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++ pass 1</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 Libstdc++ depends on Glibc, which was not yet available in the target
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32 | directory.
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33 | </para>
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34 |
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35 | <segmentedlist>
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36 | <segtitle>&buildtime;</segtitle>
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37 | <segtitle>&diskspace;</segtitle>
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38 |
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39 | <seglistitem>
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40 | <seg>&libstdcpp-tmpp1-sbu;</seg>
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41 | <seg>&libstdcpp-tmpp1-du;</seg>
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42 | </seglistitem>
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43 | </segmentedlist>
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44 |
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45 | </sect2>
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46 |
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47 | <sect2 role="installation">
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48 | <title>Installation of Target Libstdc++</title>
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49 |
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50 | <note>
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51 | <para><application>Libstdc++</application> is part of the GCC sources.
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52 | You should first unpack the GCC tarball and change to the
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53 | <filename>gcc-&gcc-version;</filename> directory.</para>
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54 | </note>
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55 |
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56 | <para>Create a separate build directory for Libstdc++ and enter it:</para>
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57 |
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58 | <screen><userinput remap="pre">mkdir -v build
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59 | cd build</userinput></screen>
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60 |
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61 | <para>Prepare Libstdc++ for compilation:</para>
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62 |
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63 | <screen><userinput remap="configure">../libstdc++-v3/configure \
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64 | --host=$LFS_TGT \
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65 | --build=$(../config.guess) \
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66 | --prefix=/usr \
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67 | --disable-multilib \
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68 | --disable-nls \
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69 | --disable-libstdcxx-pch \
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70 | --with-gxx-include-dir=/tools/$LFS_TGT/include/c++/&gcc-version;</userinput></screen>
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71 |
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72 | <variablelist>
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73 | <title>The meaning of the configure options:</title>
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74 |
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75 | <varlistentry>
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76 | <term><parameter>--host=...</parameter></term>
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77 | <listitem>
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78 | <para>Specifies that the cross-compiler we have just built
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79 | should be used instead of the one in
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80 | <filename>/usr/bin</filename>.</para>
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81 | </listitem>
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82 | </varlistentry>
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83 |
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84 | <varlistentry>
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85 | <term><parameter>--disable-libstdcxx-pch</parameter></term>
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86 | <listitem>
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87 | <para>This switch prevents the installation of precompiled
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88 | include files, which are not needed at this stage.</para>
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89 | </listitem>
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90 | </varlistentry>
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91 |
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92 | <varlistentry>
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93 | <term><parameter>--with-gxx-include-dir=/tools/$LFS_TGT/include/c++/&gcc-version;</parameter></term>
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94 | <listitem>
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95 | <para>This specifies the installation directory for include files.
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96 | Because Libstdc++ is the standard C++ library for LFS, this
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97 | directory should match the location where the C++ compiler
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98 | (<command>$LFS_TGT-g++</command>) would search for the
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99 | standard C++ include files. In a normal build, this information
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100 | is automatically passed to the Libstdc++ <command>configure</command>
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101 | options from the top level directory. In our case, this information
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102 | must be explicitly given.
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103 | The C++ compiler will prepend the sysroot path
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104 | <filename class="directory">$LFS</filename> (specified when building
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105 | GCC-pass1) to the include file search path, so it will actually
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106 | search in
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107 | <filename class="directory">$LFS/tools/$LFS_TGT/include/c++/&gcc-version;</filename>.
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108 | The combination of the <parameter>DESTDIR</parameter>
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109 | variable (in the <command>make install</command> command below)
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110 | and this switch causes the headers to be installed there.</para>
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111 | </listitem>
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112 | </varlistentry>
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113 |
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114 | </variablelist>
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115 |
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116 | <para>Compile Libstdc++ by running:</para>
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117 |
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118 | <screen><userinput remap="make">make</userinput></screen>
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119 |
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120 | <para>Install the library:</para>
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121 |
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122 | <screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>
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123 |
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124 | <para>Remove the libtool archive files because they are harmful for
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125 | cross-compilation:</para>
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126 |
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127 | <screen><userinput remap="install">rm -v $LFS/usr/lib/lib{stdc++{,exp,fs},supc++}.la</userinput></screen>
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128 |
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129 | </sect2>
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130 |
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131 | <sect2 role="content">
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132 | <title/>
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133 |
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134 | <para>Details on this package are located in
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135 | <xref linkend="contents-gcc" role="."/></para>
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136 |
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137 | </sect2>
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138 |
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139 | </sect1>
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