Only rank 0 reports debugging check activation.

examples/main.c

@@ -290,7 +290,8 @@ int main(int argc, char *argv[]) {
 
 /* Do we have debugging checks ? */
 #ifdef SWIFT_DEBUG_CHECKS
-  message("WARNING: Debugging checks activated. Code will be slower !");
+  if (myrank == 0)
+    message("WARNING: Debugging checks activated. Code will be slower !");
 #endif
 
   /* Do we choke on FP-exceptions ? */