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-===========================================================================
-Building a JIT: Extreme Laziness - Using Compile Callbacks to JIT from ASTs
-===========================================================================
-
-.. contents::
-   :local:
-
-**This tutorial is under active development. It is incomplete and details may
-change frequently.** Nonetheless we invite you to try it out as it stands, and
-we welcome any feedback.
-
-Chapter 4 Introduction
-======================
-
-Welcome to Chapter 4 of the "Building an ORC-based JIT in LLVM" tutorial. This
-chapter introduces the Compile Callbacks and Indirect Stubs APIs and shows how
-they can be used to replace the CompileOnDemand layer from
-`Chapter 3 <BuildingAJIT3.html>`_ with a custom lazy-JITing scheme that JITs
-directly from Kaleidoscope ASTs.
-
-**To be done:**
-
-**(1) Describe the drawbacks of JITing from IR (have to compile to IR first,
-which reduces the benefits of laziness).**
-
-**(2) Describe CompileCallbackManagers and IndirectStubManagers in detail.**
-
-**(3) Run through the implementation of addFunctionAST.**
-
-Full Code Listing
-=================
-
-Here is the complete code listing for our running example that JITs lazily from
-Kaleidoscope ASTS. To build this example, use:
-
-.. code-block:: bash
-
-    # Compile
-    clang++ -g toy.cpp `llvm-config --cxxflags --ldflags --system-libs --libs core orcjit native` -O3 -o toy
-    # Run
-    ./toy
-
-Here is the code:
-
-.. literalinclude:: ../../examples/Kaleidoscope/BuildingAJIT/Chapter4/KaleidoscopeJIT.h
-   :language: c++
-
-`Next: Remote-JITing -- Process-isolation and laziness-at-a-distance <BuildingAJIT5.html>`_