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Add instructions for building a cross-compiler. Patch contributed by

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Anton Korobeynikov.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29330 91177308-0d34-0410-b5e6-96231b3b80d8
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Reid Spencer 2006-07-27 05:43:30 +00:00
parent c148e5e487
commit 17850ef897
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docs/GettingStarted.html
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@ -31,6 +31,7 @@
<li><a href="#installcf">Install the GCC Front End</a>
<li><a href="#config">Local LLVM Configuration</a>
<li><a href="#compile">Compiling the LLVM Suite Source Code</a>
<li><a href="#cross-compile">Compiling LLVM As A Cross-Compiler</a>
<li><a href="#objfiles">The Location of LLVM Object Files</a>
<li><a href="#optionalconfig">Optional Configuration Items</a>
</ol></li>
@ -986,6 +987,46 @@ that directory that is out of date.</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection">
<a name="cross-compile">Compiling LLVM As A Cross-compiler</a>
</div>
<div class="doc_text">
<p>LLVM can be built as a cross-compiler, however some additional steps are
required.<sup><a href="#ccn_1">1</a></sup> To build a cross-compiler, use
these instructions:</p>
<ol>
<li>Configure and build LLVM Suite as a native compiler. You will need
just <tt>TableGen</tt> from that build.
<ul>
<li>If you have <tt>$LLVM_OBJ_ROOT=$LLVM_SRC_ROOT</tt> just execute
<tt>make -C utils/TableGen</tt> after configuring.</li>
<li>Otherwise you will need to monitor building process and terminate
it just after <tt>TableGen</tt> was built.</li>
</ul>
</li>
<li>Copy the TableGen binary to somewhere safe (out of your build tree).
</li>
<li>Configure LLVM to build as a cross-compiler. To do this, supply the
configure script with <tt>--build</tt> and <tt>--host</tt> options that
are different. The values of these options must be legal target triples and
should specify a processor for which LLVM supports code generation.</li>
<li>Put the saved <tt>TableGen</tt> executable into the
into <tt>$LLVM_OBJ_ROOT/{BUILD_TYPE}/bin</tt> directory (e.g. into
<tt>.../Release/bin</tt> for a Release build).</li>
<li>Build LLVM as usual.</li>
</ol>
<p><b>Notes:</b></p>
<div class="doc_notes">
<ol>
<li><a name="ccn_1">Cross-compiling</a> was tested only with Linux as
build platform and Windows as host using mingw32 cross-compiler. Other
combinations have not been tested.</li>
</ol>
</div>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection">
<a name="objfiles">The Location of LLVM Object Files</a>