If this is the first call to LBR$PUT_RECORD, this routine first
    writes a module header and returns its RFA to the 2-longword
    array pointed to by txtrfa. LBR$PUT_RECORD then writes the
    supplied data record to the library. On subsequent calls to
    LBR$PUT_RECORD, this routine writes the data record beginning
    at the next free location in the library (after the previous
    record). The last record written for the module should be
    followed by a call to LBR$PUT_END.