I don't know if these functions might be obsolete, but here's a simple patch to add the missing prototypes if they are not.
Fixes this warning: register.c:429: warning: no previous prototype for `Parrot_push_on_stack' register.c:436: warning: no previous prototype for `Parrot_pop_off_stack' Index: include/parrot/register.h =================================================================== RCS file: /home/perlcvs/parrot/include/parrot/register.h,v retrieving revision 1.8 diff -u -r1.8 register.h --- include/parrot/register.h 22 Oct 2001 18:02:24 -0000 1.8 +++ include/parrot/register.h 1 Jan 2002 19:29:06 -0000 @@ -90,6 +90,8 @@ void Parrot_pop_s(struct Parrot_Interp *); void Parrot_pop_p(struct Parrot_Interp *); +void Parrot_push_on_stack(void *thing, INTVAL size, INTVAL type); +void Parrot_pop_off_stack(void *thing, INTVAL type); #endif /* PARROT_REGISTER_H */