1 | <sect2><title> </title><para> </para></sect2>
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2 |
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3 | <sect2>
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4 | <title>Glibc installation</title>
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5 |
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6 | <para>Before starting to install Glibc, you must <userinput>cd</userinput>
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7 | into the <filename>glibc-&glibc-version;</filename> directory and unpack
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8 | Glibc-linuxthreads in that directory, not in <filename>/usr/src</filename> as
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9 | you would normally do.</para>
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10 |
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11 | <note><para>We are going to run the test suite for Glibc in this chapter.
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12 | However, it's worth noting that the Glibc test suite we run in this chapter is
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13 | considered not as critical as the one we run in Chapter 6.</para></note>
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14 |
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15 | <para>This package is known to behave badly when you have changed its
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16 | default optimization flags (including the -march and -mcpu options).
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17 | Therefore, if you have defined any environment variables that override
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18 | default optimizations, such as CFLAGS and CXXFLAGS, we recommend unsetting
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19 | them when building Glibc.</para>
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20 |
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21 | <para>Basically, compiling Glibc in any other way than the book suggests
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22 | is putting the stability of your system at risk.</para>
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23 |
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24 | <para>Though it is a harmless message, the install stage of Glibc will
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25 | complain about the absence of <filename>/tools/etc/ld.so.conf</filename>.
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26 | Fix this annoying little error with:</para>
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27 |
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28 | <para><screen><userinput>mkdir /tools/etc
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29 | touch /tools/etc/ld.so.conf</userinput></screen></para>
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30 |
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31 | <para>Also, Glibc has a subtle problem when compiled with GCC 3.3.1.
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32 | Apply the following patch to fix this:</para>
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33 |
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34 | <para><screen><userinput>patch -Np1 -i ../glibc-2.3.2-sscanf-1.patch
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35 | </userinput></screen></para>
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36 |
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37 | <para>The Glibc documentation recommends building Glibc outside of the source
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38 | directory in a dedicated build directory:</para>
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39 |
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40 | <para><screen><userinput>mkdir ../glibc-build
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41 | cd ../glibc-build</userinput></screen></para>
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42 |
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43 | <para>Next, prepare Glibc to be compiled:</para>
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44 |
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45 | <para><screen><userinput>../glibc-&glibc-version;/configure --prefix=/tools \
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46 | --disable-profile --enable-add-ons \
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47 | --with-headers=/tools/include \
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48 | --with-binutils=/tools/bin \
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49 | --without-gd</userinput></screen></para>
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50 |
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51 | <para>The meaning of the new configure options:</para>
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52 |
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53 | <itemizedlist>
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54 | <listitem><para><userinput>--disable-profile</userinput>: This disables the
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55 | building of the libraries with profiling information. Omit this option if you
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56 | plan to do profiling.</para></listitem>
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57 |
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58 | <listitem><para><userinput>--enable-add-ons</userinput>: This enables any
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59 | add-ons that were installed with Glibc, in our case Linuxthreads.</para></listitem>
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60 |
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61 | <listitem><para><userinput>--with-binutils=/tools/bin</userinput> and
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62 | <userinput>--with-headers=/tools/include</userinput>: Strictly speaking
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63 | these switches are not required. But they ensure nothing can go wrong with
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64 | regard to what kernel headers and Binutils programs get used during the
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65 | Glibc build.</para></listitem>
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66 |
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67 | <listitem><para><userinput> --without-gd</userinput>: This switch ensures
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68 | that we don't build the <userinput>memusagestat</userinput> program, which
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69 | strangely enough insists on linking against the host's libraries (libgd,
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70 | libpng, libz, and so forth).</para></listitem>
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71 | </itemizedlist>
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72 |
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73 | <para>During this stage you will see the following warning:</para>
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74 |
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75 | <blockquote><screen>configure: WARNING:
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76 | *** These auxiliary programs are missing or incompatible versions: autoconf
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77 | *** some features will be disabled.
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78 | *** Check the INSTALL file for required versions.</screen></blockquote>
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79 |
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80 | <para>The missing or incompatible <filename>autoconf</filename> program is
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81 | harmless and doesn't cause any problems.</para>
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82 |
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83 | <para>Continue with compiling the package:</para>
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84 |
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85 | <para><screen><userinput>make
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86 | make check
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87 | make install</userinput></screen></para>
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88 |
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89 | <para>The glibc make check process is highly dependent on certain functions
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90 | of your host operating system. The most common is a host that fails to mount
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91 | a tmpfs filesystem at /dev/shm, which may cause glibc tests to fail.</para>
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92 |
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93 | <para>The locales (used by Glibc to make your Linux system respond in a
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94 | different language) weren't installed when you ran the previous command,
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95 | so we have to do that ourselves now:</para>
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96 |
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97 | <para><screen><userinput>make localedata/install-locales</userinput></screen></para>
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98 |
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99 | <para>An alternative to running the previous command is to install only
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100 | those locales which you need or want. This can be achieved by using the
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101 | <userinput>localedef</userinput> command. Information on this can be
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102 | found in the <filename>INSTALL</filename> file in the
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103 | <filename>glibc-&glibc-version;</filename> tree. However, there are a
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104 | number of locales that are essential for the tests of future packages
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105 | to pass correctly, in particular, the libstdc++ tests from GCC. The following
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106 | instructions, in place of the install-locales command above, will install
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107 | the minimum set of locales necessary for the tests to run successfully:</para>
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108 |
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109 | <para><screen><userinput>mkdir -p /tools/lib/locale
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110 | localedef -i de_DE -f ISO-8859-1 de_DE
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111 | localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
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112 | localedef -i en_HK -f ISO-8859-1 en_HK
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113 | localedef -i en_PH -f ISO-8859-1 en_PH
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114 | localedef -i en_US -f ISO-8859-1 en_US
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115 | localedef -i es_MX -f ISO-8859-1 es_MX
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116 | localedef -i fr_FR -f ISO-8859-1 fr_FR
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117 | localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
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118 | localedef -i it_IT -f ISO-8859-1 it_IT
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119 | localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen></para>
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120 |
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121 | </sect2>
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122 |
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