cannot find -lnvstereo_inference.

[rahulsharma11]

Hi, While building the inference code, it throws error of "cannot find -lnvstereo_inference". Also not able to see static library "nvstereo_inference" in lib folder. Please suggest. Thanks.

[Alexey-Kamenev]

How did you build the library? We recommend following the instructions. If you build debug version by following the instructions, the static library will be located at ./build/lib/libnvstereo_inference_debug.a. The sample app binary will be located at ./bin/nvstereo_sample_app_debug.

[rahulsharma11]

Ok thanks for clarification. One more thing can you please tell me as i have converted the tenserflow model to tensorRT. Now for "Building Inference code" section, i have to do this on jetson itself or my laptop? As i am not clear from the documents . What is the exat output file to be moved to jetson to run.

[Alexey-Kamenev]

First of all, you don't have to convert TF models - we already did that using our scripts and shared the converted models along with corresponding TF models, for example, here. TensorRT directory contains ready-to-use model so all you need is to build the library and sample app.

Second, you can use the library or run the sample app both on your laptop and Jetson. You will need to make sure that all proper dependencies are installed (like CUDA 9, cuDNN 7 and TensorRT 3 for the library and OpenCV 3.3.1 for the sample app). In case of Jetson, all these dependencies are installed automatically with JetPack. In case of a host, you either need to install the dependencies yourself, or, which is preferred, use Docker image. We already have a Docker image in redtail that can also be used to build Stereo DNN code so you can either use that image or modify it according to your needs. Scripts and wiki.

[rahulsharma11]

Hi, I am building with debug mode directly on jetson tx2 itself. While make, it throws error- /usr/bin/ld: cannot find -lnvstereo_inference How can i correct this?

[Alexey-Kamenev]

1. What version of JetPack are you using on your Jetson? We tested our code only with JetPack 3.2 and have not had a chance yet to test it with recently released JetPack 3.3. If possible, use 3.2.
2. What cmake and make commands did you use to build the code?

[rahulsharma11]

Hi am using jetpack3.2.1. And followed cmake -DCMAKE_BUILD_TYPE=Debug .. what you suggested above. Isuue is while make.

[Alexey-Kamenev]

Unfortunately, this does not repro on my Jetson TX2 with JetPack 3.2 and fresh clone of redtail.

nvidia@tegra-ubuntu:~$ git clone https://github.com/NVIDIA-Jetson/redtail.git redtail_1
Cloning into 'redtail_1'...
remote: Counting objects: 558, done.
remote: Total 558 (delta 0), reused 0 (delta 0), pack-reused 557
Receiving objects: 100% (558/558), 549.61 MiB | 29.81 MiB/s, done.
Resolving deltas: 100% (180/180), done.
Checking connectivity... done.
Checking out files: 100% (213/213), done.
nvidia@tegra-ubuntu:~$ cd redtail_1/stereoDNN/
nvidia@tegra-ubuntu:~/redtail_1/stereoDNN$ mkdir build
nvidia@tegra-ubuntu:~/redtail_1/stereoDNN$ cd ./build/
nvidia@tegra-ubuntu:~/redtail_1/stereoDNN/build$ cmake -DCMAKE_BUILD_TYPE=Debug ..
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
Using _debug suffix.
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Found CUDA: /usr/local/cuda-9.0 (found suitable version "9.0", minimum required is "9.0") 
-- Found OpenCV: /usr (found suitable version "3.3.1", minimum required is "3.3.1") 
-- Found GTest: /usr/src/gtest/libgtest.a  
-- Configuring done
-- Generating done
-- Build files have been written to: /home/nvidia/redtail_1/stereoDNN/build
nvidia@tegra-ubuntu:~/redtail_1/stereoDNN/build$ make
[  5%] Building NVCC (Device) object lib/CMakeFiles/nvstereo_inference_debug.dir/nvstereo_inference_debug_generated_kernels.cu.o
Scanning dependencies of target nvstereo_inference_debug
[ 10%] Building CXX object lib/CMakeFiles/nvstereo_inference_debug.dir/conv3d_transpose_plugin.cpp.o
[ 15%] Building CXX object lib/CMakeFiles/nvstereo_inference_debug.dir/conv_utils.cpp.o
[ 20%] Building CXX object lib/CMakeFiles/nvstereo_inference_debug.dir/slice_plugin.cpp.o
[ 25%] Building CXX object lib/CMakeFiles/nvstereo_inference_debug.dir/elu_plugin.cpp.o
[ 30%] Building CXX object lib/CMakeFiles/nvstereo_inference_debug.dir/padding_plugin.cpp.o
[ 35%] Building CXX object lib/CMakeFiles/nvstereo_inference_debug.dir/internal_utils.cpp.o
[ 40%] Building CXX object lib/CMakeFiles/nvstereo_inference_debug.dir/transform_plugin.cpp.o
[ 45%] Building CXX object lib/CMakeFiles/nvstereo_inference_debug.dir/conv3d_plugin.cpp.o
[ 50%] Building CXX object lib/CMakeFiles/nvstereo_inference_debug.dir/softargmax_plugin.cpp.o
[ 55%] Building CXX object lib/CMakeFiles/nvstereo_inference_debug.dir/cost_volume_plugin.cpp.o
[ 60%] Linking CXX static library libnvstereo_inference_debug.a
[ 60%] Built target nvstereo_inference_debug
Scanning dependencies of target nvstereo_sample_app_debug
[ 65%] Building CXX object sample_app/CMakeFiles/nvstereo_sample_app_debug.dir/resnet18_1025x321_net.cpp.o
[ 70%] Building CXX object sample_app/CMakeFiles/nvstereo_sample_app_debug.dir/resnet18_2D_513x257_net.cpp.o
[ 75%] Building CXX object sample_app/CMakeFiles/nvstereo_sample_app_debug.dir/main.cpp.o
[ 80%] Building CXX object sample_app/CMakeFiles/nvstereo_sample_app_debug.dir/nvsmall_1025x321_net.cpp.o
[ 85%] Building CXX object sample_app/CMakeFiles/nvstereo_sample_app_debug.dir/nvtiny_513x161_net.cpp.o
[ 90%] Linking CXX executable ../../bin/nvstereo_sample_app_debug
[ 90%] Built target nvstereo_sample_app_debug
Scanning dependencies of target nvstereo_tests_debug
[ 95%] Building CXX object tests/CMakeFiles/nvstereo_tests_debug.dir/tests_main.cpp.o
[100%] Linking CXX executable ../../bin/nvstereo_tests_debug
[100%] Built target nvstereo_tests_debug

[rahulsharma11]

Ok. Thanks. Will check that. MAy be i am doing something wrong.