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<?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;
]>
<sect1 id="pre-hostreqs">
<?dbhtml filename="hostreqs.html"?>
<title>Host System Requirements</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><package-name>-devel</quote> or
<quote><package-name>-dev</quote>. Be sure to install those if
your distribution provides them.</para>
<para>Earlier versions of the listed software packages may work, but has 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-2.17</emphasis> (Versions
greater than &binutils-version; are not recommended as they have
not been tested)</para>
</listitem>
<listitem>
<para><emphasis role="strong">Bison-2.3</emphasis> (/usr/bin/yacc
should be a link to bison or small script that executes bison)</para>
</listitem>
<listitem>
<para><emphasis role="strong">Bzip2-1.0.4</emphasis></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-3.1.5</emphasis> (/usr/bin/awk
should be a link to gawk)</para>
</listitem>
<listitem>
<para><emphasis role="strong">Gcc-4.1.2</emphasis> (Versions
greater than &gcc-version; are not recommended as they have not
been tested)</para>
</listitem>
<listitem>
<para><emphasis role="strong">Glibc-2.5.1</emphasis> (Versions
greater than &glibc-version; are not recommended as they have
not been tested)</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">Linux Kernel-2.6.25</emphasis>
(having been compiled with GCC-4.1.2 or greater)</para>
<para>The reason for the kernel version requirement is that we specify
that version when building <application>glibc</application> in Chapter 6
at the recommendation of the developers. It is also required by
udev.</para>
<para>If the host kernel is either earlier than 2.6.25, or it was not
compiled using a GCC-4.1.2 (or later) compiler, you will need to replace
the kernel with one adhering to the specifications. There are two ways
you can go about this. First, see if your Linux vendor provides a 2.6.25
or later kernel package. If so, you may wish to install it. If your
vendor doesn't offer an acceptable kernel package, or you would prefer not to
install it, you can compile a kernel yourself. Instructions for
compiling the kernel and configuring the boot loader (assuming the host
uses GRUB) are located in <xref linkend="chapter-bootable"/>.</para>
</listitem>
<listitem>
<para><emphasis role="strong">M4-1.4.10</emphasis></para>
</listitem>
<listitem>
<para><emphasis role="strong">Make-3.81</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">Sed-4.1.5</emphasis></para>
</listitem>
<listitem>
<para><emphasis role="strong">Tar-1.18</emphasis></para>
</listitem>
<!-- Needed by the apparently broken Binutils-2.18 -->
<listitem>
<para><emphasis role="strong">Texinfo-4.9</emphasis></para>
</listitem>
<listitem>
<para><emphasis role="strong">Xz-5.0.3</emphasis></para>
</listitem>
</itemizedlist>
<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>
<para id="version-check">To see whether your host system has all the appropriate versions, and
the ability to compile programs, run the following:</para>
<!--<anchor xreflabel="Version Check Script" id="version-check"/>-->
<screen role="nodump"><userinput>cat > version-check.sh << "EOF"
<literal>#!/bin/bash
export LC_ALL=C
# Simple script to list version numbers of critical development tools
bash --version | head -n1 | cut -d" " -f2-4
echo "/bin/sh -> `readlink -f /bin/sh`"
echo -n "Binutils: "; ld --version | head -n1 | cut -d" " -f3-
bison --version | head -n1
if [ -e /usr/bin/yacc ];
then echo "/usr/bin/yacc -> `readlink -f /usr/bin/yacc`";
else echo "yacc not found"; fi
bzip2 --version 2>&1 < /dev/null | head -n1 | cut -d" " -f1,6-
echo -n "Coreutils: "; chown --version | head -n1 | cut -d")" -f2
diff --version | head -n1
find --version | head -n1
gawk --version | head -n1
if [ -e /usr/bin/awk ];
then echo "/usr/bin/awk -> `readlink -f /usr/bin/awk`";
else echo "awk not found"; fi
gcc --version | head -n1
ldd --version | head -n1 | cut -d" " -f2- # glibc version
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`
sed --version | head -n1
tar --version | head -n1
echo "Texinfo: `makeinfo --version | head -n1`"
xz --version | head -n1
echo 'main(){}' > dummy.c && gcc -o dummy dummy.c
if [ -x dummy ]; then echo "gcc compilation OK";
else echo "gcc compilation failed"; fi
rm -f dummy.c dummy
</literal>
EOF
bash version-check.sh</userinput></screen>
</sect1>
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