Text file
src/make.bash
Documentation: Index
1#!/usr/bin/env bash
2# Copyright 2009 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# See golang.org/s/go15bootstrap for an overview of the build process.
7
8# Environment variables that control make.bash:
9#
10# GOHOSTARCH: The architecture for host tools (compilers and
11# binaries). Binaries of this type must be executable on the current
12# system, so the only common reason to set this is to set
13# GOHOSTARCH=386 on an amd64 machine.
14#
15# GOARCH: The target architecture for installed packages and tools.
16#
17# GOOS: The target operating system for installed packages and tools.
18#
19# GO_GCFLAGS: Additional go tool compile arguments to use when
20# building the packages and commands.
21#
22# GO_LDFLAGS: Additional go tool link arguments to use when
23# building the commands.
24#
25# CGO_ENABLED: Controls cgo usage during the build. Set it to 1
26# to include all cgo related files, .c and .go file with "cgo"
27# build directive, in the build. Set it to 0 to ignore them.
28#
29# GO_EXTLINK_ENABLED: Set to 1 to invoke the host linker when building
30# packages that use cgo. Set to 0 to do all linking internally. This
31# controls the default behavior of the linker's -linkmode option. The
32# default value depends on the system.
33#
34# GO_LDSO: Sets the default dynamic linker/loader (ld.so) to be used
35# by the internal linker.
36#
37# CC: Command line to run to compile C code for GOHOSTARCH.
38# Default is "gcc". Also supported: "clang".
39#
40# CC_FOR_TARGET: Command line to run to compile C code for GOARCH.
41# This is used by cgo. Default is CC.
42#
43# CC_FOR_${GOOS}_${GOARCH}: Command line to run to compile C code for specified ${GOOS} and ${GOARCH}.
44# (for example, CC_FOR_linux_arm)
45# If this is not set, the build will use CC_FOR_TARGET if appropriate, or CC.
46#
47# CXX_FOR_TARGET: Command line to run to compile C++ code for GOARCH.
48# This is used by cgo. Default is CXX, or, if that is not set,
49# "g++" or "clang++".
50#
51# CXX_FOR_${GOOS}_${GOARCH}: Command line to run to compile C++ code for specified ${GOOS} and ${GOARCH}.
52# (for example, CXX_FOR_linux_arm)
53# If this is not set, the build will use CXX_FOR_TARGET if appropriate, or CXX.
54#
55# FC: Command line to run to compile Fortran code for GOARCH.
56# This is used by cgo. Default is "gfortran".
57#
58# PKG_CONFIG: Path to pkg-config tool. Default is "pkg-config".
59#
60# GO_DISTFLAGS: extra flags to provide to "dist bootstrap".
61# (Or just pass them to the make.bash command line.)
62#
63# GOBUILDTIMELOGFILE: If set, make.bash and all.bash write
64# timing information to this file. Useful for profiling where the
65# time goes when these scripts run.
66#
67# GOROOT_BOOTSTRAP: A working Go tree >= Go 1.20.6 for bootstrap.
68# If $GOROOT_BOOTSTRAP/bin/go is missing, $(go env GOROOT) is
69# tried for all "go" in $PATH. By default, one of $HOME/go1.20.6,
70# $HOME/sdk/go1.20.6, or $HOME/go1.4, whichever exists, in that order.
71# We still check $HOME/go1.4 to allow for build scripts that still hard-code
72# that name even though they put newer Go toolchains there.
73
74bootgo=1.20.6
75
76set -e
77
78if [[ ! -f run.bash ]]; then
79 echo 'make.bash must be run from $GOROOT/src' 1>&2
80 exit 1
81fi
82
83if [[ "$GOBUILDTIMELOGFILE" != "" ]]; then
84 echo $(LC_TIME=C date) start make.bash >"$GOBUILDTIMELOGFILE"
85fi
86
87# Test for Windows.
88case "$(uname)" in
89*MINGW* | *WIN32* | *CYGWIN*)
90 echo 'ERROR: Do not use make.bash to build on Windows.'
91 echo 'Use make.bat instead.'
92 echo
93 exit 1
94 ;;
95esac
96
97# Test for bad ld.
98if ld --version 2>&1 | grep 'gold.* 2\.20' >/dev/null; then
99 echo 'ERROR: Your system has gold 2.20 installed.'
100 echo 'This version is shipped by Ubuntu even though'
101 echo 'it is known not to work on Ubuntu.'
102 echo 'Binaries built with this linker are likely to fail in mysterious ways.'
103 echo
104 echo 'Run sudo apt-get remove binutils-gold.'
105 echo
106 exit 1
107fi
108
109# Test for bad SELinux.
110# On Fedora 16 the selinux filesystem is mounted at /sys/fs/selinux,
111# so loop through the possible selinux mount points.
112for se_mount in /selinux /sys/fs/selinux
113do
114 if [[ -d $se_mount && -f $se_mount/booleans/allow_execstack && -x /usr/sbin/selinuxenabled ]] && /usr/sbin/selinuxenabled; then
115 if ! cat $se_mount/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then
116 echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
117 echo "Go. You can enable the features that Go needs via the following "
118 echo "command (as root):"
119 echo " # setsebool -P allow_execstack 1"
120 echo
121 echo "Note that this affects your system globally! "
122 echo
123 echo "The build will continue in five seconds in case we "
124 echo "misdiagnosed the issue..."
125
126 sleep 5
127 fi
128 fi
129done
130
131# Test for debian/kFreeBSD.
132# cmd/dist will detect kFreeBSD as freebsd/$GOARCH, but we need to
133# disable cgo manually.
134if [[ "$(uname -s)" == "GNU/kFreeBSD" ]]; then
135 export CGO_ENABLED=0
136fi
137
138# Clean old generated file that will cause problems in the build.
139rm -f ./runtime/runtime_defs.go
140
141# Finally! Run the build.
142
143verbose=false
144vflag=""
145if [[ "$1" == "-v" ]]; then
146 verbose=true
147 vflag=-v
148 shift
149fi
150
151goroot_bootstrap_set=${GOROOT_BOOTSTRAP+"true"}
152if [[ -z "$GOROOT_BOOTSTRAP" ]]; then
153 GOROOT_BOOTSTRAP="$HOME/go1.4"
154 for d in sdk/go$bootgo go$bootgo; do
155 if [[ -d "$HOME/$d" ]]; then
156 GOROOT_BOOTSTRAP="$HOME/$d"
157 fi
158 done
159fi
160export GOROOT_BOOTSTRAP
161
162bootstrapenv() {
163 GOROOT="$GOROOT_BOOTSTRAP" GO111MODULE=off GOENV=off GOOS= GOARCH= GOEXPERIMENT= GOFLAGS= "$@"
164}
165
166export GOROOT="$(cd .. && pwd)"
167IFS=$'\n'; for go_exe in $(type -ap go); do
168 if [[ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]]; then
169 goroot_bootstrap=$GOROOT_BOOTSTRAP
170 GOROOT_BOOTSTRAP=""
171 goroot=$(bootstrapenv "$go_exe" env GOROOT)
172 GOROOT_BOOTSTRAP=$goroot_bootstrap
173 if [[ "$goroot" != "$GOROOT" ]]; then
174 if [[ "$goroot_bootstrap_set" == "true" ]]; then
175 printf 'WARNING: %s does not exist, found %s from env\n' "$GOROOT_BOOTSTRAP/bin/go" "$go_exe" >&2
176 printf 'WARNING: set %s as GOROOT_BOOTSTRAP\n' "$goroot" >&2
177 fi
178 GOROOT_BOOTSTRAP="$goroot"
179 fi
180 fi
181done; unset IFS
182if [[ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]]; then
183 echo "ERROR: Cannot find $GOROOT_BOOTSTRAP/bin/go." >&2
184 echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go $bootgo." >&2
185 exit 1
186fi
187# Get the exact bootstrap toolchain version to help with debugging.
188# We clear GOOS and GOARCH to avoid an ominous but harmless warning if
189# the bootstrap doesn't support them.
190GOROOT_BOOTSTRAP_VERSION=$(bootstrapenv "$GOROOT_BOOTSTRAP/bin/go" version | sed 's/go version //')
191echo "Building Go cmd/dist using $GOROOT_BOOTSTRAP. ($GOROOT_BOOTSTRAP_VERSION)"
192if $verbose; then
193 echo cmd/dist
194fi
195if [[ "$GOROOT_BOOTSTRAP" == "$GOROOT" ]]; then
196 echo "ERROR: \$GOROOT_BOOTSTRAP must not be set to \$GOROOT" >&2
197 echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go $bootgo." >&2
198 exit 1
199fi
200rm -f cmd/dist/dist
201bootstrapenv "$GOROOT_BOOTSTRAP/bin/go" build -o cmd/dist/dist ./cmd/dist
202
203# -e doesn't propagate out of eval, so check success by hand.
204eval $(./cmd/dist/dist env -p || echo FAIL=true)
205if [[ "$FAIL" == true ]]; then
206 exit 1
207fi
208
209if $verbose; then
210 echo
211fi
212
213if [[ "$1" == "--dist-tool" ]]; then
214 # Stop after building dist tool.
215 mkdir -p "$GOTOOLDIR"
216 if [[ "$2" != "" ]]; then
217 cp cmd/dist/dist "$2"
218 fi
219 mv cmd/dist/dist "$GOTOOLDIR"/dist
220 exit 0
221fi
222
223# Run dist bootstrap to complete make.bash.
224# Bootstrap installs a proper cmd/dist, built with the new toolchain.
225# Throw ours, built with the bootstrap toolchain, away after bootstrap.
226./cmd/dist/dist bootstrap -a $vflag $GO_DISTFLAGS "$@"
227rm -f ./cmd/dist/dist
228
229# DO NOT ADD ANY NEW CODE HERE.
230# The bootstrap+rm above are the final step of make.bash.
231# If something must be added, add it to cmd/dist's cmdbootstrap,
232# to avoid needing three copies in three different shell languages
233# (make.bash, make.bat, make.rc).
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