Text file
src/make.bash
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 # CXX_FOR_TARGET: Command line to run to compile C++ code for GOARCH.
47 # This is used by cgo. Default is CXX, or, if that is not set,
48 # "g++" or "clang++".
49 #
50 # FC: Command line to run to compile Fortran code for GOARCH.
51 # This is used by cgo. Default is "gfortran".
52 #
53 # PKG_CONFIG: Path to pkg-config tool. Default is "pkg-config".
54 #
55 # GO_DISTFLAGS: extra flags to provide to "dist bootstrap".
56 # (Or just pass them to the make.bash command line.)
57 #
58 # GOBUILDTIMELOGFILE: If set, make.bash and all.bash write
59 # timing information to this file. Useful for profiling where the
60 # time goes when these scripts run.
61 #
62 # GOROOT_BOOTSTRAP: A working Go tree >= Go 1.4 for bootstrap.
63 # If $GOROOT_BOOTSTRAP/bin/go is missing, $(go env GOROOT) is
64 # tried for all "go" in $PATH. $HOME/go1.4 by default.
65
66 set -e
67
68 export GOENV=off
69 unset GOBIN # Issue 14340
70 unset GOFLAGS
71 unset GO111MODULE
72
73 if [ ! -f run.bash ]; then
74 echo 'make.bash must be run from $GOROOT/src' 1>&2
75 exit 1
76 fi
77
78 if [ "$GOBUILDTIMELOGFILE" != "" ]; then
79 echo $(LC_TIME=C date) start make.bash >"$GOBUILDTIMELOGFILE"
80 fi
81
82 # Test for Windows.
83 case "$(uname)" in
84 *MINGW* | *WIN32* | *CYGWIN*)
85 echo 'ERROR: Do not use make.bash to build on Windows.'
86 echo 'Use make.bat instead.'
87 echo
88 exit 1
89 ;;
90 esac
91
92 # Test for bad ld.
93 if ld --version 2>&1 | grep 'gold.* 2\.20' >/dev/null; then
94 echo 'ERROR: Your system has gold 2.20 installed.'
95 echo 'This version is shipped by Ubuntu even though'
96 echo 'it is known not to work on Ubuntu.'
97 echo 'Binaries built with this linker are likely to fail in mysterious ways.'
98 echo
99 echo 'Run sudo apt-get remove binutils-gold.'
100 echo
101 exit 1
102 fi
103
104 # Test for bad SELinux.
105 # On Fedora 16 the selinux filesystem is mounted at /sys/fs/selinux,
106 # so loop through the possible selinux mount points.
107 for se_mount in /selinux /sys/fs/selinux
108 do
109 if [ -d $se_mount -a -f $se_mount/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
110 if ! cat $se_mount/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then
111 echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
112 echo "Go. You can enable the features that Go needs via the following "
113 echo "command (as root):"
114 echo " # setsebool -P allow_execstack 1"
115 echo
116 echo "Note that this affects your system globally! "
117 echo
118 echo "The build will continue in five seconds in case we "
119 echo "misdiagnosed the issue..."
120
121 sleep 5
122 fi
123 fi
124 done
125
126 # Test for debian/kFreeBSD.
127 # cmd/dist will detect kFreeBSD as freebsd/$GOARCH, but we need to
128 # disable cgo manually.
129 if [ "$(uname -s)" = "GNU/kFreeBSD" ]; then
130 export CGO_ENABLED=0
131 fi
132
133 # Test which linker/loader our system is using, if GO_LDSO is not set.
134 if [ -z "$GO_LDSO" ] && type readelf >/dev/null 2>&1; then
135 if echo "int main() { return 0; }" | ${CC:-cc} -o ./test-musl-ldso -x c - >/dev/null 2>&1; then
136 LDSO=$(readelf -l ./test-musl-ldso | grep 'interpreter:' | sed -e 's/^.*interpreter: \(.*\)[]]/\1/') >/dev/null 2>&1
137 [ -z "$LDSO" ] || export GO_LDSO="$LDSO"
138 rm -f ./test-musl-ldso
139 fi
140 fi
141
142 # Clean old generated file that will cause problems in the build.
143 rm -f ./runtime/runtime_defs.go
144
145 # Finally! Run the build.
146
147 verbose=false
148 vflag=""
149 if [ "$1" = "-v" ]; then
150 verbose=true
151 vflag=-v
152 shift
153 fi
154
155 export GOROOT_BOOTSTRAP=${GOROOT_BOOTSTRAP:-$HOME/go1.4}
156 export GOROOT="$(cd .. && pwd)"
157 IFS=$'\n'; for go_exe in $(type -ap go); do
158 if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
159 goroot=$(GOROOT='' GOOS='' GOARCH='' "$go_exe" env GOROOT)
160 if [ "$goroot" != "$GOROOT" ]; then
161 GOROOT_BOOTSTRAP=$goroot
162 fi
163 fi
164 done; unset IFS
165 if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
166 echo "ERROR: Cannot find $GOROOT_BOOTSTRAP/bin/go." >&2
167 echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
168 exit 1
169 fi
170 # Get the exact bootstrap toolchain version to help with debugging.
171 # We clear GOOS and GOARCH to avoid an ominous but harmless warning if
172 # the bootstrap doesn't support them.
173 GOROOT_BOOTSTRAP_VERSION=$(GOOS= GOARCH= $GOROOT_BOOTSTRAP/bin/go version | sed 's/go version //')
174 echo "Building Go cmd/dist using $GOROOT_BOOTSTRAP. ($GOROOT_BOOTSTRAP_VERSION)"
175 if $verbose; then
176 echo cmd/dist
177 fi
178 if [ "$GOROOT_BOOTSTRAP" = "$GOROOT" ]; then
179 echo "ERROR: \$GOROOT_BOOTSTRAP must not be set to \$GOROOT" >&2
180 echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
181 exit 1
182 fi
183 rm -f cmd/dist/dist
184 GOROOT="$GOROOT_BOOTSTRAP" GOOS="" GOARCH="" GO111MODULE=off "$GOROOT_BOOTSTRAP/bin/go" build -o cmd/dist/dist ./cmd/dist
185
186 # -e doesn't propagate out of eval, so check success by hand.
187 eval $(./cmd/dist/dist env -p || echo FAIL=true)
188 if [ "$FAIL" = true ]; then
189 exit 1
190 fi
191
192 if $verbose; then
193 echo
194 fi
195
196 if [ "$1" = "--dist-tool" ]; then
197 # Stop after building dist tool.
198 mkdir -p "$GOTOOLDIR"
199 if [ "$2" != "" ]; then
200 cp cmd/dist/dist "$2"
201 fi
202 mv cmd/dist/dist "$GOTOOLDIR"/dist
203 exit 0
204 fi
205
206 # Run dist bootstrap to complete make.bash.
207 # Bootstrap installs a proper cmd/dist, built with the new toolchain.
208 # Throw ours, built with Go 1.4, away after bootstrap.
209 ./cmd/dist/dist bootstrap -a $vflag $GO_DISTFLAGS "$@"
210 rm -f ./cmd/dist/dist
211
212 # DO NOT ADD ANY NEW CODE HERE.
213 # The bootstrap+rm above are the final step of make.bash.
214 # If something must be added, add it to cmd/dist's cmdbootstrap,
215 # to avoid needing three copies in three different shell languages
216 # (make.bash, make.bat, make.rc).
217
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