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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	# (Or just pass them to the make.bash command line.)
    54	#
    55	# GOBUILDTIMELOGFILE: If set, make.bash and all.bash write
    56	# timing information to this file. Useful for profiling where the
    57	# time goes when these scripts run.
    58	#
    59	# GOROOT_BOOTSTRAP: A working Go tree >= Go 1.4 for bootstrap.
    60	# If $GOROOT_BOOTSTRAP/bin/go is missing, $(go env GOROOT) is
    61	# tried for all "go" in $PATH. $HOME/go1.4 by default.
    62	
    63	set -e
    64	
    65	unset GOBIN # Issue 14340
    66	unset GOFLAGS
    67	
    68	if [ ! -f run.bash ]; then
    69		echo 'make.bash must be run from $GOROOT/src' 1>&2
    70		exit 1
    71	fi
    72	
    73	if [ "$GOBUILDTIMELOGFILE" != "" ]; then
    74		echo $(LC_TIME=C date) start make.bash >"$GOBUILDTIMELOGFILE"
    75	fi
    76	
    77	# Test for Windows.
    78	case "$(uname)" in
    79	*MINGW* | *WIN32* | *CYGWIN*)
    80		echo 'ERROR: Do not use make.bash to build on Windows.'
    81		echo 'Use make.bat instead.'
    82		echo
    83		exit 1
    84		;;
    85	esac
    86	
    87	# Test for bad ld.
    88	if ld --version 2>&1 | grep 'gold.* 2\.20' >/dev/null; then
    89		echo 'ERROR: Your system has gold 2.20 installed.'
    90		echo 'This version is shipped by Ubuntu even though'
    91		echo 'it is known not to work on Ubuntu.'
    92		echo 'Binaries built with this linker are likely to fail in mysterious ways.'
    93		echo
    94		echo 'Run sudo apt-get remove binutils-gold.'
    95		echo
    96		exit 1
    97	fi
    98	
    99	# Test for bad SELinux.
   100	# On Fedora 16 the selinux filesystem is mounted at /sys/fs/selinux,
   101	# so loop through the possible selinux mount points.
   102	for se_mount in /selinux /sys/fs/selinux
   103	do
   104		if [ -d $se_mount -a -f $se_mount/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
   105			if ! cat $se_mount/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then
   106				echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
   107				echo "Go. You can enable the features that Go needs via the following "
   108				echo "command (as root):"
   109				echo "  # setsebool -P allow_execstack 1"
   110				echo
   111				echo "Note that this affects your system globally! "
   112				echo
   113				echo "The build will continue in five seconds in case we "
   114				echo "misdiagnosed the issue..."
   115	
   116				sleep 5
   117			fi
   118		fi
   119	done
   120	
   121	# Test for debian/kFreeBSD.
   122	# cmd/dist will detect kFreeBSD as freebsd/$GOARCH, but we need to
   123	# disable cgo manually.
   124	if [ "$(uname -s)" = "GNU/kFreeBSD" ]; then
   125		export CGO_ENABLED=0
   126	fi
   127	
   128	# Clean old generated file that will cause problems in the build.
   129	rm -f ./runtime/runtime_defs.go
   130	
   131	# Finally!  Run the build.
   132	
   133	verbose=false
   134	vflag=""
   135	if [ "$1" = "-v" ]; then
   136		verbose=true
   137		vflag=-v
   138		shift
   139	fi
   140	
   141	export GOROOT_BOOTSTRAP=${GOROOT_BOOTSTRAP:-$HOME/go1.4}
   142	export GOROOT="$(cd .. && pwd)"
   143	IFS=$'\n'; for go_exe in $(type -ap go); do
   144		if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
   145			goroot=$(GOROOT='' GOOS='' GOARCH='' "$go_exe" env GOROOT)
   146			if [ "$goroot" != "$GOROOT" ]; then
   147				GOROOT_BOOTSTRAP=$goroot
   148			fi
   149		fi
   150	done; unset IFS
   151	echo "Building Go cmd/dist using $GOROOT_BOOTSTRAP."
   152	if $verbose; then
   153		echo cmd/dist
   154	fi
   155	if [ ! -x "$GOROOT_BOOTSTRAP/bin/go" ]; then
   156		echo "ERROR: Cannot find $GOROOT_BOOTSTRAP/bin/go." >&2
   157		echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
   158		exit 1
   159	fi
   160	if [ "$GOROOT_BOOTSTRAP" = "$GOROOT" ]; then
   161		echo "ERROR: \$GOROOT_BOOTSTRAP must not be set to \$GOROOT" >&2
   162		echo "Set \$GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4." >&2
   163		exit 1
   164	fi
   165	rm -f cmd/dist/dist
   166	GOROOT="$GOROOT_BOOTSTRAP" GOOS="" GOARCH="" "$GOROOT_BOOTSTRAP/bin/go" build -o cmd/dist/dist ./cmd/dist
   167	
   168	# -e doesn't propagate out of eval, so check success by hand.
   169	eval $(./cmd/dist/dist env -p || echo FAIL=true)
   170	if [ "$FAIL" = true ]; then
   171		exit 1
   172	fi
   173	
   174	if $verbose; then
   175		echo
   176	fi
   177	
   178	if [ "$1" = "--dist-tool" ]; then
   179		# Stop after building dist tool.
   180		mkdir -p "$GOTOOLDIR"
   181		if [ "$2" != "" ]; then
   182			cp cmd/dist/dist "$2"
   183		fi
   184		mv cmd/dist/dist "$GOTOOLDIR"/dist
   185		exit 0
   186	fi
   187	
   188	buildall="-a"
   189	if [ "$1" = "--no-clean" ]; then
   190		buildall=""
   191		shift
   192	fi
   193	
   194	# Run dist bootstrap to complete make.bash.
   195	# Bootstrap installs a proper cmd/dist, built with the new toolchain.
   196	# Throw ours, built with Go 1.4, away after bootstrap.
   197	./cmd/dist/dist bootstrap $buildall $vflag $GO_DISTFLAGS "$@"
   198	rm -f ./cmd/dist/dist
   199	
   200	# DO NOT ADD ANY NEW CODE HERE.
   201	# The bootstrap+rm above are the final step of make.bash.
   202	# If something must be added, add it to cmd/dist's cmdbootstrap,
   203	# to avoid needing three copies in three different shell languages
   204	# (make.bash, make.bat, make.rc).

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