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<?php $root=""; ?><?php require($root."navigation.php"); ?><html><head>  <title>Download and Installation</title>  <?php load_style($root); ?></head><body><?php make_navigation("download",$root)?><div class="content"><h1>Installation Instructions</h1><a name="getsoftware"></a><h2>Getting the Software</h2>The <code>libMesh</code> source can be <a href="http://sourceforge.net/project/showfiles.php?group_id=71130">downloaded from the project's SourceForge homepage</a>.Stable releases are located there as compressed tar archives. You may alsoaccess the SVN source tree for the latest code. You can get read-only accessto the SVN repository via:<br><div class="fragment">  <pre>svn checkout https://libmesh.svn.sourceforge.net/svnroot/libmesh/trunk/libmesh </pre></div><br>More information regarding the <code>libMesh</code> SVN repository may be found <a href="subversion.php"> here</a>.<br><br>If you would like to contribute to the project you will need a SourceForgedeveloper account, or you can contribute patches. To create a patch from amodified SVN tree simply do:<br><div class="fragment">  <pre>svn diff &gt; patch </pre></div><br>in the top-level directory. You can then submit the file <code>patch</code>.<a name="compilers"></a><h2>Compilers</h2><code>libMesh</code> makes extensive use of the standard C++ library,so you will need a decent, standards-compliant compiler. We have triedvery hard to make the code completely compiler-agnostic by avoidingquestionable (but legal) constructs. If you have a compiler that won'tbuild the code please let us know. You will also need a decent C compilerif you want to build some of the contributed packages that add functionalityto the library.<br>The library is known to work with the following compilers:<br><ul>  <li>GNU GCC</li>    <ul>      <li><code>gcc</code> 4.x</li>      <li><code>gcc</code> 3.x</li>      <li><code>gcc</code> 2.95.3</li>      <li><code>gcc</code> 2.96 (RedHat's compiler in the 7.x series)</li>    </ul>  <li>Intel ICC/ECC</li>    <ul>      <li><code>icc/ifort</code> 10.x, 9.x, 8.x</li>      <li><code>icc/ifc</code> 7.x</li>      <li><code>icc/ifc</code> 6.0</li>      <li>Earlier versions (&lt;= 5.0) not supported</li>    </ul>  <li>SGI Altix</li>    <ul>      <li><code>icc/ifort</code> 9.x, 8.x</li>      <li><code>ecc/efc</code> 7.1</li>      <li><code>MPT MPI</code> 1.9.1</li>    </ul>  <li>SGI IRIX 6.5 with MIPSPro Compilers</li>    <ul>      <li><code>CC/cc</code> version 7.4.2</li>    </ul>  <li>Sun ONE Studio Compilers</li>    <ul>      <li>Version 5.5 tested <code>(CXXFLAGS=-library=stlport4 CPPFLAGS=-library=stlport4 CXX=CC CC=cc ./configure [...])</code></li>      <li>Must use the STLPort C++ standard library provided with the compiler</li>    </ul>  <li>HP, use <code>CXX="aCC -AA" CC="cc -Aa"</code> to get full std support</li>    <ul>      <li><code>aCC</code> A.03.37</li>    </ul>  <li>IBM <code>xlC</code> version 5.0, 6.0</li>  <li>HP/Compaq/DEC <code>cxx</code> 6.3.9.6</li></ul><a name="conf"></a><h2>Configuration</h2>Configuring the library is straightforward. The GNU autoconf package is usedto determine site-specific configuration parameters. A standard build willoccur after typing<br><div class="fragment"><pre>./configuremake</pre></div><br>in the top-level project directory. To see all the configuration options type<p><div class="fragment"><pre>./configure --help</pre></div><br>The configure script will find your compilers and create the <code>Make.common</code>file with the configuration for your site. If you want to use different compilers thanthose found by configure you can specify them in environment variables. For example,the following will build with the <code>MIPS</code> compilers on an SGI:<br><div class="fragment"><pre>CXX=CC CC=cc F77=f77 CXXFLAGS=-LANG:std ./configure</pre></div><br>Note that the FORTRAN compiler is not actually used to compile any part of the library,but <code>configure</code> uses it to find out how to link FORTRAN libraries with C++ code.<a name="build"></a><h2>Building the Library</h2>To build the library you need <code>GNU</code> <code>Make</code> and a supported compiler,as listed in the <a href="installation.php#compilers">Compiler</a> section. After the libraryis configured simply type <code>make</code> to build the library. Typing<code>make bin/meshtool</code> will build a mesh translation tool using the library.<br>The Makefiles distributed with the library look at the shell environment variable<code>METHOD</code> to determine what mode the library should be built in. Valid values for <code>METHOD</code> are <code>opt</code> (optimized mode, the default if <code>METHOD</code> is empty), <code>dbg</code> (build with debug symbols), and <code>pro</code> (build with profiling support for use with <code>gprof)</code>. Once the library is configured you can build it simply by typing<div class="fragment"><pre>make</pre></div><a name="test"></a><h2>Testing the Library</h2><h3>Running the Examples</h3><code>libMesh</code> includes a number of examples in the <code>examples</code>directory. From the top-level directory you can build and run the example programs by typing<div class="fragment"><pre>make run_examples</pre></div><br>Note that the example programs all create output in the <code>GMV</code> format,since you can <a href="http://laws.lanl.gov/XCM/gmv/GMVHome.html">download GMV</a>for free from Los Alamos National Lab. It is a simple matter to change the sourcein the example to write a different format, just replace the <code>write_gmv</code>function call with whatever you like.<h3>Unit Tests</h3>The SVN repository contains a <code>libmesh_tests</code> entry in the main trunkthat contains a series of unit tests which can be used to validate a <code>libMesh</code>installation.  You may download the tests via<div class="fragment">  <pre> svn checkout https://libmesh.svn.sourceforge.net/svnroot/libmesh/trunk/libmesh_tests</pre></div><a name="link"></a><h2>Linking With Your Application</h2>Since <code>libMesh</code> can be configured with many additional packages we recommendincluding the <code>Make.common</code> file created in the top-level directory in the<code>Makefile</code> of any application you want to use with the library. This willproperly set the <code>libmesh_INCLUDE</code> and <code>libmesh_LIBS</code> variables, which you canappend to with your own stuff.<br>For testing simple programs you may want to use the <code>libmesh-config</code> scriptincluded in the <code>contrib/bin</code> directory instead of creating a <code>Makefile</code>.This script may be used to determine the relevant compilation and linking flagsused by <code>libMesh</code>. For example, you could build the application <code>foo</code> from<code>foo.C</code> like this:<div class="fragment"><pre>c++ -o foo foo.C `libmesh-config --cxxflags --include --ldflags`</pre></div><br> </div><?php make_footer() ?></body></html><?php if (0) { ?># Local Variables:# mode: html# End:<?php } ?>
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