901ad84339
Copy the list of .cpp files from the Android project, assuming this will be similar in scope. Signed-off-by: Michael Stahl <michael.stahl@allotropia.de> Change-Id: I57c7ad2f10d1867307ff4fcea3d0c650726d18d8 |
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Makefile.am | ||
poco-1.12.4-emscripten.patch | ||
poco-devel-emscripten.patch | ||
README | ||
wasmapp.cpp | ||
wasmapp.hpp |
= WASM with emscripten = Building for WASM with emscripten is still a bit immature and many projects need patching to work. Note that there are wrapper tools like "emconfigure", "emmake", "emcmake" that tend to set up environment variables like CC properly, although some project's build system unfortunately override that. For convenience it's recommended to build with a docker container that has the required build tools. podman pull public.ecr.aws/allotropia/libo-builders/wasm == Build dependencies == First you need to build LibreOffice core with emscripten. Currently best to use "feature/wasm" branch. podman run -v $HOME/lo/feature_wasm:$HOME/lo/feature_wasm:ro -v /data/lo/build_feature_wasm:/data/lo/build_feature_wasm -v $HOME/lo/ext_sources:/ext_sources:ro --security-opt=label=disable -ti public.ecr.aws/allotropia/libo-builders/wasm /bin/bash -c 'source /home/builder/emsdk/emsdk_env.sh && cd /data/lo/build_feature_wasm/ && /home/ms/lo/feature_wasm/autogen.sh --with-external-tar=/ext_sources --with-distro=LibreOfficeWASM32' podman run -v $HOME/lo/feature_wasm:$HOME/lo/feature_wasm:ro -v /data/lo/build_feature_wasm:/data/lo/build_feature_wasm -v $HOME/lo/ext_sources:/ext_sources:rw --security-opt=label=disable -ti public.ecr.aws/allotropia/libo-builders/wasm /bin/bash -c 'source /home/builder/emsdk/emsdk_env.sh && cd /data/lo/build_feature_wasm/ && make -rj8' Then build libzstd: * with assembly code disabled * using the Makefile (didn't try its other build systems) tar -xzvf ~/Downloads/zstd-1.5.2.tar.gz cd zstd-1.5.2/ podman run -v /data/lo/zstd-1.5.2:/data/lo/zstd-1.5.2:rw --security-opt=label=disable -ti public.ecr.aws/allotropia/libo-builders/wasm /bin/bash -c 'source /home/builder/emsdk/emsdk_env.sh && cd /data/lo/zstd-1.5.2/ && emmake make -j8 lib-nomt ZSTD_NO_ASM=1' Then build POCO: * this requires a patch (currently exists patch for 1.12.4 and untested "devel" branch) * note that the header Poco/Platform.h maps EMSCRIPTEN to POCO_OS_LINUX * it has both Makefiles and CMake but i couldn't get CMake to use CXXFLAGS to disable some Linux-specific code; i tried variations on: emcmake cmake -S .. -DENABLE_MONGODB=off -DENABLE_DATA_SQLITE=off -DENABLE_REDIS=off -DENABLE_PROMETHEUS=off -DENABLE_PDF=off -DENABLE_SEVENZIP=off -DENABLE_ZIP=off -DENABLE_CPPPARSER=off -DENABLE_POCODOC=off -DENABLE_PAGECOMPILER=off -DENABLE_PAGECOMPILER_FILE2PAGE=off -DENABLE_ACTIVERECORD=off -DENABLE_ACTIVERECORD_COMPILER=off -DENABLE_DATA=off -DENABLE_DATA_ODBC=off -DENABLE_DATA_POSTGRESQL=off -DENABLE_DATA_MYSQL=off -DENABLE_APACHECONNECTOR=off -DENABLE_JWT=off CXXFLAGS=-DPOCO_NO_LINUX_IF_PACKET_H * Online requires a single include directory so "make install" must be used tar -xjvf ~/Downloads/poco-1.12.4-all.tar.bz2 cd poco-1.12.4-all patch -p1 < $HOME/lo/online/wasm/poco-1.12.4-emscripten.patch podman run -v /data/lo/poco-1.12.4-all:/data/lo/poco-1.12.4-all:rw --security-opt=label=disable -ti public.ecr.aws/allotropia/libo-builders/wasm /bin/bash -c 'source /home/builder/emsdk/emsdk_env.sh && cd /data/lo/poco-1.12.4-all && emconfigure ./configure --static --no-samples --no-tests --omit=Crypto,NetSSL_OpenSSL,JWT,Data,Data/SQLite,Data/ODBC,Data/MySQL,Data/PostgreSQL,Zip,PageCompiler,PageCompiler/File2Page,MongoDB,Redis,ActiveRecord,ActiveRecord/Compiler,Prometheus && emmake make -j8 CC=/home/builder/emsdk/upstream/emscripten/emcc CXX=/home/builder/emsdk/upstream/emscripten/em++ LD=/home/builder/emsdk/upstream/emscripten/em++ CXXFLAGS=-DPOCO_NO_LINUX_IF_PACKET_H && make -j8 install INSTALLDIR=/data/lo/poco-1.12.4-all/install' == Build Online == Then build Online itself: podman run -v /data/lo/zstd-1.5.2:/data/lo/zstd-1.5.2:ro -v /data/lo/poco-1.12.4-all:/data/lo/poco-1.12.4-all:ro -v $HOME/lo/feature_wasm:$HOME/lo/feature_wasm:ro -v /data/lo/build_feature_wasm:/data/lo/build_feature_wasm:ro -v $HOME/lo/online:$HOME/lo/online:rw -v /data/lo/build_online_wasm:/data/lo/build_online_wasm:rw --security-opt=label=disable -ti public.ecr.aws/allotropia/libo-builders/wasm /bin/bash -c "source /home/builder/emsdk/emsdk_env.sh && cd /data/lo/build_online_wasm/ && /home/ms/lo/online/autogen.sh && emconfigure /home/ms/lo/online/configure --with-lokit-path=$HOME/lo/feature_wasm/include --with-lo-path=/data/lo/build_feature_wasm/instdir --with-lo-builddir=/data/lo/build_feature_wasm --with-zstd-includes=/data/lo/zstd-1.5.2/lib --with-zstd-libs=/data/lo/zstd-1.5.2/lib --with-poco-includes=/data/lo/poco-1.12.4-all/install/include --with-poco-libs=/data/lo/poco-1.12.4-all/install/lib --host=wasm32-local-emscripten" podman run -v /data/lo/zstd-1.5.2:/data/lo/zstd-1.5.2:ro -v /data/lo/poco-1.12.4-all:/data/lo/poco-1.12.4-all:ro -v $HOME/lo/feature_wasm:$HOME/lo/feature_wasm:ro -v /data/lo/build_feature_wasm:/data/lo/build_feature_wasm:ro -v $HOME/lo/online:$HOME/lo/online:rw -v /data/lo/build_online_wasm:/data/lo/build_online_wasm:rw --security-opt=label=disable -ti public.ecr.aws/allotropia/libo-builders/wasm /bin/bash -c "source /home/builder/emsdk/emsdk_env.sh && cd /data/lo/build_online_wasm/ && emmake make"