--- gcc/config/xm-irix4.h	2018/04/24 17:51:33	1.1
+++ gcc/config/xm-irix4.h	2018/04/24 17:59:10	1.1.1.2
@@ -1,18 +1,18 @@
-/* Tell xm-mips.h not to do anything about alloca.  */
-#define MIPS_OVERRIDE_ALLOCA
-
 #include "xm-mips.h"
 
 #define USG
+#define HAVE_VPRINTF
 
 #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 0
 #ifdef __GNUC__
-/* If compiling with GCC, use the built-in alloca.  */
-#define alloca(n) __builtin_alloca (n)
-#else
-/* The normal irix compiler requires alloca.h or alloca doesn't work.  */
+/* The normal irix compiler requires alloca.h or alloca doesn't work.
+   However, the IRIX compiler doesn't allow alloca to be stored in
+   something like ptr->field = alloca(), so we just use the normal
+   C alloca.  */
 #include <alloca.h>
 #endif
+#endif