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53 lines
2.4 KiB
XML
53 lines
2.4 KiB
XML
<sect2>
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<title>Installation of Glibc</title>
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<para>At the beginning of this chapter you installed Glibc and applied a
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patch to it. Part of this patch was undoing some changes to make static
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binaries compiled against Glibc-2.2 work. However, this is not what the
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Glibc developers intended and we don't need to keep this modified Glibc
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around. So we reinstall Glibc here to remove this patch.</para>
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<para>A second reason to install Glibc again is because it's considered
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cleaner. The first Glibc was installed using programs compiled on your host
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distribution which sometimes has the effect of tainting Glibc. While this
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isn't a problem with the other packages compiled early in this chapter, for
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Glibc we want to be sure it's 100% OK (although feel free to reinstall
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other packages at this point so you can say you compiled an LFS system with
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LFS. Much like GCC's bootstrap installation method).</para>
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<para>We'll also install the linuxthreads man pages here. As you may
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recall, during the first installation of Glibc this wasn't possible because
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Perl wasn't installed yet. Everything we need to install the Glibc
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linuxthread man pages is present now, so we'll take care of this too
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now.</para>
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<para>Before starting to install glibc, you must cd into the
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glibc-&glibc-version; directory and unpack glibc-linuxthreads inside
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the glibc-&glibc-version; directory, not in /usr/src as you normally
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would do.</para>
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<para>This package is known to behave badly when you have changed its
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default optimization flags (including the -march and -mcpu options). Glibc
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is best left alone. Therefore, if you have defined any environment variables
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that override default optimizations, such as CFLAGS and CXXFLAGS, we
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recommend unsetting or modifying them when building Glibc. You have
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been warned.</para>
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<para>Basically, compiling Glibc in any other way than the book suggests
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is putting your system at very high risk.</para>
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<para>Install Glibc by running the following commands:</para>
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<para><screen><userinput>mkdir ../glibc-build &&
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cd ../glibc-build &&
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../glibc-&glibc-version;/configure --prefix=/usr --disable-profile \
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--enable-add-ons --libexecdir=/usr/bin &&
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make &&
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make install &&
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make -C ../glibc-&glibc-version;/linuxthreads/man &&
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make -C ../glibc-&glibc-version;/linuxthreads/man install &&
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exec /bin/bash --login</userinput></screen></para>
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</sect2>
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