github.com/yanyiwu/go@v0.0.0-20150106053140-03d6637dbb7f/src/make.bash (about) 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 # Environment variables that control make.bash: 7 # 8 # GOROOT_FINAL: The expected final Go root, baked into binaries. 9 # The default is the location of the Go tree during the build. 10 # 11 # GOHOSTARCH: The architecture for host tools (compilers and 12 # binaries). Binaries of this type must be executable on the current 13 # system, so the only common reason to set this is to set 14 # GOHOSTARCH=386 on an amd64 machine. 15 # 16 # GOARCH: The target architecture for installed packages and tools. 17 # 18 # GOOS: The target operating system for installed packages and tools. 19 # 20 # GO_GCFLAGS: Additional 5g/6g/8g arguments to use when 21 # building the packages and commands. 22 # 23 # GO_LDFLAGS: Additional 5l/6l/8l arguments to use when 24 # building the commands. 25 # 26 # GO_CCFLAGS: Additional 5c/6c/8c arguments to use when 27 # building. 28 # 29 # CGO_ENABLED: Controls cgo usage during the build. Set it to 1 30 # to include all cgo related files, .c and .go file with "cgo" 31 # build directive, in the build. Set it to 0 to ignore them. 32 # 33 # GO_EXTLINK_ENABLED: Set to 1 to invoke the host linker when building 34 # packages that use cgo. Set to 0 to do all linking internally. This 35 # controls the default behavior of the linker's -linkmode option. The 36 # default value depends on the system. 37 # 38 # CC: Command line to run to compile C code for GOHOSTARCH. 39 # Default is "gcc". Also supported: "clang". 40 # 41 # CC_FOR_TARGET: Command line to run to compile C code for GOARCH. 42 # This is used by cgo. Default is CC. 43 # 44 # CXX_FOR_TARGET: Command line to run to compile C++ code for GOARCH. 45 # This is used by cgo. Default is CXX, or, if that is not set, 46 # "g++" or "clang++". 47 # 48 # GO_DISTFLAGS: extra flags to provide to "dist bootstrap". Use "-s" 49 # to build a statically linked toolchain. 50 51 set -e 52 if [ ! -f run.bash ]; then 53 echo 'make.bash must be run from $GOROOT/src' 1>&2 54 exit 1 55 fi 56 57 # Test for Windows. 58 case "$(uname)" in 59 *MINGW* | *WIN32* | *CYGWIN*) 60 echo 'ERROR: Do not use make.bash to build on Windows.' 61 echo 'Use make.bat instead.' 62 echo 63 exit 1 64 ;; 65 esac 66 67 # Test for bad ld. 68 if ld --version 2>&1 | grep 'gold.* 2\.20' >/dev/null; then 69 echo 'ERROR: Your system has gold 2.20 installed.' 70 echo 'This version is shipped by Ubuntu even though' 71 echo 'it is known not to work on Ubuntu.' 72 echo 'Binaries built with this linker are likely to fail in mysterious ways.' 73 echo 74 echo 'Run sudo apt-get remove binutils-gold.' 75 echo 76 exit 1 77 fi 78 79 # Test for bad SELinux. 80 # On Fedora 16 the selinux filesystem is mounted at /sys/fs/selinux, 81 # so loop through the possible selinux mount points. 82 for se_mount in /selinux /sys/fs/selinux 83 do 84 if [ -d $se_mount -a -f $se_mount/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then 85 if ! cat $se_mount/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then 86 echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks " 87 echo "Go. You can enable the features that Go needs via the following " 88 echo "command (as root):" 89 echo " # setsebool -P allow_execstack 1" 90 echo 91 echo "Note that this affects your system globally! " 92 echo 93 echo "The build will continue in five seconds in case we " 94 echo "misdiagnosed the issue..." 95 96 sleep 5 97 fi 98 fi 99 done 100 101 # Test for debian/kFreeBSD. 102 # cmd/dist will detect kFreeBSD as freebsd/$GOARCH, but we need to 103 # disable cgo manually. 104 if [ "$(uname -s)" == "GNU/kFreeBSD" ]; then 105 export CGO_ENABLED=0 106 fi 107 108 # Clean old generated file that will cause problems in the build. 109 rm -f ./runtime/runtime_defs.go 110 111 # Finally! Run the build. 112 113 echo '##### Building C bootstrap tool.' 114 echo cmd/dist 115 export GOROOT="$(cd .. && pwd)" 116 GOROOT_FINAL="${GOROOT_FINAL:-$GOROOT}" 117 DEFGOROOT='-DGOROOT_FINAL="'"$GOROOT_FINAL"'"' 118 119 mflag="" 120 case "$GOHOSTARCH" in 121 386) mflag=-m32;; 122 amd64) mflag=-m64;; 123 esac 124 if [ "$(uname)" == "Darwin" ]; then 125 # golang.org/issue/5261 126 mflag="$mflag -mmacosx-version-min=10.6" 127 fi 128 # if gcc does not exist and $CC is not set, try clang if available. 129 if [ -z "$CC" -a -z "$(type -t gcc)" -a -n "$(type -t clang)" ]; then 130 export CC=clang CXX=clang++ 131 fi 132 ${CC:-gcc} $mflag -O2 -Wall -Werror -o cmd/dist/dist -Icmd/dist "$DEFGOROOT" cmd/dist/*.c 133 134 # -e doesn't propagate out of eval, so check success by hand. 135 eval $(./cmd/dist/dist env -p || echo FAIL=true) 136 if [ "$FAIL" = true ]; then 137 exit 1 138 fi 139 140 echo 141 142 if [ "$1" = "--dist-tool" ]; then 143 # Stop after building dist tool. 144 mkdir -p "$GOTOOLDIR" 145 if [ "$2" != "" ]; then 146 cp cmd/dist/dist "$2" 147 fi 148 mv cmd/dist/dist "$GOTOOLDIR"/dist 149 exit 0 150 fi 151 152 echo "##### Building compilers and Go bootstrap tool for host, $GOHOSTOS/$GOHOSTARCH." 153 buildall="-a" 154 if [ "$1" = "--no-clean" ]; then 155 buildall="" 156 shift 157 fi 158 ./cmd/dist/dist bootstrap $buildall $GO_DISTFLAGS -v # builds go_bootstrap 159 # Delay move of dist tool to now, because bootstrap may clear tool directory. 160 mv cmd/dist/dist "$GOTOOLDIR"/dist 161 "$GOTOOLDIR"/go_bootstrap clean -i std 162 echo 163 164 if [ "$GOHOSTARCH" != "$GOARCH" -o "$GOHOSTOS" != "$GOOS" ]; then 165 echo "##### Building packages and commands for host, $GOHOSTOS/$GOHOSTARCH." 166 # CC_FOR_TARGET is recorded as the default compiler for the go tool. When building for the host, however, 167 # use the host compiler, CC, from `cmd/dist/dist env` instead. 168 CC=$CC GOOS=$GOHOSTOS GOARCH=$GOHOSTARCH \ 169 "$GOTOOLDIR"/go_bootstrap install -ccflags "$GO_CCFLAGS" -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v std 170 echo 171 fi 172 173 echo "##### Building packages and commands for $GOOS/$GOARCH." 174 CC=$CC_FOR_TARGET "$GOTOOLDIR"/go_bootstrap install $GO_FLAGS -ccflags "$GO_CCFLAGS" -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v std 175 echo 176 177 rm -f "$GOTOOLDIR"/go_bootstrap 178 179 if [ "$1" != "--no-banner" ]; then 180 "$GOTOOLDIR"/dist banner 181 fi