ZMQ files not linked with TensorRT sample

[pradan]

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU) NVIDIA Jetson Xavier AGX
• DeepStream Version 5.1
• JetPack Version (valid for Jetson only) 4.5.1
• TensorRT Version 7.1.3
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type( questions, new requirements, bugs) questions

• How to reproduce the issue ? (This is for bugs. Including which sample app is using, the configuration files content, the command line used and other details for reproducing)

I installed zmq on my Xavier as follows:

sudo apt-get install libzmq3-dev

I created a simple ZMQ server that uses PUSH/PULL architecture in a C++ program. I am able to compile it using CLI as follows:

$ gcc -Wall -g server.cpp -lstdc++ -lzmq -o out

Then I integrate this code in my sampleUffMaskRCNN. As this is compiled using the makefile (makefile.config). To compile the updated application, I need to add the -lzmq flag to the original makefile. This is what I do:

-COMMON_FLAGS += -Wall -Wno-deprecated-declarations -std=c++11 $(INCPATHS)
+COMMON_FLAGS += -Wall -g -lstdc++ -lzmq -Wno-deprecated-declarations -std=c++11 $(INCPATHS)

On running sudo make clean && sudo make, I get

Linking: ../../bin/sample_uff_mask_rcnn_debug
../../bin/dchobj/sampleUffMaskRCNN.o: In function `main':
/home/virus/Desktop/optimisation/custom-inference-mrcnn/maskRCNN/sampleUffMaskRCNN.cpp:717: undefined reference to `zmq_ctx_new'
/home/virus/Desktop/optimisation/custom-inference-mrcnn/maskRCNN/sampleUffMaskRCNN.cpp:718: undefined reference to `zmq_socket'
/home/virus/Desktop/optimisation/custom-inference-mrcnn/maskRCNN/sampleUffMaskRCNN.cpp:724: undefined reference to `zmq_ctx_new'
/home/virus/Desktop/optimisation/custom-inference-mrcnn/maskRCNN/sampleUffMaskRCNN.cpp:725: undefined reference to `zmq_socket'
/home/virus/Desktop/optimisation/custom-inference-mrcnn/maskRCNN/sampleUffMaskRCNN.cpp:726: undefined reference to `zmq_connect'
/home/virus/Desktop/optimisation/custom-inference-mrcnn/maskRCNN/sampleUffMaskRCNN.cpp:737: undefined reference to `zmq_recv'
collect2: error: ld returned 1 exit status
../Makefile.config:301: recipe for target '../../bin/sample_uff_mask_rcnn_debug' failed
make: *** [../../bin/sample_uff_mask_rcnn_debug] Error 1

I feel that I am messing up with the makefile because zmq works when compiling using gcc.

• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

I have cloned the sampleUffMaskRCNN sample provided in the pre-installed TensorRT and then added the ZMQ part. On compiling this modified sample using modified makefile.config,

[AastaLLL]

Hi,

Do you want to add the zmq library into sampleUffMaskRCNN but it is not working?
If yes, could you share the error you met with us first?

Thanks.

[pradan]

Sorry for leaving that part. Just added it to the question. Please look

[pradan]

Ok so I was wrongly adding the linker flag -lzmq to the compiler line, which was meant to only contain compilation flags and not linker flags.

This is the change I made:

 COMMON_LIBS += $(CUDART_LIB)
+COMMON_LIBS += -lzmq

and undid the change to

-COMMON_FLAGS += -Wall -Wno-deprecated-declarations -std=c++11 $(INCPATHS)