- usethreads=$usethreads use5005threads=$use5005threads useithreads=$useithreads usemultiplicity=$usemultiplicity
- useperlio=$useperlio d_sfio=$d_sfio uselargefiles=$uselargefiles usesocks=$usesocks
- use64bitint=$use64bitint use64bitall=$use64bitall uselongdouble=$uselongdouble
- usemymalloc=$usemymalloc, bincompat5005=$d_bincompat5005
+ useithreads=$useithreads, usemultiplicity=$usemultiplicity
+ use64bitint=$use64bitint, use64bitall=$use64bitall, uselongdouble=$uselongdouble
+ usemymalloc=$usemymalloc, bincompat5005=undef