Added flag AVX to the Makefile

Makefile

@@ -2,10 +2,16 @@ GPU=0
 CUDNN=0
 CUDNN_HALF=0
 OPENCV=0
-DEBUG=0
+AVX=0
 OPENMP=0
 LIBSO=0
 
+# set GPU=1 and CUDNN=1 to speedup on GPU
+# set CUDNN_HALF=1 to further speedup 3 x times (Mixed-precision using Tensor Cores) on GPU Tesla V100, Titan V, DGX-2
+# set AVX=1 and OPENMP=1 to speedup on CPU (if error occurs then set AVX=0)
+
+DEBUG=0
+
 ARCH= -gencode arch=compute_30,code=sm_30 \
       -gencode arch=compute_35,code=sm_35 \
       -gencode arch=compute_50,code=[sm_50,compute_50] \
@@ -50,8 +56,10 @@ CFLAGS=-Wall -Wfatal-errors -Wno-unused-result -Wno-unknown-pragmas
 ifeq ($(DEBUG), 1) 
 OPTS= -O0 -g
 else
+ifeq ($(AVX), 1) 
 CFLAGS+= -ffp-contract=fast -mavx
 endif
+endif
 
 CFLAGS+=$(OPTS)