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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+ <title>Using The LLVM Libraries</title>
+ <link rel="stylesheet" href="llvm.css" type="text/css">
+</head>
+<body>
+<div class="doc_title">Using The LLVM Libraries</div>
+<ol>
+ <li><a href="#abstract">Abstract</a></li>
+ <li><a href="#introduction">Introduction</a></li>
+ <li><a href="#descriptions">Library Descriptions</a></li>
+ <li><a href="#dependencies">Library Dependencies</a></li>
+ <li><a href="#rot">Linkage Rules Of Thumb</a>
+ <ol>
+ <li><a href="#always">Always link LLVMCore, LLVMSupport, LLVMSystem</a>
+ <li><a href="#onlyone">Never link both archive and re-linked</a>
+ </ol>
+ </li>
+</ol>
+
+<div class="doc_author">
+ <p>Written by <a href="mailto:rspencer@x10sys.com">Reid Spencer</a></p>
+</div>
+
+<!-- ======================================================================= -->
+<div class="doc_section"><a name="abstract">Abstract</a></div>
+<div class="doc_text">
+ <p>Amongst other things, LLVM is a toolkit for building compilers, linkers,
+ runtime executives, virtual machines, and other program execution related
+ tools. In addition to the LLVM tool set, the functionality of LLVM is
+ available through a set of libraries. To use LLVM as a toolkit for
+ constructing tools, a developer needs to understand what is contained in the
+ various libraries, what they depend on, and how to use them. This document
+ describes the contents of the libraries and how and when to use them.
+</p>
+</div>
+
+<!-- ======================================================================= -->
+<div class="doc_section"> <a name="introduction">Introduction</a></div>
+<div class="doc_text">
+ <p>If you're writing a compiler, virtual machine, or any other utility based
+ on LLVM, you'll need to figure out which of the many libraries files you will
+ need to link with to be successful. An understanding of the contents of these
+ files and their inter-relationships will be useful in coming up with an optimal
+ specification for the libraries to link with. The purpose of this document is
+ to reduce some of the trial and error that the author experienced in using
+ LLVM.</p>
+ <p>LLVM produces two types of libraries: archives (ending in <tt>.a</tt>) and
+ objects (ending in <tt>.o</tt>). However, both are libraries. Libraries ending
+ in <tt>.o</tt> are known as re-linked libraries because they contain all the
+ compilation units of the library linked together as a single <tt>.o</tt> file.
+ Furthermore, many of the libraries have <em>both</em> forms of library. The
+ re-linked libraries are used whenever you want to include all symbols from the
+ library. The archive libraries are used whenever you want to only resolve
+ outstanding symbols at that point in the link without including everything in
+ the library. </p>
+ <p>When linking your tools, you will use the <tt>LLVMLIBS</tt> make variable.
+ (see the <a href="MakefileGuide.html#LLVMLIBS">Makefile Guide</a> for
+ details). This variable specifies which LLVM libraries to link into your tool
+ and the order in which they will be linked. You specify re-linked libraries by
+ naming the library without a suffix. You specify archive libraries by naming
+ the library with a <tt>.a</tt> suffix but without the <tt>lib</tt> prefix. The
+ order in which the libraries appear in the <tt>LLVMLIBS</tt> variable
+ definition is the order in which they will be linked. Getting this order
+ correct for your tool can sometimes be challenging.
+</div>
+<!-- ======================================================================= -->
+<div class="doc_section"><a name="descriptions"></a>Library Descriptions</div>
+<div class="doc_text">
+ <p>The table below categorizes each library
+<table style="text-align:left">
+ <tr><th>Library</th><th>Forms</th><th>Description</th></tr>
+ <tr><th colspan="3">Core Libraries</th></tr>
+ <tr><td>LLVMArchive</td><td><tt>.a</tt></td>
+ <td>LLVM archive reading and writing</td></tr>
+ <tr><td>LLVMAsmParser</td><td><tt>.o</tt></td>
+ <td>LLVM assembly parsing</td></tr>
+ <tr><td>LLVMBCReader</td><td><tt>.o</tt></td>
+ <td>LLVM bytecode reading</td></tr>
+ <tr><td>LLVMBCWriter</td><td><tt>.o</tt></td>
+ <td>LLVM bytecode writing</td></tr>
+ <tr><td>LLVMCore</td><td><tt>.o</tt></td>
+ <td>LLVM core intermediate representation</td></tr>
+ <tr><td>LLVMDebugger</td><td><tt>.o</tt></td>
+ <td>Source level debugging support</td></tr>
+ <tr><td>LLVMLinker</td><td><tt>.a</tt></td>
+ <td>Bytecode and archive linking interface</td></tr>
+ <tr><td>LLVMSupport</td><td><tt>.a .o</tt></td>
+ <td>General support utilities</td></tr>
+ <tr><td>LLVMSystem</td><td><tt>.a .o</tt></td>
+ <td>Operating system abstraction layer</td></tr>
+
+ <tr><th colspan="3">Analysis Libraries</th></tr>
+ <tr><td>LLVMAnalysis</td><td><tt>.a .o</tt></td>
+ <td>Various analysis passes.</td></tr>
+ <tr><td>LLVMDataStructure</td><td><tt>.a .o</tt></td>
+ <td>Data structure analysis passes.</td></tr>
+ <tr><td>LLVMipa</td><td><tt>.a .o</tt></td>
+ <td>Inter-procedural analysis passes.</td></tr>
+
+ <tr><th colspan="3">Transformation Libraries</th></tr>
+ <tr><td>LLVMInstrumentation</td><td><tt>.a .o</tt></td>
+ <td>Instrumentation passes.</td></tr>
+ <tr><td>LLVMipo</td><td><tt>.a .o</tt></td>
+ <td>All inter-procedural optimization passes.</td></tr>
+ <tr><td>LLVMScalarOpts</td><td><tt>.a .o</tt></td>
+ <td>All scalar optimization passes.</td></tr>
+ <tr><td>LLVMTransforms</td><td><tt>.a .o</tt></td>
+ <td>Uncategorized transformation passes.</td></tr>
+ <tr><td>LLVMTransformUtils</td><td><tt>.a .o</tt></td>
+ <td>Transformation utilities.</td></tr>
+ <tr><td>LLVMProfilePaths</td><td><tt>.o</tt></td>
+ <td>Profile paths for instrumentation.</td></tr>
+
+ <tr><th colspan="3">Code Generation Libraries </th></tr>
+ <tr><td>LLVMCodeGen</td><td><tt>.o</tt></td>
+ <td>Native code generation infrastructure</td></tr>
+
+ <tr><th colspan="3">Target Libraries</th></tr>
+ <tr><td>LLVMCBackend</td><td><tt>.o</tt></td>
+ <td>'C' language code generator.</td></tr>
+ <tr><td>LLVMPowerPC</td><td><tt>.o</tt></td>
+ <td>PowerPC code generation backend</td></tr>
+ <tr><td>LLVMSelectionDAG</td><td><tt>.o</tt></td>
+ <td>Aggressive instruction selector for directed acyclic graphs.</td></tr>
+ <tr><td>LLVMSkeleton</td><td><tt>.a .o</tt></td>
+ <td>Skeleton for a code generation backend.</td></tr>
+ <tr><td>LLVMSparcV8</td><td><tt>.o</tt></td>
+ <td>Code generation for SparcV8.</td></tr>
+ <tr><td>LLVMSparcV9</td><td><tt>.o</tt></td>
+ <td>Code generation for SparcV9.</td></tr>
+ <tr><td>LLVMSparcV9RegAlloc</td><td><tt>.a .o</tt></td>
+ <td>Graph-coloring register allocator for SparcV9.</td></tr>
+ <tr><td>LLVMSparcV9InstrSched</td><td><tt>.o</tt></td>
+ <td>Instruction scheduling for SparcV9.</td></tr>
+ <tr><td>LLVMSparcV9LiveVar</td><td><tt>.o</tt></td>
+ <td>Live variable analysis SparcV9.</td></tr>
+ <tr><td>LLVMSparcV9ModuloSched</td><td><tt>.o</tt></td>
+ <td>Modulo scheduling for SparcV9.</td></tr>
+ <tr><td>LLVMTarget</td><td><tt>.a .o</tt></td>
+ <td>Generic code generation utilities.</td></tr>
+ <tr><td>LLVMX86</td><td><tt>.o</tt></td>
+ <td>Intel x86 code generation backend</td></tr>
+
+ <tr><th colspan="3">Runtime Libraries</th></tr>
+ <tr><td>LLVMInterpreter</td><td><tt>.o</tt></td>
+ <td>Bytecode Interpreter</td></tr>
+ <tr><td>LLVMJIT</td><td><tt>.o</tt></td>
+ <td>Bytecode JIT Compiler</td></tr>
+ <tr><td>LLVMExecutionEngine</td><td><tt>.o</tt></td>
+ <td>Virtual machine engine</td></tr>
+ <tr><td>LLVMexecve</td><td><tt>.o</tt></td>
+ <td>execve(2) replacement for llee</td></tr>
+</table>
+</div>
+
+<!-- ======================================================================= -->
+<div class="doc_section"><a name="dependencies"></a>Library Dependencies</div>
+<div class="doc_text">
+ <p>Below are two dependency graphs and a list that show the relationships
+ between the various LLVM archive libraries and object files. This information
+ can be automatically generated with the <tt>GenLibDeps.pl</tt> utility found
+ in the <tt>llvm/utils</tt> directory.</p>
+ <!-- =======NOTE: =========================================================-->
+ <!-- === The following graphs and <dl> list are generated automatically ===-->
+ <!-- === by the util named GenLibDeps.pl in the llvm/utils directory. ===-->
+ <!-- === This should be updated whenever new libraries are added, ===-->
+ <!-- === removed, or changed ===-->
+ <!-- =======NOTE: =========================================================-->
+ <h2>Dependency Relationships Of Libraries</h2>
+ <p>This graph shows the dependency of archive libraries on other archive
+ libraries or objects. Where a library has both archive and object forms, only
+ the archive form is shown.</p>
+ <img src="img/libdeps.gif" alt="Library Dependencies"/>
+ <h2>Dependency Relationships Of Object Files</h2>
+ <p>This graph shows the dependency of object files on archive libraries or
+ other objects. Where a library has both object and archive forms, only the
+ dependency to the archive form is shown.</p>
+ <img src="img/objdeps.gif" alt="Object File Dependencies"/>
+ <p>The following list shows the dependency relationships between libraries in
+ textual form. The information is the same as shown on the graphs but arranged
+ alphabetically.</p>
+<dl>
+ <dt><b>libLLVMAnalysis.a</b</dt><dd><ul>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>libLLVMArchive.a</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMSystem.a</li>
+ <li>LLVMBCReader.o</li>
+ </ul></dd>
+ <dt><b>libLLVMDataStructure.a</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>libLLVMInstrumentation.a</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>libLLVMLinker.a</b</dt><dd><ul>
+ <li>libLLVMArchive.a</li>
+ <li>libLLVMSystem.a</li>
+ <li>LLVMBCReader.o</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>libLLVMScalarOpts.a</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>libLLVMSparcV9RegAlloc.a</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ <li>LLVMSparcV9LiveVar.o</li>
+ <li>LLVMSparcV9.o</li>
+ </ul></dd>
+ <dt><b>libLLVMSupport.a</b</dt><dd><ul>
+ <li>libLLVMSystem.a</li>
+ <li>LLVMbzip2.o</li>
+ </ul></dd>
+ <dt><b>libLLVMSystem.a</b</dt><dd></dd>
+ <dt><b>libLLVMTarget.a</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>libLLVMTransformUtils.a</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>libLLVMTransforms.a</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>libLLVMipa.a</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>libLLVMipo.a</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMipa.a</li>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMAnalysis.o</b</dt><dd><ul>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMAsmParser.o</b</dt><dd><ul>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMBCReader.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMSystem.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMBCWriter.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMCBackend.o</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMipa.a</li>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMCodeGen.o</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMCore.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ </ul></dd>
+ <dt><b>LLVMDataStructure.o</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMDebugger.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMSystem.a</li>
+ <li>LLVMBCReader.o</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ <li>LLVMExecutionEngine.o</li>
+ </ul></dd>
+ <dt><b>LLVMExecutionEngine.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMSystem.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMCore.o</li>
+ <li>LLVMInterpreter.o</li>
+ <li>LLVMJIT.o</li>
+ </ul></dd>
+ <dt><b>LLVMInstrumentation.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMInterpreter.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMSystem.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMCore.o</li>
+ <li>LLVMExecutionEngine.o</li>
+ </ul></dd>
+ <dt><b>LLVMJIT.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMSystem.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMCore.o</li>
+ <li>LLVMExecutionEngine.o</li>
+ </ul></dd>
+ <dt><b>LLVMPowerPC.o</b</dt><dd><ul>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMProfilePaths.o</b</dt><dd><ul>
+ <li>libLLVMInstrumentation.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMScalarOpts.o</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMSelectionDAG.o</b</dt><dd><ul>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMSkeleton.o</b</dt><dd><ul>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMSparcV8.o</b</dt><dd><ul>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMSparcV9.o</b</dt><dd><ul>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSparcV9RegAlloc.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMBCWriter.o</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ <li>LLVMSparcV9InstrSched.o</li>
+ <li>LLVMSparcV9ModuloSched.o</li>
+ </ul></dd>
+ <dt><b>LLVMSparcV9InstrSched.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ <li>LLVMSparcV9LiveVar.o</li>
+ <li>LLVMSparcV9.o</li>
+ </ul></dd>
+ <dt><b>LLVMSparcV9LiveVar.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMSparcV9ModuloSched.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ <li>LLVMSparcV9.o</li>
+ </ul></dd>
+ <dt><b>LLVMSparcV9RegAlloc.o</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ <li>LLVMSparcV9LiveVar.o</li>
+ <li>LLVMSparcV9.o</li>
+ </ul></dd>
+ <dt><b>LLVMSupport.o</b</dt><dd><ul>
+ <li>libLLVMSystem.a</li>
+ <li>LLVMbzip2.o</li>
+ </ul></dd>
+ <dt><b>LLVMSystem.o</b</dt><dd></dd>
+ <dt><b>LLVMTarget.o</b</dt><dd><ul>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMTransformUtils.o</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMTransforms.o</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMX86.o</b</dt><dd><ul>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>LLVMCodeGen.o</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMbzip2.o</b</dt><dd></dd>
+ <dt><b>LLVMipa.o</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+ <dt><b>LLVMipo.o</b</dt><dd><ul>
+ <li>libLLVMAnalysis.a</li>
+ <li>libLLVMipa.a</li>
+ <li>libLLVMScalarOpts.a</li>
+ <li>libLLVMSupport.a</li>
+ <li>libLLVMTarget.a</li>
+ <li>libLLVMTransformUtils.a</li>
+ <li>LLVMCore.o</li>
+ </ul></dd>
+</dl>
+</div>
+
+<!-- ======================================================================= -->
+<div class="doc_section"><a name="rot">Linkage Rules Of Thumb</a></div>
+<div class="doc_text">
+ <p>This section contains various "rules of thumb" about what files you
+ should link into your programs.</p>
+</div>
+<!-- ======================================================================= -->
+<div class="doc_subsection"><a name="always">Always Link LLVMCore, LLVMSupport,
+ and LLVMSystem</a></div>
+<div class="doc_text">
+ <p>No matter what you do with LLVM, the last three entries in the value of
+ your LLVMLIBS make variable should always be:
+ <tt>LLVMCore LLVMSupport.a LLVMSystem.a</tt>. There are no <tt>LLVM</tt>
+ programs that don't depend on these three.</p>
+</div>
+<!-- ======================================================================= -->
+<div class="doc_subsection"><a name="onlyone">Never link both archive and
+ re-linked library</a></div>
+<div class="doc_text">
+ <p>There is never any point to linking both the re-linked (<tt>.o</tt>) and
+ the archive (<tt>.a</tt>) versions of a library. Since the re-linked version
+ includes the entire library, the archive version will not resolve any symbols.
+ You could even end up with link error if you place the archive version before
+ the re-linked version on the linker's command line.</p>
+</div>
+<!-- ======================================================================= -->
+<hr>
+<div class="doc_footer">
+<address>
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+ <a href="mailto:rspencer@x10sys.com">Reid Spencer</a>
+</address>
+<a href="http://llvm.cs.uiuc.edu">The LLVM Compiler Infrastructure</a>
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