diff -Nrup a/configure b/configure

--- a/configure	2019-08-24 19:04:36.000000000 -0600

+++ b/configure	2019-12-19 14:22:22.305194031 -0700

@@ -14479,7 +14479,7 @@ nocrash_init (void)

        float x = (float)1.2;

         float y = (float)1.3;

-        float fun () { return x*y; }

+        __attribute__ ((noinline,noclone) float fun () { return x*y; }

         int main()

         { nocrash_init();

          {int val = (* (int (*) ()) fun) ();

@@ -15364,7 +15364,7 @@ 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; then :

@@ -16534,8 +16534,8 @@ else

                         {

                           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;