1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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5 | %general-entities;
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6 | ]>
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7 |
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8 | <sect1 id="ch-tools-libstdcpp" role="wrap">
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9 | <?dbhtml filename="gcc-libstdc++.html"?>
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10 |
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11 | <sect1info condition="script">
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12 | <productname>gcc-libstdc++</productname>
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13 | <productnumber>&gcc-version;</productnumber>
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14 | <address>&gcc-url;</address>
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15 | </sect1info>
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16 |
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17 | <title>Libstdc++ from GCC-&gcc-version;</title>
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18 |
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19 | <indexterm zone="ch-tools-libstdcpp">
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20 | <primary sortas="a-GCC">GCC</primary>
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21 | <secondary>tools, libstdc++</secondary>
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22 | </indexterm>
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23 |
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24 | <sect2 role="package">
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25 | <title/>
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26 |
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27 | <para>Libstdc++ is the standard C++ library. It is needed
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28 | to compile C++ code
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29 | (part of GCC is written in C++), but we had to defer its installation
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30 | when we built <xref linkend="ch-tools-gcc-pass1"/>
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31 | because it depends on glibc, which was not yet available in /tools.
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32 | </para>
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33 |
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34 | <segmentedlist>
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35 | <segtitle>&buildtime;</segtitle>
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36 | <segtitle>&diskspace;</segtitle>
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37 |
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38 | <seglistitem>
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39 | <seg>&libstdcpp-ch5-sbu;</seg>
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40 | <seg>&libstdcpp-ch5-du;</seg>
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41 | </seglistitem>
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42 | </segmentedlist>
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43 |
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44 | </sect2>
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45 |
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46 | <sect2 role="installation">
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47 | <title>Installation of Target Libstdc++</title>
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48 |
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49 | <note>
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50 | <para><application>Libstdc++</application> is part of the GCC sources.
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51 | You should first unpack the GCC tarball and change to the
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52 | <filename>gcc-&gcc-version;</filename> directory.</para>
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53 | </note>
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54 |
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55 | <para>Create a separate build directory for Libstdc++ and enter it:</para>
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56 |
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57 | <screen><userinput remap="pre">mkdir -v build
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58 | cd build</userinput></screen>
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59 |
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60 | <para>Prepare Libstdc++ for compilation:</para>
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61 |
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62 | <screen><userinput remap="configure">../libstdc++-v3/configure \
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63 | --host=$LFS_TGT \
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64 | --prefix=/tools \
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65 | --disable-multilib \
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66 | --disable-nls \
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67 | --disable-libstdcxx-threads \
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68 | --disable-libstdcxx-pch \
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69 | --with-gxx-include-dir=/tools/$LFS_TGT/include/c++/&gcc-version;</userinput></screen>
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70 |
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71 | <variablelist>
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72 | <title>The meaning of the configure options:</title>
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73 |
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74 | <varlistentry>
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75 | <term><parameter>--host=...</parameter></term>
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76 | <listitem>
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77 | <para>Indicates to use the cross compiler we have just built
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78 | instead of the one in <filename>/usr/bin</filename>.</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>--disable-libstdcxx-threads</parameter></term>
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84 | <listitem>
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85 | <para>Since we have not yet built the C threads library, the C++
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86 | one cannot be built either.</para>
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87 | </listitem>
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88 | </varlistentry>
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89 |
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90 | <varlistentry>
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91 | <term><parameter>--disable-libstdcxx-pch</parameter></term>
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92 | <listitem>
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93 | <para>This switch prevents the installation of precompiled
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94 | include files, which are not needed at this stage.</para>
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95 | </listitem>
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96 | </varlistentry>
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97 |
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98 | <varlistentry>
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99 | <term><parameter>--with-gxx-include-dir=/tools/$LFS_TGT/include/c++/&gcc-version;</parameter></term>
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100 | <listitem>
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101 | <para>This is the location where the standard include files are
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102 | searched by the C++ compiler. In a normal build, this information
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103 | is automatically passed to the Libstdc++ <command>configure</command>
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104 | options from the top level directory. In our case, this information
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105 | must be explicitly given.</para>
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106 | </listitem>
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107 | </varlistentry>
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108 |
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109 | </variablelist>
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110 |
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111 | <para>Compile libstdc++ by running:</para>
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112 |
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113 | <screen><userinput remap="make">make</userinput></screen>
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114 |
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115 | <para>Install the library:</para>
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116 |
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117 | <screen><userinput remap="install">make install</userinput></screen>
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118 |
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119 | </sect2>
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120 |
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121 | <sect2 role="content">
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122 | <title/>
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123 |
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124 | <para>Details on this package are located in
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125 | <xref linkend="contents-gcc" role="."/></para>
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126 |
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127 | </sect2>
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128 |
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129 | </sect1>
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