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