| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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| 3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 4 | %general-entities;
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| 5 | ]>
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| 6 | <sect1 id="pre-hostreqs">
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| 7 | <title>Host System Requirements</title>
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| 8 | <?dbhtml filename="hostreqs.html"?>
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| 9 |
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| 10 | <para>The host must be running at least a 2.6.2 kernel compiled with GCC-3.0 or
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| 11 | higher. There are two main reasons for this requirement. First, the Native POSIX
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| 12 | Threading Library (NPTL) test suite will segfault if the host's kernel has not
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| 13 | been compiled with GCC-3.0 or a later version. Secondly, the 2.6.2 or later
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| 14 | version of the kernel is required for the use of Udev. Udev creates devices
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| 15 | dynamically by reading from the <systemitem
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| 16 | class="filesystem">sysfs</systemitem> file system. However, support for this
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| 17 | filesystem has only recently been implemented in most of the kernel drivers. We
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| 18 | must be sure that all critical system devices get created properly.</para>
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| 19 |
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| 20 | <para>In order to determine whether the host kernel meets the
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| 21 | requirements outlined above, run the following command:</para>
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| 22 |
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| 23 | <screen><userinput>cat /proc/version</userinput></screen>
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| 24 |
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| 25 | <para>This will produce output similar to:</para>
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| 26 |
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| 27 | <screen><computeroutput>Linux version 2.6.2 (user@host) (gcc version 3.4.0) #1
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| 28 | Tue Apr 20 21:22:18 GMT 2004</computeroutput></screen>
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| 29 |
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| 30 | <para>If the results of the above command do not state that the host kernel is
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| 31 | either 2.6.2 (or later), or that it was not compiled using a GCC-3.0 (or later)
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| 32 | compiler, one will need to be installed. There are two methods you can take to
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| 33 | solve this. First, see if your Linux vendor provides a 2.6.2 (or later) kernel
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| 34 | package. If so, you may wish to install it. If your vendor doesn't offer a 2.6.2
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| 35 | (or later) kernel package, or you would prefer not to install it, then you can
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| 36 | compile a 2.6 kernel yourself. Instructions for compiling the kernel and
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| 37 | configuring the boot loader (assuming the host uses GRUB) are located in <xref
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| 38 | linkend="chapter-bootable"/>. This second option can also been seen as a gauge
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| 39 | of your current Linux skills. If this second requirement is too steep then the
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| 40 | LFS book will not likely be much use to you at this time.</para>
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| 41 |
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| 42 | </sect1>
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| 43 |
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