working out what I'm doing wrong where I can pull in other things from `hackage`but not Hakyll :-)
<angerman>
jackdk: odd.
<angerman>
craige: is your haskell.nix (by extension hackage.nix) recent enough?
<angerman>
though I'd guess hakyll would be in there for a long time...
<jackdk>
angerman: why? the only declared `extra-libraries` in `hw-kafka-client` is `rdkafka`
<jackdk>
(and even if i change that to `pkgconfig-depends` it doesn't help because of that cabal bug
<craige>
As fresh as can be.
<angerman>
jackdk: fair. it would probably just bring it into scope :-/
<jackdk>
angerman: indeed.
* craige
is also toying with the haskell.nix flakes feature.
<angerman>
craige: something like this: `hello = (pkgs.haskell-nix.hackage-package { name = "hello"; version = "1.0.0.2"; inherit compiler-nix-name; }).getComponent "exe:hello";` except with hakyll :D
<angerman>
craige: I'm afraid I haven't used the flakes part yet. And I'm still not certain it won't bust our cross logic :(
<craige>
If I `s/hakyll/xmonad/` on line 49 then it successfully tries to build `xmonad`. With `hakyll` it claims `error: attribute 'hakyll' missing`.
<angerman>
hmm... I'm not sure what's up with tools, but you could try the line above I posted separate.
<angerman>
hello = (pkgs.haskell-nix.hackage-package { name = "hakyll"; version = "4.14.0.0"; compiler-nix-name = "ghc8104"; }).getComponent "exe:hakyll";
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<craige>
I'll give thata crack.
<craige>
Add that line evaluates at least. Is this worth further investigation or should I just tick the box and keeping with my pet projects? 😃
<craige>
So that did work of sorts - it got me back to the error that I started with: `Couldn't match expected type ‘Maybe Exp’ with actual type ‘Exp’` for `file-embed` so I'm going to say that worked 🤣
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