+#if defined(PERL_IN_PP_SORT_C) || defined(PERL_DECL_PROT)
+#ifdef PERL_CORE
+#define sv_ncmp(a,b) S_sv_ncmp(aTHX_ a,b)
+#define sv_i_ncmp(a,b) S_sv_i_ncmp(aTHX_ a,b)
+#define amagic_ncmp(a,b) S_amagic_ncmp(aTHX_ a,b)
+#define amagic_i_ncmp(a,b) S_amagic_i_ncmp(aTHX_ a,b)
+#define amagic_cmp(a,b) S_amagic_cmp(aTHX_ a,b)
+#define amagic_cmp_locale(a,b) S_amagic_cmp_locale(aTHX_ a,b)
+#define sortcv(a,b) S_sortcv(aTHX_ a,b)
+#define sortcv_xsub(a,b) S_sortcv_xsub(aTHX_ a,b)
+#define sortcv_stacked(a,b) S_sortcv_stacked(aTHX_ a,b)
+#endif
+#endif