--- Top/threadsafe.c 2018-05-10 10:31:20.000000000 +0200 +++ Top/threadsafe.c 2018-05-13 10:45:03.246526895 +0200 @@ -551,6 +551,7 @@ csoundSpinLock(lock); *pval = val; csoundSpinUnLock(lock); + (void)x; } #endif }