[SOLVED] Using OpenCV with C++ on Slackware

rdx · 03-12-2019, 12:21 PM

I want to use OpenCv with C++ but I am having troubles.
On my desktop, running Slackware64 14.1, the SlackBuilds process craps out with a series of errors related to "'GstMiniObjectClass' does not name a type" This is trying to install opencv-3.0.0

On my laptop, running Slackware64 14.2 I have been rather more successful but not quite enough. After installing opencv-4.0.1 I was able to use the library through python (both 2.7 and 3.6) and I can compile a simple C++ program but when I try to run it, the dynamic library isn't found. I'm not sure where these dynamic libraries are so I can't tell the system where to look. Maybe this should be part of the SlackBuilds install process?

Any advice or suggestions are welcome. Thanks.

rdx · 03-13-2019, 12:06 AM

I've made some progress on the Laptop problem. Simple programs are compiling and running. The difference was the syntax of the Makefile

%:: %.cpp
g++ $< -o $@ `pkg-config --cflags --libs opencv`

Although this is working, I'm not sure its completely right, but it is big progress.

rdx · 03-25-2019, 07:36 AM

As I said before, the makefile was close but not completely right. For the 14.2 machine I found the better script to be:

Code:

%::    %.cpp
       g++ $< -o $@ -std=c++11 `pkg-config --cflags --libs opencv4`

Along the way I crashed my 14.1 system so I don't need to try to make OpenCV work there any more.