Changeset 3a56c9a


Ignore:
Timestamp:
06/01/2020 02:35:49 PM (18 months ago)
Author:
Pierre Labastie <pieere@…>
Branches:
10.0, 10.0-rc1, 10.1, 10.1-rc1, 11.0, 11.0-rc1, 11.0-rc2, 11.0-rc3, cross-chap5, ml-11.0, multilib, trunk, xry111/git-transition, xry111/glibc-2.34, xry111/tester-nohack, xry111/usr-move
Children:
aa990c9
Parents:
4f3e4e3
Message:

Rewrite "How to Build an LFS System" for cross chapter 5

git-svn-id: http://svn.linuxfromscratch.org/LFS/branches/cross-chap5@11888 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

File:
1 edited

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  • chapter01/how.xml

    r4f3e4e3 r3a56c9a  
    5353
    5454  <para><xref linkend="chapter-temporary-tools"/> also shows you how to
    55   build a first pass of the toolchain, including Binutils and GCC (first pass
    56   basically means these two core packages will be reinstalled).
     55  build a C cross-compiling toolchain as a first step, including binutils
     56  and GCC. Cross-compiling is not absolutely needed since the machine we'll
     57  run LFS on is the same as the one we build on, but it has the advantage
     58  of clearly separating the already installed system and the future LFS one.
    5759  The next step is to build Glibc, the C library. Glibc will be compiled by
    58   the toolchain programs built in the first pass. Then, a second pass of the
    59   toolchain will be built. This time, the toolchain will be dynamically linked
    60   against the newly built Glibc. The remaining <xref
    61   linkend="chapter-temporary-tools"/> packages are built using this second
    62   pass toolchain. When this is done, the LFS installation process will no
    63   longer depend on the host distribution, with the exception of the running
    64   kernel. </para>
     60  the toolchain programs built previously. Then, the missing bits for a
     61  C++ cross-compiling toolchain will be built. It is then possible to build
     62  packages that are needed to resolve circular dependencies in such a way
     63  that the produced executables and libraries are completely independent
     64  from the installed distribution.</para>
     65
     66  <para>The remainder of <xref linkend="chapter-temporary-tools"/> adds
     67  the packages necessary to get a complete build environment. This is done
     68  after running the <command>chroot</command> (change root) program to enter
     69  a virtual environment and start a new shell whose root directory will be
     70  set to the LFS partition. This is very similar to rebooting and instructing
     71  the kernel to mount the LFS partition as the root partition. The system
     72  does not actually reboot, but instead uses <command>chroot</command>
     73  because creating a bootable system requires additional work which is not
     74  ecessary just yet. The major advantage is that <quote>chrooting</quote>
     75  allows to isolate the build process from the installed distribution, while
     76  using the installed kernel.</para>
    6577
    6678  <para>This effort to isolate the new system from the host distribution may
     
    6880  provided in <xref linkend="ch-tools-toolchaintechnotes"/>.</para>
    6981
    70   <para><xref linkend="chapter-building-system"/> begins with installing the
    71   remaining packages needed to build and test the final toolchain. Then, the
    72   full LFS system is built. But first, the <command>chroot</command> (change
    73   root) program is used to enter a virtual environment and start a new shell
    74   whose root directory will be set to the LFS partition. This is very similar
    75   to rebooting and instructing the kernel to mount the LFS partition as the
    76   root partition. The system does not actually reboot, but instead uses
    77   <command>chroot</command> because creating a bootable system requires
    78   additional work which is not necessary just yet. The major advantage is
    79   that <quote>chrooting</quote> allows you to continue using the host system
     82  <para>In <xref linkend="chapter-building-system"/>, The
     83  full LFS system is built. Another advantage provided by the chroot
     84  environment is that it allows you to continue using the host system
    8085  while LFS is being built. While waiting for package compilations to
    8186  complete, you can continue using your computer as normal.</para>
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