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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 CC=$CC_FOR_TARGET "$GOTOOLDIR"/go_bootstrap install $GO_FLAGS -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v std cmd
    176 echo
    177 
    178 rm -f "$GOTOOLDIR"/go_bootstrap
    179 
    180 if [ "$1" != "--no-banner" ]; then
    181 	"$GOTOOLDIR"/dist banner
    182 fi
    183