--- configure.orig	2020-06-08 12:22:19.878393341 +0200
+++ configure	2020-06-08 12:23:07.784281119 +0200
@@ -19089,6 +19089,8 @@
 # an incorrect answer.
 #--------------------------------------------------------------------
 
+save_CFLAGS="$CFLAGS"
+CFLAGS="-O0"
 SCM_I_GSC_STACK_GROWS_UP=0
 if test "$cross_compiling" = yes; then :
   { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Guessing that stack grows down -- see scmconfig.h" >&5
@@ -19123,6 +19125,7 @@
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
+CFLAGS="$save_CFLAGS"
 
 
 # The cast to long int works around a bug in the HP C Compiler