LIBSO=1 compile darknet.so library on Linux

Makefile

@@ -3,12 +3,14 @@ CUDNN=0
 OPENCV=0
 DEBUG=0
 OPENMP=0
+LIBSO=0
 
 ARCH= -gencode arch=compute_20,code=[sm_20,sm_21] \
       -gencode arch=compute_30,code=sm_30 \
       -gencode arch=compute_35,code=sm_35 \
       -gencode arch=compute_50,code=[sm_50,compute_50] \
-      -gencode arch=compute_52,code=[sm_52,compute_52]
+      -gencode arch=compute_52,code=[sm_52,compute_52] \
+      -gencode arch=compute_61,code=[sm_61,compute_61]
 
 # This is what I use, uncomment if you know your arch and want to specify
 # ARCH=  -gencode arch=compute_52,code=compute_52
@@ -17,7 +19,13 @@ VPATH=./src/
 EXEC=darknet
 OBJDIR=./obj/
 
+ifeq ($(LIBSO), 1)
+LIBNAMESO=darknet.so
+APPNAMESO=uselib
+endif
+
 CC=gcc
+CPP=g++
 NVCC=nvcc 
 OPTS=-Ofast
 LDFLAGS= -lm -pthread 
@@ -63,7 +71,17 @@ endif
 OBJS = $(addprefix $(OBJDIR), $(OBJ))
 DEPS = $(wildcard src/*.h) Makefile
 
-all: obj backup results $(EXEC)
+all: obj backup results $(EXEC) $(LIBNAMESO) $(APPNAMESO)
+
+ifeq ($(LIBSO), 1) 
+CFLAGS+= -fPIC
+
+$(LIBNAMESO): $(OBJS)
+	$(CPP) -shared -std=c++11 -fvisibility=hidden -DYOLODLL_EXPORTS $(COMMON) $(CFLAGS) $^ -o $@ src/yolo_v2_class.cpp $(LDFLAGS)
+	
+$(APPNAMESO): $(OBJS)
+	$(CPP) -std=c++11 $(COMMON) $(CFLAGS) -o $@ src/yolo_console_dll.cpp $(LDFLAGS) -L ./ -l:$(LIBNAMESO)
+endif
 
 $(EXEC): $(OBJS)
 	$(CC) $(COMMON) $(CFLAGS) $^ -o $@ $(LDFLAGS)
@@ -84,5 +102,5 @@ results:
 .PHONY: clean
 
 clean:
-	rm -rf $(OBJS) $(EXEC)
+	rm -rf $(OBJS) $(EXEC) $(LIBNAMESO) $(APPNAMESO)
 

src/yolo_v2_class.hpp

@@ -11,9 +11,17 @@
 #endif	// OPENCV
 
 #ifdef YOLODLL_EXPORTS
+#if defined(_MSC_VER)
 #define YOLODLL_API __declspec(dllexport) 
 #else
+#define YOLODLL_API __attribute__((visibility("default")))
+#endif
+#else
+#if defined(_MSC_VER)
 #define YOLODLL_API __declspec(dllimport) 
+#else
+#define YOLODLL_API
+#endif
 #endif
 
 struct bbox_t {