From 430e60233685b1da5ace0bca88db3e7a8f5ed1b2 Mon Sep 17 00:00:00 2001
From: Vincent Ambo <tazjin@google.com>
Date: Sun, 7 Jun 2020 17:14:48 +0100
Subject: [PATCH] feat(3p/grpc): Build gRPC using LLVM10 & libcxx

---
 third_party/default.nix      |  3 +--
 third_party/grpc/default.nix | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)
 create mode 100644 third_party/grpc/default.nix

diff --git a/third_party/default.nix b/third_party/default.nix
index 2286af193..b81c6a102 100644
--- a/third_party/default.nix
+++ b/third_party/default.nix
@@ -65,7 +65,6 @@ let
       go
       google-cloud-sdk
       graphviz
-      grpc
       gzip
       haskell
       iana-etc
@@ -163,7 +162,7 @@ in exposed.lib.fix(self: exposed // {
 
   # Packages to be overridden
   originals = {
-    inherit (nixpkgs) notmuch;
+    inherit (nixpkgs) grpc notmuch;
     inherit (stableNixpkgs) git;
     ffmpeg = nixpkgs.ffmpeg-full;
   };
diff --git a/third_party/grpc/default.nix b/third_party/grpc/default.nix
new file mode 100644
index 000000000..f76467dbd
--- /dev/null
+++ b/third_party/grpc/default.nix
@@ -0,0 +1,14 @@
+{ pkgs, ... }:
+
+(pkgs.originals.grpc.override {
+  protobuf = pkgs.protobuf;
+  stdenv = pkgs.llvmPackages.libcxxStdenv;
+}).overrideAttrs(orig: {
+  buildInputs = orig.buildInputs ++ [
+    pkgs.abseil_cpp
+  ];
+
+  cmakeFlags = orig.cmakeFlags ++ [
+    "-DgRPC_ABSL_PROVIDER=package"
+  ];
+})