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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Installation</title>
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<meta name="Author" content="Mike Pall">
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<body>
<div id="site">
<a href="http://luajit.org"><span>Lua<span id="logo">JIT</span></span></a>
</div>
<div id="head">
<h1>Installation</h1>
</div>
<div id="nav">
<ul><li>
<a href="luajit.html">LuaJIT</a>
<ul><li>
<a class="current" href="install.html">Installation</a>
</li><li>
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<div id="main">
<p>
LuaJIT is only distributed as a source package. This page explains
how to build and install LuaJIT with different operating systems
and C compilers.
</p>
<p>
For the impatient (on POSIX systems):
</p>
<pre class="code">
make && sudo make install
</pre>
<p>
LuaJIT currently builds out-of-the box on most x86 or x64 systems.
Here's the compatibility matrix for the supported combinations of
operating system, CPU and compilers:
</p>
<table class="compat">
<tr class="compathead">
<td class="compatos">Operating system</td>
<td class="compatcc">x86 (32 bit)</td>
<td class="compatcc">x64 (64 bit)</td>
</tr>
<tr class="odd separate">
<td class="compatos">Linux</td>
<td class="compatcc">GCC 4.x<br>GCC 3.4</td>
<td class="compatcc">GCC 4.x</td>
</tr>
<tr class="even">
<td class="compatos">Windows 98/XP/Vista/7</td>
<td class="compatcc">MSVC (EE)<br>Windows SDK<br>MinGW (GCC)<br>Cygwin (GCC)</td>
<td class="compatcc">MSVC + SDK v7.0<br>Windows SDK v7.0</td>
</tr>
<tr class="odd">
<td class="compatos">OSX 10.3-10.6</td>
<td class="compatcc">GCC 4.x<br>GCC 3.4</td>
<td class="compatcc">GCC 4.x</td>
</tr>
<tr class="even">
<td class="compatos">*BSD, other</td>
<td class="compatcc">GCC 4.x<br>GCC 3.4</td>
<td class="compatcc">(not supported)</td>
</tr>
</table>
<h2>Configuring LuaJIT</h2>
<p>
The standard configuration should work fine for most installations.
Usually there is no need to tweak the settings. The following files
hold all user-configurable settings:
</p>
<ul>
<li><tt>src/luaconf.h</tt> sets some configuration variables.</li>
<li><tt>Makefile</tt> has settings for <b>installing</b> LuaJIT (POSIX
only).</li>
<li><tt>src/Makefile</tt> has settings for <b>compiling</b> LuaJIT
under POSIX, MinGW and Cygwin.</li>
<li><tt>src/msvcbuild.bat</tt> has settings for compiling LuaJIT with
MSVC.</li>
</ul>
<p>
Please read the instructions given in these files, before changing
any settings.
</p>
<h2 id="posix">POSIX Systems (Linux, OSX, *BSD etc.)</h2>
<h3>Prerequisites</h3>
<p>
Depending on your distribution, you may need to install a package for
GCC (GCC 3.4 or later required), the development headers and/or a
complete SDK. E.g. on a current Debian/Ubuntu, install <tt>libc6-dev</tt>
with the package manager.
</p>
<p>
Download the current source package (pick the .tar.gz), if you haven't
already done so. Move it to a directory of your choice, open a
terminal window and change to this directory. Now unpack the archive
and change to the newly created directory:
</p>
<pre class="code">
tar zxf LuaJIT-2.0.0-beta3.tar.gz
cd LuaJIT-2.0.0-beta3</pre>
<h3>Building LuaJIT</h3>
<p>
The supplied Makefiles try to auto-detect the settings needed for your
operating system and your compiler. They need to be run with GNU Make,
which is probably the default on your system, anyway. Simply run:
</p>
<pre class="code">
make
</pre>
<p>
This always builds a native x86 or x64 binary, depending on your OS.
</p>
<p>
By default modules are only searched under the prefix <tt>/usr/local</tt>.
You can add an extra prefix to the search paths by appending the
<tt>PREFIX</tt> option, e.g.:
</p>
<pre class="code">
make PREFIX=/home/myself/lj2
</pre>
<p>
Note for OSX: <tt>MACOSX_DEPLOYMENT_TARGET</tt> is set to <tt>10.4</tt>
in <tt>src/Makefile</tt>. Change it, if you want to build on an older version.
</p>
<h3>Installing LuaJIT</h3>
<p>
The top-level Makefile installs LuaJIT by default under
<tt>/usr/local</tt>, i.e. the executable ends up in
<tt>/usr/local/bin</tt> and so on. You need root privileges
to write to this path. So, assuming sudo is installed on your system,
run the following command and enter your sudo password:
</p>
<pre class="code">
sudo make install
</pre>
<p>
Otherwise specify the directory prefix as an absolute path, e.g.:
</p>
<pre class="code">
make install PREFIX=/home/myself/lj2
</pre>
<p>
Obviously the prefixes given during build and installation need to be the same.
</p>
<p style="color: #c00000;">
Note: to avoid overwriting a previous version, the beta test releases
only install the LuaJIT executable under the versioned name (i.e.
<tt>luajit-2.0.0-beta3</tt>). You probably want to create a symlink
for convenience, with a command like this:
</p>
<pre class="code" style="color: #c00000;">
sudo ln -sf luajit-2.0.0-beta3 /usr/local/bin/luajit
</pre>
<h2 id="windows">Windows Systems</h2>
<h3>Prerequisites</h3>
<p>
Either install one of the open source SDKs
(<a href="http://mingw.org/"><span class="ext">»</span> MinGW</a> or
<a href="http://www.cygwin.com/"><span class="ext">»</span> Cygwin</a>), which come with a modified
GCC plus the required development headers.
</p>
<p>
Or install Microsoft's Visual C++ (MSVC). The freely downloadable
<a href="http://www.microsoft.com/Express/VC/"><span class="ext">»</span> Express Edition</a>
works just fine, but only contains an x86 compiler.
</p>
<p>
The freely downloadable
<a href="http://msdn.microsoft.com/en-us/windowsserver/bb980924.aspx"><span class="ext">»</span> Windows SDK</a>
only comes with command line tools, but this is all you need to build LuaJIT.
It contains x86 and x64 compilers.
</p>
<p>
Next, download the source package and unpack it using an archive manager
(e.g. the Windows Explorer) to a directory of your choice.
</p>
<h3>Building with MSVC</h3>
<p>
Open a "Visual Studio .NET Command Prompt", <tt>cd</tt> to the
directory where you've unpacked the sources and run these commands:
</p>
<pre class="code">
cd src
msvcbuild
</pre>
<p>
Then follow the installation instructions below.
</p>
<h3>Building with the Windows SDK</h3>
<p>
Open a "Windows SDK Command Shell" and select the x86 compiler:
</p>
<pre class="code">
setenv /release /x86
</pre>
<p>
Or select the x64 compiler:
</p>
<pre class="code">
setenv /release /x64
</pre>
<p>
Then <tt>cd</tt> to the directory where you've unpacked the sources
and run these commands:
</p>
<pre class="code">
cd src
msvcbuild
</pre>
<p>
Then follow the installation instructions below.
</p>
<h3>Building with MinGW or Cygwin</h3>
<p>
Open a command prompt window and make sure the MinGW or Cygwin programs
are in your path. Then <tt>cd</tt> to the directory where
you've unpacked the sources and run this command for MinGW:
</p>
<pre class="code">
mingw32-make
</pre>
<p>
Or this command for Cygwin:
</p>
<pre class="code">
make
</pre>
<p>
Then follow the installation instructions below.
</p>
<h3>Installing LuaJIT</h3>
<p>
Copy <tt>luajit.exe</tt> and <tt>lua51.dll</tt> (built in the <tt>src</tt>
directory) to a newly created directory (any location is ok).
Add <tt>lua</tt> and <tt>lua\jit</tt> directories below it and copy
all Lua files from the <tt>lib</tt> directory of the distribution
to the latter directory.
</p>
<p>
There are no hardcoded
absolute path names — all modules are loaded relative to the
directory where <tt>luajit.exe</tt> is installed
(see <tt>src/luaconf.h</tt>).
</p>
<h2>Cross-compiling LuaJIT</h2>
<p>
The build system has limited support for cross-compilation. For details
check the comments in <tt>src/Makefile</tt>. Here are some popular examples:
</p>
<p>
You can cross-compile to a 32 bit binary on a multilib x64 OS by
installing the multilib development packages (e.g. <tt>libc6-dev-i386</tt>
on Debian/Ubuntu) and running:
</p>
<pre class="code">
make CC="gcc -m32"
</pre>
<p>
You can cross-compile for a Windows target on Debian/Ubuntu by
installing the <tt>mingw32</tt> package and running:
</p>
<pre class="code">
make CC="gcc -m32" CROSS=i586-mingw32msvc- TARGET_SYS=Windows
</pre>
<h2>Embedding LuaJIT</h2>
<p>
LuaJIT is API-compatible with Lua 5.1. If you've already embedded Lua
into your application, you probably don't need to do anything to switch
to LuaJIT, except link with a different library. Additional hints:
</p>
<ul>
<li>Make sure you use <tt>luaL_newstate</tt>. Avoid using
<tt>lua_newstate</tt>, since this uses the (slower) default memory
allocator from your system (no support for this on x64).</tt></li>
<li>Make sure you use <tt>luaL_openlibs</tt> and not the old Lua 5.0 style
of calling <tt>luaopen_base</tt> etc. directly.</li>
<li>To change which standard libraries to load, copy <tt>src/lib_init.c</tt>
to your project and modify it accordingly. Make sure the <tt>jit</tt>
library is loaded or the JIT compiler will not be activated.</li>
<li>Here's a
<a href="http://lua-users.org/wiki/SimpleLuaApiExample"><span class="ext">»</span> simple example</a>.</li>
</ul>
<p>
64 bit applications on OSX must be linked with these options
(only the main executable):
</p>
<pre class="code">
-pagezero_size 10000 -image_base 100000000
</pre>
<p>
It's recommended to <tt>rebase</tt> all (self-compiled) shared libraries
which are loaded at runtime on OSX/x64 (e.g. C extension modules for Lua).
See: <tt>man rebase</tt>
</p>
<br class="flush">
</div>
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<hr class="hide">
Copyright © 2005-2010 Mike Pall
<span class="noprint">
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