Vivado HLS cannot find -lopencv* during C simulation

[afilgueras]

Hi all,

I am trying to run a c simulation but it results in an error (see below).

I'm not using opencv at all.

I'm running Vivado 2014.3 on an ubuntu 14.04 machine.

Do I have to manually install all opencv libraries on the system? Or am I missing something else like setting some library path or similar.

Thank you

   Compiling ../../../../source/mmult_tb.cpp in debug mode
   Compiling ../../../../source/mmult_core.cpp in debug mode
   Generating csim.exe
/usr/bin/ld: cannot find -lopencv_calib3d
/usr/bin/ld: cannot find -lopencv_contrib
/usr/bin/ld: cannot find -lopencv_core
/usr/bin/ld: cannot find -lopencv_features2d
/usr/bin/ld: cannot find -lopencv_flann
/usr/bin/ld: cannot find -lopencv_gpu
/usr/bin/ld: cannot find -lopencv_highgui
/usr/bin/ld: cannot find -lopencv_imgproc
/usr/bin/ld: cannot find -lopencv_legacy
/usr/bin/ld: cannot find -lopencv_ml
/usr/bin/ld: cannot find -lopencv_objdetect
/usr/bin/ld: cannot find -lopencv_photo
/usr/bin/ld: cannot find -lopencv_stitching
/usr/bin/ld: cannot find -lopencv_superres
/usr/bin/ld: cannot find -lopencv_ts
/usr/bin/ld: cannot find -lopencv_video
/usr/bin/ld: cannot find -lopencv_videostab
collect2: ld returned 1 exit status
make: *** [csim.exe] Error 1
@E [SIM-1] 'csim_design' failed: compilation error(s).

[debrajr]

Can you post your testcase here?

[afilgueras]

Hi

Sorry for taking so long to reply.

I've managed to create a simple test case that reproduces the error in my environment.

This can be tested running vivado_hls -f script.tcl which runs C cosimulation and synthesis.

[debrajr]

Are you sure this is the correct testcase? I ran script.tcl in HLS 2014.3 but on Windows 7 environment and it ran without any error. Attached is the vivado_hls.log.

Additonally I didnt find any OpenCV reference in the files.

Could you please recheck?

[afilgueras]

I checked that this small test case causes me these problems. I've attached the log file.

If I go to the csim directory project/solution1/csim/build and run
make -f csim.mk --dry-run
I get:

/Soft/xilinx/Vivado_HLS/2014.3/lnx64/tools/gcc/bin/g++ obj/test_tb.o obj/test.o -D_DEBUG -Wl,--as-needed -L "/Soft/xilinx/Vivado_HLS/2014.3/lnx64/tools/systemc/lib" -lsystemc -lpthread -L "/Soft/xilinx/Vivado_HLS/2014.3/lnx64/tools/fpo_v7_0" -lgmp -lmpfr -lIp_floating_point_v7_0_bitacc_cmodel -L "/Soft/xilinx/Vivado_HLS/2014.3/lnx64/tools/opencv" -lopencv_calib3d -lopencv_contrib -lopencv_core -lopencv_features2d -lopencv_flann -lopencv_gpu -lopencv_highgui -lopencv_imgproc -lopencv_legacy -lopencv_ml -lopencv_objdetect -lopencv_photo -lopencv_stitching -lopencv_superres -lopencv_ts -lopencv_video -lopencv_videostab -L "/Soft/xilinx/Vivado_HLS/2014.3/lnx64/tools/fft_v9_0" -lIp_xfft_v9_0_bitacc_cmodel -L "/Soft/xilinx/Vivado_HLS/2014.3/lnx64/tools/fir_v7_0" -lgmp -lIp_fir_compiler_v7_2_bitacc_cmodel  -o csim.exe

Which tries to link with opencv stuff

I've checked the makefiles and there is a __SIM_OPENCV__ = 1 in csim.mk which causes everything to be compiled with opencv libraries.
I've also attached the makefiles.

(for some reason I had to compress the files in order to attach them :/ )

Regards

Antonio

[debrajr]

Ok..thanks for the clarification. I would try this out and post in this thread.

[afilgueras · Accepted solution]

Hi,

I have been able to work around this problem

It is not very elegant but I got the problem sorted :)

Basically I made the opencv libraries included in vivado hls visible to the compiler.
The needed libraries are in xilinx/Vivado_HLS/2014.3/lnx64/tools/opencv/
so I made a soft link to a directory ~/lib for instance and add that directory to the LIBRARY_PATH environment variable.

I also had to do some renaming so the files have the right name.
For instance libopencv_core.so.2.4.5 -> libopencv_core.so

By the way, I still think that the best solution is that the compiler does not try to link against libraries that are not needed.

[debrajr]

Hi,
Thanks for the update. Please feel free to mark your post as an accepted solution and close this topic. This would be helpful for other visitors on our community.