source: chapter02/hostreqs.xml@ 5c3ffcb9

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  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../general.ent">
  %general-entities;
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<sect1 id="ch-partitioning-hostreqs" xreflabel="Host System Requirements">
  <?dbhtml filename="hostreqs.html"?>

  <title>Host System Requirements</title>

  <sect2>
     <title>Hardware</title>

     <para>The LFS editors recommend that the system CPU have at least
     four cores and that the system have at least 8 GB of memory. 

     For the Cross Edition, it's recommended that both the system running
     the host distribution and the target system should meet the
     requirements.

     Older systems that do not meet these requirements will still work,
     but the time to build packages will be significantly longer
     than documented.
  </para>

  </sect2>

  <sect2>
     <title>Software</title>

    <para>Your host system should have the following software with the
    minimum versions indicated. This should not be an issue for most
    modern Linux distributions. Also note that many distributions will
    place software headers into separate packages, often in the form of
    <quote>&lt;package-name&gt;-devel</quote> or
    <quote>&lt;package-name&gt;-dev</quote>. Be sure to install those if
    your distribution provides them.</para>

   <para>Earlier versions of the listed software packages may work, but have
   not been tested.</para>

  <itemizedlist spacing="compact">

    <listitem>
      <para><emphasis role="strong">Bash-3.2</emphasis> (/bin/sh
      should be a symbolic or hard link to bash)</para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Binutils-2.13.1</emphasis> (Versions
      greater than &binutils-version; are not recommended as they have
      not been tested)</para>
    </listitem>

    <listitem>
      <!-- needed to cross build the kernel in chapter 6 -->
      <para><emphasis role="strong">Bc-1.07.0</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Bison-2.7</emphasis> (/usr/bin/yacc
      should be a link to bison or a small script that executes bison)</para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Coreutils-6.9</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Diffutils-2.8.1</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Findutils-4.2.31</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Gawk-4.0.1</emphasis> (/usr/bin/awk
      should be a link to gawk)</para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">GCC-5.1</emphasis> including the C++
      compiler, <command>g++</command> (Versions greater than &gcc-version; are
      not recommended as they have not been tested). C and C++ standard
      libraries (with headers) must also be present so the C++ compiler can
      build hosted programs</para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Grep-2.5.1a</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Gzip-1.3.12</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">M4-1.4.10</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Make-4.0</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Patch-2.5.4</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Perl-5.8.8</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Python-3.4</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Sed-4.1.5</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Tar-1.22</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Texinfo-4.7</emphasis></para>
    </listitem>

    <listitem>
      <para><emphasis role="strong">Xz-5.0.0</emphasis></para>
    </listitem>

  </itemizedlist>

  <important>
    <para>Note that the symlinks mentioned above are required to build an LFS
    system using the instructions contained within this book. Symlinks that
    point to other software (such as dash, mawk, etc.) may work, but are not
    tested or supported by the LFS development team, and may require either
    deviation from the instructions or additional patches to some
    packages.</para>
  </important>

  <!-- Use an empty sect2 element to prevent a pdf warning.  -->
  <bridgehead renderas="sect2"
              id="version-check"
              xreflabel="Host System Requirements">
  </bridgehead>
  <!--<title> </title>-->

  <para >To see whether your host system has all the appropriate versions, and
  the ability to compile programs, run the following commands:</para>

<screen role="nodump"><userinput>cat &gt; version-check.sh &lt;&lt; "EOF"
<literal>#!/bin/bash
# Simple script to list version numbers of critical development tools
export LC_ALL=C
bash --version | head -n1 | cut -d" " -f2-4
MYSH=$(readlink -f /bin/sh)
echo "/bin/sh -&gt; $MYSH"
echo $MYSH | grep -q bash || echo "ERROR: /bin/sh does not point to bash"
unset MYSH

bc --version | head -n1
echo -n "Binutils: "; ld --version | head -n1 | cut -d" " -f3-
bison --version | head -n1

if [ -h /usr/bin/yacc ]; then
  echo "/usr/bin/yacc -> `readlink -f /usr/bin/yacc`";
elif [ -x /usr/bin/yacc ]; then
  echo yacc is `/usr/bin/yacc --version | head -n1`
else
  echo "yacc not found"
fi

echo -n "Coreutils: "; chown --version | head -n1 | cut -d")" -f2
diff --version | head -n1
find --version | head -n1
gawk --version | head -n1

if [ -h /usr/bin/awk ]; then
  echo "/usr/bin/awk -&gt; `readlink -f /usr/bin/awk`";
elif [ -x /usr/bin/awk ]; then
  echo awk is `/usr/bin/awk --version | head -n1`
else
  echo "awk not found"
fi

gcc --version | head -n1
g++ --version | head -n1
grep --version | head -n1
gzip --version | head -n1
cat /proc/version
m4 --version | head -n1
make --version | head -n1
patch --version | head -n1
echo Perl `perl -V:version`
python3 --version
sed --version | head -n1
tar --version | head -n1
makeinfo --version | head -n1  # texinfo version
xz --version | head -n1

echo 'int main(){}' &gt; dummy.c &amp;&amp; g++ -o dummy dummy.c
if [ -x dummy ]
  then echo "g++ compilation OK";
  else echo "g++ compilation failed"; fi
rm -f dummy.c dummy</literal>
EOF

bash version-check.sh</userinput></screen>
<!--
  <para>Also check for some library consistency:</para>

<screen role="nodump"><userinput>cat &gt; library-check.sh &lt;&lt; "EOF"
<literal>#!/bin/bash
for lib in lib{gmp,mpfr,mpc}.la; do
  echo $lib: $(if find /usr/lib* -name $lib|
               grep -q $lib;then :;else echo not;fi) found
done
unset lib</literal>
EOF

bash library-check.sh</userinput></screen>

<para>The files identified by this script should be all present
or all absent, but not only one or two present.</para>
-->
 </sect2>
</sect1>