From 81e02cf02d183ad17f01cdfec9d26caa6c938bc6 Mon Sep 17 00:00:00 2001
From: Fernando J Pando <fernando.pando@stelligent.com>
Date: Thu, 21 Mar 2019 17:42:26 -0400
Subject: [PATCH] ethash: init at 0.4.2

- Tested on NixOS
---
 pkgs/development/libraries/ethash/default.nix | 58 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  2 +
 2 files changed, 60 insertions(+)
 create mode 100644 pkgs/development/libraries/ethash/default.nix

diff --git a/pkgs/development/libraries/ethash/default.nix b/pkgs/development/libraries/ethash/default.nix
new file mode 100644
index 000000000000..da2fd13465f2
--- /dev/null
+++ b/pkgs/development/libraries/ethash/default.nix
@@ -0,0 +1,58 @@
+{ stdenv, fetchFromGitHub, cmake, boost, cryptopp, opencl-headers, opencl-info,
+  openmpi, ocl-icd, mesa, gbenchmark, gtest }:
+
+stdenv.mkDerivation rec {
+  pname = "ethash";
+  version = "0.4.2";
+
+  src =
+    fetchFromGitHub {
+      owner = "chfast";
+      repo = "ethash";
+      rev = "v${version}";
+      sha256 = "0qiixvxbpl2gz7jh1qs8lmyk7wzv6ffnl7kckqgrpgm547nnn8zy";
+    };
+
+  nativeBuildInputs = [
+    cmake
+  ];
+
+  buildInputs = [
+    boost
+    cryptopp
+    opencl-headers
+    opencl-info
+    openmpi
+    ocl-icd
+    mesa
+  ];
+
+  checkInputs = [
+    gbenchmark
+    gtest
+  ];
+
+  #preConfigure = ''
+  #  sed -i 's/GTest::main//' test/unittests/CMakeLists.txt
+  #  cat test/unittests/CMakeLists.txt
+  #  ln -sfv ${gtest.src}/googletest gtest
+  #'';
+
+  # NOTE: disabling tests due to gtest issue
+  cmakeFlags = [
+    "-DHUNTER_ENABLED=OFF"
+    "-DETHASH_BUILD_TESTS=OFF"
+    #"-Dbenchmark_DIR=${gbenchmark}/lib/cmake/benchmark"
+    #"-DGTest_DIR=${gtest.dev}/lib/cmake/GTest"
+    #"-DGTest_DIR=${gtest.src}/googletest"
+    #"-DCMAKE_PREFIX_PATH=${gtest.dev}/lib/cmake"
+  ];
+
+  meta = with stdenv.lib; {
+    description = "PoW algorithm for Ethereum 1.0 based on Dagger-Hashimoto";
+    homepage = https://github.com/ethereum/ethash;
+    platforms = [ "x86_64-linux" ];
+    maintainers = with maintainers; [ nand0p ];
+    license = licenses.asl20;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f4586e299d6e..e2e94823b638 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2011,6 +2011,8 @@ in
 
   colormake = callPackage ../development/tools/build-managers/colormake { };
 
+  ethash = callPackage ../development/libraries/ethash { };
+
   cpuminer = callPackage ../tools/misc/cpuminer { };
 
   cpuminer-multi = callPackage ../tools/misc/cpuminer-multi { };