#!/bin/bash

############################

#

# Author: Koustubha Bhat

# Date : 3-April-2014

# VU University, Amsterdam.

#

############################

##################

# Initialization

##################

set -o errexit

MYPWD="`pwd`"

MINIX_ROOT=

MINIX_LLVM_DIR=

GOLD_DEST_DIR=

DEFAULT_LLVM_ROOT=

EXITCODE=0

function check_current_dir()

{

#Make sure we are running from the root dir of the Minix sources

if [ -d ./minix/drivers ] && [ -d ./minix/servers ] ; then

MINIX_ROOT="${MYPWD}"

elif [ -d ../../minix/drivers ] && [ -d ../../minix/servers ]; then

MINIX_ROOT="${MYPWD}/../.."

else

echo "Please run the script from either of the following locations:"

echo "> Root of the Minix sources."

echo " OR"

echo "> minix/llvm directory of the Minix sources."

exit 1

fi

MINIX_LLVM_DIR="${MINIX_ROOT}/minix/llvm"

GOLD_DEST_DIR="${MINIX_ROOT}/minix/llvm/bin"

DEFAULT_LLVM_ROOT="${MINIX_ROOT}/../../llvm-apps"

}

# Make sure we are running from the right directory

check_current_dir

# LLVM ROOT is the bridging connection from minix branch to the llvm-apps branch

if [ "${ROOT}" == "" ]; then

echo "\${ROOT} is not set."

echo "Please specify the path to the \"llvm-apps\" repository..."

echo "Default value: ${DEFAULT_LLVM_ROOT} . "

echo "If this is correct, press ENTER. Otherwise please enter the path."

if [ "$INTERACTIVE" = "no" ]; then

response=""

else

read response

fi

if [ "" == "${response}" ]; then

ROOT=${DEFAULT_LLVM_ROOT}

else

ROOT=${response}

fi

fi

echo "LLVM root directory is set to :"

echo " ${ROOT}"

# Persist the LLVM ROOT path information

[ -f ${MINIX_LLVM_DIR}/common.inc ] || cp ${MINIX_LLVM_DIR}/common.inc.default ${MINIX_LLVM_DIR}/common.inc

ROOT_1=`echo ${ROOT} | sed "s/\\\//\\\\\\\\\//g"`

sed -i "s/ROOT=.*$/ROOT=\"${ROOT_1}\"/g" ${MINIX_LLVM_DIR}/common.inc

. ${MINIX_LLVM_DIR}/minix.inc

# Configure llvm-apps

cp ${ROOT}/conf/common.overrides.llvm-minix.inc ${ROOT}/common.overrides.llvm.inc

MINIX_ROOT_1=`readlink -f ${MINIX_ROOT}`

echo "_MINIX_ROOT=\"${MINIX_ROOT_1}\"" > ${ROOT}/common.overrides.minix.inc

if [ ! -d ${ROOT}/.tmp ]; then

mkdir ${ROOT}/.tmp 2>/dev/null || true

fi

# Set default values for essential variables

: ${JOBS=1}

: ${GEN_GOLD_PLUGIN="yes"}

: ${REBUILD_MINIX="yes"}

########################

# Generate Gold Plugin

########################

if [ "${GEN_GOLD_PLUGIN}" == "yes" ] && [ -f "${MYPWD}/.gold_generated" ]; then

echo "It is found that Gold plugin has already been generated. Would you like to re-generate? [y | n]"

if [ "$INTERACTIVE" == "no" ]; then

response=n

else

read response

fi

if [ "y" == "$response" ] || [ "Y" == "$response" ]; then

echo "Gold shall be regenerated."

else

GEN_GOLD_PLUGIN="no"

fi

fi

if [ "${GEN_GOLD_PLUGIN}" == "yes" ]; then

${MINIX_LLVM_DIR}/generate_gold_plugin.sh

if [ ! -f "${GOLD_DEST_DIR}/libLTO.so" ] || [ ! -f "${GOLD_DEST_DIR}/LLVMgold.so" ]; then

echo "Failure: generate_gold_plugin.sh"

exit 1

fi

echo "Finished generating gold plugin."

touch "${MYPWD}/.gold_generated"

else

echo "Gold plugin generation: NO"

fi

########################

# Build Minix

########################

if [ "${REBUILD_MINIX}" == "yes" ]; then

echo "Building Minix..."

echo "CC:$CC"

echo "CXX:$CXX"

echo "JOBS:$JOBS"

echo

cd ${MINIX_ROOT}

BUILDVARS="-V MKBITCODE=yes" ./releasetools/x86_hdimage.sh

EXITCODE=$?

cd ${MYPWD}

if [ "$EXITCODE" != "0" ]; then

echo "Error: Failed building Minix source code."

exit $EXITCODE

else

echo "Completed building Minix source code."

exit $EXITCODE

fi

else

echo "Building Minix: NO"

fi

# Reconfigure llvm-apps

MINIX_TOOLS_DIR=$(readlink -f ${MINIX_ROOT}/../obj.i386/tooldir.*)

echo "MINIX_TOOLS_DIR=\"${MINIX_TOOLS_DIR}\"" >> ${ROOT}/common.overrides.minix.inc