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|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>How To Release LLVM To The Public</title>
<link rel="stylesheet" href="llvm.css" type="text/css">
</head>
<body>
<div class="doc_title">How To Release LLVM To The Public</div>
<p class="doc_warning">NOTE: THIS DOCUMENT IS A WORK IN PROGRESS!</p>
<ol>
<li><a href="#introduction">Introduction</a></li>
<li><a href="#process">Release Process</a></li>
<li><a href="#dist_targets">Distribution Targets</a></li>
</ol>
<div class="doc_author">
<p>Written by <a href="mailto:rspencer@x10sys.com">Reid Spencer</a>,
<a href="mailto:criswell@cs.uiuc.edu">John Criswell</a></p>
</div>
<!-- *********************************************************************** -->
<div class="doc_section"><a name="introduction">Introduction</a></div>
<!-- *********************************************************************** -->
<div class="doc_text">
<p>
This document collects information about successfully releasing LLVM to the
public. It is the release manager's guide to ensuring that a high quality
build of LLVM is released. Mostly, it's just a bunch of reminders of things to
do at release time so we don't inadvertently ship something that is utility
deficient.
</p>
<p>
There are three main tasks for building a release of LLVM:
</p>
<ol>
<li>Create the LLVM source distribution.</li>
<li>Create the LLVM GCC source distribtuion.</li>
<li>Create a set of LLVM GCC binary distribtuions for each supported
platform. These binary distributions must include compiled versions
of the libraries found in <tt>llvm/runtime</tt> from the LLVM
source distribution created in Step 1.</li>
</ol>
</div>
<!-- *********************************************************************** -->
<div class="doc_section"><a name="process">Release Process</a></div>
<!-- *********************************************************************** -->
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="overview">Process Overview</a></div>
<div class="doc_text">
<ol>
<li><a href="#updocs">Update Documentation</a></li>
<li><a href="#merge">Merge Branches</a></li>
<li><a href="#deps">Make LibDeps.txt</a></li>
<li><a href="#settle">Settle LLVM HEAD</a></li>
<li><a href="#tag">Tag LLVM and Create the Release Branch</a></li>
<li><a href="#verchanges">Update LLVM Version </a></li>
<li><a href="#build">Build LLVM</a></li>
<li><a href="#check">Run 'make check'</a></li>
<li><a href="#test">Run LLVM Test Suite</a></li>
<li><a href="#dist">Build the LLVM Source Distributions</a></li>
<li><a href="#rpm">Build RPM Packages (optional)</a></li>
<li><a href="#llvmgccbin">Build the LLVM GCC Binary Distribution</a></li>
<li><a href="#webupdates">Update the LLVM Website</a></li>
</ol>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="updocs">Update Documentation</a></div>
<div class="doc_text">
<p>
Review the documentation and ensure that it is up to date. The Release Notes
must be updated to reflect bug fixes, new known issues, and changes in the
list of supported platforms. The Getting Started Guide should be updated to
reflect the new release version number tag avaiable from Subversion and
changes in basic system requirements.
</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="merge">Merge Branches</a></div>
<div class="doc_text">
<p>
Merge any work done on branches intended for release into mainline. Finish and
commit all new features or bug fixes that are scheduled to go into the
release. Work that is not to be incorporated into the release should not be
merged from branchs or commited from developer's working directories.
</p>
<p>
From this point until the release branch is created, developers should
<em>not</em> commit changes to the <tt>llvm</tt> and <tt>llvm-gcc</tt>
Subversion repositories unless it is a bug fix <em>for the release</em>.
</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="deps">Make LibDeps.txt</a></div>
<div class="doc_text">
<p>
Rebuild the <tt>LibDeps.txt</tt> target in <tt>utils/llvm-config</tt>. This
makes sure that the <tt>llvm-config</tt> utility remains relevant for the
release, reflecting any changes in the library dependencies.
</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="settle">Settle Subversion HEAD</a></div>
<div class="doc_text">
<p>
Use the nightly test reports and 'make check' (deja-gnu based tests) to
ensure that recent changes and merged branches have not destabilized LLVM.
Platforms which are used less often should be given special attention as they
are the most likely to break from commits from the previous step.
</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="tag">Subversion Tag And Branch</a></div>
<div class="doc_text">
<p>Tag and branch the Subversion HEAD using the following procedure:</p>
<ol>
<li>
<p>Request all developers to refrain from committing. Offenders get commit
rights taken away (temporarily).</p></li>
<li>
<p>The Release Manager updates his/her <tt>llvm</tt>, <tt>llvm-test</tt>,
and <tt>llvm-gcc</tt> source trees with the latest sources from mainline
Subversion. The Release Manager may want to consider using a new working
directory for this to keep current uncommitted work separate from release
work.</p></li>
<li>
<p>The Release Manager tags his/her <tt>llvm</tt>, <tt>llvm-test</tt>, and
<tt>llvm-gcc</tt> working directories with "<tt>RELEASE_XX</tt>" where
<tt>XX</tt> is the major and minor release numbers. So, for Release 1.2,
<tt>XX=12</tt> and for Release 1.10, <tt>XX=110</tt>.</p>
<div class="doc_code">
<pre>
svn copy https://llvm.org/svn/llvm-project/llvm/trunk \
https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_<i>XX</i>
svn copy https://llvm.org/svn/llvm-project/llvm-gcc-4.0/trunk \
https://llvm.org/svn/llvm-project/llvm-gcc-4.0/tags/RELEASE_<i>XX</i>
svn copy https://llvm.org/svn/llvm-project/test-suite/trunk \
https://llvm.org/svn/llvm-project/test-suite/tags/RELEASE_<i>XX</i>
</pre>
</div>
</li>
<li>
<p>Immediately create Subversion branches based on the
<tt>RELEASE_<i>XX</i></tt> tag. The tag should be
"<tt>release_<i>XX</i></tt>" (where XX matches that used for the
<tt>RELEASE_<i>XX</i></tt> tag). This is where the release distribution
will be created.</p>
<div class="doc_code">
<pre>
svn copy https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_<i>XX</i> \
https://llvm.org/svn/llvm-project/llvm/branches/release_<i>XX</i>
svn copy https://llvm.org/svn/llvm-project/llvm-gcc-4.0/tags/RELEASE_<i>XX</i> \
https://llvm.org/svn/llvm-project/llvm-gcc-4.0/branches/release_<i>XX</i>
svn copy https://llvm.org/svn/llvm-project/test-suite/tags/RELEASE_<i>XX</i> \
https://llvm.org/svn/llvm-project/test-suite/branches/release_<i>XX</i>
</pre>
</div>
</li>
<li>
<p>Advise developers they can work on Subversion HEAD again.</p></li>
<li>
<p>The Release Manager and any developers working on the release should switch
to the release branch (as all changes to the release will now be done in
the branch). The easiest way to do this is to grab another working copy
using the following commands:</p>
<div class="doc_code">
<pre>
svn co https://llvm.org/svn/llvm-project/llvm/branches/release_<i>XX</i>
svn co https://llvm.org/svn/llvm-project/llvm-gcc-4.0/branches/release_<i>XX</i>
svn co https://llvm.org/svn/llvm-project/test-suite/branches/release_<i>XX</i>
</pre>
</div></li>
</ol>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="verchanges">Update LLVM Version</a></div>
<div class="doc_text">
<p>
After creating the LLVM release branch, update the release branchs'
autoconf/configure.ac version from X.Xsvn to just X.X. Update it on mainline
as well to be the next version (X.X+1svn).
</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="build">Build LLVM</a></div>
<div class="doc_text">
<p>
Build both debug and release (optimized) versions of LLVM on all
platforms. Ensure the build is warning and error free on each platform.
</p>
<p>
Build a new version of the LLVM GCC front-end after building the LLVM tools.
Once that is complete, go back to the LLVM source tree and build and install
the <tt>llvm/runtime</tt> libraries.
</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="check">Run 'make check'</a></div>
<div class="doc_text">
<p>
Run <tt>make check</tt> and ensure there are no unexpected failures. If there
are, resolve the failures, commit them ba
|
