configure: disallow "--with-trace-refs"

The tracing references feature is not thread-safe without the GIL. I think it's possible to get the same functionality in a thread-safe way by traversing the mimalloc heaps (like we do in the garbage collector), but that's not currently implemented.
colesbury · Mar 6, 2023 · cefe5df · cefe5df
1 parent 7cc3588
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diff --git a/configure b/configure
diff --git a/configure.ac b/configure.ac
@@ -1669,6 +1669,7 @@ AC_MSG_RESULT($with_trace_refs)
 
 if test "$with_trace_refs" = "yes"
 then
+  AC_MSG_ERROR([--with-trace-refs is not supported in nogil mode])
   AC_DEFINE(Py_TRACE_REFS, 1, [Define if you want to enable tracing references for debugging purpose])
 fi