==> Starting build()...
patching file Makefile
Hunk #1 succeeded at 58 with fuzz 2 (offset -4 lines).
patching file Makefile.conf
Hunk #2 succeeded at 73 with fuzz 2.
Recording substitution variables from ./Makefile.versions ./Makefile.conf
perl -p vars-subs.pl auto-multiple-choice.in > auto-multiple-choice
perl -p vars-subs.pl auto-multiple-choice.desktop.in > auto-multiple-choice.desktop
perl -p vars-subs.pl AMC-gui-apropos.glade.in > AMC-gui-apropos.glade
perl -p vars-subs.pl AMC-gui.pl.in > AMC-gui.pl
perl -p vars-subs.pl AMC-latex-link.pl.in > AMC-latex-link.pl
perl -p vars-subs.pl AMC-perl/AMC/Basic.pm.in > AMC-perl/AMC/Basic.pm
perl -p vars-subs.pl doc/doc-xhtml-site.fr.xsl.in > doc/doc-xhtml-site.fr.xsl
perl -p vars-subs.pl doc/doc-xhtml-site.ja.xsl.in > doc/doc-xhtml-site.ja.xsl
perl -p vars-subs.pl doc/doc-xhtml-site.en.xsl.in > doc/doc-xhtml-site.en.xsl
perl -p vars-subs.pl doc/amcdocstyle.sty.in > doc/amcdocstyle.sty
perl -p vars-subs.pl doc/doc-xhtml.xsl.in > doc/doc-xhtml.xsl
perl -p vars-subs.pl doc/auto-multiple-choice.fr.in.xml > doc/auto-multiple-choice.fr.xml
perl -p vars-subs.pl doc/auto-multiple-choice.en.in.xml > doc/auto-multiple-choice.en.xml
perl -p vars-subs.pl doc/auto-multiple-choice.ja.in.xml > doc/auto-multiple-choice.ja.xml
perl -p vars-subs.pl doc/sty/automultiplechoice.dtx.in > doc/sty/automultiplechoice.dtx
gcc -o AMC-detect AMC-detect.cc -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -fno-plt -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now  -lstdc++ -lm -I/usr/include/opencv  -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_dpm -lopencv_face -lopencv_photo -lopencv_freetype -lopencv_fuzzy -lopencv_hdf -lopencv_img_hash -lopencv_line_descriptor -lopencv_optflow -lopencv_reg -lopencv_rgbd -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_phase_unwrapping -lopencv_surface_matching -lopencv_tracking -lopencv_datasets -lopencv_text -lopencv_dnn -lopencv_plot -lopencv_xfeatures2d -lopencv_shape -lopencv_video -lopencv_ml -lopencv_ximgproc -lopencv_calib3d -lopencv_features2d -lopencv_highgui -lopencv_videoio -lopencv_flann -lopencv_xobjdetect -lopencv_imgcodecs -lopencv_objdetect -lopencv_xphoto -lopencv_imgproc -lopencv_core
/usr/bin/ld: warning: libIlmImf-2_2.so.22, needed by /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so, not found (try using -rpath or -rpath-link)
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::globalThreadCount()'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::ChannelList::insert(char const*, Imf_2_2::Channel const&)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::InputFile::header() const'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::hasChromaticities(Imf_2_2::Header const&)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::OutputFile::writePixels(int)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::InputFile::setFrameBuffer(Imf_2_2::FrameBuffer const&)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::InputFile::readPixels(int, int)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::Channel::Channel(Imf_2_2::PixelType, int, int, bool)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::FrameBuffer::begin()'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::Slice::Slice(Imf_2_2::PixelType, char*, unsigned long, unsigned long, int, int, double, bool, bool)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::OutputFile::setFrameBuffer(Imf_2_2::FrameBuffer const&)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::Header::dataWindow() const'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::Header::channels()'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::Header::channels() const'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::Header::~Header()'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::Header::Header(int, int, float, Imath_2_2::Vec2<float> const&, float, Imf_2_2::LineOrder, Imf_2_2::Compression)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::InputFile::InputFile(char const*, int)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::OutputFile::OutputFile(char const*, Imf_2_2::Header const&, int)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::FrameBuffer::insert(char const*, Imf_2_2::Slice const&)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::ChannelList::findChannel(char const*) const'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::chromaticities(Imf_2_2::Header const&)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::FrameBuffer::end()'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::Chromaticities::Chromaticities(Imath_2_2::Vec2<float> const&, Imath_2_2::Vec2<float> const&, Imath_2_2::Vec2<float> const&, Imath_2_2::Vec2<float> const&)'
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../lib/libopencv_imgcodecs.so: undefined reference to `Imf_2_2::OutputFile::~OutputFile()'
collect2: error: ld returned 1 exit status
make: *** [Makefile:123: AMC-detect] Error 1