AC_ARG_WITH(system_zlib,
	[  --with-system-zlib         use installed zlib library])

AC_ARG_WITH(zlib_libdir,
[  --with-zlib-libdir=DIR
                          Specify directory where the zlib.a resides.])

AC_ARG_WITH(zlib_include,
[  --with-zlib-include=DIR
                          Specify the zlib header files location.])
