diff -up firefox-68.0.2/js/src/jit/AtomicOperations.h.jit-atomic-lucky firefox-60.5.0/js/src/jit/AtomicOperations.h
--- firefox-68.0.2/js/src/jit/AtomicOperations.h.jit-atomic-lucky	2019-01-22 10:20:27.993697161 +0100
+++ firefox-68.0.2/js/src/jit/AtomicOperations.h	2019-01-22 10:23:15.337873762 +0100
@@ -394,7 +394,7 @@
     defined(__sh__) || defined(__s390__) || defined(__s390x__)
 #  include "jit/shared/AtomicOperations-feeling-lucky.h"
 #else
-#  error "No AtomicOperations support provided for this platform"
+#include "jit/none/AtomicOperations-feeling-lucky.h"
 #endif
 
 #endif  // jit_AtomicOperations_h