I'm having issue with building this demo.
https://github.com/kakukogou/opencvjs_demo_segmentation

when i cd into this folder and run make command i get this error message:

/bin/sh: 1: emcc: not found
make: *** [segmentation] Error 127

this is how make file looks like.

segmentation: ../src/segmentation.cpp ../src/export.cpp
mkdir -p $(OBJDIR)
emcc \
../src/segmentation.cpp \
../src/export.cpp \
-I $(OPENCV_INSTALL_DIR)/include \
$(OPENCV_INSTALL_DIR)/lib/libopencv_core.so \
$(OPENCV_INSTALL_DIR)/lib/libopencv_imgproc.so \
-s EXPORTED_FUNCTIONS="['_on_mouse', '_on_init', '_on_process']" \
-O3 \
--llvm-lto 1 \
--closure 1 \
-s PRECISE_F32=1 \
-s FORCE_ALIGNED_MEMORY=1 \
-s TOTAL_MEMORY=306777216 \
-o ./bin/segmentation.js

clean:
rm ./bin/*.js ./bin/*.mem
.......



i guess it does not recognize "emcc" command. is there any specific 
environment variable i have to set to get this command working.

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