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			607 lines
		
	
	
		
			26 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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|                       "http://www.w3.org/TR/html4/strict.dtd">
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| <html>
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| <head>
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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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| 
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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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|   <li><a href="#process">Release Process</a></li>
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|   <li><a href="#dist_targets">Distribution Targets</a></li>
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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>,
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|   <a href="mailto:criswell@cs.uiuc.edu">John Criswell</a></p>
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| </div>
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| 
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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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| 
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| <div class="doc_text">
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|   <p>
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|   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
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|   build of LLVM is released. Mostly, it's just a bunch of reminders of things to
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|   do at release time so we don't inadvertently ship something that is utility
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|   deficient.
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|   </p>
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| 
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|   <p>
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|   There are three main tasks for building a release of LLVM:
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|   </p>
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| 
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|   <ol>
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|     <li>Create the LLVM source distribution.</li>
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|     <li>Create the LLVM GCC source distribtuion.</li>
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|     <li>Create a set of LLVM GCC binary distribtuions for each supported
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|         platform.  These binary distributions must include compiled versions
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|         of the libraries found in <tt>llvm/runtime</tt> from the LLVM
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|         source distribution created in Step 1.</li>
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|   </ol>
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| </div>
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| 
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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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| <!-- ======================================================================= -->
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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="#updocs">Update Documentation</a></li>
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|     <li><a href="#merge">Merge Branches</a></li>
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|     <li><a href="#deps">Make LibDeps.txt</a></li>
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|     <li><a href="#settle">Settle LLVM HEAD</a></li>
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|     <li><a href="#tag">Tag LLVM and Create the Release Branch</a></li>
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|     <li><a href="#verchanges">Update LLVM Version </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="#dist">Build the LLVM Source Distributions</a></li>
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|     <li><a href="#rpm">Build RPM Packages (optional)</a></li>
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|     <li><a href="#llvmgccbin">Build the LLVM GCC Binary Distribution</a></li>
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|     <li><a href="#webupdates">Update the LLVM Website</a></li>
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|   </ol>
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| </div>
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| 
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| <!-- ======================================================================= -->
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| <div class="doc_subsection"><a name="updocs">Update Documentation</a></div>
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| <div class="doc_text">
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|   <p>
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|   Review the documentation and ensure that it is up to date.  The Release Notes
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|   must be updated to reflect bug fixes, new known issues, and changes in the
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|   list of supported platforms.  The Getting Started Guide should be updated to
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|   reflect the new release version number tag avaiable from Subversion and
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|   changes in basic system requirements.
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|   </p>
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| </div>
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| 
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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>
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|   Merge any work done on branches intended for release into mainline. Finish and
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|   commit all new features or bug fixes that are scheduled to go into the
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|   release.  Work that is not to be incorporated into the release should not be
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|   merged from branchs or commited from developer's working directories.
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|   </p>
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| 
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|   <p>
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|   From this point until the release branch is created, developers should
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|   <em>not</em> commit changes to the <tt>llvm</tt> and <tt>llvm-gcc</tt>
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|   Subversion repositories unless it is a bug fix <em>for the release</em>.
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|   </p>
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| </div>
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| 
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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>
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|   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.
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|   </p>
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| </div>
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| 
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| <!-- ======================================================================= -->
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| <div class="doc_subsection"><a name="settle">Settle Subversion HEAD</a></div>
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| <div class="doc_text">
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|   <p>
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|   Use the nightly test reports and 'make check' (deja-gnu based tests) to 
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|   ensure that recent changes and merged branches have not destabilized LLVM.
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|   Platforms which are used less often should be given special attention as they
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|   are the most likely to break from commits from the previous step.
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|   </p>
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| </div>
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| 
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| <!-- ======================================================================= -->
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| <div class="doc_subsection"><a name="tag">Subversion Tag And Branch</a></div>
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| <div class="doc_text">
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|   <p>Tag and branch the Subversion HEAD using the following procedure:</p>
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|   <ol>
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|     <li>
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|     <p>Request all developers to refrain from committing. Offenders get commit
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|     rights taken away (temporarily).</p></li>
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| 
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|     <li>
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|     <p>The Release Manager updates his/her <tt>llvm</tt>, <tt>llvm-test</tt>,
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|     and <tt>llvm-gcc</tt> source trees with the latest sources from mainline
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|     Subversion.  The Release Manager may want to consider using a new working
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|     directory for this to keep current uncommitted work separate from release
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|     work.</p></li>
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| 
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|     <li>
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|     <p>The Release Manager tags his/her <tt>llvm</tt>, <tt>llvm-test</tt>, and
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|     <tt>llvm-gcc</tt> working directories with "<tt>RELEASE_XX</tt>" where
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|     <tt>XX</tt> is the major and minor release numbers. So, for Release 1.2,
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|     <tt>XX=12</tt> and for Release 1.10, <tt>XX=110</tt>.</p>
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| 
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| <div class="doc_code">
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| <pre>
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| svn copy https://llvm.org/svn/llvm-project/llvm/trunk \
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|          https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_<i>XX</i>
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| svn copy https://llvm.org/svn/llvm-project/llvm-gcc-4.0/trunk \
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|          https://llvm.org/svn/llvm-project/llvm-gcc-4.0/tags/RELEASE_<i>XX</i>
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| svn copy https://llvm.org/svn/llvm-project/test-suite/trunk \
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|          https://llvm.org/svn/llvm-project/test-suite/tags/RELEASE_<i>XX</i>
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| </pre>
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| </div>
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|     </li>
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| 
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|     <li>
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|     <p>Immediately create Subversion branches based on the
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|     <tt>RELEASE_<i>XX</i></tt> tag. The tag should be
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|     "<tt>release_<i>XX</i></tt>" (where XX matches that used for the
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|     <tt>RELEASE_<i>XX</i></tt> tag).  This is where the release distribution
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|     will be created.</p>
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| 
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| <div class="doc_code">
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| <pre>
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| svn copy https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_<i>XX</i> \
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|          https://llvm.org/svn/llvm-project/llvm/branches/release_<i>XX</i>
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| svn copy https://llvm.org/svn/llvm-project/llvm-gcc-4.0/tags/RELEASE_<i>XX</i> \
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|          https://llvm.org/svn/llvm-project/llvm-gcc-4.0/branches/release_<i>XX</i>
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| svn copy https://llvm.org/svn/llvm-project/test-suite/tags/RELEASE_<i>XX</i> \
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|          https://llvm.org/svn/llvm-project/test-suite/branches/release_<i>XX</i>
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| </pre>
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| </div>
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|     </li>
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| 
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|     <li>
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|     <p>Advise developers they can work on Subversion HEAD again.</p></li>
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| 
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|     <li>
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|     <p>The Release Manager and any developers working on the release should switch
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|     to the release branch (as all changes to the release will now be done in
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|     the branch).  The easiest way to do this is to grab another working copy
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|     using the following commands:</p>
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| 
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| <div class="doc_code">
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| <pre>
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| svn co https://llvm.org/svn/llvm-project/llvm/branches/release_<i>XX</i>
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| svn co https://llvm.org/svn/llvm-project/llvm-gcc-4.0/branches/release_<i>XX</i>
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| svn co https://llvm.org/svn/llvm-project/test-suite/branches/release_<i>XX</i>
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| </pre>
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| </div></li>
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|   </ol>
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| </div>
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| 
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| <!-- ======================================================================= -->
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| <div class="doc_subsection"><a name="verchanges">Update LLVM Version</a></div>
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| <div class="doc_text">
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|   <p>
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|   After creating the LLVM release branch, update the release branchs'
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|   autoconf/configure.ac version from X.Xsvn to just X.X. Update it on mainline
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|   as well to be the next version (X.X+1svn).
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|   </p>
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| </div>
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| 
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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>
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|   Build both debug and release (optimized) versions of LLVM on all
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|   platforms. Ensure the build is warning and error free on each platform.
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|   </p>
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| 
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|   <p>
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|   Build a new version of the LLVM GCC front-end after building the LLVM tools.
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|   Once that is complete, go back to the LLVM source tree and build and install
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|   the <tt>llvm/runtime</tt> libraries.
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|   </p>
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| </div>
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| 
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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>
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|   Run <tt>make check</tt> and ensure there are no unexpected failures. If there
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|   are, resolve the failures, commit them back into the release branch, and
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|   restart testing by <a href="#build">re-building LLVM</a>.
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|   </p>
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| 
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|   <p>
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|   Ensure that '<tt>make check</tt>' passes on all platforms for all targets. If
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|   certain failures cannot be resolved before release time, determine if marking
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|   them <tt>XFAIL</tt> is appropriate. If not, fix the bug and go back. The test
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|   suite must 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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| <!-- ======================================================================= -->
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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>
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|   Run the <tt>llvm-test</tt> suite and ensure there are no unacceptable
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|   failures.  If there are, resolve the failures and go back to <a
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|   href="#build">re-building LLVM</a>. The test suite should be run in Nightly
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|   Test mode. All tests must pass.
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|   </p>
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| </div>
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| 
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| <!-- ======================================================================= -->
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| <div class="doc_subsection"><a name="dist">Build the LLVM Source Distributions</a></div>
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| <div class="doc_text">
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|   <p>
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|   Create source distributions for LLVM, LLVM GCC, and the LLVM Test Suite by
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|   exporting the source from Subversion and archiving it.  This can be done with
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|   the following commands:
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|   </p>
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| 
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| <div class="doc_code">
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| <pre>
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| svn export https://llvm.org/svn/llvm-project/llvm/branches/release_<i>XX</i> llvm
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| svn export https://llvm.org/svn/llvm-project/llvm-gcc-4.0/branches/release_<i>XX</i> llvm-gcc
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| svn export https://llvm.org/svn/llvm-project/test-suite/branches/release_<i>XX</i> llvm-test
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| mkdir cfrontend; mv llvm-gcc cfrontend/src
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| tar -cvf - llvm          | gzip > llvm-X.X.tar.gz
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| tar -cvf - llvm-test     | gzip > llvm-test-X.X.tar.gz
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| tar -cvf - cfrontend/src | gzip > cfrontend-X.X.source.tar.gz
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| </pre>
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| </div>
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| </div>
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| 
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| <!-- ======================================================================= -->
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| <div class="doc_subsection"><a name="rpm">Building RPM packages (optional)</a></div>
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| <div class="doc_text">
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|   <p>
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|   You can, optionally, create source and binary RPM packages for LLVM. These may
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|   make it easier to get LLVM into a distribution. This can be done with the
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|   following commands:
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|   </p>
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| 
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| <div class="doc_code">
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| <pre>
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| make dist        # Build the distribution source tarball
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| make dist-check  # Check that the source tarball can build itself.
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| cp llvm-M.m.tar.gz /usr/src/redhat/SOURCES  # Required by rpmbuild
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| make srpm # for source rpm
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| make rpm  # for binary rpm
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| </pre>
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| </div>
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| 
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|   <p>
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|   First, use <tt>make dist</tt> to simply build the distribution. Any failures
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|   need to be corrected (on the branch). Once <tt>make dist</tt> can be
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|   successful, do <tt>make dist-check</tt>. This target will do the same thing as
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|   the 'dist' target but also test that distribution to make sure it can build
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|   itself and runs <tt>make check</tt> as well. This ensures that needed files
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|   are not missing and that the src tarball can be successfully unpacked, built,
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|   installed, and cleaned. Once you have a reliable tarball, you need to copy it
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|   to the <tt>/usr/src/redhat/SOURCES</tt> directory which is a requirement of
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|   the rpmbuild tool. The last two <tt>make</tt> invocations just run rpmbuild to
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|   build either a source (<tt>srpm</tt>) or binary (<tt>rpm</tt>) RPM package.
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|   </p>
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| </div>
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| 
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| <!-- ======================================================================= -->
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| <div class="doc_subsection"><a name="llvmgccbin">Build the LLVM GCC Binary Distribution</a></div>
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| <div class="doc_text">
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|   <p>
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|   Creating the LLVM GCC binary distribution requires performing the following
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|   steps for each supported platform:
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|   </p>
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| 
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|   <ol>
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|     <li>
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|     Build the LLVM GCC front-end.  The LLVM GCC front-end must be installed in
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|     a directory named <tt>cfrontend/<platform>/llvm-gcc</tt>.  For
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|     example, the Sparc/Solaris directory is named
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|     <tt>cfrontend/sparc/llvm-gcc</tt>.
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|     </li>
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| 
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|     <li>
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|     Build the libraries in <tt>llvm/runtime</tt> and install them into the 
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|     created LLVM GCC installation directory.
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|     </li>
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| 
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|     <li>
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|     For systems with non-distributable header files (e.g. Solaris), manually
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|     remove header files that the GCC build process has "fixed."  This process
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|     is admittedly painful, but not as bad as it looks; these header files are
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|     almost always easily identifiable with simple grep expressions and are
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|     installed in only a few directories in the GCC installation directory.
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|     </li>
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| 
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|     <li>
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|     Add the copyright files and header file fix script.
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|     </li>
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| 
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|     <li>
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|     Archive and compress the installation directory.  These can be found in
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|     previous releases of the LLVM-GCC front-end.
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|     </li>
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|   </ol>
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| </div>
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| 
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| 
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| <!-- ======================================================================= -->
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| <div class="doc_subsection"><a name="webupdates">Update the LLVM Website</a></div>
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| <div class="doc_text">
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|   <p>
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|   Check out the <tt>website</tt> module from Subversion. Create a new
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|   subdirectory X.X in the releases directory. Place the <tt>llvm</tt>,
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|   <tt>llvm-test</tt>, <tt>llvm-gcc</tt> source, and <tt>llvm-gcc</tt> binaries
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|   in this new directory. Copy the <tt>llvm/docs</tt> and <tt>LICENSE.txt</tt>
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|   files into this new directory. Update the <tt>releases/download.html</tt> file
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|   with the new release.  Update the <tt>releases/index.html</tt> with the new
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|   release. Finally, update the main page (<tt>index.html</tt> and sidebar) to
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|   point to the new release and release announcement. Make sure this all gets
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|   commited back into Subversion.
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|   </p>
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| </div>
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| 
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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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|   <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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| 
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| <!-- *********************************************************************** -->
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| <div class="doc_section"><a name="dist_targets">Distribution Targets</a></div>
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| <!-- *********************************************************************** -->
 | |
| 
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| <!-- ======================================================================= -->
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| <div class="doc_subsection">Overview</div>
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| <div class="doc_text">
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|   <p>
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|   The first thing you need to understand is that there are multiple make targets
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|   to support this feature. Here's an overview, we'll delve into the details
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|   later.
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|   </p>
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| 
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|   <ul>
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|     <li><b>distdir</b> - builds the distribution directory from which the 
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|         distribution will be packaged</li>
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|     <li><b>dist</b> - builds each of the distribution tarballs (tar.gz, 
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|         tar.bzip2, .zip). These can be built individually as well, with separate
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|         targets.</li>
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|     <li><b>dist-check</b> - this is identical to <tt>dist</tt> but includes a
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|         check on the distribution that ensures the tarball can: unpack
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|          successfully, compile correctly, pass '<tt>make check</tt>', and pass
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|          '<tt>make clean</tt>'.</li>
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|     <li><b>dist-clean</b>- this just does a normal clean but also cleans up the
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|         stuff generated by the other three <tt>dist</tt> targets (above).</li>
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|   </ul>
 | |
| 
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|   <p>
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|   Okay, that's the basic functionality. When making a release, we want to ensure
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|   that the tree you build the distribution from passes
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|   <tt>dist-check</tt>. Beyond fixing the usual bugs, there is generally one
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|   impediment to making the release in this fashion: missing files. The
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|   <tt>dist-check</tt> process guards against that possibility. It will either
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|   fail and that failure will indicate what's missing, or it will succeed meaning
 | |
|   that it has proved that the tarballs can actually succeed in building LLVM
 | |
|   correctly and that it passes <tt>make check</tt>.
 | |
|   </p>
 | |
| </div>
 | |
| 
 | |
| <!-- ======================================================================= -->
 | |
| 
 | |
| <div class="doc_subsection">distdir</div>
 | |
| <div class="doc_text">
 | |
|   <p>
 | |
|   This target builds the distribution directory which is the directory from 
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|   which the tarballs are generated. The distribution directory has the same 
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|   name as the release, e.g. LLVM-1.7). This target goes through the following 
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|   process:
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|   </p>
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| 
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|   <ol>
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|     <li>First, if there was an old distribution directory (for the current 
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|         release), it is removed in its entirety and you see <tt>Removing old 
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|         LLVM-1.7</tt></li>
 | |
|     <li>Second, it issues a <tt>make all ENABLE_OPTIMIZED=3D1</tt> to ensure 
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|         that the everything in your tree can be built in release mode. Often
 | |
|         times there are discrepancies in building between debug and release
 | |
|         modes so it enforces release mode first. If that fails, the
 | |
|         <tt>distdir</tt> target fails too. This is preceded by the message
 | |
|         <tt>Making 'all' to verify build</tt>.</li>
 | |
|     <li>Next, it traverses your source tree and copies it to a new directory 
 | |
|         that has the name of the release (<tt>LLVM-M.m</tt> in our current
 | |
|         case). This is the directory that will get tar'd. It contains all the
 | |
|         software that needs to be in the distribution. During the copying
 | |
|         process, it omits generated files, SVN directories, and any other
 | |
|         "cruft" that's in your build tree. This is done to eliminate the
 | |
|         possibility of huge distribution tarballs that include useless or
 | |
|         irrelevant stuff in them. This is the trickiest part of making the
 | |
|         distribution. Done manually you will either include stuff that
 | |
|         shouldn't be in the distribution or exclude stuff that should. This
 | |
|         step is preceded by the message <tt>Building Distribution Directory
 | |
|         LLVM-1.7</tt></li>
 | |
|     <li>The distribution directory is then traversed and all <tt>CVS</tt> or 
 | |
|         <tt>.svn</tt> directories are removed. You see: <tt>Eliminating CVS/.svn
 | |
|         directories from distribution</tt></li>
 | |
|     <li>The recursive <tt>dist-hook</tt> target is executed. This gives each 
 | |
|         directory a chance to modify the distribution in some way (more on this 
 | |
|         below).</li>
 | |
|     <li>The distribution directory is traversed and the correct file
 | |
|         permissions and modes are set based on the type of file.</li>
 | |
|   </ol>
 | |
| 
 | |
|   <p>
 | |
|   To control the process of making the distribution directory correctly, each
 | |
|   Makefile can utilize two features:
 | |
|   </p>
 | |
| 
 | |
|   <ol>
 | |
|     <li><b><tt>EXTRA_DIST</tt></B> - this make variable specifies which files 
 | |
|         it should distribute. By default, all source files are automatically 
 | |
|         included for distribution as well as certain <tt>well known</tt> files 
 | |
|         (see DistAlways variable in Makefile.rules for details). Each Makefile 
 | |
|         specifies, via the <tt>EXTRA_DIST</tt> variable, which additional files 
 | |
|         need to be distributed. Only those files that are needed to build LLVM 
 | |
|         should be added to <tt>EXTRA_DIST</tt>. <tt>EXTRA_DIST</tt> contains a 
 | |
|         list of file or directory names that should be distributed. For example, 
 | |
|         the top level Makefile contains <tt>EXTRA_DIST := test llvm.spec
 | |
|         include</tt>. This means that in addition to regular things that are
 | |
|         distributed at the top level (<tt>CREDITS.txt, LICENSE.txt</tt>, etc.)
 | |
|         the distribution should contain the entire <tt>test</tt> and
 | |
|         <tt>include</tt> directories as well as the <tt>llvm.spec</tt> file.</li>
 | |
|     <li><b><tt>dist-hook</tt></B> - this make target can be used to alter the 
 | |
|         content of the distribution directory. For example, in the top level 
 | |
|         Makefile there is some logic to eliminate files in the <tt>include</tt> 
 | |
|         subtree that are generated by the configure script. These should not be 
 | |
|         distributed. Similarly, any <tt>dist-hook</tt> target found in any 
 | |
|         directory can add or remove or modify things just before it gets
 | |
|         packaged. Any transformation is permitted. Generally, not much is
 | |
|         needed.</li>
 | |
|   </ol>
 | |
| 
 | |
|   <p>
 | |
|   You will see various messages if things go wrong:
 | |
|   </p>
 | |
| 
 | |
|   <ol>
 | |
|     <li>During the copying process, any files that are missing will be flagged 
 | |
|         with: <tt>===== WARNING: Distribution Source 'dir/file' Not Found!</tt>
 | |
|         These must be corrected by either adding the file or removing it from 
 | |
|         <tt>EXTRA_DIST</tt>.</li>
 | |
|     <li>If you build the distribution with <tt>VERBOSE=1</tt>, then you might 
 | |
|         also see: <tt>Skipping non-existent 'dir/file'</tt> in certain cases
 | |
|         where it's okay to skip the file.</li>
 | |
|     <li>The target can fail if any of the things it does fail. Error messages 
 | |
|         should indicate what went wrong.</li>
 | |
|   </ol>
 | |
| </div>
 | |
| 
 | |
| <!-- ======================================================================= -->
 | |
| <div class="doc_subsection">dist</div>
 | |
| <div class="doc_text">
 | |
|   <p>
 | |
|   This target does exactly what <tt>distdir</tt> target does, but also includes
 | |
|   assembling the tarballs. There are actually four related targets here:
 | |
|   </p>
 | |
| 
 | |
|   <ul>
 | |
|     <li><b><tt>dist-gzip</tt></b>: package the gzipped distribution tar 
 | |
|         file. The distribution directory is packaged into a single file ending
 | |
|         in <tt>.tar.gz</tt> which is gzip compressed.</li>
 | |
|     <li><b><tt>dist-bzip2</tt></b>: package the bzip2 distribution tar file. 
 | |
|         The distribution directory is packaged into a single file ending in 
 | |
|         <tt>.tar.bzip2</tt> which is bzip2 compressed.</li>
 | |
|     <li><b><tt>dist-zip</tt></b>: package the zip distribution file. The 
 | |
|         distribution directory is packaged into a single file ending in 
 | |
|         <tt>.zip</tt> which is zip compressed.</li>
 | |
|     <li><b><tt>dist</tt></b>: does all three, dist-gzip, dist-bzip2,
 | |
|         dist-zip</li>
 | |
|   </ul>
 | |
| </div>
 | |
| 
 | |
| <!-- ======================================================================= -->
 | |
| <div class="doc_subsection">dist-check</div>
 | |
| <div class="doc_text">
 | |
|   <p>
 | |
|   This target checks the distribution. The basic idea is that it unpacks the 
 | |
|   distribution tarball and ensures that it can build. It takes the following 
 | |
|   actions:
 | |
|   </p>
 | |
| 
 | |
|   <ol>
 | |
|     <li>It depends on the <tt>dist-gzip</tt> target which, if it hasn't already 
 | |
|         been built, builds the gzip tar bundle (see dist and distdir
 | |
|         above).</li>
 | |
|     <li>removes any pre-existing <tt>_distcheckdir</tt> at the top level.</li>
 | |
|     <li>creates a new <tt>_distcheckdir</tt> directory at the top level.</li>
 | |
|     <li>creates a <tt>build</tt> subdirectory and an <tt>install</tt> 
 | |
|         subdirectory under <tt>_distcheckdir</tt>.</li>
 | |
|     <li>unzips and untars the release tarball into <tt>_distcheckdir</tt>, 
 | |
|         creating <tt>LLVM-1.7</tt> directory (from the tarball).</li>
 | |
|     <li>in the build subdirectory, it configures with appropriate options to
 | |
|         build from the unpacked source tarball into the <tt>build</tt> directory
 | |
|         with installation in the <tt>install</tt> directory.</li>
 | |
|     <li>runs <tt>make all</tt></li>
 | |
|     <li>runs <tt>make </tt><tt>check</tt></li>
 | |
|     <li>runs <tt>make install</tt></li>
 | |
|     <li>runs <tt>make uninstall</tt></li>
 | |
|     <li>runs <tt>make dist</tt></li>
 | |
|     <li>runs <tt>make clean</tt></li>
 | |
|     <li>runs <tt>make dist-clean</tt></li>
 | |
|   </ol>
 | |
| 
 | |
|   <p>
 | |
|   If it can pass all that, the distribution will be deemed distribution worth y
 | |
|   and you will see:
 | |
|   </p>
 | |
| 
 | |
|   <pre>===== LLVM-1.7.tar.gz Ready For Distribution =====</pre>
 | |
| 
 | |
|   <p>
 | |
|   This means the tarball should then be tested on other platforms and have the
 | |
|   nightly test run against it. If those all pass, THEN it is ready for
 | |
|   distribution.
 | |
|   </p>
 | |
|  
 | |
|   <p>
 | |
|   A note about disk space: using <tt>dist-check</tt> will easily triple the
 | |
|   amount of disk space your build tree is using. You might want to check
 | |
|   available space before you begin.
 | |
|   </p>
 | |
| </div>
 | |
| 
 | |
| <!-- ======================================================================= -->
 | |
| <div class="doc_subsection">dist-clean</div>
 | |
| <div class="doc_text">
 | |
|   <p>
 | |
|   In addition to doing a normal <tt>clean</tt>, this target will clean up the
 | |
|   files and directories created by the distribution targets. In particular the
 | |
|   distribution directory (<tt>LLVM-X.X</tt>), check directory
 | |
|   (<tt>_distcheckdir</tt>), and the various tarballs will be removed. You do
 | |
|   this after the release has shipped and you no longer need this stuff in your
 | |
|   build tree.
 | |
|   </p>
 | |
| </div>
 | |
| 
 | |
| <!-- *********************************************************************** -->
 | |
| <hr>
 | |
| <address>
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| 
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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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