dotfiles/overlays/x86-64-v3-workarounds.nix

# Compatibility fixes for packages rebuilt with x86-64-v3.
#
# The v3 baseline enables instructions that expose source assumptions hidden
# by the generic x86-64 build. Keep compile fixes here, separate from test
# exclusions, until upstream or nixpkgs incorporates them.
_final: prev:
let
  patchAbseilBmi2Include =
    package:
    package.overrideAttrs (old: {
      # GCC and Clang prohibit including their internal BMI2 header directly.
      # The public umbrella provides the same intrinsics with the required
      # compiler setup.
      postPatch = (old.postPatch or "") + ''
        substituteInPlace third_party/abseil-cpp/absl/container/internal/raw_hash_set.h \
          --replace-fail "#include <bmi2intrin.h>" "#include <immintrin.h>"
      '';
    });

  removeSiblingOutputChecks =
    package:
    package.overrideAttrs (old: {
      # Nix 2.34 can validate a partial multi-output rebuild against only the
      # outputs still being realised. PostgreSQL's checks then reject valid
      # sibling names such as "out" and "lib". Keep the test suite and
      # disallowed-requisite checks; accept the loss of cross-output checks.
      outputChecks = builtins.mapAttrs (
        _output: checks: builtins.removeAttrs checks [ "disallowedReferences" ]
      ) (old.outputChecks or { });
    });

  electron43Unwrapped = patchAbseilBmi2Include prev.electron_43.unwrapped;
  electron43 = prev.electron_43.override {
    electron-unwrapped = electron43Unwrapped;
  };

  signalCallPackage =
    path: args:
    let
      package = prev.callPackage path args;
    in
    if builtins.baseNameOf path == "webrtc.nix" then patchAbseilBmi2Include package else package;
in
prev.lib.optionalAttrs ((prev.stdenv.hostPlatform.gcc.arch or null) == "x86-64-v3") {
  deno =
    let
      librusty_v8 = patchAbseilBmi2Include prev.deno.passthru.librusty_v8;
    in
    prev.deno.override { inherit librusty_v8; };

  electron_43 = electron43;

  postgresql = removeSiblingOutputChecks prev.postgresql;
  postgresql_18 = removeSiblingOutputChecks prev.postgresql_18;

  signal-desktop = prev.signal-desktop.override {
    electron_43 = electron43;
    callPackage = signalCallPackage;
  };
}