Hi, I was trying to build wsam libraries for my cpp application which is compiled by emscripten. I tried building OpenCV from source using the follwoing resource

https://docs.opencv.org/3.4/d4/da1/tutorial_js_setup.html

source ~/emsdk/emsdk_env.sh

emcmake python3 /opencv/platforms/js/build_js.py \
    /build \
    --build_wasm \
    --clean_build_dir \

but the default modules only contains
calib3d, core, dnn, features2s, flann, imgproc, objdetect, photo, video.

I wanted the imread for reading files from local repository to be usable which exists in imgcodecs I believe.
I tried changing the arguments within build_js.py by switching the default executable under get_cmake_cmd for
-DBUILD_opencv_imgcodecs=ON, but that only generates a folder under modules and not building the required .a library file which I believe I need. I also tried whitelisting trhough adding cmake option arguments for the python3 command --cmake_option=-DBUILD_LIST=core,imgproc,features2d,imgcodecs,highgui \ which seems to be failing because whitelisting does not build 3rd party library zlib and I couldn't figure out how to buiold zlib with white listing too.

for modifying the python build file, I do get the following from terminal output yet no .a file is produced for either highgui or imgcodecs

--   OpenCV modules:
--     To be built:                 calib3d core dnn features2d flann highgui imgcodecs imgproc js objdetect photo video
--     Disabled:                    ml stitching videoio world
...
...

Any advice for this?