emnapiUsing CMake
See Getting Started for environment setup.
Create CMakeLists.txt.
cmake
cmake_minimum_required(VERSION 3.13) project(emnapiexample) add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/node_modules/emnapi") add_executable(hello hello.c) target_link_libraries(hello emnapi) if(CMAKE_SYSTEM_NAME STREQUAL "Emscripten") target_link_options(hello PRIVATE "-sEXPORTED_FUNCTIONS=['_napi_register_wasm_v1','_node_api_module_get_api_version_v1','_malloc','_free']" ) elseif(CMAKE_SYSTEM_NAME STREQUAL "WASI") set_target_properties(hello PROPERTIES SUFFIX ".wasm") target_link_options(hello PRIVATE "-mexec-model=reactor" "-Wl,--export=napi_register_wasm_v1" "-Wl,--export-if-defined=node_api_module_get_api_version_v1" "-Wl,--initial-memory=16777216,--export-dynamic,--export=malloc,--export=free,--import-undefined,--export-table" ) elseif((CMAKE_C_COMPILER_TARGET STREQUAL "wasm32") OR (CMAKE_C_COMPILER_TARGET STREQUAL "wasm32-unknown-unknown")) set_target_properties(hello PROPERTIES SUFFIX ".wasm") target_link_options(hello PRIVATE "-nostdlib" "-Wl,--export=napi_register_wasm_v1" "-Wl,--export-if-defined=node_api_module_get_api_version_v1" "-Wl,--no-entry" "-Wl,--initial-memory=16777216,--export-dynamic,--export=malloc,--export=free,--import-undefined,--export-table" ) target_link_libraries(hello dlmalloc) # target_link_libraries(hello emmalloc) endif()cmake_minimum_required(VERSION 3.13) project(emnapiexample) add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/node_modules/emnapi") add_executable(hello hello.c) target_link_libraries(hello emnapi) if(CMAKE_SYSTEM_NAME STREQUAL "Emscripten") target_link_options(hello PRIVATE "-sEXPORTED_FUNCTIONS=['_napi_register_wasm_v1','_node_api_module_get_api_version_v1','_malloc','_free']" ) elseif(CMAKE_SYSTEM_NAME STREQUAL "WASI") set_target_properties(hello PROPERTIES SUFFIX ".wasm") target_link_options(hello PRIVATE "-mexec-model=reactor" "-Wl,--export=napi_register_wasm_v1" "-Wl,--export-if-defined=node_api_module_get_api_version_v1" "-Wl,--initial-memory=16777216,--export-dynamic,--export=malloc,--export=free,--import-undefined,--export-table" ) elseif((CMAKE_C_COMPILER_TARGET STREQUAL "wasm32") OR (CMAKE_C_COMPILER_TARGET STREQUAL "wasm32-unknown-unknown")) set_target_properties(hello PROPERTIES SUFFIX ".wasm") target_link_options(hello PRIVATE "-nostdlib" "-Wl,--export=napi_register_wasm_v1" "-Wl,--export-if-defined=node_api_module_get_api_version_v1" "-Wl,--no-entry" "-Wl,--initial-memory=16777216,--export-dynamic,--export=malloc,--export=free,--import-undefined,--export-table" ) target_link_libraries(hello dlmalloc) # target_link_libraries(hello emmalloc) endif()Building with emcmake, output build/hello.js and build/hello.wasm.
If you use node-addon-api, you can use -DEMNAPI_FIND_NODE_ADDON_API=ON or manually add node-addon-api directory to the include dir via include_directories() or target_include_directories().
bash
mkdir build # emscripten emcmake cmake -DCMAKE_BUILD_TYPE=Release \ -DEMNAPI_FIND_NODE_ADDON_API=ON \ -G Ninja -H. -Bbuild # wasi-sdk cmake -DCMAKE_TOOLCHAIN_FILE=$WASI_SDK_PATH/share/cmake/wasi-sdk.cmake \ -DWASI_SDK_PREFIX=$WASI_SDK_PATH \ -DEMNAPI_FIND_NODE_ADDON_API=ON \ -DCMAKE_BUILD_TYPE=Release \ -G Ninja -H. -Bbuild # wasm32 cmake -DCMAKE_TOOLCHAIN_FILE=node_modules/emnapi/cmake/wasm32.cmake \ -DLLVM_PREFIX=$WASI_SDK_PATH \ -DCMAKE_BUILD_TYPE=Release \ -G Ninja -H. -Bbuild cmake --build buildmkdir build # emscripten emcmake cmake -DCMAKE_BUILD_TYPE=Release \ -DEMNAPI_FIND_NODE_ADDON_API=ON \ -G Ninja -H. -Bbuild # wasi-sdk cmake -DCMAKE_TOOLCHAIN_FILE=$WASI_SDK_PATH/share/cmake/wasi-sdk.cmake \ -DWASI_SDK_PREFIX=$WASI_SDK_PATH \ -DEMNAPI_FIND_NODE_ADDON_API=ON \ -DCMAKE_BUILD_TYPE=Release \ -G Ninja -H. -Bbuild # wasm32 cmake -DCMAKE_TOOLCHAIN_FILE=node_modules/emnapi/cmake/wasm32.cmake \ -DLLVM_PREFIX=$WASI_SDK_PATH \ -DCMAKE_BUILD_TYPE=Release \ -G Ninja -H. -Bbuild cmake --build build