| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| 8 | <sect1 id="pre-hostreqs">
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| 9 | <?dbhtml filename="hostreqs.html"?>
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| 10 |
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| 11 | <title>Host System Requirements</title>
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| 12 |
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| 13 | <para>The host must be running at least a 2.6.2 kernel compiled with GCC-3.0
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| 14 | or higher. There are two main reasons for this requirement. First, the Native
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| 15 | POSIX Threading Library (NPTL) test suite will segfault if the host's kernel
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| 16 | has not been compiled with GCC-3.0 or a later version. Second, the 2.6.2 or
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| 17 | later version of the kernel is required for the use of Udev. Udev creates
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| 18 | devices dynamically by reading from the <systemitem
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| 19 | class="filesystem">sysfs</systemitem> file system. However, support for this
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| 20 | filesystem has only recently been implemented in most of the kernel drivers.
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| 21 | We must be sure that all critical system devices get created properly.</para>
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| 22 |
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| 23 | <para>In order to determine whether the host kernel meets the requirements
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| 24 | outlined above, run the following command:</para>
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| 25 |
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| 26 | <screen role="nodump"><userinput>cat /proc/version</userinput></screen>
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| 27 |
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| 28 | <para>This will produce output similar to:</para>
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| 29 |
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| 30 | <screen><computeroutput>Linux version 2.6.2 (user@host) (gcc version 3.4.0) #1
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| 31 | Tue Apr 20 21:22:18 GMT 2004</computeroutput></screen>
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| 32 |
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| 33 | <para>If the results of the above command do not state that the host kernel
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| 34 | is either 2.6.2 (or later), or that it was not compiled using a GCC-3.0 (or
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| 35 | later) compiler, one will need to be installed. There are two methods you
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| 36 | can take to solve this. First, see if your Linux vendor provides a 2.6.2 (or
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| 37 | later) kernel package. If so, you may wish to install it. If your vendor
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| 38 | doesn't offer a 2.6.2 (or later) kernel package, or you would prefer not to
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| 39 | install it, then you can compile a 2.6 kernel yourself. Instructions for
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| 40 | compiling the kernel and configuring the boot loader (assuming the host
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| 41 | uses GRUB) are located in <xref linkend="chapter-bootable"/>. This second
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| 42 | option can also be seen as a gauge of your current Linux skills. If this
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| 43 | second requirement is too steep, then the LFS book will not likely be much
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| 44 | use to you at this time.</para>
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| 45 |
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| 46 | </sect1>
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