+PERLVARI(G, my_cxt_index, int, 0)
+#endif
+
+/* this is currently set without MUTEX protection, so keep it a type which
+ * can be set atomically (ie not a bit field) */
+PERLVARI(G, veto_cleanup, int, FALSE) /* exit without cleanup */
+
+/*
+=for apidoc AmnUx|Perl_keyword_plugin_t|PL_keyword_plugin
+
+Function pointer, pointing at a function used to handle extended keywords.
+The function should be declared as
+
+ int keyword_plugin_function(pTHX_
+ char *keyword_ptr, STRLEN keyword_len,
+ OP **op_ptr)
+
+The function is called from the tokeniser, whenever a possible keyword
+is seen. C<keyword_ptr> points at the word in the parser's input
+buffer, and C<keyword_len> gives its length; it is not null-terminated.
+The function is expected to examine the word, and possibly other state
+such as L<%^H|perlvar/%^H>, to decide whether it wants to handle it
+as an extended keyword. If it does not, the function should return
+C<KEYWORD_PLUGIN_DECLINE>, and the normal parser process will continue.
+
+If the function wants to handle the keyword, it first must
+parse anything following the keyword that is part of the syntax
+introduced by the keyword. See L</Lexer interface> for details.
+
+When a keyword is being handled, the plugin function must build
+a tree of C<OP> structures, representing the code that was parsed.
+The root of the tree must be stored in C<*op_ptr>. The function then
+returns a constant indicating the syntactic role of the construct that
+it has parsed: C<KEYWORD_PLUGIN_STMT> if it is a complete statement, or
+C<KEYWORD_PLUGIN_EXPR> if it is an expression. Note that a statement
+construct cannot be used inside an expression (except via C<do BLOCK>
+and similar), and an expression is not a complete statement (it requires
+at least a terminating semicolon).
+
+When a keyword is handled, the plugin function may also have
+(compile-time) side effects. It may modify C<%^H>, define functions, and
+so on. Typically, if side effects are the main purpose of a handler,
+it does not wish to generate any ops to be included in the normal
+compilation. In this case it is still required to supply an op tree,
+but it suffices to generate a single null op.
+
+That's how the C<*PL_keyword_plugin> function needs to behave overall.
+Conventionally, however, one does not completely replace the existing
+handler function. Instead, take a copy of C<PL_keyword_plugin> before
+assigning your own function pointer to it. Your handler function should
+look for keywords that it is interested in and handle those. Where it
+is not interested, it should call the saved plugin function, passing on
+the arguments it received. Thus C<PL_keyword_plugin> actually points
+at a chain of handler functions, all of which have an opportunity to
+handle keywords, and only the last function in the chain (built into
+the Perl core) will normally return C<KEYWORD_PLUGIN_DECLINE>.
+
+For thread safety, modules should not set this variable directly.
+Instead, use the function L</wrap_keyword_plugin>.
+
+=cut
+*/
+
+#if defined(USE_ITHREADS)
+PERLVAR(G, keyword_plugin_mutex, perl_mutex) /* Mutex for PL_keyword_plugin */
+#endif
+PERLVARI(G, keyword_plugin, Perl_keyword_plugin_t, Perl_keyword_plugin_standard)
+
+PERLVARI(G, op_sequence, HV *, NULL) /* dump.c */
+PERLVARI(G, op_seq, UV, 0) /* dump.c */
+
+#ifdef USE_ITHREADS
+PERLVAR(G, dollarzero_mutex, perl_mutex) /* Modifying $0 */
+#endif
+
+/* Restricted hashes placeholder value.
+ In theory, the contents are never used, only the address.
+ In practice, &PL_sv_placeholder is returned by some APIs, and the calling
+ code is checking SvOK(). */
+
+PERLVAR(G, sv_placeholder, SV)
+
+#if defined(MYMALLOC) && defined(USE_ITHREADS)
+PERLVAR(G, malloc_mutex, perl_mutex) /* Mutex for malloc */
+#endif
+
+PERLVARI(G, hash_seed_set, bool, FALSE) /* perl.c */
+PERLVARA(G, hash_seed, PERL_HASH_SEED_BYTES, unsigned char) /* perl.c and hv.h */
+#if defined(PERL_HASH_STATE_BYTES)
+PERLVARA(G, hash_state, PERL_HASH_STATE_BYTES, unsigned char) /* perl.c and hv.h */
+#endif
+#if defined(PERL_USE_SINGLE_CHAR_HASH_CACHE)
+PERLVARA(G, hash_chars, (1+256) * sizeof(U32), unsigned char) /* perl.c and hv.h */
+#endif
+
+/* The path separator can vary depending on whether we're running under DCL or
+ * a Unix shell.
+ */
+#ifdef __VMS
+PERLVAR(G, perllib_sep, char)
+#endif
+
+PERLVAR(G, AboveLatin1, SV *)
+PERLVAR(G, Assigned_invlist, SV *)
+PERLVAR(G, GCB_invlist, SV *)
+PERLVAR(G, HasMultiCharFold, SV *)
+PERLVAR(G, InMultiCharFold, SV *)
+PERLVAR(G, Latin1, SV *)
+PERLVAR(G, LB_invlist, SV *)
+PERLVAR(G, NonFinalFold, SV *)
+PERLVAR(G, SB_invlist, SV *)
+PERLVAR(G, SCX_invlist, SV *)
+PERLVAR(G, UpperLatin1, SV *) /* Code points 128 - 255 */
+
+/* List of characters that participate in any fold defined by Unicode */
+PERLVAR(G, in_some_fold, SV *)
+
+PERLVAR(G, utf8_idcont, SV *)
+PERLVAR(G, utf8_idstart, SV *)
+PERLVAR(G, utf8_perl_idcont, SV *)
+PERLVAR(G, utf8_perl_idstart, SV *)
+PERLVAR(G, utf8_xidcont, SV *)
+PERLVAR(G, utf8_xidstart, SV *)
+PERLVAR(G, WB_invlist, SV *)
+PERLVARA(G, XPosix_ptrs, POSIX_CC_COUNT, SV *)
+PERLVARA(G, Posix_ptrs, POSIX_CC_COUNT, SV *)
+PERLVAR(G, utf8_toupper, SV *)
+PERLVAR(G, utf8_totitle, SV *)
+PERLVAR(G, utf8_tolower, SV *)
+PERLVAR(G, utf8_tofold, SV *)
+PERLVAR(G, utf8_tosimplefold, SV *)
+PERLVAR(G, utf8_charname_begin, SV *)
+PERLVAR(G, utf8_charname_continue, SV *)
+PERLVAR(G, utf8_mark, SV *)
+PERLVARI(G, InBitmap, SV *, NULL)
+PERLVAR(G, CCC_non0_non230, SV *)
+PERLVAR(G, Private_Use, SV *)
+
+/* Definitions of user-defined \p{} properties, as the subs that define them
+ * are only called once */
+PERLVARI(G, user_def_props, HV *, NULL)
+
+#if defined(USE_ITHREADS)
+PERLVAR(G, user_def_props_aTHX, PerlInterpreter *) /* aTHX that user_def_props
+ was defined in */
+PERLVAR(G, user_prop_mutex, perl_mutex) /* Mutex for manipulating
+ PL_user_defined_properties */
+#endif
+
+/* Everything that folds to a given character, for case insensitivity regex
+ * matching */
+PERLVAR(G, utf8_foldclosures, SV *)
+
+/* these record the best way to to perform certain IO operations while
+ * atomically setting FD_CLOEXEC. On the first call, a probe is done
+ * and the result recorded for use by subsequent calls.
+ * In theory these variables aren't thread-safe, but the worst that can
+ * happen is that two treads will both do an initial probe
+ */
+PERLVARI(G, strategy_dup, int, 0) /* doio.c */
+PERLVARI(G, strategy_dup2, int, 0) /* doio.c */
+PERLVARI(G, strategy_open, int, 0) /* doio.c */
+PERLVARI(G, strategy_open3, int, 0) /* doio.c */
+PERLVARI(G, strategy_mkstemp, int, 0) /* doio.c */
+PERLVARI(G, strategy_socket, int, 0) /* doio.c */
+PERLVARI(G, strategy_accept, int, 0) /* doio.c */
+PERLVARI(G, strategy_pipe, int, 0) /* doio.c */
+PERLVARI(G, strategy_socketpair, int, 0) /* doio.c */
+
+#ifdef PERL_IMPLICIT_CONTEXT
+# ifdef PERL_GLOBAL_STRUCT_PRIVATE
+/* per-module array of pointers to MY_CXT_KEY constants.
+ * It simulates each module having a static my_cxt_index var on builds
+ * which don't allow static vars */
+PERLVARI(G, my_cxt_keys, const char **, NULL)
+PERLVARI(G, my_cxt_keys_size, int, 0) /* size of PL_my_cxt_keys */
+# endif