superbigcup325 600bcf4b21 python: avoid empty LD_LIBRARY_PATH/PATH entries on import (4.x backport of #29905) ...

Backport of #29905 to the 4.x branch, applied verbatim: after this change
`modules/python/package/cv2/__init__.py` is byte-identical to the 5.x version
(same blob 99685b3791), since both branches carried the same code here.

`import cv2` unconditionally rewrites the environment; when LD_LIBRARY_PATH
was previously unset this creates a dangling separator, i.e. an empty entry
which, per ld.so(8), resolves to the current working directory of every
subsequently spawned child process. Children may then pick up same-named
shared libraries from the CWD and fail (real-world case reported in
opencv/opencv-python#1268: a Nuitka-standalone app's `xdg-open -> kde-open`
dying with `libssl.so.3: version 'OPENSSL_3.2.0' not found`; reproduced on
4.11.0.86 - 4.14.0.94 manylinux wheels). The Windows PATH line has the same
dangling-separator pattern.

Identical to #29905: factor the prepend into _prepend_env_paths(), filter
empty entries, write the variable only when there is something to add, and
join with the old value without producing an empty entry.

The follow-up question of not mutating the process environment at all
remains tracked in #28994.

2026-09-10 23:52:36 +08:00

..

__init__.py

python: avoid empty LD_LIBRARY_PATH/PATH entries on import (4.x backport of #29905)

2026-09-10 23:52:36 +08:00

load_config_py2.py

python: bindings loader package

2018-11-16 00:51:16 +00:00

load_config_py3.py

python: fix pytest-cov false warnings by using compile() with full file path in exec_file_wrapper

2025-11-27 17:31:05 +00:00