source: BOOK/final-system/common/introduction.xml @ 2b9d835

clfs-3.0.0-systemdclfs-3.0.0-sysvinitsystemdsysvinit
Last change on this file since 2b9d835 was 2627330, checked in by Jim Gifford <clfs@…>, 15 years ago

Updated Hints Link

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4  <!ENTITY % general-entities SYSTEM "../../general.ent">
5  %general-entities;
6]>
7
8<sect1 id="ch-system-introduction">
9  <?dbhtml filename="introduction.html"?>
10
11  <title>Introduction</title>
12
13  <para os="a">In this chapter, we enter the building site and start
14  constructing the CLFS system in earnest. The installation of this
15  software is straightforward. Although in many cases the installation
16  instructions could be made shorter and more generic, we have opted
17  to provide the full instructions for every package to minimize the
18  possibilities for mistakes.  The key to learning what makes a Linux
19  system work is to know what each package is used for and why the user
20  (or the system) needs it.  For every installed package, a summary of
21  its contents is given, followed by concise descriptions of each
22  program and library the package installed.</para>
23
24  <para os="b">If using compiler optimizations, please review the
25  optimization hint at <ulink url="&hints-root;Optimization"/>.
26  Compiler optimizations can make a program run slightly faster, but
27  they may also cause compilation difficulties and problems when
28  running the program. If a package refuses to compile when using
29  optimization, try to compile it without optimization and see if
30  that fixes the problem. Even if the package
31  does compile when using optimization, there is the risk it may have
32  been compiled incorrectly because of the complex interactions between
33  the code and build tools.  Also note that the <option>-march</option>
34  and <option>-mtune</option> options may cause problems with the toolchain
35  packages (Binutils, GCC and Glibc). The small potential gains achieved in
36  using compiler optimizations are often outweighed by the risks. First-time
37  builders of CLFS are encouraged to build without custom optimizations.
38  The subsequent system will still run very fast and be stable at the
39  same time.</para>
40
41  <para os="c">The order that packages are installed in this chapter needs to
42  be strictly followed to ensure that no program accidentally acquires a
43  path referring to <filename class="directory">/tools</filename>
44  hard-wired into it. For the same reason, do not compile packages in
45  parallel. Compiling in parallel may save time (especially on dual-CPU
46  machines), but it could result in a program containing a hard-wired
47  path to <filename class="directory">/tools</filename>, which will
48  cause the program to stop working when that directory is
49  removed.</para>
50
51  <para os="d">To keep track of which package installs particular files, a
52  package manager can be used. For a general overview of different styles of
53  package managers, please take a look at the next page.</para>
54
55</sect1>
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