From 2b41b90ace980cfa1ed79b9e60893532f37037a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yannik=20B=C3=B6ttcher?= <yannikboettcher@outlook.de>
Date: Tue, 11 Jul 2023 21:25:13 +0200
Subject: [PATCH 1/2] opensycl: add maintainer

---
 maintainers/maintainer-list.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 1cc16179a1d..1d5487728a0 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -17935,6 +17935,12 @@
     githubId = 73759599;
     name = "Yaya";
   };
+  yboettcher = {
+    name = "Yannik Böttcher";
+    github = "yboettcher";
+    githubId = 39460066;
+    email = "yannikboettcher@outlook.de";
+  };
   ydlr = {
     name = "ydlr";
     email = "ydlr@ydlr.io";

From 925cfb87a3353c5dec4a9435fbb8ea7b9a9b10c9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yannik=20B=C3=B6ttcher?= <yannikboettcher@outlook.de>
Date: Tue, 11 Jul 2023 21:26:02 +0200
Subject: [PATCH 2/2] opensycl: init at 0.9.4

---
 .../compilers/opensycl/default.nix            | 67 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  3 +
 2 files changed, 70 insertions(+)
 create mode 100644 pkgs/development/compilers/opensycl/default.nix

diff --git a/pkgs/development/compilers/opensycl/default.nix b/pkgs/development/compilers/opensycl/default.nix
new file mode 100644
index 00000000000..d6f11798f19
--- /dev/null
+++ b/pkgs/development/compilers/opensycl/default.nix
@@ -0,0 +1,67 @@
+{ lib
+, fetchFromGitHub
+, llvmPackages_15
+, lld_15
+, rocm-device-libs
+, python3
+, rocm-runtime
+, cmake
+, boost
+, libxml2
+, libffi
+, makeWrapper
+, hip
+, rocmSupport ? false
+}:
+let
+  inherit (llvmPackages_15) stdenv;
+in
+stdenv.mkDerivation rec {
+  pname = "OpenSYCL";
+  version = "0.9.4";
+
+  src = fetchFromGitHub {
+    owner = "OpenSYCL";
+    repo = "OpenSYCL";
+    rev = "v${version}";
+    sha256 = "sha256-5YkuUOAnvoAD5xDKxKMPq0B7+1pb6hVisPAhs0Za1ls=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+    makeWrapper
+  ];
+
+  buildInputs = [
+    libxml2
+    libffi
+    boost
+    llvmPackages_15.openmp
+    llvmPackages_15.libclang.dev
+    llvmPackages_15.llvm
+  ] ++ lib.optionals rocmSupport [
+    hip
+    rocm-runtime
+  ];
+
+  # opensycl makes use of clangs internal headers. Its cmake does not successfully discover them automatically on nixos, so we supply the path manually
+  cmakeFlags = [
+    "-DCLANG_INCLUDE_PATH=${llvmPackages_15.libclang.dev}/include"
+  ];
+
+  postFixup = ''
+    wrapProgram $out/bin/syclcc-clang \
+      --prefix PATH : ${lib.makeBinPath [ python3 lld_15 ]} \
+      --add-flags "-L${llvmPackages_15.openmp}/lib" \
+      --add-flags "-I${llvmPackages_15.openmp.dev}/include" \
+  '' + lib.optionalString rocmSupport ''
+    --add-flags "--rocm-device-lib-path=${rocm-device-libs}/amdgcn/bitcode"
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/OpenSYCL/OpenSYCL";
+    description = "Multi-backend implementation of SYCL for CPUs and GPUs";
+    maintainers = with maintainers; [ yboettcher ];
+    license = licenses.bsd2;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index cc3904692e4..0b6dd1420c7 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16902,6 +16902,9 @@ with pkgs;
 
   opensmalltalk-vm = callPackage ../development/compilers/opensmalltalk-vm { };
 
+  opensycl = darwin.apple_sdk_11_0.callPackage ../development/compilers/opensycl { };
+  opensyclWithRocm = opensycl.override { rocmSupport = true; };
+
   ravedude = callPackage ../development/tools/rust/ravedude { };
 
   rhack = callPackage ../development/tools/rust/rhack { };