liquidfun: added google liquidfun (a box2d fork)

pkgs/development/libraries/liquidfun/default.nix

@@ -0,0 +1,50 @@
+{ stdenv, requireFile, cmake, mesa, libX11, libXi, ... }:
+
+let 
+  sourceInfo = rec {
+    version="1.1.0";
+    name="liquidfun-${version}";
+    url="http://github.com/foo/${name}.tar.gz";
+    hash="5011a000eacd6202a47317c489e44aa753a833fb562d970e7b8c0da9de01df86";
+  };
+
+in
+
+stdenv.mkDerivation rec {
+  src = requireFile {
+    url = sourceInfo.url;
+    sha256 = sourceInfo.hash;
+    name = sourceInfo.name + ".tar.gz";
+  };
+
+  inherit (sourceInfo) name version;
+  buildInputs = [ cmake mesa libX11 libXi ];
+
+  sourceRoot = "liquidfun/Box2D/";
+
+  preConfigurePhases = "preConfigure";
+
+  preConfigure = ''
+    sed -i Box2D/Common/b2Settings.h -e 's@b2_maxPolygonVertices .*@b2_maxPolygonVertices 15@'
+    substituteInPlace Box2D/CMakeLists.txt --replace "Common/b2GrowableStack.h" "Common/b2GrowableStack.h Common/b2GrowableBuffer.h"
+  '';
+      
+  configurePhase = ''
+    mkdir Build
+    cd Build; 
+    cmake -DBOX2D_INSTALL=ON -DBOX2D_BUILD_SHARED=ON -DCMAKE_INSTALL_PREFIX=$out ..
+  '';
+
+  meta = {
+    description = "2D physics engine based on Box2D";
+    maintainers = with stdenv.lib.maintainers;
+    [
+      qknight
+    ];
+    platforms = with stdenv.lib.platforms;
+      linux;
+    license = "bsd";
+    homepage = https://google.github.io/liquidfun/;
+  };
+}
+

pkgs/top-level/all-packages.nix

@@ -5527,6 +5527,8 @@ let
 
   lirc = callPackage ../development/libraries/lirc { };
 
+  liquidfun = callPackage ../development/libraries/liquidfun { };
+
   liquidwar = builderDefsPackage ../games/liquidwar {
     inherit (xlibs) xproto libX11 libXrender;
     inherit gmp mesa libjpeg