esp32-opencv
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joachimBurket
esp32-opencv build failed with error: 'recursive_mutex' in namespace 'std' does not name a type
@joachimBurket I have followed everything as stated in this wikipage here. The configuring and the generation part is fine. When I tried compiling, after making the alloc.cpp fix as stated in the documentation when I proceeded with the build I got the following errors regarding the std::mutex and thread related.
Attaching entire build log.
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[ 23%] Linking CXX static library ../lib/libade.a
[ 23%] Built target ade
[ 23%] Built target opencv_videoio_plugins
[ 24%] Processing OpenCL kernels (core)
-- /home/kowshik/Downloads/esp32-opencv-master/build/modules/core/opencl_kernels_core.hpp contains the same content
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In file included from /home/kowshik/Downloads/esp32-opencv-master/modules/core/src/precomp.hpp:49:0,
from /home/kowshik/Downloads/esp32-opencv-master/modules/core/src/algorithm.cpp:43:
/home/kowshik/Downloads/esp32-opencv-master/modules/core/include/opencv2/core/utility.hpp:714:14: error: 'recursive_mutex' in namespace 'std' does not name a type
typedef std::recursive_mutex Mutex;
^
/home/kowshik/Downloads/esp32-opencv-master/modules/core/include/opencv2/core/utility.hpp:715:25: error: 'Mutex' is not a member of 'cv'
typedef std::lock_guard<cv::Mutex> AutoLock;
^
/home/kowshik/Downloads/esp32-opencv-master/modules/core/include/opencv2/core/utility.hpp:715:25: error: 'Mutex' is not a member of 'cv'
/home/kowshik/Downloads/esp32-opencv-master/modules/core/include/opencv2/core/utility.hpp:715:34: error: template argument 1 is invalid
typedef std::lock_guard<cv::Mutex> AutoLock;
^
In file included from /home/kowshik/Downloads/esp32-opencv-master/modules/core/src/algorithm.cpp:43:0:
/home/kowshik/Downloads/esp32-opencv-master/modules/core/src/precomp.hpp:365:5: error: 'Mutex' in namespace 'cv' does not name a type
cv::Mutex& getInitializationMutex();
^
cc1plus: warning: unrecognized command line option '-Wno-unnamed-type-template-args'
cc1plus: warning: unrecognized command line option '-Wno-frame-address'
make[2]: *** [modules/core/CMakeFiles/opencv_core.dir/build.make:103: modules/core/CMakeFiles/opencv_core.dir/src/algorithm.cpp.obj] Error 1
make[1]: *** [CMakeFiles/Makefile2:845: modules/core/CMakeFiles/opencv_core.dir/all] Error 2
make: *** [Makefile:166: all] Error 2
Please let me know how to fix this? What causes this and I have seen similar error when I tried to build opencv standalone with arm-none-eabi-gcc compiler.
Thanks, G Kowshik
Requires ESP32 with PARAM and ESP-IDF V4.4.x. This is a record of when I built a library for ESP32S3.
$ idf.py --version
ESP-IDF v4.4.5-104-g8b94183c9c-dirty
$ cd $HOME
$ find . -name toolchain-esp32s3.cmake -print
./esp-idf/tools/cmake/toolchain-esp32s3.cmake
$ git clone https://github.com/joachimBurket/esp32-opencv
$ cd esp32-opencv/esp32/scripts
$ ./build_opencv_for_esp32.sh $HOME/esp-idf/tools/cmake/toolchain-esp32s3.cmake
$ ls -l ../lib/opencv
合計 17892
drwxr-xr-x 1 nop nop 40 1月 20 12:40 3rdparty
-rw-r--r-- 1 nop nop 859226 1月 20 12:40 libade.a
-rw-r--r-- 1 nop nop 8682766 1月 20 12:40 libopencv_core.a
-rw-r--r-- 1 nop nop 500044 1月 20 12:40 libopencv_imgcodecs.a
-rw-r--r-- 1 nop nop 8270242 1月 20 12:40 libopencv_imgproc.a
drwxr-xr-x 1 nop nop 180 1月 20 12:40 opencv2
$ cd ../lib
$ cp -r opencv ../examples/hello_opencv/main/
$ cd ../examples/hello_opencv
$ idf.py set-target esp32s3
$ idf.py menuconfig
Change Flash size to 4M.
Add Parition Table
$ idf.py flash monitor
I (490) hello_opencv: Starting main
M1 =
[ 0, 0, 255, 0, 0, 255;
0, 0, 255, 0, 0, 255]
M2 =
[ 0, 0, 111, 0, 0, 111;
0, 0, 111, 0, 0, 111]
eye =
[0.1, 0, 0, 0, 0, 0, 0, 0, 0, 0;
0, 0.1, 0, 0, 0, 0, 0, 0, 0, 0;
0, 0, 0.1, 0, 0, 0, 0, 0, 0, 0;
0, 0, 0, 0.1, 0, 0, 0, 0, 0, 0;
0, 0, 0, 0, 0.1, 0, 0, 0, 0, 0;
0, 0, 0, 0, 0, 0.1, 0, 0, 0, 0;
0, 0, 0, 0, 0, 0, 0.1, 0, 0, 0;
0, 0, 0, 0, 0, 0, 0, 0.1, 0, 0;
0, 0, 0, 0, 0, 0, 0, 0, 0.1, 0;
0, 0, 0, 0, 0, 0, 0, 0, 0, 0.1]
ones =
[ 3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3;
3, 3, 3, 3]
floats vector =
[3.1415927;
2;
3.01]
Gray matrix =
[ 1, 2, 3, 4, 5;
6, 7, 8, 9, 10;
11, 12, 13, 14, 15]
Thresholded matrix =
[ 0, 0, 0, 0, 0;
0, 0, 255, 255, 255;
255, 255, 255, 255, 255]
Resized matrix =
[ 2, 3, 4, 6;
9, 10, 11, 13]
Thank you @nopnop2002 your excellent example saved a ton of time for me! There should be "idf.py build" before the last comment to make your guide perfect.
