buildroot opencv3 python package builds for the wrong target?
Question:
I am using buildroot tagged 2017.11.2 (building for aarch64). I enable build of python3 library for opencv3 in the buildroot configuration:
BR2_PACKAGE_PYTHON3=y
BR2_PACKAGE_OPENCV3=y
BR2_PACKAGE_OPENCV3_LIB_PYTHON=y
I can see during the build that cmake says:
-- Host: Linux 4.13.0-36-generic x86_64
-- Target: Linux aarch64
-- C++ Compiler: /home/buildroot/output/host/bin/aarch64-linux-gnu-g++ (ver 6.4.1)
But later I see
[100%] Linking CXX shared module ../../lib/python3/cv2.cpython-36m-x86_64-linux-gnu.so
[100%] Built target opencv_python3
I would expect cv2.cpython-36m-x86_64-linux-gnu.so to be named cv2.cpython-36m-aarch64-linux-gnu.so. What can I do to fix this?
Answers:
It looks like the required distutils environment variables are not set. Can you try setting OPENCV3_CONF_ENV to $(PKG_PYTHON_DISTUTILS_ENV)? If that works, please prepare a patch and send it to the Buildroot mailing list.
I am using buildroot tagged 2017.11.2 (building for aarch64). I enable build of python3 library for opencv3 in the buildroot configuration:
BR2_PACKAGE_PYTHON3=y
BR2_PACKAGE_OPENCV3=y
BR2_PACKAGE_OPENCV3_LIB_PYTHON=y
I can see during the build that cmake says:
-- Host: Linux 4.13.0-36-generic x86_64
-- Target: Linux aarch64
-- C++ Compiler: /home/buildroot/output/host/bin/aarch64-linux-gnu-g++ (ver 6.4.1)
But later I see
[100%] Linking CXX shared module ../../lib/python3/cv2.cpython-36m-x86_64-linux-gnu.so
[100%] Built target opencv_python3
I would expect cv2.cpython-36m-x86_64-linux-gnu.so to be named cv2.cpython-36m-aarch64-linux-gnu.so. What can I do to fix this?
It looks like the required distutils environment variables are not set. Can you try setting OPENCV3_CONF_ENV to $(PKG_PYTHON_DISTUTILS_ENV)? If that works, please prepare a patch and send it to the Buildroot mailing list.