diff -Nrup a/configure b/configure
--- a/configure	2021-06-06 12:39:23.000000000 -0600
+++ b/configure	2021-06-11 11:36:25.646094447 -0600
@@ -20843,7 +20843,7 @@ fi
 
          mprotect_prog="$mprotect_prog"'
            char* area = (char*) malloc(6*pagesize);
-           char* fault_address = area + pagesize*7/2;
+           volatile char* fault_address = area + pagesize*7/2;
          '
          if test -z "$no_mprotect"; then
            if test "$cross_compiling" = yes
@@ -21675,8 +21675,8 @@ else $as_nop
                           {
                             unsigned int pagesize = getpagesize ();
                             int fd;
-                            char *pw;
-                            char *px;
+                            volatile char *pw;
+                            volatile char *px;
                             fd = open ("$filename", O_CREAT | O_RDWR | O_TRUNC, 0700);
                             if (fd < 0)
                               return 1;