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# GOROOT_FINAL: The expected final Go root, baked into binaries.
11# The default is the location of the Go tree during the build.
12#
13# GOHOSTARCH: The architecture for host tools (compilers and
14# binaries). Binaries of this type must be executable on the current
15# system, so the only common reason to set this is to set
16# GOHOSTARCH=386 on an amd64 machine.
17#
18# GOARCH: The target architecture for installed packages and tools.
19#
20# GOOS: The target operating system for installed packages and tools.
21#
22# GO_GCFLAGS: Additional go tool compile arguments to use when
23# building the packages and commands.
24#
25# GO_LDFLAGS: Additional go tool link arguments to use when
26# building the commands.
27#
28# CGO_ENABLED: Controls cgo usage during the build. Set it to 1
29# to include all cgo related files, .c and .go file with "cgo"
30# build directive, in the build. Set it to 0 to ignore them.
31#
32# GO_EXTLINK_ENABLED: Set to 1 to invoke the host linker when building
33# packages that use cgo. Set to 0 to do all linking internally. This
34# controls the default behavior of the linker's -linkmode option. The
35# default value depends on the system.
36#
37# GO_LDSO: Sets the default dynamic linker/loader (ld.so) to be used
38# by the internal linker.
39#
40# CC: Command line to run to compile C code for GOHOSTARCH.
41# Default is "gcc". Also supported: "clang".
42#
43# CC_FOR_TARGET: Command line to run to compile C code for GOARCH.
44# This is used by cgo. Default is CC.
45#
46# CC_FOR_${GOOS}_${GOARCH}: Command line to run to compile C code for specified ${GOOS} and ${GOARCH}.
47# (for example, CC_FOR_linux_arm)
48# If this is not set, the build will use CC_FOR_TARGET if appropriate, or CC.
49#
50# CXX_FOR_TARGET: Command line to run to compile C++ code for GOARCH.
51# This is used by cgo. Default is CXX, or, if that is not set,
52# "g++" or "clang++".
53#
54# CXX_FOR_${GOOS}_${GOARCH}: Command line to run to compile C++ code for specified ${GOOS} and ${GOARCH}.
55# (for example, CXX_FOR_linux_arm)
56# If this is not set, the build will use CXX_FOR_TARGET if appropriate, or CXX.
57#
58# FC: Command line to run to compile Fortran code for GOARCH.
59# This is used by cgo. Default is "gfortran".
60#
61# PKG_CONFIG: Path to pkg-config tool. Default is "pkg-config".
62#
63# GO_DISTFLAGS: extra flags to provide to "dist bootstrap".
64# (Or just pass them to the make.bash command line.)
65#
66# GOBUILDTIMELOGFILE: If set, make.bash and all.bash write
67# timing information to this file. Useful for profiling where the
68# time goes when these scripts run.
69#
70# GOROOT_BOOTSTRAP: A working Go tree >= Go 1.4 for bootstrap.
71# If $GOROOT_BOOTSTRAP/bin/go is missing, $(go env GOROOT) is
72# tried for all "go" in $PATH. $HOME/go1.4 by default.
73
74set -e
75
76if [ ! -f run.bash ]; then
77 echo 'make.bash must be run from $GOROOT/src' 1>&2
78 exit 1
79fi
80
81if [ "$GOBUILDTIMELOGFILE" != "" ]; then
82 echo $(LC_TIME=C date) start make.bash >"$GOBUILDTIMELOGFILE"
83fi
84
85# Test for Windows.
86case "$(uname)" in
87*MINGW* | *WIN32* | *CYGWIN*)
88 echo 'ERROR: Do not use make.bash to build on Windows.'
89 echo 'Use make.bat instead.'
90 echo
91 exit 1
92 ;;
93esac
94
95# Test for bad ld.
96if ld --version 2>&1 | grep 'gold.* 2\.20' >/dev/null; then
97 echo 'ERROR: Your system has gold 2.20 installed.'
98 echo 'This version is shipped by Ubuntu even though'
99 echo 'it is known not to work on Ubuntu.'
100 echo 'Binaries built with this linker are likely to fail in mysterious ways.'
101 echo
102 echo 'Run sudo apt-get remove binutils-gold.'
103 echo
104 exit 1
105fi
106
107# Test for bad SELinux.
108# On Fedora 16 the selinux filesystem is mounted at /sys/fs/selinux,
109# so loop through the possible selinux mount points.
110for se_mount in /selinux /sys/fs/selinux
111do
112 if [ -d $se_mount -a -f $se_mount/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
113 if ! cat $se_mount/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then
114 echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
115 echo "Go. You can enable the features that Go needs via the following "
116 echo "command (as root):"
117 echo " # setsebool -P allow_execstack 1"
118 echo
119 echo "Note that this affects your system globally! "
120 echo
121 echo "The build will continue in five seconds in case we "
122 echo "misdiagnosed the issue..."
123
124 sleep 5
125 fi
126 fi
127done
128
129# Test for debian/kFreeBSD.
130# cmd/dist will detect kFreeBSD as freebsd/$GOARCH, but we need to
131# disable cgo manually.
132if [ "$(uname -s)" = "GNU/kFreeBSD" ]; then
133 export CGO_ENABLED=0
134fi
135
136# Test which linker/loader our system is using, if GO_LDSO is not set.
137if [ -z "$GO_LDSO" ] && type readelf >/dev/null 2>&1; then
138 if echo "int main() { return 0; }" | ${CC:-cc} -o ./test-musl-ldso -x c - >/dev/null 2>&1; then
139 LDSO=$(readelf -l ./test-musl-ldso | grep 'interpreter:' | sed -e 's/^.*interpreter: \(.*\)[]]/\1/') >/dev/null 2>&1
140 [ -z "$LDSO" ] || export GO_LDSO="$LDSO"
141 rm -f ./test-musl-ldso
142 fi
143fi
144
145# Clean old generated file that will cause problems in the build.
146rm -f ./runtime/runtime_defs.go
147
148# Finally! Run the build.
149
150verbose=false
151vflag=""
152if [ "$1" = "-v" ]; then
153 verbose=true
154 vflag=-v
155 shift
156fi
157
158goroot_bootstrap_set=${GOROOT_BOOTSTRAP+"true"}
159if [ -z "$GOROOT_BOOTSTRAP" ]; then
160 GOROOT_BOOTSTRAP="$HOME/go1.4"
161 for d in sdk/go1.17 go1.17; do
162 if [ -d "$HOME/$d" ]; then
163 GOROOT_BOOTSTRAP="$HOME/$d"
164 fi
165 done
166fi
167export GOROOT_BOOTSTRAP
168
169export GOROOT="$(cd .. && pwd)"
170IFS=$'\n'; for go_exe in $(type -ap go); do
171 if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
172 goroot=$(GOROOT='' GOOS='' GOARCH='' "$go_exe" env GOROOT)
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 $GOROOT_BOOTSTRAP/bin/go." >&2
184 echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
185 exit 1
186fi
187# Get the exact bootstrap toolchain version to help with debugging.
188# We clear GOOS and GOARCH to avoid an ominous but harmless warning if
189# the bootstrap doesn't support them.
190GOROOT_BOOTSTRAP_VERSION=$(GOOS= GOARCH= GOEXPERIMENT= $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" = "$GOROOT" ]; then
196 echo "ERROR: \$GOROOT_BOOTSTRAP must not be set to \$GOROOT" >&2
197 echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
198 exit 1
199fi
200rm -f cmd/dist/dist
201GOROOT="$GOROOT_BOOTSTRAP" GOOS="" GOARCH="" GO111MODULE=off GOEXPERIMENT="" GOENV=off GOFLAGS="" "$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 Go 1.4, 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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