;;
*)
# -O2 and below allowed on 32-bit
enable_optimize=$(echo "$CFLAGS" | sed 's/.*\(-O[012]\?\).*/\1/p')
enable_optimize=$(echo "$CFLAGS" | sed 's/.*\(-O[01s2]\?\).*/\1/p')
enable_optimize=${enable_optimize:--O2}
filter-flags -O -O?