src/make.bash - go - Git at Google

 #!/usr/bin/env bash
 # Copyright 2009 The Go Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.

 # See golang.org/s/go15bootstrap for an overview of the build process.

 # Environment variables that control make.bash:
 #
 # GOROOT_FINAL: The expected final Go root, baked into binaries.
 # The default is the location of the Go tree during the build.
 #
 # GOHOSTARCH: The architecture for host tools (compilers and
 # binaries).  Binaries of this type must be executable on the current
 # system, so the only common reason to set this is to set
 # GOHOSTARCH=386 on an amd64 machine.
 #
 # GOARCH: The target architecture for installed packages and tools.
 #
 # GOOS: The target operating system for installed packages and tools.
 #
 # GO_GCFLAGS: Additional go tool compile arguments to use when
 # building the packages and commands.
 #
 # GO_LDFLAGS: Additional go tool link arguments to use when
 # building the commands.
 #
 # CGO_ENABLED: Controls cgo usage during the build. Set it to 1
 # to include all cgo related files, .c and .go file with "cgo"
 # build directive, in the build. Set it to 0 to ignore them.
 #
 # GO_EXTLINK_ENABLED: Set to 1 to invoke the host linker when building
 # packages that use cgo.  Set to 0 to do all linking internally.  This
 # controls the default behavior of the linker's -linkmode option.  The
 # default value depends on the system.
 #
 # CC: Command line to run to compile C code for GOHOSTARCH.
 # Default is "gcc". Also supported: "clang".
 #
 # CC_FOR_TARGET: Command line to run to compile C code for GOARCH.
 # This is used by cgo.  Default is CC.
 #
 # CXX_FOR_TARGET: Command line to run to compile C++ code for GOARCH.
 # This is used by cgo. Default is CXX, or, if that is not set,
 # "g++" or "clang++".
 #
 # FC: Command line to run to compile Fortran code for GOARCH.
 # This is used by cgo. Default is "gfortran".
 #
 # PKG_CONFIG: Path to pkg-config tool. Default is "pkg-config".
 #
 # GO_DISTFLAGS: extra flags to provide to "dist bootstrap".

 set -e

 unset GOBIN # Issue 14340

 if [ ! -f run.bash ]; then
 	echo 'make.bash must be run from $GOROOT/src' 1>&2
 	exit 1
 fi

 # Test for Windows.
 case "$(uname)" in
 *MINGW* | *WIN32* | *CYGWIN*)
 	echo 'ERROR: Do not use make.bash to build on Windows.'
 	echo 'Use make.bat instead.'
 	echo
 	exit 1
 	;;
 esac

 # Test for bad ld.
 if ld --version 2>&1 | grep 'gold.* 2\.20' >/dev/null; then
 	echo 'ERROR: Your system has gold 2.20 installed.'
 	echo 'This version is shipped by Ubuntu even though'
 	echo 'it is known not to work on Ubuntu.'
 	echo 'Binaries built with this linker are likely to fail in mysterious ways.'
 	echo
 	echo 'Run sudo apt-get remove binutils-gold.'
 	echo
 	exit 1
 fi

 # Test for bad SELinux.
 # On Fedora 16 the selinux filesystem is mounted at /sys/fs/selinux,
 # so loop through the possible selinux mount points.
 for se_mount in /selinux /sys/fs/selinux
 do
 	if [ -d $se_mount -a -f $se_mount/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
 		if ! cat $se_mount/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then
 			echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
 			echo "Go. You can enable the features that Go needs via the following "
 			echo "command (as root):"
 			echo "  # setsebool -P allow_execstack 1"
 			echo
 			echo "Note that this affects your system globally! "
 			echo
 			echo "The build will continue in five seconds in case we "
 			echo "misdiagnosed the issue..."

 			sleep 5
 		fi
 	fi
 done

 # Test for debian/kFreeBSD.
 # cmd/dist will detect kFreeBSD as freebsd/$GOARCH, but we need to
 # disable cgo manually.
 if [ "$(uname -s)" = "GNU/kFreeBSD" ]; then
 	export CGO_ENABLED=0
 fi

 # Clean old generated file that will cause problems in the build.
 rm -f ./runtime/runtime_defs.go

 # Finally!  Run the build.

 echo '##### Building Go bootstrap tool.'
 echo cmd/dist
 export GOROOT="$(cd .. && pwd)"
 GOROOT_BOOTSTRAP=${GOROOT_BOOTSTRAP:-$HOME/go1.4}
 if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
 	echo "ERROR: Cannot find $GOROOT_BOOTSTRAP/bin/go." >&2
 	echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
 	exit 1
 fi
 if [ "$GOROOT_BOOTSTRAP" = "$GOROOT" ]; then
 	echo "ERROR: \$GOROOT_BOOTSTRAP must not be set to \$GOROOT" >&2
 	echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
 	exit 1
 fi
 rm -f cmd/dist/dist
 GOROOT="$GOROOT_BOOTSTRAP" GOOS="" GOARCH="" "$GOROOT_BOOTSTRAP/bin/go" build -o cmd/dist/dist ./cmd/dist

 # -e doesn't propagate out of eval, so check success by hand.
 eval $(./cmd/dist/dist env -p || echo FAIL=true)
 if [ "$FAIL" = true ]; then
 	exit 1
 fi

 echo

 if [ "$1" = "--dist-tool" ]; then
 	# Stop after building dist tool.
 	mkdir -p "$GOTOOLDIR"
 	if [ "$2" != "" ]; then
 		cp cmd/dist/dist "$2"
 	fi
 	mv cmd/dist/dist "$GOTOOLDIR"/dist
 	exit 0
 fi

 buildall="-a"
 if [ "$1" = "--no-clean" ]; then
 	buildall=""
 	shift
 fi
 ./cmd/dist/dist bootstrap $buildall $GO_DISTFLAGS -v # builds go_bootstrap

 # Delay move of dist tool to now, because bootstrap may clear tool directory.
 mv cmd/dist/dist "$GOTOOLDIR"/dist
 echo

 if [ "$GOHOSTARCH" != "$GOARCH" -o "$GOHOSTOS" != "$GOOS" ]; then
 	echo "##### Building packages and commands for host, $GOHOSTOS/$GOHOSTARCH."
 	# CC_FOR_TARGET is recorded as the default compiler for the go tool. When building for the host, however,
 	# use the host compiler, CC, from `cmd/dist/dist env` instead.
 	CC=$CC GOOS=$GOHOSTOS GOARCH=$GOHOSTARCH \
 		"$GOTOOLDIR"/go_bootstrap install -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v std cmd
 	echo
 fi

 echo "##### Building packages and commands for $GOOS/$GOARCH."

 old_bin_files=$(cd $GOROOT/bin && echo *)

 CC=$CC_FOR_TARGET "$GOTOOLDIR"/go_bootstrap install $GO_FLAGS -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v std cmd

 # Check that there are no new files in $GOROOT/bin other than go and gofmt
 # and $GOOS_$GOARCH (a directory used when cross-compiling).
 (cd $GOROOT/bin && for f in *; do
 	if ! expr " $old_bin_files go gofmt ${GOOS}_${GOARCH} " : ".* $f " >/dev/null 2>/dev/null; then
 		echo 1>&2 "ERROR: unexpected new file in $GOROOT/bin: $f"
 		exit 1
 	fi
 done)

 echo

 rm -f "$GOTOOLDIR"/go_bootstrap

 if [ "$1" != "--no-banner" ]; then
 	"$GOTOOLDIR"/dist banner
 fi
	#!/usr/bin/env bash
	# Copyright 2009 The Go Authors. All rights reserved.
	# Use of this source code is governed by a BSD-style
	# license that can be found in the LICENSE file.

	# See golang.org/s/go15bootstrap for an overview of the build process.

	# Environment variables that control make.bash:
	#
	# GOROOT_FINAL: The expected final Go root, baked into binaries.
	# The default is the location of the Go tree during the build.
	#
	# GOHOSTARCH: The architecture for host tools (compilers and
	# binaries). Binaries of this type must be executable on the current
	# system, so the only common reason to set this is to set
	# GOHOSTARCH=386 on an amd64 machine.
	#
	# GOARCH: The target architecture for installed packages and tools.
	#
	# GOOS: The target operating system for installed packages and tools.
	#
	# GO_GCFLAGS: Additional go tool compile arguments to use when
	# building the packages and commands.
	#
	# GO_LDFLAGS: Additional go tool link arguments to use when
	# building the commands.
	#
	# CGO_ENABLED: Controls cgo usage during the build. Set it to 1
	# to include all cgo related files, .c and .go file with "cgo"
	# build directive, in the build. Set it to 0 to ignore them.
	#
	# GO_EXTLINK_ENABLED: Set to 1 to invoke the host linker when building
	# packages that use cgo. Set to 0 to do all linking internally. This
	# controls the default behavior of the linker's -linkmode option. The
	# default value depends on the system.
	#
	# CC: Command line to run to compile C code for GOHOSTARCH.
	# Default is "gcc". Also supported: "clang".
	#
	# CC_FOR_TARGET: Command line to run to compile C code for GOARCH.
	# This is used by cgo. Default is CC.
	#
	# CXX_FOR_TARGET: Command line to run to compile C++ code for GOARCH.
	# This is used by cgo. Default is CXX, or, if that is not set,
	# "g++" or "clang++".
	#
	# FC: Command line to run to compile Fortran code for GOARCH.
	# This is used by cgo. Default is "gfortran".
	#
	# PKG_CONFIG: Path to pkg-config tool. Default is "pkg-config".
	#
	# GO_DISTFLAGS: extra flags to provide to "dist bootstrap".

	set -e

	unset GOBIN # Issue 14340

	if [ ! -f run.bash ]; then
	echo 'make.bash must be run from $GOROOT/src' 1>&2
	exit 1
	fi

	# Test for Windows.
	case "$(uname)" in
	MINGW \| WIN32 \| CYGWIN)
	echo 'ERROR: Do not use make.bash to build on Windows.'
	echo 'Use make.bat instead.'
	echo
	exit 1
	;;
	esac

	# Test for bad ld.
	if ld --version 2>&1 \| grep 'gold.* 2\.20' >/dev/null; then
	echo 'ERROR: Your system has gold 2.20 installed.'
	echo 'This version is shipped by Ubuntu even though'
	echo 'it is known not to work on Ubuntu.'
	echo 'Binaries built with this linker are likely to fail in mysterious ways.'
	echo
	echo 'Run sudo apt-get remove binutils-gold.'
	echo
	exit 1
	fi

	# Test for bad SELinux.
	# On Fedora 16 the selinux filesystem is mounted at /sys/fs/selinux,
	# so loop through the possible selinux mount points.
	for se_mount in /selinux /sys/fs/selinux
	do
	if [ -d $se_mount -a -f $se_mount/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
	if ! cat $se_mount/booleans/allow_execstack \| grep -c '^1 1$' >> /dev/null ; then
	echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
	echo "Go. You can enable the features that Go needs via the following "
	echo "command (as root):"
	echo " # setsebool -P allow_execstack 1"
	echo
	echo "Note that this affects your system globally! "
	echo
	echo "The build will continue in five seconds in case we "
	echo "misdiagnosed the issue..."

	sleep 5
	fi
	fi
	done

	# Test for debian/kFreeBSD.
	# cmd/dist will detect kFreeBSD as freebsd/$GOARCH, but we need to
	# disable cgo manually.
	if [ "$(uname -s)" = "GNU/kFreeBSD" ]; then
	export CGO_ENABLED=0
	fi

	# Clean old generated file that will cause problems in the build.
	rm -f ./runtime/runtime_defs.go

	# Finally! Run the build.

	echo '##### Building Go bootstrap tool.'
	echo cmd/dist
	export GOROOT="$(cd .. && pwd)"
	GOROOT_BOOTSTRAP=${GOROOT_BOOTSTRAP:-$HOME/go1.4}
	if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
	echo "ERROR: Cannot find $GOROOT_BOOTSTRAP/bin/go." >&2
	echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
	exit 1
	fi
	if [ "$GOROOT_BOOTSTRAP" = "$GOROOT" ]; then
	echo "ERROR: \$GOROOT_BOOTSTRAP must not be set to \$GOROOT" >&2
	echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
	exit 1
	fi
	rm -f cmd/dist/dist
	GOROOT="$GOROOT_BOOTSTRAP" GOOS="" GOARCH="" "$GOROOT_BOOTSTRAP/bin/go" build -o cmd/dist/dist ./cmd/dist

	# -e doesn't propagate out of eval, so check success by hand.
	eval $(./cmd/dist/dist env -p \|\| echo FAIL=true)
	if [ "$FAIL" = true ]; then
	exit 1
	fi

	echo

	if [ "$1" = "--dist-tool" ]; then
	# Stop after building dist tool.
	mkdir -p "$GOTOOLDIR"
	if [ "$2" != "" ]; then
	cp cmd/dist/dist "$2"
	fi
	mv cmd/dist/dist "$GOTOOLDIR"/dist
	exit 0
	fi

	buildall="-a"
	if [ "$1" = "--no-clean" ]; then
	buildall=""
	shift
	fi
	./cmd/dist/dist bootstrap $buildall $GO_DISTFLAGS -v # builds go_bootstrap

	# Delay move of dist tool to now, because bootstrap may clear tool directory.
	mv cmd/dist/dist "$GOTOOLDIR"/dist
	echo

	if [ "$GOHOSTARCH" != "$GOARCH" -o "$GOHOSTOS" != "$GOOS" ]; then
	echo "##### Building packages and commands for host, $GOHOSTOS/$GOHOSTARCH."
	# CC_FOR_TARGET is recorded as the default compiler for the go tool. When building for the host, however,
	# use the host compiler, CC, from `cmd/dist/dist env` instead.
	CC=$CC GOOS=$GOHOSTOS GOARCH=$GOHOSTARCH \
	"$GOTOOLDIR"/go_bootstrap install -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v std cmd
	echo
	fi

	echo "##### Building packages and commands for $GOOS/$GOARCH."

	old_bin_files=$(cd $GOROOT/bin && echo *)

	CC=$CC_FOR_TARGET "$GOTOOLDIR"/go_bootstrap install $GO_FLAGS -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v std cmd

	# Check that there are no new files in $GOROOT/bin other than go and gofmt
	# and $GOOS_$GOARCH (a directory used when cross-compiling).
	(cd $GOROOT/bin && for f in *; do
	if ! expr " $old_bin_files go gofmt ${GOOS}_${GOARCH} " : ".* $f " >/dev/null 2>/dev/null; then
	echo 1>&2 "ERROR: unexpected new file in $GOROOT/bin: $f"
	exit 1
	fi
	done)

	echo

	rm -f "$GOTOOLDIR"/go_bootstrap

	if [ "$1" != "--no-banner" ]; then
	"$GOTOOLDIR"/dist banner
	fi