Added crosscompile.bash

Author: davecheney

crosscompile.bash

@@ -0,0 +1,49 @@
+#!/bin/bash
+# Copyright 2012 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# support functions for go cross compilation
+
+PLATFORMS="darwin/386 darwin/amd64 freebsd/386 freebsd/amd64 linux/386 linux/amd64 linux/arm windows/386 windows/amd64"
+
+eval "$(go env)"
+HOST_GOOS=${GOOS}
+HOST_GOARCH=${GOARCH}
+
+function cgo-enabled {
+	if [ "$1" = "${HOST_GOOS}" ]; then 
+		CGO_ENABLED=1
+	else 
+		CGO_ENABLED=0
+	fi
+}
+
+function go-alias {
+	GOOS=${1%/*}
+	GOARCH=${1#*/}
+	eval "function go-${GOOS}-${GOARCH} { (CGO_ENABLED=$(cgo-enabled ${GOOS}) GOOS=${GOOS} GOARCH=${GOARCH} go \$@ ) }"
+}
+
+function go-crosscompile-build {
+	GOOS=${1%/*}
+	GOARCH=${1#*/}
+	OUTPUT=$(cd ${GOROOT}/src ; CGO_ENABLED=$(cgo-enabled ${GOOS}) GOOS=${GOOS} GOARCH=${GOARCH} ./make.bash --no-clean 2>&1)
+	if [ $? -ne 0 ] ; then
+		echo "$OUTPUT" >&2
+	fi
+}
+
+function go-crosscompile-build-all {
+	set -e
+	for PLATFORM in $PLATFORMS; do
+		CMD="go-crosscompile-build ${PLATFORM}"
+		echo $CMD
+		$CMD
+	done
+}	
+
+for PLATFORM in $PLATFORMS; do
+	go-alias $PLATFORM
+done
+