-- and get in the way of -split-objs. Another option
-- would be to throw them away in the mangler, but this
-- is easier.
+#ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
"-fno-unit-at-a-time",
-- unit-at-a-time doesn't do us any good, and screws
-- up -split-objs by moving the split markers around.
-- It's only turned on with -O2, but put it here just
-- in case someone uses -optc-O2.
+#endif
"-fno-builtin"
-- calling builtins like strlen() using the FFI can
-- cause gcc to run out of regs, so use the external