lfs-book/chapter06/grub.xml

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<sect1 id="ch-system-grub" xreflabel="Grub">
<title>Grub-&grub-version;</title>
<?dbhtml filename="grub.html"?>

<indexterm zone="ch-system-grub"><primary sortas="a-Grub">Grub</primary></indexterm>

<para>The Grub package contains the GRand Unified Bootloader.</para>

<screen>&buildtime; 0.2 SBU
&diskspace; 10 MB</screen>

<para>Grub installation depends on: Bash, Binutils, Coreutils, Diffutils,
GCC, Glibc, Grep, Make, Ncurses, Sed.</para>



<sect2>
<title>Installation of Grub</title>

<para>This package is known to behave badly when you have changed its default
optimization flags (including the -march and -mcpu options). Therefore, if you
have defined any environment variables that override default optimizations,
such as CFLAGS and CXXFLAGS, we recommend un-setting them when building
Grub.</para>

<para>First prepare Grub for compilation:</para>

<screen><userinput>./configure --prefix=/usr</userinput></screen>

<para>A few of the files comprising Grub have issues with optimizations done
by GCC 3.4. Compile these few files with known-good optimizations:</para>

<screen><userinput>make -C stage2 STAGE2_CFLAGS=-O2 \
    pre_stage2_exec-builtins.o pre_stage2_exec-serial.o</userinput></screen>

<para>Now compile the rest of the package:</para>

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

<para>To test the results, issue:
<userinput>make check</userinput>.</para>

<para>Now install it:</para>

<screen><userinput>make install
mkdir /boot/grub
cp /usr/share/grub/i386-pc/stage{1,2} /boot/grub</userinput></screen>

<para>Replace <filename class="directory">i386-pc</filename> with whatever
directory is appropriate for your hardware.</para>

<para>The <filename class="directory">i386-pc</filename> directory also
contains a number of <filename>*stage1_5</filename> files, different ones
for different file systems. Have a look at the ones available and copy the
appropriate ones to the <filename class="directory">/boot/grub</filename>
directory. Most people will copy the <filename>e2fs_stage1_5</filename>
and/or <filename>reiserfs_stage1_5</filename> files.</para>

</sect2>


<sect2 id="contents-grub"><title>Contents of Grub</title>

<para><emphasis>Installed programs</emphasis>: grub, grub-install,
grub-md5-crypt, grub-terminfo and mbchk</para>

</sect2>

<sect2><title>Short descriptions</title>

<indexterm zone="ch-system-grub grub"><primary sortas="b-grub">grub</primary></indexterm>
<para id="grub"><command>grub</command> is the GRand Unified Bootloader's command
shell.</para>

<indexterm zone="ch-system-grub grub-install"><primary sortas="b-grub-install">grub-install</primary></indexterm>
<para id="grub-install"><command>grub-install</command> installs GRUB on the given device.</para>

<indexterm zone="ch-system-grub grub-md5-crypt"><primary sortas="b-grub-md5-crypt">grub-md5-crypt</primary></indexterm>
<para id="grub-md5-crypt"><command>grub-md5-crypt</command> encrypts a password in MD5
format.</para>

<indexterm zone="ch-system-grub grub-terminfo"><primary sortas="b-grub-terminfo">grub-terminfo</primary></indexterm>
<para id="grub-terminfo"><command>grub-terminfo</command> generates a terminfo command from a
terminfo name. It can be used if you have an uncommon terminal.</para>

<indexterm zone="ch-system-grub mbchk"><primary sortas="b-mbchk">mbchk</primary></indexterm>
<para id="mbchk"><command>mbchk</command> checks the format of a multi-boot kernel.</para>

</sect2>


</sect1>