How to build a python3.7-abi wheel for ppc64le?

[mgiessing]

Expected behaviour

I want to build a opencv_python-4.10.0.84-cp37-abi3-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl but the abi3 part is missing (i.e. I need to built it manually for py37,38,39,310,311,312,313)

It works generally fine, but I just get:

opencv_python-4.10.0.84-cp37-cp37m-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl

...

opencv_python-4.10.0.84-cp310-cp310-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl

Actual behaviour

It doesn't build the abi3 part - I guess I'm missing a flag etc.?

Steps to reproduce

Be on a ppc64le system to reproduce:

a) Build the build-image

cd /tmp
wget https://raw.githubusercontent.com/opencv/opencv-python/4.x/docker/manylinux2014/Dockerfile_aarch64 -O Dockerfile.ppc64le

sed -i "s/aarch64/ppc64le/g" Dockerfile.ppc64le

docker build -t quay.io/mgiessing/opencv-build:4x -f Dockerfile.ppc64le .

b) Run the build image and build the ppc64le manylinux2014 wheel

# Build manually using Dockerfile.aarch64 and adopted minimally for ppc64le (based off the official quay.io/pypa/manylinux2014_ppc64le)
docker run -ti --rm quay.io/mgiessing/opencv-build:4x

# Repo that has manylinux2014 numpy ppc64le wheels
mkdir ~/.pip
echo "[global]" > ~/.pip/pip.conf
echo "extra-index-url = https://repo.fury.io/mgiessing" >> ~/.pip/pip.conf

cd $HOME
ver=cp37-cp37m

export CMAKE_ARGS="-G Ninja -DPYTHON3_LIMITED_API=ON"

git clone -b 84 --recursive https://github.com/opencv/opencv-python.git && cd opencv-python

# Needed as ppc64le has numpy 1.19.5 prebuilt wheel
sed -i "s/numpy==1.17.0/numpy==1.19.5/g" pyproject.toml

/opt/python/${ver}/bin/pip3 install ninja
export PATH=$PATH:/home/ci/.local/lib/python3.7/site-packages/ninja/data/bin
/opt/python/${ver}/bin/pip3 wheel . --verbose
auditwheel repair opencv_python*whl

Issue submission checklist

• This is not a generic OpenCV usage question (looking for help for coding, other usage questions, homework etc.)
• I have read the README of this repository and understand that this repository provides only an automated build toolchain for OpenCV Python packages (there is no actual OpenCV code here)
• The issue is related to the build scripts in this repository, to the pre-built binaries or is a feature request (such as "please enable this additional dependency")
• [] I'm using the latest version of opencv-python ==> No, I'm using version 84