[bc82645e] | 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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[684183e] | 8 | Glibc-linuxthreads in that directory, not in the directory where you usually
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| 9 | unpack all the sources.</para>
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[bc82645e] | 10 |
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[39dbad2] | 11 | <note><para>We are going to run the test suite for Glibc in this chapter.
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[1668d8e] | 12 | However, it's worth pointing out that running the Glibc test suite here
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| 13 | is considered not as important as running it in Chapter 6.</para></note>
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[1f53626] | 14 |
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[bc82645e] | 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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[66e4325] | 22 | is putting the stability of your system at risk.</para>
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[bc82645e] | 23 |
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[1179ee9] | 24 | <para>Though it is a harmless message, the install stage of Glibc will
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[c94dd38] | 25 | complain about the absence of <filename>/tools/etc/ld.so.conf</filename>.
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[66e4325] | 26 | Fix this annoying little error with:</para>
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[1179ee9] | 27 |
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[21ba4e3] | 28 | <screen><userinput>mkdir /tools/etc
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| 29 | touch /tools/etc/ld.so.conf</userinput></screen>
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[1179ee9] | 30 |
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[79b94bd] | 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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[21ba4e3] | 34 | <screen><userinput>patch -Np1 -i ../&glibc-sscanf-patch;</userinput></screen>
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[79b94bd] | 35 |
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[677aef3] | 36 | <para>The Glibc documentation recommends building Glibc outside of the source
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| 37 | directory in a dedicated build directory:</para>
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[bc82645e] | 38 |
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[21ba4e3] | 39 | <screen><userinput>mkdir ../glibc-build
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| 40 | cd ../glibc-build</userinput></screen>
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[bc82645e] | 41 |
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| 42 | <para>Next, prepare Glibc to be compiled:</para>
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| 43 |
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[21ba4e3] | 44 | <screen><userinput>../glibc-&glibc-version;/configure --prefix=/tools \
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[bc82645e] | 45 | --disable-profile --enable-add-ons \
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[148bb04] | 46 | --with-headers=/tools/include \
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| 47 | --with-binutils=/tools/bin \
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[21ba4e3] | 48 | --without-gd</userinput></screen>
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[bc82645e] | 49 |
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[aa49729] | 50 | <para>The meaning of the configure options:</para>
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[bc82645e] | 51 |
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| 52 | <itemizedlist>
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| 53 | <listitem><para><userinput>--disable-profile</userinput>: This disables the
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| 54 | building of the libraries with profiling information. Omit this option if you
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| 55 | plan to do profiling.</para></listitem>
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| 56 |
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| 57 | <listitem><para><userinput>--enable-add-ons</userinput>: This enables any
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[66e4325] | 58 | add-ons that were installed with Glibc, in our case Linuxthreads.</para></listitem>
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| 59 |
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[148bb04] | 60 | <listitem><para><userinput>--with-binutils=/tools/bin</userinput> and
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| 61 | <userinput>--with-headers=/tools/include</userinput>: Strictly speaking
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[66e4325] | 62 | these switches are not required. But they ensure nothing can go wrong with
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| 63 | regard to what kernel headers and Binutils programs get used during the
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| 64 | Glibc build.</para></listitem>
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| 65 |
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| 66 | <listitem><para><userinput> --without-gd</userinput>: This switch ensures
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| 67 | that we don't build the <userinput>memusagestat</userinput> program, which
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| 68 | strangely enough insists on linking against the host's libraries (libgd,
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| 69 | libpng, libz, and so forth).</para></listitem>
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[bc82645e] | 70 | </itemizedlist>
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| 71 |
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[96dfe0f5] | 72 | <para>During this stage you might see the following warning:</para>
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[bc82645e] | 73 |
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[fbd407f] | 74 | <blockquote><screen>configure: WARNING:
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[1cb7ced] | 75 | *** These auxiliary programs are missing or incompatible versions: msgfmt
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[bc82645e] | 76 | *** some features will be disabled.
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| 77 | *** Check the INSTALL file for required versions.</screen></blockquote>
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| 78 |
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[1cb7ced] | 79 | <para>The missing or incompatible <filename>msgfmt</filename> program is
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[4fa86d1] | 80 | generally harmless, but it's believed it can sometimes cause problems when
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| 81 | running the test suite.</para>
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[bc82645e] | 82 |
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[4fa86d1] | 83 | <para>Compile the package:</para>
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[bc82645e] | 84 |
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[21ba4e3] | 85 | <screen><userinput>make</userinput></screen>
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[bc82645e] | 86 |
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[4fa86d1] | 87 | <para>Run the test suite:</para>
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[431f48d1] | 88 |
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[21ba4e3] | 89 | <screen><userinput>make check</userinput></screen>
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[4fa86d1] | 90 |
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| 91 | <para>The Glibc test suite is highly dependent on certain functions of your host
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[1668d8e] | 92 | system, in particular the kernel. Additionally, here in Chapter 5 some tests
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[4fa86d1] | 93 | can be adversely affected by existing tools or environmental issues on the host
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| 94 | system. Of course, these won't be a problem when we run the Glibc test suite
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| 95 | inside the chroot environment of Chapter 6. In general, the Glibc test suite is
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| 96 | always expected to pass. However, as mentioned above, some failures are
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| 97 | unavoidable in certain circumstances. Here is a list of the most common issues
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| 98 | we are aware of:</para>
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| 99 |
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| 100 | <itemizedlist>
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[1668d8e] | 101 | <listitem><para>The <emphasis>math</emphasis> tests sometimes fail when running
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| 102 | on systems where the CPU is not a relatively new genuine Intel or authentic AMD.
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| 103 | Certain optimization settings are also known to be a factor here.</para></listitem>
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[4fa86d1] | 104 |
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[1668d8e] | 105 | <listitem><para>The <emphasis>gettext</emphasis> test sometimes fails due to
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| 106 | host system issues. The exact reasons are not yet clear.</para></listitem>
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[4fa86d1] | 107 |
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[1668d8e] | 108 | <listitem><para>The <emphasis>atime</emphasis> test sometimes fails when the
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| 109 | LFS partition is mounted with the <emphasis>noatime</emphasis> option, or due
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| 110 | to other file system quirks.</para></listitem>
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[4fa86d1] | 111 |
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[1668d8e] | 112 | <listitem><para>The <emphasis>shm</emphasis> test might fail when the host
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| 113 | system is running the devfs file system but doesn't have the tmpfs file system
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| 114 | mounted at <filename>/dev/shm</filename> due to lack of support for tmpfs in
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| 115 | the kernel.</para></listitem>
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[4fa86d1] | 116 |
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[1668d8e] | 117 | <listitem><para>When running on older and slower hardware, some tests might
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| 118 | fail due to test timeouts being exceeded.</para></listitem>
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[4fa86d1] | 119 | </itemizedlist>
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| 120 |
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| 121 | <para>In summary, don't worry too much if you see Glibc test suite failures here
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| 122 | in Chapter 5. The Glibc in Chapter 6 is the one we'll ultimately end up using so
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[05ed965] | 123 | that is the one we would really like to see pass. But please keep in mind, even
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[1668d8e] | 124 | in Chapter 6 some failures could still occur -- the <emphasis>math</emphasis>
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| 125 | tests for example. When experiencing a failure, make a note of it, then
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| 126 | continue by reissuing the <userinput>make check</userinput>. The test suite
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| 127 | should pick up where it left off and continue on. You can circumvent this
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| 128 | stop-start sequence by issuing a <userinput>make -k check</userinput>. But if
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| 129 | you do that, be sure to log the output so that you can later peruse the log
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| 130 | file and examine the total number of failures.</para>
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[4fa86d1] | 131 |
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| 132 | <para>Now install the package:</para>
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| 133 |
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[21ba4e3] | 134 | <screen><userinput>make install</userinput></screen>
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[4fa86d1] | 135 |
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| 136 | <para>Different countries and cultures have varying conventions for how to
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| 137 | communicate. These conventions range from very simple ones, such as the format
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| 138 | for representing dates and times, to very complex ones, such as the language
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[1668d8e] | 139 | spoken. The "internationalization" of GNU programs works by means of
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| 140 | <emphasis>locales</emphasis>. We'll install the Glibc locales now:</para>
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[bc82645e] | 141 |
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[21ba4e3] | 142 | <screen><userinput>make localedata/install-locales</userinput></screen>
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[bc82645e] | 143 |
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[66e4325] | 144 | <para>An alternative to running the previous command is to install only
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| 145 | those locales which you need or want. This can be achieved by using the
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| 146 | <userinput>localedef</userinput> command. Information on this can be
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| 147 | found in the <filename>INSTALL</filename> file in the
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[1668d8e] | 148 | <filename>glibc-&glibc-version;</filename> source. However, there are a number
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| 149 | of locales that are essential for the tests of future packages to pass, in
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| 150 | particular, the <emphasis>libstdc++</emphasis> tests from GCC. The following
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| 151 | instructions, instead of the install-locales target above, will install
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[fbb00ac] | 152 | the minimum set of locales necessary for the tests to run successfully:</para>
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[c825bdc] | 153 |
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[21ba4e3] | 154 | <screen><userinput>mkdir -p /tools/lib/locale
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[c825bdc] | 155 | localedef -i de_DE -f ISO-8859-1 de_DE
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| 156 | localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
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| 157 | localedef -i en_HK -f ISO-8859-1 en_HK
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| 158 | localedef -i en_PH -f ISO-8859-1 en_PH
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| 159 | localedef -i en_US -f ISO-8859-1 en_US
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| 160 | localedef -i es_MX -f ISO-8859-1 es_MX
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| 161 | localedef -i fr_FR -f ISO-8859-1 fr_FR
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| 162 | localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
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| 163 | localedef -i it_IT -f ISO-8859-1 it_IT
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[21ba4e3] | 164 | localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen>
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[bc82645e] | 165 |
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| 166 | </sect2>
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| 167 |
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