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5 | %general-entities; |
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6 | ]> |
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7 | |
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8 | <sect1 id="ch-intro-how"> |
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9 | <?dbhtml filename="how.html"?> |
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10 | |
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11 | <title>How to Build a CLFS System</title> |
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12 | |
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13 | <para>The CLFS system will be built by using a previously installed |
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14 | Linux distribution (such as Debian, Fedora, Mandriva, SUSE, or Ubuntu). |
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15 | This existing Linux system (the host) will be used as a starting point to |
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16 | provide necessary programs, including a compiler, linker, and shell, |
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17 | to build the new system. Select the <quote>development</quote> option |
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18 | during the distribution installation to be able to access these |
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19 | tools.</para> |
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20 | |
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21 | <para>As an alternative to installing an entire separate distribution |
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22 | onto your machine, you may wish to use the Linux From Scratch LiveCD. |
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23 | This CD works well as a host system, providing all the tools you need to |
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24 | successfully follow the instructions in this book. It does also |
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25 | contain source packages and patches for the LFS book, and a copy of the LFS |
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26 | book, but not the needed packages or book for CLFS. You can still use the |
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27 | CD for building CLFS, but you will need to download the packages, patches |
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28 | and book separately. You can also look at |
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29 | <ulink url="&hints-root;Remastering_the_LFS_LiveCD"/> |
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30 | for infomation on building your own CD, replacing the LFS packages and book |
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31 | with those for CLFS. Once you have the CD, no network connection or |
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32 | additional downloads are necessary. For more information about the LFS |
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33 | LiveCD or to download a copy, visit <ulink url="&livecd-root;"/>.</para> |
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34 | |
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35 | <para><xref linkend="chapter-partitioning"/> of this book describes how |
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36 | to create a new Linux native partition and file system, the place |
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37 | where the new CLFS system will be compiled and installed. <xref |
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38 | linkend="chapter-getting-materials"/> explains which packages and |
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39 | patches need to be downloaded to build a CLFS system and how to store |
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40 | them on the new file system. <xref linkend="chapter-final-preps"/> |
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41 | discusses the setup for an appropriate working environment. Please read |
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42 | <xref linkend="chapter-final-preps"/> carefully as it explains several |
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43 | important issues the developer should be aware of before beginning to |
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44 | work through <xref linkend="chapter-cross-tools"/> and beyond.</para> |
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45 | |
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46 | <para><xref linkend="chapter-cross-tools"/> explains the installation of |
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47 | cross-compile tools which will be built on the host but be able to compile |
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48 | programs that run on the target machine. These cross-compile tools will |
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49 | be used to create the final-system.</para> |
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50 | |
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51 | <para>The process of building cross-compile tools first involves installing |
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52 | binutils into ${CLFS}/cross-tools, so that we have an asembler and a linker |
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53 | for our target architecture. GCC is then compiled statically and installed |
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54 | into ${CLFS}/cross-tools, this cross-compiler is used to build glibc for the |
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55 | final-system. The GCC cross-compiler is then rebuilt dynamically - this final |
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56 | cross-compiler is what will be used to build the final-system.</para> |
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57 | |
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58 | <para>In <xref linkend="chapter-building-system"/>, the full CLFS system is |
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59 | cross-compiled. The system is built using a sysroot compiler. Sysroot is a |
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60 | parameter passed to binutils and gcc that modifies its default search paths. |
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61 | </para> |
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62 | |
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63 | <para>To finish the installation, the CLFS-Bootscripts are set up in <xref |
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64 | linkend="chapter-bootscripts"/>, and the kernel and boot loader are set |
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65 | up in <xref linkend="chapter-bootable"/>. <xref linkend="chapter-finalizing"/> |
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66 | contains information on furthering the CLFS experience beyond this book. |
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67 | After the steps in this book have been implemented, the computer will be |
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68 | ready to reboot into the new CLFS system.</para> |
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69 | |
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70 | <para>This is the process in a nutshell. Detailed information on each |
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71 | step is discussed in the following chapters and package descriptions. |
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72 | Items that may seem complicated will be clarified, and everything will |
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73 | fall into place as the reader embarks on the CLFS adventure.</para> |
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74 | |
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75 | </sect1> |
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