double_conversion: add package

pkgs/development/libraries/double-conversion/default.nix

@@ -0,0 +1,30 @@
+{ stdenv, fetchurl, cmake }:
+
+stdenv.mkDerivation rec {
+  name = "double-conversion-1.1.5";
+
+  src = fetchurl {
+    url = "https://double-conversion.googlecode.com/files/${name}.tar.gz";
+    sha256 = "0hnlyn9r8vd9b3dafnk01ykz4k7bk6xvmvslv93as1cswf7vdvqv";
+  };
+
+  unpackPhase = ''
+    mkdir $name
+    cd $name
+    tar xzf $src
+  '';
+
+  nativeBuildInputs = [ cmake ];
+
+  cmakeFlags = [ "-DBUILD_SHARED_LIBS=ON" ];
+
+  enableParallelBuilding = true;
+
+  meta = with stdenv.lib; {
+    description = "Binary-decimal and decimal-binary routines for IEEE doubles";
+    homepage = https://code.google.com/p/double-conversion/;
+    license = licenses.bsd3;
+    platforms = platforms.unix;
+    maintainers = maintainers.abbradar;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -5005,6 +5005,8 @@ let
 
   dhex = callPackage ../applications/editors/dhex { };
 
+  double_conversion = callPackage ../development/libraries/double-conversion { };
+
   dclib = callPackage ../development/libraries/dclib { };
 
   dillo = callPackage ../applications/networking/browsers/dillo {