-ifneq ($(CONFIG_GPROF),y)
-ARCH_CFLAGS += -DUM_FASTCALL
-endif
-
-ELF_ARCH := $(SUBARCH)
-ELF_FORMAT := elf32-$(SUBARCH)
-
-OBJCOPYFLAGS := -O binary -R .note -R .comment -S
-
-SYS_UTIL_DIR := $(ARCH_DIR)/sys-i386/util
+ifeq ("$(origin SUBARCH)", "command line")
+ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)")
+CFLAGS += $(call cc-option,-m32)
+AFLAGS += $(call cc-option,-m32)
+LINK-y += $(call cc-option,-m32)
+UML_OBJCOPYFLAGS += -F $(ELF_FORMAT)