+ifdef ALLOW_LIGHTREC_ON_ARM
+CFLAGS += -DALLOW_LIGHTREC_ON_ARM
+endif
+ifeq ($(BUILTIN_GPU),neon)
+ifneq (,$(findstring $(ARCH),x86 i686))
+ CFLAGS_GPU_NEON ?= -msse2 # required
+endif
+ifeq ($(ARCH),x86_64)
+ CFLAGS_GPU_NEON ?= -mssse3 # optional, for more perf
+endif
+CFLAGS += $(CFLAGS_GPU_NEON)
+endif