On Thu, 6 Feb 2020 at 15:04, Danishka Navin <danishka@gmail.com> 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.