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52 lines
2.4 KiB
XML
52 lines
2.4 KiB
XML
<sect1 id="ch06-adjustingtoolchain">
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<title>Re-adjusting the toolchain</title>
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<?dbhtml filename="adjustingtoolchain.html" dir="chapter06"?>
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<para>Now that the new C libraries have been installed, it's time to re-adjust
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our toolchain. We'll adjust it so that it will link any newly compiled program
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against the new C libraries. Basically, this is the reverse of what we did
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in the "Locking in" stage in the beginning of the previous chapter.</para>
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<para>The first thing to do is to adjust the linker scripts. For this we
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retained the source and build directories from the second pass over Binutils.
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Install the adjusted linker scripts by running the following from within the
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<filename class="directory">binutils-build</filename> directory:</para>
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<para><screen><userinput>make -C ld INSTALL=/stage1/bin/install install-data-local</userinput></screen></para>
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<para>The linker scripts now contain
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no mention of <filename class="directory">/stage1/lib</filename> anymore.
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From now on every compiled program will link <emphasis>only</emphasis>
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against the libraries in <filename>/usr/lib</filename> and
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<filename>/lib</filename>. The extra
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<userinput>INSTALL=/stage1/bin/install</userinput> is needed because the
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Makefile created during the second pass still contains the reference to
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<filename>/usr/bin/install</filename>, which we obviously haven't installed
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yet.</para>
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<para>You can now remove the Binutils source and build directories.</para>
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<para>The next thing to do is to amend our GCC specs file so that it points
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to the new dynamic linker. Just like earlier on, we use a sed to accomplish
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this:</para>
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<para><screen><userinput>SPECFILE=/stage1/lib/gcc-lib/*/*/specs
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sed -e 's@/stage1/lib/ld.so.1@/lib/ld.so.1@g' \
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-e 's@/stage1/lib/ld-linux.so.2@/lib/ld-linux.so.2@g' \
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$SPECFILE > newspecfile
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mv newspecfile $SPECFILE
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unset SPECFILE</userinput></screen></para>
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<para>Again, cutting and pasting the above is recommended. And just like
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before, it is a good idea to check the linker scripts and the specs file to
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ensure the intended changes were actually made.</para>
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<para>Note that the linker scripts will still contain a reference to
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<filename class="directory">/stage1/i686-pc-linux-gnu/lib</filename>. This
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is unavoidable, but luckily does not present a problem. There are no
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libraries in that location as all the temporary stage1 libraries are
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located in <filename class="directory">/stage1/lib</filename>.</para>
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</sect1>
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