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| <title>Using The LLVM Libraries</title> |
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| </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> |
| <br>Last modified: $Date$ </div> |
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