Add libkeyfinder: musical key detection library

pkgs/development/libraries/libkeyfinder/default.nix

@@ -0,0 +1,39 @@
+{ stdenv, fetchFromGitHub, boost, fftw, qt5 }:
+
+stdenv.mkDerivation rec {
+  version = "0.11.0-20141105";
+  name = "libkeyfinder-${version}";
+
+  src = fetchFromGitHub {
+    repo = "libKeyFinder";
+    owner = "ibsh";
+    rev = "592ef1f3d3ada489f80814d5ccfbc8de6029dc9d";
+    sha256 = "0xcqpizwbn6wik3w7h9k1lvgrp3r3w6yyy55flvnwwwgvkry48as";
+  };
+
+  meta = with stdenv.lib; {
+    description = "Musical key detection for digital audio (C++ library)";
+    homepage = http://www.ibrahimshaath.co.uk/keyfinder/;
+    license = with licenses; gpl3Plus;
+    platforms = with platforms; linux;
+    maintainers = with maintainers; [ nckx ];
+  };
+
+  buildInputs = [ fftw qt5 ];
+  propagatedBuildInputs = [ boost ];
+
+  patchPhase = ''
+    substituteInPlace LibKeyFinder.pro --replace "/usr/local" "$out"
+  '';
+
+  configurePhase = ''
+    qmake
+  '';
+
+  enableParallelBuilding = true;
+
+  postInstall = ''
+    mkdir -p $out/include/keyfinder
+    cp *.h $out/include/keyfinder
+  '';
+}

pkgs/top-level/all-packages.nix

@@ -6172,6 +6172,8 @@ let
 
   libkate = callPackage ../development/libraries/libkate { };
 
+  libkeyfinder = callPackage ../development/libraries/libkeyfinder { };
+
   libksba = callPackage ../development/libraries/libksba { };
 
   libmad = callPackage ../development/libraries/libmad { };