From 53fd52dca90798b0fae2bb5381e3f4e3bcb73a57 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebasti=C3=A1n=20Mancilla?= <smancill@smancill.dev>
Date: Thu, 18 Nov 2021 13:43:52 -0300
Subject: [PATCH] stxxl: fix build on darwin

Do not enable OpenMP support on Darwin. Since GNU Parallel requires
OpenMP, also disable it on Darwin.
---
 pkgs/development/libraries/stxxl/default.nix | 7 ++++---
 pkgs/top-level/all-packages.nix              | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/libraries/stxxl/default.nix b/pkgs/development/libraries/stxxl/default.nix
index 5cc0e6037a23..391424ee2c93 100644
--- a/pkgs/development/libraries/stxxl/default.nix
+++ b/pkgs/development/libraries/stxxl/default.nix
@@ -2,7 +2,7 @@
 , stdenv
 , fetchFromGitHub
 , cmake
-, parallel ? true
+, parallelSupport ? (!stdenv.isDarwin)
 }:
 
 let
@@ -25,11 +25,12 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=ON"
     "-DBUILD_STATIC_LIBS=OFF"
-    (mkFlag parallel "USE_GNU_PARALLEL")
+    (mkFlag parallelSupport "USE_GNU_PARALLEL")
+    (mkFlag parallelSupport "USE_OPENMP")
   ];
 
   passthru = {
-    inherit parallel;
+    inherit parallelSupport;
   };
 
   meta = with lib; {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 5de60fe4c638..4aa26ab206e4 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19675,7 +19675,7 @@ with pkgs;
 
   StormLib = callPackage ../development/libraries/StormLib { };
 
-  stxxl = callPackage ../development/libraries/stxxl { parallel = true; };
+  stxxl = callPackage ../development/libraries/stxxl { };
 
   sqlite = lowPrio (callPackage ../development/libraries/sqlite { });