source: BOOK/cross-tools/alpha/eglibc-headers.xml @ 65ab9ce

clfs-2.1clfs-3.0.0-systemdclfs-3.0.0-sysvinitsystemdsysvinit
Last change on this file since 65ab9ce was 65ab9ce, checked in by William Harrington <kb0iic@…>, 7 years ago

Update host system requirements. Book's supported linux kernel version is 2.6.32 or greater.

  • Property mode set to 100644
File size: 6.3 KB
Line 
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-cross-tools-eglibc-headers" role="wrap">
9  <?dbhtml filename="eglibc-headers.html"?>
10
11  <title>EGLIBC-&eglibc-version; Headers</title>
12
13  <indexterm zone="ch-cross-tools-eglibc-headers">
14    <primary sortas="a-EGLIBC">EGLIBC</primary>
15    <secondary>cross tools, headers</secondary>
16  </indexterm>
17
18  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
19  href="../../final-system/common/eglibc.xml"
20  xpointer="xpointer(//*[@role='package'])"/>
21
22  <sect2 role="installation">
23    <title>Installation of EGLIBC Headers</title>
24
25    <para os="s1">EGLIBC's <filename>configure</filename> script checks the
26    version of GCC, and will fail if it's less than 3.4. The next EGLIBC build
27    will use the GCC that will be installed into
28    <filename class="directory">/cross-tools</filename> in the next step.
29    However, in this step only the EGLIBC headers are being installed - no
30    compiling is taking place - so the GCC version isn't important. The
31    following sed removes the dependency of GCC 3.4.x:</para>
32
33<screen os="s2"><userinput>cp -v configure{,.orig}
34sed -e 's/3.4/3.[0-9]/g' configure.orig &gt; configure</userinput></screen>
35
36    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
37    href="../../final-system/common/eglibc.xml"
38    xpointer="xpointer(//*[@os='e'])"/>
39
40    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
41    href="../../final-system/common/eglibc.xml"
42    xpointer="xpointer(//*[@os='f'])"/>
43
44    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
45    href="../common/eglibc.xml"
46    xpointer="xpointer(//*[@os='dd'])"/>
47
48<screen os="de"><userinput>cat &gt; config.cache &lt;&lt; "EOF"
49libc_cv_forced_unwind=yes
50libc_cv_c_cleanup=yes
51libc_cv_mlong_double_128=yes
52libc_cv_alpha_tls=yes
53libc_cv_gnu89_inline=yes
54libc_cv_ssp=no
55EOF</userinput></screen>
56
57    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
58    href="../../final-system/common/eglibc.xml"
59    xpointer="xpointer(//*[@os='g'])"/>
60
61<screen os="s3"><userinput>CC=gcc ../eglibc-&eglibc-version;/configure --prefix=/tools \
62   --host=${CLFS_TARGET} --build=${CLFS_HOST} \
63   --disable-sanity-checks --enable-kernel=2.6.32 \
64   --with-headers=/tools/include --cache-file=config.cache \
65   --with-binutils=/cross-tools/${CLFS_TARGET}/bin</userinput></screen>
66
67    <note os="e1">
68      <para><emphasis>Any</emphasis> error message you see about nptl at this point
69      can safely be ignored.</para>
70   </note>
71
72    <variablelist os="ca">
73       <title>The meaning of the configure options:</title>
74
75          <varlistentry os="ca1">
76             <term><parameter>CC=gcc</parameter></term>
77             <listitem>
78                <para>Tells EGLIBC to use the host's GCC compiler.</para>
79             </listitem>
80          </varlistentry>
81
82         <varlistentry os="ca2">
83            <term><parameter>--prefix=/tools</parameter></term>
84            <listitem>
85               <para>This tells the configure script to prepare to install the
86                   package in the <filename class="directory">/tools</filename>
87                   directory.</para>
88             </listitem>
89         </varlistentry>
90
91         <varlistentry os="ca3">
92            <term><parameter>--build=${CLFS_HOST}</parameter></term>
93            <listitem>
94               <para>When used with --host, this creates a cross-architecture
95                  executable that creates files for ${CLFS_TARGET} but runs on ${CLFS_HOST}.</para>
96            </listitem>
97        </varlistentry>
98
99        <varlistentry os="ca4">
100           <term><parameter>--host=${CLFS_TARGET}</parameter></term>
101           <listitem>
102               <para>When used with --build, this creates a cross-architecture
103                  executable that creates files for ${CLFS_TARGET} but runs on ${CLFS_HOST}.</para>
104           </listitem>
105        </varlistentry>
106
107       <varlistentry os="ca5">
108          <term><parameter>--disable-sanity-checks</parameter></term>
109          <listitem>
110             <para>This switch disables any checks that are in place.</para>
111           </listitem>
112       </varlistentry>
113
114       <varlistentry os="ca6">
115            <term><parameter>--enable-kernel=2.6.32</parameter></term>
116            <listitem>
117               <para>This tells EGLIBC to compile the library with support
118               for 2.6.32 and later Linux kernels.</para>
119            </listitem>
120       </varlistentry>
121
122       <varlistentry os="ca7">
123           <term><parameter>--with-headers=/tools/include</parameter></term>
124           <listitem>
125              <para>This tells EGLIBC to compile itself against the headers
126              recently installed to the <filename class="directory">/tools</filename>
127              directory, so that it knows exactly what features the kernel has
128              and can optimize itself accordingly.</para>
129           </listitem>
130       </varlistentry>
131
132       <varlistentry os="ca8">
133           <term><parameter>--with-binutils=/cross-tools/${CLFS_TARGET}/bin</parameter></term>
134           <listitem>
135              <para>This tells EGLIBC to use the Binutils for our specific target architecture.</para>
136            </listitem>
137       </varlistentry>
138
139       </variablelist>
140
141   <para os="cb">Now, install the headers:</para>
142
143<screen os="cd"><userinput>make install-headers</userinput></screen>
144
145   <para os="ce">Some files aren't installed by the above command, so
146    we will copy the additional header files we need.</para>
147
148   <para os="cf">First we will copy a common file over to <filename
149   class="directory">/tools/include</filename>:</para>
150
151<screen os="cg"><userinput>install -dv /tools/include/bits
152cp -v bits/stdio_lim.h /tools/include/bits</userinput></screen>
153
154   <para os="ch">Now we will create a blank stub file:</para>
155
156<screen os="ci"><userinput>touch /tools/include/gnu/stubs.h</userinput></screen>
157
158   <para os="cj">Another header is needed for NPTL:</para>
159
160<screen><userinput>cp -v ../eglibc-&eglibc-version;/nptl/sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h \
161    /tools/include/bits/</userinput></screen>
162
163  </sect2>
164
165  <sect2 role="content">
166    <title/>
167
168    <para>Details on this package are located in <xref
169    linkend="contents-eglibc" role="."/></para>
170
171  </sect2>
172
173</sect1>
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