What files are needed to compile the wasm for HTML, and what other parameters are needed？

[DebugNoob]

HI, your project is amazing to me. I want to try modifying some parameters to compile wasm and encountered some issues. What files are needed to compile the wasm for HTML, and what other parameters are needed?

[sz3]

For the wasm build (and the asm.js build), I use a docker container and run this script inside it. The docker command is the (commented out) 2nd line of the script: https://github.com/sz3/libcimbar/blob/master/package-wasm.sh

You can also see how it's used by the github actions workflow here. The only real interesting thing is that you need to download opencv and extract it to the opencv4/ subdirectory ahead of time.

[DebugNoob]

Thank you very much ^_^. But I have encountered a new problem that I searched the internet but couldn't find the relevant answer. Have you encountered it again? When I execute to make -j5 install

[ 61%] Building CXX object build/src/third_party_lib/wirehair/CMakeFiles/wirehair.dir/wirehair.cpp.o
clang++: error: unsupported option '-march=' for target 'wasm32-unknown-emscripten'
em++: error: '/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fignore-exceptions -fvisibility=default -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -DEMSCRIPTEN --sysroot=/emsdk/upstream/emscripten/cache/sysroot -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -DLIBCIMBAR_PROJECT_ROOT="/usr/src/app" -I/usr/src/app/opencv4/include -I/usr/src/app/opencv4/opencv-build-wasm/build_wasm -I/usr/src/app/opencv4/modules/calib3d/include -I/usr/src/app/opencv4/modules/core/include -I/usr/src/app/opencv4/modules/dnn/include -I/usr/src/app/opencv4/modules/features2d/include -I/usr/src/app/opencv4/modules/flann/include -I/usr/src/app/opencv4/modules/gapi/include -I/usr/src/app/opencv4/modules/highgui/include -I/usr/src/app/opencv4/modules/imgcodecs/include -I/usr/src/app/opencv4/modules/imgproc/include -I/usr/src/app/opencv4/modules/ml/include -I/usr/src/app/opencv4/modules/objdetect/include -I/usr/src/app/opencv4/modules/photo/include -I/usr/src/app/opencv4/modules/stitching/include -I/usr/src/app/opencv4/modules/ts/include -I/usr/src/app/opencv4/modules/video/include -I/usr/src/app/opencv4/modules/videoio/include -I/usr/src/app/opencv4/modules/world/include -I/usr/src/app/src/lib -I/usr/src/app/src/third_party_lib -I/usr/src/app/src/third_party_lib/wirehair/include -DGF256_TARGET_MOBILE -march=native -Os -std=gnu++11 -MD -MT build/src/third_party_lib/wirehair/CMakeFiles/wirehair.dir/wirehair.cpp.o -MF CMakeFiles/wirehair.dir/wirehair.cpp.o.d -c /usr/src/app/src/third_party_lib/wirehair/wirehair.cpp -o CMakeFiles/wirehair.dir/wirehair.cpp.o' failed (returned 1)
make[2]: *** [build/src/third_party_lib/wirehair/CMakeFiles/wirehair.dir/build.make:77: build/src/third_party_lib/wirehair/CMakeFiles/wirehair.dir/wirehair.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:669: build/src/third_party_lib/wirehair/CMakeFiles/wirehair.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

😢

[sz3]

Ok, I'm seeing the same error when using emscripten/emsdk:latest. Thanks for noticing this... I think we need to use a (slightly) older emscripten image.

[sz3]

emscripten/emsdk:3.1.39 works.

[sz3]

https://github.com/sz3/libcimbar/pull/75

[DebugNoob]

Thank you very much! Wishing you great success in your future work!