AC_ARG_ENABLE(zoom,[ --disable-zoom disable ZOOM (for old C++ compilers)],[enable_zoom=$enableval],[enable_zoom=yes])
AM_CONDITIONAL(ZOOM, test $enable_zoom = "yes")
AC_ARG_ENABLE(zoom,[ --disable-zoom disable ZOOM (for old C++ compilers)],[enable_zoom=$enableval],[enable_zoom=yes])
AM_CONDITIONAL(ZOOM, test $enable_zoom = "yes")