| 1 | <sect2>
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| 2 | <title>Installation of Glibc</title>
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| 3 |
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| 4 | <para>Before starting to install glibc, you must cd into the
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| 5 | glibc-&glibc-version; directory and unpack glibc-linuxthreads inside
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| 6 | the glibc-&glibc-version; directory, not in /usr/src as you normally
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| 7 | would do.</para>
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| 8 |
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| 9 | <para>This package is known to behave badly when you have changed its default
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| 10 | optimization flags (including the -march and -mcpu options). Glibc is
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| 11 | best left alone, so we recommend you unsetting CFLAGS, CXXFLAGS and other
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| 12 | such variables/settings that would change the default optimization that
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| 13 | it comes with. Also, don't pass the --enable-kernel option to the configure
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| 14 | script. It's known to cause segmentation fauls when other packages like
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| 15 | fileutils, make and tar are linked against it.</para>
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| 16 |
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| 17 | <para>Basically, compiling Glibc in any way than this book suggests it, is
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| 18 | putting your system at very high risk.</para>
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| 19 |
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| 20 | <para>Install Glibc by running the following commands:</para>
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| 21 |
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| 22 | <para><screen><userinput>mknod -m 0666 /dev/null c 1 3 &&
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| 23 | touch /etc/ld.so.conf &&
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| 24 | cp malloc/Makefile malloc/Makefile.backup &&
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| 25 | sed 's%\$(PERL)%/usr/bin/perl%' malloc/Makefile.backup > malloc/Makefile &&
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| 26 | cp login/Makefile login/Makefile.backup &&
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| 27 | sed 's/root/0/' login/Makefile.backup > login/Makefile &&
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| 28 | mkdir ../glibc-build &&
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| 29 | cd ../glibc-build &&
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| 30 | ../glibc-&glibc-version;/configure --prefix=/usr \
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| 31 | --enable-add-ons --libexecdir=/usr/bin &&
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| 32 | cp config.make config.make.backup &&
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| 33 | sed 's/cross-compiling = yes/cross-compiling = no/' \
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| 34 | config.make.backup > config.make &&
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| 35 | make &&
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| 36 | make install &&
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| 37 | make localedata/install-locales &&
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| 38 | exec /bin/bash --login</userinput></screen></para>
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| 39 |
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| 40 | <para>An alternative to running <userinput>make
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| 41 | localedata/install-locales</userinput> is to only install those locales
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| 42 | which you need or want. This can be achieved using the localedef
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| 43 | command. Information on this can be found in the INSTALL
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| 44 | file in the glibc-&glibc-version; tree.</para>
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| 45 |
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| 46 | <para>During the configure stage you will see the following warning:</para>
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| 47 |
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| 48 | <blockquote><screen>configure: warning:
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| 49 | *** These auxiliary programs are missing or too old: msgfmt
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| 50 | *** some features will be disabled.
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| 51 | *** Check the INSTALL file for required versions.</screen></blockquote>
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| 52 |
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| 53 | <para>The missing msgfmt (from the gettext package which we will install
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| 54 | later in this chapter) is not fatal. The files msgfmt would create are
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| 55 | already pre-built, so you won't be missing out on anything. You would
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| 56 | only need it if you make changes to the Glibc manual files. Since we
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| 57 | don't do this by default, we can safely ignore it.</para>
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| 58 |
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| 59 | </sect2>
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| 60 |
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