Add aocc compiler

pkgs/aocc/unwrapped.nix

@@ -0,0 +1,52 @@
+{
+  lib,
+  fetchurl,
+  stdenv,
+  autoPatchelfHook,
+  rocmPackages,
+  zlib,
+  libffi,
+  elfutils,
+}:
+
+let
+  # in newer nixpkgs the runtime is hsakmt
+  rocmRuntime = if rocmPackages ? hsakmt then rocmPackages.hsakmt else rocmPackages.rocm-runtime;
+in
+stdenv.mkDerivation {
+  pname = "aocc-compiler";
+  version = "5.0.0";
+
+  src = fetchurl {
+    url = "https://download.amd.com/developer/eula/aocc/aocc-5-0/aocc-compiler-5.0.0.tar";
+    sha256 = "sha256-lm+sLSx1np3m6WnBCtp6ezBsET9/HgfqN2gp7IY4Dao=";
+  };
+
+  nativeBuildInputs = [ autoPatchelfHook ];
+  buildInputs = [
+    elfutils
+    zlib
+    rocmRuntime
+    stdenv.cc.cc.lib
+  ];
+  phases = [
+    "unpackPhase"
+    "installPhase"
+    "fixupPhase"
+  ];
+  dontStrip = true;
+
+  installPhase = ''
+    mkdir -p $out
+    cp -a . $out/
+
+    ln -s ${lib.getLib libffi}/lib/libffi.so $out/lib/libffi.so.6
+  '';
+
+  passthru = {
+    inherit rocmRuntime;
+    isClang = true; # Needed for wrapCCWith
+  };
+
+  meta.mainProgram = "clang";
+}