src?=git
bld?=sys
git_url?=https://github.com/opencv
-tar_url?=https://cinelerra-cv.org/five/src/opencv-20170916.tgz
+tar_url?=https://www.cinelerra-gg.org/download/opencv/opencv-20180401.tgz
opencv_tar:=$(notdir $(tar_url))
cpus:=$(shell grep -c "^proc" /proc/cpuinfo)