-PLATFORM_CPPFLAGS += $(call cc-option, -ffreestanding)
-PLATFORM_CPPFLAGS += $(call cc-option, -fno-toplevel-reorder, $(call cc-option, -fno-unit-at-a-time))
-PLATFORM_CPPFLAGS += $(call cc-option, -fno-stack-protector)
-PLATFORM_CPPFLAGS += $(call cc-option, -mpreferred-stack-boundary=2)
+PF_CPPFLAGS_X86 := $(call cc-option, -ffreestanding) \
+ $(call cc-option, -fno-toplevel-reorder, \
+ $(call cc-option, -fno-unit-at-a-time)) \
+ $(call cc-option, -fno-stack-protector) \
+ $(call cc-option, -mpreferred-stack-boundary=2)
+PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_X86)