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 $GOROOT_BOOTSTRAP to bootstrap a local build. 14 # 15 # Only changes that have been committed to Git (at least locally, 16 # not necessary reviewed and submitted to master) are included in the tree. 17 # 18 # As a special case for Go's internal use only, if the 19 # BOOTSTRAP_FORMAT environment variable is set to "mintgz", the 20 # resulting archive is intended for use by the Go build system and 21 # differs in that the mintgz file: 22 # * is a tar.gz file instead of bz2 23 # * has many unnecessary files deleted to reduce its size 24 # * does not have a shared directory component for each tar entry 25 # Do not depend on the mintgz format. 26 27 set -e 28 29 if [ "$GOOS" = "" -o "$GOARCH" = "" ]; then 30 echo "usage: GOOS=os GOARCH=arch ./bootstrap.bash" >&2 31 exit 2 32 fi 33 34 targ="../../go-${GOOS}-${GOARCH}-bootstrap" 35 if [ -e $targ ]; then 36 echo "$targ already exists; remove before continuing" 37 exit 2 38 fi 39 40 if [ "$BOOTSTRAP_FORMAT" != "mintgz" -a "$BOOTSTRAP_FORMAT" != "" ]; then 41 echo "unknown BOOTSTRAP_FORMAT format" 42 exit 2 43 fi 44 45 unset GOROOT 46 src=$(cd .. && pwd) 47 echo "#### Copying to $targ" 48 cp -R "$src" "$targ" 49 cd "$targ" 50 echo 51 echo "#### Cleaning $targ" 52 rm -f .gitignore 53 if [ -e .git ]; then 54 git clean -f -d 55 fi 56 echo 57 echo "#### Building $targ" 58 echo 59 cd src 60 ./make.bash --no-banner 61 gohostos="$(../bin/go env GOHOSTOS)" 62 gohostarch="$(../bin/go env GOHOSTARCH)" 63 goos="$(../bin/go env GOOS)" 64 goarch="$(../bin/go env GOARCH)" 65 66 # NOTE: Cannot invoke go command after this point. 67 # We're about to delete all but the cross-compiled binaries. 68 cd .. 69 if [ "$goos" = "$gohostos" -a "$goarch" = "$gohostarch" ]; then 70 # cross-compile for local system. nothing to copy. 71 # useful if you've bootstrapped yourself but want to 72 # prepare a clean toolchain for others. 73 true 74 else 75 mv bin/*_*/* bin 76 rmdir bin/*_* 77 rm -rf "pkg/${gohostos}_${gohostarch}" "pkg/tool/${gohostos}_${gohostarch}" 78 fi 79 80 if [ "$BOOTSTRAP_FORMAT" = "mintgz" ]; then 81 # Fetch git revision before rm -rf .git. 82 GITREV=$(git rev-parse --short HEAD) 83 fi 84 85 rm -rf pkg/bootstrap pkg/obj .git 86 87 # Support for building minimal tar.gz for the builders. 88 # The build system doesn't support bzip2, and by deleting more stuff, 89 # they start faster, especially on machines without fast filesystems 90 # and things like tmpfs configures. 91 # Do not depend on this format. It's for internal use only. 92 if [ "$BOOTSTRAP_FORMAT" = "mintgz" ]; then 93 OUTGZ="gobootstrap-${GOOS}-${GOARCH}-${GITREV}.tar.gz" 94 echo "Preparing to generate build system's ${OUTGZ}; cleaning ..." 95 rm -rf bin/gofmt 96 rm -rf src/runtime/race/race_*.syso 97 rm -rf api test doc misc/cgo/test misc/trace 98 rm -rf pkg/tool/*_*/{addr2line,api,cgo,cover,doc,fix,nm,objdump,pack,pprof,test2json,trace,vet} 99 rm -rf pkg/*_*/{image,database,cmd} 100 rm -rf $(find . -type d -name testdata) 101 find . -type f -name '*_test.go' -exec rm {} \; 102 # git clean doesn't clean symlinks apparently, and the buildlet 103 # rejects them, so: 104 find . -type l -exec rm {} \; 105 106 echo "Writing ${OUTGZ} ..." 107 tar cf - . | gzip -9 > ../$OUTGZ 108 cd .. 109 ls -l "$(pwd)/$OUTGZ" 110 exit 0 111 fi 112 113 echo ---- 114 echo Bootstrap toolchain for "$GOOS/$GOARCH" installed in "$(pwd)". 115 echo Building tbz. 116 cd .. 117 tar cf - "go-${GOOS}-${GOARCH}-bootstrap" | bzip2 -9 >"go-${GOOS}-${GOARCH}-bootstrap.tbz" 118 ls -l "$(pwd)/go-${GOOS}-${GOARCH}-bootstrap.tbz" 119 exit 0 120
