[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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| 3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 4 | %general-entities;
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| 5 | ]>
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[3be4d97] | 6 | <sect1 id="ch-tools-glibc">
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[673b0d8] | 7 | <title>Glibc-&glibc-version;</title>
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| 8 | <?dbhtml filename="glibc.html"?>
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[bc82645e] | 9 |
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[673b0d8] | 10 | <indexterm zone="ch-tools-glibc">
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| 11 | <primary sortas="a-Glibc">Glibc</primary>
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| 12 | <secondary>tools</secondary></indexterm>
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[bc82645e] | 13 |
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[673b0d8] | 14 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="../chapter06/glibc.xml" xpointer="xpointer(/sect1/para[1])"/>
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| 15 |
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| 16 | <screen>&buildtime; 11.8 SBU
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| 17 | &diskspace; 800 MB</screen>
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| 18 |
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| 19 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="../chapter06/glibc.xml" xpointer="xpointer(/sect1/para[2])"/>
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[73aedd1d] | 20 |
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| 21 |
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| 22 | <sect2>
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[5888299] | 23 | <title>Installation of Glibc</title>
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[73aedd1d] | 24 |
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[ede9b9b] | 25 | <para>This package is known to behave badly when you change its default
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| 26 | optimization flags (including the <emphasis>-march</emphasis> and
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| 27 | <emphasis>-mcpu</emphasis> options). Therefore, if you have defined any
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| 28 | environment variables that override default optimizations, such as CFLAGS and
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[673b0d8] | 29 | CXXFLAGS, we recommend un-setting them when building Glibc.</para>
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[73aedd1d] | 30 |
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| 31 | <para>Basically, compiling Glibc in any other way than the book suggests
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| 32 | is putting the stability of your system at risk.</para>
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| 33 |
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| 34 | <para>The Glibc documentation recommends building Glibc outside of the source
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| 35 | directory in a dedicated build directory:</para>
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| 36 |
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| 37 | <screen><userinput>mkdir ../glibc-build
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| 38 | cd ../glibc-build</userinput></screen>
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| 39 |
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[d27a27b] | 40 | <para>Next, prepare Glibc for compilation:</para>
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[73aedd1d] | 41 |
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[9dfc02f] | 42 | <screen><userinput>../glibc-&glibc-version;/configure --prefix=/tools \
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| 43 | --disable-profile --enable-add-ons=nptl --with-tls \
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| 44 | --with-binutils=/tools/bin --without-gd --without-cvs \
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| 45 | --with-headers=/tools/glibc-kernheaders</userinput></screen>
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[73aedd1d] | 46 |
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| 47 | <para>The meaning of the configure options:</para>
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| 48 |
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| 49 | <itemizedlist>
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[9dfc02f] | 50 | <listitem><para><userinput>--disable-profile</userinput>: This builds the
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| 51 | libraries without profiling information. Omit this option if you plan to do
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| 52 | profiling on the temporary tools.</para></listitem>
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[73aedd1d] | 53 |
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[9dfc02f] | 54 | <listitem><para><userinput>--enable-add-ons=nptl</userinput>: This
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| 55 | tells Glibc to use the NPTL add-on as its threading library.</para></listitem>
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[73aedd1d] | 56 |
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[9dfc02f] | 57 | <listitem><para><userinput>--with-tls</userinput>: This tells Glibc to include
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| 58 | support for TLS (thread-local storage). This is required for NPTL to work.
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| 59 | </para></listitem>
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[73aedd1d] | 60 |
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[9dfc02f] | 61 | <listitem><para><userinput>--with-binutils=/tools/bin</userinput>: Strictly
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| 62 | speaking this switch is not required. But it does ensure nothing can go wrong
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| 63 | with regard to what Binutils programs get used during the Glibc build.</para></listitem>
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| 64 |
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| 65 | <listitem><para><userinput>--without-gd</userinput>: This prevents the build
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| 66 | of the <command>memusagestat</command> program, which strangely enough insists
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| 67 | on linking against the host's libraries (libgd, libpng, libz, and so forth).
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| 68 | </para></listitem>
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[d0a6c4c] | 69 |
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| 70 | <listitem><para><userinput>--without-cvs</userinput>: This is meant to prevent
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[c76accc] | 71 | the Makefiles from attempting automatic CVS checkouts when using a CVS
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| 72 | snapshot. But it's not actually needed these days. We use it because it
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| 73 | suppresses an annoying but harmless warning about a missing
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| 74 | <command>autoconf</command> program.</para></listitem>
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[9dfc02f] | 75 |
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| 76 | <listitem><para><userinput>--with-headers=/tools/glibc-kernheaders</userinput>:
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| 77 | This tells Glibc to compile against the <quote>raw</quote> kernel headers, so
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| 78 | that it knows exactly what features the kernel has, and can optimize itself
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| 79 | accordingly. Not strictly necessary, but nice to have.</para></listitem>
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[73aedd1d] | 80 | </itemizedlist>
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| 81 |
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| 82 | <para>During this stage you might see the following warning:</para>
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| 83 |
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| 84 | <blockquote><screen>configure: WARNING:
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| 85 | *** These auxiliary programs are missing or incompatible versions: msgfmt
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| 86 | *** some features will be disabled.
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| 87 | *** Check the INSTALL file for required versions.</screen></blockquote>
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| 88 |
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[ede9b9b] | 89 | <para>The missing or incompatible <command>msgfmt</command> program is
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[73aedd1d] | 90 | generally harmless, but it's believed it can sometimes cause problems when
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| 91 | running the test suite.</para>
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| 92 |
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| 93 | <para>Compile the package:</para>
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| 94 |
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| 95 | <screen><userinput>make</userinput></screen>
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| 96 |
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[ede9b9b] | 97 | <para>Compilation is now complete. As mentioned earlier, we don't recommend
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[443cace] | 98 | running the test suites for the temporary system here in this chapter. If you
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| 99 | still want to run the Glibc test suite anyway, the following command will do
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| 100 | so:</para>
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[73aedd1d] | 101 |
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| 102 | <screen><userinput>make check</userinput></screen>
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| 103 |
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| 104 | <para>The Glibc test suite is highly dependent on certain functions of your host
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| 105 | system, in particular the kernel. Additionally, here in this chapter some tests
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| 106 | can be adversely affected by existing tools or environmental issues on the host
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| 107 | system. Of course, these won't be a problem when we run the Glibc test suite
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[ede9b9b] | 108 | inside the chroot environment of <xref linkend="chapter-building-system"/>. In
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| 109 | general, the Glibc test suite is always expected to pass. However, as mentioned
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| 110 | above, in certain circumstances some failures are unavoidable. Here is a list
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| 111 | of the most common issues we are aware of:</para>
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[73aedd1d] | 112 |
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| 113 | <itemizedlist>
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| 114 | <listitem><para>The <emphasis>math</emphasis> tests sometimes fail when running
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| 115 | on systems where the CPU is not a relatively new genuine Intel or authentic AMD.
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| 116 | Certain optimization settings are also known to be a factor here.</para></listitem>
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| 117 |
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| 118 | <listitem><para>The <emphasis>gettext</emphasis> test sometimes fails due to
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| 119 | host system issues. The exact reasons are not yet clear.</para></listitem>
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| 120 |
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| 121 | <listitem><para>The <emphasis>atime</emphasis> test sometimes fails when the
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| 122 | LFS partition is mounted with the <emphasis>noatime</emphasis> option, or due
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| 123 | to other file system quirks.</para></listitem>
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| 124 |
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| 125 | <listitem><para>The <emphasis>shm</emphasis> test might fail when the host
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| 126 | system is running the devfs file system but doesn't have the tmpfs file system
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| 127 | mounted at <filename>/dev/shm</filename> due to lack of support for tmpfs in
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| 128 | the kernel.</para></listitem>
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| 129 |
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| 130 | <listitem><para>When running on older and slower hardware, some tests might
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| 131 | fail due to test timeouts being exceeded.</para></listitem>
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| 132 | </itemizedlist>
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| 133 |
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| 134 | <para>In summary, don't worry too much if you see Glibc test suite failures
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[ede9b9b] | 135 | here in this chapter. The Glibc in <xref linkend="chapter-building-system"/> is
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| 136 | the one we'll ultimately end up using, so that is the one we would really like
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| 137 | to see pass the tests (but even there some failures could still occur -- the
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| 138 | <emphasis>math</emphasis> tests, for example). When experiencing a failure,
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| 139 | make a note of it, then continue by reissuing the <command>make
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| 140 | check</command>. The test suite should pick up where it left off and continue.
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| 141 | You can circumvent this stop-start sequence by issuing a <command>make -k
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| 142 | check</command>. But if you do that, be sure to log the output so that you can
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| 143 | later peruse the log file and examine the total number of failures.</para>
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| 144 |
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| 145 | <para>Though it is a harmless message, the install stage of Glibc will at the
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| 146 | end complain about the absence of <filename>/tools/etc/ld.so.conf</filename>.
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| 147 | Prevent this confusing little warning with:</para>
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[1caa48e] | 148 |
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| 149 | <screen><userinput>mkdir /tools/etc
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| 150 | touch /tools/etc/ld.so.conf</userinput></screen>
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| 151 |
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[73aedd1d] | 152 | <para>Now install the package:</para>
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| 153 |
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| 154 | <screen><userinput>make install</userinput></screen>
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| 155 |
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| 156 | <para>Different countries and cultures have varying conventions for how to
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| 157 | communicate. These conventions range from very simple ones, such as the format
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| 158 | for representing dates and times, to very complex ones, such as the language
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[673b0d8] | 159 | spoken. The <quote>internationalization</quote> of GNU programs works by means
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| 160 | of <emphasis>locales</emphasis>.</para>
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[443cace] | 161 |
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| 162 | <note><para>If you are not running the test suites here in this chapter as per
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| 163 | our recommendation, there is little point in installing the locales now. We'll
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| 164 | be installing the locales in the next chapter.</para></note>
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| 165 |
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| 166 | <para>If you still want to install the Glibc locales anyway, the following
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| 167 | command will do so:</para>
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[73aedd1d] | 168 |
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| 169 | <screen><userinput>make localedata/install-locales</userinput></screen>
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| 170 |
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[d0a6c4c] | 171 | <para>An alternative to running the previous command is to install only those
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| 172 | locales which you need or want. This can be achieved by using the
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[90e3cb3] | 173 | <command>localedef</command> command. Information on this can be found in
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[d0a6c4c] | 174 | the <filename>INSTALL</filename> file in the Glibc source. However, there are
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| 175 | a number of locales that are essential for the tests of future packages to
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| 176 | pass, in particular, the <emphasis>libstdc++</emphasis> tests from GCC. The
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| 177 | following instructions, instead of the install-locales target above, will
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| 178 | install the minimum set of locales necessary for the tests to run
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| 179 | successfully:</para>
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[73aedd1d] | 180 |
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| 181 | <screen><userinput>mkdir -p /tools/lib/locale
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| 182 | localedef -i de_DE -f ISO-8859-1 de_DE
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| 183 | localedef -i de_DE@euro -f ISO-8859-15 de_DE@euro
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| 184 | localedef -i en_HK -f ISO-8859-1 en_HK
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| 185 | localedef -i en_PH -f ISO-8859-1 en_PH
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| 186 | localedef -i en_US -f ISO-8859-1 en_US
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| 187 | localedef -i es_MX -f ISO-8859-1 es_MX
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[efb32ca] | 188 | localedef -i fa_IR -f UTF-8 fa_IR
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[73aedd1d] | 189 | localedef -i fr_FR -f ISO-8859-1 fr_FR
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| 190 | localedef -i fr_FR@euro -f ISO-8859-15 fr_FR@euro
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| 191 | localedef -i it_IT -f ISO-8859-1 it_IT
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| 192 | localedef -i ja_JP -f EUC-JP ja_JP</userinput></screen>
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| 193 |
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| 194 | </sect2>
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[bc82645e] | 195 |
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[0868461] | 196 | <sect2><title/>
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[5888299] | 197 | <para>The details on this package are found in <xref linkend="contents-glibc"/>.</para>
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[0868461] | 198 | </sect2>
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[5888299] | 199 |
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[bc82645e] | 200 | </sect1>
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