[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
|
---|
[1770019] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
|
---|
[673b0d8] | 3 | <!ENTITY % general-entities SYSTEM "../general.ent">
|
---|
[3e36a78] | 4 | <!ENTITY % patches-entities SYSTEM "../patches.ent">
|
---|
[673b0d8] | 5 | %general-entities;
|
---|
[3e36a78] | 6 | %patches-entities;
|
---|
[673b0d8] | 7 | ]>
|
---|
[9652249] | 8 | <sect1 id="ch-tools-gcc-pass1" role="wrap">
|
---|
[673b0d8] | 9 | <title>GCC-&gcc-version; - Pass 1</title>
|
---|
| 10 | <?dbhtml filename="gcc-pass1.html"?>
|
---|
[bc82645e] | 11 |
|
---|
[81fd230] | 12 | <indexterm zone="ch-tools-gcc-pass1">
|
---|
| 13 | <primary sortas="a-GCC">GCC</primary>
|
---|
| 14 | <secondary>tools, pass 1</secondary></indexterm>
|
---|
| 15 |
|
---|
[9652249] | 16 | <sect2 role="package"><title/>
|
---|
[81fd230] | 17 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="../chapter06/gcc.xml" xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
|
---|
[5888299] | 18 |
|
---|
[9652249] | 19 | <segmentedlist>
|
---|
| 20 | <segtitle>&buildtime;</segtitle>
|
---|
| 21 | <segtitle>&diskspace;</segtitle>
|
---|
[fad7667] | 22 | <seglistitem><seg>4.4 SBU</seg><seg>219 MB</seg></seglistitem>
|
---|
[9652249] | 23 | </segmentedlist>
|
---|
[673b0d8] | 24 |
|
---|
[81fd230] | 25 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="../chapter06/gcc.xml" xpointer="xpointer(/sect1/sect2[1]/segmentedlist[2])"/>
|
---|
| 26 |
|
---|
[9652249] | 27 | </sect2>
|
---|
[73aedd1d] | 28 |
|
---|
[9652249] | 29 | <sect2 role="installation">
|
---|
[73aedd1d] | 30 | <title>Installation of GCC</title>
|
---|
| 31 |
|
---|
[81fd230] | 32 | <para>This package is known to have issues when its default
|
---|
| 33 | optimization flags (including the <parameter>-march</parameter> and
|
---|
| 34 | <parameter>-mcpu</parameter> options) are changed. If any environment
|
---|
| 35 | variables that override default optimizations have been defined, such
|
---|
| 36 | as <envar>CFLAGS</envar> and <envar>CXXFLAGS</envar>,
|
---|
| 37 | unset them when building GCC.</para>
|
---|
| 38 |
|
---|
| 39 | <para>The GCC documentation recommends building GCC outside of the
|
---|
| 40 | source directory in a dedicated build directory:</para>
|
---|
[3d36131c] | 41 |
|
---|
[5998892] | 42 | <screen><userinput>mkdir -v ../gcc-build
|
---|
[73aedd1d] | 43 | cd ../gcc-build</userinput></screen>
|
---|
| 44 |
|
---|
[d27a27b] | 45 | <para>Prepare GCC for compilation:</para>
|
---|
[73aedd1d] | 46 |
|
---|
[81fd230] | 47 | <screen><userinput>../gcc-&gcc-version;/configure --prefix=/tools \
|
---|
| 48 | --libexecdir=/tools/lib --with-local-prefix=/tools \
|
---|
| 49 | --disable-nls --enable-shared --enable-languages=c</userinput></screen>
|
---|
| 50 |
|
---|
| 51 | <para>The meaning of the configure options:</para>
|
---|
| 52 |
|
---|
| 53 | <variablelist>
|
---|
| 54 | <varlistentry>
|
---|
| 55 | <term><parameter>--with-local-prefix=/tools</parameter></term>
|
---|
| 56 | <listitem><para>The purpose of this switch is to remove <filename class="directory">/usr/local/include</filename>
|
---|
| 57 | from <command>gcc</command>'s include search path. This is not absolutely
|
---|
| 58 | essential, however, it helps to minimize the influence of the host
|
---|
| 59 | system.</para>
|
---|
| 60 | </listitem>
|
---|
| 61 | </varlistentry>
|
---|
| 62 |
|
---|
| 63 | <varlistentry>
|
---|
| 64 | <term><parameter>--enable-shared</parameter></term>
|
---|
[516b668] | 65 | <listitem><para>This switch allows the building of
|
---|
[81fd230] | 66 | <filename class="libraryfile">libgcc_s.so.1</filename> and
|
---|
[516b668] | 67 | <filename class="libraryfile">libgcc_eh.a</filename>. Having
|
---|
| 68 | <filename class="libraryfile">libgcc_eh.a</filename> available ensures that the
|
---|
| 69 | configure script for Glibc (the next package we compile) produces the proper
|
---|
| 70 | results.</para></listitem>
|
---|
[81fd230] | 71 | </varlistentry>
|
---|
| 72 |
|
---|
| 73 | <varlistentry>
|
---|
| 74 | <term><parameter>--enable-languages=c</parameter></term>
|
---|
| 75 | <listitem><para>This option ensures that only the C compiler is built.
|
---|
[dc0e915] | 76 | </para></listitem>
|
---|
[81fd230] | 77 | </varlistentry>
|
---|
| 78 | </variablelist>
|
---|
[73aedd1d] | 79 |
|
---|
| 80 | <para>Continue with compiling the package:</para>
|
---|
| 81 |
|
---|
[516b668] | 82 | <screen><userinput>make bootstrap</userinput></screen>
|
---|
[73aedd1d] | 83 |
|
---|
[81fd230] | 84 | <para>The meaning of the make parameters:</para>
|
---|
| 85 |
|
---|
| 86 | <variablelist>
|
---|
| 87 | <varlistentry>
|
---|
| 88 | <term><parameter>bootstrap</parameter></term>
|
---|
| 89 | <listitem><para>This target does not just compile GCC, but compiles it
|
---|
| 90 | several times. It uses the programs compiled in a first round to
|
---|
| 91 | compile itself a second time, and then again a third time. It then
|
---|
| 92 | compares these second and third compiles to make sure it can reproduce
|
---|
| 93 | itself flawlessly. This also implies that it was compiled
|
---|
| 94 | correctly.</para></listitem>
|
---|
| 95 | </varlistentry>
|
---|
| 96 | </variablelist>
|
---|
| 97 |
|
---|
| 98 | <para>Compilation is now complete. At this point, the test suite would
|
---|
| 99 | normally be run, but, as mentioned before, the test suite framework is
|
---|
| 100 | not in place yet. The benefits of running the tests at this point
|
---|
| 101 | are minimal since the programs from this first pass will soon be
|
---|
| 102 | replaced.</para>
|
---|
| 103 |
|
---|
| 104 | <para>Install the package:</para>
|
---|
[73aedd1d] | 105 |
|
---|
| 106 | <screen><userinput>make install</userinput></screen>
|
---|
| 107 |
|
---|
[81fd230] | 108 | <para>As a finishing touch, create a symlink. Many programs and
|
---|
| 109 | scripts run <command>cc</command> instead of <command>gcc</command>, which is used to keep programs generic
|
---|
| 110 | and therefore usable on all kinds of UNIX systems where the GNU C compiler
|
---|
| 111 | is not always installed. Running <command>cc</command> leaves the system administrator
|
---|
| 112 | free to decide which C compiler to install.</para>
|
---|
[3d36131c] | 113 |
|
---|
[5998892] | 114 | <screen><userinput>ln -vs gcc /tools/bin/cc</userinput></screen>
|
---|
[73aedd1d] | 115 |
|
---|
| 116 | </sect2>
|
---|
[bc82645e] | 117 |
|
---|
[81fd230] | 118 | <sect2 role="content"><title/>
|
---|
| 119 | <para>Details on this package are located in <xref
|
---|
| 120 | linkend="contents-gcc" role="."/></para>
|
---|
| 121 | </sect2>
|
---|
| 122 |
|
---|
[bc82645e] | 123 | </sect1>
|
---|
[81fd230] | 124 |
|
---|