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-partitioning-hostreqs" xreflabel="Host System Requirements">
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9 | <?dbhtml filename="hostreqs.html"?>
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10 |
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11 | <title>Host System Requirements</title>
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12 |
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13 | <sect2>
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14 | <title>Hardware</title>
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15 |
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16 | <para>The LFS editors recommend that the system CPU have at least
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17 | four cores and that the system have at least 8 GB of memory.
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18 | Older systems that do not meet these requirements will still work,
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19 | but the time to build packages will be significantly longer
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20 | than documented.
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21 | </para>
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22 |
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23 | </sect2>
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24 |
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25 | <sect2>
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26 | <title>Software</title>
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27 |
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28 | <para>Your host system should have the following software with the
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29 | minimum versions indicated. This should not be an issue for most
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30 | modern Linux distributions. Also note that many distributions will
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31 | place software headers into separate packages, often in the form of
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32 | <literal><replaceable><package-name></replaceable>-devel</literal>
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33 | or
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34 | <literal><replaceable><package-name></replaceable>-dev</literal>.
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35 | Be sure to install those if your distribution provides them.</para>
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36 |
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37 | <para>Earlier versions of the listed software packages may work, but have
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38 | not been tested.</para>
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39 |
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40 | <itemizedlist spacing="compact">
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41 |
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42 | <listitem>
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43 | <para><emphasis role="strong">Bash-3.2</emphasis> (/bin/sh
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44 | should be a symbolic or hard link to bash)</para>
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45 | </listitem>
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46 |
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47 | <listitem>
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48 | <para><emphasis role="strong">Binutils-2.13.1</emphasis> (Versions
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49 | greater than &binutils-version; are not recommended as they have
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50 | not been tested)</para>
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51 | </listitem>
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52 |
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53 | <listitem>
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54 | <para><emphasis role="strong">Bison-2.7</emphasis> (/usr/bin/yacc
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55 | should be a link to bison or a small script that executes bison)</para>
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56 | </listitem>
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57 |
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58 | <!-- In Coreutils-8.1 the nproc program is added. -->
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59 | <listitem>
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60 | <para><emphasis role="strong">Coreutils-8.1</emphasis></para>
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61 | </listitem>
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62 |
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63 | <listitem>
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64 | <para><emphasis role="strong">Diffutils-2.8.1</emphasis></para>
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65 | </listitem>
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66 |
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67 | <listitem>
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68 | <para><emphasis role="strong">Findutils-4.2.31</emphasis></para>
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69 | </listitem>
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70 |
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71 | <listitem>
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72 | <para><emphasis role="strong">Gawk-4.0.1</emphasis> (/usr/bin/awk
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73 | should be a link to gawk)</para>
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74 | </listitem>
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75 |
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76 | <listitem>
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77 | <!-- Pass 1 GCC FTBFS with GCC-5.1 because of
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78 | https://gcc.gnu.org/PR65801. -->
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79 | <para><emphasis role="strong">GCC-5.2</emphasis> including the C++
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80 | compiler, <command>g++</command> (Versions greater than &gcc-version; are
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81 | not recommended as they have not been tested). C and C++ standard
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82 | libraries (with headers) must also be present so the C++ compiler can
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83 | build hosted programs</para>
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84 | </listitem>
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85 |
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86 | <listitem>
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87 | <para><emphasis role="strong">Grep-2.5.1a</emphasis></para>
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88 | </listitem>
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89 |
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90 | <listitem>
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91 | <para><emphasis role="strong">Gzip-1.3.12</emphasis></para>
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92 | </listitem>
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93 |
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94 | <listitem>
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95 | <para><emphasis role="strong">Linux Kernel-&min-kernel;</emphasis></para>
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96 |
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97 | <para>The reason for the kernel version requirement is that we specify
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98 | that version when building <application>glibc</application> in
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99 | <xref linkend="chapter-cross-tools"/> and
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100 | <xref linkend="chapter-building-system"/>, so the workarounds for
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101 | older kernels are not enabled and the compiled
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102 | <application>glibc</application> is slightly faster and smaller.
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103 | As at Feb 2024, &min-kernel; is the oldest kernel release still
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104 | supported by the kernel developers. Some kernel releases older than
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105 | &min-kernel; may be still supported by third-party teams, but they
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106 | are not considered official upstream kernel releases; read
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107 | <ulink url='https://kernel.org/category/releases.html'/> for the
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108 | details.</para>
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109 |
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110 | <para>If the host kernel is earlier than &min-kernel; you will need to replace
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111 | the kernel with a more up-to-date version. There are two ways
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112 | you can go about this. First, see if your Linux vendor provides a &min-kernel;
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113 | or later kernel package. If so, you may wish to install it. If your
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114 | vendor doesn't offer an acceptable kernel package, or you would prefer not to
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115 | install it, you can compile a kernel yourself. Instructions for
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116 | compiling the kernel and configuring the boot loader (assuming the host
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117 | uses GRUB) are located in <xref linkend="chapter-bootable"/>.</para>
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118 |
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119 | <para>We require the host kernel to support UNIX 98 pseudo terminal
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120 | (PTY). It should be enabled on all desktop or server distros shipping
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121 | Linux &min-kernel; or a newer kernel. If you are building a custom
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122 | host kernel, ensure <option>CONFIG_UNIX98_PTYS</option> is set to
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123 | <literal>y</literal> in the kernel configuration.</para>
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124 |
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125 | </listitem>
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126 |
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127 | <listitem>
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128 | <para><emphasis role="strong">M4-1.4.10</emphasis></para>
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129 | </listitem>
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130 |
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131 | <listitem>
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132 | <para><emphasis role="strong">Make-4.0</emphasis></para>
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133 | </listitem>
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134 |
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135 | <listitem>
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136 | <para><emphasis role="strong">Patch-2.5.4</emphasis></para>
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137 | </listitem>
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138 |
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139 | <listitem>
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140 | <para><emphasis role="strong">Perl-5.8.8</emphasis></para>
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141 | </listitem>
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142 |
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143 | <listitem>
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144 | <para><emphasis role="strong">Python-3.4</emphasis></para>
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145 | </listitem>
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146 |
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147 | <listitem>
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148 | <para><emphasis role="strong">Sed-4.1.5</emphasis></para>
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149 | </listitem>
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150 |
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151 | <listitem>
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152 | <para><emphasis role="strong">Tar-1.22</emphasis></para>
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153 | </listitem>
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154 |
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155 | <listitem>
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156 | <para><emphasis role="strong">Texinfo-5.0</emphasis></para>
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157 | </listitem>
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158 |
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159 | <listitem>
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160 | <para><emphasis role="strong">Xz-5.0.0</emphasis></para>
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161 | </listitem>
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162 |
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163 | </itemizedlist>
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164 |
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165 | <important>
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166 | <para>Note that the symlinks mentioned above are required to build an LFS
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167 | system using the instructions contained within this book. Symlinks that
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168 | point to other software (such as dash, mawk, etc.) may work, but are not
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169 | tested or supported by the LFS development team, and may require either
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170 | deviation from the instructions or additional patches to some
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171 | packages.</para>
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172 | </important>
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173 |
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174 | <!-- Use an empty sect2 element to prevent a pdf warning. -->
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175 | <bridgehead renderas="sect2"
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176 | id="version-check"
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177 | xreflabel="Host System Requirements">
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178 | </bridgehead>
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179 | <!--<title> </title>-->
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180 |
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181 | <para >To see whether your host system has all the appropriate versions, and
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182 | the ability to compile programs, run the following commands:</para>
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183 |
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184 | <screen role="nodump"><?dbfo keep-together="auto"?><userinput>cat > version-check.sh << "EOF"
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185 | <literal>#!/bin/bash
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186 | # A script to list version numbers of critical development tools
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187 |
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188 | # If you have tools installed in other directories, adjust PATH here AND
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189 | # in ~lfs/.bashrc (section 4.4) as well.
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190 |
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191 | LC_ALL=C
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192 | PATH=/usr/bin:/bin
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193 |
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194 | bail() { echo "FATAL: $1"; exit 1; }
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195 | grep --version > /dev/null 2> /dev/null || bail "grep does not work"
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196 | sed '' /dev/null || bail "sed does not work"
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197 | sort /dev/null || bail "sort does not work"
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198 |
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199 | ver_check()
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200 | {
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201 | if ! type -p $2 &>/dev/null
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202 | then
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203 | echo "ERROR: Cannot find $2 ($1)"; return 1;
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204 | fi
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205 | v=$($2 --version 2>&1 | grep -E -o '[0-9]+\.[0-9\.]+[a-z]*' | head -n1)
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206 | if printf '%s\n' $3 $v | sort --version-sort --check &>/dev/null
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207 | then
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208 | printf "OK: %-9s %-6s >= $3\n" "$1" "$v"; return 0;
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209 | else
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210 | printf "ERROR: %-9s is TOO OLD ($3 or later required)\n" "$1";
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211 | return 1;
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212 | fi
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213 | }
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214 |
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215 | ver_kernel()
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216 | {
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217 | kver=$(uname -r | grep -E -o '^[0-9\.]+')
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218 | if printf '%s\n' $1 $kver | sort --version-sort --check &>/dev/null
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219 | then
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220 | printf "OK: Linux Kernel $kver >= $1\n"; return 0;
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221 | else
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222 | printf "ERROR: Linux Kernel ($kver) is TOO OLD ($1 or later required)\n" "$kver";
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223 | return 1;
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224 | fi
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225 | }
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226 |
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227 | # Coreutils first because --version-sort needs Coreutils >= 7.0
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228 | ver_check Coreutils sort 8.1 || bail "Coreutils too old, stop"
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229 | ver_check Bash bash 3.2
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230 | ver_check Binutils ld 2.13.1
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231 | ver_check Bison bison 2.7
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232 | ver_check Diffutils diff 2.8.1
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233 | ver_check Findutils find 4.2.31
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234 | ver_check Gawk gawk 4.0.1
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235 | ver_check GCC gcc 5.2
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236 | ver_check "GCC (C++)" g++ 5.2
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237 | ver_check Grep grep 2.5.1a
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238 | ver_check Gzip gzip 1.3.12
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239 | ver_check M4 m4 1.4.10
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240 | ver_check Make make 4.0
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241 | ver_check Patch patch 2.5.4
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242 | ver_check Perl perl 5.8.8
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243 | ver_check Python python3 3.4
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244 | ver_check Sed sed 4.1.5
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245 | ver_check Tar tar 1.22
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246 | ver_check Texinfo texi2any 5.0
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247 | ver_check Xz xz 5.0.0
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248 | ver_kernel &min-kernel;
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249 |
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250 | if mount | grep -q 'devpts on /dev/pts' && [ -e /dev/ptmx ]
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251 | then echo "OK: Linux Kernel supports UNIX 98 PTY";
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252 | else echo "ERROR: Linux Kernel does NOT support UNIX 98 PTY"; fi
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253 |
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254 | alias_check() {
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255 | if $1 --version 2>&1 | grep -qi $2
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256 | then printf "OK: %-4s is $2\n" "$1";
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257 | else printf "ERROR: %-4s is NOT $2\n" "$1"; fi
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258 | }
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259 | echo "Aliases:"
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260 | alias_check awk GNU
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261 | alias_check yacc Bison
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262 | alias_check sh Bash
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263 |
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264 | echo "Compiler check:"
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265 | if printf "int main(){}" | g++ -x c++ -
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266 | then echo "OK: g++ works";
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267 | else echo "ERROR: g++ does NOT work"; fi
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268 | rm -f a.out
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269 |
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270 | if [ "$(nproc)" = "" ]; then
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271 | echo "ERROR: nproc is not available or it produces empty output"
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272 | else
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273 | echo "OK: nproc reports $(nproc) logical cores are available"
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274 | fi</literal>
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275 | EOF
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276 |
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277 | bash version-check.sh</userinput></screen>
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278 |
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279 | </sect2>
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280 | </sect1>
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