s |bool |vdie_common |NULLOK const char *message|STRLEN msglen\
|I32 utf8|bool warn
sr |char * |write_no_mem
-#if defined(PERL_MEM_LOG) && defined(PERL_MEM_LOG_STDERR)
+#if defined(PERL_MEM_LOG) && !defined(PERL_MEM_LOG_NOIMPL)
sn |void |mem_log_common |enum mem_log_type mlt|const UV n|const UV typesize \
|NN const char *type_name|NULLOK const SV *sv \
|Malloc_t oldalloc|Malloc_t newalloc \