opencv 4.5.1 build fails with numpy 2.3.0 (all from current develop branch)

[sdas92]

P4A opencv build fails from develop branch

Background

• I am creating an android app (apk) with opencv & numpy from the develop branch.
• The current numpy version is v2.3.0 & opencv version is 4.5.1.

Build error

[100%] Building CXX object modules/gapi/CMakeFiles/opencv_gapi.dir/src/backends/common/serialization.cpp.o
[100%] Building CXX object modules/gapi/CMakeFiles/opencv_gapi.dir/src/backends/streaming/gstreamingbackend.cpp.o
[100%] Building CXX object modules/gapi/CMakeFiles/opencv_gapi.dir/src/backends/ie/bindings_ie.cpp.o
[100%] Linking CXX shared library ../../lib/arm64-v8a/libopencv_gapi.so
[100%] Built target opencv_gapi
[100%] Building CXX object modules/python3/CMakeFiles/opencv_python3.dir/__/src2/cv2.cpp.o
/home/somnath/codes/git/my-org/vision-ai/onnxruntime/.buildozer/android/platform/build-arm64-v8a/build/other_builds/opencv/arm64-v8a__ndk_target_28/opencv/modules/python/src2/cv2.cpp:33:10: fatal error: 'numpy/ndarrayobject.h' file not found
#include <numpy/ndarrayobject.h>
         ^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
make[3]: *** [modules/python3/CMakeFiles/opencv_python3.dir/build.make:76: modules/python3/CMakeFiles/opencv_python3.dir/__/src2/cv2.cpp.o] Error 1
make[2]: *** [CMakeFiles/Makefile2:2306: modules/python3/CMakeFiles/opencv_python3.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:2313: modules/python3/CMakeFiles/opencv_python3.dir/rule] Error 2
make: *** [Makefile:680: opencv_python3] Error 2

My observations

• The above error doesn't occur when we use numpy versions 1.26.5 with opencv 4.5.1. Here is an example of my existing app's numpy recipe & opencv recipe.

• OpenCV with NDK >= 26. When we use NDK > 25, we get below error with -version argument, this error is not coming when using NDK 25b

[100%] Linking CXX shared module ../../lib/arm64-v8a/python3/cv2.cpython-311-x86_64-linux-gnu.so
clang++: error: unknown argument '-version'; did you mean '--version'?
make[3]: *** [modules/python3/CMakeFiles/opencv_python3.dir/build.make:112: lib/arm64-v8a/python3/cv2.cpython-311-x86_64-linux-gnu.so] Error 1
make[2]: *** [CMakeFiles/Makefile2:2306: modules/python3/CMakeFiles/opencv_python3.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:2313: modules/python3/CMakeFiles/opencv_python3.dir/rule] Error 2
make: *** [Makefile:680: opencv_python3] Error 2

My environment details

• My development python version 3.11.13
• Buildozer version 1.5.0
• P4A branch develop which uses hostpython3 & python3 at 3.11.5

Please let me know if you require any further details. Thank you

[YellowLight021]

yes ，i have the same problem