forked from OSchip/llvm-project
Added Mac OS X build instructions and included the Linux build instructions
that Stephen Wilson sent out. llvm-svn: 128116
This commit is contained in:
Greg Clayton
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
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<link href="style.css" rel="stylesheet" type="text/css" />
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<title>LLDB FAQ</title>
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</head>
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<body>
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<div class="www_title">
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The <strong>LLDB</strong> Debugger
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</div>
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<div id="container">
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<div id="content">
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<!--#include virtual="sidebar.incl"-->
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<div id="middle">
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<div class="post">
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<h1 class ="postheader">Building LLDB on Mac OS X</h1>
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<div class="postcontent">
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<p>Building on Mac OS X is as easy as downloading the code and building the Xcode project or workspace:</p>
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<ul>
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<li><a href="download.html">Download</a> the lldb sources.</li>
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<li>Follow the code signing instructions in <b>lldb/docs/code-signing.txt</b></li>
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<li>In Xcode 3.x: <b>lldb/lldb.xcodeproj</b>, select the <b>lldb-tool</b> target, and build.</li>
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<li>In Xcode 4.x: <b>lldb/lldb.xcworkspace</b>, select the <b>lldb-tool</b> scheme, and build.</li>
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</ul>
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</div>
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<div class="postfooter"></div>
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</div>
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<div class="post">
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<h1 class ="postheader">Building LLDB on Linux</h1>
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<div class="postcontent">
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<p>This document describes the steps needed to compile LLDB on most Linux systems.</a></p>
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</div>
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<div class="postcontent">
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<h2>Preliminaries</h2>
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<p>LLDB relies on many of the technologies developed by the larger LLVM project.
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In particular, it requires both Clang and LLVM itself in order to build. Due to
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this tight integration the <em>Getting Started</em> guides for both of these projects
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come as prerequisite reading:</p>
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<ul>
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<li><a href="http://llvm.org/docs/GettingStarted.html">LLVM</a></li>
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<li><a href="http://clang.llvm.org/get_started.html">Clang</a></li>
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</ul>
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<p>In addition to any dependencies required by LLVM and Clang, LLDB needs a few
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development packages that may also need to be installed depending on your
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system. The current list of dependencies are:</p>
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<ul>
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<li><a href="http://swig.org">Swig</a></li>
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<li><a href="http://www.thrysoee.dk/editline">libedit</a></li>
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<li><a href="http://www.python.org">Python</a></li>
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</ul>
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<p>So for example, on a Fedora system one might say:</p>
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<code>> yum install swig python-devel libedit-devel</code>
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<h2 >Building LLDB</h2>
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<p>We first need to checkout the source trees into the appropriate locations. Both
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Clang and LLDB build as subprojects of LLVM. This means we will be checking out
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the source for both Clang and LLDB into the <tt>tools</tt> subdirectory of LLVM. We
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will be setting up a directory hierarchy looking something like this:</p>
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<p>
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<pre><tt>
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llvm
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`-- tools
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+-- clang
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`-- lldb
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</tt></pre>
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</p>
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<p>For reference, we will call the root of the LLVM project tree <tt>$llvm</tt>, and the
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roots of the Clang and LLDB source trees <tt>$clang</tt> and <tt>$lldb</tt> respectively.</p>
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<p>Change to the directory where you want to do development work and checkout LLVM:</p>
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<code>> svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm</code>
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<p>Now switch to LLVM’s tools subdirectory and checkout both Clang and LLDB:</p>
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<code>> cd $llvm/tools
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<br>> svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
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<br>> svn co http://llvm.org/svn/llvm-project/lldb/trunk lldb
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</code>
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<p>In general, LLDB requires specific revisions of both LLVM and Clang in order to
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build. This requirement insulates LLDB a bit from the constant development
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happening in both of these projects. The required revision can be discovered by
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consulting the Perl script <tt>$lldb/scripts/build-llvm.pl</tt> and locating the
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<tt>$llvm_revision</tt> variable. At the time of this writing, the required revision
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is <tt>r127682</tt>, so we might check and revert our LLVM and Clang trees to the
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required state as follows:</p>
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<code>> grep -m 1 llvm_revision $lldb/scripts/build-llvm.pl
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<br>our $llvm_revision = "127682";
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<br>> cd $clang
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<br>> svn update -r 127682
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<br>> cd $llvm
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<br>> svn update -r 127682</code>
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<p>It is highly recommended that you build the system out of tree. Create a second
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build directory and configure the LLVM project tree to your specifications as
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outlined in LLVM’s <em>Getting Started Guide</em>. For Linux development the x86
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backend and JIT compiler should be enabled. A typical build procedure might be:</p>
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<code>> cd $llvm/..
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<br>> mkdir build
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<br>> cd build
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<br>> $llvm/configure --enable-targets=x86 --enable-jit
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<br>> make</code>
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<p>Note that once both LLVM and Clang have been configured and built it is not
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necessary to perform a top-level <tt>make</tt> to rebuild changes made only to LLDB.
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You can build from the <tt>build/tools/lldb</tt> subdirectory as well.</p>
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<h2>Additional Notes</h2>
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<p>LLDB has a Python scripting capability and supplies it’s own Python module,
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<tt>lldb.py</tt>, built alongside the <tt>lldb</tt> binary. Python needs to know where to
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look for this module when LLDB starts up. There are two options available:</p>
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<ol class="arabic">
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<li>
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<p>Keep a copy of <tt>lldb.py</tt> in the current working directory when starting lldb.</p>
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</li>
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<li>
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<p>Set <tt>PYTHONPATH</tt> to point to the directory holding <tt>lldb.py</tt>.</p>
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</li>
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</ol>
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</div>
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<div class="postfooter"></div>
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</div>
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</div>
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</div>
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</div>
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</body>
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</html>
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@ -34,6 +34,7 @@
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<h1 class="headerbar">Source</h1>
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<ul>
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<li><a href="download.html">Download</a></li>
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<li><a href="build.html">Build</a></li>
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<li><a href="http://llvm.org/bugs">Bug Reports</a></li>
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<li><a href="http://llvm.org/svn/llvm-project/lldb/trunk">Browse SVN</a></li>
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<li><a href="http://llvm.org/viewvc/llvm-project/lldb/trunk">Browse ViewVC</a></li>
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