Add fallback ncpu for all OSes.
It just returns a hard-coded value, but that should be good
enough for correctness.
@@ -3,6 +3,9 @@ lib thread =
hookstd.myr # install thread hooks
mutex.myr # fallback, for unimplemented platforms
+ #generic fallbacks
+ ncpu.myr
+
# linux impl of basic thread primitives
#condvar+linux.myr
mutex+linux.myr
