On 17/12/2021 17:26, Dr. Arne Babenhauserheide wrote:
> The short of this: Call guile with --r7rs and the main incompatibility
> is missing reading of circular data structures with datum labels.
> 
> Best wishes,
> Arne

Well, Guile is also missing digit-value, which is easily mocked-up by using char->integer and subtracting 48 from it.