lc0: 0.31.2 -> 0.32.1 (#518190)

pkgs/by-name/lc/lc0/package.nix

@@ -9,20 +9,28 @@
   zlib,
   gtest,
   eigen,
+  abseil-cpp,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "lc0";
-  version = "0.31.2";
+  version = "0.32.1";
 
   src = fetchFromGitHub {
     owner = "LeelaChessZero";
     repo = "lc0";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-8watDDxSyZ5khYqpXPyjQso2MkOzfI6o2nt0vkuiEUI=";
+    hash = "sha256-Dvq698ZfYumoax7i1nN5GwTQKXgby9+TdTZT6C7/jgc=";
     fetchSubmodules = true;
   };
 
+  postPatch = ''
+    substituteInPlace meson.build \
+      --replace-fail "absl = subproject('abseil-cpp', default_options : ['warning_level=0', 'cpp_std=c++20'])" "" \
+      --replace-fail "deps += absl.get_variable('absl_container_dep').as_system()" "deps += [dependency('absl_flat_hash_map'), dependency('absl_cleanup'), dependency('absl_base')]" \
+      --replace-fail "if eigen_dep.found() and cc.has_header('Eigen/Core')" "if eigen_dep.found()"
+  '';
+
   patchPhase = ''
     runHook prePatch
 
@@ -44,6 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
     eigen
     gtest
     zlib
+    abseil-cpp
   ];
 
   mesonFlags = [
@@ -57,6 +66,8 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
+  doCheck = true;
+
   meta = {
     homepage = "https://lczero.org/";
     description = "Open source neural network based chess engine";