1 | <?xml version="1.0" encoding="ISO-8859-1"?>
|
---|
2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
---|
3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
|
---|
4 | <!ENTITY % general-entities SYSTEM "../general.ent">
|
---|
5 | %general-entities;
|
---|
6 | ]>
|
---|
7 |
|
---|
8 | <sect1 id="ch-tools-gcc-pass1" role="wrap">
|
---|
9 | <?dbhtml filename="gcc-pass1.html"?>
|
---|
10 |
|
---|
11 | <sect1info condition="script">
|
---|
12 | <productname>gcc</productname>
|
---|
13 | <productnumber>&gcc-version;</productnumber>
|
---|
14 | <address>&gcc-url;</address>
|
---|
15 | </sect1info>
|
---|
16 |
|
---|
17 | <title>GCC-&gcc-version; - Pass 1</title>
|
---|
18 |
|
---|
19 | <indexterm zone="ch-tools-gcc-pass1">
|
---|
20 | <primary sortas="a-GCC">GCC</primary>
|
---|
21 | <secondary>tools, pass 1</secondary>
|
---|
22 | </indexterm>
|
---|
23 |
|
---|
24 | <sect2 role="package">
|
---|
25 | <title/>
|
---|
26 |
|
---|
27 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
|
---|
28 | href="../chapter06/gcc.xml"
|
---|
29 | xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
|
---|
30 |
|
---|
31 | <segmentedlist>
|
---|
32 | <segtitle>&buildtime;</segtitle>
|
---|
33 | <segtitle>&diskspace;</segtitle>
|
---|
34 |
|
---|
35 | <seglistitem>
|
---|
36 | <seg>&gcc-ch5p1-sbu;</seg>
|
---|
37 | <seg>&gcc-ch5p1-du;</seg>
|
---|
38 | </seglistitem>
|
---|
39 | </segmentedlist>
|
---|
40 |
|
---|
41 | </sect2>
|
---|
42 |
|
---|
43 | <sect2 role="installation">
|
---|
44 | <title>Installation of Cross GCC</title>
|
---|
45 |
|
---|
46 | <para>GCC now requires the GMP, MPFR and MPC packages. As these packages may
|
---|
47 | not be included in your host distribution, they will be built with
|
---|
48 | GCC. Unpack each package into the GCC source directory and rename the
|
---|
49 | resulting directories so the GCC build procedures will automatically
|
---|
50 | use them:</para>
|
---|
51 |
|
---|
52 | <screen><userinput remap="pre">tar -jxf ../mpfr-&mpfr-version;.tar.bz2
|
---|
53 | mv -v mpfr-&mpfr-version; mpfr
|
---|
54 | tar -jxf ../gmp-&gmp-version;.tar.bz2
|
---|
55 | mv -v gmp-&gmp-version; gmp
|
---|
56 | tar -zxf ../mpc-&mpc-version;.tar.gz
|
---|
57 | mv -v mpc-&mpc-version; mpc</userinput></screen>
|
---|
58 |
|
---|
59 | <para>Apply a patch that will allow the building of the libiberty and zlib
|
---|
60 | target libraries to be disabled as these do not build correctly in a
|
---|
61 | cross-compiled environment:</para>
|
---|
62 |
|
---|
63 | <screen><userinput remap="pre">patch -Np1 -i ../&gcc-crosscompile-patch;</userinput></screen>
|
---|
64 |
|
---|
65 | <para>The GCC documentation recommends building GCC outside of the
|
---|
66 | source directory in a dedicated build directory:</para>
|
---|
67 |
|
---|
68 | <screen><userinput remap="pre">mkdir -v ../gcc-build
|
---|
69 | cd ../gcc-build</userinput></screen>
|
---|
70 |
|
---|
71 | <para>Prepare GCC for compilation:</para>
|
---|
72 |
|
---|
73 | <screen><userinput remap="configure">../gcc-&gcc-version;/configure \
|
---|
74 | --target=$LFS_TGT --prefix=/tools \
|
---|
75 | --disable-nls --disable-shared --disable-multilib \
|
---|
76 | --disable-decimal-float --disable-threads \
|
---|
77 | --disable-libmudflap --disable-libssp \
|
---|
78 | --disable-libgomp --disable-libquadmath \
|
---|
79 | --disable-target-libiberty --disable-target-zlib \
|
---|
80 | --enable-languages=c --without-ppl --without-cloog</userinput></screen>
|
---|
81 |
|
---|
82 | <variablelist>
|
---|
83 | <title>The meaning of the configure options:</title>
|
---|
84 |
|
---|
85 | <varlistentry>
|
---|
86 | <term><parameter>--disable-shared</parameter></term>
|
---|
87 | <listitem>
|
---|
88 | <para>This switch forces GCC to link its internal libraries
|
---|
89 | statically. We do this to avoid possible issues with the host
|
---|
90 | system.</para>
|
---|
91 | </listitem>
|
---|
92 | </varlistentry>
|
---|
93 |
|
---|
94 | <varlistentry>
|
---|
95 | <term><parameter>--disable-decimal-float, --disable-threads, --disable-libmudflap, --disable-libssp, --disable-libgomp, --disable-libquadmath --disable-target-libiberty --disable-target-zlib</parameter></term>
|
---|
96 | <listitem>
|
---|
97 | <para>These switches disable support for the decimal floating point
|
---|
98 | extension, threading, libmudflap, libssp and libgomp, libquadmath,
|
---|
99 | libiberty and zlib respectively. These features will fail to compile
|
---|
100 | when building a cross-compiler and are not necessary for the task of
|
---|
101 | cross-compiling the temporary libc.</para>
|
---|
102 | </listitem>
|
---|
103 | </varlistentry>
|
---|
104 |
|
---|
105 | <varlistentry>
|
---|
106 | <term><parameter>--disable-multilib</parameter></term>
|
---|
107 | <listitem>
|
---|
108 | <para>On x86_64, LFS does not yet support a multilib configuration.
|
---|
109 | This switch is harmless for x86.</para>
|
---|
110 | </listitem>
|
---|
111 | </varlistentry>
|
---|
112 |
|
---|
113 | <varlistentry>
|
---|
114 | <term><parameter>--enable-languages=c</parameter></term>
|
---|
115 | <listitem>
|
---|
116 | <para>This option ensures that only the C compiler is built.
|
---|
117 | This is the only language needed now.</para>
|
---|
118 | </listitem>
|
---|
119 | </varlistentry>
|
---|
120 |
|
---|
121 | <varlistentry>
|
---|
122 | <term><parameter>--without-ppl, --without-cloog</parameter></term>
|
---|
123 | <listitem>
|
---|
124 | <para>These switches prevent GCC from building against the PPL and
|
---|
125 | CLooG libraries which may be present on the host system, but will not
|
---|
126 | be available in the chroot environment.</para>
|
---|
127 | </listitem>
|
---|
128 | </varlistentry>
|
---|
129 |
|
---|
130 | </variablelist>
|
---|
131 |
|
---|
132 | <para>Compile GCC by running:</para>
|
---|
133 |
|
---|
134 | <screen><userinput remap="make">make</userinput></screen>
|
---|
135 |
|
---|
136 | <para>Compilation is now complete. At this point, the test suite would
|
---|
137 | normally be run, but, as mentioned before, the test suite framework is
|
---|
138 | not in place yet. The benefits of running the tests at this point
|
---|
139 | are minimal since the programs from this first pass will soon be
|
---|
140 | replaced.</para>
|
---|
141 |
|
---|
142 | <para>Install the package:</para>
|
---|
143 |
|
---|
144 | <screen><userinput remap="install">make install</userinput></screen>
|
---|
145 |
|
---|
146 | <para>Using <parameter>--disable-shared</parameter> means that the
|
---|
147 | <filename>libgcc_eh.a</filename> file isn't created and installed. The
|
---|
148 | Glibc package depends on this library as it uses
|
---|
149 | <parameter>-lgcc_eh</parameter> within its build system. This dependency
|
---|
150 | can be satisfied by creating a symlink to <filename>libgcc.a</filename>,
|
---|
151 | since that file will end up containing the objects normally contained in
|
---|
152 | <filename>libgcc_eh.a</filename>:</para>
|
---|
153 |
|
---|
154 | <screen><userinput remap="install">ln -vs libgcc.a `$LFS_TGT-gcc -print-libgcc-file-name | \
|
---|
155 | sed 's/libgcc/&_eh/'`</userinput></screen>
|
---|
156 |
|
---|
157 | </sect2>
|
---|
158 |
|
---|
159 | <sect2 role="content">
|
---|
160 | <title/>
|
---|
161 |
|
---|
162 | <para>Details on this package are located in
|
---|
163 | <xref linkend="contents-gcc" role="."/></para>
|
---|
164 |
|
---|
165 | </sect2>
|
---|
166 |
|
---|
167 | </sect1>
|
---|