| 1 | <sect1 id="ch05-introduction">
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| 2 | <title>Introduction</title>
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| 3 | <?dbhtml filename="introduction.html" dir="chapter05"?>
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| 4 |
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| 5 | <para>In this chapter we will compile and install a minimal
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| 6 | Linux system. This system will contain just enough tools to be able
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| 7 | to start constructing the final LFS system in the next chapter.</para>
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| 8 |
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| 9 | <para>The software in this chapter will be linked statically, because
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| 10 | there is a possibility that your host Linux system uses a different
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| 11 | version of the C library than the version you downloaded for
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| 12 | use in your LFS system. If we were to link the programs in this
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| 13 | chapter against that older C library, these programs might work
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| 14 | incorrectly, or not at all, when we change to the LFS system.</para>
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| 15 |
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| 16 | <para>The files compiled in this chapter will be installed under the
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| 17 | <filename class="directory">$LFS/static</filename> directory,
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| 18 | to keep them separate from the files installed in the next chapter.
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| 19 | As everything done here is only temporarily, we don't want
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| 20 | these files to pollute the to-be LFS system.</para>
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| 21 |
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| 22 | <para>The key to learning what makes a Linux system work is to know
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| 23 | exactly what each package is used for, and why the user or the system
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| 24 | needs it. For this purpose a short description of the content of each
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| 25 | package is given right after the installation instructions.</para>
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| 26 |
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| 27 | <para>During the installation of several packages you will probably
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| 28 | see all kinds of compiler warnings scroll by on your screen. These are
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| 29 | normal and can be safely ignored. They are just what they say they are:
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| 30 | warnings -- mostly about improper, but not illegal, use of the C or C++
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| 31 | syntax. It's just that C standards have changed rather often and some
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| 32 | packages still use the older standard, which is not really a problem.</para>
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| 33 |
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| 34 | <para>Before you start, make sure the LFS environment variable is set up
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| 35 | properly if you decided to make use of it. Run the following:</para>
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| 36 |
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| 37 | <para><screen><userinput>echo $LFS</userinput></screen></para>
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| 38 |
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| 39 | <para>Check to make sure the output contains the correct directory to the LFS
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| 40 | partition's mount point (/mnt/lfs for example).</para>
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| 41 |
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| 42 | </sect1>
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| 43 |
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