#!/bin/bash
set -e -o pipefail

# This script builds the go cross compilers for ChromeOS targets.
#
# Usage: build_go
#
# It assumes that the "x86_64-cros-linux-gnu" toolchain is already installed.
# It assumes that the "armv7a-cros-linux-gnueabihf" toolchain is
# already installed.
# It assumes that the "aarch64-cros-linux-gnu" toolchain is already installed.

if [[ ! -e "make.bash" && -e "src/make.bash" ]]
then
	cd src
fi

# Build the Go toolchain for amd64 targets.
GOOS="linux" GOARCH="amd64" CGO_ENABLED="1" \
	CC_FOR_TARGET="x86_64-cros-linux-gnu-clang" \
	CXX_FOR_TARGET="x86_64-cros-linux-gnu-clang++" \
	./make.bash --no-clean
GOOS="linux" GOARCH="amd64" CGO_ENABLED="1" \
	CC="x86_64-cros-linux-gnu-clang" \
	CXX="x86_64-cros-linux-gnu-clang++" \
	../bin/go install -v -buildmode=pie std

# Build the Go toolchain for arm targets.
GOOS="linux" GOARCH="arm" CGO_ENABLED="1" \
	CC_FOR_TARGET="armv7a-cros-linux-gnueabihf-clang" \
	CXX_FOR_TARGET="armv7a-cros-linux-gnueabihf-clang++" \
	./make.bash --no-clean
GOOS="linux" GOARCH="arm" CGO_ENABLED="1" \
	CC="armv7a-cros-linux-gnueabihf-clang" \
	CXX="armv7a-cros-linux-gnueabihf-clang++" \
	../bin/go install -v -buildmode=pie std

# Build the Go toolchain for arm64 targets.
GOOS="linux" GOARCH="arm64" CGO_ENABLED="1" \
	CC_FOR_TARGET="aarch64-cros-linux-gnu-clang" \
	CXX_FOR_TARGET="aarch64-cros-linux-gnu-clang++" \
	./make.bash --no-clean
GOOS="linux" GOARCH="arm64" CGO_ENABLED="1" \
	CC="aarch64-cros-linux-gnu-clang" \
	CXX="aarch64-cros-linux-gnu-clang++" \
	../bin/go install -v -buildmode=pie std