source: archive/gcc-java.xml@ 45ab6c7

<?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;

  <!ENTITY gcc-java-download-http  "http://ftpmirror.gnu.org/gcc/gcc-&gcc-java-version;/gcc-&gcc-java-version;.tar.bz2">
  <!ENTITY gcc-java-download-ftp   "ftp://ftp.gnu.org/gnu/gcc/gcc-&gcc-java-version;/gcc-&gcc-java-version;.tar.bz2">
  <!ENTITY gcc-java-md5sum         "6bf56a2bca9dac9dbbf8e8d1036964a8">
  <!ENTITY gcc-java-size           "80 MB">
  <!ENTITY gcc-java-buildsize      "4.5 GB">
  <!ENTITY gcc-java-time           "34 SBU (with tests and parallelism=4)">

<!-- ecj-latest points to 4.5 while ecj-4.9 is available -->
  <!ENTITY ecj-download-ftp    "ftp://sourceware.org/pub/java/ecj-4.9.jar">

  <!ENTITY antlr-version       "4.6">
  <!ENTITY antlr-download-http "http://www.antlr.org/download/antlr-&antlr-version;-complete.jar">
]>

<sect1 id="gcc-java" xreflabel="GCC-Java-&gcc-java-version;">
  <?dbhtml filename="gcc-java.html" ?>

  <sect1info>
    <date>$Date$</date>
  </sect1info>

  <title>GCC-Java-&gcc-java-version;</title>

  <indexterm zone="gcc-java">
    <primary sortas="a-gcc-java">GCC-Java-&gcc-java-version;</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to GCC-Java</title>

    <para>
      See the introduction to the Java language and system at
      <xref linkend="java"/>. The GNU Compiler Collection (GCC) contains
      a Java compiler to native code. Together with the
      <application>ecj</application> Java compiler from Eclipse (to bytecode),
      it provides a way to build an acceptable JVM from source. However, since
      the release of <application>OpenJDK</application>, the development
      of GCC-Java has almost stopped, and the built JVM is an old version,
      which cannot be used for building <xref linkend="openjdk"/>.
    </para>

    &lfs80_checked;

    <caution>
      <para>
        Using the instructions on this page will have the effect that
        the C and C++ compiler and libraries will be reinstalled, overwriting
        the ones on your system. This may lead to some issues. Please read the
        note and caution on the <xref linkend="gcc"/> page.
      </para>
    </caution>

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

    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Eclipse Java compiler: <ulink url="&ecj-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          ANTLR binary, for building <command>gjdoc</command> (optional):
          <ulink url="&antlr-download-http;"/>
        </para>
      </listitem>
<!--      <listitem>
        <para>
          Required patch:
          <ulink url="&patch-root;/gcc-&gcc-java-version;-upstream_fixes-1.patch"/>
        </para>
      </listitem>-->
    </itemizedlist>

    <bridgehead renderas="sect3">GCC Java Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="unzip"/>,
      <xref linkend="which"/>, and
      <xref linkend="zip"/>
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="dejagnu"/>, for tests
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="gtk2"/> and
      <ulink url="https://download.gnome.org/sources/libart_lgpl/">
        Libart
      </ulink> for building the AWT peer
    </para>

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

  </sect2>

  <sect2 role="installation">
    <title>Installation of GCC Java</title>

    <para>
      The instructions below assume that the C and C++ compilers have
      the same version as the one you are installing, so that a
      <quote>bootstrap</quote> is not necessary. If you are upgrading
      the GCC version, then remove the <option>--disable-bootstrap</option> from
      the <command>./configure</command> options below.
    </para>

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

<screen><userinput>case $(uname -m) in
  x86_64)
    sed -e '/m64=/s/lib64/lib/' \
        -i.orig gcc/config/i386/t-linux64
  ;;
esac

sed -i 's/\(install.*:\) install-.*recursive/\1/' libffi/Makefile.in         &amp;&amp;
sed -i 's/\(install-data-am:\).*/\1/'             libffi/include/Makefile.in &amp;&amp;
sed -i 's/absolute/file normalize/' libjava/testsuite/lib/libjava.exp &amp;&amp;
sed -i 's/major.*1000.*minor/major/' gcc/java/decl.c &amp;&amp;

cp ../ecj-4.9.jar ./ecj.jar &amp;&amp;

mkdir build &amp;&amp;
cd    build &amp;&amp;

../configure                     \
    --prefix=/usr                \
    --disable-multilib           \
    --with-system-zlib           \
    --disable-bootstrap          \
    --enable-java-home           \
    --with-jvm-root-dir=/opt/gcj \
    --with-antlr-jar=$(pwd)/../../antlr-&antlr-version;-complete.jar \
    --enable-languages=java &amp;&amp;
make</userinput></screen>

    <para>
      If you have installed additional packages such as
      <application>Valgrind</application> and <application>GDB</application>,
      the <application>GCC</application> part of the testsuite will run more
      tests than in LFS. Some of those will report FAIL and others XPASS
      (pass when expected to FAIL). To run the tests, issue:
    </para>

<screen><userinput>ulimit -s 32768 &amp;&amp;
make -k check</userinput></screen>
<!-- The command above may error out, so using && may prevent the summary
to be run. -->

    <para>
      The tests are very long, and the results may be hard to find in the
      logs, specially if you use job control with make. You can get a summary
      of the tests with:
    </para>

<screen><userinput>../contrib/test_summary</userinput></screen>

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

<screen role="root"><userinput>make install &amp;&amp;

mkdir -pv /usr/share/gdb/auto-load/usr/lib              &amp;&amp;
mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib &amp;&amp;

chown -v -R root:root \
    /usr/lib/gcc/*linux-gnu/&gcc-java-version;/include{,-fixed} &amp;&amp;

gcj -o ecj ../../ecj-4.9.jar \
    --main=org.eclipse.jdt.internal.compiler.batch.Main &amp;&amp;
mv ecj /usr/bin &amp;&amp;
ln -sfv ../../../usr/bin/ecj /opt/gcj/bin/javac</userinput></screen>

  </sect2>

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

    <para>
      The first two <command>sed</command> commands prevent the
      installation of the <application>libffi</application> library bundled
      with <application>GCC</application>, since it is outdated compared to
      <xref linkend="libffi"/>.
    </para>

    <para>
      The next two <command>sed</command> commands implement upstream fixes
      to the <application>GCC Java</application> compiler and tests.
    </para>

    <para>
      <command>mkdir build; cd build</command>: The
      <application>GCC</application> documentation recommends
      building the package in a dedicated build directory.
    </para>

    <para>
      <parameter>--disable-multilib</parameter>: This parameter ensures
      that files are created for the specific architecture of your computer.
    </para>

    <para>
      <parameter>--with-system-zlib</parameter>: Uses the system
      <application>zlib</application> instead of the bundled one.
    </para>

    <para>
      <parameter>--disable-bootstrap</parameter>: Prevents the C and C++
      compilers to recompile themselves. You should use this switch only
      if the installed C and C++ compilers are the same version as the
      ones you install.
    </para>

    <para>
      <parameter>--enable-java-home</parameter>: Creates a directory
      layout similar to that of a JVM.
    </para>

    <para>
      <parameter>--with-jvm-root-dir=/opt/gcj</parameter>: Installs
      the JVM in the specified location.
    </para>

    <para>
      <parameter>--with-antlr-jar=...</parameter>: Specifies the location of
      <application>ANTLR</application>, which is needed to build
      <command>gjdoc</command>. Remove if you have not downloaded antlr.
    </para>

    <para>
      <parameter>--enable-languages=java</parameter>:
      This command identifies which language to build. Note it is unavoidable
      that the <application>C</application> and <application>C++</application>
      compilers be built too.
    </para>

    <para>
      <option>--enable-java-awt=gtk</option>: Allows to build the Java AWT
      <application>GTK+2</application> peer. Needed to have a fully functional
      JVM.
    </para>

    <para>
      <command>ulimit -s 32768</command>: This command prevents several
      tests from running out of stack space.
    </para>

    <para>
      <command>make -k check</command>: This command runs the test suite
      without stopping if any errors are encountered.
    </para>

    <para>
      <command>../contrib/test_summary</command>: This
      command will produce a summary of the test suite results. You can append
      <command>| grep -A7 Summ</command> to the command to produce an even more
      condensed version of the summary. You may also wish to redirect the output
      to a file for review and comparison later on.
    </para>

    <para>
      <command>chown -v -R root:root
      /usr/lib/gcc/*linux-gnu/...</command>:
      If the package is built by a user other than root, the ownership of the
      installed <filename class="directory">include</filename> directory (and
      its content) will be incorrect. This command changes the ownership to
      the <systemitem class="username">root</systemitem> user and group.
    </para>

    <para>
      <command>gcj -o ecj ...</command>: compiles the eclipse compiler to
      native code, which is much faster than bytecode. This compiler is
      then used as a <command>javac</command> replacement in the JVM.
    </para>

  </sect2>

  <sect2 role="configuration">
    <title>Configuring GCC-Java</title>

    <sect3>
      <title>Configuration Information</title>

      <para>
        The configuration is the same as <xref linkend="ojdk-conf"/>,
        replacing <filename class="directory">/opt/jdk</filename> with
        <filename class="directory">/opt/gcj</filename>.
      </para>

    </sect3>

  </sect2>

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

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          aot-compile, ecj, gappletviewer, gc-analyze, gcj, gcj-dbtool,
          gcjh, gij, gjar, gjarsigner, gjavah, gjdoc, gkeytool, gnative2ascii,
          gorbd, grmic, grmid, grmiregistry, gserialver, gtnameserv, jcf-dump,
          jv-convert, rebuild-gcj-db. Symbolic links to these files are located
          in <filename class="directory">/opt/gcj/bin</filename>
        </seg>
        <seg>
          libgcj_bc.so, libgcj.so, libgcj-tools.so, and libgij.so
        </seg>
        <seg>
          /usr/include/c++/&gcc-java-version;/{gcj,gnu,java,javax,org,sun},
          /usr/lib/gcj-&gcc-java-version;-17, /usr/lib/jvm-exports,
          /usr/lib/security, /opt/gcj, and /usr/share/java
        </seg>
      </seglistitem>
    </segmentedlist>

    <para>
      Some programs, libraries, and descriptions are not listed here,
      but can be found at
      <ulink url="&lfs-root;/chapter06/gcc.html#contents-gcc"/> as they were
      initially installed during the building of LFS.
    </para>

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

      <varlistentry id="aot-compile">
        <term><command>aot-compile</command></term>
        <listitem>
          <para>
            searches a directory for Java bytecode and uses
            <command>gcj</command> to compile it to native code.
          </para>
          <indexterm zone="gcc-java aot-compile">
            <primary sortas="b-aot-compile">aot-compile</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="ecj">
        <term><command>ecj</command></term>
        <listitem>
          <para>
            is the Eclipse Java compiler.
          </para>
          <indexterm zone="gcc-java ecj">
            <primary sortas="b-ecj">ecj</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gappletviewer">
        <term><command>gappletviewer</command></term>
        <listitem>
          <para>
            loads and run a <application>Java</application> applet.
          </para>
          <indexterm zone="gcc-java gappletviewer">
            <primary sortas="b-gappletviewer">gappletviewer</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gc-analyze">
        <term><command>gc-analyze</command></term>
        <listitem>
          <para>
            analyzes garbage collector (GC) memory dumps from
            <application>Java</application> code.
          </para>
          <indexterm zone="gcc-java gc-analyze">
            <primary sortas="b-gc-analyze">gc-analyze</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gcj">
        <term><command>gcj</command></term>
        <listitem>
          <para>
            is an ahead-of-time compiler for the <application>Java</application>
            language.
          </para>
          <indexterm zone="gcc-java gcj">
            <primary sortas="b-gcj">gcj</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gcj-dbtool">
        <term><command>gcj-dbtool</command></term>
        <listitem>
          <para>
            is a tool for creating and manipulating class file mapping databases.
          </para>
          <indexterm zone="gcc-java gcj-dbtool">
            <primary sortas="b-gcj-dbtool">gcj-dbtool</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gcjh">
        <term><command>gcjh</command></term>
        <listitem>
          <para>
            generates header files from <application>Java</application> class files.
          </para>
          <indexterm zone="gcc-java gcjh">
            <primary sortas="b-gcjh">gcjh</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gij">
        <term><command>gij</command></term>
        <listitem>
          <para>
            is the GNU interpreter for <application>Java</application> bytecode.
          </para>
          <indexterm zone="gcc-java gij">
            <primary sortas="b-gij">gij</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gjar">
        <term><command>gjar</command></term>
        <listitem>
          <para>
            is an (partial) implementation of the <command>jar</command>
            utility that comes with Sun's JDK.
          </para>
          <indexterm zone="gcc-java gjar">
            <primary sortas="b-gjar">gjar</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gjarsigner">
        <term><command>gjarsigner</command></term>
        <listitem>
          <para>
            is a Java ARchive (JAR) file signing and verification tool.
          </para>
          <indexterm zone="gcc-java gjarsigner">
            <primary sortas="b-gjarsigner">gjarsigner</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gjavah">
        <term><command>gjavah</command></term>
        <listitem>
          <para>
            generates header files from Java class files.
          </para>
          <indexterm zone="gcc-java gjavah">
            <primary sortas="b-gjavah">gjavah</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gjdoc">
        <term><command>gjdoc</command></term>
        <listitem>
          <para>
            is a documentation tool similar to <command>javadoc</command>.
          </para>
          <indexterm zone="gcc-java gjdoc">
            <primary sortas="b-gjdoc">gjdoc</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gkeytool">
        <term><command>gkeytool</command></term>
        <listitem>
          <para>
            manages private keys and public certificates in a
            <application>Java</application> environment.
          </para>
          <indexterm zone="gcc-java gkeytool">
            <primary sortas="b-gkeytool">gkeytool</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gnative2ascii">
        <term><command>gnative2ascii</command></term>
        <listitem>
          <para>
            is an encoding converter for <application>Java</application>.
          </para>
          <indexterm zone="gcc-java gnative2ascii">
            <primary sortas="b-gnative2ascii">gnative2ascii</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gorbd">
        <term><command>gorbd</command></term>
        <listitem>
          <para>
            is an object request broker daemon.
          </para>
          <indexterm zone="gcc-java gorbd">
            <primary sortas="b-gorbd">gorbd</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="grmic-gcc">
        <term><command>grmic</command></term>
        <listitem>
          <para>
            generates stubs for Remote Method Invocation.
          </para>
          <indexterm zone="gcc-java grmic-gcc">
            <primary sortas="b-grmic">grmic</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="grmid-gcc">
        <term><command>grmid</command></term>
        <listitem>
          <para>
            RMI activation system daemon.
          </para>
          <indexterm zone="gcc-java grmid-gcc">
            <primary sortas="b-grmid">grmid</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="grmiregistry-gcc">
        <term><command>grmiregistry</command></term>
        <listitem>
          <para>
            starts a remote object registry on the current host.
          </para>
          <indexterm zone="gcc-java grmiregistry-gcc">
            <primary sortas="b-grmiregistry">grmiregistry</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gserialver">
        <term><command>gserialver</command></term>
        <listitem>
          <para>
            prints the serialVersionUID of the specified class.
          </para>
          <indexterm zone="gcc-java gserialver">
            <primary sortas="b-gserialver">gserialver</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gtnameserv">
        <term><command>gtnameserv</command></term>
        <listitem>
          <para>
            starts a naming service.
          </para>
          <indexterm zone="gcc-java gtnameserv">
            <primary sortas="b-gtnameserv">gtnameserv</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="jcf-dump">
        <term><command>jcf-dump</command></term>
        <listitem>
          <para>
            prints information about <application>Java</application>
            class files.
          </para>
          <indexterm zone="gcc-java jcf-dump">
            <primary sortas="b-jcf-dump">jcf-dump</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="jv-convert">
        <term><command>jv-convert</command></term>
        <listitem>
          <para>
            converts files from one encoding to another.
          </para>
          <indexterm zone="gcc-java jv-convert">
            <primary sortas="b-jv-convert">jv-convert</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="rebuild-gcj-db">
        <term><command>rebuild-gcj-db</command></term>
        <listitem>
          <para>
            Merge the per-solib databases made by
            <application>aot-compile</application> into one system-wide
            database.
          </para>
          <indexterm zone="gcc-java rebuild-gcj-db">
            <primary sortas="b-rebuild-gcj-db">rebuild-gcj-db</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>