[Buildroot] [Bug 12171] New: Python-opencv needs config.py and config-3.7.py to run. Only the *.pyc is not enough.

[Buildroot] [Bug 12171] New: Python-opencv needs config.py and config-3.7.py to run. Only the *.pyc is not enough.

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=12171

            Bug ID: 12171
           Summary: Python-opencv needs config.py and config-3.7.py to
                    run. Only the *.pyc is not enough.
           Product: buildroot
           Version: 2019.08
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: trivial
          Priority: P5
         Component: Other
          Assignee: unassigned at buildroot.uclibc.org
          Reporter: ivan.nazarenko at gmail.com
                CC: buildroot at uclibc.org
  Target Milestone: ---

When importing cv2 in python 3.7, the program stops with:

  File "usr/lib/python3.7/site-packages/cv2/__init__.py", line 89, in <module>
  File "usr/lib/python3.7/site-packages/cv2/__init__.py", line 58, in bootstrap
  File "usr/lib/python3.7/site-packages/cv2/__init__.py", line 56, in
load_first_config
ImportError: OpenCV loader: missing configuration file: ['config.py']. Check
OpenCV installation.

Since buildroot removed all *.py, leaving the corresponding *.pyc, the above
config.py file is not in target. But these two files are currently needed
uncompiled for "import cv2".

We can of course specify BR2_PACKAGE_PYTHON3_PY_PYC=y, but this would make all
*.py in target, which is sort of a waste.

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[Buildroot] [Bug 12171] Python-opencv needs config.py and config-3.7.py to run. Only the *.pyc is not enough.

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=12171

--- Comment #1 from Fabrice Fontaine <fontaine.fabrice@gmail.com> ---
I sent a patch to "fix" this issue: https://patchwork.ozlabs.org/patch/1158640.

This patch adds a !BR2_PACKAGE_PYTHON_PYC_ONLY dependency on opencv3's python
option.

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[Buildroot] [Bug 12171] Python-opencv needs config.py and config-3.7.py to run. Only the *.pyc is not enough.

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=12171

--- Comment #2 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com> ---
I have submitted a series to address this:
https://patchwork.ozlabs.org/project/buildroot/list/?series=145444

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[Buildroot] [Bug 12171] Python-opencv needs config.py and config-3.7.py to run. Only the *.pyc is not enough.

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=12171

Peter Korsgaard <jacmet@uclibc.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from Peter Korsgaard <jacmet@uclibc.org> ---
Merged for 2019.11, thanks

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