#define PERLIO_LAYERS 1
extern void PerlIO_define_layer (pTHX_ PerlIO_funcs *tab);
-extern SV * PerlIO_find_layer (pTHX_ const char *name, STRLEN len);
+extern SV * PerlIO_find_layer (pTHX_ const char *name, STRLEN len, int load);
extern PerlIO * PerlIO_push (pTHX_ PerlIO *f,PerlIO_funcs *tab,const char *mode,SV *arg);
extern void PerlIO_pop (pTHX_ PerlIO *f);