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 building of this minimal system is done in two steps: first we
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10 | build a brand-new and host-independent toolchain (compiler, assembler,
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11 | linker and libraries), and then use this to build all the other essential
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12 | tools.</para>
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13 |
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14 | <para>The files compiled in this chapter will be installed under the
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15 | <filename class="directory">$LFS/stage1</filename> directory,
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16 | to keep them separate from the files installed in the next chapter.
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17 | Since the packages compiled here are merely temporary, we don't want
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18 | them to pollute the soon-to-be LFS system.</para>
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19 |
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20 | <para>The key to learning what makes a Linux system work is to know
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21 | what each package is used for, why the user or the system needs it.
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22 | For this purpose a short summary of the content of each package is given
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23 | before the actual installation instructions. For a short description of
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24 | each program in a package, please refer to the corresponding section in
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25 | <xref linkend="appendixa"/>.</para>
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26 |
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27 | <para>Several of the packages are patched before compilation, but only when
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28 | the patch is needed to circumvent a problem. Often the patch is needed in
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29 | both this and the next chapter, but sometimes in only one of them. So, don't
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30 | worry when instructions for a downloaded patch seem to be missing.</para>
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31 |
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32 | <para>During the installation of most packages you will
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33 | see all kinds of compiler warnings scroll by on your screen. These are
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34 | normal and can be safely ignored. They are just what they say they are:
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35 | warnings -- mostly about improper, but not illegal, use of the C or C++
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36 | syntax. It's just that C standards have changed rather often and some
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37 | packages still use the older standard, which is not really a problem.</para>
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38 |
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39 | <para>Before continuing, make sure the LFS environment variable is set up
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40 | properly (if you decided to make use of it) by executing the following:</para>
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41 |
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42 | <para><screen><userinput>echo $LFS</userinput></screen></para>
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43 |
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44 | <para>Make sure the output shows the path to your LFS partition's mount
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45 | point, which is <filename class="directory">/mnt/lfs</filename> if you
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46 | followed our example.</para>
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47 |
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48 | </sect1>
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49 |
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