moved rhapsody-in-green off v3

common/optional/x86-64-v3/patches/abseil/default.nix

@@ -0,0 +1,38 @@
+# Abseil accepted the upstream fix: https://github.com/abseil/abseil-cpp/pull/2071
+# Keep this workaround until Electron, Deno's rusty_v8, and Signal's WebRTC
+# update their bundled Abseil copies to include it.
+{ prev }:
+let
+  patchAbseilBmi2Include =
+    package:
+    package.overrideAttrs (old: {
+      # GCC and Clang require the public umbrella header for BMI2 intrinsics.
+      patches = (old.patches or [ ]) ++ [ ./bmi2-public-header.patch ];
+    });
+
+  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;
+
+  signal-desktop = prev.signal-desktop.override {
+    electron_43 = electron43;
+    callPackage = signalCallPackage;
+  };
+}