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annotate build.sh @ 1740:258427b0c8be draft

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Add more/tweak.sh to rebuild a package in a stage. ex: more/tweak.sh i686 native-compiler build_section ccwrap
author Rob Landley <rob@landley.net>
date Sat, 21 Feb 2015 16:34:42 -0600
parents 4ca4ddd185db
children 10b64f52ad20
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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137ba51ee993 Delete output directories on re-run, teach build to log and build multiple
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1 #!/bin/bash
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2
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3 # Run all the steps needed to build a system image from scratch.
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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, root-filesystem,
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7 # native-compiler, system-image.
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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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14 # The optional cross-compiler stage (after simple-cross-compiler but before
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15 # root-filesystem) creates a more powerful and portable cross compiler
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16 # that can be used to cross compile more stuff (if you're into that sort of
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17 # thing). To enable that:
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18
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19 # CROSS_COMPILER_HOST=i686 ./build.sh $TARGET
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20
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21 # Where "i686" is whichever target you want the new cross compiler to run on.
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22
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23 # The simplest set of stages (if you run them yourself) is:
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24 # download, simple-cross-compiler, root-filesystem, system-image.
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25
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26 # If this script was run with no arguments, list available architectures
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27
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28 [ ! -z "$2" ] && REBUILD="$2" &&
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29 [ ! -e "$2".sh ] && echo "no stage $2" && exit 1
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30
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31 if [ $# -lt 1 ] || [ $# -gt 2 ] || [ ! -e sources/targets/"$1" ]
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32 then
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33 echo
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34 echo "Usage: $0 TARGET [REBUILD_FROM_STAGE]"
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35 echo
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36 echo "Supported architectures:"
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37 ls sources/targets
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38 echo
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39 echo "Build stages:"
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40 sed -n 's/#.*//;s@.*[.]/\([^.]*\)[.]sh.*@\1@p' "$0" | uniq | xargs echo
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41 echo
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43 exit 1
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44 fi
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45 ARCH="$1"
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46
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47 # Use environment variables persistently set in the config file.
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48
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49 [ -e config ] && source config
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51 # Allow the output directory to be overridden. This hasn't been tested in
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52 # forever and probably doesn't work.
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53
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54 [ -z "$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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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.gz" ]
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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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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.gz"
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80 done
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81 }
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82
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83 do_stage()
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84 {
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85 STAGE="$1"
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86 shift
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87
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88 if [ "$AFTER" == "$STAGE" ]
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89 then
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90 unset AFTER
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91 else
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92 time ./"$STAGE".sh "$@" || exit 1
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93 fi
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94 }
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95
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96 # The first two stages (download.sh and host-tools.sh) are architecture
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97 # independent. In order to allow multiple builds in parallel, re-running
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98 # them after they've already completed must be a safe NOP.
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99
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100 # Download source code.
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101
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102 do_stage download
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103
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104 # Build host tools. This populates a single directory with every command the
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105 # build needs, so we can ditch the host's $PATH afterwards.
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106
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107 if [ -z "$NO_HOST_TOOLS" ]
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108 then
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109 do_stage host-tools
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110 fi
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111
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112 # Do we need to build the simple cross compiler?
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113
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114 if not_already simple-cross-compiler
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115 then
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116 # If we need to build cross compiler, assume root filesystem is stale.
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117
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118 zap root-filesystem cross-compiler native-compiler linux-kernel
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119
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120 do_stage simple-cross-compiler "$ARCH"
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121 fi
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122
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123 # Optionally, we can build a more capable statically linked compiler via
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124 # canadian cross. (It's more powerful than we need here, but if you're going
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125 # to use the cross compiler in other contexts this is probably what you want.)
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126
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127 if [ ! -z "$CROSS_COMPILER_HOST" ] && not_already cross-compiler
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128 then
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129 zap root-filesystem native-compiler linux-kernel
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130
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131 # Build the host compiler if necessary
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132
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133 if ARCH="$CROSS_COMPILER_HOST" not_already simple-cross-compiler
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134 then
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135 do_stage simple-cross-compiler "$CROSS_COMPILER_HOST"
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136 fi
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137
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138 do_stage cross-compiler "$ARCH"
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139 fi
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140
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141 # Build the basic root filesystem.
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142
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143 if not_already root-filesystem
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144 then
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145 zap system-image
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146 [ "$SYSIMAGE_TYPE" == rootfs ] && zap linux-kernel
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147
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148 do_stage root-filesystem "$ARCH"
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149 fi
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150
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151 # Build a native compiler. It's statically linked by default so it can
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152 # run on an arbitrary host system.
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153
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154 if not_already native-compiler
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155 then
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156 zap system-image
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157
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158 do_stage native-compiler "$ARCH"
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159 fi
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160
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161 # Package it all up into something qemu can boot.
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162
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163 if not_already system-image
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164 then
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165 do_stage system-image "$ARCH"
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166 fi