<ol>
<li><a href="#libraries">Libraries</a>
<ol>
- <li><a href="#Modules">Bytecode Modules</a></li>
+ <li><a href="#BCModules">Bytecode Modules</a></li>
+ <li><a href="#LoadableModules">Loadable Modules</a></li>
</ol>
</li>
<li><a href="#tools">Tools</a>
</div>
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-<div class="doc_subsubsection"><a name="Modules">Bytecode Modules</a></div>
+<div class="doc_subsubsection"><a name="BCModules">Bytecode Modules</a></div>
<div class="doc_text">
<p>In some situations, it is desireable to build a single bytecode module from
a variety of sources, instead of an archive, shared library, or bytecode
</p>
</div>
+<!-- ======================================================================= -->
+<div class="doc_subsubsection">
+ <a name="LodableModules">Loadable Modules</a>
+</div>
+<div class="doc_text">
+ <p>In some situations, you need to create a loadable module. Loadable modules
+ can be loaded into programs like <tt>opt</tt> or <tt>llc</tt> to specify
+ additional passes to run or targets to support. Loadable modules are also
+ useful for debugging a pass or providing a pass with another package if that
+ pass can't be included in LLVM.</p>
+ <p>LLVM provides complete support for building such a module. All you need to
+ do is use the LOADABLE_MODULE variable in your Makefile. For example, to
+ build a loadable module named <tt>MyMod</tt> that uses the LLVM libraries
+ <tt>LLVMSupport.a</tt> and <tt>LLVMSystem.a</tt>, you would specify:</p>
+ <pre><tt>
+ LIBRARYNAME := MyMod
+ LOADABLE_MODULE := 1
+ USEDLIBS := LLVMSupport.a LLVMSystem.a
+ </tt></pre>
+ <p>Use of the <tt>LOADABLE_MODULE</tt> facility implies several things:</p>
+ <ol>
+ <li>There will be no "lib" prefix on the module. This differentiates it from
+ a standard shared library of the same name.</li>
+ <li>The <a href="#SHARED_LIBRARY">SHARED_LIBRARY</a> variable is turned
+ on.</li>
+ <li>The <a href="#LINK_LIBS_IN_SHARED">LINK_LIBS_IN_SHARED</a> variable
+ is turned on.</li>
+ <li>The <a href="#DONT_BUILD_RELINKED">DONT_BUILD_RELINKED</a> variable
+ is turned on.</li>
+ </ol>
+ <p>A loadable module is loaded by LLVM via the facilities of libtool's libltdl
+ library which is part of <tt>lib/System</tt> implementation.</p>
+</div>
+
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<div class="doc_subsection"><a name="tools">Tools</a></div>
<div class="doc_text">