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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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<head>
<META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>KLEE - Getting Started</title>
<link type="text/css" rel="stylesheet" href="menu.css" />
<link type="text/css" rel="stylesheet" href="content.css" />
</head>
<body>
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<div id="content">
<h1>Getting Started: Building and Running KLEE</h1>
<!-- <p>FIXME: Intro and disclaimer.</p> -->
<h2 id="build">Building KLEE</h2>
<p>If you would like to try KLEE, the current procedure for building is
below.</p>
KLEE is built on LLVM; the first steps are to get a working LLVM
installation. See <a href="http://llvm.org/docs/GettingStarted.html">Getting
Started with the LLVM System</a> for more information.
<p><b>NOTE:</b> KLEE is only currently tested on Linux and Darwin x86-32
targets, using LLVM top-of-tree. KLEE will not work with an older LLVM (e.g.,
2.5). We are currently working on full support for Linux and Darwin x86-64
targets.<p>
<ol>
<li>Install llvm-gcc:
<ul>
<li>Download and install the LLVM 2.5 release of <tt>llvm-gcc</tt>
from <a href="http://llvm.org/releases/download.html">here</a>. Add
<tt>llvm-gcc</tt> to your <tt>PATH</tt>. It is important to do this first
so that <tt>llvm-gcc</tt> is found in subsequent <tt>configure</tt>
steps. <tt>llvm-gcc</tt> will be used later to compile programs that KLEE
can execute.</li>
</ul>
</li>
<li><a href="http://www.llvm.org/docs/GettingStarted.html#checkout">Checkout
and build LLVM</a> from SVN head (LLVM 2.5 will not work):
<div class="instr">
$ svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm <br>
$ cd llvm <br>
$ ./configure --enable-optimized <br>
$ make
</div>
(the <tt>--enable-optimized</tt> configure argument is not necessary, but
KLEE runs very slowly in Debug mode).
</li>
<li>Checkout KLEE (to any path you like):
<div class="instr">
$ svn co http://llvm.org/svn/llvm-project/klee/trunk klee
</div>
</li>
<li>Configure KLEE (from the KLEE source directory):
<div class="instr">
$ ./configure --with-llvm=<i>path/to/llvm</i>
</div>
<p>This assumes that you compiled LLVM in-place. If you used a
different directory for the object files then use:
<div class="instr">
$ ./configure --with-llvmsrc=<i>path/to/llvm/src</i> --with-llvmobj=<i>path/to/llvm/obj</i>
</div>
</li>
<li>Build KLEE (from the KLEE source directory):
<div class="instr">
$ make ENABLE_OPTIMIZED=1
</div>
</li>
<li>Run the regression suite to verify your build:
<div class="instr">
$ make check<br>
$ make unittests<br>
</div>
</li>
<li>You're ready to go! Go to the <a href="Tutorials.html">Tutorials</a> page
to try KLEE.</li>
</ol>
<h2 id="uclib">Building KLEE with POSIX runtime support</h2>
<p>The steps above are enough for building and testing KLEE on closed programs
(programs that don't use any external code such as C library
functions). However, if you want to use KLEE to run real programs you will want
to enable the KLEE POSIX runtime, which is built on top of the uClibc C
library.</p>
<ol>
<li>Download KLEE's uClibc:
<ul>
<li>
KLEE uses a version of <a href="http://uclibc.org">uClibc</a> which has
been modified slightly for use with KLEE. It is available for download
here: <a href="http://t1.minormatter.com/~ddunbar/klee-uclibc-0.01.tgz">klee-uclibc-0.01.tgz</a>.
</li>
</ul>
</li>
<li>Build uClibc with <tt>llvm-gcc</tt>:
<div class="instr">
$ tar zxvf klee-uclibc-0.01.tgz <br>
$ ./configure --with-llvm=<i>path/to/llvm</i> <br>
$ make <br>
</div>
<p><b>NOTE:</b> KLEE's uClibc is shipped in a pre-configured for x86-32. If
you are on a different target (e.g. x86-64), you will need to run 'make
config' and select the correct target. The defaults for the other uClibc
configuration variables should be fine.<p>
</li>
<li>Configure KLEE with uClibc/POSIX support:
<div class="instr">
$ ./configure --with-llvm=<i>path/to/llvm</i> --with-uclibc=<i>path/to/klee-uclibc</i> --enable-posix-runtime
</div>
</li>
<li>Rebuild KLEE and run <tt>make check</tt> and verify that the POSIX tests
run correctly.
</li>
</ol>
</div>
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