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Cannot Use OpenCV With -std=c++0x/gnu++0x in Fuerte

asked 2012-10-24 14:34:24 -0500

ekaszubski gravatar image

Compiling against OpenCV/FLANN in Fuerte/Ubuntu 12.04 amd64/gcc4.6 fails when using -std=c++0x due to this issue which has yet to be integrated into ROS; are there plans to pull this fix into ROS any time soon?

For example, the following simple test program:

#include <opencv/cv.h>

int main(){ return 0; }

when compiled with:

g++ opencv_test.cpp `pkg-config --libs --cflags opencv` -std=c++0x

will fail with:

error: ‘use_speed_’ was not declared in this scope

So far, I've been able to fix this issue by grabbing the latest OpenCV source (I'm using 2.4.9; issue was fixed in 2.4.3) and compiling/installing with:



sudo make install

which appears to solve the issue, but is far from ideal. Are there any alternative workarounds for this issue? As far as I can tell, it is currently not possible to compile any code requiring both OpenCV and the c++0x/gnu++0x flag in fuerte out-of-the-box.

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1 Answer

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answered 2012-11-06 13:08:05 -0500

ekaszubski gravatar image

OpenCV 2.4.3 just came out, so I went ahead and just packaged it myself and added provides/conflicts/replaces fields for ros-fuerte-opencv2 and ros-groovy-opencv2 (so no compiling from source, and it automatically uninstalls/replaces the existing ros-<version>-opencv2 package in a clean way).

I tested the packages on my precise+fuerte cleanroom and the basic program above compiles as expected; however, I have yet to test it with rosbuild. Presumably, since the opencv2 ros package (provided by vision-opencv) uses pkg-config to grab the cflags and libs, the flags from 2.4.3 should be pulled in and everything should just work.

So if anyone is interested, the debs (libopencv2.4 and libopencv2.4-dev, both version 2.4.3) for oneiric and precise are here, and setup instructions for the PPA are here.

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Cool! Could you select your answer so it shows up as answered?

jbohren gravatar image jbohren  ( 2012-11-06 13:28:29 -0500 )edit

I marked this as answered since my solution technically works, but the best solution would be to update ros-fuerte/groovy-opencv2 to OpenCV 2.4.3.

ekaszubski gravatar image ekaszubski  ( 2012-11-06 15:36:56 -0500 )edit

Well, as of (now) it looks like ros-groovy-opencv2 is at 2.4.3, and ros-fuerte-opencv2 is at 2.4.2 (:

jbohren gravatar image jbohren  ( 2012-11-06 18:37:26 -0500 )edit

Good to know that groovy is up-to-date; hopefully fuerte will be updated soon as well. Thanks for the info!

ekaszubski gravatar image ekaszubski  ( 2012-11-07 11:16:46 -0500 )edit

2.4.3 for fuerte is not yet available, and I don't have access to :-(

Daniel Pinyol gravatar image Daniel Pinyol  ( 2013-04-03 11:09:54 -0500 )edit

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Asked: 2012-10-24 14:34:24 -0500

Seen: 1,075 times

Last updated: Nov 06 '12