source: BOOK/cross-tools/x86/gcc-final.xml@ 929aaed

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  "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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  <!ENTITY % patches-entities SYSTEM "../../patches.ent">
  %general-entities;
  %patches-entities;
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<sect1 id="ch-cross-tools-gcc-final" role="wrap">
  <?dbhtml filename="gcc-final.html"?>

  <title>GCC-&gcc-version; - Cross Compiler Final</title>

  <indexterm zone="ch-cross-tools-gcc-final">
    <primary sortas="a-GCC">GCC</primary>
    <secondary>cross tools, final</secondary>
  </indexterm>

  <sect2 role="package">
    <title/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../../final-system/common/gcc.xml"
    xpointer="xpointer(//*[@role='package']/para[1])"/>

    <segmentedlist>
      <segtitle>&buildtime;</segtitle>
      <segtitle>&diskspace;</segtitle>

      <seglistitem>
        <seg>Not checked yet</seg>
        <seg>Not checked yet</seg>
      </seglistitem>
    </segmentedlist>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../../final-system/common/gcc.xml"
    xpointer="xpointer(//*[@role='package']/segmentedlist[2])"/>

  </sect2>

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

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='aa'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='ab'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='ac'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='ad'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='ae'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='af'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='ag'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='ah'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='ai'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='aj'])"/>

    <para os="ba">Now we will disable <command>gcc</command>'s linking to
    <filename class="libraryfile">libc</filename> since it doesn't
    exist yet:</para>

<screen os="bc"><userinput>cp gcc/config/t-slibgcc-elf-ver{,.orig}
sed -e '/^SHLIB_LC = /s@-lc@@' gcc/config/t-slibgcc-elf-ver.orig \
 > gcc/config/t-slibgcc-elf-ver
cp gcc/config/t-libunwind{,.orig}
sed -e '/^SHLIB_LC = /s@-lc@@' gcc/config/t-libunwind.orig \
 > gcc/config/t-libunwind</userinput></screen>

    <para os="bd">Finally, disable <option>-B</option> in <filename>configure</filename>,
    so it doesn't pick up the host's header files:</para>

<screen os="be"><userinput>cp configure{,.orig}
sed -e  '/FLAGS_FOR_TARGET.*\/lib\//s@-B[^ ]*/lib/@@g' configure.orig >configure</userinput></screen>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='ak'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='f'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='g'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="gcc-static.xml"
    xpointer="xpointer(//*[@os='h'])"/>

<screen><userinput>../gcc-&gcc-version;/configure --prefix=/cross-tools \
    --target=${LFS_TARGET} --host=${LFS_HOST} --disable-multilib \
    --with-local-prefix=/tools --disable-nls --enable-shared \
    --enable-languages=c,c++ --enable-__cxa_atexit \
    --enable-c99 --enable-long-long --enable-threads=posix</userinput></screen>

    <variablelist os="bf">
      <title>The meaning of the new configure options:</title>

      <varlistentry os="bf1">
        <term><parameter>--enable-languages=c,c++</parameter></term>
        <listitem>
          <para>This option ensures that only the C and C++ compilers is built.</para>
        </listitem>
      </varlistentry>

      <varlistentry os="bf2">
        <term><parameter>--enable-__cxa_atexit</parameter></term>
        <listitem>
          <para>This option allows use of __cxa_atexit, rather than atexit,
          to register C++ destructors for local statics and global objects
          and is essential for fully standards-compliant handling of destructors.
          It also affects the C++ ABI and therefore results in C++ shared libraries
          and C++ programs that are interoperable with other Linux distributions.</para>
        </listitem>
      </varlistentry>

      <varlistentry os="bf3">
        <term><parameter>--enable-c99</parameter></term>
        <listitem>
          <para>Enable C99 support for C programs.</para>
        </listitem>
      </varlistentry>

      <varlistentry os="bf4">
        <term><parameter>--enable-long-long</parameter></term>
        <listitem>
          <para>Enables long long support in the compiler.</para>
        </listitem>
      </varlistentry>

      <varlistentry os="bf5">
        <term><parameter>--enable-threads=posix</parameter></term>
        <listitem>
          <para>This enables C++ exception handling for multi-threaded code.</para>
        </listitem>
      </varlistentry>

    </variablelist>

    <para>Continue with compiling the package:</para>

<screen><userinput>make AS_FOR_TARGET="/cross-tools/bin/${LFS_TARGET}-as" \
LD_FOR_TARGET="/cross-tools/bin/${LFS_TARGET}-ld"</userinput></screen>

    <para>Install the package:</para>

<screen><userinput>make install</userinput></screen>

  </sect2>

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

    <para>Details on this package are located in <xref
    linkend="contents-gcc" role="."/></para>

  </sect2>

</sect1>