ding dong llvm-gcc3 is dead

llvm-svn: 32868
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Chris Lattner 2007-01-04 07:08:27 +00:00
parent 13ce918505
commit 424d4dc713
1 changed files with 2 additions and 74 deletions

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<li><a href="#tutorial">An Example Using the LLVM Tool Chain</a>
<ol>
<li><a href="#tutorial4">Example with llvm-gcc4</a></li>
<li><a href="#tutorial3">Example with llvm-gcc3</a></li>
</ol>
<li><a href="#problems">Common Problems</a>
<li><a href="#links">Links</a>
@ -648,12 +647,6 @@ compressed with the gzip program.
<dt><tt>llvm-test-x.y.tar.gz</tt></dt>
<dd>Source release for the LLVM test suite.</dd>
<dt><tt>llvm-gcc3.4-x.y.source.tar.gz</tt></dt>
<dd>Source release of the LLVM GCC 3.4 front end.<br/></dd>
<dt><tt>llvm-gcc3.4-x.y-platform.tar.gz</tt></dt>
<dd>Binary release of the LLVM GCC 3.4 for a specific platform.<br/></dd>
<dt><tt>llvm-gcc4-x.y.source.tar.gz</tt></dt>
<dd>Source release of the llvm-gcc4 front end. See README.LLVM in the root
directory for build instructions.<br/></dd>
@ -750,11 +743,6 @@ location must be specified when the LLVM suite is configured.</p>
-</tt></li>
</ol>
<p>Next, you will need to fix your system header files (llvm-gcc3.4 only):</p>
<p><tt>cd llvm-gcc3.4/<i>platform</i><br>
./fixheaders</tt></p>
<p>The binary versions of the GCC front end may not suit all of your needs. For
example, the binary distribution may include an old version of a system header
file, not "fix" a header file that needs to be fixed for GCC, or it may be
@ -1504,8 +1492,8 @@ are code generators for parts of LLVM infrastructure.</p>
<!-- *********************************************************************** -->
<div class="doc_text">
<p>This section gives an example of using LLVM. Since we are currently
transitioning from llvm-gcc3 to llvm-gcc4, we include examples for both.
<p>This section gives an example of using LLVM. llvm-gcc3 is now obsolete,
so we only include instructiosn for llvm-gcc4.
</p>
<p><b>Note:</b> The <i>gcc4</i> frontend's invocation is <b><i>considerably different</i></b>
@ -1588,66 +1576,6 @@ output.</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="tutorial3">Example with llvm-gcc3</a></div>
<div class="doc_text">
<ol>
<li>First, create a simple C file, name it 'hello.c':
<pre>
#include &lt;stdio.h&gt;
int main() {
printf("hello world\n");
return 0;
}
</pre></li>
<li><p>Next, compile the C file into a LLVM bytecode file:</p>
<p><tt>% llvm-gcc hello.c -o hello</tt></p>
<p>Note that you should have already built the tools and they have to be
in your path, at least <tt>gccas</tt> and <tt>gccld</tt>.</p>
<p>This will create two result files: <tt>hello</tt> and
<tt>hello.bc</tt>. The <tt>hello.bc</tt> is the LLVM bytecode that
corresponds the the compiled program and the library facilities that it
required. <tt>hello</tt> is a simple shell script that runs the bytecode
file with <tt>lli</tt>, making the result directly executable. Note that
all LLVM optimizations are enabled by default, so there is no need for a
"-O3" switch.</p></li>
<li><p>Run the program. To make sure the program ran, execute one of the
following commands:</p>
<p><tt>% ./hello</tt></p>
<p>or</p>
<p><tt>% lli hello.bc</tt></p></li>
<li><p>Use the <tt>llvm-dis</tt> utility to take a look at the LLVM assembly
code:</p>
<p><tt>% llvm-dis &lt; hello.bc | less</tt><br><br></li>
<li><p>Compile the program to native assembly using the LLC code
generator:</p>
<p><tt>% llc hello.bc -o hello.s</tt></p>
<li><p>Assemble the native assembly language file into a program:</p>
<p><b>Solaris:</b><tt>% /opt/SUNWspro/bin/cc -xarch=v9 hello.s -o hello.native</tt></p>
<p><b>Others:</b><tt>% gcc hello.s -o hello.native</tt></p>
<li><p>Execute the native code program:</p>
<p><tt>% ./hello.native</tt></p></li>
</ol>
</div>
<!-- *********************************************************************** -->
<div class="doc_section">