# OpenCV 3.2.0 CMakeLists.txt question

**URL:** <https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835>\
**Category:** Jetson TX1\
**Tags:** opencv\
**Created:** [May 9, 2017, 8:43pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835 "2017-05-09T20:43:00Z")\
**Posts on this page:** 15\
**Page:** 1

<div class="post-metadata">

**Author:** ![nothingworkswithme](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@nothingworkswithme](https://forums.developer.nvidia.com/u/nothingworkswithme)\
**Post date:** [May 9, 2017, 8:43pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/1 "2017-05-09T20:43:00Z")

</div>

Hi guys,

So I just upgraded OpenCv to 3.2 on my TX1 and I was trying to run a same program I used to run with opencv 2.4.3. But When I tried cmake … the following error pops:

```auto
CMake Error at CMakeLists.txt:7 (find_package):
  By not providing "FindOpenCV.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "OpenCV", but
  CMake did not find one.

  Could not find a package configuration file provided by "OpenCV" with any
  of the following names:

    OpenCVConfig.cmake
    opencv-config.cmake

  Add the installation prefix of "OpenCV" to CMAKE_PREFIX_PATH or set
  "OpenCV_DIR" to a directory containing one of the above files. If "OpenCV"
  provides a separate development package or SDK, be sure it has been
  installed.

-- Configuring incomplete, errors occurred!
See also "/home/ubuntu/works/HOG_SVM/build/CMakeFiles/CMakeOutput.log".

```

and here is my CMakeLists.txt, same as the official OpenCv Guide

```auto
cmake_minimum_required (VERSION 2.8)

set(CUDA_USE_STATIC_CUDA_RUNTIME OFF)

project(HOG_SVM)

find_package(OpenCV REQUIRED)

include_directories(${OpenCV_INCLUDE_DIRS})

add_executable(cv_HOG main.cpp)

target_link_libraries(cv_HOG ${OpenCV_LIBS})

```

Any ideas?

Thanks!

---

<div class="post-metadata">

**Author:** ![ngilbert](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ngilbert](https://forums.developer.nvidia.com/u/ngilbert)\
**Post date:** [May 9, 2017, 9:24pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/2 "2017-05-09T21:24:41Z")

</div>

I had this same issue earlier today. I believe that OpenCV and CUDA failed to install on my device, so I’ve been trying to reflash it. Check in usr/share/ to see if there is and OpenCV/ directory. There should be if OpenCV is on your device.

By no means am I an expert. I’ve been trying to reflash my device for about 6 hours now, so take my advice with a grain of salt. Just hope I can point you in the right direction.

---

<div class="post-metadata">

**Author:** ![AastaLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/aastalll/32/14043_2.png) [@AastaLLL](https://forums.developer.nvidia.com/u/AastaLLL)\
**Post date:** [May 10, 2017, 1:42am UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/3 "2017-05-10T01:42:52Z")

</div>

Hi,

Thanks for your question.  
Please attach “/home/ubuntu/works/HOG\_SVM/build/CMakeFiles/CMakeOutput.log” for us debugging.

For opencv3.2, this page can give you some hint:  
[http://dev.t7.ai/jetson/opencv/](http://dev.t7.ai/jetson/opencv/)

---

<div class="post-metadata">

**Author:** ![nothingworkswithme](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@nothingworkswithme](https://forums.developer.nvidia.com/u/nothingworkswithme)\
**Post date:** [May 10, 2017, 3:27pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/4 "2017-05-10T15:27:40Z")

</div>

> [@](#):
>
> Hi,
> 
> Thanks for your question.  
> Please attach “/home/ubuntu/works/HOG\_SVM/build/CMakeFiles/CMakeOutput.log” for us debugging.
> 
> For opencv3.2, this page can give you some hint:  
> [http://dev.t7.ai/jetson/opencv/](http://dev.t7.ai/jetson/opencv/)

Thanks for help out, here is the log file

```auto
The system is: Linux - 3.10.96-tegra - aarch64
Compiling the C compiler identification source file "CMakeCCompilerId.c" succeeded.
Compiler: /usr/bin/cc 
Build flags: 
Id flags: 

The output was:
0

Compilation of the C compiler identification source "CMakeCCompilerId.c" produced "a.out"

The C compiler identification is GNU, found in "/home/ubuntu/works/HOG_SVM/build/CMakeFiles/3.5.1/CompilerIdC/a.out"

Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" succeeded.
Compiler: /usr/bin/c++ 
Build flags: 
Id flags: 

The output was:
0

Compilation of the CXX compiler identification source "CMakeCXXCompilerId.cpp" produced "a.out"

The CXX compiler identification is GNU, found in "/home/ubuntu/works/HOG_SVM/build/CMakeFiles/3.5.1/CompilerIdCXX/a.out"

Determining if the C compiler works passed with the following output:
Change Dir: /home/ubuntu/works/HOG_SVM/build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_f8819/fast"
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```

---

<div class="post-metadata">

**Author:** ![nothingworkswithme](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@nothingworkswithme](https://forums.developer.nvidia.com/u/nothingworkswithme)\
**Post date:** [May 10, 2017, 6:01pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/5 "2017-05-10T18:01:40Z")

</div>

> [@](#):
>
> I had this same issue earlier today. I believe that OpenCV and CUDA failed to install on my device, so I’ve been trying to reflash it. Check in usr/share/ to see if there is and OpenCV/ directory. There should be if OpenCV is on your device.
> 
> By no means am I an expert. I’ve been trying to reflash my device for about 6 hours now, so take my advice with a grain of salt. Just hope I can point you in the right direction.

Hi thanks for the help,

Any luck with your opencv? Mine’s still not working

---

<div class="post-metadata">

**Author:** ![Honey\_Patouceul](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/honey_patouceul/32/389777_2.png) [@Honey\_Patouceul](https://forums.developer.nvidia.com/u/Honey_Patouceul)\
**Post date:** [May 10, 2017, 6:20pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/6 "2017-05-10T18:20:10Z")

</div>

One possible cause is that your app’s cmake config uses pkg-config to get opencv paths, and if you have removed the 2.4 package these can’t be found.  
Assuming you’ve installed opencv-3.2.0 in /usr/local/opencv-3.2.0, using

```auto
cmake -DOpenCV_DIR=/usr/local/opencv-3.2.0 ...and other cmake options for your app

```

for configuring your app build may help you to get further.

Be aware however that there are a few differences in opencv3 API, include files and libraries, that you may have to adjust as compared to opencv-2.4.

---

<div class="post-metadata">

**Author:** ![nothingworkswithme](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@nothingworkswithme](https://forums.developer.nvidia.com/u/nothingworkswithme)\
**Post date:** [May 10, 2017, 8:27pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/7 "2017-05-10T20:27:15Z")

</div>

> [@](#):
>
> One possible cause is that your app’s cmake config uses pkg-config to get opencv paths, and if you have removed the 2.4 package these can’t be found.  
> Assuming you’ve installed opencv-3.2.0 in /usr/local/opencv-3.2.0, using
> 
> ```auto
> cmake -DOpenCV_DIR /usr/local.opencv-3.2.0 ...and other cmake options for your app
> 
> ```
> 
> for configuring your app build may help you to get further.
> 
> Be aware however that there are a few differences in opencv3 API, include files and libraries, that you may have to adjust as compared to opencv-2.4.

Thanks for the reply,

So I have located the OpenCVConfig.cmake file in

```auto
/home/ubuntu/opencv3.2.0/share/OpenCV

```

And I used this command

```auto
cmake -D CMAKE_PREFIX_PATH=/home/ubuntu/opencv3.2.0/share/OpenCV

```

But I am still not able to run my own code. Do I need to re make -j4 the whole Opencv?

---

<div class="post-metadata">

**Author:** ![Honey\_Patouceul](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/honey_patouceul/32/389777_2.png) [@Honey\_Patouceul](https://forums.developer.nvidia.com/u/Honey_Patouceul)\
**Post date:** [May 10, 2017, 8:41pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/8 "2017-05-10T20:41:34Z")

</div>

The question would be what was your setting to CMAKE\_INSTALL\_PREFIX when configuring your opencv-3.2.0 build, and if after building with

```auto
make

```

if you’ve installed with

```auto
sudo make install

```

Is /home/ubuntu/opencv3.2.0/share/OpenCV the path to your opencv-3.2.0 sources or the install path ?

---

<div class="post-metadata">

**Author:** ![Honey\_Patouceul](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/honey_patouceul/32/389777_2.png) [@Honey\_Patouceul](https://forums.developer.nvidia.com/u/Honey_Patouceul)\
**Post date:** [May 10, 2017, 8:51pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/9 "2017-05-10T20:51:58Z")

</div>

If you’ve set

```auto
cmake -DCMAKE_PREFIX_PATH=/home/ubuntu/opencv3.2.0/share/OpenCV

```

when configuring opencv-3.2.0, then run make successfuly in opencv-3.2.0 build directory and then sudo make install, then

```auto
ls /home/ubuntu/opencv3.2.0/share/OpenCV/lib

```

should show the opencv3 libraries.

Then configuring your app with

```auto
cmake -DOpenCV_DIR<b>=</b>/home/ubuntu/opencv3.2.0/share/OpenCV

```

may help.

---

<div class="post-metadata">

**Author:** ![AastaLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/aastalll/32/14043_2.png) [@AastaLLL](https://forums.developer.nvidia.com/u/AastaLLL)\
**Post date:** [May 11, 2017, 4:57am UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/10 "2017-05-11T04:57:04Z")

</div>

Hi,

Thanks for your feedback.  
I tried your cmake file and can build and run without the error.

Based on CMakeCache, cmake looks for opencv from ‘/usr/local/share/opencv’

> //The directory containing a CMake configuration file for OpenCV.  
> OpenCV\_DIR:PATH=/usr/local/share/OpenCV

Please make sure you have installed opencv to /usr/local/share/opencv.  
This should be done via this command when building opencv3.2.0:

```auto
sudo make install

```

Please let us know the results.  
Thanks.

---

<div class="post-metadata">

**Author:** ![nothingworkswithme](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@nothingworkswithme](https://forums.developer.nvidia.com/u/nothingworkswithme)\
**Post date:** [May 15, 2017, 2:55pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/11 "2017-05-15T14:55:28Z")

</div>

Hi yall,

So finally it worked with

```auto
make -D OpenCV_DIR=/home/ubuntu/opencv-3.2.0/share/OpenCV ..

```

But I have to manually type this every time I use cmake now. Here is what I put in my CMakeLists.txt file, not sure why this won’t work

```auto
cmake_minimum_required (VERSION 2.8)

set(CUDA_USE_STATIC_CUDA_RUNTIME OFF)

set(OpenCV_DIR=/home/opencv-3.2.0/share/OpenCV)

project(PED_STUDY)

find_package(OpenCV REQUIRED)

include_directories(${OpenCV_INCLUDE_DIRS})

add_executable(cv_PED main.cpp)

target_link_libraries(cv_PED ${OpenCV_LIBS})

```

Does anyine know how to modify the CMakeLists.txt so that I don’t need to retype each and every time?

Thanks!

---

<div class="post-metadata">

**Author:** ![nothingworkswithme](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@nothingworkswithme](https://forums.developer.nvidia.com/u/nothingworkswithme)\
**Post date:** [May 15, 2017, 2:55pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/12 "2017-05-15T14:55:53Z")

</div>

Hi yall,

So finally it worked with

```auto
make -D OpenCV_DIR=/home/ubuntu/opencv-3.2.0/share/OpenCV ..

```

But I have to manually type this every time I use cmake now. Here is what I put in my CMakeLists.txt file, not sure why this won’t work

```auto
cmake_minimum_required (VERSION 2.8)

set(CUDA_USE_STATIC_CUDA_RUNTIME OFF)

set(OpenCV_DIR=/home/opencv-3.2.0/share/OpenCV)

project(PED_STUDY)

find_package(OpenCV REQUIRED)

include_directories(${OpenCV_INCLUDE_DIRS})

add_executable(cv_PED main.cpp)

target_link_libraries(cv_PED ${OpenCV_LIBS})

```

Does anyine know how to modify the CMakeLists.txt so that I don’t need to retype each and every time?

Thanks!

---

<div class="post-metadata">

**Author:** ![Honey\_Patouceul](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/honey_patouceul/32/389777_2.png) [@Honey\_Patouceul](https://forums.developer.nvidia.com/u/Honey_Patouceul)\
**Post date:** [May 15, 2017, 3:05pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/13 "2017-05-15T15:05:43Z")

</div>

you may change :

```auto
set(OpenCV_DIR=/home/opencv-3.2.0/share/OpenCV)

```

to

```auto
set(OpenCV_DIR=/home/ubuntu/opencv-3.2.0/share/OpenCV)

```

---

<div class="post-metadata">

**Author:** ![nothingworkswithme](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@nothingworkswithme](https://forums.developer.nvidia.com/u/nothingworkswithme)\
**Post date:** [May 15, 2017, 3:41pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/14 "2017-05-15T15:41:33Z")

</div>

> [@](#):
>
> you may change :
> 
> ```auto
> set(OpenCV_DIR=/home/opencv-3.2.0/share/OpenCV)
> 
> ```
> 
> to
> 
> ```auto
> set(OpenCV_DIR=/home/ubuntu/opencv-3.2.0/share/OpenCV)
> 
> ```

OMG!I’m soooo stupid. Thanks for point out!:)

---

<div class="post-metadata">

**Author:** ![TomNVIDIA](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/tomnvidia/32/14181_2.png) [@TomNVIDIA](https://forums.developer.nvidia.com/u/TomNVIDIA)\
**Post date:** [October 18, 2021, 6:59pm UTC](https://forums.developer.nvidia.com/t/opencv-3-2-0-cmakelists-txt-question/49835/15 "2021-10-18T18:59:33Z")

</div>

Closed on October 18, 2021, 6:59pm UTC