Merge branch 'cross-compile' into chroot-hvm

scripts/linuxcompile.sh

+#!/bin/bash
+#
+# To be able to cross compile:
+#   cd /usr/local/go/src
+#   sudo GOOS=linux GOARCH=amd64 ./make.bash --no-clean
+#
+# This script only builds the application from source.
+set -e
+
+NO_COLOR="\x1b[0m"
+OK_COLOR="\x1b[32;01m"
+ERROR_COLOR="\x1b[31;01m"
+WARN_COLOR="\x1b[33;01m"
+
+# http://stackoverflow.com/questions/4023830/bash-how-compare-two-strings-in-version-format
+verify_go () {
+    if [[ $1 == $2 ]]; then
+        return 0
+    fi
+
+    local IFS=.
+    local i ver1=($1) ver2=($2)
+
+    for ((i=${#ver1[@]}; i<${#ver2[@]}; i++)); do
+        ver1[i]=0
+    done
+
+    for ((i=0; i<${#ver1[@]}; i++)); do
+        if [[ -z ${ver2[i]} ]]; then
+            ver2[i]=0
+        fi
+        if ((10#${ver1[i]} > 10#${ver2[i]})); then
+            echo -e "${ERROR_COLOR}==> Required Go version $1 not installed. Found $2 instead"
+            exit 1
+        fi
+    done
+}
+
+GO_MINIMUM_VERSION=1.2
+GO_INSTALLED_VERSION=$(go version | cut -d ' ' -f 3)
+GO_INSTALLED_VERSION=${GO_INSTALLED_VERSION#"go"}
+
+echo -e "${OK_COLOR}==> Verifying Go"
+verify_go $GO_MINIMUM_VERSION $GO_INSTALLED_VERSION
+
+# Get the parent directory of where this script is.
+SOURCE="${BASH_SOURCE[0]}"
+while [ -h "$SOURCE" ] ; do SOURCE="$(readlink "$SOURCE")"; done
+DIR="$( cd -P "$( dirname "$SOURCE" )/.." && pwd )"
+
+# Change into that directory
+cd $DIR
+
+# Compile the thing
+export XC_ARCH=amd64
+export XC_OS=linux
+./scripts/compile.sh
+
+echo "-- DONE --"
+echo "Binaries are in ./pkg/linux_amd64/"