-fdata-sections \
-fstack-protector \
--param=ssp-buffer-size=4])
+AS_CASE([$CFLAGS], [*-O[[12345\ ]]*],
+ [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
+ -flto])],
+ [AC_MSG_RESULT([skipping -flto, optimization not enabled])])
AC_SUBST([OUR_CFLAGS], "$with_cflags $address_sanitizer_cflags")
AS_CASE([$CFLAGS], [*-O[[12345\ ]]*],