| <!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-gcc4.2</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-4.2/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-4.2/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-4.2/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-gcc4.2-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-releases for testing. | 
 |   </p> | 
 | </div> | 
 |  | 
 | <!-- ======================================================================= --> | 
 | <div class="doc_subsection"><a name="test">LLVM Test Suite</a></div> | 
 | <div class="doc_text"> | 
 |   <p> | 
 |   Run the <tt>llvm-test</tt> suite and ensure there are no unacceptable | 
 |   failures. Unacceptable failures are regression from the previous release | 
 |   and (optionally) major performance regressions from the previous release.  | 
 |   If a regression is found a bug is filled, but the pre-releases may still go | 
 |   out.</p> | 
 | </div> | 
 |  | 
 | <!-- ======================================================================= --> | 
 | <div class="doc_subsection"><a name="rpm">Building RPM packages (optional)</a></div> | 
 | <div class="doc_text"> | 
 |   <p> | 
 |   You can, optionally, create source and binary RPM packages for LLVM. These may | 
 |   make it easier to get LLVM into a distribution. This can be done with the | 
 |   following commands: | 
 |   </p> | 
 |  | 
 | <div class="doc_code"> | 
 | <pre> | 
 | make dist        # Build the distribution source tarball | 
 | make dist-check  # Check that the source tarball can build itself. | 
 | cp llvm-M.m.tar.gz /usr/src/redhat/SOURCES  # Required by rpmbuild | 
 | make srpm # for source rpm | 
 | make rpm  # for binary rpm | 
 | </pre> | 
 | </div> | 
 |  | 
 |   <p> | 
 |   First, use <tt>make dist</tt> to simply build the distribution. Any failures | 
 |   need to be corrected (on the branch). Once <tt>make dist</tt> can be | 
 |   successful, do <tt>make dist-check</tt>. This target will do the same thing as | 
 |   the 'dist' target but also test that distribution to make sure it can build | 
 |   itself and runs <tt>make check</tt> as well. This ensures that needed files | 
 |   are not missing and that the src tarball can be successfully unpacked, built, | 
 |   installed, and cleaned. Once you have a reliable tarball, you need to copy it | 
 |   to the <tt>/usr/src/redhat/SOURCES</tt> directory which is a requirement of | 
 |   the rpmbuild tool. The last two <tt>make</tt> invocations just run rpmbuild to | 
 |   build either a source (<tt>srpm</tt>) or binary (<tt>rpm</tt>) RPM package. | 
 |   </p> | 
 | </div> | 
 |  | 
 | <!-- ======================================================================= --> | 
 | <div class="doc_subsection"><a name="prerelease">Pre-Release Testing</a></div> | 
 | <div class="doc_text"> | 
 |   <p> | 
 |   Once all testing has been completed and appropriate bugs filed, the pre-release | 
 |   tar balls may be put on the website and the LLVM community is notified. Ask that | 
 |   all LLVM developers test the release in 2 ways:</p> | 
 |   <ol> | 
 |   <li>Download llvm-X.X, llvm-test-X.X, and the appropriate llvm-gcc4 binary.  | 
 |   Run "make check" and the full llvm-test suite (make TEST=nightly report).<li> | 
 |   <li>Download llvm-X.X, llvm-test-X.X, and the llvm-gcc4 source. Compile  | 
 |   everything. Run "make check" and the full llvm-test suite (make TEST=nightly  | 
 |   report).</li> | 
 |   </ol> | 
 |   <p>Ask LLVM developers to submit the report and make check results to the list. | 
 |   Verify that there are no regressions from the previous release. For | 
 |   unsupported targets, verify that make check at least is clean.</p> | 
 |    | 
 |   <p>The first round of pre-release testing will be the longest. During this time, | 
 |   all regressions must be fixed before the second pre-release is created (repeat | 
 |   steps 4-8).</p> | 
 |    | 
 |   <p>If this is the second round of testing, this is only to ensure the bug fixes | 
 |   previously merged in have not created new major problems. This is not the time | 
 |   to solve additional and unrelated bugs. If no patches are merged in, the release | 
 |   is determined to be ready and the release manager may move onto the next step.</p> | 
 | </div> | 
 |  | 
 |  | 
 | <!-- ======================================================================= --> | 
 | <div class="doc_subsection"><a name="tag">Tag the Release Branch</a></div> | 
 | <div class="doc_text"> | 
 |   <p>Tag the release branch using the following procedure:</p> | 
 | <div class="doc_code"> | 
 | <pre> | 
 | svn copy https://llvm.org/svn/llvm-project/llvm/branches/release_XX \ | 
 |          https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_<i>XX</i> | 
 | svn copy https://llvm.org/svn/llvm-project/llvm-gcc-4.2/branches/release_XX \ | 
 |          https://llvm.org/svn/llvm-project/llvm-gcc-4.2/tags/RELEASE_<i>XX</i> | 
 | svn copy https://llvm.org/svn/llvm-project/test-suite/branches/release_XX \ | 
 |          https://llvm.org/svn/llvm-project/test-suite/tags/RELEASE_<i>XX</i> | 
 | </pre> | 
 | </div> | 
 | </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. Merge both changes from mainline into  | 
 |   the release branch. | 
 |   </p> | 
 | </div> | 
 |  | 
 | <!-- ======================================================================= --> | 
 | <div class="doc_subsection"><a name="updemo">Update the LLVM Demo Page</a></div> | 
 | <div class="doc_text"> | 
 |   <p> | 
 |   The LLVM demo page must be updated to use the new release. This consists of | 
 |   using the llvm-gcc binary and building LLVM. Update the website demo page | 
 |   configuration to use the new release.</p> | 
 | </div> | 
 |  | 
 | <!-- ======================================================================= --> | 
 | <div class="doc_subsection"><a name="webupdates">Update the LLVM Website</a></div> | 
 | <div class="doc_text"> | 
 |   <p> | 
 |   The website must be updated before the release announcement is sent out. Here is | 
 |   what to do:</p> | 
 |   <ol> | 
 |   <li> Check out the <tt>website</tt> module from CVS. </li>  | 
 |   <li> Create a new subdirectory X.X in the releases directory. </li>  | 
 |   <li> Commit the <tt>llvm</tt>, <tt>test-suite</tt>, <tt>llvm-gcc</tt> source,  | 
 |   and <tt>llvm-gcc</tt> binaries in this new directory. </li> | 
 |   <li> Copy and commit the <tt>llvm/docs</tt> and <tt>LICENSE.txt</tt> | 
 |   files into this new directory. The docs should be built with BUILD_FOR_WEBSITE=1.</li> | 
 |   <li> Commit the index.html to the release/X.X directory to redirect (use from previous | 
 |   release. </li> | 
 |   <li> Update the <tt>releases/download.html</tt> file with the new release. </li> | 
 |   <li>Update the <tt>releases/index.html</tt> with the new release and link to  | 
 |   release documentation.</li> | 
 |   <li> Finally, update the main page (<tt>index.html</tt> and sidebar) to | 
 |   point to the new release and release announcement. Make sure this all gets | 
 |   commited back into Subversion.</li> | 
 |   </ol> | 
 | </div> | 
 |  | 
 | <!-- ======================================================================= --> | 
 | <div class="doc_subsection"><a name="announce">Announce the Release</a></div> | 
 | <div class="doc_text"> | 
 |   <p>Have Chris send out the release announcement when everything is finished.</p> | 
 | </div> | 
 |  | 
 | <!-- *********************************************************************** --> | 
 | <div class="doc_section"><a name="dist_targets">Distribution Targets</a></div> | 
 | <!-- *********************************************************************** --> | 
 |  | 
 | <!-- ======================================================================= --> | 
 | <div class="doc_subsection">Overview</div> | 
 | <div class="doc_text"> | 
 |   <p> | 
 |   The first thing you need to understand is that there are multiple make targets | 
 |   to support this feature. Here's an overview, we'll delve into the details | 
 |   later. | 
 |   </p> | 
 |  | 
 |   <ul> | 
 |     <li><b>distdir</b> - builds the distribution directory from which the  | 
 |         distribution will be packaged</li> | 
 |     <li><b>dist</b> - builds each of the distribution tarballs (tar.gz,  | 
 |         tar.bzip2, .zip). These can be built individually as well, with separate | 
 |         targets.</li> | 
 |     <li><b>dist-check</b> - this is identical to <tt>dist</tt> but includes a | 
 |         check on the distribution that ensures the tarball can: unpack | 
 |          successfully, compile correctly, pass '<tt>make check</tt>', and pass | 
 |          '<tt>make clean</tt>'.</li> | 
 |     <li><b>dist-clean</b>- this just does a normal clean but also cleans up the | 
 |         stuff generated by the other three <tt>dist</tt> targets (above).</li> | 
 |   </ul> | 
 |  | 
 |   <p> | 
 |   Okay, that's the basic functionality. When making a release, we want to ensure | 
 |   that the tree you build the distribution from passes | 
 |   <tt>dist-check</tt>. Beyond fixing the usual bugs, there is generally one | 
 |   impediment to making the release in this fashion: missing files. The | 
 |   <tt>dist-check</tt> process guards against that possibility. It will either | 
 |   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  | 
 |   which the tarballs are generated. The distribution directory has the same  | 
 |   name as the release, e.g. LLVM-1.7). This target goes through the following  | 
 |   process: | 
 |   </p> | 
 |  | 
 |   <ol> | 
 |     <li>First, if there was an old distribution directory (for the current  | 
 |         release), it is removed in its entirety and you see <tt>Removing old  | 
 |         LLVM-1.7</tt></li> | 
 |     <li>Second, it issues a <tt>make all ENABLE_OPTIMIZED=3D1</tt> to ensure  | 
 |         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> | 
 |   <a href="http://jigsaw.w3.org/css-validator/check/referer"><img | 
 |   src="http://jigsaw.w3.org/css-validator/images/vcss-blue" alt="Valid CSS"></a> | 
 |   <a href="http://validator.w3.org/check/referer"><img | 
 |   src="http://www.w3.org/Icons/valid-html401-blue" alt="Valid HTML 4.01"></a> | 
 |   <a href="http://llvm.cs.uiuc.edu">The LLVM Compiler Infrastructure</a> | 
 |   <br> | 
 |   Last modified: $Date$ | 
 | </address> | 
 | </body> | 
 | </html> |