1 | <sect2>
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2 | <title>Installation of Glibc</title>
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3 |
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4 | <para>At the beginning of this chapter you installed Glibc and applied a
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5 | patch to it. Part of this patch was undoing some changes to make static
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6 | binaries compiled against Glibc-2.2 work. However, this is not what the
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7 | Glibc developers intended and we don't need to keep this modified Glibc
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8 | around. So we reinstall Glibc here to remove this patch.</para>
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9 |
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10 | <para>A second reason to install Glibc again is because it's considered
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11 | cleaner. The first Glibc was installed using programs compiled on your host
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12 | distribution which sometimes has the effect of tainting Glibc. While this
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13 | isn't a problem with the other packages compiled early in this chapter, for
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14 | Glibc we want to be sure it's 100% OK (although feel free to reinstall
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15 | other packages at this point so you can say you compiled an LFS system with
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16 | LFS. Much like GCC's bootstrap installation method).</para>
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17 |
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18 | <para>We'll also install the linuxthreads man pages here. As you may
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19 | recall, during the first installation of Glibc this wasn't possible because
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20 | Perl wasn't installed yet. Everything we need to install the Glibc
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21 | linuxthread man pages is present now, so we'll take care of this too
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22 | now.</para>
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23 |
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24 | <para>Before starting to install glibc, you must cd into the
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25 | glibc-&glibc-version; directory and unpack glibc-linuxthreads inside
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26 | the glibc-&glibc-version; directory, not in /usr/src as you normally
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27 | would do.</para>
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28 |
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29 | <para>This package is known to behave badly when you have changed its
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30 | default optimization flags (including the -march and -mcpu options). Glibc
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31 | is best left alone. Therefore, if you have defined any environment variables
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32 | that override default optimizations, such as CFLAGS and CXXFLAGS, we
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33 | recommend unsetting or modifying them when building Glibc. You have
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34 | been warned.</para>
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35 |
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36 | <para>Basically, compiling Glibc in any other way than the book suggests
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37 | is putting your system at very high risk.</para>
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38 |
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39 | <para>Install Glibc by running the following commands:</para>
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40 |
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41 | <para><screen><userinput>mkdir ../glibc-build &&
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42 | cd ../glibc-build &&
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43 | ../glibc-&glibc-version;/configure --prefix=/usr --disable-profile \
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44 | --enable-add-ons --libexecdir=/usr/bin &&
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45 | make &&
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46 | make install &&
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47 | make -C linuxthreads/man &&
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48 | make -C linuxthread/man install &&
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49 | exec /static/bin/bash --login</userinput></screen></para>
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50 |
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51 | </sect2>
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52 |
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