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opencv / opencv

Open Source Computer Vision Library
https://opencv.org
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Is it possible to raise cmake_minimum_version in opencv 5.0? #25572

Open FantasqueX opened 1 month ago

FantasqueX commented 1 month ago

Describe the feature and motivation

  1. Currently, opencv's cmake_minimum_version is 3.5, and uses some deprecated CMake features such as CMP0148 and CMP0146. If we raise the minimum version, opencv's CMake can be simplified.
  2. https://github.com/opencv/opencv/discussions/25039 More than 90% people think opencv 5.0 should use C++17. https://gcc.gnu.org/projects/cxx-status.html#cxx17 Some C++17 features are available since GCC 5, but support was experimental and the ABI of C++17 features was not stable until GCC 9. GCC 9 was released in May 2019, while CMake 3.14 was released in March 2019. If we follow Ubuntu's life cycle, the earliest LTS release in standard support is 20.04 which ships CMake 3.16.

Additional context

No response

FantasqueX commented 1 month ago

Related work: https://github.com/opencv/opencv/pull/25005

bebuch commented 3 weeks ago

Just a note: For the EOL of Ubuntu LTS (and other distros), the version at the planned release date of OpenCV 5 should be considered. Depending on the release plan, it may be Ubuntu 22.04 LTS.