Errors about opencv when compiling in the terminal

Accelerated Computing Intelligent Video Analytics DeepStream SDK
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1

Dear all,I am trying to use opencv C API in a C file,I don’t know if it’s practical.The folder is ：

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As you can see ,I am using deepstream-app sample,and I am trying to add opencv codes in deepstream_app.c.
Besides,the makefile:

CUDA_VER?=11.4
ifeq ($(CUDA_VER),)
  $(error "CUDA_VER is not set")
endif

APP:= deepstream-app

TARGET_DEVICE = $(shell gcc -dumpmachine | cut -f1 -d -)

NVDS_VERSION:=6.1

LIB_INSTALL_DIR?=/opt/nvidia/deepstream/deepstream-$(NVDS_VERSION)/lib/
APP_INSTALL_DIR?=/opt/nvidia/deepstream/deepstream-$(NVDS_VERSION)/bin/

ifeq ($(TARGET_DEVICE),aarch64)
  CFLAGS:= -DPLATFORM_TEGRA
endif

SRCS:= $(wildcard *.c) $(wildcard *.cpp)
SRCS+= $(wildcard ../../apps-common/src/*.c)
SRCS+= $(wildcard ../../apps-common/src/deepstream-yaml/*.cpp)

INCS:= $(wildcard *.h)

PKGS:= gstreamer-1.0 gstreamer-video-1.0 x11 json-glib-1.0

OBJS:= $(SRCS:.c=.o)
OBJS:= $(OBJS:.cpp=.o)

CFLAGS+= -I./ -I../../apps-common/includes \
		 -I../../../includes -DDS_VERSION_MINOR=1 -DDS_VERSION_MAJOR=5 \
		 -I /usr/local/cuda-$(CUDA_VER)/include\
		 -I /usr/include/opencv4
PKGS+=opencv4

LIBS:= -L/usr/local/cuda-$(CUDA_VER)/lib64/ -lcudart

LIBS+= -L$(LIB_INSTALL_DIR) -lnvdsgst_meta -lnvds_meta -lnvdsgst_helper \
	  -lnvdsgst_smartrecord -lnvds_utils -lnvds_msgbroker -lm -lyaml-cpp \
    -lcuda -lgstrtspserver-1.0 -ldl -Wl,-rpath,$(LIB_INSTALL_DIR)

CFLAGS+= $(shell pkg-config --cflags $(PKGS))

LIBS+= $(shell pkg-config --libs $(PKGS))

all: $(APP)

%.o: %.c $(INCS) Makefile
	$(CC) -c -o $@ $(CFLAGS) $<

%.o: %.cpp $(INCS) Makefile
	$(CXX) -c -o $@ $(CFLAGS) $<

$(APP): $(OBJS) Makefile
	$(CXX) -o $(APP) $(OBJS) $(LIBS)

install: $(APP)
	cp -rv $(APP) $(APP_INSTALL_DIR)

clean:
	rm -rf $(OBJS) $(APP)

And I meet the errors below when I sudo make in the terminal:

/usr/include/opencv4/opencv2/core/cvdef.h:773:4: error: #error "OpenCV 4.x+ requires enabled C++11 support"
  773 | #  error "OpenCV 4.x+ requires enabled C++11 support"
      |    ^~~~~
/usr/include/opencv4/opencv2/core/cvdef.h:779:10: fatal error: array: No such file or directory
  779 | #include <array>
      |          ^~~~~~~
compilation terminated.
make: *** [Makefile:71：deepstream_app.o] error 1
3

The version of OpenCV you are using only supports C++. Please select a version that supports C. If you have any questions about the OpenCV, please file a topic directly to the OpenCV forum.

4

There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks

5

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