Mercurial > hg > aboriginal
annotate build.sh @ 1524:60ef4cdee782
Oops, forgot to check in patch removed by busybox upgrade.
author | Rob Landley <rob@landley.net> |
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date | Sat, 12 May 2012 21:35:58 -0500 |
parents | 9c2b7ec6b0c7 |
children | 045160e8ad71 |
rev | line source |
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1 #!/bin/bash |
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2 |
888 | 3 # Run all the steps needed to build a system image from scratch. |
4 | |
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5 # The default set of stages run by this script is (in order): |
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6 # download, host-tools, simple-cross-compiler, simple-root-filesystem, |
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7 # native-compiler, root-filesystem, system-image. |
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8 |
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9 # That sanitizes the host build environment and builds a cross compiler, |
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10 # cross compiles a root filesystem and a native toolchain for the target, |
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11 # and finally packages the root filesystem up into a system image bootable |
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12 # by qemu. |
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13 |
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14 # The simplest set of stages is: |
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15 # download, simple-cross-compiler, simple-root-filesystem, system-image. |
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16 # |
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17 # That skips sanitizing the host environment, and skips building the native |
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18 # compiler. It builds a system image containing just enough code to boot to |
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19 # a command prompt. To invoke that, do: |
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20 # |
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21 # NO_HOST_TOOLS=1 NO_NATIVE_COMPILER=1 ./build.sh $TARGET |
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22 |
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23 # The optional cross-compiler stage (after simple-cross-compiler but before |
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24 # simple-root-filesystem) creates a more powerful and portable cross compiler |
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25 # that can be used to cross compile more stuff (if you're into that sort of |
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26 # thing). To enable that: |
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27 |
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28 # CROSS_COMPILER_HOST=i686 ./build.sh $TARGET |
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29 |
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30 # Where "i686" is whichever target you want the new cross compiler to run on. |
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31 |
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32 # If this script was run with no arguments, list available architectures |
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33 |
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34 [ ! -z "$2" ] && REBUILD="$2" |
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35 |
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36 if [ $# -lt 1 ] || [ $# -gt 2 ] || [ ! -e sources/targets/"$1" ] |
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37 then |
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38 echo "Usage: $0 TARGET [REBUILD_FROM_STAGE]" |
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39 |
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40 echo "Supported architectures:" |
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41 ls sources/targets |
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42 |
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43 exit 1 |
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44 fi |
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45 ARCH="$1" |
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46 |
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47 # Use environment variables persistently set in the config file. |
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48 |
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49 [ -e config ] && source config |
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50 |
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51 # Allow the output directory to be overridden. This hasn't been tested in |
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52 # forever and probably doesn't work. |
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53 |
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54 [ -z "$BUILD" ] && BUILD="build" |
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55 |
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56 # Very simple dependency tracking: skip stages that have already been done |
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57 # (because the tarball they create is already there). |
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58 |
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59 # If you need to rebuild a stage (and everything after it), delete its |
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60 # tarball out of "build" and re-run build.sh. |
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61 |
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62 not_already() |
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63 { |
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64 [ "$REBUILD" == "$1" ] && zap "$1" |
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65 |
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66 if [ -f "$BUILD/$1-$ARCH.tar.bz2" ] |
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67 then |
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68 echo "=== Skipping $1-$ARCH (already there)" |
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69 return 1 |
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70 fi |
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71 |
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72 return 0 |
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73 } |
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74 |
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75 zap() |
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76 { |
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77 for i in "$@" |
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78 do |
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79 rm -f "$BUILD/$i-$ARCH.tar.bz2" |
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80 done |
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81 } |
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82 |
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83 # The first two stages (download.sh and host-tools.sh) are architecture |
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84 # independent. In order to allow multiple builds in parallel, re-running |
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85 # them after they've already completed must be a safe NOP. |
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86 |
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87 # Download source code. |
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88 |
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89 time ./download.sh || exit 1 |
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90 |
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91 # Build host tools. This populates a single directory with every command the |
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92 # build needs, so we can ditch the host's $PATH afterwards. |
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93 |
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94 if [ -z "$NO_HOST_TOOLS" ] |
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95 then |
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96 time ./host-tools.sh || exit 1 |
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97 fi |
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98 |
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99 # Do we need to build the simple cross compiler? |
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100 |
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101 if not_already simple-cross-compiler |
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102 then |
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103 # If we need to build cross compiler, assume root filesystem is stale. |
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104 |
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105 zap simple-root-filesystem linux-kernel |
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106 |
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107 time ./simple-cross-compiler.sh "$ARCH" || exit 1 |
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108 fi |
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109 |
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110 # Optionally, we can build a more capable statically linked compiler via |
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111 # canadian cross. (It's more powerful than we need here, but if you're going |
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112 # to use the cross compiler in other contexts this is probably what you want.) |
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113 |
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114 if [ ! -z "$CROSS_COMPILER_HOST" ] && not_already cross-compiler |
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115 then |
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116 zap simple-root-filesystem linux-kernel |
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117 |
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118 # Build the host compiler if necessary |
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119 |
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120 if ARCH="$CROSS_COMPILER_HOST" not_already simple-cross-compiler |
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121 then |
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122 time ./simple-cross-compiler.sh "$CROSS_COMPILER_HOST" || exit 1 |
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123 fi |
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124 |
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126 fi |
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127 |
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128 # Build the basic root filesystem. |
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129 |
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130 if not_already simple-root-filesystem |
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131 then |
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132 # If we need to build root filesystem, assume root-filesystem and |
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133 # root-image are stale. |
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134 |
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135 zap root-filesystem root-image |
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136 |
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137 time ./simple-root-filesystem.sh "$ARCH" || exit 1 |
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138 |
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139 fi |
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140 |
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141 # Build a native compiler. It's statically linked by default so it can |
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142 # run on an arbitrary host system. |
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143 |
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144 if not_already native-compiler && [ -z "$NO_NATIVE_COMPILER" ] |
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145 then |
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146 zap root-filesystem root-image |
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147 |
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148 time ./native-compiler.sh "$ARCH" || exit 1 |
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149 fi |
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150 |
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151 # Install the native compiler into the root filesystem, if necessary. |
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152 |
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153 if not_already root-filesystem && [ -z "$NO_NATIVE_COMPILER" ] |
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154 then |
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155 zap root-image |
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156 |
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157 time ./root-filesystem.sh "$ARCH" || exit 1 |
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158 fi |
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159 |
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160 # Create filesystem image from [simple-]root-filesystem directory |
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161 |
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162 if not_already root-image |
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163 then |
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164 zap system-image |
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165 [ "$SYSIMAGE_TYPE" == initramfs ] && zap linux-kernel |
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166 |
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167 time ./root-image.sh "$ARCH" || exit 1 |
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168 fi |
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169 |
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170 # Build a kernel. (Possibly includes cpio file for initramfs image type.) |
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171 |
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172 if not_already linux-kernel |
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173 then |
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174 zap system-image |
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175 |
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176 time ./linux-kernel.sh "$ARCH" || exit 1 |
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177 fi |
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178 |
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179 # Package it all up into something qemu can boot. |
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180 |
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Teach build.sh not to rebuild static compilers if they're already there.
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181 if not_already system-image |
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182 then |
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183 time ./system-image.sh $1 || exit 1 |
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184 fi |