diff -Nrup a/gnulib/import/m4/alloca.m4 b/gnulib/import/m4/alloca.m4
--- a/gnulib/import/m4/alloca.m4	2019-11-18 18:49:20.000000000 -0700
+++ b/gnulib/import/m4/alloca.m4	2020-01-11 01:07:36.200483085 -0700
@@ -89,7 +89,7 @@ AC_CACHE_CHECK([stack direction for C al
                [ac_cv_c_stack_direction],
 [AC_RUN_IFELSE([AC_LANG_SOURCE(
 [AC_INCLUDES_DEFAULT
-int
+__attribute__ (noinline,noclone)) int
 find_stack_direction (int *addr, int depth)
 {
   int dir, dummy = 0;
diff -Nrup a/libiberty/aclocal.m4 b/libiberty/aclocal.m4
--- a/libiberty/aclocal.m4	2019-11-18 18:49:21.000000000 -0700
+++ b/libiberty/aclocal.m4	2020-01-11 01:08:23.142342127 -0700
@@ -147,7 +147,7 @@ if test $ac_cv_os_cray = yes; then
 fi
 
 AC_CACHE_CHECK(stack direction for C alloca, ac_cv_c_stack_direction,
-[AC_TRY_RUN([find_stack_direction ()
+[AC_TRY_RUN([__attribute__ ((noclone,noinline)) find_stack_direction ()
 {
   static char *addr = 0;
   auto char dummy;