1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
---|
2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" |
---|
3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [ |
---|
4 | <!ENTITY % general-entities SYSTEM "../../general.ent"> |
---|
5 | %general-entities; |
---|
6 | ]> |
---|
7 | |
---|
8 | <sect1 id="ch-cross-tools-glibc-headers" role="wrap"> |
---|
9 | <?dbhtml filename="glibc-headers.html"?> |
---|
10 | |
---|
11 | <title>Glibc-&glibc-version; Headers</title> |
---|
12 | |
---|
13 | <indexterm zone="ch-cross-tools-glibc-headers"> |
---|
14 | <primary sortas="a-Glibc">Glibc</primary> |
---|
15 | <secondary>cross tools, headers</secondary> |
---|
16 | </indexterm> |
---|
17 | |
---|
18 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
---|
19 | href="../../final-system/common/glibc.xml" |
---|
20 | xpointer="xpointer(//*[@role='package'])"/> |
---|
21 | |
---|
22 | <sect2 role="installation"> |
---|
23 | <title>Installation of Glibc Headers</title> |
---|
24 | |
---|
25 | <para os="s1">The following sed removes a dependency of gcc 3.4.x from |
---|
26 | the glibc used in cross-lfs. The reason it is changed is |
---|
27 | because only the headers are being installed now; no compiling takes place. |
---|
28 | In the next glibc build, the gcc that's built right after this section will be used.</para> |
---|
29 | |
---|
30 | <screen os="s2"><userinput>cp -v configure{,.orig} |
---|
31 | sed -e 's/3.4/3.[0-9]/g' configure.orig > configure</userinput></screen> |
---|
32 | |
---|
33 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
---|
34 | href="../../final-system/common/glibc.xml" |
---|
35 | xpointer="xpointer(//*[@os='e'])"/> |
---|
36 | |
---|
37 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
---|
38 | href="../../final-system/common/glibc.xml" |
---|
39 | xpointer="xpointer(//*[@os='f'])"/> |
---|
40 | |
---|
41 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
---|
42 | href="../common/glibc.xml" |
---|
43 | xpointer="xpointer(//*[@os='dd'])"/> |
---|
44 | |
---|
45 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
---|
46 | href="../common/glibc.xml" |
---|
47 | xpointer="xpointer(//*[@os='de'])"/> |
---|
48 | |
---|
49 | <para os="df">Glibc has an issue cross-compiling the headers, where it can |
---|
50 | misdetect the capabilities of Binutils and decide they are inadequate. The |
---|
51 | following line fixes this:</para> |
---|
52 | |
---|
53 | <screen os="dg"><userinput>echo "libc_cv_initfini_array=yes" >> config.cache |
---|
54 | </userinput></screen> |
---|
55 | |
---|
56 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
---|
57 | href="../../final-system/common/glibc.xml" |
---|
58 | xpointer="xpointer(//*[@os='g'])"/> |
---|
59 | |
---|
60 | <screen os="s3"><userinput>CC=gcc ../glibc-&glibc-version;/configure --prefix=/tools \ |
---|
61 | --host=${LFS_TARGET} --build=${LFS_HOST} \ |
---|
62 | --disable-sanity-checks --enable-kernel=2.6.0 \ |
---|
63 | --with-headers=/tools/include --cache-file=config.cache \ |
---|
64 | --with-binutils=/cross-tools/${LFS_TARGET}/bin</userinput></screen> |
---|
65 | |
---|
66 | <note os="e1"> |
---|
67 | <para><emphasis>Any</emphasis> error message you see about nptl at this |
---|
68 | point can safely be ignored.</para> |
---|
69 | </note> |
---|
70 | |
---|
71 | <variablelist os="ca"> |
---|
72 | <title>The meaning of the configure options:</title> |
---|
73 | |
---|
74 | <varlistentry os="ca1"> |
---|
75 | <term><parameter>CC=gcc</parameter></term> |
---|
76 | <listitem> |
---|
77 | <para>Tells Glibc to use the host's GCC compiler.</para> |
---|
78 | </listitem> |
---|
79 | </varlistentry> |
---|
80 | |
---|
81 | <varlistentry os="ca2"> |
---|
82 | <term><parameter>--build=${LFS_HOST}</parameter></term> |
---|
83 | <listitem> |
---|
84 | <para>When used with --host, this creates a cross-architecture |
---|
85 | executable that creates files for ${LFS_TARGET} but runs on ${LFS_HOST).</para> |
---|
86 | </listitem> |
---|
87 | </varlistentry> |
---|
88 | |
---|
89 | <varlistentry os="ca3"> |
---|
90 | <term><parameter>--host=${LFS_TARGET}</parameter></term> |
---|
91 | <listitem> |
---|
92 | <para>When used with --build, this creates a cross-architecture |
---|
93 | executable that creates files for ${LFS_TARGET} but runs on ${LFS_HOST).</para> |
---|
94 | </listitem> |
---|
95 | </varlistentry> |
---|
96 | |
---|
97 | <varlistentry os="ca4"> |
---|
98 | <term><parameter>--disable-sanity-checks</parameter></term> |
---|
99 | <listitem> |
---|
100 | <para>This switch disables any checks that are in place.</para> |
---|
101 | </listitem> |
---|
102 | </varlistentry> |
---|
103 | |
---|
104 | <varlistentry os="ca5"> |
---|
105 | <term><parameter>--enable-kernel=2.6.0</parameter></term> |
---|
106 | <listitem> |
---|
107 | <para>This tells Glibc to compile the library with support |
---|
108 | for 2.6.x Linux kernels.</para> |
---|
109 | </listitem> |
---|
110 | </varlistentry> |
---|
111 | |
---|
112 | <varlistentry os="ca6"> |
---|
113 | <term><parameter>--with-headers=/tools/include</parameter></term> |
---|
114 | <listitem> |
---|
115 | <para>This tells Glibc to compile itself against the headers |
---|
116 | recently installed to the <filename class="directory">/tools</filename> |
---|
117 | directory, so that it knows exactly what features the kernel has |
---|
118 | and can optimize itself accordingly.</para> |
---|
119 | </listitem> |
---|
120 | </varlistentry> |
---|
121 | |
---|
122 | <varlistentry os="ca7"> |
---|
123 | <term><parameter>--with-binutils=/cross-tools/${LFS_TARGET}/bin</parameter></term> |
---|
124 | <listitem> |
---|
125 | <para>This tells Glibc to use the binutils for the specific target architecture.</para> |
---|
126 | </listitem> |
---|
127 | </varlistentry> |
---|
128 | |
---|
129 | </variablelist> |
---|
130 | |
---|
131 | <para os="cb">Now, install the headers:</para> |
---|
132 | |
---|
133 | <screen os="cd"><userinput>make install-headers</userinput></screen> |
---|
134 | |
---|
135 | <para os="ce">Some files aren't installed by the above command, so copy the additional header files that are needed:</para> |
---|
136 | |
---|
137 | <para os="cf">First copy a common file over to <filename |
---|
138 | class="directory">/tools/include</filename>:</para> |
---|
139 | |
---|
140 | <screen os="cg"><userinput>cp -v bits/stdio_lim.h /tools/include/bits</userinput></screen> |
---|
141 | |
---|
142 | <para os="ch">Now create a blank stub file:</para> |
---|
143 | |
---|
144 | <screen os="ci"><userinput>touch /tools/include/gnu/stubs.h</userinput></screen> |
---|
145 | |
---|
146 | <para os="cj">For NPTL use the following command:</para> |
---|
147 | |
---|
148 | <screen os="ck"><userinput>cp -v \ |
---|
149 | ../glibc-&glibc-version;/nptl/sysdeps/pthread/pthread.h \ |
---|
150 | /tools/include</userinput></screen> |
---|
151 | |
---|
152 | <para os="cl">Now copy the architecture specific header over:</para> |
---|
153 | |
---|
154 | <screen os="cm"><userinput>cp -v \ |
---|
155 | ../glibc-&glibc-version;/nptl/sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h \ |
---|
156 | /tools/include/bits</userinput></screen> |
---|
157 | |
---|
158 | </sect2> |
---|
159 | |
---|
160 | <sect2 role="content"> |
---|
161 | <title/> |
---|
162 | |
---|
163 | <para>Details on this package are located in <xref |
---|
164 | linkend="contents-glibc" role="."/></para> |
---|
165 | |
---|
166 | </sect2> |
---|
167 | |
---|
168 | </sect1> |
---|