source: chapter05/libstdc++.xml@ ceebda5

ml-11.0 multilib
Last change on this file since ceebda5 was ceebda5, checked in by Xℹ Ruoyao <xry111@…>, 17 months ago

Merge changes from trunk to multilib

git-svn-id: http://svn.linuxfromscratch.org/LFS/branches/multilib@12176 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-pass1" role="wrap">
9 <?dbhtml filename="gcc-libstdc++-pass1.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 1</title>
18
19 <indexterm zone="ch-tools-libstdcpp-pass1">
20 <primary sortas="a-GCC">GCC</primary>
21 <secondary>tools, libstdc++ pass 1</secondary>
22 </indexterm>
23
24 <sect2 role="package">
25 <title/>
26
27 <para>Libstdc++ is the standard C++ library. It is needed
28 to compile C++ code
29 (part of GCC is written in C++), but we had to defer its installation
30 when we built <xref linkend="ch-tools-gcc-pass1"/>
31 because it depends on glibc, which was not yet available in the target
32 directory.
33 </para>
34
35 <segmentedlist>
36 <segtitle>&buildtime;</segtitle>
37 <segtitle>&diskspace;</segtitle>
38
39 <seglistitem>
40 <seg>&libstdcpp-tmpp1-sbu;</seg>
41 <seg>&libstdcpp-tmpp1-du;</seg>
42 </seglistitem>
43 </segmentedlist>
44
45 </sect2>
46
47 <sect2 role="installation">
48 <title>Installation of Target Libstdc++</title>
49
50 <note>
51 <para><application>Libstdc++</application> is part of the GCC sources.
52 You should first unpack the GCC tarball and change to the
53 <filename>gcc-&gcc-version;</filename> directory.</para>
54 </note>
55
56 <para>Create a separate build directory for libstdc++ and enter it:</para>
57
58<screen><userinput remap="pre">mkdir -v build
59cd build</userinput></screen>
60
61 <para>Prepare libstdc++ for compilation:</para>
62
63<screen><userinput remap="configure">../libstdc++-v3/configure \
64 --host=$LFS_TGT \
65 --build=$(../config.guess) \
66 --prefix=/usr \
67 --disable-multilib \
68 --disable-nls \
69 --disable-libstdcxx-pch \
70 --with-gxx-include-dir=/tools/$LFS_TGT/include/c++/&gcc-version;</userinput></screen>
71
72 <variablelist>
73 <title>The meaning of the configure options:</title>
74
75 <varlistentry>
76 <term><parameter>--host=...</parameter></term>
77 <listitem>
78 <para>Specifies that the cross compiler we have just built
79 should be used instead of the one in
80 <filename>/usr/bin</filename>.</para>
81 </listitem>
82 </varlistentry>
83
84 <varlistentry arch="ml_32,ml_x32,ml_all">
85 <term><parameter>--disable-multilib</parameter></term>
86 <listitem>
87 <para>Even when building the multilib version, this switch is
88 given. This is because the additionally built libraries are
89 not required in this stage and some disk space and compile
90 time can be saved.</para>
91 </listitem>
92 </varlistentry>
93
94 <varlistentry>
95 <term><parameter>--disable-libstdcxx-pch</parameter></term>
96 <listitem>
97 <para>This switch prevents the installation of precompiled
98 include files, which are not needed at this stage.</para>
99 </listitem>
100 </varlistentry>
101
102 <varlistentry>
103 <term><parameter>--with-gxx-include-dir=/tools/$LFS_TGT/include/c++/&gcc-version;</parameter></term>
104 <listitem>
105 <para>This is the location where the C++ compiler should search for the
106 standard include files. In a normal build, this information
107 is automatically passed to the libstdc++ <command>configure</command>
108 options from the top level directory. In our case, this information
109 must be explicitly given.</para>
110 </listitem>
111 </varlistentry>
112
113 </variablelist>
114
115 <para>Compile libstdc++ by running:</para>
116
117<screen><userinput remap="make">make</userinput></screen>
118
119 <para>Install the library:</para>
120
121<screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>
122
123 </sect2>
124
125 <sect2 role="content">
126 <title/>
127
128 <para>Details on this package are located in
129 <xref linkend="contents-gcc" role="."/></para>
130
131 </sect2>
132
133</sect1>
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