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).
234