/* TICKY_TICKY needs EAGER_BLACKHOLING to verify no double-entries of
* single-entry thunks.
- *
- * SMP needs EAGER_BLACKHOLING because it has to lock thunks
- * synchronously, in case another thread is trying to evaluate the
- * same thunk simultaneously.
*/
-#if defined(SMP) || defined(TICKY_TICKY)
+/* #if defined(TICKY_TICKY) || defined(THREADED_RTS) */
+#if defined(TICKY_TICKY)
# define EAGER_BLACKHOLING
#else
# define LAZY_BLACKHOLING
#define RET_LBL(f) f##_ret
#endif
+/* -----------------------------------------------------------------------------
+ Signals - supported on non-PAR versions of the runtime. See RtsSignals.h.
+ -------------------------------------------------------------------------- */
+
+#if !defined(PAR)
+#define RTS_USER_SIGNALS 1
+#endif
+
#endif /* RTSCONFIG_H */