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annotate build.sh @ 941:7dd3fb4dd333

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Minor cleanups and comments, introduce check_prerequisite function.
author Rob Landley <rob@landley.net>
date Tue, 22 Dec 2009 11:51:52 -0600
parents a541c5a96ff3
children fc134a13357e
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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 # If run with no arguments, list architectures.
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7 if [ $# -ne 1 ]
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8 then
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9 echo "Usage: $0 ARCH"
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759adf5a0fe9 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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10 . sources/include.sh
759adf5a0fe9 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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11 read_arch_dir
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12 fi
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13 ARCH="$1"
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15 # Download source code and build host tools.
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17 time ./download.sh || exit 1
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19 # host-tools populates one directory with every command the build needs,
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20 # so we can ditch the old $PATH afterwards.
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21
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22 time ./host-tools.sh || exit 1
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24 # A function to skip stages that have already been done (because the
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25 # tarball they create is already there).
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27 not_already()
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28 {
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29 if [ -f "build/$1-$ARCH.tar.bz2" ]
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30 then
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31 echo "=== Skipping $1-$ARCH (already there)"
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32 return 1
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33 fi
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35 return 0
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36 }
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37
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38 # Do we need to build the simple cross compiler?
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40 # This version has no thread support, no libgcc_s.so, doesn't include
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41 # uClibc++, and is dynamically linked against the host's shared libraries.
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43 if not_already cross-compiler
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44 then
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45 # If we need to build cross compiler, assume root filesystem is stale.
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47 rm -rf "build/root-filesystem-$ARCH.tar.bz2"
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48 time ./cross-compiler.sh "$ARCH" || exit 1
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49 fi
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51 # Optionally, we can build a statically linked compiler via canadian cross.
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53 # We don't autodetect the host because i686 is more portable (running on
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54 # both 64 and 32 bit hosts), but x86_64 is (slightly) faster on a 64 bit host.
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56 if [ ! -z "$STATIC_CROSS_COMPILER_HOST" ] && not_already cross-static
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57 then
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59 # These are statically linked against uClibc on the host (for portability),
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60 # built --with-shared, and have uClibc++ installed.
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62 # To build each of these we need two existing cross compilers: one for
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63 # the host (to build the executables) and one for the target (to build
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64 # the libraries).
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65
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66 BUILD_STATIC=1 FROM_ARCH="$STATIC_CROSS_COMPILER_HOST" NATIVE_TOOLCHAIN=only \
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67 ROOT_NODIRS=1 STAGE_NAME=cross-static ./root-filesystem.sh "$ARCH" || exit 1
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68 fi
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70 # Optionally, we can build a static native compiler. (The one in
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71 # root-filesystem is dynamically linked against uClibc, this one can
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72 # presumably be untarred and run on any appropriate host system.)
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74 if [ ! -z "$BUILD_STATIC_NATIVE_COMPILER" ] && not_already native-compiler
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75 then
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77 # Build static native compilers for each target, possibly in parallel
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79 BUILD_STATIC=1 NATIVE_TOOLCHAIN=only STAGE_NAME=native-compiler \
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80 ./root-filesystem.sh "$ARCH"
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81 fi
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83 # Do we need to build the root filesystem?
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85 if not_already root-filesystem
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86 then
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88 # If we need to build root filesystem, assume system image is stale.
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90 rm -rf "build/system-image-$ARCH.tar.bz2"
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91 time ./root-filesystem.sh "$ARCH" || exit 1
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92 fi
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94 if not_already system-image
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95 then
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96 time ./system-image.sh $1 || exit 1
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97 fi
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98