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.
6 # When run as (for example)
8 # GOOS=linux GOARCH=ppc64 bootstrap.bash
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 $GOROOT_BOOTSTRAP to bootstrap a local build.
15 # Only changes that have been committed to Git (at least locally,
16 # not necessary reviewed and submitted to master) are included in the tree.
20 if [ "$GOOS" = "" -o "$GOARCH" = "" ]; then
21 echo "usage: GOOS=os GOARCH=arch ./bootstrap.bash" >&2
25 targ="../../go-${GOOS}-${GOARCH}-bootstrap"
27 echo "$targ already exists; remove before continuing"
33 echo "#### Copying to $targ"
37 echo "#### Cleaning $targ"
41 echo "#### Building $targ"
44 ./make.bash --no-banner
45 gohostos="$(../bin/go env GOHOSTOS)"
46 gohostarch="$(../bin/go env GOHOSTARCH)"
47 goos="$(../bin/go env GOOS)"
48 goarch="$(../bin/go env GOARCH)"
50 # NOTE: Cannot invoke go command after this point.
51 # We're about to delete all but the cross-compiled binaries.
53 if [ "$goos" = "$gohostos" -a "$goarch" = "$gohostarch" ]; then
54 # cross-compile for local system. nothing to copy.
55 # useful if you've bootstrapped yourself but want to
56 # prepare a clean toolchain for others.
61 rm -rf "pkg/${gohostos}_${gohostarch}" "pkg/tool/${gohostos}_${gohostarch}"
63 rm -rf pkg/bootstrap pkg/obj .git
66 echo Bootstrap toolchain for "$GOOS/$GOARCH" installed in "$(pwd)".
69 tar cf - "go-${GOOS}-${GOARCH}-bootstrap" | bzip2 -9 >"go-${GOOS}-${GOARCH}-bootstrap.tbz"
70 ls -l "$(pwd)/go-${GOOS}-${GOARCH}-bootstrap.tbz"