[519ee45] | 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-tools-gcc-pass1" role="wrap">
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| 9 | <?dbhtml filename="gcc-pass1.html"?>
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| 10 |
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| 11 | <title>GCC-&gcc-version; - Pass 1</title>
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| 12 |
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| 13 | <indexterm zone="ch-tools-gcc-pass1">
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| 14 | <primary sortas="a-GCC">GCC</primary>
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| 15 | <secondary>tools, pass 1</secondary>
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| 16 | </indexterm>
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| 17 |
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| 18 | <sect2 role="package">
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| 19 | <title/>
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| 20 |
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| 21 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
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| 22 | href="../chapter06/gcc.xml"
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| 23 | xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
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| 24 |
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| 25 | <segmentedlist>
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| 26 | <segtitle>&buildtime;</segtitle>
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| 27 | <segtitle>&diskspace;</segtitle>
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| 28 |
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| 29 | <seglistitem>
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| 30 | <seg>&gcc-ch5p1-sbu;</seg>
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| 31 | <seg>&gcc-ch5p1-du;</seg>
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| 32 | </seglistitem>
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| 33 | </segmentedlist>
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| 34 |
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| 35 | </sect2>
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| 36 |
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| 37 | <sect2 role="installation">
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| 38 | <title>Installation of GCC</title>
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| 39 |
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| 40 | <para>The GCC documentation recommends building GCC outside of the
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| 41 | source directory in a dedicated build directory:</para>
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| 42 |
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| 43 | <screen><userinput>mkdir -v ../gcc-build
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| 44 | cd ../gcc-build</userinput></screen>
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| 45 |
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| 46 | <para>Prepare GCC for compilation:</para>
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| 47 |
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| 48 | <screen><userinput>../gcc-&gcc-version;/configure --prefix=/tools \
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| 49 | --with-local-prefix=/tools --disable-nls --enable-shared \
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| 50 | --enable-languages=c</userinput></screen>
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| 51 |
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| 52 | <variablelist>
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| 53 | <title>The meaning of the configure options:</title>
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| 54 |
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| 55 | <varlistentry>
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| 56 | <term><parameter>--with-local-prefix=/tools</parameter></term>
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| 57 | <listitem>
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| 58 | <para>The purpose of this switch is to remove <filename
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| 59 | class="directory">/usr/local/include</filename> from
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| 60 | <command>gcc</command>'s include search path. This is not
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| 61 | absolutely essential, however, it helps to minimize the
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| 62 | influence of the host system.</para>
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| 63 | </listitem>
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| 64 | </varlistentry>
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| 65 |
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| 66 | <varlistentry>
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| 67 | <term><parameter>--enable-shared</parameter></term>
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| 68 | <listitem>
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| 69 | <para>This switch allows the building of <filename
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| 70 | class="libraryfile">libgcc_s.so.1</filename> and
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| 71 | <filename class="libraryfile">libgcc_eh.a</filename>.
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| 72 | Having <filename class="libraryfile">libgcc_eh.a</filename>
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| 73 | available ensures that the configure script for Glibc (the
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| 74 | next package we compile) produces the proper results.</para>
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| 75 | </listitem>
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| 76 | </varlistentry>
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| 77 |
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| 78 | <varlistentry>
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| 79 | <term><parameter>--enable-languages=c</parameter></term>
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| 80 | <listitem>
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| 81 | <para>This option ensures that only the C compiler is built.</para>
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| 82 | </listitem>
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| 83 | </varlistentry>
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| 84 |
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| 85 | </variablelist>
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| 86 |
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| 87 | <para>Continue with compiling the package:</para>
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| 88 |
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| 89 | <screen><userinput>make bootstrap</userinput></screen>
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| 90 |
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| 91 | <variablelist>
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| 92 | <title>The meaning of the make parameter:</title>
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| 93 |
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| 94 | <varlistentry>
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| 95 | <term><parameter>bootstrap</parameter></term>
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| 96 | <listitem>
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| 97 | <para>This target does not just compile GCC, but compiles it
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| 98 | several times. It uses the programs compiled in a first round
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| 99 | to compile itself a second time, and then again a third time.
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| 100 | It then compares these second and third compiles to make sure
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| 101 | it can reproduce itself flawlessly. This also implies that it
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| 102 | was compiled correctly.</para>
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| 103 | </listitem>
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| 104 | </varlistentry>
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| 105 |
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| 106 | </variablelist>
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| 107 |
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| 108 | <para>Compilation is now complete. At this point, the test suite would
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| 109 | normally be run, but, as mentioned before, the test suite framework is
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| 110 | not in place yet. The benefits of running the tests at this point
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| 111 | are minimal since the programs from this first pass will soon be
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| 112 | replaced.</para>
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| 113 |
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| 114 | <para>Install the package:</para>
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| 115 |
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| 116 | <screen><userinput>make install</userinput></screen>
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| 117 |
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| 118 | <para>As a finishing touch, create a symlink. Many programs and scripts
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| 119 | run <command>cc</command> instead of <command>gcc</command>, which is
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| 120 | used to keep programs generic and therefore usable on all kinds of UNIX
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| 121 | systems where the GNU C compiler is not always installed. Running
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| 122 | <command>cc</command> leaves the system administrator free to decide
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| 123 | which C compiler to install.</para>
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| 124 |
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| 125 | <screen><userinput>ln -vs gcc /tools/bin/cc</userinput></screen>
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| 126 |
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| 127 | </sect2>
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| 128 |
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| 129 | <sect2 role="content">
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| 130 | <title/>
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| 131 |
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| 132 | <para>Details on this package are located in
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| 133 | <xref linkend="contents-gcc" role="."/></para>
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| 134 |
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| 135 | </sect2>
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| 136 |
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| 137 | </sect1>
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