chapter05/libstdc++.xml

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   4   <!ENTITY % general-entities SYSTEM "../general.ent">
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   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
  59 cd       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/$LFS_TGT/include/c++/&gcc-version;</userinput></screen>
  71
  72     <variablelist>
  73       <title>The meaning of the configure options:</title>
  74
  75       <varlistentry>
  76         <term><parameter>--host=...</parameter></term>
  77         <listitem>
  78           <para>Specifies the use the cross compiler we have just built
  79           instead of the one in <filename>/usr/bin</filename>.</para>
  80         </listitem>
  81       </varlistentry>
  82
  83       <varlistentry>
  84         <term><parameter>--disable-libstdcxx-pch</parameter></term>
  85         <listitem>
  86           <para>This switch prevents the installation of precompiled
  87           include files, which are not needed at this stage.</para>
  88         </listitem>
  89       </varlistentry>
  90
  91       <varlistentry>
  92         <term><parameter>--with-gxx-include-dir=/tools/$LFS_TGT/include/c++/&gcc-version;</parameter></term>
  93         <listitem>
  94           <para>This is the location where the C++ compiler should search for the
  95           standard include files. In a normal build, this information
  96           is automatically passed to the libstdc++ <command>configure</command>
  97           options from the top level directory. In our case, this information
  98           must be explicitly given.</para>
  99         </listitem>
 100       </varlistentry>
 101
 102     </variablelist>
 103
 104     <para>Compile libstdc++ by running:</para>
 105
 106 <screen><userinput remap="make">make</userinput></screen>
 107
 108     <para>Install the library:</para>
 109
 110 <screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>
 111
 112   </sect2>
 113
 114   <sect2 role="content">
 115     <title/>
 116
 117     <para>Details on this package are located in
 118     <xref linkend="contents-gcc" role="."/></para>
 119
 120   </sect2>
 121
 122 </sect1>