1 files changed, 53 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/llvm/common/libclc.nix b/nixpkgs/pkgs/development/compilers/llvm/common/libclc.nix
new file mode 100644
index 000000000000..c91930963b20
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/llvm/common/libclc.nix
@@ -0,0 +1,53 @@
+{ lib, stdenv, version, runCommand, monorepoSrc, llvm, buildPackages, buildLlvmTools, ninja, cmake, python3 }:
+
+stdenv.mkDerivation rec {
+  pname = "libclc";
+  inherit version;
+
+  src = runCommand "${pname}-src-${version}" {} ''
+    mkdir -p "$out"
+    cp -r ${monorepoSrc}/cmake "$out"
+    cp -r ${monorepoSrc}/${pname} "$out"
+  '';
+
+  sourceRoot = "${src.name}/${pname}";
+
+  outputs = [ "out" "dev" ];
+
+  patches = [
+    ./libclc/libclc-gnu-install-dirs.patch
+  ];
+
+  # cmake expects all required binaries to be in the same place, so it will not be able to find clang without the patch
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace 'find_program( LLVM_CLANG clang PATHS ''${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH )' \
+                'find_program( LLVM_CLANG clang PATHS "${buildLlvmTools.clang.cc}/bin" NO_DEFAULT_PATH )' \
+      --replace 'find_program( LLVM_AS llvm-as PATHS ''${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH )' \
+                'find_program( LLVM_AS llvm-as PATHS "${buildLlvmTools.llvm}/bin" NO_DEFAULT_PATH )' \
+      --replace 'find_program( LLVM_LINK llvm-link PATHS ''${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH )' \
+                'find_program( LLVM_LINK llvm-link PATHS "${buildLlvmTools.llvm}/bin" NO_DEFAULT_PATH )' \
+      --replace 'find_program( LLVM_OPT opt PATHS ''${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH )' \
+                'find_program( LLVM_OPT opt PATHS "${buildLlvmTools.llvm}/bin" NO_DEFAULT_PATH )' \
+      --replace 'find_program( LLVM_SPIRV llvm-spirv PATHS ''${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH )' \
+                'find_program( LLVM_SPIRV llvm-spirv PATHS "${buildPackages.spirv-llvm-translator.override { inherit (buildLlvmTools) llvm; }}/bin" NO_DEFAULT_PATH )'
+  '' + lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
+    substituteInPlace CMakeLists.txt \
+      --replace 'COMMAND prepare_builtins' 'COMMAND ${buildLlvmTools.libclc.dev}/bin/prepare_builtins'
+  '';
+
+  nativeBuildInputs = [ cmake ninja python3 ];
+  buildInputs = [ llvm ];
+  strictDeps = true;
+
+  postInstall = ''
+    install -Dt $dev/bin prepare_builtins
+  '';
+
+  meta = with lib; {
+    homepage = "http://libclc.llvm.org/";
+    description = "Implementation of the library requirements of the OpenCL C programming language";
+    license = licenses.mit;
+    platforms = platforms.all;
+  };
+}