zlib doesn't build with nix-build -A exe --no-out-link #1068
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zlib links against a C library (zlib). I don’t think it is possible to use zlib with ghcjs. |
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Are you sure? I have found a few references to zlib being used with GHCJS online, and it seems like there are some special build instructions for building it: https://github.com/haskell/zlib/blob/master/zlib.cabal#L70C1-L74C55 |
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I tried sidestepping this issue by using the HTTP package instead, but that package fails because the host system |
Ah, interesting. Then maybe the issue is simply that the used nix derivation is for the default platform and thus still has a c-zlib dependency. Maybe you can fix that with an override |
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When I put that inside I get the following error: |
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Funny enough, it's failing when compiling for the backend. I get the same error when running |
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Running |
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Well, I think you need to make this override conditional on the compiler being ghcjs. Something like |
The override needs to be something like |
I see, thank you, I made a typo in the original file, I'm building it with |
I didn't know you could do that, I will give it a shot, thanks! |
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Using building with |
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Well maybe the same issue now? network doesn't sound like something which should be in the dependency closure of a js app? |
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Yes, maybe I will have to split my project into two parts, one for frontend and another for backend. It seems like when specifying the frontend part as a library within the same cabal file, running |
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It seems like |
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I stopped the dependencies from being built by simply using Cabal conditional statements: It seems a bit hacky compared to having two library definitions, but it's the only thing I have gotten to work. Thanks so much for all the help @maralorn! Should I close this? |
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Thanks @maralorn! |
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Hello!
I recently introduced a library that depends on
zlibto my website. Runningob runworks fine, but compiling it withnix-build -A exe --no-out-linkresults in the following error:I think it's related to GHCJS or some sort of cross compilation.
I haven't found a solution yet.
I found some relevant issues, for instance: https://stackoverflow.com/questions/66005898/haskell-ghcjs-with-diagrams-gives-error-no-c-compiler-provided-for-this-platfor
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