#!/bin/sh

echo 'configuring kdtree ...'

PREFIX=/usr/local
OPT=yes
DBG=yes
FALLOC=yes
PTHREAD=yes

for arg; do
	case "$arg" in
	--prefix=*)
		value=`echo $arg | sed 's/--prefix=//'`
		PREFIX=${value:-$prefix}
		;;
	
	--enable-opt)
		OPT=yes;;
	--disable-opt)
		OPT=no;;

	--enable-debug)
		DBG=yes;;
	--disable-debug)
		DBG=no;;
	
	--enable-pthread)
		PTHREAD=yes;;
	--disable-pthread)
		PTHREAD=no;;

	--enable-fastalloc)
		FALLOC=yes;;
	--disable-fastalloc)
		FALLOC=no;;

	--help)
		echo 'usage: ./configure [options]'
		echo 'options:'
		echo '  --prefix=<path>: installation path (default: /usr/local)'
		echo '  --enable-fastalloc: enable fast result node allocator (default)'
		echo '  --disable-fastalloc: disable fast result node allocator'
		echo '  --enable-pthread: enable pthread support (default if fastalloc is enabled)'
		echo "  --disable-pthread: disable pthread support (don't)"
		echo '  --enable-opt: enable speed optimizations (default)'
		echo '  --disable-opt: disable speed optimizations'
		echo '  --enable-debug: include debugging symbols (default)'
		echo '  --disable-debug: do not include debugging symbols'
		echo 'all invalid options are silently ignored'
		exit 0
		;;
	esac
done

echo "prefix: $PREFIX"
echo "optimize for speed: $OPT"
echo "include debugging symbols: $DBG"
echo "fast node allocator: $FALLOC"
if [ "$FALLOC" = "yes" ]; then
	echo "pthread support: $PTHREAD"
fi

# create makefile
echo 'creating makefile ...'
echo "PREFIX = $PREFIX" >Makefile
if [ "$DBG" = 'yes' ]; then
	echo 'dbg = -g' >>Makefile
fi
if [ "$OPT" = 'yes' ]; then
	echo 'opt = -O3' >>Makefile
fi
if [ "$FALLOC" = 'yes' ]; then
	echo 'falloc = -DUSE_LIST_NODE_ALLOCATOR' >>Makefile
fi
if [ "$PTHREAD" = 'no' ]; then
	echo 'pthreads = -DNO_PTHREADS' >>Makefile
else
	echo 'ldpthread = -lpthread' >>Makefile
fi

if [ "`uname -s`" = Darwin ]; then
	echo 'shared = -dynamiclib' >>Makefile
	echo 'so_suffix = dylib' >>Makefile
else
	echo 'shared = -shared' >>Makefile
	echo 'so_suffix = so' >>Makefile
fi

if [ "`uname -s`" != MINGW32 ]; then
	echo 'pic = -fPIC' >>Makefile
fi

cat Makefile.in >>Makefile

echo 'configuration completed, type make (or gmake) to build.'