All credit to @sahrens for sharing fb's internal implementation.
clone rocksdb from https://github.com/facebook/rocksdb.
edit MakeFile inside rocksdb. Search for Platform-specific compilation around line 1122. Make th next few lines to look like this:
ifeq ($(PLATFORM), IOS)
# For iOS, create universal object files to be used on both the simulator and
| #I "../packages/" | |
| #r @"FSharp.Data/lib/net40/FSharp.Data.dll" | |
| #r @"StemmersNet/lib/net20/StemmersNet.dll" | |
| #r @"FSharp.Collections.ParallelSeq/lib/net40/FSharp.Collections.ParallelSeq.dll" | |
| #load "Utilities.fs" | |
| open FSharp.Data |
| Copyright 2013 Google Inc. All Rights Reserved. | |
| Licensed under the Apache License, Version 2.0 (the "License"); | |
| you may not use this file except in compliance with the License. | |
| You may obtain a copy of the License at | |
| http://www.apache.org/licenses/LICENSE-2.0 | |
| Unless required by applicable law or agreed to in writing, software | |
| distributed under the License is distributed on an "AS IS" BASIS, |
| # begin build properties | |
| # autogenerated by buildinfo.sh | |
| ro.build.id=JWR66N | |
| ro.build.display.id=JWR66N | |
| ro.build.version.incremental=711294 | |
| ro.build.version.sdk=18 | |
| ro.build.version.codename=REL | |
| ro.build.version.release=4.3 | |
| ro.build.date=Sat Jun 15 19:53:50 UTC 2013 | |
| ro.build.date.utc=1371326030 |
| /** | |
| * ShingleFilter class for Lucene.Net C# ported from Java version 2.9.2 org.apache.lucene.analysis.shingle.ShingleFilter.java | |
| * [Last updated: 07-16-2011] | |
| * | |
| * This version of the file is not complete. It produces System.SystemException: System.NullReferenceException when run. | |
| * | |
| * System.NullReferenceException: Object reference not set to an instance of an object. | |
| * at LuceneIndexer.ShingleFilter.FillShingleBuffer() in C:\Users\..\ShingleFilter.cs:line 381 * | |
| * | |
| * |