Re: OpenCV with Eclipse on Fedora 30

[Howard Howell]

On Thu, 2020-02-06 at 18:36 -0400, George N. White III wrote:
>  On Thu, 6 Feb 2020 at 15:04, Danishka Navin
> <danishka(a)gmail.com&gt;
>  wrote:
>  > Hi,
>  > 
>  > I am new to eclipse and opencv and I was trying to build a sample
>  > c++ code using Eclipse.
>  > 
>  > I have installed following packages. 
>  > rpm -qa | grep opencv
>  > opencv-devel-3.4.4-10.fc30.x86_64
>  > opencv-3.4.4-10.fc30.x86_64
>  > opencv-core-3.4.4-10.fc30.x86_64
>  > opencv-contrib-3.4.4-10.fc30.x86_64
>  > 
>  > 
>  > 00:29:09 **** Incremental Build of configuration Debug for project
>  > sample ****
>  > make all 
>  > Building target: sample
>  > Invoking: GCC C++ Linker
>  > g++ -L/usr/lib64/ -L/usr/lib/ -o "sample"  ./main.o  
>  > -llibopencv_core.so.3.4 -llibopencv_core.so.3.4.4
>  > -llibopencv_highgui.so.34 -llibopencv_highgui.so.3.4.4
>  > 
>  
>  libopencv_core.so.3.4 should be a symbolic link to
>  libopencv_core.so.3.4.4, same for libopencv_highgui.so.3.4. Try:
>  g++ -o "sample"  ./main.o -lopencv_core -lopencv_highgui 
>  Stackoverflow has this among other solutions.
>   
>  > /usr/bin/ld: cannot find -llibopencv_core.so.3.4
>  > /usr/bin/ld: cannot find -llibopencv_core.so.3.4.4
>  > /usr/bin/ld: cannot find -llibopencv_highgui.so.3.4
>  > /usr/bin/ld: cannot find -llibopencv_highgui.so.3.4.4
>  > collect2: error: ld returned 1 exit status
>  > make: *** [makefile:46: sample] Error 1
>  > "make all" terminated with exit code 2. Build might be incomplete.
>  > 
>  > 00:29:10 Build Failed. 5 errors, 0 warnings. (took 419ms)
>  > 
>  > 
>  > $ locate opencv_core.so.3.4
>  > /usr/lib64/libopencv_core.so.3.4
>  > /usr/lib64/libopencv_core.so.3.4.4
>  > 
>  > I have already added /usr/lib64/ and /usr/lib/ as library search
>  > paths in eclipse.
>  > 
>  > Is there anything missing in my config?
>  > 
>  > Regards,
>  > -- 
>  > Danishka Navin
>  > 
>  
>  Did you check if the make file supports make config?  If so run that
>  before the make. 
Regards,
Les H