1 | <?xml version="1.0" encoding="UTF-8"?>
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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-binutils-pass1" role="wrap" xreflabel="binutils-pass1">
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9 | <?dbhtml filename="binutils-pass1.html"?>
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10 |
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11 | <sect1info condition="script">
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12 | <productname>binutils-pass1</productname>
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13 | <productnumber>&binutils-version;</productnumber>
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14 | <address>&binutils-url;</address>
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15 | </sect1info>
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16 |
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17 | <title>Binutils-&binutils-version; - Pass 1</title>
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18 |
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19 | <indexterm zone="ch-tools-binutils-pass1">
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20 | <primary sortas="a-Binutils">Binutils</primary>
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21 | <secondary>tools, 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 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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28 | href="../chapter08/binutils.xml"
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29 | xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
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30 |
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31 | <segmentedlist>
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32 | <segtitle>&buildtime;</segtitle>
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33 | <segtitle>&diskspace;</segtitle>
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34 |
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35 | <seglistitem>
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36 | <seg>&binutils-tmpp1-sbu;</seg>
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37 | <seg>&binutils-tmpp1-du;</seg>
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38 | </seglistitem>
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39 | </segmentedlist>
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40 |
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41 | </sect2>
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42 |
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43 | <sect2 role="installation">
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44 | <title>Installation of Cross Binutils</title>
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45 |
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46 | <note><para>Go back and re-read the notes in the section titled <xref
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47 | linkend="ch-tools-generalinstructions"/>.
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48 | Understanding the notes labeled important can save you a lot
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49 | of problems later.</para></note>
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50 |
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51 | <para>It is important that Binutils be the first package compiled
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52 | because both Glibc and GCC perform various tests on the available
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53 | linker and assembler to determine which of their own features to
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54 | enable.</para>
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55 |
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56 | <para>The Binutils documentation recommends building Binutils
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57 | in a dedicated build directory:</para>
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58 |
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59 | <screen><userinput remap="pre">mkdir -v build
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60 | cd build</userinput></screen>
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61 |
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62 | <note>
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63 | <para>In order for the SBU values listed in the rest of the book
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64 | to be of any use, measure the time it takes to build this package from
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65 | the configuration, up to and including the first install. To achieve
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66 | this easily, wrap the commands in a <command>time</command>
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67 | command like this: <userinput>time { ../configure ... && make
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68 | && make install; }</userinput>.</para>
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69 | </note>
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70 |
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71 | <para>Now prepare Binutils for compilation:</para>
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72 |
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73 | <screen><userinput remap="configure">../configure --prefix=$LFS/tools \
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74 | --with-sysroot=$LFS \
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75 | --target=$LFS_TGT \
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76 | --disable-nls \
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77 | --enable-gprofng=no \
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78 | --disable-werror \
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79 | --enable-new-dtags \
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80 | --enable-default-hash-style=gnu</userinput></screen>
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81 |
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82 | <variablelist>
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83 | <title>The meaning of the configure options:</title>
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84 |
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85 | <varlistentry>
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86 | <term><parameter>--prefix=$LFS/tools</parameter></term>
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87 | <listitem>
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88 | <para>This tells the configure script to prepare to install the
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89 | Binutils programs in the <filename
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90 | class="directory">$LFS/tools</filename> directory.</para>
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91 | </listitem>
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92 | </varlistentry>
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93 |
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94 | <varlistentry>
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95 | <term><parameter>--with-sysroot=$LFS</parameter></term>
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96 | <listitem>
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97 | <para>For cross compilation, this tells the build system to look in
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98 | $LFS for the target system libraries as needed.</para>
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99 | </listitem>
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100 | </varlistentry>
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101 |
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102 | <varlistentry>
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103 | <term><envar>--target=$LFS_TGT</envar></term>
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104 | <listitem>
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105 | <para>Because the machine description in the <envar>LFS_TGT</envar>
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106 | variable is slightly different than the value returned by the
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107 | <command>config.guess</command> script, this switch will tell the
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108 | <command>configure</command> script to adjust binutil's build system
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109 | for building a cross linker. </para>
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110 | </listitem>
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111 | </varlistentry>
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112 |
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113 | <varlistentry>
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114 | <term><parameter>--disable-nls</parameter></term>
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115 | <listitem>
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116 | <para>This disables internationalization as i18n is not needed for the
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117 | temporary tools.</para>
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118 | </listitem>
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119 | </varlistentry>
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120 |
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121 | <varlistentry>
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122 | <term><parameter>--enable-gprofng=no</parameter></term>
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123 | <listitem>
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124 | <para>This disables building gprofng which is not needed for the
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125 | temporary tools.</para>
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126 | </listitem>
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127 | </varlistentry>
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128 |
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129 | <varlistentry>
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130 | <term><parameter>--disable-werror</parameter></term>
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131 | <listitem>
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132 | <para>This prevents the build from stopping in the event that there
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133 | are warnings from the host's compiler.</para>
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134 | </listitem>
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135 | </varlistentry>
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136 |
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137 | <varlistentry>
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138 | <term><parameter>--enable-new-dtags</parameter></term>
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139 | <listitem>
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140 | <para>This makes the linker use the <quote>runpath</quote> tag for
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141 | embedding library search paths into executables and shared libraries,
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142 | instead of the traditional <quote>rpath</quote> tag. It makes
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143 | debugging dynamically linked executables easier and works around
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144 | potential issues in the test suite of some packages.</para>
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145 | </listitem>
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146 | </varlistentry>
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147 |
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148 | <varlistentry>
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149 | <term><parameter>--enable-default-hash-style=gnu</parameter></term>
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150 | <listitem>
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151 | <para>By default, the linker would generate both the GNU-style
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152 | hash table and the classic ELF hash table for shared libraries and
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153 | dynamically linked executables. The hash tables are only intended
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154 | for a dynamic linker to perform symbol lookup. On LFS the dynamic
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155 | linker (provided by the Glibc package) will always use the
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156 | GNU-style hash table which is faster to query. So the classic
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157 | ELF hash table is completely useless. This makes the linker
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158 | only generate the GNU-style hash table by default, so we can avoid
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159 | wasting time to generate the classic ELF hash table when we build
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160 | the packages, or wasting disk space to store it.</para>
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161 | </listitem>
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162 | </varlistentry>
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163 |
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164 | </variablelist>
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165 |
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166 | <para>Continue with compiling the package:</para>
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167 |
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168 | <screen><userinput remap="make">make</userinput></screen>
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169 |
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170 | <para>Install the package:</para>
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171 |
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172 | <screen><userinput remap="install">make install</userinput></screen>
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173 |
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174 | </sect2>
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175 |
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176 | <sect2 role="content">
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177 | <title/>
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178 |
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179 | <para>Details on this package are located in
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180 | <xref linkend="contents-binutils" role="."/></para>
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181 |
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182 | </sect2>
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183 |
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184 | </sect1>
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