--- a/src/hotspot/share/runtime/os.cpp	Thu Jan 14 11:21:25 2021
+++ b/src/hotspot/share/runtime/os.cpp	Thu Jan 14 11:44:00 2021
@@ -85,6 +85,7 @@
 # include <poll.h>
 #endif
 
+# include <alloca.h>
 # include <errno.h>
 # include <signal.h>