# Why would all these warnings happen? **URL:** \ **Category:** C++\ **Tags:** build, programming\ **Created:** [January 9, 2025, 12:59pm UTC](https://forum.opencv.org/t/why-would-all-these-warnings-happen/19718 "2025-01-09T12:59:07Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![UnlimitedR](https://avatars.discourse-cdn.com/v4/letter/u/e9bcb4/32.png) [@UnlimitedR](https://forum.opencv.org/u/UnlimitedR)\ **Post date:** [January 9, 2025, 12:59pm UTC](https://forum.opencv.org/t/why-would-all-these-warnings-happen/19718/1 "2025-01-09T12:59:07Z")
```bash /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputArray::_InputArray(const cv::Mat&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:103:57: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 103 | inline _InputArray::_InputArray(const Mat& m) { init(MAT+ACCESS_READ, &m); } | ~~~^~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputArray::_InputArray(const std::vector&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:104:83: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 104 | inline _InputArray::_InputArray(const std::vector& vec) { init(STD_VECTOR_MAT+ACCESS_READ, &vec); } | ~~~~~~~~~~~~~~^~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputArray::_InputArray(const cv::UMat&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:105:59: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 105 | inline _InputArray::_InputArray(const UMat& m) { init(UMAT+ACCESS_READ, &m); } | ~~~~^~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputArray::_InputArray(const std::vector&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:106:85: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 106 | inline _InputArray::_InputArray(const std::vector& vec) { init(STD_VECTOR_UMAT+ACCESS_READ, &vec); } | ~~~~~~~~~~~~~~~^~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputArray::_InputArray(const std::array&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:118:22: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 118 | { init(STD_ARRAY_MAT + ACCESS_READ, arr.data(), Size(1, _Nm)); } | ~~~~~~~~~~~~~~^~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputArray::_InputArray(const cv::cuda::GpuMat&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:148:21: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 148 | { init(CUDA_GPU_MAT + ACCESS_READ, &d_mat); } | ~~~~~~~~~~~~~^~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputArray::_InputArray(const std::vector&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:151:38: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 151 | { init(STD_VECTOR_CUDA_GPU_MAT + ACCESS_READ, &d_mat);} | ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputArray::_InputArray(const cv::ogl::Buffer&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:154:22: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 154 | { init(OPENGL_BUFFER + ACCESS_READ, &buf); } | ~~~~~~~~~~~~~~^~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputArray::_InputArray(const cv::cuda::HostMem&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:157:22: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 157 | { init(CUDA_HOST_MEM + ACCESS_READ, &cuda_mem); } | ~~~~~~~~~~~~~~^~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_OutputArray::_OutputArray()’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:200:49: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 200 | inline _OutputArray::_OutputArray() { init(NONE + ACCESS_WRITE, 0); } | ~~~~~^~~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_OutputArray::_OutputArray(cv::Mat&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:202:53: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 202 | inline _OutputArray::_OutputArray(Mat& m) { init(MAT+ACCESS_WRITE, &m); } | ~~~^~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_OutputArray::_OutputArray(std::vector&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:203:80: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 203 | inline _OutputArray::_OutputArray(std::vector& vec) { init(STD_VECTOR_MAT + ACCESS_WRITE, &vec); } | ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_OutputArray::_OutputArray(cv::UMat&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:204:56: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 204 | inline _OutputArray::_OutputArray(UMat& m) { init(UMAT + ACCESS_WRITE, &m); } | ~~~~~^~~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_OutputArray::_OutputArray(std::vector&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:205:82: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 205 | inline _OutputArray::_OutputArray(std::vector& vec) { init(STD_VECTOR_UMAT + ACCESS_WRITE, &vec); } | ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_OutputArray::_OutputArray(std::array&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:217:22: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 217 | { init(STD_ARRAY_MAT + ACCESS_WRITE, arr.data(), Size(1, _Nm)); } | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_OutputArray::_OutputArray(cv::cuda::GpuMat&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:272:21: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 272 | { init(CUDA_GPU_MAT + ACCESS_WRITE, &d_mat); } | ~~~~~~~~~~~~~^~~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_OutputArray::_OutputArray(std::vector&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:275:38: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 275 | { init(STD_VECTOR_CUDA_GPU_MAT + ACCESS_WRITE, &d_mat);} | ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_OutputArray::_OutputArray(cv::ogl::Buffer&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:278:22: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 278 | { init(OPENGL_BUFFER + ACCESS_WRITE, &buf); } | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_OutputArray::_OutputArray(cv::cuda::HostMem&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:281:22: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 281 | { init(CUDA_HOST_MEM + ACCESS_WRITE, &cuda_mem); } | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputOutputArray::_InputOutputArray(cv::Mat&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:328:63: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 328 | inline _InputOutputArray::_InputOutputArray(Mat& m) { init(MAT+ACCESS_RW, &m); } | ~~~^~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputOutputArray::_InputOutputArray(std::vector&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:329:89: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 329 | inline _InputOutputArray::_InputOutputArray(std::vector& vec) { init(STD_VECTOR_MAT+ACCESS_RW, &vec); } | ~~~~~~~~~~~~~~^~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputOutputArray::_InputOutputArray(cv::UMat&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:330:65: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 330 | inline _InputOutputArray::_InputOutputArray(UMat& m) { init(UMAT+ACCESS_RW, &m); } | ~~~~^~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputOutputArray::_InputOutputArray(std::vector&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:331:91: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 331 | inline _InputOutputArray::_InputOutputArray(std::vector& vec) { init(STD_VECTOR_UMAT+ACCESS_RW, &vec); } | ~~~~~~~~~~~~~~~^~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputOutputArray::_InputOutputArray(std::array&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:343:22: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 343 | { init(STD_ARRAY_MAT + ACCESS_RW, arr.data(), Size(1, _Nm)); } | ~~~~~~~~~~~~~~^~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputOutputArray::_InputOutputArray(cv::cuda::GpuMat&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:398:21: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 398 | { init(CUDA_GPU_MAT + ACCESS_RW, &d_mat); } | ~~~~~~~~~~~~~^~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputOutputArray::_InputOutputArray(cv::ogl::Buffer&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:401:22: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 401 | { init(OPENGL_BUFFER + ACCESS_RW, &buf); } | ~~~~~~~~~~~~~~^~~~~~~~~~~ /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::_InputOutputArray::_InputOutputArray(cv::cuda::HostMem&)’: /usr/include/opencv4/opencv2/core/mat.inl.hpp:404:22: warning: arithmetic between different enumeration types ‘cv::_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated [-Wdeprecated-enum-enum-conversion] 404 | { init(CUDA_HOST_MEM + ACCESS_RW, &cuda_mem); } | ~~~~~~~~~~~~~~^~~~~~~~~~~ ``` I was just trying to use the official package (libopencv-dev) ---
**Author:** ![crackwitz](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/crackwitz/32/14_2.png) [@crackwitz](https://forum.opencv.org/u/crackwitz)\ **Post date:** [January 9, 2025, 2:17pm UTC](https://forum.opencv.org/t/why-would-all-these-warnings-happen/19718/2 "2025-01-09T14:17:08Z")
> [@UnlimitedR](#): > > libopencv-dev that doesn’t sound official. that is some linux distribution’s package, that someone maintains who’s (likely) more affiliated with the linux distribution than with opencv. the issue: > > > \##### System information (version) > \- OpenCV =\> 4.5.1+dfsg-4 > \- OS =\> Debian S…id/Experimental > \- Compiler =\> g++-11 (Debian 11.1.0-3) 11.1.0 > > \##### Detailed description > > When I upgraded my compiler to g++-11, just to see if some bug in gcc was already fixed, I found out a new one. It started reporting an error from a system header, which may be even another bug in g++-11, but still, you might want to fix it in OpenCV anyway, so I'll report it here. > > \`\`\` > \- CXX $builddir/cv/alx/compare.cxx.s > In file included from /usr/include/opencv4/opencv2/core/mat.hpp:3723, > from /usr/include/opencv4/opencv2/core.hpp:59, > from /home/user/src/alx/libalx/src/cv/alx/compare.cxx:16: > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputArray::\_InputArray(const cv::Mat&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:103:57: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 103 | inline \_InputArray::\_InputArray(const Mat& m) { init(MAT+ACCESS\_READ, &m); } > | ~~~^~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputArray::\_InputArray(const std::vector\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:104:83: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 104 | nputArray::\_InputArray(const std::vector\& vec) { init(STD\_VECTOR\_MAT+ACCESS\_READ, &vec); } > | ~~~~~~~~~~~~~~^~~~~~~~~~~~ > > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputArray::\_InputArray(const cv::UMat&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:105:59: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 105 | inline \_InputArray::\_InputArray(const UMat& m) { init(UMAT+ACCESS\_READ, &m); } > | ~~~~^~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputArray::\_InputArray(const std::vector\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:106:85: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 106 | utArray::\_InputArray(const std::vector\& vec) { init(STD\_VECTOR\_UMAT+ACCESS\_READ, &vec); } > | ~~~~~~~~~~~~~~~^~~~~~~~~~~~ > > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputArray::\_InputArray(const std::array\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:118:22: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 118 | { init(STD\_ARRAY\_MAT + ACCESS\_READ, arr.data(), Size(1, \_Nm)); } > | ~~~~~~~~~~~~~~^~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputArray::\_InputArray(const cv::cuda::GpuMat&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:148:21: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 148 | { init(CUDA\_GPU\_MAT + ACCESS\_READ, &d\_mat); } > | ~~~~~~~~~~~~~^~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputArray::\_InputArray(const std::vector\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:151:38: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 151 | { init(STD\_VECTOR\_CUDA\_GPU\_MAT + ACCESS\_READ, &d\_mat);} > | ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputArray::\_InputArray(const cv::ogl::Buffer&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:154:22: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 154 | { init(OPENGL\_BUFFER + ACCESS\_READ, &buf); } > | ~~~~~~~~~~~~~~^~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputArray::\_InputArray(const cv::cuda::HostMem&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:157:22: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 157 | { init(CUDA\_HOST\_MEM + ACCESS\_READ, &cuda\_mem); } > | ~~~~~~~~~~~~~~^~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_OutputArray::\_OutputArray()’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:200:49: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 200 | inline \_OutputArray::\_OutputArray() { init(NONE + ACCESS\_WRITE, 0); } > | ~~~~~^~~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_OutputArray::\_OutputArray(cv::Mat&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:202:53: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 202 | inline \_OutputArray::\_OutputArray(Mat& m) { init(MAT+ACCESS\_WRITE, &m); } > | ~~~^~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_OutputArray::\_OutputArray(std::vector\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:203:80: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 203 | \_OutputArray::\_OutputArray(std::vector\& vec) { init(STD\_VECTOR\_MAT + ACCESS\_WRITE, &vec); } > | ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ > > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_OutputArray::\_OutputArray(cv::UMat&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:204:56: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 204 | inline \_OutputArray::\_OutputArray(UMat& m) { init(UMAT + ACCESS\_WRITE, &m); } > | ~~~~~^~~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_OutputArray::\_OutputArray(std::vector\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:205:82: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 205 | OutputArray::\_OutputArray(std::vector\& vec) { init(STD\_VECTOR\_UMAT + ACCESS\_WRITE, &vec); } > | ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ > > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_OutputArray::\_OutputArray(std::array\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:217:22: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 217 | { init(STD\_ARRAY\_MAT + ACCESS\_WRITE, arr.data(), Size(1, \_Nm)); } > | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_OutputArray::\_OutputArray(cv::cuda::GpuMat&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:272:21: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 272 | { init(CUDA\_GPU\_MAT + ACCESS\_WRITE, &d\_mat); } > | ~~~~~~~~~~~~~^~~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_OutputArray::\_OutputArray(std::vector\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:275:38: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 275 | { init(STD\_VECTOR\_CUDA\_GPU\_MAT + ACCESS\_WRITE, &d\_mat);} > | ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_OutputArray::\_OutputArray(cv::ogl::Buffer&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:278:22: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 278 | { init(OPENGL\_BUFFER + ACCESS\_WRITE, &buf); } > | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_OutputArray::\_OutputArray(cv::cuda::HostMem&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:281:22: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 281 | { init(CUDA\_HOST\_MEM + ACCESS\_WRITE, &cuda\_mem); } > | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputOutputArray::\_InputOutputArray(cv::Mat&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:328:63: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 328 | inline \_InputOutputArray::\_InputOutputArray(Mat& m) { init(MAT+ACCESS\_RW, &m); } > | ~~~^~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputOutputArray::\_InputOutputArray(std::vector\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:329:89: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 329 | tputArray::\_InputOutputArray(std::vector\& vec) { init(STD\_VECTOR\_MAT+ACCESS\_RW, &vec); } > | ~~~~~~~~~~~~~~^~~~~~~~~~ > > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputOutputArray::\_InputOutputArray(cv::UMat&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:330:65: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 330 | inline \_InputOutputArray::\_InputOutputArray(UMat& m) { init(UMAT+ACCESS\_RW, &m); } > | ~~~~^~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputOutputArray::\_InputOutputArray(std::vector\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:331:91: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 331 | utArray::\_InputOutputArray(std::vector\& vec) { init(STD\_VECTOR\_UMAT+ACCESS\_RW, &vec); } > | ~~~~~~~~~~~~~~~^~~~~~~~~~ > > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputOutputArray::\_InputOutputArray(std::array\&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:343:22: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 343 | { init(STD\_ARRAY\_MAT + ACCESS\_RW, arr.data(), Size(1, \_Nm)); } > | ~~~~~~~~~~~~~~^~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputOutputArray::\_InputOutputArray(cv::cuda::GpuMat&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:398:21: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 398 | { init(CUDA\_GPU\_MAT + ACCESS\_RW, &d\_mat); } > | ~~~~~~~~~~~~~^~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputOutputArray::\_InputOutputArray(cv::ogl::Buffer&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:401:22: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 401 | { init(OPENGL\_BUFFER + ACCESS\_RW, &buf); } > | ~~~~~~~~~~~~~~^~~~~~~~~~~ > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In constructor ‘cv::\_InputOutputArray::\_InputOutputArray(cv::cuda::HostMem&)’: > /usr/include/opencv4/opencv2/core/mat.inl.hpp:404:22: error: arithmetic between different enumeration types ‘cv::\_InputArray::KindFlag’ and ‘cv::AccessFlag’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 404 | { init(CUDA\_HOST\_MEM + ACCESS\_RW, &cuda\_mem); } > | ~~~~~~~~~~~~~~^~~~~~~~~~~ > In file included from /usr/include/opencv4/opencv2/highgui.hpp:51, > from /home/user/src/alx/libalx/src/cv/alx/compare.cxx:27: > /usr/include/opencv4/opencv2/videoio.hpp: At global scope: > /usr/include/opencv4/opencv2/videoio.hpp:254:80: error: arithmetic between different enumeration types ‘cv::\’ and ‘cv::\’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 254 | CAP\_OPENNI\_IMAGE\_GENERATOR\_PRESENT = CAP\_OPENNI\_IMAGE\_GENERATOR + CAP\_PROP\_OPENNI\_GENERATOR\_PRESENT, > | ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > /usr/include/opencv4/opencv2/videoio.hpp:255:80: error: arithmetic between different enumeration types ‘cv::\’ and ‘cv::\’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 255 | CAP\_OPENNI\_IMAGE\_GENERATOR\_OUTPUT\_MODE = CAP\_OPENNI\_IMAGE\_GENERATOR + CAP\_PROP\_OPENNI\_OUTPUT\_MODE, > | ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > /usr/include/opencv4/opencv2/videoio.hpp:256:80: error: arithmetic between different enumeration types ‘cv::\’ and ‘cv::\’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 256 | CAP\_OPENNI\_DEPTH\_GENERATOR\_PRESENT = CAP\_OPENNI\_DEPTH\_GENERATOR + CAP\_PROP\_OPENNI\_GENERATOR\_PRESENT, > | ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > /usr/include/opencv4/opencv2/videoio.hpp:257:80: error: arithmetic between different enumeration types ‘cv::\’ and ‘cv::\’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 257 | CAP\_OPENNI\_DEPTH\_GENERATOR\_BASELINE = CAP\_OPENNI\_DEPTH\_GENERATOR + CAP\_PROP\_OPENNI\_BASELINE, > | ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ > > /usr/include/opencv4/opencv2/videoio.hpp:258:80: error: arithmetic between different enumeration types ‘cv::\’ and ‘cv::\’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 258 | CAP\_OPENNI\_DEPTH\_GENERATOR\_FOCAL\_LENGTH = CAP\_OPENNI\_DEPTH\_GENERATOR + CAP\_PROP\_OPENNI\_FOCAL\_LENGTH, > | ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > /usr/include/opencv4/opencv2/videoio.hpp:259:80: error: arithmetic between different enumeration types ‘cv::\’ and ‘cv::\’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 259 | CAP\_OPENNI\_DEPTH\_GENERATOR\_REGISTRATION = CAP\_OPENNI\_DEPTH\_GENERATOR + CAP\_PROP\_OPENNI\_REGISTRATION, > | ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > /usr/include/opencv4/opencv2/videoio.hpp:261:77: error: arithmetic between different enumeration types ‘cv::\’ and ‘cv::\’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 261 | CAP\_OPENNI\_IR\_GENERATOR\_PRESENT = CAP\_OPENNI\_IR\_GENERATOR + CAP\_PROP\_OPENNI\_GENERATOR\_PRESENT, > | ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > In file included from /usr/include/opencv4/opencv2/core/mat.hpp:3723, > from /usr/include/opencv4/opencv2/core.hpp:59, > from /home/user/src/alx/libalx/src/cv/alx/compare.cxx:16: > /usr/include/opencv4/opencv2/core/mat.inl.hpp: In instantiation of ‘cv::Mat::Mat(const cv::Matx\<\_Tp, m, n\>&, bool) \[with \_Tp = double; int m = 2; int n = 3\]’: > /usr/include/opencv4/opencv2/imgproc.hpp:2445:64: required from here > /usr/include/opencv4/opencv2/core/mat.inl.hpp:533:23: error: arithmetic between different enumeration types ‘cv::Mat::\’ and ‘cv::traits::Type\::\’ is deprecated \[-Werror=deprecated-enum-enum-conversion\] > 533 | : flags(MAGIC\_VAL + traits::Type\<\_Tp\>::value + CV\_MAT\_CONT\_FLAG), dims(2), rows(m), cols(n), data(0), > | ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ > cc1plus: all warnings being treated as errors > make\[1\]: \*\*\* \[/home/user/src/alx/libalx/lib/recipes.inc.mk:53: /home/user/src/alx/libalx/tmp/cv/alx/compare.cxx.s\] Error 1 > make: \*\*\* \[Makefile:72: cv\] Error 2 > \`\`\` > > \##### Steps to reproduce > > I compile with \`-Wall -Wextra -Werror\`. Including that header, using those warnings/errors, and the latest g++ should be enough to trigger the error. > > \##### Issue submission checklist > > - \[x\] I report the issue, it's not a question > - \[x\] I checked the problem with documentation, FAQ, open issues, > forum.opencv.org, Stack Overflow, etc and have not found solution > BTW, I found this similar report: https://stackoverflow.com/questions/63601869/error-in-compiling-opencv-program-with-g-and-clang > - \[\] I updated to latest OpenCV version and the issue is still there > - \[\] There is reproducer code and related data files: videos, images, onnx, etc > --\> ---
**Author:** ![UnlimitedR](https://avatars.discourse-cdn.com/v4/letter/u/e9bcb4/32.png) [@UnlimitedR](https://forum.opencv.org/u/UnlimitedR)\ **Post date:** [January 10, 2025, 4:02am UTC](https://forum.opencv.org/t/why-would-all-these-warnings-happen/19718/4 "2025-01-10T04:02:49Z")
Do you mean I’d better build from source myself? I think that might be too much work ---
**Author:** ![crackwitz](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/crackwitz/32/14_2.png) [@crackwitz](https://forum.opencv.org/u/crackwitz)\ **Post date:** [January 10, 2025, 9:58am UTC](https://forum.opencv.org/t/why-would-all-these-warnings-happen/19718/5 "2025-01-10T09:58:02Z")
what exactly did you do to get these warnings?