source: chapter07/libstdc++-pass2.xml@ d7e0db5

ml-11.0 multilib
Last change on this file since d7e0db5 was d7e0db5, checked in by Xℹ Ruoyao <xry111@…>, 16 months ago

Merge changes from trunk to multilib

git-svn-id: http://svn.linuxfromscratch.org/LFS/branches/multilib@12034 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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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-libstdcpp-pass2" role="wrap">
9 <?dbhtml filename="gcc-libstdc++-pass2.html"?>
10
11 <sect1info condition="script">
12 <productname>gcc-libstdc++</productname>
13 <productnumber>&gcc-version;</productnumber>
14 <address>&gcc-url;</address>
15 </sect1info>
16
17 <title>Libstdc++ from GCC-&gcc-version;, Pass 2</title>
18
19 <indexterm zone="ch-tools-libstdcpp-pass2">
20 <primary sortas="a-GCC">GCC</primary>
21 <secondary>tools, libstdc++ pass 2</secondary>
22 </indexterm>
23
24 <sect2 role="package">
25 <title/>
26
27 <para>When building <xref linkend="ch-tools-gcc-pass2"/> we had to defer
28 the installation of the C++ standard library because no suitable compiler
29 was available to compile it. We could not use the compiler built in that
30 section because it is a native compiler and should not be used outside of
31 chroot and risks polluting the libraries with some host components.</para>
32
33 <segmentedlist>
34 <segtitle>&buildtime;</segtitle>
35 <segtitle>&diskspace;</segtitle>
36
37 <seglistitem>
38 <seg>&libstdcpp-tmpp2-sbu;</seg>
39 <seg>&libstdcpp-tmpp2-du;</seg>
40 </seglistitem>
41 </segmentedlist>
42
43 </sect2>
44
45 <sect2 role="installation">
46 <title>Installation of Target Libstdc++</title>
47
48 <note>
49 <para><application>Libstdc++</application> is part of the GCC sources.
50 You should first unpack the GCC tarball and change to the
51 <filename>gcc-&gcc-version;</filename> directory.</para>
52 </note>
53
54 <para>Create a link which exists when building libstdc++ in the gcc tree:</para>
55
56<screen><userinput remap="pre">ln -s gthr-posix.h libgcc/gthr-default.h</userinput></screen>
57
58 <para>Create a separate build directory for libstdc++ and enter it:</para>
59
60<screen><userinput remap="pre">mkdir -v build
61cd build</userinput></screen>
62
63 <para>Prepare libstdc++ for compilation:</para>
64
65<screen arch="default"><userinput remap="configure">../libstdc++-v3/configure \
66 CXXFLAGS="-g -O2 -D_GNU_SOURCE" \
67 --prefix=/usr \
68 --disable-multilib \
69 --disable-nls \
70 --host=$(uname -m)-lfs-linux-gnu \
71 --disable-libstdcxx-pch</userinput></screen>
72<screen arch="ml_32,ml_x32,ml_all"><userinput remap="configure">../libstdc++-v3/configure \
73 CXXFLAGS="-g -O2 -D_GNU_SOURCE" \
74 --prefix=/usr \
75 --enable-multilib \
76 --disable-nls \
77 --host=$(uname -m)-lfs-linux-gnu \
78 --disable-libstdcxx-pch</userinput></screen>
79
80 <variablelist>
81 <title>The meaning of the configure options:</title>
82
83 <varlistentry>
84 <term><parameter>CXXFLAGS="-g -O2 -D_GNU_SOURCE"</parameter></term>
85 <listitem>
86 <para>These flags are passed by the top level Makefile when doing
87 a full build of GCC.</para>
88 </listitem>
89 </varlistentry>
90
91 <varlistentry>
92 <term><parameter>--host=$(uname -m)-lfs-linux-gnu</parameter></term>
93 <listitem>
94 <para>We have to mimic what would happen if this package were built
95 as part of a full compiler build. This switch would be passed to
96 configure by GCC's build machinery.</para>
97 </listitem>
98 </varlistentry>
99
100 <varlistentry>
101 <term><parameter>--disable-libstdcxx-pch</parameter></term>
102 <listitem>
103 <para>This switch prevents the installation of precompiled
104 include files, which are not needed at this stage.</para>
105 </listitem>
106 </varlistentry>
107
108 <varlistentry arch="ml_32,ml_x32,ml_all">
109 <term><parameter>--enable-multilib</parameter></term>
110 <listitem>
111 <para>This switch is set by default but it is added here
112 explicitly for documentary purpose. The libstdc++ libraries
113 will be built for every arch (m64, m32, mx32) which are
114 made available in <xref linkend="ch-tools-gcc-pass1"/>.</para>
115 </listitem>
116 </varlistentry>
117
118 </variablelist>
119
120 <para>Compile libstdc++ by running:</para>
121
122<screen><userinput remap="make">make</userinput></screen>
123
124 <para>Install the library:</para>
125
126<screen><userinput remap="install">make install</userinput></screen>
127
128 </sect2>
129
130 <sect2 role="content">
131 <title/>
132
133 <para>Details on this package are located in <xref linkend="contents-gcc" role="."/></para>
134
135 </sect2>
136
137</sect1>
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