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

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