Created attachment 889036 [details] build.log of the failed compilation The Git version of Eigen (dev-cpp/eigen-9999) needs a C++14-capable compiler to be usable (as of 2024-03-30). Since media-video/movit-1.6.3-r1 has a `CXXFLAGS="$CXXFLAGS -std=gnu++11"` line in its configure script, it fails to build against a recent Eigen checkout, producing many pages of errors, starting with: ``` In file included from /usr/include/eigen3/Eigen/Core:19, from ycbcr.cpp:4: /usr/include/eigen3/Eigen/src/Core/util/Macros.h:709:2: error: #error Eigen requires at least c++14 support. 709 | #error Eigen requires at least c++14 support. | ^~~~~ ``` Building against the stable Eigen version, dev-cpp/eigen-3.4.0-r1, works fine, and the attached patch fixes the issue with the Git version. The issue is known upstream and fixed in movit-1.7.0, see https://git.sesse.net/?p=movit;a=commit;h=f023440cc34f15c0c3bdb8de62c4e3a661ef068b
Created attachment 889037 [details, diff] Patch fixing movit compilation against eigen-9999
