#
# hdw-linux Config script
#
# author: 	hackbard
#
# script initializing environment
# 

hdw_status=""

while [ "$1" ] ; do
	case "$1" in
		-stage)		hdw_status="$2"		; shift 2 ;;
		*)		echo 
				echo "Usage:"
				echo
				echo " ./scripts/Config -stage <stagelevel>"
				echo ;;
	esac
done

if [ -z "$hdw_status" ]; then
	echo "something went wrong. stage needs to be specified."
	exit 1
fi

# execute  Config file & create symlink to doc/README + doc/BUILD
if [ -f ./Config ] ; then
	hdw_home_dir=`pwd`
	echo "setting hdw_home_dir to $hdw_home_dir"
	echo "reading ./Config file"
	. ./Config
	[ ! -s ./README ] && ln -s ./doc/README .
	[ ! -s ./BUILD ] && ln -s ./doc/BUILD .
	[ ! -s ./INSTALL ] && ln -s ./doc/INSTALL .
	[ ! -s ./License ] && ln -s ./doc/License .
else
	echo "./Config file not found. are you in correct directory?"
	exit 1
fi

# define the stage 0/1 prefix to use
# default "static", though no static linking is done anymore in stage1
if [ -z "$hdw_stage1_prefix" ] ; then
	 s1_prefix="static" # default
else
	s1_prefix=$hdw_stage1_prefix
fi

# lets see what root is:
[ "$hdw_status" = "2" -o "$hdw_status" = "3" ] && root=""
if [ "$hdw_status" -lt 2 -o "$hdw_crossbuild" != "0" ] ; then
	if [ -z "$hdw_build_dir" ] ; then
		echo "please set hdw_build_dir in ./Config!"
		exit 1
	elif [ ! -d $hdw_build_dir ] ; then
		echo "please set _existing_ hdw_build_dir in ./Config"
		exit 1
	else
		echo "hdw_build_dir variable set to $hdw_build_dir"
		root="$hdw_build_dir"
	fi
fi

# setting up general environment, now that we know $root
set +h
umask 022
export LC_ALL=POSIX
[ "$hdw_status" -lt "2" ] && export PATH="$root/${s1_prefix}/bin:$PATH"

# let's do optimization and care for crossbuilds
if [ ! -z "`uname --version | grep sh-utils`" ] ; then
	hdw_arch_build="`uname -m -p | tr " " -`-linux-gnu"
else
	hdw_arch_build="`uname -m`-unknown-linux-gnu"
fi
case "$hdw_arch" in
	ia32) 	if [ -z "$hdw_arch_opt" ] ; then
			hdw_arch_target="i386-pc-linux-gnu"
		elif [ ! -z "$hdw_arch_opt" ] ; then
			hdw_arch_target="${hdw_arch_opt}-pc-linux-gnu"
			hdw_cflags="-march=${hdw_arch_opt}"
		fi
		hdw_arch_build=${hdw_arch_build//unknown/pc} ;;
	sparc*)	if [ -z "$hdw_arch_opt" ] ; then
			hdw_arch_target="$hdw_arch-unknown-linux-gnu"
		else
			# hack this! :)
			echo "pls hack sparc* opt. options and submit :)"
			echo "no optimization used!"
			hdw_arch_target="$hdw_arch-unknown-linux-gnu"
			hdw_cflags="-march={hdw_arch_opt}"
		fi ;;
	ppc)
		hdw_arch_target="powerpc-unknown-linux-gnu"
		[ ! -z "$hdw_arch_opt" ] && hdw_cflags="-march=${hdw_arch_opt}"
		hdw_arch_build=${hdw_arch_build//ppc/powerpc} ;;
	*)      echo "not supported yet"
		echo "please choose a valid optimization and build platform."
		exit 1 ;;
esac
# -O flag
[ ! -z "$hdw_opt" ] && hdw_cflags="-O${hdw_opt} $hdw_cflags"

# build tools to use
hdw_arch_prefix=""
if [ "$hdw_crossbuild" != "0" ] ; then
	hdw_arch_prefix="$hdw_arch_target-"
	if [ "$hdw_real_build" ] ; then
		if [ "$hdw_arch" = "ia32" ] ; then
		hdw_arch_build=${hdw_arch_build//$hdw_arch_opt/$hdw_real_build}
		else
		hdw_arch_build=${hdw_arch_build//$hdw_arch/$hdw_real_build}
		fi
	fi
fi
# test: actually we always use the compilers for target
# hdw_arch_prefix="$hdw_arch_target-"

# resume ...
echo "hdw_arch_target variable set to $hdw_arch_target"
echo "hdw_arch_build variable set to $hdw_arch_build"
echo "hdw_cflags variable set to $hdw_cflags"
[ "$hdw_status" = "1" ] && echo "hdw_stage1_prefix set to '$s1_prefix'"

# lets see what we are going to build
if [ -z $hdw_target ] ; then 
	echo "please set hdw_target in ./Config!"
	exit 1
elif [ ! -d ./targets/$hdw_target ] ; then 
	echo "please set _existing_ hdw_target in ./Config!"
	exit 1
else
	echo "hdw_target variable set to $hdw_target"
fi