[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[1f7ca93] | 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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[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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| 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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[bc82645e] | 20 |
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[1f7ca93] | 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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[81fd230] | 24 |
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[1f7ca93] | 25 | <segmentedlist>
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| 26 | <segtitle>&buildtime;</segtitle>
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| 27 | <segtitle>&diskspace;</segtitle>
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[5888299] | 28 |
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[1f7ca93] | 29 | <seglistitem>
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| 30 | <seg>4.4 SBU</seg>
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| 31 | <seg>219 MB</seg>
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| 32 | </seglistitem>
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| 33 | </segmentedlist>
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[673b0d8] | 34 |
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[1f7ca93] | 35 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
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| 36 | href="../chapter06/gcc.xml"
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| 37 | xpointer="xpointer(/sect1/sect2[1]/segmentedlist[2])"/>
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[81fd230] | 38 |
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[1f7ca93] | 39 | </sect2>
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[73aedd1d] | 40 |
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[1f7ca93] | 41 | <sect2 role="installation">
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| 42 | <title>Installation of GCC</title>
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[73aedd1d] | 43 |
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[1f7ca93] | 44 | <para>The GCC documentation recommends building GCC outside of the
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| 45 | source directory in a dedicated build directory:</para>
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[3d36131c] | 46 |
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[5998892] | 47 | <screen><userinput>mkdir -v ../gcc-build
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[73aedd1d] | 48 | cd ../gcc-build</userinput></screen>
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| 49 |
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[1f7ca93] | 50 | <para>Prepare GCC for compilation:</para>
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[73aedd1d] | 51 |
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[81fd230] | 52 | <screen><userinput>../gcc-&gcc-version;/configure --prefix=/tools \
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[f684ec6c] | 53 | --with-local-prefix=/tools --disable-nls --enable-shared \
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| 54 | --enable-languages=c</userinput></screen>
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[81fd230] | 55 |
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[1f7ca93] | 56 | <variablelist>
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| 57 | <title>The meaning of the configure options:</title>
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| 58 |
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| 59 | <varlistentry>
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| 60 | <term><parameter>--with-local-prefix=/tools</parameter></term>
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| 61 | <listitem>
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| 62 | <para>The purpose of this switch is to remove <filename
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| 63 | class="directory">/usr/local/include</filename> from
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| 64 | <command>gcc</command>'s include search path. This is not
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| 65 | absolutely essential, however, it helps to minimize the
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| 66 | influence of the host system.</para>
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| 67 | </listitem>
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| 68 | </varlistentry>
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| 69 |
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| 70 | <varlistentry>
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| 71 | <term><parameter>--enable-shared</parameter></term>
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| 72 | <listitem>
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| 73 | <para>This switch allows the building of <filename
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| 74 | class="libraryfile">libgcc_s.so.1</filename> and
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| 75 | <filename class="libraryfile">libgcc_eh.a</filename>.
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| 76 | Having <filename class="libraryfile">libgcc_eh.a</filename>
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| 77 | available ensures that the configure script for Glibc (the
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| 78 | next package we compile) produces the proper results.</para>
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| 79 | </listitem>
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| 80 | </varlistentry>
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| 81 |
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| 82 | <varlistentry>
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| 83 | <term><parameter>--enable-languages=c</parameter></term>
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| 84 | <listitem>
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| 85 | <para>This option ensures that only the C compiler is built.</para>
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| 86 | </listitem>
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| 87 | </varlistentry>
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| 88 |
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| 89 | </variablelist>
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| 90 |
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| 91 | <para>Continue with compiling the package:</para>
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[73aedd1d] | 92 |
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[516b668] | 93 | <screen><userinput>make bootstrap</userinput></screen>
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[73aedd1d] | 94 |
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[1f7ca93] | 95 | <variablelist>
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[9e26f63] | 96 | <title>The meaning of the make parameter:</title>
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[81fd230] | 97 |
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[1f7ca93] | 98 | <varlistentry>
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| 99 | <term><parameter>bootstrap</parameter></term>
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| 100 | <listitem>
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| 101 | <para>This target does not just compile GCC, but compiles it
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| 102 | several times. It uses the programs compiled in a first round
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| 103 | to compile itself a second time, and then again a third time.
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| 104 | It then compares these second and third compiles to make sure
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| 105 | it can reproduce itself flawlessly. This also implies that it
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| 106 | was compiled correctly.</para>
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| 107 | </listitem>
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| 108 | </varlistentry>
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[81fd230] | 109 |
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[1f7ca93] | 110 | </variablelist>
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[81fd230] | 111 |
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[1f7ca93] | 112 | <para>Compilation is now complete. At this point, the test suite would
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| 113 | normally be run, but, as mentioned before, the test suite framework is
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| 114 | not in place yet. The benefits of running the tests at this point
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| 115 | are minimal since the programs from this first pass will soon be
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| 116 | replaced.</para>
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| 117 |
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| 118 | <para>Install the package:</para>
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[73aedd1d] | 119 |
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| 120 | <screen><userinput>make install</userinput></screen>
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| 121 |
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[1f7ca93] | 122 | <para>As a finishing touch, create a symlink. Many programs and scripts
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| 123 | run <command>cc</command> instead of <command>gcc</command>, which is
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| 124 | used to keep programs generic and therefore usable on all kinds of UNIX
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| 125 | systems where the GNU C compiler is not always installed. Running
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| 126 | <command>cc</command> leaves the system administrator free to decide
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| 127 | which C compiler to install.</para>
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[3d36131c] | 128 |
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[5998892] | 129 | <screen><userinput>ln -vs gcc /tools/bin/cc</userinput></screen>
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[73aedd1d] | 130 |
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[1f7ca93] | 131 | </sect2>
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[bc82645e] | 132 |
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[1f7ca93] | 133 | <sect2 role="content">
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| 134 | <title/>
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[81fd230] | 135 |
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[1f7ca93] | 136 | <para>Details on this package are located in
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| 137 | <xref linkend="contents-gcc" role="."/></para>
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[81fd230] | 138 |
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[1f7ca93] | 139 | </sect2>
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| 140 |
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| 141 | </sect1>
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