1 | <?xml version="1.0" encoding="ISO-8859-1"?>
|
---|
2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
---|
3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
|
---|
4 | <!ENTITY % general-entities SYSTEM "../general.ent">
|
---|
5 | %general-entities;
|
---|
6 | ]>
|
---|
7 |
|
---|
8 | <sect1 id="ch-tools-glibc" role="wrap">
|
---|
9 | <?dbhtml filename="glibc.html"?>
|
---|
10 |
|
---|
11 | <sect1info condition="script">
|
---|
12 | <productname>glibc</productname>
|
---|
13 | <productnumber>&glibc-version;</productnumber>
|
---|
14 | <address>&glibc-url;</address>
|
---|
15 | </sect1info>
|
---|
16 |
|
---|
17 | <title>Glibc-&glibc-version;</title>
|
---|
18 |
|
---|
19 | <indexterm zone="ch-tools-glibc">
|
---|
20 | <primary sortas="a-Glibc">Glibc</primary>
|
---|
21 | <secondary>tools</secondary>
|
---|
22 | </indexterm>
|
---|
23 |
|
---|
24 | <sect2 role="package">
|
---|
25 | <title/>
|
---|
26 |
|
---|
27 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
|
---|
28 | href="../chapter06/glibc.xml"
|
---|
29 | xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
|
---|
30 |
|
---|
31 | <segmentedlist>
|
---|
32 | <segtitle>&buildtime;</segtitle>
|
---|
33 | <segtitle>&diskspace;</segtitle>
|
---|
34 |
|
---|
35 | <seglistitem>
|
---|
36 | <seg>&glibc-ch5-sbu;</seg>
|
---|
37 | <seg>&glibc-ch5-du;</seg>
|
---|
38 | </seglistitem>
|
---|
39 | </segmentedlist>
|
---|
40 |
|
---|
41 | </sect2>
|
---|
42 |
|
---|
43 | <sect2 role="installation">
|
---|
44 | <title>Installation of Glibc</title>
|
---|
45 |
|
---|
46 | <para>First, create two symbolic links, which are needed for proper
|
---|
47 | operation of the dynamic library loader:</para>
|
---|
48 |
|
---|
49 | <screen><userinput remap="pre">ln -sfv ../lib/ld-linux-x86-64.so.2 $LFS/lib64
|
---|
50 | ln -sfv ../lib/ld-linux-x86-64.so.2 $LFS/lib64/ld-lsb-x86-64.so.3</userinput></screen>
|
---|
51 |
|
---|
52 | <para>Some of the Glibc programs use the non-FHS compliant
|
---|
53 | <filename class="directory">/var/db</filename> directory to store their
|
---|
54 | runtime data. Apply the following patch to make such programs store their
|
---|
55 | runtime data in the FHS-compliant locations:</para>
|
---|
56 |
|
---|
57 | <screen><userinput remap="pre">patch -Np1 -i ../glibc-&glibc-version;-fhs-1.patch</userinput></screen>
|
---|
58 |
|
---|
59 | <para>The Glibc documentation recommends building Glibc
|
---|
60 | in a dedicated build directory:</para>
|
---|
61 |
|
---|
62 | <screen><userinput remap="pre">mkdir -v build
|
---|
63 | cd build</userinput></screen>
|
---|
64 |
|
---|
65 | <para>Next, prepare Glibc for compilation:</para>
|
---|
66 |
|
---|
67 | <screen><userinput remap="configure">../configure \
|
---|
68 | --prefix=/usr \
|
---|
69 | --host=$LFS_TGT \
|
---|
70 | --build=$(../scripts/config.guess) \
|
---|
71 | --enable-kernel=&min-kernel; \
|
---|
72 | --with-headers=$LFS/usr/include \
|
---|
73 | libc_cv_slibdir=/lib</userinput></screen>
|
---|
74 | <!--
|
---|
75 | libc_cv_forced_unwind=yes \
|
---|
76 | libc_cv_c_cleanup=yes</userinput></screen> -->
|
---|
77 |
|
---|
78 | <variablelist>
|
---|
79 | <title>The meaning of the configure options:</title>
|
---|
80 |
|
---|
81 | <varlistentry>
|
---|
82 | <term><parameter>--host=$LFS_TGT, --build=$(../scripts/config.guess)</parameter></term>
|
---|
83 | <listitem>
|
---|
84 | <para>The combined effect of these switches is that Glibc's build system
|
---|
85 | configures itself to be cross-compiled, using the cross-linker and
|
---|
86 | cross-compiler in <filename class="directory">/tools</filename>.</para>
|
---|
87 | </listitem>
|
---|
88 | </varlistentry>
|
---|
89 |
|
---|
90 | <varlistentry>
|
---|
91 | <term><parameter>--enable-kernel=&min-kernel;</parameter></term>
|
---|
92 | <listitem>
|
---|
93 | <para>This tells Glibc to compile the library with support
|
---|
94 | for &min-kernel; and later Linux kernels. Workarounds for older
|
---|
95 | kernels are not enabled.</para>
|
---|
96 | </listitem>
|
---|
97 | </varlistentry>
|
---|
98 |
|
---|
99 | <varlistentry>
|
---|
100 | <term><parameter>--with-headers=$LFS/usr/include</parameter></term>
|
---|
101 | <listitem>
|
---|
102 | <para>This tells Glibc to compile itself against the headers recently
|
---|
103 | installed to the usr/include directory, so that it knows exactly what
|
---|
104 | features the kernel has and can optimize itself accordingly.</para>
|
---|
105 | </listitem>
|
---|
106 | </varlistentry>
|
---|
107 |
|
---|
108 | <varlistentry>
|
---|
109 | <term><parameter>libc_cv_slibdir=/lib</parameter></term>
|
---|
110 | <listitem>
|
---|
111 | <para>This ensures that the library is installed in /lib instead
|
---|
112 | of the default /lib64 on 64 bit machines.</para>
|
---|
113 | </listitem>
|
---|
114 | </varlistentry>
|
---|
115 | <!--
|
---|
116 | <varlistentry>
|
---|
117 | <term><parameter>libc_cv_c_cleanup=yes</parameter></term>
|
---|
118 | <listitem>
|
---|
119 | <para>Similarly, we pass libc_cv_c_cleanup=yes through to the
|
---|
120 | <command>configure</command> script so that the test is skipped and C
|
---|
121 | cleanup handling support is configured.</para>
|
---|
122 | </listitem>
|
---|
123 | </varlistentry>
|
---|
124 |
|
---|
125 | <varlistentry>
|
---|
126 | <term><parameter>libc_cv_ctors_header=yes</parameter></term>
|
---|
127 | <listitem>
|
---|
128 | <para>Similarly, we pass libc_cv_ctors_header=yes through to the
|
---|
129 | <command>configure</command> script so that the test is skipped and
|
---|
130 | gcc constructor support is configured.</para>
|
---|
131 | </listitem>
|
---|
132 | </varlistentry>-->
|
---|
133 |
|
---|
134 | </variablelist>
|
---|
135 |
|
---|
136 | <para>During this stage the following warning might appear:</para>
|
---|
137 |
|
---|
138 | <blockquote>
|
---|
139 | <screen><computeroutput>configure: WARNING:
|
---|
140 | *** These auxiliary programs are missing or
|
---|
141 | *** incompatible versions: msgfmt
|
---|
142 | *** some features will be disabled.
|
---|
143 | *** Check the INSTALL file for required versions.</computeroutput></screen>
|
---|
144 | </blockquote>
|
---|
145 |
|
---|
146 | <para>The missing or incompatible <command>msgfmt</command> program is
|
---|
147 | generally harmless. This <command>msgfmt</command> program is part of the
|
---|
148 | Gettext package which the host distribution should provide.</para>
|
---|
149 |
|
---|
150 | <note><para>There have been reports that this package may fail when
|
---|
151 | building as a "parallel make". If this occurs, rerun the make command
|
---|
152 | with a "-j1" option.</para></note>
|
---|
153 |
|
---|
154 | <para>Compile the package:</para>
|
---|
155 |
|
---|
156 | <screen><userinput remap="make">make</userinput></screen>
|
---|
157 |
|
---|
158 | <para>Install the package:</para>
|
---|
159 |
|
---|
160 | <screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>
|
---|
161 |
|
---|
162 | <variablelist>
|
---|
163 | <title>The meaning of the <command>make install</command> option:</title>
|
---|
164 |
|
---|
165 | <varlistentry>
|
---|
166 | <term><parameter>DESTDIR=$LFS</parameter></term>
|
---|
167 | <listitem>
|
---|
168 | <para>The <envar>DESTDIR</envar> make variable is used by almost all
|
---|
169 | packages to define the location where the package should be
|
---|
170 | installed. If it is not set, it defaults to the root (<filename
|
---|
171 | class="directory">/</filename>) directory. Here we specify that
|
---|
172 | the package be installed in <filename class="directory">$LFS
|
---|
173 | </filename>, which will become the root after <xref linkend=
|
---|
174 | "ch-tools-chroot"/>.</para>
|
---|
175 | </listitem>
|
---|
176 | </varlistentry>
|
---|
177 |
|
---|
178 | </variablelist>
|
---|
179 |
|
---|
180 | <caution>
|
---|
181 | <para>At this point, it is imperative to stop and ensure that the basic
|
---|
182 | functions (compiling and linking) of the new toolchain are working as
|
---|
183 | expected. To perform a sanity check, run the following commands:</para>
|
---|
184 |
|
---|
185 | <screen><userinput>echo 'int main(){}' > dummy.c
|
---|
186 | $LFS_TGT-gcc dummy.c
|
---|
187 | readelf -l a.out | grep '/ld-linux'</userinput></screen>
|
---|
188 |
|
---|
189 | <para>If everything is working correctly, there should be no errors,
|
---|
190 | and the output of the last command will be of the form:</para>
|
---|
191 |
|
---|
192 | <screen><computeroutput>[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]</computeroutput></screen>
|
---|
193 |
|
---|
194 | <para>Note that for 32-bit machines, the interpreter name will be
|
---|
195 | <filename>/lib/ld-linux.so.2</filename>.</para>
|
---|
196 |
|
---|
197 | <para>If the output is not shown as above or there was no output at all,
|
---|
198 | then something is wrong. Investigate and retrace the steps to find out
|
---|
199 | where the problem is and correct it. This issue must be resolved before
|
---|
200 | continuing on.</para>
|
---|
201 |
|
---|
202 | <para>Once all is well, clean up the test files:</para>
|
---|
203 |
|
---|
204 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
|
---|
205 |
|
---|
206 | </caution>
|
---|
207 |
|
---|
208 | <note><para>Building packages in the next sections will serve as an
|
---|
209 | additional check that the toolchain has been built properly. If some
|
---|
210 | package, especially binutils-pass2 or gcc-pass2, fails to build, it is
|
---|
211 | an indication that something has gone wrong with the
|
---|
212 | previous Binutils, GCC, or Glibc installations.</para></note>
|
---|
213 |
|
---|
214 | <para>Now that our cross-toolchain is complete, finalize the installation
|
---|
215 | of the limits.h header. For doing so, run an utility provided by the GCC
|
---|
216 | developers:</para>
|
---|
217 |
|
---|
218 | <screen><userinput>$LFS/tools/libexec/gcc/$LFS_TGT/&gcc-version;/install-tools/mkheaders</userinput></screen>
|
---|
219 |
|
---|
220 | </sect2>
|
---|
221 |
|
---|
222 | <sect2 role="content">
|
---|
223 | <title/>
|
---|
224 |
|
---|
225 | <para>Details on this package are located in
|
---|
226 | <xref linkend="contents-glibc" role="."/></para>
|
---|
227 |
|
---|
228 | </sect2>
|
---|
229 |
|
---|
230 | </sect1>
|
---|