2006-03-23 06:45:42 +00:00
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<title>How To Release LLVM To The Public</title>
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<link rel="stylesheet" href="llvm.css" type="text/css">
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</head>
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<body>
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<div class="doc_title">How To Release LLVM To The Public</div>
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<p class="doc_warning">NOTE: THIS DOCUMENT IS A WORK IN PROGRESS!</p>
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<ol>
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<li><a href="#introduction">Introduction</a></li>
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2006-04-10 21:43:05 +00:00
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<li><a href="#process">Release Process</a></li>
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2006-03-23 06:45:42 +00:00
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</ol>
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<div class="doc_author">
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<p>Written by <a href="mailto:rspencer@x10sys.com">Reid Spencer</a></p>
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</div>
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<!-- *********************************************************************** -->
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<div class="doc_section"><a name="introduction">Introduction</a></div>
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<!-- *********************************************************************** -->
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<div class="doc_text">
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<p>This document collects information about successfully releasing LLVM to the
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public. It is the release manager's guide to ensuring that a high quality build
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of LLVM is released. Mostly, its just a bunch of reminders of things to do at
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release time so we don't inadvertently ship something that is utility
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deficient.</p>
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</div>
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<!-- *********************************************************************** -->
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<div class="doc_section"><a name="process">Release Process</a></div>
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<!-- *********************************************************************** -->
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<!-- ======================================================================= -->
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<div class="doc_subsection"><a name="overview">Process Overview</a></div>
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<div class="doc_text">
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<ol>
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<li><a href="#merge">Merge Branches</a></li>
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<li><a href="#settle">Settle LLVM HEAD</a></li>
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<li><a href="#build">Build LLVM</a></li>
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<li><a href="#check">Run 'make check'</a></li>
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<li><a href="#test">Run LLVM Test Suite</a></li>
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<li><a href="#deps">make LibDeps.txt</a></li>
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<li><a href="#tag">cvs tag</a></li>
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<li><a href="#dist">make dist</a></li>
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<li><a href="#release">release</a></li>
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</ol>
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</div>
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<!-- ======================================================================= -->
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<div class="doc_subsection"><a name="merge">Merge Branches</a></div>
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<div class="doc_text">
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<p>Merge any work done on branches intended for release into mainline. Work that
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is not to be incorporated into the release should not be merged from the branch.
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</p>
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</div>
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<!-- ======================================================================= -->
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<div class="doc_subsection"><a name="settle">Settle CVS HEAD</a></div>
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<div class="doc_text">
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<p>Use the nightly test reports, and 'make check' (deja-gnu based tests) to
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increase the quality of LLVM and ensure that merged branches have not
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destabilized LLVM.</p>
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</div>
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<!-- ======================================================================= -->
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<div class="doc_subsection"><a name="build">Build LLVM</a></div>
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<div class="doc_text">
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<p>Build both debug and release versions of LLVM on all platforms. Ensure
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build is warning and error free on each platform.</p>
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</div>
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<!-- ======================================================================= -->
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<div class="doc_subsection"><a name="check">Run 'make check'</a></div>
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<div class="doc_text">
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<p>Run <tt>make check</tt> and ensure there are no unexpected failures. If
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there are, resolve the failures and go back to <a href="#settle">step 2</a>.
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Ensure that 'make check' passes on all platforms for all targets. If certain
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failures cannot be resolved before release time, determine if marking them
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XFAIL is appropriate. If not, fix the bug and go back. The test suite must
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complete with "0 unexpected failures" for release.
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</p>
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</div>
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<!-- ======================================================================= -->
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<div class="doc_subsection"><a name="test">LLVM Test Suite</a></div>
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<div class="doc_text">
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<p>Run the llvm-test suite and ensure there are no unacceptable failures.
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If there are, resolve the failures and go back to step 2. The test suite
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should be run in Nightly Test mode. All tests must pass. If they do not,
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investigate and go back to settling CVS HEAD.</p>
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</div>
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<!-- ======================================================================= -->
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<div class="doc_subsection"><a name="deps">Make LibDeps.txt</a></div>
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<div class="doc_text">
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<p>Rebuild the <tt>LibDeps.txt</tt> target in <tt>utils/llvm-config</tt>. This
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makes sure that the <tt>llvm-config</tt> utility remains relevant for the
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release, reflecting any changes in the library dependencies.</p>
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</div>
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<!-- ======================================================================= -->
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<div class="doc_subsection"><a name="tag">CVS Tag And Branch</a></div>
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<div class="doc_text">
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<p>Tag and branch the CVS HEAD using the following procedure:</p>
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<ol>
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<li>Request all developers to refrain from committing. Offenders get commit
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rights taken away (temporarily).</li>
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<li>Tag the cvs HEAD with "ROOT_RELEASE_XX" where XX is the major and minor
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release numbers (you can't have . in a cvs tag name). So, for Release 1.2,
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XX=12 and for Release 1.10, XX=110.</li>
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<li>Immediately create a cvs branch based on the ROOT_RELEASE tag. This is
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where the release distribution will be created.</li>
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<li>Advise developers they can work on CVS HEAD again.</li>
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<li>Ensure all subsequent building and fixing is done on this branch.</li>
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</div>
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<!-- ======================================================================= -->
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<div class="doc_subsection"><a name="dist">Run 'make dist'</a></div>
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<div class="doc_text">
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<p>Build the distribution, ensuring it is installable and working. This is a
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two step process. First, use "make dist" to simply build the distribution. Any
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failures need to be corrected (on the branch). Once "make dist" can be
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successful, do "make dist-check". This target will do the same thing as the
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'dist' target but also test that distribution to make sure it works. This
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ensures that needed files are not missing and that the src tarball can be
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successfully unbacked, built, installed, and cleaned. This two-level testing
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needs to be done on each target platform.</p>
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</div>
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<!-- ======================================================================= -->
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<div class="doc_subsection"><a name="release">Release</a></div>
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<div class="doc_text">
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2006-04-11 06:21:25 +00:00
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<p>Release the distribution tarball to the public. This consists of generating
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several tarballs. The first set, the source distributions, are automatically
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generated by the "make dist" and "make dist-check". There are gzip, bzip2, and
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zip versions of these bundles.</p>
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<p>The second set of tarballs is the binary release. When "make dist-check"
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succeeds, it will have created an _install directory into which it installed
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the binary release. You need to rename that directory as "llvm" and then
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create tarballs from the contents of that "llvm" directory.</p>
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<p>Finally, use rpm to make an rpm package based on the llvm.spec file. Don't
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forget to update the version number, documentation, etc. in the llvm.spec
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file.</p>
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</div>
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<!-- *********************************************************************** -->
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<hr>
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<a href="mailto:rspencer@x10sys.com">Reid Spencer</a><br>
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<a href="http://llvm.cs.uiuc.edu">The LLVM Compiler Infrastructure</a>
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<br/>
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Last modified: $Date$
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</address>
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