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Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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Guochun Shi	f4688a8	2002-07-17 23:05:56 +0000	[diff] [blame]	3	<html>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	4	<head>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	5	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	6	<title>Getting Started with LLVM System</title>
				7	<link rel="stylesheet" href="llvm.css" type="text/css">
				8	</head>
				9	<body>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	10
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	11	<h1>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	12	Getting Started with the LLVM System
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	13	</h1>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	14
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	15	<ul>
				16	<li><a href="#overview">Overview</a>
				17	<li><a href="#quickstart">Getting Started Quickly (A Summary)</a>
				18	<li><a href="#requirements">Requirements</a>
Chris Lattner	96768ea	2003-02-14 04:22:13 +0000	[diff] [blame]	19	<ol>
Chris Lattner	269f80c	2007-11-01 04:20:16 +0000	[diff] [blame]	20	<li><a href="#hardware">Hardware</a></li>
				21	<li><a href="#software">Software</a></li>
				22	<li><a href="#brokengcc">Broken versions of GCC and other tools</a></li>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	23	</ol></li>
John Criswell	7a73b80	2003-06-30 21:59:07 +0000	[diff] [blame]	24
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	25	<li><a href="#starting">Getting Started with LLVM</a>
John Criswell	0b45920	2003-07-08 20:35:59 +0000	[diff] [blame]	26	<ol>
Chris Lattner	269f80c	2007-11-01 04:20:16 +0000	[diff] [blame]	27	<li><a href="#terminology">Terminology and Notation</a></li>
				28	<li><a href="#environment">Setting Up Your Environment</a></li>
				29	<li><a href="#unpack">Unpacking the LLVM Archives</a></li>
				30	<li><a href="#checkout">Checkout LLVM from Subversion</a></li>
Anton Korobeynikov	46a98cf	2011-02-01 20:08:28 +0000	[diff] [blame]	31	<li><a href="#git_mirror">LLVM GIT mirror</a></li>
Chris Lattner	269f80c	2007-11-01 04:20:16 +0000	[diff] [blame]	32	<li><a href="#installcf">Install the GCC Front End</a></li>
				33	<li><a href="#config">Local LLVM Configuration</a></li>
				34	<li><a href="#compile">Compiling the LLVM Suite Source Code</a></li>
				35	<li><a href="#cross-compile">Cross-Compiling LLVM</a></li>
				36	<li><a href="#objfiles">The Location of LLVM Object Files</a></li>
				37	<li><a href="#optionalconfig">Optional Configuration Items</a></li>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	38	</ol></li>
John Criswell	0b45920	2003-07-08 20:35:59 +0000	[diff] [blame]	39
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	40	<li><a href="#layout">Program layout</a>
				41	<ol>
Chris Lattner	269f80c	2007-11-01 04:20:16 +0000	[diff] [blame]	42	<li><a href="#examples"><tt>llvm/examples</tt></a></li>
				43	<li><a href="#include"><tt>llvm/include</tt></a></li>
				44	<li><a href="#lib"><tt>llvm/lib</tt></a></li>
				45	<li><a href="#projects"><tt>llvm/projects</tt></a></li>
				46	<li><a href="#runtime"><tt>llvm/runtime</tt></a></li>
				47	<li><a href="#test"><tt>llvm/test</tt></a></li>
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	48	<li><a href="#test-suite"><tt>test-suite</tt></a></li>
Chris Lattner	269f80c	2007-11-01 04:20:16 +0000	[diff] [blame]	49	<li><a href="#tools"><tt>llvm/tools</tt></a></li>
				50	<li><a href="#utils"><tt>llvm/utils</tt></a></li>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	51	</ol></li>
John Criswell	0f6d7c0	2003-10-27 18:18:16 +0000	[diff] [blame]	52
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	53	<li><a href="#tutorial">An Example Using the LLVM Tool Chain</a>
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	54	<ol>
				55	<li><a href="#tutorial4">Example with llvm-gcc4</a></li>
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	56	</ol>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	57	<li><a href="#problems">Common Problems</a>
				58	<li><a href="#links">Links</a>
				59	</ul>
				60
Chris Lattner	7911ce2	2004-05-23 21:07:27 +0000	[diff] [blame]	61	<div class="doc_author">
				62	<p>Written by:
				63	<a href="mailto:criswell@uiuc.edu">John Criswell</a>,
				64	<a href="mailto:sabre@nondot.org">Chris Lattner</a>,
NAKAMURA Takumi	b9a3363	2011-04-09 02:13:37 +0000	[diff] [blame]	65	<a href="http://misha.brukman.net/">Misha Brukman</a>,
Chris Lattner	7911ce2	2004-05-23 21:07:27 +0000	[diff] [blame]	66	<a href="http://www.cs.uiuc.edu/~vadve">Vikram Adve</a>, and
				67	<a href="mailto:gshi1@uiuc.edu">Guochun Shi</a>.
				68	</p>
				69	</div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	70
				71
				72	<!-- *********************************************************************** -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	73	<h2>
				74	<a name="overview">Overview</a>
				75	</h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	76	<!-- *********************************************************************** -->
				77
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	78	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	79
				80	<p>Welcome to LLVM! In order to get started, you first need to know some
				81	basic information.</p>
				82
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	83	<p>First, LLVM comes in three pieces. The first piece is the LLVM
				84	suite. This contains all of the tools, libraries, and header files
				85	needed to use the low level virtual machine. It contains an
				86	assembler, disassembler, bitcode analyzer and bitcode optimizer. It
				87	also contains basic regression tests that can be used to test the LLVM
				88	tools and the GCC front end.</p>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	89
				90	<p>The second piece is the GCC front end. This component provides a version of
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	91	GCC that compiles C and C++ code into LLVM bitcode. Currently, the GCC front
Chris Lattner	82ad9f1	2007-03-06 06:27:34 +0000	[diff] [blame]	92	end uses the GCC parser to convert code to LLVM. Once
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	93	compiled into LLVM bitcode, a program can be manipulated with the LLVM tools
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	94	from the LLVM suite.</p>
				95
John Criswell	3d8ba51	2004-12-08 17:53:54 +0000	[diff] [blame]	96	<p>
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	97	There is a third, optional piece called Test Suite. It is a suite of programs
John Criswell	3d8ba51	2004-12-08 17:53:54 +0000	[diff] [blame]	98	with a testing harness that can be used to further test LLVM's functionality
				99	and performance.
				100	</p>
				101
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	102	</div>
				103
				104	<!-- *********************************************************************** -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	105	<h2>
				106	<a name="quickstart">Getting Started Quickly (A Summary)</a>
				107	</h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	108	<!-- *********************************************************************** -->
				109
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	110	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	111
				112	<p>Here's the short story for getting up and running quickly with LLVM:</p>
				113
				114	<ol>
Reid Spencer	9f54791	2004-11-08 00:29:22 +0000	[diff] [blame]	115	<li>Read the documentation.</li>
				116	<li>Read the documentation.</li>
				117	<li>Remember that you were warned twice about reading the documentation.</li>
Jim Grosbach	18df1d4	2009-12-17 17:18:11 +0000	[diff] [blame]	118	<li>Install the llvm-gcc-4.2 front end if you intend to compile C or C++
NAKAMURA Takumi	4d6deb0	2011-04-09 09:51:57 +0000	[diff] [blame]	119	(see <a href="#installcf">Install the GCC Front End</a> for details):
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	120	<ol>
Reid Spencer	d4694f9	2004-12-22 06:29:07 +0000	[diff] [blame]	121	<li><tt>cd <i>where-you-want-the-C-front-end-to-live</i></tt></li>
Jim Grosbach	18df1d4	2009-12-17 17:18:11 +0000	[diff] [blame]	122	<li><tt>gunzip --stdout llvm-gcc-4.2-<i>version</i>-<i>platform</i>.tar.gz \| tar -xvf -</tt></li>
				123	<li><tt><i>install-binutils-binary-from-MinGW</i></tt> (Windows only)</li>
				124	<li>Note: If the binary extension is "<tt>.bz</tt>" use <tt>bunzip2</tt> instead of <tt>gunzip</tt>.</li>
NAKAMURA Takumi	b9a3363	2011-04-09 02:13:37 +0000	[diff] [blame]	125	<li>Note: On Windows, use <a href="http://www.7-zip.org/">7-Zip</a> or a similar archiving tool.</li>
Jim Grosbach	18df1d4	2009-12-17 17:18:11 +0000	[diff] [blame]	126	<li>Add <tt>llvm-gcc</tt>'s "<tt>bin</tt>" directory to your <tt>PATH</tt> environment variable.</li>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	127	</ol></li>
				128
Misha Brukman	9106eca	2005-02-03 22:25:23 +0000	[diff] [blame]	129	<li>Get the LLVM Source Code
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	130	<ul>
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	131	<li>With the distributed files (or use <a href="#checkout">SVN</a>):
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	132	<ol>
				133	<li><tt>cd <i>where-you-want-llvm-to-live</i></tt>
John Criswell	364cec4	2004-03-12 20:31:37 +0000	[diff] [blame]	134	<li><tt>gunzip --stdout llvm-<i>version</i>.tar.gz \| tar -xvf -</tt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	135	</ol></li>
				136
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	137	</ul></li>
				138
Misha Brukman	9106eca	2005-02-03 22:25:23 +0000	[diff] [blame]	139	<li><b>[Optional]</b> Get the Test Suite Source Code
John Criswell	9e2485c	2004-12-10 15:51:16 +0000	[diff] [blame]	140	<ul>
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	141	<li>With the distributed files (or use <a href="#checkout">SVN</a>):
John Criswell	9e2485c	2004-12-10 15:51:16 +0000	[diff] [blame]	142	<ol>
				143	<li><tt>cd <i>where-you-want-llvm-to-live</i></tt>
				144	<li><tt>cd llvm/projects</tt>
				145	<li><tt>gunzip --stdout llvm-test-<i>version</i>.tar.gz \| tar -xvf -</tt>
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	146	<li><tt>mv llvm-test-<i>version</i> test-suite</tt>
John Criswell	9e2485c	2004-12-10 15:51:16 +0000	[diff] [blame]	147	</ol></li>
				148
John Criswell	9e2485c	2004-12-10 15:51:16 +0000	[diff] [blame]	149	</ul></li>
				150
				151
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	152	<li>Configure the LLVM Build Environment
				153	<ol>
Misha Brukman	9106eca	2005-02-03 22:25:23 +0000	[diff] [blame]	154	<li><tt>cd <i>where-you-want-to-build-llvm</i></tt></li>
				155	<li><tt><i>/path/to/llvm/</i>configure [options]</tt><br>
				156	Some common options:
				157
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	158	<ul>
Reid Spencer	d4694f9	2004-12-22 06:29:07 +0000	[diff] [blame]	159	<li><tt>--prefix=<i>directory</i></tt>
				160	<p>Specify for <i>directory</i> the full pathname of where you
Misha Brukman	9106eca	2005-02-03 22:25:23 +0000	[diff] [blame]	161	want the LLVM tools and libraries to be installed (default
				162	<tt>/usr/local</tt>).</p></li>
Reid Spencer	fef93b7	2004-12-26 05:47:26 +0000	[diff] [blame]	163	<li><tt>--with-llvmgccdir=<i>directory</i></tt>
				164	<p>Optionally, specify for <i>directory</i> the full pathname of the
John Criswell	838bce5	2005-05-09 16:39:27 +0000	[diff] [blame]	165	C/C++ front end installation to use with this LLVM configuration. If
Duncan Sands	dc22376	2009-04-18 12:40:19 +0000	[diff] [blame]	166	not specified, the PATH will be searched. This is only needed if you
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	167	want to run test-suite or do some special kinds of LLVM builds.</p></li>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	168	<li><tt>--enable-spec2000=<i>directory</i></tt>
				169	<p>Enable the SPEC2000 benchmarks for testing. The SPEC2000
				170	benchmarks should be available in
				171	<tt><i>directory</i></tt>.</p></li>
				172	</ul>
				173	</ol></li>
				174
				175	<li>Build the LLVM Suite:
				176	<ol>
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	177	<li><tt>gmake -k \|& tee gnumake.out
				178	# this is csh or tcsh syntax</tt></li>
Chris Lattner	78ce3b8	2007-01-04 07:06:05 +0000	[diff] [blame]	179	<li>If you get an "internal compiler error (ICE)" or test failures, see
				180	<a href="#brokengcc">below</a>.</li>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	181	</ol>
				182
				183	</ol>
				184
Chris Lattner	fcd3725	2004-06-21 22:52:48 +0000	[diff] [blame]	185	<p>Consult the <a href="#starting">Getting Started with LLVM</a> section for
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	186	detailed information on configuring and compiling LLVM. See <a
				187	href="#environment">Setting Up Your Environment</a> for tips that simplify
				188	working with the GCC front end and LLVM tools. Go to <a href="#layout">Program
				189	Layout</a> to learn about the layout of the source code tree.</p>
				190
				191	</div>
				192
				193	<!-- *********************************************************************** -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	194	<h2>
				195	<a name="requirements">Requirements</a>
				196	</h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	197	<!-- *********************************************************************** -->
				198
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	199	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	200
				201	<p>Before you begin to use the LLVM system, review the requirements given below.
				202	This may save you some trouble by knowing ahead of time what hardware and
				203	software you will need.</p>
				204
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	205	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	206	<h3>
				207	<a name="hardware">Hardware</a>
				208	</h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	209
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	210	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	211
				212	<p>LLVM is known to work on the following platforms:</p>
				213
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	214	<table cellpadding="3" summary="Known LLVM platforms">
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	215	<tr>
				216	<th>OS</th>
				217	<th>Arch</th>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	218	<th>Compilers</th>
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	219	</tr>
				220	<tr>
Chris Lattner	d8afc46	2009-07-22 04:21:40 +0000	[diff] [blame]	221	<td>AuroraUX</td>
				222	<td>x86<sup><a href="#pf_1">1</a></sup></td>
				223	<td>GCC</td>
Chris Lattner	3e7b5ca	2009-07-21 22:47:03 +0000	[diff] [blame]	224	</tr>
				225	<tr>
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	226	<td>Linux</td>
Chris Lattner	7db3f52	2005-02-09 21:15:51 +0000	[diff] [blame]	227	<td>x86<sup><a href="#pf_1">1</a></sup></td>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	228	<td>GCC</td>
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	229	</tr>
				230	<tr>
Edward O'Callaghan	37442b7	2009-08-04 05:24:28 +0000	[diff] [blame]	231	<td>Linux</td>
				232	<td>amd64</td>
				233	<td>GCC</td>
				234	</tr>
				235	<tr>
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	236	<td>Solaris</td>
				237	<td>V9 (Ultrasparc)</td>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	238	<td>GCC</td>
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	239	</tr>
				240	<tr>
				241	<td>FreeBSD</td>
Chris Lattner	7db3f52	2005-02-09 21:15:51 +0000	[diff] [blame]	242	<td>x86<sup><a href="#pf_1">1</a></sup></td>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	243	<td>GCC</td>
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	244	</tr>
				245	<tr>
Bill Wendling	f722699	2010-12-15 01:35:55 +0000	[diff] [blame]	246	<td>FreeBSD</td>
				247	<td>amd64</td>
				248	<td>GCC</td>
				249	</tr>
				250	<tr>
Chris Lattner	7db3f52	2005-02-09 21:15:51 +0000	[diff] [blame]	251	<td>MacOS X<sup><a href="#pf_2">2</a></sup></td>
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	252	<td>PowerPC</td>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	253	<td>GCC</td>
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	254	</tr>
				255	<tr>
Scott Michel	050bc81	2008-03-18 23:13:26 +0000	[diff] [blame]	256	<td>MacOS X<sup><a href="#pf_2">2</a>,<a href="#pf_9">9</a></sup></td>
Tanya Lattner	993b980	2006-04-20 04:35:34 +0000	[diff] [blame]	257	<td>x86</td>
				258	<td>GCC</td>
Tanya Lattner	993b980	2006-04-20 04:35:34 +0000	[diff] [blame]	259	</tr>
				260	<tr>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	261	<td>Cygwin/Win32</td>
Anton Korobeynikov	16f1692	2009-12-09 17:26:02 +0000	[diff] [blame]	262	<td>x86<sup><a href="#pf_1">1</a>,<a href="#pf_8">8</a>,
				263	<a href="#pf_11">11</a></sup></td>
Anton Korobeynikov	780679b	2010-02-11 21:51:51 +0000	[diff] [blame]	264	<td>GCC 3.4.X, binutils 2.20</td>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	265	</tr>
Misha Brukman	c155a0a	2004-12-23 07:14:56 +0000	[diff] [blame]	266	<tr>
Chris Lattner	8ccb87f	2005-02-09 20:43:48 +0000	[diff] [blame]	267	<td>MinGW/Win32</td>
Anton Korobeynikov	2bc8ef1	2009-08-06 12:54:58 +0000	[diff] [blame]	268	<td>x86<sup><a href="#pf_1">1</a>,<a href="#pf_6">6</a>,
NAKAMURA Takumi	3c49655	2011-03-28 06:27:06 +0000	[diff] [blame]	269	<a href="#pf_8">8</a>, <a href="#pf_10">10</a>,
				270	<a href="#pf_11">11</a></sup></td>
Anton Korobeynikov	780679b	2010-02-11 21:51:51 +0000	[diff] [blame]	271	<td>GCC 3.4.X, binutils 2.20</td>
Chris Lattner	8ccb87f	2005-02-09 20:43:48 +0000	[diff] [blame]	272	</tr>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	273	</table>
				274
				275	<p>LLVM has partial support for the following platforms:</p>
				276
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	277	<table summary="LLVM partial platform support">
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	278	<tr>
				279	<th>OS</th>
				280	<th>Arch</th>
				281	<th>Compilers</th>
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	282	</tr>
Misha Brukman	0011769	2004-11-15 21:05:08 +0000	[diff] [blame]	283	<tr>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	284	<td>Windows</td>
Chris Lattner	7db3f52	2005-02-09 21:15:51 +0000	[diff] [blame]	285	<td>x86<sup><a href="#pf_1">1</a></sup></td>
Nick Lewycky	28ea4f6	2008-12-08 00:45:02 +0000	[diff] [blame]	286	<td>Visual Studio 2005 SP1 or higher<sup><a href="#pf_4">4</a>,<a href="#pf_5">5</a></sup></td>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	287	<tr>
Chris Lattner	7db3f52	2005-02-09 21:15:51 +0000	[diff] [blame]	288	<td>AIX<sup><a href="#pf_3">3</a>,<a href="#pf_4">4</a></sup></td>
Misha Brukman	0011769	2004-11-15 21:05:08 +0000	[diff] [blame]	289	<td>PowerPC</td>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	290	<td>GCC</td>
				291	</tr>
				292	<tr>
Chris Lattner	7db3f52	2005-02-09 21:15:51 +0000	[diff] [blame]	293	<td>Linux<sup><a href="#pf_3">3</a>,<a href="#pf_5">5</a></sup></td>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	294	<td>PowerPC</td>
				295	<td>GCC</td>
Misha Brukman	0011769	2004-11-15 21:05:08 +0000	[diff] [blame]	296	</tr>
John Criswell	7516255	2005-05-09 16:49:59 +0000	[diff] [blame]	297
				298	<tr>
				299	<td>Linux<sup><a href="#pf_7">7</a></sup></td>
				300	<td>Alpha</td>
				301	<td>GCC</td>
				302	</tr>
				303	<tr>
				304	<td>Linux<sup><a href="#pf_7">7</a></sup></td>
				305	<td>Itanium (IA-64)</td>
				306	<td>GCC</td>
				307	</tr>
Duraid Madina	e8714af	2005-05-10 06:57:53 +0000	[diff] [blame]	308	<tr>
				309	<td>HP-UX<sup><a href="#pf_7">7</a></sup></td>
				310	<td>Itanium (IA-64)</td>
				311	<td>HP aCC</td>
				312	</tr>
NAKAMURA Takumi	282fdd3	2011-03-28 06:27:12 +0000	[diff] [blame]	313	<tr>
				314	<td>Windows x64</td>
				315	<td>x86-64</td>
				316	<td>mingw-w64's GCC-4.5.x<sup><a href="#pf_12">12</a></sup></td>
				317	</tr>
Misha Brukman	14ab537	2004-11-15 05:19:53 +0000	[diff] [blame]	318	</table>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	319
Misha Brukman	a892ead	2005-02-09 21:01:26 +0000	[diff] [blame]	320	<p><b>Notes:</b></p>
				321
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	322	<div class="doc_notes">
				323	<ol>
				324	<li><a name="pf_1">Code generation supported for Pentium processors and
				325	up</a></li>
				326	<li><a name="pf_2">Code generation supported for 32-bit ABI only</a></li>
				327	<li><a name="pf_3">No native code generation</a></li>
Nick Lewycky	28ea4f6	2008-12-08 00:45:02 +0000	[diff] [blame]	328	<li><a name="pf_4">Build is not complete: one or more tools do not link or function</a></li>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	329	<li><a name="pf_5">The GCC-based C/C++ frontend does not build</a></li>
Chris Lattner	01bb8b0	2009-01-02 07:10:51 +0000	[diff] [blame]	330	<li><a name="pf_6">The port is done using the MSYS shell.</a></li>
John Criswell	7516255	2005-05-09 16:49:59 +0000	[diff] [blame]	331	<li><a name="pf_7">Native code generation exists but is not complete.</a></li>
Anton Korobeynikov	780679b	2010-02-11 21:51:51 +0000	[diff] [blame]	332	<li><a name="pf_8">Binutils 2.20 or later is required to build the assembler
				333	generated by LLVM properly.</a></li>
Chris Lattner	22b91d7	2008-11-09 17:19:14 +0000	[diff] [blame]	334	<li><a name="pf_9">XCode 2.5 and gcc 4.0.1</a> (Apple Build 5370) will trip
Scott Michel	050bc81	2008-03-18 23:13:26 +0000	[diff] [blame]	335	internal LLVM assert messages when compiled for Release at optimization
Chris Lattner	22b91d7	2008-11-09 17:19:14 +0000	[diff] [blame]	336	levels greater than 0 (i.e., <i>"-O1"</i> and higher).
				337	Add <i>OPTIMIZE_OPTION="-O0"</i> to the build command line
Scott Michel	050bc81	2008-03-18 23:13:26 +0000	[diff] [blame]	338	if compiling for LLVM Release or bootstrapping the LLVM toolchain.</li>
Anton Korobeynikov	2bc8ef1	2009-08-06 12:54:58 +0000	[diff] [blame]	339	<li><a name="pf_10">For MSYS/MinGW on Windows, be sure to install the MSYS
				340	version of the perl package, and be sure it appears in your path
				341	before any Windows-based versions such as Strawberry Perl and
				342	ActivePerl, as these have Windows-specifics that will cause the
				343	build to fail.</a></li>
NAKAMURA Takumi	3c49655	2011-03-28 06:27:06 +0000	[diff] [blame]	344	<li><a name="pf_11">To use LLVM modules on Win32-based system,
NAKAMURA Takumi	4d6deb0	2011-04-09 09:51:57 +0000	[diff] [blame]	345	you may configure LLVM with <i>"--enable-shared"</i>.</a></li>
NAKAMURA Takumi	282fdd3	2011-03-28 06:27:12 +0000	[diff] [blame]	346	<li><a name="pf_12">To compile SPU backend, you need to add
NAKAMURA Takumi	4d6deb0	2011-04-09 09:51:57 +0000	[diff] [blame]	347	<tt>"LDFLAGS=-Wl,--stack,16777216"</tt> to configure.</a></li>
Misha Brukman	a892ead	2005-02-09 21:01:26 +0000	[diff] [blame]	348	</ol>
Misha Brukman	a892ead	2005-02-09 21:01:26 +0000	[diff] [blame]	349	</div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	350
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	351	<p>Note that you will need about 1-3 GB of space for a full LLVM build in Debug
John Criswell	8bfe6a7	2005-05-18 19:43:33 +0000	[diff] [blame]	352	mode, depending on the system (it is so large because of all the debugging
				353	information and the fact that the libraries are statically linked into multiple
Chris Lattner	0694290	2009-04-25 22:08:52 +0000	[diff] [blame]	354	tools). If you do not need many of the tools and you are space-conscious, you
				355	can pass <tt>ONLY_TOOLS="tools you need"</tt> to make. The Release build
				356	requires considerably less space.</p>
Misha Brukman	69def74	2004-11-19 21:53:22 +0000	[diff] [blame]	357
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	358	<p>The LLVM suite <i>may</i> compile on other platforms, but it is not
				359	guaranteed to do so. If compilation is successful, the LLVM utilities should be
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	360	able to assemble, disassemble, analyze, and optimize LLVM bitcode. Code
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	361	generation should work as well, although the generated native code may not work
				362	on your platform.</p>
				363
				364	<p>The GCC front end is not very portable at the moment. If you want to get it
Misha Brukman	22e9e33	2004-08-09 19:57:01 +0000	[diff] [blame]	365	to work on another platform, you can download a copy of the source and <a
Duncan Sands	8655b15	2008-02-14 17:53:22 +0000	[diff] [blame]	366	href="GCCFEBuildInstrs.html">try to compile it</a> on your platform.</p>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	367
				368	</div>
				369
				370	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	371	<h3>
				372	<a name="software">Software</a>
				373	</h3>
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	374	<div>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	375	<p>Compiling LLVM requires that you have several software packages
				376	installed. The table below lists those required packages. The Package column
				377	is the usual name for the software package that LLVM depends on. The Version
				378	column provides "known to work" versions of the package. The Notes column
				379	describes how LLVM uses the package and provides other details.</p>
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	380	<table summary="Packages required to compile LLVM">
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	381	<tr><th>Package</th><th>Version</th><th>Notes</th></tr>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	382
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	383	<tr>
				384	<td><a href="http://savannah.gnu.org/projects/make">GNU Make</a></td>
				385	<td>3.79, 3.79.1</td>
				386	<td>Makefile/build processor</td>
				387	</tr>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	388
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	389	<tr>
NAKAMURA Takumi	b9a3363	2011-04-09 02:13:37 +0000	[diff] [blame]	390	<td><a href="http://gcc.gnu.org/">GCC</a></td>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	391	<td>3.4.2</td>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	392	<td>C/C++ compiler<sup><a href="#sf1">1</a></sup></td>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	393	</tr>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	394
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	395	<tr>
NAKAMURA Takumi	b9a3363	2011-04-09 02:13:37 +0000	[diff] [blame]	396	<td><a href="http://www.gnu.org/software/texinfo/">TeXinfo</a></td>
Chris Lattner	2286cab	2005-09-06 04:07:15 +0000	[diff] [blame]	397	<td>4.5</td>
				398	<td>For building the CFE</td>
				399	</tr>
				400
				401	<tr>
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	402	<td><a href="http://subversion.tigris.org/project_packages.html">SVN</a></td>
				403	<td>≥1.3</td>
				404	<td>Subversion access to LLVM<sup><a href="#sf2">2</a></sup></td>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	405	</tr>
				406
NAKAMURA Takumi	a8b3e18	2011-04-05 08:24:15 +0000	[diff] [blame]	407	<!-- FIXME:
				408	Do we support dg?
				409	Are DejaGnu and expect obsolete?
				410	Shall we mention Python? -->
				411
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	412	<tr>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	413	<td><a href="http://savannah.gnu.org/projects/dejagnu">DejaGnu</a></td>
				414	<td>1.4.2</td>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	415	<td>Automated test suite<sup><a href="#sf3">3</a></sup></td>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	416	</tr>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	417
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	418	<tr>
				419	<td><a href="http://www.tcl.tk/software/tcltk/">tcl</a></td>
				420	<td>8.3, 8.4</td>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	421	<td>Automated test suite<sup><a href="#sf3">3</a></sup></td>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	422	</tr>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	423
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	424	<tr>
				425	<td><a href="http://expect.nist.gov/">expect</a></td>
				426	<td>5.38.0</td>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	427	<td>Automated test suite<sup><a href="#sf3">3</a></sup></td>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	428	</tr>
				429
				430	<tr>
				431	<td><a href="http://www.perl.com/download.csp">perl</a></td>
Reid Spencer	200d93b	2004-12-09 17:55:37 +0000	[diff] [blame]	432	<td>≥5.6.0</td>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	433	<td>Nightly tester, utilities</td>
				434	</tr>
				435
				436	<tr>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	437	<td><a href="http://savannah.gnu.org/projects/m4">GNU M4</a>
				438	<td>1.4</td>
				439	<td>Macro processor for configuration<sup><a href="#sf4">4</a></sup></td>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	440	</tr>
				441
				442	<tr>
NAKAMURA Takumi	b9a3363	2011-04-09 02:13:37 +0000	[diff] [blame]	443	<td><a href="http://www.gnu.org/software/autoconf/">GNU Autoconf</a></td>
Nick Lewycky	2a0ed09	2009-09-27 04:56:27 +0000	[diff] [blame]	444	<td>2.60</td>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	445	<td>Configuration script builder<sup><a href="#sf4">4</a></sup></td>
				446	</tr>
				447
				448	<tr>
NAKAMURA Takumi	b9a3363	2011-04-09 02:13:37 +0000	[diff] [blame]	449	<td><a href="http://www.gnu.org/software/automake/">GNU Automake</a></td>
Nick Lewycky	2a0ed09	2009-09-27 04:56:27 +0000	[diff] [blame]	450	<td>1.9.6</td>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	451	<td>aclocal macro generator<sup><a href="#sf4">4</a></sup></td>
				452	</tr>
				453
				454	<tr>
				455	<td><a href="http://savannah.gnu.org/projects/libtool">libtool</a></td>
Nick Lewycky	2a0ed09	2009-09-27 04:56:27 +0000	[diff] [blame]	456	<td>1.5.22</td>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	457	<td>Shared library manager<sup><a href="#sf4">4</a></sup></td>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	458	</tr>
				459
				460	</table>
				461
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	462	<p><b>Notes:</b></p>
				463	<div class="doc_notes">
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	464	<ol>
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	465	<li><a name="sf1">Only the C and C++ languages are needed so there's no
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	466	need to build the other languages for LLVM's purposes.</a> See
				467	<a href="#brokengcc">below</a> for specific version info.</li>
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	468	<li><a name="sf2">You only need Subversion if you intend to build from the
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	469	latest LLVM sources. If you're working from a release distribution, you
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	470	don't need Subversion.</a></li>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	471	<li><a name="sf3">Only needed if you want to run the automated test
				472	suite in the <tt>llvm/test</tt> directory.</a></li>
				473	<li><a name="sf4">If you want to make changes to the configure scripts,
Tobias Grosser	0560ce4	2010-05-19 07:00:17 +0000	[diff] [blame]	474	you will need GNU autoconf (2.60), and consequently, GNU M4 (version 1.4
				475	or higher). You will also need automake (1.9.6). We only use aclocal
Reid Spencer	200d93b	2004-12-09 17:55:37 +0000	[diff] [blame]	476	from that package.</a></li>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	477	</ol>
Misha Brukman	6d8e153	2005-02-09 22:38:47 +0000	[diff] [blame]	478	</div>
				479
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	480	<p>Additionally, your compilation host is expected to have the usual
				481	plethora of Unix utilities. Specifically:</p>
				482	<ul>
				483	<li><b>ar</b> - archive library builder</li>
				484	<li><b>bzip2*</b> - bzip2 command for distribution generation</li>
				485	<li><b>bunzip2*</b> - bunzip2 command for distribution checking</li>
				486	<li><b>chmod</b> - change permissions on a file</li>
John Criswell	c4ef3f2	2004-12-08 16:55:27 +0000	[diff] [blame]	487	<li><b>cat</b> - output concatenation utility</li>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	488	<li><b>cp</b> - copy files</li>
				489	<li><b>date</b> - print the current date/time </li>
				490	<li><b>echo</b> - print to standard output</li>
				491	<li><b>egrep</b> - extended regular expression search utility</li>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	492	<li><b>find</b> - find files/dirs in a file system</li>
				493	<li><b>grep</b> - regular expression search utility</li>
				494	<li><b>gzip*</b> - gzip command for distribution generation</li>
				495	<li><b>gunzip*</b> - gunzip command for distribution checking</li>
				496	<li><b>install</b> - install directories/files </li>
				497	<li><b>mkdir</b> - create a directory</li>
				498	<li><b>mv</b> - move (rename) files</li>
				499	<li><b>ranlib</b> - symbol table builder for archive libraries</li>
Misha Brukman	616bd05	2004-11-20 01:27:40 +0000	[diff] [blame]	500	<li><b>rm</b> - remove (delete) files and directories</li>
Reid Spencer	748d82e	2004-11-15 21:15:12 +0000	[diff] [blame]	501	<li><b>sed</b> - stream editor for transforming output</li>
				502	<li><b>sh</b> - Bourne shell for make build scripts</li>
				503	<li><b>tar</b> - tape archive for distribution generation</li>
				504	<li><b>test</b> - test things in file system</li>
				505	<li><b>unzip*</b> - unzip command for distribution checking</li>
				506	<li><b>zip*</b> - zip command for distribution generation</li>
				507	</ul>
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	508	</div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	509
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	510	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	511	<h3>
Chris Lattner	defb9fb	2007-06-19 05:52:36 +0000	[diff] [blame]	512	<a name="brokengcc">Broken versions of GCC and other tools</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	513	</h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	514
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	515	<div>
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	516
				517	<p>LLVM is very demanding of the host C++ compiler, and as such tends to expose
				518	bugs in the compiler. In particular, several versions of GCC crash when trying
Chris Lattner	6557f18	2006-06-16 17:20:33 +0000	[diff] [blame]	519	to compile LLVM. We routinely use GCC 3.3.3, 3.4.0, and Apple 4.0.1
Chris Lattner	36117ac	2007-05-10 06:42:21 +0000	[diff] [blame]	520	successfully with them (however, see important notes below). Other versions
				521	of GCC will probably work as well. GCC versions listed
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	522	here are known to not work. If you are using one of these versions, please try
				523	to upgrade your GCC to something more recent. If you run into a problem with a
				524	version of GCC not listed here, please <a href="mailto:llvmdev@cs.uiuc.edu">let
				525	us know</a>. Please use the "<tt>gcc -v</tt>" command to find out which version
				526	of GCC you are using.
				527	</p>
				528
				529	<p><b>GCC versions prior to 3.0</b>: GCC 2.96.x and before had several
				530	problems in the STL that effectively prevent it from compiling LLVM.
				531	</p>
				532
Chris Lattner	82f0a09	2008-02-13 17:50:24 +0000	[diff] [blame]	533	<p><b>GCC 3.2.2 and 3.2.3</b>: These versions of GCC fails to compile LLVM with
				534	a bogus template error. This was fixed in later GCCs.</p>
John Criswell	294ba02	2004-11-23 22:06:24 +0000	[diff] [blame]	535
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	536	<p><b>GCC 3.3.2</b>: This version of GCC suffered from a <a
				537	href="http://gcc.gnu.org/PR13392">serious bug</a> which causes it to crash in
				538	the "<tt>convert_from_eh_region_ranges_1</tt>" GCC function.</p>
Chris Lattner	25e7b16	2005-02-12 20:11:13 +0000	[diff] [blame]	539
Chris Lattner	8e64f15	2005-02-13 22:20:49 +0000	[diff] [blame]	540	<p><b>Cygwin GCC 3.3.3</b>: The version of GCC 3.3.3 commonly shipped with
Duncan Sands	8655b15	2008-02-14 17:53:22 +0000	[diff] [blame]	541	Cygwin does not work. Please <a href="GCCFEBuildInstrs.html#cygwin">upgrade
Chris Lattner	8e64f15	2005-02-13 22:20:49 +0000	[diff] [blame]	542	to a newer version</a> if possible.</p>
				543	<p><b>SuSE GCC 3.3.3</b>: The version of GCC 3.3.3 shipped with SuSE 9.1 (and
				544	possibly others) does not compile LLVM correctly (it appears that exception
				545	handling is broken in some cases). Please download the FSF 3.3.3 or upgrade
				546	to a newer version of GCC.</p>
Bill Wendling	18bf0d0	2007-07-16 08:52:56 +0000	[diff] [blame]	547	<p><b>GCC 3.4.0 on linux/x86 (32-bit)</b>: GCC miscompiles portions of the
Chris Lattner	36117ac	2007-05-10 06:42:21 +0000	[diff] [blame]	548	code generator, causing an infinite loop in the llvm-gcc build when built
				549	with optimizations enabled (i.e. a release build).</p>
Bill Wendling	18bf0d0	2007-07-16 08:52:56 +0000	[diff] [blame]	550	<p><b>GCC 3.4.2 on linux/x86 (32-bit)</b>: GCC miscompiles portions of the
Chris Lattner	36117ac	2007-05-10 06:42:21 +0000	[diff] [blame]	551	code generator at -O3, as with 3.4.0. However gcc 3.4.2 (unlike 3.4.0)
				552	correctly compiles LLVM at -O2. A work around is to build release LLVM
				553	builds with "make ENABLE_OPTIMIZED=1 OPTIMIZE_OPTION=-O2 ..."</p>
Bill Wendling	18bf0d0	2007-07-16 08:52:56 +0000	[diff] [blame]	554	<p><b>GCC 3.4.x on X86-64/amd64</b>: GCC <a href="http://llvm.org/PR1056">
Chris Lattner	77c2af6	2007-04-01 20:14:46 +0000	[diff] [blame]	555	miscompiles portions of LLVM</a>.</p>
Chris Lattner	269f80c	2007-11-01 04:20:16 +0000	[diff] [blame]	556	<p><b>GCC 3.4.4 (CodeSourcery ARM 2005q3-2)</b>: this compiler miscompiles LLVM
				557	when building with optimizations enabled. It appears to work with
				558	"<tt>make ENABLE_OPTIMIZED=1 OPTIMIZE_OPTION=-O1</tt>" or build a debug
				559	build.</p>
Chris Lattner	f2b5e6e	2005-05-15 22:26:45 +0000	[diff] [blame]	560	<p><b>IA-64 GCC 4.0.0</b>: The IA-64 version of GCC 4.0.0 is known to
				561	miscompile LLVM.</p>
Chris Lattner	dd19791	2006-06-16 19:53:39 +0000	[diff] [blame]	562	<p><b>Apple Xcode 2.3</b>: GCC crashes when compiling LLVM at -O3 (which is the
				563	default with ENABLE_OPTIMIZED=1. To work around this, build with
				564	"ENABLE_OPTIMIZED=1 OPTIMIZE_OPTION=-O2".</p>
Chris Lattner	c40eb5e	2006-09-07 17:34:27 +0000	[diff] [blame]	565	<p><b>GCC 4.1.1</b>: GCC fails to build LLVM with template concept check errors
				566	compiling some files. At the time of this writing, GCC mainline (4.2)
				567	did not share the problem.</p>
Chris Lattner	78ce3b8	2007-01-04 07:06:05 +0000	[diff] [blame]	568	<p><b>GCC 4.1.1 on X86-64/amd64</b>: GCC <a href="http://llvm.org/PR1063">
				569	miscompiles portions of LLVM</a> when compiling llvm itself into 64-bit
				570	code. LLVM will appear to mostly work but will be buggy, e.g. failing
				571	portions of its testsuite.</p>
Reid Spencer	72f92f0	2007-04-11 21:28:31 +0000	[diff] [blame]	572	<p><b>GCC 4.1.2 on OpenSUSE</b>: Seg faults during libstdc++ build and on x86_64
				573	platforms compiling md5.c gets a mangled constant.</p>
Daniel Dunbar	b7dfaf9	2008-10-11 18:40:33 +0000	[diff] [blame]	574	<p><b>GCC 4.1.2 (20061115 (prerelease) (Debian 4.1.1-21)) on Debian</b>: Appears
				575	to miscompile parts of LLVM 2.4. One symptom is ValueSymbolTable complaining
				576	about symbols remaining in the table on destruction.</p>
Nuno Lopes	f82242d	2008-12-10 16:11:10 +0000	[diff] [blame]	577	<p><b>GCC 4.1.2 20071124 (Red Hat 4.1.2-42)</b>: Suffers from the same symptoms
Nuno Lopes	58dc0b5	2008-12-10 16:01:22 +0000	[diff] [blame]	578	as the previous one. It appears to work with ENABLE_OPTIMIZED=0 (the default).</p>
Mike Stump	fe095f3	2009-05-04 18:40:41 +0000	[diff] [blame]	579	<p><b>Cygwin GCC 4.3.2 20080827 (beta) 2</b>:
				580	Users <a href="http://llvm.org/PR4145">reported</a> various problems related
				581	with link errors when using this GCC version.</p>
Chris Lattner	478e71d	2009-09-10 16:25:02 +0000	[diff] [blame]	582	<p><b>Debian GCC 4.3.2 on X86</b>: Crashes building some files in LLVM 2.6.</p>
Nick Lewycky	3bf2d03	2009-07-17 06:32:10 +0000	[diff] [blame]	583	<p><b>GCC 4.3.3 (Debian 4.3.3-10) on ARM</b>: Miscompiles parts of LLVM 2.6
				584	when optimizations are turned on. The symptom is an infinite loop in
Chris Lattner	478e71d	2009-09-10 16:25:02 +0000	[diff] [blame]	585	FoldingSetImpl::RemoveNode while running the code generator.</p>
Nick Lewycky	256f960	2010-10-07 22:30:47 +0000	[diff] [blame]	586	<p><b>GCC 4.3.5 and GCC 4.4.5 on ARM</b>: These can miscompile <tt>value >>
				587	1</tt> even at -O0. A test failure in <tt>test/Assembler/alignstack.ll</tt> is
				588	one symptom of the problem.
Reid Spencer	7a11908	2006-11-04 00:33:42 +0000	[diff] [blame]	589	<p><b>GNU ld 2.16.X</b>. Some 2.16.X versions of the ld linker will produce very
				590	long warning messages complaining that some ".gnu.linkonce.t.*" symbol was
				591	defined in a discarded section. You can safely ignore these messages as they are
				592	erroneous and the linkage is correct. These messages disappear using ld
				593	2.17.</p>
Chris Lattner	defb9fb	2007-06-19 05:52:36 +0000	[diff] [blame]	594
				595	<p><b>GNU binutils 2.17</b>: Binutils 2.17 contains <a
				596	href="http://sourceware.org/bugzilla/show_bug.cgi?id=3111">a bug</a> which
				597	causes huge link times (minutes instead of seconds) when building LLVM. We
				598	recommend upgrading to a newer version (2.17.50.0.4 or later).</p>
				599
Nick Lewycky	bb2b521	2009-03-03 05:41:16 +0000	[diff] [blame]	600	<p><b>GNU Binutils 2.19.1 Gold</b>: This version of Gold contained
Nick Lewycky	d9f66e6	2009-02-25 06:29:47 +0000	[diff] [blame]	601	<a href="http://sourceware.org/bugzilla/show_bug.cgi?id=9836">a bug</a>
				602	which causes intermittent failures when building LLVM with position independent
Nick Lewycky	bb2b521	2009-03-03 05:41:16 +0000	[diff] [blame]	603	code. The symptom is an error about cyclic dependencies. We recommend
				604	upgrading to a newer version of Gold.</p>
Nick Lewycky	d9f66e6	2009-02-25 06:29:47 +0000	[diff] [blame]	605
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	606	</div>
				607
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	608	</div>
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	609
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	610	<!-- *********************************************************************** -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	611	<h2>
				612	<a name="starting">Getting Started with LLVM</a>
				613	</h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	614	<!-- *********************************************************************** -->
				615
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	616	<div>
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	617
				618	<p>The remainder of this guide is meant to get you up and running with
				619	LLVM and to give you some basic information about the LLVM environment.</p>
				620
				621	<p>The later sections of this guide describe the <a
				622	href="#layout">general layout</a> of the the LLVM source tree, a <a
				623	href="#tutorial">simple example</a> using the LLVM tool chain, and <a
				624	href="#links">links</a> to find more information about LLVM or to get
				625	help via e-mail.</p>
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	626
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	627	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	628	<h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	629	<a name="terminology">Terminology and Notation</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	630	</h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	631
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	632	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	633
				634	<p>Throughout this manual, the following names are used to denote paths
				635	specific to the local system and working environment. <i>These are not
				636	environment variables you need to set but just strings used in the rest
				637	of this document below</i>. In any of the examples below, simply replace
				638	each of these names with the appropriate pathname on your local system.
				639	All these paths are absolute:</p>
				640
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	641	<dl>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	642	<dt>SRC_ROOT
				643	<dd>
				644	This is the top level directory of the LLVM source tree.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	645	<br><br>
John Criswell	0f6d7c0	2003-10-27 18:18:16 +0000	[diff] [blame]	646
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	647	<dt>OBJ_ROOT
				648	<dd>
				649	This is the top level directory of the LLVM object tree (i.e. the
				650	tree where object files and compiled programs will be placed. It
				651	can be the same as SRC_ROOT).
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	652	<br><br>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	653
				654	<dt>LLVMGCCDIR
				655	<dd>
Reid Spencer	fef93b7	2004-12-26 05:47:26 +0000	[diff] [blame]	656	This is where the LLVM GCC Front End is installed.
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	657	<p>
				658	For the pre-built GCC front end binaries, the LLVMGCCDIR is
Tanya Lattner	f7b6be0	2006-11-20 06:04:46 +0000	[diff] [blame]	659	<tt>llvm-gcc/<i>platform</i>/llvm-gcc</tt>.
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	660	</dl>
				661
				662	</div>
				663
				664	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	665	<h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	666	<a name="environment">Setting Up Your Environment</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	667	</h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	668
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	669	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	670
				671	<p>
Misha Brukman	8f0cad1	2005-02-03 18:28:08 +0000	[diff] [blame]	672	In order to compile and use LLVM, you may need to set some environment
				673	variables.
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	674
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	675	<dl>
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	676	<dt><tt>LLVM_LIB_SEARCH_PATH</tt>=<tt>/path/to/your/bitcode/libs</tt></dt>
Misha Brukman	8f0cad1	2005-02-03 18:28:08 +0000	[diff] [blame]	677	<dd>[Optional] This environment variable helps LLVM linking tools find the
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	678	locations of your bitcode libraries. It is provided only as a
Misha Brukman	8f0cad1	2005-02-03 18:28:08 +0000	[diff] [blame]	679	convenience since you can specify the paths using the -L options of the
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	680	tools and the C/C++ front-end will automatically use the bitcode files
John Criswell	8bfe6a7	2005-05-18 19:43:33 +0000	[diff] [blame]	681	installed in its
Misha Brukman	8f0cad1	2005-02-03 18:28:08 +0000	[diff] [blame]	682	<tt>lib</tt> directory.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	683	</dl>
				684
				685	</div>
				686
				687	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	688	<h3>
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	689	<a name="unpack">Unpacking the LLVM Archives</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	690	</h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	691
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	692	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	693
				694	<p>
				695	If you have the LLVM distribution, you will need to unpack it before you
John Criswell	d000e1d	2003-12-18 16:43:17 +0000	[diff] [blame]	696	can begin to compile it. LLVM is distributed as a set of two files: the LLVM
John Criswell	9e2485c	2004-12-10 15:51:16 +0000	[diff] [blame]	697	suite and the LLVM GCC front end compiled for your platform. There is an
				698	additional test suite that is optional. Each file is a TAR archive that is
				699	compressed with the gzip program.
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	700	</p>
				701
Misha Brukman	3ce1103	2005-02-02 18:01:57 +0000	[diff] [blame]	702	<p>The files are as follows, with <em>x.y</em> marking the version number:
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	703	<dl>
Misha Brukman	3ce1103	2005-02-02 18:01:57 +0000	[diff] [blame]	704	<dt><tt>llvm-x.y.tar.gz</tt></dt>
Misha Brukman	f00ddb0	2008-12-11 18:23:24 +0000	[diff] [blame]	705	<dd>Source release for the LLVM libraries and tools.<br></dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	706
Misha Brukman	3ce1103	2005-02-02 18:01:57 +0000	[diff] [blame]	707	<dt><tt>llvm-test-x.y.tar.gz</tt></dt>
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	708	<dd>Source release for the LLVM test-suite.</dd>
Misha Brukman	8f9e6d6	2004-11-23 19:26:24 +0000	[diff] [blame]	709
Misha Brukman	ccd0295	2008-12-29 19:38:58 +0000	[diff] [blame]	710	<dt><tt>llvm-gcc-4.2-x.y.source.tar.gz</tt></dt>
				711	<dd>Source release of the llvm-gcc-4.2 front end. See README.LLVM in the root
Misha Brukman	f00ddb0	2008-12-11 18:23:24 +0000	[diff] [blame]	712	directory for build instructions.<br></dd>
Chris Lattner	1ef81af	2006-04-20 05:08:23 +0000	[diff] [blame]	713
Misha Brukman	ccd0295	2008-12-29 19:38:58 +0000	[diff] [blame]	714	<dt><tt>llvm-gcc-4.2-x.y-platform.tar.gz</tt></dt>
				715	<dd>Binary release of the llvm-gcc-4.2 front end for a specific platform.<br></dd>
Chris Lattner	1ef81af	2006-04-20 05:08:23 +0000	[diff] [blame]	716
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	717	</dl>
				718
				719	</div>
				720
				721	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	722	<h3>
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	723	<a name="checkout">Checkout LLVM from Subversion</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	724	</h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	725
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	726	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	727
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	728	<p>If you have access to our Subversion repository, you can get a fresh copy of
Chris Lattner	efdb3bc	2009-04-25 22:24:49 +0000	[diff] [blame]	729	the entire source code. All you need to do is check it out from Subversion as
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	730	follows:</p>
				731
				732	<ul>
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	733	<li><tt>cd <i>where-you-want-llvm-to-live</i></tt></li>
Anton Korobeynikov	98044e4	2007-06-29 20:56:49 +0000	[diff] [blame]	734	<li>Read-Only: <tt>svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm</tt></li>
				735	<li>Read-Write:<tt>svn co https://user@llvm.org/svn/llvm-project/llvm/trunk
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	736	llvm</tt></li>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	737	</ul>
				738
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	739
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	740	<p>This will create an '<tt>llvm</tt>' directory in the current
				741	directory and fully populate it with the LLVM source code, Makefiles,
				742	test directories, and local copies of documentation files.</p>
				743
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	744	<p>If you want to get a specific release (as opposed to the most recent
Anton Korobeynikov	d933fa9	2007-06-29 23:13:42 +0000	[diff] [blame]	745	revision), you can checkout it from the '<tt>tags</tt>' directory (instead of
Anton Korobeynikov	d724dc8	2007-06-30 00:00:57 +0000	[diff] [blame]	746	'<tt>trunk</tt>'). The following releases are located in the following
Misha Brukman	9474d01	2008-12-17 16:27:23 +0000	[diff] [blame]	747	subdirectories of the '<tt>tags</tt>' directory:</p>
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	748
John Criswell	d000e1d	2003-12-18 16:43:17 +0000	[diff] [blame]	749	<ul>
Bill Wendling	c3b94fb	2011-04-04 23:42:51 +0000	[diff] [blame]	750	<li>Release 2.9: <b>RELEASE_29/final</b></li>
Bill Wendling	c44c245	2010-10-06 23:50:30 +0000	[diff] [blame]	751	<li>Release 2.8: <b>RELEASE_28</b></li>
Tanya Lattner	994526c	2010-10-06 05:36:01 +0000	[diff] [blame]	752	<li>Release 2.7: <b>RELEASE_27</b></li>
Tanya Lattner	f08803b	2009-10-23 06:20:06 +0000	[diff] [blame]	753	<li>Release 2.6: <b>RELEASE_26</b></li>
Chris Lattner	efdb3bc	2009-04-25 22:24:49 +0000	[diff] [blame]	754	<li>Release 2.5: <b>RELEASE_25</b></li>
Misha Brukman	9474d01	2008-12-17 16:27:23 +0000	[diff] [blame]	755	<li>Release 2.4: <b>RELEASE_24</b></li>
Tanya Lattner	b37ef51	2008-06-09 06:02:09 +0000	[diff] [blame]	756	<li>Release 2.3: <b>RELEASE_23</b></li>
Tanya Lattner	dd50f0f	2008-02-12 02:42:55 +0000	[diff] [blame]	757	<li>Release 2.2: <b>RELEASE_22</b></li>
Tanya Lattner	7638565	2007-09-28 22:50:54 +0000	[diff] [blame]	758	<li>Release 2.1: <b>RELEASE_21</b></li>
Tanya Lattner	1dcadec	2007-05-22 06:06:22 +0000	[diff] [blame]	759	<li>Release 2.0: <b>RELEASE_20</b></li>
Tanya Lattner	134693a	2006-11-20 06:07:10 +0000	[diff] [blame]	760	<li>Release 1.9: <b>RELEASE_19</b></li>
Tanya Lattner	f7b6be0	2006-11-20 06:04:46 +0000	[diff] [blame]	761	<li>Release 1.8: <b>RELEASE_18</b></li>
Tanya Lattner	993b980	2006-04-20 04:35:34 +0000	[diff] [blame]	762	<li>Release 1.7: <b>RELEASE_17</b></li>
John Criswell	c0c186d	2005-11-08 21:11:33 +0000	[diff] [blame]	763	<li>Release 1.6: <b>RELEASE_16</b></li>
John Criswell	7516255	2005-05-09 16:49:59 +0000	[diff] [blame]	764	<li>Release 1.5: <b>RELEASE_15</b></li>
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	765	<li>Release 1.4: <b>RELEASE_14</b></li>
John Criswell	18b7464	2004-08-16 14:51:33 +0000	[diff] [blame]	766	<li>Release 1.3: <b>RELEASE_13</b></li>
Misha Brukman	b9be2bf	2004-05-12 19:25:59 +0000	[diff] [blame]	767	<li>Release 1.2: <b>RELEASE_12</b></li>
				768	<li>Release 1.1: <b>RELEASE_11</b></li>
				769	<li>Release 1.0: <b>RELEASE_1</b></li>
John Criswell	d000e1d	2003-12-18 16:43:17 +0000	[diff] [blame]	770	</ul>
John Criswell	d000e1d	2003-12-18 16:43:17 +0000	[diff] [blame]	771
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	772	<p>If you would like to get the LLVM test suite (a separate package as of 1.4),
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	773	you get it from the Subversion repository:</p>
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	774
				775	<div class="doc_code">
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	776	<pre>
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	777	% cd llvm/projects
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	778	% svn co http://llvm.org/svn/llvm-project/test-suite/trunk test-suite
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	779	</pre>
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	780	</div>
				781
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	782	<p>By placing it in the <tt>llvm/projects</tt>, it will be automatically
John Criswell	c4ef3f2	2004-12-08 16:55:27 +0000	[diff] [blame]	783	configured by the LLVM configure script as well as automatically updated when
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	784	you run <tt>svn update</tt>.</p>
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	785
Chris Lattner	82ad9f1	2007-03-06 06:27:34 +0000	[diff] [blame]	786	<p>If you would like to get the GCC front end source code, you can also get it
Duncan Sands	8655b15	2008-02-14 17:53:22 +0000	[diff] [blame]	787	and build it yourself. Please follow <a href="GCCFEBuildInstrs.html">these
Chris Lattner	82ad9f1	2007-03-06 06:27:34 +0000	[diff] [blame]	788	instructions</a> to successfully get and build the LLVM GCC front-end.</p>
Chris Lattner	604fdc1	2004-06-28 17:14:01 +0000	[diff] [blame]	789
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	790	</div>
				791
				792	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	793	<h3>
Anton Korobeynikov	46a98cf	2011-02-01 20:08:28 +0000	[diff] [blame]	794	<a name="git_mirror">GIT mirror</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	795	</h3>
Anton Korobeynikov	46a98cf	2011-02-01 20:08:28 +0000	[diff] [blame]	796
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	797	<div>
Anton Korobeynikov	46a98cf	2011-02-01 20:08:28 +0000	[diff] [blame]	798
				799	<p>GIT mirrors are available for a number of LLVM subprojects. These mirrors
				800	sync automatically with each Subversion commit and contain all necessary
				801	git-svn marks (so, you can recreate git-svn metadata locally). Note that right
				802	now mirrors reflect only <tt>trunk</tt> for each project. You can do the
NAKAMURA Takumi	4d6deb0	2011-04-09 09:51:57 +0000	[diff] [blame]	803	read-only GIT clone of LLVM via:</p>
				804
Anton Korobeynikov	46a98cf	2011-02-01 20:08:28 +0000	[diff] [blame]	805	<pre>
Jeffrey Yasskin	343c3a5	2011-07-19 00:20:54 +0000	[diff] [blame^]	806	git clone http://llvm.org/git/llvm.git
				807	</pre>
				808
				809	<p>If you want to check out clang too, run:</p>
				810
				811	<pre>
				812	git clone http://llvm.org/git/llvm.git
				813	cd llvm/tools
				814	git clone http://llvm.org/git/clang.git
				815	</pre>
				816
				817	<p>To set up clone from which you can submit code using
				818	<tt>git-svn</tt>, run:</p>
				819
				820	<pre>
				821	git clone http://llvm.org/git/llvm
				822	cd llvm
				823	git svn init https://llvm.org/svn/llvm-project/llvm/trunk --username=<username>
				824	git config svn-remote.svn.fetch :refs/remotes/origin/master
				825	git svn rebase -l # -l avoids fetching ahead of the git mirror.
				826
				827	# If you have clang too:
				828	cd tools
				829	git clone http://llvm.org/git/clang.git clang
				830	cd clang
				831	git svn init https://llvm.org/svn/llvm-project/cfe/trunk --username=<username>
				832	git config svn-remote.svn.fetch :refs/remotes/origin/master
				833	git svn rebase -l
				834	</pre>
				835
				836	<p>To update this clone without generating git-svn tags that conflict
				837	with the upstream git repo, run:</p>
				838
				839	<pre>
				840	git fetch && (cd tools/clang && git fetch) # Get matching revisions of both trees.
				841	git checkout master
				842	git svn rebase -l
				843	(cd tools/clang &&
				844	git checkout master &&
				845	git svn rebase -l)
				846	</pre>
				847
				848	<p>This leaves your working directories on their master branches, so
				849	you'll need to <tt>checkout</tt> each working branch individually and
				850	<tt>rebase</tt> it on top of its parent branch. (Note: This script is
				851	intended for relative newbies to git. If you have more experience,
				852	you can likely improve on it.)</p>
				853
				854	<p>The git-svn metadata can get out of sync after you mess around with
				855	branches and <code>dcommit</code>. When that happens, <code>git svn
				856	dcommit</code> stops working, complaining about files with uncommitted
				857	changes. The fix is to rebuild the metadata:</p>
				858
				859	<pre>
				860	rm -rf .git/svn
				861	git svn rebase -l
Anton Korobeynikov	46a98cf	2011-02-01 20:08:28 +0000	[diff] [blame]	862	</pre>
Anton Korobeynikov	46a98cf	2011-02-01 20:08:28 +0000	[diff] [blame]	863
				864	</div>
				865
				866	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	867	<h3>
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	868	<a name="installcf">Install the GCC Front End</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	869	</h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	870
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	871	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	872
Jim Grosbach	18df1d4	2009-12-17 17:18:11 +0000	[diff] [blame]	873	<p>Before configuring and compiling the LLVM suite (or if you want to use just the LLVM
				874	GCC front end) you can optionally extract the front end from the binary distribution.
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	875	It is used for running the LLVM test-suite and for compiling C/C++ programs. Note that
Jim Grosbach	18df1d4	2009-12-17 17:18:11 +0000	[diff] [blame]	876	you can optionally <a href="GCCFEBuildInstrs.html">build llvm-gcc yourself</a> after building the
Chris Lattner	bcb38cf	2007-02-14 07:33:00 +0000	[diff] [blame]	877	main LLVM repository.</p>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	878
Jim Grosbach	18df1d4	2009-12-17 17:18:11 +0000	[diff] [blame]	879	<p>To install the GCC front end, do the following (on Windows, use an archival tool
NAKAMURA Takumi	b9a3363	2011-04-09 02:13:37 +0000	[diff] [blame]	880	like <a href="http://www.7-zip.org/">7-zip</a> that understands gzipped tars):</p>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	881
				882	<ol>
				883	<li><tt>cd <i>where-you-want-the-front-end-to-live</i></tt></li>
Misha Brukman	ccd0295	2008-12-29 19:38:58 +0000	[diff] [blame]	884	<li><tt>gunzip --stdout llvm-gcc-4.2-<i>version</i>-<i>platform</i>.tar.gz \| tar -xvf
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	885	-</tt></li>
				886	</ol>
				887
Jim Grosbach	18df1d4	2009-12-17 17:18:11 +0000	[diff] [blame]	888	<p>Once the binary is uncompressed, if you're using a *nix-based system, add a symlink for
				889	<tt>llvm-gcc</tt> and <tt>llvm-g++</tt> to some directory in your path. If you're using a
				890	Windows-based system, add the <tt>bin</tt> subdirectory of your front end installation directory
				891	to your <tt>PATH</tt> environment variable. For example, if you uncompressed the binary to
				892	<tt>c:\llvm-gcc</tt>, add <tt>c:\llvm-gcc\bin</tt> to your <tt>PATH</tt>.</p>
				893
				894	<p>If you now want to build LLVM from source, when you configure LLVM, it will
				895	automatically detect <tt>llvm-gcc</tt>'s presence (if it is in your path) enabling its
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	896	use in test-suite. Note that you can always build or install <tt>llvm-gcc</tt> at any
Jim Grosbach	18df1d4	2009-12-17 17:18:11 +0000	[diff] [blame]	897	point after building the main LLVM repository: just reconfigure llvm and
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	898	test-suite will pick it up.
Chris Lattner	bcb38cf	2007-02-14 07:33:00 +0000	[diff] [blame]	899	</p>
				900
Jim Grosbach	18df1d4	2009-12-17 17:18:11 +0000	[diff] [blame]	901	<p>As a convenience for Windows users, the front end binaries for MinGW/x86 include
				902	versions of the required w32api and mingw-runtime binaries. The last remaining step for
				903	Windows users is to simply uncompress the binary binutils package from
				904	<a href="http://mingw.org/">MinGW</a> into your front end installation directory. While the
				905	front end installation steps are not quite the same as a typical manual MinGW installation,
				906	they should be similar enough to those who have previously installed MinGW on Windows systems.</p>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	907
Jim Grosbach	18df1d4	2009-12-17 17:18:11 +0000	[diff] [blame]	908	<p>To install binutils on Windows:</p>
				909
				910	<ol>
				911	<li><tt><i>download GNU Binutils from <a href="http://sourceforge.net/projects/mingw/files/">MinGW Downloads</a></i></tt></li>
				912	<li><tt>cd <i>where-you-uncompressed-the-front-end</i></tt></li>
				913	<li><tt><i>uncompress archived binutils directories (not the tar file) into the current directory</i></tt></li>
				914	</ol>
				915
				916	<p>The binary versions of the LLVM GCC front end may not suit all of your needs. For
				917	example, the binary distribution may include an old version of a system header
				918	file, not "fix" a header file that needs to be fixed for GCC, or it may be linked with
				919	libraries not available on your system. In cases like these, you may want to try
				920	<a href="GCCFEBuildInstrs.html">building the GCC front end from source</a>. Thankfully,
				921	this is much easier now than it was in the past.</p>
				922
				923	<p>We also do not currently support updating of the GCC front end by manually overlaying
				924	newer versions of the w32api and mingw-runtime binary packages that may become available
				925	from MinGW. At this time, it's best to think of the MinGW LLVM GCC front end binary as
				926	a self-contained convenience package that requires Windows users to simply download and
				927	uncompress the GNU Binutils binary package from the MinGW project.</p>
				928
				929	<p>Regardless of your platform, if you discover that installing the LLVM GCC front end
				930	binaries is not as easy as previously described, or you would like to suggest improvements,
				931	please let us know how you would like to see things improved by dropping us a note on our
				932	<a href="http://llvm.org/docs/#maillist">mailing list</a>.</p>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	933
				934	</div>
				935
				936	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	937	<h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	938	<a name="config">Local LLVM Configuration</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	939	</h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	940
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	941	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	942
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	943	<p>Once checked out from the Subversion repository, the LLVM suite source
				944	code must be
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	945	configured via the <tt>configure</tt> script. This script sets variables in the
				946	various <tt>*.in</tt> files, most notably <tt>llvm/Makefile.config</tt> and
				947	<tt>llvm/include/Config/config.h</tt>. It also populates <i>OBJ_ROOT</i> with
				948	the Makefiles needed to begin building LLVM.</p>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	949
				950	<p>The following environment variables are used by the <tt>configure</tt>
				951	script to configure the build system:</p>
				952
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	953	<table summary="LLVM configure script environment variables">
Reid Spencer	d3f876c	2004-11-01 08:19:36 +0000	[diff] [blame]	954	<tr><th>Variable</th><th>Purpose</th></tr>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	955	<tr>
				956	<td>CC</td>
				957	<td>Tells <tt>configure</tt> which C compiler to use. By default,
				958	<tt>configure</tt> will look for the first GCC C compiler in
				959	<tt>PATH</tt>. Use this variable to override
				960	<tt>configure</tt>'s default behavior.</td>
				961	</tr>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	962	<tr>
				963	<td>CXX</td>
				964	<td>Tells <tt>configure</tt> which C++ compiler to use. By default,
				965	<tt>configure</tt> will look for the first GCC C++ compiler in
				966	<tt>PATH</tt>. Use this variable to override
				967	<tt>configure</tt>'s default behavior.</td>
				968	</tr>
				969	</table>
				970
				971	<p>The following options can be used to set or enable LLVM specific options:</p>
				972
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	973	<dl>
Reid Spencer	fef93b7	2004-12-26 05:47:26 +0000	[diff] [blame]	974	<dt><i>--with-llvmgccdir</i></dt>
				975	<dd>Path to the LLVM C/C++ FrontEnd to be used with this LLVM configuration.
				976	The value of this option should specify the full pathname of the C/C++ Front
				977	End to be used. If this option is not provided, the PATH will be searched for
				978	a program named <i>llvm-gcc</i> and the C/C++ FrontEnd install directory will
				979	be inferred from the path found. If the option is not given, and no llvm-gcc
				980	can be found in the path then a warning will be produced by
				981	<tt>configure</tt> indicating this situation. LLVM may still be built with
				982	the <tt>tools-only</tt> target but attempting to build the runtime libraries
				983	will fail as these libraries require llvm-gcc and llvm-g++. See
				984	<a href="#installcf">Install the GCC Front End</a> for details on installing
				985	the C/C++ Front End. See
Duncan Sands	8655b15	2008-02-14 17:53:22 +0000	[diff] [blame]	986	<a href="GCCFEBuildInstrs.html">Bootstrapping the LLVM C/C++ Front-End</a>
Reid Spencer	fef93b7	2004-12-26 05:47:26 +0000	[diff] [blame]	987	for details on building the C/C++ Front End.</dd>
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	988	<dt><i>--with-tclinclude</i></dt>
John Criswell	8bfe6a7	2005-05-18 19:43:33 +0000	[diff] [blame]	989	<dd>Path to the tcl include directory under which <tt>tclsh</tt> can be
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	990	found. Use this if you have multiple tcl installations on your machine and you
				991	want to use a specific one (8.x) for LLVM. LLVM only uses tcl for running the
				992	dejagnu based test suite in <tt>llvm/test</tt>. If you don't specify this
John Criswell	8bfe6a7	2005-05-18 19:43:33 +0000	[diff] [blame]	993	option, the LLVM configure script will search for the tcl 8.4 and 8.3
				994	releases.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	995	<br><br>
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	996	</dd>
				997	<dt><i>--enable-optimized</i></dt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	998	<dd>
Chris Lattner	efdb3bc	2009-04-25 22:24:49 +0000	[diff] [blame]	999	Enables optimized compilation (debugging symbols are removed
				1000	and GCC optimization flags are enabled). Note that this is the default
				1001	setting if you are using the LLVM distribution. The default behavior
				1002	of an Subversion checkout is to use an unoptimized build (also known as a
				1003	debug build).
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1004	<br><br>
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1005	</dd>
Reid Spencer	9d57b4d	2005-12-21 03:46:45 +0000	[diff] [blame]	1006	<dt><i>--enable-debug-runtime</i></dt>
				1007	<dd>
				1008	Enables debug symbols in the runtime libraries. The default is to strip
				1009	debug symbols from the runtime libraries.
				1010	</dd>
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1011	<dt><i>--enable-jit</i></dt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1012	<dd>
John Criswell	d000e1d	2003-12-18 16:43:17 +0000	[diff] [blame]	1013	Compile the Just In Time (JIT) compiler functionality. This is not
				1014	available
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1015	on all platforms. The default is dependent on platform, so it is best
				1016	to explicitly enable it if you want it.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1017	<br><br>
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1018	</dd>
Reid Spencer	2dedcf5	2005-04-22 17:58:03 +0000	[diff] [blame]	1019	<dt><i>--enable-targets=</i><tt>target-option</tt></dt>
				1020	<dd>Controls which targets will be built and linked into llc. The default
				1021	value for <tt>target_options</tt> is "all" which builds and links all
				1022	available targets. The value "host-only" can be specified to build only a
				1023	native compiler (no cross-compiler targets available). The "native" target is
				1024	selected as the target of the build host. You can also specify a comma
				1025	separated list of target names that you want available in llc. The target
Misha Brukman	f00ddb0	2008-12-11 18:23:24 +0000	[diff] [blame]	1026	names use all lower case. The current set of targets is: <br>
Reid Spencer	2dedcf5	2005-04-22 17:58:03 +0000	[diff] [blame]	1027	<tt>alpha, ia64, powerpc, skeleton, sparc, x86</tt>.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1028	<br><br></dd>
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1029	<dt><i>--enable-doxygen</i></dt>
				1030	<dd>Look for the doxygen program and enable construction of doxygen based
				1031	documentation from the source code. This is disabled by default because
				1032	generating the documentation can take a long time and producess 100s of
				1033	megabytes of output.</dd>
Anton Korobeynikov	8cea37b	2007-01-23 12:35:46 +0000	[diff] [blame]	1034	<dt><i>--with-udis86</i></dt>
				1035	<dd>LLVM can use external disassembler library for various purposes (now it's
				1036	used only for examining code produced by JIT). This option will enable usage
				1037	of <a href="http://udis86.sourceforge.net/">udis86</a> x86 (both 32 and 64
				1038	bits) disassembler library.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1039	</dl>
				1040
				1041	<p>To configure LLVM, follow these steps:</p>
				1042
				1043	<ol>
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1044	<li><p>Change directory into the object root directory:</p>
John Criswell	0f6d7c0	2003-10-27 18:18:16 +0000	[diff] [blame]	1045
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1046	<div class="doc_code"><pre>% cd <i>OBJ_ROOT</i></pre></div></li>
				1047
				1048	<li><p>Run the <tt>configure</tt> script located in the LLVM source
				1049	tree:</p>
				1050
				1051	<div class="doc_code">
				1052	<pre>% <i>SRC_ROOT</i>/configure --prefix=/install/path [other options]</pre>
				1053	</div></li>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1054	</ol>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1055
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1056	</div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1057
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1058	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1059	<h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1060	<a name="compile">Compiling the LLVM Suite Source Code</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1061	</h3>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1062
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1063	<div>
John Criswell	0b45920	2003-07-08 20:35:59 +0000	[diff] [blame]	1064
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1065	<p>Once you have configured LLVM, you can build it. There are three types of
				1066	builds:</p>
John Criswell	0b45920	2003-07-08 20:35:59 +0000	[diff] [blame]	1067
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1068	<dl>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1069	<dt>Debug Builds
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1070	<dd>
Chris Lattner	efdb3bc	2009-04-25 22:24:49 +0000	[diff] [blame]	1071	These builds are the default when one is using an Subversion checkout and
				1072	types <tt>gmake</tt> (unless the <tt>--enable-optimized</tt> option was
				1073	used during configuration). The build system will compile the tools and
				1074	libraries with debugging information. To get a Debug Build using the
				1075	LLVM distribution the <tt>--disable-optimized</tt> option must be passed
				1076	to <tt>configure</tt>.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1077	<br><br>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1078
				1079	<dt>Release (Optimized) Builds
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1080	<dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1081	These builds are enabled with the <tt>--enable-optimized</tt> option to
				1082	<tt>configure</tt> or by specifying <tt>ENABLE_OPTIMIZED=1</tt> on the
				1083	<tt>gmake</tt> command line. For these builds, the build system will
				1084	compile the tools and libraries with GCC optimizations enabled and strip
				1085	debugging information from the libraries and executables it generates.
Chris Lattner	efdb3bc	2009-04-25 22:24:49 +0000	[diff] [blame]	1086	Note that Release Builds are default when using an LLVM distribution.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1087	<br><br>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1088
				1089	<dt>Profile Builds
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1090	<dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1091	These builds are for use with profiling. They compile profiling
				1092	information into the code for use with programs like <tt>gprof</tt>.
				1093	Profile builds must be started by specifying <tt>ENABLE_PROFILING=1</tt>
				1094	on the <tt>gmake</tt> command line.
				1095	</dl>
John Criswell	7a73b80	2003-06-30 21:59:07 +0000	[diff] [blame]	1096
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1097	<p>Once you have LLVM configured, you can build it by entering the
				1098	<i>OBJ_ROOT</i> directory and issuing the following command:</p>
John Criswell	20d2d3e	2003-10-10 14:26:14 +0000	[diff] [blame]	1099
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1100	<div class="doc_code"><pre>% gmake</pre></div>
John Criswell	20d2d3e	2003-10-10 14:26:14 +0000	[diff] [blame]	1101
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	1102	<p>If the build fails, please <a href="#brokengcc">check here</a> to see if you
John Criswell	3d8ba51	2004-12-08 17:53:54 +0000	[diff] [blame]	1103	are using a version of GCC that is known not to compile LLVM.</p>
Chris Lattner	95e9258	2004-07-18 22:32:22 +0000	[diff] [blame]	1104
				1105	<p>
				1106	If you have multiple processors in your machine, you may wish to use some of
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1107	the parallel build options provided by GNU Make. For example, you could use the
				1108	command:</p>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1109
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1110	<div class="doc_code"><pre>% gmake -j2</pre></div>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1111
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1112	<p>There are several special targets which are useful when working with the LLVM
				1113	source code:</p>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1114
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1115	<dl>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1116	<dt><tt>gmake clean</tt>
				1117	<dd>
				1118	Removes all files generated by the build. This includes object files,
				1119	generated C/C++ files, libraries, and executables.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1120	<br><br>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1121
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1122	<dt><tt>gmake dist-clean</tt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1123	<dd>
Misha Brukman	ad38e96	2004-08-21 23:40:49 +0000	[diff] [blame]	1124	Removes everything that <tt>gmake clean</tt> does, but also removes files
				1125	generated by <tt>configure</tt>. It attempts to return the source tree to the
				1126	original state in which it was shipped.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1127	<br><br>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1128
Misha Brukman	e51c356	2004-08-23 20:25:33 +0000	[diff] [blame]	1129	<dt><tt>gmake install</tt>
				1130	<dd>
John Criswell	3d8ba51	2004-12-08 17:53:54 +0000	[diff] [blame]	1131	Installs LLVM header files, libraries, tools, and documentation in a
				1132	hierarchy
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1133	under $PREFIX, specified with <tt>./configure --prefix=[dir]</tt>, which
				1134	defaults to <tt>/usr/local</tt>.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1135	<br><br>
				1136
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1137	<dt><tt>gmake -C runtime install-bytecode</tt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1138	<dd>
Reid Spencer	7863c40	2004-11-11 07:30:27 +0000	[diff] [blame]	1139	Assuming you built LLVM into $OBJDIR, when this command is run, it will
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1140	install bitcode libraries into the GCC front end's bitcode library
				1141	directory. If you need to update your bitcode libraries,
Misha Brukman	ad38e96	2004-08-21 23:40:49 +0000	[diff] [blame]	1142	this is the target to use once you've built them.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1143	<br><br>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1144	</dl>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1145
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1146	<p>Please see the <a href="MakefileGuide.html">Makefile Guide</a> for further
				1147	details on these <tt>make</tt> targets and descriptions of other targets
				1148	available.</p>
				1149
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1150	<p>It is also possible to override default values from <tt>configure</tt> by
				1151	declaring variables on the command line. The following are some examples:</p>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1152
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1153	<dl>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1154	<dt><tt>gmake ENABLE_OPTIMIZED=1</tt>
				1155	<dd>
				1156	Perform a Release (Optimized) build.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1157	<br><br>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1158
Reid Spencer	004ba03	2006-04-09 23:45:38 +0000	[diff] [blame]	1159	<dt><tt>gmake ENABLE_OPTIMIZED=1 DISABLE_ASSERTIONS=1</tt>
Chris Lattner	d465126	2006-03-21 01:10:57 +0000	[diff] [blame]	1160	<dd>
Reid Spencer	004ba03	2006-04-09 23:45:38 +0000	[diff] [blame]	1161	Perform a Release (Optimized) build without assertions enabled.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1162	<br><br>
Chris Lattner	efdb3bc	2009-04-25 22:24:49 +0000	[diff] [blame]	1163
				1164	<dt><tt>gmake ENABLE_OPTIMIZED=0</tt>
				1165	<dd>
				1166	Perform a Debug build.
				1167	<br><br>
Chris Lattner	d465126	2006-03-21 01:10:57 +0000	[diff] [blame]	1168
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1169	<dt><tt>gmake ENABLE_PROFILING=1</tt>
				1170	<dd>
				1171	Perform a Profiling build.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1172	<br><br>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1173
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1174	<dt><tt>gmake VERBOSE=1</tt>
				1175	<dd>
				1176	Print what <tt>gmake</tt> is doing on standard output.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1177	<br><br>
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1178
				1179	<dt><tt>gmake TOOL_VERBOSE=1</tt></dt>
				1180	<dd>Ask each tool invoked by the makefiles to print out what it is doing on
John Criswell	3d8ba51	2004-12-08 17:53:54 +0000	[diff] [blame]	1181	the standard output. This also implies <tt>VERBOSE=1</tt>.
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1182	<br><br></dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1183	</dl>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1184
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1185	<p>Every directory in the LLVM object tree includes a <tt>Makefile</tt> to build
				1186	it and any subdirectories that it contains. Entering any directory inside the
				1187	LLVM object tree and typing <tt>gmake</tt> should rebuild anything in or below
				1188	that directory that is out of date.</p>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1189
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1190	</div>
John Criswell	20d2d3e	2003-10-10 14:26:14 +0000	[diff] [blame]	1191
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1192	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1193	<h3>
Reid Spencer	d30a971	2006-07-27 06:41:31 +0000	[diff] [blame]	1194	<a name="cross-compile">Cross-Compiling LLVM</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1195	</h3>
Reid Spencer	17850ef	2006-07-27 05:43:30 +0000	[diff] [blame]	1196
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1197	<div>
Jim Grosbach	5bea822	2009-04-17 17:25:16 +0000	[diff] [blame]	1198	<p>It is possible to cross-compile LLVM itself. That is, you can create LLVM
				1199	executables and libraries to be hosted on a platform different from the
				1200	platform where they are build (a Canadian Cross build). To configure a
				1201	cross-compile, supply the configure script with <tt>--build</tt> and
				1202	<tt>--host</tt> options that are different. The values of these options must
				1203	be legal target triples that your GCC compiler supports.</p>
				1204
				1205	<p>The result of such a build is executables that are not runnable on
				1206	on the build host (--build option) but can be executed on the compile host
Reid Spencer	d30a971	2006-07-27 06:41:31 +0000	[diff] [blame]	1207	(--host option).</p>
Reid Spencer	17850ef	2006-07-27 05:43:30 +0000	[diff] [blame]	1208	</div>
				1209
				1210	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1211	<h3>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1212	<a name="objfiles">The Location of LLVM Object Files</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1213	</h3>
John Criswell	20d2d3e	2003-10-10 14:26:14 +0000	[diff] [blame]	1214
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1215	<div>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1216
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1217	<p>The LLVM build system is capable of sharing a single LLVM source tree among
				1218	several LLVM builds. Hence, it is possible to build LLVM for several different
				1219	platforms or configurations using the same source tree.</p>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1220
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1221	<p>This is accomplished in the typical autoconf manner:</p>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1222
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1223	<ul>
				1224	<li><p>Change directory to where the LLVM object files should live:</p>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1225
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1226	<div class="doc_code"><pre>% cd <i>OBJ_ROOT</i></pre></div></li>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1227
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1228	<li><p>Run the <tt>configure</tt> script found in the LLVM source
				1229	directory:</p>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1230
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1231	<div class="doc_code"><pre>% <i>SRC_ROOT</i>/configure</pre></div></li>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1232	</ul>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1233
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1234	<p>The LLVM build will place files underneath <i>OBJ_ROOT</i> in directories
				1235	named after the build type:</p>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1236
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1237	<dl>
Duncan Sands	67f8a7b	2010-07-08 08:27:18 +0000	[diff] [blame]	1238	<dt>Debug Builds with assertions enabled (the default)
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1239	<dd>
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1240	<dl>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1241	<dt>Tools
Duncan Sands	67f8a7b	2010-07-08 08:27:18 +0000	[diff] [blame]	1242	<dd><tt><i>OBJ_ROOT</i>/Debug+Asserts/bin</tt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1243	<dt>Libraries
Duncan Sands	67f8a7b	2010-07-08 08:27:18 +0000	[diff] [blame]	1244	<dd><tt><i>OBJ_ROOT</i>/Debug+Asserts/lib</tt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1245	</dl>
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1246	<br><br>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1247
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1248	<dt>Release Builds
				1249	<dd>
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1250	<dl>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1251	<dt>Tools
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1252	<dd><tt><i>OBJ_ROOT</i>/Release/bin</tt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1253	<dt>Libraries
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1254	<dd><tt><i>OBJ_ROOT</i>/Release/lib</tt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1255	</dl>
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1256	<br><br>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1257
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1258	<dt>Profile Builds
				1259	<dd>
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1260	<dl>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1261	<dt>Tools
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1262	<dd><tt><i>OBJ_ROOT</i>/Profile/bin</tt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1263	<dt>Libraries
Reid Spencer	66db92e	2004-12-08 16:51:31 +0000	[diff] [blame]	1264	<dd><tt><i>OBJ_ROOT</i>/Profile/lib</tt>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1265	</dl>
				1266	</dl>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1267
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1268	</div>
Chris Lattner	7fe7f81	2002-07-24 19:51:14 +0000	[diff] [blame]	1269
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1270	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1271	<h3>
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1272	<a name="optionalconfig">Optional Configuration Items</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1273	</h3>
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1274
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1275	<div>
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1276
				1277	<p>
Misha Brukman	9106eca	2005-02-03 22:25:23 +0000	[diff] [blame]	1278	If you're running on a Linux system that supports the "<a
Bill Wendling	22e37c3	2007-07-16 08:46:40 +0000	[diff] [blame]	1279	href="http://www.tat.physik.uni-tuebingen.de/~rguenth/linux/binfmt_misc.html">binfmt_misc</a>"
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1280	module, and you have root access on the system, you can set your system up to
Bill Wendling	22e37c3	2007-07-16 08:46:40 +0000	[diff] [blame]	1281	execute LLVM bitcode files directly. To do this, use commands like this (the
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1282	first command may not be required if you are already using the module):</p>
				1283
Misha Brukman	9106eca	2005-02-03 22:25:23 +0000	[diff] [blame]	1284	<div class="doc_code">
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1285	<pre>
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1286	$ mount -t binfmt_misc none /proc/sys/fs/binfmt_misc
Nick Lewycky	e6b5a52	2009-11-04 06:15:28 +0000	[diff] [blame]	1287	$ echo ':llvm:M::BC::/path/to/lli:' > /proc/sys/fs/binfmt_misc/register
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1288	$ chmod u+x hello.bc (if needed)
				1289	$ ./hello.bc
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1290	</pre>
Misha Brukman	9106eca	2005-02-03 22:25:23 +0000	[diff] [blame]	1291	</div>
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1292
				1293	<p>
Chris Lattner	3bc3d3c	2010-02-17 18:33:13 +0000	[diff] [blame]	1294	This allows you to execute LLVM bitcode files directly. On Debian, you
NAKAMURA Takumi	4d6deb0	2011-04-09 09:51:57 +0000	[diff] [blame]	1295	can also use this command instead of the 'echo' command above:
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1296	</p>
				1297
Chris Lattner	3bc3d3c	2010-02-17 18:33:13 +0000	[diff] [blame]	1298	<div class="doc_code">
				1299	<pre>
				1300	$ sudo update-binfmts --install llvm /path/to/lli --magic 'BC'
				1301	</pre>
				1302	</div>
				1303
Chris Lattner	a553f62	2004-03-25 20:38:40 +0000	[diff] [blame]	1304	</div>
				1305
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1306	</div>
				1307
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1308	<!-- *********************************************************************** -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1309	<h2>
				1310	<a name="layout">Program Layout</a>
				1311	</h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1312	<!-- *********************************************************************** -->
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1313
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1314	<div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1315
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1316	<p>One useful source of information about the LLVM source base is the LLVM <a
NAKAMURA Takumi	b9a3363	2011-04-09 02:13:37 +0000	[diff] [blame]	1317	href="http://www.doxygen.org/">doxygen</a> documentation available at <tt><a
Reid Spencer	05fe4b0	2006-03-14 05:39:39 +0000	[diff] [blame]	1318	href="http://llvm.org/doxygen/">http://llvm.org/doxygen/</a></tt>.
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1319	The following is a brief introduction to code layout:</p>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1320
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1321	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1322	<h3>
				1323	<a name="examples"><tt>llvm/examples</tt></a>
				1324	</h3>
				1325
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1326	<div>
Reid Spencer	c4b09ba	2004-12-08 16:18:26 +0000	[diff] [blame]	1327	<p>This directory contains some simple examples of how to use the LLVM IR and
				1328	JIT.</p>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1329	</div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1330
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1331	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1332	<h3>
				1333	<a name="include"><tt>llvm/include</tt></a>
				1334	</h3>
				1335
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1336	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1337
				1338	<p>This directory contains public header files exported from the LLVM
				1339	library. The three main subdirectories of this directory are:</p>
				1340
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1341	<dl>
				1342	<dt><tt><b>llvm/include/llvm</b></tt></dt>
				1343	<dd>This directory contains all of the LLVM specific header files. This
				1344	directory also has subdirectories for different portions of LLVM:
				1345	<tt>Analysis</tt>, <tt>CodeGen</tt>, <tt>Target</tt>, <tt>Transforms</tt>,
				1346	etc...</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1347
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1348	<dt><tt><b>llvm/include/llvm/Support</b></tt></dt>
				1349	<dd>This directory contains generic support libraries that are provided with
				1350	LLVM but not necessarily specific to LLVM. For example, some C++ STL utilities
				1351	and a Command Line option processing library store their header files here.
				1352	</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1353
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1354	<dt><tt><b>llvm/include/llvm/Config</b></tt></dt>
				1355	<dd>This directory contains header files configured by the <tt>configure</tt>
				1356	script. They wrap "standard" UNIX and C header files. Source code can
				1357	include these header files which automatically take care of the conditional
				1358	#includes that the <tt>configure</tt> script generates.</dd>
				1359	</dl>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1360	</div>
				1361
				1362	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1363	<h3>
				1364	<a name="lib"><tt>llvm/lib</tt></a>
				1365	</h3>
				1366
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1367	<div>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1368
				1369	<p>This directory contains most of the source files of the LLVM system. In LLVM,
				1370	almost all code exists in libraries, making it very easy to share code among the
				1371	different <a href="#tools">tools</a>.</p>
				1372
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1373	<dl>
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1374	<dt><tt><b>llvm/lib/VMCore/</b></tt></dt>
				1375	<dd> This directory holds the core LLVM source files that implement core
				1376	classes like Instruction and BasicBlock.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1377
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1378	<dt><tt><b>llvm/lib/AsmParser/</b></tt></dt>
				1379	<dd>This directory holds the source code for the LLVM assembly language parser
				1380	library.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1381
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1382	<dt><tt><b>llvm/lib/BitCode/</b></tt></dt>
				1383	<dd>This directory holds code for reading and write LLVM bitcode.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1384
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1385	<dt><tt><b>llvm/lib/Analysis/</b></tt><dd>This directory contains a variety of
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1386	different program analyses, such as Dominator Information, Call Graphs,
				1387	Induction Variables, Interval Identification, Natural Loop Identification,
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1388	etc.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1389
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1390	<dt><tt><b>llvm/lib/Transforms/</b></tt></dt>
				1391	<dd> This directory contains the source code for the LLVM to LLVM program
				1392	transformations, such as Aggressive Dead Code Elimination, Sparse Conditional
				1393	Constant Propagation, Inlining, Loop Invariant Code Motion, Dead Global
				1394	Elimination, and many others.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1395
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1396	<dt><tt><b>llvm/lib/Target/</b></tt></dt>
				1397	<dd> This directory contains files that describe various target architectures
Chris Lattner	2a60703	2006-04-20 17:42:23 +0000	[diff] [blame]	1398	for code generation. For example, the <tt>llvm/lib/Target/X86</tt>
				1399	directory holds the X86 machine description while
John Criswell	8bfe6a7	2005-05-18 19:43:33 +0000	[diff] [blame]	1400	<tt>llvm/lib/Target/CBackend</tt> implements the LLVM-to-C converter.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1401
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1402	<dt><tt><b>llvm/lib/CodeGen/</b></tt></dt>
				1403	<dd> This directory contains the major parts of the code generator: Instruction
				1404	Selector, Instruction Scheduling, and Register Allocation.</dd>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1405
NAKAMURA Takumi	a8b3e18	2011-04-05 08:24:15 +0000	[diff] [blame]	1406	<dt><tt><b>llvm/lib/MC/</b></tt></dt>
				1407	<dd>(FIXME: T.B.D.)</dd>
				1408
				1409	<!--FIXME: obsoleted -->
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1410	<dt><tt><b>llvm/lib/Debugger/</b></tt></dt>
				1411	<dd> This directory contains the source level debugger library that makes
				1412	it possible to instrument LLVM programs so that a debugger could identify
				1413	source code locations at which the program is executing.</dd>
				1414
				1415	<dt><tt><b>llvm/lib/ExecutionEngine/</b></tt></dt>
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1416	<dd> This directory contains libraries for executing LLVM bitcode directly
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1417	at runtime in both interpreted and JIT compiled fashions.</dd>
				1418
				1419	<dt><tt><b>llvm/lib/Support/</b></tt></dt>
				1420	<dd> This directory contains the source code that corresponds to the header
				1421	files located in <tt>llvm/include/Support/</tt>.</dd>
				1422
NAKAMURA Takumi	a8b3e18	2011-04-05 08:24:15 +0000	[diff] [blame]	1423	<!--FIXME: obsoleted -->
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1424	<dt><tt><b>llvm/lib/System/</b></tt></dt>
				1425	<dd>This directory contains the operating system abstraction layer that
				1426	shields LLVM from platform-specific coding.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1427	</dl>
John Criswell	7a73b80	2003-06-30 21:59:07 +0000	[diff] [blame]	1428
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1429	</div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1430
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1431	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1432	<h3>
				1433	<a name="projects"><tt>llvm/projects</tt></a>
				1434	</h3>
				1435
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1436	<div>
Reid Spencer	c4b09ba	2004-12-08 16:18:26 +0000	[diff] [blame]	1437	<p>This directory contains projects that are not strictly part of LLVM but are
				1438	shipped with LLVM. This is also the directory where you should create your own
				1439	LLVM-based projects. See <tt>llvm/projects/sample</tt> for an example of how
Chris Lattner	4630e4d	2008-08-11 06:13:31 +0000	[diff] [blame]	1440	to set up your own project.</p>
Reid Spencer	c4b09ba	2004-12-08 16:18:26 +0000	[diff] [blame]	1441	</div>
				1442
				1443	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1444	<h3>
				1445	<a name="runtime"><tt>llvm/runtime</tt></a>
				1446	</h3>
				1447
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1448	<div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1449
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1450	<p>This directory contains libraries which are compiled into LLVM bitcode and
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1451	used when linking programs with the GCC front end. Most of these libraries are
				1452	skeleton versions of real libraries; for example, libc is a stripped down
				1453	version of glibc.</p>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1454
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1455	<p>Unlike the rest of the LLVM suite, this directory needs the LLVM GCC front
				1456	end to compile.</p>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1457
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1458	</div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1459
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1460	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1461	<h3>
				1462	<a name="test"><tt>llvm/test</tt></a>
				1463	</h3>
				1464
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1465	<div>
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1466	<p>This directory contains feature and regression tests and other basic sanity
				1467	checks on the LLVM infrastructure. These are intended to run quickly and cover
				1468	a lot of territory without being exhaustive.</p>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1469	</div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1470
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1471	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1472	<h3>
				1473	<a name="test-suite"><tt>test-suite</tt></a>
				1474	</h3>
				1475
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1476	<div>
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	1477	<p>This is not a directory in the normal llvm module; it is a separate
				1478	Subversion
				1479	module that must be checked out (usually to <tt>projects/test-suite</tt>).
				1480	This
John Criswell	3d8ba51	2004-12-08 17:53:54 +0000	[diff] [blame]	1481	module contains a comprehensive correctness, performance, and benchmarking
				1482	test
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	1483	suite for LLVM. It is a separate Subversion module because not every LLVM
				1484	user is
John Criswell	838bce5	2005-05-09 16:39:27 +0000	[diff] [blame]	1485	interested in downloading or building such a comprehensive test suite. For
				1486	further details on this test suite, please see the
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1487	<a href="TestingGuide.html">Testing Guide</a> document.</p>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1488	</div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1489
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1490	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1491	<h3>
				1492	<a name="tools"><tt>llvm/tools</tt></a>
				1493	</h3>
				1494
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1495	<div>
John Criswell	20d2d3e	2003-10-10 14:26:14 +0000	[diff] [blame]	1496
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1497	<p>The <b>tools</b> directory contains the executables built out of the
				1498	libraries above, which form the main part of the user interface. You can
Duncan Sands	7e7ae5a	2010-02-18 14:08:13 +0000	[diff] [blame]	1499	always get help for a tool by typing <tt>tool_name -help</tt>. The
Misha Brukman	e12215f	2004-11-15 23:20:51 +0000	[diff] [blame]	1500	following is a brief introduction to the most important tools. More detailed
				1501	information is in the <a href="CommandGuide/index.html">Command Guide</a>.</p>
John Criswell	20d2d3e	2003-10-10 14:26:14 +0000	[diff] [blame]	1502
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1503	<dl>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1504
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1505	<dt><tt><b>bugpoint</b></tt></dt>
				1506	<dd><tt>bugpoint</tt> is used to debug
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1507	optimization passes or code generation backends by narrowing down the
				1508	given test case to the minimum number of passes and/or instructions that
				1509	still cause a problem, whether it is a crash or miscompilation. See <a
				1510	href="HowToSubmitABug.html">HowToSubmitABug.html</a> for more information
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1511	on using <tt>bugpoint</tt>.</dd>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1512
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1513	<dt><tt><b>llvmc</b></tt></dt>
				1514	<dd>The LLVM Compiler Driver. This program can
				1515	be configured to utilize both LLVM and non-LLVM compilation tools to enable
				1516	pre-processing, translation, optimization, assembly, and linking of programs
				1517	all from one command line. <tt>llvmc</tt> also takes care of processing the
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1518	dependent libraries found in bitcode. This reduces the need to get the
Reid Spencer	079e945	2004-12-08 18:00:30 +0000	[diff] [blame]	1519	traditional <tt>-l<name></tt> options right on the command line. Please
John Criswell	8bfe6a7	2005-05-18 19:43:33 +0000	[diff] [blame]	1520	note that this tool, while functional, is still experimental and not feature
				1521	complete.</dd>
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1522
				1523	<dt><tt><b>llvm-ar</b></tt></dt>
				1524	<dd>The archiver produces an archive containing
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1525	the given LLVM bitcode files, optionally with an index for faster
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1526	lookup.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1527
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1528	<dt><tt><b>llvm-as</b></tt></dt>
				1529	<dd>The assembler transforms the human readable LLVM assembly to LLVM
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1530	bitcode.</dd>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1531
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1532	<dt><tt><b>llvm-dis</b></tt></dt>
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1533	<dd>The disassembler transforms the LLVM bitcode to human readable
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1534	LLVM assembly.</dd>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1535
Reid Spencer	079e945	2004-12-08 18:00:30 +0000	[diff] [blame]	1536	<dt><tt><b>llvm-ld</b></tt></dt>
Reid Spencer	434262a	2007-02-09 15:59:08 +0000	[diff] [blame]	1537	<dd><tt>llvm-ld</tt> is a general purpose and extensible linker for LLVM.
Andrew Trick	bcf0116	2010-09-23 20:26:44 +0000	[diff] [blame]	1538	This is the linker invoked by <tt>llvmc</tt>. It performs standard link time
Reid Spencer	434262a	2007-02-09 15:59:08 +0000	[diff] [blame]	1539	optimizations and allows optimization modules to be loaded and run so that
				1540	language specific optimizations can be applied at link time.</dd>
Reid Spencer	079e945	2004-12-08 18:00:30 +0000	[diff] [blame]	1541
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1542	<dt><tt><b>llvm-link</b></tt></dt>
				1543	<dd><tt>llvm-link</tt>, not surprisingly, links multiple LLVM modules into
				1544	a single program.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1545
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1546	<dt><tt><b>lli</b></tt></dt>
				1547	<dd><tt>lli</tt> is the LLVM interpreter, which
Nick Lewycky	64270d5	2007-12-03 01:58:01 +0000	[diff] [blame]	1548	can directly execute LLVM bitcode (although very slowly...). For architectures
				1549	that support it (currently x86, Sparc, and PowerPC), by default, <tt>lli</tt>
				1550	will function as a Just-In-Time compiler (if the functionality was compiled
				1551	in), and will execute the code <i>much</i> faster than the interpreter.</dd>
Misha Brukman	ef0ad41	2003-10-06 19:23:34 +0000	[diff] [blame]	1552
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1553	<dt><tt><b>llc</b></tt></dt>
				1554	<dd> <tt>llc</tt> is the LLVM backend compiler, which
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1555	translates LLVM bitcode to a native code assembly file or to C code (with
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1556	the -march=c option).</dd>
Misha Brukman	ef0ad41	2003-10-06 19:23:34 +0000	[diff] [blame]	1557
Reid Spencer	d4694f9	2004-12-22 06:29:07 +0000	[diff] [blame]	1558	<dt><tt><b>llvm-gcc</b></tt></dt>
Reid Spencer	434262a	2007-02-09 15:59:08 +0000	[diff] [blame]	1559	<dd><tt>llvm-gcc</tt> is a GCC-based C frontend that has been retargeted to
				1560	use LLVM as its backend instead of GCC's RTL backend. It can also emit LLVM
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1561	bitcode or assembly (with the <tt>-emit-llvm</tt> option) instead of the
Reid Spencer	434262a	2007-02-09 15:59:08 +0000	[diff] [blame]	1562	usual machine code output. It works just like any other GCC compiler,
				1563	taking the typical <tt>-c, -S, -E, -o</tt> options that are typically used.
				1564	Additionally, the the source code for <tt>llvm-gcc</tt> is available as a
John Criswell	9c29bfb	2007-06-29 19:12:31 +0000	[diff] [blame]	1565	separate Subversion module.</dd>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1566
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1567	<dt><tt><b>opt</b></tt></dt>
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1568	<dd><tt>opt</tt> reads LLVM bitcode, applies a series of LLVM to LLVM
Reid Spencer	84f82f7	2006-08-28 00:34:19 +0000	[diff] [blame]	1569	transformations (which are specified on the command line), and then outputs
Duncan Sands	7e7ae5a	2010-02-18 14:08:13 +0000	[diff] [blame]	1570	the resultant bitcode. The '<tt>opt -help</tt>' command is a good way to
Misha Brukman	f00ddb0	2008-12-11 18:23:24 +0000	[diff] [blame]	1571	get a list of the program transformations available in LLVM.<br>
Reid Spencer	84f82f7	2006-08-28 00:34:19 +0000	[diff] [blame]	1572	<dd><tt>opt</tt> can also be used to run a specific analysis on an input
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1573	LLVM bitcode file and print out the results. It is primarily useful for
Reid Spencer	84f82f7	2006-08-28 00:34:19 +0000	[diff] [blame]	1574	debugging analyses, or familiarizing yourself with what an analysis does.</dd>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1575	</dl>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1576	</div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1577
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1578	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1579	<h3>
				1580	<a name="utils"><tt>llvm/utils</tt></a>
				1581	</h3>
				1582
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1583	<div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1584
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1585	<p>This directory contains utilities for working with LLVM source code, and some
				1586	of the utilities are actually required as part of the build process because they
				1587	are code generators for parts of LLVM infrastructure.</p>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1588
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1589	<dl>
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1590	<dt><tt><b>codegen-diff</b></tt> <dd><tt>codegen-diff</tt> is a script
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1591	that finds differences between code that LLC generates and code that LLI
				1592	generates. This is a useful tool if you are debugging one of them,
				1593	assuming that the other generates correct output. For the full user
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1594	manual, run <tt>`perldoc codegen-diff'</tt>.<br><br>
Misha Brukman	c103adf	2003-08-11 18:45:46 +0000	[diff] [blame]	1595
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1596	<dt><tt><b>emacs/</b></tt> <dd>The <tt>emacs</tt> directory contains
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1597	syntax-highlighting files which will work with Emacs and XEmacs editors,
				1598	providing syntax highlighting support for LLVM assembly files and TableGen
				1599	description files. For information on how to use the syntax files, consult
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1600	the <tt>README</tt> file in that directory.<br><br>
Misha Brukman	c103adf	2003-08-11 18:45:46 +0000	[diff] [blame]	1601
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1602	<dt><tt><b>getsrcs.sh</b></tt> <dd>The <tt>getsrcs.sh</tt> script finds
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1603	and outputs all non-generated source files, which is useful if one wishes
				1604	to do a lot of development across directories and does not want to
				1605	individually find each file. One way to use it is to run, for example:
				1606	<tt>xemacs `utils/getsources.sh`</tt> from the top of your LLVM source
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1607	tree.<br><br>
				1608
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1609	<dt><tt><b>llvmgrep</b></tt></dt>
				1610	<dd>This little tool performs an "egrep -H -n" on each source file in LLVM and
				1611	passes to it a regular expression provided on <tt>llvmgrep</tt>'s command
				1612	line. This is a very efficient way of searching the source base for a
				1613	particular regular expression.</dd>
				1614
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1615	<dt><tt><b>makellvm</b></tt> <dd>The <tt>makellvm</tt> script compiles all
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1616	files in the current directory and then compiles and links the tool that
				1617	is the first argument. For example, assuming you are in the directory
				1618	<tt>llvm/lib/Target/Sparc</tt>, if <tt>makellvm</tt> is in your path,
				1619	simply running <tt>makellvm llc</tt> will make a build of the current
				1620	directory, switch to directory <tt>llvm/tools/llc</tt> and build it,
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1621	causing a re-linking of LLC.<br><br>
Misha Brukman	c103adf	2003-08-11 18:45:46 +0000	[diff] [blame]	1622
Tanya Lattner	7a857dd	2007-05-22 06:12:51 +0000	[diff] [blame]	1623	<dt><tt><b>NewNightlyTest.pl</b></tt> and
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1624	<tt><b>NightlyTestTemplate.html</b></tt> <dd>These files are used in a
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1625	cron script to generate nightly status reports of the functionality of
				1626	tools, and the results can be seen by following the appropriate link on
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1627	the <a href="http://llvm.org/">LLVM homepage</a>.<br><br>
Misha Brukman	c103adf	2003-08-11 18:45:46 +0000	[diff] [blame]	1628
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1629	<dt><tt><b>TableGen/</b></tt> <dd>The <tt>TableGen</tt> directory contains
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1630	the tool used to generate register descriptions, instruction set
				1631	descriptions, and even assemblers from common TableGen description
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1632	files.<br><br>
Misha Brukman	c103adf	2003-08-11 18:45:46 +0000	[diff] [blame]	1633
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1634	<dt><tt><b>vim/</b></tt> <dd>The <tt>vim</tt> directory contains
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1635	syntax-highlighting files which will work with the VIM editor, providing
				1636	syntax highlighting support for LLVM assembly files and TableGen
				1637	description files. For information on how to use the syntax files, consult
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1638	the <tt>README</tt> file in that directory.<br><br>
Misha Brukman	c103adf	2003-08-11 18:45:46 +0000	[diff] [blame]	1639
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1640	</dl>
Misha Brukman	c103adf	2003-08-11 18:45:46 +0000	[diff] [blame]	1641
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1642	</div>
Misha Brukman	c103adf	2003-08-11 18:45:46 +0000	[diff] [blame]	1643
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1644	</div>
				1645
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1646	<!-- *********************************************************************** -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1647	<h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1648	<a name="tutorial">An Example Using the LLVM Tool Chain</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1649	</h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1650	<!-- *********************************************************************** -->
Misha Brukman	c103adf	2003-08-11 18:45:46 +0000	[diff] [blame]	1651
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1652	<div>
Chris Lattner	5907588	2007-01-04 07:08:27 +0000	[diff] [blame]	1653	<p>This section gives an example of using LLVM. llvm-gcc3 is now obsolete,
Chris Lattner	b357f04	2009-04-10 15:38:51 +0000	[diff] [blame]	1654	so we only include instructions for llvm-gcc4.
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1655	</p>
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1656
				1657	<p><b>Note:</b> The <i>gcc4</i> frontend's invocation is <b><i>considerably different</i></b>
				1658	from the previous <i>gcc3</i> frontend. In particular, the <i>gcc4</i> frontend <b><i>does not</i></b>
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1659	create bitcode by default: <i>gcc4</i> produces native code. As the example below illustrates,
				1660	the '--emit-llvm' flag is needed to produce LLVM bitcode output. For <i>makefiles</i> and
				1661	<i>configure</i> scripts, the CFLAGS variable needs '--emit-llvm' to produce bitcode
Chris Lattner	9abd8af	2006-09-07 04:19:09 +0000	[diff] [blame]	1662	output.</p>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1663
				1664	<!-- ======================================================================= -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1665	<h3>
				1666	<a name="tutorial4">Example with llvm-gcc4</a>
				1667	</h3>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1668
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1669	<div>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1670
				1671	<ol>
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1672	<li><p>First, create a simple C file, name it 'hello.c':</p>
				1673
				1674	<div class="doc_code">
				1675	<pre>
				1676	#include <stdio.h>
				1677
				1678	int main() {
				1679	printf("hello world\n");
				1680	return 0;
				1681	}
				1682	</pre></div></li>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1683
				1684	<li><p>Next, compile the C file into a native executable:</p>
				1685
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1686	<div class="doc_code"><pre>% llvm-gcc hello.c -o hello</pre></div>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1687
				1688	<p>Note that llvm-gcc works just like GCC by default. The standard -S and
				1689	-c arguments work as usual (producing a native .s or .o file,
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1690	respectively).</p></li>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1691
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1692	<li><p>Next, compile the C file into a LLVM bitcode file:</p>
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1693
				1694	<div class="doc_code">
				1695	<pre>% llvm-gcc -O3 -emit-llvm hello.c -c -o hello.bc</pre></div>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1696
				1697	<p>The -emit-llvm option can be used with the -S or -c options to emit an
				1698	LLVM ".ll" or ".bc" file (respectively) for the code. This allows you
				1699	to use the <a href="CommandGuide/index.html">standard LLVM tools</a> on
Gabor Greif	04367bf	2007-07-06 22:07:22 +0000	[diff] [blame]	1700	the bitcode file.</p>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1701
				1702	<p>Unlike llvm-gcc3, llvm-gcc4 correctly responds to -O[0123] arguments.
				1703	</p></li>
				1704
				1705	<li><p>Run the program in both forms. To run the program, use:</p>
				1706
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1707	<div class="doc_code"><pre>% ./hello</pre></div>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1708
				1709	<p>and</p>
				1710
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1711	<div class="doc_code"><pre>% lli hello.bc</pre></div>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1712
				1713	<p>The second examples shows how to invoke the LLVM JIT, <a
Chris Lattner	6e3b7c2	2006-08-14 20:51:35 +0000	[diff] [blame]	1714	href="CommandGuide/html/lli.html">lli</a>.</p></li>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1715
				1716	<li><p>Use the <tt>llvm-dis</tt> utility to take a look at the LLVM assembly
				1717	code:</p>
				1718
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1719	<div class="doc_code">
				1720	<pre>llvm-dis < hello.bc \| less</pre>
				1721	</div></li>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1722
				1723	<li><p>Compile the program to native assembly using the LLC code
				1724	generator:</p>
				1725
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1726	<div class="doc_code"><pre>% llc hello.bc -o hello.s</pre></div></li>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1727
				1728	<li><p>Assemble the native assembly language file into a program:</p>
				1729
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1730	<div class="doc_code">
				1731	<pre>
				1732	<b>Solaris:</b> % /opt/SUNWspro/bin/cc -xarch=v9 hello.s -o hello.native
				1733
				1734	<b>Others:</b> % gcc hello.s -o hello.native
				1735	</pre>
				1736	</div></li>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1737
				1738	<li><p>Execute the native code program:</p>
				1739
Bill Wendling	77f7469	2007-07-16 08:44:39 +0000	[diff] [blame]	1740	<div class="doc_code"><pre>% ./hello.native</pre></div>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1741
				1742	<p>Note that using llvm-gcc to compile directly to native code (i.e. when
				1743	the -emit-llvm option is not present) does steps 6/7/8 for you.</p>
Chris Lattner	6e3b7c2	2006-08-14 20:51:35 +0000	[diff] [blame]	1744	</li>
Chris Lattner	5907d40	2006-08-14 20:45:25 +0000	[diff] [blame]	1745
				1746	</ol>
				1747
				1748	</div>
				1749
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1750	</div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1751
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1752	<!-- *********************************************************************** -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1753	<h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1754	<a name="problems">Common Problems</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1755	</h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1756	<!-- *********************************************************************** -->
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1757
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1758	<div>
John Criswell	ce760f6	2003-07-03 16:01:38 +0000	[diff] [blame]	1759
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1760	<p>If you are having problems building or using LLVM, or if you have any other
				1761	general questions about LLVM, please consult the <a href="FAQ.html">Frequently
				1762	Asked Questions</a> page.</p>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1763
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1764	</div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1765
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1766	<!-- *********************************************************************** -->
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1767	<h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1768	<a name="links">Links</a>
NAKAMURA Takumi	05d0265	2011-04-18 23:59:50 +0000	[diff] [blame]	1769	</h2>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1770	<!-- *********************************************************************** -->
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1771
NAKAMURA Takumi	f5af6ad	2011-04-23 00:30:22 +0000	[diff] [blame]	1772	<div>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1773
Bill Wendling	2d4c215	2008-07-22 01:10:25 +0000	[diff] [blame]	1774	<p>This document is just an <b>introduction</b> on how to use LLVM to do
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1775	some simple things... there are many more interesting and complicated things
				1776	that you can do that aren't documented here (but we'll gladly accept a patch
				1777	if you want to write something up!). For more information about LLVM, check
				1778	out:</p>
John Criswell	85ed361	2003-06-12 19:34:44 +0000	[diff] [blame]	1779
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1780	<ul>
Reid Spencer	05fe4b0	2006-03-14 05:39:39 +0000	[diff] [blame]	1781	<li><a href="http://llvm.org/">LLVM homepage</a></li>
				1782	<li><a href="http://llvm.org/doxygen/">LLVM doxygen tree</a></li>
				1783	<li><a href="http://llvm.org/docs/Projects.html">Starting a Project
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1784	that Uses LLVM</a></li>
				1785	</ul>
				1786
				1787	</div>
				1788
				1789	<!-- *********************************************************************** -->
				1790
				1791	<hr>
Misha Brukman	142207b	2003-11-22 01:30:01 +0000	[diff] [blame]	1792	<address>
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1793	<a href="http://jigsaw.w3.org/css-validator/check/referer"><img
Misha Brukman	4440870	2008-12-11 17:34:48 +0000	[diff] [blame]	1794	src="http://jigsaw.w3.org/css-validator/images/vcss-blue" alt="Valid CSS"></a>
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1795	<a href="http://validator.w3.org/check/referer"><img
Misha Brukman	f00ddb0	2008-12-11 18:23:24 +0000	[diff] [blame]	1796	src="http://www.w3.org/Icons/valid-html401-blue" alt="Valid HTML 4.01"></a>
Misha Brukman	54111c4	2004-01-20 00:20:17 +0000	[diff] [blame]	1797
Misha Brukman	142207b	2003-11-22 01:30:01 +0000	[diff] [blame]	1798	<a href="mailto:sabre@nondot.org">Chris Lattner</a><br>
Reid Spencer	77d9019	2004-09-05 20:50:22 +0000	[diff] [blame]	1799	<a href="http://llvm.x10sys.com/rspencer/">Reid Spencer</a><br>
NAKAMURA Takumi	b9a3363	2011-04-09 02:13:37 +0000	[diff] [blame]	1800	<a href="http://llvm.org/">The LLVM Compiler Infrastructure</a><br>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1801	Last modified: $Date$
Misha Brukman	142207b	2003-11-22 01:30:01 +0000	[diff] [blame]	1802	</address>
Misha Brukman	00c73d2	2003-11-07 19:43:14 +0000	[diff] [blame]	1803	</body>
Guochun Shi	f4688a8	2002-07-17 23:05:56 +0000	[diff] [blame]	1804	</html>