"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Getting Started with LLVM System</title>
<link rel="stylesheet" href="llvm.css" type="text/css">
</head>
<li><a href="#layout">Program layout</a>
<ol>
<li><a href="#cvsdir"><tt>CVS</tt> directories</a>
+ <li><a href="#examples"><tt>llvm/examples</tt></a>
<li><a href="#include"><tt>llvm/include</tt></a>
<li><a href="#lib"><tt>llvm/lib</tt></a>
+ <li><a href="#projects"><tt>llvm/projects</tt></a>
<li><a href="#runtime"><tt>llvm/runtime</tt></a>
<li><a href="#test"><tt>llvm/test</tt></a>
+ <li><a href="#llvmtest"><tt>llvm-test</tt></a>
<li><a href="#tools"><tt>llvm/tools</tt></a>
<li><a href="#utils"><tt>llvm/utils</tt></a>
+ <li><a href="#win32"><tt>llvm/win32</tt></a>
</ol></li>
<li><a href="#tutorial">An Example Using the LLVM Tool Chain</a>
compiled into LLVM bytecode, a program can be manipulated with the LLVM tools
from the LLVM suite.</p>
+<p>
+There is a third, optional piece called llvm-test. It is a suite of programs
+with a testing harness that can be used to further test LLVM's functionality
+and performance.
+</p>
+
</div>
<!-- *********************************************************************** -->
<p>Here's the short story for getting up and running quickly with LLVM:</p>
<ol>
- <li>Install the GCC front end:
+ <li>Read the documentation.</li>
+ <li>Read the documentation.</li>
+ <li>Remember that you were warned twice about reading the documentation.</li>
+ <li>Install the GCC front end if you intend to compile C or C++:
<ol>
- <li><tt>cd <i>where-you-want-the-C-front-end-to-live</i></tt>
+ <li><tt>cd <i>where-you-want-the-C-front-end-to-live</i></tt></li>
<li><tt>gunzip --stdout cfrontend.<i>platform</i>.tar.gz | tar -xvf -</tt>
- <li><b>Sparc and MacOS X Only:</b><br>
- <tt>cd cfrontend/<i>platform</i><br>
- ./fixheaders</tt>
+ </li>
+ <li><tt>cd cfrontend/<i>platform</i><br>
+ ./fixheaders</tt></li>
+ <li>Add the cfrontend's "bin" directory to your PATH variable</li>
</ol></li>
- <li>Get the Source Code
+ <li>Get the LLVM Source Code
<ul>
- <li>With the distributed files:
+ <li>With the distributed files (or use <a href="#checkout">CVS</a>):
<ol>
<li><tt>cd <i>where-you-want-llvm-to-live</i></tt>
<li><tt>gunzip --stdout llvm-<i>version</i>.tar.gz | tar -xvf -</tt>
- <li><tt>cd llvm</tt>
</ol></li>
- <li>With anonymous CVS access (or use a <a href="#mirror">mirror</a>):
+ </ul></li>
+
+ <li><b>[Optional]</b> Get the Test Suite Source Code
+ <ul>
+ <li>With the distributed files (or use <a href="#checkout">CVS</a>):
<ol>
- <li><tt>cd <i>where-you-want-llvm-to-live</i></tt></li>
- <li><tt>cvs -d
- :pserver:anon@llvm-cvs.cs.uiuc.edu:/var/cvs/llvm login</tt></li>
- <li>Hit the return key when prompted for the password.
- <li><tt>cvs -z3 -d :pserver:anon@llvm-cvs.cs.uiuc.edu:/var/cvs/llvm
- co llvm</tt></li>
- <li><tt>cd llvm</tt></li>
+ <li><tt>cd <i>where-you-want-llvm-to-live</i></tt>
+ <li><tt>cd llvm/projects</tt>
+ <li><tt>gunzip --stdout llvm-test-<i>version</i>.tar.gz | tar -xvf -</tt>
</ol></li>
+
</ul></li>
+
<li>Configure the LLVM Build Environment
<ol>
- <li>Change directory to where you want to store the LLVM object
- files and run <tt>configure</tt> to configure the Makefiles and
- header files for the default platform. Useful options include:
+ <li><tt>cd <i>where-you-want-to-build-llvm</i></tt></li>
+ <li><tt><i>/path/to/llvm/</i>configure [options]</tt><br>
+ Some common options:
+
<ul>
+ <li><tt>--prefix=<i>directory</i></tt>
+ <p>Specify for <i>directory</i> the full pathname of where you
+ want the LLVM tools and libraries to be installed (default
+ <tt>/usr/local</tt>).</p></li>
<li><tt>--with-llvmgccdir=<i>directory</i></tt>
- <p>Specify the full pathname of where the LLVM GCC frontend is
- installed.</p></li>
+ <p>Optionally, specify for <i>directory</i> the full pathname of the
+ C/C++ FrontEnd installation to use with this LLVM configuration. If
+ not specified, the PATH will be searched.</p></li>
<li><tt>--enable-spec2000=<i>directory</i></tt>
<p>Enable the SPEC2000 benchmarks for testing. The SPEC2000
benchmarks should be available in
<li>Build the LLVM Suite:
<ol>
- <li>Set your LLVM_LIB_SEARCH_PATH environment variable.</li>
<li><tt>gmake -k |& tee gnumake.out
# this is csh or tcsh syntax</tt></li>
<li>If you get an "internal compiler error (ICE)" see <a href="#brokengcc">below</a>.</li>
<p>LLVM is known to work on the following platforms:</p>
-<ul>
-
- <li>Linux on x86 (Pentium and above)
- <ul>
- <li>Approximately 1.02 GB of Free Disk Space
- <ul>
- <li>Source code: 45 MB</li>
- <li>Object code: 956 MB</li>
- <li>GCC front end: 40 MB</li>
- </ul></li>
- </ul>
- </li>
-
- <li>Solaris on SparcV9 (Ultrasparc)
- <ul>
- <li>Approximately 1.75 GB of Free Disk Space
- <ul>
- <li>Source code: 45 MB</li>
- <li>Object code: 1.7 GB</li>
- <li>GCC front end: 50 MB</li>
- </ul></li>
- </ul>
- </li>
+<table cellpadding="3">
+<tr>
+ <th>OS</th>
+ <th>Arch</th>
+ <th>Compilers</th>
+</tr>
+<tr>
+ <td>Linux</td>
+ <td>x86<sup><a href="#pf_1">1</a></sup></td>
+ <td>GCC</td>
+</tr>
+<tr>
+ <td>Solaris</td>
+ <td>V9 (Ultrasparc)</td>
+ <td>GCC</td>
+</tr>
+<tr>
+ <td>FreeBSD</td>
+ <td>x86<sup><a href="#pf_1">1</a></sup></td>
+ <td>GCC</td>
+</tr>
+<tr>
+ <td>MacOS X<sup><a href="#pf_2">2</a></sup></td>
+ <td>PowerPC</td>
+ <td>GCC</td>
+</tr>
+<tr>
+ <td>Cygwin/Win32</td>
+ <td>x86<sup><a href="#pf_1">1</a></sup></td>
+ <td>GCC 3.4.X, binutils 2.15</td>
+</tr>
+<tr>
+ <td>MinGW/Win32</td>
+ <td>x86<sup><a href="#pf_1">1</a>,<a href="#pf_6">6</a></sup></td>
+ <td>GCC 3.4.X, binutils 2.15</td>
+</tr>
+<tr>
+ <td>Linux</td>
+ <td>amd64<sup><a href="#pf_3">3</a></sup></td>
+ <td>GCC</td>
+</tr>
+</table>
- <li>FreeBSD on x86 (Pentium and above)
- <ul>
- <li>Approximately 935 MB of Free Disk Space
- <ul>
- <li>Source code: 45 MB</li>
- <li>Object code: 850 MB</li>
- <li>GCC front end: 40 MB</li>
- </ul></li>
- </ul>
- </li>
+<p>LLVM has partial support for the following platforms:</p>
+
+<table>
+<tr>
+ <th>OS</th>
+ <th>Arch</th>
+ <th>Compilers</th>
+</tr>
+<tr>
+ <td>Windows</td>
+ <td>x86<sup><a href="#pf_1">1</a></sup></td>
+ <td>Visual Studio .NET<sup><a href="#pf_4">4</a>,<a href="#pf_5">5</a></sup></td>
+<tr>
+ <td>AIX<sup><a href="#pf_3">3</a>,<a href="#pf_4">4</a></sup></td>
+ <td>PowerPC</td>
+ <td>GCC</td>
+</tr>
+<tr>
+ <td>Linux<sup><a href="#pf_3">3</a>,<a href="#pf_5">5</a></sup></td>
+ <td>PowerPC</td>
+ <td>GCC</td>
+</tr>
+</table>
- <li>MacOS X on PowerPC
- <ul>
- <li>Approximately 1.25 GB of Free Disk Space
- <ul>
- <li>Source code: 45 MB</li>
- <li>Object code: 1.2 GB</li>
- <li>GCC front end: 40 MB</li>
- </ul></li>
- </ul>
- </li>
+<p><b>Notes:</b></p>
- <li>AIX on PowerPC
- <ul>
- <li><div class="doc_warning">No native code generation</div>
- <li>Approximately 2 GB of Free Disk Space
- <ul>
- <li>Source code: 92 MB</li>
- <li>Object code: 2.8 GB</li>
- <li>GCC front end: 123 MB</li>
- </ul></li>
- </ul>
- </li>
+<div class="doc_notes">
+<ol>
+<li><a name="pf_1">Code generation supported for Pentium processors and
+up</a></li>
+<li><a name="pf_2">Code generation supported for 32-bit ABI only</a></li>
+<li><a name="pf_3">No native code generation</a></li>
+<li><a name="pf_4">Build is not complete: one or more tools don't link</a></li>
+<li><a name="pf_5">The GCC-based C/C++ frontend does not build</a></li>
+<li><a name="pf_6">The port is done using the MSYS shell.
+<a href="http://www.mingw.org/MinGWiki/">Download</a> and install
+bison (excl. M4.exe) and flex in that order. Build binutils-2.15 from source,
+if necessary.</li>
+</ol>
+</div>
-</ul>
+<p>Note that you will need about 1-3 GB of space for a full LLVM build in Debug
+mode, depending on the system (because of all the debug info), and the libraries
+appear in more than one of the tools that get linked, so there is some
+duplication. If you do not need many of the tools and you are space-conscious,
+you can disable them individually in <tt>llvm/tools/Makefile</tt>. The Release
+build requires considerably less space.</p>
<p>The LLVM suite <i>may</i> compile on other platforms, but it is not
guaranteed to do so. If compilation is successful, the LLVM utilities should be
</div>
<!-- ======================================================================= -->
-<div class="doc_subsection">
- <a name="software"><b>Software</b></a>
-</div>
-
+<div class="doc_subsection"><a name="software"><b>Software</b></a></div>
<div class="doc_text">
-
-<p>Compiling LLVM requires that you have several software packages
-installed:</p>
-
-<ul>
- <li><a href="http://gcc.gnu.org">GCC 3.x with C and C++ language
- support</a> (See <a href="#brokengcc">below</a> for specific version info)</li>
-
- <li><a href="http://savannah.gnu.org/projects/make">GNU Make</a></li>
-
- <li><a href="http://www.gnu.org/software/flex">Flex</a></li>
-
- <li><a href="http://www.gnu.org/software/bison/bison.html">Bison</a></li>
-</ul>
-
-<p>There are some additional tools that you may want to have when working with
-LLVM:</p>
-
-<ul>
- <li><A href="http://www.gnu.org/software/automake">GNU Automake</A></li>
- <li><A href="http://www.gnu.org/software/autoconf">GNU Autoconf</A></li>
- <li><A href="http://savannah.gnu.org/projects/m4">GNU M4</A>
-
- <p>If you want to make changes to the configure scripts, you will need GNU
- autoconf (2.57 or higher), and consequently, GNU M4 (version 1.4 or
- higher). You will also need automake. Any old version of
- automake from 1.4p5 on should work; we only use aclocal from that
- package.</p></li>
-
- <li><A href="http://www.codesourcery.com/qm/qmtest">QMTest 2.0.3</A></li>
- <li><A href="http://www.python.org">Python</A>
-
- <p>
- These are needed to use the LLVM test suite. Please note that newer
- versions of QMTest may not work with the LLVM test suite. QMTest 2.0.3
- can be retrieved from the QMTest CVS repository using the following
- commands:</p>
- <ul>
- <li><tt>cvs -d :pserver:anoncvs@cvs.codesourcery.com:/home/qm/Repository login</tt>
- </li>
- <li>When prompted, use <tt>anoncvs</tt> as the password.
- </li>
- <li><tt>cvs -d :pserver:anoncvs@cvs.codesourcery.com:/home/qm/Repository co -r release-2-0-3 qm</tt>
- </li>
- </ul>
- </li>
-
-</ul>
+ <p>Compiling LLVM requires that you have several software packages
+ installed. The table below lists those required packages. The Package column
+ is the usual name for the software package that LLVM depends on. The Version
+ column provides "known to work" versions of the package. The Notes column
+ describes how LLVM uses the package and provides other details.</p>
+ <table>
+ <tr><th>Package</th><th>Version</th><th>Notes</th></tr>
+
+ <tr>
+ <td><a href="http://savannah.gnu.org/projects/make">GNU Make</a></td>
+ <td>3.79, 3.79.1</td>
+ <td>Makefile/build processor</td>
+ </tr>
+
+ <tr>
+ <td><a href="http://gcc.gnu.org">GCC</a></td>
+ <td>3.4.2</td>
+ <td>C/C++ compiler<sup><a href="#sf1">1</a></sup></td>
+ </tr>
+
+ <tr>
+ <td><a href="http://www.gnu.org/software/flex">Flex</a></td>
+ <td>2.5.4</td>
+ <td>LEX compiler</td>
+ </tr>
+
+ <tr>
+ <td><a href="http://www.gnu.org/software/bison/bison.html">Bison</a></td>
+ <td>1.35</td>
+ <td>YACC compiler</td>
+ </tr>
+
+ <tr>
+ <td><a href="https://www.cvshome.org/downloads.html">CVS</a></td>
+ <td>≥1.11</td>
+ <td>CVS access to LLVM<sup><a href="#sf2">2</a></sup></td>
+ </tr>
+
+ <tr>
+ <td><a href="http://savannah.gnu.org/projects/dejagnu">DejaGnu</a></td>
+ <td>1.4.2</td>
+ <td>Automated test suite<sup><a href="#sf3">3</a></sup></td>
+ </tr>
+
+ <tr>
+ <td><a href="http://www.tcl.tk/software/tcltk/">tcl</a></td>
+ <td>8.3, 8.4</td>
+ <td>Automated test suite<sup><a href="#sf3">3</a></sup></td>
+ </tr>
+
+ <tr>
+ <td><a href="http://expect.nist.gov/">expect</a></td>
+ <td>5.38.0</td>
+ <td>Automated test suite<sup><a href="#sf3">3</a></sup></td>
+ </tr>
+
+ <tr>
+ <td><a href="http://www.perl.com/download.csp">perl</a></td>
+ <td>≥5.6.0</td>
+ <td>Nightly tester, utilities</td>
+ </tr>
+
+ <tr>
+ <td><a href="http://savannah.gnu.org/projects/m4">GNU M4</a>
+ <td>1.4</td>
+ <td>Macro processor for configuration<sup><a href="#sf4">4</a></sup></td>
+ </tr>
+
+ <tr>
+ <td><a href="http://www.gnu.org/software/autoconf">GNU Autoconf</a></td>
+ <td>2.59</td>
+ <td>Configuration script builder<sup><a href="#sf4">4</a></sup></td>
+ </tr>
+
+ <tr>
+ <td><a href="http://www.gnu.org/software/automake">GNU Automake</a></td>
+ <td>1.9.2</td>
+ <td>aclocal macro generator<sup><a href="#sf4">4</a></sup></td>
+ </tr>
+
+ <tr>
+ <td><a href="http://savannah.gnu.org/projects/libtool">libtool</a></td>
+ <td>1.5.10</td>
+ <td>Shared library manager<sup><a href="#sf4">4</a></sup></td>
+ </tr>
+
+ </table>
+
+ <p><b>Notes:</b></p>
+ <div class="doc_notes">
+ <ol>
+ <li><a name="sf3">Only the C and C++ languages are needed so there's no
+ need to build the other languages for LLVM's purposes.</a> See
+ <a href="#brokengcc">below</a> for specific version info.</li>
+ <li><a name="sf2">You only need CVS if you intend to build from the
+ latest LLVM sources. If you're working from a release distribution, you
+ don't need CVS.</a></li>
+ <li><a name="sf3">Only needed if you want to run the automated test
+ suite in the <tt>llvm/test</tt> directory.</a></li>
+ <li><a name="sf4">If you want to make changes to the configure scripts,
+ you will need GNU autoconf (2.59), and consequently, GNU M4 (version 1.4
+ or higher). You will also need automake (1.9.2). We only use aclocal
+ from that package.</a></li>
+ </ol>
+ </div>
+
+ <p>Additionally, your compilation host is expected to have the usual
+ plethora of Unix utilities. Specifically:</p>
+ <ul>
+ <li><b>ar</b> - archive library builder</li>
+ <li><b>bzip2*</b> - bzip2 command for distribution generation</li>
+ <li><b>bunzip2*</b> - bunzip2 command for distribution checking</li>
+ <li><b>chmod</b> - change permissions on a file</li>
+ <li><b>cat</b> - output concatenation utility</li>
+ <li><b>cp</b> - copy files</li>
+ <li><b>date</b> - print the current date/time </li>
+ <li><b>echo</b> - print to standard output</li>
+ <li><b>egrep</b> - extended regular expression search utility</li>
+ <li><b>etags</b> - C/C++ tag file creator for vim/emacs</li>
+ <li><b>find</b> - find files/dirs in a file system</li>
+ <li><b>grep</b> - regular expression search utility</li>
+ <li><b>gzip*</b> - gzip command for distribution generation</li>
+ <li><b>gunzip*</b> - gunzip command for distribution checking</li>
+ <li><b>install</b> - install directories/files </li>
+ <li><b>mkdir</b> - create a directory</li>
+ <li><b>mv</b> - move (rename) files</li>
+ <li><b>ranlib</b> - symbol table builder for archive libraries</li>
+ <li><b>rm</b> - remove (delete) files and directories</li>
+ <li><b>sed</b> - stream editor for transforming output</li>
+ <li><b>sh</b> - Bourne shell for make build scripts</li>
+ <li><b>tar</b> - tape archive for distribution generation</li>
+ <li><b>test</b> - test things in file system</li>
+ <li><b>unzip*</b> - unzip command for distribution checking</li>
+ <li><b>zip*</b> - zip command for distribution generation</li>
+ </ul>
</div>
<!-- ======================================================================= -->
problems in the STL that effectively prevent it from compiling LLVM.
</p>
+<p><b>GCC 3.2.2</b>: This version of GCC fails to compile LLVM.</p>
+
<p><b>GCC 3.3.2</b>: This version of GCC suffered from a <a
href="http://gcc.gnu.org/PR13392">serious bug</a> which causes it to crash in
the "<tt>convert_from_eh_region_ranges_1</tt>" GCC function.</p>
-
</div>
<dt>LLVMGCCDIR
<dd>
- This is the where the LLVM GCC Front End is installed.
+ This is where the LLVM GCC Front End is installed.
<p>
For the pre-built GCC front end binaries, the LLVMGCCDIR is
<tt>cfrontend/<i>platform</i>/llvm-gcc</tt>.
<div class="doc_text">
<p>
-In order to compile and use LLVM, you will need to set some environment
-variables. There are also some shell aliases which you may find useful.
-You can set these on the command line, or better yet, set them in your
-<tt>.cshrc</tt> or <tt>.profile</tt>.
+In order to compile and use LLVM, you may need to set some environment
+variables.
<dl>
- <dt><tt>LLVM_LIB_SEARCH_PATH</tt>=<tt><i>LLVMGCCDIR</i>/bytecode-libs</tt>
- <dd>
- This environment variable helps the LLVM GCC front end find bytecode
- libraries that it will need for compilation.
- <p>
-
- <dt>alias llvmgcc <i>LLVMGCCDIR</i><tt>/bin/gcc</tt>
- <dt>alias llvmg++ <i>LLVMGCCDIR</i><tt>/bin/g++</tt>
- <dd>
- This alias allows you to use the LLVM C and C++ front ends without putting
- them in your <tt>PATH</tt> or typing in their complete pathnames.
+ <dt><tt>LLVM_LIB_SEARCH_PATH</tt>=<tt>/path/to/your/bytecode/libs</tt></dt>
+ <dd>[Optional] This environment variable helps LLVM linking tools find the
+ locations of your bytecode libraries. It is provided only a
+ convenience since you can specify the paths using the -L options of the
+ tools and the C/C++ front-end will use the bytecode files installed in its
+ <tt>lib</tt> directory.</dd>
</dl>
</div>
<p>
If you have the LLVM distribution, you will need to unpack it before you
can begin to compile it. LLVM is distributed as a set of two files: the LLVM
-suite and the LLVM GCC front end compiled for your platform. Each
-file is a TAR archive that is compressed with the gzip program.
+suite and the LLVM GCC front end compiled for your platform. There is an
+additional test suite that is optional. Each file is a TAR archive that is
+compressed with the gzip program.
</p>
-<p> The files are as follows:
+<p>The files are as follows, with <em>x.y</em> marking the version number:
<dl>
- <dt>llvm-1.2.tar.gz
- <dd>This is the source code to the LLVM suite.
- <p>
+ <dt><tt>llvm-x.y.tar.gz</tt></dt>
+ <dd>Source release for the LLVM libraries and tools.<br/></dd>
- <dt>cfrontend-1.2.sparc-sun-solaris2.8.tar.gz
- <dd>This is the binary release of the GCC front end for Solaris/Sparc.
- <p>
+ <dt><tt>llvm-test-x.y.tar.gz</tt></dt>
+ <dd>Source release for the LLVM test suite.</dd>
- <dt>cfrontend-1.2.i686-redhat-linux-gnu.tar.gz
- <dd>This is the binary release of the GCC front end for Linux/x86.
- <p>
+ <dt><tt>cfrontend-x.y.source.tar.gz</tt></dt>
+ <dd>Source release of the GCC front end.<br/></dd>
- <dt>cfrontend-1.2.i386-unknown-freebsd5.1.tar.gz
- <dd>This is the binary release of the GCC front end for FreeBSD/x86.
- <p>
+ <dt><tt>cfrontend-x.y.sparc-sun-solaris2.8.tar.gz</tt></dt>
+ <dd>Binary release of the GCC front end for Solaris/Sparc.
+ <br/></dd>
+
+ <dt><tt>cfrontend-x.y.i686-redhat-linux-gnu.tar.gz</tt></dt>
+ <dd>Binary release of the GCC front end for Linux/x86.<br/></dd>
- <dt>cfrontend-1.2.powerpc-apple-darwin7.0.0.tar.gz
- <dd>This is the binary release of the GCC front end for MacOS X/PPC.
+ <dt><tt>cfrontend-x.y.i386-unknown-freebsd5.1.tar.gz</tt></dt>
+ <dd>Binary release of the GCC front end for FreeBSD/x86.<br/></dd>
+
+ <dt><tt>cfrontend-x.y.powerpc-apple-darwin7.6.0.tar.gz</tt></dt>
+ <dd>Binary release of the GCC front end for MacOS X/PPC.<br/></dd>
</dl>
</div>
<p>If you want to get a specific release (as opposed to the most recent
revision), you can specify a label. The following releases have the following
-label:</p>
+labels:</p>
<ul>
+<li>Release 1.4: <b>RELEASE_14</b></li>
+<li>Release 1.3: <b>RELEASE_13</b></li>
<li>Release 1.2: <b>RELEASE_12</b></li>
<li>Release 1.1: <b>RELEASE_11</b></li>
<li>Release 1.0: <b>RELEASE_1</b></li>
</ul>
+<p>If you would like to get the LLVM test suite (a separate package as of 1.4),
+you get it from the CVS repository:</p>
+<pre>
+ cd llvm/projects
+ cvs -z3 -d :pserver:anon@llvm-cvs.cs.uiuc.edu:/var/cvs/llvm co llvm-test
+</pre>
+<p>By placing it in the <tt>llvm/projects</tt>, it will be automatically
+configured by the LLVM configure script as well as automatically updated when
+you run <tt>cvs update</tt>.</p>
+
<p>If you would like to get the GCC front end source code, you can also get it
from the CVS repository:</p>
</pre>
<p>Please note that you must follow <a href="CFEBuildInstrs.html">these
-instructions</a> to successfully build the LLVM C front-end.</p>
+instructions</a> to successfully build the LLVM GCC front-end.</p>
</div>
-</tt></li>
</ol>
-<p>If you are using Solaris/Sparc or MacOS X/PPC, you will need to fix the
-header files:</p>
+<p>Next, you will need to fix your system header files:</p>
<p><tt>cd cfrontend/<i>platform</i><br>
./fixheaders</tt></p>
<div class="doc_text">
<p>Once checked out from the CVS repository, the LLVM suite source code must be
-configured via the <tt>configure</tt> script. This script sets variables in
-<tt>llvm/Makefile.config</tt> and <tt>llvm/include/Config/config.h</tt>. It
-also populates <i>OBJ_ROOT</i> with the Makefiles needed to begin building
-LLVM.</p>
+configured via the <tt>configure</tt> script. This script sets variables in the
+various <tt>*.in</tt> files, most notably <tt>llvm/Makefile.config</tt> and
+<tt>llvm/include/Config/config.h</tt>. It also populates <i>OBJ_ROOT</i> with
+the Makefiles needed to begin building LLVM.</p>
<p>The following environment variables are used by the <tt>configure</tt>
script to configure the build system:</p>
-<table border=1>
- <tr>
- <th>Variable</th>
- <th>Purpose</th>
- </tr>
-
+<table>
+ <tr><th>Variable</th><th>Purpose</th></tr>
<tr>
<td>CC</td>
<td>Tells <tt>configure</tt> which C compiler to use. By default,
<tt>PATH</tt>. Use this variable to override
<tt>configure</tt>'s default behavior.</td>
</tr>
-
<tr>
<td>CXX</td>
<td>Tells <tt>configure</tt> which C++ compiler to use. By default,
<p>The following options can be used to set or enable LLVM specific options:</p>
<dl>
- <dt><i>--with-llvmgccdir=LLVMGCCDIR</i>
- <dd>
- Path to the location where the LLVM GCC front end binaries and
- associated libraries were installed. This must be specified as an
- absolute pathname.
- <p>
- <dt><i>--enable-optimized</i>
+ <dt><i>--with-llvmgccdir</i></dt>
+ <dd>Path to the LLVM C/C++ FrontEnd to be used with this LLVM configuration.
+ The value of this option should specify the full pathname of the C/C++ Front
+ End to be used. If this option is not provided, the PATH will be searched for
+ a program named <i>llvm-gcc</i> and the C/C++ FrontEnd install directory will
+ be inferred from the path found. If the option is not given, and no llvm-gcc
+ can be found in the path then a warning will be produced by
+ <tt>configure</tt> indicating this situation. LLVM may still be built with
+ the <tt>tools-only</tt> target but attempting to build the runtime libraries
+ will fail as these libraries require llvm-gcc and llvm-g++. See
+ <a href="#installcf">Install the GCC Front End</a> for details on installing
+ the C/C++ Front End. See
+ <a href="CFEBuildInstrs.html">Bootstrapping the LLVM C/C++ Front-End</a>
+ for details on building the C/C++ Front End.</dd>
+ <dt><i>--with-tclinclude</i></dt>
+ <dd>Path to the tcl include directory under which the <tt>tclsh</tt> can be
+ found. Use this if you have multiple tcl installations on your machine and you
+ want to use a specific one (8.x) for LLVM. LLVM only uses tcl for running the
+ dejagnu based test suite in <tt>llvm/test</tt>. If you don't specify this
+ option, the LLVM configure script will search for tcl 8.4 and 8.3 releases.
+ <p></p>
+ </dd>
+ <dt><i>--enable-optimized</i></dt>
<dd>
Enables optimized compilation by default (debugging symbols are removed
and GCC optimization flags are enabled). The default is to use an
unoptimized build (also known as a debug build).
- <p>
- <dt><i>--enable-jit</i>
+ <p></p>
+ </dd>
+ <dt><i>--enable-jit</i></dt>
<dd>
Compile the Just In Time (JIT) compiler functionality. This is not
available
on all platforms. The default is dependent on platform, so it is best
to explicitly enable it if you want it.
- <p>
- <dt><i>--enable-spec2000</i>
- <dt><i>--enable-spec2000=<<tt>directory</tt>></i>
- <dd>
- Enable the use of SPEC2000 when testing LLVM. This is disabled by default
- (unless <tt>configure</tt> finds SPEC2000 installed). By specifying
- <tt>directory</tt>, you can tell configure where to find the SPEC2000
- benchmarks. If <tt>directory</tt> is left unspecified, <tt>configure</tt>
- uses the default value
- <tt>/home/vadve/shared/benchmarks/speccpu2000/benchspec</tt>.
- <p>
- <dt><i>--enable-spec95</i>
- <dt><i>--enable-spec95=<<tt>directory</tt>></i>
- <dd>
- Enable the use of SPEC95 when testing LLVM. It is similar to the
- <i>--enable-spec2000</i> option.
- <p>
- <dt><i>--enable-povray</i>
- <dt><i>--enable-povray=<<tt>directory</tt>></i>
- <dd>
- Enable the use of Povray as an external test. Versions of Povray written
- in C should work. This option is similar to the <i>--enable-spec2000</i>
- option.
+ <p></p>
+ </dd>
+ <dt><i>--enable-doxygen</i></dt>
+ <dd>Look for the doxygen program and enable construction of doxygen based
+ documentation from the source code. This is disabled by default because
+ generating the documentation can take a long time and producess 100s of
+ megabytes of output.</dd>
</dl>
<p>To configure LLVM, follow these steps:</p>
<li>Run the <tt>configure</tt> script located in the LLVM source tree:
<br>
- <tt><i>SRC_ROOT</i>/configure</tt>
+ <tt><i>SRC_ROOT</i>/configure --prefix=/install/path [other options]</tt>
<p>
</ol>
-<p>In addition to running <tt>configure</tt>, you must set the
-<tt>LLVM_LIB_SEARCH_PATH</tt> environment variable in your startup scripts.
-This environment variable is used to locate "system" libraries like
-"<tt>-lc</tt>" and "<tt>-lm</tt>" when linking. This variable should be set to
-the absolute path of the <tt>bytecode-libs</tt> subdirectory of the GCC front
-end, or <i>LLVMGCCDIR</i>/<tt>bytecode-libs</tt>. For example, one might set
-<tt>LLVM_LIB_SEARCH_PATH</tt> to
-<tt>/home/vadve/lattner/local/x86/llvm-gcc/bytecode-libs</tt> for the x86
-version of the GCC front end on our research machines.</p>
-
</div>
<!-- ======================================================================= -->
<p><tt>gmake</tt></p>
<p>If the build fails, please <a href="#brokengcc">check here</a> to see if you
-are using a known broken version of GCC to compile LLVM with.</p>
+are using a version of GCC that is known not to compile LLVM.</p>
<p>
If you have multiple processors in your machine, you may wish to use some of
generated C/C++ files, libraries, and executables.
<p>
- <dt><tt>gmake distclean</tt>
+ <dt><tt>gmake dist-clean</tt>
<dd>
- Removes everything that <tt>gmake clean</tt> does, but also removes
- files generated by <tt>configure</tt>. It attempts to return the
- source tree to the original state in which it was shipped.
+ Removes everything that <tt>gmake clean</tt> does, but also removes files
+ generated by <tt>configure</tt>. It attempts to return the source tree to the
+ original state in which it was shipped.
<p>
<dt><tt>gmake install</tt>
<dd>
- Installs LLVM files into the proper location. For the most part,
- this does nothing, but it does install bytecode libraries into the
- GCC front end's bytecode library directory. If you need to update
- your bytecode libraries, this is the target to use once you've built
- them.
+ Installs LLVM header files, libraries, tools, and documentation in a
+ hierarchy
+ under $PREFIX, specified with <tt>./configure --prefix=[dir]</tt>, which
+ defaults to <tt>/usr/local</tt>.
+ <p>
+
+ <dt><tt>gmake -C runtime install-bytecode</tt>
+ <dd>
+ Assuming you built LLVM into $OBJDIR, when this command is run, it will
+ install bytecode libraries into the GCC front end's bytecode library
+ directory. If you need to update your bytecode libraries,
+ this is the target to use once you've built them.
<p>
</dl>
+<p>Please see the <a href="MakefileGuide.html">Makefile Guide</a> for further
+details on these <tt>make</tt> targets and descriptions of other targets
+available.</p>
+
<p>It is also possible to override default values from <tt>configure</tt> by
declaring variables on the command line. The following are some examples:</p>
<dd>
Print what <tt>gmake</tt> is doing on standard output.
<p>
+
+ <dt><tt>gmake TOOL_VERBOSE=1</tt></dt>
+ <dd>Ask each tool invoked by the makefiles to print out what it is doing on
+ the standard output. This also implies <tt>VERBOSE=1</tt>.
+ <p></dd>
</dl>
<p>Every directory in the LLVM object tree includes a <tt>Makefile</tt> to build
<dd>
<dl>
<dt>Tools
- <dd><tt><i>OBJ_ROOT</i>/tools/Debug</tt>
+ <dd><tt><i>OBJ_ROOT</i>/Debug/bin</tt>
<dt>Libraries
- <dd><tt><i>OBJ_ROOT</i>/lib/Debug</tt>
+ <dd><tt><i>OBJ_ROOT</i>/Debug/lib</tt>
</dl>
<p>
<dd>
<dl>
<dt>Tools
- <dd><tt><i>OBJ_ROOT</i>/tools/Release</tt>
+ <dd><tt><i>OBJ_ROOT</i>/Release/bin</tt>
<dt>Libraries
- <dd><tt><i>OBJ_ROOT</i>/lib/Release</tt>
+ <dd><tt><i>OBJ_ROOT</i>/Release/lib</tt>
</dl>
<p>
<dd>
<dl>
<dt>Tools
- <dd><tt><i>OBJ_ROOT</i>/tools/Profile</tt>
+ <dd><tt><i>OBJ_ROOT</i>/Profile/bin</tt>
<dt>Libraries
- <dd><tt><i>OBJ_ROOT</i>/lib/Profile</tt>
+ <dd><tt><i>OBJ_ROOT</i>/Profile/lib</tt>
</dl>
</dl>
<div class="doc_text">
<p>
-If you're running on a linux system that supports the "<a
-href="http://www.tat.physik.uni-tuebingen.de/~rguenth/linux/binfmt_misc.html">binfmt_misc</a>"
+If you're running on a Linux system that supports the "<a
+ href="http://www.tat.physik.uni-tuebingen.de/~rguenth/linux/binfmt_misc.html">
+ binfmt_misc</a>"
module, and you have root access on the system, you can set your system up to
execute LLVM bytecode files directly. To do this, use commands like this (the
first command may not be required if you are already using the module):</p>
+<div class="doc_code">
<pre>
$ mount -t binfmt_misc none /proc/sys/fs/binfmt_misc
- $ echo ':llvm:M::llvm::/path/to/lli:' > /proc/sys/fs/binfmt_misc/register
+ $ echo ':llvm:M::llvm::/path/to/lli:' > /proc/sys/fs/binfmt_misc/register
$ chmod u+x hello.bc (if needed)
$ ./hello.bc
</pre>
+</div>
<p>
This allows you to execute LLVM bytecode files directly. Thanks to Jack
</div>
<!-- ======================================================================= -->
-<div class="doc_subsection">
- <a name="cvsdir"><tt>CVS</tt> directories</a>
-</div>
-
+<div class="doc_subsection"><a name="cvsdir"><tt>CVS</tt> directories</a></div>
<div class="doc_text">
-
<p>Every directory checked out of CVS will contain a <tt>CVS</tt> directory; for
the most part these can just be ignored.</p>
-
</div>
<!-- ======================================================================= -->
-<div class="doc_subsection">
- <a name="include"><tt>llvm/include</tt></a>
+<div class="doc_subsection"><a name="examples"><tt>llvm/examples</tt></a></div>
+<div class="doc_text">
+ <p>This directory contains some simple examples of how to use the LLVM IR and
+ JIT.</p>
</div>
+<!-- ======================================================================= -->
+<div class="doc_subsection"><a name="include"><tt>llvm/include</tt></a></div>
<div class="doc_text">
<p>This directory contains public header files exported from the LLVM
library. The three main subdirectories of this directory are:</p>
-<ol>
- <li><tt>llvm/include/llvm</tt> - This directory contains all of the LLVM
- specific header files. This directory also has subdirectories for
- different portions of LLVM: <tt>Analysis</tt>, <tt>CodeGen</tt>,
- <tt>Target</tt>, <tt>Transforms</tt>, etc...</li>
-
- <li><tt>llvm/include/Support</tt> - This directory contains generic
- support libraries that are independent of LLVM, but are used by LLVM.
- For example, some C++ STL utilities and a Command Line option processing
- library store their header files here.</li>
-
- <li><tt>llvm/include/Config</tt> - This directory contains header files
- configured by the <tt>configure</tt> script. They wrap "standard" UNIX
- and C header files. Source code can include these header files which
- automatically take care of the conditional #includes that the
- <tt>configure</tt> script generates.</li>
-</ol>
-
+<dl>
+ <dt><tt><b>llvm/include/llvm</b></tt></dt>
+ <dd>This directory contains all of the LLVM specific header files. This
+ directory also has subdirectories for different portions of LLVM:
+ <tt>Analysis</tt>, <tt>CodeGen</tt>, <tt>Target</tt>, <tt>Transforms</tt>,
+ etc...</dd>
+
+ <dt><tt><b>llvm/include/llvm/Support</b></tt></dt>
+ <dd>This directory contains generic support libraries that are provided with
+ LLVM but not necessarily specific to LLVM. For example, some C++ STL utilities
+ and a Command Line option processing library store their header files here.
+ </dd>
+
+ <dt><tt><b>llvm/include/llvm/Config</b></tt></dt>
+ <dd>This directory contains header files configured by the <tt>configure</tt>
+ script. They wrap "standard" UNIX and C header files. Source code can
+ include these header files which automatically take care of the conditional
+ #includes that the <tt>configure</tt> script generates.</dd>
+</dl>
</div>
<!-- ======================================================================= -->
-<div class="doc_subsection">
- <a name="lib"><tt>llvm/lib</tt></a>
-</div>
-
+<div class="doc_subsection"><a name="lib"><tt>llvm/lib</tt></a></div>
<div class="doc_text">
<p>This directory contains most of the source files of the LLVM system. In LLVM,
different <a href="#tools">tools</a>.</p>
<dl>
- <dt><tt>llvm/lib/VMCore/</tt><dd> This directory holds the core LLVM
- source files that implement core classes like Instruction and BasicBlock.
-
- <dt><tt>llvm/lib/AsmParser/</tt><dd> This directory holds the source code
- for the LLVM assembly language parser library.
+ <dt><tt><b>llvm/lib/VMCore/</b></tt></dt>
+ <dd> This directory holds the core LLVM source files that implement core
+ classes like Instruction and BasicBlock.</dd>
- <dt><tt>llvm/lib/ByteCode/</tt><dd> This directory holds code for reading
- and write LLVM bytecode.
+ <dt><tt><b>llvm/lib/AsmParser/</b></tt></dt>
+ <dd>This directory holds the source code for the LLVM assembly language parser
+ library.</dd>
- <dt><tt>llvm/lib/CWriter/</tt><dd> This directory implements the LLVM to C
- converter.
+ <dt><tt><b>llvm/lib/ByteCode/</b></tt></dt>
+ <dd>This directory holds code for reading and write LLVM bytecode.</dd>
- <dt><tt>llvm/lib/Analysis/</tt><dd> This directory contains a variety of
+ <dt><tt><b>llvm/lib/Analysis/</b></tt><dd>This directory contains a variety of
different program analyses, such as Dominator Information, Call Graphs,
Induction Variables, Interval Identification, Natural Loop Identification,
- etc...
-
- <dt><tt>llvm/lib/Transforms/</tt><dd> This directory contains the source
- code for the LLVM to LLVM program transformations, such as Aggressive Dead
- Code Elimination, Sparse Conditional Constant Propagation, Inlining, Loop
- Invariant Code Motion, Dead Global Elimination, and many others...
-
- <dt><tt>llvm/lib/Target/</tt><dd> This directory contains files that
- describe various target architectures for code generation. For example,
- the llvm/lib/Target/SparcV9 directory holds the Sparc machine
- description.<br>
+ etc.</dd>
+
+ <dt><tt><b>llvm/lib/Transforms/</b></tt></dt>
+ <dd> This directory contains the source code for the LLVM to LLVM program
+ transformations, such as Aggressive Dead Code Elimination, Sparse Conditional
+ Constant Propagation, Inlining, Loop Invariant Code Motion, Dead Global
+ Elimination, and many others.</dd>
+
+ <dt><tt><b>llvm/lib/Target/</b></tt></dt>
+ <dd> This directory contains files that describe various target architectures
+ for code generation. For example, the <tt>llvm/lib/Target/SparcV9</tt>
+ directory holds the Sparc machine description while
+ <tt>llvm/lib/Target/CBackend</tt> implements the LLVM-to-C converter</dd>
- <dt><tt>llvm/lib/CodeGen/</tt><dd> This directory contains the major parts
- of the code generator: Instruction Selector, Instruction Scheduling, and
- Register Allocation.
-
- <dt><tt>llvm/lib/Support/</tt><dd> This directory contains the source code
- that corresponds to the header files located in
- <tt>llvm/include/Support/</tt>.
+ <dt><tt><b>llvm/lib/CodeGen/</b></tt></dt>
+ <dd> This directory contains the major parts of the code generator: Instruction
+ Selector, Instruction Scheduling, and Register Allocation.</dd>
+
+ <dt><tt><b>llvm/lib/Debugger/</b></tt></dt>
+ <dd> This directory contains the source level debugger library that makes
+ it possible to instrument LLVM programs so that a debugger could identify
+ source code locations at which the program is executing.</dd>
+
+ <dt><tt><b>llvm/lib/ExecutionEngine/</b></tt></dt>
+ <dd> This directory contains libraries for executing LLVM bytecode directly
+ at runtime in both interpreted and JIT compiled fashions.</dd>
+
+ <dt><tt><b>llvm/lib/Support/</b></tt></dt>
+ <dd> This directory contains the source code that corresponds to the header
+ files located in <tt>llvm/include/Support/</tt>.</dd>
+
+ <dt><tt><b>llvm/lib/System/</b></tt></dt>
+ <dd>This directory contains the operating system abstraction layer that
+ shields LLVM from platform-specific coding.</dd>
</dl>
</div>
<!-- ======================================================================= -->
-<div class="doc_subsection">
- <a name="runtime"><tt>llvm/runtime</tt></a>
+<div class="doc_subsection"><a name="projects"><tt>llvm/projects</tt></a></div>
+<div class="doc_text">
+ <p>This directory contains projects that are not strictly part of LLVM but are
+ shipped with LLVM. This is also the directory where you should create your own
+ LLVM-based projects. See <tt>llvm/projects/sample</tt> for an example of how
+ to set up your own project. See <tt>llvm/projects/Stacker</tt> for a fully
+ functional example of a compiler front end.</p>
</div>
+<!-- ======================================================================= -->
+<div class="doc_subsection"><a name="runtime"><tt>llvm/runtime</tt></a></div>
<div class="doc_text">
<p>This directory contains libraries which are compiled into LLVM bytecode and
</div>
<!-- ======================================================================= -->
-<div class="doc_subsection">
- <a name="test"><tt>llvm/test</tt></a>
-</div>
-
+<div class="doc_subsection"><a name="test"><tt>llvm/test</tt></a></div>
<div class="doc_text">
-
-<p>This directory contains regression tests and source code that is used to test
-the LLVM infrastructure.</p>
-
+ <p>This directory contains feature and regression tests and other basic sanity
+ checks on the LLVM infrastructure. These are intended to run quickly and cover
+ a lot of territory without being exhaustive.</p>
</div>
<!-- ======================================================================= -->
-<div class="doc_subsection">
- <a name="tools"><tt>llvm/tools</tt></a>
+<div class="doc_subsection"><a name="llvmtest"><tt>llvm-test</tt></a></div>
+<div class="doc_text">
+ <p>This is not a directory in the normal llvm module; it is a separate CVS
+ module that must be checked out (usually to <tt>projects/llvm-test</tt>). This
+ module contains a comprehensive correctness, performance, and benchmarking
+ test
+ suite for LLVM. It is a separate CVS module because not every LLVM user is
+ interested in downloading or building such a comprehensive test. For further
+ details on this test suite, please see the
+ <a href="TestingGuide.html">Testing Guide</a> document.</p>
</div>
+<!-- ======================================================================= -->
+<div class="doc_subsection"><a name="tools"><tt>llvm/tools</tt></a></div>
<div class="doc_text">
<p>The <b>tools</b> directory contains the executables built out of the
libraries above, which form the main part of the user interface. You can
always get help for a tool by typing <tt>tool_name --help</tt>. The
-following is a brief introduction to the most important tools:</p>
+following is a brief introduction to the most important tools. More detailed
+information is in the <a href="CommandGuide/index.html">Command Guide</a>.</p>
<dl>
- <dt><tt><b>analyze</b></tt> <dd><tt>analyze</tt> is used to run a specific
+ <dt><tt><b>analyze</b></tt></dt>
+ <dd><tt>analyze</tt> is used to run a specific
analysis on an input LLVM bytecode file and print out the results. It is
primarily useful for debugging analyses, or familiarizing yourself with
- what an analysis does.<p>
+ what an analysis does.</dd>
- <dt><tt><b>bugpoint</b></tt> <dd><tt>bugpoint</tt> is used to debug
+ <dt><tt><b>bugpoint</b></tt></dt>
+ <dd><tt>bugpoint</tt> is used to debug
optimization passes or code generation backends by narrowing down the
given test case to the minimum number of passes and/or instructions that
still cause a problem, whether it is a crash or miscompilation. See <a
href="HowToSubmitABug.html">HowToSubmitABug.html</a> for more information
- on using <tt>bugpoint</tt>.<p>
-
- <dt><tt><b>llvm-ar</b></tt> <dd>The archiver produces an archive containing
+ on using <tt>bugpoint</tt>.</dd>
+
+ <dt><tt><b>llvmc</b></tt></dt>
+ <dd>The LLVM Compiler Driver. This program can
+ be configured to utilize both LLVM and non-LLVM compilation tools to enable
+ pre-processing, translation, optimization, assembly, and linking of programs
+ all from one command line. <tt>llvmc</tt> also takes care of processing the
+ dependent libraries found in bytecode. This reduces the need to get the
+ traditional <tt>-l<name></tt> options right on the command line. Please
+ note that this tool is new in 1.4 and considered experimental. It will be
+ fully supported in 1.5.</dd>
+
+ <dt><tt><b>llvm-ar</b></tt></dt>
+ <dd>The archiver produces an archive containing
the given LLVM bytecode files, optionally with an index for faster
- lookup.<p>
+ lookup.</dd>
- <dt><tt><b>llvm-as</b></tt> <dd>The assembler transforms the human readable
- LLVM assembly to LLVM bytecode.<p>
-
- <dt><tt><b>llvm-dis</b></tt><dd>The disassembler transforms the LLVM
- bytecode to human readable LLVM assembly.<p>
-
- <dt><tt><b>llvm-link</b></tt><dd> <tt>llvm-link</tt>, not surprisingly,
- links multiple LLVM modules into a single program.<p>
+ <dt><tt><b>llvm-as</b></tt></dt>
+ <dd>The assembler transforms the human readable LLVM assembly to LLVM
+ bytecode.</dd>
+
+ <dt><tt><b>llvm-dis</b></tt></dt>
+ <dd>The disassembler transforms the LLVM bytecode to human readable
+ LLVM assembly.</dd>
+
+ <dt><tt><b>llvm-ld</b></tt></dt>
+ <dd><tt>llvm-ld</tt> is very similar to gccld and provides a general purpose
+ and extensible linker for LLVM. This is the linker invoked by <tt>llvmc</tt>.
+ It allows optimization modules to be loaded so that language specific
+ optimizations can be applied at link time. Please note that this tool is new
+ in LLVM 1.4 and still considered experimental. It will be fully supported in
+ LLVM 1.5.</dd>
+
+ <dt><tt><b>llvm-link</b></tt></dt>
+ <dd><tt>llvm-link</tt>, not surprisingly, links multiple LLVM modules into
+ a single program.</dd>
- <dt><tt><b>lli</b></tt><dd> <tt>lli</tt> is the LLVM interpreter, which
+ <dt><tt><b>lli</b></tt></dt>
+ <dd><tt>lli</tt> is the LLVM interpreter, which
can directly execute LLVM bytecode (although very slowly...). In addition
to a simple interpreter, <tt>lli</tt> also has a tracing mode (entered by
specifying <tt>-trace</tt> on the command line). Finally, for
- architectures that support it (currently only x86 and Sparc), by default,
+ architectures that support it (currently x86, Sparc, and PowerPC), by default,
<tt>lli</tt> will function as a Just-In-Time compiler (if the
functionality was compiled in), and will execute the code <i>much</i>
- faster than the interpreter.<p>
+ faster than the interpreter.</dd>
- <dt><tt><b>llc</b></tt><dd> <tt>llc</tt> is the LLVM backend compiler, which
+ <dt><tt><b>llc</b></tt></dt>
+ <dd> <tt>llc</tt> is the LLVM backend compiler, which
translates LLVM bytecode to a SPARC or x86 assembly file, or to C code (with
- the -march=c option).<p>
+ the -march=c option).</dd>
- <dt><tt><b>llvmgcc</b></tt><dd> <tt>llvmgcc</tt> is a GCC-based C frontend
+ <dt><tt><b>llvm-gcc</b></tt></dt>
+ <dd><tt>llvm-gcc</tt> is a GCC-based C frontend
that has been retargeted to emit LLVM code as the machine code output. It
works just like any other GCC compiler, taking the typical <tt>-c, -S, -E,
-o</tt> options that are typically used. The source code for the
- <tt>llvmgcc</tt> tool is currently not included in the LLVM CVS tree
- because it is quite large and not very interesting.<p>
-
+ <tt>llvm-gcc</tt> tool is currently not included in the LLVM CVS tree
+ because it is quite large and not very interesting.
<blockquote>
<dl>
- <dt><tt><b>gccas</b></tt> <dd>This tool is invoked by the
- <tt>llvmgcc</tt> frontend as the "assembler" part of the compiler. This
- tool actually assembles LLVM assembly to LLVM bytecode,
- performs a variety of optimizations, and outputs LLVM bytecode. Thus
- when you invoke <tt>llvmgcc -c x.c -o x.o</tt>, you are causing
- <tt>gccas</tt> to be run, which writes the <tt>x.o</tt> file (which is
- an LLVM bytecode file that can be disassembled or manipulated just like
- any other bytecode file). The command line interface to <tt>gccas</tt>
- is designed to be as close as possible to the <b>system</b>
- `<tt>as</tt>' utility so that the gcc frontend itself did not have to be
- modified to interface to a "weird" assembler.<p>
-
- <dt><tt><b>gccld</b></tt> <dd><tt>gccld</tt> links together several LLVM
- bytecode files into one bytecode file and does some optimization. It is
- the linker invoked by the GCC frontend when multiple .o files need to be
- linked together. Like <tt>gccas</tt>, the command line interface of
- <tt>gccld</tt> is designed to match the system linker, to aid
- interfacing with the GCC frontend.</dl><p>
+ <dt><tt><b>gccas</b></tt></dt>
+ <dd>This tool is invoked by the <tt>llvm-gcc</tt> frontend as the
+ "assembler" part of the compiler. This tool actually assembles LLVM
+ assembly to LLVM bytecode, performs a variety of optimizations, and
+ outputs LLVM bytecode. Thus when you invoke
+ <tt>llvm-gcc -c x.c -o x.o</tt>, you are causing <tt>gccas</tt> to be
+ run, which writes the <tt>x.o</tt> file (which is an LLVM bytecode file
+ that can be disassembled or manipulated just like any other bytecode
+ file). The command line interface to <tt>gccas</tt> is designed to be
+ as close as possible to the <b>system</b> `<tt>as</tt>' utility so that
+ the gcc frontend itself did not have to be modified to interface to
+ a "weird" assembler.</dd>
+
+ <dt><tt><b>gccld</b></tt></dt>
+ <dd><tt>gccld</tt> links together several LLVM bytecode files into one
+ bytecode file and does some optimization. It is the linker invoked by
+ the GCC frontend when multiple .o files need to be linked together.
+ Like <tt>gccas</tt>, the command line interface of <tt>gccld</tt> is
+ designed to match the system linker, to aid interfacing with the GCC
+ frontend.</dd>
+ </dl>
</blockquote>
+ </dd>
- <dt><tt><b>opt</b></tt><dd> <tt>opt</tt> reads LLVM bytecode, applies a
+ <dt><tt><b>opt</b></tt></dt>
+ <dd><tt>opt</tt> reads LLVM bytecode, applies a
series of LLVM to LLVM transformations (which are specified on the command
line), and then outputs the resultant bytecode. The '<tt>opt --help</tt>'
command is a good way to get a list of the program transformations
- available in LLVM.
-
+ available in LLVM.</dd>
</dl>
-
</div>
<!-- ======================================================================= -->
-<div class="doc_subsection">
- <a name="utils"><tt>llvm/utils</tt></a>
-</div>
-
+<div class="doc_subsection"><a name="utils"><tt>llvm/utils</tt></a></div>
<div class="doc_text">
<p>This directory contains utilities for working with LLVM source code, and some
<tt>xemacs `utils/getsources.sh`</tt> from the top of your LLVM source
tree.<p>
+ <dt><tt><b>llvmgrep</b></tt></dt>
+ <dd>This little tool performs an "egrep -H -n" on each source file in LLVM and
+ passes to it a regular expression provided on <tt>llvmgrep</tt>'s command
+ line. This is a very efficient way of searching the source base for a
+ particular regular expression.</dd>
+
<dt><tt><b>makellvm</b></tt> <dd>The <tt>makellvm</tt> script compiles all
files in the current directory and then compiles and links the tool that
is the first argument. For example, assuming you are in the directory
</div>
+<!-- ======================================================================= -->
+<div class="doc_subsection"><a name="win32"><tt>llvm/win32</tt></a></div>
+<div class="doc_text">
+ <p>This directory contains build scripts and project files for use with
+ Visual C++. This allows developers on Windows to build LLVM without the need
+ for Cygwin. The contents of this directory should be considered experimental
+ at this time.
+ </p>
+</div>
<!-- *********************************************************************** -->
<div class="doc_section">
<a name="tutorial">An Example Using the LLVM Tool Chain</a>
</pre></li>
<li><p>Next, compile the C file into a LLVM bytecode file:</p>
- <p><tt>% llvmgcc hello.c -o hello</tt></p>
+ <p><tt>% llvm-gcc hello.c -o hello</tt></p>
<p>Note that you should have already built the tools and they have to be
in your path, at least <tt>gccas</tt> and <tt>gccld</tt>.</p>
src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01!" /></a>
<a href="mailto:sabre@nondot.org">Chris Lattner</a><br>
+ <a href="http://llvm.x10sys.com/rspencer/">Reid Spencer</a><br>
<a href="http://llvm.cs.uiuc.edu">The LLVM Compiler Infrastructure</a><br>
Last modified: $Date$
</address>
-
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