1 #!/usr/bin/env bash
2 # Copyright 2015 The Go Authors. All rights reserved.
3 # Use of this source code is governed by a BSD-style
4 # license that can be found in the LICENSE file.
5 6 # When run as (for example)
7 #
8 # GOOS=linux GOARCH=ppc64 bootstrap.bash
9 #
10 # this script cross-compiles a toolchain for that GOOS/GOARCH
11 # combination, leaving the resulting tree in ../../go-${GOOS}-${GOARCH}-bootstrap.
12 # That tree can be copied to a machine of the given target type
13 # and used as $GOROOT_BOOTSTRAP to bootstrap a local build.
14 #
15 # Only changes that have been committed to Git (at least locally,
16 # not necessary reviewed and submitted to master) are included in the tree.
17 #
18 # See also golang.org/x/build/cmd/genbootstrap, which is used
19 # to generate bootstrap tgz files for builders.
20 21 set -e
22 23 if [ "$GOOS" = "" -o "$GOARCH" = "" ]; then
24 echo "usage: GOOS=os GOARCH=arch ./bootstrap.bash [-force]" >&2
25 exit 2
26 fi
27 28 forceflag=""
29 if [ "$1" = "-force" ]; then
30 forceflag=-force
31 shift
32 fi
33 34 targ="../../go-${GOOS}-${GOARCH}-bootstrap"
35 if [ -e $targ ]; then
36 echo "$targ already exists; remove before continuing"
37 exit 2
38 fi
39 40 unset GOROOT
41 src=$(cd .. && pwd)
42 echo "#### Copying to $targ"
43 cp -Rp "$src" "$targ"
44 cd "$targ"
45 echo
46 echo "#### Cleaning $targ"
47 chmod -R +w .
48 rm -f .gitignore
49 if [ -e .git ]; then
50 git clean -f -d
51 fi
52 echo
53 echo "#### Building $targ"
54 echo
55 cd src
56 ./make.bash --no-banner $forceflag
57 gohostos="$(../bin/go env GOHOSTOS)"
58 gohostarch="$(../bin/go env GOHOSTARCH)"
59 goos="$(../bin/go env GOOS)"
60 goarch="$(../bin/go env GOARCH)"
61 62 # NOTE: Cannot invoke go command after this point.
63 # We're about to delete all but the cross-compiled binaries.
64 cd ..
65 if [ "$goos" = "$gohostos" -a "$goarch" = "$gohostarch" ]; then
66 # cross-compile for local system. nothing to copy.
67 # useful if you've bootstrapped yourself but want to
68 # prepare a clean toolchain for others.
69 true
70 else
71 rm -f bin/go_${goos}_${goarch}_exec
72 mv bin/*_*/* bin
73 rmdir bin/*_*
74 rm -rf "pkg/${gohostos}_${gohostarch}" "pkg/tool/${gohostos}_${gohostarch}"
75 fi
76 77 rm -rf pkg/bootstrap pkg/obj .git
78 79 echo ----
80 echo Bootstrap toolchain for "$GOOS/$GOARCH" installed in "$(pwd)".
81 echo Building tbz.
82 cd ..
83 tar cf - "go-${GOOS}-${GOARCH}-bootstrap" | bzip2 -9 >"go-${GOOS}-${GOARCH}-bootstrap.tbz"
84 ls -l "$(pwd)/go-${GOOS}-${GOARCH}-bootstrap.tbz"
85 exit 0
86