[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[b06ca36] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[673b0d8] | 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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[1f7ca93] | 7 |
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[9652249] | 8 | <sect1 id="ch-tools-gcc-pass1" role="wrap">
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[1f7ca93] | 9 | <?dbhtml filename="gcc-pass1.html"?>
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| 10 |
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[e747759] | 11 | <sect1info condition="script">
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| 12 | <productname>gcc</productname>
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| 13 | <productnumber>&gcc-version;</productnumber>
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| 14 | <address>&gcc-url;</address>
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| 15 | </sect1info>
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| 16 |
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[1f7ca93] | 17 | <title>GCC-&gcc-version; - Pass 1</title>
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| 18 |
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| 19 | <indexterm zone="ch-tools-gcc-pass1">
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| 20 | <primary sortas="a-GCC">GCC</primary>
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| 21 | <secondary>tools, pass 1</secondary>
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| 22 | </indexterm>
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| 23 |
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| 24 | <sect2 role="package">
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| 25 | <title/>
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[bc82645e] | 26 |
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[1f7ca93] | 27 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
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| 28 | href="../chapter06/gcc.xml"
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| 29 | xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
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[81fd230] | 30 |
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[1f7ca93] | 31 | <segmentedlist>
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| 32 | <segtitle>&buildtime;</segtitle>
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| 33 | <segtitle>&diskspace;</segtitle>
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[5888299] | 34 |
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[1f7ca93] | 35 | <seglistitem>
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[e4a5635] | 36 | <seg>&gcc-ch5p1-sbu;</seg>
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| 37 | <seg>&gcc-ch5p1-du;</seg>
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[1f7ca93] | 38 | </seglistitem>
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| 39 | </segmentedlist>
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[673b0d8] | 40 |
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[1f7ca93] | 41 | </sect2>
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[73aedd1d] | 42 |
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[1f7ca93] | 43 | <sect2 role="installation">
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[4e82d47] | 44 | <title>Installation of Cross GCC</title>
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[73aedd1d] | 45 |
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[6cc0516] | 46 | <para>GCC now requires the GMP and MPFR packages. As these packages may
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| 47 | not be included in your host distribution, they will be built with
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| 48 | GCC.</para>
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| 49 |
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[7ce01e0] | 50 | <screen><userinput remap="pre">tar -jxf ../mpfr-&mpfr-version;.tar.bz2
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| 51 | mv mpfr-&mpfr-version; mpfr
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| 52 | tar -jxf ../gmp-&gmp-version;.tar.bz2
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[6cc0516] | 53 | mv gmp-&gmp-version; gmp</userinput></screen>
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| 54 |
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[1f7ca93] | 55 | <para>The GCC documentation recommends building GCC outside of the
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| 56 | source directory in a dedicated build directory:</para>
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[3d36131c] | 57 |
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[0445a3d] | 58 | <screen><userinput remap="pre">mkdir -v ../gcc-build
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[73aedd1d] | 59 | cd ../gcc-build</userinput></screen>
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| 60 |
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[1f7ca93] | 61 | <para>Prepare GCC for compilation:</para>
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[73aedd1d] | 62 |
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[4e82d47] | 63 | <screen><userinput remap="configure">../gcc-&gcc-version;/configure \
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| 64 | --target=$LFS_TGT --prefix=/tools \
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| 65 | --disable-nls --disable-shared --disable-multilib \
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| 66 | --disable-decimal-float --disable-threads \
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| 67 | --disable-libmudflap --disable-libssp \
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| 68 | --disable-libgomp --enable-languages=c</userinput></screen>
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[81fd230] | 69 |
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[1f7ca93] | 70 | <variablelist>
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| 71 | <title>The meaning of the configure options:</title>
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| 72 |
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| 73 | <varlistentry>
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[0eb90658] | 74 | <term><parameter>--disable-shared</parameter></term>
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[1f7ca93] | 75 | <listitem>
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[c49647b1] | 76 | <para>This switch forces GCC to link its internal libraries
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[0eb90658] | 77 | statically. We do this to avoid possible issues with the host
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| 78 | system.</para>
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[1f7ca93] | 79 | </listitem>
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| 80 | </varlistentry>
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| 81 |
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[182d5d3] | 82 | <varlistentry>
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[4e82d47] | 83 | <term><parameter>--disable-decimal-float, --disable-threads, --disable-libmudflap, --disable-libssp, --disable-libgomp</parameter></term>
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[182d5d3] | 84 | <listitem>
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[4e82d47] | 85 | <para>These switches disable support for the decimal floating point extension,
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| 86 | threading, libmudflap, libssp and libgomp respectively. These features will fail
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| 87 | to compile when building a cross-compiler and are not necessary for the task of
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| 88 | cross-compiling the temporary libc.</para>
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[182d5d3] | 89 | </listitem>
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| 90 | </varlistentry>
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| 91 |
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[1f7ca93] | 92 | <varlistentry>
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[4e82d47] | 93 | <term><parameter>--disable-multilib</parameter></term>
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[1f7ca93] | 94 | <listitem>
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[4e82d47] | 95 | <para>On x86_64, LFS does not yet support a multilib configuration.
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| 96 | This switch is harmless for x86.</para>
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[1f7ca93] | 97 | </listitem>
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| 98 | </varlistentry>
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| 99 |
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[6e88633] | 100 | <varlistentry>
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[4e82d47] | 101 | <term><parameter>--enable-languages=c</parameter></term>
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[6e88633] | 102 | <listitem>
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[4e82d47] | 103 | <para>This option ensures that only the C compiler is built.
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| 104 | This is the only language needed now.</para>
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[6e88633] | 105 | </listitem>
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| 106 | </varlistentry>
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| 107 |
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[1f7ca93] | 108 | </variablelist>
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| 109 |
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[4e82d47] | 110 | <para>Compile GCC by running:</para>
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[b0a4c9a] | 111 |
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[0445a3d] | 112 | <screen><userinput remap="make">make</userinput></screen>
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[81fd230] | 113 |
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[1f7ca93] | 114 | <para>Compilation is now complete. At this point, the test suite would
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| 115 | normally be run, but, as mentioned before, the test suite framework is
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| 116 | not in place yet. The benefits of running the tests at this point
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| 117 | are minimal since the programs from this first pass will soon be
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| 118 | replaced.</para>
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| 119 |
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| 120 | <para>Install the package:</para>
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[73aedd1d] | 121 |
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[0445a3d] | 122 | <screen><userinput remap="install">make install</userinput></screen>
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[73aedd1d] | 123 |
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[0eb90658] | 124 | <para>Using <parameter>--disable-shared</parameter> means that the
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| 125 | <filename>libgcc_eh.a</filename> file isn't created and installed. The
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| 126 | Glibc package depends on this library as it uses
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[4e82d47] | 127 | <parameter>-lgcc_eh</parameter> within its build system. This dependency
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| 128 | can be satisfied by creating a symlink to <filename>libgcc.a</filename>,
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[0eb90658] | 129 | since that file will end up containing the objects normally contained in
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| 130 | <filename>libgcc_eh.a</filename>.</para>
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| 131 |
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[4e82d47] | 132 | <screen><userinput remap="install">ln -vs libgcc.a `$LFS_TGT-gcc -print-libgcc-file-name | \
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[0eb90658] | 133 | sed 's/libgcc/&_eh/'`</userinput></screen>
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| 134 |
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[1f7ca93] | 135 | </sect2>
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[bc82645e] | 136 |
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[1f7ca93] | 137 | <sect2 role="content">
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| 138 | <title/>
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[81fd230] | 139 |
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[1f7ca93] | 140 | <para>Details on this package are located in
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| 141 | <xref linkend="contents-gcc" role="."/></para>
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[81fd230] | 142 |
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[1f7ca93] | 143 | </sect2>
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| 144 |
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| 145 | </sect1>
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