chapter05/libstdc++.xml

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