libraries/opencv: Updated for version 3.4.0

Signed-off-by: Christoph Willing <chris.willing@linux.com>

1 files changed, 19 insertions, 3 deletions

diff --git a/libraries/opencv/README b/libraries/opencv/README
index c7db8828bd..71168738ff 100644
--- a/libraries/opencv/README
+++ b/libraries/opencv/README
@@ -4,6 +4,9 @@ OpenCV was built to provide a common infrastructure for
 computer vision applications and to accelerate the use of
 machine perception in commercial products.
 
+This SlackBuild is incompatible with the opencv-legacy SlackBuild
+so they should not be installed simultaneously.
+
 OpenCV will incorporate features from a wide range of additional
 software that may exist on the host system at build time. The more
 of the relevant software packages that are available, the greater
@@ -11,13 +14,15 @@ the feature set available in the resulting OpenCV package. The
 additional optional packages will mostly be autodetected and used
 at build time without any user intervention. Packages that are
 processed in this way include (by SBo package name):
-    qt5 libdc1394 ffmpeg hdf5 VTK jdk apache-ant numpy python3 numpy3
+    qt5 libdc1394 ffmpeg hdf5 VTK libwebp tesseract
+    glog apache-ant numpy python3 numpy3 OpenBLAS
+    openjdk8 (or openjdk or jdk)
 
 In the unlikely situation that features from these packages are not
 wanted despite already being installed on the host system,
 incorporation of some of them into OpenCV may be suppressed by setting
 the appropriate environment variable to "no" e.g.
-    CVFFMPEG=no ./opencv.SlackBuild
+    CVFFMPEG=no sh ./opencv.SlackBuild
 Features that may be excluded in this manner are controlled by the
 following environment variables:
     CV1394 CVFFMPEG CVVTK
@@ -35,8 +40,19 @@ VTK support will be disabled unless it was built with qt5 support (which
 is possible but not its default). Conversely, if VTK has been built with
 qt5, it will be disabled in OpenCV unless it too is being built with qt5.
 
+The Deep Neural Network module and Extra 2D Features Framework from
+OpenCV's "extra modules" section are disabled by default. They may be
+enabled by setting the DNN and/or XF2D environment variables as required
+e.g.
+    DNN=yes sh ./opencv.SlackBuild
+Enabling either of these modules results in additional downloading during
+the configure stage of building.
+
 Documentation is generated by the SlackBuild unless it is switched off
 by setting the CVDOCS environment variable i.e.
-    CVDOCS=no ./opencv.SlackBuild
+    CVDOCS=no sh ./opencv.SlackBuild
+Enabling the documentation results in additional downloading of example data
+during the configure stage of building.
+
 The graphviz package is an optional dependency for enhanced
 documentation.