-# Don't split object files for libs if we're building DLLs, or booting from
-# .hc files.
-ifeq "$(DLLized)" "YES"
-SplitObjs=NO
-endif
-ifeq "$(BootingFromHc)" "YES"
-SplitObjs=NO
-endif
-ifeq "$(GhcUnregisterised)" "YES"
-SplitObjs=NO
-endif
-ifeq "$(TargetArch_CPP)" "ia64"
-SplitObjs=NO
-endif
+# lazy test, so that $(GhcUnregisterised) can be set in build.mk
+SplitObjs=$(strip $(if $(filter $(TargetArch_CPP),i386 x86_64 powerpc sparc),\
+ $(if $(filter YES,$(BootingFromHC)),\
+ NO,\
+ $(if $(filter NO,$(GhcUnregisterised)),\
+ YES,\
+ NO)),\
+ NO))