df libstdc++.so fix

#!/bin/sh
DF_DIR=$(dirname "$0")
cd "${DF_DIR}"
export SDL_DISABLE_LOCK_KEYS=1 # Work around for bug in Debian/Ubuntu SDL patch.
#export SDL_VIDEO_CENTERED=1 # Centre the screen.  Messes up resizing.

# Find 64 bit library
LIBFILE="libstdc++.so.6"
for d in /lib64 /lib ; do
    if [ -e $d/$LIBFILE ]; then
        # Get the file that the symbolic link points to
        CXX_LIB=`readlink -f $d/$LIBFILE`
        CXX_LIB=`basename $CXX_LIB`
        VER=`echo $CXX_LIB | sed -e 's/^.*\.so.//'`
        break
    fi
done

case $VER in
    6.0.2[2-9]|6.0.3[0-9]|6.1.*)
        # Nothing to do, the system C++ lib is one we can link against.
        echo Using system libstdc++ library, version $VER
        ;;

    *)
        # Either we can't find the system C++ lib or it's of a version we can't link against,
        # so use the library that shipped with us
        echo Using bundled libstdc++ library
        export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:./c_lib
        ;;
esac

./libs/Dwarf_Fortress "$@" # Go, go, go! :)