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I was tried to build .so file. The file contains libraries such as tbb,dlib. When i execute my cpp file, exception raised [Assembler messages: Error: thumb conditional instruction should be in IT block -- `strexeq r1,r2,[r4]'].

vector<tbb::atomic<bool> > face_detections_used(face_detections.size());
    if(face_detections_used[detection_ind].compare_and_swap(true, false) == false)
        {
            // Reinitialise the model
                clm_models[model].Reset();
                clm_models[model].detection_success = false;
          detection_success = CLMTracker::DetectLandmarksInVideo(grayscale_image, depth_image, face_detections[detection_ind], clm_models[model], clm_parameters[model]);

            active_models[model] = true;

            break;
            }

I thing exception from that code. Any specific cpp flags required for tbb. Any idea about this, its helpful for me thank you

Vicky
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  • Googling on the error message found several similar problems. E.g. this one: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/673085. They say that addition `-mimplicit-it=thumb` to CXXFLAGS (cmake variane: CMAKE_CXX_FLAGS) should help. – Tsyvarev Sep 21 '15 at 16:50
  • @Tsyvarev Thank you so much its work for me... – Vicky Sep 22 '15 at 04:35
  • @Tsyvarev my compiler says that flag is unrecognized. Any thoughts why? – dmagree Mar 14 '16 at 18:25
  • @dmagree: I am not an expert in compiler features. You may fill another question though. – Tsyvarev Mar 14 '16 at 18:54
  • @dmagree this answer, http://stackoverflow.com/a/35998110/3154588, says to use ``-Wa,-mimplicit-it=thumb`` to pass the option from the compiler through to the assembler. – Phil May 24 '16 at 15:48

1 Answers1

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got same error in tbb bitbake recipe in my yocto build while bitbake compiling , added CXXFLAGS=" -Wa,-mimplicit-thumb" in tbb.bb file helps me. you can try TARGET_CXXFLAGS=" -Wa,-mimplicit-thumb" aswell.

aaripaka prashad
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