-# guess the current platform.
-IS_UNIX=$(uname | grep -i linux)
-if [ -z "$IS_UNIX" ]; then IS_UNIX=$(uname | grep -i unix); fi
-if [ -z "$IS_UNIX" ]; then IS_UNIX=$(uname | grep -i darwin); fi
-IS_DOS=$(uname | grep -i ming)
-if [ -z "$IS_DOS" ]; then IS_DOS=$(uname | grep -i cygwin); fi
-