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-pass2" role="wrap">
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9 | <?dbhtml filename="gcc-libstdc++-pass2.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;, Pass 2</title>
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18 |
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19 | <indexterm zone="ch-tools-libstdcpp-pass2">
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20 | <primary sortas="a-GCC">GCC</primary>
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21 | <secondary>tools, libstdc++ pass 2</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>When building <xref linkend="ch-tools-gcc-pass2"/> we had to defer
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28 | the installation of the C++ standard library because no suitable compiler
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29 | was available to compile it. We could not use the compiler built in that
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30 | section because it is a native compiler and should not be used outside of
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31 | chroot and risks polluting the libraries with some host components.</para>
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32 |
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33 | <segmentedlist>
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34 | <segtitle>&buildtime;</segtitle>
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35 | <segtitle>&diskspace;</segtitle>
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36 |
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37 | <seglistitem>
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38 | <seg>&libstdcpp-tmpp2-sbu;</seg>
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39 | <seg>&libstdcpp-tmpp2-du;</seg>
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40 | </seglistitem>
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41 | </segmentedlist>
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42 |
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43 | </sect2>
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44 |
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45 | <sect2 role="installation">
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46 | <title>Installation of Target Libstdc++</title>
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47 |
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48 | <note>
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49 | <para><application>Libstdc++</application> is part of the GCC sources.
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50 | You should first unpack the GCC tarball and change to the
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51 | <filename>gcc-&gcc-version;</filename> directory.</para>
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52 | </note>
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53 |
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54 | <para>Create a link which exists when building libstdc++ in the gcc tree:</para>
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55 |
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56 | <screen><userinput remap="pre">ln -s gthr-posix.h libgcc/gthr-default.h</userinput></screen>
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57 |
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58 | <para>Create a separate build directory for libstdc++ and enter it:</para>
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59 |
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60 | <screen><userinput remap="pre">mkdir -v build
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61 | cd build</userinput></screen>
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62 |
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63 | <para>Prepare libstdc++ for compilation:</para>
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64 |
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65 | <screen arch="default"><userinput remap="configure">../libstdc++-v3/configure \
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66 | CXXFLAGS="-g -O2 -D_GNU_SOURCE" \
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67 | --prefix=/usr \
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68 | --disable-multilib \
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69 | --disable-nls \
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70 | --host=$(uname -m)-lfs-linux-gnu \
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71 | --disable-libstdcxx-pch</userinput></screen>
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72 | <screen arch="ml_32,ml_x32,ml_all"><userinput remap="configure">../libstdc++-v3/configure \
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73 | CXXFLAGS="-g -O2 -D_GNU_SOURCE" \
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74 | --prefix=/usr \
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75 | --enable-multilib \
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76 | --disable-nls \
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77 | --host=$(uname -m)-lfs-linux-gnu \
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78 | --disable-libstdcxx-pch</userinput></screen>
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79 |
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80 | <variablelist>
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81 | <title>The meaning of the configure options:</title>
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82 |
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83 | <varlistentry>
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84 | <term><parameter>CXXFLAGS="-g -O2 -D_GNU_SOURCE"</parameter></term>
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85 | <listitem>
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86 | <para>These flags are passed by the top level Makefile when doing
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87 | a full build of GCC.</para>
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88 | </listitem>
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89 | </varlistentry>
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90 |
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91 | <varlistentry>
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92 | <term><parameter>--host=$(uname -m)-lfs-linux-gnu</parameter></term>
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93 | <listitem>
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94 | <para>We have to mimic what would happen if this package were built
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95 | as part of a full compiler build. This switch would be passed to
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96 | configure by GCC's build machinery.</para>
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97 | </listitem>
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98 | </varlistentry>
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99 |
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100 | <varlistentry>
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101 | <term><parameter>--disable-libstdcxx-pch</parameter></term>
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102 | <listitem>
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103 | <para>This switch prevents the installation of precompiled
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104 | include files, which are not needed at this stage.</para>
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105 | </listitem>
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106 | </varlistentry>
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107 |
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108 | <varlistentry arch="ml_32,ml_x32,ml_all">
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109 | <term><parameter>--enable-multilib</parameter></term>
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110 | <listitem>
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111 | <para>This switch is set by default but it is added here
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112 | explicitly for documentary purpose. The libstdc++ libraries
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113 | will be built for every arch (m64, m32, mx32) which are
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114 | made available in <xref linkend="ch-tools-gcc-pass1"/>.</para>
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115 | </listitem>
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116 | </varlistentry>
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117 |
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118 | </variablelist>
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119 |
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120 | <para>Compile libstdc++ by running:</para>
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121 |
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122 | <screen><userinput remap="make">make</userinput></screen>
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123 |
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124 | <para>Install the library:</para>
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125 |
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126 | <screen><userinput remap="install">make install</userinput></screen>
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127 |
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128 | </sect2>
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129 |
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130 | <sect2 role="content">
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131 | <title/>
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132 |
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133 | <para>Details on this package are located in <xref linkend="contents-gcc" role="."/></para>
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134 |
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135 | </sect2>
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136 |
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137 | </sect1>
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