It takes ages to get opencv-4 (#663730). Could meanwhile opencv-3.4.x be updated ? We currently have 3.4.1 in tree (released in feb. 2018 ! ref: https://opencv.org/opencv-3-4-1/). The current version as of today is 3.4.8 Reproducible: Always
(In reply to Thomas Capricelli from comment #0) + 1 Masking follow-up as "~" and downgrading as of today: . . . [ebuild UD ] media-libs/opencv-2.4.13-r3 [3.4.1-r5] should not be the preferred solution.
An ebuild was pushed on portage for opencv-4 (~amd64), but it has a lot of problems (doesn't emerge, pkgconfig missing, headers broken). Could you meanwhile bumps opencv 3.4.x ???
*** Bug 717598 has been marked as a duplicate of this bug. ***
This ticket was explicitely about updating the 3.4.x branch !
OpenCV 4.4.0 is out already: https://github.com/opencv/opencv/wiki/ChangeLog#version440
opencv 4.1.2 has been available for a while in the tree, making this request obsolete. Even if someone has renamed it since.