--- gforth/configure.in	2008/01/07 20:54:15	1.206
+++ gforth/configure.in	2008/01/08 19:55:55	1.207
@@ -32,16 +32,6 @@ AC_CONFIG_HEADERS(engine/config.h)
 #suppress the "-g -O2" default
 test "$CFLAGS" || CFLAGS=-O2
 
-AC_ARG_ENABLE(force-reg,
-	AC_HELP_STRING([--enable-force-reg],
-		        [ Use explicit register declarations if they appear in
-			  the machine.h file. This can cause a good speedup,
-			  but also incorrect code with some gcc versions on
-			  some processors (default disabled).]),
-	,enable_force_reg=no)
-test "$enable_force_reg" = "no"||
-  AC_DEFINE(FORCE_REG,,[Define if you want to use explicit register declarations for better performance or for more convenient CODE words (does not work with all GCC versions on all machines)])
-
 AC_ARG_ENABLE(force-cdiv,
 	AC_HELP_STRING([--enable-force-cdiv],
 		       [  Use the native C division - symmetric - instead of
@@ -518,6 +508,10 @@ else
            OPTS=-noll
         fi
 fi
+
+if grep -q FORCE_REG arch/$machine/machine.h; then
+   OPTS=`for i in $OPTS; do echo -n "$i-reg "; done`$OPTS
+fi
 AC_SUBST(OPTS)
 
 AC_TYPE_OFF_T