#define is_utf8_char Perl_is_utf8_char
#define is_utf8_string Perl_is_utf8_string
#define is_utf8_string_loc Perl_is_utf8_string_loc
+#define is_utf8_string_loclen Perl_is_utf8_string_loclen
#define is_utf8_alnum Perl_is_utf8_alnum
#define is_utf8_alnumc Perl_is_utf8_alnumc
#define is_utf8_idfirst Perl_is_utf8_idfirst
#define magic_set Perl_magic_set
#define magic_setamagic Perl_magic_setamagic
#define magic_setarylen Perl_magic_setarylen
+#define magic_freearylen_p Perl_magic_freearylen_p
#define magic_setbm Perl_magic_setbm
#define magic_setdbline Perl_magic_setdbline
#define magic_setdefelem Perl_magic_setdefelem
#define sortsv Perl_sortsv
#define mg_clear Perl_mg_clear
#define mg_copy Perl_mg_copy
+#ifdef PERL_CORE
+#define mg_localize Perl_mg_localize
+#endif
#define mg_find Perl_mg_find
#define mg_free Perl_mg_free
#define mg_get Perl_mg_get
#define newSVnv Perl_newSVnv
#define newSVpv Perl_newSVpv
#define newSVpvn Perl_newSVpvn
+#define newSVhek Perl_newSVhek
#define newSVpvn_share Perl_newSVpvn_share
#define newSVpvf Perl_newSVpvf
#define vnewSVpvf Perl_vnewSVpvf
#define scan_version Perl_scan_version
#define new_version Perl_new_version
#define upg_version Perl_upg_version
+#define vverify Perl_vverify
#define vnumify Perl_vnumify
#define vnormal Perl_vnormal
#define vstringify Perl_vstringify
#endif
#endif
#define savepv Perl_savepv
-#define savesharedpv Perl_savesharedpv
#define savepvn Perl_savepvn
+#define savesharedpv Perl_savesharedpv
+#define savesvpv Perl_savesvpv
#define savestack_grow Perl_savestack_grow
#define savestack_grow_cnt Perl_savestack_grow_cnt
#define save_aelem Perl_save_aelem
#endif
#ifdef PERL_CORE
#define setdefout Perl_setdefout
+#endif
#define share_hek Perl_share_hek
+#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
+#ifdef PERL_CORE
+#define sighandler Perl_sighandler
+#endif
+#define csighandler Perl_csighandler
+#else
+#ifdef PERL_CORE
#define sighandler Perl_sighandler
#endif
#define csighandler Perl_csighandler
+#endif
#define stack_grow Perl_stack_grow
#define start_subparse Perl_start_subparse
#ifdef PERL_CORE
#endif
#define custom_op_name Perl_custom_op_name
#define custom_op_desc Perl_custom_op_desc
-#if defined(PERL_COPY_ON_WRITE)
+#if defined(PERL_OLD_COPY_ON_WRITE)
#ifdef PERL_CORE
#define sv_release_IVX Perl_sv_release_IVX
#endif
#define hsplit S_hsplit
#define hfreeentries S_hfreeentries
#define new_he S_new_he
-#define del_he S_del_he
#define save_hek_flags S_save_hek_flags
#define hv_magic_check S_hv_magic_check
#define unshare_hek_or_pvn S_unshare_hek_or_pvn
#define share_hek_flags S_share_hek_flags
#define hv_notallowed S_hv_notallowed
+#define hv_auxinit S_hv_auxinit
+#define hv_delete_common S_hv_delete_common
+#define hv_fetch_common S_hv_fetch_common
#endif
#endif
#if defined(PERL_IN_MG_C) || defined(PERL_DECL_PROT)
#define save_magic S_save_magic
#define magic_methpack S_magic_methpack
#define magic_methcall S_magic_methcall
+#define restore_magic S_restore_magic
+#define unwind_handler_stack S_unwind_handler_stack
#endif
#endif
#if defined(PERL_IN_OP_C) || defined(PERL_DECL_PROT)
#define div128 S_div128
#define group_end S_group_end
#define get_num S_get_num
+#define need_utf8 S_need_utf8
+#define first_symbol S_first_symbol
#endif
#endif
#if defined(PERL_IN_PP_CTL_C) || defined(PERL_DECL_PROT)
#define save_scalar_at S_save_scalar_at
#endif
#endif
+#if defined(PERL_IN_GV_C) || defined(PERL_IN_SV_C) || defined(PERL_IN_PAD_C) || defined(PERL_DECL_PROT)
+#endif
#if defined(PERL_IN_SV_C) || defined(PERL_DECL_PROT)
#ifdef PERL_CORE
+#define uiv_2buf S_uiv_2buf
#define asIV S_asIV
#define asUV S_asUV
-#define new_xnv S_new_xnv
-#define new_xpv S_new_xpv
-#define new_xpviv S_new_xpviv
-#define new_xpvnv S_new_xpvnv
-#define new_xpvcv S_new_xpvcv
-#define new_xpvav S_new_xpvav
-#define new_xpvhv S_new_xpvhv
-#define new_xpvmg S_new_xpvmg
-#define new_xpvgv S_new_xpvgv
-#define new_xpvlv S_new_xpvlv
-#define new_xpvbm S_new_xpvbm
-#define del_xnv S_del_xnv
-#define del_xpv S_del_xpv
-#define del_xpviv S_del_xpviv
-#define del_xpvnv S_del_xpvnv
-#define del_xpvcv S_del_xpvcv
-#define del_xpvav S_del_xpvav
-#define del_xpvhv S_del_xpvhv
-#define del_xpvmg S_del_xpvmg
-#define del_xpvgv S_del_xpvgv
-#define del_xpvlv S_del_xpvlv
-#define del_xpvbm S_del_xpvbm
#define sv_unglob S_sv_unglob
#define not_a_number S_not_a_number
#define visit S_visit
-#define sv_add_backref S_sv_add_backref
#define sv_del_backref S_sv_del_backref
#define varname S_varname
#endif
#ifdef PERL_CORE
#define expect_number S_expect_number
#endif
-# if defined(USE_ITHREADS)
-#ifdef PERL_CORE
-#define gv_share S_gv_share
-#endif
-# endif
#ifdef PERL_CORE
#define utf8_mg_pos S_utf8_mg_pos
#define utf8_mg_pos_init S_utf8_mg_pos_init
#endif
-#if defined(PERL_COPY_ON_WRITE)
+#if defined(PERL_OLD_COPY_ON_WRITE)
#ifdef PERL_CORE
#define sv_release_COW S_sv_release_COW
#endif
#define sublex_start S_sublex_start
#define filter_gets S_filter_gets
#define find_in_my_stash S_find_in_my_stash
+#define tokenize_use S_tokenize_use
#define new_constant S_new_constant
#endif
# if defined(DEBUGGING)
#define depcom S_depcom
#define incl_perldb S_incl_perldb
#endif
-#if 0
-#ifdef PERL_CORE
-#define utf16_textfilter S_utf16_textfilter
-#define utf16rev_textfilter S_utf16rev_textfilter
-#endif
-#endif
# if defined(PERL_CR_FILTER)
#ifdef PERL_CORE
#define cr_textfilter S_cr_textfilter
#ifdef PERL_CORE
#define closest_cop S_closest_cop
#define mess_alloc S_mess_alloc
+#define vdie_croak_common S_vdie_croak_common
+#define vdie_common S_vdie_common
#endif
#endif
#if defined(PERL_IN_NUMERIC_C) || defined(PERL_DECL_PROT)
#define mulexp10 S_mulexp10
#endif
#endif
+#if defined(PERL_IN_UTF8_C) || defined(PERL_DECL_PROT)
+#ifdef PERL_CORE
+#define is_utf8_char_slow S_is_utf8_char_slow
+#endif
+#endif
#define sv_setsv_flags Perl_sv_setsv_flags
#define sv_catpvn_flags Perl_sv_catpvn_flags
#define sv_catsv_flags Perl_sv_catsv_flags
#define sv_copypv Perl_sv_copypv
#define my_atof2 Perl_my_atof2
#define my_socketpair Perl_my_socketpair
-#ifdef PERL_COPY_ON_WRITE
+#ifdef PERL_OLD_COPY_ON_WRITE
#if defined(PERL_CORE) || defined(PERL_EXT)
#define sv_setsv_cow Perl_sv_setsv_cow
#endif
#endif
#endif
#define save_set_svflags Perl_save_set_svflags
-#if defined(PERL_IN_HV_C) || defined(PERL_DECL_PROT)
-#ifdef PERL_CORE
-#define hv_delete_common S_hv_delete_common
-#define hv_fetch_common S_hv_fetch_common
-#endif
-#endif
-#define hv_clear_placeholders Perl_hv_clear_placeholders
#define hv_scalar Perl_hv_scalar
+#define hv_clear_placeholders Perl_hv_clear_placeholders
#ifdef PERL_CORE
#define magic_scalarpack Perl_magic_scalarpack
#endif
#ifdef PERL_CORE
#define is_gv_magical_sv Perl_is_gv_magical_sv
#endif
-#define savesvpv Perl_savesvpv
+#define stashpv_hvname_match Perl_stashpv_hvname_match
+#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
+#ifdef PERL_CORE
+#define dump_sv_child Perl_dump_sv_child
+#endif
+#endif
+#ifdef PERL_DONT_CREATE_GVSV
+#define gv_SVadd Perl_gv_SVadd
+#endif
+#ifdef PERL_CORE
+#define offer_nice_chunk Perl_offer_nice_chunk
+#endif
#define ck_anoncode Perl_ck_anoncode
#define ck_bitop Perl_ck_bitop
#define ck_concat Perl_ck_concat
#define is_utf8_char(a) Perl_is_utf8_char(aTHX_ a)
#define is_utf8_string(a,b) Perl_is_utf8_string(aTHX_ a,b)
#define is_utf8_string_loc(a,b,c) Perl_is_utf8_string_loc(aTHX_ a,b,c)
+#define is_utf8_string_loclen(a,b,c,d) Perl_is_utf8_string_loclen(aTHX_ a,b,c,d)
#define is_utf8_alnum(a) Perl_is_utf8_alnum(aTHX_ a)
#define is_utf8_alnumc(a) Perl_is_utf8_alnumc(aTHX_ a)
#define is_utf8_idfirst(a) Perl_is_utf8_idfirst(aTHX_ a)
#define magic_set(a,b) Perl_magic_set(aTHX_ a,b)
#define magic_setamagic(a,b) Perl_magic_setamagic(aTHX_ a,b)
#define magic_setarylen(a,b) Perl_magic_setarylen(aTHX_ a,b)
+#define magic_freearylen_p(a,b) Perl_magic_freearylen_p(aTHX_ a,b)
#define magic_setbm(a,b) Perl_magic_setbm(aTHX_ a,b)
#define magic_setdbline(a,b) Perl_magic_setdbline(aTHX_ a,b)
#define magic_setdefelem(a,b) Perl_magic_setdefelem(aTHX_ a,b)
#define sortsv(a,b,c) Perl_sortsv(aTHX_ a,b,c)
#define mg_clear(a) Perl_mg_clear(aTHX_ a)
#define mg_copy(a,b,c,d) Perl_mg_copy(aTHX_ a,b,c,d)
+#ifdef PERL_CORE
+#define mg_localize(a,b) Perl_mg_localize(aTHX_ a,b)
+#endif
#define mg_find(a,b) Perl_mg_find(aTHX_ a,b)
#define mg_free(a) Perl_mg_free(aTHX_ a)
#define mg_get(a) Perl_mg_get(aTHX_ a)
#define newSVnv(a) Perl_newSVnv(aTHX_ a)
#define newSVpv(a,b) Perl_newSVpv(aTHX_ a,b)
#define newSVpvn(a,b) Perl_newSVpvn(aTHX_ a,b)
+#define newSVhek(a) Perl_newSVhek(aTHX_ a)
#define newSVpvn_share(a,b,c) Perl_newSVpvn_share(aTHX_ a,b,c)
#define vnewSVpvf(a,b) Perl_vnewSVpvf(aTHX_ a,b)
#define newSVrv(a,b) Perl_newSVrv(aTHX_ a,b)
#define scan_version(a,b,c) Perl_scan_version(aTHX_ a,b,c)
#define new_version(a) Perl_new_version(aTHX_ a)
#define upg_version(a) Perl_upg_version(aTHX_ a)
+#define vverify(a) Perl_vverify(aTHX_ a)
#define vnumify(a) Perl_vnumify(aTHX_ a)
#define vnormal(a) Perl_vnormal(aTHX_ a)
#define vstringify(a) Perl_vstringify(aTHX_ a)
#endif
#endif
#define savepv(a) Perl_savepv(aTHX_ a)
-#define savesharedpv(a) Perl_savesharedpv(aTHX_ a)
#define savepvn(a,b) Perl_savepvn(aTHX_ a,b)
+#define savesharedpv(a) Perl_savesharedpv(aTHX_ a)
+#define savesvpv(a) Perl_savesvpv(aTHX_ a)
#define savestack_grow() Perl_savestack_grow(aTHX)
#define savestack_grow_cnt(a) Perl_savestack_grow_cnt(aTHX_ a)
#define save_aelem(a,b,c) Perl_save_aelem(aTHX_ a,b,c)
#endif
#ifdef PERL_CORE
#define setdefout(a) Perl_setdefout(aTHX_ a)
+#endif
#define share_hek(a,b,c) Perl_share_hek(aTHX_ a,b,c)
+#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
+#ifdef PERL_CORE
+#endif
+#else
+#ifdef PERL_CORE
#define sighandler Perl_sighandler
#endif
#define csighandler Perl_csighandler
+#endif
#define stack_grow(a,b,c) Perl_stack_grow(aTHX_ a,b,c)
#define start_subparse(a,b) Perl_start_subparse(aTHX_ a,b)
#ifdef PERL_CORE
#endif
#define custom_op_name(a) Perl_custom_op_name(aTHX_ a)
#define custom_op_desc(a) Perl_custom_op_desc(aTHX_ a)
-#if defined(PERL_COPY_ON_WRITE)
+#if defined(PERL_OLD_COPY_ON_WRITE)
#ifdef PERL_CORE
#define sv_release_IVX(a) Perl_sv_release_IVX(aTHX_ a)
#endif
#define hsplit(a) S_hsplit(aTHX_ a)
#define hfreeentries(a) S_hfreeentries(aTHX_ a)
#define new_he() S_new_he(aTHX)
-#define del_he(a) S_del_he(aTHX_ a)
#define save_hek_flags(a,b,c,d) S_save_hek_flags(aTHX_ a,b,c,d)
#define hv_magic_check(a,b,c) S_hv_magic_check(aTHX_ a,b,c)
#define unshare_hek_or_pvn(a,b,c,d) S_unshare_hek_or_pvn(aTHX_ a,b,c,d)
#define share_hek_flags(a,b,c,d) S_share_hek_flags(aTHX_ a,b,c,d)
#define hv_notallowed(a,b,c,d) S_hv_notallowed(aTHX_ a,b,c,d)
+#define hv_auxinit(a) S_hv_auxinit(aTHX_ a)
+#define hv_delete_common(a,b,c,d,e,f,g) S_hv_delete_common(aTHX_ a,b,c,d,e,f,g)
+#define hv_fetch_common(a,b,c,d,e,f,g,h) S_hv_fetch_common(aTHX_ a,b,c,d,e,f,g,h)
#endif
#endif
#if defined(PERL_IN_MG_C) || defined(PERL_DECL_PROT)
#define save_magic(a,b) S_save_magic(aTHX_ a,b)
#define magic_methpack(a,b,c) S_magic_methpack(aTHX_ a,b,c)
#define magic_methcall(a,b,c,d,e,f) S_magic_methcall(aTHX_ a,b,c,d,e,f)
+#define restore_magic(a) S_restore_magic(aTHX_ a)
+#define unwind_handler_stack(a) S_unwind_handler_stack(aTHX_ a)
#endif
#endif
#if defined(PERL_IN_OP_C) || defined(PERL_DECL_PROT)
#define div128(a,b) S_div128(aTHX_ a,b)
#define group_end(a,b,c) S_group_end(aTHX_ a,b,c)
#define get_num(a,b) S_get_num(aTHX_ a,b)
+#define need_utf8 S_need_utf8
+#define first_symbol S_first_symbol
#endif
#endif
#if defined(PERL_IN_PP_CTL_C) || defined(PERL_DECL_PROT)
#define save_scalar_at(a) S_save_scalar_at(aTHX_ a)
#endif
#endif
+#if defined(PERL_IN_GV_C) || defined(PERL_IN_SV_C) || defined(PERL_IN_PAD_C) || defined(PERL_DECL_PROT)
+#ifdef PERL_CORE
+#endif
+#endif
#if defined(PERL_IN_SV_C) || defined(PERL_DECL_PROT)
#ifdef PERL_CORE
+#define uiv_2buf S_uiv_2buf
#define asIV(a) S_asIV(aTHX_ a)
#define asUV(a) S_asUV(aTHX_ a)
-#define new_xnv() S_new_xnv(aTHX)
-#define new_xpv() S_new_xpv(aTHX)
-#define new_xpviv() S_new_xpviv(aTHX)
-#define new_xpvnv() S_new_xpvnv(aTHX)
-#define new_xpvcv() S_new_xpvcv(aTHX)
-#define new_xpvav() S_new_xpvav(aTHX)
-#define new_xpvhv() S_new_xpvhv(aTHX)
-#define new_xpvmg() S_new_xpvmg(aTHX)
-#define new_xpvgv() S_new_xpvgv(aTHX)
-#define new_xpvlv() S_new_xpvlv(aTHX)
-#define new_xpvbm() S_new_xpvbm(aTHX)
-#define del_xnv(a) S_del_xnv(aTHX_ a)
-#define del_xpv(a) S_del_xpv(aTHX_ a)
-#define del_xpviv(a) S_del_xpviv(aTHX_ a)
-#define del_xpvnv(a) S_del_xpvnv(aTHX_ a)
-#define del_xpvcv(a) S_del_xpvcv(aTHX_ a)
-#define del_xpvav(a) S_del_xpvav(aTHX_ a)
-#define del_xpvhv(a) S_del_xpvhv(aTHX_ a)
-#define del_xpvmg(a) S_del_xpvmg(aTHX_ a)
-#define del_xpvgv(a) S_del_xpvgv(aTHX_ a)
-#define del_xpvlv(a) S_del_xpvlv(aTHX_ a)
-#define del_xpvbm(a) S_del_xpvbm(aTHX_ a)
#define sv_unglob(a) S_sv_unglob(aTHX_ a)
#define not_a_number(a) S_not_a_number(aTHX_ a)
#define visit(a,b,c) S_visit(aTHX_ a,b,c)
-#define sv_add_backref(a,b) S_sv_add_backref(aTHX_ a,b)
-#define sv_del_backref(a) S_sv_del_backref(aTHX_ a)
+#define sv_del_backref(a,b) S_sv_del_backref(aTHX_ a,b)
#define varname(a,b,c,d,e,f) S_varname(aTHX_ a,b,c,d,e,f)
#endif
# ifdef DEBUGGING
#ifdef PERL_CORE
#define expect_number(a) S_expect_number(aTHX_ a)
#endif
-# if defined(USE_ITHREADS)
-#ifdef PERL_CORE
-#define gv_share(a,b) S_gv_share(aTHX_ a,b)
-#endif
-# endif
#ifdef PERL_CORE
#define utf8_mg_pos(a,b,c,d,e,f,g,h,i) S_utf8_mg_pos(aTHX_ a,b,c,d,e,f,g,h,i)
#define utf8_mg_pos_init(a,b,c,d,e,f,g) S_utf8_mg_pos_init(aTHX_ a,b,c,d,e,f,g)
#endif
-#if defined(PERL_COPY_ON_WRITE)
+#if defined(PERL_OLD_COPY_ON_WRITE)
#ifdef PERL_CORE
-#define sv_release_COW(a,b,c,d,e,f) S_sv_release_COW(aTHX_ a,b,c,d,e,f)
+#define sv_release_COW(a,b,c,d) S_sv_release_COW(aTHX_ a,b,c,d)
#endif
#endif
#endif
#define sublex_start() S_sublex_start(aTHX)
#define filter_gets(a,b,c) S_filter_gets(aTHX_ a,b,c)
#define find_in_my_stash(a,b) S_find_in_my_stash(aTHX_ a,b)
+#define tokenize_use(a,b) S_tokenize_use(aTHX_ a,b)
#define new_constant(a,b,c,d,e,f) S_new_constant(aTHX_ a,b,c,d,e,f)
#endif
# if defined(DEBUGGING)
#define depcom() S_depcom(aTHX)
#define incl_perldb() S_incl_perldb(aTHX)
#endif
-#if 0
-#ifdef PERL_CORE
-#define utf16_textfilter(a,b,c) S_utf16_textfilter(aTHX_ a,b,c)
-#define utf16rev_textfilter(a,b,c) S_utf16rev_textfilter(aTHX_ a,b,c)
-#endif
-#endif
# if defined(PERL_CR_FILTER)
#ifdef PERL_CORE
#define cr_textfilter(a,b,c) S_cr_textfilter(aTHX_ a,b,c)
#ifdef PERL_CORE
#define closest_cop(a,b) S_closest_cop(aTHX_ a,b)
#define mess_alloc() S_mess_alloc(aTHX)
+#define vdie_croak_common(a,b,c,d) S_vdie_croak_common(aTHX_ a,b,c,d)
+#define vdie_common(a,b,c) S_vdie_common(aTHX_ a,b,c)
#endif
#endif
#if defined(PERL_IN_NUMERIC_C) || defined(PERL_DECL_PROT)
#define mulexp10 S_mulexp10
#endif
#endif
+#if defined(PERL_IN_UTF8_C) || defined(PERL_DECL_PROT)
+#ifdef PERL_CORE
+#define is_utf8_char_slow(a,b) S_is_utf8_char_slow(aTHX_ a,b)
+#endif
+#endif
#define sv_setsv_flags(a,b,c) Perl_sv_setsv_flags(aTHX_ a,b,c)
#define sv_catpvn_flags(a,b,c,d) Perl_sv_catpvn_flags(aTHX_ a,b,c,d)
#define sv_catsv_flags(a,b,c) Perl_sv_catsv_flags(aTHX_ a,b,c)
#define sv_copypv(a,b) Perl_sv_copypv(aTHX_ a,b)
#define my_atof2(a,b) Perl_my_atof2(aTHX_ a,b)
#define my_socketpair Perl_my_socketpair
-#ifdef PERL_COPY_ON_WRITE
+#ifdef PERL_OLD_COPY_ON_WRITE
#if defined(PERL_CORE) || defined(PERL_EXT)
#define sv_setsv_cow(a,b) Perl_sv_setsv_cow(aTHX_ a,b)
#endif
#endif
#endif
#define save_set_svflags(a,b,c) Perl_save_set_svflags(aTHX_ a,b,c)
-#if defined(PERL_IN_HV_C) || defined(PERL_DECL_PROT)
-#ifdef PERL_CORE
-#define hv_delete_common(a,b,c,d,e,f,g) S_hv_delete_common(aTHX_ a,b,c,d,e,f,g)
-#define hv_fetch_common(a,b,c,d,e,f,g,h) S_hv_fetch_common(aTHX_ a,b,c,d,e,f,g,h)
-#endif
-#endif
-#define hv_clear_placeholders(a) Perl_hv_clear_placeholders(aTHX_ a)
#define hv_scalar(a) Perl_hv_scalar(aTHX_ a)
+#define hv_clear_placeholders(a) Perl_hv_clear_placeholders(aTHX_ a)
#ifdef PERL_CORE
#define magic_scalarpack(a,b) Perl_magic_scalarpack(aTHX_ a,b)
#endif
#ifdef PERL_CORE
#define is_gv_magical_sv(a,b) Perl_is_gv_magical_sv(aTHX_ a,b)
#endif
-#define savesvpv(a) Perl_savesvpv(aTHX_ a)
+#define stashpv_hvname_match(a,b) Perl_stashpv_hvname_match(aTHX_ a,b)
+#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
+#ifdef PERL_CORE
+#define dump_sv_child(a) Perl_dump_sv_child(aTHX_ a)
+#endif
+#endif
+#ifdef PERL_DONT_CREATE_GVSV
+#define gv_SVadd(a) Perl_gv_SVadd(aTHX_ a)
+#endif
+#ifdef PERL_CORE
+#define offer_nice_chunk(a,b) Perl_offer_nice_chunk(aTHX_ a,b)
+#endif
#define ck_anoncode(a) Perl_ck_anoncode(aTHX_ a)
#define ck_bitop(a) Perl_ck_bitop(aTHX_ a)
#define ck_concat(a) Perl_ck_concat(aTHX_ a)