macro_bool_to_01(BZIP2_FOUND HAVE_BZIP2_SUPPORT)
if(BZIP2_FOUND AND BZIP2_NEED_PREFIX)
    set(NEED_BZ2_PREFIX 1)
endif(BZIP2_FOUND AND BZIP2_NEED_PREFIX)

macro_bool_to_01(LIBLZMA_FOUND HAVE_XZ_SUPPORT)