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57 lines
2.0 KiB
XML
57 lines
2.0 KiB
XML
<sect2><title> </title><para> </para></sect2>
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<sect2>
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<title>Installation of Zlib</title>
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<para>Zlib has a potential buffer overflow in its gzprintf() function,
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that, though difficult to take advantage of, should be taken care of. Do
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so by applying this patch:</para>
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<para><screen><userinput>patch -Np1 -i ../zlib-&zlib-patch-version;.patch</userinput></screen></para>
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<para>Now prepare Zlib for compilation:</para>
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<para><screen><userinput>./configure --prefix=/usr --shared</userinput></screen></para>
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<para>Note: Zlib is known to build it's shared library incorrectly
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if a CFLAGS is specified in the enviornment. If you are using your
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own CFLAGS variables, ensure you add the <emphasis role="strong">-fPIC</emphasis>
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directive during this stage, and remove it after.</para>
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<para>Compile the package:</para>
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<para><screen><userinput>make</userinput></screen></para>
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<para>Install the shared libraries:</para>
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<para><screen><userinput>make install</userinput></screen></para>
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<para>Now also build and install the non-shared libraries:</para>
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<para><screen><userinput>make clean
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./configure --prefix=/usr
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make
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make test
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make install</userinput></screen></para>
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<para>The shared Zlib library should be installed in the
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<filename>/lib</filename> directory. That way, in the event
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that you must boot without the <filename>/usr</filename>
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directory, vital system programs will still have access to
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the library:</para>
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<para><screen><userinput>mv /usr/lib/libz.so.* /lib</userinput></screen></para>
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<para>The <filename>/usr/lib/libz.so</filename> symlink is
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linked to a file which no longer exists, because we moved
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it. Create a symbolic link to the new location of the
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library:</para>
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<para><screen><userinput>ln -sf ../../lib/libz.so.1 /usr/lib/libz.so</userinput></screen></para>
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<para>Zlib does not install its manual page. Issue the
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following command to install this documentation:</para>
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<para><screen><userinput>cp zlib.3 /usr/share/man/man3</userinput></screen></para>
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</sect2>
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