With USE="-contrib cuda -download" the following error occurs: CMake Error at modules/core/CMakeLists.txt:40 (message): CUDA: OpenCV requires enabled 'cudev' module from 'opencv_contrib' repository: https://github.com/opencv/opencv_contrib However, the combination USE="contrib cuda -download", causes the following additional error: /tmp/portage/media-libs/opencv-4.1.2-r2/work/opencv-4.1.2/modules/core/include/opencv2/core/base.hpp:320:40: error: expected constructor, destructor, or type conversion before ‘(’ token #define CV_Error( code, msg ) cv::error( code, msg, CV_Func, __FILE__, __LINE__ ) ^ /tmp/portage/media-libs/opencv-4.1.2-r2/work/opencv_contrib-4.1.2/modules/cudaoptflow/src/nvidiaOpticalFlow.cpp:15:1: note: in expansion of macro ‘CV_Error’ CV_Error(cv::Error::HeaderIsNull, "Nvidia Optical Flow headers not found. Make sure cmake downloads it properly"); ^~~~~~~~ However, USE="contrib cuda download" will also "fail" if FEATURES="network-sandbox": -- ADE: Download: v0.1.1f.zip -- Try 1 failed -- ======================================================================= Couldn't download files from the Internet. Please check the Internet access on this host. ======================================================================= CMake Warning at cmake/OpenCVDownload.cmake:203 (message): ADE: Download failed: 6;"Couldn't resolve host name" For details please refer to the download log file: /tmp/portage/media-libs/opencv-4.1.2-r2/work/opencv-4.1.2-abi_x86_64.amd64/CMakeDownloadLog.txt This will not cause cmake to stop and it will try building as if USE=-download. (This could easily be missed and is inconsistent with the USE flag, leading to the above "Nvidia Optical Flow headers not found" error.) Reproducible: Always
I can confirm this issue. Moreover, even if I installl the =media-libs/opencv-4.1.2-r2 with USE="contrib cuda download" and FEATURES="-network-sandbox", the "pkg-config --cflags opencv4" misses the following include path on my system: -I/opt/cuda/targets/x86_64-linux/include Once this is added to CFLAGS in my Makefile, everything works properly.
Also USE="cuda" does not work with gcc > 8.3
Same issue here. I will test with David Bařina suggestions.
I have tried to run cuda_sanitize (from cuda.eclass) to try to get right gcc version used by it still fails :/ Maybe it is not respecting NVCCFLAGS variable. It seems detection is done using variables like NVCC_FLAGS_EXTRA
Looks like the situation is unchanged with media-libs/opencv-4.1.2-r3 I can't compile it successfully, even using gcc-8.3.0 and USE="contrib cuda download" /var/tmp/portage/media-libs/opencv-4.1.2-r3/work/opencv-4.1.2/modules/core/include/opencv2/core/base.hpp:320:40: error: expected constructor, destructor, or type conversion before ‘(’ token #define CV_Error( code, msg ) cv::error( code, msg, CV_Func, __FILE__, __LINE__ ) ^ /var/tmp/portage/media-libs/opencv-4.1.2-r3/work/opencv_contrib-4.1.2/modules/cudaoptflow/src/nvidiaOpticalFlow.cpp:15:1: note: in expansion of macro ‘CV_Error’ CV_Error(cv::Error::HeaderIsNull, "Nvidia Optical Flow headers not found. Make sure cmake downloads it properly");
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=c92eaa6a7d93400503334e9c65df2b8e400ab90f commit c92eaa6a7d93400503334e9c65df2b8e400ab90f Author: Ross Charles Campbell <rossbridger.cc@gmail.com> AuthorDate: 2020-10-18 14:59:46 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2020-11-03 07:18:26 +0000 media-libs/opencv: various fixes - Explicitly depends on virtual/lapacke to prevent its cmake build scripts from implicitly disabling lapack support when it can't find lapacke.h. - Link with cblas when sci-libs/lapack is supplimented as the default lapack implementation. - examples USE requires contribdnn USE to be enabled to prevent build failure. Closes: https://bugs.gentoo.org/700176 Closes: https://bugs.gentoo.org/749681 Closes: https://bugs.gentoo.org/717812 Closes: https://bugs.gentoo.org/701790 Closes: https://bugs.gentoo.org/704518 Package-Manager: Portage-3.0.8, Repoman-3.0.1 Signed-off-by: Ross Charles Campbell <rossbridger.cc@gmail.com> Closes: https://github.com/gentoo/gentoo/pull/17964 Signed-off-by: Sam James <sam@gentoo.org> .../opencv-4.5.0-link-with-cblas-for-lapack.patch | 18 ++++++++++++++++++ media-libs/opencv/opencv-4.5.0.ebuild | 8 +++++++- 2 files changed, 25 insertions(+), 1 deletion(-)
