[3f8be484] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" |
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| 3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [ |
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent"> |
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| 5 | %general-entities; |
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| 6 | ]> |
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| 7 | |
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| 8 | <sect1 id="ch-cross-tools-glibc-headers" role="wrap"> |
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| 9 | <?dbhtml filename="glibc-headers.html"?> |
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| 10 | |
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| 11 | <title>Glibc-&glibc-version; Headers</title> |
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| 12 | |
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| 13 | <indexterm zone="ch-cross-tools-glibc-headers"> |
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| 14 | <primary sortas="a-Glibc">Glibc</primary> |
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| 15 | <secondary>cross tools, headers</secondary> |
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| 16 | </indexterm> |
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| 17 | |
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[cf66ceae] | 18 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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| 19 | href="../../final-system/common/glibc.xml" |
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| 20 | xpointer="xpointer(//*[@role='package'])"/> |
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[3f8be484] | 21 | |
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| 22 | <sect2 role="installation"> |
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| 23 | <title>Installation of Glibc Headers</title> |
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| 24 | |
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| 25 | <para os="s1">The following sed removes a dependency of gcc 3.4.x from |
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[6d4c909] | 26 | the glibc used in cross-lfs. The reason it is changed is |
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| 27 | because only the headers are being installed now; no compiling takes place. |
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| 28 | In the next glibc build, the gcc that's built right after this section will be used.</para> |
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[3f8be484] | 29 | |
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[f729ad2] | 30 | <screen os="s2"><userinput>cp -v configure{,.orig} |
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[3f8be484] | 31 | sed -e 's/3.4/3.[0-9]/g' configure.orig > configure</userinput></screen> |
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| 32 | |
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| 33 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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| 34 | href="../../final-system/common/glibc.xml" |
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| 35 | xpointer="xpointer(//*[@os='e'])"/> |
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| 36 | |
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| 37 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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| 38 | href="../../final-system/common/glibc.xml" |
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| 39 | xpointer="xpointer(//*[@os='f'])"/> |
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| 40 | |
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[c4d5e29] | 41 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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| 42 | href="../common/glibc.xml" |
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| 43 | xpointer="xpointer(//*[@os='dd'])"/> |
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| 44 | |
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| 45 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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| 46 | href="../common/glibc.xml" |
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| 47 | xpointer="xpointer(//*[@os='de'])"/> |
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| 48 | |
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[f0ed7ed] | 49 | <para os="df">Glibc has an issue cross-compiling the headers, where it can |
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| 50 | misdetect the capabilities of Binutils and decide they are inadequate. The |
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| 51 | following line fixes this:</para> |
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| 52 | |
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| 53 | <screen os="dg"><userinput>echo "libc_cv_initfini_array=yes" >> config.cache |
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| 54 | </userinput></screen> |
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| 55 | |
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[3f8be484] | 56 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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| 57 | href="../../final-system/common/glibc.xml" |
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| 58 | xpointer="xpointer(//*[@os='g'])"/> |
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| 59 | |
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[d3a4fc0] | 60 | <screen os="s3"><userinput>CC=gcc ../glibc-&glibc-version;/configure --prefix=/tools \ |
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[3f8be484] | 61 | --host=${LFS_TARGET} --build=${LFS_HOST} \ |
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| 62 | --disable-sanity-checks --enable-kernel=2.6.0 \ |
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[c4d5e29] | 63 | --with-headers=/tools/include --cache-file=config.cache \ |
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[3f8be484] | 64 | --with-binutils=/cross-tools/${LFS_TARGET}/bin</userinput></screen> |
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| 65 | |
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| 66 | <warning os="e1"> |
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[d3a4fc0] | 67 | <para><emphasis>Any</emphasis> error message you see about nptl at this point |
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[3f8be484] | 68 | can safely be ignored.</para> |
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| 69 | </warning> |
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| 70 | |
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| 71 | <variablelist os="ca"> |
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| 72 | <title>The meaning of the configure options:</title> |
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| 73 | |
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[d3a4fc0] | 74 | <varlistentry os="ca1"> |
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[3f8be484] | 75 | <term><parameter>CC=gcc</parameter></term> |
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| 76 | <listitem> |
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[6d4c909] | 77 | <para>Tells Glibc to use the host's GCC compiler.</para> |
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[3f8be484] | 78 | </listitem> |
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| 79 | </varlistentry> |
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| 80 | |
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[d3a4fc0] | 81 | <varlistentry os="ca2"> |
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[53de1f5] | 82 | <term><parameter>--build=${LFS_HOST}</parameter></term> |
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[3f8be484] | 83 | <listitem> |
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[253c621] | 84 | <para>When used with --host, this creates a cross-architecture |
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[d3a4fc0] | 85 | executable that creates files for ${LFS_TARGET} but runs on ${LFS_HOST).</para> |
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[3f8be484] | 86 | </listitem> |
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| 87 | </varlistentry> |
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| 88 | |
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[8659630] | 89 | <varlistentry os="ca3"> |
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[253c621] | 90 | <term><parameter>--host=${LFS_TARGET}</parameter></term> |
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[3f8be484] | 91 | <listitem> |
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[253c621] | 92 | <para>When used with --build, this creates a cross-architecture |
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[d3a4fc0] | 93 | executable that creates files for ${LFS_TARGET} but runs on ${LFS_HOST).</para> |
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[3f8be484] | 94 | </listitem> |
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| 95 | </varlistentry> |
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| 96 | |
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[8659630] | 97 | <varlistentry os="ca4"> |
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[3f8be484] | 98 | <term><parameter>--disable-sanity-checks</parameter></term> |
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| 99 | <listitem> |
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[d3a4fc0] | 100 | <para>This switch disables any checks that are in place.</para> |
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[3f8be484] | 101 | </listitem> |
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| 102 | </varlistentry> |
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| 103 | |
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[8659630] | 104 | <varlistentry os="ca5"> |
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[3f8be484] | 105 | <term><parameter>--enable-kernel=2.6.0</parameter></term> |
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| 106 | <listitem> |
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| 107 | <para>This tells Glibc to compile the library with support |
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| 108 | for 2.6.x Linux kernels.</para> |
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| 109 | </listitem> |
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| 110 | </varlistentry> |
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| 111 | |
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[8659630] | 112 | <varlistentry os="ca6"> |
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[3f8be484] | 113 | <term><parameter>--with-headers=/tools/include</parameter></term> |
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| 114 | <listitem> |
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| 115 | <para>This tells Glibc to compile itself against the headers |
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| 116 | recently installed to the <filename class="directory">/tools</filename> |
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| 117 | directory, so that it knows exactly what features the kernel has |
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| 118 | and can optimize itself accordingly.</para> |
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| 119 | </listitem> |
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| 120 | </varlistentry> |
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| 121 | |
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[8659630] | 122 | <varlistentry os="ca7"> |
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[3f8be484] | 123 | <term><parameter>--with-binutils=/cross-tools/${LFS_TARGET}/bin</parameter></term> |
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| 124 | <listitem> |
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[6d4c909] | 125 | <para>This tells Glibc to use the binutils for the specific target architecture.</para> |
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[3f8be484] | 126 | </listitem> |
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| 127 | </varlistentry> |
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| 128 | |
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| 129 | </variablelist> |
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| 130 | |
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| 131 | <para os="cb">Now, install the headers:</para> |
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| 132 | |
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| 133 | <screen os="cd"><userinput>make install-headers</userinput></screen> |
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| 134 | |
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[6d4c909] | 135 | <para os="ce">Some files aren't installed by the above command, so copy the additional header files that are needed:</para> |
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[3f8be484] | 136 | |
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[6d4c909] | 137 | <para os="cf">First copy a common file over to <filename |
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[3f8be484] | 138 | class="directory">/tools/include</filename>:</para> |
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| 139 | |
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[f729ad2] | 140 | <screen os="cg"><userinput>install -dv /tools/include/bits |
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[3f8be484] | 141 | cp bits/stdio_lim.h /tools/include/bits</userinput></screen> |
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| 142 | |
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[6d4c909] | 143 | <para os="ch">Now create a blank stub file:</para> |
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[3f8be484] | 144 | |
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| 145 | <screen os="ci"><userinput>touch /tools/include/gnu/stubs.h</userinput></screen> |
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| 146 | |
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[6d4c909] | 147 | <para os="cj">For NPTL use the following command:</para> |
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[3f8be484] | 148 | |
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[f729ad2] | 149 | <screen os="ck"><userinput>cp -v ../glibc-&glibc-version;/nptl/sysdeps/pthread/pthread.h /tools/include/</userinput></screen> |
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[3f8be484] | 150 | |
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[6d4c909] | 151 | <para os="cl">Now copy the architecture specific header over:</para> |
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[3f8be484] | 152 | |
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[f729ad2] | 153 | <screen os="cm"><userinput>cp -v ../glibc-&glibc-version;/nptl/sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h /tools/include/bits/</userinput></screen> |
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[3f8be484] | 154 | |
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| 155 | </sect2> |
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| 156 | |
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| 157 | <sect2 role="content"> |
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| 158 | <title/> |
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| 159 | |
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| 160 | <para>Details on this package are located in <xref |
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| 161 | linkend="contents-glibc" role="."/></para> |
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| 162 | |
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| 163 | </sect2> |
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| 164 | |
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| 165 | </sect1> |
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