source: archive/llvm3.xml@ 3f2db3a6

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!-- for the moment, this is internally llvm-old but visibly llvm3
   so that when rust eventually understands a less-old version the
   visible fields, and the page itself, can be moved to that newer
   number -->
  <!ENTITY llvm-old-download-http "http://llvm.org/releases/&llvm-old-version;/llvm-&llvm-old-version;.src.tar.xz">
  <!ENTITY llvm-old-download-ftp  " ">
  <!ENTITY llvm-old-md5sum        "3259018a7437e157f3642df80f1983ea">
  <!ENTITY llvm-old-size          "18 MB">
  <!ENTITY llvm-old-buildsize     "663 MB (112 MB installed) plus 101 MB for the testsuite">
  <!ENTITY llvm-old-time          "6.9 SBU (plus 1.8 SBU for the testsuite, both with parallelism=4)">
]>

<sect1 id="llvm-old" xreflabel="LLVM-&llvm-old-version;">
  <?dbhtml filename="llvm-old.html"?>


  <title>LLVM-&llvm-old-version;</title>

  <indexterm zone="llvm-old">
    <primary sortas="a-llvm3">LLVM3</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to llvm3</title>

    <para>
      This is an old version of <application>llvm</application>, installed
      in /opt so that <xref linkend="rust"/> can use it. For normal use you
      should install <xref linkend="llvm"/>.
    </para>

    <para>
      This version of the <application>LLVM</application> package contains old
      versions of the libraries, using the API which
      <application>Rust</application> expects. Although <xref linkend="rust"/>
      ships with a version of LLVM-3.9 and will build and link to it statically,
      its <application>rustbuild</application> build-system will always compile
      a large number of cross-compilers for different architectures. Using a
      separate LLVM avoids that.
    </para>

    <para>
      By using a separate <application>LLVM-3.9.1</application> it will be
      possible to save time when upgrading <application>Rust</application> (the
      overall time for the first build will be similar both with and without
      separate <application>LLVM-3.9.1</application>).
    </para>

    &lfs80_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&llvm-old-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&llvm-old-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &llvm-old-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &llvm-old-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &llvm-old-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &llvm-old-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">llvm3 Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="cmake"/>
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="python2"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="doxygen"/>,
      <xref linkend="graphviz"/>,
      <xref linkend="libffi"/> (if you force this to be
      used, the build of <xref linkend="rust"/> will need to be altered)
      <xref linkend="libxml2"/>,
      <xref linkend="texlive"/> (or <xref linkend="tl-installer"/>),
      <xref linkend="valgrind"/>,
      <xref linkend="zip"/>,
      <ulink url="http://www.ocaml.org/">OCaml</ulink>, and
      <ulink url="https://pypi.python.org/pypi/Sphinx">Sphinx</ulink>
    </para>

    <para condition="html" role="usernotes">
      User Notes: <ulink url="&blfs-wiki;/llvm3"/>
    </para>
  </sect2>

  <sect2 role="installation">
    <title>Installation of llvm3</title>

    <para>
      Install <application>llvm3</application> by running the following
      commands:
    </para>

<screen><userinput>mkdir -v build                           &amp;&amp;
cd       build                           &amp;&amp;

CC=gcc CXX=g++                           \
cmake -DCMAKE_INSTALL_PREFIX=/opt/llvm3  \
      -DCMAKE_BUILD_TYPE=Release         \
      -DLLVM_BUILD_LLVM_DYLIB=ON         \
      -DLLVM_LINK_LLVM_DYLIB=ON          \
      -DLLVM_TARGETS_TO_BUILD="host"     \
      -DLLVM_INSTALL_UTILS=ON            \
      -Wno-dev ..                        &amp;&amp;
make</userinput></screen>

    <para>
      To test the results, issue: <command>make check-all</command>. The tests
      are run using the maximum number of processors/threads available, but the
      main part of the added time is spent compiling the test programs. This
      works fine with parallel make.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>echo "/opt/llvm3/lib" >> /etc/ld.so.conf &amp;&amp;
make install                             &amp;&amp;
/sbin/ldconfig                           &amp;&amp;
ln -sfv /opt/llvm3/bin/FileCheck /usr/bin</userinput></screen>

    <para>
      Building the documentation for <emphasis>current</emphasis> LLVM is
      covered in <xref linkend="llvm"/>, building docs for this old version
      would be similar, but almost everyone who needs this old version will
      also need the current version for <xref linkend="mesa"/> so it is
      redundant to install the docs here.
    </para>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <parameter>-DLLVM_INSTALL_UTILS_=ON</parameter>: This switch enables
      the installation of old utility programs. Of those,
      <application>rust</application> looks for <command>FileCheck</command>
      when its configure checks for a system LLVM, the others are not used.
    </para>

    <para>
      <parameter>/sbin/ldconfig</parameter>: This ensures the libraries can be
      found.
    </para>

    <para>
      <parameter>ln -sfv /opt/llvm3/bin/FileCheck /usr/bin</parameter>: This
      ensures that FileCheck can be found by <application>rust</application>
      even though <filename class="directory">/opt/llvm3/bin</filename> is not
      on the PATH (having two versions of <application>LLVM</application>
      generally available has been known to cause pain).
    </para>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Program(s)</segtitle>
      <segtitle>Installed Librar(y,ies)</segtitle>
      <segtitle>Installed Director(y,ies)</segtitle>

      <seglistitem>
        <seg>
          bugpoint, count, FileCheck,
          llc, lli, llvm-ar, llvm-as, llvm-bcanalyzer, llvm-config, llvm-cov,
          llvm-c-test, llvm-cxxdump, llvm-diff, llvm-dis, llvm-dsymutil,
          llvm-dwarfdump, llvm-dwp, llvm-extract, llvm-lib (symlink to
          llvm-ar), llvm-link, llvm-lto, llvm-mc, llvm-mcmarkup, llvm-nm,
          llvm-objdump, llvm-pdbdump, llvm-profdata, llvm-ranlib (symlink to
          llvm-ar), llvm-readobj, llvm-rtdyld, llvm-size, llvm-split,
          llvm-stress, llvm-symbolizer, llvm-tblgen, not, obj2yaml, opt, sancov,
          sanstats, verify-uselistorder, yaml-bench and yaml2obj
        </seg>
        <seg>
          BugpointPasses.so,  LLVMHello.so, libLLVM.so, libLLVM*.a (50
          libraries), libLTO.so
        </seg>
        <seg>
          /opt/llvm3
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="FileCheck">
        <term><command>FileCheck</command></term>
        <listitem>
          <para>
            reads two files (one from standard input,the other specified on the
            command line) and uses one to verify the other.
          </para>
          <indexterm zone="llvm-old FileCheck">
            <primary sortas="b-FileCheck">FileCheck</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

    <para>
      For details of the other items in this package, see <xref linkend="llvm"/>.
    </para>

  </sect2>
</sect1>