tunefish: init at unstable 2020-08-13 (NixOS#96539)

Fails to build on aarch64 due to the use of x86 intrinsics.

pkgs/applications/audio/tunefish/default.nix

@@ -0,0 +1,43 @@
+{ stdenv, fetchFromGitHub, pkg-config, python3
+, alsaLib, curl, freetype, gtk3, libGL, libX11, libXext, libXinerama, webkitgtk
+}:
+
+stdenv.mkDerivation {
+  pname = "tunefish";
+  version = "unstable-2020-08-13";
+
+  src = fetchFromGitHub {
+    owner = "jpcima";
+    repo = "tunefish";
+    rev = "b3d83cc66201619f6399500f6897fbeb1786d9ed";
+    fetchSubmodules = true;
+    sha256 = "0rjpq3s609fblzkvnc9729glcnfinmxljh0z8ldpzr245h367zxh";
+  };
+
+  nativeBuildInputs = [ pkg-config python3 ];
+  buildInputs = [ alsaLib curl freetype gtk3 libGL libX11 libXext libXinerama webkitgtk ];
+
+  postPatch = ''
+    patchShebangs src/tunefish4/generate-lv2-ttl.py
+  '';
+
+  makeFlags = [
+    "-C" "src/tunefish4/Builds/LinuxMakefile"
+    "CONFIG=Release"
+  ];
+
+  installPhase = ''
+    mkdir -p $out/lib/lv2
+    cp -r src/tunefish4/Builds/LinuxMakefile/build/Tunefish4.lv2 $out/lib/lv2
+  '';
+
+  enableParallelBuilding = true;
+
+  meta = with stdenv.lib; {
+    homepage = "https://tunefish-synth.com/";
+    description = "Virtual analog synthesizer LV2 plugin";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ orivej ];
+    platforms = [ "x86_64-linux" ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -23392,6 +23392,10 @@ in
 
   tudu = callPackage ../applications/office/tudu { };
 
+  tunefish = callPackage ../applications/audio/tunefish {
+    stdenv = clangStdenv; # https://github.com/jpcima/tunefish/issues/4
+  };
+
   tut = callPackage ../applications/misc/tut { };
 
   tuxguitar = callPackage ../applications/editors/music/tuxguitar { };