xfeatures2d does not compile without cuda (Bug #3886)

Added by be rak over 10 years ago. Updated almost 10 years ago.

Status:	Done	Start date:	2014-08-28
Priority:	Normal	Due date:
Assignee:	-	% Done:	100%
Category:	features2d
Target version:	3.0
Affected version:	branch 'master' (3.0-dev)	Operating System:	Any
Difficulty:	Easy	HW Platform:	Any
Pull request:	https://github.com/Itseez/opencv_contrib/pull/81

Description

[this commit](https://github.com/ernest-galbrun/opencv_contrib/commit/b757d6cc83e48286f59285f9693e127bdc5d33dc) added a dependancy to opencv_cudaarithm, so xfeatures2d will be unavailable on a machine without cuda support.

making it optional, like:

ocv_define_module(xfeatures2d opencv_core opencv_imgproc opencv_features2d opencv_calib3d opencv_shape opencv_highgui opencv_videoio opencv_ml
OPTIONAL opencv_cudaarithm )

would fix it, but there might be a better idea.