source: postlfs/filesystems/uefi-bootloaders/efivar.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 efivar-download-http "https://github.com/rhboot/efivar/releases/download/&efivar-version;/efivar-&efivar-version;.tar.bz2">
  <!ENTITY efivar-download-ftp  " ">
  <!ENTITY efivar-md5sum        "9f067275c5f7aafdd75bfb364280ac9c">
  <!ENTITY efivar-size          "108 KB">
  <!ENTITY efivar-buildsize     "2.75 MB">
  <!ENTITY efivar-time          "less than 0.1 SBU">
]>

<sect1 id="efivar" xreflabel="efivar-&efivar-version;">
  <?dbhtml filename="efivar.html"?>

  <sect1info>
    <date>$Date: 2021-02-21 03:35:58 +0800 (日, 2021-02-21) $</date>
  </sect1info>

  <title>efivar-&efivar-version;</title>

  <indexterm zone="efivar">
    <primary sortas="a-efivar">efivar</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to efivar</title>

    <para>
      The <application>efivar</application> package provides tools and
      libraries to manipulate EFI variables.
    </para>

    &lfs101_checked;

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

    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Required patch:
          <ulink url="&patch-root;/efivar-&efivar-version;-gcc_9-1.patch"/>
        </para>
      </listitem>
    </itemizedlist>

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

  </sect2>

  <sect2 role="installation">
    <title>Installation of efivar</title>

    <para>
      First, apply a patch to fix an issue building with GCC 9 or later:
    </para>

<screen><userinput>patch -Np1 -i ../efivar-37-gcc_9-1.patch</userinput></screen>

    <para>
      Build <application>efivar</application> with the following commands:
    </para>

<screen><userinput>make CFLAGS="-O2 -Wno-stringop-truncation"</userinput></screen>

    <para>
      The test suite of this package is dangerous.  Running it may trigger
      firmware bugs and make your system unusable without using some special
      hardware to reprogram the firmware.
    </para>

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

<screen role="root"><userinput>make install LIBDIR=/usr/lib BINDIR=/bin</userinput></screen>

    <para>
      Move the shared libraries to <filename class="directory">/lib</filename>,
      and recreate the symlinks in <filename class="directory">/usr/lib</filename>:
    </para>

<screen role="root"><userinput>mv /usr/lib/libefi{boot,var}.so.* /lib &amp;&amp;
ln -sfv ../../lib/$(readlink /usr/lib/libefiboot.so) /usr/lib/libefiboot.so &amp;&amp;
ln -sfv ../../lib/$(readlink /usr/lib/libefivar.so) /usr/lib/libefivar.so
</userinput></screen>

  </sect2>

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

    <para>
      <parameter>CFLAGS="-O2 -Wno-stringop-truncation"</parameter>:
      This option overrides the default compiler flags to avoid a build failure.
    </para>

    <para>
      <parameter>LIBDIR=/usr/lib</parameter>:
      This option overrides the default library directory of the package
      (<filename class="directory">/usr/lib64</filename>, which is not used
      by LFS.)
    </para>

    <para>
      <parameter>BINDIR=/bin</parameter>:
      Make <command>efivar</command> avaliable even if
      <filename class="directory">/usr</filename> is offline.
    </para>
  </sect2>

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

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

      <seglistitem>
        <seg>
          efivar
        </seg>
        <seg>
          libefiboot.so and libefivar.so
        </seg>
        <seg>
          /usr/include/efivar
        </seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="efivar-prog">
        <term><command>efivar</command></term>
        <listitem>
          <para>
            is a tool to manipulate UEFI variables
          </para>
          <indexterm zone="efivar efivar-prog">
            <primary sortas="b-efivar">efivar</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libefiboot">
        <term><filename class="libraryfile">libefiboot.so</filename></term>
        <listitem>
          <para>
            is a library used by <command>efibootmgr</command>
          </para>
          <indexterm zone="efivar libefiboot">
            <primary sortas="c-libefiboot">libefiboot.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libefivar">
        <term><filename class="libraryfile">libefivar.so</filename></term>
        <listitem>
          <para>
            is a library for the manipulation of EFI variables
          </para>
          <indexterm zone="efivar libefiboot">
            <primary sortas="c-libefiboot">libefiboot.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>