(At least PerlIO/via uses it, so it must be public)
p4raw-id: //depot/perl@25058
#ifdef PERL_DONT_CREATE_GVSV
Ap |GV* |gv_SVadd |NN GV* gv
#endif
-po |bool |ckwarn |U32 w
-po |bool |ckwarn_d |U32 w
+Apo |bool |ckwarn |U32 w
+Apo |bool |ckwarn_d |U32 w
p |void |offer_nice_chunk |NN void *chunk|U32 chunk_size