Add lz4: very fast lossless compression

pkgs/tools/compression/lz4/default.nix

@@ -0,0 +1,32 @@
+{ stdenv, fetchurl }:
+
+stdenv.mkDerivation rec {
+  # The r127 source still calls itself r126 everywhere, but I'm not going to
+  # patch over such silly cosmetic oversights in an official release. -- nckx
+  version = "127";
+  name = "lz4-${version}";
+
+  src = fetchurl {
+    url = "https://github.com/Cyan4973/lz4/archive/r${version}.tar.gz";
+    sha256 = "0hvbbr07j4hfix4dn4xw4fsmkr5s02bj596fn0i15d1i49xby2aj";
+  };
+
+  enableParallelBuilding = true;
+
+  makeFlags = "PREFIX=$(out)";
+
+  meta = with stdenv.lib; {
+    description = "Extremely fast compression algorithm";
+    longDescription = ''
+      Very fast lossless compression algorithm, providing compression speed
+      at 400 MB/s per core, with near-linear scalability for multi-threaded
+      applications. It also features an extremely fast decoder, with speed in
+      multiple GB/s per core, typically reaching RAM speed limits on
+      multi-core systems.
+    '';
+    homepage = https://code.google.com/p/lz4/;
+    license = with licenses; [ bsd2 gpl2Plus ];
+    platforms = with platforms; linux;
+    maintainers = with maintainers; [ nckx ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -1710,6 +1710,8 @@ let
 
   xz = callPackage ../tools/compression/xz { };
 
+  lz4 = callPackage ../tools/compression/lz4 { };
+
   lzop = callPackage ../tools/compression/lzop { };
 
   macchanger = callPackage ../os-specific/linux/macchanger { };