Mercurial > hg > aboriginal
annotate host-tools.sh @ 898:db0f536aee7c
Fix hw-target builds so prerequisites build if they don't already exist.
author | Rob Landley <rob@landley.net> |
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date | Sun, 22 Nov 2009 03:56:04 -0600 |
parents | 850da666acc6 |
children | 726cac165450 |
rev | line source |
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177 | 1 #!/bin/bash |
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Break out the qemu build (and squashfs) into something easy to comment out,
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2 |
888 | 3 # Set up a known host environment, providing known versions all required |
4 # prerequisites, built from source. | |
5 | |
6 # This script serves a similar purpose to the temporary chroot system in | |
7 # Linux From Scratch chapter 5, isolating the new build from the host system | |
8 # so information from the host doesn't accidentally leak into the target. | |
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9 |
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10 # This script populates a build/host directory with busybox and symlinks to |
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11 # the host's toolchain, then adds the other packages (genext2fs, e2fsprogs, |
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12 # squashfs-tools, distcc, and qemu) that might be needed to package and run |
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13 # a system image. This lets the rest of the build run with the $PATH pointing |
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14 # at the new build/host directory and nothing else. |
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15 |
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16 # The tools provided by this stage are as similar as possible to the ones |
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17 # provided in the final system image. The fact the system can build under |
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18 # these tools is a good indication that it should be able to rebuild itself |
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19 # under itself. |
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20 |
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21 # This script is optional. The build runs fine without it, assuming the |
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22 # host has all the necessary packages installed and doesn't have any extra |
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23 # packages (such as libtool, pkg-config, python...) that might provide |
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24 # false information to autoconf or attach themselves as dependencies to |
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25 # the newly generated programs. (In practice, this can be quite fiddly.) |
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26 |
669 | 27 source sources/include.sh || exit 1 |
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28 |
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Move color selection into ./config. (The default colors don't look great on a white background.)
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29 echo -e "$HOST_COLOR" |
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30 echo "=== Building $STAGE_NAME" |
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31 |
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32 STAGE_DIR="${HOSTTOOLS}" |
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33 |
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Extended setupfor/cleanup to create binary package tarballs if the configure option BINARY_PACKAGE_TARBALLS is set. These tarballs extract into the current directory and add all the changed files installed by this package build, so you can pick and choose when assembling your own filesystem.
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34 # Blank $WORK but accept $STAGE_DIR if it exists. Re-running this script |
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35 # should be a NOP. |
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36 |
744
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Refactor so include.sh mostly just sets environment variables. Move read_arch_dir to function and call it explicitly (no more need for $NO_ARCH). Make blank_tempdir a function, called explicitly by stages when needed, with some sanity checks. Insert prerequisite tests to later stages so they can detect failure early and provide an explicit erro rmessage, and have those tests happen before blanking $WORK dir, to preserve debugging info. Make buildall.sh depend on prerequisite tests rather than trying to avoid calling later stages (and thus do flow control from asynchronous context). Add FAIL_QUIET option so buildall.sh doesn't spam the log with the new prerequisite error messages.
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37 blank_tempdir "${WORK}" |
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38 mkdir -p "${STAGE_DIR}" || dienow |
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39 |
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40 # If we want to record the host command lines, so we know exactly what commands |
744
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Refactor so include.sh mostly just sets environment variables. Move read_arch_dir to function and call it explicitly (no more need for $NO_ARCH). Make blank_tempdir a function, called explicitly by stages when needed, with some sanity checks. Insert prerequisite tests to later stages so they can detect failure early and provide an explicit erro rmessage, and have those tests happen before blanking $WORK dir, to preserve debugging info. Make buildall.sh depend on prerequisite tests rather than trying to avoid calling later stages (and thus do flow control from asynchronous context). Add FAIL_QUIET option so buildall.sh doesn't spam the log with the new prerequisite error messages.
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41 # the build uses, set up a wrapper that does that. |
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42 |
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43 if [ ! -z "$RECORD_COMMANDS" ] |
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44 then |
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45 if [ ! -f "$WRAPDIR/wrappy" ] |
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46 then |
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47 echo setup wrapdir |
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48 |
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49 # Build the wrapper and install it into build/wrapdir/wrappy |
897
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50 blank_tempdir "$WRAPDIR" |
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51 $CC -Os "$SOURCES/toys/wrappy.c" -o "$WRAPDIR/wrappy" || dienow |
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52 |
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53 # Loop through each $PATH element and create a symlink to the wrapper with |
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54 # that name. |
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55 |
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56 for i in $(echo "$PATH" | sed 's/:/ /g') |
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57 do |
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58 for j in $(ls $i) |
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59 do |
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60 [ -f "$WRAPDIR/$j" ] || ln -s wrappy "$WRAPDIR/$j" |
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61 done |
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62 done |
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63 |
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64 # Adjust things to use wrapper directory |
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65 |
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66 export WRAPPY_REALPATH="$PATH" |
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67 PATH="$WRAPDIR" |
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68 fi |
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69 |
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70 # If we're not recording the host command lines, then populate a directory |
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71 # with host versions of all the command line utilities we're going to install |
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72 # into root-filesystem. When we're done, PATH can be set to include just this |
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73 # directory and nothing else. |
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74 |
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75 # This serves three purposes: |
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76 # |
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77 # 1) Enumerate exactly what we need to build the system, so we can make sure |
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78 # root-filesystem has everything it needs to rebuild us. If anything is |
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79 # missing from this list, the resulting root-filesystem probably won't have |
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80 # it either, so it's nice to know as early as possible that we actually |
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81 # needed it. |
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82 # |
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83 # 2) Quick smoke test that the versions of the tools we're using can compile |
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84 # everything from source correctly, and thus root-filesystem should be able |
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85 # to rebuild from source using those same tools. |
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86 # |
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87 # 3) Reduce variation from distro to distro. The build always uses the |
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88 # same command line utilities no matter where we're running, because we |
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89 # provide our own. |
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90 |
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91 else |
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92 |
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93 # Use the new tools we build preferentially, as soon as they become |
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94 # available. |
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95 |
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96 PATH="$STAGE_DIR:$PATH" |
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97 |
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98 # Start by building busybox. We have no idea what strange things our host |
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99 # system has (or lacks, such as "which"), so throw busybox at it first |
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100 # thing. |
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101 |
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102 if [ ! -f "${STAGE_DIR}/busybox" ] |
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103 then |
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104 build_section busybox |
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105 fi |
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106 |
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107 # Create symlinks to the host toolchain. We need a usable existing host |
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108 # toolchain in order to build anything else (even a new host toolchain), |
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109 # and we don't really want to have to care what the host type is, so |
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110 # just use the toolchain that's already there. |
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111 |
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112 # This is a little more complicated than it needs to be, because the host |
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113 # toolchain may be using ccache and/or distcc, which means we need every |
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114 # instance of these tools that occurs in the $PATH, in order, each in its |
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115 # own fallback directory. |
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116 |
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117 for i in ar as nm cc make ld gcc |
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118 do |
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119 if [ ! -f "${STAGE_DIR}/$i" ] |
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120 then |
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121 # Loop through each instance, populating fallback directories. |
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122 |
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123 X=0 |
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124 FALLBACK="$STAGE_DIR" |
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125 PATH="$OLDPATH" "$STAGE_DIR/which" -a "$i" | while read j |
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126 do |
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127 mkdir -p "$FALLBACK" && |
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128 ln -sf "$j" "$FALLBACK/$i" || dienow |
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129 |
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130 X=$[$X+1] |
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131 FALLBACK="$STAGE_DIR/fallback-$X" |
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132 done |
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133 fi |
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134 done |
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135 |
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136 # We now have all the tools we need in $STAGE_DIR, so trim the $PATH to |
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137 # remove the old ones. |
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138 |
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139 PATH="$(hosttools_path)" |
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140 fi |
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141 |
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142 # This is optionally used by root-filesystem to accelerate native builds when |
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143 # running under qemu. It's not used to build root-filesystem, or to build |
311
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144 # the cross compiler, but it needs to be on the host system in order to |
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145 # use the distcc acceleration trick. |
301
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146 |
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147 # Note that this one we can use off of the host, it's used on the host where |
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148 # the system image runs. The build doesn't actually use it, we only bother |
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149 # to build it at all here as a convenience for run-from-build.sh. |
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150 |
318
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151 # Build distcc (if it's not in $PATH) |
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152 if [ -z "$(which distccd)" ] |
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153 then |
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154 setupfor distcc && |
624
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155 ./configure --with-included-popt --disable-Werror && |
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156 make -j "$CPUS" && |
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157 cp distcc distccd "${STAGE_DIR}" |
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158 |
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159 cleanup |
277
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160 fi |
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161 |
609
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And genext2fs could suffer the same symlink loop problem with RECORD_COMMANDS, so don't symlink. (The point of host-tools.sh is to build what we can from source anyway, linking to anything but the host toolchain defeats the purpose.)
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162 # Build genext2fs. We use it to build the ext2 image to boot qemu with |
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163 # in system-image.sh. |
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164 |
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165 if [ ! -f "${STAGE_DIR}"/genext2fs ] |
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166 then |
609
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167 setupfor genext2fs && |
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168 ./configure && |
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169 make -j $CPUS && |
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170 cp genext2fs "${STAGE_DIR}" |
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171 |
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172 cleanup |
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173 fi |
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174 |
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Since gene2fs can't produce large images in a reasonable amount of time, make a 64 meg image and resize it if necessary. (This means the minimum image size is 64 megs, because gene2fs won't run unless you specify a size, but it knows right away if the size you gave it wasn't big enough. I don't understand this either.)
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175 # Build e2fsprogs. |
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176 |
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177 # Busybox used to provide ext2 utilities (back around 1.2.2), but the |
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178 # implementation was horrible and got removed. Someday the new Lua |
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179 # toybox should provide these. |
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180 |
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181 # This mostly isn't used creating a system image, which uses genext2fs instead. |
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182 # If SYSIMAGE_HDA_MEGS is > 64, it'll resize2fs because genext2fs is |
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183 # unreasonably slow at creating large files. |
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184 |
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185 # The hdb.img of run-emulator.sh and run-from-build.sh uses e2fsprogs' |
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186 # fsck.ext2 and tune2fs. These are installed by default in most distros |
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187 # (which genext2fs isn't), and genext2fs doesn't have ext3 support anyway. |
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188 |
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189 if [ ! -f "${STAGE_DIR}"/mke2fs ] |
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190 then |
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191 setupfor e2fsprogs && |
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Vladimir Dronnikov pointed out that building e2fsprogs under uClibc would need --disable-tls.
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192 ./configure --disable-tls --enable-htree && |
642
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193 make -j "$CPUS" && |
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194 cp misc/{mke2fs,tune2fs} resize/resize2fs "${STAGE_DIR}" && |
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195 cp e2fsck/e2fsck "$STAGE_DIR"/fsck.ext2 |
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196 |
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197 cleanup |
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198 fi |
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199 |
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And genext2fs could suffer the same symlink loop problem with RECORD_COMMANDS, so don't symlink. (The point of host-tools.sh is to build what we can from source anyway, linking to anything but the host toolchain defeats the purpose.)
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200 # Squashfs is an alternate packaging option. |
301
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201 |
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202 if [ ! -f "${STAGE_DIR}"/mksquashfs ] |
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203 then |
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204 setupfor squashfs && |
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205 cd squashfs-tools && |
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206 make -j $CPUS && |
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207 cp mksquashfs unsquashfs "${STAGE_DIR}" |
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208 |
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209 cleanup |
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210 fi |
108
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211 |
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212 if [ ! -z "$RECORD_COMMANDS" ] |
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213 then |
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Minor cosmetic cleanup (don't warn about re-linking things that are expected to already be there), and don't build distccd if it's already in $PATH. (We need to put genext2fs in host/path because system-image.sh isn't using host's $PATH, but run-from-build.sh and friends do use host $PATH.)
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214 # Make sure the host tools we just built are also in wrapdir |
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215 for j in $(ls "$STAGE_DIR") |
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216 do |
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217 [ -e "$BUILD/wrapdir/$j" ] || ln -s wrappy "$BUILD/wrapdir/$j" |
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218 done |
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219 fi |
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220 |
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221 echo -e "\e[32mHost tools build complete.\e[0m" |