opencv_4.4.0.imx: add recipe

Add recipe to support additional machine learning demos and tiny dnn.

Signed-off-by: Chris Dimich <Chris.Dimich@boundarydevices.com>
(cherry picked from commit dc6bebac65d3733548de568f31ca5bfbf9e8a8a5)

1 files changed, 41 insertions, 0 deletions

diff --git a/recipes-support/opencv/opencv/download.patch b/recipes-support/opencv/opencv/download.patch
new file mode 100644
index 00000000..33ac4831
--- /dev/null
+++ b/recipes-support/opencv/opencv/download.patch
@@ -0,0 +1,41 @@
+From b18a280fab06a680d9f831bf8b462647f3cb6214 Mon Sep 17 00:00:00 2001
+From: Ross Burton <ross.burton@intel.com>
+Date: Thu, 9 Jan 2020 16:24:24 +0000
+Subject: [PATCH] opencv: abort configure if we need to download
+
+This CMake module will download files during do_configure.  This is bad as it
+means we can't do offline builds.
+
+Add an option to disallow downloads by emitting a fatal error.
+
+Upstream-Status: Pending
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+---
+ cmake/OpenCVDownload.cmake | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/cmake/OpenCVDownload.cmake b/cmake/OpenCVDownload.cmake
+index 63cf6d3238..4acf477f70 100644
+--- a/cmake/OpenCVDownload.cmake
++++ b/cmake/OpenCVDownload.cmake
+@@ -14,6 +14,7 @@
+ #    RELATIVE_URL - if set, then URL is treated as a base, and FILENAME will be appended to it
+ #  Note: uses OPENCV_DOWNLOAD_PATH folder as cache, default is <opencv>/.cache
+ 
++set(OPENCV_ALLOW_DOWNLOADS ON CACHE BOOL "Allow downloads")
+ set(HELP_OPENCV_DOWNLOAD_PATH "Cache directory for downloaded files")
+ if(DEFINED ENV{OPENCV_DOWNLOAD_PATH})
+   set(OPENCV_DOWNLOAD_PATH "$ENV{OPENCV_DOWNLOAD_PATH}" CACHE PATH "${HELP_OPENCV_DOWNLOAD_PATH}")
+@@ -156,6 +157,11 @@ function(ocv_download)
+ 
+   # Download
+   if(NOT EXISTS "${CACHE_CANDIDATE}")
++    if(NOT OPENCV_ALLOW_DOWNLOADS)
++      message(FATAL_ERROR "Not going to download ${DL_FILENAME}")
++      return()
++    endif()
++
+     ocv_download_log("#cmake_download \"${CACHE_CANDIDATE}\" \"${DL_URL}\"")
+     foreach(try ${OPENCV_DOWNLOAD_TRIES_LIST})
+       ocv_download_log("#try ${try}")