--- configure.orig	2021-08-14 19:53:52 UTC
+++ configure
@@ -35665,7 +35665,7 @@ else $as_nop
       elxsi | \
       fr30 | \
       h8300 | \
-      i?86 | x86_64 | \
+      i?86 | x86_64 | amd64 | \
       i860 | \
       ia64 | \
       m32r | \
@@ -35714,7 +35714,7 @@ find_stack_direction (int *addr, int depth)
   return dir + dummy;
 }
 int
-main (int argc, char *argv)
+main (int argc, char *argv[])
 {
   printf ("%d\n", find_stack_direction (NULL, argc + 20));
   return 0;