rts_CMM_SRCS = $(wildcard rts/*.cmm)
# Don't compile .S files when bootstrapping a new arch
-ifeq "$(TARGETPLATFORM)" "$(HOSTPLATFORM)"
+ifneq "$(PORTING_HOST)" "YES"
ifneq "$(findstring $(TargetArch_CPP), powerpc powerpc64)" ""
rts_S_SRCS += rts/AdjustorAsm.S
else