| 1 | <sect1 id="ch06-adjustingtoolchain">
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| 2 | <title>Adjusting toolchain</title>
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| 3 | <?dbhtml filename="adjustingtoolchain.html" dir="chapter06"?>
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| 4 |
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| 5 | <para>Now that we have compiled all the necessary tools, it is time to
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| 6 | re-adjust our toolchain. We will set it up so that it will link any newly
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| 7 | compiled program against the new Glibc. Basically, this is the reverse of
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| 8 | what we did in the "Locking in" stage in the beginning of chapter 5.</para>
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| 9 |
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| 10 | <para>The first thing to do is to adjust the linker scripts. For this we
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| 11 | retained the <filename class="directory">binutils-build</filename>
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| 12 | directory from the second pass over Binutils. Run the following:</para>
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| 13 |
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| 14 | <para><screen><userinput>cd binutils-build
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| 15 | make -C ld INSTALL=/stage1/bin/install install-data-local</userinput></screen></para>
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| 16 |
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| 17 | <para>This installs the adjusted linker scripts. The linker scripts contain
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| 18 | no mention of <filename class="directory">/stage1/lib</filename> anymore.
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| 19 | From now on every compiled program will link <emphasis>only</emphasis>
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| 20 | against the libraries in <filename>/usr/lib</filename> and
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| 21 | <filename>/lib</filename>. The extra
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| 22 | <userinput>INSTALL=/stage1/bin/install</userinput> is needed because the
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| 23 | Makefile created during the second pass still contains the reference to
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| 24 | <filename>/usr/bin/install</filename>, which we obviously haven't installed
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| 25 | yet.</para>
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| 26 |
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| 27 | <para>You can now remove the Binutils source and build directories.</para>
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| 28 |
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| 29 | <para>The next thing to do is to amend our GCC specs file so that it points
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| 30 | to the new dynamic linker. Just like earlier on, we use a sed to accomplish
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| 31 | this:</para>
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| 32 |
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| 33 | <para><screen><userinput>SPECFILE=/stage1/lib/gcc-lib/*/*/specs
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| 34 | sed -e 's@/stage1/lib/ld.so.1@/lib/ld.so.1@g' \
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| 35 | -e 's@/stage1/lib/ld-linux.so.2@/lib/ld-linux.so.2@g' $SPECFILE > XX
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| 36 | mv XX $SPECFILE
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| 37 | unset SPECFILE</userinput></screen></para>
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| 38 |
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| 39 | <para>Again, cutting and pasting the above is recommended. And just like
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| 40 | before, it is a good idea to check the linker scripts and the specs file o
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| 41 | ensure the intended changes were actually made.</para>
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| 42 |
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| 43 | <para>Note that the linker scripts will still contain a reference to
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| 44 | <filename class="directory">/stage1/i686-pc-linux-gnu/lib</filename>. This
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| 45 | is unavoidable, but luckily does not present a problem. There are no
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| 46 | libraries in that location as all the temporary stage1 libraries are
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| 47 | located in <filename class="directory">/stage1/lib</filename>.</para>
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| 48 |
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| 49 | </sect1>
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| 50 |
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