python-opencv on riscv

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Hello all, I am trying to build caffe on freedom-U540 board, installing the opencv-python, with all dependencies, when i am building the opencv-python struck with error log is attached below and find out the link of opencv-python, can anybody help me out from this error please. GitHub

skvark/opencv-python Automated CI toolchain to produce precompiled opencv-python, opencv-python-headless, opencv-contrib-python and opencv-contrib-python-headless packages. - skvark/opencv-python

Steps i followed

pip install numpy
python2.7 setup.py install

File “/usr/lib/python2.7/site-packages/pip/_internal/vcs/versioncontrol.py”, line 632, in run_command
log_failed_cmd=log_failed_cmd)
File “/usr/lib/python2.7/site-packages/pip/_internal/utils/subprocess.py”, line 242, in call_subprocess
raise InstallationError(exc_msg)
pip._internal.exceptions.InstallationError: Command errored out with exit status 1: git submodule sync Check the logs for full command output.