--- configure.ac.orig  2004-01-23 04:41:32.000000000 -0500
+++ configure.ac       2020-12-06 10:22:19.000000000 -0500
@@ -139,18 +139,13 @@
     case "$optimize" in
 	-O|"-O "*)
 	    optimize="-O"
-	    optimize="$optimize -fforce-mem"
 	    optimize="$optimize -fforce-addr"
 	    : #x optimize="$optimize -finline-functions"
 	    : #- optimize="$optimize -fstrength-reduce"
-	    optimize="$optimize -fthread-jumps"
-	    optimize="$optimize -fcse-follow-jumps"
-	    optimize="$optimize -fcse-skip-blocks"
 	    : #x optimize="$optimize -frerun-cse-after-loop"
 	    : #x optimize="$optimize -frerun-loop-opt"
 	    : #x optimize="$optimize -fgcse"
 	    optimize="$optimize -fexpensive-optimizations"
-	    optimize="$optimize -fregmove"
 	    : #* optimize="$optimize -fdelayed-branch"
 	    : #x optimize="$optimize -fschedule-insns"
 	    optimize="$optimize -fschedule-insns2"