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     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	# 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	# CXX_FOR_TARGET: Command line to run to compile C++ code for GOARCH.
    44	# This is used by cgo. Default is CXX, or, if that is not set, 
    45	# "g++" or "clang++".
    46	#
    47	# FC: Command line to run to compile Fortran code for GOARCH.
    48	# This is used by cgo. Default is "gfortran".
    49	#
    50	# PKG_CONFIG: Path to pkg-config tool. Default is "pkg-config".
    51	#
    52	# GO_DISTFLAGS: extra flags to provide to "dist bootstrap".
    53	
    54	set -e
    55	
    56	unset GOBIN # Issue 14340
    57	
    58	if [ ! -f run.bash ]; then
    59		echo 'make.bash must be run from $GOROOT/src' 1>&2
    60		exit 1
    61	fi
    62	
    63	# Test for Windows.
    64	case "$(uname)" in
    65	*MINGW* | *WIN32* | *CYGWIN*)
    66		echo 'ERROR: Do not use make.bash to build on Windows.'
    67		echo 'Use make.bat instead.'
    68		echo
    69		exit 1
    70		;;
    71	esac
    72	
    73	# Test for bad ld.
    74	if ld --version 2>&1 | grep 'gold.* 2\.20' >/dev/null; then
    75		echo 'ERROR: Your system has gold 2.20 installed.'
    76		echo 'This version is shipped by Ubuntu even though'
    77		echo 'it is known not to work on Ubuntu.'
    78		echo 'Binaries built with this linker are likely to fail in mysterious ways.'
    79		echo
    80		echo 'Run sudo apt-get remove binutils-gold.'
    81		echo
    82		exit 1
    83	fi
    84	
    85	# Test for bad SELinux.
    86	# On Fedora 16 the selinux filesystem is mounted at /sys/fs/selinux,
    87	# so loop through the possible selinux mount points.
    88	for se_mount in /selinux /sys/fs/selinux
    89	do
    90		if [ -d $se_mount -a -f $se_mount/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
    91			if ! cat $se_mount/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then
    92				echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
    93				echo "Go. You can enable the features that Go needs via the following "
    94				echo "command (as root):"
    95				echo "  # setsebool -P allow_execstack 1"
    96				echo
    97				echo "Note that this affects your system globally! "
    98				echo
    99				echo "The build will continue in five seconds in case we "
   100				echo "misdiagnosed the issue..."
   101	
   102				sleep 5
   103			fi
   104		fi
   105	done
   106	
   107	# Test for debian/kFreeBSD.
   108	# cmd/dist will detect kFreeBSD as freebsd/$GOARCH, but we need to
   109	# disable cgo manually.
   110	if [ "$(uname -s)" = "GNU/kFreeBSD" ]; then
   111		export CGO_ENABLED=0
   112	fi
   113	
   114	# Clean old generated file that will cause problems in the build.
   115	rm -f ./runtime/runtime_defs.go
   116	
   117	# Finally!  Run the build.
   118	
   119	echo '##### Building Go bootstrap tool.'
   120	echo cmd/dist
   121	export GOROOT="$(cd .. && pwd)"
   122	GOROOT_BOOTSTRAP=${GOROOT_BOOTSTRAP:-$HOME/go1.4}
   123	if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
   124		echo "ERROR: Cannot find $GOROOT_BOOTSTRAP/bin/go." >&2
   125		echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
   126		exit 1
   127	fi
   128	if [ "$GOROOT_BOOTSTRAP" = "$GOROOT" ]; then
   129		echo "ERROR: \$GOROOT_BOOTSTRAP must not be set to \$GOROOT" >&2
   130		echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
   131		exit 1
   132	fi
   133	rm -f cmd/dist/dist
   134	GOROOT="$GOROOT_BOOTSTRAP" GOOS="" GOARCH="" "$GOROOT_BOOTSTRAP/bin/go" build -o cmd/dist/dist ./cmd/dist
   135	
   136	# -e doesn't propagate out of eval, so check success by hand.
   137	eval $(./cmd/dist/dist env -p || echo FAIL=true)
   138	if [ "$FAIL" = true ]; then
   139		exit 1
   140	fi
   141	
   142	echo
   143	
   144	if [ "$1" = "--dist-tool" ]; then
   145		# Stop after building dist tool.
   146		mkdir -p "$GOTOOLDIR"
   147		if [ "$2" != "" ]; then
   148			cp cmd/dist/dist "$2"
   149		fi
   150		mv cmd/dist/dist "$GOTOOLDIR"/dist
   151		exit 0
   152	fi
   153	
   154	buildall="-a"
   155	if [ "$1" = "--no-clean" ]; then
   156		buildall=""
   157		shift
   158	fi
   159	./cmd/dist/dist bootstrap $buildall $GO_DISTFLAGS -v # builds go_bootstrap
   160	
   161	# Delay move of dist tool to now, because bootstrap may clear tool directory.
   162	mv cmd/dist/dist "$GOTOOLDIR"/dist
   163	echo
   164	
   165	if [ "$GOHOSTARCH" != "$GOARCH" -o "$GOHOSTOS" != "$GOOS" ]; then
   166		echo "##### Building packages and commands for host, $GOHOSTOS/$GOHOSTARCH."
   167		# CC_FOR_TARGET is recorded as the default compiler for the go tool. When building for the host, however,
   168		# use the host compiler, CC, from `cmd/dist/dist env` instead.
   169		CC=$CC GOOS=$GOHOSTOS GOARCH=$GOHOSTARCH \
   170			"$GOTOOLDIR"/go_bootstrap install -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v std cmd
   171		echo
   172	fi
   173	
   174	echo "##### Building packages and commands for $GOOS/$GOARCH."
   175	
   176	old_bin_files=$(cd $GOROOT/bin && echo *)
   177	
   178	CC=$CC_FOR_TARGET "$GOTOOLDIR"/go_bootstrap install $GO_FLAGS -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v std cmd
   179	
   180	# Check that there are no new files in $GOROOT/bin other than go and gofmt
   181	# and $GOOS_$GOARCH (a directory used when cross-compiling).
   182	(cd $GOROOT/bin && for f in *; do
   183		if ! expr " $old_bin_files go gofmt ${GOOS}_${GOARCH} " : ".* $f " >/dev/null 2>/dev/null; then
   184			echo 1>&2 "ERROR: unexpected new file in $GOROOT/bin: $f"
   185			exit 1
   186		fi
   187	done)
   188	
   189	echo
   190	
   191	rm -f "$GOTOOLDIR"/go_bootstrap
   192	
   193	if [ "$1" != "--no-banner" ]; then
   194		"$GOTOOLDIR"/dist banner
   195	fi

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