: x not exported
: X explicitly exported
: M may change
-: E visible to Perl core extensions
+: E visible to extensions included in the Perl core
: b binary backward compatibility; function is a macro
: but has also Perl_ implementation (which is exported)
:
#if defined(DEBUGGING)
p |int |get_debug_opts |char **s
#endif
+Ap |void |save_set_svflags|SV* sv|U32 mask|U32 val