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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>
<ol>
<li><a href="#introduction">Introduction</a></li>
<li><a href="#introduction">Release Timeline</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>,
<a href="mailto:tonic@nondot.org">Tanya Lattner</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.
</p>
<p>
The following is the basic criteria for releasing LLVM:
</p>
<ol>
<li>Successful configure and build.</li>
<li>Clean 'make check'.</li>
<li>No regressions in the testsuite from the previous release. This may
include performance regressions for major benchmarks.</li>
</ol>
</div>
<!-- *********************************************************************** -->
<div class="doc_section"><a name="process">Release Timeline</a></div>
<!-- *********************************************************************** -->
<div class="doc_text">
The release manager should attempt to have a release every 3-4 months because LLVM
does time based releases (instead of feature based). The release schedule should
be roughly as follows:
<ol>
<li>Set code freeze and branch creation date for 3 months after last release
date. Announce release schedule to the LLVM community and update the website.</li>
<li>Create release branch and begin release process. </li>
<li>Send out pre-release for first round of testing. Testing will last 7-10 days.
During the first round of testing, regressions should be found and fixed. Patches
are merged from mainline to the release branch.</li>
<li>Generate and send out second pre-release. Bugs found during this time will
not be fixed unless absolutely critical. Bugs introduce by patches merged in
will be fixed and if so, a 3rd round of testing is needed.</li>
<li>The release notes should be updated during the first and second round of
pre-release testing.</li>
<li>Finally, release!</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="#branch">Create Release Branch</a></li>
<li><a href="#verchanges">Update LLVM Version </a></li>
<li><a href="#dist">Build the LLVM Source Distributions</a></li>
<li><a href="#build">Build LLVM</a></li>
<li><a href="#llvmgccbin">Build the LLVM GCC Binary Distribution</a></li>
<li><a href="#rpm">Build RPM Packages (optional)</a></li>
<li><a href="#check">Run 'make check'</a></li>
<li><a href="#test">Run LLVM Test Suite</a></li>
<li><a href="#prerelease">Pre-Release Testing</a></li>
<li><a href="#tag">Tag the LLVM Release Branch</a></li>
<li><a href="#updocs">Update Documentation</a></li>
<li><a href="#updemo">Update the LLVM Demo Page</a></li>
<li><a href="#webupdates">Update the LLVM Website</a></li>
<li><a href="#announce">Announce the Release</a></li>
</ol>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="branch">Create Release Branch</a></div>
<div class="doc_text">
<p>Branch the Subversion HEAD using the following procedure:</p>
<ol>
<li>
<p>Verify that the current Subversion HEAD is in decent shape by examining nightly
tester results.</p></li>
<li>
<p>Request all developers to refrain from committing. Offenders get commit
rights taken away (temporarily).</p></li>
<li>
<p> Create the release branch for <tt>llvm</tt>, <tt>llvm-gcc4.0</tt>,
<tt>llvm-gcc4.2</tt>, and the <tt>test-suite</tt>. The
branch name will be <tt>release_XX</tt>, where <tt>XX</tt> is the major and
minor release numbers. These branches can be created without checking out
anything from subversion.
</p>
<div class="doc_code">
<pre>
svn copy https://llvm.org/svn/llvm-project/llvm/trunk \
https://llvm.org/svn/llvm-project/llvm/branches/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/branches/release_<i>XX</i>
svn copy https://llvm.org/svn/llvm-project/llvm-gcc-4.2/trunk \
https://llvm.org/svn/llvm-project/llvm-gcc-4.2/branches/release_<i>XX</i>
svn copy https://llvm.org/svn/llvm-project/test-suite/trunk \
https://llvm.org/svn/llvm-project/test-suite/branches/release_<i>XX</i>
</pre>
</div>
<li>
<p>Advise developers they can work on Subversion HEAD again.</p></li>
<li>
<p>The Release Manager 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/llvm-gcc-4.2/branches/release_<i>XX</i>
svn co https://llvm.org/svn/llvm-project/test-suite/branches/release_<i>XX</i>
</pre>
</div></li>
</div>
</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 branches'
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). Regenerated the configure script
for both. This must be done for both llvm and the test-suite.
</p>
<p>In addition, the version number of all the Bugzilla components must be
updated for the next release.
</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="dist">Build the LLVM Source Distributions</a></div>
<div class="doc_text">
<p>
Create source distributions for LLVM, LLVM GCC, and the LLVM Test Suite by
exporting the source from Subversion and archiving it. This can be done with
the following commands:
</p>
<div class="doc_code">
<pre>
svn export https://llvm.org/svn/llvm-project/llvm/branches/release_<i>XX</i> llvm-X.X
svn export https://llvm.org/svn/llvm-project/llvm-gcc-4.0/branches/release_<i>XX</i> llvm-gcc4.0-X.X.source
svn export https://llvm.org/svn/llvm-project/llvm-gcc-4.2/branches/release_<i>XX</i> llvm-gcc4.2-X.X.source
svn export https://llvm.org/svn/llvm-project/test-suite/branches/release_<i>XX</i> llvm-test-X.X
tar -cvf - llvm-X.X | gzip > llvm-X.X.tar.gz
tar -cvf - llvm-test-X.X | gzip > llvm-test-X.X.tar.gz
tar -cvf - llvm-gcc4.0-X.X.source | gzip > llvm-gcc-4.0-X.X.source.tar.gz
tar -cvf - llvm-gcc4.2-X.X.source | gzip > llvm-gcc-4.2-X.X.source.tar.gz
</pre>
</div>
</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.
Note that when building the LLVM GCC Binary, use a release build of LLVM.
</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="llvmgccbin">Build the LLVM GCC Binary Distribution</a></div>
<div class="doc_text">
<p>
Creating the LLVM GCC binary distribution (release/optimized) requires
performing the following steps for each supported platform:
</p>
<ol>
<li>
Build the LLVM GCC front-end by following the directions in the README.LLVM
file. Be sure to build with LLVM_VERSION_INFO=X.X, where X is the major and
minor release numbers.
</li>
<li>
Copy the installation directory to a directory named for the specific target.
For example on Red Hat Enterprise Linux, the directory would be named
<tt>llvm-gcc4.0-2.1-x86-linux-RHEL4</tt>. Archive and compress the new directory.
</li>
</ol>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection"><a name="check">Run 'make check'</a></div>
<div class="doc_text">
<p>
Using the newly built llvm-gcc and llvm, reconfigure llvm to locate llvm-gcc.
Run <tt>make check</tt> and ensure there are no unexpected failures. If there
are, resolve the failures or file a bug. If there is a fix commited to mainline,
merge back into the release branch, and restart testing by
<a href="#build">re-building LLVM</a> and <a href="#build">llvm-gcc</a>. If no
fix will be made, XFAIL the test and commit back to the release branch.
</p>
<p>
Ensure that '<tt>make check</tt>' passes on all platforms for all targets. The
test suite must complete with "0 unexpected failures" before sending out the
pre-re
|
