--- gcc/config/xm-hp9k320.h	2018/04/24 16:53:27	1.1
+++ gcc/config/xm-hp9k320.h	2018/04/24 16:57:00	1.1.1.2
@@ -5,3 +5,9 @@
 #define bcopy(a,b,c) memcpy (b,a,c)
 #define bzero(a,b) memset (a,0,b)
 #define bcmp(a,b,c) memcmp (a,b,c)
+
+/* If compiling with HPUX compiler, we are probably using alloca.c,
+   so help it work right.  */
+#ifndef __GNUC__
+#define USE_C_ALLOCA
+#endif