Ignore:
Timestamp:
12/20/2004 04:38:42 PM (19 years ago)
Author:
Manuel Canales Esparcia <manuel@…>
Branches:
10.0, 10.0-rc1, 10.1, 10.1-rc1, 11.0, 11.0-rc1, 11.0-rc2, 11.0-rc3, 11.1, 11.1-rc1, 11.2, 11.2-rc1, 11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, 6.1, 6.1.1, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.5-systemd, 7.6, 7.6-systemd, 7.7, 7.7-systemd, 7.8, 7.8-systemd, 7.9, 7.9-systemd, 8.0, 8.1, 8.2, 8.3, 8.4, 9.0, 9.1, arm, bdubbs/gcc13, ml-11.0, multilib, renodr/libudev-from-systemd, s6-init, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/lfs-next, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc
Children:
fba1478
Parents:
faf3398
Message:

Removed text in chapter 05 - first round.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@4431 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

File:
1 edited

Legend:

Unmodified
Added
Removed
  • chapter05/adjusting.xml

    rfaf3398 r6790655  
    88<?dbhtml filename="adjusting.html"?>
    99
    10 <para>Now that the temporary C libraries have been installed, all
    11 the tools compiled in the rest of this chapter should be linked against these
    12 libraries. In order to accomplish this, the linker and the compiler's
    13 specs file, need to be adjsted.</para>
    14 
    15 <para> Some people would say that there is <emphasis><quote>black magic juju
    16 below this line</quote></emphasis>, but it is really very simple.</para>
    17 
    18 <para>First, the linker, adjusted at the end of the first pass of Binutils, is
    19 installed by running the following command from within
     10<para>Run the following command from within
    2011the <filename class="directory">binutils-build</filename> directory:</para>
    2112
    2213<screen><userinput>make -C ld install</userinput></screen>
    2314
    24 <para>From this point onwards everything will link <emphasis>only</emphasis>
    25 against the libraries in <filename class="directory">/tools/lib</filename>.</para>
    26 
    27 <note><para>If you missed the earlier warning to retain the Binutils
    28 source and build directories from the first pass, dont worry - all is not lost.
    29 Just ignore the above command. This results in a small chance of the subsequent
    30 testing programs linking against libraries on the host. This is not ideal, but
    31 it's not a major problem. The situation is corrected when the second pass of
    32 Binutils is installed later on.</para></note>
    33 
    34 <para>Now that the adjusted linker is installed, the Binutils build and source
    35 directories should be <emphasis>removed</emphasis>.</para>
    36 
    37 <para>The next task is to amend our GCC specs file so that it points
    38 to the new dynamic linker. A simple sed script will accomplish this:</para>
    39 
    40 <!-- Ampersands are needed to allow cut and paste -->
     15<para>Amend the GCC specs file:</para>
    4116
    4217<screen><userinput>SPECFILE=`gcc --print-file specs` &amp;&amp;
     
    4621unset SPECFILE</userinput></screen>
    4722
    48 <para>It is recommended that the above command be cut-and-pasted in order to
    49 ensure correctness - Alternatively, the specs file can be edited by hand. This
    50 is done simply by replacing every occurrence of
    51 <quote>/lib/ld-linux.so.2</quote> with <quote>/tools/lib/ld-linux.so.2</quote>.
    52 </para>
    53 
    54 <para> Be sure to visually inspect the specs file in order to verify the intended changes have been made.</para>
    55 
    56 <important><para>If you are working on a platform where the name of the dynamic
    57 linker is something other than <filename>ld-linux.so.2</filename>, you
    58 <emphasis>must</emphasis> replace <filename>ld-linux.so.2</filename> with the
    59 name of your platform's dynamic linker in the above commands. Refer back to
    60 <xref linkend="ch-tools-toolchaintechnotes"/> if necessary.</para></important>
    61 
    62 <para>Lastly, there is a possibility that some include files from the host
    63 system have found their way into GCC's private include dir. This can happen
    64 as a result of of GCC's <quote>fixincludes</quote> process which runs as part
    65 of the GCC build.  We'll explain more about this further on in this chapter.
    66 Run the following commands to eliminate this possibility:</para>
    67 
    6823<screen><userinput>rm -f /tools/lib/gcc/*/*/include/{pthread.h,bits/sigthread.h}</userinput></screen>
    69 
    70 
    71 <caution><para>It is imperative at this point to stop and ensure that the basic
    72 functions (compiling and linking) of the new toolchain are working as expected.
    73 To perform a simple sanity check, run the following commands:</para>
    7424
    7525<screen><userinput>echo 'main(){}' &gt; dummy.c
     
    7727readelf -l a.out | grep ': /tools'</userinput></screen>
    7828
    79 <para>If everything is working correctly, there should be no errors, and the
    80 output of the last command will be of the form:</para>
     29<para>The output of the last command will be of the form:</para>
    8130
    82 <blockquote><screen><computeroutput>[Requesting program interpreter: /tools/lib/ld-linux.so.2]</computeroutput></screen></blockquote>
    83 
    84 <para>Note especially that <filename class="directory">/tools/lib</filename>
    85 appears as the prefix of our dynamic linker.</para>
    86 
    87 <para>If the output is not
    88 as shown above, or there was no output at all, then something is seriously
    89 wrong. You will need to investigate and retrace your steps to find out where the
    90 problem is and correct it. There is no point in continuing until this is done.
    91 First, perform the sanity check again, using <command>gcc</command> instead of
    92 <command>cc</command>. If this works, then the
    93 <filename class="symlink">/tools/bin/cc</filename> symlink is missing. Revisit
    94 <xref linkend="ch-tools-gcc-pass1"/> and install the symlink. Second, ensure your PATH
    95 is correct. You can check this by running <userinput>echo $PATH</userinput> and
    96 verifying that <filename class="directory">/tools/bin</filename> is at the head
    97 of the list. If the PATH is wrong it could mean you're not logged in as user
    98 <emphasis>lfs</emphasis> or something went wrong back in
    99 <xref linkend="ch-tools-settingenviron"/>. Third, something may have gone wrong with
    100 the specs file amendment above. In this case redo the specs file amendment
    101 being careful to cut-and-paste the commands.</para>
    102 
    103 <para>Once you are satisfied that all is well, clean up the test files:</para>
     31<screen><computeroutput>[Requesting program interpreter: /tools/lib/ld-linux.so.2]</computeroutput></screen>
    10432
    10533<screen><userinput>rm dummy.c a.out</userinput></screen>
    106 </caution>
    10734
    10835
Note: See TracChangeset for help on using the changeset viewer.