mirror of https://github.com/tLDP/LDP
59 lines
2.8 KiB
XML
59 lines
2.8 KiB
XML
<sect1 id="ch05-introduction">
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<title>Introduction</title>
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<?dbhtml filename="introduction.html" dir="chapter05"?>
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<para>In this chapter we will compile and install a minimal
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Linux system. This system will contain just enough tools to be able
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to start constructing the final LFS system in the next chapter.</para>
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<para>The building of this minimal system is done in two steps: first we
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build a brand-new and host-independent toolchain (compiler, assembler,
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linker and libraries), and then use this to build all the other essential
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tools.</para>
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<para>The files compiled in this chapter will be installed under the
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<filename class="directory">$LFS/tools</filename> directory
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to keep them separate from the files installed in the next chapter.
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Since the packages compiled here are merely temporary, we don't want
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them to pollute the soon-to-be LFS system.</para>
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<para>The key to learning what makes a Linux system work is to know
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what each package is used for and why the user or the system needs it.
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For this purpose a short summary of the content of each package is given
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before the actual installation instructions. For a short description of
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each program in a package, please refer to the corresponding section in
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<xref linkend="appendixa"/>.</para>
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<para>The build instructions assume that you are using the bash shell. There
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is also a general expectation that you have already unpacked the sources for a
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package and have performed a <userinput>cd</userinput> into the unpacked source
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directory before issuing the build commands.</para>
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<para>Several of the packages are patched before compilation, but only when
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the patch is needed to circumvent a problem. Often the patch is needed in
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both this and the next chapter, but sometimes in only one of them. Therefore,
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don't worry when instructions for a downloaded patch seem to be missing.</para>
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<para>During the installation of most packages you will
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see all kinds of compiler warnings scroll by on your screen. These are
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normal and can be safely ignored. They are just what they say they are:
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warnings -- mostly about deprecated, but not invalid, use of the C or C++
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syntax. It's just that C standards have changed rather often and some
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packages still use the older standard, which is not really a problem.</para>
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<para><emphasis>Unless</emphasis> told not to, you should normally delete the
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source and build directories after installing each package -- for cleanness
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sake and to save space.</para>
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<para>Before continuing, make sure the LFS environment variable is set up
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properly by executing the following:</para>
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<screen><userinput>echo $LFS</userinput></screen>
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<para>Make sure the output shows the path to your LFS partition's mount
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point, which is <filename class="directory">/mnt/lfs</filename> if you
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followed our example.</para>
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</sect1>
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