diff -ur prboom-plus-2.5.1.4/configure prboom-plus-2.5.1.4-dwf/configure
--- prboom-plus-2.5.1.4/configure	2016-01-10 13:20:42.000000000 -0500
+++ prboom-plus-2.5.1.4-dwf/configure	2016-03-13 13:45:01.958318238 -0400
@@ -4926,85 +4926,9 @@
 
 
 # Check whether --enable-cpu-opt was given.
+# DWF: arch=native code removed
 if test "${enable_cpu_opt+set}" = set; then :
   enableval=$enable_cpu_opt;
-
-else
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether compiler supports -march=native" >&5
-$as_echo_n "checking whether compiler supports -march=native... " >&6; }
-OLD_CFLAGS="$CFLAGS"
-CFLAGS="$OLD_CFLAGS -march=native"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  void f() {};
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-
-else
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-  CFLAGS="$OLD_CFLAGS"
-
-  case "$target" in
-        # marginal gains from aligning code
-  i386-*) ;;
-  i486-*) CPU_CFLAGS="-mtune=i486" ;;
-        # nothing special for pentium
-        # CMOV op on ppro/II/686 can help us
-  i686-*) CPU_CFLAGS="-march=i686" ;;
-  esac
-
-NEW_CFLAGS="$CFLAGS"
-for ac_flag in $CPU_CFLAGS
-do
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether compiler supports $ac_flag" >&5
-$as_echo_n "checking whether compiler supports $ac_flag... " >&6; }
- CFLAGS="$NEW_CFLAGS $ac_flag"
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  void f() {};
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-
-  NEW_CFLAGS="$CFLAGS"
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-done
-CFLAGS="$NEW_CFLAGS"
-
-
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
 fi