diff options
author | Manuel Canales Esparcia <manuel@linuxfromscratch.org> | 2004-12-20 16:38:42 +0000 |
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committer | Manuel Canales Esparcia <manuel@linuxfromscratch.org> | 2004-12-20 16:38:42 +0000 |
commit | 67906555169af493bc63114cfd1a38667dda09f5 (patch) | |
tree | af81b6abdaf8d7430d21ea6b94ed4ba13f1f1e02 /chapter05/adjusting.xml | |
parent | faf339809307b5793dbd1d5891e8270d26394037 (diff) |
Removed text in chapter 05 - first round.
git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@4431 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
Diffstat (limited to 'chapter05/adjusting.xml')
-rw-r--r-- | chapter05/adjusting.xml | 81 |
1 files changed, 4 insertions, 77 deletions
diff --git a/chapter05/adjusting.xml b/chapter05/adjusting.xml index f2a76ebe0..6d3aca31f 100644 --- a/chapter05/adjusting.xml +++ b/chapter05/adjusting.xml @@ -7,37 +7,12 @@ <title>Adjusting the toolchain</title> <?dbhtml filename="adjusting.html"?> -<para>Now that the temporary C libraries have been installed, all -the tools compiled in the rest of this chapter should be linked against these -libraries. In order to accomplish this, the linker and the compiler's -specs file, need to be adjsted.</para> - -<para> Some people would say that there is <emphasis><quote>black magic juju -below this line</quote></emphasis>, but it is really very simple.</para> - -<para>First, the linker, adjusted at the end of the first pass of Binutils, is -installed by running the following command from within +<para>Run the following command from within the <filename class="directory">binutils-build</filename> directory:</para> <screen><userinput>make -C ld install</userinput></screen> -<para>From this point onwards everything will link <emphasis>only</emphasis> -against the libraries in <filename class="directory">/tools/lib</filename>.</para> - -<note><para>If you missed the earlier warning to retain the Binutils -source and build directories from the first pass, dont worry - all is not lost. -Just ignore the above command. This results in a small chance of the subsequent -testing programs linking against libraries on the host. This is not ideal, but -it's not a major problem. The situation is corrected when the second pass of -Binutils is installed later on.</para></note> - -<para>Now that the adjusted linker is installed, the Binutils build and source -directories should be <emphasis>removed</emphasis>.</para> - -<para>The next task is to amend our GCC specs file so that it points -to the new dynamic linker. A simple sed script will accomplish this:</para> - -<!-- Ampersands are needed to allow cut and paste --> +<para>Amend the GCC specs file:</para> <screen><userinput>SPECFILE=`gcc --print-file specs` && sed 's@ /lib/ld-linux.so.2@ /tools/lib/ld-linux.so.2@g' \ @@ -45,65 +20,17 @@ sed 's@ /lib/ld-linux.so.2@ /tools/lib/ld-linux.so.2@g' \ mv -f tempspecfile $SPECFILE && unset SPECFILE</userinput></screen> -<para>It is recommended that the above command be cut-and-pasted in order to -ensure correctness - Alternatively, the specs file can be edited by hand. This -is done simply by replacing every occurrence of -<quote>/lib/ld-linux.so.2</quote> with <quote>/tools/lib/ld-linux.so.2</quote>. -</para> - -<para> Be sure to visually inspect the specs file in order to verify the intended changes have been made.</para> - -<important><para>If you are working on a platform where the name of the dynamic -linker is something other than <filename>ld-linux.so.2</filename>, you -<emphasis>must</emphasis> replace <filename>ld-linux.so.2</filename> with the -name of your platform's dynamic linker in the above commands. Refer back to -<xref linkend="ch-tools-toolchaintechnotes"/> if necessary.</para></important> - -<para>Lastly, there is a possibility that some include files from the host -system have found their way into GCC's private include dir. This can happen -as a result of of GCC's <quote>fixincludes</quote> process which runs as part -of the GCC build. We'll explain more about this further on in this chapter. -Run the following commands to eliminate this possibility:</para> - <screen><userinput>rm -f /tools/lib/gcc/*/*/include/{pthread.h,bits/sigthread.h}</userinput></screen> - -<caution><para>It is imperative at this point to stop and ensure that the basic -functions (compiling and linking) of the new toolchain are working as expected. -To perform a simple sanity check, run the following commands:</para> - <screen><userinput>echo 'main(){}' > dummy.c cc dummy.c readelf -l a.out | grep ': /tools'</userinput></screen> -<para>If everything is working correctly, there should be no errors, and the -output of the last command will be of the form:</para> - -<blockquote><screen><computeroutput>[Requesting program interpreter: /tools/lib/ld-linux.so.2]</computeroutput></screen></blockquote> - -<para>Note especially that <filename class="directory">/tools/lib</filename> -appears as the prefix of our dynamic linker.</para> - -<para>If the output is not -as shown above, or there was no output at all, then something is seriously -wrong. You will need to investigate and retrace your steps to find out where the -problem is and correct it. There is no point in continuing until this is done. -First, perform the sanity check again, using <command>gcc</command> instead of -<command>cc</command>. If this works, then the -<filename class="symlink">/tools/bin/cc</filename> symlink is missing. Revisit -<xref linkend="ch-tools-gcc-pass1"/> and install the symlink. Second, ensure your PATH -is correct. You can check this by running <userinput>echo $PATH</userinput> and -verifying that <filename class="directory">/tools/bin</filename> is at the head -of the list. If the PATH is wrong it could mean you're not logged in as user -<emphasis>lfs</emphasis> or something went wrong back in -<xref linkend="ch-tools-settingenviron"/>. Third, something may have gone wrong with -the specs file amendment above. In this case redo the specs file amendment -being careful to cut-and-paste the commands.</para> +<para>The output of the last command will be of the form:</para> -<para>Once you are satisfied that all is well, clean up the test files:</para> +<screen><computeroutput>[Requesting program interpreter: /tools/lib/ld-linux.so.2]</computeroutput></screen> <screen><userinput>rm dummy.c a.out</userinput></screen> -</caution> </sect1> |