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 | <!ENTITY rust-download-http "https://static.rust-lang.org/dist/rustc-&rust-version;-src.tar.gz">
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8 | <!ENTITY rust-download-ftp " ">
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9 | <!ENTITY rust-md5sum "6790c24fe5e8fb5a5f7efbfbcc6fea65">
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10 | <!ENTITY rust-size "101 MB">
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11 | <!ENTITY rust-buildsize "6.5 GB (679 MB installed) including 270MB of ~/.cargo files for the user building this (add 1.4GB if running the tests)">
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12 | <!ENTITY rust-time "27 SBU (add 13 SBU for tests, both with 4 processors)">
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13 | ]>
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14 |
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15 | <sect1 id="rust" xreflabel="rustc-&rust-version;">
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16 | <?dbhtml filename="rust.html"?>
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17 |
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18 | <sect1info>
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19 | <othername>$LastChangedBy$</othername>
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20 | <date>$Date$</date>
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21 | </sect1info>
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22 |
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23 | <title>Rustc-&rust-version;</title>
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24 |
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25 | <indexterm zone="rust">
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26 | <primary sortas="a-rust">Rust</primary>
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27 | </indexterm>
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28 |
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29 | <sect2 role="package">
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30 | <title>Introduction to Rust</title>
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31 |
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32 | <para>
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33 | The <application>Rust</application> programming language is designed
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34 | to be a safe, concurrent, practical language.
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35 | </para>
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36 |
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37 | <para>
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38 | As with many other programming languages, rustc (the rust compiler)
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39 | needs a binary from which to bootstrap. It will download a stage0 binary
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40 | and many cargo crates (these are actually .tar.gz source archives) at
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41 | the start of the build, so you cannot compile it without an internet
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42 | connection.
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43 | </para>
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44 |
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45 | <para>
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46 | The current <application>rustbuild</application> build-system will use
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47 | all available processors, although it does not scale well and often falls
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48 | back to just using one core while waiting for a library to compile.
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49 | </para>
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50 |
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51 | <para>
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52 | At the moment <application>Rust</application> does not provide any
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53 | guarantees of a stable ABI.
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54 | </para>
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55 |
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56 | <note>
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57 | <para>
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58 | Rustc defaults to building for ALL supported architectures, using a
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59 | shipped copy of LLVM. In BLFS the build is only for the X86 architecture.
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60 | Rustc still claims to require Python2, but that is only really necessary
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61 | when building some other architectures with the shipped LLVM. If you
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62 | intend to develop rust crates, this build may not be good enough for your
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63 | purposes.
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64 | </para>
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65 | <para>
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66 | Repeated builds of this package on the same machine show a wide range
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67 | of build times. Some of this might be due to variations in downloading
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68 | the required cargo files if they are not already present, but this does
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69 | not seem to adequately explain the variations.
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70 | </para>
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71 | <para>
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72 | Unusually, a DESTDIR-style method is being used to install this package.
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73 | This is because running the install as root not only downloads all of the
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74 | cargo files again (to <filename>/root/.cargo</filename>), it then spends
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75 | a very long time recompiling. Using this method saves a lot of time, at
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76 | the cost of extra disk space.
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77 | </para>
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78 | </note>
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79 |
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80 | &lfs83_checked;
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81 |
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82 | <bridgehead renderas="sect3">Package Information</bridgehead>
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83 | <itemizedlist spacing="compact">
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84 | <listitem>
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85 | <para>
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86 | Download (HTTP): <ulink url="&rust-download-http;"/>
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87 | </para>
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88 | </listitem>
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89 | <listitem>
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90 | <para>
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91 | Download (FTP): <ulink url="&rust-download-ftp;"/>
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92 | </para>
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93 | </listitem>
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94 | <listitem>
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95 | <para>
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96 | Download MD5 sum: &rust-md5sum;
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97 | </para>
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98 | </listitem>
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99 | <listitem>
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100 | <para>
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101 | Download size: &rust-size;
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102 | </para>
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103 | </listitem>
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104 | <listitem>
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105 | <para>
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106 | Estimated disk space required: &rust-buildsize;
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107 | </para>
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108 | </listitem>
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109 | <listitem>
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110 | <para>
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111 | Estimated build time: &rust-time;
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112 | </para>
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113 | </listitem>
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114 | </itemizedlist>
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115 |
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116 | <bridgehead renderas="sect3">Rust Dependencies</bridgehead>
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117 |
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118 | <bridgehead renderas="sect4">Required</bridgehead>
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119 | <para role="required">
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120 | <xref linkend="curl"/>,
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121 | <xref linkend="cmake"/>,
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122 | <xref linkend="libssh2"/>
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123 | <!-- <xref linkend="python2"/> -->
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124 | </para>
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125 |
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126 | <bridgehead renderas="sect4">Recommended</bridgehead>
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127 | <para role="recommended">
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128 | <package>clang</package> from <xref linkend="llvm"/>
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129 | (built with -DLLVM_LINK_LLVM_DYLIB=ON)
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130 | </para>
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131 |
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132 | <bridgehead renderas="sect4">Optional</bridgehead>
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133 | <para role="optional">
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134 | <xref linkend="gdb"/> (recommended if running the testsuite)
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135 | </para>
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136 |
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137 | <para condition="html" role="usernotes">
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138 | User Notes: <ulink url="&blfs-wiki;/rust"/>
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139 | </para>
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140 | </sect2>
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141 |
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142 | <sect2 role="installation">
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143 | <title>Installation of Rust</title>
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144 |
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145 | <note>
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146 | <para>
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147 | This package is updated on a six-weekly release cycle. Because it is
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148 | such a large and slow package to build, and is at the moment only required
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149 | by three packages in this book, the BLFS editors take the view that it
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150 | should only be updated when that is necessary.
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151 | </para>
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152 | </note>
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153 |
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154 | <para>
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155 | First create a suitable <filename>config.toml</filename> file
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156 | which will configure the build :
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157 | </para>
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158 |
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159 | <screen><userinput>cat << EOF > config.toml
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160 | # see config.toml.example for more possible options
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161 | [llvm]
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162 | targets = "X86"
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163 |
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164 | # When using system llvm prefer shared libraries
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165 | link-shared = true
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166 |
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167 | [build]
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168 | # install cargo as well as rust
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169 | extended = true
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170 |
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171 | [install]
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172 | prefix = "/usr"
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173 | docdir = "share/doc/rustc-&rust-version;"
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174 |
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175 | [rust]
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176 | channel = "stable"
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177 | rpath = false
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178 |
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179 | # BLFS does not install the FileCheck executable from llvm,
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180 | # so disable codegen tests
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181 | codegen-tests = false
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182 |
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183 | [target.x86_64-unknown-linux-gnu]
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184 | # delete this *section* if you are not using system llvm.
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185 | # NB the output of llvm-config (i.e. help options) may be
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186 | # dumped to the screen when config.toml is parsed.
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187 | llvm-config = "/usr/bin/llvm-config"
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188 |
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189 | EOF</userinput></screen>
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190 |
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191 | <para>
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192 | Now install <application>Rust</application> by running the following
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193 | commands:
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194 | </para>
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195 |
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196 | <screen><userinput>export RUSTFLAGS="$RUSTFLAGS -C link-args=-lffi" &&
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197 | python3 ./x.py build</userinput></screen>
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198 |
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199 | <para>
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200 | The build will report it failed to compile <filename>miri</filename>
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201 | because of multiple potential crates for `log`, but that should be followed
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202 | by a message that the build completed successfully.
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203 | </para>
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204 |
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205 | <caution>
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206 | <para>
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207 | On AMD Ryzen processors (family 17h), the non-optimized version of libstd
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208 | which is compiled at the start of the tests contains two opcodes which are
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209 | not implemented on this CPU family. These will be logged in the
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210 | <phrase revision="sysv">system log</phrase>
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211 | <phrase revision="systemd">systemd journal</phrase>
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212 | and will be followed a few minutes later by segmentation faults. Despite
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213 | that, the tests continue to run, apparently normally. But the system may
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214 | reboot before the tests have completed. The normal optimized libraries
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215 | run without this problem.
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216 | </para>
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217 | <para>
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218 | A mitigation is to install gdb
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219 | <!-- systemd apparently handles this with systemd-coredump -->
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220 | <phrase revision="sysv">and to run the tests with 'ulimit -C disabled'</phrase>
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221 | but this does not always prevent the system rebooting.
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222 | </para>
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223 | </caution>
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224 |
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225 | <para>
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226 | To run the tests issue
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227 | <command>python3 ./x.py test --verbose --no-fail-fast | tee rustc-testlog</command>:
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228 | as with the build, that will use all available CPUs. This runs many suites
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229 | of tests (in an apparently random order), several will fail in BLFS:
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230 | compile-fail/issue-37131.rs require a thumbv6m-none-eabi compiler but the
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231 | BLFS build does not cater for
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232 | that, ui/issue-49851/compiler-builtins-error.rs and ui/issue-50993.rs (both
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233 | run twice) require a thumbv7em-none-eabihf compiler, and seven tests in
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234 | debuginfo-gdb will fail because gdb-8.1 changed the output format. If
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235 | <application>gdb</application> has not been installed, most of the gdb tests
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236 | will fail.
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237 | </para>
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238 |
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239 | <para>
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240 | If you wish to look at the numbers for the results, you can find the total
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241 | number of tests which were considered by running:
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242 | </para>
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243 |
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244 | <screen><command>grep 'running .* tests' rustc-testlog | awk '{ sum += $2 } END { print sum }'</command></screen>
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245 |
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246 | <para>
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247 | That should report 17101 tests. Similarly, the total tests which failed can
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248 | be found by running:
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249 | </para>
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250 |
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251 | <screen><command>grep '^test result:' rustc-testlog | awk '{ sum += $6 } END { print sum }'</command></screen>
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252 |
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253 | <para>
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254 | And similarly for the tests which passed use $4, for those which were ignored
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255 | (i.e. skipped) use $8 (and $10 for 'measured', $12 for 'filtered out' but both
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256 | are probably zero). The breakdown does not match the overall total.
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257 | </para>
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258 |
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259 | <para>
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260 | Still as your normal user, do a DESTDIR install:
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261 | </para>
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262 |
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263 | <screen><userinput>export LIBSSH2_SYS_USE_PKG_CONFIG=1 &&
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264 | DESTDIR=${PWD}/install python3 ./x.py install &&
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265 | unset LIBSSH2_SYS_USE_PKG_CONFIG</userinput></screen>
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266 |
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267 | <para>
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268 | Now, as the <systemitem class="username">root</systemitem> user
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269 | install the files from the DESTDIR:
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270 | </para>
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271 |
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272 | <screen role="root"><userinput>chown -R root:root install &&
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273 | cp -a install/* /</userinput></screen>
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274 |
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275 | </sect2>
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276 |
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277 | <sect2 role="commands">
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278 | <title>Command Explanations</title>
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279 |
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280 | <para>
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281 | <command>targets = "X86"</command>: this avoids building all the available
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282 | linux cross-compilers (Aarch64, MIPS, PowerPC, SystemZ, etc). Unfortunately,
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283 | rust insists on installing source files for these below
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284 | <filename class="directory">/usr/lib/rustlib/src</filename>.
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285 | </para>
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286 |
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287 | <para>
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288 | <command>extended = true</command>: this installs Cargo alongside Rust.
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289 | </para>
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290 |
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291 | <para>
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292 | <command>channel = "stable"</command>: this ensures only stable features
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293 | can be used, the default in <filename>config.toml</filename> is to use
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294 | development features, which is not appropriate for a released version.
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295 | </para>
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296 |
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297 | <para>
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298 | <command>rpath = false</command>: by default, <command>rust</command> can
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299 | be run from where it was built, without being installed. That adds DT_RPATH
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300 | entries to all of the ELF files, which produces very messy output from
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301 | <command>ldd</command>, showing the libraries in the place they were built,
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302 | even if they have been deleted from there after the install.
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303 | </para>
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304 |
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305 | <para>
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306 | <command>[target.x86_64-unknown-linux-gnu]</command>: the syntax of
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307 | <filename>config.toml</filename> requires an <literal>llvm-config</literal>
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308 | entry for each target for which system-llvm is to be used. Change the target
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309 | to <literal>[target.i686-unknown-linux-gnu]</literal> if you are building
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310 | on 32-bit x86. This whole section may be omitted if you wish to build
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311 | against the shipped llvm, or do not have clang, but the resulting build will
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312 | be larger and take longer.
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313 | </para>
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314 |
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315 | <para>
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316 | <command>export RUSTFLAGS="$RUSTFLAGS -C link-args=-lffi"</command>:
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317 | This adds a link to libffi to any RUSTFLAGS you may already be passing
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318 | to the build. On some systems, linking fails to include libffi unless
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319 | this is used. The reason why this is needed is not clear.
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320 | </para>
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321 |
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322 | <para>
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323 | <command>--verbose</command>: this switch can sometimes provide more
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324 | information about a test which fails.
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325 | </para>
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326 |
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327 | <para>
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328 | <command>--no-fail-fast</command>: this switch ensures that the testsuite
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329 | will not stop at the first error.
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330 | </para>
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331 |
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332 | <para>
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333 | <command>export LIBSSH2_SYS_USE_PKG_CONFIG=1</command>: On some systems,
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334 | cairo fails to link during the install because it cannot find libssh2.
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335 | This seems to fix it, but again the reason why the problem occurs is not
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336 | understood.
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337 | </para>
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338 |
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339 | <para>
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340 | <command>DESTDIR=${PWD}/install ./x.py install</command>: This effects a
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341 | DESTDIR-style install in the source tree,creating an <filename
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342 | class="directory">install</filename> directory. Note that DESTDIR installs
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343 | need an absolute path, passing 'install' will not work.
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344 | </para>
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345 |
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346 | <para>
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347 | <command>chown -R root:root install</command>: the DESTDIR install
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348 | was run by a regular user, who owns the files. For security, change their
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349 | owner before doing a simple copy to install them.
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350 | </para>
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351 |
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352 | </sect2>
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353 |
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354 | <sect2 role="content">
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355 | <title>Contents</title>
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356 |
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357 | <segmentedlist>
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358 | <segtitle>Installed Programs</segtitle>
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359 | <segtitle>Installed Libraries</segtitle>
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360 | <segtitle>Installed Directories</segtitle>
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361 |
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362 | <seglistitem>
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363 | <seg>
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364 | cargo-clippy, cargo-fmt, cargo, clippy-driver, rls, rust-gdb, rust-lldb, rustc, rustdoc, rustfmt.
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365 | </seg>
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366 | <seg>
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367 | Many lib*<16-byte-hash>.so libraries.
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368 | </seg>
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369 | <seg>
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370 | ~/.cargo,
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371 | /usr/lib/rustlib,
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372 | /usr/share/doc/rustc-&rust-version;, and
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373 | /usr/share/zsh/site-functions/
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374 | </seg>
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375 | </seglistitem>
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376 | </segmentedlist>
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377 |
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378 | <variablelist>
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379 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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380 | <?dbfo list-presentation="list"?>
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381 | <?dbhtml list-presentation="table"?>
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382 |
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383 | <varlistentry id="cargo-clippy">
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384 | <term><command>cargo-clippy</command></term>
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385 | <listitem>
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386 | <para>
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387 | provides lint checks for a cargo package.
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388 | </para>
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389 | <indexterm zone="rust cargo-clippy">
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390 | <primary sortas="b-cargo-clippy">cargo-clippy</primary>
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391 | </indexterm>
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392 | </listitem>
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393 | </varlistentry>
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394 |
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395 | <varlistentry id="cargo-fmt">
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396 | <term><command>cargo-fmt</command></term>
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397 | <listitem>
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398 | <para>
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399 | formats all bin and lib files of the current crate using
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400 | rustfmt.
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401 | </para>
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402 | <indexterm zone="rust cargo-fmt">
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403 | <primary sortas="b-cargo-fmt">cargo-fmt</primary>
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404 | </indexterm>
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405 | </listitem>
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406 | </varlistentry>
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407 |
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408 | <varlistentry id="cargo">
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409 | <term><command>cargo</command></term>
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410 | <listitem>
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411 | <para>
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412 | is the Package Manager for Rust.
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413 | </para>
|
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414 | <indexterm zone="rust cargo">
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415 | <primary sortas="b-cargo">cargo</primary>
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416 | </indexterm>
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417 | </listitem>
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418 | </varlistentry>
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419 |
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420 | <varlistentry id="clippy-driver">
|
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421 | <term><command>clippy-driver</command></term>
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422 | <listitem>
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423 | <para>
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424 | provides lint checks for Rust.
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425 | </para>
|
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426 | <indexterm zone="rust clippy-driver">
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427 | <primary sortas="b-clippy-driver">clippy-driver</primary>
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428 | </indexterm>
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429 | </listitem>
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430 | </varlistentry>
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431 |
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432 | <varlistentry id="rls">
|
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433 | <term><command>rls</command></term>
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434 | <listitem>
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435 | <para>
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436 | is the Rust Language Server. This can run in the background to
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437 | provide IDEs, editors, and other tools with information about Rust
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438 | programs.
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439 | </para>
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440 | <indexterm zone="rust rls">
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441 | <primary sortas="b-rls">rls</primary>
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442 | </indexterm>
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443 | </listitem>
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444 | </varlistentry>
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445 |
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446 | <varlistentry id="rust-gdb">
|
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447 | <term><command>rust-gdb</command></term>
|
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448 | <listitem>
|
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449 | <para>
|
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450 | is a wrapper script for gdb, pulling in Python
|
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451 | pretty-printing modules installed in <filename
|
---|
452 | class="directory">/usr/lib/rustlib/etc</filename>.
|
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453 | </para>
|
---|
454 | <indexterm zone="rust rust-gdb">
|
---|
455 | <primary sortas="b-rust-gdb">rust-gdb</primary>
|
---|
456 | </indexterm>
|
---|
457 | </listitem>
|
---|
458 | </varlistentry>
|
---|
459 |
|
---|
460 | <varlistentry id="rust-lldb">
|
---|
461 | <term><command>rust-lldb</command></term>
|
---|
462 | <listitem>
|
---|
463 | <para>
|
---|
464 | is a wrapper script for LLDB (the LLVM debugger)
|
---|
465 | pulling in the Python pretty-printing modules.
|
---|
466 | </para>
|
---|
467 | <indexterm zone="rust rust-lldb">
|
---|
468 | <primary sortas="b-rust-lldb">rust=lldb</primary>
|
---|
469 | </indexterm>
|
---|
470 | </listitem>
|
---|
471 | </varlistentry>
|
---|
472 |
|
---|
473 | <varlistentry id="rustc">
|
---|
474 | <term><command>rustc</command></term>
|
---|
475 | <listitem>
|
---|
476 | <para>
|
---|
477 | is the rust compiler.
|
---|
478 | </para>
|
---|
479 | <indexterm zone="rust rustc">
|
---|
480 | <primary sortas="b-rustc">rustc</primary>
|
---|
481 | </indexterm>
|
---|
482 | </listitem>
|
---|
483 | </varlistentry>
|
---|
484 |
|
---|
485 | <varlistentry id="rustdoc">
|
---|
486 | <term><command>rustdoc</command></term>
|
---|
487 | <listitem>
|
---|
488 | <para>
|
---|
489 | generates documentation from rust source code.
|
---|
490 | </para>
|
---|
491 | <indexterm zone="rust rustdoc">
|
---|
492 | <primary sortas="b-rustdoc">rustdoc</primary>
|
---|
493 | </indexterm>
|
---|
494 | </listitem>
|
---|
495 | </varlistentry>
|
---|
496 |
|
---|
497 | <varlistentry id="rustfmt">
|
---|
498 | <term><command>rustfmt</command></term>
|
---|
499 | <listitem>
|
---|
500 | <para>
|
---|
501 | formats rust code.
|
---|
502 | </para>
|
---|
503 | <indexterm zone="rust rustfmt">
|
---|
504 | <primary sortas="b-rustfmt">rustfmt</primary>
|
---|
505 | </indexterm>
|
---|
506 | </listitem>
|
---|
507 | </varlistentry>
|
---|
508 |
|
---|
509 | <varlistentry id="libstd">
|
---|
510 | <term><filename class="libraryfile">libstd-<16-byte-hash>.so</filename></term>
|
---|
511 | <listitem>
|
---|
512 | <para>
|
---|
513 | is the Rust Standard Library, the foundation of portable Rust software.
|
---|
514 | </para>
|
---|
515 | <indexterm zone="rust libstd">
|
---|
516 | <primary sortas="c-libstd">libstd-<16-byte-hash>.so</primary>
|
---|
517 | </indexterm>
|
---|
518 | </listitem>
|
---|
519 | </varlistentry>
|
---|
520 | </variablelist>
|
---|
521 | </sect2>
|
---|
522 | </sect1>
|
---|