2022-03-25 08:26:37 +00:00
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set(WASM_CXX_ENGINE_FLAGS "")
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set(WASM_ENGINE_FLAGS "")
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set(WASM_ENGINE_FLAGS "-s LLD_REPORT_UNDEFINED -s USE_PTHREADS=1")
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# needed for loading files in a c-like style
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s FILESYSTEM=1 -s FORCE_FILESYSTEM=1")
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# load data directory to the filesystem
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} --preload-file data")
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# remove some annoyance for now, TODO
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} --allow-multiple-definition -Wl,--shared-memory,--no-check-features")
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# TODO
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#set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -lwebsocket.js -s PROXY_POSIX_SOCKETS=1")
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2022-10-25 16:51:56 +00:00
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# use Web Assembly & a WebGL2 compatible GLES3 implementation
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2022-03-25 08:26:37 +00:00
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s WASM=1")
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s USE_WEBGL2=1")
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s FULL_ES3=1")
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s DEFAULT_LIBRARY_FUNCS_TO_INCLUDE=[\"$autoResumeAudioContext, $dynCall\"]")
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# this flag is the most important one. It tells SDL2 to call emscripten functions when polling event
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s ASYNCIFY=1")
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# TODO, has to be fixed in SDL2, can improve responsivness of the site
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#set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s PROXY_TO_PTHREAD=1")
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# SDL2 is compiled by the gen_libs.sh script for easy up to date code
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#set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s USE_SDL=2")
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#set(WASM_CXX_ENGINE_FLAGS "${WASM_CXX_ENGINE_FLAGS} -s USE_SDL=2")
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# even if slower, memory growth has the advantage of using less resources, keep it on for now (instead of a static memory pool)
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s ALLOW_MEMORY_GROWTH=1")
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#set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s INITIAL_MEMORY=2000MB")
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s MAXIMUM_MEMORY=2000MB")
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# not optimal but required so that threads are created on fly (instead of delayed when the next javascript calls come in)
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -s PTHREAD_POOL_SIZE=10")
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if(NOT (CMAKE_BUILD_TYPE STREQUAL "Debug"))
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# will drastically reduce code size
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set(WASM_ENGINE_FLAGS "${WASM_ENGINE_FLAGS} -flto")
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endif()
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread -D_REENTRANT -g -O3 ${WASM_CXX_ENGINE_FLAGS}")
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set(CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} -pthread -D_REENTRANT -g -O3 ${WASM_CXX_ENGINE_FLAGS}")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pthread ${WASM_ENGINE_FLAGS}")
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set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${WASM_ENGINE_FLAGS}")
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2022-10-19 21:46:06 +00:00
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set(CMAKE_RUST_COMPILER_TARGET wasm32-unknown-emscripten)
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