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20 lines
1.0 KiB
Nix
20 lines
1.0 KiB
Nix
{ haskellNix }:
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pkgs:
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let
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inherit (pkgs.stdenv) buildPlatform hostPlatform targetPlatform;
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nativePackages = import ./native-packages.nix { inherit haskellNix; };
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# Extending a buildPackages splice can restore its parent cross compiler.
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# Start native compiler selection from a fresh native set so Cabal's build
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# tools see the installed boot libraries, rather than an empty target DB.
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# Compare full triples: a GNU-to-musl cross has the same system string.
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compilerPkgs = if buildPlatform.config == hostPlatform.config
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&& buildPlatform.config == targetPlatform.config
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then nativePackages buildPlatform.system
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else pkgs;
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in
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# Hydra's compiler builds use this overlay. Its pkg-config metadata changes
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# the Cabal build tool's hash, and therefore every compiler slice's hash.
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# Keep that context inside compiler selection: application dependencies still
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# use the project's package set and its current libsodium mapping.
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(compilerPkgs.appendOverlays [ (import (haskellNix + "/test/overlay.nix")) ]).haskell-nix.compiler
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