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Installing the GCC front end is no longer supported.

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Chad Rosier 2012-02-26 22:17:05 +00:00
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@ -29,7 +29,6 @@
<li><a href="#unpack">Unpacking the LLVM Archives</a></li>
<li><a href="#checkout">Checkout LLVM from Subversion</a></li>
<li><a href="#git_mirror">LLVM GIT mirror</a></li>
<li><a href="#installcf">Install the GCC Front End</a></li>
<li><a href="#config">Local LLVM Configuration</a></li>
<li><a href="#compile">Compiling the LLVM Suite Source Code</a></li>
<li><a href="#cross-compile">Cross-Compiling LLVM</a></li>
@ -964,76 +963,6 @@ git svn rebase -l
</div>
<!-- ======================================================================= -->
<h3>
<a name="installcf">Install the GCC Front End</a>
</h3>
<div>
<p>Before configuring and compiling the LLVM suite (or if you want to use just the LLVM
GCC front end) you can optionally extract the front end from the binary distribution.
It is used for running the LLVM test-suite and for compiling C/C++ programs. Note that
you can optionally <a href="GCCFEBuildInstrs.html">build llvm-gcc yourself</a> after building the
main LLVM repository.</p>
<p>To install the GCC front end, do the following (on Windows, use an archival tool
like <a href="http://www.7-zip.org/">7-zip</a> that understands gzipped tars):</p>
<ol>
<li><tt>cd <i>where-you-want-the-front-end-to-live</i></tt></li>
<li><tt>gunzip --stdout llvm-gcc-4.2-<i>version</i>-<i>platform</i>.tar.gz | tar -xvf
-</tt></li>
</ol>
<p>Once the binary is uncompressed, if you're using a *nix-based system, add a symlink for
<tt>llvm-gcc</tt> and <tt>llvm-g++</tt> to some directory in your path. If you're using a
Windows-based system, add the <tt>bin</tt> subdirectory of your front end installation directory
to your <tt>PATH</tt> environment variable. For example, if you uncompressed the binary to
<tt>c:\llvm-gcc</tt>, add <tt>c:\llvm-gcc\bin</tt> to your <tt>PATH</tt>.</p>
<p>If you now want to build LLVM from source, when you configure LLVM, it will
automatically detect <tt>llvm-gcc</tt>'s presence (if it is in your path) enabling its
use in test-suite. Note that you can always build or install <tt>llvm-gcc</tt> at any
point after building the main LLVM repository: just reconfigure llvm and
test-suite will pick it up.
</p>
<p>As a convenience for Windows users, the front end binaries for MinGW/x86 include
versions of the required w32api and mingw-runtime binaries. The last remaining step for
Windows users is to simply uncompress the binary binutils package from
<a href="http://mingw.org/">MinGW</a> into your front end installation directory. While the
front end installation steps are not quite the same as a typical manual MinGW installation,
they should be similar enough to those who have previously installed MinGW on Windows systems.</p>
<p>To install binutils on Windows:</p>
<ol>
<li><tt><i>download GNU Binutils from <a href="http://sourceforge.net/projects/mingw/files/">MinGW Downloads</a></i></tt></li>
<li><tt>cd <i>where-you-uncompressed-the-front-end</i></tt></li>
<li><tt><i>uncompress archived binutils directories (not the tar file) into the current directory</i></tt></li>
</ol>
<p>The binary versions of the LLVM 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 linked with
libraries not available on your system. In cases like these, you may want to try
<a href="GCCFEBuildInstrs.html">building the GCC front end from source</a>. Thankfully,
this is much easier now than it was in the past.</p>
<p>We also do not currently support updating of the GCC front end by manually overlaying
newer versions of the w32api and mingw-runtime binary packages that may become available
from MinGW. At this time, it's best to think of the MinGW LLVM GCC front end binary as
a self-contained convenience package that requires Windows users to simply download and
uncompress the GNU Binutils binary package from the MinGW project.</p>
<p>Regardless of your platform, if you discover that installing the LLVM GCC front end
binaries is not as easy as previously described, or you would like to suggest improvements,
please let us know how you would like to see things improved by dropping us a note on our
<a href="http://llvm.org/docs/#maillist">mailing list</a>.</p>
</div>
<!-- ======================================================================= -->
<h3>
<a name="config">Local LLVM Configuration</a>
@ -1072,29 +1001,6 @@ script to configure the build system:</p>
<p>The following options can be used to set or enable LLVM specific options:</p>
<dl>
<dt><i>--with-llvmgccdir</i></dt>
<dd>Path to the LLVM C/C++ FrontEnd to be used with this LLVM configuration.
The value of this option should specify the full pathname of the C/C++ Front
End to be used. If this option is not provided, the PATH will be searched for
a program named <i>llvm-gcc</i> and the C/C++ FrontEnd install directory will
be inferred from the path found. If the option is not given, and no llvm-gcc
can be found in the path then a warning will be produced by
<tt>configure</tt> indicating this situation. LLVM may still be built with
the <tt>tools-only</tt> target but attempting to build the runtime libraries
will fail as these libraries require llvm-gcc and llvm-g++. See
<a href="#installcf">Install the GCC Front End</a> for details on installing
the C/C++ Front End. See
<a href="GCCFEBuildInstrs.html">Bootstrapping the LLVM C/C++ Front-End</a>
for details on building the C/C++ Front End.</dd>
<dt><i>--with-tclinclude</i></dt>
<dd>Path to the tcl include directory under which <tt>tclsh</tt> can be
found. Use this if you have multiple tcl installations on your machine and you
want to use a specific one (8.x) for LLVM. LLVM only uses tcl for running the
dejagnu based test suite in <tt>llvm/test</tt>. If you don't specify this
option, the LLVM configure script will search for the tcl 8.4 and 8.3
releases.
<br><br>
</dd>
<dt><i>--enable-optimized</i></dt>
<dd>
Enables optimized compilation (debugging symbols are removed